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Akebia Therapeutics, Inc.

akba · NASDAQ Healthcare
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FY2023 Annual Report · Akebia Therapeutics, Inc.
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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

☒

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

☐

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2023

OR

For the transion period from _to_

Commission File Number 001-36352

AKEBIA THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdicon of
incorporaon or organizaon)

 245 First Street, Cambridge, MA
(Address of principal execuve offices)

20-8756903
(I.R.S. Employer
Idenficaon No.)

02142
(Zip Code)

Registrant’s telephone number, including area code: (617) 871-2098

Securies registered pursuant to Secon 12(b) of the Act:

Title of each class

Common Stock, $0.00001 par value per share

Trading Symbol(s)
AKBA

Name of each exchange on which registered
The Nasdaq Capital Market

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securies Act.    Yes  ☐ No  ☒   

Indicate by check mark if the registrant is not required to file reports pursuant to Secon 13 or 15(d) of the Act.    Yes  ☐ No  ☒

Securies registered pursuant to Secon 12(g) of the Act: None

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Secon 13 or 15(d) of the Securies Exchange Act of 1934 during the preceding 12 months (or for
such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒ No  ☐

Indicate  by  check  mark  whether  the  registrant  has  submied  electronically  every  Interacve  Data  File  required  to  be  submied  pursuant  to  Rule  405  of  Regulaon  S-T  (§  232.405  of  this
chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes ☒ No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporng company, or an emerging growth company. See the
definions of “large accelerated filer,” “accelerated filer,” “smaller reporng company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer
Non-accelerated filer

☐
☐

Accelerated filer
Smaller reporng company
Emerging growth company

☒
☒
☐

If  an  emerging  growth  company,  indicate  by  check  mark  if  the  registrant  has  elected  not  to  use  the  extended  transion  period  for  complying  with  any  new  or  revised  financial  accounng
standards provided pursuant to Secon 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and aestaon to its management’s assessment of the effecveness of its internal control over financial reporng under
Secon 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounng firm that prepared or issued its audit report. ☒

If securies are registered pursuant to Secon 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correcon of an error
to previously issued financial statements. ☐

Indicate by check mark whether any of those error correcons are restatements that required a recovery analysis of incenve-based compensaon received by any of the registrant’s execuve
officers during the relevant recovery period pursuant to § 240.10D-1(b). ☐

Indicate by check mark whether registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

 
 
 
 
The aggregate market value of the vong and non-vong common equity held by non-affiliates of the registrant, based on the closing price of the registrant’s Common Stock on The Nasdaq
Global Market on June 30, 2023, was $169,721,714.

The number of shares of registrant’s Common Stock outstanding as of March 13, 2024 was 209,372,275.

The  registrant  intends  to  file  a  definive  proxy  statement  pursuant  to  Regulaon  14A  in  connecon  with  its  2024  Annual  Meeng  of  Stockholders  within  120  days  aer  the  end  of  the
registrant’s fiscal year ended December 31, 2023. Porons of the proxy statement are incorporated by reference into Part III of this Annual Report on Form 10-K.

DOCUMENTS INCORPORATED BY REFERENCE

Table of Contents

Akebia Therapeucs, Inc.
Form 10-K
For the Year Ended December 31, 2023

TABLE OF CONTENTS

Cauonary Note Regarding Forward Looking Statements
Risk Factors Summary
PART I
Business
Risk Factors
Unresolved Staff Comments
Cybersecurity
Properes
Legal Proceedings
Mine Safety Disclosures
PART II
Market for Registrant’s Common Equity, Related Stockholder Maers and Issuer Purchases of Equity Securies
[Reserved]
Management’s Discussion and Analysis of Financial Condion and Results of Operaons
Quantave and Qualitave Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounng and Financial Disclosure
Controls and Procedures
Other Informaon
Disclosure Regarding Foreign Jurisdicons that Prevent Inspecons
PART III
Directors, Execuve Officers and Corporate Governance
Execuve Compensaon
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Maers
Certain Relaonships and Related Transacons, and Director Independence
Principal Accountant Fees and Services
PART IV
Exhibits and Financial Statement Schedules
Form 10-K Summary
SIGNATURES

Item 1.
Item 1A.
Item 1B.
Item 1C.
Item 2.
Item 3.
Item 4.

Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.
Item 9C.

Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

Item 15.
Item 16.

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In this Annual Report on Form 10-K, or Form 10-K, unless otherwise stated or the context otherwise requires, references to “Akebia,” “we,” “us,” “our,” “the
Company,” "our Company" and similar references refer to Akebia Therapeucs, Inc. and, where appropriate, its consolidated subsidiaries. On December 12,
2018, in connecon with the consummaon of the merger, or Merger, with Keryx Biopharmaceucals, Inc., or Keryx, Keryx became a wholly owned subsidiary
of the Company.

AURYXIA®, AKEBIA Therapeucs®, Vafseo® and their associated logos are trademarks of Akebia and/or its affiliates. All other trademarks, trade names and
service marks appearing in this Form 10-K are the property of their respecve owners. Solely for convenience, trademarks, trade names and service marks
referred to in this Form 10-K may appear without the ® or 
symbols, but such references are not intended to indicate, in any way, that the applicable licensor will not assert, to the fullest extent under applicable law, its
rights to these trademarks and trade names. We do not intend our use or display of other companies’ trade names, trademarks or service marks to imply a
relaonship with, or endorsement or sponsorship of us by, any other company.

TM

Akebia Therapeucs, Inc. | Form 10-K | Page 1

 
Table of Contents

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This  Annual  Report  on  Form  10-K,  or  Form 10-K,  contains  forward-looking  statements  that  are  being  made  pursuant  to  the  provisions  of  the  U.S.  Private
Securies Ligaon Reform Act of 1995 with the intenon of obtaining the benefits of the “safe harbor” provisions of that Act. All statements contained in
this Form 10-K other than statements of historical fact are forward-looking statements. These forward-looking statements may be accompanied by words
such as “ancipate,” “believe,” “build,” “can,” “contemplate,” “connue,” “could,” “should,” “designed,” “esmate,” “project,” “expect,” “forecast,” “future,”
“goal,” “intend,” “likely,” “may,” “plan,” “possible,” “potenal,” “predict,” “strategy,” “seek,” “target,” “will,” “would,” and other words and terms of similar
meaning, but the absence of these words does not necessarily mean that a statement is not forward-looking. These forward-looking statements include, but
are not limited to, statements about:

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the ming of or likelihood of regulatory filings and approvals, including with respect to labeling or other restricons, such as the ancipated
ming  of  a  response  by  the  FDA  to  our  resubmission  of  our  new  drug  applicaon  for  vadadustat  following  our  receipt  of  a  complete
response leer from the FDA, and potenal indicaons for vadadustat;

the potenal therapeuc benefits, safety profile, and effecveness of vadadustat; 

our pipeline and porolio, including its potenal, and our related research and development acvies;

the  ming,  investment  and  associated  acvies  involved  in  connued  commercializaon  of  Auryxia®  (ferric  citrate),  its  growth
opportunies and our ability to execute thereon;

the potenal indicaons, demand and market opportunity, potenal and acceptance of Auryxia and vadadustat, if approved, including the
size of eligible paent populaons; 

the potenal therapeuc applicaons of the hypoxia inducible factor pathway;

our compeve posion, including esmates, developments and projecons relang to our competors and their products and product
candidates, and our industry; 

our  expectaons,  projecons  and  esmates  regarding  our  capital  requirements,  need  for  addional  capital,  financing  our  future  cash
needs,  costs,  expenses,  revenues,  capital  resources,  cash  flows,  financial  performance,  profitability,  tax  obligaons,  liquidity,  growth,
contractual obligaons and the period of me our cash resources will fund our current operang plan, esmates with respect to our ability
to  operate  as  a  going  concern,  our  internal  control  over  financial  reporng  and  disclosure  controls  and  procedures,  and  any  future
deficiencies or material weaknesses in our internal controls and procedures; 

delivering value broadly to the kidney community, as well as others who may benefit from our medicines, will result in delivering value for
stockholders;

the direct or indirect impacts of the recent COVID-19 pandemic on our business, operaons and the markets and communies in which we
and our partners, collaborators, vendors, and customers operate;

our  manufacturing,  supply  and  quality  maers  and  any  recalls,  write-downs,  impairments  or  other  related  consequences  or  potenal
consequences;

esmates,  beliefs  and  judgments  related  to  the  valuaon  of  intangible  asset,  goodwill,  debt  and  other  assets  and  liabilies,  including
classificaon  of  expenses,  assets  and  liabilies,  our  impairment  analyses  and  our  methodology  and  assumpons  regarding  fair  value
measurements;

the ming of the availability and disclosure of clinical trial data and results;

the designs of our studies, and the type of informaon and data expected from our studies and the expected benefits thereof;

our  and  our  collaborators’  strategy,  plans  and  expectaons  with  respect  to  the  development,  manufacturing,  supply,  commercializaon,
launch, markeng and sale of Auryxia, Vafseo and vadadustat, if approved, and the associated ming thereof;

our ability to maintain any markeng authorizaons we currently hold or will obtain, including our markeng authorizaons for Auryxia and
our ability to complete post-markeng requirements with respect thereto;

our ability to negoate, secure and maintain adequate pricing, coverage and reimbursement terms and processes on a mely basis, or at
all, with third-party payors for Auryxia and vadadustat, if approved;

the ming of iniaon of our clinical trials and plans to conduct preclinical studies and clinical trials in the future; 

the ming and amounts of payments from or to our collaborators and licensees, and the ancipated arrangements and benefits under our
collaboraon and license agreements, including with respect to milestones and royales; 

Akebia Therapeucs, Inc. | Form 10-K | Page 2

Table of Contents

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our  intellectual  property  posion,  including  obtaining  and  maintaining  patents,  and  the  ming,  outcome  and  impact  of  administrave,
regulatory, legal and other proceedings relang to our patents and other proprietary and intellectual property rights, patent infringement
suits that we have filed or may file, or other acons that we may take against companies, and the ming and resoluon thereof;

expected  ongoing  reliance  on  third  pares,  including  with  respect  to  the  development,  manufacturing,  supply  and  commercializaon  of
Auryxia and vadadustat, if approved;

accounng standards and esmates, their impact, and their expected ming of compleon;

esmated periods of performance of key contracts;

our facilies, lease commitments, and future availability of facilies;

cybersecurity;

insurance coverage;

management of personnel, including our management team, and our employees, including employee compensaon, employee relaons,
and our ability to aract, train and retain high quality employees;

the implementaon of our business model, current operang plan, and strategic plans for our business, product candidates and technology,
and business development opportunies including potenal collaboraons, alliances, mergers, acquisions or licensing of assets;

addional costs we may incur due to events associated with or resulng from our prior workforce reducons or other operang expenses,
including addional costs related to vadadustat and selling, general and administrave expenses; and

the ming, outcome and impact of current and any future legal proceedings.

Any  or  all  of  these  forward-looking  statements  in  this  Form  10-K  may  turn  out  to  be  inaccurate.  These  forward-looking  statements  involve  risks  and
uncertaines, including those that are discussed below under the heading "Risk Factors Summary", and the risk factors idenfied further in Part I, Item 1A.
"Risk Factors" included in this Form 10-K and elsewhere in this Form 10-K and in our Securies and Exchange Commission reports filed aer this report, that
could  cause  our  actual  results,  financial  condion,  performance  or  achievements  to  be  materially  different  from  those  indicated  in  these  forward-looking
statements. Given these risks and uncertaines, you should not place undue reliance on these forward-looking statements. Forward-looking statements speak
only as of the date of this Form 10-K. Except as required by law, we assume no obligaon to publicly update or revise these forward-looking statements for
any reason. Unless otherwise stated, our forward-looking statements do not reflect the potenal impact of any future acquisions, mergers, disposions,
joint ventures or investments we may make.

This  Form  10-K  also  contains  esmates  and  other  informaon  concerning  our  industry  and  the  markets  for  certain  diseases,  including  data  regarding  the
esmated  size  of  those  markets,  and  the  incidence  and  prevalence  of  certain  medical  condions.  Unless  otherwise  expressly  stated,  we  obtained  this
industry, market and other data from reports, research surveys, studies and similar data prepared by market research firms and other third pares, industry,
medical and general publicaons, government data and similar sources.

Akebia Therapeucs, Inc. | Form 10-K | Page 3

Table of Contents

RISK FACTORS SUMMARY

Invesng in our common stock involves numerous risks, including the risks summarized below and described in further detail in “Part I, Item 1A. Risk Factors”
of  this  Form  10-K,  any  one  of  which  could  materially  adversely  affect  our  business,  financial  condion,  results  of  operaons,  and  prospects.  These  risks
include, but are not limited to, the following.

• We have incurred significant losses since our incepon and ancipate that we will connue to incur losses and cannot guarantee when, if ever, we

will become profitable or aain posive cash flows.

• We  may  require  substanal  addional  financing  to  fund  our  business.  A  failure  to  obtain  this  necessary  capital  when  needed,  or  on  acceptable

terms, could force us to delay, limit, reduce or terminate our product development or commercializaon efforts.

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Raising addional capital may cause diluon to our exisng stockholders, restrict our operaons or require us to relinquish rights to our product and
product candidates on unfavorable terms to us.

If we fail to comply with the connued lisng requirements of Nasdaq, our common stock may be delisted and the price of our common stock and
our ability to access the capital markets could be negavely impacted.

• We  may  not  be  successful  in  our  efforts  to  idenfy,  acquire,  in-license,  discover,  develop  and  commercialize  addional  products  or  product
candidates or our decisions to priorize the development of certain product candidates over others may not be successful, which could impair our
ability to grow.

• We  may  engage  in  strategic  transacons  to  acquire  assets,  businesses,  or  rights  to  products,  product  candidates  or  technologies  or  form
collaboraons or make investments in other companies or technologies that could harm our operang results, dilute our stockholders’ ownership,
increase our debt, or cause us to incur significant expense.

• Our obligaons in connecon with the Agreement for the Provision of a Loan Facility, or the BlackRock Credit Agreement, with Kreos Capital VII (UK)
Limited,  or  Kreos,  which  are  funds  and  accounts  managed  by  BlackRock  Inc.,  collecvely  BlackRock,  and  requirements  and  restricons  in  the
BlackRock Credit Agreement could adversely affect our financial condion and restrict our operaons.

• Our  Royalty  Interest  Acquision  Agreement  with  HealthCare  Royalty  Partners  IV,  L.P.  contains  various  covenants  and  other  provisions,  which,  if

violated, could materially adversely affect our financial condion.

• Our  business  is  substanally  dependent  on  the  commercial  success  of  Auryxia  and  vadadustat,  if  approved.  If  we  are  unable  to  connue  to
successfully  commercialize  Auryxia  or  vadadustat,  if  approved  and  commercialized,  our  results  of  operaons  and  financial  condion  will  be
materially harmed.

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If we are unable to maintain or expand, or, if vadadustat is approved, iniate, sales and markeng capabilies or enter into addional agreements
with  third  pares,  we  may  not  be  successful  in  commercializing  Auryxia,  vadadustat,  if  approved,  or  any  other  product  candidates  that  may  be
approved.

• Our, or our partners', failure to obtain or maintain adequate coverage, pricing and reimbursement for Auryxia, vadadustat, if approved, or any other
future approved products, could have a material adverse effect on our or our collaboraon partners’ ability to sell such approved products profitably
and otherwise have a material adverse impact on our business.

• We face substanal compeon, which may result in others discovering, developing or commercializing products before, or more successfully than,

we do.

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The  commercializaon  of  Riona  and  Vafseo  in  Japan,  Vafseo  in  Europe  and  other  territories  where  it  is  approved,  and  our  current  and  potenal
future efforts with respect to the development and commercializaon of our products and product candidates outside of the United States, or U.S.,
subject us to a variety of risks associated with internaonal operaons, which could materially adversely affect our business.

Clinical drug development involves a lengthy and expensive process with an uncertain outcome, and we will incur addional costs in connecon
with,  and  may  experience  delays  in  compleng,  or  ulmately  be  unable  to  complete,  the  development  of  vadadustat  and  any  other  product
candidates.

• We may find it difficult to enroll paents in our clinical trials, which could delay or prevent clinical trials of Auryxia, vadadustat or any other product

or product candidate, including those that may be in-licensed or acquired.

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Conducng clinical trials outside of the U.S., as we have done historically and as we may decide to do in the future, presents addional risks and
complexies and, if we decide to conduct a clinical trial outside of the U.S. in the future, we may not complete such trials successfully, in a mely
manner, or at all, which could affect our ability to obtain regulatory approvals.

Auryxia, vadadustat or any other product or product candidate, including those that may be in-licensed or acquired, may cause undesirable side
effects or have other properes that may delay or prevent markeng approval or limit their commercial potenal.

Akebia Therapeucs, Inc. | Form 10-K | Page 4

Table of Contents

• We may not be able to obtain markeng approval for vadadustat or any other product candidate, or we may experience significant delays in doing

so, any of which would materially harm our business.

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Products  approved  for  markeng  are  subject  to  extensive  post-markeng  regulatory  requirements  and  could  be  subject  to  post-markeng
restricons or withdrawal from the market, and we may be subject to penales, including withdrawal of markeng approval, if we fail to comply
with  regulatory  requirements  or  if  we  experience  unancipated  problems  with  our  products,  or  product  candidates,  when  and  if  any  of  them  is
approved.

• We are subject to complex regulatory schemes that require significant resources to ensure compliance and our failure to comply with applicable laws
could  subject  us  to  government  scruny  or  enforcement,  potenally  resulng  in  costly  invesgaons,  fines,  penales  or  sancons,  contractual
damages, reputaonal harm, administrave burdens and diminished profits and future earnings.

• We will incur significant liability if it is determined that we are promong any “off-label” use of Auryxia or any other product we may develop, in-

license or acquire or if it is determined that any of our acvies violates the federal An-Kickback Statute.

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Disrupons in the U.S. Food and Drug Administraon, regulatory authories outside the U.S. and other government agencies caused by global health
concerns or funding shortages could prevent new products and services from being developed or commercialized in a mely manner, which could
negavely impact our business.

Compliance  with  privacy  and  data  security  requirements  could  result  in  addional  costs  and  liabilies  to  us  or  inhibit  our  ability  to  collect  and
process data globally, and the failure to comply with such requirements could subject us to significant fines and penales, which may have a material
adverse effect on our business, financial condion or results of operaons.

Legislave  and  regulatory  healthcare  reform  may  increase  the  difficulty  and  cost  for  us  to  obtain  markeng  approval  of  and  commercialize  our
product candidates and affect the prices we may obtain for any products that are approved in the U.S. or foreign jurisdicons.

• We depend on collaboraons with third pares for the development and commercializaon of Auryxia, Riona, Vafseo and vadadustat and if these
collaboraons are not successful or if our collaborators terminate their agreements with us, we may not be able to capitalize on the market potenal
of Auryxia, Riona, Vafseo and vadadustat, and our business could be materially harmed.

• We may seek to establish addional collaboraons and, if we are not able to establish them on commercially reasonable terms, or at all, we may

have to alter our development and commercializaon plans.

• We  rely  upon  third  pares  to  conduct  all  aspects  of  our  product  manufacturing  and  commercial  distribuon,  and  in  many  instances  only  have  a
single supplier or distributor, and the loss of these manufacturers or distributors, their failure to supply us on a mely basis, or at all, or their failure
to successfully carry out their contractual dues or comply with regulatory requirements, cGMP requirements, or guidance could cause delays in or
disrupons to our supply chain and substanally harm our business.

• We rely upon third pares to conduct our clinical trials and certain of our preclinical studies. If they do not successfully carry out their contractual
dues, comply with regulatory requirements or meet expected deadlines, we may not be able to obtain or maintain markeng approval for Auryxia,
vadadustat or any of our product candidates, and our business could be substanally harmed.

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If the licensor of certain intellectual property relang to Auryxia terminates, modifies or threatens to terminate exisng contracts or relaonships
with us, our business may be materially harmed.

If we are unable to adequately protect our intellectual property, third pares may be able to use our intellectual property, which could adversely
affect our ability to compete in the market.

• We may not be able to protect our intellectual property rights throughout the world.

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The intellectual property that we own or have licensed and related non-patent exclusivity relang to our current and future products is, and may be,
limited,  which  could  adversely  affect  our  ability  to  compete  in  the  market  and  adversely  affect  the  value  of  Auryxia,  vadadustat,  if  approved,  or
future products.

The market entry of one or more generic competors or any third party’s aempt to challenge our intellectual property rights will likely limit Auryxia
sales and have an adverse impact on our business and results of operaon.

Ligaon and administrave proceedings, including third party claims of intellectual property infringement and opposion/invalidaon proceedings
against  third  party  patents,  may  be  costly  and  me  consuming  and  may  delay  or  harm  our  drug  discovery,  development  and  commercializaon
efforts.

• We may be subject to claims that our employees, consultants or independent contractors have wrongfully used or disclosed confidenal informaon

of third pares.

Akebia Therapeucs, Inc. | Form 10-K | Page 5

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If  we  fail  to  aract,  retain  and  movate  senior  management  and  qualified  personnel,  we  may  be  unable  to  successfully  develop,  obtain  and/or
maintain markeng approval of and commercialize vadadustat or commercialize Auryxia.

• Our cost savings plan and the associated workforce reducons implemented in April, May and November 2022 may not result in ancipated savings,

could result in total costs and expenses that are greater than expected and could disrupt our business.

• We may encounter difficules in managing our growth, including with respect to our employee base, and managing our partnerships and operaons

successfully.

• We  have  idenfied  a  material  weakness  in  our  internal  control  over  financial  reporng  as  of  December  31,  2023  relang  to  our  accounng  for
inventory  and  inventory  related  transacons.  If  we  are  not  able  to  remediate  this  material  weakness,  or  if  we  experience  addional  material
weaknesses or other deficiencies in our internal control over financial reporng in the future or otherwise fail to maintain an effecve system of
internal  control  over  financial  reporng,  we  may  not  be  able  to  accurately  or  mely  report  our  financial  results  or  prevent  fraud,  and  we  may
conclude that our internal control over financial reporng is not effecve, which may adversely affect our business.

• We are currently subject to legal proceedings that could result in substanal costs and divert management's aenon, and we could be subject to

addional legal proceedings.

• Our stock price has been and may connue to be volale, which could result in substanal losses for holders or future purchasers of our common

stock and lawsuits against us and our officers and directors.

Akebia Therapeucs, Inc. | Form 10-K | Page 6

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Item 1. Business

Overview

PART I

We are a fully integrated, commercial-stage biopharmaceucal company commied to addressing paents’ unmet needs. We have built a business focused
on developing and commercializing innovave therapeucs that we believe serve as a foundaon for future growth. Our purpose is to beer the life of each
person impacted by kidney disease, and we have established ourselves as a leader in the kidney community. We believe our demonstrated ability to deliver
value  broadly  to  the  kidney  community  has  enabled  us  to  build  a  sustainable  company.  Upon  this  solid  foundaon  and  our  connued  commitment  to
paents, we believe focusing on all paents who can realize a meaningful benefit from our medicines will deliver value for our shareholders.

Our current porolio and hypoxia-inducible factor (HIF)-based pipeline includes:

Product

Indicaon

Region(s)

Discovery

Phase 1

Phase 2

Phase 3

Regulatory
Review

Commercial
Approval

In Market

Auryxia®
(ferric citrate)

Hyperphosphatemia,
IDA

2
United States , Japan
2
and Taiwan

1

Vafseo®

Anemia DD-CKD,
Anemia NDD-CKD

3
Japan

Vafseo®

Anemia DD-CKD

4
European Union ,
4
United Kingdom ,
4
Switzerland ,
Australia , Taiwan and
5
Korea

5 

4

Vadadustat

Anemia DD-CKD

1
United States

Vadadustat

Anemia NDD-CKD

6
Global

AKB-9090

AKI, ARDS

1
Global

AKB-10108

ROP

1
Global

1 
Marketed by Akebia
2
Marketed by JT Torii
3
Marketed by MTPC
4 
To be marketed by Medice
5 
To be marketed by MTPC
6
 To be marketed by Akebia; MTPC and Medice have certain rights in their territories

Auryxia® (ferric citrate) is an orally administered medicine approved and marketed in the United States, or U.S., for two indicaons: (1) the control of serum
phosphorus levels in adult paents with dialysis dependent chronic kidney disease, or DD-CKD, and (2) the treatment of iron deficiency anemia, or IDA, in
adult paents with non-dialysis-dependent chronic kidney disease, or NDD-CKD. Today, we market Auryxia in the U.S. with our well-established, nephrology-
focused commercial organizaon. Our Japanese sublicensee, Japan Tobacco, Inc., and its subsidiary, Torii Pharmaceucal Co., Ltd., collecvely, JT and Torii,
commercialize  ferric  citrate  hydrate  as  Riona  in  Japan.  Averoa  SAS,  or  Averoa,  has  an  exclusive  license  to  develop  and  commercialize  ferric  citrate  in  the
European  Economic  Area,  or  EEA,  Turkey,  Switzerland  and  the  United  Kingdom,  or  UK.  We  expect  Averoa  will  apply  for  markeng  authorizaon  for  ferric
citrate in Europe.

Vafseo® (vadadustat) is a HIF prolyl hydroxylase, or HIF-PH, inhibitor, approved in 36 countries as a treatment for anemia due to chronic kidney disease, or
CKD.

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•

•

In  the  European  Union,  or  EU,  the  UK,  Switzerland  and  Australia,  vadadustat  is  approved  under  the  trade  name  Vafseo  for  the  treatment  of
symptomac  anemia  associated  with  CKD  in  adults  on  chronic  maintenance  dialysis.  In  May  2023,  we  entered  into  a  License  Agreement  with
MEDICE Arzneimiel Püer GmbH & Co. KG, or Medice, pursuant to which we granted Medice an exclusive license to develop and commercialize
vadadustat for the treatment of anemia in paents with CKD in the EEA, the UK, Switzerland and Australia, or the Medice Territory.
In Japan, vadadustat is approved as a treatment for anemia due to CKD in both dialysis dependent and non-dialysis dependent paents under the
trade  name  Vafseo,  and  is  marketed  and  sold  by  our  collaborator  Mitsubishi  Tanabe  Pharma  Corporaon,  or  MTPC.  In  Taiwan,  vadadustat  is
approved  for  the  treatment  of  symptomac  anemia  due  to  CKD  in  adult  paents  on  chronic  maintenance  dialysis  and  in  Korea  as  an  anemia
treatment for paents with CKD on hemodialysis. MTPC plans to commercialize vadadustat in Taiwan.

We connue to pursue approval for vadadustat in the U.S. In September 2023, we completed our resubmission to our New Drug Applicaon, or NDA, for the
treatment of anemia due to CKD in adult paents on dialysis to the U.S. Food and Drug Administraon, or FDA. In October 2023, the FDA acknowledged that
the resubmission was complete, classified it as a Class 2 response and set a user fee goal date, or PDUFA Date, of March 27, 2024.

We inially submied an NDA to the FDA for vadadustat in March of 2021. On March 29, 2022, the FDA issued a complete response leer, or CRL, to our NDA.
The FDA concluded that the data in the NDA did not support a favorable benefit-risk assessment of vadadustat for dialysis and non-dialysis paents. The FDA
expressed safety concerns, nong failure to meet non-inferiority in Major Adverse Cardiovascular Events, or MACE, in the non-dialysis paent populaon, the
increased risk of thromboembolic events driven by vascular access thrombosis in dialysis paents and the risk of drug-induced liver injury. We believe there
are compelling data supporng a posive benefit-risk profile for the use of vadadustat broadly in paents with CKD. In October 2022, we submied a Formal
Dispute  Resoluon  Request,  or  FDRR,  with  the  FDA  regarding  the  CRL  focused  on  the  favorable  balance  of  the  benefits  and  risks  of  vadadustat  for  the
treatment  of  adult  paents  with  anemia  due  to  CKD  on  dialysis.  In  May  2023,  the  Office  of  New  Drugs,  or  OND,  denied  our  appeal  but  provided  a  path
forward  for  us  to  resubmit  the  NDA  for  vadadustat  for  the  treatment  of  anemia  due  to  CKD  for  dialysis  dependent  paents  without  the  need  for  us  to
generate addional clinical data. This led to the NDA resubmission in September 2023.

We own full rights to vadadustat in the U.S., subject to our licensing agreement with Vifor (Internaonal) Ltd. (now a part of CSL Limited), or CSL Vifor. If we
obtain FDA approval for vadadustat as an oral treatment for anemia due to CKD in adult dialysis paents, we plan to commercialize vadadustat in the U.S.
with CSL Vifor. Beyond seeking U.S. approval, we have several lifecycle management and indicaon expansion opportunies currently under evaluaon for
vadadustat, including the potenal for alternave dosing and label expansion for treatment of anemia due to CKD in adult paents not on dialysis.

Our HIF-based pipeline assets are molecules being evaluated to target areas of unmet needs in acute care sengs. The discovery of HIF laid the foundaon to
explore the central role of oxygen sensing in many diseases. As we have seen through the development of vadadustat as a treatment for anemia due to CKD,
when  stabilized,  HIF  triggers  wide-ranging  adapve,  protecve  responses  during  hypoxic  or  ischemic  condions.  We  have  selected  two  addional  HIF
molecules for preclinical development: AKB-9090, for use in an acute care seng, potenally for acute kidney disease, or AKI, or acute respiratory distress
syndrome, or ARDS, and AKB-10108 for renopathy of prematurity, or ROP, in neonates.

We  connue  to  explore  addional  commercial  and  development  opportunies  to  expand  our  pipeline  and  porolio  of  novel  therapeucs  through  both
internal research and external innovaon to leverage our fully integrated team.

Strategy

Our strategic focus and business operaons are driven by our commitment to paents. Our broad understanding of kidney disease helps us serve the unmet
needs  of  kidney  paents  and  others  impacted  by  chronic  and  debilitang  illness.  Our  team  has  extensive  experience  in  developing  and  commercializing
innovave  products,  a  deep  understanding  of  the  renal  space  commercially  as  well  as  the  biological  pathways  involved  in  kidney  disease  and  business
development experse. We are focused on execung on the following four key iniaves:

• Maximize the Value of Auryxia: We connue to use our nephrology-focused commercial organizaon to increase awareness and the demand for
and  adopon  of  Auryxia  for  its  approved  indicaons  with  key  stakeholders  including  nephrologists,  third-party  payors,  dialysis  organizaons  and
paents. Auryxia has contributed consistent, meaningful revenue to the business since it became part of our porolio in 2018. Our goals are to grow
Auryxia net product revenue in 2024 and posion the brand to enable our team to leverage potenal tailwinds which could slow revenue decline
upon loss of exclusivity, or LoE, for Auryxia in March 2025.

• Unlock Significant Value with Potenal U.S. Vadadustat Approval and Commercial Launch Globally: Our near-term goal is to secure approval for
vadadustat as an oral treatment for anemia due to CKD in adult dialysis paents in the U.S., which is the largest market opportunity globally for this
populaon.  We  will  also  connue  to  support  our  partners  in  preparaon  to  launch  Vafseo  in  Europe,  Taiwan  and  potenally  other  countries  to
pursue our goal of

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enabling broad access to vadadustat for paents globally. We own full rights to vadadustat in China, Lan America and certain other territories and
U.S. rights subject to our license agreement with CSL Vifor, which could provide potenal long-term value.

•

•

Advance  pipeline,  with  focus  on  HIF-based  molecules:  As  a  leader  in  HIF  biology,  we  aim  to  thoughully  invest  in  our  pipeline,  including  our
decision  to  advance  two  HIF-based  molecules  for  potenal  use  in  acute  care  sengs  to  the  clinic.  Through  pipeline  advancement,  our  goal  is  to
target new market opportunies in areas of high unmet need.

Explore Strategic Growth: We connue to explore addional commercial and development opportunies to expand our pipeline and porolio of
novel therapeucs through both internal research and external innovaon to leverage our fully integrated team.

In addion to our work to maximize net product revenue, we plan to pursue iniaves to ensure strategic use of capital, most recently securing access to a
term loan with a payback period beyond a potenal launch of vadadustat in the U.S., if approved. We will also connue on our path of financial discipline,
cross-organizaonal efficiency and operaonal effecveness.

Background on Chronic Kidney Disease

There is a clear need to improve the quality of life outcomes for people living with kidney disease. CKD is a condion in which the kidneys are progressively
damaged to the point that they cannot properly filter the blood circulang in the body. This damage causes waste products to build up in the paent’s blood,
leading  to  other  health  problems,  including  anemia,  cardiovascular  disease  and  bone  disease.  In  the  U.S.,  CKD  significantly  impacts  the  U.S.  healthcare
system, potenally affecng about 37 million paents and cosng Medicare nearly $125.0 billion annually for treang Medicare beneficiaries with CKD or
end-stage renal disease, or ESRD, according to the Centers for Disease Control and Prevenon.

The  prevalence  and  incidence  of  CKD  is  increasing  in  all  segments  of  the  U.S.  populaon.  Risk  factors  for  the  development  of  CKD  include  concomitant
diseases such as obesity, hypertension, diabetes mellitus and cardiovascular disease, lifestyle factors such as tobacco use and inacvity, family history, aging
and prenatal factors such as maternal diabetes mellitus, low birth weight and small-for-gestaonal-age status. The progression of CKD towards renal failure is
complicated by mulple condions which further deteriorate kidney funcon and the general health of paents if le untreated. Typically the prevalence of
these condions increases as CKD progresses. For instance, paents with CKD oen experience high phosphorus and develop hyperphosphatemia, which can
result  in  bone  disease,  vascular  calcificaon  and  calciphylaxis  (skin  ulceraon).  Addionally,  anemia,  characterized  by  low  hemoglobin  levels,  is  typically
associated with fague, worsening quality of life, increased hospitalizaons and increased mortality.

Anemia, or low hemoglobin/red blood count, in paents with CKD most commonly arises from two eologies:

1. Anemia due to CKD: results from inadequate levels of erythropoien, or EPO, a protein hormone synthesized by specialized cells in the kidney that
smulates red blood cell, or RBC, producon in the bone marrow. As renal funcon declines, the body progressively loses the ability to produce
endogenous EPO; and

2.

IDA: results from low levels of iron due to abnormal iron absorpon and ulizaon in paents with CKD.

Auryxia

Auryxia is an iron-based, non-calcium, non-chewable, orally-administered tablet approved and marketed in the U.S., Japan and Taiwan for the treatment of
hyperphosphatemia in adult paents with dialysis dependent CKD and for the treatment of IDA in adult paents with NDD-CKD.

Market Opportunity – Hyperphosphatemia and Iron Deficiency Anemia

Hyperphosphatemia  is  a  metabolic  disorder  characterized  by  elevated  serum  phosphorus  levels.  Phosphorus  is  a  vital  element  required  for  most  cellular
processes  and,  in  individuals  with  normal  kidney  funcon,  excess  dietary  phosphorus  is  removed  by  the  kidneys  and  excreted  in  urine.  In  adults  with
funconing kidneys, normal serum phosphorus levels are 2.5 to 4.5 mg/dL. In adults with DD-CKD, elevated phosphorus levels, or hyperphosphatemia, can be
associated with adverse effects, including increased risk for cardiovascular disease, bone disease and death.

Phosphate binders and phosphate inhibitors are the only intervenons marketed for the treatment of hyperphosphatemia. According to the U.S. Renal Data
System  2022  Annual  Data  Report,  there  were  nearly  558,000  paents  in  the  U.S.  on  dialysis  in  2020,  of  which  approximately  80%  were  treated  with  a
phosphate binder. Phosphate binders need to be taken with meals and snacks, and it is not uncommon for DD-CKD paents to be prescribed as many as 12 or
more phosphate binder pills per day, among other medicaons. Paents taking phosphate binders also experience gastrointesnal tolerability issues. As a
result of the pill burden and tolerability issues associated phosphate binders, prescribed phosphate binders are oen intolerable for many paents, leading to
lack of treatment adherence.

In addion, in 2020 approximately 44% of paents treated with a phosphate binder were treated solely with a calcium-based binder, which can lead to side
effects such as increased cardiovascular risk, hypercalcemia and gastrointesnal-related

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adverse events. Due to the risks associated with calcium-based binders, in 2017 Kidney Disease: Improving Global Outcomes, or KDIGO, recommended that
clinicians limit the use of calcium-based binders.

Anemia is a condion characterized by abnormally low levels of hemoglobin. Hemoglobin is contained within RBCs and carries oxygen to other parts of the
body. If there are too few RBCs or if hemoglobin levels are low, the cells in the body will not get enough oxygen. IDA is a common form of anemia that is
caused by paents not having enough iron to manufacture healthy RBCs. Although anyone can develop IDA, IDA is parcularly common in NDD-CKD paents.
IDA is associated with fague, lethargy, decrease quality of life, cardiovascular complicaons, hospitalizaons and increased mortality.

We esmate that there are more than 500,000 adult paents in the U.S. with NDD-CKD diagnosed with IDA and managed by a nephrologist. Currently, there
are two forms of iron therapy used to treat IDA: oral iron supplements and iron delivered via intravenous infusion, or IV, iron. Oral iron is currently the first-
line iron replacement therapy for most physicians; however, oral iron supplements are poorly absorbed by many paents, which may adversely impact their
effecveness, and are associated with certain side effects, such as conspaon, diarrhea and cramping, that may adversely affect treatment adherence. IV
iron is viewed as an effecve treatment; however, like other intravenous medicines, it is logiscally difficult to administer in an office seng, where NDD-CKD
paents are more oen treated.

Commercializaon

We market Auryxia in the U.S. through our well-established, nephrology-focused sales force and commercial organizaon.

Auryxia, as an oral drug, is covered by Medicare under Part D and commercial channels. Paents with hyperphosphatemia have access to Auryxia through the
major Medicare Part D plans and the ten largest commercial plans and pharmacy benefit managers in the U.S., which provide coverage for approximately 127
million people. In September 2018, the Centers for Medicare & Medicaid Services, or CMS, decided that Auryxia would no longer be covered by Medicare for
the treatment of IDA. While this decision does not impact CMS coverage for the treatment of hyperphosphatemia, it requires all Auryxia prescripons for
Medicare paents to undergo a prior authorizaon, or PA, to ensure their use in that indicaon. We decided beginning in 2022 to terminate certain Part D
contracts, as paents no longer had the access benefit given the PA requirement. Now, paents must go through a medical exempon process, which is very
similar to a PA review. While we believe this had, and may connue to have, a negave impact on our overall sales volume, we believe it had a significant
posive impact on our net selling price.

In recognion of the evoluon of chronic kidney care to value-based reimbursement and care delivery, in late 2022 we shied our commercial model to align
to  customer  objecves.  The  team  of  key  account  managers  are  focused  on  high  value  individual  prescribers  that  represent  approximately  70%  of  Auryxia
prescribing and 40% of the overall binder market potenal. The team also focuses on large group pracces that are part of the Comprehensive Kidney Care
Contracng, or CKCC, program. These enes are focused on delivering coordinated, cost-effecve care for advanced CKD paents, including those receiving
dialysis. This customer group requires different clinical and economic raonale for supporng product use in protocols and formularies. Therefore, we have
aligned  key  account  managers  to  these  high-volume,  value-based  care  organizaons.  We  believe  this  model  is  more  aligned  to  our  customers’  needs  and
recognion of our product’s value proposion.

JT and Torii market Riona in Japan. We receive ered double-digit royales from JT and Torii based on their sales in Japan.

Vadadustat

Market Opportunity

Anemia  is  common  in  paents  with  CKD,  and  its  prevalence  increases  with  disease  progression.  Anemia  due  to  CKD  results  from  inadequate  EPO  levels,
negavely affecng RBC producon. Le untreated, anemia accelerates the overall deterioraon of paent health with increased morbidity and mortality.
Based on third-party prevalence data and company esmates, approximately 5.7 million people in the U.S. with CKD suffer from anemia. According to the U.S.
Renal Data System 2022 Annual Data Report, there were nearly 558,000 paents in the U.S. on dialysis in 2020, of which 86% were on in-center hemodialysis
and the remainder on home dialysis, which includes both peritoneal dialysis and home hemodialysis.

The  current  standard  of  care  for  anemia  due  to  CKD  is  treatment  by  injectable  recombinant  human  erythropoiesis-smulang  agents,  or  ESAs,  such  as
Epogen® (epoen alfa), Aranesp® (darbepoen alfa) or Mircera® (methoxy polyethylene glycol-epoen beta), or blood transfusion. Based on publicly available
informaon on ESA sales and market data compiled by a third-party vendor, global sales of injectable ESAs for all uses were esmated to be approximately
$10.0 billion in 2022. The vast majority of these sales are believed to have been for the treatment of anemia due to CKD. In Europe, within the EU5, which
refers to the five largest markets in Europe or France, Germany, Italy, Spain and England, more than 200,000 dialysis paents are diagnosed with anemia due
to CKD and are treated with ESAs.

When administered to a paent, injectable ESAs provide supraphysiological levels of exogenous EPO to smulate producon of RBCs. While injectable ESAs
can be effecve in raising hemoglobin levels, they have the potenal to cause significant side

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effects,  and  need  to  be  injected  subcutaneously  or  intravenously.  In  parcular,  injectable  ESAs  may  lead  to  thrombosis,  stroke,  myocardial  infarcon  and
death. Also, controlled trials have demonstrated that paents experienced greater risk of death, serious adverse cardiovascular reacons, and stroke when
administered ESAs to a target hemoglobin level of greater than 11g/dL. While these safety concerns, which became evident starng in 2006, have led to a
significant reducon in the use of injectable ESAs, and an increase in the use of injectable iron, injectable ESAs remain the current standard of care for the
treatment of anemia due to CKD in paents on dialysis and not dialysis dependent.

We believe there is a significant opportunity for vadadustat to address limitaons of injectable ESAs and become a new oral opon for the treatment of
anemia due to CKD in adult paents on dialysis, if approved. In addion, clinical data from our Phase 3 INNO VATE program showed vadadustat was non-
inferior to darbepoen alfa with respect to hematological efficacy (change in hemoglobin concentraon) and cardiovascular safety (MACE) in adult paents
on dialysis.

2

Injectable ESAs are administered by dialysis center staff to approximately 90% of in-center hemodialysis paents and 75% of home dialysis paents. Although
the significant majority of dialysis paents are cared for in-center, recently, several factors including the COVID-19 pandemic, changing paent preferences,
government iniaves and reimbursement changes are supporng a shi toward home dialysis. We believe as an oral therapeuc, vadadustat has potenal
to be a convenient treatment alternave to injectable ESAs not only for in-center dialysis paents, but also for the growing number of home dialysis paents
and paents transioning to home dialysis.

Given the concentraon of dialysis clinics in large networks, with DaVita, Inc., or DaVita, and Fresenius Kidney Care Group LLC, or Fresenius, accounng for a
vast majority of the dialysis populaon in the U.S., treatment is usually driven by medical protocols that are implemented across the enre network of clinics.
These protocols are informed by very large data sets and when updated, result in rapid change applicable to large segments of the paent populaon. This is
parcularly true of medicaons covered under the ESRD Prospecve Payment System, or PPS, in Medicare, or the ESRD Bundle, a payment structure with a
flat base rate per dialysis session adjusted for individual paent and facility characteriscs. Dialysis-related drugs are included in the ESRD Bundle if they fall
into  funconal  categories  such  as  anemia  management  and  bone  and  mineral  metabolism,  except  that  oral-only  drugs  are  exempted  from  inclusion  unl
2025. In a final ESRD PPS rule published in November 2018, CMS confirmed that it will expand the Transional Drug Add-on Payment Adjustment, or TDAPA,
to all new dialysis drugs approved by the FDA aer January 1, 2020. The TDAPA will provide separate payment for new drugs for two years based on the
drug’s Average Sales Price, or ASP, that will be in addion to the base rate in order to facilitate the adopon of innovave therapies. Although there are
several details that need further clarificaon, and the precise ming of when we could receive codes to allow for reimbursement under TDAPA is not known,
the codes are assigned on a quarterly basis, and the rule provides support for our assumpon that new anemia treatments, including those in the HIF-PH
inhibitor  class,  will  be  included  in  the  ESRD  Bundle  and  will  be  eligible  for  separate  payment  inially  under  TDAPA,  and  we  expect  to  receive  TDAPA
designaon for vadadustat six months post-filing acceptance if approved by the FDA.

Commercializaon

We  are  supporng  MTPC's  commercializaon  of  vadadustat  in  Japan  and  will  support  Medice's  commercializaon  of  vadadustat  in  Europe.  We  are  also
preparing for a potenal commercial launch of vadadustat in the U.S., if approved.

If we obtain FDA approval for vadadustat for the treatment of anemia due to CKD in adult paents, we plan to commercialize vadadustat in the U.S. with CSL
Vifor. Today, we have an established and embedded commercial team with approximately 30 key account managers supported by our commercial operaons
team. There is a more than 96% overlap in call points that exists between Auryxia and vadadustat. Enhancing the ability of our commercial team, we also
have  renal  experse  across  our  organizaon,  including  among  our  leadership  team  and  Board  of  Directors,  as  well  as  exisng  relaonships  with  dialysis
organizaons that we believe will enhance our commercial effecveness if vadadustat is approved.

In February 2022, we entered into a Second Amended and Restated License Agreement, or the Vifor Agreement, with CSL Vifor, under which we granted CSL
Vifor  an  exclusive  license  to  sell  vadadustat  to  Fresenius  Medical  Care  North  America  and  its  affiliates,  including  Fresenius,  to  certain  third-party  dialysis
organizaons  approved  by  us,  to  independent  dialysis  organizaons  that  are  members  of  certain  group  purchasing  organizaons  and  to  certain  non-retail
specialty pharmacies, collecvely, the Supply Group, in the U.S., or Vifor Territory. If approved, we plan to market vadadustat in the U.S., including to the
Supply Group, and we plan to sell vadadustat directly to organizaons outside the Supply Group. During the term of the Vifor Agreement, CSL Vifor is not
permied to sell any HIF product that competes with vadadustat in the Vifor Territory to the Supply Group.

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Clinical Development Program

Below is a summary of the clinical development work undertaken for vadadustat.

Vadadustat Global Phase 3 Clinical Program in Anemia Due To CKD

We conducted a global Phase 3 clinical development program for vadadustat, which included two programs, INNO VATE and PRO TECT. INNO VATE evaluated
vadadustat in adult DD-CKD paents with anemia due to CKD in two studies, and PRO TECT evaluated vadadustat in adult NDD-CKD paents with anemia due
to CKD in two studies. Combined, we enrolled approximately 7,500 paents in these studies and evaluated a once daily oral dosing of vadadustat against an
injectable ESA acve comparator, darbepoen alfa.

2

2

2

2

2

2

2

2

Both the INNO VATE and PRO TECT Phase 3 programs were global, mulcenter, open-label, sponsor-blind, acve-controlled non-inferiority programs. In both
programs, paents were randomized 1:1 to receive either oral vadadustat or injectable darbepoen alfa. The primary efficacy endpoint for each study in the
INNO VATE and PRO TECT programs was the mean change in hemoglobin between baseline and the primary evaluaon period. Non-inferiority, or NI, for the
primary efficacy endpoint was achieved if the lower bound of the 95% confidence interval for the between-group difference of the mean hemoglobin change
did not fall below the pre-specified NI margin. Both the INNO VATE and PRO TECT programs included the primary safety endpoint of the assessment of MACE,
with a comparison of vadadustat to darbepoen alfa. MACE is defined as the composite endpoint of all-cause mortality, non-fatal myocardial infarcon, or
non-fatal stroke. The primary safety analysis for each program was based on the combined MACE events from the two studies in each of INNO VATE and
PRO TECT. NI for the primary safety analysis was achieved if the upper bound of the 95% confidence interval for the hazard rao of vadadustat to darbepoen
alfa  did  not  exceed  the  pre-specified  NI  margin.  We  prospecvely  defined  and  agreed  to  non-inferiority  margins  with  the  U.S.  and  European  regulatory
authories and agreed with the U.S. regulatory authories on the key components of our stascal analysis plan.

2

2

2

2

Top-line Results from Global Phase 3 INNO VATE Program within DD-CKD Adult Paents
2

The  two  INNO VATE  studies  (Correcon/Conversion  and  Conversion),  which  collecvely  enrolled  3,923  paents,  evaluated  the  efficacy  and  safety  of
vadadustat versus darbepoen alfa for the treatment of anemia due to CKD in DD-CKD adult paents.

2

Vadadustat achieved the primary and key secondary efficacy endpoint in each of the two INNO VATE studies, demonstrang non-inferiority to darbepoen
alfa as measured by a mean change in hemoglobin, or Hb, between baseline and the primary evaluaon period (weeks 24 to 36) and secondary evaluaon
period (weeks 40 to 52). Vadadustat also achieved the primary safety endpoint of the INNO VATE program, defined as non-inferiority of vadadustat versus
darbepoen alfa in me to first occurrence of MACE across both INNO VATE studies.

2

2

2

Primary and Key Secondary Efficacy Endpoint Results

Vadadustat achieved each of the INNO VATE studies’ primary efficacy endpoints of mean change in Hb between baseline and the primary evaluaon period
compared to darbepoen alfa, in DD-CKD adult paents, demonstrang non-inferiority to darbepoen alfa based on using a non-inferiority margin of -0.75
g/dL.

2

In INNO VATE’s Correcon/Conversion study of incident dialysis paents (n=369):

2

•

•

Primary Efficacy Endpoint Result: Vadadustat was non-inferior to darbepoen alfa. The least square mean difference in Hb was -0.31 g/dL
(95% CI: -0.53, -0.10), achieving the pre-specified non-inferiority criterion of -0.75 g/dL. The mean (SD) Hb level at week 24 to week 36 was
10.36 (1.13) g/dL for vadadustat-treated paents compared to 10.61 (0.94) g/dL for darbepoen alfa-treated paents.

Key Secondary Efficacy Endpoint Result: Vadadustat sustained the target Hb efficacy response at weeks 40 to 52 achieving non-inferiority
compared to darbepoen alfa. The least square mean difference in Hb was -0.07 g/dL (95% CI: -0.34, 0.19). The mean (SD) Hb level at week
40 to week 52 was 10.51 (1.19) g/dL for vadadustat treated-paents compared to 10.55 (1.14) g/dL for darbepoen alfa-treated paents.

In INNO VATE’s Conversion study of prevalent dialysis paents (n=3,554):

2

•

•

Primary Efficacy Endpoint Result: Vadadustat was non-inferior to darbepoen alfa. The least square mean difference in Hb was -0.17 g/dL
(95% CI: -0.23, -0.10), achieving the pre-specified non-inferiority criterion of -0.75 g/dL. The mean (SD) Hb level at week 24 to week 36 was
10.36 (1.01) g/dL for vadadustat-treated paents compared to 10.53 (0.96) g/dL for darbepoen alfa-treated paents.

Key  Secondary  Efficacy  Endpoint  Result:  Vadadustat  sustained  efficacy  in  the  Conversion  study  demonstrang  non-inferiority  to
darbepoen with a least square mean difference in Hb of -0.18 g/dL (95% CI: -0.25, -0.12). The mean (SD) Hb level at week 40 to week 52
was 10.40 (1.04) g/dL in the vadadustat-treated paents compared to 10.58 (0.98) g/dL for darbepoen treated paents.

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Primary Safety Major Adverse Cardiovascular Events (MACE) Endpoint Result

Vadadustat  achieved  the  INNO VATE  program’s  primary  safety  endpoint  of  non-inferiority  for  MACE.  In  the  primary  analysis  of  me  to  first  MACE  event,
vadadustat demonstrated non-inferiority to darbepoen alfa using a non-inferiority margin of 1.25 based on discussion with the FDA and a non-inferiority
margin of 1.3 based on discussion with the EMA. 

2

The INNO VATE program (Correcon/Conversion and Conversion studies) of dialysis paents (n=3,902):

2

•

Vadadustat was non-inferior to darbepoen alfa. The upper bound of the 95% confidence interval (CI) of the Hazard Rao (HR) was below
the pre-specified non-inferiority margin of 1.25 for primary MACE analysis (HR 0.96, 95% CI: 0.83, 1.11.).

The incidence of treatment emergent adverse events, or TEAEs, during the Correcon/Conversion study in vadadustat treated paents was 83.8% and 85.5 %
in darbepoen alfa treated paents. During the study, the most common TEAEs reported in vadadustat/darbepoen alfa treated paents were hypertension
(16.2%/ 12.9%) and diarrhea (10.1%/ 9.7%). Serious TEAEs were lower in vadadustat treated paents at 49.7% compared to 56.5% for darbepoen alfa
treated paents. The incidence of TEAEs during the Conversion study in the vadadustat treated paents was 88.3%, and 89.3% in darbepoen alfa treated
paents. During the study, the most common TEAEs reported in vadadustat/darbepoen alfa treated paents were diarrhea (13.0%/ 10.1%), pneumonia
(11.0%/ 9.7%), hypertension (10.6%/ 13.8%), and hyperkalemia (9.0%/ 10.8%). Serious TEAEs were slightly lower for vadadustat treated paents at 55.0% and
58.3% for darbepoen alfa-treated paents. Paents with DD-CKD experienced an increased risk of thromboembolic events compared to darbepoen alfa
with a me to first event HR of 1.20 (95% CI 0.96 –- 1.50) driven by thrombosis of vascular access.

2

INNO VATE results on key secondary safety endpoints showed that vadadustat also demonstrated non-inferiority to darbepoen alfa in analyses of expanded
MACE, cardiovascular MACE, cardiovascular mortality, and all-cause mortality.

Top-line Results from Global Phase 3 PRO TECT Program within NDD-CKD Adult Paents

2

The two PRO TECT studies (Correcon  and  Conversion),  which  collecvely  enrolled  3,476  paents,  evaluated  the  efficacy  and  safety  of  vadadustat  for  the
treatment of anemia due to CKD in NDD-CKD adult paents.

2

Vadadustat achieved the primary and key secondary efficacy endpoint in each of the two PRO TECT studies, demonstrang non-inferiority to darbepoen alfa
as measured by a mean change in Hb between baseline and the primary evaluaon period (weeks 24 to 36) and secondary evaluaon period (weeks 40 to
52). Vadadustat did not meet the primary safety endpoint of the PRO TECT program, defined as non-inferiority of vadadustat versus darbepoen alfa in me
to first occurrence of MACE, across both PRO TECT studies.

2

2

2

Primary and Key Secondary Efficacy Endpoint Results

Vadadustat achieved each of the PRO TECT studies' primary efficacy endpoints of mean change in Hb between baseline and the primary evaluaon period
compared to darbepoen alfa, in adult paents on dialysis, demonstrang non-inferiority to darbepoen alfa using an NI margin of -0.75 g/dL.

2

In PRO TECT's Correcon study (n=1,751):

2

•

•

Primary Efficacy Endpoint Result: Vadadustat was non-inferior to darbepoen alfa. The least square mean difference in Hb was 0.05 g/dL
(95% CI: -0.04, 0.15), achieving the pre-specified NI criterion of -0.75 g/dL. The mean (SD) Hb level at week 24 to week 36 was 10.39 (0.99)
g/dL for vadadustat-treated paents compared to 10.35 (1.03) g/dL for darbepoen alfa-treated paents.

Key Secondary Efficacy Endpoint Result: Vadadustat sustained the target Hb efficacy response at weeks 40 to 52 achieving non-inferiority
compared to darbepoen alfa. The least square mean difference in Hb was 0.04 g/dL (95% CI: -0.06, 0.14). The mean (SD) Hb level at week
40 to week 52 was 10.48 (1.05) g/dL for vadadustat-treated paents compared to 10.45 (1.01) g/dL for darbepoen alfa-treated paents.

In PRO TECT's Conversion study (n=1,725):

2

•

•

Primary Efficacy Endpoint Result: Vadadustat was non-inferior to darbepoen alfa. The least square mean difference in Hb was -0.01 g/dL
(95% CI: -0.09, 0.07), achieving the pre-specified NI criterion of -0.75 g/dL. The mean (SD) Hb level at week 24 to week 36 was 10.77 (0.98)
g/dL for vadadustat-treated paents compared to 10.77 (0.99) g/dL for darbepoen alfa-treated paents.

Key  Secondary  Efficacy  Endpoint  Result:  Vadadustat  sustained  efficacy  in  the  Conversion  study  demonstrang  non-inferiority  to
darbepoen with a least square mean difference in Hb of 0.00 g/dL (95% CI: -0.10, 0.09). The mean (SD) Hb level at week 40 to week 52
was 10.80 (1.04) g/dL in the vadadustat-treated paents compared to 10.79 (1.05) g/dL for darbepoen alpha-treated paents.

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Primary Safety Major Adverse Cardiovascular Events (MACE) Endpoint Result

The PRO TECT program (Correcon and Conversion studies) (n=3,471):

2

•

Primary Safety MACE Endpoint Result: Vadadustat did not meet the PRO2TECT program's primary safety endpoint of non-inferiority for
MACE. The upper bound of the 95% confidence interval of the Hazard Rao (HR) was above the pre-specified NI margin of 1.25 for primary
MACE analysis (HR 1.17, 95% CI: 1.01, 1.36).

Analysis  of  MACE  events  conducted  by  Akebia  in  the  PRO TECT  program  revealed  that  the  greater  number  of  MACE  events  observed  among  vadadustat
paents  as  compared  to  the  acve  comparator  was  primarily  related  to  an  excess  of  non-cardiovascular  death  and  death-of-unknown-cause  in  regions
outside of the U.S. where significant differences in treatment paerns for NDD-CKD paents were observed.

2

2

The PRO TECT analysis plan was prospecvely designed to analyze the effect of regional differences, most notably, well-known differences in Hb treatment
targets. Within PRO TECT, U.S. paents were treated to a target Hb range of 10 to 11 g/dL and non-U.S. paents were treated to a target Hb range of 10 to 12
g/dL. In October of 2020, we presented a pre-specified regional analysis that showed vadadustat was not associated with a clinically meaningful increase in
cardiovascular risk compared to darbepoen alfa in U.S. paents treated to a target Hb range of 10 to 11 g/dL, in an analysis of MACE (HR 1.06, 95% CI: 0.87,
1.29).

2

The incidence of TEAEs during the Correcon study in the vadadustat-treated paents was 90.9%, and 91.6% in darbepoen alfa-treated paents. During the
study, the most common TEAEs reported in vadadustat/darbepoen alfa-treated paents were end-stage renal disease (34.7%/ 35.2%), hypertension (17.7%/
22.1.%), hyperkalemia (12.3.%/ 15.6%), urinary tract infecon (12.9%/ 12.0%), diarrhea (13.9%/ 10.0%), peripheral oedema (12.5%/ 10.5%), fall (9.6%/ 10%)
and nausea (10%/ 8.2%). Serious TEAEs were 65.3% for vadadustat-treated paents and 64.5% for darbepoen alfa-treated paents. The incidence of TEAEs
during the Conversion study in vadadustat treated paents was 89.1% and 87.7% in darbepoen alfa-treated paents. During the study, the most common
TEAEs  reported  in  vadadustat/darbepoen  alfa-treated  paents  were  end-stage  renal  disease  (27.5%/  28.4%),  hypertension  (14.4%/  14.8%),  urinary  tract
infecon  (12.2%/  14.5%),  diarrhea  (13.8.%/  8.8.%),  peripheral  oedema  (9.9%/  10.1%)  and  pneumonia  (10.0%/  9.7%).  Serious  TEAEs  were  58.5%  for
vadadustat-treated paents and 56.6% for darbepoen alfa-treated paents.

Hepac Safety Profile of Vadadustat in Clinical Studies

During the conduct of our Phase 3 program our team and hepac experts analyzed hepac cases (unblinded to treatment). Further, following the compleon
of  our  global  Phase  3  clinical  program  for  vadadustat,  there  was  a  review  of  hepac  safety  across  the  vadadustat  clinical  program,  which  included  eight
completed Phase 2 and 3 studies in NDD-CKD paents, 10 completed Phase 1, 2, and 3 studies, and two then-ongoing Phase 3b studies in DD-CKD paents,
and 18 completed studies in healthy subjects (17 Phase 1 and one Phase 3). This review consisted of a blinded re-assessment of hepac events conducted by
a separate panel of hepac experts. While hepatocellular injury aributed to vadadustat was reported in less than 1% of paents, there was one case of
severe hepatocellular injury with jaundice, and we cannot guarantee that similar events will not happen in the future. Addionally, the FDA expressed safety
concerns related to the risk of drug-induced liver injury in the CRL that it issued in March 2022.

Modified Dosing Studies

From May 2020 to January 2023, we also conducted addional studies of vadadustat evaluang a modified approach to a once-daily and three-mes weekly
dosing, including assessment of a vadadustat starng dose based on an individual’s pre-conversion ESA dose prior to study entry and higher traon doses of
vadadustat (up to 1200 mg).

2

The FO CUS study evaluated the efficacy and safety of vadadustat in hemodialysis paents who were converted from a long-acng ESA to three-mes weekly
oral vadadustat dosing for the maintenance treatment of anemia. FO CUS was an open-label, acve-controlled, sponsor-blinded study that evaluated 456
hemodialysis paents who were randomized (1:1:1) into a vadadustat 600mg starng dose, vadadustat 900mg starng dose, or a long-acng ESA (Mircera®)
treatment arms.

2

The MO DIFY study evaluated the efficacy and safety of vadadustat in hemodialysis paents using a modified once-daily dosing regimen different from the
INNO VATE program dosing and a three-mes-weekly dosing regimen of oral vadadustat compared to darbepoen alfa.

2

2

FO CUS Study

2

Primary and Secondary Efficacy Endpoint Results

2

In the FO CUS study, each vadadustat starng dose regimen (600 mg, 900 mg) and the combined vadadustat-treated group achieved the primary efficacy
endpoint  of  the  mean  change  in  Hb  between  baseline  and  the  primary  evaluaon  period  (weeks  20-26)  compared  to  Mircera  in  adult  paents  on
hemodialysis, demonstrang non-inferiority to Mircera based on a non-inferiority margin of -0.75 g/dL. Similarly, each starng dose regimen of vadadustat
and the combined vadadustat-treated

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group achieved the secondary efficacy endpoint of the mean change in Hb between baseline and the secondary evaluaon period (weeks 46-52).

In the FO CUS study in hemodialysis paents (n=456):

2

•

•

Primary Efficacy Endpoint Results: Vadadustat demonstrated non-inferiority to Mircera. The least square mean difference in Hb was -0.43
g/dL (-0.67, -0.20) for the vadadustat 600 mg starng dose group, -0.23 g/dL (-0.46, 0.01) for the vadadustat 900 mg starng dose group,
and -0.33 g/dL (-0.53, -0.13) for the combined vadadustat-treated group, achieving the pre-specified non-inferiority margin of -0.75 g/dL.
The mean Hb level during the primary evaluaon period was 10.11 (0.061) g/dL for the combined vadadustat-treated group compared to
10.41 (0.068) g/dL for Mircera-treated group.

Secondary  Efficacy  Endpoint  Results:  Vadadustat  demonstrated  non-inferiority  to  Mircera.  The  least  square  mean  difference  in  Hb  was
-0.27 g/dL (-0.54, -0.00) for the vadadustat 600 mg starng dose group, -0.38 g/dL (-0.67, -0.10) for the vadadustat 900 mg starng dose
group, and -0.33 g/dL (-0.56, -0.09) for the combined vadadustat-treated group. The mean Hb level during the secondary evaluaon period
was 10.03 (0.066) g/dL for the combined vadadustat-treated group compared to 10.28 (0.076) g/dL for the Mircera-treated group.

Safety Results

2

In the FO CUS study, a total of 78.7% of paents experienced any TEAEs in the combined vadadustat-treated group, and 75.3% experienced any TEAEs in the
Mircera-treated group. The data demonstrated that 44.5% of paents experienced any serious TEAEs in the combined vadadustat-treated group, and 44.7%
of paents experienced any serious TEAEs in the Mircera-treated group. During the study, the most common TEAEs reported in vadadustat-/Mircera- treated
paents were COVID-19 (14.6%/16.0%), diarrhea (12.3%/8.0%) and hyperkalaemia (9.0%/10.7%).

MO DIFY Study

2

Primary and Secondary Efficacy Endpoint Results

2

In the MO DIFY study, the vadadustat once-daily, or QD, treatment (starng dose: 300 or 450 mg) achieved the primary efficacy endpoint of the mean change
in Hb from baseline to the primary evaluaon period (weeks 20-26) compared to darbepoen alfa in adult paents on hemodialysis, demonstrang non-
inferiority to darbepoen alfa based on a non-inferiority margin of -0.75 g/dL. Vadadustat three-mes-weekly, or TIW, treatment (starng dose: 600 or 750)
did not demonstrate noninferiority to darbepoen alfa. Based on a sensivity analysis using the per protocol populaon, both vadadustat dosing regimens
demonstrated noninferiority to darbepoen alfa of the mean change in Hb between baseline and the primary evaluaon period.

Neither dosing regimen of vadadustat achieved the secondary efficacy endpoint of the mean change in Hb between baseline and the secondary evaluaon
period (weeks 46-52).

In the MO DIFY study in hemodialysis paents (n=319):

2

•

•

•

Primary Efficacy Endpoint Results: Vadadustat QD treatment was non-inferior to darbepoen alfa. The least square mean difference in Hb
was -0.27 g/dL (-0.55, 0.01) for the vadadustat QD-treated group, meeng the pre-specified non-inferiority margin of -0.75 g/dL. The least
square mean difference in Hb was -0.53 g/dL (-0.80, -0.25) for the vadadustat TIW-treated group. The mean Hb level during the primary
evaluaon period was 10.23 (1.07) g/dL and 10.02 (0.87) g/dL for the vadadustat QD and vadadustat TIW groups respecvely, compared to
10.45 (0.83) g/dL for the darbepoen alfa group.

Secondary Efficacy Endpoint Results: The secondary efficacy endpoint was the change in average Hb between baseline and the secondary
evaluaon period (Weeks 46 to 52). The least square mean difference in Hb was -0.40 g/dL (-0.79, -0.02) for the vadadustat QD-treated
group  and  -0.42  g/dL  (-0.81,  -0.02)  for  the  vadadustat  TIW-treated  group.  Since  noninferiority  for  the  secondary  efficacy  endpoint  of
vadadustat TIW to darbepoen alfa was not established, no claims of noninferiority were made for the secondary efficacy endpoint.

Other efficacy Endpoint: The proporon of subjects with an average Hb value within the target range (US [10.0 to 11.0 g/dL] and Europe
[10.0 to 12.0 g/dL]) was similar in the vadadustat QD, vadadustat TIW and darbepoen alfa treatment groups during the primary evaluaon
period  (weeks  20  to  26)  (51.0%,  50.7%,  and  54.5%,  respecvely)  and  secondary  evaluaon  period  (weeks  46  to  52)  (50.4%,  48.3%,  and
51.3%, respecvely).

Safety Results

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Among all randomized paents who received at least one dose of the study medicaon (n=317), 84.8% and 84.6% of paents in the vadadustat QD and TIW
groups, respecvely, experienced any TEAEs, compared to 80.6% in the darbepoen alfa group. The data showed that 44.8% of paents in the vadadustat QD
group and 45.2% in the vadadustat TIW group experienced any treatment-emergent serious adverse events, compared to 43.5% of paents in the
darbepoen alfa group. The most commonly reported TEAEs in paents treated with vadadustat QD, vadadustat TIW, and darbepoen alfa were COVID-19
(13.3%, 12.5%, and 13.0% respecvely), diarrhea (13.3%, 14.4%, and 5.6% respecvely), and anemia (7.6%, 10.6%, and 9.3% respecvely).

Pipeline

We connue to add to our pipeline and porolio of novel therapeucs through internal research, discovery and development. We have invested resources to
build out a preclinical porolio and have selected two candidates for further preclinical development: AKB-9090, a drug targeng crical-care indicaons, and
AKB-10108, a drug targeng condions related to premature birth. We intend to explore AKB-9090 for potenal use in AKI and ARDS, and AKB-10108 for
potenal use in ROP.

Acute Kidney Injury (AKI)

AKI  is  a  sudden  decline  in  the  ability  of  the  kidneys  to  work  and  perform  their  normal  funcons.  AKI  occurs  in  20-30%  of  the  approximately  two  million
paents that undergo cardiac surgeries annually and there are no current treatments available for cardiovascular surgery-related AKI.

Stabilizaon  of  HIF  by  prolyl  hydroxylase  inhibion  leads  to  the  release  of  erythropoien,  a  shi  to  anaerobic  metabolism  (glycolysis)  and  decreased
inflammatory responses that collecvely lessen kidney ischemia-reperfusion injury and ameliorate the decline in kidney funcon. Data from our preclinical
studies showed AKB-9090 to be highly acve in lessening the severity of AKI in an animal model of ischemia-reperfusion injury.

Acute Respiratory Distress Syndrome (ARDS)

ARDS is a life-threatening acute form of lung disease characterized by acute bilateral pulmonary edema and severe hypoxemia (low blood oxygen). Despite
improvement in supporve care, a third-party study indicated high hospital mortality rates for paents with ARDS admied to parcipang intensive care
units. The mortality rate among paents with ARDS in the study was: 34.9% with mild ARDS; 40.3% with moderate ARDS and 46.1% with severe ARDS. There
are currently no treatments available for ARDS except for supporve care.

Stabilizaon of HIF by prolyl hydroxylase inhibion leads to the release of erythropoien, increased extracellular adenosine signaling, increased glycolyc
acvity and decreased inflammaon in lung epithelial cells that promote resoluon of the lung injury. Vadadustat lessened the severity of COVID-19
pneumonia in a clinical trial (NCT04478071) and improved outcomes in animal models of acute lung injury. We plan to conduct a trial with vadadustat for the
treatment of ARDS due to suspected aspiraon, pathogen-associated pneumonia, or sepsis in hospitalized paents, which could further validate the
therapeuc approach for HIF stabilizaon in ARDS and provide clinical data to support clinical development of an alternave HIF-based molecule such as AKB-
9090 for ARDS. Based on the data and our strategic business consideraons, we may not pursue vadadustat as a treatment for ARDS.

Renopathy of Prematurity (ROP)

ROP is the leading cause of blindness in preterm infants globally and occurs due to incomplete renal development and abnormal blood vessel growth in the
rena. ROP is caused by the high oxygen therapy used to treat preterm babies, which prevents rena growth. Annually, there are approximately 100,000 new
cases of infant blindness worldwide due to ROP and currently no preventave therapy.

HIF-PH inhibitors can protect the rena by stabilizing HIF, which degrades during hyperoxia, allowing normal renal development and prevenng abnormal
blood vessel growth that can lead to scarring, bleeding, renal detachment and blindness. Data from our preclinical studies of AKB-10108 in mouse and rat
models  of  ROP  showed  significant  improvements  in  renal  development  under  hyperoxic  condions,  as  well  as  significant  reducons  in  abnormal  blood
vessel growth aer returning to normal oxygen levels.

Manufacturing and Supply

Overview

We neither own nor operate, and currently have no plans to own or operate, any manufacturing or distribuon facilies. We rely on third-party contract
manufacturing organizaons, or CMOs, to produce all of our preclinical, clinical and commercial supply, and third-party distributors to distribute Auryxia. We
have  established  relaonships  with  several  CMOs  and  expect  to  connue  to  rely  on  either  exisng  or  alternave  distributors  and  CMOs  to  distribute  our
products and supply our ongoing and planned preclinical studies and clinical trials and for commercial producon. Our CMOs have other clients and may have
other priories that could affect their ability to perform the work sasfactorily and/or on a mely basis. Both of these occurrences

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would  be  beyond  our  control.  All  clinical  and  commercial  supplies  are  manufactured  under  current  Good  Manufacturing  Pracces,  or  cGMPs,  which  is  a
regulatory standard for the producon of pharmaceucals that will be used in humans.

Vadadustat

We  currently  rely  on  a  single-source  supplier  for  the  direct  manufacture  of  our  drug  substance  and  drug  product  for  clinical  and  commercial  supply  of
vadadustat. We have entered into supply agreements with STA Pharmaceucal Hong Kong Limited, or STA, for the manufacture of vadadustat drug substance
and drug product for commercial use. We plan to migate potenal commercial supply risks for vadadustat, if any, through inventory management and we
may enter into addional manufacturing arrangements for both drug substance and drug product if vadadustat is approved in the U.S.

Vadadustat  is  a  small  molecule.  The  synthesis  of  vadadustat  is  reliable  and  reproducible  from  starng  materials  available  from  mulple  sources  at
commercially relevant scale using no unusual manufacturing equipment. Vadadustat can be formulated into compressed tablets using proprietary processes.
As with any supply program, obtaining raw materials and finished drug product of the required quality and quanty cannot be guaranteed, and we cannot
ensure that we will be successful in this endeavor.

Auryxia

The acve pharmaceucal ingredient of Auryxia, ferric citrate, is a small molecule. The synthesis of ferric citrate is reliable and reproducible from starng
materials  available  from  mulple  sources  at  commercially  relevant  scale.  Ferric  citrate  can  be  formulated  into  compressed  tablets  using  proprietary
manufacturing  processes.  As  with  any  supply  program,  obtaining  raw  materials  and  finished  drug  product  of  the  required  quality  and  quanty  cannot  be
guaranteed, and we cannot ensure that we will be successful in this endeavor.

We ulize third pares for the commercial distribuon of Auryxia, including wholesale distributors and certain specialty pharmacy providers. We have also
engaged Cardinal Health as the exclusive third-party logiscs distribuon agent for commercial sales of Auryxia. The third-party logiscs provides services to
the Company that include storage, distribuon, processing product returns, customer service support, logiscs support, electronic data interface and system
access support

We have established CMO relaonships for the supply of Auryxia to help ensure that we will have sufficient material for ongoing commercial sales and clinical
trials.  We  currently  rely  on  a  single-source  supplier  for  the  manufacture  of  our  drug  substance  for  clinical  and  commercial  supply  of  Auryxia.  The  drug
substance for Auryxia is supplied by Siegfried Evionnaz SA, pursuant to a supply agreement, as amended, with pricing structured on a per-kilogram basis.
Auryxia drug product is supplied by Patheon Manufacturing Services LLC (Thermo Fisher) pursuant to a Master Manufacturing Service Agreement with per-
bole  pricing  structured  on  a  ered  basis,  with  the  price  reduced  as  the  product  volume  increases.  These  agreements  require  that  we  sasfy  certain
minimum  purchase  requirements,  but  we  are  not  obligated  to  use  them  as  our  exclusive  suppliers.  For  more  informaon  about  our  manufacturing
agreements  for  Auryxia,  see  Part  II,  Item  7.  Management’s  Discussion  and  Analysis  and  Note  10,  Commitments  and  Conngencies,  to  our  consolidated
financial statements in Part II, Item 8. Financial Statements and Supplementary Data.

License and Collaboraon Agreements

Vadadustat License and Collaboraon Agreements

Medice License Agreement

On May 24, 2023, or the Medice Effecve Date, we entered into the Medice License Agreement with Medice, under which we granted to Medice an exclusive
license to develop and commercialize vadadustat for the treatment of anemia in adult paents with chronic kidney disease in the Medice Territory.

Under the Medice License Agreement, we received an up-front payment of $10.0 million and are eligible to receive the following payments:

(i)     commercial milestone payments up to an aggregate of $100.0 million, and

(ii)     ered royales ranging from 10% to 30% of Medice's annual net sales of vadadustat in the Medice Territory, subject to reducon in certain

circumstances.

The royales will expire on a country-by-country basis upon the latest to occur of (i) the date of expiraon of the last-to-expire valid claim of ours, Medice or
joint patent that covers vadadustat in such country in the Medice Territory, (ii) the date of expiraon of data or regulatory exclusivity for vadadustat in such
country in the Medice Territory and (iii) the date that is 12 years from first commercial sale of vadadustat in such country in the Medice Territory.

Under the Medice License Agreement, we retain the right to develop vadadustat for non-dialysis paents with anemia due to chronic kidney disease in the
Medice  Territory.  If  we  develop  vadadustat  for  non-dialysis  paents  and  vadadustat  receives  markeng  approval  for  non-dialysis  paents  in  the  Medice
Territory, Medice will commercialize vadadustat for both

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indicaons in the Medice Territory. In this instance, we would receive 70% of the net product margin of any sales of vadadustat in the non-dialysis paent
populaon, unless Medice requests to share the cost of the development necessary to gain approval to market vadadustat for non-dialysis paents in the
Medice Territory and the pares agree on alternave financial terms.

We and Medice established a joint steering commiee to oversee the development and commercializaon of vadadustat in the Medice Territory.

The Medice License Agreement expires on the date of expiraon of all payment obligaons due thereunder with respect to vadadustat in the last country in
the Medice Territory, unless earlier terminated in accordance with the terms of the Medice License Agreement. Either party may, subject to a cure period,
terminate the Medice License Agreement in the event of the other party's uncured material breach. Medice has the right to terminate the Medice License
Agreement in its enrety for convenience upon twelve months' prior wrien noce delivered on or aer the date that is twelve months aer the Medice
Effecve Date.

The  Medice  License  Agreement  includes  customary  terms  relang  to,  among  others,  indemnificaon,  confidenality,  remedies,  and  representaons  and
warranes. The Medice License Agreement provides that we and Medice will enter into a supply agreement pursuant to which we will supply vadadustat to
Medice for commercial use in the Medice Territory. We are currently negoang the terms of the supply agreement with Medice.

MTPC Collaboraon Agreement

In December 2015, we entered into a collaboraon agreement with MTPC, as amended, or the MTPC Agreement, providing MTPC with exclusive
development and commercializaon rights to vadadustat in Japan and certain other Asian countries, or the MTPC Territory. In addion, we supply vadadustat
to MTPC for both clinical and commercial use in the MTPC Territory, subject to MTPC’s opon to manufacture commercial drug product in the MTPC Territory.
On July 15, 2020, we entered into a supply agreement with MTPC for the commercial supply of vadadustat for use in Japan and certain other Asian countries,
as contemplated by the MTPC Agreement, which was amended effecve as of December 5, 2022.

Unless earlier terminated, the MTPC Agreement will connue in effect on a country-by-country basis unl the later of the following: (i) expiraon of the last-
to-expire patent covering vadadustat in such country in the MTPC Territory; (ii) expiraon of markeng or regulatory exclusivity in such country in the MTPC
Territory; or (iii) ten years aer the first commercial sale of vadadustat in such country in the MTPC Territory. MTPC may terminate the MTPC Agreement upon
twelve months’ noce. Either party may terminate the MTPC Agreement upon the material breach of the other party that is not cured within a specified me
period or upon the insolvency of the other party.

Under the terms of the MTPC Agreement, we are eligible to receive payments from MTPC of up to approximately $225.0 million in the aggregate based on
the achievement of certain development, regulatory and sales milestones, as well as ered royalty payments ranging from 13% to 20% on annual net sales of
vadadustat in the MTPC Territory, subject to reducon upon launch of a generic product on a country-by-country basis.

In February 2021, we entered into a royalty interest acquision agreement with HealthCare Royalty Partners IV, L.P., or HCR, whereby we sold our right to
receive royales and sales milestones for vadadustat in Japan and certain other Asian countries in the MTPC territory under the MTPC Agreement, subject to
certain caps and other terms and condions. For more informaon on our royalty interest acquision agreement with HCR, see Note 8, Deferred Revenue,
Refund  Liability  and  Liability  Related  to  Sale  of  Future  Royales,  to  our  consolidated  financial  statements  in  Part  II,  Item  8.  Financial  Statements  and
Supplementary Data of this Form 10-K.

CSL Vifor License Agreement

The  Vifor  Agreement  grants  CSL  Vifor  an  exclusive  license  to  sell  vadadustat  to  the  Supply  Group  in  the  Vifor  Territory.  We  currently  retain  rights  to
commercialize vadadustat for use in the non-dialysis dependent CKD market, to market vadadustat to the Supply Group and to market and sell to dialysis
organizaons outside of the Supply Group. During the term of the Vifor Agreement, CSL Vifor is not permied to sell any HIF product that competes with
vadadustat in the Vifor Territory to the Supply Group. The Vifor Agreement provides that we will enter into a commercial supply agreement with CSL Vifor for
vadadustat  pursuant  to  which  we  will  supply  all  of  CSL  Vifor’s  requirements  for  vadadustat  in  the  Vifor  Territory.  We  have  not  yet  entered  into  a  supply
agreement with CSL Vifor.

The Vifor Agreement is structured as a profit share arrangement between us and CSL Vifor in which we will receive approximately 66% of the profit, net of
certain pre-specified costs. In connecon with the amendment and restatement of the Vifor Agreement in February 2022, CSL Vifor made an upfront payment
to  us  of  $25.0  million.  In  addion,  we  entered  into  certain  investment  agreements  with  CSL  Vifor,  pursuant  to  which  we  sold  CSL  Vifor  an  aggregate  of
7,571,429 shares of our common stock for a total of $70.0 million. The shares have not been registered pursuant to the Securies Act of 1933, as amended, or
the Securies Act, and were issued and sold in reliance upon the exempon from registraon contained in

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Secon 4(a)(2) of the Securies Act and Rule 506 promulgated thereunder as the transacon did not involve any public offering within the meaning of Secon
4(a)(2) of the Securies Act. Finally, CSL Vifor contributed $40.0 million to a working capital facility, or Working Capital Fund, established to parally fund our
costs of purchasing vadadustat from our contract manufacturers. The amount available under the Working Capital Fund is reviewed at specified intervals and
is  adjusted  based  on  a  number  of  factors  including  outstanding  supply  commitments  for  vadadustat  for  the  Vifor  Territory  and  agreed  upon  vadadustat
inventory levels held by us for the Vifor Territory. Addionally, upon terminaon or expiraon of the Vifor Agreement for any reason other than convenience
by CSL Vifor (including following receipt of the CRL for vadadustat), we will be required to refund the outstanding balance of the Working Capital Fund on the
date of terminaon or expiraon.

Unless earlier terminated, the Vifor Agreement will expire upon the later of the expiraon of all patents that claim or cover vadadustat or the expiraon of
markeng or regulatory exclusivity for vadadustat in the Vifor Territory. CSL Vifor may terminate the Vifor Agreement in its enrety upon 30 months’ prior
wrien noce aer the first anniversary of the receipt of regulatory approval, if approved, from the FDA for vadadustat for dialysis-dependent CKD paents.
We may terminate the Vifor Agreement in its enrety for convenience, following the earlier of a certain period of me elapsing or following certain specified
regulatory events, and upon six months’ prior wrien noce. If we terminate for convenience, subject to a specified excepon, we will pay a terminaon fee
to CSL Vifor. In addion, either party may, subject to a cure period, terminate the Vifor Agreement in the event of the other party’s uncured material breach
or bankruptcy. We may also terminate the Vifor Agreement upon the occurrence of certain other events.

Auryxia License and Collaboraon Agreements

Averoa License Agreement

On December 22, 2022, we and Averoa entered into a license agreement, or Averoa License Agreement, pursuant to which we granted to Averoa an exclusive
license to develop and commercialize ferric citrate, or Averoa Licensed Product, in the EEA, Turkey, Switzerland and the United Kingdom, or Averoa Territory.
We and Averoa have established a joint steering commiee to oversee the development, manufacturing and commercializaon of the Averoa Licensed
Product in the Averoa Territory. We expect Averoa will apply for markeng authorizaon for ferric citrate in Europe.

Under the Averoa License Agreement, we are entled to receive ered, escalang royales ranging from a mid-single digit percentage to a low double-digit
percentage of Averoa's annual net sales of the Averoa Licensed Product in the Averoa Territory, including certain minimum royalty amounts in certain years,
and subject to reducon in certain circumstances. The royales will expire on a country-by-country basis upon the last to occur of (a) ten years following the
date of first commercial sale of the Licensed Product in such country; (b) expiraon of the last valid claim of our patent rights and joint patent rights in such
country; and (c) the date of expiraon of the data, regulatory, or markeng exclusivity period conferred by the applicable regulatory authority in such country
with respect to the Licensed Product. We have not received royales from Averoa. As of December 31, 2023, we have not received any consideraon under
this agreement.

The Averoa License Agreement expires on the date of expiraon of all royalty obligaons due thereunder with respect to the Averoa Licensed Product on a
country-by-country basis in the Averoa Territory, unless earlier terminated in accordance with the Averoa License Agreement.

The Averoa License Agreement provides that we and Averoa will enter into a supply agreement pursuant to which we will supply the Averoa Licensed Product
to Averoa for commercial use in the Averoa Territory. We will have the right to terminate the supply agreement upon twenty-four months' noce. We have
not yet entered into a supply agreement with Averoa.

Sublicense Agreement with Japan Tobacco Inc. and Torii Pharmaceucal Co., Ltd.

In  September  2007,  we  entered  into  a  Sublicense  Agreement  with  JT  and  Torii,  under  which  JT  and  Torii  obtained  the  exclusive  sublicense  rights  for  the
development and commercializaon of ferric citrate in Japan. Effecve June 8, 2009, we entered into an Amended and Restated Sublicense Agreement, which
was amended in June 2013, or the Revised Agreement, with JT and Torii.

In January 2014, JT and Torii received manufacturing and markeng approval of ferric citrate from the Japanese Ministry of Health, Labour and Welfare. Ferric
citrate hydrate, which launched in May 2014 and is being marketed in Japan by Torii under the brand name Riona, is indicated as an oral treatment for the
improvement of hyperphosphatemia in paents with CKD, including NDD-CKD and DD-CKD. In July 2019, JT and Torii, reported posive top-line results from a
pivotal Phase 3 comparave study evaluang Riona for the treatment of IDA in adult paents in Japan, which was approved in March 2021. In May 2020, JT
and Torii filed an applicaon for approval of IDA as an addional indicaon for Riona in Japan. Under the terms of the Revised Agreement with JT and Torii, we
are eligible to receive royalty payments based on a ered low double-digit percentage of net sales of Riona in Japan inclusive of amounts that we must pay to
Panion on JT and Torii’s net sales of Riona under the Panion Amended License Agreement, subject to certain reducons upon expiraon or terminaon of the
Panion Amended License Agreement, and may also receive up to an addional $55.0 million upon the achievement of certain annual

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net sales milestones. We recorded $5.4 million in license revenue related to royales earned on net sales of Riona in Japan during the twelve months ended
December 31, 2023.

The  sublicense  under  the  Revised  Agreement  terminates  upon  the  expiraon  of  all  underlying  patent  rights.  Also,  JT  and  Torii  may  terminate  the  Revised
Agreement with or without cause upon at least six months prior wrien noce to us. Addionally, either party may terminate the Revised Agreement for
cause upon 60 days’ prior wrien noce aer the breach of any uncured material provision of the Revised Agreement, or aer certain insolvency events.

License Agreement with Panion & BF Biotech, Inc. for Which We Currently Pay Royales

On April 17, 2019, we and Panion & BF Biotech, Inc., or Panion, entered into a second amended and restated license agreement, or the Panion Amended
License Agreement, which amended and restated in full the license agreement between us and Panion. The Panion Amended License Agreement provides us
with an exclusive license under Panion-owned know-how and patents covering the rights to sublicense, develop, make, use, sell, offer for sale, import and
export  ferric  citrate  worldwide,  excluding  certain  Asian  Pacific  counes,  or  the  Licensor Territory.  The  Panion  Amended  License  Agreement  also  provides
Panion with an exclusive license under our patents covering the rights to sublicense (with our wrien consent), develop, make, use, sell, offer for sale, import
and  export  ferric  citrate  in  certain  countries  in  the  Licensor  Territory.  Consistent  with  the  Panion  License  Agreement,  under  the  Panion  Amended  License
Agreement, Panion is eligible to receive from us or any sublicensee royalty payments based on a mid-single digit percentage of net sales of ferric citrate in our
licensed territories. We are eligible to receive from Panion or any sublicensee royalty payments based on a mid-single digit percentage of net sales of ferric
citrate in Panion’s licensed territories.

The Panion Amended License Agreement terminates upon the expiraon of each of our and Panion’s obligaons to pay royales thereunder. In addion, we
may terminate the Panion Amended License Agreement (i) in its enrety or (ii) with respect to one or more countries in our licensed territory, in either case
upon 90 days’ noce. We and Panion also each have the right to terminate the Panion Amended License Agreement upon the occurrence of a material breach
of the Panion Amended License Agreement by the other party, subject to certain cure provisions, or certain insolvency events. The Panion Amended License
Agreement also provides that, on a country-by-country basis, during the term and unl the second anniversary of the expiraon of our or Panion’s obligaon,
as applicable, to pay royales in a country in which such party has ferric citrate for sale on the date of such expiraon, neither the other party nor its affiliates
will, directly or indirectly, sell, distribute or otherwise commercialize or supply or cause to supply ferric citrate to a third party for sale or distribuon in such
country. In addion, the Panion Amended License Agreement provides that each of us and Panion has the right, but not the obligaon, to conduct ligaon
against any infringer of certain patent rights under the Panion Amended License Agreement in certain territories.

During the year ended December 31, 2023, we recorded $10.0 million in royales due to Panion relang to the sales of Auryxia in the U.S. and JT and Torii net
sales of Riona in Japan.

Cyclerion Therapeucs License Agreement

In June 2021, we entered into the Cyclerion Agreement with Cyclerion Therapeucs, Inc., or Cyclerion, under which Cyclerion granted us an exclusive global
license under certain intellectual property rights to research, develop and commercialize praliciguat, an invesgaonal oral soluble guanylate cyclase, or sGC,
smulator.

Under the terms of the Cyclerion Agreement, we paid $3.0 million in cash upfront to Cyclerion and expensed the amount to research and development, or
R&D, expense in June 2021. In addion, Cyclerion is eligible to receive up to an aggregate of $222.0 million from us in specified development and regulatory
milestone payments on a product-by-product basis. Cyclerion will also be eligible to receive specified commercial milestones as well as ered royales ranging
from a mid-single-digit to mid-teen percentage of net sales, on a product-by-product basis, and subject to reducon upon expiraon of patent rights or the
launch of a generic product in the territory.

Unless earlier terminated, the Cyclerion Agreement will expire on a product-by-product and country-by-country basis upon the expiraon of the last royalty
term, which ends upon the longest of (i) the expiraon of the patents licensed under the Cyclerion Agreement, (ii) the expiraon of regulatory exclusivity for
such product and (iii) 10 years from first commercial sale of such product. We may terminate the Cyclerion Agreement in its enrety or only with respect to a
parcular licensed compound or product upon 180 days' prior wrien noce to Cyclerion. We and Cyclerion also have customary terminaon rights, subject
to a cure period, in the event of the other party’s material breach of the Cyclerion Agreement or in the event of certain addional circumstances.

Intellectual Property

The proprietary nature of, and protecon for, our products, product candidates and our discovery programs, processes and know-how are important to our
business. Our policy is to seek to protect our proprietary posion by, among other methods, filing patent applicaons related to our proprietary technology,
invenons and improvements that are important to the

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development and implementaon of our business. We also rely on know-how, connuing technological innovaon and potenal in-licensing opportunies to
develop and maintain our proprietary posion. Addionally, we may benefit from a variety of statutory frameworks in the U.S., Europe and other countries
that provide periods of non-patent-based exclusivity for qualifying molecules. 

Our commercial success will depend in part on obtaining and maintaining patent protecon of our current products as well as current and future product
candidates, methods of their use and the methods used to develop and manufacture them, as well as successfully defending these patents against third-party
challenges. Our ability to stop third pares from making, using, selling, offering to sell or imporng our products depends on the extent to which we have
rights under valid and enforceable patents that cover these acvies. We cannot be sure that patents will be granted with respect to any of our pending
patent applicaons or with respect to any patent applicaons filed by us in the future, nor can we be sure that any of our exisng patents or any patents that
may be granted to us in the future will be commercially useful in protecng our product candidates, discovery programs and processes. Even once patents
successfully issue, third pares may challenge the validity, enforceability, inventorship, or scope thereof, which may result in such patents being narrowed,
invalidated or held not infringed or unenforceable. For this and more comprehensive risks related to our intellectual property, please see “Risk Factors—Risks
Related to our Intellectual Property” in Part I, Item 1A. Risk Factors.

Individual patents extend for varying periods of me depending on the date of filing of the patent applicaon or the date of patent issuance and the legal
term of patents in the countries in which they are obtained. Generally, patents issued from applicaons filed in the U.S. are effecve for 20 years from the
earliest  filing  date  of  a  U.S.  non-provisional  applicaon  or  an  internaonal  applicaon  filed  under  the  Patent  Cooperaon  Treaty.  In  addion,  in  certain
instances, a patent term can be extended to recapture a poron of the term effecvely lost as a result of the FDA regulatory review period, however, the
restoraon  period  cannot  be  longer  than  five  years  and  the  total  patent  term  including  the  restoraon  period  must  not  exceed  14  years  following  FDA
approval.  The  duraon  of  foreign  patents  varies  in  accordance  with  provisions  of  applicable  local  law,  but  typically  is  also  20  years  from  the  earliest
internaonal filing date. Patent term recapture for loss of term as a result of the regulatory review period is available in some foreign jurisdicons. In the U.S.,
a  patent’s  term  may  also  be  lengthened  by  patent  term  adjustment,  which  compensates  a  patentee  for  administrave  delays  by  the  U.S.  Patent  and
Trademark Office, or USPTO, in granng a patent, or may be shortened if a patent is terminally disclaimed over an earlier-filed patent.

Changes in either the patent laws or interpretaons of patent laws in the U.S. and other countries can diminish our ability to protect our invenons and
enforce our intellectual property rights. Accordingly, we cannot predict the breadth or enforceability of claims that may be granted in our patents or in third-
party patents. The biotechnology and pharmaceucal industries are characterized by extensive ligaon regarding patents and other intellectual property
rights. Our ability to maintain and solidify our proprietary posion for our drugs and technology will depend on our success in obtaining effecve claims and
enforcing those claims once granted. We do not know whether any of the patent applicaons that we may file or license from third pares will result in the
issuance of any patents. The issued patents that we own or license or may receive or acquire in the future may be challenged, invalidated or circumvented,
and the rights granted under any issued patents may not provide us with sufficient protecon or compeve advantages against competors with similar
technology.  Furthermore,  our  competors  may  be  able  to  independently  develop  and  commercialize  similar  drugs  or  duplicate  our  technology,  business
model or strategy without infringing our patents. Because of the extensive me required for clinical development and regulatory review of a drug we may
develop, it is possible that, before any of our drugs can be commercialized, any related patent may expire or remain in force for only a short period following
commercializaon, thereby reducing any advantage of any such patent. The patent posions for vadadustat and Auryxia are summarized below.

Vadadustat Patent Porolio

We  hold  19  issued  patents  covering  the  composion  of  maer,  polymorph,  method  of  treang  anemia,  pharmaceucal  composions  of  vadadustat,  and
processes for manufacturing vadadustat in the U.S. and addional patents issued or pending in many other major jurisdicons worldwide, including Europe,
Japan,  China,  South  Korea,  Brazil,  Mexico,  Russia,  Israel  and  India.  The  expected  expiraon  dates  for  these  patents  are  between  2027  and  2039  plus  any
extensions or adjustments of term available under naonal law.

We  also  hold  patents  and  patent  applicaons  directed  to  starng  materials  and  intermediates  in  the  processes  for  manufacturing  vadadustat,  dosing
regimens, formulaons and various other aspects relang to the treatment of anemia using vadadustat that are expected to expire between 2032 and 2042
exclusive of possible patent term extensions or adjustments.

We have ongoing opposion proceedings relang to vadadustat. See Part I, Item 3. Legal Proceedings for further informaon relang to these maers.

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Auryxia Patent Porolio

Pursuant to the Panion Amended License Agreement, we have the exclusive rights under a series of patents and patent applicaons to commercialize Auryxia
worldwide, excluding certain Asian-Pacific countries. These patents and patent applicaons include claims directed to composions of maer, pharmaceucal
composions, methods of treatment, as well as methods for the manufacture of Auryxia.

Our patent rights include 14 issued U.S. patents listed in the Orange Book covering the composion of maer, method of treang hyperphosphatemia, and
pharmaceucal  composions  of  Auryxia.  The  expected  expiraon  dates  for  these  patents  are  between  2024  and  2030  plus  any  addional  patent  term
extensions that may be available. 

Pursuant to the sublicense with our Japanese partner, Japan Tobacco Inc., or JT, and its subsidiary, Torii Pharmaceucal Co. Ltd., or Torii, we have exclusively
sublicensed certain Japanese patent rights to JT and Torii. These sublicensed rights include several Japanese patents and pending patent applicaons with
composion of maer claims, methods of synthesizing claims, and methods of use claims covering Riona, the trade name under which JT and Torii market
ferric  citrate  in  Japan.  The  expected  expiraon  dates  for  these  patents  and  pending  patent  applicaons  are  between  2025  and  2028.  To  date,  to  our
knowledge, no contested proceedings or third-party claims have been lodged against any of these Japanese patents.

Pursuant to the sublicense with our European partner, Averoa, we have exclusively sublicensed certain European patent rights to Averoa. These sublicensed
rights include several European patents and pending patent applicaons with composion of maer claims and methods of use claims covering ferric citrate.
The  expected  expiraon  dates  for  these  patents  and  pending  patent  applicaons  are  between  2024  and  2036.  To  date,  to  our  knowledge,  no  contested
proceedings or third-party claims have been lodged against any of these European patents.

We received Paragraph IV cerficaon noce leers regarding abbreviated new drug applicaons, or ANDAs, submied to the FDA by third pares requesng
approval for generic versions of Auryxia tablets (210 mg ferric iron per tablet). In response we filed certain complaints for patent infringement against six third
pares, and have entered into selement and license agreements with each of the six ANDA filers. Each selement agreement granted the defendants a
license  to  market  a  generic  version  of  Auryxia  in  the  U.S.  beginning  on  March  20,  2025  (subject  to  FDA  approval),  or  earlier  under  certain  circumstances
customary for selement agreements of this nature.

Other Intellectual Property Rights

We depend upon trademarks, trade secrets, know-how and connuing technological advances to develop and maintain our compeve posion. To maintain
the  confidenality  of  trade  secrets  and  proprietary  informaon,  we  require  our  employees,  scienfic  advisors,  consultants  and  collaborators,  upon
commencement  of  a  relaonship  with  us,  to  execute  confidenality  agreements  and,  in  the  case  of  pares  other  than  our  research  and  development
collaborators, to agree to assign their invenons to us. These agreements are designed to protect our proprietary informaon and to grant us ownership of
technologies that are developed in connecon with their relaonship with us. These agreements may not, however, provide protecon for our trade secrets
in the event of unauthorized disclosure of such informaon.

In addion to patent protecon, we may ulize orphan drug regulaons, pediatric exclusivity or other provisions of the Food, Drug and Cosmec Act of 1938,
as amended, or FDCA, such as new chemical enty exclusivity or new formulaon exclusivity, to provide market exclusivity for a product candidate. In the
U.S., the FDA has the authority to grant addional data protecon for approved drugs where the sponsor conducts specified tesng in pediatric or adolescent
populaons. If granted, this pediatric exclusivity may provide an addional six months which are added to the term of data protecon as well as to the term
of a relevant patent, to the extent these protecons have not already expired. We may also seek to ulize market exclusivies in other territories. We cannot
assure you that our products or any product candidates we may acquire or in-license, will obtain such orphan drug designaon, pediatric exclusivity, new
chemical enty exclusivity or any other market exclusivity in the U.S., European Union, or EU, or any other territory, or that we will be the first to receive the
respecve regulatory approval for such drugs so as to be eligible for any market exclusivity protecon.

Know-How

In addion to patents, we rely upon unpatented know-how and connuing technological innovaon to develop and maintain our compeve posion. We
seek  to  protect  our  proprietary  informaon,  in  part,  using  confidenality  agreements  with  our  collaborators,  employees  and  consultants  and  invenon
assignment provisions in the confidenality agreements with our employees. These agreements are designed to protect our proprietary informaon and, in
the  case  of  the  invenon  assignment  provisions,  to  grant  us  ownership  of  technologies  that  are  developed  by  our  employees.  These  agreements  may  be
breached, and we may not have adequate remedies for any breach.

To the extent that our commercial partners, collaborators, employees and consultants use intellectual property owned by others in their work for us, disputes
may arise as to the rights in related or resulng know-how and invenons.

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The Hatch-Waxman Act

Orange Book Lisng

In  seeking  approval  for  a  drug  through  an  NDA,  sponsors  are  required  to  list  with  the  FDA  each  patent  whose  claims  cover  the  sponsor’s  product.  Upon
approval  of  a  drug,  each  of  the  patents  listed  in  the  applicaon  for  the  drug  is  then  published  in  the  FDA’s  Approved  Drug  Products  with  Therapeuc
Equivalence Evaluaons, commonly known as the Orange Book. Drugs listed in the Orange Book can, in turn, be cited by potenal generic competors in
support of approval of an ANDA. An ANDA provides for markeng of a drug product that has the same acve ingredients in the same strengths and dosage
form as the listed drug and has been shown through bioequivalence tesng to be therapeucally equivalent to the listed drug. Other than the requirement
for  bioequivalence  tesng,  ANDA  sponsors  are  usually  not  required  to  conduct,  or  submit  results  of,  nonclinical  or  clinical  tests  to  prove  the  safety  or
effecveness  of  their  drug  product.  Drugs  approved  in  this  way  are  commonly  referred  to  as  “generic  equivalents”  to  the  listed  drug  and  can  oen  be
substuted by pharmacists under prescripons wrien for the original listed drug.

The ANDA sponsor is required to make certain cerficaons to the FDA concerning any patents listed for the approved product in the FDA’s Orange Book.
Specifically, the sponsor must cerfy that: (i) the required patent informaon has not been filed; (ii) the listed patent has expired; (iii) the listed patent has not
expired but will expire on a parcular date and approval is sought aer patent expiraon; or (iv) the listed patent is invalid or will not be infringed by the new
product.  The  ANDA  sponsor  may  also  elect  to  submit  a  Secon  viii  statement,  cerfying  that  its  proposed  ANDA  label  does  not  contain  or  carve  out  any
language regarding the patented method-of-use, rather than cerfy to a listed method-of-use patent.

If the sponsor does not challenge the listed patents, the ANDA will not be approved unl all the listed patents claiming the referenced product have expired. A
cerficaon that the new product will not infringe the already approved product’s listed patents, or that such patents are invalid, is called a Paragraph IV
cerficaon. If the ANDA sponsor has provided a Paragraph IV cerficaon to the FDA, the sponsor must also send noce of the Paragraph IV cerficaon to
the NDA and patent holders once the ANDA has been accepted for filing by the FDA. The NDA and patent holders may then iniate a patent infringement
lawsuit in response to the noce of the Paragraph IV cerficaon. The filing of a patent infringement lawsuit within 45 days of the receipt of a Paragraph IV
cerficaon automacally prevents the FDA from approving the ANDA unl the earlier of 30 months from receiving the Paragraph IV cerficaon, expiraon
of the patent, selement of the lawsuit or a decision in the infringement case that is favorable to the ANDA sponsor. Also, the ANDA will not be approved
unl any applicable non-patent exclusivity listed in the Orange Book for the referenced product has expired.

Exclusivity

Upon NDA approval of a new chemical enty, or NCE, which is a drug that contains an acve moiety that has not been approved by the FDA in any other NDA,
that drug receives five years of markeng exclusivity during which me the FDA cannot accept any ANDA seeking approval of a generic version of that drug.
Certain changes to a drug, such as the addion of a new indicaon to the package insert, are associated with a three-year period of exclusivity during which
the FDA cannot approve an ANDA for a generic drug that includes such changes.

An ANDA may be submied one year before NCE exclusivity expires if a Paragraph IV cerficaon is filed. If there is no listed patent in the Orange Book, there
may not be a Paragraph IV cerficaon, and, thus, no ANDA may be filed before the expiraon of the exclusivity period.

Patent Term Extension

Aer NDA approval, owners of relevant drug patents or their agents may apply for up to a five-year patent extension for delays caused by FDA regulatory
review. The allowable patent term extension is calculated as half of the drug’s tesng phase which is the me between Invesgaonal New Drug applicaon,
or IND submission, and NDA submission, and all of the review phase, which is the me between NDA submission and approval, up to a maximum of five
years.  The  me  can  be  shortened  if  the  FDA  determines  that  the  sponsor  did  not  pursue  approval  with  due  diligence.  The  total  patent  term  aer  the
extension may not exceed 14 years from the date of approval by virtue of the patent term extension.

We have filed applicaons under the patent term extension provisions of 35 U.S.C. § 156 for U.S. Patent Nos. 8,299,298, 8,093,423, 7,767,851 and 8,338,642
each  of  which  covers  Auryxia  for  delays  caused  by  FDA  regulatory  review.  If  granted,  we  can  ulize  the  patent  term  extension  on  one  of  these  patents,
however, we cannot assure you that we can obtain any extension of the term of these patents. Upon expiraon of these patents, competors who obtain the
requisite regulatory approval may potenally offer products with the same composion and/or method of use as our product, so long as the competors do
not infringe any other patents that we may own or license.

For patents that might expire before a determinaon regarding patent term extension, the patent owner or its agent may request an interim patent term
extension.  An  interim  patent  extension  increases  the  patent  term  by  one  year  and  may  be  renewed  up  to  four  mes.  For  each  interim  patent  extension
granted, the post-approval patent extension is reduced by one

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year. The director of the USPTO must determine that approval of the drug covered by the patent for which a patent extension is being sought is likely.

In addion, certain jurisdicons outside of the U.S., including Japan, have provisions that provide for patent term extension. In October 2014, following the
regulatory  approval  of  Riona  in  Japan,  the  Japan  Patent  office  granted  the  patent  term  extensions  filed  by  our  sublicensee,  JT,  for  Japanese  Patents  Nos.
4964585  and  4173553.  As  a  result  of  the  extension  of  patent  term,  Japanese  Patent  No.  4173553  expired  in  November  2022  and  Japanese  Patent  No.
4964585 will expire in November 2025 for hyperphosphatemia and December 2028 for iron deficiency anemia. 

In the future, if and when our product candidates, including vadadustat, receive approval by the FDA or foreign regulatory authories, we expect to apply for
patent term extensions on issued patents covering those drugs, depending upon the length of the clinical trials for each product candidate and other factors.
There  can  be  no  assurance  that  any  of  our  pending  patent  applicaons  will  issue  or  that  we  will  benefit  from  any  patent  term  extension  or  favorable
adjustment to the term of any of our patents.

Compeon

The pharmaceucal and biotechnology industries are highly compeve, with several key players offering innovave soluons. The growing prevalence of
CKD and the increasing demand for beer anemia management soluons connue to drive compeon innovaon in this market. Our competors include
public and private pharmaceucal and biotechnology companies, academic instuons, and public and private research instuons. In addion, companies
that  are  acve  in  different  but  related  fields  represent  substanal  compeon  for  us.  Mergers  and  acquisions  in  the  pharmaceucal  and  biotechnology
industries may result in a larger concentraon of resources among a smaller number of our competors. These organizaons, as well as others in the broader
industries, compete with us to recruit qualified personnel, aract partners for joint ventures or other collaboraons and license compeve technologies to
ours.

While major pharmaceucal companies are connuously invesng in R&D and have significantly greater capital resources, larger R&D teams and facilies and
more experience in drug development, regulaon, manufacturing and markeng than we do; we believe our novel HIF-PH inhibitors have the potenal to
revoluonize  the  treatment  landscape  in  mulple  areas,  including  anemia  due  to  CKD.  To  compete  successfully  in  these  industries,  we  must  connue  to
idenfy novel and unique drugs or treatment methods and complete the development of those drugs as treatments before our competors.

Vadadustat Competors

Drugs  that  may  compete  with  vadadustat,  if  approved,  include  Epogen®  (epoen  alfa)  and  Aranesp®  (darbepoen  alfa),  both  commercialized  by  Amgen,
Procrit® (epoen alfa) and Eprex® (epoen alfa), commercialized by Johnson & Johnson in the U.S. and Europe, respecvely, and Mircera® (methoxy PEG-
epoen beta), commercialized by CSL Vifor in the U.S. and Roche Holding Ltd. outside of the U.S. and Evrenzo  (roxadustat) in Europe commercialized by
Astellas Pharma Inc.

(R)

In addion, in the U.S., the FDA approved Jesduvroq (daprodustat), an oral HIF-PH inhibitor from GSK, for the once-a-day treatment of anemia due to CKD in
adults who have been receiving dialysis for at least four months. FibroGen Inc., or FibroGen, filed an NDA with the FDA for its product candidate, roxadustat,
to which the FDA issued a complete response leer indicang the FDA will not approve the NDA in its present form.

We and our partners may also face compeon from potenal new anemia therapies. There are several other HIF-PH inhibitor product candidates in various
stages of development for anemia indicaons that may be in direct compeon with vadadustat, if and when approved and launched commercially. These
candidates are being developed by companies such as JT and Bayer HealthCare AG, or Bayer.

Furthermore, certain companies are developing new therapies for renal-related diseases that potenally could reduce injectable ESA ulizaon and thus limit
the market potenal for vadadustat if approved and launched commercially. Other new therapies are in development for treang condions, including renal
anemia, that may impact the market for anemia-targeted treatment.

In  Japan,  vadadustat  is  sold  under  the  name  Vafseo,  which  is  approved  for  paents  with  CKD,  including  both  DD-CKD  and  NDD-CKD,  and  competes  with
roxadustat,  daprodustat  and  enarodustat.  Roxadustat  is  approved  for  the  treatment  of  anemia  due  to  CKD,  including  DD-CKD  and  NDD-CKD  paents.  In
addion, daprodustat, GSK’s product candidate, and enarodustat, JT’s product candidate, are approved in Japan for the treatment of anemia due to CKD. In
addion, Bayer HealthCare AG has submied a new drug applicaon for its product candidate for the treatment of renal anemia in Japan. In China, FibroGen
launched roxadustat for the treatment of anemia due to CKD in DD-CKD paents and for the treatment of anemia due to CKD in NDD-CKD paents.

A  biosimilar  is  a  biologic  product  approved  based  on  demonstrang  that  it  is  highly  similar  to  an  exisng,  FDA-approved  branded  biologic  product.  The
patents for the exisng, branded biologic product must expire in a given market before biosimilars may enter that market without the risk of being sued for
patent infringement. In addion, an applicaon for a

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biosimilar product can only be approved by the FDA 12 years aer the exisng, branded product was approved under a Biologics License Applicaon, or BLA.
The patents for epoen alfa, an injectable ESA, expired in 2004 in the EU, and the remaining patents expired between 2012 and 2016 in the U.S. Because
injectable ESAs are biologic products, introducing biosimilars into the injectable ESA market in the U.S. will constute addional compeon for vadadustat if
we are able to obtain approval for and commercially launch vadadustat. In the U.S., Pfizer’s biosimilar version of injectable ESAs, Retacrit® (epoen alfa-epbx),
was approved by the FDA in May 2018 and launched in November 2018 and several biosimilar versions of injectable ESAs are available for sale in the EU.

Furthermore, if approved, vadadustat’s commercial opportunies, may be reduced or eliminated if our competors develop and market products that are less
expensive, more effecve, safer or offer greater paent convenience than vadadustat.

Auryxia Competors

Hyperphosphatemia Compeon

Auryxia is compeng in the hyperphosphatemia market in the U.S. with other FDA-approved phosphate binders such as Renagel® (sevelamer hydrochloride)
and Renvela® (sevelamer carbonate), both marketed by Sanofi, PhosLo® and Phoslyra® (calcium acetate), marketed by Fresenius Medical Care North America,
Fosrenol® (lanthanum carbonate), marketed by Shire Pharmaceucals Group plc, and Velphoro® (sucroferric oxyhydroxide), marketed by Fresenius Medical
Care North America, as well as over-the-counter calcium carbonate products such as TUMS® and metal-based opons such as aluminum, lanthanum and
magnesium.  Most  of  the  phosphate  binders  listed  above  are  now  also  available  in  generic  forms.  In  addion,  other  agents  are  in  development,  including
OPKO Health Inc.’s Alpharen™ Tablets (fermagate tablets) and Unicycive’s RENAZORB™ (lanthanum dioxycarbonate) or could otherwise enter the market that
may  impact  the  market  for  Auryxia.  In  October  2023,  the  FDA  approved  XPHOZAH®  (tenapanor),  a  phosphate  absorpon  inhibitor  that  is  marketed  by
Ardelyx, Inc. and indicated to reduce serum phosphorus in adults with CKD on dialysis as add-on therapy in paents who have an inadequate response to
phosphate binders or who are intolerant of any dose of phosphate binder therapy.

Iron Deficiency Anemia Compeon

Auryxia is compeng in the IDA market in the U.S. with over-the-counter oral iron, ferrous sulfate, other prescripon oral iron formulaons, including ferrous
gluconate,  ferrous  fumerate,  and  polysaccharide  iron  complex,  and  intravenous  iron  formulaons,  including  Feraheme®  (ferumoxytol  injecon),  Venofer®
(iron  sucrose  injecon),  Ferrlicit®  (sodium  ferric  gluconate  complex  in  sucrose  injecon),  Injectafer®  (ferric  carboxymaltose  injecon),  and  Triferic®  (ferric
pyrophosphate  citrate).  In  addion,  other  new  therapies  for  the  treatment  of  IDA  may  impact  the  market  for  Auryxia,  such  as  Shield  Therapeuc’  plc's
Feraccru® (ferric maltol), which is available in Europe for the treatment of IDA, and Accrufer® (ferric maltol), which was launched in the U.S. for the treatment
of IDA in July 2021.

Furthermore,  Auryxia’s  commercial  opportunies  may  be  reduced  or  eliminated  if  our  competors  develop  and  market  products  that  are  less  expensive,
more effecve, safer or offer greater paent convenience than Auryxia. Other companies have product candidates in various stages of preclinical or clinical
development to treat diseases and complicaons of the diseases for which we are markeng Auryxia. In addion, we entered into selement agreements
with each of our ANDA filers pursuant to which we granted licenses to market a generic version of Auryxia in the U.S. beginning in March 2025 (subject to FDA
approval), or earlier under certain circumstances customary for selement agreements of this nature, which may materially adversely impact our business
and results of operaons.

Government Regulaon and Product Approvals

Government authories in the U.S., at the federal, state and local level, and in other countries and jurisdicons, including the EU, extensively regulate, among
other things, the research, development, tesng, manufacture, quality control, approval, packaging, storage, recordkeeping, labeling, adversing, promoon,
distribuon,  markeng,  sales,  pricing,  reimbursement,  post-approval  monitoring  and  reporng,  and  import  and  export  of  pharmaceucal  products.  The
processes for obtaining regulatory approvals in the U.S. and in foreign countries and jurisdicons, along with subsequent compliance with applicable statutes
and regulaons and other regulatory requirements, require the expenditure of substanal me and financial resources.

Review and Approval of Drug Products in the U.S.

In the U.S., the FDA approves and regulates drugs under the FDCA and applicable implemenng regulaons and guidance.

Our product candidates must be approved by the FDA for therapeuc indicaons before we or our partners are able to market them in the U.S. A company,
instuon, or organizaon which takes responsibility for the iniaon and management of a clinical development program for such products is referred to as
a sponsor. A sponsor seeking approval to market and distribute a new drug product in the U.S. must typically undertake the following:

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compleon of preclinical laboratory tests, animal studies and formulaon studies in compliance with the FDA’s good laboratory pracce, or
GLP,  regulaons  and  consistent  with  Internaonal  Council  for  Harmonisaon  of  Technical  Requirements  for  Pharmaceucals  for  Human
Use, or ICH, requirements;

design of a clinical protocol and submission to the FDA of an IND for human clinical tesng, which must be reviewed and acve by the FDA
before human clinical trials may begin;

approval by an independent local or central instuonal review board, or IRB, represenng each clinical site before each clinical trial may
be iniated;

performance of adequate and well-controlled human clinical trials in accordance with good clinical pracces, or GCP, to establish the safety
and efficacy of the proposed product candidate for each indicaon;

preparaon and submission to the FDA of an NDA requesng markeng for one or more proposed indicaons;

review of the product candidate by an FDA advisory commiee, where appropriate or if applicable;

sasfactory  compleon  of  one  or  more  FDA  inspecons  of  the  manufacturing  facility  or  facilies  at  which  the  product  candidate,  or
components thereof, are produced to assess compliance with current Good Manufacturing Pracces, or cGMP, requirements and to assure
that the facilies, methods and controls are adequate to preserve the product candidate’s identy, strength, quality and purity;

sasfactory compleon of FDA audits of clinical trial sites and records to assure compliance with GCPs and good pracces, or GxPs,  the
integrity  of  the  clinical  data  and  that  adequate  controls  and  oversight  are  in  place  regarding  manufacturing,  clinical  trials,
pharmacovigilance, safety, data management, vendor oversight, collecon and reporng of serious adverse events and other acvies;

payment of user fees and securing FDA approval of an NDA; and

compliance with any post-approval requirements and/or commitments, including the potenal requirement to implement a risk evaluaon
and migaon strategy, or REMS, and potenally post-market requirement, or PMR, and post-market commitment, or PMC, studies.

Preclinical Tests

Before a sponsor begins tesng a product candidate with potenal therapeuc value in humans, the product candidate enters the preclinical tesng stage.
Preclinical tests include laboratory evaluaons of product chemistry, formulaon and stability, as well as other studies to evaluate, among other things, the
toxicity of the product candidate. The conduct of the preclinical tests and formulaon of the compounds for tesng must comply with federal regulaons and
requirements,  including  GLP  regulaons  and  standards  and  the  U.S.  Department  of  Agriculture’s  Animal  Welfare  Act,  if  applicable.  The  results  of  the
preclinical tests, together with manufacturing informaon and analycal data, are submied to the FDA as part of an IND and are generally referred to as
IND-enabling  studies.  Some  long-term  preclinical  tesng,  such  as  animal  tests  of  reproducve  adverse  events  and  carcinogenicity,  and  long-term  toxicity
studies, may connue aer the IND is submied.

The IND and IRB Processes

Clinical trials involve the administraon of the invesgaonal product to human paents under the supervision of qualified invesgators in accordance with
GCP requirements, which include, among other things, the requirement that all research paents provide their voluntary informed consent in wring before
their parcipaon in any clinical trial. Clinical trials are conducted under wrien study protocols detailing, among other things, the inclusion and exclusion
criteria, the objecves of the study, the parameters to be used in monitoring safety and the effecveness criteria to be evaluated. In support of a request for
an IND, sponsors must submit a protocol for each clinical trial and any subsequent protocol amendments must be submied to the FDA as part of the IND.

An IND is an exempon from the FDCA that allows an unapproved drug to be shipped through interstate commerce for use in an invesgaonal clinical trial
and a request for FDA authorizaon to administer an invesgaonal drug to humans. Such authorizaon must be obtained prior to interstate shipment and
administraon of any new drug that is not the subject of an approved NDA. In addion to reviewing an IND to assure the safety and rights of paents, the FDA
also focuses on the quality of the invesgaon and whether it will be adequate to permit an evaluaon of the drug’s safety and efficacy. The results of the
preclinical tests, together with manufacturing informaon, analycal data, any available clinical data or literature and plans for clinical trials, among other
things, are submied to the FDA as part of an IND. The FDA requires a 30-day waing period aer the submission of each IND before clinical trials may begin.
This waing period is designed to allow the FDA to review the IND to determine whether human research paents will be exposed to unreasonable health
risks. At any me during this 30-day period, or thereaer, the FDA may raise concerns or quesons about the conduct of the trials as outlined in the IND and
impose a clinical hold or paral clinical hold or require that the sponsor amend the clinical protocol to include addional safety measurements. In this case,
the IND sponsor and the FDA must resolve any outstanding concerns before clinical trials can begin (or resume if the clinical trial had been ongoing at the
me a clinical hold was imposed).

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In addion to the foregoing requirements related to the IND submission, an IRB represenng each instuon parcipang in the clinical trial must review and
approve the plan for any clinical trial before it commences at that instuon, and the IRB must conduct a connuing review and reapprove the trial at least
annually. The IRB must review and approve, among other things, the trial protocol and informed consent informaon to be provided to study paents. An IRB
must operate in compliance with FDA regulaons. An IRB can suspend or terminate approval of a clinical trial at its instuon, or an instuon it represents, if
the clinical trial is not being conducted in accordance with the IRB’s requirements or if the product candidate has been associated with unexpected serious
harm to paents.

A sponsor may choose, but is not required, to conduct a foreign clinical study under an IND. When a foreign clinical study is conducted under an IND, all IND
requirements must be met unless waived by the FDA. When a foreign clinical study is not conducted under an IND, the sponsor must ensure that the study
complies with certain regulatory requirements of the FDA in order to use the study as support for an IND or applicaon for markeng approval. Specifically,
the studies must be conducted in accordance with GCP, including undergoing review and receiving approval by an independent ethics commiee and seeking
and receiving informed consent from subjects. GCP requirements encompass both ethical and data integrity standards for clinical trials. The FDA’s regulaons
are intended to help ensure the protecon of human subjects enrolled in non-IND foreign clinical trials, as well as the quality and integrity of the resulng
data. They further help ensure that non-IND foreign studies are conducted in a manner comparable to that required for IND studies.

Reporng Clinical Trial Results

Under the Public Health Service Act, or PHSA, sponsors of certain clinical trials of certain FDA-regulated products, including prescripon drugs and biologics,
are  required  to  register  and  disclose  certain  clinical  trial  informaon  on  a  public  registry  (clinicaltrials.gov)  maintained  by  the  U.S.  Naonal  Instutes  of
Health, or NIH. In parcular, informaon related to the product, paent populaon, phase of invesgaon, study sites and invesgators and other aspects of
the clinical trial is made public as part of the registraon of the clinical trial. Although sponsors are also obligated to disclose the results of their clinical trials
aer compleon, disclosure of the results can be delayed in some cases for up to two years aer the date of compleon of the trial. The NIH’s Final Rule on
registraon and reporng requirements for clinical trials became effecve in 2017, and both NIH and the FDA have signaled the government’s willingness to
begin enforcing those requirements against non-compliant clinical trial sponsors.

Specifically, the PHSA grants the Secretary of the U.S. Department of Health and Human Services, or HHS, the authority to issue a noce of noncompliance to
a responsible party for failure to submit clinical trial informaon as required. The responsible party, however, is allowed 30 days to correct the noncompliance
and submit the required informaon. With the issuance of pre-noces for voluntary correcve acon and several noces of non-compliance during the past
two years, the FDA has signaled the government’s willingness to enforce these requirements against non-compliant clinical trial sponsors. While these noces
of non-compliance did not result in civil monetary penales, the failure to submit clinical trial informaon to clinicaltrials.gov, as required, is also a prohibited
act under the FDCA with violaons subject to potenal civil monetary penales of up to $10,000 for each day the violaon connues. In addion to civil
monetary  penales,  violaons  may  also  result  in  other  regulatory  acon,  such  as  injuncon  and/or  criminal  prosecuon  or  disqualificaon  from  federal
grants. Although the FDA has historically not enforced these reporng requirements due to HHS’s long delay in issuing final implemenng regulaons, those
regulaons have now been issued and the FDA has issued several Noces of Noncompliance to manufacturers during the past two years.

Expanded Access to an Invesgaonal Drug for Treatment Use

Expanded access, somemes called “compassionate use,” is the use of invesgaonal new drug products outside of clinical trials to treat paents with serious
or immediately life-threatening diseases or condions when there are no comparable or sasfactory alternave treatment opons. The rules and regulaons
related  to  expanded  access  are  intended  to  improve  access  to  invesgaonal  drugs  for  paents  who  may  benefit  from  invesgaonal  therapies.  FDA
regulaons allow access to invesgaonal drugs under an IND by the company or the treang physician for treatment purposes on a case-by-case basis for:
individual paents (single-paent IND applicaons for treatment in emergency sengs and non-emergency sengs); intermediate-size paent populaons;
and larger populaons for use of the drug under a treatment protocol or Treatment IND Applicaon.

There is no obligaon for a sponsor to make its invesgaonal products available for expanded access; however, as required by amendments to the FDCA
included  in  the  21st  Century  Cures  Act  passed  in  2016,  if  a  sponsor  has  a  policy  regarding  how  it  responds  to  expanded  access  requests  with  respect  to
product candidates in development to treat serious diseases or condions, it must make that policy publicly available. Sponsors are required to make such
policies publicly available upon the earlier of iniaon of a Phase 2 or Phase 3 trial for a covered invesgaonal product; or 15 days aer the invesgaonal
product receives designaon from the FDA as a breakthrough therapy, fast track product, or regenerave medicine advanced therapy.

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On May 30, 2018, the Right to Try Act was signed into law. The law, among other things, provides a federal framework for certain paents to access certain
invesgaonal  new  drug  products  that  have  completed  a  Phase  I  clinical  trial  and  that  are  undergoing  invesgaon  for  FDA  approval.  Under  certain
circumstances, eligible paents can seek treatment without enrolling in clinical trials and without obtaining FDA permission under the FDA expanded access
program. There is no obligaon for a drug manufacturer to make its product candidates available to eligible paents as a result of the Right to Try Act, but the
manufacturer must develop an internal policy and respond to paent requests according to that policy.

Human Clinical Trials in Support of an NDA

Clinical trials involve the administraon of the invesgaonal product to human paents under the supervision of qualified invesgators in accordance with
GCP  requirements,  which  include,  among  other  things,  the  requirement  that  all  research  paents  provide  their  informed  consent  in  wring  before  their
parcipaon in any clinical trial. Clinical trials are conducted under wrien study protocols detailing, among other things, the inclusion and exclusion criteria,
the objecves of the study, the parameters to be used in monitoring safety and the effecveness criteria to be evaluated.

Human clinical trials are typically conducted in four sequenal phases, which may overlap or be combined:

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Phase 1.  The  product  candidate  is  inially  introduced  into  a  small  number  of  healthy  human  paents  or,  in  certain  indicaons  such  as
cancer,  paents  with  the  target  disease  or  condion  (e.g.,  cancer)  and  tested  for  safety,  dosage  tolerance,  absorpon,  metabolism,
distribuon, excreon and, if possible, to gain an early indicaon of its effecveness and to determine opmal dosage.

Phase 2.  The  product  candidate  is  administered  to  a  limited  paent  populaon  to  idenfy  possible  adverse  effects  and  safety  risks,  to
preliminarily evaluate the efficacy of the product candidate for specific targeted diseases and to determine dosage tolerance and opmal
dosage.

Phase 3. These clinical trials are commonly referred to as “pivotal” studies, which denote a study that presents the data that the FDA or
other  relevant  regulatory  agency  will  use  to  determine  whether  or  not  to  approve  a  product  candidate.  The  product  candidate  is
administered to an expanded paent populaon, generally at geographically dispersed clinical trial sites, in well-controlled clinical trials to
generate  enough  data  to  stascally  evaluate  the  efficacy  and  safety  of  the  product  candidate  for  approval,  idenfy  adverse  effects,
establish  the  overall  risk-benefit  profile  of  the  product  candidate  and  to  provide  adequate  informaon  for  the  labeling  of  the  product
candidate.

Phase 4. Post-approval studies may be conducted aer inial markeng approval. These studies are used to gain addional experience from
the treatment of paents in the intended therapeuc indicaon.

A clinical trial may combine the elements of more than one phase and the FDA oen requires more than one Phase 3 trial to support markeng approval of a
product  candidate.  Moreover,  as  noted  above,  a  pivotal  trial  is  a  clinical  trial  that  is  believed  to  sasfy  FDA  requirements  for  the  evaluaon  of  a  product
candidate’s safety and efficacy such that it can be used, alone or with other pivotal or non-pivotal trials, to support regulatory approval. Generally, pivotal
trials are Phase 3 trials, but they may be Phase 2 trials if the design provides a well-controlled and reliable assessment of clinical benefit, parcularly in an
area  of  unmet  medical  need.  A  company’s  designaon  of  a  clinical  trial  as  being  of  a  parcular  phase  is  not  necessarily  indicave  that  the  study  will  be
sufficient to sasfy the FDA requirements of that phase because this determinaon cannot be made unl the protocol and data have been submied to and
reviewed by the FDA.

In December 2022, with the passage of the Food and Drug Omnibus Reform Act, or FDORA, Congress required sponsors to develop and submit a diversity
acon plan for each phase 3 clinical trial or any other “pivotal study” of a new drug or biological product. These plans are meant to encourage the enrollment
of  more  diverse  paent  populaons  in  late-stage  clinical  trials  of  FDA-regulated  products.  Specifically,  acons  plans  must  include  the  sponsor’s  goals  for
enrollment, the underlying raonale for those goals, and an explanaon of how the sponsor intends to meet them. In addion to these requirements, the
legislaon directs the FDA to issue new guidance on diversity acon plans. Progress reports detailing the results of the clinical trials conducted under the IND
must be submied at least annually to the FDA and, more frequently, if serious adverse events occur. In addion, IND safety reports must be submied to the
FDA for any of the following: serious and unexpected suspected adverse reacons; findings from other studies or animal or in vitro tesng that suggest a
significant risk in humans exposed to the drug; and any clinically important increase in the case of a serious suspected adverse reacon over that listed in the
protocol or invesgator brochure. The FDA, IRB or the sponsor or the data monitoring commiee may suspend or terminate a clinical trial at any me on
various grounds, including a finding that the research paents are being exposed to an unacceptable health risk. The FDA will typically inspect one or more
clinical sites to assure compliance with GCP and the integrity of the clinical data submied.

In June 2023, the FDA issued dra guidance with updated recommendaons for GCPs aimed at modernizing the design and conduct of clinical trials. The
updates are intended to help pave the way for more efficient clinical trials to facilitate the development of medical products. The dra guidance is adopted
from the ICH’s recently updated E6(R3) dra guideline that

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was developed to enable the incorporaon of rapidly developing technological and methodological innovaons into the clinical trial enterprise. In addion,
the FDA issued dra guidance outlining recommendaons for the implementaon of decentralized clinical trials.

Interacons with the FDA During the Clinical Development Program

Following the clearance of an IND and the commencement of clinical trials, a sponsor will connue to have interacons with the FDA and the sponsor may
meet with the FDA at certain points in the clinical development program. Specifically, sponsors may meet with the FDA prior to the submission of an IND, or a
pre-IND meeng, at the end of Phase 2 clinical trials and before an NDA is submied, or a pre-NDA meeng. Meengs at other mes may also be requested.
These meengs provide an opportunity for the sponsor to share informaon about the data gathered to date with the FDA and for the FDA to provide advice
on the next phase of development.

There are five types of meengs that occur between sponsors and the FDA. Type A meengs are those that are necessary for an otherwise stalled product
development program to proceed or to address an important safety issue. Type B meengs include pre-IND and pre-NDA meengs as well as end of phase
meengs such as end-of-phase 2 meengs. A Type C meeng is any meeng other than a Type A or Type B meeng regarding the development and review of
a  product,  including  for  example  meengs  to  facilitate  early  consultaons  on  the  use  of  a  biomarker  as  a  new  surrogate  endpoint  that  has  never  been
previously used as the primary basis for product approval in the proposed context of use. A Type D meeng is focused on a narrow set of issues (typically
limited  to  no  more  than  two  focused  topics)  and  should  not  require  input  from  more  than  three  disciplines  or  divisions.  Finally,  INTERACT  meengs  are
intended for novel products and development programs that present unique challenges in the early development of an invesgaonal product.

Such  meengs  may  be  conducted  in  person,  via  teleconference/videoconference,  or  wrien  response  only  with  minutes  reflecng  the  quesons  that  the
sponsor posed to the FDA and the agency’s responses. The FDA has indicated that its responses, as conveyed in meeng minutes and advice leers, only
constute  mere  recommendaons  and/or  advice  made  to  a  sponsor  and,  as  such,  sponsors  are  not  bound  by  such  recommendaons  and/or  advice.
Nonetheless, from a praccal perspecve, a sponsor’s failure to follow the FDA’s recommendaons for design of a clinical program may put the program at
significant risk of failure. In September 2023, the FDA issued dra guidance outlining the terms of such meengs in more detail.

Pediatric Studies

Under the Pediatric Research Equity Act, or PREA, applicaons and certain types of supplements to applicaons must contain data that are adequate to assess
the safety and effecveness of the product for the claimed indicaons in all relevant pediatric subpopulaons, and to support dosing and administraon for
each pediatric subpopulaon for which the product is safe and effecve. The sponsor must submit an inial Pediatric Study Plan, or PSP, within 60 days of an
end-of-phase 2 meeng or as may be agreed between the sponsor and the FDA. Those plans must contain an outline of the proposed pediatric study or
studies the sponsor plans to conduct, including study objecves and design, age groups, relevant endpoints and stascal approach, or a jusficaon for not
including such detailed informaon, and any request for a deferral of pediatric assessments or a full or paral waiver of the requirement to provide data from
pediatric studies along with supporng informaon. The sponsor and the FDA must reach agreement on a final plan. A sponsor can submit amendments to an
agreed-upon inial PSP at any me if changes to the pediatric plan need to be considered based on data collected from nonclinical trials, early phase clinical
trials, and/or other clinical development programs.

For invesgaonal products intended to treat a serious or life-threatening disease or condion, the FDA must, upon the request of a sponsor, meet to discuss
preparaon of the inial pediatric study plan or to discuss deferral or waiver of pediatric assessments. In addion, the FDA will meet early in the development
process to discuss pediatric study plans with sponsors, and the FDA must meet with sponsors by no later than the end-of-phase 1 meeng for serious or life-
threatening diseases and by no later than ninety days aer the FDA’s receipt of the study plan.

The FDA may, on its own iniave or at the request of the sponsor, grant deferrals for submission of some or all pediatric data unl aer approval of the
product for use in adults, or full or paral waivers from the pediatric data requirements. A deferral may be granted for several reasons, including a finding that
the product or therapeuc candidate is ready for approval for use in adults before pediatric trials are complete or that addional safety or effecveness data
needs to be collected before the pediatric trials begin. Pursuant to the Food and Drug Administraon Safety and Innovaon Act of 2012, or FDASIA, the FDA
must  send  a  PREA  Non-Compliance  leer  to  sponsors  who  have  failed  to  submit  their  pediatric  assessments  required  under  PREA,  have  failed  to  seek  or
obtain a deferral or deferral extension or have failed to request approval for a required pediatric formulaon. FDASIA further requires the FDA to publicly post
the PREA Non-Compliance leer and sponsor’s response. Unless otherwise required by regulaon, the pediatric data requirements do not apply to products
with orphan designaon, although FDA has recently taken steps to limit what it considers abuse of this statutory exempon in PREA by announcing that it
does not intend to grant any addional orphan drug designaons for rare pediatric subpopulaons of what is otherwise a common disease. The FDA also
maintains a list of diseases that are exempt from PREA requirements due to low prevalence of disease

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in the pediatric populaon. In May 2023, the FDA issued new dra guidance that further describes the pediatric study requirements under PREA.

Acceptance and Review of an NDA

Assuming  successful  compleon  of  required  clinical  tesng  and  other  requirements,  the  results  of  the  preclinical  studies  and  clinical  trials,  together  with
detailed informaon relang to the product’s chemistry, manufacture, controls and proposed labeling, among other things are submied to the FDA as part
of an NDA requesng approval to market the product candidate for one or more indicaons. The fee required for the submission and review of an applicaon
under  the  PDUFA  is  substanal  (for  example,  for  fiscal  year  2024  this  applicaon  fee  is  a  lile  more  than  $4.0  million),  and  the  sponsor  of  an  approved
applicaon is also subject to an annual program fee, currently approximately $0.4 million per eligible prescripon product. These fees are typically adjusted
annually, and exempons and waivers may be available under certain circumstances, such as where a waiver is necessary to protect the public health, where
the  fee  would  present  a  significant  barrier  to  innovaon,  or  where  the  sponsor  is  a  small  business  subming  its  first  human  therapeuc  applicaon  for
review.

The FDA conducts a preliminary review of all applicaons within 60 days of receipt and must inform the sponsor at that me or before whether an applicaon
is sufficiently complete to permit substanve review. This is known as the filing decision. In the event that FDA determines that an applicaon does not sasfy
this standard, it will issue a Refuse to File determinaon to the sponsor. The FDA may request addional informaon rather than accept an NDA for filing. In
this event, the applicaon must be resubmied with the addional informaon. The resubmied applicaon is also subject to review before the FDA accepts
it for filing. Once the submission is accepted for filing, the FDA begins an in-depth substanve review. The FDA has agreed to certain performance goals in the
review  process  of  NDAs.  Most  such  applicaons  are  meant  to  be  reviewed  within  ten  months  from  the  date  of  filing,  and  most  applicaons  for  “priority
review” products are meant to be reviewed within six months of filing. A product that has been designated as a breakthrough therapy may also be eligible for
review  within  six  months  if  supported  by  clinical  data  at  the  me  of  submission  of  the  NDA.  The  review  process  may  be  extended  by  the  FDA  for  three
addional months to consider new informaon or clarificaon provided by the sponsor to address an outstanding deficiency idenfied by the FDA following
the original submission.

Before approving an NDA, the FDA typically will inspect the facility or facilies where the product is or will be manufactured. These pre-approval inspecons
may cover all facilies associated with an NDA submission, including drug component manufacturing such as acve pharmaceucal ingredients, finished drug
product manufacturing, control tesng laboratories, as well as packaging and labeling facilies. The FDA will not approve an applicaon unless it determines
that  the  manufacturing  processes  and  facilies  are  in  compliance  with  cGMP  requirements  and  adequate  to  assure  consistent  producon  of  the  product
within required specificaons. The PREVENT Pandemics Act, which was enacted in December 2022, clarifies that foreign drug manufacturing establishments
are  subject  to  registraon  and  lisng  requirements  even  if  a  drug  or  biologic  undergoes  further  manufacture,  preparaon,  propagaon,  compounding,  or
processing at a separate establishment outside the U.S. prior to being imported or offered for import into the U.S.

Addionally, before approving an NDA, the FDA will typically inspect one or more clinical sites to assure compliance with GCP. The sponsor of the NDA may
also have their records, processes, procedures, training, and other aspects reviewed during an inspecon. The FDA must implement a protocol to expedite
review of responses to inspecon reports pertaining to certain drug applicaons, including applicaons for drugs in a shortage or drugs for which approval is
dependent on remediaon of condions idenfied in the inspecon report.

In addion, as a condion of approval, the FDA may require a sponsor to develop a REMS. REMS use risk minimizaon strategies beyond the professional
labeling to ensure that the benefits of the product outweigh the potenal risks.

Finally,  the  FDA  may  refer  an  applicaon  for  a  novel  drug  to  an  advisory  commiee  or  explain  why  such  referral  was  not  made.  Typically,  an  advisory
commiee is a panel of independent experts, including clinicians and other scienfic experts, that reviews, evaluates and provides a recommendaon as to
whether the applicaon should be approved and under what condions. The FDA is not bound by the recommendaons of an advisory commiee, but it
considers such recommendaons carefully when making decisions.

Fast Track, Breakthrough Therapy, Priority Review

The FDA is authorized to designate certain products for expedited review if they are intended to address an unmet medical need in the treatment of a serious
or  life-threatening  disease  or  condion.  These  programs  are  referred  to  as  fast  track  designaon,  breakthrough  therapy  designaon,  priority  review
designaon.

Specifically, the FDA may designate a product for fast track review if it is intended, whether alone or in combinaon with one or more other drugs, for the
treatment  of  a  serious  or  life-threatening  disease  or  condion,  and  it  demonstrates  the  potenal  to  address  unmet  medical  needs  for  such  a  disease  or
condion. The fast track designaon may be withdrawn by the FDA if the FDA believes that the designaon is no longer supported by data emerging in the
clinical trial process.

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Second, in 2012, Congress enacted the Food and Drug Administraon Safety and Improvement Act. This law established a new regulatory scheme allowing for
expedited review of products designated as “breakthrough therapies.” A product may be designated as a breakthrough therapy if it is intended, either alone
or in combinaon with one or more other drugs, to treat a serious or life-threatening disease or condion and preliminary clinical evidence indicates that the
product  may  demonstrate  substanal  improvement  over  exisng  therapies  on  one  or  more  clinically  significant  endpoints,  such  as  substanal  treatment
effects observed early in clinical development. The FDA may take certain acons with respect to breakthrough therapies, including holding meengs with the
sponsor throughout the development process; providing mely advice to the product sponsor regarding development and approval; involving more senior
staff in the review process; assigning a cross-disciplinary project lead for the review team; and taking other steps to design the clinical trials in an efficient
manner.

Third,  the  FDA  may  designate  a  product  for  priority  review  if  it  is  a  drug  that  treats  a  serious  condion  and,  if  approved,  would  provide  a  significant
improvement in safety or effecveness. The FDA determines, on a case-by-case basis, whether the proposed drug represents a significant improvement when
compared with other available therapies. A priority designaon is intended to direct overall aenon and resources to the evaluaon of such applicaons,
and to shorten the FDA’s review clock goal for taking acon on a markeng applicaon from ten months to six months.

Priority Review Vouchers

A priority review voucher, or PRV, is a voucher that the FDA issues to a sponsor of a rare pediatric disease or tropical disease product applicaon at the me
of the markeng applicaon approval. Vouchers are transferable to other sponsors that may apply it to their NDAs or biologics license applicaon, or BLAs. A
PRV entles the holder to designate a single human drug applicaon submied under Secon 505(b)(1) of the U.S. Federal Food, Drug, and Cosmec Act or
Secon  351  of  the  Public  Health  Service  Act  as  qualifying  for  a  priority  review.  An  FDA  priority  review  may  expedite  the  review  process  of  a  markeng
applicaon reducing the review me from ten months aer formal acceptance of the file to six months aer formal acceptance of the file. Applying the PRV
to a markeng applicaon does not ensure the FDA’s approval of the markeng applicaon and all requirements supporng the safety and efficacy of the
product must be met. Our NDA submission for vadadustat did not include a PRV.

Accelerated Approval Pathway

Drug or biologic products studied for their safety and effecveness in treang serious or life-threatening illnesses and that provide meaningful therapeuc
benefit over exisng treatments may receive accelerated approval. Accelerated approval means that a product candidate may be approved on the basis of
adequate and well controlled clinical trials establishing that the product candidate has an effect on a surrogate endpoint that is reasonably likely to predict a
clinical benefit, or on the basis of an effect on a clinical endpoint other than survival or irreversible morbidity or mortality or other clinical benefit, taking into
account the severity, rarity and prevalence of the condion and the availability or lack of alternave treatments. As a condion of approval, the FDA may
require that a sponsor of a drug or biologic product candidate receiving accelerated approval perform adequate and well controlled post-markeng clinical
trials. In addion, the FDA currently requires as a condion for accelerated approval pre-approval of promoonal materials.

With  the  passage  of  FDORA  in  December  2022,  Congress  modified  certain  provisions  governing  accelerated  approval  of  drug  and  biologic  products.
Specifically,  the  new  legislaon  authorized  the  FDA  to:  require  a  sponsor  to  have  its  confirmatory  clinical  trial  underway  before  accelerated  approval  is
awarded, require a sponsor of a product granted accelerated approval to submit progress reports on its post-approval studies to the FDA every six months
(unl the study is completed); and use expedited procedures to withdraw accelerated approval of an NDA or BLA aer the confirmatory trial fails to verify the
product’s  clinical  benefit.  Further,  FDORA  requires  the  FDA  to  publish  on  its  website  “the  raonale  for  why  a  post-approval  study  is  not  appropriate  or
necessary” whenever it decides not to require such a study upon granng accelerated approval.

In March 2023, the FDA issued dra guidance that outlines its current thinking and approach to accelerated approval. The agency indicated that although
single-arm trials have been commonly used to support accelerated approval, a randomized controlled trial is the preferred approach as it provides a more
robust efficacy and safety assessment and allows for direct comparisons to an available therapy. To that end, the FDA outlined consideraons for designing,
conducng, and analyzing data for trials intended to support accelerated approvals of oncology therapeucs. While this guidance is currently only in dra
form and generally applies to oncology products and will ulmately not be legally binding even when finalized, sponsors typically observe the FDA’s guidance
closely to ensure that their invesgaonal products qualify for accelerated approval.

The FDA’s Decision on an NDA

The FDA reviews an applicaon to determine, among other things, whether the product is safe and whether it is effecve for its intended use(s), with the
laer determinaon being made on the basis of substanal evidence. The term “substanal evidence” is defined under the FDCA as “evidence consisng of
adequate  and  well-controlled  invesgaons,  including  clinical  invesgaons,  by  experts  qualified  by  scienfic  training  and  experience  to  evaluate  the
effecveness of the product involved, on the basis of which it could fairly and responsibly be concluded by such experts that the product will have the effect it

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purports or is represented to have under the condions of use prescribed, recommended, or suggested in the labeling or proposed labeling thereof.”

The FDA has interpreted this evidenary standard to require at least two adequate and well-controlled clinical invesgaons to establish effecveness of a
new product. Under certain circumstances, however, FDA has indicated that a single trial with certain characteriscs and addional informaon may sasfy
this standard. This approach was subsequently endorsed by Congress in 1998 with legislaon providing, in pernent part, that “If [FDA] determines, based on
relevant  science,  that  data  from  one  adequate  and  well-controlled  clinical  invesgaon  and  confirmatory  evidence  (obtained  prior  to  or  aer  such
invesgaon) are sufficient to establish effecveness, FDA may consider such data and evidence to constute substanal evidence.” This modificaon to the
law recognized the potenal for FDA to find that one adequate and well controlled clinical invesgaon with confirmatory evidence, including supporve data
outside  of  a  controlled  trial,  is  sufficient  to  establish  effecveness.  In  December  2019,  FDA  issued  dra  guidance  further  explaining  the  studies  that  are
needed  to  establish  substanal  evidence  of  effecveness.  Although  the  FDA  has  not  yet  finalized  that  guidance,  it  did  issue  addional  dra  guidance  in
September 2023 that outlines consideraons for relying on confirmatory evidence in lieu of a second clinical study.

Aer  evaluang  the  applicaon  and  all  related  informaon,  including  the  advisory  commiee  recommendaons,  if  any,  and  inspecon  reports  of
manufacturing facilies and clinical trial sites, the FDA will issue either a CRL or an approval leer. To reach this determinaon, the FDA must determine that
the drug is effecve and that its expected benefits outweigh its potenal risks to paents. This “benefit-risk” assessment is informed by the extensive body of
evidence  about  the  product’s  safety  and  efficacy  in  the  NDA  or  BLA.  This  assessment  is  also  informed  by  other  factors,  including:  the  severity  of  the
underlying condion and how well paents’ medical needs are addressed by currently available therapies; uncertainty about how the premarket clinical trial
evidence will extrapolate to real-world use of the product in the post-market seng; and whether risk management tools are necessary to manage specific
risks. In connecon with this assessment, the FDA review team will assemble all individual reviews and other documents into an “acon package,” which
becomes the record for FDA review. The review team then issues a recommendaon, and a senior FDA official makes a decision.

A CRL indicates that the review cycle of the applicaon is complete, and the applicaon will not be approved in its present form. A CRL generally outlines the
deficiencies in the submission and may require substanal addional tesng or informaon in order for the FDA to reconsider the applicaon. The CRL may
require  addional  clinical  or  other  data,  addional  pivotal  Phase  3  clinical  trial(s)  and/or  other  significant  and  me-  consuming  requirements  related  to
clinical trials, preclinical studies or manufacturing. If a CRL is issued, the sponsor will have one year to respond to the deficiencies idenfied by the FDA, at
which me the FDA can deem the applicaon withdrawn or, in its discreon, grant the sponsor an addional six month extension to respond. The FDA has
commied to reviewing resubmissions in response to an issued CRL in either two or six months depending on the type of informaon included. Even with the
submission of this addional informaon, however, the FDA ulmately may decide that the applicaon does not sasfy the regulatory criteria for approval.
The FDA has taken the posion that a CRL is not final agency acon making the determinaon subject to judicial review. Rather, for those seeking to challenge
FDA’s  CRL  decision,  the  agency  has  indicated  that  sponsors  may  request  a  formal  hearing  on  the  CRL  or  they  may  file  a  request  for  reconsideraon  or  a
request for a formal dispute resoluon.

An approval leer, on the other hand, authorizes commercial markeng of the product with specific prescribing informaon for specific indicaons. That is,
the approval will be limited to the condions of use (e.g., paent populaon, indicaon) described in the FDA-approved labeling. Further, depending on the
specific risk(s) to be addressed, the FDA may require that contraindicaons, warnings or precauons be included in the product labeling, require that post-
approval trials, including Phase 4 clinical trials, be conducted to further assess a product’s safety aer approval, require tesng and surveillance programs to
monitor the product aer commercializaon or impose other condions, including distribuon and use restricons or other risk management mechanisms
under a REMS which can materially affect the potenal market and profitability of the product. The FDA may prevent or limit further markeng of a product
based on the results of post-markeng trials or surveillance programs. Aer approval, some types of changes to the approved product, such as adding new
indicaons, manufacturing changes and addional labeling claims, are subject to further tesng requirements and FDA review and approval.

Under the Ensuring Innovaon Act, which was signed into law in April 2021, the FDA must publish acon packages summarizing its decisions to approve new
drugs and biologics within 30 days of approval of such products. To date, CRLs are not publicly available documents.

Post-Approval Requirements and Commitments

If a product receives regulatory approval, the approval may be significantly limited to specific diseases and dosages or the indicaons for use may otherwise
be limited, which could restrict the commercial value of the product. Further, the FDA may require that certain contraindicaons, warnings or precauons be
included in the product labeling. In addion, condions of NDA approval may include sponsor agreement to PMR or PMC studies, which are designed to
further assess drug safety and

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effecveness  and  may  require  tesng  and  surveillance  programs  to  monitor  the  safety  of  approved  products  that  have  been  commercialized.  These  may
include addional studies, registries, data collecon, analyses, and/or informaon.

Drugs manufactured or distributed pursuant to FDA approvals are subject to pervasive and connuing regulaon by the FDA, including, among other things,
requirements  relang  to  recordkeeping,  periodic  reporng,  product  sampling  and  distribuon,  adversing  and  promoon  and  reporng  of  adverse
experiences with the product. Aer approval, most changes to the approved product, such as adding new indicaons or other labeling claims, are subject to
prior FDA review and approval. There also are connuing, annual user fee requirements for any marketed products and the establishments at which such
products are manufactured, as well as new applicaon fees for supplemental applicaons with clinical data.

In  addion,  drug  manufacturers  and  other  enes  involved  in  the  manufacture  and  distribuon  of  approved  drugs  are  required  to  register  their
establishments with the FDA and state agencies and are subject to periodic unannounced inspecons by the FDA and these state agencies for compliance
with cGMP requirements. Changes to the manufacturing process are strictly regulated and oen require prior FDA approval before being implemented. FDA
regulaons also require invesgaon and correcon of any deviaons from cGMP and impose reporng and documentaon requirements upon the sponsor
and any third-party manufacturers that the sponsor may decide to use. Accordingly, manufacturers must connue to expend me, money, and effort in the
area of producon and quality control to maintain cGMP compliance.

Once an approval is granted, the FDA may withdraw the approval if compliance with regulatory requirements and standards is not maintained or if problems
occur  aer  the  product  reaches  the  market.  Later  discovery  of  previously  unknown  problems  with  a  product,  including  adverse  events  of  unancipated
severity or frequency, or with manufacturing processes, or failure to comply with regulatory requirements, may result in revisions to the approved labeling to
add new safety informaon; imposion of post-market studies or clinical trials to assess new safety risks; or imposion of distribuon or other restricons
under a REMS program. Other potenal consequences include, among other things:

•

•

•

•

•

restricons on the markeng or manufacturing of the product, suspension of the approval, or complete withdrawal of the product from the
market or product recalls;

fines, warning leers or holds on post-approval clinical trials;

refusal of the FDA to approve pending NDAs or supplements to approved NDAs, or suspension or revocaon of product license approvals;

product seizure or detenon, or refusal to permit the import or export of products; or

injuncons or the imposion of civil or criminal penales.

The FDA strictly regulates the markeng, labeling, adversing and promoon of prescripon drug products placed on the market. This regulaon includes,
among other things, standards and regulaons for direct-to-consumer adversing, communicaons regarding unapproved uses, industry-sponsored scienfic
and  educaonal  acvies,  and  promoonal  acvies  involving  the  Internet  and  social  media.  Promoonal  claims  about  a  product  candidate’s  safety  or
effecveness are prohibited before the product candidate is approved. Aer approval, a drug product generally may not be promoted for uses that are not
approved by the FDA or in a manner that is inconsistent with the product’s prescribing informaon. In September 2021, the FDA published final regulaons
which describe the types of evidence that the agency will consider in determining the intended use of a drug product. In addion, in October 2023, the FDA
published dra guidance outlining the agency’s non-binding policies governing the distribuon of scienfic informaon on unapproved uses to healthcare
providers. This dra guidance calls for such communicaons to be truthful, non-misleading, factual, and unbiased and include all informaon necessary for
healthcare providers to interpret the strengths and weaknesses and validity and ulity of the informaon about the unapproved use.

In the U.S., healthcare professionals are generally permied to prescribe drugs for such uses not described in the drug’s labeling, known as off-label uses,
because  the  FDA  does  not  regulate  the  pracce  of  medicine.  However,  FDA  regulaons  impose  rigorous  restricons  on  manufacturers’  communicaons,
prohibing the promoon of off-label uses. It may be permissible, under very specific condions, for a manufacturer to engage in nonpromoonal, truthful
and non-misleading communicaon regarding off-label informaon, such as distribung scienfic or medical journal informaon. In addion, companies may
also promote informaon that it consistent with the prescribing informaon and have the ability to proacvely speak to formulary commiee members of
payors regarding data for an unapproved drug or unapproved uses of an approved drug under some relavely recent guidance from the FDA. Moreover, with
the passage of the Pre-Approval Informaon Exchange Act, or PIE Act, in December 2022, sponsors of products that have not been approved may proacvely
communicate  to  payors  certain  informaon  about  products  in  development  to  help  expedite  paent  access  upon  product  approval.  Previously,  such
communicaons were permied under FDA guidance but the new legislaon explicitly provides protecon to sponsors who convey certain informaon about
products in development to payors, including unapproved uses of approved products. 

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However,  if  a  company  is  found  to  have  promoted  off-label  uses,  it  may  become  subject  to  adverse  public  relaons  and  administrave  and  judicial
enforcement by the FDA, the Department of Jusce, or the Office of the Inspector General of the Department of Health and Human Services, as well as state
authories.  This  could  subject  a  company  to  a  range  of  penales  that  could  have  a  significant  commercial  impact,  including  civil  and  criminal  fines  and
agreements that materially restrict the manner in which a company promotes or distributes drug products. The federal government has levied large civil and
criminal fines against companies for alleged improper promoon and has also requested that companies enter into consent decrees or permanent injuncons
under which specified promoonal conduct is changed or curtailed.

In addion, the distribuon of prescripon pharmaceucal products is subject to a variety of federal and state laws, the most recent of which is sll in the
process of being phased into the U.S. supply chain and regulatory framework. The Prescripon Drug Markeng Act, or PDMA, was the first federal law to set
minimum standards for the registraon and regulaon of drug distributors by the states and to regulate the distribuon of drug samples. Today, both the
PDMA and state laws limit the distribuon of prescripon pharmaceucal product samples and impose requirements to ensure accountability in distribuon.
Congress  more  recently  enacted  the  Drug  Supply  Chain  Security  Act,  or  DSCSA,  which  made  significant  amendments  to  the  FDCA,  including  by  replacing
certain provisions from the PDMA pertaining to wholesale distribuon of prescripon drugs with a more comprehensive statutory scheme. The DSCSA now
requires uniform naonal standards for wholesale distribuon and, for the first me, for third-party logiscs providers; it also provides for preempon of
certain state laws in the areas of licensure and prescripon drug traceability.

Secon 505(b)(2) NDAs

NDAs for most new drug products are based on two full clinical trials which must contain substanal evidence of the safety and efficacy of the proposed new
product  for  the  proposed  use.  These  applicaons  are  submied  under  Secon  505(b)(1)  of  the  FDCA.  The  FDA  is,  however,  authorized  to  approve  an
alternave type of NDA under Secon 505(b)(2) of the FDCA. This type of applicaon allows the sponsor to rely, in part, on the FDA’s previous findings of
safety and efficacy for a similar product, or published literature. Specifically, Secon 505(b)(2) applies to NDAs for a drug for which the invesgaons made to
show whether or not the drug is safe for use and effecve in use and relied upon by the sponsor for approval of the applicaon “were not conducted by or for
the sponsor and for which the sponsor has not obtained a right of reference or use from the person by or for whom the invesgaons were conducted.”

Secon 505(b)(2) authorizes the FDA to approve an NDA based on safety and effecveness data that were not developed by the sponsor. NDAs filed under
Secon  505(b)(2)  may  provide  an  alternate  and  potenally  more  expedious  pathway  to  FDA  approval  for  new  or  improved  formulaons  or  new  uses  of
previously approved products. If the 505(b)(2) sponsor can establish that reliance on the FDA’s previous approval is scienfically appropriate, the sponsor may
eliminate  the  need  to  conduct  certain  preclinical  studies  or  clinical  trials  of  the  new  product.  The  FDA  may  also  require  companies  to  perform  addional
studies or measurements to support the change from the approved product. The FDA may then approve the new product candidate for all or some of the
label indicaons for which the referenced product has been approved, as well as for any new indicaon sought by the Secon 505(b)(2) sponsor. Products
approved under Secon 505(b)(2) are oen referred to as follow-on products.

Abbreviated New Drug Applicaons for Generic Drugs

In 1984, with the passage of the Hatch-Waxman Amendments to the FDCA, Congress established an abbreviated regulatory scheme authorizing the FDA to
approve generic drugs that are shown to contain the same acve ingredients as, and to be bioequivalent to, drugs previously approved by the FDA pursuant
to NDAs. To obtain approval of a generic drug, a sponsor must submit an ANDA to the agency. An ANDA is a comprehensive submission that contains, among
other things, data and informaon pertaining to the acve pharmaceucal ingredient, bioequivalence, drug product formulaon, specificaons and stability
of the generic drug, as well as analycal methods, manufacturing process validaon data and quality control procedures. ANDAs are “abbreviated” because
they  generally  do  not  include  preclinical  and  clinical  data  to  demonstrate  safety  and  effecveness.  Instead,  in  support  of  such  applicaons,  a  generic
manufacturer  may  rely  on  the  preclinical  and  clinical  tesng  previously  conducted  for  a  drug  product  previously  approved  under  an  NDA,  known  as  the
reference-listed drug, or RLD.

Under the Hatch-Waxman Act, the FDA may not approve an ANDA or 505(b)(2) applicaon unl any applicable period of non-patent exclusivity for the RLD
has expired. The FDCA provides a period of five years of non-patent data exclusivity for a new drug containing a new chemical enty, or NCE. For the purposes
of this provision, the FDA has consistently taken the posion that an NCE is a drug that contains no acve moiety that has previously been approved by the
FDA in any other NDA. This interpretaon was confirmed with enactment of the Ensuring Innovaon Act in April 2021. An acve moiety is the molecule or ion
responsible for the physiological or pharmacological acon of the drug substance. In cases where such NCE exclusivity has been granted, a generic or follow-
on drug applicaon may not be filed with the FDA unl the expiraon of five years unless the submission is accompanied by a Paragraph IV cerficaon, in
which case the sponsor may submit its applicaon four years following the original product approval.

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The  FDCA  also  provides  for  a  period  of  three  years  of  exclusivity  if  the  NDA  includes  reports  of  one  or  more  new  clinical  invesgaons,  other  than
bioavailability  or  bioequivalence  studies,  that  were  conducted  by  or  for  the  sponsor  and  are  essenal  to  the  approval  of  the  applicaon.  This  three-year
exclusivity  period  oen  protects  changes  to  a  previously  approved  drug  product,  such  as  a  new  dosage  form,  route  of  administraon,  combinaon  or
indicaon. Three-year exclusivity would be available for a drug product that contains a previously approved acve moiety, provided the statutory requirement
for a new clinical invesgaon is sasfied. Unlike five-year NCE exclusivity, an award of three-year exclusivity does not block the FDA from accepng ANDAs or
505(b)(2)  applicaons  seeking  approval  for  generic  versions  of  the  drug  as  of  the  date  of  approval  of  the  original  drug  product.  The  FDA  typically  makes
decisions about awards of data exclusivity shortly before a product is approved.

The FDA must establish a priority review track for certain generic drugs, requiring the FDA to review a drug applicaon within eight months for a drug that has
three or fewer approved drugs listed in the Orange Book and is no longer protected by any patent or regulatory exclusivies, or is on the FDA’s drug shortage
list. The new legislaon also authorizes FDA to expedite review of ‘‘competor generic therapies’’ or drugs with inadequate generic compeon, including
holding meengs with or providing advice to the drug sponsor prior to submission of the applicaon.

Hatch-Waxman Patent Cerficaon and the 30-Month Stay

As part of the submission of an NDA or certain supplemental applicaons, NDA sponsors are required to list with the FDA each patent with claims that cover
the sponsor’s product or an approved method of using the product. Upon approval of a new drug, each of the patents listed in the applicaon for the drug is
then  published  in  the  Orange  Book.  The  FDA’s  regulaons  governing  patent  lisngs  were  largely  codified  into  law  with  enactment  of  the  Orange  Book
Modernizaon Act in January 2021. When an ANDA sponsor files its applicaon with the FDA, the sponsor is required to cerfy to the FDA concerning any
patents listed for the reference product in the Orange Book. Specifically, the ANDA sponsor must cerfy that: (i) the required patent informaon has not been
filed; (ii) the listed patent has expired; (iii) the listed patent has not expired, but will expire on a parcular date and approval is sought aer patent expiraon;
or (iv) the listed patent is invalid or will not be infringed by the new product. Moreover, to the extent that the Secon 505(b)(2) NDA sponsor is relying on
studies conducted for an already approved product, the sponsor also is required to cerfy to the FDA concerning any patents listed for the NDA-approved
product in the Orange Book to the same extent that an ANDA sponsor would.

If the generic drug or follow-on drug sponsor does not challenge the innovator’s listed patents, FDA will not approve the ANDA or 505(b)(2) applicaon unl
all  the  listed  patents  claiming  the  referenced  product  have  expired.  A  cerficaon  that  the  new  generic  product  will  not  infringe  the  already  approved
product’s listed patents or that such patents are invalid or unenforceable is called a Paragraph IV cerficaon. If the ANDA sponsor has provided a Paragraph
IV cerficaon to the FDA, the sponsor must also send noce of the Paragraph IV cerficaon to the NDA owner and patent holders once the ANDA has been
accepted for filing by the FDA. The NDA owner and patent holders may then iniate a patent infringement lawsuit in response to the noce of the Paragraph
IV cerficaon. The filing of a patent infringement lawsuit within 45 days aer the receipt of a Paragraph IV cerficaon automacally prevents the FDA from
approving the ANDA or 505(b)(2) NDA unl the earliest of 30 months aer the receipt of the Paragraph IV noce, expiraon of the patent or a decision in the
infringement case that is favorable to the ANDA or 505(b)(2) NDA applicaon.

Pediatric Studies and Exclusivity

Pediatric  exclusivity  is  another  type  of  non-patent  markeng  exclusivity  in  the  U.S.  and,  if  granted,  for  drug  products,  provides  for  the  aachment  of  an
addional six months of markeng protecon to the term of any exisng patent or regulatory exclusivity, including the non-patent and orphan exclusivity. This
six-month exclusivity may be granted if an NDA sponsor submits pediatric data that fairly respond to a wrien request from the FDA for such data. The data
do not need to show the product is effecve in the pediatric populaon studied, rather, if the clinical trial is deemed to fairly respond to the FDA’s request,
the  addional  protecon  is  granted.  If  reports  of  requested  pediatric  studies  are  submied  to  and  accepted  by  the  FDA  within  the  statutory  me  limits,
whatever  statutory  or  regulatory  periods  of  exclusivity  or  patent  protecon  cover  the  product  are  extended  by  six  months.  This  is  not  a  patent  term
extension, but it effecvely extends the regulatory period during which the FDA cannot approve another applicaon. With regard to patents, the six-month
pediatric exclusivity period will not aach to any patents for which an ANDA or 505(b)(2) sponsor submied a Paragraph IV patent cerficaon, unless the
NDA sponsor or patent owner first obtains a court determinaon that the patent is valid and infringed by the proposed product.

Patent Term Restoraon and Extension

A patent claiming a new drug product may be eligible for a limited patent term extension under the Hatch-Waxman Act, which permits a patent restoraon of
up to five years for patent term lost during product development and the FDA regulatory review. The restoraon period granted is typically one-half the me
between the effecve date of an IND and the submission date of an NDA, plus the me between the submission date of an NDA and the ulmate approval
date. Patent term restoraon cannot be used to extend the remaining term of a patent past a total of 14 years from the product’s approval

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date. Only one patent applicable to an approved drug product is eligible for the extension, and the applicaon for the extension must be submied prior to
the expiraon of the patent in queson. A patent that covers mulple drugs for which approval is sought can only be extended in connecon with one of the
approvals. The U.S. Patent and Trademark Office reviews and approves the applicaon for any patent term extension or restoraon in consultaon with the
FDA.

Federal and State Data Privacy Laws

There are mulple privacy and data security laws that may impact our business acvies, in the U.S. and in other countries where we conduct trials or where
we may do business in the future. These laws are evolving and may increase both our obligaons and our regulatory risks in the future. In the health care
industry  generally,  under  the  federal  Health  Insurance  Portability  and  Accountability  Act  of  1996,  as  amended  by  the  Health  Informaon  Technology  for
Economic and Clinical Health Act, or HIPAA, the HHS has issued regulaons to protect the privacy and security of protected health informaon, or PHI, used or
disclosed by covered enes including certain healthcare providers, health plans and healthcare clearinghouses. HIPAA also regulates standardizaon of data
content,  codes  and  formats  used  in  healthcare  transacons  and  standardizaon  of  idenfiers  for  health  plans  and  providers.  HIPAA  also  imposes  certain
obligaons on the business associates of covered enes that obtain protected health informaon in providing services to or on behalf of covered enes.
While  we  are  not  a  covered  enty,  as  a  business  associate,  we  could  be  subject  to  penales,  including  criminal  penales,  and  contractual  damages  if  we
knowingly obtain or further disclose PHI from a covered enty, such as a health care provider or clinical research site, and therefore we must ensure the
proper authorizaons are in place before we, or our vendors or business partners, obtain access to any PHI. In addion to federal privacy regulaons, there
are a number of state laws governing confidenality and security of health informaon that may be applicable to our business. In addion to possible federal
civil  and  criminal  penales  for  HIPAA  violaons,  state  aorneys  general  are  authorized  to  file  civil  acons  for  damages  or  injuncons  in  federal  courts  to
enforce  HIPAA  and  seek  aorney’s  fees  and  costs  associated  with  pursuing  federal  civil  acons.  In  addion,  state  aorneys  general  (along  with  private
plainffs) have brought civil acons seeking injuncons and damages resulng from alleged violaons of HIPAA’s privacy and security rules. State aorneys
general also have authority to enforce state privacy and security laws. New laws and regulaons governing privacy and security may be adopted in the future
as well.

In November 2020, California enacted legislaon that has been dubbed the first “GDPR-like” law in the U.S. Known as the California Consumer Privacy Act, or
CCPA, it creates new individual privacy rights for consumers (as that word is broadly defined in the law) and places increased privacy and security obligaons
on enes handling personal data of consumers or households. The CCPA went into effect on January 1, 2020 and requires covered companies to provide
new disclosures to California consumers, provide such consumers rights as it relates to their personal informaon, and allow for a new cause of acon for
data breaches. Addionally, starng on January 1, 2023, the California Privacy Rights Act, or CPRA, significantly modified the CCPA, including by expanding
consumers’  rights,  parcularly  with  respect  to  certain  sensive  personal  informaon  and  creang  new  principles,  such  as  data  minimizaon,  purpose
limitaon, and storage limitaon. The CPRA also created a new state agency that will be vested with authority to implement and enforce the CCPA and the
CPRA. The CCPA and CPRA could impact our business acvies depending on how it is interpreted and exemplifies the vulnerability of our business to not only
cyber threats but also the evolving regulatory environment related to personal data and individually idenfiable health informaon. These provisions may
apply to some of our business acvies.

In addion to California, eleven other states have passed comprehensive privacy laws similar to the CCPA and CPRA. These laws are either in effect or will go
into effect someme before the end of 2026. Like the CCPA and CPRA, these laws create obligaons related to the processing of personal informaon, as well
as special obligaons for the processing of “sensive” data, which includes health data in some cases. Some of the provisions of these laws may apply to our
business acvies. There are also states that are strongly considering or have already passed comprehensive privacy laws during the 2024 legislave sessions
that will go into effect in 2025 and beyond, including New Hampshire and New Jersey. Other states will be considering similar laws in the future, and Congress
has also been debang passing a federal privacy law. There are also states that are specifically regulang health informaon that may affect our business. For
example, Washington state passed a health privacy law in 2023 that will regulate the collecon and sharing of health informaon, and the law also has a
private  right  of  acon,  which  further  increases  the  relevant  compliance  risk.  Conneccut  and  Nevada  have  also  passed  similar  laws  regulang  consumer
health  data,  and  more  states  (such  as  Vermont)  are  considering  such  legislaon  in  2024.  Other  states  will  be  considering  these  laws  in  the  future,  and
Congress  has  also  been  debang  a  proposed  federal  privacy  law.  These  laws  may  impact  our  business  acvies,  including  our  idenficaon  of  research
subjects, relaonships with business partners and ulmately the markeng and distribuon of our products, if and once approved.

Because of the breadth of these laws and the narrowness of the statutory excepons and regulatory safe harbors available under such laws, it is possible that
some  of  our  current  or  future  business  acvies,  including  certain  clinical  research,  sales  and  markeng  pracces  and  the  provision  of  certain  items  and
services to our customers, could be subject to challenge under one or more of such privacy and data security laws. The heightening compliance environment
and  the  need  to  build  and  maintain  robust  and  secure  systems  to  comply  with  different  privacy  compliance  and/or  reporng  requirements  in  mulple
jurisdicons could increase the possibility that a healthcare company may fail to comply fully with one or more of these

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requirements. If our operaons are found to be in violaon of any of the privacy or data security laws or regulaons described above that are applicable to us,
or any other laws that apply to us, we may be subject to penales, including potenally significant criminal, civil and administrave penales, damages, fines,
imprisonment,  contractual  damages,  reputaonal  harm,  diminished  profits  and  future  earnings,  addional  reporng  requirements  and/or  oversight  if  we
become subject to a consent decree or similar agreement to resolve allegaons of non-compliance with these laws, and the curtailment or restructuring of
our  operaons,  any  of  which  could  adversely  affect  our  ability  to  operate  our  business  and  our  results  of  operaons.  To  the  extent  that  any  product
candidates we may develop, once approved, are sold in a foreign country, we may be subject to similar foreign laws.

Review and Approval of Drug Products Outside the U.S.

In order to market any product outside of the U.S., a sponsor must also comply with numerous and varying regulatory requirements of other countries and
jurisdicons  regarding  quality,  safety  and  efficacy  and  governing,  among  other  things,  clinical  trials,  markeng  authorizaon,  commercial  sales  and
distribuon  of  drug  products.  Whether  or  not  it  obtains  FDA  approval  for  a  product,  the  company  would  need  to  obtain  the  necessary  approvals  by  the
comparable foreign regulatory authories before it can commence clinical trials or markeng of the product in those countries or jurisdicons. The approval
process ulmately varies between countries and jurisdicons and can involve addional product tesng and addional administrave review periods. The
me required to obtain approval in other countries and jurisdicons might differ from and be longer than that required to obtain FDA approval. Regulatory
approval in one country or jurisdicon does not ensure regulatory approval in another, but a failure or delay in obtaining regulatory approval in one country
or jurisdicon may negavely impact the regulatory process in others.

Non-clinical Studies

Non-clinical  studies  are  performed  to  demonstrate  the  health  or  environmental  safety  of  new  chemical  or  biological  substances.  Non-clinical  (pharmaco-
toxicological)  studies  must  be  conducted  in  compliance  with  the  principles  of  GLP  as  set  forth  in  EU  Direcve  2004/10/EC  (unless  otherwise  jusfied  for
certain parcular medicinal products such as, for example, radio-pharmaceucal precursors for radio-labeling purposes). In parcular, non-clinical studies,
both in vitro and in vivo, must be planned, performed, monitored, recorded, reported and archived in accordance with the GLP principles, which define a set
of  rules  and  criteria  for  a  quality  system  for  the  organizaonal  process  and  the  condions  for  non-clinical  studies.  These  GLP  standards  reflect  the
Organizaon for Economic Co-operaon and Development requirements.

Clinical Trial Approval in the EU

On January 31, 2022, the Clinical Trials Regulaon (EU) No 536/2014 became effecve in the EU and replaced the prior Clinical Trials Direcve 2001/20/EC.
The  Clinical  Trials  Regulaon  aims  to  simplify  and  streamline  the  authorizaon,  conduct  and  transparency  of  clinical  trials  in  the  EU.  Under  the  new
coordinated procedure for the approval of clinical trials, the sponsor of a clinical trial to be conducted in more than one Member State of the EU, or an EU
Member State, will only be required to submit a single applicaon for approval. The submission will be made through the Clinical Trials Informaon System, a
new clinical trials portal overseen by the EMA and available to clinical trial sponsors, competent authories of the EU Member States and the public.

Beyond streamlining the process, the new regulaon includes a single set of documents to be prepared and submied for the applicaon as well as simplified
reporng procedures for clinical trial sponsors, and a harmonized procedure for the assessment of applicaons for clinical trials, which is divided in two parts.
Part I is assessed by the competent authories of all EU Member States in which an applicaon for authorizaon of a clinical trial has been submied, or EU
Member States concerned. Part II is assessed separately by each EU Member State concerned. Strict deadlines have been established for the assessment of
clinical trial applicaons. The role of the relevant ethics commiees in the assessment procedure will connue to be governed by the naonal law of the EU
Member State concerned. However, overall related melines will be defined by the Clinical Trials Regulaon.

The Clinical Trials Regulaon did not change the preexisng requirement that a sponsor must obtain prior approval from the competent naonal authority of
the EU Member State in which the clinical trial is to be conducted. If the clinical trial is conducted in different EU Member States, the competent authories in
each of these EU Member States must provide their approval for the conduct of the clinical trial. Furthermore, the sponsor may only start a clinical trial at a
specific clinical site aer the applicable ethics commiee has issued a favorable opinion.

Pares conducng certain clinical trials must, as in the U.S., post clinical trial informaon in the EU at the EudraCT website: hps://eudract.ema.europa.eu.

PRIME Designaon in the European Union

In March 2016, the EMA launched an iniave, the PRIority MEdicines, or PRIME, scheme, to facilitate development of product candidates in indicaons,
oen rare, for which few or no therapies currently exist. The PRIME scheme is intended to

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encourage drug development in areas of unmet medical need and provides accelerated assessment of products represenng substanal innovaon reviewed
under the centralized procedure. Products from small- and medium-sized enterprises, or SMEs, may qualify for earlier entry into the PRIME scheme than
larger  companies.  Many  benefits  accrue  to  sponsors  of  product  candidates  with  PRIME  designaon,  including  but  not  limited  to,  early  and  proacve
regulatory  dialogue  with  the  EMA,  frequent  discussions  on  clinical  trial  designs  and  other  development  program  elements,  and  accelerated  markeng
authorizaon  applicaon,  or  MAA,  assessment  once  a  dossier  has  been  submied.  Importantly,  a  dedicated  agency  contact  and  rapporteur  from  the
Commiee for Human Medicinal Products, or CHMP, or Commiee for Advanced Therapies are appointed early in the PRIME scheme, facilitang increased
understanding of the product at the EMA’s commiee level. A kick-off meeng iniates these relaonships and includes a team of muldisciplinary experts at
the EMA to provide guidance on the overall development and regulatory strategies.

Pediatric Studies

Prior to obtaining a markeng authorizaon in the EU, sponsors have to demonstrate compliance with all measures included in an EMA-approved Pediatric
Invesgaon Plan, or PIP, covering all subsets of the pediatric populaon, unless the EMA has granted a product-specific waiver, a class waiver or a deferral
for one or more of the measures included in the PIP. The respecve requirements for all markeng authorizaon procedures are set forth in Regulaon (EC)
No 1901/2006, which is referred to as the Pediatric Regulaon. This requirement also applies when a company wants to add a new indicaon, pharmaceucal
form  or  route  of  administraon  for  a  medicine  that  is  already  authorized.  The  Pediatric  Commiee  of  the  EMA,  or  PDCO,  may  grant  deferrals  for  some
medicines,  allowing  a  company  to  delay  development  of  the  medicine  in  children  unl  there  is  enough  informaon  to  demonstrate  its  effecveness  and
safety in adults. The PDCO may also grant waivers when development of a medicine in children is not needed or is not appropriate because (a) the product is
likely to be ineffecve or unsafe in part or all of the pediatric populaon; (b) the disease or condion occurs only in adult populaon; or (c) the product does
not represent a significant therapeuc benefit over exisng treatments for pediatric populaon. Before a markeng authorizaon applicaon can be filed, or
an exisng markeng authorizaon can be amended, the EMA determines that companies actually comply with the agreed studies and measures listed in
each relevant PIP.

Markeng Authorizaon

To  obtain  markeng  approval  of  a  product  under  EU  regulatory  systems,  a  sponsor  must  submit  an  MAA  either  under  a  centralized  or  decentralized
procedure. The centralized procedure provides for the grant of a single markeng authorizaon by the European Commission that is valid for all EU member
states.  The  centralized  procedure  is  compulsory  for  specific  products,  including  for  medicines  produced  by  certain  biotechnological  processes,  products
designated  as  orphan  medicinal  products,  advanced  therapy  products  and  products  with  a  new  acve  substance  indicated  for  the  treatment  of  certain
diseases.  For  products  with  a  new  acve  substance  indicated  for  the  treatment  of  other  diseases  and  products  that  are  highly  innovave  or  for  which  a
centralized process is in the interest of paents, the centralized procedure may be oponal.

Under  the  centralized  procedure,  the  CHMP  established  at  the  EMA  is  responsible  for  conducng  the  inial  assessment  of  a  product.  The  CHMP  is  also
responsible  for  several  post-authorizaon  and  maintenance  acvies,  such  as  the  assessment  of  modificaons  or  extensions  to  an  exisng  markeng
authorizaon. Under the centralized procedure in the EU, the maximum meframe for the evaluaon of an MAA is 210 days, excluding clock stops, when
addional informaon or wrien or oral explanaon is to be provided by the sponsor in response to quesons of the CHMP. Accelerated evaluaon might be
granted by the CHMP in exceponal cases, when a medicinal product is of major interest from the point of view of public health and in parcular from the
viewpoint of therapeuc innovaon. In this circumstance, the EMA ensures that the opinion of the CHMP is given within 150 days.

The  decentralized  procedure  is  available  to  sponsors  who  wish  to  market  a  product  in  various  EU  Member  States  where  such  product  has  not  received
markeng approval in any EU Member State before. The decentralized procedure provides for approval by one or more other, or concerned, member states
of an assessment of an applicaon performed by one member state designated by the sponsor, known as the reference member state. Under this procedure,
a sponsor submits an applicaon based on idencal dossiers and related materials, including a dra summary of product characteriscs, and dra labeling
and  package  leaflet,  to  the  reference  member  state  and  concerned  member  states.  The  reference  member  state  prepares  a  dra  assessment  report  and
dras of the related materials within 210 days aer receipt of a valid applicaon. Within 90 days of receiving the reference member state’s assessment report
and related materials, each concerned member state must decide whether to approve the assessment report and related materials.

If a member state cannot approve the assessment report and related materials on the grounds of potenal serious risk to public health, the disputed points
are subject to a dispute resoluon mechanism and may eventually be referred to the European Commission, whose decision is binding on all member states.

A markeng authorizaon may be granted only to a sponsor established in the EU. Once the markeng authorizaon is obtained in all member states of the
EU and study results are included in the product informaon, even when negave, the

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product is eligible for six months’ supplementary protecon cerficate extension. For orphan-designated medicinal products, the 10-year period of market
exclusivity is extended to 12 years.

Periods of Authorizaon and Renewals in the EU

A markeng authorizaon is valid for five years, in principle, and it may be renewed aer five years on the basis of a reevaluaon of the risk-benefit balance
by the EMA or by the competent authority of the relevant EU Member State. To that end, the markeng authorizaon holder must provide the EMA or the
relevant competent authority of the EU Member State with a consolidated version of the file in respect of quality, safety and efficacy, including all variaons
introduced  since  the  markeng  authorizaon  was  granted,  at  least  six  months  before  the  markeng  authorizaon  ceases  to  be  valid.  Once  renewed,  the
markeng  authorizaon  is  valid  for  an  unlimited  period,  unless  the  EC  or  the  relevant  competent  authority  of  the  EU  Member  State  decides,  on  jusfied
grounds  relang  to  pharmacovigilance,  to  proceed  with  one  addional  five-year  renewal  period.  Any  markeng  authorizaon  that  is  not  followed  by  the
markeng of the medicinal product on the EU market (in the case of the centralized procedure) or on the market of the EU Member State which delivered the
markeng authorizaon within three years aer authorizaon ceases to be valid.

Post-Approval Requirements

As in the U.S., both markeng authorizaon, or MA, holders and manufacturers of medicinal products are subject to comprehensive regulatory oversight by
the EMA, the EC, and the competent authories of EU Member States. The MA holder must, for example, comply with EU pharmacovigilance legislaon and
its related regulaons and guidelines which entail many requirements for conducng pharmacovigilance, or the assessment and monitoring of the safety of
medicinal  products.  In  parcular,  the  MA  holder  must  establish  and  maintain  a  pharmacovigilance  system  and  appoint  an  individual  qualified  person  for
pharmacovigilance who is responsible for the establishment and maintenance of that system, and oversees the safety profiles of medicinal products and any
emerging  safety  concerns.  Key  obligaons  include  expedited  reporng  of  suspected  serious  adverse  reacons  and  submission  of  periodic  safety  update
reports, or PSURs.

All new MAAs must include a risk management plan, or RMP, describing the risk management system that the company will put in place and documenng
measures to prevent or minimize the risks associated with the product. The regulatory authories may also impose specific obligaons as a condion of the
MA. Such risk-minimizaon measures or post-authorizaon obligaons may include addional safety monitoring, more frequent submission of PSURs, or the
conduct of addional clinical trials or post-authorizaon safety studies.

The manufacturing process for medicinal products in the EU is also highly regulated and regulators may shut down manufacturing facilies that they believe
do  not  comply  with  regulaons.  Manufacturing  requires  a  manufacturing  authorizaon,  and  the  manufacturing  authorizaon  holder  must  comply  with
various requirements set out in the applicable EU laws, including compliance with EU GMP standards when manufacturing medicinal products and API.

In the EU, the adversing and promoon of approved products are subject to laws governing promoon of medicinal products, interacons with physicians,
misleading  and  comparave  adversing,  and  unfair  commercial  pracces.  These  laws  require  that  promoonal  materials  and  adversing  in  relaon  to
medicinal  products  comply  with  the  product’s  Summary  of  Product  Characteriscs,  or  SmPC,  as  approved  by  the  competent  authories.  Promoon  of  a
medicinal product that does not comply with the SmPC is considered to constute off-label promoon, which is prohibited in the EU. Direct-to-consumer
adversing of prescripon medicines is also prohibited in the EU. Although general requirements for adversing and promoon of medicinal products are
established under EU direcves, the details are governed by regulaons in each EU Member State and can differ from one country to another.

The aforemenoned EU rules are generally applicable in the EEA.

Failure  to  comply  with  EU  and  EU  Member  State  laws  that  apply  to  the  conduct  of  clinical  trials,  manufacturing  approval,  MA  of  medicinal  products  and
markeng of such products, both before and aer grant of the MA, manufacturing of pharmaceucal products, statutory health insurance, bribery and an-
corrupon or with other applicable regulatory requirements may result in administrave, civil or criminal penales. These penales could include delays or
refusal to authorize the conduct of clinical trials, or to grant MA, product withdrawals and recalls, product seizures, suspension, withdrawal or variaon of the
MA, total or paral suspension of producon, distribuon, manufacturing or clinical trials, operang restricons, injuncons, suspension of licenses, fines and
criminal penales.

Regulatory Data Exclusivity in the EU

In the EU, innovave medicinal products authorized in the EU on the basis of a full markeng authorizaon applicaon (as opposed to an applicaon for
markeng authorizaon that relies on data available in the markeng authorizaon dossier for another, previously approved, medicinal product) are entled
to eight years of data exclusivity. During this period, sponsors for authorizaon of generics of these innovave products cannot rely on data contained in the
markeng authorizaon dossier submied for the innovave medicinal product. Innovave medicinal products are also entled to a total of ten years’

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market  exclusivity.  During  this  ten-year  period  no  generic  of  this  medicinal  product  can  be  placed  on  the  EU  market.  The  overall  ten-year  period  will  be
extended to a maximum of eleven years if, during the first eight years of those ten years, the markeng authorizaon holder obtains an authorizaon for one
or more new therapeuc indicaons which, during the scienfic evaluaon prior to authorizaon, is held to bring a significant clinical benefit in comparison
with exisng therapies. Even if a compound is considered to be a NCE so that the innovator gains the prescribed period of data exclusivity, another company
may market another version of the product if such company obtained markeng authorizaon based on an MAA with a complete independent data package
of pharmaceucal tests, preclinical tests and clinical trials.

Pediatric Exclusivity

If a sponsor obtains a markeng authorizaon in all EU Member States, or a markeng authorizaon granted in the centralized procedure by the EC, and the
study results for the pediatric populaon are included in the product informaon, even when negave, the medicine is then eligible for an addional six-
month period of qualifying patent protecon through extension of the term of the Supplementary Protecon Cerficate, or SPC, or alternavely a one year
extension of the regulatory market exclusivity from ten to eleven years, as selected by the markeng authorizaon holder.

Access Consorum

In October 2020, the Medicines and Healthcare products Regulatory Agency, or MHRA, joined the Access Consorum along with the Australian Therapeuc
Goods Administraon of Australia, Health Canada, Health Sciences Authority of Singapore and Swissmedic. The consorum is a coalion of these regulatory
authories that work together to promote greater regulatory collaboraon and alignment of regulatory requirements. The consorum’s goal is to maximize
internaonal co-operaon between partners in the consorum, reduce duplicaon, and increase each agency’s capacity to ensure paents have mely access
to high quality, safe and effecve therapeuc products. The MHRA commenced work-sharing applicaons with Access partners on January 1, 2021. Access
Consorum working group members have regular meengs to exchange informaon on regulatory issues and challenges faced by the parcipang regulatory
agencies, including issues on clinical trials, markeng authorizaons, product manufacturing site inspecons, post-markeng surveillance, joint development
of  technical  guidelines  or  regulatory  standards,  and  collaboraon  on  informaon  plaorms.  The  Access  consorum  has  developed  three  authorizaon
procedures: the New Acve Substance and Biosimilar Work Sharing Iniaves and the Generic Medicine Work Sharing Iniave.

General Data Protecon Regulaon

Many countries outside of the U.S. maintain rigorous laws governing the privacy and security of personal informaon. The collecon, use, disclosure, transfer,
or other processing of personal data, including personal health data, regarding individuals who are located in the EEA, and the processing of personal data
that takes place in the EEA, is subject to the European Union General Data Protecon Regulaon, or GDPR, which became effecve on May 25, 2018. The
GDPR is wide-ranging in scope and imposes numerous requirements on companies that process personal data, and it imposes heightened requirements on
companies that process health and other sensive data, such as requiring in many situaons that a company obtain the consent of the individuals to whom
the sensive personal data relate before processing such data. Examples of obligaons imposed by the GDPR on companies processing personal data that fall
within  the  scope  of  the  GDPR  include  providing  informaon  to  individuals  regarding  data  processing  acvies,  implemenng  safeguards  to  protect  the
security and confidenality of personal data, appoinng a data protecon officer, providing noficaon of data breaches and taking certain measures when
engaging third-party processors.

The GDPR also imposes strict rules on the transfer of personal data to countries outside the EEA, including the U.S., and permits data protecon authories to
impose large penales for violaons of the GDPR, including potenal fines of up to €20 million or 4% of annual global revenues, whichever is greater. The
GDPR  also  confers  a  private  right  of  acon  on  data  subjects  and  consumer  associaons  to  lodge  complaints  with  supervisory  authories,  seek  judicial
remedies, and obtain compensaon for damages resulng from violaons of the GDPR. Compliance with the GDPR is a rigorous and me-intensive process
that may increase the cost of doing business or require companies to change their business pracces to ensure full compliance.

There are ongoing concerns about the ability of companies to transfer personal data from the EU to other countries. In July 2020, the Court of Jusce of the
EU, or the CJEU, invalidated the EU-U.S. Privacy Shield framework, one of the mechanisms used to legimize the transfer of personal data from the EEA to the
U.S. The CJEU decision also drew into queson the long-term viability of an alternave means of data transfer, the standard contractual clauses, for transfers
of personal data from the EEA to the U.S. This CJEU decision may lead to increased scruny on data transfers from the EU to the U.S. generally and increase
our costs of compliance with data privacy legislaon as well as our costs of negoang appropriate privacy and security agreements with our vendors and
business partners.

Addionally, in October 2022, U.S. President Biden signed an execuve order to implement a new EU-U.S. Data Privacy Framework, which would serve as a
replacement to the EU-U.S. Privacy Shield. The EU iniated the process to adopt the EU-

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U.S. Data Privacy Framework in December 2022. It is unclear if and when the framework will be finalized and whether it will be challenged in court. The
uncertainty around this issue may further impact our business operaons in the EU.

As with other issues related to Brexit, there are open quesons about how personal data will be protected in the UK and whether personal informaon can
transfer from the EU to the UK Following the withdrawal of the UK from the EU, the UK Data Protecon Act 2018 applies to the processing of personal data
that takes place in the UK and includes parallel obligaons to those set forth by GDPR. While the Data Protecon Act 2018 in the UK that “implements” and
complements the GDPR has achieved Royal Assent on May 23, 2018 and is now effecve in the UK, it is sll unclear whether transfer of data from the EEA to
the UK will remain lawful under GDPR. The UK government has already determined that it considers all EU and EEA member states to be adequate for the
purposes of data protecon, ensuring that data flows from the UK to the EU/EEA remain unaffected. In addion, a recent decision from the EC appears to
deem the UK as being “essenally adequate” for purposes of data transfer from the EU to the UK, although this decision may be re-evaluated in the future.

Beyond GDPR, there are privacy and data security laws in a growing number of countries around the world. While many loosely follow GDPR as a model,
other laws contain different or conflicng provisions. These laws will impact our ability to conduct our business acvies, including both our clinical trials and
any eventual sale and distribuon of commercial products.

Brexit and the Regulatory Framework in the United Kingdom

The  UK’s  withdrawal  from  the  EU  took  place  on  January  31,  2020.  The  EU  and  the  UK  reached  an  agreement  on  their  new  partnership  in  the  Trade  and
Cooperaon Agreement, or the Agreement, which was applied provisionally beginning on January 1, 2021, and which entered into force on May 1, 2021. The
Agreement  focuses  primarily  on  free  trade  by  ensuring  no  tariffs  or  quotas  on  trade  in  goods,  including  healthcare  products  such  as  medicinal  products.
Thereaer,  the  EU  and  the  UK  will  form  two  separate  markets  governed  by  two  disnct  regulatory  and  legal  regimes,  except  that  Northern  Ireland  will
connue to broadly follow EU laws as further described below. As such, the Agreement seeks to minimize barriers to trade in goods while accepng that
border  checks  will  become  inevitable  as  a  consequence  that  the  UK  is  no  longer  part  of  the  single  market.  As  of  January  1,  2021,  the  MHRA  became
responsible for supervising medicines and medical devices in Great Britain, comprising England, Scotland, and Wales under domesc law whereas Northern
Ireland connues to be subject to EU rules under the Northern Ireland Protocol.

On February 27, 2023, the UK government and the EC announced a polical agreement in principle to replace the Northern Ireland Protocol with a new set of
arrangements, known as the “Windsor Framework”. This new framework fundamentally changes the exisng system under the Northern Ireland Protocol,
including  with  respect  to  the  regulaon  of  medicinal  products  in  the  UK  In  parcular,  the  MHRA  will  be  responsible  for  approving  all  medicinal  products
desned for the UK market (i.e., Great Britain and Northern Ireland), and the EMA will no longer have any role in approving medicinal products desned for
Northern Ireland. A single UK-wide MA will be granted by the MHRA for all medicinal products to be sold in the UK, enabling products to be sold in a single
pack and under a single authorizaon throughout the UK. The Windsor Framework was approved by the EU-UK Joint Commiee on March 24, 2023, so the
UK government and the EU will enact legislave measures to bring it into law. On June 9, 2023, the MHRA announced that the medicines aspects of the
Windsor Framework will apply beginning on January 1, 2025. The Human Medicines Regulaons 2012 (SI 2012/1916) (as amended), or HMR, is the primary
legal  instrument  for  the  regulaon  of  medicines  in  the  UK.  The  HMR  has  incorporated  into  the  domesc  law  the  body  of  EU  law  instruments  governing
medicinal products that pre-existed prior to the UK’s withdrawal from the EU.

EU laws which have been transposed into UK law through secondary legislaon connue to be applicable as “retained EU law.” However, new legislaon such
as  the  (EU)  Clinical  Trials  Regulaon  will  not  be  applicable  in  Great  Britain.  Since  a  significant  proporon  of  the  regulatory  framework  for  pharmaceucal
products  in  the  UK  covering  the  quality,  safety,  and  efficacy  of  pharmaceucal  products,  clinical  trials,  MAs,  commercial  sales,  and  distribuon  of
pharmaceucal products is derived from EU direcves and regulaons, Brexit may have a material impact upon the regulatory regime with respect to the
development, manufacture, importaon, approval, and commercializaon of our product candidates in the UK. For example, the UK is no longer covered by
the centralized procedures for obtaining EU-wide MAs from the EMA, and a separate MA will be required to market our product candidates in the UK. A new
internaonal recognion framework has been in place since January 1, 2024, whereby the MHRA will have regard to decisions on the approval of MAs made
by the EMA and certain other regulators when determining an applicaon for a new Great Britain MA.

Pharmaceucal Coverage, Pricing and Reimbursement

In  the  U.S.  and  markets  in  other  countries,  paents  who  are  prescribed  treatments  for  their  condions  and  providers  performing  the  prescribed  services
generally  rely  on  third-party  payors  to  reimburse  all  or  part  of  the  associated  healthcare  costs.  Significant  uncertainty  exists  as  to  the  coverage  and
reimbursement status of products approved by the FDA and other government authories. Thus, even if a product candidate is approved, sales of the product
will depend, in part, on the extent to which third-party payors, including government health programs in the U.S. such as Medicare and Medicaid, commercial
health insurers and managed care organizaons, provide coverage, and establish adequate reimbursement levels for, the

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product.  The  process  for  determining  whether  a  payor  will  provide  coverage  for  a  product  may  be  separate  from  the  process  for  seng  the  price  or
reimbursement rate that the payor will pay for the product once coverage is approved. Third-party payors are increasingly challenging the prices charged,
examining the medical necessity, and reviewing the cost-effecveness of medical products and services and imposing controls to manage costs. Third-party
payors may limit coverage to specific products on an approved list, also known as a formulary, which might not include all of the approved products for a
parcular indicaon. In addion, third-party payors may impose prior authorizaon or step edit requirements requiring paents to have tried other therapies
prior  to  our  products  for  coverage.  Payors  may  also  decline  to  include  our  products  or  product  candidates  on  their  formulary,  which  means  that  unless
healthcare providers seek a medical excepon for coverage, the payors will not pay for the product.

In  order  to  secure  coverage  and  reimbursement  for  any  product  that  might  be  approved  for  sale,  a  company  may  need  to  conduct  expensive
pharmacoeconomic studies in order to demonstrate the medical necessity and cost-effecveness of the product, in addion to the costs required to obtain
FDA or other comparable markeng approvals. Nonetheless, product candidates may not be considered medically necessary or cost effecve. A decision by a
third-party payor not to cover a product candidate could reduce physician ulizaon once the product is approved and have a material adverse effect on
sales,  results  of  operaons  and  financial  condion.  Addionally,  a  payor’s  decision  to  provide  coverage  for  a  product  does  not  imply  that  an  adequate
reimbursement rate will be approved. Further, one payor’s determinaon to provide coverage for a drug product does not assure that other payors will also
provide coverage and reimbursement for the product, and the level of coverage and reimbursement can differ significantly from payor to payor.

Dialysis-related drugs are included in the ESRD prospecve payment system, or PPS, bundled payment and are grouped into funconal categories such as
anemia  management  and  bone  and  mineral  metabolism,  except  that  oral-only  drugs  are  exempted  from  inclusion  unl  2025.  In  a  final  ESRD  PPS  rule
published in October 2019, CMS confirmed that it will expand the TDAPA to most new dialysis drugs approved by the FDA aer January 1, 2020. The TDAPA
provides separate payment for eligible new drugs for two years based on the drug’s Average Sales Price, or ASP, that will be in addion to the base rate in
order to facilitate the adopon of innovave therapies. Although there are several details that need further clarificaon, including precise ming related to
receiving codes to allow for reimbursement under TDAPA, which are assigned on a quarterly basis, the rule provides support for our assumpon that new
anemia treatments, including those in the HIF-PH inhibitor class, will be included in the ESRD PPS bundle and will be eligible for separate payment inially
under TDAPA, and we expect to receive TDAPA designaon for vadadustat six months post-filing acceptance if approved by the FDA.

As an oral drug, Auryxia is covered by Medicare under Part D. Under the ESRD PPS, CMS generally makes a single bundled payment to the dialysis facility for
each dialysis treatment that covers all items and services rounely required for dialysis treatments furnished to Medicare beneficiaries in Medicare-cerfied
ESRD facilies or at their home. The inclusion of oral medicaons without injectable or intravenous equivalents such as Auryxia in the bundled payment was
inially  delayed  by  CMS  unl  January  1,  2014,  and  through  several  subsequent  legislave  acons  has  been  delayed  unl  January  1,  2025.  Absent  further
legislaon or regulaon on this maer, beginning in January 2025, oral ESRD-related drugs without injectable or intravenous equivalents, including Auryxia
and  all  other  phosphate  lowering  medicaons,  will  be  included  in  the  ESRD  bundle  and  separate  Medicare  payment  for  these  drugs  will  no  longer  be
available, as is the case today under Medicare Part D. ESRD facilies may nonetheless receive a TDAPA for new renal dialysis drugs and biological products
that meet certain criteria for a period of two years. The TDAPA will provide separate payment based on the drug’s ASP that will be in addion to the base rate
in order to facilitate the adopon of innovave therapies. There can be no assurances that CMS will not again delay the inclusion of these oral ESRD-related
drugs in the bundled payment. Even if Auryxia is deemed eligible by CMS, revenue for sales of Auryxia could be significantly less in the TDAPA period than it
would be if Auryxia is not bundled into the ESRD PPS. Moreover, in the post-TDAPA period, CMS currently expects to increase the single bundled payment
base rate paid to the dialysis facility for each dialysis treatment to reflect that oral only phosphate lowering drugs will be reimbursed as part of the single
bundled  payment  for  Medicare  paents.  There  can  be  no  assurances  that  any  increase  in  the  single  bundled  payment  base  rate  will  be  sufficient  to
adequately reimburse the dialysis facilies for Auryxia at a price that is profitable for us.

The containment of healthcare costs also has become a priority of federal, state and foreign governments and the prices of drugs have been a focus in this
effort. Governments have shown significant interest in implemenng cost-containment programs, including price controls, restricons on reimbursement and
requirements for substuon of generic products. Adopon of price controls and cost-containment measures, and adopon of more restricve policies in
jurisdicons  with  exisng  controls  and  measures,  could  further  limit  a  company’s  revenue  generated  from  the  sale  of  any  approved  products.  Coverage
policies  and  third-party  reimbursement  rates  may  change  at  any  me.  Even  if  favorable  coverage  and  reimbursement  status  is  aained  for  one  or  more
products for which a company or its collaborators receive markeng approval, less favorable coverage policies and reimbursement rates may be implemented
in the future.

Outside  the  U.S.,  ensuring  adequate  coverage  and  payment  for  a  product  also  involves  challenges.  Pricing  of  prescripon  pharmaceucals  is  subject  to
governmental  control  in  many  countries.  Pricing  negoaons  with  governmental  authories  can  extend  well  beyond  the  receipt  of  regulatory  markeng
approval for a product and may require a clinical trial that compares

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the  cost  effecveness  of  a  product  to  other  available  therapies.  The  conduct  of  such  a  clinical  trial  could  be  expensive  and  result  in  delays  in
commercializaon.

In the EU, pricing and reimbursement schemes vary widely from country to country. Some countries provide that products may be marketed only aer a
reimbursement price has been agreed. Some countries may require the compleon of addional studies that compare the cost-effecveness of a parcular
product  candidate  to  currently  available  therapies  or  so-called  health  technology  assessments,  in  order  to  obtain  reimbursement  or  pricing  approval.  For
example,  the  EU  provides  opons  for  its  EU  Member  States  to  restrict  the  range  of  products  for  which  their  naonal  health  insurance  systems  provide
reimbursement and to control the prices of medicinal products for human use. EU Member States may approve a specific price for a product or it may instead
adopt a system of direct or indirect controls on the profitability of the company placing the product on the market. Other EU Member States allow companies
to fix their own prices for products but monitor and control prescripon volumes and issue guidance to physicians to limit prescripons.

Recently,  many  countries  in  the  EU  have  increased  the  amount  of  discounts  required  on  pharmaceucals  and  these  efforts  could  connue  as  countries
aempt to manage healthcare expenditures, especially in light of the severe fiscal and debt crises experienced by many countries in the EU. The downward
pressure on health care costs in general, parcularly prescripon drugs, has become intense. As a result, increasingly high barriers are being erected to the
entry of new products. Polical, economic and regulatory developments may further complicate pricing negoaons, and pricing negoaons may connue
aer reimbursement has been obtained. Reference pricing used by various EU Member States, and parallel trade, i.e., arbitrage between low-priced and high-
priced EU Member States, can further reduce prices. There can be no assurance that any country that has price controls or reimbursement limitaons for
pharmaceucal products will allow favorable reimbursement and pricing arrangements for any products, if approved in those countries.

Dialysis Organizaons Protocols

Dialysis  organizaons  have  their  own  formularies  that  list  primary  or  preferred  therapeuc  opons  based  on  contracng  status  with  drug  manufacturers.
While  a  prescriber  may  make  their  own  independent  decision  to  prescribe  what  they  determine  most  appropriate  for  a  given  paent,  any  non-formulary
therapeuc opons are only available through an excepon process based on clinical need. Similar to how payor coverage may affect the sales of a product,
formulary status within dialysis organizaons may affect what products are prescribed within that specific organizaon. Therefore, if a product is not on a
formulary, the prescribers within that organizaon may be less likely to prescribe that product or may have a difficult me prescribing that product, resulng
in less sales. Further, one dialysis organizaon’s determinaon to add a product to their formulary does not assure that other dialysis organizaons will also
add the product to theirs. There is always a risk a dialysis organizaon will not contract with a drug manufacturer for a specific product, resulng in that
product not being on that organizaon’s formulary. Addionally, dialysis organizaons typically assess a product’s efficacy before adding it to their formulary.
Their process for assessing a product may differ among organizaons and the ming of such assessment could delay adding such treatment to formulary,
further affecng product sales.

Healthcare Law and Regulaon

Healthcare  providers  and  third-party  payors  play  a  primary  role  in  the  recommendaon  and  prescripon  of  drug  products  that  are  granted  markeng
approval. Arrangements with providers, consultants, third-party payors and customers are subject to broadly applicable fraud and abuse, an-kickback, false
claims  laws,  reporng  of  payments  to  physicians,  teaching  hospitals  and  other  healthcare  providers,  paent  privacy  laws  and  regulaons,  and  other
healthcare laws and regulaons that may constrain business and/or financial arrangements. Restricons under applicable federal and state healthcare laws
and regulaons include the following:

•

•

•

the federal An-Kickback Statute, which prohibits, among other things, persons and enes from knowingly and willfully solicing, offering,
paying, receiving or providing remuneraon, directly or indirectly, in cash or in kind, to induce or reward either the referral of an individual
for,  or  the  purchase,  order  or  recommendaon  of,  any  good  or  service,  for  which  payment  may  be  made,  in  whole  or  in  part,  under  a
federal healthcare program such as Medicare and Medicaid;

the  federal  civil  and  criminal  false  claims  laws,  including  the  civil  False  Claims  Act,  and  civil  monetary  penales  laws,  which  prohibit
individuals or enes from, among other things, knowingly presenng, or causing to be presented, to the federal government, claims for
payment that are false, ficous or fraudulent or knowingly making, using or causing to be made or used a false record or statement to
avoid, decrease or conceal an obligaon to pay money to the federal government

HIPAA, which created addional federal criminal laws that prohibit, among other things, knowingly and willfully execung, or aempng to
execute, a scheme to defraud any healthcare benefit program or making false statements relang to healthcare maers;

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•

•

•

•

•

•

HIPAA,  as  amended  by  the  Health  Informaon  Technology  for  Economic  and  Clinical  Health  Act,  and  their  respecve  implemenng
regulaons, including the Final Omnibus Rule published in January 2013, which impose obligaons, including mandatory contractual terms,
with respect to safeguarding the privacy, security and transmission of individually idenfiable health informaon;

the federal false statements statute, which prohibits knowingly and willfully falsifying, concealing or covering up a material fact or making
any materially false statement in connecon with the delivery of or payment for healthcare benefits, items or services;

the U.S. Foreign Corrupt Pracces Act, or FCPA, which prohibits companies and their intermediaries from making, or offering or promising
to  make  improper  payments  to  non-U.S.  officials  for  the  purpose  of  obtaining  or  retaining  business  or  otherwise  seeking  favorable
treatment;

the federal transparency requirements, known as the federal Physician Payments Sunshine Act (renamed the Open Payments Act), under
the Paent Protecon and Affordable Care Act, as amended by the Health Care Educaon Reconciliaon Act, or ACA, which requires certain
manufacturers of drugs, devices, biologics and medical supplies to report annually to the CMS within the U.S. Department of Health and
Human Services, informaon related to payments and other transfers of value made by that enty to physicians, other healthcare providers
and teaching hospitals, as well as ownership and investment interests held by physicians and their immediate family members;

the PDMA and its implementaon regulaons, as well as the DSCSA, which regulate the distribuon and tracing of prescripon drugs and
prescripon drug samples at the federal level, and set minimum standards for the regulaon of drug distributors by the states; and

analogous state and foreign laws and regulaons, such as state an-kickback and false claims laws, which may apply to healthcare items or
services that are reimbursed by third-party payors, including private insurers, and state gi ban and disclosure law requirements that differ
from the federal Physician Payments Sunshine Act in terms of the nature and type of transfers of value that are reportable and the types of
covered recipients.

Violaons of these laws are punishable by criminal and/or civil sancons, including, in some instances, exclusion from parcipaon in federal and state health
care programs, such as Medicare and Medicaid. Ensuring compliance is me consuming and costly. Similar healthcare laws and regulaons exist in the EU and
other jurisdicons, including reporng requirements detailing interacons with and payments to healthcare providers and laws governing the privacy and
security of personal informaon.

Some  state  laws  require  pharmaceucal  companies  to  comply  with  the  pharmaceucal  industry’s  voluntary  compliance  guidelines,  such  as  the
Pharmaceucal Research and Manufacturers of America Code on Interacons with Health Care Professionals, known as the PhRMA Code. State and foreign
laws also govern the privacy and security of health informaon in some circumstances, many of which differ from each other in significant ways and oen are
not preempted by HIPAA, thus complicang compliance efforts.

Healthcare Reform in the U.S.

A primary trend in the U.S. healthcare industry and elsewhere is cost containment. There have been a number of federal and state proposals during the last
few  years  regarding  the  pricing  of  pharmaceucal  and  biopharmaceucal  products,  liming  coverage  and  reimbursement  for  drugs  and  other  medical
products, government control and other changes to the healthcare system in the U.S.

By way of example, the U.S. and state governments connue to propose and pass legislaon designed to reduce the cost of healthcare.

In  March  2010,  the  U.S.  Congress  enacted  the  ACA,  which,  among  other  things,  includes  changes  to  the  coverage  and  payment  for  products  under
government  health  care  programs.  Other  legislave  changes  have  been  proposed  and  adopted  since  the  ACA  was  enacted.  In  August  2011,  the  Budget
Control Act of 2011, among other things, created measures for spending reducons by Congress. A Joint Select Commiee on Deficit Reducon, tasked with
recommending a targeted deficit reducon of at least $1.2 trillion for the years 2013 through 2021, was unable to reach required goals, thereby triggering the
legislaon’s automac reducon to several government programs. This includes aggregate reducons of Medicare payments to providers of up to 2% per
fiscal  year,  which  will  remain  in  effect  through  2031  pursuant  to  the  Coronavirus  Aid,  Relief  and  Economic  Security  Act,  or  CARES  Act.  Under  current
legislaon, the actual reducons in Medicare payments may vary up to 4%.

The  Consolidated  Appropriaons  Act,  which  was  signed  into  law  by  President  Biden  in  December  2022,  made  several  changes  to  sequestraon  of  the
Medicare program. Secon 1001 of the Consolidated Appropriaons Act delays the 4% Statutory Pay-As-You-Go Act of 2010 sequester for two years, through
the end of calendar year 2024. Triggered by enactment of the

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American Rescue Plan Act of 2021, the 4% cut to the Medicare program would have taken effect in January 2023. The Consolidated Appropriaons Act’s
health care offset tle includes Secon 4163, which extends the 2% Budget Control Act of 2011 Medicare sequester for six months into fiscal year 2032 and
lowers the payment reducon percentages in fiscal years 2030 and 2031.

Since enactment of the ACA, there have been, and connue to be, numerous legal challenges and Congressional acons to repeal and replace provisions of
the law. For example, with enactment of the Tax Cuts and Jobs Act of 2017, or the Tax Act, which was signed by the prior administraon on December 22,
2017, Congress repealed the “individual mandate.” The repeal of this provision, which requires most Americans to carry a minimal level of health insurance,
became effecve in 2019. On November 10, 2020, the U.S. Supreme Court heard oral arguments as to whether the individual mandate poron of the ACA is
an essenal and inseverable feature of the ACA, and therefore because the mandate was repealed as part of the Tax Act, the remaining provisions of the ACA
are invalid as well. On February 10, 2021, the Biden Administraon withdrew the federal government’s support for overturning the ACA. On June 17, 2021,
the Supreme Court struck down the lower court rulings finding that the plainffs did not have standing to challenge the constuonality of the ACA. Ligaon
and legislaon over the ACA are likely to connue, with unpredictable and uncertain results.

The prior administraon also took execuve acons to undermine or delay implementaon of the ACA, including direcng federal agencies with authories
and responsibilies under the ACA to waive, defer, grant exempons from, or delay the implementaon of any provision of the ACA that would impose a fiscal
or regulatory burden on states, individuals, healthcare providers, health insurers, or manufacturers of pharmaceucals or medical devices. On January 28,
2021, however, President Biden rescinded those orders and issued a new execuve order that directs federal agencies to reconsider rules and other policies
that  limit  access  to  healthcare,  and  consider  acons  that  will  protect  and  strengthen  that  access.  Under  this  order,  federal  agencies  are  directed  to  re-
examine:  policies  that  undermine  protecons  for  people  with  pre-exisng  condions,  including  complicaons  related  to  COVID-19;  demonstraons  and
waivers under Medicaid and the ACA that may reduce coverage or undermine the programs, including work requirements; policies that undermine the Health
Insurance Marketplace or other markets for health insurance; policies that make it more difficult to enroll in Medicaid and under the ACA; and policies that
reduce affordability of coverage or financial assistance, including for dependents.

Pharmaceucal Prices in the U.S.

The prices of prescripon pharmaceucals have also been the subject of considerable discussion in the U.S. There have been several recent U.S. congressional
inquiries, as well as proposed and enacted state and federal legislaon designed to, among other things, bring more transparency to pharmaceucal pricing,
review the relaonship between pricing and manufacturer paent programs, and reduce the costs of pharmaceucals under Medicare and Medicaid. In 2020,
the prior administraon issued several execuve orders intended to lower the costs of prescripon products and certain provisions in these orders have been
incorporated into regulaons. These regulaons include an interim final rule implemenng a most favored naon model for prices that would e Medicare
Part B payments for certain physician-administered pharmaceucals to the lowest price paid in other economically advanced countries, effecve January 1,
2021. That rule, however, has been subject to a naonwide preliminary injuncon and, on December 29, 2021, CMS issued a final rule to rescind it. With
issuance  of  this  rule,  CMS  stated  that  it  will  explore  all  opons  to  incorporate  value  into  payments  for  Medicare  Part  B  pharmaceucals  and  improve
beneficiaries' access to evidence-based care.

In addion, in October 2020, HHS and the FDA published a final rule allowing states and other enes to develop a Secon 804 Importaon Program, or SIP,
to import certain prescripon drugs from Canada into the U.S. That regulaon was challenged in a lawsuit by the Pharmaceucal Research and Manufacturers
of America, or PhRMA, but the case was dismissed by a federal district court in February 2023 aer the court found that PhRMA did not have standing to sue
HHS. Nine states (Vermont, Colorado, Florida, Maine, New Mexico, New Hampshire, North Dakota, Texas and Wisconsin) have passed laws allowing for the
importaon of drugs from Canada. Certain of these states have submied Secon 804 Importaon Program proposals and are awaing FDA approval. On
January 5, 2023, the FDA approved Florida’s plan for Canadian drug importaon.

Further, the HHS finalized a regulaon removing safe harbor protecon for price reducons from pharmaceucal manufacturers to plan sponsors under Part
D, either directly or through pharmacy benefit managers, unless the price reducon is required by law. The final rule would also eliminate the current safe
harbor for Medicare drug rebates and create new safe harbors for beneficiary point-of-sale discounts and pharmacy benefit manager service fees. It originally
was set to go into effect on January 1, 2022, but with passage of the Inflaon Reducon Act of 2022, or IRA, has been delayed by Congress to January 1, 2032.

On July 9, 2021, President Biden signed Execuve Order 14063, which focuses on, among other things, the price of pharmaceucals. The Order directs HHS to
create a plan within 45 days to combat “excessive pricing of prescripon pharmaceucals and enhance domesc pharmaceucal supply chains, to reduce the
prices  paid  by  the  federal  government  for  such  pharmaceucals,  and  to  address  the  recurrent  problem  of  price  gouging.”  On  September  9,  2021,  HHS
released its plan to reduce pharmaceucal prices. The key features of that plan are to: (a) make pharmaceucal prices more affordable

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and equitable for all consumers and throughout the health care system by supporng pharmaceucal price negoaons with manufacturers; (b) improve and
promote compeon throughout the prescripon pharmaceucal industry by supporng market changes that strengthen supply chains, promote biosimilars
and generic drugs, and increase transparency; and (c) foster scienfic innovaon to promote beer healthcare and improve health by supporng public and
private research and making sure that market incenves promote discovery of valuable and accessible new treatments.

The IRA has implicaons for Medicare Part D, which is a program available to individuals who are entled to Medicare Part A or enrolled in Medicare Part B to
give them the opon of paying a monthly premium for outpaent prescripon drug coverage. Among other things, the IRA requires manufacturers of certain
drugs to engage in price negoaons with Medicare (beginning in 2026), with prices that can be negoated subject to a cap; imposes rebates under Medicare
Part B and Medicare Part D to penalize price increases that outpace inflaon (first due in 2023); and replaces the Part D coverage gap discount program with a
new discounng program (beginning in 2025). The IRA permits the Secretary of HHS to implement many of these provisions through guidance, as opposed to
regulaon, for the inial years.

Specifically,  with  respect  to  price  negoaons,  Congress  authorized  Medicare  to  negoate  lower  prices  for  certain  costly  single-source  drug  and  biologic
products that do not have compeng generics or biosimilars and are reimbursed under Medicare Part B and Part D. CMS may negoate prices for ten high-
cost drugs paid for by Medicare Part D starng in 2026, followed by 15 Part D drugs in 2027, 15 Part B or Part D drugs in 2028, and 20 Part B or Part D drugs in
2029 and beyond. This provision applies to drug products that have been approved for at least 9 years and biologics that have been licensed for 13 years, but
it does not apply to drugs and biologics that have been approved for a single rare disease or condion. Further, the legislaon subjects drug manufacturers to
civil monetary penales and a potenal excise tax for failing to comply with the legislaon by offering a price that is not equal to or less than the negoated
“maximum fair price” under the law or for taking price increases that exceed inflaon. The legislaon also requires manufacturers to pay rebates for drugs in
Medicare Part D whose price increases exceed inflaon. The new law also caps Medicare out-of-pocket drug costs at an esmated $4,000 a year in 2024 and,
thereaer beginning in 2025, at $2,000 a year.

On  June  6,  2023,  Merck  filed  a  lawsuit  against  HHS  and  CMS  asserng  that,  among  other  things,  the  IRA’s  Drug  Price  Negoaon  Program  for  Medicare
constutes an uncompensated taking in violaon of the Fih Amendment of the Constuon. Subsequently, a number of other pares, including the U.S.
Chamber  of  Commerce,  Bristol  Myers  Squibb  Company,  the  Pharmaceucal  Research  and  Manufacturers  of  America,  Astellas,  Novo  Nordisk,  Janssen
Pharmaceucals, Novars, AstraZeneca and Boehringer Ingelheim, also filed lawsuits in various courts with similar constuonal claims against HHS and CMS.
Ligaon involving these and other provisions of the IRA will connue with unpredictable and uncertain results.

At the state level, individual states are increasingly aggressive in passing legislaon and implemenng regulaons designed to control pharmaceucal and
biological  product  pricing,  including  price  or  paent  reimbursement  constraints,  discounts,  restricons  on  certain  product  access  and  markeng  cost
disclosure and transparency measures, and, in some cases, designed to encourage importaon from other countries and bulk purchasing. A number of states,
for  example,  require  drug  manufacturers  and  other  enes  in  the  drug  supply  chain,  including  health  carriers,  pharmacy  benefit  managers,  wholesale
distributors, to disclose informaon about pricing of pharmaceucals. In addion, regional healthcare organizaons and individual hospitals are increasingly
using bidding procedures to determine what pharmaceucal products and which suppliers will be included in their prescripon pharmaceucal and other
healthcare programs. These measures could reduce the ulmate demand for our products, once approved, or put pressure on our product pricing. We expect
that  addional  state  and  federal  healthcare  reform  measures  will  be  adopted  in  the  future,  any  of  which  could  limit  the  amounts  that  federal  and  state
governments will pay for healthcare products and services, which could result in reduced demand for our product candidates or addional pricing pressures.

Healthcare Reform and Pharmaceucal Prices in the EU

In  the  EU,  similar  polical,  economic,  and  regulatory  developments  to  those  in  the  U.S.  may  affect  our  ability  to  profitably  commercialize  our  product
candidates,  if  approved.  In  many  countries,  including  those  of  the  EU,  the  pricing  of  prescripon  pharmaceucals  is  subject  to  governmental  control  and
access. In these countries, pricing negoaons with governmental authories can take considerable me aer the receipt of an MA. To obtain reimbursement
or pricing approval in some countries, pharmaceucal firms may be required to conduct a clinical trial that compares the cost-effecveness of the product to
other available therapies. In addion to connuing pressure on prices and cost containment measures, legislave developments at the EU or EU Member
State level may result in significant addional requirements or obstacles. The delivery of healthcare in the EU, including the establishment and operaon of
health  services  and  the  pricing  and  reimbursement  of  medicines,  is  almost  exclusively  a  maer  for  naonal,  rather  than  EU,  law  and  policy.  Naonal
governments  and  health  service  providers  have  different  priories  and  approaches  to  the  delivery  of  health  care  and  the  pricing  and  reimbursement  of
products in that context. In general, however, the healthcare budgetary constraints in most EU Member States have resulted in restricons on the pricing and
reimbursement  of  medicines  by  relevant  health  service  providers.  Coupled  with  ever-increasing  EU  and  naonal  regulatory  burdens  on  those  wishing  to
develop and market products, this could restrict or

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regulate post-approval acvies and affect the ability of pharmaceucal companies to commercialize their products. In internaonal markets, reimbursement
and healthcare payment systems vary significantly by country, and many countries have instuted price ceilings on specific products and therapies.

In the EU, potenal reducons in prices and changes in reimbursement levels could be the result of different factors, including reference pricing used by
various EU Member States, parallel distribuon and parallel trade can further reduce prices. It could also result from the applicaon of external reference
pricing mechanisms, which consist of arbitrage between low-priced and high-priced EU Member States. There can be no assurance that any country that has
price  controls  or  reimbursement  limitaons  for  pharmaceucal  products  will  allow  favorable  reimbursement  and  pricing  arrangements  for  any  product
candidates, if approved in those countries.

Health technology assessment, or HTA, of medicinal products in the EU is an essenal element of the pricing and reimbursement decision-making process in a
number of EU Member States. The outcome of HTA has a direct impact on the pricing and reimbursement status granted to the medicinal product. A negave
HTA by a leading and recognized HTA body concerning a medicinal product could undermine the prospects to obtain reimbursement for such product not only
in the EU Member State in which the negave assessment was issued, but also in other EU Member States.

In 2011, Direcve 2011/24/EU was adopted at the EU level. This direcve establishes a voluntary network of naonal authories or bodies responsible for
HTA in the individual EU Member States. The network facilitates and supports the exchange of scienfic informaon concerning HTAs. Further to this, on
December 13, 2021, Regulaon No 2021/2282 on HTA, amending Direcve 2011/24/EU, was adopted. While the regulaon entered into force in January
2022, it will only begin to apply from January 2025 onwards, with preparatory and implementaon-related steps to take place in the interim. Once applicable,
it  will  have  a  phased  implementaon  depending  on  the  concerned  products.  The  regulaon  intends  to  boost  cooperaon  among  EU  Member  States  in
assessing health technologies, including new medicinal products as well as certain high-risk medical devices, and provide the basis for cooperaon at the EU
level for joint clinical assessments in these areas. It will permit EU Member States to use common HTA tools, methodologies, and procedures across the EU,
working together in four main areas, including joint clinical assessment of the innovave health technologies with the highest potenal impact for paents,
joint scienfic consultaons whereby developers can seek advice from HTA authories, idenficaon of emerging health technologies to idenfy promising
technologies  early,  and  connuing  voluntary  cooperaon  in  other  areas.  Individual  EU  Member  States  will  connue  to  be  responsible  for  assessing  non-
clinical (e.g., economic, social, ethical) aspects of health technology, and making decisions on pricing and reimbursement.

Laws Relang to Foreign Trade

We  are  subject  to  various  federal  and  foreign  laws  that  govern  our  internaonal  business  pracces.  These  laws  include  the  FCPA,  which  prohibits  U.S.
companies  and  their  representaves  from  paying,  offering  to  pay,  promising,  or  authorizing  the  payment  of  anything  of  value  to  any  foreign  government
official, government staff member, polical party, or polical candidate for the purposes of obtaining or retaining business, or to otherwise obtain favorable
treatment  or  influence  a  person  working  in  an  official  capacity.  In  many  countries,  the  health  care  professionals  we  regularly  interact  with  may  meet  the
FCPA’s definion of a foreign government official. Addionally, interacons with or on the part of our partners, collaborators, contract research organizaons,
vendors or other agents may also implicate the FCPA. The FCPA also requires public companies to make and keep books and records that accurately and fairly
reflect their transacons and to devise and maintain an adequate system of internal accounng controls. Compliance with the FCPA is expensive and difficult,
parcularly  in  countries  in  which  corrupon  is  a  recognized  problem.  In  addion,  the  FCPA  presents  unique  challenges  in  the  pharmaceucal  industry
because, in many countries, hospitals are operated by the government, and doctors and other hospital employees are considered foreign officials. Certain
payments made by pharmaceucal companies to hospitals in connecon with clinical trials and other work have been deemed to be improper payments to
government officials and have led to FCPA enforcement acons.

Our internaonal operaons could also be subject to compliance with naonal laws of other countries, such as the United Kingdom Bribery Act. of 2010, or
UK Bribery Act. The UK Bribery Act applies to any company “carrying on business” in the UK, irrespecve of where the offending conduct occurs. The UK
Bribery  Act  applies  to  bribery  acvies  both  in  the  public  and  private  sector  and  prohibits  the  provision  of  an  “advantage”  intended  to  induce  or  reward
“improper  performance”  of  the  recipient’s  funcon.  The  failure  by  a  company  to  prevent  third  pares  from  providing  a  bribe  on  its  behalf  could  also
constute an offense. Penales under the UK Bribery Act include potenally unlimited fines for companies and criminal sancons for corporate officers under
certain circumstances.

There are local anbribery and ancorrupon laws in countries where we are conducng clinical trials, such as Brazil and Russia, and many of these also carry
the risk of significant financial or criminal penales. Our clinical trial operaons could also result in enforcement acons by U.S., UK, or other governmental
authories. There are also trade laws within the U.S. and in other regions that regulate the sale, purchase, import, export, reexport, transfer and shipment of
goods, currency, products, materials, services and technology. Violaons of these laws can lead to serious consequences, including substanal fines.

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Other Regulaons

We are also subject to numerous federal, state and local laws relang to such maers as safe working condions, manufacturing pracces, environmental
protecon, fire hazard control, and disposal of hazardous or potenally hazardous substances. We may incur significant costs to comply with such laws and
regulaons now or in the future.

Seasonality

Fluctuaons in wholesaler inventory levels impact our product sales. In recent years, product revenues during the fourth quarter tend to be stronger than
other quarters as our distributors increase their inventory levels, resulng in inventory draw-down by wholesalers in the subsequent first quarter. In addion,
in December 2022 and December 2023, we changed our contracng strategy which can further impact first quarter sales.

In general, our first quarter usually has lower revenues than the preceding fourth quarter, the second and third quarters have higher revenues than the first
quarter, and the fourth quarter revenues are the highest in the year. While seasonality may affect quarterly comparisons within a fiscal year, it generally is not
material to our annual consolidated results. However, we expect Auryxia to be included in the ESRD bundle starng in January 2025, and coupled with Auryxia
loss exclusivity in March 2025, may impact our customer buying paerns and therefore their buying paerns may be different during 2024 than historical
pracces.

Employees and Human Capital Resources

As of December 31, 2023, we had 167 employees. None of our employees are represented by any collecve bargaining unit. We believe that we maintain
good relaons with our employees.

We face compeon for our personnel from our competors and other companies throughout our industry. Over the last several years, the challenges in
recruing and retaining employees across the pharmaceucal and biotechnology industries have increased substanally due to current industry job market
dynamics.

Retenon, growth, training and development of our employees are integral to our success. We offer compeve compensaon, including base salary and
incenve bonuses. We conduct bi-annual internal and external pay reviews to ensure fair and equitable pay for our employees, which includes an internal pay
equity analysis, as well as a review of our employees' pay against external market data. To foster a stronger sense of ownership and align the interests of
employees  with  shareholders,  we  grant  restricted  stock  units  and  common  stock  opons  to  eligible  employees  under  our  broad-based  stock  incenve
program, and employees may purchase stock pursuant to our employee stock purchase plan. Further, our benefits packages are designed to aract, movate
and  reward  talented  individuals  who  possess  the  skills  necessary  to  support  our  business  objecves,  assist  in  the  achievement  of  our  strategic  goals  and
create value for our stockholders. Our compensaon program is designed to differenate us from our compeon, incenvize achievement of corporate goals
and  individual  performance  and  demonstrate  our  corporate  values.  In  addion,  we  are  commied  to  developing  our  team  members  and  provide
development and leadership opportunies to our employees to culvate talent throughout the Company.

We are commied to our employees’ health, safety and well-being. Our work paradigm is flexible and designed to accommodate a range of work profiles. Our
workforce  is  primarily  hybrid  and  fully  remote,  including  field-based,  with  certain  employees  being  office  based.  We  offer  a  wide  variety  of  compeve
benefits  to  support  our  employees'  physical,  mental  and  financial  well-being.  Our  benefits  package  is  comprehensive  in  coverage  and  offers  opons  to
support all employees in staying healthy, planning for their future and developing their careers. Our management connues to assess and respond to the
evolving needs of our workforce.

Environmental, Social and Governance

Our commitment to diversity, equality and inclusion starts with our execuve leadership. Two members of our Board of Directors are women, and women
comprise approximately 50% of our senior management team. In addion, approximately 25% of our employees are ethnically diverse and one member of
our Board of Directors is African American.

With the goal of ensuring every employee is included, supported and treated equitably, we developed a team (IDEA – Inclusion, Diversity & Equity Alliance) to
support and guide Akebia as a diverse, inclusive and culturally intelligent workplace. Over the past three years this team has worked with execuve leadership
to idenfy areas for growth and educaon and move forward several iniaves that will enable us to connue to build an inclusive workplace and a diverse
workforce. Our other iniaves include learning, coaching, cultural awareness acvies and development opportunies for all of our employees.

Our  Cambridge  office  has  a  Fitwel  Cerficaon,  a  healthy  building  cerficaon  system,  and  is  level  two  cerfied.  Addionally,  we  consolidated  our  office
footprint to reduce our use of energy and other resources and have iniated recycling programs, including single stream recycling and recycling cans at every
desk. Furthermore, we offer a commuter benefit to all of our

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hybrid and office-based employees to encourage employees to use public transportaon and offer bicycle parking free of charge in the onsite garage.

In  addion,  we  support  kidney  paent  communies  where  we  live  and  work.  In  the  U.S.,  we  have  a  paent  services  program,  Akebia  Cares,  designed  to
provide  one-on-one  support  to  help  communicate  individual  benefits  and  available  resources  for  paents  today  facing  financial  obstacles  that  keep  them
from accessing important medicaons. In 2023, we provided over $7.0 million worth of Auryxia for free to approximately 15,000 paents needing assistance.
We  also  have  a  cross-funconal  Sponsorship  Review  Commiee  that  reviews  and  approves  sponsorships  and  donaons  based  on  the  relevance  of  each
projects  to  our  purpose,  business  objecves  and  the  communies  we  serve.  We  support  and  work  closely  with  mulple  kidney  paent  advocacy
organizaons. We believe our involvement with and support of paent advocacy programs demonstrates our commitment to our purpose of beering the life
of each person impacted by kidney disease.

Available Informaon

Our website address is www.akebia.com. The informaon on our website or that may be accessed by links on our website is not incorporated by reference
into this Form 10-K. We make available, free of charge and through our website, our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current
Reports on Form 8-K, and any amendments to any such reports filed or furnished pursuant to Secon 13(a) or 15(d) of the Securies Exchange Act of 1934, as
amended, as soon as reasonably praccable aer they are electronically filed with or furnished to the U.S. Securies and Exchange Commission, or SEC.

Corporate Informaon

Akebia was incorporated in Delaware in 2007 and became a public company in 2014. Our mailing address and principal execuve offices and our laboratory
are located at 245 First Street, Cambridge, Massachuses 02142. Our telephone number is (617) 871-2098.

We  are  required  to  file  annual,  quarterly  and  current  reports,  proxy  statements  and  other  informaon  with  the  SEC.  The  SEC  maintains  a  website  at
www.sec.gov  that  contains  reports,  proxy  and  informaon  statements,  and  other  informaon  regarding  issuers  that  file  electronically  with  the  SEC.  Our
Annual  Reports  on  Form  10-K,  Quarterly  Reports  on  Form  10-Q,  Current  Reports  on  Form  8-K,  proxy  statements,  and  other  informaon,  including
amendments and exhibits to such reports, filed or furnished pursuant to the Securies Exchange Act of 1934 are also available free of charge in the “SEC
Filings” secon of our website located at hp://www.akebia.com, as soon as reasonably praccable aer the reports are electronically filed with or furnished
to the SEC. The informaon on our website is not part of this Annual Report on Form 10-K.

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Item 1A. Risk Factors.

We face a variety of risks and uncertaines in our business. Addional risks and uncertaines not presently known to us or that we currently believe to be
immaterial may also become important factors that affect our business, reputaon, results of operaons, financial condion and stock price which can be
materially and adversely affected. If any of the following risks occurs, our business, financial condion, financial statements, results of operaons and future
growth prospects could be materially and adversely affected.

Risks Related to our Financial Posion, Need for Addional Capital and Growth Strategy

We have incurred significant losses since our incepon and ancipate that we will connue to incur losses and cannot guarantee when, if ever, we will
become profitable or aain posive cash flows.

Investment  in  pharmaceucal  product  development  and  commercializaon  is  highly  speculave  because  it  may  require  upfront  capital  expenditures  and
significant R&D expenses. Despite the investment in assets and R&D, there is significant risk that a product candidate will fail to gain markeng approval or
that an approved product will not be commercially viable. Since our incepon, we have devoted most of our resources to research and development, or R&D,
including our preclinical and clinical development acvies, commercializing Auryxia and providing general and administrave support for these operaons.
We have funded our operaons principally through product sales, payments received from our collaboraon and licensing partners, borrowings under term
loans, sales of our common stock, including through our employee stock purchase plan, a working capital payment from Vifor (Internaonal) Ltd. (now a part
of CSL Limited), or CSL Vifor, and a royalty transacon. Prior to our 2018 merger, or the Merger, with Keryx Biopharmaceucals, Inc., or Keryx, whereby Keryx
became our wholly owned subsidiary, we had no products approved for commercial sale and had not generated any revenue from the sale of products. We
are not currently profitable and we have incurred net losses each year since our incepon, including a net loss of $51.9 million for the year ended December
31, 2023. As of December 31, 2023, we had an accumulated deficit of $1.6 billion. We cannot guarantee when, if ever, we will become profitable.

In March 2022, we received a complete response leer, or CRL, from the United States, or U.S., Food and Drug Administraon, or FDA, regarding our new
drug applicaon, or NDA, for vadadustat, our lead invesgaonal product candidate, for the treatment of anemia associated with CKD. The FDA concluded
that  the  data  in  the  NDA  did  not  support  a  favorable  benefit-risk  assessment  of  vadadustat  for  dialysis  and  non-dialysis  paents.  In  October  2022,  we
submied a Formal Dispute Resoluon Request, or FDRR, to the FDA and focused on the favorable balance between the benefits and risks of vadadustat for
the treatment of anemia due to CKD in adult paents on dialysis in light of safety concerns expressed by the FDA in the CRL for dialysis paents related to the
rate of adjudicated thromboembolic events driven by vascular access thrombosis for vadadustat compared to the acve comparator and the risk of drug-
induced liver injury. In May 2023, the Office of New Drugs, or OND, denied our appeal but provided a path forward for us to resubmit the NDA for vadadustat
for the treatment of anemia due to CKD for dialysis dependent paents without the need for us to generate addional clinical data. In September 2023, we
filed our resubmission to our NDA, and in October 2023, the FDA acknowledged that the resubmission was complete and set a user fee goal date, or PDUFA
date, of March 27, 2024. There can be no assurances that we will obtain approval for vadadustat in a mely manner, on favorable terms, or at all. As a result,
the regulatory approval process for vadadustat in the U.S. is highly uncertain. If we do not obtain approval of vadadustat in the U.S., or if the approval is
delayed, it would have a material adverse impact on our business. Even if we are able to obtain approval, the expense and me to do so could adversely
impact our ability to successfully commercialize vadadustat or conduct our other business operaons and our financial condion could be materially harmed.

Our ability to generate product revenue and achieve profitability depends on our ability to manage expenses and the overall success of Auryxia, vadadustat, if
approved, and any current or future product candidates, including those that may be in-licensed or acquired, which depends on several factors, including:

•

•

•

•

•

our ability to obtain approval for vadadustat in the U.S. in a mely manner or at all;

obtaining adequate or favorable pricing and reimbursement from private and governmental payors for Auryxia, vadadustat, if approved, and any
other product or product candidate, including those that may be in-licensed or acquired;

obtaining and maintaining market acceptance of Auryxia, vadadustat, if approved, and any other product candidate, including those that may be in-
licensed or acquired;

the size of any market in which Auryxia, vadadustat and any other product or product candidate, including those that may be in-licensed or acquired,
receives approval and obtaining adequate market share in those markets;

the ming and scope of markeng approvals for vadadustat, if approved, and any other product candidate, if approved, including those that may be
in-licensed or acquired;

• maintaining markeng approvals for Auryxia, vadadustat, if approved, and any other product, including those that may be in-licensed or acquired;

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•

actual  or  perceived  advantages  or  disadvantages  of  our  products  or  product  candidates  as  compared  to  alternave  treatments,  including  their
respecve safety, tolerability and efficacy profiles, the potenal convenience and ease of administraon and cost;

• maintaining an acceptable safety and tolerability profile of our approved products, including the frequency and severity of any side effects;

•

•

•

•

•

the  willingness  of  the  target  paent  populaon  to  try  new  therapies  and  of  physicians  to  prescribe  these  therapies,  based,  in  part,  on  their
percepon of our clinical trial data and/or the actual or perceived safety, tolerability and efficacy profile;

establishing  and  maintaining  supply  and  manufacturing  relaonships  with  third  pares  that  can  provide  adequate  supplies  of  products  that  are
compliant  with  good  manufacturing  pracces,  or  GMPs,  to  support  the  clinical  development  and  the  market  demand  for  Auryxia,  vadadustat,  if
approved, and any other product and product candidate, including those that may be in-licensed or acquired;

current and future restricons or limitaons on our approved or future indicaons and paent populaons or other adverse regulatory acons or in
the event that the FDA requires Risk Evaluaon and Migaon Strategies, or REMS, or risk management plans that use restricve risk minimizaon
strategies;

the effecveness of our collaborators' and our sales, markeng, manufacturing and distribuon strategies and operaons;

compeng effecvely with any products for the same or similar indicaons as our products;

• maintaining, protecng and expanding our porolio of intellectual property rights, including patents and trade secrets; and

•

the adverse impact of the recent COVID-19 pandemic on CKD paents and the phosphate binder market in which we compete.

Our collaboraon, license and other revenue also depends on our partners’ ability to successfully market and sell vadadustat and Auryxia in the territories in
which they have licensed our products. For example, in May 2023, we entered into a license agreement with MEDICE Arzneimiel Püer GmbH & Co. KG, or
Medice, pursuant to which we granted Medice an exclusive license to develop and commercialize vadadustat for the treatment of anemia in paents with
chronic kidney disease in the European Economic Area, or the EEA, the United Kingdom, Switzerland and Australia, or Medice Territory. If Medice’s launch of
vadadustat in the Medice Territory is delayed or their sales are lower than ancipated, we may not receive the revenue that we expect from Medice on the
ming ancipated, or at all. In addion, under the Second Amended and Restated License Agreement that we entered into with CSL Vifor, in February 2022,
or  the  Vifor Agreement,  we  granted  CSL  Vifor  an  exclusive  license  to  sell  vadadustat  to  Fresenius  Medical  Care  North  America  and  its  affiliates,  including
Fresenius  Kidney  Care  Group  LLC,  to  certain  third-party  dialysis  organizaons  approved  by  us,  to  independent  dialysis  organizaons  that  are  members  of
group purchase organizaons, and to certain non-retail specialty pharmacies in the U.S., which represents a significant poron of the potenal market for
vadadustat. If vadadustat is approved, but CSL Vifor is not successful in commercializing vadadustat in a mely manner, or at all, our expected revenue related
to vadadustat would be adversely impacted.

In addion, pursuant to the Vifor Agreement, CSL Vifor contributed $40.0 million to a working capital facility, or Working Capital Fund, established to parally
fund  our  costs  of  purchasing  pre-launch  vadadustat  inventory  from  our  contract  manufacturers.  The  amount  available  under  the  Working  Capital  Fund  is
reviewed  at  specified  intervals  and  is  adjusted  based  on  a  number  of  factors  including  outstanding  supply  commitments  for  vadadustat  for  the  U.S.  and
agreed upon vadadustat inventory levels held by us for the U.S. Addionally, upon terminaon or expiraon of the Vifor Agreement for any reason other than
convenience by CSL Vifor (including following receipt of the CRL for vadadustat), we will be required to refund the outstanding balance of the Working Capital
Fund on the date of terminaon or expiraon. If we are required to repay all or part of the Working Capital Fund sooner than ancipated, it could have a
material adverse impact on our consolidated financial statements.

Our  ability  to  achieve  profitability  also  depends  on  our  ability  to  manage  our  expenses.  We  expect  to  connue  to  incur  addional  operang  expenses,
including addional R&D expenses related to our pipeline, addional costs related to vadadustat, and R&D and selling, general and administrave expenses
for  ongoing  development  and  commercializaon  of  Auryxia,  which  could  lead  to  operang  losses  for  the  foreseeable  future.  We  will  connue  to  incur
substanal  expenditures  relang  to  connued  commercializaon  and  post-markeng  requirements  for  Auryxia  and  vadadustat,  if  we  are  able  to  obtain
markeng approval for vadadustat, and any other products, including those that may be in-licensed or acquired, as well as costs relang to the R&D of any
other product candidate, including those that may be in-licensed or acquired. Our prior losses have had, and expected future losses will connue to have, an
adverse effect on our stockholders’ (deficit) equity and working capital.

In addion to any further costs not currently contemplated in our operang plan, our ability to achieve profitability and our financial posion will depend, in
part, on the rate of our future expenditures, our ability to obtain approval for vadadustat in

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the U.S., the ming of our product revenue, collaboraon, license and other revenue, the ming and amount of any repayment of the Working Capital Fund
from CSL Vifor, our connued compliance with the terms of the BlackRock Credit Agreement and our ability to obtain addional funding, should it be needed.
In addion, we expect to connue to incur significant expenses if and as we:

•

•

•

connue  our  commercializaon  acvies  for  Auryxia  and  vadadustat,  if  we  are  able  to  obtain  markeng  approval  for  vadadustat  following  our
resubmission to our NDA, and any other product or product candidate, including those that may be in-licensed or acquired;

conduct  and  enroll  paents  in  any  clinical  trials,  including  post-markeng  studies  or  any  other  clinical  trials  for  Auryxia,  vadadustat  or  any  other
product or product candidate, including those that may be in-licensed or acquired;

seek markeng approvals for vadadustat and any other product candidate, including those that may be in-licensed or acquired;

• maintain  markeng  approvals  for  Auryxia  and  vadadustat,  if  we  are  able  to  obtain  markeng  approval  for  vadadustat,  and  any  other  product,

including those that may be in-licensed or acquired;

• manufacture Auryxia, vadadustat and any other product or product candidate, including those that may be in-licensed or acquired, for commercial

sale and clinical trials;

•

•

•

conduct discovery and development acvies for addional product candidates or plaorms that may lead to the discovery of addional product
candidates;

engage  in  transacons,  including  strategic,  merger,  collaboraon,  acquision  and  licensing  transacons,  pursuant  to  which  we  would  market  and
develop commercial products, or develop and commercialize other product candidates and technologies;

repay, and pay any associated pre-payment penales, if applicable, the term loans in an aggregate principal amount of up to $55.0 million, or the
Term Loans, as of January 29, 2024, that were made available to us pursuant to an Agreement for the Provision of a Loan Facility, or the BlackRock
Credit Agreement, with Kreos Capital VII (UK) Limited, which are funds and accounts managed by BlackRock Inc., collecvely, BlackRock;

• make royalty, milestone or other payments under our current and any future in-licensing agreements;

• maintain, protect and expand our intellectual property porolio;

• make decisions with respect to our personnel, including the retenon of key employees;

• make  decisions  with  respect  to  our  infrastructure,  including  to  support  our  operaons  as  a  fully  integrated,  publicly  traded  biopharmaceucal

company; and

•

experience any addional delays or encounter issues with any of the above.

We have and will connue to expend significant resources on our legal proceedings, as described below under Part I, Item 3. Legal Proceedings, or any other
legal proceedings brought by or against us in the future.

Our expenses could increase beyond expectaons if we are required by the FDA, the European Medicines Agency, or the EMA, or other regulatory authories,
or if we otherwise believe it is necessary, to change our manufacturing processes or assays, to amend or replace our study protocols, to perform studies
different from or larger than those currently planned, to conduct any addional clinical trials, whether in order to obtain approval or as a post-approval study,
including any addional clinical trial that we decide to conduct for vadadustat, if there are any delays in compleng our clinical trials or if there are further
delays in or issues with obtaining markeng approval for vadadustat in the U.S. beyond our PDUFA date.

Because of the numerous risks and uncertaines associated with pharmaceucal product development and commercializaon, we are unable to accurately
predict the ming or amount of increased expenses or the associated revenue. The net losses we incur may fluctuate significantly from quarter to quarter and
year to year, such that a period-to-period comparison of our results of operaons may not be a good indicaon of our future performance. In any parcular
quarter, our product revenue, the progress of our clinical development and our operang results could be below the expectaons of securies analysts or
investors, which could cause our stock price to decline.

In addion, our ability to generate revenue would be negavely affected if the size of our addressable paent populaon is not as significant as we esmate,
the indicaon approved by regulatory authories is narrower than we sought or the paent populaon for treatment is narrowed by compeon, physician
choice, coverage or reimbursement, or payor or treatment guidelines. Even though we generate product revenue from Auryxia and royales from Riona and
Vafseo in Japan, may generate royales from Vafseo in Europe and other territories where it is approved, and may generate revenue and royales from the
sale of any products that may be approved in the future, including those that may be in-licensed or acquired, we may never generate revenue and royales
that are significant enough for us to become and remain profitable, and we may need to obtain addional financing to connue to fund our operang plan.

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We  may  require  substanal  addional  financing  to  fund  our  business.  A  failure  to  obtain  this  necessary  capital  when  needed,  or  on  acceptable  terms,
could force us to delay, limit, reduce or terminate our product development or commercializaon efforts.

As of December 31, 2023, our cash and cash equivalents were $42.9 million. We expect to connue to expend substanal amounts of cash for the foreseeable
future as we connue to commercialize Auryxia; pursue approval for vadadustat in the U.S. with the FDA and develop and commercialize vadadustat in the
U.S.,  if  approved;  and  develop  and  commercialize  any  other  product  or  product  candidate,  including  those  that  may  be  in-licensed  or  acquired.  These
expenditures will include costs associated with R&D, manufacturing, potenally obtaining markeng approvals and markeng products approved for sale. In
addion, other unancipated costs may arise. Because the outcomes of our current and ancipated clinical trials are highly uncertain, we cannot reasonably
esmate the actual amount of funding necessary to successfully complete clinical development for any current or future product candidates, including the
outcome of our NDA resubmission, or to complete post-markeng studies for Auryxia and vadadustat, if approved. Our future capital requirements depend
on many factors, including:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

the  scope,  progress,  results  and  costs  of  conducng  clinical  trials  or  any  post-markeng  requirements  or  any  other  clinical  trials  for  Auryxia,
vadadustat and any other product or product candidate, including those that may be in-licensed or acquired;

the cost and ming of commercializaon acvies, including product manufacturing, markeng, sales and distribuon costs, for Auryxia, vadadustat,
if approved, and any other product or product candidate, including those that may be in-licensed or acquired;

the results of our meengs with the FDA, the EMA and other regulatory authories and any consequenal effects, including on ming of and ability
to obtain and maintain markeng approval, study design, study size and resulng operang costs;

any  difficules  or  delays  in  conducng  our  clinical  trials,  or  enrolling  paents  in  our  clinical  trials,  for  Auryxia,  vadadustat  or  any  other  product
candidates;

the  outcome  of  our  efforts  to  obtain  markeng  approval  for  vadadustat  in  the  U.S.  and  in  other  jurisdicons  and  any  other  product  candidates,
including  those  that  may  be  in-licensed  or  acquired,  including  any  addional  clinical  trials  or  post-approval  commitments  imposed  by  regulatory
authories;

the ming of, and the costs involved in obtaining, markeng approvals for vadadustat, including in the U.S. and certain other markets, and any other
product  candidate,  including  those  that  may  be  in-licensed  or  acquired,  including  to  fund  the  preparaon,  filing  and  prosecuon  of  regulatory
submissions;

the costs of maintaining markeng approvals for Auryxia or any other product, including those that may be in-licensed or acquired;

the number of generic versions of Auryxia that enter the market following loss of exclusivity, or LoE, for Auryxia in March 2025, and the ming of,
and the magnitude of, the impact on the product revenue from Auryxia, including the impact on the price of Auryxia;

the cost of securing and validang commercial manufacturing for any of our product candidates, including those that may be in-licensed or acquired,
and  maintaining  our  manufacturing  arrangements  for  Auryxia  and  vadadustat  or  any  other  product,  including  those  that  may  be  in-licensed  or
acquired, or securing and validang addional arrangements;

the costs involved in preparing, filing and prosecung patent applicaons and maintaining, defending and enforcing our intellectual property rights,
including ligaon costs and the outcome of such ligaon;

the costs involved in any legal proceedings to which we are a party;

our status as a publicly traded company on the Nasdaq Capital Market;

our decisions with respect to personnel;

our decisions with respect to infrastructure; and

the extent to which we engage in transacons, including strategic, merger, collaboraon, acquision and licensing transacons, pursuant to which
we could develop and market commercial products, or develop other product candidates and technologies.

We may need to obtain substanal addional financing to fund our business. If we are unable to raise capital when needed or on aracve terms, we could
be forced to delay, reduce or eliminate our R&D programs or any future commercializaon efforts. We failed to mely file our Quarterly Report on Form 10-Q
for the three months ended June 30, 2023, or the Second Quarter 10-Q. Because of that failure to file, we are not currently eligible to file or use a Registraon
Statement on Form S-3. This may make it more difficult for us to conduct a public offering of our securies.

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We believe our exisng cash resources and the cash we expect to generate from product, royalty, supply and license revenues as well as the borrowings and
potenal  future  borrowings  that  are  available  under  the  BlackRock  Credit  Agreement  and  the  working  capital  liability  are  sufficient  to  fund  our  current
operang plan for at least twenty-four months if vadadustat is approved in the U.S and for at least twelve months from filing the Form 10-K, if vadadustat is
not approved in the U.S. However, if our operang performance deteriorates significantly from the levels expected in our operang plan, or if vadadustat is
not approved in the U.S., it would have an adverse effect on our liquidity and capital resources and could affect our ability to connue as a going concern in
the  future.  Our  forecast  of  the  period  of  me  through  which  our  financial  resources  will  be  adequate  to  support  our  operaons  is  a  forward-looking
statement and involves numerous risks and uncertaines, and actual results could vary as a result of a number of factors, many of which are outside our
control.  We  have  based  this  esmate  on  assumpons  that  may  be  substanally  different  than  actual  results,  and  we  could  ulize  our  available  capital
resources  sooner  than  we  currently  expect.  In  addion,  if  we  fail  to  sasfy  any  of  the  covenants  under  the  BlackRock  Credit  Agreement,  and  the  loan  is
accelerated, or if certain pre-specified events occur and we are required to make principal payments to BlackRock sooner than we currently ancipate, such
event could have a material adverse effect on our business. There can be no assurance that the current operang plan will be achieved in the me frame
ancipated by us, or that our cash resources and cash we expect to generate will fund our operang plan for the period ancipated by us, or that addional
funding will be available on terms acceptable to us, or at all.

Any  addional  fundraising  efforts  may  divert  our  management’s  aenon  away  from  their  day-to-day  acvies,  which  may  adversely  affect  our  ability  to
develop and commercialize Auryxia and any other products or product candidates, including vadadustat and those that may be in-licensed or acquired, or to
connue to seek regulatory approval for vadadustat. Also, addional funds may not be available to us in sufficient amounts or on acceptable terms or at all. In
addion, raising funds in the current economic environment may present addional challenges. For example, any sustained disrupon in the capital markets
from  adverse  macroeconomic  condions  and  an  uncertain  geopolical  environment,  such  as  rising  inflaon,  increasing  interest  rates,  slower  economic
growth or recession, global supply chain disrupons, the ongoing Russia-Ukraine war, the war in the Middle East and tensions between China and Taiwan,
could negavely impact our ability to raise capital, and we cannot predict the extent or duraon of such macroeconomic disrupons. If we are unable to raise
addional  capital  in  sufficient  amounts  when  needed  or  on  terms  acceptable  to  us,  we  may  have  to  significantly  delay,  scale  back  or  disconnue  the
development and/or commercializaon of Auryxia and any other products or product candidates, including vadadustat and those that may be in-licensed or
acquired, or to take any acons with respect to vadadustat depending on future decisions with respect to vadadustat in the U.S. Any of these events could
significantly harm our business, financial condion and prospects.

Raising addional capital may cause diluon to our exisng stockholders, restrict our operaons or require us to relinquish rights to our product and
product candidates on unfavorable terms to us.

We expect to finance future cash needs through product revenue and royalty and license revenue, and we may seek to sell public or private equity, enter into
new debt transacons, explore potenal strategic transacons or a combinaon of these approaches or other strategic alternaves. To the extent that we
raise addional capital through the sale of equity or converble debt securies, the ownership interests of our common stockholders will be diluted, our fixed
payment obligaons may increase, any such securies may have rights senior to those of our common stock, and the terms may include liquidaon or other
preferences  and  an-diluon  protecons  that  adversely  affect  the  rights  of  our  common  stockholders.  Addional  debt  financing,  if  available,  may  involve
agreements that would restrict our operaons and potenally impair our compeveness, such as limitaons on our ability to incur addional debt, make
capital expenditures, declare dividends, acquire, sell or license intellectual property rights, and other operang restricons that could adversely impact our
ability to conduct our business. If we raise addional funds through strategic transacons, we may have to relinquish valuable rights to our porolio and
future revenue streams, and enter into agreements that would restrict our operaons and strategic flexibility. If we raise addional funds through strategic
transacons  with  third  pares,  we  may  have  to  do  so  at  an  earlier  stage  than  otherwise  would  be  desirable.  In  connecon  with  any  such  strategic
transacons, we may be required to relinquish valuable rights to our product and product candidates, future revenue streams or research programs or grant
licenses on terms that are not favorable to us. If we are unable to raise addional funds when needed, we may not be able to pursue planned development
and commercializaon acvies and we may need to grant rights to develop and market product candidates that we would otherwise prefer to develop and
market ourselves.

If we fail to comply with the connued lisng requirements of Nasdaq, our common stock may be delisted and the price of our common stock and our
ability to access the capital markets could be negavely impacted.

We must sasfy Nasdaq’s connued lisng requirements, including, among other things, a minimum closing bid price of $1.00 per share and mely filing of all
periodic  financial  reports,  or  risk  delisng,  which  would  have  a  material  adverse  effect  on  our  business.  If  we  fail  to  maintain  compliance  with  Nasdaq's
connued lisng requirements, it could affect our ability to raise capital on acceptable terms, or at all. In the event we are delisted from Nasdaq, the only
established trading market for our common stock would be eliminated, and we would be forced to list our shares on the OTC Markets or another quotaon

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medium,  depending  on  our  ability  to  meet  the  specific  lisng  requirements  of  those  quotaon  systems.  As  a  result,  an  investor  would  likely  find  it  more
difficult to trade or obtain accurate price quotaons for our shares. Delisng would likely also reduce the visibility, liquidity, and value of our common stock,
reduce instuonal investor interest in our Company, and may increase the volality of our common stock. Delisng could also cause a loss of confidence of
potenal industry partners, lenders, and employees, which could further harm our business and our future prospects.

On May 9, 2023, we received a leer from Nasdaq stang that we had not regained compliance with the minimum bid price rule during the compliance
period and was subject to delisng. On May 22, 2023, we received a leer from the Office of General Counsel of Nasdaq informing us that Nasdaq confirmed
that we had regained compliance with the $1.00 per share minimum bid price requirement.

On  August  11,  2023,  we  received  a  noficaon  leer  from  Nasdaq  informing  us  that  since  we  had  not  yet  filed  our  Second  Quarter  10-Q,  we  are  not  in
compliance with Nasdaq's lisng rule requiring mely filing of all required periodic financial reports with the U.S. Securies and Exchange Commission, or the
SEC.  On  August  30,  2023,  we  received  a  leer  from  the  Office  of  General  Counsel  of  Nasdaq  informing  us  that  Nasdaq  confirmed  that  we  had  regained
compliance with Nasdaq's lisng rule requiring mely filing of all required periodic financial reports with the SEC.

Although the minimum bid price deficiency and Nasdaq periodic reporng requirement maers are now closed, there can be no assurance that we will be
able to connue to comply with the Nasdaq connued lisng requirements.

We may not be successful in our efforts to idenfy, acquire, in-license, discover, develop and commercialize addional products or product candidates or
our decisions to priorize the development of certain product candidates over others may not be successful, which could impair our ability to grow.

Although we connue to focus a substanal amount of our efforts on the commercializaon of Auryxia and the pursuit of approval for vadadustat in the U.S.
with the FDA, a key element of our long-term growth strategy is to develop addional product candidates and acquire, in-license, develop and/or market
addional products and product candidates.

Research programs to idenfy product candidates require substanal technical, financial and human resources, regardless of whether product candidates are
ulmately idenfied. Our R&D programs may inially show promise, yet fail to yield product candidates for clinical development or commercializaon for
many reasons, including the following:

•

the research methodology used may not be successful in idenfying potenal indicaons and/or product candidates;

• we may not be able or willing to assemble sufficient resources to acquire or discover addional product candidates;

•

•

•

•

•

•

a product candidate may be shown to have harmful side effects, a lack of efficacy or other characteriscs that indicate that they are unlikely to be
drugs that will receive markeng approval and/or achieve market acceptance;

a product candidate we develop and seek regulatory approval for, including vadadustat, may not be approved by the FDA on a mely basis, or at all;

product candidates we develop may nevertheless be covered by third party patents or other exclusive rights;

the  market  for  a  product  candidate  may  change  during  our  program  so  that  the  connued  development  of  that  product  candidate  is  no  longer
commercially reasonable;

a product candidate may not be capable of being produced in commercial quanes at an acceptable cost, or at all; or

a product candidate may not be accepted as safe and effecve by paents, the medical community, or third party payors, if applicable.

If any of these events occur, we may be forced to abandon our R&D efforts for one or more of our programs, or we may not be able to idenfy, discover,
develop or commercialize addional product candidates, including those that may be in-licensed or acquired, which may have a material adverse effect on
our business.

Because  we  have  limited  financial  and  managerial  resources,  especially  as  a  result  of  the  CRL  for  vadadustat  that  we  received  in  March  2022  and  the
reducons in workforce that we implemented in 2022, we have focused on products, research programs and product candidates for specific indicaons. As a
result, we have had to, and in the future may need to, forgo or delay pursuit of opportunies with other product candidates or for other indicaons, or may
out  license  rights  to  product  candidates,  that  later  prove  to  have  greater  commercial  potenal.  For  example,  as  a  result  of  receipt  of  the  CRL  and
implementaon of the reducons in workforce, we delayed certain research acvies. Our resource allocaon decisions may cause us to fail to capitalize on
viable commercial products or profitable market opportunies on a mely basis, or at all. Our spending on current and future R&D programs and product
candidates for specific indicaons may not yield any commercially viable products.

Because our internal research capabilies are limited, we may be dependent upon other pharmaceucal and biotechnology companies, academic sciensts
and instuons, and other researchers to sell or license product candidates, products or

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technology to us. As a result, our rights to these product candidates may be limited or we may be required to make future payments to such third pares if
we are successful in developing such product candidates. The success of this strategy depends partly upon our ability to idenfy, select, and acquire promising
product candidates and products. The process of idenfying, selecng, negoang and implemenng a license or acquision of a product candidate or an
approved product is lengthy and complex. Other companies, including some with substanally greater financial, markeng and sales resources, may compete
with us for the license or acquision of a product candidate or an approved product. We have limited resources to idenfy and execute the acquision or in-
licensing of third party products, businesses, and technologies and integrate them into our current infrastructure.

Moreover, we may devote resources to potenal acquisions or in-licensing opportunies that are never completed, or we may fail to realize the ancipated
benefits  of  such  efforts.  Any  product  candidate  that  we  acquire  may  require  addional  development  efforts  prior  to  commercial  sale,  including  extensive
clinical tesng and approval by the FDA, the EMA, the Japanese Pharmaceucals and Medical Devices Agency, or PMDA, or other regulatory authories, or
post-approval tesng or other requirements if approved. All product candidates are prone to risks of failure typical of pharmaceucal product development,
including the possibility that a product candidate will not be shown to be sufficiently safe and effecve for approval by regulatory authories. In addion, we
cannot provide assurance that any of our products will be manufactured in a cost effecve manner, achieve market acceptance or not require substanal
post-markeng clinical trials.

Accordingly, there can be no assurance that we will ever be able to idenfy, acquire, in-license or develop suitable addional products or product candidates,
which could materially adversely affect our future growth and prospects. We may focus our efforts and resources on potenal products, product candidates
or other programs that ulmately prove to be unsuccessful.

We may engage in strategic transacons to acquire assets, businesses, or rights to products, product candidates or technologies or form collaboraons or
make investments in other companies or technologies that could harm our operang results, dilute our stockholders’ ownership, increase our debt, or
cause us to incur significant expense.

As  part  of  our  business  strategy,  we  may  engage  in  addional  strategic  transacons  to  expand  and  diversify  our  porolio,  including  through  the  merger,
acquision or in-license of assets, businesses, or rights to products, product candidates or technologies or through strategic alliances or collaboraons, similar
to  the  Merger  and  our  exisng  and  prior  collaboraon  and  license  arrangements.  We  may  not  idenfy  suitable  strategic  transacons,  or  complete  such
transacons in a mely manner, on favorable terms, on a cost-effecve basis, or at all. Moreover, we may devote resources to potenal opportunies that are
never completed or we may incorrectly judge the value or worth of such opportunies. Even if we successfully execute a strategic transacon, we may not be
able  to  realize  the  ancipated  benefits  of  such  transacon  and  may  experience  losses  related  to  our  investments  in  such  transacons.  Integraon  of  an
acquired company or assets into our exisng business may not be successful and may disrupt ongoing operaons, require the hiring of addional personnel
and the implementaon and integraon of addional internal systems and infrastructure, and require management resources that would otherwise focus on
developing our exisng business. Even if we are able to achieve the long-term benefits of a strategic transacon, our expenses and short-term costs may
increase materially and adversely affect our liquidity. Any of the foregoing could have a detrimental effect on our business, results of operaons and financial
condion.  For  example,  on  June  4,  2021,  we  entered  into  a  license  agreement,  the  Cyclerion  Agreement,  with  Cyclerion  Therapeucs  Inc.,  or  Cyclerion,
pursuant  to  which  Cyclerion  granted  us  an  exclusive  global  license  under  certain  intellectual  property  rights  to  research,  develop  and  commercialize
praliciguat, an invesgaonal oral soluble guanylate cyclase, or sGC, smulator. Although we have progressed preclinical studies for praliciguat, we need to do
addional work to manufacture product for clinical trials than originally ancipated before we can iniate the trials, and when the clinical trials are started,
we  may  be  unsuccessful  in  developing  praliciguat.  If  any  of  the  assumpons  that  we  made  in  valuing  the  transacon,  including  the  costs  or  ming  of
development of praliciguat as a result of the addional manufacturing work or otherwise, or the potenal benefits of praliciguat, were incorrect, we may not
recognize the ancipated benefits of the transacon and our business could be harmed.

In addion, future transacons may entail numerous operaonal, financial and legal risks, including:

•

•

•

•

•

incurring substanal debt, diluve issuances of securies or depleon of cash to pay for acquisions;

exposure to known and unknown liabilies, including conngent liabilies, possible intellectual property infringement claims, violaons of laws, tax
liabilies and commercial disputes;

higher than expected acquision and integraon costs;

difficulty in integrang operaons, processes, systems and personnel of any acquired business;

increased amorzaon expenses or, in the case of a write-down of the value of acquired assets, impairment losses, such as the Auryxia intangible
asset  impairment  in  the  second  quarter  of  2020  and  corresponding  adjustments  to  the  esmated  useful  life  of  the  developed  product  rights  for
Auryxia;

•

impairment of relaonships with key suppliers or customers of any acquired business due to changes in management and ownership;

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•

•

•

•

inability to retain personnel, customers, distributors, vendors and other business partners integral to an in-licensed or acquired product, product
candidate or technology;

potenal failure of the due diligence processes to idenfy significant problems, liabilies or other shortcomings or challenges;

entry into indicaons or markets in which we have no or limited development or commercial experience and where competors in such markets
have stronger market posions; and

other challenges associated with managing an increasingly diversified business.

If we are unable to successfully manage any transacon in which we may engage, our ability to develop new products and connue to expand and diversify
our porolio may be limited.

Risks Related to our Financial Arrangements

Our obligaons in connecon with the BlackRock Credit Agreement and requirements and restricons in the BlackRock Credit Agreement could adversely
affect our financial condion and restrict our operaons.

We  entered  into  the  BlackRock  Credit  Agreement,  which  provides  for  a  senior  secured  term  loan  facility,  in  the  aggregate  principal  amount  of  up  to
$55.0 million, or the Term Loan Facility. The inial tranche of $37.0 million, or the Tranche A Loan, closed on January 29, 2024, or the Closing Date. In addion
to the Tranche A Loan, the Term Loan Facility includes addional tranches available as follows: $8.0 million available in a single draw through December 31,
2024, or the Tranche B Loan, and $10.0 million available in a single draw through December 31, 2024, or the Tranche C Loan and, together with the Tranche A
Loan  and  the  Tranche  B  Loan,  the  Term  Loans.  See  Note  7,  Indebtedness,  to  our  audited  consolidated  financial  statements  in  Part  II,  Item  8.  Financial
Statements of this Form 10-K for addional informaon regarding our obligaons under the BlackRock Credit Agreement.

Each Term Loan draw is subject to various condions precedent, including (x) the absence of any defaults or events of default and our connued compliance
with the terms and provisions of the BlackRock Credit Agreement, (y) in the case of the Tranche B Loan and Tranche C Loan, receipt of markeng approval for
vadadustat from the FDA, and (z) in the case of Tranche C, receipt of a certain amount of cumulave gross cash proceeds aer the Closing Date in the form of
equity or equity linked securies in one or more series of transacons. The Term Loan Facility has an inial maturity date of March 31, 2025, which will be
automacally extended to January 29, 2028 if we receive FDA approval on or prior to June 30, 2024, or the Maturity Date. If vadadustat is not approved by
the FDA by June 30, 2024, we will be required to repay the Term Loan Facility sooner than ancipated.

The BlackRock Credit Agreement contains certain representaons and warranes, affirmave covenants, negave covenants, financial covenants, events of
default  and  other  provisions  and  condions  that  are  customarily  required  for  similar  financings.  The  financial  covenants  under  the  BlackRock  Credit
Agreement require us to either (i) maintain cash and cash equivalents, measured as of the last day of each fiscal month, greater than or equal to $15.0 million
or (ii) earn consolidated revenue, measured as of the last day of each fiscal month for the trailing twelve-month period, of $150.0 million. Failure to maintain
compliance  with  these  or  other  covenants  would  result  in  an  event  of  default  under  the  BlackRock  Credit  Agreement,  which  could  result  in  enforcement
acon, including acceleraon of amounts due under the BlackRock Credit Agreement.

The Term Loan Facility will accrue interest at a floang annual rate equal to the sum of (x) term Secured Overnight Financing Rate for a tenor of one month
(subject to a floor of 4.25% per annum) plus (y) a margin of 6.75% per annum (subject to an overall cap of 15.00% per annum on the all-in interest rate).
During the connuance of any payment event of default under the BlackRock Credit Agreement, the interest rate on such overdue sum will automacally
increase  by  an  addional  3.0%  per  annum,  and  may  be  subject  to  an  addional  late  fee  of  2.0%  of  such  overdue  sum. The  Term  Loan  Facility  does  not
amorze during the period commencing on the Closing Date and ending on December 31, 2025 (which was extended to December 31, 2026 at our opon), or
the Interest Only Period. We are required to pay interest and, aer the Interest Only Period, principal on the first calendar day of each month. In the event of
certain  prespecified  events,  the  repayment  schedule  will  be  accelerated.  For  example,  if  FDA  approval  is  not  obtained  on  or  prior  to  June  30,  2024,  the
Interest Only Period will automacally terminate on October 1, 2024, and we will be required to repay the Term Loans in seven equal monthly payments
(comprised of principal and interest), commencing on October 1, 2024 and ending on the Maturity Date. If any of these events occur, and we are required to
repay principal sooner than ancipate, it would have an adverse effect on our business.

In the event there is an acceleraon of our and certain of our subsidiaries’ liabilies under the BlackRock Credit Agreement as a result of an event of default
or  otherwise,  we  may  not  have  sufficient  funds  or  may  be  unable  to  arrange  for  addional  financing  to  repay  the  liabilies  or  to  make  any  accelerated
payments, and BlackRock could seek to enforce security interests in the collateral securing the BlackRock Credit Agreement, which would have a material
adverse effect on our business, financial condion and results of operaons.

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In addion, our obligaons in connecon with the BlackRock Credit Agreement could have addional significant adverse consequences, including, among
other things:

•

•
•

•

restricng our acvies, including limitaons on transferring certain of our assets, engaging in certain transacons, terminang certain agreements,
incurring certain addional indebtedness, creang certain liens, paying cash dividends or making certain other distribuons and investments;

liming our flexibility in planning for, or reacng to, changes in our business and our industry;

placing us at a possible compeve disadvantage compared to our competors who have a smaller amount of debt or competors with comparable
debt at more favorable interest rates; and

liming  our  ability  to  borrow  addional  amounts  for  working  capital,  capital  expenditures,  R&D  efforts,  acquisions,  debt  service  requirements,
execuon of our business strategy and other purposes.

Any of these factors could materially and adversely affect our business, financial condion and results of operaons.

Our Royalty Interest Acquision Agreement with HealthCare Royalty Partners IV, L.P. contains various covenants and other provisions, which, if violated,
could materially adversely affect our financial condion.

In  February  2021,  we  entered  into  a  royalty  interest  acquision  agreement,  or  the  Royalty Agreement,  with  HealthCare  Royalty  Partners  IV,  L.P.,  or  HCR,
pursuant to which we sold to HCR our right to receive royales and sales milestones for vadadustat, collecvely the Royalty Interest Payments, in each case,
payable to us under our Collaboraon Agreement dated December 11, 2015, or the MTPC Agreement, with Mitsubishi Tanabe Pharma Corporaon, or MTPC,
subject to an annual maximum “cap” of $13.0 million, or the Annual Cap, and an aggregate maximum “cap” of $150.0 million, or the Aggregate Cap. Under
the Royalty Agreement, we are required to comply with various covenants, including obligaons to take certain acons, such as acons with respect to the
Royalty  Interest  Payments,  the  MTPC  Agreement,  our  agreement  with  MTPC  for  the  commercial  supply  of  vadadustat  drug  product,  and  our  intellectual
property. In addion, the Royalty Agreement includes customary events of default upon the occurrence of enumerated events, including failure to perform
certain covenants and the occurrence of insolvency events. Upon the occurrence of an event of default, HCR would have the ability to exercise all available
remedies in law and equity, which could have a material adverse effect on our financial condion.

Risks Related to Commercializaon

Our business is substanally dependent on the commercial success of Auryxia and vadadustat, if approved. If we are unable to connue to successfully
commercialize Auryxia or vadadustat, if approved and commercialized, our results of operaons and financial condion will be materially harmed.

Our  business  and  our  ability  to  generate  product  revenue  largely  depend  on  our,  and  our  collaborators’,  ability  to  successfully  commercialize  Auryxia  and
vadadustat. Our ability to generate revenue depends on our ability to execute on our commercializaon plans, and the size of the market for, and the level of
market acceptance of, Auryxia, and vadadustat, if approved, and any other product or product candidate, including those that may be in-licensed or acquired.
If  the  size  of  any  market  for  which  a  product  or  product  candidate  is  approved  decreases  or  is  smaller  than  we  ancipate,  our  revenue  and  results  of
operaons could be materially adversely affected.

Given the concentraon of dialysis clinics in large networks, with DaVita, Inc., or DaVita, and Fresenius Kidney Care Group LLC, accounng for a vast majority
of  the  dialysis  populaon  in  the  U.S.,  treatment  is  usually  driven  by  medical  protocols  that  are  implemented  across  the  enre  network  of  clinics.  Dialysis
organizaons require large data sets to adopt medical protocols. If dialysis organizaons do not add vadadustat, if approved, to their medical protocols in a
mely manner, or at all, our operaons could be materially adversely affected.

If oral phosphate binders, including Auryxia, are included in the end-stage renal disease, or ESRD, Prospecve Payment System, or PPS, bundle payment, it will
take me for dialysis organizaons to implement internal mechanisms to dispense phosphate binders which could divert their aenon from focusing on
other therapeuc areas such as anemia management, which in turn could negavely impact the market for phosphate binders, including Auryxia. In addion,
dialysis organizaons may choose lower cost binders over Auryxia, or binders that may have features or benefits more aligned with the dialysis organizaon's
operaonal acvies, which could negavely impact Auryxia revenue.

In addion, we currently have exclusive rights under a series of patents and patent applicaons to commercialize Auryxia in the U.S. that protect us from
generic drug compeon unl March 2025. Following LoE in March 2025, the number of generic versions of Auryxia that enter the market will affect our
revenue from Auryxia. We believe CMS's decision to include phosphate binders in the dialysis bundle could potenally lead to higher sales of Auryxia aer the
LoE date than in other LoE scenarios, and plan to work with payors and providers to connue the use of Auryxia beyond LoE. However, our ability to connue
to generate revenue from sales of Auryxia following LoE will depend on many factors, including our ability to

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successfully contract with dialysis organizaons, the ming and number of generics that enter the market and other products on the market that we compete
with. If we are unable to maintain sales of Auryxia following LoE, our results of operaons and financial condion will be materially harmed.

We believe our revenue growth was negavely impacted by the recent COVID-19 pandemic in 2021, 2022 and 2023 primarily as the CKD paent populaons
that we serve experienced both high hospitalizaon and mortality rates due to COVID-19, and the pandemic had an adverse impact on the phosphate binder
market in which Auryxia competes. Labor shortages and costs have also adversely impacted dialysis providers. These impacts have refocused clinical efforts in
addressing bone and mineral disorders like hyperphosphatemia to more acute operaonal issues to ensure paents receive dialysis treatments and sll some
paents  have  been  rescheduled  or  missed  treatments  due  to  labor  shortages.  We  believe,  this  and  potenally  other  factors,  led  to  the  reducon  in  the
phosphate binder market, which has not experienced growth since early 2020. While we are unable to quanfy the impact of the recent COVID-19 pandemic
on future revenues and revenue growth, the recent COVID-19 pandemic and the ongoing impacts from the recent COVID-19 pandemic connue to adversely
and disproporonately impact CKD paents and the phosphate binder market. Therefore, we expect the impacts from the pandemic to connue to have a
negave impact on our revenue growth for the foreseeable future.

Market acceptance is also crical to our ability to generate significant product revenue. Any product may achieve only limited market acceptance or none at
all.  If  Auryxia,  or  any  of  our  future  products,  including  vadadustat,  if  approved,  is  not  accepted  by  the  market  to  the  extent  that  we  expect  or  market
acceptance  decreases,  we  may  not  be  able  to  generate  significant  product  revenue  and  our  business  would  be  materially  harmed.  Market  acceptance  of
Auryxia, vadadustat, if approved, or any other approved product depends on a number of factors, including:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

the availability of adequate coverage and reimbursement by, and the availability of discounts, rebates and price concessions to third party payors,
pharmacy benefit managers, or PBMs, and governmental authories;

the safety and efficacy of the product, as demonstrated in clinical trials and in the post-markeng seng;

the prevalence and complicaons of the disease treated by the product;

the  clinical  indicaons  for  which  the  product  is  approved  and  the  product  label  approved  by  regulatory  authories,  including  any  warnings  or
limitaons that may be required on the label as a consequence of potenal safety risks associated with the product;

the countries in which markeng approvals are obtained;

the claims we and our partners are able to make regarding the safety and efficacy of the product;

the success of our physician and paent communicaons and educaon programs;

acceptance by physicians and paents of the product as a safe and effecve treatment and the willingness of the target paent populaon to try
new therapies and of physicians to prescribe new therapies;

for vadadustat, if approved, use at dialysis organizaons and their willingness to include vadadustat in their protocols;

the cost, safety and efficacy of the product in relaon to alternave treatments;

the ming of receipt of markeng approvals and product launch relave to compeng products and potenal generic entrants;

relave convenience and ease of administraon;

the frequency and severity of adverse side effects;

favorable or adverse publicity about our products or favorable or adverse publicity about compeng products;

the effecveness of our and our partners’ sales, markeng, manufacturing and distribuon strategies and operaons; and

the restricons on the use of the product together with other medicaons, if any.

In addion, our ability to generate net product revenue depends on our ability to control the expenses associated with commercializing a product, including
internal  expenses,  manufacturing  costs,  rebates,  product  returns  and  other  adjustments.  We  do  not  have  control  over  many  of  the  expenses  required  to
commercialize our products, and if we experience increased costs or expenses, we may not be able to afford the commercial acvies required to successfully
commercialize  our  products,  which  could  have  an  adverse  effect  on  our  business.  In  addion,  our  net  product  revenue  requires  judgement  and  includes
esmates  for  rebates  and  product  returns,  which  can  fluctuate  from  quarter-to-quarter  and  year-over-year.  If  our  net  product  revenue  is  lower  than
ancipated, including as a result of higher expenses, our business could be harmed.

Several healthcare facilies, including DaVita, have previously restricted access for non-paents as a result of the recent COVID-19 pandemic, resulng in
restricted access for certain members of our sales force. As a result, we connue to engage with some healthcare providers and other customers virtually
where possible. The restricons on our customer-facing

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employees’ in-person interacons with healthcare providers have, and could connue to, negavely impact our access to healthcare providers and ulmately
our sales, including with respect to vadadustat, if approved. Such precauonary measures have since been relaxed at certain healthcare facilies and, as a
result, members of our sales force have resumed in person interacons with those customers. Nevertheless, some restricons remain, and more restricons
may be put in place again due to a resurgence in COVID-19 cases, including those involving new variants of COVID-19, which may be more contagious and
more  severe  than  prior  strains  of  the  virus.  Given  this  uncertain  environment  and  the  disproporonate  impact  of  the  recent  COVID-19  pandemic  on  CKD
paents, we are acvely monitoring the demand in the U.S. for Auryxia and will be for vadadustat, if approved, including the potenal for further declines or
changes in prescripon trends and customer orders, which could have a material adverse effect on our business, results of operaons, and financial condion.

If we are unable to maintain or expand, or, if vadadustat is approved, iniate, sales and markeng capabilies or enter into addional agreements with
third pares, we may not be successful in commercializing Auryxia, vadadustat, if approved, or any other product candidates that may be approved.

In order to market Auryxia and any other approved product, we intend to connue to invest in sales and markeng, which will require substanal effort and
significant  management  and  financial  resources.  We  have  built  a  commercial  infrastructure  and  sales  force  in  the  U.S.  for  Auryxia,  our  only  commercial
product. However, following receipt of the CRL, we implemented a reducon of our workforce in April and May 2022 by approximately 42% across all areas of
the Company (47% inclusive of the closing of the majority of open posions), including several members of our sales and markeng team and management.
In November 2022, we also implemented a reducon of our workforce, by approximately 14% consisng of individuals within our commercial organizaon,
and we shied to a strategic account management focused model for our commercial efforts. If the remaining sales and markeng team cannot successfully
commercialize Auryxia, or if addional sales and markeng employees decide to leave, it could have a material adverse effect on Auryxia revenue and our
financial condion.

If we obtain regulatory approval to market vadadustat in the U.S., we believe that we can leverage the current commercial foundaon for vadadustat in the
U.S., with incremental addional hires in our sales force and medical affairs department, but if we are unable to do so successfully it would materially harm
our business. Addionally, training a sales force to successfully sell and market a new commercial product is expensive and me-consuming and could delay
any  commercial  launch  of  such  product  candidate  or  distract  the  sales  force  from  promong  Auryxia.  We  may  underesmate  the  size  of  the  sales  force
required for a successful product launch and we may need to expand our sales force to a greater extent or earlier than we currently plan and at a higher cost
than we ancipated. In 2021 and early 2022, we incurred commercializaon expenses for vadadustat that were premature or unnecessary as a result of the
receipt  of  the  CRL  for  vadadustat,  and  may  in  the  future  incur  addional  commercializaon  expenses  prematurely  or  unnecessarily  if  we  do  not  receive
markeng approval for vadadustat in the meframe we expect, or at all.

We devote significant effort to recruing individuals with experience in the sales and markeng of pharmaceucal products. Compeon for personnel with
these  skills  is  significant  and  retaining  qualified  personnel  with  experience  in  our  industry  is  difficult.  Further,  our  reducons  in  workforce  may  further
exacerbate  these  condions  and  interfere  with  our  ability  to  find  and  retain  qualified  personnel.  As  a  result,  we  may  not  be  able  to  retain  our  exisng
employees  or  hire  new  employees  quickly  enough  to  meet  our  needs.  At  the  same  me,  we  may  face  high  turnover,  requiring  us  to  expend  me  and
resources to source, train and integrate new employees.

There are risks involved with maintaining our own sales and markeng capabilies, including the following:

•
•

•

potenal inability to recruit, train and retain adequate numbers of effecve sales and markeng personnel;

potenal lack of complementary products to be offered by sales personnel, which may put us at a compeve disadvantage relave to companies
with more extensive product lines, especially as a result of the receipt of the CRL for vadadustat; and

costs and expenses associated with maintaining our own sales and markeng organizaon.

If we are unable to maintain our own sales and markeng capabilies, we will not be successful in commercializing Auryxia, vadadustat, if approved, and any
other product candidate that may be approved.

Furthermore, if we are unable to maintain our arrangements with third pares with respect to sales and markeng, if we are unsuccessful in entering into
addional arrangements with third pares to sell and market our products or we are unable to do so on terms that are favorable to us, or if such third pares
are  unable  to  carry  out  their  obligaons  under  such  arrangements,  it  will  be  difficult  to  successfully  commercialize  our  product  and  product  candidates,
including  vadadustat,  if  approved.  For  example,  if,  in  connecon  with  the  Vifor  Agreement,  we  experience  difficules  with  CSL  Vifor,  or  if  CSL  Vifor  is  not
successful in commercializing vadadustat, if approved, in the dialysis organizaons for which they are responsible in a mely manner, or at all, our revenue
related to vadadustat will be adversely impacted.

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Our,  or  our  partners',  failure  to  obtain  or  maintain  adequate  coverage,  pricing  and  reimbursement  for  Auryxia,  vadadustat,  if  approved,  or  any  other
future approved products, could have a material adverse effect on our or our collaboraon partners’ ability to sell such approved products profitably and
otherwise have a material adverse impact on our business.

Market acceptance and sales of any approved products, including Auryxia and, if approved, vadadustat, depends significantly on the availability of adequate
coverage  and  reimbursement  from  third  party  payors  and  may  be  affected  by  exisng  and  future  healthcare  reform  measures.  Governmental  authories,
third party payors, and PBMs decide which drugs they will cover, as well as establish formularies or implement other mechanisms to manage ulizaon of
products  and  determine  reimbursement  levels.  We  cannot  be  sure  that  coverage  or  adequate  reimbursement  will  be  available  for  Auryxia,  vadadustat,  if
approved,  or  any  of  our  potenal  future  products.  Even  if  we  obtain  coverage  for  an  approved  product,  third  party  payors  may  not  establish  adequate
reimbursement amounts, which may reduce the demand for our product and prompt us to have to reduce pricing for the product. If reimbursement is not
available or is limited, we may not be able to successfully commercialize certain of our products. Coverage and reimbursement by a governmental authority,
third-party payor or PBMs may depend upon a number of factors, including the determinaon that use of a product is:

•

•

•

•

a covered benefit under the health plan;

safe, effecve and medically necessary;

appropriate for the specific paent; and

cost effecve.

Obtaining coverage and reimbursement approval for a product from a governmental authority, PBM or a third-party payor is a me consuming and costly
process that could require us to provide supporng scienfic, clinical and cost-effecveness data for the use of our products to the payor. In the U.S., there
are mulple governmental authories, PBMs and third-party payors with varying coverage and reimbursement levels for pharmaceucal products, and the
ming of commencement of reimbursement by a governmental payor can be dependent on the assignment of codes via the Healthcare Common Procedural
Coding System, which codes are assigned on a quarterly basis. Within Medicare, for oral drugs dispensed by pharmacies and also administered in facilies,
coverage  and  reimbursement  may  vary  depending  on  the  seng.  CMS,  local  Medicare  administrave  contractors,  Medicare  Part  D  plans  and/or  PBMs
operang on behalf of Medicare Part D plans, may have some responsibility for determining the medical necessity of such drugs, and therefore coverage, for
different paents. Different reimbursement methodologies may apply, and CMS may have some discreon in interpreng their applicaon in certain sengs.

As an oral drug, Auryxia is covered by Medicare under Part D for the treatment of paents with hyperphosphatemia. In January 2011, CMS implemented the
ESRD PPS, a prospecve payment system for dialysis treatment. Under the ESRD PPS, CMS generally makes a single bundled payment to the dialysis facility for
each dialysis treatment that covers all items and services rounely required for dialysis treatments furnished to Medicare beneficiaries in Medicare-cerfied
ESRD facilies or at their home. The inclusion of oral medicaons without injectable or intravenous equivalents such as Auryxia in the bundled payment was
inially delayed by CMS unl January 1, 2014, and through several subsequent legislave acons has been delayed unl January 1, 2025.

Absent  further  legislaon  or  regulaon  on  this  maer,  beginning  in  January  2025,  oral  ESRD-related  drugs  without  injectable  or  intravenous  equivalents,
including Auryxia and all other phosphate lowering medicaons, will be included in the ESRD bundle and separate Medicare payment for these drugs will no
longer be available, as is the case today under Medicare Part D. ESRD facilies may nonetheless receive a TDAPA for new renal dialysis drugs and biological
products that meet certain criteria for a period of two years. The TDAPA will provide separate payment based on the drug’s Average Sales Price, or ASP, that
will be in addion to the base rate in order to facilitate the adopon of innovave therapies. There can be no assurances that CMS will not again delay the
inclusion  of  these  oral  ESRD-related  drugs  in  the  bundled  payment.  Even  if  Auryxia  is  deemed  eligible  by  CMS,  revenue  for  sales  of  Auryxia  could  be
significantly less in the TDAPA period than it would be if Auryxia is not bundled into the ESRD PPS. Moreover, in the post-TDAPA period, CMS currently expects
to increase the single bundled payment base rate paid to the dialysis facility for each dialysis treatment to reflect that oral only phosphate lowering drugs will
be reimbursed as part of the single bundled payment for Medicare paents. There can be no assurances that any increase in the single bundled payment base
rate will be sufficient to adequately reimburse the dialysis facilies for Auryxia at a price that is profitable for us.

In addion, in September 2018, CMS decided that Auryxia would no longer be covered by Medicare for the treatment of iron deficiency anemia, or IDA, in
adult paents with NDD-CKD, or the CMS Decision. While this decision does not impact CMS coverage for the control of serum phosphorus levels in adult
paents with DD-CKD, or the Hyperphosphatemia Indicaon,  it  requires  Part  D  Plan  sponsors  to  impose  prior  authorizaon  or  other  steps  to  ensure  that
Auryxia is reimbursed only for the Hyperphosphatemia Indicaon. We decided beginning in 2022 to terminate certain Part D contracts, as paents no longer
had the access benefit given the prior authorizaon, or PA, requirement. Now paents must go through a medical exempon process, which is very similar to
a prior authorizaon review. While we believe this had, and may connue to have, a negave

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impact on our overall sales volume, we believe it had a significant posive impact on our net selling price. However, if we experience addional negave
impacts on our sales volume as a result of this change, it could have a negave impact on our product revenue.

Medicaid reimbursement of drugs varies by state. Private third-party payor reimbursement policies also vary and may or may not be consistent with Medicare
reimbursement  methodologies.  Manufacturers  of  outpaent  prescripon  drugs  may  be  required  to  provide  discounts  or  rebates  under  government
healthcare programs or to certain third-party payors in order to obtain coverage of such products.

Addionally, we may be required to enter into contracts with third party payors and/or PBMs offering rebates or discounts on our products in order to obtain
favorable  formulary  status  and  we  may  not  be  able  to  agree  upon  commercially  reasonable  terms  with  such  third  party  payors  or  PBMs,  or  provide  data
sufficient to obtain favorable coverage and reimbursement for many reasons, including that we may be at a compeve disadvantage relave to companies
with more extensive product lines. In addion, third party payors, PBMs and other enes that purchase our products may impose restricons on our ability
to raise prices for our products over me without incurring addional costs. Four distributors, Fresenius Medical Care Rx, McKesson Corporaon, Cardinal
Health, Inc. and Cencora, Inc., formerly known as AmerisourceBergen Drug Corporaon, in the aggregate, accounted for a significant percentage of our gross
revenue during the year ended December 31, 2023. If we are not able to maintain our arrangements with these key distributors on favorable terms, on a
mely basis or at all, or if there is any adverse change in one or more of these distributors’ business pracces or financial condion, it would adversely impact
the market opportunity for Auryxia, our product revenues and operang results.

In addion, vadadustat was approved in Japan for the treatment of adult paents with anemia due to CKD and is being marketed by MTPC in Japan under the
trade  name  Vafseo.  Pricing  and  reimbursement  strategy  is  a  key  component  of  MTPC’s  commercializaon  plans  for  Vafseo  in  Japan.  If  coverage  and
reimbursement terms change, MTPC may not be able to, or may decide not to, connue commercializaon of Vafseo in Japan. Furthermore, vadadustat was
approved in Europe and Australia for the treatment of anemia due to CKD in DD-CKD paents. In Europe, reimbursement is obtained on a country-by-country
basis and it is a me consuming process. Medice is working on securing pricing and reimbursement in key markets in Europe, but there is no guarantee of the
ming or extent of reimbursement that they will receive, if at all.

We currently believe it is likely that vadadustat, if approved, will be reimbursed using the Transional Drug Add-on Payment Adjustment, or TDAPA, followed
by inclusion in the bundled reimbursement model for Medicare beneficiaries, but reimbursement under TDAPA it is subject to review and approval by CMS.
For  those  that  obtain  dialysis  through  commercial  insurance  during  the  30-month  coordinaon  period  or  through  Medicaid  prior  to  Medicare  becoming
primary payor aer 90 days, paents may access vadadustat through contracts we negoate with third party payors for reimbursement of vadadustat, which
would be subject to the risks and uncertaines described above. Addionally, applying for and obtaining reimbursement under the TDAPA is expected to take
six months following filing acceptance, which will affect adopon, uptake and product revenue for vadadustat during that me, and if there are updates to
the TDAPA rule that decrease the basis for reimbursement or eligibility criteria during the transion period or if the TDAPA is eliminated, then our profitability
may  be  adversely  affected.  For  example,  the  Medicare  Payment  Advisory  Commission,  or  MedPAC,  an  independent  legislave  branch  advisory  body  to
Congress  on  issues  related  to  the  Medicare  program,  has  recommended  that  TDAPA  not  be  provided  to  newly  approved  drug  products  considered  to  fall
within “funconal categories” for which costs are already accounted for in the bundled reimbursement model, such as for anemia management drugs.

Further, if vadadustat is approved in the U.S., we expect it to be included in the fixed reimbursement model for a bundle of dialysis services, or the bundle,
which will require us to enter into contracts to supply vadadustat to specific dialysis providers, instead of through distributors, which we believe could be
challenging. The dialysis market is unique and is dominated by two providers: DaVita and Fresenius Medical Care, which account for a vast majority of the
dialysis  populaon  in  the  U.S.  Under  the  Vifor  Agreement,  we  granted  CSL  Vifor  an  exclusive  license  to  sell  vadadustat  to  Fresenius  Medical  Care  North
America  and  its  affiliates,  including  Fresenius  Kidney  Care  Group  LLC,  to  certain  third-party  dialysis  organizaons  approved  by  us,  to  independent  dialysis
organizaons that are members of group purchase organizaons, and to certain non-retail specialty pharmacies in the U.S. We refer to Fresenius Medical Care
North  America  and  its  affiliates,  these  organizaons  and  specialty  pharmacies  collecvely  as  the  “Supply Group."  See  Note  8,  Deferred  Revenue,  Refund
Liability and Liability Related to Sale of Future Royales, to our consolidated financial statements in Part II, Item 8. Financial Statements of this Form 10-K for
addional informaon regarding the Vifor Agreement. If vadadustat is approved, and we are not able to maintain the Vifor Agreement or enter into a supply
agreement with DaVita or other dialysis clinics, or if Vifor is not able to successfully contract with the Supply Group, our business may be materially harmed.

Similar to how payor coverage may affect the sales of a product, formulary status within dialysis organizaons may affect what products are prescribed within
that specific organizaon. Therefore, if a product is not on a formulary, the prescribers within that organizaon may be less likely to prescribe that product or
may have a difficult me prescribing that product, resulng in less sales. Further, one dialysis organizaon’s determinaon to add a product to their formulary
does not assure that other dialysis organizaons will also add the product to theirs. There is always a risk a dialysis organizaon will not

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contract with a drug manufacturer for a specific product, resulng in that product not being on that organizaon’s formulary. If any dialysis organizaon does
not add vadadustat, if approved, to the formulary, our business may be materially harmed.

In addion, we may be unable to sell Auryxia or vadadustat, if approved, to dialysis providers on a profitable basis if CMS significantly reduces the level of
reimbursement for dialysis services and providers choose to use alternave therapies or look to re-negoate their contracts with us. Our profitability may also
be  affected  if  our  costs  of  producon  increase  faster  than  increases  in  reimbursement  levels.  Adequate  coverage  and  reimbursement  of  our  products  by
government and private insurance plans are central to paent and provider acceptance of any products for which we receive markeng approval. Exisng
compeve products may enter into sole source agreements with dialysis providers that impact the ability for new product innovaons and new competors
may face price pressure based on exisng contracts with dialysis providers.

Further, in many countries outside the U.S., a drug must be approved for reimbursement before it can be marketed or sold in that country. In some cases, the
prices that we intend to charge for our products are also subject to approval. Approval by the EMA or another regulatory authority does not ensure approval
by  reimbursement  authories  in  that  jurisdicon,  and  approval  by  one  reimbursement  authority  outside  the  U.S.  does  not  ensure  approval  by  any  other
reimbursement authories. However, the failure to obtain reimbursement in one jurisdicon may negavely impact our ability to obtain reimbursement in
another jurisdicon. In addion, we plan to rely on a partner to obtain approval by reimbursement authories outside the U.S. Our partners may not be able
to obtain such reimbursement approvals on a mely basis, if at all, and favorable pricing in certain countries depends on a number of factors, some of which
are outside of our partners' control. In May 2023, we entered into the license agreement with Medice, pursuant to which we granted Medice an exclusive
license to develop and commercialize vadadustat for the treatment of anemia in paents with chronic kidney disease in the Medice Territory. If Medice is not
able to obtain favorable pricing in the Medice Territory, or if such approvals are delayed, it will affect Medice’s sales of vadadustat in the Medice Territory,
which could have an adverse effect on our results of operaons.

We face substanal compeon, which may result in others discovering, developing or commercializing products before, or more successfully than, we do.

The development and commercializaon of new drugs is highly compeve and subject to rapid and significant technological change. Our future success
depends on our ability to demonstrate and maintain a compeve advantage with respect to the development and commercializaon of Auryxia, vadadustat,
if approved, and any other product or product candidate, including those that may be in-licensed or acquired. Our objecve is to connue to commercialize
Auryxia and develop and commercialize new products with clinically proven efficacy, convenience, tolerability and/or safety. In many cases, any approved
products that we commercialize will compete with exisng, market-leading products. If exisng or new competors of Auryxia take market share from us, it
could have an adverse impact on Auryxia revenue and our business.

Auryxia is compeng in the hyperphosphatemia market in the U.S. with other FDA-approved phosphate binders such as Renagel® (sevelamer hydrochloride)
and Renvela® (sevelamer carbonate), both marketed by Sanofi, PhosLo® and Phoslyra® (calcium acetate), marketed by Fresenius Medical Care North America,
Fosrenol® (lanthanum carbonate), marketed by Shire Pharmaceucals Group plc, and Velphoro® (sucroferric oxyhydroxide), marketed by Fresenius Medical
Care North America, as well as over-the-counter calcium carbonate products such as TUMS® and metal-based opons such as aluminum, lanthanum and
magnesium.  Most  of  the  phosphate  binders  listed  above  are  now  also  available  in  generic  forms.  In  addion,  other  agents  are  in  development,  including
OPKO Health Inc.’s Alpharen™ Tablets (fermagate tablets) and Unicycive’s RENAZORB™ (lanthanum dioxycarbonate), or could otherwise enter the market that
may  impact  the  market  for  Auryxia.  In  October  2023,  the  FDA  approved  XPHOZAH®  (tenapanor),  a  phosphate  absorpon  inhibitor  that  is  marketed  by
Ardelyx, Inc. and indicated to reduce serum phosphorus in adults with CKD on dialysis as add-on therapy in paents who have an inadequate response to
phosphate binders or who are intolerant of any dose of phosphate binder therapy, which may impact the market for Auryxia.

Auryxia is compeng in the IDA market in the U.S. with over-the-counter oral iron, ferrous sulfate, other prescripon oral iron formulaons, including ferrous
gluconate,  ferrous  fumerate,  and  polysaccharide  iron  complex,  and  intravenous  iron  formulaons,  including  Feraheme®  (ferumoxytol  injecon),  Venofer®
(iron  sucrose  injecon),  Ferrlicit®  (sodium  ferric  gluconate  complex  in  sucrose  injecon),  Injectafer®  (ferric  carboxymaltose  injecon),  and  Triferic®  (ferric
pyrophosphate  citrate).  In  addion,  other  new  therapies  for  the  treatment  of  IDA  may  impact  the  market  for  Auryxia,  such  as  Shield  Therapeucs  plc's
Feraccru® (ferric maltol), which is available in Europe for the treatment of IDA and Accrufer® (ferric maltol), which was launched in the U.S. for the treatment
of IDA in July 2021.

Furthermore,  Auryxia’s  commercial  opportunies  may  be  reduced  or  eliminated  if  our  competors  develop  and  market  products  that  are  less  expensive,
more effecve, safer or offer greater paent convenience than Auryxia. Other companies have product candidates in various stages of preclinical or clinical
development to treat diseases and complicaons of the diseases for which we are markeng Auryxia. In addion, we and our licensors, Panion & BF Biotech,
Inc., or Panion, and, as applicable, Dr. Hsu, entered into selement agreements with all but one of the third pares who submied Paragraph IV cerficaon
noce leers regarding Abbreviated New Drug Applicaons, or ANDAs, submied to the FDA, pursuant to which we granted licenses to market a generic
version of Auryxia in the U.S. beginning in March 2025 (subject to FDA approval), or earlier under certain circumstances customary for selement agreements
of this nature. While we expect that the availability

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of generic versions of Auryxia will negavely impact our net product revenue for Auryxia and our results of operaons, it is difficult to esmate the impact of
generics on Auryxia net product revenue, and if the impact is greater than we currently ancipate, it may materially adversely impact our business and results
of operaons.

Drugs  that  may  compete  with  vadadustat,  if  approved,  include  Epogen®  (epoen  alfa)  and  Aranesp®  (darbepoen  alfa),  both  commercialized  by  Amgen,
Procrit® (epoen alfa) and Eprex® (epoen alfa), commercialized by Johnson & Johnson in the U.S. and Europe, respecvely, and Mircera® (methoxy PEG-
epoen beta), commercialized by CSL Vifor in the U.S. and Roche Holding Ltd. outside of the U.S. and Evrenzo® (roxadustat) in Europe commercialized by
Astellas  Pharma  Inc.  Further,  in  February  2023  the  FDA  approved  daprodustat,  an  oral  hypoxia-inducible  factor  prolyl  hydroxylase,  or  HIF-PH,  inhibitor
marketed as Jesduvroq by GlaxoSmithKline plc, or GSK, in the U.S., as a once-a-day treatment of anemia due to CKD in adult paents who have been receiving
dialysis for at least four months.

We and our partners may also face compeon from potenal new anemia therapies. There are several other HIF-PH inhibitor product candidates in various
stages of development for anemia indicaons that may be in direct compeon with vadadustat if and when they are approved and launched commercially.
These candidates are being developed by companies such as Japan Tobacco Internaonal, or JT, and Bayer HealthCare AG, or Bayer. For example, FibroGen
filed an NDA for its product candidate, roxadustat, with the FDA, to which the FDA issued a complete response leer indicang the FDA will not approve the
NDA in its present form and requested that an addional clinical trial for roxadustat be conducted prior to resubmission of the NDA or addional response to
the FDA's complete response leer. In Europe however, roxadustat is approved for the treatment of anemia in paents with CKD. If we obtain approval for
vadadustat in the U.S., and roxadustat is also approved by the FDA, then roxadustat will compete with vadadustat.

Furthermore,  certain  companies  are  developing  potenal  new  therapies  for  renal-related  diseases  that  could  potenally  reduce  injectable  erythropoiesis
smulang agent, or ESA, ulizaon and thus limit the market potenal for vadadustat if they are approved and launched commercially. Other new therapies
are in development for the treatment of condions inclusive of renal anemia that may impact the market for anemia-targeted treatment.

In  Japan,  vadadustat  is  sold  under  the  name  Vafseo,  which  is  approved  for  paents  with  CKD,  including  both  DD-CKD  and  NDD-CKD,  and  competes  with
roxadustat, daprodustat and enarodustat. Roxadustat is approved for the treatment of anemia due to CKD in paents on dialysis, or DD-CKD, and paents not
on dialysis, or NDD-CKD. In addion, daprodustat, GSK’s product candidate, and enarodustat, JT’s product candidate, are approved in Japan for the treatment
of  anemia  due  to  CKD,  and  molidustat,  Bayer  HealthCare  AG's  product,  is  approved  in  Japan  for  the  treatment  of  renal  anemia.  In  China,  roxadustat  is
commercialized for the treatment of anemia due to CKD in DD-CKD paents and for the treatment of anemia due to CKD in NDD-CKD paents.

A biosimilar is a biologic product that is approved based on demonstrang that it is highly similar to an exisng, FDA-approved branded biologic product. The
patents for the exisng, branded biologic product must expire in a given market before biosimilars may enter that market without the risk of being sued for
patent infringement. In addion, an applicaon for a biosimilar product can only be approved by the FDA 12 years aer the exisng, branded product was
approved under a Biologics License Applicaon, or BLA. The patents for epoen alfa, an injectable ESA, expired in 2004 in the EU, and the remaining patents
expired between 2012 and 2016 in the U.S. The introducon of biosimilars into the injectable ESA market in the U.S. will constute addional compeon for
vadadustat  if  we  are  able  to  obtain  approval  for  and  commercially  launch  vadadustat.  In  the  U.S.,  Pfizer’s  biosimilar  version  of  injectable  ESAs,  Retacrit®
(epoen alfa-epbx), was approved by the FDA in May 2018 and launched in November 2018 and several biosimilar versions of injectable ESAs are available for
sale in the EU.

Many of our potenal competors have significantly greater financial, manufacturing, markeng, drug development, technical and human resources than we
do.  Large  pharmaceucal  companies,  in  parcular,  have  extensive  experience  in  clinical  tesng,  obtaining  markeng  approvals,  recruing  paents  and
manufacturing pharmaceucal products. Large and established companies such as Amgen, Roche and GSK, among others, compete in the market for drug
products  to  treat  kidney  disease.  In  parcular,  these  companies  have  greater  experience  and  experse  in  conducng  preclinical  tesng  and  clinical  trials,
obtaining  markeng  approvals,  manufacturing  such  products  on  a  broad  scale  and  markeng  approved  products.  These  companies  also  have  significantly
greater research and markeng capabilies than we do and may also have products that have been approved or are in late stages of development and have
collaborave arrangements in our target markets with leading companies and research instuons. Established pharmaceucal companies may also invest
heavily to accelerate discovery and development of novel compounds or to in-license novel compounds that could make the product candidates that we are
developing obsolete. Smaller and other early-stage companies may also prove to be significant competors. As a result of all of these factors, our competors
may  succeed  in  obtaining  patent  protecon  and/or  markeng  approval,  or  discovering,  developing  and  commercializing  compeve  products,  before,  or
more effecvely than, we do. If we are not able to compete effecvely against potenal competors, our business will not grow and our financial condion
and operaons will suffer.

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The commercializaon of Riona and Vafseo in Japan, Vafseo in Europe and other territories where it is approved, and our current and potenal future
efforts with respect to the development and commercializaon of our products and product candidates outside of the U.S. subject us to a variety of risks
associated with internaonal operaons, which could materially adversely affect our business.

Our Japanese sublicensee, JT, and its subsidiary, Torii Pharmaceucal Co., Ltd., or Torii, commercialize Riona, the trade name for ferric citrate hydrate in Japan,
as  an  oral  treatment  for  the  improvement  of  hyperphosphatemia  in  paents  with  CKD,  including  DD-CKD  and  NDD-CKD,  and  for  the  treatment  of  adult
paents  with  IDA  in  Japan.  In  Japan  and  certain  other  countries  in  Asia,  we  granted  MTPC  exclusive  rights  to  commercialize  vadadustat,  which  has  been
approved and is being marketed by MTPC in Japan under the trade name Vafseo. We also granted Averoa SAS, or Averoa, an exclusive license to develop and
commercialize ferric citrate in the EEA, Turkey, Switzerland and the UK.

In 2023, the markeng authorizaon for vadadustat was granted by the EMA, the United Kingdom Medicines and Healthcare Products Regulatory Agency, or
the MHRA, the Swiss Agency for Therapeuc Products, or Swissmedic, and the Australian Therapeuc Goods Administraon, or TGA. In May 2023, we entered
into  the  license  agreement  with  Medice,  pursuant  to  which  we  granted  Medice  an  exclusive  license  to  develop  and  commercialize  vadadustat  for  the
treatment of anemia in paents with chronic kidney disease in the Medice Territory, and we transferred the markeng authorizaon issued by the EMA and
Swissmedic to Medice. We will transfer the other markeng authorizaons for the Medice Territory to Medice, if approved. In addion, we have conducted
and in the future plan to conduct clinical trials outside of the U.S. for Auryxia, vadadustat and any other product or product candidate that may be in-licensed
or  acquired.  As  a  result  of  these  and  other  acvies,  we  are  or  may  become  subject  to  addional  risks  in  developing  and  commercializing  Auryxia  and
vadadustat outside the U.S., including, among others:

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polical, regulatory, compliance and economic developments, weakness or instability that could restrict our ability to manufacture, market and sell
our products;

changes in internaonal medical reimbursement policies and programs;

changes in healthcare policies of foreign jurisdicons;

trade protecon measures, including import or export licensing requirements and tariffs and our compliance therewith;

our ability to develop or manage relaonships with qualified local distributors and trading companies;

diminished protecon of intellectual property in some countries outside of the U.S.;

differing labor regulaons and business pracces;

compliance with laws, including the U.S. Foreign Corrupt Pracces Act, or FCPA, the UK Bribery Act or similar local regulaon, the EU General Data
Protecon Regulaon, or GDPR, and similar data protecon laws, and tax, employment, immigraon and labor laws;

economic weakness, including inflaon, increasing interest rates, or polical instability in parcular foreign economies and markets;

foreign  currency  fluctuaons,  which  could  result  in  increased  operang  expenses  and  reduced  revenues,  and  other  obligaons  incident  to  doing
business in another country;

producon shortages resulng from any events affecng raw material supply or manufacturing capabilies abroad; and

business interrupons resulng from geopolical acons, including war and terrorism, global pandemics, or natural disasters including earthquakes,
typhoons, floods and fires.

In addion, we receive revenues from royalty payments converted to U.S. dollars based on net sales of Riona and Vafseo in Japanese yen. The exchange rates
between the Japanese yen on the one hand, and the U.S. dollar, on the other hand, have changed substanally in recent years and may fluctuate substanally
in  the  future.  Our  results  of  operaons  could  be  adversely  affected  over  me  by  certain  movements  in  exchange  rates,  parcularly  if  the  Japanese  yen
depreciates against the U.S. dollar.

Any of these factors may, individually or as a group, have a material adverse effect on our business and results of operaons. As and if we connue to expand
our commercializaon efforts, we may encounter new risks.

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Risks Related to Product Development

Clinical drug development involves a lengthy and expensive process with an uncertain outcome, and we will incur addional costs in connecon with, and
may experience delays in compleng, or ulmately be unable to complete, the development of vadadustat and any other product candidates.

The risk of failure in drug development is high. Before obtaining markeng approval from regulatory authories for the sale of any product candidate, we
must complete preclinical development and conduct extensive clinical trials to demonstrate the safety and efficacy of our product candidates in humans.
Preclinical studies and clinical trials are expensive, difficult to design and implement, can take several years to complete, and their outcomes are inherently
uncertain. Failure can occur at any me during the process.

We may be unable to successfully complete clinical trials of Auryxia, vadadustat and other product candidates or to successfully obtain approval of vadadustat
or other product candidates, if the results of those trials and studies are not posive or are only modestly posive, or if there are concerns with the profile
due to efficacy or safety. Further, the results of preclinical studies and early clinical trials of our product candidates may not be predicve of the results of
later-stage clinical trials, interim results of a clinical trial do not necessarily predict final results, and results of Phase 3 clinical trials for one indicaon may not
be predicve of results of Phase 3 clinical trials for another indicaon. For example, we announced posive top-line results from INNO VATE and vadadustat
achieved the primary and key secondary efficacy endpoint in each of the two PRO TECT studies, but the PRO TECT program did not meet the primary major
adverse cardiovascular event, or MACE, safety endpoint. Many companies in the biopharmaceucal industry have suffered significant setbacks in late-stage
clinical trials aer achieving posive results in early-stage development, and we may face similar setbacks. Moreover, preclinical and clinical data are oen
suscepble to varying interpretaons and analyses, and many companies that have believed their product candidates performed sasfactorily in preclinical
studies and clinical trials have nonetheless failed to obtain markeng approval of their product candidates. In addion, in March 2022, we received the CRL
for  vadadustat  indicang  that  the  FDA  had  determined  that  it  could  not  approve  the  NDA  in  its  present  form,  thus  delaying  any  potenal  approval  of
vadadustat. In October 2022, we submied the FDRR to the FDA. In May 2023, the OND denied our appeal but provided a path forward for us to resubmit the
NDA for vadadustat for the treatment of anemia due to CKD for dialysis dependent paents without the need for us to generate addional clinical data. In
September 2023, we filed our resubmission to our NDA, and in October 2023, the FDA acknowledged that the resubmission was complete and set a PDUFA
date of  March  27,  2024.  However,  it  is  impossible  to  predict  when  or  if  vadadustat  or  any  of  our  other  product  candidates  will  prove  effecve  or  safe  in
humans or will receive markeng approval or on what terms. If we are unsuccessful in obtaining approval for vadadustat in the U.S., it would have an adverse
effect on our results of operaons.

2

2

2

Beyond  seeking  U.S.  approval,  we  have  several  lifecycle  management  and  indicaon  expansion  opportunies  currently  under  evaluaon  for  vadadustat,
including the potenal for alternave dosing and label expansion for the treatment of anemia due to CKD in adult paents not on dialysis. However, we may
be  required  to  complete  addional  clinical  trials  before  seeking  approval  for  these  indicaons,  which  are  me  consuming  and  expensive,  and  even  if
vadadustat  is  approved  as  a  treatment  for  anemia  due  to  CKD  for  dialysis  dependent  paents,  we  may  not  be  successfully  in  any  of  these  areas  in  the
meframe ancipated by us, or at all.

We may experience numerous unforeseen events during, or as a result of, preclinical development or clinical trials that could delay, prevent or make more
challenging  our  ability  to  receive  or  maintain  markeng  approval  or  commercialize  our  product  candidates.  We  may  be  required  to  complete  addional
clinical trials for Auryxia, vadadustat and any other product or product candidate, including those that may be in-licensed or acquired, in order to obtain or
maintain required regulatory approvals. Our preclinical studies and clinical trials may take longer to complete than currently ancipated, or may be delayed,
suspended,  required  to  be  repeated,  prematurely  terminated  or  may  not  successfully  demonstrate  safety  and/or  efficacy  needed  to  obtain  or  maintain
regulatory approval for a variety of other reasons, such as:

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the costs may be greater than we ancipate;

the number of paents required for clinical trials may be larger than we ancipate;

enrollment  in  our  clinical  trials  may  be  slower  than  we  ancipate,  or  parcipants  may  drop  out  of  these  clinical  trials  at  a  higher  rate  than  we
ancipate;

our  third  party  contractors,  such  as  our  CROs,  may  fail  to  comply  with  regulatory  requirements,  perform  effecvely,  or  meet  their  contractual
obligaons to us in a mely manner, or at all, or we may fail to communicate effecvely or provide the appropriate level of oversight of such third
party contractors;

the supply or quality of our starng materials, drug substance and drug product necessary to conduct clinical trials of our product candidates may be
insufficient or inadequate;

regulators, independent data monitoring commiees, or IDMCs, instuonal review boards, or IRBs, safety commiees, or ethics commiees, may
require  that  we  suspend  or  terminate  our  clinical  trials  for  various  reasons,  including  noncompliance  with  regulatory  requirements,  unforeseen
safety issues or adverse side effects, failure to

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demonstrate a benefit from using our product candidate, or a finding that the parcipants are being exposed to unacceptable health risks;

•

•

clinical trials of our product candidates may produce negave or inconclusive results or results that may be interpreted in a manner different than
we interpret them, and we may decide, or regulators may require us, to conduct addional clinical trials, repeat a clinical trial or abandon product
development programs;

lack of adequate funding to connue a clinical trial, including unforeseen costs due to enrollment delays, requirements to conduct addional clinical
trials or repeat a clinical trial and increased expenses associated with the services of our CROs and other third pares;

• we may fail to iniate, delay of or failure to complete a clinical trial as a result of an Invesgaonal New Drug applicaon, or IND, being placed on
clinical  hold  by  the  FDA,  the  EMA,  the  PMDA,  or  other  regulatory  authories,  or  for  other  reasons,  such  as  failure  to  recruit  or  enroll  suitable
paents or paents' failure to return for post-treatment follow up;

• we may determine to change or expand a clinical trial, including aer it has begun;

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clinical trial sites and invesgators deviang from the clinical protocol, failing to conduct the trial in accordance with regulatory requirements, or
dropping out of a trial, or failure by us or our CROs to communicate effecvely or provide the appropriate level of oversight of such clinical sites and
invesgators;

there may be an inability, delay, or failure in idenfying and maintaining a sufficient number of clinical trial sites, many of which may already be
engaged in other clinical programs;

there may be a delay or failure in reaching agreement with the FDA, the EMA, the PMDA or other regulatory authories on a clinical trial design
upon which we are able to execute;

there may be a delay or failure in obtaining authorizaon to commence a clinical trial or inability to comply with condions imposed by a regulatory
authority regarding the scope or design of a clinical trial;

there may be delays in reaching, or failure to reach, agreement on acceptable terms with prospecve clinical trial sites and prospecve CROs, the
terms of which can be subject to extensive negoaon and may vary significantly among different CROs and clinical trial sites;

the  FDA,  the  EMA,  the  PMDA  or  other  regulatory  authories  may  require  us  to  submit  addional  data  or  impose  further  requirements  before
perming us to iniate a clinical trial or during an ongoing clinical trial;

the FDA, the EMA, the PMDA or other regulatory authories may disagree with our clinical trial design and our interpretaon of data from clinical
trials, or may change the requirements for approval even aer it has reviewed and commented on the design for our clinical trials;

third  pares  with  which  we  work  may  fail  to  comply  with  good  pracce  quality  guidelines  and  regulaons,  or  GxP,  including  good  laboratory
pracce, good clinical pracce, or GCP, and current good manufacturing pracce, or cGMP; or

there may be changes in governmental regulaons or administrave acons.

If any of the foregoing occurs, the following may occur:

•

regulators  may  require  that  we  conduct  addional  clinical  trials,  repeat  clinical  trials  or  conduct  other  studies  beyond  those  that  we  currently
contemplate;

• we may be delayed in obtaining markeng approval for vadadustat or other product candidates;

• we may not obtain markeng approval for vadadustat or other product candidates at all;

• we may obtain approval for indicaons or paent populaons that are not as broad as intended or desired;

• we may obtain approval with labeling that includes significant use or distribuon restricons or safety warnings that would reduce the potenal

market for any approved product or inhibit our ability to successfully commercialize any approved product;

•

a  REMS  or  FDA-imposed  risk  management  plan  that  use  risk  minimizaon  strategies  to  ensure  that  the  benefits  of  certain  prescripon  drugs
outweigh their risks, may be required;

• we may be subject to addional post-markeng restricons and/or requirements; or

•

the product may be removed from the market aer obtaining markeng approval.

Our  product  development  costs  may  also  increase  if  we  experience  development  delays  or  delays  in  receiving  the  requisite  markeng  approvals.  Our
preclinical studies or clinical trials may need to be restructured or may not be completed on schedule, or at all. Significant preclinical or clinical trial delays
also  could  shorten  any  periods  during  which  we  may  have  the  exclusive  right  to  commercialize  vadadustat,  if  approved,  or  any  other  product  candidate,
including those that may be in-

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licensed  or  acquired,  or  allow  our  competors  to  bring  products  to  market  before  we  do.  This  could  impair  our  ability  to  successfully  commercialize  our
product candidates and may harm our business and results of operaons.

We may find it difficult to enroll paents in our clinical trials, which could delay or prevent clinical trials of Auryxia, vadadustat or any other product or
product candidate, including those that may be in-licensed or acquired.

Idenfying and qualifying paents to parcipate in clinical trials is crical to our success. The ming of our clinical trials depends, in part, on the speed at
which  we  can  recruit  paents  to  parcipate  in  our  clinical  trials.  Paents  may  be  unwilling  to  parcipate  in  our  clinical  trials  because  of  concerns  about
invesgaonal research studies, the me and commitment needed to parcipate in a study, adverse events observed with the product candidate under study,
the  current  standard  of  care,  competor  products  and/or  other  invesgaonal  agents,  in  each  case  for  the  same  indicaons  and/or  similar  paent
populaons. In addion, in the case of clinical trials of any product candidate, paents currently receiving treatment with the current standard of care or a
competor product may be reluctant to parcipate in a clinical trial with an invesgaonal drug. Addionally, it is oen more difficult to enroll special or
parcular subpopulaons of paents, such as pediatric or elderly paents, due to a number of factors including parental or other caregiver consideraons,
concerns  and  burdens.  For  example,  we  enrolled  sites  in  a  post-approval  pediatric  study  for  the  Hypophosphatemia  Indicaon  of  Auryxia  in  the  second
quarter of 2022, which began paent recruitment in the third quarter of 2022, but enrollment of eligible pediatric paents in study sites connues to be very
slow despite efforts to do so.

Finally, compeon for clinical trial sites may limit our access to paents appropriate for our clinical trials. As a result, the meline for recruing paents and
conducng studies may be delayed. These delays could result in increased costs, delays in advancing our development of any product or product candidate,
or terminaon of the clinical trial altogether.

We may not be able to idenfy, recruit and enroll a sufficient number of paents, or those with required or desired characteriscs, to complete our clinical
trials in a mely manner. Paent enrollment is affected by many factors, including:

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severity of the disease under invesgaon;

design of the study protocol;

size and nature of the paent populaon;

eligibility criteria for, and design of, the study in queson, including study complexity;

perceived  risks  and  benefits  of  the  product  or  product  candidate  under  study,  including  as  a  result  of  adverse  effects  observed  in  similar  or
compeng therapies;

proximity and availability of clinical trial sites for prospecve paents;

availability  of  compeng  therapies  and  clinical  trials  and  clinicians’  and  paents’  percepons  as  to  the  potenal  advantages  of  the  product  or
product candidate being studied in relaon to available therapies or other product candidates in development;

efforts to facilitate mely enrollment in clinical trials;

parcipaon length and demands on paents and caregivers;

site staffing shortages and turnover;

clinical trial sites and invesgators failing to perform effecvely; and

paent referral pracces of physicians.

We may not be able to iniate or complete clinical trials in a mely manner, or at all, if we cannot enroll a sufficient number of eligible paents to parcipate
in the clinical trials required by regulatory agencies. If we have difficulty enrolling a sufficient number of paents to conduct our clinical trials as planned, we
may need to delay, limit or terminate ongoing or planned clinical trials, any of which may delay approval, or result in failure to maintain or obtain approval, of
our products or product candidates, which would have a material adverse effect on our business.

Further, if we are slow or unable to adapt to changes in exisng requirements or the adopon of new requirements or policies governing clinical trials, our
development plans may be impacted. For example, in December 2022, with the passage of Food and Drug Omnibus Reform Act, Congress required sponsors
to develop and submit a diversity acon plan for each phase 3 clinical trial or any other “pivotal study” of a new drug or biological product. These plans are
meant to encourage the enrollment of more diverse paent populaons in late-stage clinical trials of FDA-regulated products.

Conducng  clinical  trials  outside  of  the  U.S.,  as  we  have  done  historically  and  as  we  may  decide  to  do  in  the  future,  presents  addional  risks  and
complexies and, if we decide to conduct a clinical trial outside of the U.S. in the future, we may not complete such trials successfully, in a mely manner,
or at all, which could affect our ability to obtain regulatory approvals.

Our  ability  to  successfully  iniate,  enroll  and  complete  a  clinical  trial  in  any  country  outside  of  the  U.S.  is  subject  to  numerous  addional  risks  unique  to
conducng business in jurisdicons outside the U.S., including:

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difficulty in establishing or managing relaonships with qualified CROs, physicians and clinical trial sites;

difficulty in complying with different local standards for the conduct of clinical trials;

difficulty in complying with various and complex import laws and regulaons when shipping drug to certain countries; and

the potenal burden of complying with a variety of laws, medical standards and regulatory requirements, including the regulaon of pharmaceucal
and biotechnology products and treatments.

Data obtained from studies conducted in the U.S. may not be accepted by the EMA, the PMDA and other regulatory authories outside of the U.S. Also,
certain jurisdicons require data from studies conducted in their country in order to obtain approval in that country. Further, when a foreign clinical trial is not
conducted  under  an  IND,  the  sponsor  must  ensure  that  the  study  complies  with  certain  regulatory  requirements  of  the  FDA  in  order  to  use  the  study  as
support for an IND or applicaon for markeng approval. Specifically, the studies must be conducted in accordance with GCP, including undergoing review
and receiving approval by an independent ethics commiee, and seeking and receiving informed consent from subjects. Thus, to the extent that we rely on
data from foreign clinical trials that are not the subject of an IND but are used to support of an NDA, there is a risk that FDA may not review such data in
connecon with its review of the NDA.

If we or our collaboraon partners have difficulty conducng future clinical trials in jurisdicons outside the U.S. as planned, we may need to delay, limit or
terminate such clinical trials, any of which could have an adverse effect on our business.

Auryxia, vadadustat or any other product or product candidate, including those that may be in-licensed or acquired, may cause undesirable side effects or
have other properes that may delay or prevent markeng approval or limit their commercial potenal.

Undesirable effects caused by, or other undesirable properes of, Auryxia, vadadustat or any other product or product candidate, including those that may be
in-licensed or acquired, or compeng commercial products or product candidates in development that ulize a common mechanism of acon could cause us
or  regulatory  authories  to  interrupt,  delay  or  halt  clinical  trials,  could  result  in  a  more  restricve  label  or  the  delay,  denial  or  withdrawal  of  markeng
approval by the FDA or other regulatory authories, and could lead to potenal product liability claims. In addion, results of our clinical trials could reveal a
high  frequency  of  undesirable  effects  or  unexpected  characteriscs.  For  example,  in  March  2022,  we  received  the  CRL  from  the  FDA  for  our  NDA  for
vadadustat  in  which  the  FDA  concluded  that  the  data  in  the  NDA  did  not  support  a  favorable  benefit-risk  assessment  of  vadadustat  for  dialysis  and  non-
dialysis paents. The FDA expressed safety concerns nong failure to meet non-inferiority in MACE in the non-dialysis paent populaon, the increased risk of
thromboembolic events, driven by vascular access thrombosis in dialysis paents, and the risk of drug-induced liver injury. In October 2022, we submied the
FDRR to the FDA and focused on the favorable balance between the benefits and risks of vadadustat for the treatment of anemia due to CKD in adult paents
on dialysis in light of safety concerns expressed by the FDA in the CRL for dialysis paents related to the rate of adjudicated thromboembolic events driven by
vascular access thrombosis for vadadustat compared to the acve comparator and the risk of drug-induced liver injury. In May 2023, the OND denied our
appeal  but  provided  a  path  forward  for  us  to  resubmit  the  NDA  for  vadadustat  for  the  treatment  of  anemia  due  to  CKD  for  dialysis  dependent  paents
without  the  need  for  us  to  generate  addional  clinical  data.  In  September  2023,  we  filed  our  resubmission  to  our  NDA,  and  in  October  2023,  the  FDA
acknowledged that the resubmission was complete and set a PDUFA date of March 27, 2024. There can be no assurances that we will be successful in our
NDA resubmission. If we are unable to overcome these concerns, vadadustat may not be approved by the FDA on favorable terms, or at all, and our financial
condion could be materially harmed.

If we or others idenfy undesirable effects caused by, or other undesirable properes of, Auryxia, vadadustat, or any other product or product candidate,
including those that may be in-licensed or acquired, or if known undesirable effects are more frequent or severe than in the past, or if any of the foregoing
are perceived to have occurred, either before or aer receipt of markeng approval, a number of potenally significant negave consequences could result,
including:

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our product candidates may not be approved by regulatory authories;

our clinical trials may be put on hold;

paent recruitment could be slowed, and enrolled paents may not want to complete the clinical trial;

regulatory authories may require warnings on the label, such as the warning on Auryxia’s label regarding iron overload;

REMS or FDA-imposed risk management plans that use restricve risk minimizaon strategies may be required;

• we may decide to, or be required to, send drug warnings or safety alerts to physicians, pharmacists and hospitals (or the FDA or other regulatory
authories may choose to issue such alerts), or we may decide to conduct a product recall or be requested to do so by the FDA or other regulatory
authority;

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•

reformulaon of the product, addional non-clinical or clinical trials, restricve changes in labeling or changes to or re-approvals of manufacturing
facilies may be required;

• we  may  be  precluded  from  pursuing  addional  development  opportunies  to  enhance  the  clinical  profile  of  a  product  within  its  indicated

populaons, or studying the product or product candidate in addional indicaons and populaons or in new formulaons; and

• we could be invesgated by the government or sued and held liable for harm caused to paents, including in class acon lawsuits; and

•

our reputaon may suffer.

Any  of  these  events  could  prevent  us  from  achieving  or  maintaining,  whether  on  a  restricted  basis  or  at  all,  markeng  approval  and,  ulmately,  market
acceptance or penetraon of Auryxia, vadadustat or any other product or product candidate, including those that may be in-licensed or acquired. In addion,
any of these events could substanally increase our costs, and could significantly impact our ability to successfully commercialize Auryxia, vadadustat or any
other product and product candidate, including those that may be in-licensed or acquired, and generate product revenue.

The paent populaons treated with Auryxia and potenal paent populaons for vadadustat, if approved, have CKD, a serious disease that increases the risk
of  cardiovascular  disease  including  heart  aacks  and  stroke  and,  in  its  most  severe  form,  results  in,  kidney  failure  and  the  need  for  dialysis  or  kidney
transplant.  Many  paents  with  CKD  are  elderly  with  comorbidies  making  them  suscepble  to  significant  health  risks.  Therefore,  the  likelihood  of  these
paents having adverse events, including serious adverse events is high.

2

With respect to the global INNO VATE Phase 3 program, the incidence of treatment emergent adverse events, or TEAEs, during the Correcon and Conversion
study  in  vadadustat  treated  paents  was  83.8%  and  85.5%  in  darbepoen  alfa  treated  paents.  During  the  study,  the  most  common  TEAEs  reported  in
vadadustat/darbepoen alfa treated paents were hypertension (16.2%/ 12.9%) and diarrhea (10.1%/ 9.7%). Serious TEAEs were lower in vadadustat treated
paents at 49.7% compared to 56.5% for darbepoen alfa treated paents. The incidence of TEAEs during the prevalent dialysis paent study (Conversion) in
the  vadadustat  treated  paents  was  88.3%,  and  89.3%  in  darbepoen  alfa  treated  paents.  During  the  study,  the  most  common  TEAEs  reported  in
vadadustat/darbepoen  alfa  treated  paents  were  diarrhea  (13.0%/  10.1%),  pneumonia  (11.0%/  9.7%),  hypertension  (10.6%/  13.8%),  and  hyperkalemia
(9.0%/ 10.8%). Serious TEAEs were slightly lower for vadadustat treated paents at 55.0% and 58.3% for darbepoen alfa-treated paents. Paents with DD-
CKD experienced an increased risk of thromboembolic events compared to darbepoen alfa with a me to first event HR of 1.20 (95% CI 0.96 - 1.50) driven by
thrombosis of vascular access.

2

With respect to the global PRO TECT Phase 3 program, the incidence of TEAEs during the erythropoiesis smulang agent, or ESA, untreated paents study
(Correcon)  in  the  vadadustat-treated  paents  was  90.9%,  and  91.6%  in  darbepoen  alfa-treated  paents.  During  the  study,  the  most  common  TEAEs
reported in vadadustat/darbepoen alfa-treated paents were end-stage renal disease (34.7%/ 35.2%), hypertension (17.7%/ 22.1.%), hyperkalemia (12.3.%/
15.6%), urinary tract infecon (12.9%/ 12.0%), diarrhea (13.9%/ 10.0%), peripheral oedema (12.5%/ 10.5%), fall (9.6%/ 10%) and nausea (10%/ 8.2%). Serious
TEAEs were 65.3% for vadadustat-treated paents and 64.5% for darbepoen alfa-treated paents. The incidence of TEAEs during the ESA-treated paents
study  (Conversion)  in  vadadustat  treated  paents  was  89.1%  and  87.7%  in  darbepoen  alfa-treated  paents.  During  the  study,  the  most  common  TEAEs
reported in vadadustat/darbepoen alfa-treated paents were end-stage renal disease (27.5%/ 28.4%), hypertension (14.4%/ 14.8%), urinary tract infecon
(12.2%/ 14.5%), diarrhea (13.8.%/ 8.8.%), peripheral oedema (9.9%/ 10.1%) and pneumonia (10.0%/ 9.7%). Serious TEAEs were 58.5% for vadadustat-treated
paents and 56.6% for darbepoen alfa-treated paents.

For example, during the conduct of our Phase 3 program our team and hepac experts analyzed hepac cases (unblinded to treatment) and, following the
compleon of our global Phase 3 clinical program for vadadustat, there was a review of hepac safety across the vadadustat clinical program, which included
eight completed Phase 2 and 3 studies in NDD-CKD paents, 10 completed Phase 1, 2, and 3 studies, and two then-ongoing Phase 3b studies in DD-CKD
paents, and 18 completed studies in healthy subjects (17 Phase 1 and one Phase 3). This review consisted of a blinded re-assessment of hepac events
conducted by a separate panel of hepac experts. While hepatocellular injury aributed to vadadustat was reported in less than 1% of paents, there was
one  case  of  severe  hepatocellular  injury  with  jaundice,  and  we  cannot  guarantee  that  similar  events  will  not  happen  in  the  future.  Addionally,  the  FDA
expressed safety concerns related to the risk of drug-induced liver injury in the CRL that it issued in March 2022.

Serious adverse events considered related to vadadustat, including those noted in the CRL, and any other product candidates could have material adverse
consequences on the development and potenal approval of vadadustat or our other product candidates and our business as a whole. Our understanding of
adverse events in prior clinical trials of our product candidates may change as we gather more informaon, the FDA may not agree with our assessment of
adverse events and addional unexpected adverse events may be observed in future clinical trials or in the market.

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Any of the above safety data or other occurrences could delay or prevent us from achieving or maintaining markeng approval, harm or prevent sales of
Auryxia or, if approved, vadadustat or any other product or product candidate, including those that may be in-licensed or acquired, increase our expenses and
impair or prevent our ability to successfully commercialize Auryxia, vadadustat or any other products or product candidates.

In  addion,  any  post-markeng  clinical  trials  conducted,  if  successful,  may  expand  the  paent  populaons  treated  with  Auryxia,  vadadustat  or  any  other
product we acquire or for which we receive markeng approval, within or outside of their current indicaons or paent populaons, which could result in the
idenficaon  of  previously  unknown  undesirable  effects,  increased  frequency  or  severity  of  known  undesirable  effects,  or  result  in  the  idenficaon  of
unexpected safety signals. In addion, as vadadustat, if approved, and any other products are commercialized, they will be used in significantly larger paent
populaons, in less rigorously controlled environments and, in some cases, by less experienced and less expert treang praconers, than in clinical trials,
which could result in increased or more serious adverse effects being reported. As a result, regulatory authories, healthcare praconers, third party payors
or paents may perceive or conclude that the use of Auryxia, vadadustat, if approved, or any other products are associated with serious adverse effects,
undermining our commercializaon efforts.

Risks Related to Regulatory Approval

We may not be able to obtain markeng approval for vadadustat or any other product candidate, or we may experience significant delays in doing so, any
of which would materially harm our business.

Clinical trials, manufacturing and markeng of any product or product candidate are subject to extensive and rigorous review and regulaon by numerous
governmental authories in the U.S. and other jurisdicons. Before obtaining markeng approval for the commercial sale of any product candidate, we must
demonstrate  through  extensive  preclinical  tesng  and  clinical  trials  that  the  product  candidate  is  safe  and  effecve  for  use  in  each  target  indicaon.  This
process  can  take  many  years  and  markeng  approval  may  never  be  achieved.  Of  the  large  number  of  drugs  in  development  in  the  U.S.  and  in  other
jurisdicons,  only  a  small  percentage  successfully  complete  the  FDA’s  and  other  jurisdicons’  markeng  approval  processes  and  are  commercialized.
Accordingly,  even  if  we  are  able  to  obtain  the  requisite  capital  to  connue  to  fund  our  development  efforts,  we  may  be  unable  to  successfully  obtain
regulatory approval for vadadustat or any other product or product candidate, including those that may be in-licensed or acquired.

We  are  not  permied  to  market  vadadustat  in  the  U.S.  unless  and  unl  we  receive  approval  from  the  FDA  or  in  any  other  jurisdicon  unl  the  requisite
approval from regulatory authories in such jurisdicon is received. As a condion to receiving markeng approval for vadadustat, we may be required by the
FDA or other regulatory authories to conduct addional preclinical studies or clinical trials.

In March 2022, we received the CRL from the FDA regarding our NDA for vadadustat for the treatment of anemia due to CKD. The FDA concluded that the
data in the NDA did not support a favorable benefit-risk assessment of vadadustat for dialysis and non-dialysis paents. In October 2022, we submied the
FDRR to the FDA and focused on the favorable balance between the benefits and risks of vadadustat for the treatment of anemia due to CKD in adult paents
on dialysis in light of safety concerns expressed by the FDA in the CRL for dialysis paents related to the rate of adjudicated thromboembolic events driven by
vascular access thrombosis for vadadustat compared to the acve comparator and the risk of drug-induced liver injury. In May 2023, the OND denied our
appeal  but  provided  a  path  forward  for  us  to  resubmit  the  NDA  for  vadadustat  for  the  treatment  of  anemia  due  to  CKD  for  dialysis  dependent  paents
without  the  need  for  us  to  generate  addional  clinical  data.  In  September  2023,  we  filed  our  resubmission  to  our  NDA,  and  in  October  2023,  the  FDA
acknowledged that the resubmission was complete and set a PDUFA date of March 27, 2024. There can be no assurances that we will obtain approval for
vadadustat in a mely manner, on favorable terms, or at all. As a result, the regulatory approval process for vadadustat in the U.S. is highly uncertain. Even if
we are able to obtain approval, it will only be for paents with DD-CKD and, in any event, the expense and me to do so could adversely impact our ability to
successfully commercialize vadadustat, and our financial condion could be materially harmed.

Further, vadadustat and any other product candidate may not receive markeng approval in the U.S. even if it is approved in other countries. For example,
although vadadustat is approved in Japan for the treatment of anemia due to CKD in DD-CKD and NDD-CKD adult paents and in Europe for the treatment of
anemia due to CKD in DD-CKD paents, such approval does not guarantee approval in the U.S. by the FDA for these indicaons or at all. In addion, while
each regulatory authority makes their own assessment as to the safety and efficacy of a drug, FDA’s concern about the safety or efficacy of vadadustat or any
other product candidate could impact the regulatory authority’s decision in another country.

Obtaining markeng approval in the U.S. and other jurisdicons for any product candidate depends upon numerous factors, many of which are subject to the
substanal  discreon  of  the  regulatory  authories,  including  that  regulatory  agencies  may  not  complete  their  review  processes  in  a  mely  manner  and,
following compleon of the review process, may not grant markeng approval or such markeng approval may be limited. Furthermore, approval of a drug
does not ensure successful commercializaon. For example, on September 23, 2015, the European Commission, or EC, approved Fexeric for the control

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of hyperphosphatemia in adult paents with CKD. Pursuant to the sunset clause under EU law, the EC’s approval of Fexeric in the EU was conngent on,
among other things, our commencing markeng of Fexeric within three years; although we successfully negoated an extension to December 23, 2019, we
did not commence markeng Fexeric by such date and therefore the Fexeric approval in the EU has ceased to be valid.

In addion, the safety concerns associated with the current standard of care for the indicaons for which we are seeking markeng approval for vadadustat
may affect the FDA’s or other regulatory authories’ review of the safety results of vadadustat. Addionally, these regulatory authories may not agree with
our assessment of adverse events. Further, the policies or regulaons, or the type and amount of clinical data necessary to gain approval, may change during
the course of a product candidate’s clinical development and may vary among jurisdicons. It is possible that vadadustat will never obtain markeng approval
in the U.S. or certain other jurisdicons or for some or all of the indicaons for which we seek approval.

For  example,  changes  in  or  the  enactment  of  addional  statutes,  promulgaon  of  regulaons  or  issuance  of  guidance  during  preclinical  or  clinical
development, or comparable changes in the regulatory review process for each submied product applicaon, may cause delays in the approval or rejecon
of  an  applicaon.  For  example,  in  December  2022,  with  the  passage  of  Food  and  Drug  Omnibus  Reform  Act,  Congress  required  sponsors  to  develop  and
submit a diversity acon plan for each Phase 3 clinical trial or any other “pivotal study” of a new drug or biological product. Further, on January 31, 2022, the
new Clinical Trials Regulaon (EU) No 536/2014 became applicable in the EU and replaced the prior Clinical Trials Direcve 2001/20/EC. The new regulaon
aims at simplifying and streamlining the authorizaon, conduct and transparency of clinical trials in the EU. Under the new coordinated procedure for the
approval of clinical trials, the sponsor of a clinical trial to be conducted in more than one EU Member State will only be required to submit a single applicaon
for approval. The submission will be made through the Clinical Trials Informaon System, a new clinical trials portal overseen by the EMA and available to
clinical  trial  sponsors,  competent  authories  of  the  EU  Member  States  and  the  public.  We  have  not  previously  secured  authorizaon  to  conduct  clinical
studies in the EU pursuant to this new regulaon and, accordingly, there is a risk that we may be delayed in commencing such studies.

The FDA or other regulatory authories may delay, limit or deny approval of vadadustat for many reasons including, among others:

• we may not be able to demonstrate that vadadustat is safe and effecve in treang adult paents with anemia due to CKD to the sasfacon of the

relevant regulatory authority;

•

•

•

•

•

•

•

•

•

•

the results of our clinical trials may only be modestly posive, or there may be concerns with the profile due to efficacy or safety;

the results of our clinical trials may not meet the level of stascal or clinical significance required by the relevant regulatory authority for review
and/or markeng approval;

the relevant regulatory authority may disagree with our interpretaon of data from our preclinical studies and clinical trials;

the relevant regulatory authority may disagree with the number, design, size, conduct or implementaon of our clinical trials;

the relevant regulatory authority may not approve the formulaon, labeling or specificaons we request for vadadustat;

the relevant regulatory authority may approve vadadustat or any other product candidate for use only in a small paent populaon or for fewer or
more limited indicaons than we request;

the relevant regulatory authority may require that we conduct addional clinical trials or repeat one or more clinical trials;

the FDA or other relevant regulatory authority may require development of a REMS as a condion of approval or post-approval;

the relevant regulatory authority may grant approval conngent on the performance of costly post-markeng clinical trials;

the relevant regulatory authority's onsite inspecons may be delayed due to the recent COVID-19 pandemic or otherwise;

• we, or our CROs or other vendors, may fail to comply with GxP or fail to pass any regulatory inspecons or audits;

• we or our third party manufacturers may fail to perform in accordance with the FDA’s or other relevant regulatory authority's cGMP requirements

and guidance;

•

the  FDA  may  disagree  with  inclusion  of  data  obtained  from  certain  regions  outside  the  U.S.  to  support  the  NDA  for  potenal  reasons  such  as
differences in clinical pracce from U.S. standards;

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•

•

•

•

•

the relevant regulatory authority could deem that our financial relaonships with certain principal invesgators constute a conflict of interest, such
that the data from those principal invesgators may not be used to support our applicaons;

as  part  of  any  future  regulatory  process,  the  FDA  may  ask  an  Advisory  Commiee  to  review  porons  of  the  NDA,  the  FDA  may  have  difficulty
scheduling  an  Advisory  Commiee  meeng  in  a  mely  manner  or,  if  convened,  an  FDA  Advisory  Commiee  could  recommend  non-approval,
condions of approval or restricons on approval, and the FDA may ulmately agree with the recommendaons;

the relevant regulatory authority’s review process and decision-making regarding vadadustat and any other product candidate may be impacted by
the results of our and our competors’ clinical trials and safety concerns of marketed products used to treat the same indicaons as the indicaons
for which vadadustat and any other product candidate are being developed;

the relevant regulatory authority may not approve the manufacturing processes or facilies of third party manufacturers with whom we contract; or

the policies or regulaons of the relevant regulatory authority may significantly change in a manner that renders our clinical data insufficient for
approval or requires us to amend or submit new clinical protocols.

If we experience further delays in obtaining approval of, or if we fail to obtain approval of vadadustat for some or all of the indicaons for which we have
sought approval, the commercial prospects for vadadustat may be harmed and our ability to generate revenues will be materially impaired, which could have
a material adverse effect on our business. For example, our resubmission to our NDA for vadadustat in September 2023 focused on the favorable balance
between the benefits and risks of vadadustat for the treatment of anemia due to CKD in adult paents on dialysis.

Finally,  our  ability  to  develop  and  market  new  drug  products  may  be  impacted  by  ongoing  ligaon  challenging  the  FDA’s  approval  of  mifepristone.
Specifically, on April 7, 2023, the U.S. District Court for the Northern District of Texas stayed the approval by the FDA of mifepristone, a drug product which
was originally approved in 2000 and whose distribuon is governed by various condions adopted under a REMS. In reaching that decision, the district court
made a number of findings that may negavely impact the development, approval and distribuon of drug products in the U.S. Among other determinaons,
the district court held that plainffs were likely to prevail in their claim that FDA had acted arbitrarily and capriciously in approving mifepristone without
sufficiently considering evidence bearing on whether the drug was safe to use under the condions idenfied in its labeling. Further, the district court read
the standing requirements governing ligaon in federal court as perming a plainff to bring a lawsuit against the FDA in connecon with its decision to
approve an NDA or establish requirements under a REMS based on a showing that the plainff or its members would be harmed to the extent that FDA’s drug
approval decision effecvely compelled the plainffs to provide care for paents suffering adverse events caused by a given drug.

On April 12, 2023, the district court decision was stayed, in part, by the U.S. Court of Appeals for the Fih Circuit. Thereaer, on April 21, 2023, the U.S.
Supreme Court entered a stay of the district court’s decision, in its enrety, pending disposion of the appeal of the district court decision in the Court of
Appeals for the Fih Circuit and the disposion of any peon for a writ of cerorari to the Supreme Court. The Court of Appeals for the Fih Circuit held oral
argument in the case on May 17, 2023 and, on August 16, 2023, issued its decision. The court declined to order the removal of mifepristone from the market,
finding that a challenge to the FDA’s inial approval in 2000 is barred by the statute of limitaons. But the court did hold that plainffs were likely to prevail in
their claim that changes allowing for expanded access of mifepristone that FDA authorized in 2016 and 2021 were arbitrary and capricious. On September 8,
2023, the Jusce Department and a manufacturer of mifepristone filed peons for a writ of cerorari, requesng that the U.S. Supreme Court review the
court’s decision. On December 13, 2023, the U.S. Supreme Court granted these peons for writ of cerorari for the appeals court.

Products approved for markeng are subject to extensive post-markeng regulatory requirements and could be subject to post-markeng restricons or
withdrawal  from  the  market,  and  we  may  be  subject  to  penales,  including  withdrawal  of  markeng  approval,  if  we  fail  to  comply  with  regulatory
requirements or if we experience unancipated problems with our products, or product candidates, when and if any of them is approved.

Markeng approvals may be subject to limitaons on the approved indicated uses for which the product may be marketed or other condions of approval, or
contain  requirements  or  commitments  for  potenally  costly  post-markeng  studies  and  surveillance  to  monitor  the  safety  and  efficacy  of  the  product,
including REMS, or registries or observaonal studies. For example, in connecon with the FDA approvals of Auryxia, we inially commied to the FDA to
conduct certain post-approval pediatric studies of Auryxia under the Pediatric Research Equity Act of 2003, or PREA. Under PREA, an NDA or supplement to
an NDA for certain drug products must contain data to assess the safety and effecveness of the drug product in all relevant pediatric subpopulaons and to
support  dosing  and  administraon  for  each  pediatric  subpopulaon  for  which  the  product  is  safe  and  effecve,  unless  the  sponsor  receives  a  deferral  or
waiver from the FDA. A deferral may be granted for several reasons, including a finding that the product or therapeuc candidate is ready for approval for use
in adults before pediatric

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trials  are  complete  or  that  addional  safety  or  effecveness  data  needs  to  be  collected  before  the  pediatric  trials  begin.  With  regard  to  the
Hyperphosphatemia Indicaon for Auryxia, we inially commied to compleng the original post-approval pediatric study and subming a final report to the
FDA by December 31, 2019. However, we did not complete the study according to the original schedule and therefore did not submit the required final report
by December 31, 2019. Consequently, we received a noficaon of noncompliance with PREA. We have since been released from the original post markeng
requirement, or PMR, and a new PMR was issued that provided that the final report is due in April 2024. Therefore, this PMR trial is no longer considered
delayed and is open and acvely enrolling paents. In June 2023 we requested an extension of me for the submission of the final report and such request
was denied by the FDA in August 2023. Therefore, the final report for this PMR trial is sll due in April 2024, and we are unlikely to complete the trial by that
me. With regard to our IDA Indicaon, we inially commied to compleng the post-approval pediatric study and subming a final report to the FDA by
January 2023. We did not meet a milestone relang to this post-approval pediatric study of Auryxia in a mely manner and received a noficaon from the
FDA. Subsequently, the FDA agreed to extend the pediatric clinical trial melines for the IDA Indicaon. We subsequently communicated to the FDA that we
would be delaying the start of the clinical trial in the IDA Indicaon while we work to produce smaller size tablets. In response, the FDA issued a paral clinical
hold unl we manufacture the smaller tablets and provide the FDA with relevant informaon regarding the smaller sized tablets for review. The FDA lied the
paral clinical hold in June 2022, however, we have not commenced start-up of this study pending resoluon of the manufacturing of the smaller size tablets.
If we are unable to complete these studies successfully by the applicable deadline, or have further delays in compleng these studies, we will need to inform
the FDA, have further discussions and, if the FDA finds that we failed to comply with pediatric study requirements, in violaon of applicable law, it could
instute enforcement proceedings to seize or enjoin the sale of Auryxia or seek civil penales, which would have a material adverse impact on our ability to
commercialize Auryxia and our ability to generate revenues from Auryxia.

In addion, the manufacturing processes, labeling, packaging, distribuon, adverse event reporng, storage, adversing, promoon and recordkeeping for
Auryxia,  vadadustat,  if  approved,  and  any  other  product  for  which  we  receive  regulatory  approval  will  be  subject  to  extensive  and  ongoing  regulatory
requirements  and  guidance.  These  requirements  and  guidance  include  manufacturing  processes  and  procedures  (including  record  keeping),  the
implementaon  and  operaon  of  quality  systems  to  control  and  assure  the  quality  of  the  product,  submissions  of  safety  and  other  post-markeng
informaon  and  reports,  as  well  as  connued  compliance  with  cGMPs  and  GCPs  for  any  clinical  trials  that  we  conduct  post-approval.  If  we,  our  contract
manufacturing  organizaons,  or  CMOs,  or  other  third  pares  we  engage  fail  to  adhere  to  such  regulatory  requirements  and  guidance,  we  could  suffer
significant  consequences,  including  product  seizures  or  recalls,  loss  of  product  approval,  fines  and  sancons,  reputaonal  damage,  loss  of  customer
confidence,  shipment  delays,  inventory  shortages,  inventory  write-offs  and  other  product-related  charges  and  increased  manufacturing  costs,  and  our
development or commercializaon efforts may be materially harmed.

Post-approval  discovery  of  previously  unknown  problems  with  an  approved  product,  including  adverse  events  of  unancipated  severity  or  frequency  or
relang to manufacturing operaons or processes, or failure to comply with regulatory requirements, may result in, among other things:

•

restricons on the markeng, distribuon, use or manufacturing of the product;

• withdrawal of the product from the market, or product recalls;

•

•

restricons on the labeling or markeng of a product;

fines, restuon or disgorgement of profits or revenues;

• warning or untled leers or clinical holds;

•

•

•

•

refusal  by  the  FDA  or  other  regulatory  authories  to  approve  pending  applicaons  or  supplements  to  approved  applicaons  filed  by  us,  or
suspension or revocaon of product approvals;

product seizure or detenon, or refusal to permit the import or export of products;

REMS; and

injuncons or the imposion of civil or criminal penales.

For example, we previously had three limited, voluntary recalls of Auryxia. These and any other recalls or any supply, quality or manufacturing issues in the
future could result in significant negave consequences, including reputaonal harm, loss of customer confidence, and a negave impact on our financials,
any of which could have a material adverse effect on our business and results of operaons, and may impact our ability to supply Auryxia in Japan, Vafseo in
Japan and Europe or vadadustat, if approved in other countries, for commercial and clinical use.

Non-compliance with the FDA, the EMA, the PMDA and other regulatory authories’ requirements regarding safety monitoring or pharmacovigilance can also
result in significant financial penales.

The  FDA’s  policies  and  those  of  other  regulatory  authories  may  change,  and  addional  government  regulaons  may  be  enacted.  We  cannot  predict  the
likelihood, nature or extent of government regulaons that may arise from future legislaon

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or administrave acon, either in the U.S. or in other jurisdicons. If we are slow or unable to adapt to changes in exisng requirements or the adopon of
new requirements or policies, or are not able to maintain regulatory compliance, we may lose any markeng approval that we may have obtained and we
may not achieve or sustain profitability, which would materially adversely affect our business.

Risks Related to Governmental Regulaon and Compliance

We are subject to complex regulatory schemes that require significant resources to ensure compliance and our failure to comply with applicable laws could
subject  us  to  government  scruny  or  enforcement,  potenally  resulng  in  costly  invesgaons,  fines,  penales  or  sancons,  contractual  damages,
reputaonal harm, administrave burdens and diminished profits and future earnings.

In general, a variety of laws apply to us or may otherwise restrict our acvies, including the following:

•

•

•

•

•

•

•

laws and regulaons governing the conduct of preclinical studies and clinical trials in the U.S. and other countries in which we are conducng such
studies;

an-corrupon and an-bribery laws, including the FCPA, the UK Bribery Act and various other an-corrupon laws in countries outside of the U.S.;

data privacy laws exisng in the U.S., the EU, the UK and other countries in which we operate, including the U.S. Health Insurance Portability and
Accountability  Act  of  1996,  or  HIPAA,  as  amended  by  the  Health  Informaon  Technology  for  Economic  and  Clinical  Health  Act,  or  HITECH,  state
privacy and data protecon laws, such as the California Consumer Privacy Act, or CCPA, as amended by the California Privacy Rights Act of 2020, or
CPRA, as well as other state consumer protecon laws, GDPR, any addional applicable EU member state, or EU Member State, data protecon laws
in force from me to me, the retained EU law version of the General Data Protecon Regulaon as saved into United Kingdom law by virtue of
secon 3 of the United Kingdom's European Union (Withdrawal) Act 2018, or the EU GDPR;

federal and state laws requiring the submission of accurate product prices and noficaons of price increases;

federal and state securies laws;

environmental, health and safety laws and regulaons; and

internaonal  trade  laws,  which  are  laws  that  regulate  the  sale,  purchase,  import,  export,  re-export,  transfer  and  shipment  of  goods,  products,
materials, services and technology.

In addion, our relaonships with healthcare providers, physicians and third party payors expose us to broadly applicable fraud and abuse laws that may
constrain the business or financial arrangements and relaonships through which we market, sell and distribute Auryxia and vadadustat, if approved, and any
other  products  for  which  we  may  obtain  markeng  approval.  As  such,  these  arrangements  are  subject  to  applicable  an-kickback,  fraud  and  abuse,  false
claims,  transparency,  health  informaon  privacy  and  security,  and  other  healthcare  laws  and  regulaons  at  federal,  state  and  internaonal  levels.  These
restricons include, but are not limited to, the following:

•

•

•

•

•

the Food, Drug and Cosmec Act of 1938, as amended, or FDCA, which among other things, strictly regulates drug product markeng and promoon
and prohibits manufacturers from markeng such products for off-label use;

federal laws that require pharmaceucal manufacturers to report certain calculated product prices to the government or provide certain discounts
or rebates to government authories or private enes, oen as a condion of reimbursement under government healthcare programs, and laws
requiring noficaon of price increases;

the  federal  An-Kickback  Statute,  which  prohibits,  among  other  things,  persons  from  knowingly  and  willfully  solicing,  offering,  receiving  or
providing remuneraon, directly or indirectly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, or the
purchase, order or recommendaon or arranging of, any good or service, for which payment may be made under a federal healthcare program such
as Medicare and Medicaid;

the federal False Claims Act, which imposes criminal and civil penales, including through civil whistleblower or qui tam acons, against individuals
or enes for, among other things, knowingly presenng, or causing to be presented, false or fraudulent claims for payment by a federal healthcare
program or making a false statement or record material to payment of a false claim or avoiding, decreasing or concealing an obligaon to pay money
to  the  federal  government,  with  potenal  liability  including  mandatory  treble  damages  and  significant  per-claim  penales,  and  violaons  of  the
FDCA, the federal government pricing laws, and the federal An-Kickback Statute trigger liability under the federal False Claims Act;

HIPAA,  which  imposes  criminal  and  civil  liability  for  execung  a  scheme  to  defraud  any  healthcare  benefit  program  or  making  false  statements
relang to healthcare maers;

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•

•

•

HIPAA, as amended by the HITECH, and their respecve implemenng regulaons, also imposes obligaons, including mandatory contractual terms,
with respect to safeguarding the privacy, security and transmission of individually idenfiable health informaon;

the  federal  Open  Payments  Act  (the  former  Physician  Payments  Sunshine  Act)  requires  applicable  manufacturers  of  covered  drugs  to  report
payments  and  other  transfers  of  value  to  physicians,  other  healthcare  providers  and  teaching  hospitals,  as  well  as  ownership  and  investment
interests held by physicians and their immediate family members;

analogous state and foreign laws and regulaons, such as state an-kickback and false claims laws and gi ban and transparency statutes, which may
apply to sales or markeng arrangements and claims involving healthcare items or services reimbursed by state Medicaid or other programs, or non-
governmental third party payors, including private insurers, and which are not preempted by federal laws and oen differ from state to state, thus
complicang compliance efforts; and

• U.S.  state  laws  restricng  interacons  with  healthcare  providers  and  other  members  of  the  healthcare  community  or  requiring  pharmaceucal

manufacturers to implement certain compliance standards, which vary from state to state.

Because of the breadth of these U.S. laws, and their non-U.S. equivalents, and the narrowness of the statutory excepons and safe harbors available, it is
possible  that  some  of  our  business  acvies  could  be  subject  to  challenge  under  one  or  more  of  such  laws.  In  addion,  recent  healthcare  reforms  have
strengthened  these  laws.  For  example,  the  Health  Care  Reform  Act,  among  other  things,  amended  the  intent  requirement  of  the  federal  An-Kickback
Statute. A person or enty no longer needs to have actual knowledge of the statute or specific intent to violate the law. The Health Care Reform Act also
amended the False Claims Act, such that violaons of the An-Kickback Statute are now deemed violaons of the False Claims Act.

Some  state  laws  require  pharmaceucal  companies  to  comply  with  the  pharmaceucal  industry’s  voluntary  compliance  guidelines,  such  as  the
Pharmaceucal Research and Manufacturers of America Code on Interacons with Health Care Professionals, known as the PhRMA Code. Addionally, some
state and local laws require the registraon and specific training of pharmaceucal sales representaves in the jurisdicon. State and foreign laws also govern
the privacy and security of health informaon in some circumstances, many of which differ from each other in significant ways and oen are not preempted
by HIPAA.

Efforts to ensure that our business complies with applicable healthcare laws and regulaons involves substanal costs and requires us to expend significant
resources. One of the potenal areas for governmental scruny involves federal and state requirements for pharmaceucal manufacturers to submit accurate
price reports to the government. Because our processes for calculang applicable government prices and the judgments involved in making these calculaons
involve subjecve decisions and complex methodologies, these calculaons are subject to risk of errors and differing interpretaons. In addion, they are
subject to review and challenge by the applicable governmental agencies, or potenal qui tam complaints, and it is possible that such reviews could result in
changes, recalculaons, or defense costs that may have adverse legal or financial consequences. It is possible that governmental authories will conclude that
our business pracces may not comply with current or future statutes, regulaons or case law involving applicable fraud and abuse or other healthcare laws
and regulaons. If our operaons are found to be in violaon of any of these laws or any other governmental regulaons that may apply to us, we may be
subject to significant civil, criminal and administrave penales, damages, fines, imprisonment, exclusion of products from government funded healthcare
programs, such as Medicare and Medicaid, and the curtailment or restructuring of our operaons, any of which could materially adversely affect our business
and  would  result  in  increased  costs  and  diversion  of  management  aenon  and  could  negavely  impact  the  development,  regulatory  approval  and
commercializaon  of  Auryxia  or  vadadustat,  any  of  which  could  have  a  material  adverse  effect  on  our  business.  Further,  if  any  of  the  physicians  or  other
healthcare providers or enes with whom we expect to do business is found to be not in compliance with applicable laws, they may be subject to criminal,
civil or administrave sancons, including exclusions from parcipaon in government funded healthcare programs.

We will incur significant liability if it is determined that we are promong any “off-label” use of Auryxia or any other product we may develop, in-license or
acquire or if it is determined that any of our acvies violates the federal An-Kickback Statute.

Physicians are permied to prescribe drug products for uses that differ from those approved by the FDA or other applicable regulatory agencies. Although the
FDA  and  other  regulatory  agencies  do  not  regulate  a  physician’s  choice  of  treatments,  the  FDA  and  other  regulatory  agencies  do  restrict  manufacturer
communicaons regarding unapproved uses of an approved drug. Companies are not permied to promote drugs for unapproved uses or in a manner that is
inconsistent with the FDA-approved labeling. There are also restricons about making comparave or superiority claims based on safety or efficacy that are
not supported by substanal evidence. Accordingly, we may not promote Auryxia in the U.S. for use in any indicaons other than the Hyperphosphatemia
Indicaon and the IDA Indicaon, and all promoonal claims must be consistent with the FDA-approved labeling for Auryxia.

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Promong a drug off-label is a violaon of the FDCA and can give rise to liability under the federal False Claims Act, as well as under addional federal and
state  laws  and  insurance  statutes.  The  FDA,  the  Department  of  Jusce  and  other  regulatory  and  enforcement  authories  enforce  laws  and  regulaons
prohibing promoon of off-label uses and the promoon of products for which markeng approval has not been obtained, as well as the false adversing or
misleading promoon of drugs. In September 2021, the FDA published final regulaons which describe the types of evidence that the agency will consider in
determining the intended use of a drug product. In addion, laws and regulaons govern the distribuon and tracing of prescripon drugs and prescripon
drug samples, including the Prescripon Drug Markeng Act of 1976 and the Drug Supply Chain Security Act, which regulate the distribuon and tracing of
prescripon  drugs  and  prescripon  drug  samples  at  the  federal  level  and  set  minimum  standards  for  the  regulaon  of  drug  distributors  by  the  states.  A
company that is found to have improperly promoted off-label uses or to have otherwise engaged in false or misleading promoon or improper distribuon of
drugs  will  be  subject  to  significant  liability,  potenally  including  civil  and  administrave  remedies  as  well  as  criminal  sancons.  It  may  also  be  subject  to
exclusion and debarment from federal healthcare reimbursement programs.

Notwithstanding  the  regulatory  restricons  on  off-label  promoon,  the  FDA  and  other  regulatory  authories  allow  companies  to  engage  in  truthful,  non-
misleading,  and  non-promoonal  scienfic  communicaons  concerning  their  products  in  certain  circumstances.  For  example,  in  October  2023,  the  FDA
published dra guidance outlining the agency’s non-binding policies governing the distribuon of scienfic informaon on unapproved uses to healthcare
providers. This dra guidance calls for such communicaons to be truthful, non-misleading, factual, and unbiased and include all informaon necessary for
healthcare providers to interpret the strengths and weaknesses and validity and ulity of the informaon about the unapproved use. In addion, under some
relavely  recent  guidance  from  the  FDA  and  the  Pre-Approval  Informaon  Exchange  Act,  or  PIE  Act,  signed  into  law  as  part  of  the  Consolidated
Appropriaons  Act  of  2023,  or  the  Consolidated  Appropriaons  Act,  companies  may  also  promote  informaon  that  is  consistent  with  the  prescribing
informaon and proacvely speak to formulary commiee members of payors regarding data for an unapproved drug or unapproved uses of an approved
drug. We intend to engage in these discussions and communicate with healthcare providers, payors and other constuencies in compliance with all applicable
laws, regulatory guidance and industry best pracces. Although we believe we have put in place a robust compliance program and processes designed to
ensure  that  all  such  acvies  are  performed  in  a  legal  and  compliant  manner,  such  program  and  processes  may  not  be  sufficient  to  deter  or  detect  all
violaons,  and  we  will  need  to  carefully  navigate  the  FDA’s  various  regulaons,  guidance  and  policies,  along  with  recently  enacted  legislaon,  to  ensure
compliance with restricons governing promoon of our products.

In addion, if a company’s acvies are determined to have violated the federal An-Kickback Statute, this can also give rise to liability under the federal False
Claims  Act  and  such  violaons  can  result  in  significant  fines,  criminal  and  civil  remedies,  and  exclusion  from  Medicare  and  Medicaid.  There  is  increased
government focus on relaonships between the pharmaceucal industry and physicians, pharmacies (especially specialty pharmacies), and other sources of
referrals.  Common  industry  acvies,  such  as  speaker  programs,  insurance  assistance  and  support,  relaonships  with  foundaons  providing  copayment
assistance, and relaonships with paent organizaons and paents are receiving increased governmental aenon. If any of our relaonships or acvies is
determined to violate applicable federal and state an-kickback laws, false claims laws, or other laws or regulaons, the company and/or company execuves,
employees, and other representaves could be subject to significant fines and criminal sancons, imprisonment, and potenal exclusion from Medicare and
Medicaid, and could harm our reputaon or result in significant legal expenses and distracon of management.

Disrupons  in  the  FDA,  regulatory  authories  outside  the  U.S.  and  other  government  agencies  caused  by  global  health  concerns  or  funding  shortages
could prevent new products and services from being developed or commercialized in a mely manner, which could negavely impact our business.

The ability of the FDA and regulatory authories outside the U.S. to review and approve new products can be affected by a variety of factors, including global
health concerns, government budget and funding levels, staffing shortages, statutory, regulatory, and policy changes and other events that may otherwise
affect the FDA’s or other regulatory authories' ability to perform roune funcons. Average review mes at the FDA have fluctuated in recent years as a
result of certain of these factors. In addion, government funding of other government agencies that fund R&D acvies is subject to the polical process,
which is inherently fluid and unpredictable. Disrupons at the FDA and other agencies may increase the me necessary for new drugs to be reviewed or
approved by necessary government agencies, which would adversely affect our business. If a prolonged government shutdown occurs, it could significantly
impact the ability of the FDA or other regulatory authories to mely review and process our, or our collaboraon partners', regulatory submissions, which
could have a material adverse effect on our business.

If  a  prolonged  government  shutdown  occurs,  or  if  global  health  concerns  prevent  the  FDA  or  other  regulatory  authories  from  conducng  their  regular
inspecons, reviews, or other regulatory acvies, it could significantly impact the ability of the FDA or other regulatory authories to mely review and
process our regulatory submissions, which could have a material adverse effect on our business.

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Compliance with privacy and data security requirements could result in addional costs and liabilies to us or inhibit our ability to collect and process data
globally, and the failure to comply with such requirements could subject us to significant fines and penales, which may have a material adverse effect on
our business, financial condion or results of operaons.

The regulatory framework for the collecon, use, safeguarding, sharing, transfer and other processing of informaon worldwide is rapidly evolving and is
likely  to  remain  uncertain  for  the  foreseeable  future.  Globally,  virtually  every  jurisdicon  in  which  we  operate  has  established  its  own  data  security  and
privacy  frameworks  with  which  we  must  comply.  For  example,  the  collecon,  use,  disclosure,  transfer,  or  other  processing  of  personal  data  regarding
individuals in the EU, including personal health data, is subject to the GDPR, which took effect across all member states of the EEA, in May 2018. Following
the withdrawal of the UK from the EU, the UK Data Protecon Act 2018 applies to the processing of personal data that takes place in the UK and includes
parallel obligaons to those set forth by GDPR. The GDPR is wide-ranging in scope and imposes numerous requirements on companies that process personal
data when required, including requirements relang to processing health and other sensive data, obtaining consent of the individuals to whom the personal
data relates, when required, providing informaon to individuals regarding data processing acvies, implemenng safeguards to protect the security and
confidenality  of  personal  data,  providing  noficaon  of  data  breaches,  and  taking  certain  measures  when  engaging  third  party  processors.  The  GDPR
increases our obligaons as a sponsor in clinical trials in the EEA by expanding the definion of personal data to include coded data and requiring changes to
informed consent pracces and more detailed noces for clinical trial paents and invesgators. The GDPR also permits data protecon authories to require
destrucon of improperly gathered or used personal informaon and/or impose substanal fines for violaons of the GDPR, which can be up to four percent
of the total worldwide annual turnover of a group of companies from the preceding financial year or 20 million Euros, whichever is greater, and it also confers
a  private  right  of  acon  on  data  subjects  and  consumer  associaons  to  lodge  complaints  with  supervisory  authories,  seek  judicial  remedies,  and  obtain
compensaon for damages resulng from violaons of the GDPR. In addion, the GDPR provides that EU Member States may make their own further laws
and regulaons liming the processing of personal data, including genec, biometric or health data and permits EU Member States to adopt further penales
for violaons that are not subject to the administrave fines outlined in the GDPR.

The GDPR also imposes strict rules on the transfer of personal data to countries outside the EU, including the U.S. and, as a result, increases the scruny that
we should apply to transfers of personal data from such sites to countries that are considered to lack an adequate level of data protecon, such as the U.S.
There is ongoing uncertainty about the transfer mechanisms that companies rely upon to enable the legal transfer of personal data from the EU to other
countries. For example, in July 2020, the Court of Jusce of the European Union, or the CJEU, invalidated the EU-U.S. Privacy Shield, one of the mechanisms
used to legimize the transfer of personal data from the EEA to the U.S. Although a new Data Privacy Framework has been adopted, as court decisions and
regulatory  guidance  evolves,  challenges  remain  with  respect  to  GDPR  compliance.  Companies  must  connue  to  monitor  the  regulatory  landscape  and
implement necessary changes, all of which may be costly and may put the company out of compliance while any changes are being implemented.

Following the withdrawal of the UK from the EU, the UK Data Protecon Act 2018 applies to the processing of personal data that takes place in the UK and
includes parallel obligaons to those set forth by GDPR. In relaon to data transfers, both the UK and the EU have determined, through separate “adequacy”
decisions, that data transfers between the two jurisdicons are in compliance with the UK Data Protecon Act and the GDPR, respecvely. The UK and the
U.S. have also agreed to a U.S.-UK “Data Bridge”, which funcons similarly to the EU-U.S. Data Privacy Framework and provides an addional legal mechanism
for companies to transfer data from the UK to the U.S. In addion to the UK, Switzerland has approved an adequacy decision in relaon to the Swiss-U.S. Data
Privacy  Framework  (which  would  funcon  similarly  to  the  EU-U.S.  Data  Privacy  Framework  and  the  U.S.-UK  Data  Bridge  in  relaon  to  data  transfers  from
Switzerland to the U.S.). Any changes or updates to these developments have the potenal to impact our business.

Addionally, in October 2022, President Biden signed an execuve order to implement the EU-U.S. Data Privacy Framework, which serves as a replacement to
the EU-U.S. Privacy Shield. The EU iniated the process to adopt an adequacy decision for the EU-U.S. Data Privacy Framework in December 2022, and the EC
adopted the adequacy decision on July 10, 2023. The adequacy decision permits U.S. companies who self-cerfy to the EU-U.S. Data Privacy Framework to
rely on it as a valid data transfer mechanism for data transfers from the EU to the U.S. However, some privacy advocacy groups have already challenged or
suggested that they will be challenging the EU-U.S. Data Privacy Framework. If these challenges are successful, they may not only impact the EU-U.S. Data
Privacy Framework, but also further limit the viability of the standard contractual clauses and other data transfer mechanisms. The uncertainty around this
issue has the potenal to impact our business internaonally.

Given the breadth and depth of changes in data protecon obligaons, complying with the GDPR’s requirements is rigorous and me intensive and requires
significant resources and a review of our technologies, systems and pracces, as well as those of any third party collaborators, service providers, contractors
or consultants that process or transfer personal data collected in the EU. The GDPR and other changes in laws or regulaons associated with the enhanced
protecon of certain types of sensive data, such as healthcare data or other personal informaon from our clinical trials, could require us to change our

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business pracces and put in place addional compliance mechanisms, may interrupt or delay our development, regulatory and commercializaon acvies
and increase our cost of doing business, and could lead to government enforcement acons, private ligaon and significant fines and penales against us
and could have a material adverse effect on our business, financial condion or results of operaons.

Similar privacy and data security requirements are either in place or underway in the U.S. There are a broad variety of data protecon laws that may be
applicable to our acvies, and a range of enforcement agencies at both the state and federal levels that can review companies for privacy and data security
concerns. The Federal Trade Commission, or the FTC, and state Aorneys General all are aggressive in reviewing privacy and data security protecons for
consumers. For example, the FTC has been parcularly focused on the unpermied processing of health and genec data through its recent enforcement
acons and is expanding the types of privacy violaons that it interprets to be “unfair” under Secon 5 of the Federal Trade Commission Act, as well as the
types of acvies it views to trigger the Health Breach Noficaon Rule (which the FTC also has the authority to enforce). The agency is also in the process of
developing rules related to commercial surveillance and data security that may impact our business. We will need to account for the FTC’s evolving rules and
guidance for proper privacy and data security pracces in order to migate our risk for a potenal enforcement acon, which may be costly. If we are subject
to a potenal FTC enforcement acon, we may be subject to a selement order that requires us to adhere to very specific privacy and data security pracces,
which may impact our business. We may also be required to pay fines as part of a selement (depending on the nature of the alleged violaons). If we violate
any consent order that we reach with the FTC, we may be subject to addional fines and compliance requirements.

New laws also are being considered at both the state and federal levels. For example, the CCPA, which went into effect on January 1, 2020, and the CPRA,
which amends CCPA by expanding the scope and applicability, while also introducing new privacy protecons, is creang similar risks and obligaons as those
created by GDPR. In November 2020, California voters passed a ballot iniave for the CPRA, which went into effect on January 1, 2023 and significantly
expanded the CCPA to incorporate addional GDPR-like provisions including requiring that the use, retenon and sharing of personal informaon of California
residents  be  reasonably  necessary  and  proporonate  to  the  purposes  of  collecon  or  processing,  granng  addional  protecons  for  sensive  personal
informaon, and requiring greater disclosures related to noce to residents regarding retenon of informaon. The CPRA also creates a new agency that is
specifically responsible for enforcing the new law and other California privacy laws. Because of this, we may need to engage in addional acvies (e.g., data
mapping) to idenfy the personal informaon we are collecng and the purposes for which such informaon is collected. In addion, we will need to ensure
that our policies recognize the rights granted to consumers (as that phrase is broadly defined in the CCPA and can include business contact informaon).

In addion to California, at least eleven other states have passed comprehensive privacy laws similar to the CCPA and CPRA. These laws are either in effect or
will go into effect someme before the end of 2026. Like the CCPA and CPRA, these laws create obligaons related to the processing of personal informaon,
as well as special obligaons for the processing of “sensive” data (which includes health data in some cases). Some of the provisions of these laws may apply
to our business acvies. There are also states that are strongly considering or have already passed comprehensive privacy laws during the 2023 legislave
sessions that will go into effect in 2025 and beyond, including New Hampshire and New Jersey. Other states will be considering these laws in the future, and
Congress has also been debang passing a federal privacy law. There are also states that are specifically regulang health informaon that may affect our
business. For example, Washington state passed a health privacy law in 2023 that will regulate the collecon and sharing of health informaon, and the law
also  has  a  private  right  of  acon,  which  further  increases  the  relevant  compliance  risk.  Conneccut  and  Nevada  have  also  passed  similar  laws  regulang
consumer  health  data  and  addional  states  (including  Vermont)  are  considering  such  legislaon  for  2024.  These  laws  may  impact  our  business  acvies,
including our idenficaon of research subjects, relaonships with business partners and ulmately the markeng and distribuon of our products.

A broad range of legislave measures also have been introduced at the federal level. Accordingly, failure to comply with current and any future federal and
state laws regarding privacy and security of personal informaon could expose us to fines and penales. We also face a threat of potenal consumer class
acons related to these laws and the overall protecon of personal data. Even if we are not determined to have violated these laws, invesgaons into these
issues typically require the expenditure of significant resources and generate negave publicity, which could harm our reputaon and our business.

Legislave and regulatory healthcare reform may increase the difficulty and cost for us to obtain markeng approval of and commercialize our product
candidates and affect the prices we may obtain for any products that are approved in the U.S. or foreign jurisdicons.

In the U.S. and some foreign jurisdicons, there have been a number of legislave and regulatory changes and proposed changes regarding the healthcare
system that could prevent or delay markeng approval of vadadustat, or any other product candidate, restrict or regulate post-approval acvies and affect
our  ability  to  profitably  sell  Auryxia  and  vadadustat,  if  approved.  The  pharmaceucal  industry  has  been  a  parcular  focus  of  these  efforts  and  has  been
significantly affected by legislave iniaves. Current laws, as well as other healthcare reform measures that may be adopted in the future, may result

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in  more  rigorous  coverage  criteria  and  addional  downward  pressure  on  the  price  that  we  receive  for  any  FDA  approved  product,  such  as  Auryxia  or
vadadustat, if approved, or any reimbursement that physicians receive for administering any approved product.

In  the  U.S.  the  Medicare  Prescripon  Drug,  Improvement,  and  Modernizaon  Act  of  2003,  or  the  MMA,  changed  the  way  Medicare  covers  and  pays  for
pharmaceucal products. The legislaon expanded Medicare coverage for drug purchases by the elderly and introduced a new reimbursement methodology
based on average sales prices for physician-administered drugs. In addion, this legislaon provided authority for liming the number of drugs that will be
covered in any therapeuc class. Cost reducon iniaves and other provisions of this legislaon could decrease the coverage and price that we receive for
Auryxia and any other approved products. While the MMA applies only to drug benefits for Medicare beneficiaries, private payors oen follow Medicare
coverage policy and payment limitaons in seng their own reimbursement rates. Therefore, any reducon in reimbursement that results from the MMA
may result in a similar reducon in payments from private payors.

In March 2010, President Obama signed into law the Paent Protecon and Affordable Care Act, as amended by the Health Care and Educaon Reconciliaon
Act of 2010, or, collecvely, the ACA. In addion, other legislave and regulatory changes have been proposed and adopted since the ACA was enacted. These
changes include the Budget Control Act of 2011, which, among other things, led to aggregate reducons to Medicare payments to providers of up to 2% per
fiscal year, which will remain in effect through 2031.

Under current legislaon, the actual reducons in Medicare payments may vary up to 4%. The Consolidated Appropriaons Act, which was signed into law by
President Biden in December 2022, made several changes to sequestraon of the Medicare program. Secon 1001 of the Consolidated Appropriaons Act
delays the 4% Statutory Pay-As-You-Go Act of 2010 (PAYGO) sequester for two years, through the end of calendar year 2024. Triggered by enactment of the
American Rescue Plan Act of 2021, the 4% cut to the Medicare program would have taken effect in January 2023. The Consolidated Appropriaons Act’s
health care offset tle includes Secon 4163, which extends the 2% Budget Control Act of 2011 Medicare sequester for six months into fiscal year 2032 and
lowers the payment reducon percentages in fiscal years 2030 and 2031.

The American Taxpayer Relief Act of 2012, which, among other things, reduced Medicare payments to several types of providers and increased the statute of
limitaons period for the government to recover overpayments to providers from three to five years. In addion, other legislave and regulatory changes
have  been  proposed,  but  not  yet  adopted.  For  example,  in  July  2019,  the  U.S.  Department  of  Health  and  Human  Services,  or  HHS,  proposed  regulatory
changes  in  kidney  health  policy  and  reimbursement.  Any  new  legislave  or  regulatory  changes  may  result  in  addional  reducons  in  Medicare  and  other
healthcare  funding  and  otherwise  affect  the  prices  we  may  obtain  for  Auryxia  or  vadadustat,  if  approved,  or  the  frequency  with  which  Auryxia  and
vadadustat, if approved, is prescribed or used.

The costs and prices of prescripon pharmaceucals have also been the subject of considerable discussion in the U.S. To date, there have been several recent
U.S. congressional inquiries and proposed and enacted state and federal legislaon designed to, among other things, bring more transparency to drug pricing,
review  the  relaonship  between  pricing  and  manufacturer  paent  programs,  reduce  the  costs  of  drugs  under  Medicare  and  reform  government  program
reimbursement methodologies for drug products. At the federal level, Congress and the current administraon have each indicated that it will connue to
seek new legislave and/or administrave measures to control drug costs.

For example, the former administraon issued several execuve orders intended to lower the costs of prescripon products and certain provisions in these
orders have been incorporated into regulaons. These regulaons include an interim final rule implemenng a most favored naon model for prices that
would e Medicare Part B payments for certain physician-administered pharmaceucals to the lowest price paid in other economically advanced countries,
effecve January 1, 2021. That rule, however, has been subject to a naonwide preliminary injuncon and, on December 29, 2021, CMS issued a final rule to
rescind it. With issuance of this rule, CMS stated that it will explore all opons to incorporate value into payments for Medicare Part B pharmaceucals and
improve beneficiaries' access to evidence-based care.

In addion, in October 2020, the HHS and the FDA published a final rule allowing states and other enes to develop a Secon 804 Importaon Program to
import certain prescripon drugs from Canada into the U.S. That regulaon was challenged in a lawsuit by the Pharmaceucal Research and Manufacturers of
America, or PhRMA, but the case was dismissed by a federal district court in February 2023 aer the court found that PhRMA did not have standing to sue
HHS. Nine states (Colorado, Florida, Maine, New Hampshire, New Mexico, North Dakota, Texas, Vermont and Wisconsin) have passed laws allowing for the
importaon of drugs from Canada. Certain of these states have submied Secon 804 Importaon Program proposals and are awaing FDA approval. On
January 5, 2023, the FDA approved Florida’s plan for Canadian drug importaon.

Further,  on  July  9,  2021,  President  Biden  signed  Execuve  Order  14063,  which  focuses  on,  among  other  things,  the  price  of  pharmaceucals.  The  Order
directs HHS to create a plan within 45 days to combat “excessive pricing of prescripon pharmaceucals and enhance domesc pharmaceucal supply chains,
to reduce the prices paid by the federal government for such pharmaceucals, and to address the recurrent problem of price gouging.” On September 9,
2021, HHS released its

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plan to reduce pharmaceucal prices. The key features of that plan are to: (a) make pharmaceucal prices more affordable and equitable for all consumers
and  throughout  the  health  care  system  by  supporng  pharmaceucal  price  negoaons  with  manufacturers;  (b)  improve  and  promote  compeon
throughout the prescripon pharmaceucal industry by supporng market changes that strengthen supply chains, promote biosimilars and generic drugs,
and increase transparency; and (c) foster scienfic innovaon to promote beer healthcare and improve health by supporng public and private research and
making sure that market incenves promote discovery of valuable and accessible new treatments.

On August 16, 2022, the Inflaon Reducon Act of 2022, or IRA, was signed into law by President Biden. The new legislaon has implicaons for Medicare
Part D, which is a program available to individuals who are entled to Medicare Part A or enrolled in Medicare Part B to give them the opon of paying a
monthly premium for outpaent prescripon drug coverage. Among other things, the IRA imposes rebates under Medicare Part B and Medicare Part D to
penalize price increases that outpace inflaon (first due in 2023); and replaces the Part D coverage gap discount program with a new discounng program
(beginning in 2025). The IRA permits the Secretary of HHS to implement many of these provisions through guidance, as opposed to regulaon, for the inial
years. We consider many factors when we implement a price increase for a product, including historical and potenal future inflaon rates. However, there
are many variables that are outside of our control and if we increase the price of Auryxia or vadadustat, if approved, faster than the pace of inflaon, we
would be subject to addional rebates under Medicare, which could have a material adverse effect on our product revenues.

As an oral drug, Auryxia is covered by Medicare under Part D. In January 2011, CMS implemented the ESRD PPS, a prospecve payment system for dialysis
treatment. Under the ESRD PPS, CMS generally makes a single bundled payment to the dialysis facility for each dialysis treatment that covers all items and
services rounely required for dialysis treatments furnished to Medicare beneficiaries in Medicare-cerfied ESRD facilies or at their home. The inclusion of
oral medicaons without injectable or intravenous equivalents such as Auryxia in the bundled payment was inially delayed by CMS unl January 1, 2014,
and through several subsequent legislave acons has been delayed unl January 1, 2025.

Absent  further  legislaon  or  regulaon  on  this  maer,  beginning  in  January  2025,  oral  ESRD-related  drugs  without  injectable  or  intravenous  equivalents,
including Auryxia and all other phosphate lowering medicaons, will be included in the ESRD bundle and separate Medicare payment for these drugs will no
longer be available, as is the case today under Medicare Part D. ESRD facilies may nonetheless receive a TDAPA for new renal dialysis drugs and biological
products that meet certain criteria for a period of two years. The TDAPA will provide separate payment based on the drug's ASP that will be in addion to the
base rate in order to facilitate the adopon of innovave therapies. There can be no assurances that CMS will determine that Auryxia will qualify for TDAPA
status or that CMS will not again delay the inclusion of these oral ESRD-related drugs in the bundled payment. Even if Auryxia is deemed eligible by CMS,
revenue for sales of Auryxia could be significantly less in the TDAPA period than it would be if Auryxia is not bundled into the ESRD PPS. Moreover, in the post-
TDAPA period, CMS currently expects to increase the single bundled payment base rate paid to the dialysis facility for each dialysis treatment to reflect that
oral only phosphate lowering drugs will be reimbursed as part of the single bundled payment for Medicare paents. There can be no assurances that any
increase in the single bundled payment base rate will be sufficient to adequately reimburse the dialysis facilies for Auryxia at a price that is profitable for us.

Specifically,  with  respect  to  price  negoaons,  Congress  authorized  Medicare  to  negoate  lower  prices  for  certain  costly  single-source  drug  and  biologic
products that do not have compeng generics or biosimilars and are reimbursed under Medicare Part B and Part D. CMS may negoate prices for ten high-
cost drugs paid for by Medicare Part D starng in 2026, followed by 15 Part D drugs in 2027, 15 Part B or Part D drugs in 2028, and 20 Part B or Part D drugs in
2029 and beyond. This provision applies to drug products that have been approved for at least 9 years and biologics that have been licensed for 13 years, but
it does not apply to drugs and biologics that have been approved for a single rare disease or condion. Further, the legislaon subjects drug manufacturers to
civil monetary penales and a potenal excise tax for failing to comply with the legislaon by offering a price that is not equal to or less than the negoated
“maximum fair price” under the law or for taking price increases that exceed inflaon. The legislaon also requires manufacturers to pay rebates for drugs in
Medicare Part D whose price increases exceed inflaon. The new law also caps Medicare out-of-pocket drug costs at an esmated $4,000 a year in 2024 and,
thereaer beginning in 2025, at $2,000 a year.

On  June  6,  2023,  Merck  &  Co.  Inc.,  or  Merck,  filed  a  lawsuit  against  HHS  and  CMS  asserng  that,  among  other  things,  the  IRA’s  Drug  Price  Negoaon
Program for Medicare constutes an uncompensated taking in violaon of the Fih Amendment of the Constuon. Subsequently, a number of other pares,
including  the  U.S.  Chamber  of  Commerce,  the  Chamber,  Bristol  Myers  Squibb  Company,  the  PhRMA,  Astellas,  Novo  Nordisk,  Janssen  Pharmaceucals,
Novars, AstraZeneca and Boehringer Ingelheim, also filed lawsuits in various courts with similar constuonal claims against HHS and CMS. We expect that
ligaon involving these and other provisions of the IRA will connue, with unpredictable and uncertain results. Accordingly, while it is currently unclear how
the IRA will be effectuated, we cannot predict with certainty what impact any federal or state health reforms will have on us, but such changes could impose
new or more stringent regulatory requirements on our acvies or result in reduced reimbursement for our products, any of which could adversely affect our
business, results of operaons and financial condion.

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At the state level, individual states are increasingly aggressive in passing legislaon and implemenng regulaons designed to control pharmaceucal and
biological product pricing, including price or paent reimbursement constraints, discounts, restricons on certain product access, markeng cost disclosure
and  transparency  measures,  and,  in  some  cases,  designed  to  encourage  importaon  from  other  countries  and  bulk  purchasing.  A  number  of  states,  for
example,  require  drug  manufacturers  and  other  enes  in  the  drug  supply  chain,  including  health  carriers,  pharmacy  benefit  managers,  wholesale
distributors,  to  disclose  informaon  about  pricing  of  pharmaceucals.  In  addion,  regional  healthcare  authories  and  individual  hospitals  are  increasingly
using bidding procedures to determine what pharmaceucal products and which suppliers will be included in their prescripon drug and other healthcare
programs. These measures could reduce the ulmate demand for our products or put pressure on our product pricing.

It is likely that federal and state legislatures within the U.S. and foreign governments will connue to consider changes to exisng healthcare legislaon. We
expect that addional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state
governments  will  pay  for  healthcare  products  and  services,  which  could  result  in  reduced  demand  for  Auryxia  and  any  product  candidates  for  which  we
receive markeng approval or addional pricing pressures. We cannot predict the reform iniaves that may be adopted in the future or whether iniaves
that have been adopted will be repealed or modified. The connuing efforts of the government, insurance companies, managed care organizaons and other
payors of healthcare services to contain or reduce costs of healthcare may adversely affect:

•

•

•

•

•

the demand for Auryxia and any products candidates for which we receive markeng approval;

our ability to set a price that we believe is fair for our products;

our ability to obtain and maintain coverage and reimbursement approval for Auryxia or any other approved product;

our ability to generate revenues and achieve or maintain profitability; and

the level of taxes that we are required to pay.

In addion, in some countries, including EU Member States, the pricing of prescripon pharmaceucals is subject to governmental control. In these countries,
pricing negoaons with governmental authories can take a significant amount of me aer receipt of markeng approval for a product. In addion, there
can be considerable pressure by governments and other stakeholders on prices and reimbursement levels, including as part of cost containment measures.
Polical, economic and regulatory developments may further complicate pricing negoaons, and pricing negoaons may connue aer reimbursement has
been obtained. Reference pricing used by various EU Member States and parallel distribuon, or arbitrage between low-priced and high-priced EU Member
States,  can  further  reduce  prices,  and  in  certain  instances  render  commercializaon  in  certain  markets  infeasible  or  disadvantageous  from  a  financial
perspecve. In some countries, we or our collaborators may be required to conduct a clinical trial or other studies that compare the cost-effecveness of our
product and/or our product candidates to other available products in order to obtain or maintain reimbursement or pricing approval. Publicaon of discounts
by third party payors or government authories may lead to further pressure on the prices or reimbursement levels. If reimbursement of our products is
unavailable or limited in scope or amount, or if pricing is set at unsasfactory levels, the commercial launch of our product and/or product candidates could
be delayed, possibly for lengthy periods of me, we or our collaborators may not launch at all in a parcular country, we may not be able to recoup our
investment in one or more product candidates, and there could be a material adverse effect on our business.

Our reporng and payment obligaons under the Medicaid Drug Rebate Program and other governmental drug pricing programs are complex and may
involve subjecve decisions. Any failure to properly comply with those obligaons could subject us to penales and sancons.

As a condion of reimbursement by various federal and state health insurance programs, we are required to calculate and report certain pricing informaon
to federal and state agencies. The regulaons governing the calculaons, price reporng and payment obligaons are complex and subject to interpretaon
by various government and regulatory agencies, as well as the courts. Reasonable assumpons have been made where there is lack of regulaons or clear
guidance and such assumpons involve subjecve decisions and esmates. We are required to report any revisions to our calculaon, price reporng and
payment obligaons previously reported or paid. Such revisions could affect our liability to federal and state payors and also adversely impact our reported
financial results of operaons in the period of such restatement. Further, a number of states have either implemented or are considering implementaon of
drug price transparency legislaon that may prevent or limit our ability to take price increases at certain rates or frequencies. Requirements under such laws
include advance noce of planned price increases, reporng price increase amounts and factors considered in taking such increases, wholesale acquision
cost informaon disclosure to prescribers, purchasers, and state agencies, and new product noce and reporng. Such legislaon could limit the price or
payment  for  certain  drugs,  and  a  number  of  states  are  authorized  to  impose  civil  monetary  penales  or  pursue  other  enforcement  mechanisms  against
manufacturers  for  the  unmely,  inaccurate,  or  incomplete  reporng  of  drug  pricing  informaon  or  for  otherwise  failing  to  comply  with  drug  price
transparency

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requirements. If we are found to have violated state law requirements, we may become subject to significant penales or other enforcement mechanisms,
which could have a material adverse effect on our business.

Uncertainty  exists  as  new  laws,  regulaons,  judicial  decisions,  or  new  interpretaons  of  exisng  laws,  or  regulaons  related  to  our  calculaons,  price
reporng  or  payments  obligaons  increases  the  chances  of  a  legal  challenge,  restatement  or  invesgaon.  If  we  become  subject  to  invesgaons,
restatements, or other inquiries concerning our compliance with price reporng laws and regulaons, we could be required to pay or be subject to addional
reimbursements, penales, sancons or fines, which could have a material adverse effect on our business, financial condion and results of operaons. In
addion, it is possible that future healthcare reform measures could be adopted, which could result in changes to how we calculate or report certain pricing
informaon  to  federal  and  state  agencies,  or  increased  pressure  on  pricing  and  reimbursement  of  our  products  and  thus  have  an  adverse  impact  on  our
financial posion or business operaons.

Further,  state  Medicaid  programs  may  be  slow  to  invoice  pharmaceucal  companies  for  calculated  rebates  resulng  in  a  lag  between  the  me  a  sale  is
recorded and the me the rebate is paid. This results in us having to carry a liability on our consolidated balance sheets for the esmate of rebate claims
expected for Medicaid paents. If actual claims are higher than current esmates, our financial posion and results of operaons could be adversely affected.

In addion to retroacve rebates and the potenal for 340B Program refunds, if we are found to have knowingly submied any false price informaon related
to the Medicaid Drug Rebate Program to CMS, we may be liable for civil monetary penales. Such failure could also be grounds for CMS to terminate our
Medicaid drug rebate agreement, pursuant to which we parcipate in the Medicaid program. In the event that CMS terminates our rebate agreement, federal
payments may not be available under government programs, including Medicaid or Medicare Part B, for our covered outpaent drugs.

Addionally, if we overcharge the government in connecon with the Federal Supply Schedule pricing program or Tricare Retail Pharmacy Program, whether
due to a misstated Federal Ceiling Price or otherwise, we are required to refund the difference to the government. Failure to make necessary disclosures
and/or  to  idenfy  contract  overcharges  can  result  in  allegaons  against  us  under  the  FDCA  and  other  laws  and  regulaons.  Unexpected  refunds  to  the
government,  and  responding  to  a  government  invesgaon  or  enforcement  acon,  would  be  expensive  and  me-consuming,  and  could  have  a  material
adverse effect on our business, financial condion, results of operaons and growth prospects.

Our  collaborators  are  also  subject  to  similar  requirements  outside  of  the  U.S.  and  thus  the  aendant  risks  and  uncertaines.  If  our  collaborators  suffer
material and adverse effects from such risks and uncertaines, our rights and benefits for our licensed products could be negavely impacted, which could
have a material and adverse impact on our revenues.

With  the  passage  of  the  CREATES  Act,  we  are  exposed  to  possible  ligaon  and  damages  by  competors  who  may  claim  that  we  are  not  providing
sufficient  quanes  of  our  approved  products  on  commercially  reasonable,  market-based  terms  for  tesng  in  support  of  their  abbreviated  new  drug
applicaons, or ANDAs, 505(b)(2) NDAs and biosimilar product applicaons.

In December 2019, former President Trump signed legislaon intended to facilitate the development of generic and biosimilar products. The bill, previously
known as the CREATES Act, authorizes sponsors of ANDAs, 505(b)(2) NDAs or biosimilar product applicaons to file lawsuits against companies holding NDAs
or BLAs that decline to provide sufficient quanes of an approved reference drug or biological product on commercially reasonable, market-based terms.
Drug  or  biological  products  on  FDA’s  drug  shortage  list  are  exempt  from  these  new  provisions  unless  the  product  has  been  on  the  list  for  more  than  six
connuous months or the FDA determines that the supply of the product will help alleviate or prevent a shortage.

To bring an acon under the statute, the developer of a product candidate that seeks to develop the product and seek approval under an ANDA, 505(b)(2)
NDA, or biosimilar product applicaon must take certain steps to request the reference product from the reference product manufacturer, which, in the case
of products covered by a REMS with elements to assure safe use, include obtaining authorizaon from the FDA for the acquision of the reference product. If
the  reference  product  manufacturer  does  not  provide  the  reference  product  and  the  ANDA,  505(b)(2)  NDA,  or  biosimilar  product  sponsor  does  bring  an
acon  for  failure  to  provide  a  reference  product,  there  are  certain  affirmave  defenses  available  to  the  reference  product  manufacturer,  which  must  be
shown by a preponderance of evidence, including that the NDA or BLA holder sells the reference product through agents, distributors, or wholesalers and has
placed no restricons, explicit or implicit, on selling the reference product to ANDA, 505(b)(2) or biosimilar sponsors. If the sponsor prevails in ligaon, it is
entled  to  a  court  order  direcng  the  reference  product  manufacturer  to  provide,  without  delay,  sufficient  quanes  of  the  applicable  product  on
commercially reasonable, market-based terms, plus reasonable aorney fees and costs.

Addionally, the new statutory provisions authorize a federal court to award the product developer an amount “sufficient to deter” the reference product
manufacturer  from  refusing  to  provide  sufficient  product  quanes  on  commercially  reasonable,  market-based  terms,  up  to  a  certain  maximum  amount
based on revenue earned while in noncompliance, if the court finds, by a preponderance of the evidence, that the reference product manufacturer did not
have a legimate business jusficaon to delay providing the product or failed to comply with the court’s order. For the purposes of the statute, the

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term “commercially reasonable, market-based terms” is defined as (1) the nondiscriminatory price at or below the most recent wholesale acquision cost for
the product, (2) a delivery schedule that meets the statutorily defined metable, and (3) no addional condions on the sale.

Although we intend to comply fully with the terms of these statutory provisions, we are sll exposed to potenal ligaon and damages by competors who
may claim that we are not providing sufficient quanes of our approved products on commercially reasonable, market-based terms for tesng in support of
ANDAs, 505(b)(2) NDA applicaons or biosimilar product applicaons. Such ligaon would subject us to addional ligaon costs, damages and reputaonal
harm, which could lead to lower revenues. The CREATES Act may facilitate future compeon with Auryxia and any of our product candidates, if approved,
which could impact our ability to maximize product revenue.

If we fail to comply with environmental, health and safety laws and regulaons, we could become subject to fines or penales or incur costs that could
harm our business.

We are subject to numerous environmental, health and safety laws and regulaons, including those governing laboratory procedures and the handling, use,
storage,  treatment  and  disposal  of  hazardous  materials  and  wastes.  Our  operaons  involve  the  use  of  hazardous  and  flammable  materials,  including
chemicals and biological materials. Our operaons also produce hazardous waste products. We generally contract with third pares for the use and disposal
of these materials and wastes. We cannot eliminate the risk of contaminaon or injury from these materials. In the event of contaminaon or injury resulng
from the use of hazardous materials by our employees, contractors or consultants, we could be held liable for any resulng damages, and any liability could
exceed  our  resources.  We  also  could  incur  significant  costs  associated  with  civil  or  criminal  fines  and  penales  for  failure  to  comply  with  such  laws  and
regulaons.

Although we maintain workers’ compensaon insurance to cover us for costs and expenses we may incur due to injuries to our employees resulng from the
use of hazardous materials, this insurance may not provide adequate coverage against potenal liabilies. We do not maintain insurance for environmental
liability or toxic tort claims that may be asserted against us in connecon with our storage or disposal of biological, hazardous or radioacve materials.

In addion, we may incur substanal costs in order to comply with current or future environmental, health and safety laws and regulaons. These current or
future  laws  and  regulaons  may  impair  our  research,  development  or  producon  efforts.  Our  failure  to  comply  with  these  laws  and  regulaons  also  may
result in substanal fines, penales or other sancons.

Risks Related to our Reliance on Third Pares

We  depend  on  collaboraons  with  third  pares  for  the  development  and  commercializaon  of  Auryxia,  Riona,  Vafseo  and  vadadustat  and  if  these
collaboraons are not successful or if our collaborators terminate their agreements with us, we may not be able to capitalize on the market potenal of
Auryxia, Riona, Vafseo and vadadustat, and our business could be materially harmed.

We  sublicensed  the  rights  to  commercialize  Riona  to  JT  and  Torii  in  Japan.  We  also  entered  into  a  collaboraon  agreement  with  MTPC  to  develop  and
commercialize vadadustat in Japan and certain other Asian countries. In addion, we entered into the Vifor Agreement pursuant to which we granted CSL
Vifor an exclusive license to sell vadadustat to the Supply Group in the U.S. We also granted to Averoa an exclusive license to develop and commercialize ferric
citrate in the EEA, Turkey, Switzerland and the United Kingdom. Furthermore, in May 2023, we entered into a license agreement with Medice, pursuant to
which we granted Medice an exclusive license to develop and commercialize vadadustat for the treatment of anemia in paents with chronic kidney disease
in the Medice Territory. We may form or seek other strategic alliances, joint ventures, or collaboraons, or enter into addional licensing arrangements with
third pares that we believe will complement or augment our and our partners' commercializaon efforts with respect to Auryxia, Riona, Vafseo and our
partners'  development  and,  if  approved,  commercializaon  efforts  with  respect  to  vadadustat  and  any  other  product  candidates.  We  may  not  be  able  to
maintain our collaboraons for development and commercializaon. For example, on May 13, 2022, Otsuka Pharmaceucal Co. Ltd., or Otsuka,  elected  to
terminate our collaboraon agreements with them, and we subsequently negoated a Terminaon and Selement Agreement with Otsuka. This terminaon
by Otsuka may have delayed the launch of vadadustat in Europe or other territories previously licensed to Otsuka or adversely affect how we are perceived in
scienfic and financial communies. For example, in August 2023, Medice informed us that their launch of Vafseo in certain countries in the Medice Territory
was going to be later than previously ancipated due to the acvies required to enable the launch. If we are unable to maintain our collaboraons, we may
not be able to capitalize on the market potenal of our products or product candidates, and our business could be materially harmed.

In addion, our current and any future collaboraons may not be successful due to a number of important factors, including the following:

•

collaborators may have significant discreon in determining the efforts and resources that they will apply to these collaboraons;

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collaboraons may be terminated in accordance with the terms of the collaboraon agreements and, if terminated, may make it difficult for us to
aract new collaborators or adversely affect how we are perceived in scienfic and financial communies, and may result in a need for addional
capital  and  expansion  of  our  internal  capabilies  to  pursue  further  development  or  commercializaon  of  the  applicable  products  and  product
candidates;

if  permied  by  the  terms  of  the  collaboraon  agreements,  collaborators  may  elect  not  to  connue  or  renew  development  or  commercializaon
programs  based  on  clinical  trial  results,  changes  in  their  strategic  focus,  availability  of  funding  or  other  external  factors  such  as  a  business
combinaon that diverts resources or creates compeng priories;

if  permied  by  the  terms  of  the  collaboraon  agreements,  collaborators  may  delay  clinical  trials,  provide  insufficient  funding  for  a  clinical  trial
program, stop a clinical trial, abandon a product candidate, repeat or conduct new clinical trials or require a new formulaon of a product candidate
for clinical tesng;

a collaborator with markeng and distribuon rights to our products may not commit sufficient resources to their markeng and distribuon;

if permied by the terms of the collaboraon agreements, we and our collaborator may have a difference of opinion regarding the development or
commercializaon strategy for a parcular product or product candidate, and our collaborator may have ulmate decision making authority;

disputes  may  arise  between  a  collaborator  and  us  that  cause  the  delay  or  terminaon  of  acvies  related  to  research,  development,  supply  or
commercializaon  of  Auryxia,  Riona,  Vafseo  or  vadadustat  and  any  other  product  candidate,  or  that  result  in  costly  ligaon  or  arbitraon  that
diverts management aenon and resources;

collaboraons may not lead to development or commercializaon of products and product candidates, if approved, in the most efficient manner or
at all;

inefficiencies  or  structural  changes  in  internal  operaons  or  processes  of  our  collaborators  may  lead  to  increased  expenses  associated  with
commercializing  a  product,  including  manufacturing  costs,  rebates,  returns  and  other  adjustments  which  would  negavely  impact  net  product
revenue;

a significant change in the senior management team, a change in the financial condion or a change in the business operaons, including a change
in  control  or  internal  corporate  restructuring,  of  any  of  our  collaborators,  could  result  in  delayed  melines,  re-priorizaon  of  our  programs,
decreasing resources or funding allocated to support our programs, or terminaon of the collaboraons; and

•

collaborators may not comply with all applicable regulatory and legal requirements.

If  any  of  these  events  occur,  the  market  potenal  of  Auryxia,  Riona,  Vafseo  or  vadadustat,  if  and  where  approved,  and  any  other  products  or  product
candidates, could be reduced, and our business could be materially harmed. Collaboraons may also divert resources, including the aenon of management
and other employees, from other parts of our business, which could have an adverse effect on other parts of our business, and we cannot be certain that the
benefits of the collaboraon will outweigh the potenal risks.

We may seek to establish addional collaboraons and, if we are not able to establish them on commercially reasonable terms, or at all, we may have to
alter our development and commercializaon plans.

We may decide to enter into addional collaboraons for the development and commercializaon of Auryxia or our product candidates, including vadadustat,
both within and outside of the U.S. For example, in May 2023, we entered into the license agreement with Medice, pursuant to which we granted Medice an
exclusive license to develop and commercialize vadadustat for the treatment of anemia in paents with chronic kidney disease in the Medice Territory. Any of
these relaonships may require us to incur non-recurring and other charges, increase our near and long-term expenditures, issue securies that dilute our
exisng stockholders, divert management’s aenon, or disrupt our business.

We may not be successful in entering into addional collaboraons as a result of many factors, including the following:

•

•

•

•

•

•

•

compeon in seeking appropriate collaborators;

a reduced number of potenal collaborators due to recent business combinaons in the pharmaceucal industry;

an inability to negoate collaboraons on acceptable terms, on a mely basis or at all;

any internaonal rules, regulaons, guidance, laws, risks or uncertaines with respect to potenal partners outside of the U.S.;

a potenal collaborator’s evaluaon of Auryxia, vadadustat or any other product or product candidate may differ substanally from ours;

a potenal collaborator’s evaluaon of our financial stability and resources;

a potenal collaborator’s resources and experse; and

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•

restricons due to an exisng collaboraon agreement.

If we are unable to enter into addional collaboraons in a mely manner, or at all, we may have to delay or curtail the commercializaon of Auryxia or the
development  and  potenal  commercializaon  of  any  of  our  product  candidates,  including  vadadustat,  if  approved,  reduce  or  delay  our  development
programs, or increase our expenditures and undertake addional development or commercializaon acvies at our own expense. For example, following
the terminaon of our collaboraon agreements with Otsuka in 2022, we incurred addional expenses in connecon with the development of vadadustat in
Europe and other countries. If we elect to increase our expenditures to fund development or commercializaon acvies on our own, we may need to obtain
addional capital, which may not be available to us on acceptable terms or at all. If we do not have sufficient funds, we may not be able to further develop or
commercialize Auryxia or our other product candidates, including vadadustat, if approved.

Even if we enter into addional collaboraon agreements and strategic partnerships or license our intellectual property, we may not be able to maintain them
or they may be unsuccessful, which could delay our melines or otherwise adversely affect our business.

Royales from commercial sales of vadadustat under our MTPC Agreement will likely fluctuate and will impact our rights to receive future payments under
our Royalty Agreement with HCR.

Pursuant to the Royalty Agreement with HCR, we sold to HCR our right to receive the Royalty Interest Payments payable to us under the MTPC Agreement,
subject to the Annual Cap and the Aggregate Cap. Aer HCR receives Royalty Interest Payments equal to the Annual Cap in a given calendar year, we will
receive 85% of the Royalty Interest Payments for the remainder of that year. Aer HCR receives Royalty Interest Payments equal to the Aggregate Cap, or we
pay the Aggregate Cap to HCR (net of the Royalty Interest Payments already received by HCR), the Royalty Interest Payments will revert back to us, and HCR
would have no further right to any Royalty Interest Payments. We received $44.8 million from HCR (net of certain transacon expenses) under the Royalty
Agreement, and we were eligible to receive up to an addional $5.0 million in each year from 2021 through 2023 under the Royalty Agreement if specified
sales milestones were achieved for vadadustat in the territory covered by the MTPC Agreement, subject to the sasfacon of certain customary condions,
and we did not achieve such milestones.

The royalty revenues under the MTPC Agreement may fluctuate considerably because they depend upon, among other things, the rate of growth of sales of
vadadustat in the territory covered by the MTPC Agreement. Negave fluctuaons in these royalty revenues could delay, diminish or eliminate our ability to
receive 85% of the Royalty Interest Payments aer the Annual Cap is achieved in a given calendar year, or our ability to receive 100% of the Royalty Interest
Payments aer the Aggregate Cap is achieved.

We rely upon third pares to conduct all aspects of our product manufacturing and commercial distribuon, and in many instances only have a single
supplier  or  distributor,  and  the  loss  of  these  manufacturers  or  distributors,  their  failure  to  supply  us  on  a  mely  basis,  or  at  all,  or  their  failure  to
successfully  carry  out  their  contractual  dues  or  comply  with  regulatory  requirements,  cGMP  requirements  or  guidance  could  cause  delays  in  or
disrupons to our supply chain and substanally harm our business.

We do not have any manufacturing facilies and do not expect to independently manufacture any products or product candidates. We currently rely, and
expect to connue to rely, on third party manufacturers to produce all of our commercial, clinical and preclinical supply. We also ulize third pares for the
commercial distribuon of Auryxia, including wholesale distributors and certain specialty pharmacy providers. Our reliance on third party manufacturers, who
have control over the manufacturing process, increases the risk that we will not have or be able to maintain or distribute sufficient quanes of Auryxia and
vadadustat or the ability to obtain such quanes at an acceptable cost or quality, which could delay, prevent or impair our and our partners' development or
commercializaon efforts.

We currently rely on a single source supplier for each of Auryxia drug substance and drug product and vadadustat drug substance and drug product, and
alternate sources of supply may not be readily available. We have also engaged Cardinal Health, Inc. as the exclusive third-party logiscs distribuon agent for
commercial sales of Auryxia. If any of the following occurs, we may not have sufficient quanes of Auryxia and/or vadadustat to support our clinical trials,
development, commercializaon, or obtaining and maintaining markeng approvals, which could materially and adversely impact our business and results of
operaons:

• we are unsuccessful in maintaining our current supply arrangements for commercial quanes of Auryxia and vadadustat;
• we are unsuccessful in validang new sites;

•

our commercial supply arrangements for Auryxia or vadadustat are terminated;

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•

•

•

any of our third party manufacturers are unable to fulfill the terms of their agreements with us due to technical issues, natural disasters or other
reasons, including with respect to quality and quanty, or are unable or unwilling to connue to manufacture on the manufacturing lines included in
our regulatory filings;

any of our third party manufacturers breach our supply agreements, do not comply with quality or regulatory requirements and guidance, including
cGMP or are subject to regulatory review or ceases their operaons for any reason; or

any of our third party distributors fail to perform or encounter any damage or other disrupon at their facilies.

If we, or any of our third party manufacturers or distributors cannot or do not perform as agreed or expected, or any of our customers were to experience
further shutdowns, delays or other business disrupons, including as a result of catastrophic events, including pandemics, terrorist aacks, wars or other
armed conflicts, geopolical tensions or natural disasters, if they misappropriate our proprietary informaon, if they terminate their engagements with us, if
we terminate our engagements with them, or if there is a significant disagreement, we may be forced to manufacture or distribute the materials ourselves,
for which we currently do not have the capabilies or resources, or enter into agreements with other third party manufacturers or distributors, which we may
not be able to do in a mely manner or on favorable or reasonable terms, if at all. If any of these events occur, especially with respect to one of our sole
source suppliers, we may not have sufficient quanes of product for the commercializaon of Auryxia and/or vadadustat, if approved, or may experience
delays in the development of our products or product candidates, which could materially and adversely impact our business and results of operaon. For
example,  one  of  our  manufacturers  has  nofied  us  that  it  will  be  disconnuing  operaons  at  one  site  at  a  future  date  and  then  we  will  only  be  able  to
manufacture at their other site. In some cases, there may be a limited number of qualified replacement manufacturers, or the technical skills or equipment
required to manufacture a product or product candidate may be unique or proprietary to the original manufacturer and we may have difficulty transferring
such  skills  or  technology  to  another  third  party,  or  a  feasible  alternave  may  not  exist.  These  factors  would  increase  our  reliance  on  our  current
manufacturers or require us to obtain necessary regulatory approvals and licenses in order to have another third party manufacture Auryxia or vadadustat. If
we are required to change manufacturers for any reason, we will be required to verify that the new manufacturer maintains facilies and procedures that
comply with quality standards and with all applicable regulaons and guidelines. The delays and costs associated with the qualificaon of a new manufacturer
and  validaon  of  manufacturing  processes  would  negavely  affect  our  ability  to  supply  clinical  trials,  obtain  and  maintain  markeng  approval,  or
commercialize or sasfy paent demand for Auryxia and vadadustat, where approved, in a mely manner, within budget, or at all.

In addion, the cost of obtaining Auryxia and vadadustat is subject to adjustment based on our third party manufacturers’ costs of obtaining raw materials
and producing the product. We have limited control over the producon costs of Auryxia and vadadustat, including the costs of raw materials, and have seen
increases  in  the  producon  costs  of  Auryxia  and  vadadustat,  and  any  significant  increase  in  the  cost  of  obtaining  our  products  could  materially  adversely
affect our revenue for Auryxia and vadadustat, if approved.

Moreover, issues that may arise in any scale-up and technology transfer and connued commercial scale manufacture of our products may lead to significant
delays in our development, markeng approval and commercial melines for new products or affect commercial supply of Auryxia and negavely impact our
financial performance. For example, a producon-related issue resulted in an interrupon in the supply of Auryxia in the third and fourth quarters of 2016.
This supply interrupon negavely impacted our revenues in 2016. This supply interrupon was resolved, and we have taken and connue to take acons
designed to prevent future interrupons in the supply of Auryxia. However, we recently experienced issues in manufacturing Auryxia, and if we connue to
experience manufacturing issues, or incur addional costs, or our acons to prevent future interrupons are not successful, we may experience addional
supply  issues.  In  addion,  before  we  can  manufacture  product  at  a  new  site,  we  must  validate  the  process  at  that  site.  If  the  process  validaon  is
unsuccessful, or takes longer than we ancipate, we may have to expend addional resources and could experience a supply interrupon. Any future supply
interrupons, whether quality or quanty based, for Auryxia or vadadustat, if and where approved, would negavely and materially impact our reputaon
and financial condion.

There are a limited number of manufacturers that are capable of manufacturing Auryxia and vadadustat for us and complying with cGMP regulaons and
guidance and other stringent regulatory requirements and guidance enforced by the FDA, EMA, PMDA and other regulatory authories. These requirements
include,  among  other  things,  quality  control,  quality  assurance  and  the  maintenance  of  records  and  documentaon,  which  occur  in  addion  to  our  own
quality assurance releases. The facilies and processes used by our third party manufacturers to manufacture Auryxia may be inspected by the FDA and other
regulatory authories at any me, and the facilies and processes used by our third party manufacturers to manufacture vadadustat will be inspected by the
FDA,  the  EMA  and  other  regulatory  authories  prior  to  or  aer  we  submit  our  markeng  applicaons.  Although  we  have  general  visibility  into  the
manufacturing processes of our third party manufacturers, we do not ulmately control such manufacturing processes of, and have lile control over, our
third  party  manufacturers,  including,  without  limitaon,  their  compliance  with  cGMP  requirements  and  guidance  for  the  manufacture  of  certain  starng
materials,

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drug  substance  and  finished  drug  product.  Similarly,  although  we  review  final  producon,  we  have  lile  control  over  the  ability  of  our  third  party
manufacturers to maintain adequate quality control, quality assurance and qualified personnel. Our third party manufacturers may experience problems with
their  manufacturing  and  distribuon  operaons  and  processes,  including,  for  example,  quality  issues,  such  as  product  specificaon  and  stability  failures,
procedural deviaons, improper equipment installaon or operaon, ulity failures, contaminaon, natural disasters and public health epidemics. We may
also  encounter  difficules  relang  to  our  own  quality  processes  and  procedures,  including  regulatory  compliance,  lot  release,  quality  control  and  quality
assurance,  as  well  as  shortages  of  qualified  personnel.  If  our  third  party  manufacturers  cannot  successfully  manufacture  material  that  conforms  to  our
specificaons  and  regulatory  requirements  and  guidance,  or  if  we  or  our  third  party  manufacturers  experience  manufacturing,  operaons  and/or  quality
issues,  including  an  inability  or  unwillingness  to  connue  manufacturing  our  products  at  all,  in  accordance  with  agreed-upon  processes  or  on  currently
validated manufacturing lines, we may not be able to supply paent demand or maintain markeng approval for Auryxia, secure and maintain markeng
approval for vadadustat, and we might be required to expend addional resources to obtain material from other manufacturers. If any of these events occur,
our reputaon and financial condion would be negavely and materially impacted. In addion, during the year ended December 31, 2022, we had higher
write-downs to inventory reserves related to Auryxia drug substance that will not be forward processed into drug product. If we have addional write-downs
to inventory reserves in the future, it could negavely impact our ability to supply Auryxia, and our financial condion could be harmed.

If the FDA or other regulatory authories do not approve the facilies being used to manufacture vadadustat, or if the EMA or other regulatory authories
withdraws any approval of the facilies being used to manufacture Auryxia and/or Vafseo, we may need to find alternave manufacturing facilies, which
would significantly impact our ability to connue commercializing Auryxia or Vafseo in Japan, or to commercialize Vafseo in Europe and other countries, or to
develop, obtain markeng approval for or market vadadustat or our other product candidates, if approved.

Moreover,  our  failure  or  the  failure  of  our  third  party  manufacturers  or  distributors  to  comply  with  applicable  regulaons  or  guidance,  or  our  failure  to
oversee  or  facilitate  such  compliance,  could  result  in  sancons  being  imposed  on  us  or  our  third  party  manufacturers  or  distributors,  including,  where
applicable,  clinical  holds,  fines,  injuncons,  civil  penales,  delays  in,  suspension  of  or  withdrawal  of  approvals,  license  revocaon,  seizures  or  recalls  of
Auryxia  or  Vafseo  in  Japan,  operang  restricons,  receipt  of  a  Form  483  or  warning  leer,  or  criminal  prosecuons,  any  of  which  could  significantly  and
adversely affect the supply of Auryxia or vadadustat. For example, we previously conducted three limited, voluntary recalls of Auryxia. These and any other
recalls or any supply, quality or manufacturing issues in the future and any related write-downs of inventory or other consequences could result in significant
negave consequences, including reputaonal harm, loss of customer confidence, and a negave impact on our financials, any of which could have a material
adverse  effect  on  our  business  and  results  of  operaons,  and  may  impact  our  ability  to  supply  Auryxia,  Vafseo  in  Japan,  Europe  or  other  countries  or
vadadustat, if approved in other countries, for clinical and commercial use. Also, if our starng materials, drug substance or drug product are damaged or lost
while in our or our third party manufacturers’ or distributors' control, it may adversely impact our ability to supply Auryxia or vadadustat, and we may incur
significant financial harm.

In addion, Auryxia, Vafseo and vadadustat may compete with other products and product candidates for access to third party manufacturing facilies. A
third party manufacturer or distributor may also encounter delays or operaonal issues brought on by sudden internal resource constraints, labor disputes,
shiing priories or shiing regulatory protocols. Certain of these third party manufacturing facilies may be contractually prohibited from manufacturing
Auryxia, Vafseo or vadadustat due to exclusivity provisions in agreements with our competors. Any of the foregoing could negavely impact our third party
manufacturers' or distributors' ability to meet our demand, which could adversely impact our ability to supply Auryxia, Vafseo or vadadustat, and we may
incur significant financial harm.

Our current and ancipated future dependence on third pares for the manufacture and distribuon of Auryxia, Vafseo and vadadustat may adversely affect
our and our partners' ability to commercialize Auryxia, Vafseo and vadadustat, where approved, on a mely and compeve basis and may reduce any future
profit margins.

We rely upon third pares to conduct our clinical trials and certain of our preclinical studies. If they do not successfully carry out their contractual dues,
comply with regulatory requirements or meet expected deadlines, we may not be able to obtain or maintain markeng approval for Auryxia, vadadustat
or any of our product candidates, and our business could be substanally harmed.

We do not have the ability to independently conduct certain preclinical studies and clinical trials. We are currently relying, and expect to connue to rely,
upon third pares, such as CROs, clinical data management organizaons, medical instuons and clinical invesgators, to conduct our current and future
preclinical  studies  and  clinical  trials.  The  third  pares  upon  whom  we  rely  may  fail  to  perform  effecvely,  or  terminate  their  engagement  with  us,  for  a
number of reasons, including the following:

•
•

if they experience staffing difficules;

if we fail to communicate effecvely or provide the appropriate level of oversight;

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•

•

if they undergo changes in priories or corporate structure including as a result of a merger or acquision or other transacon, or become financially
distressed; or

if they form relaonships with other enes, some of which may be our competors.

If the third pares upon whom we rely to conduct our trials fail to adhere to clinical trial protocols or to regulatory requirements, the quanty, quality or
accuracy of the data obtained by the third pares may be compromised. We are exposed to risk of fraud or other misconduct by such third pares.

Any of these events could cause our preclinical studies and clinical trials, including post-approval clinical trials, to be extended, delayed, suspended, required
to be repeated or terminated, or we may receive untled warning leers or be the subject of an enforcement acon, which could result in our failing to
obtain and maintain markeng approval of vadadustat or any other product candidates on a mely basis, or at all, or fail to maintain markeng approval of
Auryxia,  or  any  other  products,  any  of  which  would  adversely  affect  our  business  operaons.  In  addion,  if  the  third  pares  upon  whom  we  rely  fail  to
perform effecvely or terminate their engagement with us, we may need to enter into alternave arrangements, which could delay, perhaps significantly, the
development and commercializaon of vadadustat, if approved, or any other product candidates.

Even  though  we  do  not  directly  control  the  third  pares  upon  whom  we  rely  to  conduct  our  preclinical  studies  and  clinical  trials  and  therefore  cannot
guarantee the sasfactory and mely performance of their obligaons to us, we are nevertheless responsible for ensuring that each of our clinical trials and
preclinical  studies  is  conducted  in  accordance  with  the  applicable  protocol,  legal  and  regulatory  requirements,  including  GxP  requirements,  and  scienfic
standards,  and  our  reliance  on  these  third  pares,  including  CROs,  will  not  relieve  us  of  our  regulatory  responsibilies.  If  we  or  any  of  our  CROs,  their
subcontractors, or clinical or preclinical trial sites fail to comply with applicable GxP requirements, the clinical data generated in our trials may be deemed
unreliable  or  insufficient,  our  clinical  trials  could  be  put  on  hold,  and/or  the  FDA,  the  EMA  or  other  regulatory  authories  may  require  us  to  perform
addional clinical trials before approving our markeng applicaons. In addion, our clinical and preclinical trials must be conducted with drug product that
meets  certain  specificaons  and  is  manufactured  under  applicable  cGMP  regulaons.  These  requirements  include,  among  other  things,  quality  control,
quality assurance, and the sasfactory maintenance of records and documentaon.

We also rely upon third pares to store and distribute drug product for our clinical trials. For example, we use third pares to store product at various sites in
the U.S. to distribute to our clinical trial sites. Any performance failure on the part of our storage or distributor partners could delay clinical development,
markeng approval or commercializaon, resulng in addional costs and depriving us of potenal product revenue.

If the licensor of certain intellectual property relang to Auryxia terminates, modifies or threatens to terminate exisng contracts or relaonships with us,
our business may be materially harmed.

We do not own all of the rights to our product, Auryxia. We have licensed and sublicensed certain rights, patent and otherwise, to Auryxia from a third party,
Panion,  who  in  turn  licenses  certain  rights  to  Auryxia  from  one  of  the  inventors  of  Auryxia.  The  license  agreement  with  Panion,  or  the  Panion  License
Agreement, requires us to meet development milestones and imposes development and commercializaon due diligence requirements on us. In addion,
under  the  Panion  License  Agreement,  we  must  pay  royales  based  on  a  mid-single  digit  percentage  of  net  sales  of  product  resulng  from  the  licensed
technologies, including Auryxia, and pay the patent filing, prosecuon and maintenance costs related to the license. If we do not meet our obligaons in a
mely manner, or if we otherwise breach the terms of the Panion License Agreement, Panion could terminate the agreement, and we would lose the rights to
Auryxia. For example, following announcement of the Merger, Panion nofied us in wring that Panion would terminate the Panion License Agreement on
November 21, 2018 if we did not cure the breach alleged by Panion, specifically, that we failed to use commercially reasonable best efforts to commercialize
Auryxia outside the U.S. We disagreed with Panion’s claims, and the pares entered discussions to resolve this dispute. On October 24, 2018, prior to the
consummaon of the Merger, we and Panion entered into a leer agreement, or the Panion Leer Agreement, pursuant to which Panion agreed to rescind
any and all prior terminaon threats or noces relang to the Panion License Agreement and waived its rights to terminate the license agreement based on
any breach by us of our obligaon to use commercially reasonable efforts to commercialize Auryxia outside the U.S. unl the pares executed an amendment
to the Panion License Agreement in accordance with the terms of the Panion Leer Agreement, following consummaon of the Merger. On April 17, 2019, we
and  Panion  entered  into  an  amendment  and  restatement  of  the  Panion  License  Agreement,  or  the  Panion  Amended  License  Agreement,  which  reflects
certain  revisions  consistent  with  the  terms  of  the  Panion  Leer  Agreement.  See  Note  10,  Commitments  and  Conngencies,  to  our  consolidated  financial
statements  in  Part  II,  Item  8.  Financial  Statements  of  this  Form  10-K  for  addional  informaon  regarding  the  Panion  Amended  License  Agreement.  Even
though we entered into the Panion Amended License Agreement, there are no assurances that Panion will not allege other breaches of the Panion Amended
License Agreement or otherwise aempt to terminate the Panion Amended License Agreement in the future. In addion, if Panion breaches its agreement
with the inventor from whom it licenses rights to Auryxia, Panion could lose its license, which could impair or delay our ability to develop and commercialize
Auryxia.

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From me to me, we may have disagreements with Panion, or Panion may have disagreements with the inventor from whom it licenses rights to Auryxia,
regarding the terms of the agreements or ownership of proprietary rights, which could impact the commercializaon of Auryxia, could require or result in
ligaon or arbitraon, which would be me-consuming and expensive, could lead to the terminaon of the Panion Amended License Agreement, or force us
to negoate a revised or new license agreement on terms less favorable than the original. In addion, in the event that the owners and/or licensors of the
rights  we  license  were  to  enter  into  bankruptcy  or  similar  proceedings,  we  could  potenally  lose  our  rights  to  Auryxia  or  our  rights  could  otherwise  be
adversely affected, which could prevent us from connuing to commercialize Auryxia.

Risks Related to our Intellectual Property

If we are unable to adequately protect our intellectual property, third pares may be able to use our intellectual property, which could adversely affect our
ability to compete in the market.

Our commercial success will depend in part on our ability, and the ability of our licensors, to obtain and maintain patent protecon on our drug product and
technologies, and to successfully defend these patents against third party challenges. We seek to protect our proprietary products and technology by filing
patent applicaons in the U.S. and certain foreign jurisdicons. The process for obtaining patent protecon is expensive and me consuming, and we may not
be able to file and prosecute all necessary or desirable patent applicaons in a cost effecve or mely manner. In addion, we may fail to idenfy patentable
subject maer early enough to obtain patent protecon. Further, license agreements with third pares may not allow us to control the preparaon, filing and
prosecuon of patent applicaons, or the maintenance or enforcement of patents. Such third pares may decide not to enforce such patents or enforce such
patents without our involvement. Thus, these patent applicaons and patents may not, under these circumstances, be prosecuted or enforced in a manner
consistent with the best interests of the company.

Our pending patent applicaons may not issue as patents and may not issue in all countries in which we develop, manufacture or potenally sell our product
or in countries where others develop, manufacture and potenally sell products using our technologies. Moreover, our pending patent applicaons, if issued
as patents, may not provide addional protecon for our product.

The patent posions of pharmaceucal and biotechnology companies can be highly uncertain and involve complex legal and factual quesons. No consistent
policy  regarding  the  breadth  of  claims  allowed  in  pharmaceucal  and  biotechnology  patents  has  emerged  to  date.  Changes  in  the  patent  laws  or  the
interpretaon of the patent laws in the U.S. and other jurisdicons may diminish the value of our patents or narrow the scope of our patent protecon.
Accordingly, the patents we own or license may not be sufficiently broad to prevent others from praccing our technologies or from developing compeng
products. Furthermore, others may independently develop similar or alternave drug products or technologies or design around our patented drug product
and technologies which may have an adverse effect on our business. If our competors prepare and file patent applicaons in the U.S. that claim technology
also  claimed  by  us,  we  may  have  to  parcipate  in  interference  or  derivaon  proceedings  in  front  of  the  U.S.  Patent  and  Trademark  Office,  or  USPTO,  to
determine priority of invenon, which could result in substanal cost, even if the eventual outcome is favorable to us. Because of the extensive me required
for development, tesng and regulatory review of a potenal product, it is possible that any related patent may expire prior to, or remain in existence for only
a short period following, commercializaon, which may significantly diminish our ability to exclude others from commercializing products that are similar or
idencal to ours. The patents we own or license may be challenged or invalidated or may fail to provide us with any compeve advantage. Since we have
licensed  or  sublicensed  many  patents  from  third  pares,  we  may  not  be  able  to  enforce  such  licensed  patents  against  third  party  infringers  without  the
cooperaon of the patent owner and the licensor, which may not be forthcoming. In addion, we may not be successful or mely in obtaining any patents for
which we submit applicaons.

Generally, the first to file a patent applicaon is entled to the patent if all other requirements of patentability are met. However, prior to March 16, 2013, in
the U.S., the first to invent was entled to the patent. Since publicaons of discoveries in the scienfic literature oen lag behind the actual discoveries, and
patent applicaons in the U.S. and other jurisdicons are typically not published unl 18 months aer filing, or in some cases not at all, we cannot know with
certainty whether we were the first to make the invenons claimed in our patents or pending patent applicaons, or that we were the first to file for patent
protecon of such invenons. Moreover, the laws enacted by the Leahy-Smith America Invents Act of 2011, which reformed certain patent laws in the U.S.,
introduce procedures that permit competors to challenge our patents in the USPTO aer grant, including inter partes review and post grant review. Similar
laws exist outside of the U.S. The laws of the European Patent Convenon, for example, provide for post-grant opposion procedures that permit competors
to challenge, or oppose, our European patents administravely at the European Patent Office, or EPO.

We may become involved in addressing patentability objecons based on third party submission of references, or we may become involved in defending our
patent rights in opposions, derivaon proceedings, reexaminaon, inter partes review, post grant review, interference proceedings or other patent office
proceedings or ligaon, in the U.S. or elsewhere, challenging our patent rights or the patent rights of others. An adverse result in any such proceeding or
ligaon could reduce

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the scope of, or invalidate, our patent rights, allow third pares to commercialize our technology or products and compete directly with us, without payment
to us.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our owned and licensed patents may be challenged on
such a basis in the courts or patent offices in the U.S. and abroad. As a result of such challenges, we may lose exclusivity or freedom-to-operate or patent
claims  may  be  narrowed,  invalidated  or  held  unenforceable,  in  whole  or  in  part,  which  could  limit  our  ability  to  prevent  third  pares  from  using  or
commercializing similar or idencal products, or limit the duraon of the patent protecon for our products.

Periodic maintenance fees on any issued patent are due to be paid to the USPTO and foreign patent agencies in several stages over the lifeme of the patent.
The USPTO and governmental patent agencies in other jurisdicons also require compliance with a number of procedural, documentary, fee payment (such as
annuies) and other similar provisions during the patent applicaon process. While an inadvertent lapse in many cases can be cured by payment of a late fee
or by other means in accordance with the applicable rules, there are situaons in which non-compliance can result in abandonment or lapse of the patent or
patent applicaon, resulng in paral or complete loss of patent rights in the relevant jurisdicon. Non-compliance events that could result in abandonment
or lapse of a patent or patent applicaon include, but are not limited to, failure to respond to official acons within prescribed me limits, non-payment of
fees, and failure to properly legalize and submit formal documents. In such an event, our competors might be able to enter the market sooner than we
expect, which would have a material adverse effect on our business.

In addion, patents protecng our product candidate might expire before or shortly aer such candidate is commercialized. Thus, our patent porolio may
not provide sufficient rights to exclude others from commercializing products similar or idencal to ours.

We also rely on trade secrets and know-how to protect our intellectual property where we believe patent protecon is not appropriate or obtainable. Trade
secrets are difficult to protect. While we require our employees, licensees, collaborators and consultants to enter into confidenality agreements, this may
not  be  sufficient  to  adequately  protect  our  trade  secrets  or  other  proprietary  informaon.  In  addion,  in  some  cases,  we  share  certain  ownership  and
publicaon rights to data relang to some of our products and product candidates with research collaborators, licensees and other third pares. If we cannot
maintain the confidenality of this informaon, our ability to receive patent protecon or protect our trade secrets or other proprietary informaon will be at
risk.

We may not be able to protect our intellectual property rights throughout the world.

Filing, prosecung and defending patents on our products and product candidates in all countries throughout the world would be prohibively expensive.
Consequently, the breadth of our intellectual property rights in some countries outside the U.S. may be less extensive than those in the U.S. In addion, the
laws of some countries do not protect intellectual property rights to the same extent as laws in the U.S. As a result, we may not be able to prevent third
pares from praccing our invenons in all countries outside the U.S., or from selling or imporng products made using our invenons in and into the U.S. or
other  countries.  Competors  may  use  our  technologies  in  countries  where  we  have  not  obtained  patent  protecon  to  develop  their  own  products  and,
further, may infringe our patents in territories where we have patent protecon, but where enforcement is not as strong as in the U.S. These products may
compete with our products and our patents or other intellectual property rights may not be effecve or sufficient to prevent them from compeng.

Many companies have encountered significant problems in protecng and defending intellectual property rights in certain countries. The legal systems of
certain countries, parcularly certain developing countries, do not favor the enforcement of patents, trade secrets and other intellectual property, parcularly
those relang to pharmaceucal and biotechnology products, which could make it difficult for us to stop the infringement of our patents or the markeng of
compeng products in violaon of our proprietary rights generally. Proceedings to enforce our patent rights in countries outside of the U.S. could result in
substanal costs and divert our efforts and aenon from other aspects of our business, could put our patents at risk of being invalidated or interpreted
narrowly and our patent applicaons at risk of not issuing, and could provoke third pares to assert claims against us. We may not prevail in any lawsuits that
we iniate, and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual
property  rights  around  the  world  may  be  inadequate  to  obtain  a  significant  commercial  advantage  for  our  products  and  product  candidates  from  the
intellectual property that we develop or license.

The intellectual property that we own or have licensed and related non-patent exclusivity relang to our current and future products is, and may be,
limited, which could adversely affect our ability to compete in the market and adversely affect the value of Auryxia, vadadustat, if approved, or other
future products.

The patent rights and related non-patent exclusivity that we own or have licensed relang to Auryxia, vadadustat, or other future products, are, or may be
limited in ways that may affect our ability to exclude third pares from compeng against us.

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For example, a third party may design around our owned or licensed composion of maer patent claims or market a product for the methods of use not
covered by our owned or licensed patents.

Obtaining  proof  of  direct  infringement  by  a  competor  for  a  method  of  use  patent  requires  us  to  demonstrate  that  the  competors  make  and  market  a
product for the patented use(s). Alternavely, we can prove that our competors induce or contribute to others in engaging in direct infringement. Proving
that  a  competor  contributes  to  or  induces  infringement  of  a  patented  method  by  another  has  addional  proof  requirements.  For  example,  proving
inducement  of  infringement  requires  proof  of  intent  by  the  competor.  If  we  are  required  to  defend  ourselves  against  claims  or  to  protect  our  own
proprietary  rights  against  others,  it  could  result  in  substanal  costs  to  us  and  the  distracon  of  our  management.  An  adverse  ruling  in  any  ligaon  or
administrave proceeding could prevent us or our partners from markeng and selling Auryxia, Vafseo or vadadustat, if approved, or other future products,
increase the risk that a generic or other similar version of Auryxia, Vafseo or vadadustat, if approved, or other future products could enter the market to
compete with Auryxia, Vafseo or vadadustat, if approved, or other future products, limit our or our partners' development and commercializaon of Auryxia,
Vafseo or vadadustat, if approved, or other future products, or otherwise harm our compeve posion and result in addional significant costs.

Moreover, physicians may prescribe a compeve idencal product for indicaons other than the one for which the product has been approved, or “off-label”
indicaons, that are covered by the applicable patents. Although such off-label prescripons may directly infringe or contribute to or induce infringement of
method of use patents, such infringement is difficult to prevent.

In addion, any limitaons of our patent protecon described above may adversely affect the value of our drug product and may inhibit our ability to obtain a
collaboraon partner at terms acceptable to us, if at all.

In addion to patent rights in the U.S., we may seek non-patent exclusivity for vadadustat and other future products under other provisions of the FDCA such
as new chemical enty, or NCE, exclusivity, or exclusivity for a new use or new formulaon, but there is no guarantee that vadadustat or any other future
products will receive such exclusivity. The FDCA provides a five-year period of non-patent exclusivity within the U.S. to the first sponsor to gain approval of an
NDA  for  an  NCE.  A  drug  is  an  NCE  if  the  FDA  has  not  previously  approved  any  other  new  drug  containing  the  same  acve  moiety,  which  consists  of  the
molecule(s) or ion(s) responsible for the acon of the drug substance (but not including those porons of the molecule that cause it to be a salt or ester or
which are not bound to the molecule by covalent or similar bonds). During the exclusivity period, the FDA may not accept for review an ANDA or a 505(b)(2)
NDA  submied  by  another  company  for  another  version  of  such  drug  where  the  sponsor  does  not  own  or  have  a  legal  right  of  reference  to  all  the  data
required for approval.

An  ANDA  that  references  an  NDA  product  with  NCE  exclusivity  may  be  submied  aer  four  years  if  it  contains  a  cerficaon  of  patent  invalidity  or  non-
infringement. The FDCA also provides three years of exclusivity for an NDA, parcularly a 505(b)(2) NDA or supplement to an exisng NDA, if new clinical
invesgaons, other than bioavailability studies, that were conducted or sponsored by the sponsor are deemed by the FDA to be essenal to the approval of
the applicaon (for example, for new indicaons, dosages, or strengths of an exisng drug). This three-year exclusivity covers only the condions associated
with  the  new  clinical  invesgaons  and  does  not  prohibit  the  FDA  from  approving  ANDAs  for  drugs  containing  the  original  acve  agent.  The  three-year
exclusivity period, unlike five-year exclusivity, does not prevent the submission of a compeng ANDA or 505(b)(2) NDA. Instead, it only prevents the FDA from
granng final approval to such a product unl expiraon of the exclusivity period. Five-year and three-year exclusivity will not delay the submission (in the
case of five-year exclusivity) or the approval (in the case of three-year exclusivity) of a full NDA submied under secon 505(b)(1) of the FDCA; however, a
sponsor subming a full NDA would be required to conduct all of its own studies needed to independently support a finding of safety and effecveness for
the proposed product, or have a full right of reference to all studies not conducted by the sponsor.

In cases where NCE exclusivity has been granted to a new drug product, the 30-month stay triggered by such ligaon is extended by the amount of me such
that seven years and six months will elapse from the date of approval of the NDA for that product. Without NCE exclusivity, the 30-month stay on FDA final
approval of an ANDA runs from the date on which the sponsor of the reference listed drug receives noce of a Paragraph IV cerficaon from the ANDA
sponsor.

In addion to NCE, in the U.S., the FDA has the authority to grant addional regulatory exclusivity protecon for approved drugs where the sponsor conducts
specified tesng in pediatric or adolescent populaons. If granted, this pediatric exclusivity may provide an addional six months which are added to the term
of any non-patent exclusivity that has been awarded as well as to the regulatory protecon related to the term of a relevant patent, to the extent these
protecons have not already expired.

We cannot assure you that Auryxia, vadadustat, if approved, or any of our potenal future products will obtain such pediatric exclusivity, NCE exclusivity or
any other market exclusivity in the U.S., EU or any other territory, or that we will be the first to receive the respecve regulatory approval for such drugs so as
to be eligible for any non-patent exclusivity protecon. We

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also cannot assure you that Auryxia, vadadustat, if approved, or any of our potenal future products will obtain patent term extension.

The market entry of one or more generic competors or any third party’s aempt to challenge our intellectual property rights will likely limit Auryxia sales
and have an adverse impact on our business and results of operaon.

Although the composion and use of Auryxia is currently claimed by 14 issued patents that are listed in the FDA’s Orange Book, we cannot assure you that we
will  be  successful  in  defending  against  third  pares  aempng  to  invalidate  or  design  around  our  patents  or  asserng  that  our  patents  are  invalid  or
otherwise  unenforceable  or  not  infringed,  or  in  compeng  against  third  pares  introducing  generic  equivalents  of  Auryxia  or  any  of  our  potenal  future
products. If our Orange Book-listed patents are successfully challenged by a third party and a generic version of Auryxia is approved and launched sooner than
we ancipate, revenue from Auryxia could decline significantly, which would have a material adverse effect on our sales, results of operaons and financial
condion.

We previously received Paragraph IV cerficaon noce leers regarding ANDAs submied to the FDA requesng approval for generic versions of Auryxia
tablets (210 mg ferric iron per tablet). We filed complaints for patent infringement relang to such ANDAs, and subsequently entered into selement and
license agreements with all such ANDA filers that allow such ANDA filers to market a generic version of Auryxia in the U.S. beginning on March 20, 2025. It is
possible that we may receive Paragraph IV cerficaon noce leers from addional ANDA filers and may not ulmately be successful in an ANDA ligaon.
Generic compeon for Auryxia or any of our potenal future products could have a material adverse effect on our sales, results of operaons and financial
condion.

Ligaon  and  administrave  proceedings,  including  third  party  claims  of  intellectual  property  infringement  and  opposion/invalidaon  proceedings
against third party patents, may be costly and me consuming and may delay or harm our drug discovery, development and commercializaon efforts.

We may be forced to iniate ligaon to enforce our contractual and intellectual property rights, or we may be sued by third pares asserng claims based on
contract, tort or intellectual property infringement. Competors may infringe our patents or misappropriate our trade secrets or confidenal informaon. We
may not be able to prevent infringement of our patents or misappropriaon of our trade secrets or confidenal informaon, parcularly in countries where
the laws may not protect those rights as fully as in the U.S. In addion, third pares may have or may obtain patents in the future and claim that our products
or other technologies infringe their patents. If we are required to defend against suits brought by third pares, or if we sue third pares to protect our rights,
we may be required to pay substanal ligaon costs, and our management’s aenon may be diverted from operang our business. In addion, any legal
acon against our licensor, licensees or us that seeks damages or an injuncon of commercial acvies relang to Auryxia, vadadustat or any other product
candidates  or  other  technologies,  including  those  that  may  be  in-licensed  or  acquired,  could  subject  us  to  monetary  liability,  a  temporary  or  permanent
injuncon prevenng the development, markeng and sale of such products or such technologies, and/or require our licensor, licensees or us to obtain a
license to connue to develop, market or sell such products or other technologies. In addion, in an infringement proceeding, a court may decide that a
patent of ours is not valid or is unenforceable, or may refuse to stop the other party from using the technology at issue on the grounds that our patents do
not cover the technology in queson. We cannot predict whether our licensor, licensees or we would prevail in any of these types of acons or that any
required license would be made available on commercially acceptable terms, if at all.

Our commercial success depends in part on our avoiding infringement of the patents and proprietary rights of third pares. However, there may be patents of
third  pares  of  which  we  are  currently  unaware  with  claims  to  compounds,  materials,  formulaons,  methods  of  manufacture  or  methods  for  treatment
related to the use or manufacture of our product candidates. Also, because patent applicaons can take many years to issue, there may be currently pending
patent applicaons which may later result in issued patents that our product candidates may infringe. The pharmaceucal and biotechnology industries are
characterized by extensive ligaon over patent and other intellectual property rights. We have in the past and may in the future become a party to, or be
threatened with, future adversarial ligaon or other proceedings regarding intellectual property rights with respect to our product and product candidates.
As  the  pharmaceucal  and  biotechnology  industries  expand  and  more  patents  are  issued,  the  risk  increases  that  our  product  candidates  may  give  rise  to
claims of infringement of the patent rights of others.

While our product candidates are in preclinical studies and clinical trials, we believe that the use of our product candidates in these preclinical studies and
clinical  trials  in  the  U.S.  falls  within  the  scope  of  the  exempons  provided  by  35  U.S.C.  Secon  271(e),  which  provides  that  it  shall  not  be  an  act  of
infringement  to  make,  use,  offer  to  sell,  or  sell  within  the  U.S.  or  import  into  the  U.S.  a  patented  invenon  solely  for  uses  reasonably  related  to  the
development and submission of informaon to the FDA. There is an increased possibility of a patent infringement claim against us with respect to commercial
products. Our porolio includes one commercial product, Auryxia. We received the CRL from the FDA regarding our NDA for vadadustat in March 2022, and
we resubmied our NDA in September 2023. If in the future vadadustat is approved, vadadustat could be commercialized. We aempt to ensure that our
products and product candidates and the methods we employ to

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manufacture them, as well as the methods for their use which we intend to promote, do not infringe other pares’ patents and other proprietary rights.
There can be no assurance they do not, however, and competors or other pares may assert that we infringe their proprietary rights in any event.

FibroGen  has  filed  patent  applicaons  in  the  U.S.  and  other  countries  directed  to  purportedly  new  methods  of  using  previously  known  heterocyclic
carboxamide compounds for purposes of treang or affecng specified condions, and some of these applicaons have since issued as patents. In November
2023, we and our collaboraon partner, MTPC, entered into a Selement and Cross License Agreement, or the Selement Agreement, with FibroGen and its
collaboraon partner, Astellas. The Selement Agreement resolves all patent disputes between us, MTPC, FibroGen and Astellas in the EU, the contracng
states to the European Patent Convenon, the UK and Japan, or the Selement Territory. We discuss the status of the opposion and proceedings against
certain FibroGen patents in Part I, Item 3. Legal Proceedings of this Form 10-K. We may in the future iniate invalidity acons or other legal proceedings with
respect to FibroGen patents outside of the Selement Territory. If we are not successful in such proceedings, FibroGen could try to claim that our products
infringe their patent rights.

Third pares, including FibroGen, may in the future claim that our product and product candidates and other technologies infringe upon their patents and
may  challenge  our  ability  to  commercialize  Auryxia  and  vadadustat,  if  approved.  Pares  making  claims  against  us  or  our  licensees  may  seek  and  obtain
injuncve  or  other  equitable  relief,  which  could  effecvely  block  our  or  their  ability  to  connue  to  commercialize  Auryxia  or  further  develop  and
commercialize vadadustat or any other product candidates, including those that may be in-licensed or acquired. If any third party patents were held by a
court  of  competent  jurisdicon  to  cover  the  manufacturing  process  of  any  of  our  products  or  product  candidates,  any  molecules  formed  during  the
manufacturing process or any final product itself, the holders of any such patents may be able to block our ability to commercialize such product or product
candidate  unless  we  obtained  a  license  under  the  applicable  patents,  or  unl  such  patents  expire  or  they  are  finally  determined  to  be  held  invalid  or
unenforceable.  Similarly,  if  any  third  party  patent  were  held  by  a  court  of  competent  jurisdicon  to  cover  aspects  of  our  formulaons,  processes  for
manufacture or our intended methods of use, the holders of any such patent may be able to block or impair our ability to develop and commercialize the
applicable product candidate unless we obtained a license or unl such patent expires or is finally determined to be held invalid or unenforceable. We may
also elect to enter into a license in order to sele ligaon or in order to resolve disputes prior to ligaon. Furthermore, even in the absence of ligaon, we
may need to obtain licenses from third pares to advance our research or allow commercializaon of our products or product candidates. Should a license to
a third party patent become necessary, we cannot predict whether we would be able to obtain a license or, if a license were available, whether it would be
available  on  commercially  reasonable  terms.  If  such  a  license  is  necessary  and  a  license  under  the  applicable  patent  is  unavailable  on  commercially
reasonable terms, or at all, our ability to commercialize our product or product candidate may be impaired or delayed, which could in turn significantly harm
our business.

Further,  defense  of  infringement  claims,  regardless  of  their  merit,  would  involve  substanal  ligaon  expense  and  would  be  a  substanal  diversion  of
employee  resources  from  our  business.  In  the  event  of  a  successful  claim  of  infringement  against  us,  we  may  have  to  pay  substanal  damages,  including
treble damages and aorneys’ fees for willful infringement, pay royales or redesign our products, which may be impossible or require substanal me and
monetary expenditure.

In addion, there may be a challenge or dispute regarding inventorship or ownership of patents or applicaons currently idenfied as being owned by or
licensed  to  us.  Defense  of  these  claims,  regardless  of  their  merit,  would  involve  substanal  ligaon  expense  and  would  be  a  substanal  diversion  of
employee  resources  from  our  business.  Interference  proceedings  provoked  by  third  pares  or  brought  by  the  USPTO  may  be  necessary  to  determine  the
priority of invenons with respect to our patents or patent applicaons.

Various administrave proceedings are also available for challenging patents, including interference, reexaminaon, inter partes review, and post-grant review
proceedings  before  the  USPTO  or  opposions  and  other  comparable  proceedings  in  foreign  jurisdicons.  Competors  may  iniate  an  administrave
proceeding challenging our issued patents or pending patent applicaons, which can be expensive and me-consuming to defend. An adverse result in any
current or future defense proceedings could put one or more of our patents at risk of being invalidated, held unenforceable, or interpreted narrowly and held
not infringed and could put our patent applicaons at risk of not issuing. In addion, an unfavorable outcome in any current or future proceeding in which we
are challenging third party patents could require us to cease using the patented technology or to aempt to license rights to it from the prevailing party. Our
business could be harmed if the prevailing party does not offer us a license on commercially reasonable terms or at all. Even if we are successful, parcipaon
in interference or other administrave proceedings before the USPTO or a foreign patent office may result in substanal costs and distract our management
and other employees.

We are currently involved in opposion proceedings in the European Patent Office and Indian Patent Office. These proceedings may be ongoing for a number
of years and may involve substanal expense and diversion of employee resources from our business. In addion, we may become involved in addional
opposion proceedings or other legal or administrave proceedings in the future. For more informaon, see the other risk factors under “Risks Related to our
Intellectual Property”.

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Furthermore,  because  of  the  substanal  amount  of  discovery  required  in  connecon  with  intellectual  property  ligaon  and  some  administrave
proceedings, there is a risk that some of our confidenal informaon could be compromised by disclosure during discovery. In addion, there could be public
announcements of the results of hearings, moons or other interim proceedings or developments. If securies analysts or investors perceive these results to
be negave, it could have a substanal adverse effect on the price of our common stock.

We may be subject to claims that our employees, consultants or independent contractors have wrongfully used or disclosed confidenal informaon of
third pares.

We have received confidenal and proprietary informaon from potenal collaborators, prospecve licensees and other third pares. In addion, we employ
individuals who were previously employed at other biotechnology or pharmaceucal companies. We may be subject to claims that we or our employees,
consultants or independent contractors have inadvertently or otherwise used or disclosed confidenal informaon of these third pares or our employees’
former employers. We may also be subject to claims that former employees, collaborators or other third pares have an ownership interest in our patents or
other intellectual property. We may be subject to ownership disputes in the future arising, for example, from conflicng obligaons of consultants or others
who are involved in developing our product candidates. Ligaon may be necessary to defend against these claims. If we fail in defending any such claims, in
addion to paying monetary damages, we may lose valuable intellectual property rights, such as exclusive ownership of, or right to use, valuable intellectual
property. Such an outcome could have a material adverse effect on our business. Even if we are successful in defending against these claims, ligaon could
result in substanal cost and be a distracon to our management and employees.

Risks Related to our Business and Managing Growth

If we fail to aract, retain and movate senior management and qualified personnel, we may be unable to successfully develop, obtain and/or maintain
markeng approval of and commercialize vadadustat or commercialize Auryxia.

Recruing  and  retaining  qualified  personnel  is  crical  to  our  success.  We  are  also  highly  dependent  on  our  execuves,  certain  members  of  our  senior
management and certain members of our commercial organizaon. The loss of the services of our execuves, senior managers or other employees could
impede the achievement of our research, development, regulatory and commercializaon objecves and seriously harm our ability to successfully implement
our business strategy. Specifically, following receipt of the CRL, we implemented a reducon of our workforce in April and May 2022 by approximately 42%
across all areas of our Company (47% inclusive of the closing of the majority of open posions), including several members of management. In November
2022, we also implemented a reducon of our workforce, by approximately 14% consisng of individuals within our commercial organizaon as a result of
our  decision  to  shi  to  a  strategic  account  management  focused  model  for  our  commercial  efforts.  In  addion,  uncertainty  related  to  the  outcome  of
regulatory decisions, could increase arion. Losing members of management and other key personnel subjects us to a number of risks, including the failure
to coordinate responsibilies and tasks, the necessity to create new management systems and processes, the impact on corporate culture, and the retenon
of historical knowledge.

Furthermore,  replacing  execuves,  senior  managers  and  other  key  employees  may  be  difficult  and  may  take  an  extended  period  of  me  because  of  the
limited number of individuals in our industry with the breadth of skills and experience required to successfully develop, obtain and/or maintain markeng
approval of and commercialize Auryxia, vadadustat and other product candidates. Our future financial performance and our ability to develop, obtain and/or
maintain  markeng  approval  of  and  commercialize  Auryxia  and  vadadustat  and  to  compete  effecvely  will  depend,  in  part,  on  our  ability  to  manage  any
future growth effecvely. To that end, we must be able to hire, train, integrate, and retain addional qualified personnel with sufficient experience. We may
be unable to hire, train, retain or movate these personnel on acceptable terms given the intense compeon for our personnel from our competors and
other  companies  throughout  our  industry,  parcularly  in  our  geographic  region.  Over  the  last  several  years,  the  challenges  in  recruing  and  retaining
employees across the pharmaceucal and biotechnology industries have increased substanally due to current industry job market dynamics.

In addion, we rely on contractors, consultants and advisors, including scienfic and clinical advisors, to assist us in formulang and execung our R&D and
commercializaon strategy. Our contractors, consultants and advisors may become employed by companies other than ours and may have commitments with
other enes that may limit their availability to us. If addional members of management or other personnel leave, or we are unable to connue to aract
and retain high quality personnel, our ability to grow and pursue our business strategy will be limited.

Our cost savings plan and the associated workforce reducons implemented in April, May and November 2022 may not result in ancipated savings, could
result in total costs and expenses that are greater than expected and could disrupt our business.

Following  receipt  of  the  CRL  we  implemented  a  reducon  in  workforce  in  April  and  May  2022  by  approximately  42%  across  all  areas  of  our  Company,
including several members of management. In November 2022, we also implemented a reducon of

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our workforce, by approximately 14% consisng of individuals within our commercial organizaon as a result of our decision to shi to a strategic account
management focused model for our commercial efforts. The reducons in workforce reflected our determinaon to refocus our strategic priories around
our commercial product, Auryxia, and our development porolio, and were steps in a broader cost savings plan to significantly reduce our operang expense
profile. We may not realize, in full or in part, the ancipated benefits, savings and improvements in our cost structure from our restructuring efforts due to
unforeseen difficules, delays or unexpected costs. We recorded a restructuring charge of approximately $0.2 million and $15.9 million in the years ended
December 31, 2023 and 2022, respecvely, primarily related to contractual terminaon benefits including severance, non-cash stock-based compensaon
expense,  healthcare  and  related  benefits.  If  we  are  unable  to  realize  the  expected  operaonal  efficiencies  and  cost  savings  from  the  restructuring,  our
operang results and financial condion would be adversely affected. We also cannot guarantee that we will not have to undertake addional workforce
reducons or restructuring acvies in the future, including as a result of the FDA's decision related to our NDA resubmission for vadadustat. Furthermore,
our  cost  savings  plan  may  be  disrupve  to  our  operaons,  including  our  commercializaon  of  Auryxia,  which  could  affect  our  ability  to  generate  product
revenue. In addion, our workforce reducons could yield unancipated consequences, such as arion beyond planned staff reducons, or disrupons in
our day-to-day operaons. Our workforce reducons could also harm our ability to aract and retain qualified management, scienfic, clinical, manufacturing
and sales and markeng personnel who are crical to our business. Any failure to aract or retain qualified personnel could prevent us from successfully
commercializing Auryxia and from successfully developing and commercializing our product candidates in the future, including vadadustat, if approved. If we
are  ulmately  successful  in  obtaining  approval  of  vadadustat  in  the  U.S.,  we  will  need  to  hire  addional  employees  to  support  the  commercializaon  of
vadadustat in the U.S., and if we are unsuccessful or delayed in doing so, the potenal launch of vadadustat could be delayed.

We  may  encounter  difficules  in  managing  our  growth,  including  with  respect  to  our  employee  base,  and  managing  our  partnerships  and  operaons
successfully.

In  our  day-to-day  operaons,  we  may  encounter  difficules  in  managing  the  size  of  our  operaons  as  well  as  challenges  associated  with  managing  our
business. We have strategic collaboraons for the commercializaon of Riona and the development and commercializaon of vadadustat, which is now being
or will be marketed under the trade name Vafseo by our collaboraon partner, MTPC, in Japan and our collaboraon partner, Medice, in the Medice Territory.
Addionally,  in  the  U.S.,  we  have  a  strategic  relaonship  with  CSL  Vifor  related  to  the  commercializaon  of  vadadustat,  if  approved.  As  our  operaons
connue, we expect that we will need to manage our current relaonships and enter into new relaonships with various strategic collaborators, consultants,
vendors, suppliers and other third pares. These relaonships are complex and create numerous risks as we deal with issues that arise.

For example, we supply or have agreed to supply, as applicable, Auryxia in Europe, Vafseo in Japan, Europe and other territories where it is approved, and
vadadustat in the U.S., if approved, for commercial and clinical use to MTPC, Medice, Averoa and CSL Vifor, which will require us to successfully manage our
limited  financial  and  managerial  resources.  In  addion,  we  may  not  be  able  to  obtain  the  raw  materials  or  product  that  we  need,  or  the  cost  of  the  raw
materials or product may be higher than expected. If we are unable to successfully manage our supply obligaons, our ability to commercialize our products
or supply such products to our partners could have a material adverse effect on our relaonships with our partners and our results of operaons.

Our future financial performance and our ability to commercialize Auryxia and vadadustat, if and where approved, and to compete effecvely will depend, in
part, on our ability to manage any future growth effecvely. This future growth will impose significant added responsibilies on the business and members of
management. To manage any future growth, we must connue to implement and improve our managerial, operaonal and financial systems, procedures and
processes.  We  may  not  be  able  to  implement  these  improvements  in  an  efficient  or  mely  manner  and  may  discover  deficiencies  in  exisng  systems,
procedures  and  processes.  Moreover,  the  systems,  procedures  and  processes  currently  in  place  or  to  be  implemented  may  not  be  adequate  for  any  such
growth. Any expansion of our operaons may lead to significant costs and may divert our management and business development resources. Any inability to
manage growth could delay the execuon of our business plans or disrupt our operaons. We may not be able to accomplish these tasks, and our failure to
accomplish any of them could prevent us from successfully managing and, as applicable, growing our Company.

In  addion,  we  may  need  to  further  adjust  the  size  of  our  workforce  as  a  result  of  changes  to  our  expectaons  for  our  business,  which  can  result  in
management being required to divert a disproporonate amount of its aenon away from our day-to-day acvies and devote a substanal amount of me
to  managing  these  growth-related  acvies  and  related  expenses.  Further,  we  rely  on  independent  third  pares  to  provide  certain  services  to  us.  We
structure  our  relaonships  with  these  outside  service  providers  in  a  manner  that  we  believe  results  in  an  independent  contractor  relaonship,  not  an
employee relaonship. If any of our service providers are later legally deemed to be employees, we could be subject to employment and tax withholding
liabilies and other addional costs as well as other mulple damages and aorneys’ fees.

We have idenfied a material weakness in our internal control over financial reporng as of December 31, 2023 relang to our accounng for inventory
and inventory related transacons. If we are not able to remediate this material weakness, or

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if we experience addional material weaknesses or other deficiencies in our internal control over financial reporng in the future or otherwise fail to
maintain an effecve system of internal control over financial reporng, we may not be able to accurately or mely report our financial results or prevent
fraud, and we may conclude that our internal control over financial reporng is not effecve, which may adversely affect our business.

Effecve internal control over financial reporng is necessary for us to provide reliable financial reports and, together with adequate disclosure controls and
procedures,  is  designed  to  prevent  fraud.  Any  failure  to  maintain  or  implement  required  new  or  improved  controls,  or  difficules  encountered  in
implementaon could cause us to fail to meet our reporng obligaons. In addion, any tesng by us, as and when required, conducted in connecon with
Secon 404 of the Sarbanes-Oxley Act, or Secon 404, or any tesng by our independent registered public accounng firm may reveal deficiencies in our
internal  control  over  financial  reporng  that  are  deemed  to  be  material  weaknesses  or  that  may  require  prospecve  or  retroacve  changes  to  our
consolidated financial statements or idenfy other areas for further aenon or improvement.

We  idenfied  a  material  weakness  in  our  internal  control  over  financial  reporng  as  of  December  31,  2023.  A  material  weakness  is  a  deficiency,  or
combinaon of deficiencies, in internal control over financial reporng, such that there is a reasonable possibility that a material misstatement of our annual
or interim consolidated financial statements will not be prevented or detected on a mely basis. Specifically, our management concluded that we did not
design and maintain effecve controls over the completeness and accuracy of accounng for inventory and inventory related transacons, including inventory
reconciliaons, calculaon of overheads, presentaon of inventory in our balance sheet between short-term and long-term and our liabilies related to the
calculaon of firm purchase commitments. For further discussion of the material weakness, see Part II, Item 9A, “Controls and Procedures.”

We  have  taken  certain  steps  and  plan  to  take  addional  steps  to  remediate  this  material  weakness,  including  (i)  implemenng  and  documenng  new
processes  and  controls  to  help  ensure  the  completeness  and  accuracy  of  our  inventory  reconciliaons,  (ii)  engaging  addional  third  party  subject  maer
experts and accounng personnel with U.S. GAAP experience specific to inventory accounng, (iii) enhancing the accuracy of key reports used to calculate the
firm purchase commitment and (iv) establishing effecve monitoring and oversight controls to help to ensure the completeness and accuracy of inventory
included in our financial statements and related disclosures. However, we cannot provide assurance that we will be able to correct this material weakness in a
mely manner or that our remediaon efforts will be adequate to allow us to conclude that our internal control over financial reporng will be effecve in the
future. Even if this material weakness is remediated in the future, we could idenfy addional material weaknesses or deficiencies in our internal control over
financial  reporng  that  could  require  correcon  or  remediaon.  For  example,  we  previously  idenfied  a  material  weakness  in  our  internal  control  over
financial reporng as of December 31, 2022 relang to our product return reserves that resulted in a revision of our financial statements for the years ended
December 31, 2022, 2021 and 2020.

In addion, our conclusion that we have a material weakness could give rise to increased scruny, review, audit and invesgaon over our accounng controls
and procedures, which could then lead to addional areas of deficiency or errors in our financial statements.

We will need to connue to dedicate internal resources, engage outside consultants and maintain a detailed work plan to assess and document the adequacy
of internal control over financial reporng, connue steps to remediate the material weakness relang to our accounng for inventory and inventory related
transacons  described  above  and  any  future  control  deficiencies  or  material  weaknesses,  and  improve  control  processes  as  appropriate,  validate  through
tesng  that  controls  are  funconing  as  documented  and  maintain  a  connuous  reporng  and  improvement  process  for  internal  control  over  financial
reporng. If we are not able to correct material weaknesses or deficiencies in internal controls in a mely manner or otherwise comply with the requirements
of Secon 404 in a mely manner, our ability to record, process, summarize and report financial informaon accurately and within applicable me periods
may be adversely affected, and we could be subject to sancons or invesgaons by the SEC, the Nasdaq Stock Market or other regulatory authories as well
as stockholder ligaon which, even if resolved in our favor, would require addional financial and management resources and could adversely affect the
market price of our common stock. Any failure to maintain or implement required effecve internal control over financial reporng, or any difficules we
encounter in their implementaon, could result in addional material weaknesses, cause us to fail to meet our reporng obligaons or result in material
misstatements  in  our  financial  statements.  Furthermore,  if  we  cannot  provide  reliable  financial  reports  or  prevent  fraud,  our  business  and  results  of
operaons could be harmed. Inferior internal controls could also cause investors to lose confidence in our reported financial informaon, which could have a
negave effect on the trading price of our common stock and could also affect our ability to raise capital to fund future business iniaves.

Security breaches and unauthorized use of our informaon technology systems and informaon, or the informaon technology systems or informaon in
the possession of our collaborators and other third pares, could damage the integrity of our clinical trials, impact our regulatory filings, compromise our
ability to protect our intellectual property, and subject us to regulatory acons that could result in significant fines or other penales.

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We, our collaborators, contractors and other third pares rely significantly upon informaon technology, and any failure, inadequacy, interrupon or security
lapse  of  that  technology,  including  any  cybersecurity  incidents,  could  harm  our  ability  to  operate  our  business  effecvely.  In  addion,  we  and  our
collaborators, contractors and other third pares rely on informaon technology networks and systems, including the Internet and arficial intelligence based
soware, to process, transmit and store clinical trial data, paent informaon, and other electronic informaon, and manage or support a variety of business
processes, including operaonal and financial transacons and records, personal idenfying informaon, payroll data and workforce scheduling informaon.
We purchase most of our informaon technology from vendors, on whom our systems depend. We rely on commercially available systems, soware, tools
and monitoring to provide security for the processing, transmission and storage of company and customer informaon.

In the ordinary course of our business, we and our third party contractors maintain personal and other sensive data on our and their respecve networks,
including  our  intellectual  property  and  proprietary  or  confidenal  business  informaon  relang  to  our  business  and  that  of  our  clinical  trial  paents  and
business partners. In parcular, we rely on CROs and other third pares to store and manage informaon from our clinical trials. We also rely on third pares
to manage paent informaon for Auryxia. Addionally, the use of arficial intelligence based soware is increasingly being used in the biopharmaceucal
industry. Use of arficial intelligence based soware may lead to the release of confidenal proprietary informaon, which may impact our ability to realize
the benefit of our intellectual property. The secure maintenance of this sensive informaon is crical to our business and reputaon.

Companies and other enes and individuals have been increasingly subject to a wide variety of security incidents, cyber-aacks and other aempts to gain
unauthorized access to systems and informaon. These threats can come from a variety of sources, ranging in sophiscaon from individual hackers to state-
sponsored  aacks.  Aackers  have  used  arficial  intelligence  and  machine  learning  to  launch  more  automated,  targeted  and  coordinated  aacks  against
targets. Cyber threats may be broadly targeted, or they may be custom-craed against our informaon systems or those of our vendors or third party service
providers. A security breach, cyberaack or unauthorized access of our clinical data or other data could damage the integrity of our clinical trials, impact our
regulatory  filings,  cause  significant  risk  to  our  business,  compromise  our  ability  to  protect  our  intellectual  property,  and  subject  us  to  regulatory  acons,
including under the GDPR and CCPA discussed elsewhere in these risk factors and the privacy or security rules under federal, state, or other local laws outside
of  the  U.S.  protecng  confidenal  or  personal  informaon,  that  could  be  expensive  to  defend  and  could  result  in  significant  fines  or  other  penales.
Cyberaacks can include malware, computer viruses, hacking, social engineering, zero day vulnerabilies or other unauthorized access or other significant
compromise of our computer, communicaons and related systems. Although we take steps to manage and avoid these risks and to be prepared to respond
to  aacks,  our  prevenve  and  any  remedial  acons  may  not  be  successful  and  no  such  measures  can  eliminate  the  possibility  of  the  systems’  improper
funconing or the improper access or disclosure of confidenal or personally idenfiable informaon such as in the event of cyberaacks. Security breaches,
whether through physical or electronic break-ins, computer viruses, ransomware, impersonaon of authorized users, aacks by hackers or other means, can
create system disrupons or shutdowns or the unauthorized disclosure of confidenal informaon.

Although  we  believe  our  collaborators,  vendors  and  service  providers,  such  as  our  CROs,  take  steps  to  manage  and  avoid  informaon  security  risks  and
respond  to  aacks,  we  may  be  adversely  affected  by  aacks  against  our  collaborators,  vendors  or  service  providers,  and  we  may  not  have  adequate
contractual  remedies  against  such  collaborators,  vendors  and  service  providers  to  remedy  any  harm  to  our  business  caused  by  such  event.  Addionally,
outside  pares  may  aempt  to  fraudulently  induce  employees,  collaborators,  or  other  contractors  to  disclose  sensive  informaon  or  take  other  acons,
including making fraudulent payments or downloading malware, by using “spoofing” and “phishing” emails or other types of aacks. Our employees may be
targeted  by  such  fraudulent  acvies.  Outside  pares  may  also  subject  us  to  distributed  denial  of  services  aacks  or  introduce  viruses  or  other  malware
through “trojan horse” programs to our users’ computers in order to gain access to our systems and the data stored therein. Cyber-aacks have become more
prevalent and much harder to detect and defend against. Because the techniques used to obtain unauthorized access, disable or degrade service, or sabotage
systems change frequently and connuously become more sophiscated, including the use of arficial intelligence to generate sophiscated spoofed emails
and deep fake voice and video, oen are not recognized unl launched against a target and may be difficult to detect for a long me, we may be unable to
ancipate  these  techniques  or  to  implement  adequate  prevenve  or  detecve  measures,  and  we  might  not  immediately  detect  such  incidents  and  the
damage caused by such incidents.

Such aacks, whether successful or unsuccessful, or other compromises with respect to our informaon security and the measures we implement to prevent,
detect and respond to them, could:

•

•

result  in  our  incurring  significant  costs  related  to,  for  example,  rebuilding  internal  systems,  defending  against  ligaon,  responding  to  regulatory
inquiries or acons, paying damages or fines, or taking other remedial steps with respect to third pares;

lead to public exposure of personal informaon of parcipants in our clinical trials, Auryxia paents and others;

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•

•

•

•

damage the integrity of our studies or delay their compleon, disrupt our development programs, our business operaons and commercializaon
efforts;

compromise our ability to protect our trade secrets and proprietary informaon;

damage our reputaon and deter business partners from working with us; or

divert the aenon of our management and key informaon technology resources.

Any failure to maintain proper funconality and security of our internal computer and informaon systems could result in a loss of, or damage to, our data or
markeng applicaons or inappropriate disclosure of confidenal or proprietary informaon, interrupt our operaons, damage our reputaon, subject us to
liability claims or regulatory penales, under a variety of federal, state or other applicable privacy laws, such as HIPAA, the GDPR, or state data protecon
laws including the CCPA, harm our compeve posion and delay the further development and commercializaon of our products and product candidates, or
impact our relaonships with customers and paents.

Our  employees,  independent  contractors,  principal  invesgators,  CROs,  CMOs,  consultants  and  vendors  may  engage  in  misconduct  or  other  improper
acvies,  including  non-compliance  with  regulatory  standards  and  requirements  and  insider  trading.  In  addion, laws  and  regulaons  governing  any
internaonal operaons we have or may have in the future may require us to develop and implement costly compliance programs.

We  are  exposed  to  the  risk  that  our  employees,  independent  contractors,  principal  invesgators,  CROs,  CMOs,  consultants  and  vendors  may  engage  in
fraudulent conduct or other illegal acvity. Misconduct by these pares could include intenonal, reckless and/or negligent conduct or unauthorized acvies
that violate applicable laws, including the following:

•

•

•

•

•

FDA  and  other  healthcare  authories’  regulaons,  including  those  laws  that  require  the  reporng  of  true,  complete  and  accurate  informaon  to
regulatory authories, and those prohibing the promoon of unapproved drugs or approved drugs for an unapproved use;

quality standards, including GxP;

federal and state healthcare fraud and abuse laws and regulaons and their non-U.S. equivalents;

an-bribery and an-corrupon laws, such as the FCPA and the UK Bribery Act or country-specific an-bribery or an-corrupon laws, as well as
various import and export laws and regulaons;

laws that require the reporng of true and accurate financial informaon and data; and

• U.S. state and federal securies laws and regulaons and their non-U.S. equivalents, including those related to insider trading.

We hold a markeng authorizaon for vadadustat from the MHRA and TGA, and we conducted our global clinical trials for vadadustat, and may in the future
conduct addional trials, in countries where corrupon is prevalent, and violaons of any of these laws by our personnel or by any of our vendors or agents,
such as our CROs or CMOs, could have a material adverse impact on our clinical trials and our business and could result in criminal or civil fines and sancons.
We  are  subject  to  complex  laws  that  govern  our  internaonal  business  pracces.  These  laws  include  the  FCPA,  which  prohibits  U.S.  companies  and  their
intermediaries, such as CROs or CMOs, from making improper payments to foreign government officials for the purpose of obtaining or keeping business or
obtaining any kind of advantage for the company. The FCPA also requires companies to keep accurate books and records and maintain adequate accounng
controls. A number of past and recent FCPA invesgaons by the Department of Jusce and the SEC have focused on the life sciences sector.

Compliance with the FCPA is expensive and difficult, parcularly in countries in which corrupon is a recognized problem. Some of the countries in which we
have conducted clinical trials and in which we have CMOs have a history of corrupon, which increases our risks of FCPA violaons. In addion, the FCPA
presents  unique  challenges  in  the  pharmaceucal  industry  because  in  many  countries’  hospitals  are  operated  by  the  government,  and  doctors  and  other
hospital  employees  are  considered  foreign  government  officials.  Certain  payments  made  by  pharmaceucal  companies,  or  on  their  behalf  by  CROs,  to
hospitals  in  connecon  with  clinical  trials  and  other  work  have  been  deemed  to  be  improper  payments  to  government  officials  and  have  led  to  FCPA
enforcement acons.

Addionally,  the  UK  Bribery  Act  applies  to  our  global  acvies  and  prohibits  bribery  of  private  individuals  as  well  as  public  officials.  The  UK  Bribery  Act
prohibits both the offering and accepng of a bribe and imposes strict liability on companies for failing to prevent bribery, unless the company can show that
it had “adequate procedures” in place to prevent bribery. There are also local an-bribery and an-corrupon laws in countries where we have conducted
clinical trials, and many of these also carry the risk of significant financial or criminal penales.

We are also subject to trade control regulaons and trade sancon laws that restrict the movement of certain goods, currency, products, materials, services
and  technology  to,  and  certain  operaons  in,  various  countries  or  with  certain  persons.  Our  ability  to  transfer  commercial  and  clinical  product  and  other
clinical trial supplies, and for our employees, independent

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contractors,  principal  invesgators,  CROs,  CMOs,  consultants  and  vendors  ability  to  travel,  between  certain  countries  is  subject  to  maintaining  required
licenses and complying with these laws and regulaons.

Employee misconduct could also involve the improper use of informaon obtained in the course of clinical trials, which could result in regulatory sancons
and  serious  harm  to  our  reputaon.  This  could  include  violaons  of  HIPAA,  other  U.S.  federal  and  state  laws,  and  requirements  of  non-U.S.  jurisdicons,
including the GDPR. We are also exposed to risks in connecon with any insider trading violaons by employees or others affiliated with us.

The  internal  controls,  policies  and  procedures,  and  training  and  compliance  programs  we  have  implemented  to  deter  prohibited  pracces  may  not  be
effecve  in  prevenng  our  employees,  contractors,  consultants,  agents  or  other  representaves  from  violang  or  circumvenng  such  internal  policies  or
violang  applicable  laws  and  regulaons.  The  failure  to  comply  with  laws  governing  internaonal  business  pracces  may  impact  any  future  clinical  trials,
result  in  substanal  civil  or  criminal  penales  for  us  and  any  such  individuals,  including  imprisonment,  suspension  or  debarment  from  government
contracng,  withdrawal  of  our  products,  if  approved,  from  the  market,  or  being  delisted  from  The  Nasdaq  Capital  Market.  In  addion,  we  may  incur
significant costs in implemenng sufficient systems, controls and processes to ensure compliance with the aforemenoned laws. The laws and regulaons
referenced above may restrict or prohibit a wide range of pricing, discounng, markeng and promoon, sales commission, customer incenve programs and
other business arrangements that could adversely affect our business.

Addionally, it is not always possible to idenfy and deter misconduct by employees and third pares, and the precauons we take to detect and prevent this
acvity may not be effecve in controlling known or unknown risks or prevenng losses or in protecng us from governmental invesgaons or other acons
or lawsuits stemming from a failure to be in compliance with such laws or regulaons. If any such acons are instuted against us, and we are not successful
in defending ourselves or asserng our rights, or if any such acon is instuted against our employees, consultants, independent contractors, CROs, CMOs,
vendors or principal invesgators, those acons could have a significant impact on our business, including the imposion of civil, criminal and administrave
penales,  damages,  monetary  fines,  possible  exclusion  from  parcipaon  in  Medicare,  Medicaid  and  other  federal  healthcare  programs,  contractual
damages,  reputaonal  harm,  diminished  profits  and  future  earnings,  curtailment  of  our  operaons,  disclosure  of  our  confidenal  informaon  and
imprisonment, any of which could adversely affect our ability to operate our business and our results of operaons.

Our financial statements include long-lived assets, including goodwill and an intangible asset as a result of the Merger. The intangible asset has become
impaired and could become further impaired in the future under certain condions. In addion, other long lived assets, including property and equipment,
right-of-use assets or goodwill could become impaired in the future under certain condions. Any potenal future impairment of property and equipment,
our right-of-use assets, goodwill or intangible asset may significantly impact our results of operaons and financial condion.

As of December 31, 2023, we had approximately $95.1 million in the aggregate of goodwill and a definite lived intangible asset from the Merger, $3.6 million
of property and equipment and $12.4 million right-of-use assets. In accordance with ASC 350, Goodwill and Other, we are required annually for goodwill, or
more frequently upon certain indicators of impairment, to review our esmates and assumpons underlying the fair value of our goodwill and intangible
asset. In addion, under ASC 360, Property, Plant and Equipment, we are required to review our property and equipment and right-of-use assets whenever
events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Events giving rise to impairment of long-lived assets
are an inherent risk in the pharmaceucal industry and oen cannot be predicted.

Condions that could indicate impairment and necessitate such a review include, but are not limited to, Auryxia’s commercial performance, our inability to
execute on our strategic iniaves, the deterioraon of our market capitalizaon such that it is significantly below our net book value, a significant adverse
change in legal factors, unexpected adverse business condions, and an adverse acon or assessment by a regulator. To the extent we conclude our long-lived
assets have become impaired, we may be required to incur material write-offs relang to such impairment and any such write-offs could have a material
impact on our future operang results and financial posion. The esmates, judgments and assumpons used in our impairment analyses, and the results of
our  analyses,  are  discussed  in  Note  2,  Summary  of  Significant  Accounng  Policies,  to  our  consolidated  financial  statements  in  Part  II,  Item  8.  Financial
Statements and Supplementary Data of this Form 10-K. If these esmates, judgments and assumpons change in the future, including if the Auryxia asset
group does not meet its current forecasted projecons, addional impairment charges related to plant and equipment, right-of-use assets, goodwill or our
intangible asset could be recorded in the future and addional corresponding adjustments may need to be made to the esmated useful life of the developed
product rights for Auryxia, which could materially impact our financial posion, certain of our material agreements, and our future operang results.

If  product  liability  lawsuits  are  brought  against  us,  we  may  incur  substanal  liabilies  and  may  be  required  to  limit  commercializaon  of  Auryxia  or
vadadustat, if approved.

We face an inherent risk of product liability as a result of the clinical and commercial use of Auryxia and vadadustat. For example, we may be sued if Auryxia
or vadadustat allegedly causes injury or is found to be otherwise unsuitable during clinical

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trials, manufacturing, markeng or sale. Any such product liability claims may include allegaons of defects in manufacturing, defects in design, a failure to
warn of dangers inherent in the product or product candidate, negligence, strict liability and breach of warranes. Claims could also be asserted under state
consumer protecon acts. If we cannot successfully defend ourselves against product liability claims, we may incur substanal liabilies or be required to limit
commercializaon of Auryxia or vadadustat, if approved. Even a successful defense would require significant financial and management resources. Regardless
of the merits or eventual outcome, product liability claims may result in:

•

•

decreased demand for Auryxia or vadadustat, if approved;

injury to our reputaon and significant negave media aenon;

• withdrawal of clinical trial parcipants;

•

•

•

•

•

•

•

•

•

•

delay or terminaon of clinical trials;

our inability to connue to develop Auryxia or vadadustat;

significant costs to defend the related ligaon;

a diversion of management’s me and our resources;

substanal monetary awards to study subjects or paents;

product recalls or withdrawals, or labeling, markeng or promoonal restricons;

decreased demand for Auryxia or vadadustat, if approved;

loss of revenue;

the inability to commercialize Auryxia or vadadustat, if approved; and

a decline in our stock price.

Failure to obtain and retain sufficient product liability insurance at an acceptable cost to protect against potenal product liability claims could prevent or
inhibit the commercializaon of products we develop. We currently carry product liability insurance that we believe is appropriate for our Company. Although
we maintain product liability insurance, any claim that may be brought against us could result in a court judgment or selement in an amount that is not
covered, in whole or in part, by our insurance or that is in excess of the limits of our insurance coverage. Our insurance policies also have various exclusions,
and  we  may  be  subject  to  a  product  liability  claim  for  which  we  have  insufficient  or  no  coverage.  If  we  have  to  pay  any  amounts  awarded  by  a  court  or
negoated in a selement that exceed our coverage limitaons or that are not covered by our insurance, we may not have, or be able to obtain, sufficient
capital to pay such amounts. In addion, insurance coverage is becoming increasingly expensive, and we may not be able to maintain insurance coverage at a
reasonable cost. We also may not be able to obtain addional insurance coverage that will be adequate to cover addional product liability risks that may
arise. Consequently, a product liability claim may result in losses that could be material to our business.

We will connue to incur increased costs as a result of operang as a public company, and our management will be required to devote substanal me to
compliance iniaves and corporate governance pracces.

As a public company, we operate in a demanding regulatory environment, and we have and will connue to incur significant legal, accounng, auding and
other expenses. The Sarbanes-Oxley Act of 2002, or the Sarbanes-Oxley Act, the Dodd-Frank Wall Street Reform and Consumer Protecon Act, the lisng
requirements of The Nasdaq Capital Market and other applicable securies rules and regulaons impose various requirements on public companies, including
establishment and maintenance of effecve disclosure and financial controls and certain corporate governance pracces. In parcular, our compliance with
Secon 404 of the Sarbanes-Oxley Act has required and will connue to require that we incur substanal accounng-related expenses and expend significant
management efforts. Our tesng, or the tesng by our independent registered public accounng firm, may reveal deficiencies in our internal controls that we
would be required to remediate in a mely manner. If we are not able to comply with the requirements of the Sarbanes-Oxley Act, we could be subject to
sancons or invesgaons by the SEC, the Nasdaq Capital Market or other regulatory authories, which would require addional financial and management
resources and could adversely affect the market price of our securies. Furthermore, if we cannot provide reliable financial reports or prevent fraud, including
as a result of remote working by our employees, our business and results of operaons would likely be materially and adversely affected.

We cannot predict or esmate the amount of addional costs we may incur to connue to operate as a public company, nor can we predict the ming of such
costs. These rules and regulaons are oen subject to varying interpretaons, in many cases due to their lack of specificity and, as a result, their applicaon in
pracce  may  evolve  over  me  as  new  guidance  is  provided  by  regulatory  and  governing  bodies,  which  could  result  in  connuing  uncertainty  regarding
compliance maers and higher costs necessitated by ongoing revisions to disclosure and governance pracces.

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Claims for indemnificaon by our directors and officers may reduce our available funds to sasfy successful third-party claims against us and may reduce
the amount of money available to us.

Our  Ninth  Amended  and  Restated  Cerficate  of  Incorporaon,  as  amended,  or  Charter,  and  our  Second  Amended  and  Restated  Bylaws,  or  Bylaws,  as
amended to date, contain provisions that eliminate, to the maximum extent permied by the General Corporaon Law of the State of Delaware, or DGCL, the
personal liability of our directors and execuve officers for monetary damages for breach of their fiduciary dues as a director or officer. Our Charter and our
Bylaws  also  provide  that  we  will  indemnify  our  directors  and  execuve  officers  and  may  indemnify  our  employees  and  other  agents  to  the  fullest  extent
permied by the DGCL.

In  addion,  as  permied  by  Secon  145  of  the  DGCL  our  Bylaws  and  our  indemnificaon  agreements  that  we  have  entered  into  with  our  directors  and
execuve officers provide that:

• We  will  indemnify  our  directors  and  officers,  as  defined  in  our  Bylaws,  for  serving  us  in  those  capacies  or  for  serving  other  related  business
enterprises at our request, to the fullest extent permied by Delaware law. Delaware law provides that a corporaon may indemnify such person if
such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of Akebia and, with
respect to any criminal proceeding, had no reasonable cause to believe such person’s conduct was unlawful.

• We may, in our discreon, indemnify employees and agents in those circumstances where indemnificaon is permied by applicable law.

• We  are  required  to  advance  expenses,  as  incurred,  to  our  directors  and  officers  in  connecon  with  defending  a  proceeding,  except  that  such

directors or officers shall undertake to repay such advances if it is ulmately determined that such person is not entled to indemnificaon.

•

The rights conferred in our Bylaws are not exclusive, and we are authorized to enter into indemnificaon agreements with our directors, officers,
employees and agents and to obtain insurance to indemnify such persons.

Any claims for indemnificaon made by our directors or officers could impact our cash resources and our ability to fund the business.

Our ability to use net operang losses to offset future taxable income may be subject to certain limitaons.

Under Secon 382 of the Internal Revenue Code, or Secon 382, a corporaon that undergoes an “ownership change” is subject to limitaons on its ability to
ulize its pre-change net operang losses, or NOLs, to offset future taxable income. On December 12, 2018, we completed the Merger, which we believe has
resulted in an ownership change under Secon 382. In addion, the Tax Cuts and Jobs Act, including amendments made by the CARES Act, includes changes
to U.S. federal tax rates and the rules governing net operang loss carryforwards that may significantly impact our ability to ulize our net operang losses to
fully  offset  taxable  income  in  the  future.  Future  changes  in  our  stock  ownership,  many  of  which  are  outside  of  our  control,  could  result  in  an  addional
ownership change under Secon 382. As a result, if we generate taxable income, our ability to use our pre-change NOL carryforwards to offset federal taxable
income  may  be  subject  to  limitaons,  which  could  potenally  result  in  increased  future  tax  liability  to  us.  At  the  state  level,  state  net  operang  losses
generated in one state cannot be used to offset income generated in another state and there may be periods during which the use of NOL carryforwards is
suspended or otherwise limited, which could accelerate or permanently increase state taxes owed.

Furthermore, our ability to ulize our NOLs is condioned upon our aaining profitability and generang U.S. taxable income. As described above under “—
Risks  Related  to  our  Financial  Posion,  Need  for  Addional  Capital  and  Growth  Strategy,”  we  have  incurred  significant  net  losses  since  our  incepon  and
ancipate that we will connue to incur losses for the foreseeable future; thus, we do not know whether or when we will generate the U.S. taxable income
necessary to ulize our NOLs.

Our Charter designates the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain types of acons and proceedings that
may be iniated by our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors,
officers or employees.

Our  Charter  provides  that,  subject  to  limited  excepons,  the  Court  of  Chancery  of  the  State  of  Delaware  will  be  the  sole  and  exclusive  forum  for  (i)  any
derivave acon or proceeding brought on our behalf, (ii) any acon asserng a claim of breach of a fiduciary duty owed by any of our directors, officers or
other employees to us or our stockholders, (iii) any acon asserng a claim against us arising pursuant to any provision of the DGCL our Charter or our Bylaws,
or (iv) any other acon asserng a claim against us, our directors, officers or other employees that is governed by the internal affairs doctrine. Under our
Charter,  this  exclusive  forum  provision  will  not  apply  to  claims  that  are  vested  in  the  exclusive  jurisdicon  of  a  court  or  forum  other  than  the  Court  of
Chancery of the State of Delaware, or for which the Court of Chancery of the State of Delaware does not have subject maer jurisdicon. For instance, the
provision would not apply to acons arising under federal securies laws, including suits brought to enforce any liability or duty created by the Securies
Exchange Act of 1934, as amended, or the Exchange Act, or the rules and regulaons thereunder. Any person or enty purchasing or otherwise acquiring any

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interest in shares of our capital stock shall be deemed to have noce of and to have consented to the provisions of our Charter described above. This choice
of forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers or
other  employees,  which  may  discourage  such  lawsuits  against  us  and  our  directors,  officers  and  employees.  Alternavely,  if  a  court  were  to  find  these
provisions  of  our  Charter  inapplicable  to,  or  unenforceable  with  respect  to,  one  or  more  of  the  specified  types  of  acons  or  proceedings,  we  may  incur
addional costs associated with resolving such maers in other jurisdicons, which could adversely affect our business and financial condion.

We  are  currently  subject  to  legal  proceedings  that  could  result  in  substanal  costs  and  divert  management's  aenon,  and  we  could  be  subject  to
addional legal proceedings.

We are currently subject to legal proceedings, including those described in Part I, Item 3. Legal Proceedings in this Form 10-K, and addional claims may arise
in the future. In addion, securies class acon and derivave lawsuits and other legal proceedings are oen brought against companies for any of the risks
described in this Form 10-K following a decline in the market price of their securies. For example, we were party to a putave class acon lawsuit in state
court  filed  by  purported  Keryx  stockholders  challenging  the  disclosures  made  in  connecon  with  the  Merger,  including  those  that  relate  to  vadadustat’s
safety,  approvability  and  commercial  viability.  Oral  argument  was  held  on  October  7,  2022,  and  the  Court  dismissed  the  complaint  without  prejudice  on
October 17, 2022, giving plainffs thirty days to amend their complaint. On November 16, 2022, plainffs filed an amended consolidated complaint, asserng
the same claims and seeking the same relief as the consolidated complaint. On January 18, 2023, defendants moved to dismiss the amended consolidated
complaint in its enrety. Briefing on defendants’ moon to dismiss the amended consolidated complaint was completed on April 5, 2023 and oral argument
was  held  on  March  13,  2024.  At  the  conclusion  of  the  hearing,  the  Court  granted  our  moon  to  dismiss.  In  connecon  with  any  ligaon  or  other  legal
proceedings, we could incur substanal costs, and such costs and any related selements or judgments may not be covered by insurance. Monetary damages
or any other adverse judgment would have a material adverse effect on our business and financial posion. In addion, if other resoluon or acons taken as
a  result  of  legal  proceedings  were  to  restrain  our  ability  to  operate  or  market  our  products  and  services,  our  consolidated  financial  posion,  results  of
operaons or cash flows could be materially adversely affected. We could also suffer an adverse impact on our reputaon, negave publicity and a diversion
of management’s aenon and resources, which could have a material adverse effect on our business.

Risks Related to our Common Stock

Our stock price has been and may connue to be volale, which could result in substanal losses for holders or future purchasers of our common stock and
lawsuits against us and our officers and directors.

Our stock price has been and will likely connue to be volale. The stock market in general and the market for similarly situated biopharmaceucal companies
specifically have experienced extreme volality that has oen been unrelated to the operang performance of parcular companies, such as rising inflaon
and increasing interest rates. Since our inial public offering in March 2014, the price of our common stock as reported on The Nasdaq Stock Market has
ranged from a low of $0.24 on October 24, 2022 to a high of $31.00 on June 20, 2014. The daily closing market price for our common stock varied between a
high price of $1.84 on August 1, 2023 and a low price of $0.51 on April 5, 2023 in the twelve-month period ending on December 31, 2023. During that me,
the price of our common stock ranged from an intra-day low of $0.49 per share to an intra-day high of $1.84 per share. The market price of shares of our
common stock could be subject to wide fluctuaons in response to many risk factors listed in this secon, including, among others, developments related to
and results of our research or clinical trials, developments related to our regulatory submissions and meengs with regulatory authories, in parcular as it
relates  to  vadadustat,  commercializaon  of  Auryxia,  vadadustat  in  Europe  and,  if  and  as  approved  in  the  U.S.  and  other  foreign  markets,  and  any  other
product  candidates,  announcements  by  us  or  our  competors  of  significant  transacons  or  strategic  collaboraons,  negave  publicity  around  Auryxia  or
vadadustat, regulatory or legal developments in the U.S. and other countries, developments or disputes concerning our intellectual property, the recruitment
or departure of key personnel including as a result of our reducons in workforce, actual or ancipated changes in esmates as to financial results, changes in
the structure of healthcare payment systems, market condions in the biopharmaceucal sector, potenal delisng from The Nasdaq Stock Market and other
factors beyond our control. As a result of this volality, our stockholders may not be able to sell their common stock at or above the price at which they
purchased it.

In  addion,  companies  that  have  experienced  volality  in  the  market  price  of  their  stock  have  frequently  been  the  subject  of  securies  class  acon  and
shareholder derivave ligaon. See Part I, Item 3. Legal Proceedings of this Form 10-K for informaon concerning securies class acon iniated against
Keryx and certain current and former directors and officers of ours and Keryx’s. In addion, we could be the target of other such ligaon in the future. Class
acon and shareholder derivave lawsuits, whether successful or not, could result in substanal costs, damage or selement awards and a diversion of our
management’s resources and aenon from running our business, which could materially harm our reputaon, financial condion and results of operaons.

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The  issuance  of  addional  shares  of  our  common  stock  or  the  sale  of  shares  of  our  common  stock  by  any  of  our  directors,  officers  or  significant
stockholders will dilute our stockholders’ ownership interest in Akebia and may cause the market price of our common stock to decline.

Most of our outstanding common stock can be traded without restricon at any me. As such, sales of a substanal number of shares of our common stock in
the public market could occur at any me. These sales, or the percepon in the market that the holders of a large number of shares intend to sell such shares,
could reduce the market price of our common stock.

As of December 31, 2023 and based on the amounts reported in the most recent filings made under Secon 13(d) and 13(g) of the Exchange Act, Muneer A.
Saer, or Saer, beneficially owned approximately 8.3% of our outstanding shares of common stock, the Vanguard Group, or Vanguard, beneficially owned
approximately 4.0% of our outstanding shares of common stock, and CSL Vifor beneficially owned approximately 4% of our outstanding shares of common
stock. By selling a large number of shares of common stock, Saer or Vanguard could cause the price of our common stock to decline. The shares beneficially
owned  by  CSL  Vifor  have  not  been  registered  pursuant  to  the  Securies  Act  and  were  issued  and  sold  in  reliance  upon  the  exempon  from  registraon
contained in Secon 4(a)(2) of the Securies Act and Rule 506 promulgated thereunder, but if they are registered in the future, those shares would become
freely tradable and, if a large poron of such shares are sold, could cause the price of our common stock to decline.

In addion, we entered into a warrant agreement with Kreos Capital VII Aggregator SCSp, an affiliate of Kreos, or the Warrant Holder, pursuant to which (i) we
issued  a  warrant  to  the  Warrant  Holder  to  purchase  3,076,923  shares  of  our  common  stock,  at  an  exercise  price  per  share  of  $1.30  (subject  to  standard
adjustments for stock splits, stock dividends, rights offerings and pro rata distribuons), or the Exercise Price, and (ii) if we drawdown the Tranche C Loan, at
that  me  we  will  issue  a  warrant  to  the  Warrant  Holder  to  purchase  1,153,846  shares  of  our  common  stock,  at  an  exercise  price  per  share  equal  to  the
Exercise Price. Each warrant is exercisable for eight years from date of issuance. If any or all of the warrants are exercised, our stockholders could realize
diluon, and the value of their shares could decrease.

We have a significant number of shares that are subject to outstanding opons and restricted stock units, and in the future we may issue addional opons,
restricted stock units, or other derivave securies converble into our common stock. The exercise or vesng of any such opons, restricted stock units, or
other derivave securies, and the subsequent sale of the underlying common stock, could cause a further decline in our stock price. These sales also might
make it difficult for us to sell equity securies in the future at a me and at a price that we deem appropriate. Such sales of our common stock could result in
higher than average trading volume and may cause the market price for our common stock to decline.

Sales  of  substanal  amounts  of  shares  of  our  common  stock  or  other  securies  by  our  employees  or  our  other  stockholders  or  by  us  under  any  shelf
registraon statement, pursuant to at-the-market offerings or otherwise, could dilute our stockholders, lower the market price of our common stock and
impair our ability to raise capital through the sale of equity securies.

Our execuve officers, directors and principal stockholders maintain the ability to significantly influence all maers submied to stockholders for approval.

As of December 31, 2023, our execuve officers, directors and principal stockholders, in the aggregate, beneficially owned shares represenng a significant
percentage of our capital stock. As a result, if these stockholders were to choose to act together, they would be able to significantly influence all maers
submied to our stockholders for approval, as well as our management and affairs. For example, these persons could significantly influence the elecon of
directors and approval of any merger, consolidaon or sale of all or substanally all of our assets. This concentraon of vong power could delay or prevent
an acquision of our Company on terms that other stockholders may desire.

Provisions in our organizaonal documents and Delaware law may have an-takeover effects that could discourage an acquision of us by others, even if
an acquision would be beneficial to our stockholders, and may prevent aempts by our stockholders to replace or remove our current management.

Provisions in our Charter and our Bylaws contain provisions that may have the effect of discouraging, delaying or prevenng a change in control of us or
changes in our management. These provisions could also limit the price that investors might be willing to pay in the future for shares of our common stock,
thereby depressing the market price of our common stock. In addion, because our Board of Directors is responsible for appoinng certain members of our
management team, these provisions may frustrate or prevent any aempts by our stockholders to replace or remove our current management by making it
more difficult for stockholders to replace members of our Board of Directors. Among other things, these provisions:

•

•

•

authorize  “blank  check”  preferred  stock,  which  could  be  issued  by  our  Board  of  Directors  without  stockholder  approval  and  may  contain  vong,
liquidaon, dividend and other rights superior to our common stock;

create a classified Board of Directors whose members serve staggered three-year terms;

specify that special meengs of our stockholders can be called only by our Board of Directors pursuant to a resoluon adopted by a majority of the
total number of directors;

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•

•

•

•

•

•

prohibit stockholder acon by wrien consent;

establish an advance noce procedure for stockholder approvals to be brought before an annual meeng of our stockholders, including proposed
nominaons of persons for elecon to our Board of Directors;

provide that our directors may be removed only for cause;

provide that vacancies on our Board of Directors may be filled only by a majority of directors then in office, even though less than a quorum;

require a supermajority vote of 75% of the holders of our capital stock entled to vote or the majority vote of our Board of Directors to amend our
Bylaws; and

require a supermajority vote of 85% of the holders of our capital stock entled to vote to amend the classificaon of our Board of Directors and to
amend certain other provisions of our Charter.

These provisions, alone or together, could delay or prevent hosle takeovers, changes in control or changes in our management.

In addion, Secon 203 of the DGCL prohibits a publicly-held Delaware corporaon from engaging in a business combinaon with an interested stockholder,
generally a person which together with its affiliates owns, or within the last three years has owned, 15% of our vong stock, for a period of three years aer
the date of the transacon in which the person became an interested stockholder, unless the business combinaon is approved in a prescribed manner.

Because we do not ancipate paying any cash dividends on our capital in the foreseeable future, capital appreciaon, if any, will be our stockholders’ sole
source of gain.

We  have  never  declared  or  paid  cash  dividends  on  our  capital  stock  and  we  currently  intend  to  retain  all  of  our  future  earnings,  if  any,  to  finance  the
development and growth of our business. Any payment of cash dividends in the future would be at the discreon of our Board of Directors and would depend
on, among other things, our earnings, financial condion, capital requirements, level of indebtedness, statutory and contractual restricons applying to the
payment  of  dividends  and  other  consideraons  that  the  Board  of  Directors  deems  relevant.  In  addion,  the  terms  of  the  BlackRock  Credit  Agreement
preclude us from paying cash dividends without prior wrien consent of the lender and future debt agreements may preclude us from paying cash dividends.
As a result, capital appreciaon, if any, of our common stock will be our stockholders’ sole source of gain for the foreseeable future.

Item 1B. Unresolved Staff Comments

None.

Item 1C. Cybersecurity.

Cybersecurity Risk Management and Strategy

We have certain processes for assessing, idenfying, and managing material risks from cybersecurity threats, which are integrated into our enterprise risk
management processes. Specifically, we have processes for:

•

•

•

Idenfying and Managing Cybersecurity Risks — We have implemented a cross-funconal approach to assessing, idenfying and managing material
cybersecurity  threats  and  incidents.  We  periodically  review,  assess,  update  and  test  our  policies,  standards,  processes  and  pracces  in  a  manner
intended  to  address  cybersecurity  threats  and  events.  The  results  of  such  reviews,  assessments  and  tests  are  evaluated  by  management  and
reported to our Audit Commiee of the Board of Directors, or the Audit Commiee, and our Board of Directors.

Technical  Safeguards  —  We  have  integrated  cybersecurity  into  our  overall  informaon  technology  operaons  and  designed  our  processes  and
systems to help protect our informaon assets and operaons from internal and external cyber threats, protect employee and paent informaon
from unauthorized access or aack as well as secure our networks and systems.

Incident Response and Recovery Planning — To beer facilitate our cybersecurity program, our cybersecurity team works collaboravely across our
Company to implement programs designed to protect our informaon systems from cybersecurity threats and to promptly respond to any material
cybersecurity incidents. We conduct regular tabletop exercises, including incident simulaons to test these plans and ensure personnel are familiar
with their roles and responsibilies in a response scenario.

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•

•

Third-Party Risk Management — We maintain a risk-based approach to idenfying and overseeing material cybersecurity threats presented by third
pares and the systems of third pares that could adversely impact our business in the event of a material cybersecurity incident affecng those
third-party systems.

Educaon and Awareness — We provide training regarding cybersecurity threats as a means to equip our employees and consultants with tools to
make  employees  and  consultants  aware  of  and  to  address  cybersecurity  threats,  and  to  communicate  our  evolving  informaon  security  policies,
standards,  processes  and  pracces.  We  also  use  technology-based  tools  to  migate  cybersecurity  risks  and  to  bolster  our  employee-based
cybersecurity programs.

We adjust our cybersecurity policies, standards, processes, and pracces as necessary based on the informaon provided by our assessments, audits and
reviews. Such processes include (i) procedural and technical safeguards, (ii) response plans, (iii) annual tests on our systems, (iv) incident simulaons and (v)
roune review of our cybersecurity policies and procedures to idenfy risks and improve our pracces. We engage certain external cybersecurity firms to
enhance our cybersecurity oversight. We include confidenality provisions in all contracts with third-party service providers, and data protecon provisions in
certain contracts with third-party service providers where applicable, to help protect us and our employees and paents from any related vulnerabilies.

Governance

Our Board of Directors is responsible for exercising oversight of management’s idenficaon and management of, and planning for, risks from cybersecurity
threats. While the full Board of Directors has overall responsibility for risk oversight, the Board of Directors has delegated oversight responsibility related to
risks from cybersecurity threats to the Audit Commiee. The Audit Commiee reports to the Board of Directors at least annually, and nofies the Board of
Directors as necessary regarding significant new cybersecurity threats or incidents. The Audit Commiee of our Board of Directors meets annually to discuss
our approach to overseeing cybersecurity threats with management, including with members of our internal cybersecurity team.

We  use  an  internal  management  commiee  to  run  our  informaon  and  technology  team  and  our  informaon  and  technology  team  includes  our
cybersecurity  team  lead  who  has  served  in  various  roles  in  informaon  technology  and  informaon  security  for  over  25  years,  including  at  other  public
companies.  Through  ongoing  communicaons  with  this  management  commiee,  senior  management  is  informed  about  and  monitors  the  prevenon,
detecon,  migaon  and  remediaon  of  cybersecurity  threats  and  incidents  in  real-me  and  reports  such  threats  and  incidents  to  the  Audit  Commiee,
when  appropriate.  Management  updates  the  Audit  Commiee  quarterly  with  an  overview  of  our  cybersecurity  threat  risk  management  and  strategy
processes. Members of the Audit Commiee are also encouraged to regularly engage in ad hoc conversaons with management on cybersecurity-related
topics  and  discuss  any  updates  to  our  cybersecurity  risk  management  and  strategy  programs.  The  Audit  Commiee  is  nofied  between  such  updates
regarding significant new cybersecurity threats or incidents that meet pre-established reporng thresholds and any ongoing updates regarding any risk, as
needed.

We have not idenfied any risks from cybersecurity threats, including as a result of any previous cybersecurity incidents, that have materially affected or are
reasonably likely to materially affect our company, including our business strategy, results of operaons or financial condion. However, as discussed under
“Risk Factor — Risks Related to our Business and Managing Growth” in Part I, Item 1A of this Form 10-K, cybersecurity threats could pose mulple risks to us.
As cybersecurity threats become more frequent, sophiscated, and coordinated, it is reasonably likely that we will be required to expend greater resources to
connue to modify and enhance our protecve measures.

Item 2. Properes

We  currently  lease  approximately  65,167  square  feet  of  office,  storage  and  laboratory  space  in  Cambridge,  Massachuses,  which  is  our  corporate
headquarters. Excluding renewal opons, the lease for our Cambridge, Massachuses office and storage space expires on September 11, 2026 and the lease
for  our  laboratory  space  expires  on  January  31,  2025.  In  the  third  quarter  of  2022,  as  a  result  of  the  reducons  in  our  workforce  and  our  transion  to
primarily hybrid and remote work schedules, we ceased using two-thirds of the office space, and began to market up to 59,216 square feet of furnished office
space for sublease. We believe our exisng facilies are adequate to meet our operaonal needs.

Item 3. Legal Proceedings

Opposion Proceedings Against Akebia

In September 2018, Dr. Reddy’s Laboratories Limited filed an opposion to our issued Indian Patent No. 287720 in the Indian Patent Office.

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On July 26, 2022, Sandoz AG filed an opposion against our issued European Patent No. 3277270 in the European Patent Office, or the EPO. During an oral
proceeding held on February 6, 2024, the EPO's Opposion Division rejected the opposion and upheld the patent as granted.

Seled Opposion Proceedings Against Akebia

On February 13, 2023, FibroGen, Inc., or FibroGen, filed an opposion against our issued European Patent No. 3357911, or the ’911 EP Patent, in the EPO. On
November  21,  2023,  we  and  our  collaboraon  partner  in  Japan,  Mitsubishi  Tanabe  Pharma  Corporaon,  or  MTPC,  entered  into  a  Selement  and  Cross
License Agreement, or the Selement Agreement, with FibroGen and its collaboraon partner in Europe and Japan, Astellas Pharma Inc., or Astellas.  This
Selement Agreement resolves all patent disputes between Akebia, MTPC, FibroGen and Astellas in the EU, the contracng states to the European Patent
Convenon, the UK, and Japan with no cash payment. On November 22, 2023, FibroGen withdrew the opposion against the ’911 EP Patent pursuant to the
terms of the Selement Agreement.

Seled Proceedings Filed by Akebia Against FibroGen

Europe

We filed an opposion in the EPO against FibroGen’s European Patent No. 1463823, or the ’823 EP Patent on December 5, 2013, and an oral proceeding took
place March 8 and 9, 2016. Following the oral proceeding, the Opposion Division of EPO ruled that the patent as granted did not meet the requirements for
patentability  under  the  European  Patent  Convenon  and,  therefore,  revoked  the  patent  in  its  enrety.  FibroGen  appealed  that  decision.  On  February  27,
2023, FibroGen withdrew its appeal, and the patent remains revoked.

On April 3, 2019, we filed opposions to FibroGen’s European Patent Nos. 2289531, or the ’531 EP Patent, and 2298301, or the ’301 EP Patent in the EPO,
respecvely, requesng the patents be revoked in their enrety. Oral proceedings for opposions to the two patents were held on September 7, 8 and 10,
2021. Following oral proceedings, the Opposion Division of the EPO maintained certain claims in amended form in the two patents. On January 26, 2022, we
filed noce to appeal the Opposion Division’s decision for ’531 EP Patent. On July 8, 2022, FibroGen filed noce to appeal the Opposion Division’s decision
for the ’301 EP Patent, which it withdrew on August 17, 2022. On November 21, 2023, we withdrew our appeal to the Opposion Division’s decision for ’531
EP Patent pursuant to the terms of the Selement Agreement.

Japan

In 2018, we and MTPC jointly filed a Request for Trial before the Japan Patent Office, or JPO  to  challenge  the  validity  of  certain  of  FibroGen’s  HIF-related
patents in Japan: JP4845728, JP5474872 and JP5474741. On September 26, 2019, the JPO conducted an invalidaon trial for JP5474872 and JP4845728. On
November 11, 2019, the JPO conducted an invalidaon trial for JP5474741. On April 1, 2022, the JPO issued a final decision for JP4845728, which invalidated
all claims except claims directed to the medical use to treat anemia that does not respond to erythropoiesis. On May 18, 2022, the JPO issued a final decision
for  JP5474741  and  JP5474872,  which  maintained  the  claims  in  amended  form.  In  May  2022,  MTPC  filed  revocaon  lawsuits  for  the  three  patents  in  the
Intellectual Property High Court requesng cancellaon of the JPO’s decisions. In July 2022, we filed a revocaon lawsuit for JP4845728 in the Intellectual
Property  High  Court  requesng  cancellaon  of  the  JPO’s  decision.  In  August  2022,  we  filed  revocaon  lawsuits  for  JP5474741  and  JP5474872  in  the
Intellectual Property High Court requesng cancellaon of the JPO’s decisions. In September 2022, FibroGen filed a revocaon lawsuit for JP4845728 in the
Intellectual  Property  High  Court  requesng  cancellaon  of  the  JPO’s  decision  on  the  claims  that  were  invalidated.  In  November  2023,  Akebia,  MTPC,  and
FibroGen filed with the Japan Intellectual High Court wrien consent to withdraw the revocaon lawsuits related to JP4845728, JP5474872 and JP5474741
pursuant to the terms of the Selement Agreement.

United Kingdom

On December 13, 2018, we filed Parculars of Claim in the Patents Court of the United Kingdom to challenge the validity of FibroGen’s six HIF-related patents
in the UK: the ’823 EP Patent (UK), European Patent (UK) No. 1633333, or the ’333 EP Patent (UK), European Patent (UK) No. 2322153, or the ’153 EP Patent
(UK), European Patent (UK) No. 2322155, or the ’155 EP Patent (UK), European Patent (UK) No. 2,289,531, or the ’531 EP Patent (UK), and European Patent
(UK)  No.  2,298,301,  or  the  ’301  EP  Patent  (UK).  In  May  2019,  Astellas,  the  exclusive  licensee  of  FibroGen’s  HIF-related  patents,  sued  Akebia  for  patent
infringement  in  the  Patents  Court  of  the  UK.  In  September  2019,  we  filed  an  Amended  Parculars  of  Claim  to  include  FibroGen’s  European  Patent  No.
1487472, or the ’472 EP Patent (UK). On February 28, 2020, the pares agreed to dismiss the ’472 EP Patent (UK) from the trial.

A trial was conducted in March 2020. On April 20, 2020, the Patents Court of the UK issued a judgment in favor of Akebia, which invalidated all the claims at
issue in each of the ’823 EP Patent (UK), the ’333 EP Patent (UK), the ’153 EP Patent (UK), the ’155 EP Patent (UK) and the ’301 EP Patent (UK). The ’531 EP
Patent (UK) was amended to a single claim to recite one specific compound; this claim was held to be valid but not infringed by vadadustat. On June 11, 2020,
FibroGen and Astellas appealed the Patents Court’s judgment on the invalidity of the ’823 EP Patent (UK), the ’301 EP Patent (UK), the ’333 EP

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Patent (UK), the ’153 EP Patent (UK), and the ’155 EP Patent (UK) in the Court of Appeal (Civil Division). On June 8, 2021 - June 10, 2021, the United Kingdom
Court of Appeal held a three-day hearing for the appeal. On August 24, 2021, the Court of Appeal issued a judgment, which reversed the Patents Court’s
judgment on the invalidity of the ’823 EP Patent (UK) and maintained certain claims of the ’823 EP Patent (UK) and the ’301 EP Patent (UK) in amended form,
and which affirmed the Patents Court’s judgment on the invalidity of the ’333 EP Patent (UK), the ’155 EP Patent (UK), and the ’153 EP Patent (UK). Akebia
sought permission to appeal to the UK Supreme Court, which was granted on October 3, 2022. On November 28, 2023, we filed an applicaon for withdrawal
of the Appeal at the UK Supreme Court pursuant to the terms of the Selement Agreement. On December 15, 2023, the UK Supreme Court ordered that the
Appeal be withdrawn.

Legal Proceedings Relang to Auryxia

Stockholder Ligaon Relang to the Merger

On June 28, 2018, we entered into an Agreement and Plan of Merger with Keryx and Alpha Therapeucs Merger Sub, Inc., or the Merger Sub, pursuant to
which  the  Merger  Sub  merged  with  and  into  Keryx,  with  Keryx  becoming  a  wholly  owned  subsidiary  of  ours,  or  the  Merger.  On  December  12,  2018,  we
completed the Merger.

On July 15, 2021, a purported former Keryx stockholder filed a putave class acon in the Supreme Court of the State of New York against Akebia, a current
officer  of  Akebia  (John  P.  Butler),  a  former  officer  of  Akebia  (Jason  A.  Amello),  former  directors  of  Akebia  (Muneer  A.  Saer,  Sco  A.  Canute,  Michael  D.
Clayman,  Maxine  Gowen,  Duane  Nash,  Ronald  C.  Renaud,  Jr.,  and  Michael  S.  Wyzga),  a  current  director  of  Akebia  (Cynthia  Smith),  a  former  director  and
officer of Keryx (Jodie P. Morrison), a former officer of Keryx (Sco A. Holmes) and former directors of Keryx (Michael Rogers, Kevin J. Cameron, Steven C.
Gilman, Daniel P. Regan, Mark J. Enyedy, and Michael T. Heffernan, some of whom are current members of our Board of Directors). The acon is caponed
Loper v. Akebia Therapeucs, Inc., et al., or the Loper Acon. The complaint in the Loper Acon alleges that the registraon statement filed in connecon
with the Merger contained allegedly false and misleading statements or failed to disclose certain allegedly material informaon in violaon of Secon 11,
12(a)(2), and 15 of the Securies Act of 1933, as amended. It alleges, among other things, that Akebia failed to disclose heightened safety risks that allegedly
threatened the prospects of the Phase 3 PRO2TECT clinical trial and the commercial viability of vadadustat. The complaint in the Loper Acon seeks damages
including interest thereon, an award of plainffs’ and the class’s costs and expenses, including counsel fees and expert fees, and rescission, disgorgement, or
such other equitable or injuncve relief that the Court deems appropriate.

On August 16, 2021, another purported former Keryx stockholder filed a putave class acon making substanally similar allegaons and asserng the same
claims as the Loper Acon, also in the Supreme Court of the State of New York against Akebia and many of the same individual defendants named in the
Loper Acon. The acon is caponed Panicho v. Akebia Therapeucs, Inc., et al., or the Panicho Acon.

On  September  13,  2021,  the  pares  in  the  Loper  Acon  and  Panicho  Acon  entered  into  a  joint  spulaon  and  proposed  order,  which  provided  for  the
consolidaon of the two acons under the capon In re Akebia Therapeucs, Inc. Securies Ligaon, or the Consolidated State Acon. On October 27, 2021,
plainffs filed a consolidated complaint in the Consolidated State Acon. On January 10, 2022, defendants moved to dismiss the consolidated complaint in its
enrety. Briefing on defendants’ moon to dismiss was completed on April 22, 2022. Oral argument was held on October 7, 2022, and the Court dismissed
the  complaint  without  prejudice  on  October  17,  2022,  giving  plainffs  thirty  days  to  amend  their  complaint.  On  November  16,  2022,  plainffs  filed  an
amended consolidated complaint, asserng the same claims and seeking the same relief as the consolidated complaint. On January 18, 2023, defendants
moved  to  dismiss  the  amended  consolidated  complaint  in  its  enrety,  and  the  plainffs  filed  their  opposion  on  March  6,  2023.  Briefing  on  defendants’
moon to dismiss the amended consolidated complaint was completed on April 5, 2023. Oral argument was held on March 13, 2024. At the conclusion of the
hearing, the Court granted our moon to dismiss.

We  deny  any  allegaons  of  wrongdoing  and  intend  to  connue  vigorously  defending  against  the  one  acve  stockholder  lawsuit  described  in  this  Legal
Proceedings secon, the Consolidated State Acon. There is no assurance, however, that we will be successful in the defense of this acon, or any associated
appeals, or that insurance will be available or adequate to fund any selement or judgment or the ligaon costs of this acon. Moreover, we are unable to
predict the outcome or reasonably esmate a range of possible losses at this me. A resoluon of the Consolidated State Acon in a manner adverse to us,
however, could have a material effect on our financial posion and results of operaons in the period in which the acon is resolved.

Seled ANDA Ligaon

In February 2023, we received a Paragraph IV cerficaon noce leer regarding an Abbreviated New Drug Applicaon, or ANDA, submied to the U.S. Food
and Drug Administraon, or FDA, by Zydus Worldwide DMCC requesng approval for a generic version of Auryxia tablets (210 mg ferric iron per tablet). On
March  24,  2023,  we  and  Panion  &  BF  Biotech,  Inc.,  or  Panion,  filed  a  complaint  for  patent  infringement  against  Zydus  Worldwide  DMCC,  Zydus
Pharmaceucals (USA) Inc., and Zydus Lifesciences Limited, or collecvely Zydus, in the United States District Court for the District of Delaware arising from

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Zydus’ ANDA filing with the FDA. On May 30, 2023, we and Panion entered into a selement and license agreement with Zydus, which resolved the patent
ligaon brought by we and Panion. Such selement and license agreement, consistent with our prior ANDA selements, granted Zydus a license to market a
generic version of Auryxia in the U.S. beginning on March 20, 2025 (subject to FDA approval), or earlier under certain circumstances customary for selement
agreements of this nature. Addionally, in accordance with the selement and license agreement, the pares terminated all ongoing ligaon among us,
Panion  and  Zydus  regarding  Auryxia  patents  pending  in  the  Delaware  District  Court.  The  selement  and  license  agreement  is  confidenal  and  subject  to
review by the U.S. Federal Trade Commission and the U.S. Department of Jusce. On June 5, 2023, the Delaware District Court entered a spulaon and order
of dismissal filed by the pares to terminate the acon against Zydus.

Item 4. Mine Safety Disclosures

Not applicable.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Maers and Issuer Purchases of Equity Securies

Market Informaon

Our common stock is traded on The Nasdaq Capital Market under the symbol “AKBA”.

Holders

At March 12, 2024, there were approximately 30 holders of record of our common stock. The number of record holders is based upon the actual number of
holders registered on our books at such date and does not include shares held in street name by brokers or other nominees, and shares held by persons,
partnerships, associaons, corporaons or other enes whose shares are held by depository trust companies.

Dividends

We  have  never  declared  or  paid  any  cash  dividends  on  our  common  stock  and  we  do  not  ancipate  paying  cash  dividends  in  the  foreseeable  future.  In
addion, the terms of our BlackRock Credit Agreement preclude us from paying cash dividends without prior wrien consent and future debt agreements
may preclude us from paying cash dividends.

Issuer Purchases of Equity Securies

None.

Recent Sales of Unregistered Securies

None.

Purchases of Equity Securies by the Issuer and Affiliated Purchasers

None.

Comparave Stock Performance Graph

We are a smaller reporng company, as defined by Rule 12b-2 of the Exchange Act, and are not required to provide a stock performance graph.

Securies Authorized for Issuance under Equity Compensaon Plans

Informaon  about  our  equity  compensaon  plans  is  incorporated  herein  by  reference  to  Item  12,  Security  Ownership  of  Certain  Beneficial  Owners  and
Management and Related Stockholder Maers, of this Form 10-K.

Item 6. [Reserved]

Item 7. Management’s Discussion and Analysis of Financial Condion and Results of Operaons

This Annual Report on Form 10-K, or Form 10-K, including this management's discussion and analysis of financial condion and results of operaons, contains
forward-looking statements based upon current expectaons that involve risks and uncertaines. Our actual results may differ materially from those described
in or implied in these forward-looking statements as a result of various factors, including those factors set forth in the “Risk Factors” secon included in Part I,
Item 1A of this Form 10-K. All references to years, unless otherwise noted, refer to our fiscal years, which end on December 31. For purposes of this secon, all
references to “we,” “us,” “our,” “Akebia,” or the “Company” refer to Akebia Therapeucs, Inc. and its consolidated subsidiaries.

The following discussion and analysis should also be read in conjuncon with the accompanying audited consolidated financial statements and related notes
included in Part II, Item 8 of this Form 10-K. This secon discusses 2023 and 2022 financial condion, and results of operaons and year-to-year comparisons
between 2023 and 2022. For discussion of 2022 items and year-over-year comparisons between 2022 and 2021 that are not included in this 2023 Form 10-K,
refer to “Item 7. – Management’s Discussion and Analysis of Financial Condion and Results of Operaons” found in our Form 10-K/A for the year ended
December 31, 2022, that was filed with the Securies and Exchange Commission on August 28, 2023.

Business Overview

We are a fully integrated commercial-stage biopharmaceucal company commied to addressing paents’ unmet needs. We have built a business focused on
developing and commercializing innovave therapeucs that we believe serves as a foundaon for future growth. Our purpose is to beer the life of each
person impacted by kidney disease, and we have established ourselves as a leader in the kidney community. We believe our demonstrated ability to deliver
value broadly to the kidney community has enabled us to build a sustainable company. Upon this solid foundaon and our connued

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commitment to paents, we believe focusing on all paents who can realize a meaningful benefit from our medicines, will result in delivering value for our
shareholders.

Our current porolio includes:

•

•

Auryxia®  (ferric  citrate)  is  an  an  orally  administered  medicine  approved  and  marketed  in  the  United  States,  or  U.S.,  for  two  indicaons:  (1)  the
control  of  serum  phosphorus  levels  in  adult  paents  with  dialysis  dependent  chronic  kidney  disease,  or  DD-CKD,  and  (2)  the  treatment  of  iron
deficiency anemia, or IDA, in adult paents with non-dialysis-dependent chronic kidney disease, or NDD-CKD. Today, we market Auryxia in the U.S.
with  our  well-established,  nephrology-focused  commercial  organizaon.  Our  Japanese  sublicensee,  Japan  Tobacco,  Inc.,  and  its  subsidiary,  Torii
Pharmaceucal Co., Ltd., collecvely, JT and Torii,  commercialize  ferric  citrate  hydrate  as  Riona  in  Japan.  Averoa  SAS,  or  Averoa,  has  an  exclusive
license to develop and commercialize ferric citrate in the European Economic Area, or EEA, Turkey, Switzerland and the United Kingdom, or UK. We
expect Averoa will apply for markeng authorizaon for ferric citrate in Europe.

Vafseo™ (vadadustat) is an oral hypoxia-inducible factor prolyl hydroxylase, or HIF-PH, inhibitor, approved in 36 countries as a treatment for anemia
due to CKD. In the European Union, or EU, the UK, Switzerland and Australia, vadadustat is approved under the trade name Vafseo for the treatment
of symptomac anemia associated with chronic kidney disease, or CKD, in adults on chronic maintenance dialysis. In May 2023, we entered into a
License  Agreement  with  MEDICE  Arzneimiel  Püer  GmbH  &  Co.  KG,  or  Medice,  pursuant  to  which  we  granted  Medice  an  exclusive  license  to
develop and commercialize vadadustat for the treatment of anemia in paents with CKD in the EEA, the UK, Switzerland and Australia, or the Medice
Territory. In Japan, vadadustat is approved as a treatment for anemia due to CKD in both dialysis dependent and non-dialysis dependent paents
under the trade name Vafseo, and is marketed and sold by our collaborator Mitsubishi Tanabe Pharma Corporaon, or MTPC. In Taiwan, vadadustat
is  approved  for  the  treatment  of  symptomac  anemia  due  to  CKD  in  adult  paents  on  chronic  maintenance  dialysis  and  in  Korea  as  an  anemia
treatment  for  paents  with  CKD  on  hemodialysis.  MTPC  plans  to  commercialize  vadadustat  in  Taiwan.  We  connue  to  pursue  approval  for
vadadustat in the U.S., and in September 2023, we completed our resubmission to our New Drug Applicaon, or NDA, for the treatment of anemia
due  to  CKD  for  dialysis  dependent  paents  to  the  U.S.  Food  and  Drug  Administraon,  or  FDA.  In  October  2023,  the  FDA  acknowledged  that  the
resubmission was complete, classified it as a Class 2 response and set a user fee goal date, or PDUFA Date, of March 27, 2024. Beyond seeking U.S.
approval,  we  have  several  lifecycle  management  and  indicaon  expansion  opportunies  currently  under  evaluaon  for  vadadustat,  including  the
potenal for alternave dosing and label expansion for treatment of adult paents not on dialysis.

• Our  HIF-based  pipeline  assets  are  molecules  being  evaluated  to  target  areas  of  unmet  needs  in  acute  care  sengs.  The  discovery  of  hypoxia-
inducible  factor,  or  HIF,  laid  the  foundaon  to  explore  the  central  role  of  oxygen  sensing  in  many  diseases.  As  we  have  seen  through  the
development of vadadustat as a treatment for anemia due to CKD, when stabilized, HIF triggers wide-ranging adapve, protecve responses during
hypoxic  or  ischemic  condions.  We  have  selected  two  addional HIF  molecules  for  preclinical  development:  AKB-9090,  for  use  in  an  acute  care
seng, potenally for acute kidney disease, or AKI, or acute respiratory distress syndrome, or ARDS, and AKB-10108 for renopathy of prematurity,
or ROP, in neonates.

We  connue  to  explore  addional  commercial  and  development  opportunies  to  expand  our  pipeline  and  porolio  of  novel  therapeucs  through  both
internal research and external innovaon to leverage our fully integrated team.

Factors Affecng Our Performance and Results of Operaon

Financial Highlights

Net product revenue in 2023 decreased by approximately 4% to $170.3 million from $176.9 million in 2022, primarily due to a decrease in Auryxia product
volume parally offset by increases in pricing, improved payor mix and execuon of our contracng strategy with third-party payors.

We have incurred net losses in each year since incepon. Our net losses were $51.9 million and $94.2 million for the years ended December 31, 2023 and
2022,  respecvely.  Substanally  all  of  our  net  losses  resulted  from  costs  incurred  in  connecon  with  the  connued  commercializaon  of  Auryxia  and
development  efforts  relang  to  vadadustat,  including  conducng  clinical  trials  of,  and  seeking  regulatory  approval  for,  vadadustat,  providing  general  and
administrave support for these operaons and protecng our intellectual property.

Financial Components

Product Revenue

We generate product revenue from commercial sales of Auryxia to a limited number of wholesale distributors as well as certain specialty pharmacy providers.
Our net product revenue includes many variables, including judgments and esmates of discounts, rebates and product returns, which can fluctuate from
quarter-to-quarter and year-over-year. We evaluate, at least

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annually and more frequently, if needed, the price of Auryxia, which will lose exclusivity, or LoE, in March 2025. We expect our product revenue to connue
to be generated primarily from our commercial sales of Auryxia.

Due to the buying paerns of our customers we tend to have seasonality from quarter to quarter. In general, our first quarter usually has lower revenues than
the preceding fourth quarter, the second and third quarters have higher revenues than the first quarter, and the fourth quarter revenues are the highest in
the year. While seasonality may affect quarterly comparisons within a fiscal year, it generally is not material to our annual consolidated results. However, we
expect Auryxia to be included in the ESRD bundle starng in January 2025, which coupled with Auryxia's LoE in March 2025 may impact the buying paerns
of our exisng customers during 2024, and therefore their buying paern in 2024 may be different than their historical pracces.

We believe the Centers for Medicare & Medicaid Services', or CMS, decision to include phosphate binders in the dialysis bundle could potenally lead to
higher sales of Auryxia aer the LoE date than in other LoE scenarios, and plan to work with payors and providers to seek to connue the use of Auryxia
beyond LoE.

License, Collaboraon and Other Revenue

License, collaboraon and other revenue includes revenue earned under collaboraon agreements, license fees, royalty payments and revenue from product
we supply under our license and supply agreements with our collaboraon partners.

We  expect  to  connue  to  generate  revenue  from  our  collaboraon  and,  if  applicable,  supply  agreements  with  Medice,  MTPC,  JT  and  Torii  and  any  other
collaboraons into which we have entered or may enter, including our collaboraon with Vifor (Internaonal) Ltd. (now a part of CSL Limited), or CSL Vifor, if
vadadustat is approved in the U.S.

In 2022, we recorded a nonrefundable, non-creditable terminaon fee pursuant to the terms of the Terminaon and Selement Agreement, or Terminaon
Agreement,  with  Otsuka  Pharmaceucal  Co.  Ltd,  or  Otsuka.  Furthermore,  in  2023  we  recorded  a  payment  received  from  Otsuka,  in  connecon  with  the
Packaging Validaon Transfer Agreement, to license, collaboraon and other revenue. Also in 2022, we recorded revenue from cost sharing agreements under
which we were reimbursed by our collaboraon partner for expenses incurred by us for research and development, or R&D, acvies and, may in the future
generate revenue from potenal co-promoon acvies, under our collaboraon agreements. We do not expect to recognize any future revenue under any
of our collaboraon agreements with Otsuka, which were terminated on June 30, 2022.

Cost of Goods Sold

Cost of goods sold, or COGS, - Cost of product and other revenue - COGS - Cost of product and other revenue includes costs closely correlated or directly
related  to  the  costs  to  manufacture  commercial  drug  substance  and  drug  product  for  Auryxia,  including  at  our  contract  manufacturing  organizaons,  or
CMOs, as well as indirect costs. Direct and indirect costs include fees for packaging, shipping, insurance and quality assurance, idle capacity charges, changes
in  reserves  for  excess  inventory,  write-offs  for  inventory  that  fails  to  meet  specificaons  or  is  otherwise  no  longer  suitable  for  commercial  sale,  including
scrap,  changes  in  our  firm  purchase  commitment  liability  and  royales  due  to  the  licensor  of  Auryxia  related  to  U.S.  and  Japan  product  sales  recognized
during the period.

COGS  also  includes  costs  to  manufacture  drug  product  provided  to  MTPC  and  Medice  for  commercial  sale  of  Vafseo  in  Japan  and  the  Medice  Territory,
respecvely, as well as personnel-related costs, including salaries and bonuses, employee benefits and stock-based compensaon aributable to employees
in parcular funcons and associated directly with the manufacturing of our commercial products.

Cost  of  product  and  other  revenue  for  a  newly  launched  product  does  not  include  the  full  cost  of  manufacturing  unl  the  inial  pre-launch  inventory  is
depleted  and  addional  inventory  is  manufactured  and  sold.  Unless  and  unl  we  receive  regulatory  approval  for  vadadustat,  in  the  U.S.  we  record  costs
incurred to manufacture the U.S. pre-launch inventory, such as raw materials, drug substance and drug product conversion costs as R&D, expense. Likewise,
the cost of product and other does not include the full cost of manufacturing unl the inial pre-launch inventory, for the supply of vadadustat product to
Medice which was previously expensed as R&D is depleted.

Cost of goods sold - Amorzaon of intangible asset - In addion, COGS includes the amorzaon of development product rights for Auryxia through the end
of 2024.

Research and Development Expenses

R&D expenses consist primarily of costs incurred for the development of vadadustat and costs associated with our pipeline which includes:

•

personnel-related expenses, including salaries, bonuses, employee benefits, stock-based compensaon and travel expenses for employees engaged
in R&D funcons;

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Table of Contents

•

•

•

•

•

•

•

costs associated with feasibility and potenal new manufacturing processes and methods for our commercial products;

regulatory registraon and related fees for non-commercial products;

expenses incurred under agreements with contract research organizaons, or CROs, and invesgave sites that conduct our clinical trials;

the cost of acquiring, developing and manufacturing clinical trial materials through contract manufacturing organizaons, or CMOs;

facilies, depreciaon and other expenses, which include direct and allocated expenses for rent and maintenance of facilies, insurance and other
supplies associated with our laboratory space as well as our R&D team;

costs associated with discovery and development for preclinical, clinical and regulatory acvies; and

costs associated with the pre-launch inventory build for vadadustat in the U.S., for which the FDA set a PDUFA date of March 27, 2024 for our NDA
resubmission, and in Europe prior to the European Commission, or EC, approval in April 2023.

R&D costs are expensed as incurred. Advance payments made for goods or services to be received in the future for use in R&D acvies are recorded as
prepaid expenses and other current assets. The prepaid amounts are expensed as the benefits are consumed. Costs for certain development acvies are
recognized based on an evaluaon of the progress to compleon of specific tasks using informaon and data provided to us by our vendors and our clinical
sites.

We cannot determine with certainty the duraon and compleon costs of our R&D projects, the costs of related clinical development, or if, when, or to what
extent we will generate revenue from the commercializaon or sale of any of our product candidates. In addion, we may never obtain markeng approval
for vadadustat in the U.S.

From  incepon  through  December  31,  2023,  we  have  incurred  $1.6  billion  in  R&D  expenses.  We  expect  to  incur  significant  R&D  expenditures  for  the
foreseeable  future  as  we  connue  the  development  of  Auryxia,  vadadustat  and  any  other  product  or  product  candidate,  including  those  that  may  be  in-
licensed or acquired.

A  significant  poron  of  our  R&D  costs  have  been  external  costs,  which  we  track  on  a  program-by-program  basis  as  well  as  costs  related  to  possible  new
manufacturing processes and methods associated with our commercial product. These external costs include fees paid to invesgators, consultants, central
laboratories and CROs in connecon with our clinical trials and costs related to acquiring and manufacturing clinical trial materials, including costs paid to
CMOs to manufacture clinical trial materials.

We do not track our internal personnel and facilies costs on a program-by-program basis as our personnel are deployed across mulple R&D projects.

Each of our products and product candidates has technical, clinical, regulatory, and commercial risk, including those discussed more fully under the heading
“Risk Factors” in Part I, Item 1A of this Form 10-K. A change in the outcome of any of the variables with respect to the development of Auryxia, vadadustat or
any other product or product candidate could result in a significant change in the costs and ming associated with that development.

Selling, General and Administrave Expenses

Selling,  general  and  administrave,  or  SG&A,  expenses  consist  primarily  of  compensaon  for  personnel,  including  stock-based  compensaon  related  to
commercial,  markeng,  execuve,  finance  and  accounng,  informaon  technology,  corporate  and  business  development  and  human  resource  funcons.
Other  SG&A  expenses  include  costs  for  markeng  iniaves  for  our  commercial  products,  market  research  and  analysis  on  our  commercial  product  and
potenal product candidates, conferences and trade shows, travel expenses, professional services fees (including legal, patent, accounng, audit, tax, and
consulng fees), insurance costs, general corporate expenses and allocated facilies-related expenses, including rent and maintenance of facilies.

License Expense

License expense relates to royales due to Panion & BF Biotech, Inc., or Panion, for sales of Auryxia in the U.S. and Riona in Japan.

Other Income (Expense), Net

Other income (expense), net consists primarily of interest income on our interest-bearing accounts, interest expense related to our term loans, accreon of
the debt discount on our term loans as well as changes in the fair value of our derivave liabilies, amorzaon of the discount on the liability related to the
terminaon fees associated with the terminaon agreement with BioVectra Inc., or BioVectra, entered into in December 2022, or the BioVectra Terminaon
Agreement, and the amorzaon of the discount and deferred gain related to our refund liability to CSL Vifor. See Note 10, Commitments and

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Table of Contents

Conngencies, in the accompanying notes to the consolidated financial statements included in Part II, Item 8 of this Form 10-K for further informaon on the
BioVectra Terminaon Agreement.

Recent Events

Borrowing Under BlackRock Term Loans and Repayment of Pharmakon Term Loans

On January 29, 2024, we entered into a secured term loan facility with Kreos Capital VII (UK) Limited, or Kreos, which are funds and accounts managed by
BlackRock  Inc.,  collecvely  BlackRock,  or  the  BlackRock  Credit  Agreement,  that  provides  for  an  aggregate  principal  amount  of  up  to  $55.0  million  made
available under the following three tranches:

(i) Tranche A — $37.0 million, drawn down on the closing date of the BlackRock Credit Agreement, of which we received $34.5 million, net of debt
issuance costs, fees and expenses and was used to repay our senior secured term loans, or the Pharmakon Term Loans, with Pharmakon Advisors LP, or
Pharmakon, of $35.0 million,

(ii) Tranche B — $8.0 million available in a single draw through December 31, 2024 and

(iii) Tranche C — $10.0 million available in a single draw through December 31, 2024.

Tranche B and C are only available subject to certain condions, including receipt of markeng approval for vadadustat from the FDA and, in the case of
Tranche C, receipt of a certain amount of cumulave gross cash proceeds from the sale of common stock.

On January 29, 2024, we also entered into a warrant agreement with Kreos Capital VII Aggregator SCSp, an affiliate of Kreos, pursuant to which we (i) issued a
warrant to purchase 3,076,923 shares of our common stock, at an exercise price per share of $1.30 (subject to standard adjustments for stock splits, stock
dividends, rights offerings and pro rata distribuons), or the Exercise Price, and (ii) will issue at the me of drawdown of the Tranche C Loan, if applicable, a
warrant to purchase 1,153,846 shares of our common stock, at the Exercise Price. Each warrant shall be exercisable for eight years from date of issuance.

See  Note  7,  Indebtedness,  in  the  accompanying  notes  to  the  consolidated  financial  statements  included  in  Part  II,  Item  8  of  this  Form  10-K  for  further
informaon.

At-the-Market (ATM) Offering

On  April  7,  2022,  we  entered  into  an  Open  Market  Sale  Agreement
,  or  Sales Agreement,  with  Jefferies  LLC  as  agent,  to  sell  up  to  $26.0  million  of  our
common stock at current market prices from me to me. During the quarter and year ended December 31, 2023, we sold 6,189,974 shares of common
stock under this program with net proceeds of $6.7 million, aer deducng commissions and other offering expenses. Including the amount sold during the
year ended December 31, 2023, through the date of the filing of this Form 10-K, we sold 19,451,285 shares of our common stock under the Sales Agreement
with net proceeds of $25.4 million, aer deducng commissions and other offering expenses.

SM

PDUFA Date - March 27, 2024

On March 29, 2022, we received a complete response leer, or CRL, from the FDA, in response to our NDA for vadadustat for the treatment of anemia due to
CKD in adult paents in its present form. In October 2022, we submied a Formal Dispute Resoluon Request with the FDA and in May 2023, the Office of
New Drugs, or OND, denied our appeal but provided a path forward for us to resubmit the NDA for vadadustat for the treatment of anemia due to CKD for
dialysis dependent paents without the need for us to generate addional clinical data. In September 2023, we completed our resubmission to our NDA for
vadadustat  for  the  treatment  of  anemia  due  to  CKD  in  adult  paents  on  dialysis.  In  October  2023,  the  FDA  acknowledged  our  NDA  resubmission  was
complete, classified it as a Class 2 response and set a PDUFA date of March 27, 2024.

Impact of Inflaon

We are experiencing rising costs for certain inflaon-sensive operang expenses, such as labor, and certain of our service providers are heavily dependent
on  labor.  We  do  not  believe  these  impacts  were  material  to  our  net  loss  during  the  year  ended  December  31,  2023  or  will  be  going  forward.  However,
significant sustained inflaon rates driven by the macroeconomic environment or other factors could negavely impact our margins, profitability and results
of operaons in future periods.

Results of Operaons

The tables and discussion below present the results for the periods indicated. The year ended December 31, 2022 has been updated to reflect the errors
revised in prior periods and as described in more detail in Note 1, Revision of Previously Issued Financial Statements, in the notes to the consolidated financial
statements found in Part II, Item 8 of our 2022 Form 10-K/A filed with the SEC on August 28, 2023:

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(dollars in thousands)
Revenues

Product revenue, net
License, collaboraon and other revenue

Total revenues

Cost of goods sold

Cost of product and other revenue
Amorzaon of intangible asset

Total cost of goods sold

Operang expenses

R&D
SG&A
License
Restructuring

Total operang expenses

Operang loss
Other expense, net
Loss on exnguishment of debt
Loss on terminaon of lease
Net loss

*Percentage change not meaningful.

Years ended December 31,

2023

2022

Change 2023-2022

$

%

$

$

170,301  $
24,322 
194,623 

38,107 
36,042 
74,149 

63,079 
100,233 
3,237 
181 
166,730 
(46,256)
(5,145)
— 
(524)
(51,925) $

176,949  $
115,535 
292,484 

49,526 
36,042 
85,568 

129,986 
138,601 
3,175 
15,933 
287,695 
(80,779)
(12,541)
(906)
— 
(94,226) $

(6,648)
(91,213)
(97,861)

(11,419)
— 
(11,419)

(66,907)
(38,368)
62 
(15,752)
(120,965)
34,523 
7,396 
906 
(524)
42,301 

(4)%
(79)%
(33)%

(23)%
— %
(13)%

(51)%
(28)%
2 %
(99)%
(42)%
(43)%
(59)%
(100)%
*
(45)%

Product  Revenue,  Net—Net  product  revenue  is  derived  from  sales  of  our  only  commercial  product  in  the  U.S.,  Auryxia.  We  distribute  Auryxia  principally
through a limited number of wholesale distributors as well as certain specialty pharmacy providers.

Net  product  revenue  was  $170.3  million  for  the  year  ended  December  31,  2023,  compared  to  net  product  revenue  of  $176.9  million  for  the  year  ended
December 31, 2022. The decrease was primarily due to a reducon in volume, parally offset by price increases, favorable payor mix and execuon of our
contracng strategy with third party payors.

Auryxia will lose exclusivity in the U.S. in March 2025, which may have a negave impact on revenue. We believe CMS's decision to include phosphate binders
in the dialysis bundle could potenally lead to higher sales of Auryxia aer the LoE date than in other LoE scenarios, and plan to work with third-party payors
and providers to connue the use of Auryxia beyond LoE.

License, Collaboraon and Other Revenue—License, collaboraon and other revenue was $24.3 million for the year ended December 31, 2023, compared to
$115.5 million for the year ended December 31, 2022. The decrease was due primarily to the terminaon of the Otsuka agreements in June 2022 under
which we recognized $92.3 million and a reducon of $12.5 million in revenue recognized from the supply of drug product to MTPC, parally offset by a one-
me $10.0 million upfront payment from Medice received in 2023 in connecon with entering into our license agreement with Medice for their development
and commercializaon of vadadustat in the EU.

We do not expect to recognize any future revenue under any of the Otsuka agreements, which were terminated on June 30, 2022. Addionally, we expect our
revenue under our supply agreement with MTPC to connue to decline due to the assignment of our supply agreement with Esteve Química, S.A. to MTPC in
December 2022.

See Note 12, License, Collaboraon and Other Revenue, in the accompanying notes to the consolidated financial statements included in Part II, Item 8 of this
Form 10-K for further informaon.

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A further breakdown of the license, collaboraon and other revenue is as follows:

License, Collaboraon and Other Revenue (dollars in thousands)
License Fees:
Medice upfront license payment
Drug Product Supply:
MTPC vadadustat drug product supply
Medice vadadustat drug product supply

Drug Product Supply Subtotal

Royales:
JT and Torii royales
MTPC royales

Royales Subtotal

Years Ended December 31,

2023

2022

$

10,000  $

3,738 
968 
4,706 

5,394 
1,997 
7,391 
2,225 
24,322  $

— 

16,191 
— 
16,191 

5,291 
1,777 
7,068 
92,276 
115,535 

Otsuka U.S. and Internaonal Agreements (Terminated)

Total License, Collaboraon and Other Revenue

$

Cost  of  Goods  Sold:  Cost  of  Product  and  Other  Revenue—Cost  of  product  and  other  revenue  was  $38.1  million  for  the  year  ended  December  31,  2023,
compared to $49.5 million for the year ended December 31, 2022. The decrease was driven by lower year-over-year sales volume and a reducon in the
write-downs of inventories to net realizable value in 2023. In addion, for the year ended December 31, 2023, we realized a lower cost of product and other
revenue of $4.3 million due to our ability to commercially sell inventory previously wrien-down as excess inventory. Primarily during the first half of 2024,
we ancipate realizing lower costs of up to $12.3 million related to our ability to commercially sell inventory previously wrien-down as excess inventory. For
the year ended December 31, 2023, we recorded $1.5 million related to our firm purchase commitment liability.

For the year ended December 31, 2022, we recorded a net benefit of $37.2 million comprised of a one-me $28.7 million terminaon fee in connecon with
the  BioVectra  Terminaon  Agreement  offset  by  a  one-me  benefit  of  $65.9  million  due  to  the  reducon  of  our  firm  purchase  commitment  liability  in
connecon with the BioVectra Terminaon Agreement.

We  expense  pre-launch  inventory  for  the  U.S.  and  Medice  Territory,  including  certain  manufacturing  related  expenses  as  R&D  expenses  unl  the  product
receives the required approval. Medice obtained markeng authorizaon from the EMA for Vafseo in April 2023. During 2023, under a side-leer, we sold
certain  lots  of  Vafseo  to  Medice.  If  the  pre-launch  inventory  had  been  capitalized  and  the  associated  cost  recognized  when  we  sold  the  product,  cost  of
product and other revenue for the year ended December 31, 2023 would have increased by approximately $0.8 million. The selling of the remaining zero cost
inventories of Vafseo on hand of approximately $28.4 million as of December 31, 2023 will be dependent on the ming of sales of Vafseo related in the U.S., if
approved, and Medice Territory.

Cost of Goods Sold: Amorzaon of Intangible Asset—Amorzaon of intangible asset relates to the acquired developed product rights for Auryxia, which is
being amorzed using a straight-line method over its esmated useful life of approximately six years. Amorzaon of the intangible asset during each of the
years ended December 31, 2023 and 2022 was $36.0 million and will connue through the end of 2024.

R&D Expenses— R&D expenses were $63.1 million for the year ended December 31, 2023, compared to $130.0 million for the year ended December 31,
2022. The decrease of $66.9 million was a result of the compleon of certain clinical trials coupled with cost reducon efforts that began in 2022 following
the complete response leer for vadadustat in the U.S. In 2022, we began streamlining and opmizing our operaons to align with our business goals which
yielded savings of approximately $15.8 million in 2023, primarily due to the reduced headcount related costs as a result of the 2022 reducon in force and the
overall lower headcount in 2023. In 2023, clinical trial costs decreased by approximately $23.7 million, which is largely aributed to the wind-down of certain
clinical trials. We also slowed the producon of pre-launch inventory while we resubmied our NDA to the FDA. We submied the revised NDA in September
2023 and are awaing a response from the FDA on our PDUFA date of March 27, 2024. We believe we have sufficient levels of pre-launch inventory on hand
to support both the U.S., if approved, and the European launch that were previously expensed in the current or prior years to R&D expenses.

During 2022, we incurred higher regulatory compliance fees associated with vadadustat, higher costs associated with the exploraon of a new manufacturing
method and process costs related to Auryxia and recorded a $8.8 million non-cash

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Table of Contents

expense  in  connecon  with  the  R&D  services  the  Company  received  from  Otsuka.  In  addion,  in  2022,  received  $5.4  million  from  our  then  collaboraon
partner which was used to offset the cost of the pre-launch inventory of $13.0 million ($7.6 million net).

The 

following 

table 

summarizes  our  R&D  expenses 

for 

the 

years  ended  December  31,  2023 

and  2022 
Years ended December 31,

(in 

thousands):

2023

2022

Vadadustat clinical trial and other external costs
Vadadustat pre-launch inventory
External costs for other programs, including feasibility and new processes and methods associated
with commercial products

Total external R&D expenses

Internal personnel, consulng, facilies and other

Total R&D expenses

$

$

14,792  $
6,434 

7,902 
29,128 
33,951 
63,079  $

51,196 
7,589 

21,422 
80,207 
49,779 
129,986 

We expect to incur significant R&D expenses in future periods in support of ongoing or planned studies with respect to the development of potenal product
candidates and our product candidate porolio as well as vadadustat.

Selling, General and Administrave Expenses—SG&A expenses were $100.2 million for the year ended December 31, 2023, compared to $138.6 million for
the  year  ended  December  31,  2022.  The  decrease  of  $38.4  million  was  primarily  due  to  decreased  headcount  related  costs,  including  stock-based
compensaon, as a result of the 2022 reducons in force, decreased professional service, consulng and outsourced contract expenses and lower markeng
and promoonal expenses. In addion, we successfully reduced our facilies footprint in May 2023 when we assigned our lease for 27,924 square feet of
office space that was located in the Boston, Massachuses, or the Boston Lease, allowing us to reduce our costs by approximately $2.4 million annually. See
Note 9, Leases, in the accompanying notes to the consolidated financial statements included in Part II, Item 8 of this Form 10-K for further informaon on the
Boston Lease.

While we expect to connue to find ways to operate more efficiently and reduce our general and administrave expenses, we will invest those savings in our
sales and markeng and commercial efforts as we prepare for the launch of vadadustat, if approved in the U.S.

License Expenses—License expense related to royales due to Panion for sales of Riona in Japan were $3.2 million for each of the years ended December 31,
2023 and 2022.

Restructuring Expenses—Restructuring  expenses  were  $0.2  million  for  the  year  ended  December  31,  2023,  compared  to  $15.9  million  for  the  year  ended
December 31, 2022. Following the receipt of the complete response leer, or CRL, for vadadustat in the second quarter of 2022, we implemented a reducon
of our workforce which reduced our headcount by approximately 42% and impacted all departments, including several members of senior management. On
November  7,  2022,  we  implemented  a  further  reducon  in  our  workforce  by  approximately  14%  consisng  solely  of  individuals  within  the  commercial
organizaon as a result of our decision to shi to a strategic account management focused model for our commercial efforts. These acons reflected our
determinaon to refocus our strategic priories around our commercial product, Auryxia, and our development porolio, and were steps in a broader cost
savings plan to significantly reduce our operang expense profile. We connue to decrease our operang expenses by seeking to operate more efficiently and
curtail non-headcount related expense growth. We expect to slightly increase our headcount primarily on our commercial and medical affairs teams in 2024
in connecon with a vadadustat launch, if approved.

Other  Expense,  Net—Other  expense,  net,  was  $5.1  million  for  the  year  ended  December  31,  2023,  compared  to  $12.5  million  for  the  year  ended
December  31,  2022.  The  decrease  was  primarily  due  to  a  decrease  in  interest  expense  as  a  result  of  reducing  our  outstanding  principal  balance  on  the
Pharmakon Term Loans by $32.0 million offset by a nearly 228 basis point increase in the interest rate since the year ended December 31, 2022. In addion,
we no longer record interest on our liability for the sale of future royales.

Loss on Exnguishment of Debt—During the year ended December 31, 2022, we recorded a debt exnguishment loss of $0.9 million related to the principal
prepayments made on the Pharmakon Term Loans pursuant to the Second Amendment and Waiver.

Loss on Lease Terminaon—On May 26, 2023 we incurred a loss on lease terminaon of $0.5 million in connecon with the assignment of our Boston Lease.
In accordance with ASC 842, Leases, we wrote off the right-of-use asset and lease liability associated with the Boston Lease, and recognized the difference
between the right-of-use asset and the lease liability offset by the payment we made to LG Chem Life Sciences Innovaon Center, Inc. in connecon with the
assignment of $1.3 million. See Note 9, Leases, in the accompanying notes to the consolidated financial statements included in Part II, Item 8 of this Form 10-
K for further informaon.

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Table of Contents

Liquidity and Capital Resources

As of December 31, 2023, we had cash and cash equivalents of approximately $42.9 million and restricted cash of $1.7 million.

To date, we have funded our operaons principally through sales of our common stock, including through our employee stock purchase plan, product sales,
payments received from our collaboraon and licensing partners, borrowings under term loans, a working capital payment from CSL Vifor also referred to as a
refund liability and a royalty transacon. From incepon through December 31, 2023, we raised approximately $820.2 million of net proceeds from the sale
of equity, including $519.8 million from various underwrien public offerings, $230.4 million from at-the-market offerings, or ATM Offerings, pursuant to our
sales agreement with Jefferies LLC and prior sales agreements with Cantor Fitzgerald & Co., and $70.0 million from the sale of 7,571,429 shares of common
stock to CSL Vifor. From January 1, 2024 through February 23, 2024, we sold 13,261,311 shares of our common stock under our Sales Agreement, resulng in
proceeds to us of $18.7 million, net of offering expenses, which are not included in the above amounts reported under the ATM sales agreement.

We have incurred recurring losses and negave cash flow from operaons in each year since incepon and ancipate net losses and negave cash flows for
the near future. For the years ended December 31, 2023 and 2022, we incurred net operang losses of $51.9 million and $94.2 million, respecvely. As of
December 31, 2023 and 2022, we had an accumulated deficit of $1.6 billion.

We currently have exclusive rights under a series of patents and patent applicaons to commercialize Auryxia in the U.S. that protect us from generic drug
compeon unl March 2025. Following LoE, in the U.S., we may not be able to realize enough product revenue from sales of Auryxia to realize net profits
from product sales. While we believe CMS's decision to include phosphate binders in the dialysis bundle could potenally lead to higher sales of Auryxia aer
the LoE date than in other LoE scenarios, and plan to work with payors and providers to connue the use of Auryxia beyond LoE, Auryxia product sales have
not  generated,  and  may  not  generate,  now  or  following  LoE  in  the  U.S.,  sufficient  product  revenue  to  realize  net  profits  from  product  sales  to  cover  our
current or long-term operang costs.

We believe our exisng cash resources and the cash we expect to generate from product, royalty, supply and license revenues as well as the borrowings and
potenal  future  borrowing  that  are  available  under  the  BlackRock  Credit  Agreement  and  the  working  capital  liability  are  sufficient  to  fund  our  current
operang plan for at least twenty-four months if vadadustat is approved in the U.S. and for at least twelve months from filing the Form 10-K, if vadadustat is
not approved in the U.S. However, if our operang performance deteriorates significantly from the levels expected in our operang plan, or if vadadustat is
not approved in the U.S., it would have an adverse effect on our liquidity and capital resources and could affect our ability to connue as a going concern in
the future. In addion, we may also seek to sell addional private or public equity, enter into new debt transacons, explore potenal strategic transacons
or  a  combinaon  of  these  approaches  or  other  strategic  alternaves.  If  we  raise  addional  funds  by  issuing  equity  securies,  our  shareholders  would
experience diluon. Debt financing, if available, may involve covenants restricng our operaons or our ability to incur addional debt. Any debt financing or
addional equity that we raise may contain terms that are not favorable to us or our stockholders. Addional financing may not be available to us in amounts
or on terms acceptable to us, if at all. If we are unable to raise addional capital in sufficient amounts when needed or on aracve terms, we may not be
able to pursue development and commercial acvies related to Auryxia and vadadustat, if approved, or any addional products and product candidates,
including those that may be in-licensed or acquired. Any of these events could significantly harm our business, financial condion and prospects.

There can be no assurance that the current operang plan will be achieved in the me frame ancipated by us, or that our cash resources will fund our
operang plan for the period of me ancipated by us, or that addional funding will be available on terms acceptable to us, or at all. Our forecast of the
period of me through which our financial resources will be adequate to support our operaons is a forward-looking statement and involves numerous risks
and uncertaines, and actual results could vary as a result of a number of factors, many of which are outside our control. We have based this esmate on
assumpons that may be substanally different than actual results, and we could ulize our available capital resources sooner than we currently expect. Our
future funding requirements, both near- and long-term, will depend on many factors including, but not limited to, those described under Part I, Item 1A. Risk
Factors under the heading "Risks Related to our Financial Posion, Need for Addional Capital and Growth Strategy."

Contractual Obligaons and Commitments

Debt Agreements and Other Funding Arrangements

BlackRock Term Loans

On January 29, 2024, or the Closing Date, we entered into the BlackRock  Credit  Agreement,  which  provides  for  a  senior  secured  term  loan  facility,  in  the
aggregate principal amount of up to $55.0 million, or the Term Loan Facility. The inial tranche of $37.0 million, or the Tranche A Loan, was funded on the
Closing  Date  and  used  to  pay  off  the  Pharmakon  Term  Loans.  The  Term  Loan  Facility  provides  for  addional  tranches  available  as  follows:  (i)  $8.0  million
available in a single draw

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through December 31, 2024, or the Tranche B Loan, and (ii) $10.0 million available in a single draw through December 31, 2024, or the Tranche C Loan and,
together with the Tranche A Loan and the Tranche B Loan, the Term Loans. The Term Loan Facility matures on March 31, 2025, which will be automacally
extended to January 29, 2028 if we receive FDA approval for vadadustat on or prior to June 30, 2024, or the BlackRock Maturity Date.

We are required to make interest-only payments unl December 31, 2026 aer which, we will begin making equal monthly principal payments.

The Term Loan Facility will accrue interest at a floang annual rate equal to the sum of (i) term Secured Overnight Financing Rate, or SOFR, for a tenor of one
month (subject to a floor of 4.25% per annum) plus (ii) a margin of 6.75% per annum (subject to an overall cap of 15.00% per annum on the all-in interest
rate). During the connuance of any payment event of default the interest rate on such overdue sum will automacally increase by an addional 3.0% per
annum, and may be subject to an addional late fee of 2.0% of such overdue sum.

In the event of certain prespecified events, the repayment schedule will be accelerated. For example, if FDA approval of vadadustat is not obtained on or prior
to June 30, 2024, the interest only period will automacally terminate on October 1, 2024, and we will be required to repay the Term Loans in seven equal
monthly payments (comprised of principal and interest), commencing on October 1, 2024 and ending on the BlackRock Maturity Date.

All obligaons under the Term Loan Facility are secured by substanally all of our exisng and aer-acquired assets. The BlackRock Credit Agreement requires
us  to  either  (i)  maintain  cash  and  cash  equivalents,  measured  as  of  the  last  day  of  each  fiscal  month,  greater  than  or  equal  to  $15.0  million  or  (ii)  earn
consolidated  revenue,  measured  as  of  the  last  day  of  each  fiscal  month  for  the  trailing  twelve-month  period,  of  $150.0  million.  The  BlackRock  Credit
Agreement  contains  certain  representaons  and  warranes,  affirmave  and  negave  covenants  that  limit  our  ability  to  engage  in  specified  types  of
transacons and other provisions typical within a credit agreement. If an event of default occurs and is connuing under the BlackRock Credit Agreement,
BlackRock is entled to take enforcement acon, including acceleraon of amounts due. If we prepay the Term Loans prior to the BlackRock Maturity Date,
we will be required to pay a prepayment fee ranging from 1.0% to 4.0% of the amount prepaid.

On the Closing Date, Kreos Capital VII Aggregator SCSp, an affiliate of Kreos, or the Warrant Holder, received a warrant to purchase 3,076,923 shares of our
common stock, at an exercise price per share of $1.30, and upon borrowing of Tranche C, we will become obligated to issue addional warrants to purchase
1,153,846 shares of our common stock at an exercise price per share of $1.30. Each warrant shall be exercisable for eight years from date of issuance.

As of December 31, 2023, we had outstanding debt of $35.0 million, net of debt issuance costs of $0.3 million with Pharmakon.

In  connecon  with  the  entry  into  the  BlackRock  Credit  Agreement,  on  the  Closing  Date,  we  terminated  the  Pharmakon  Loan  Agreement,  all  obligaons
thereunder were paid in full and discharged and Pharmakon's security interests in our assets and property were released. See Note 7, Indebtedness, in the
accompanying notes to the consolidated financial statements included in Part II, Item 8 of this Form 10-K for further informaon.

Working Capital Fund/Refund Liability

In February 2022, we amended our agreement with CSL Vifor and they contributed $40.0 million to a working capital fund, or the Working  Capital  Fund,
established to parally fund our costs of purchasing vadadustat from our contract manufacturers. The Working Capital Fund amount may fluctuate, and will
be repaid to CSL Vifor over me.

We have recorded the Working Capital Fund as a refund liability under ASC 606, Revenue from Contracts with Customers. The refund liability is considered a
debt arrangement with zero coupon interest and we impute interest on the refund liability at a rate of 15.0% per annum. As of December 31, 2023, the $40.1
million  refund  liability  is  classified  as  a  long-term  liability  based  on  management's  esmated  ming  of  the  repayment  of  the  refund  liability  to  CSL  Vifor
exceeding  one-year.  See  Note  8,  Deferred  Revenue,  Refund  Liability  and  Liability  Related  to  Sale  of  Future  Royales,  in  the  accompanying  notes  to  the
consolidated financial statements in Part II, Item 8 of this Form 10-K for further informaon.

Liability Related to Sale of Future Royales

In February 2021, we sold to HealthCare Royalty Partners IV L.P., or HCR, our right to receive royales and sales milestones for vadadustat in Japan and certain
other Asian countries, such countries collecvely, the MTPC Territory, such payments collecvely the Royalty Interest Payments, in each case, payable to us
under the MTPC Agreement. The Royalty Interest Payments are subject to an annual maximum “cap” of $13.0 million, aer which we will receive 85% of the
Royalty Interest Payments for the remainder of that year. The Royalty Interest Payments are also subject to an aggregate maximum “cap” of $150.0 million,
aer which the Royalty Interest Payments will revert back to us.

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We received $44.8 million from HCR, net of certain transacon expenses, which we recorded as a liability at the transacon date. We amorze the liability
related  to  the  sale  of  future  royales  using  the  effecve  interest  method  over  the  life  of  the  arrangement.  The  annual  effecve  interest  rate  as  of
December 31, 2023 was 0%. We retain the right to receive all potenal future regulatory milestones for vadadustat under the MTPC Agreement. During the
year ended December 31, 2023 and 2022, we recorded $2.0 million and $1.8 million of non-cash royalty revenue, respecvely. See Note 8, Deferred Revenue,
Refund Liability and Liability Related to Sale of Future Royales, in the accompanying notes to the consolidated financial statements in Part II, Item 8 of this
Form 10-K for further informaon.

Off-Balance Sheet Arrangements

Leer of Credit

As of December 31, 2023, in connecon with the Cambridge Lease (as defined below), we had $1.7 million in a leer of credit outstanding.

Director and Officer Indemnificaon

We have entered into indemnificaon agreements with our directors and certain officers that will require us, among other things, to indemnify them against
certain liabilies that may arise by reason of their status or service as directors or officers. No demands have been made upon us to provide indemnificaon
under such agreements and there are no claims that we are aware of that could have a material effect on our consolidated financial statements.

Contractual Obligaons and Commitments Other Than Debt Agreements

We are party to contractual obligaons involving commitments to make payments to third pares in the future. Certain contractual obligaons are reflected
on our consolidated balance sheet as of December 31, 2023, while others are considered future obligaons. Our material cash requirements as of December
31,  2023,  include  contractual  obligaons  and  commitments  arising  in  the  normal  course  of  business,  including  leases,  license  agreements,  manufacturing
agreements and uncondional purchases commitments which are described in more detail below.

Cambridge Leases

We  lease  approximately  65,167  square  feet  of  office,  storage  and  laboratory  space  in  Cambridge,  Massachuses  under  non-cancelable  operang  leases,
collecvely the Cambridge Lease. The office and storage lease expires on September 11, 2026 and the lease for the laboratory space expires on January 31,
2025. We ceased using approximately two-thirds of our office space in 2022 and we are currently markeng the furnished office space for sublease.

See Note 9, Leases, in the accompanying notes to the consolidated financial statements included in Part II, Item 8 of this Form 10-K for further informaon.

License Agreements

We have a license agreement with Panion, under which we are required to pay royales related to the sale of Auryxia. The royalty payment obligaons are
conngent upon generang product revenue, and the amount and ming of such payments are not known. See Note 10, Commitments and Conngencies, in
the accompanying notes to the consolidated financial statements included in Part II, Item 8 of this Form 10-K for further informaon.

In June 2021, we entered into a license agreement, or Cyclerion Agreement, with Cyclerion Therapeucs Inc. under which we obtained an exclusive global
license  under  certain  intellectual  property  rights  to  research,  develop  and  commercialize  praliciguat,  an  invesgaonal  oral  soluble  guanylate  cyclase
smulator. We may be obligated to pay up to an aggregate of $222.0 million in specified development and regulatory milestone payments, certain specified
commercial milestones and ered royales ranging from a low-single-digit to mid-double-digit percentage of net sales, on a product-by-product basis, and
subject to reducon upon expiraon of patent rights or the launch of a generic product in the territory.

Unless earlier terminated, the Cyclerion Agreement will expire on a product-by-product and country-by-country basis upon the expiraon of the last royalty
term, which ends upon the longest of (i) the expiraon of the patents licensed under the Cyclerion Agreement, (ii) the expiraon of regulatory exclusivity for
such product and (iii) ten years from first commercial sale of such product. We may terminate the Cyclerion Agreement in its enrety or only with respect to a
parcular licensed compound or product upon 180 days' prior wrien noce to Cyclerion. The pares also have customary terminaon rights, subject to a
cure period, in the event of the other party’s material breach of the Cyclerion Agreement or in the event of certain addional circumstances.

Manufacturing Agreements

We have various supply arrangements to which we are a party, and we are obligated to pay for drug substance and drug product for commercial use. Under
one  of  our  agreements,  we  are  required  to  purchase  a  minimum  quanty  of  Auryxia  drug  substance  at  a  predetermined  price.  We  are  also  obligated  to
purchase a certain percentage of the global demand for

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vadadustat drug substance and drug product based on certain quarterly and annual forecasts we provide to certain suppliers. Our supply agreements for
vadadustat  drug  substance  and  drug  product  provide  for  a  volume-based  pricing  structure.  We  may  also  be  required  to  reimburse  certain  suppliers  for
reasonable expenses.

See Note 10, Commitments and Conngencies, in the accompanying notes to the consolidated financial statements included in Part II, Item 8 of this Form 10-
K for further informaon.

Amounts Due Under Former Manufacturing and Uncondional Purchase Commitments

On December 22, 2022, we and BioVectra terminated any and all exisng agreements for BioVectra to supply us Auryxia drug substance. Under the BioVectra
Terminaon Agreement, we agreed to pay BioVectra a total of $32.5 million consisng of (i) an upfront payment of $17.5 million that was paid in December
2022 and (ii) six quarterly payments of $2.5 million commencing in April 2024. In addion, we and BioVectra have released one another from all exisng and
future claims and liabilies and agreed to return certain materials and documents.

Other Third Party Contracts

Uncondional Purchase Commitments

We  enter  into  agreements  in  the  normal  course  of  business  with  various  vendors,  which  are  generally  cancellable  upon  noce.  Payments  due  upon
cancellaon consist only of payments for services provided or expenses incurred, including non-cancellable obligaons of service providers, up to the date of
cancellaon. In addion, we contract with various organizaons to conduct R&D acvies with remaining contract costs to us of approximately $44.7 million
as of December 31, 2023. The scope of the services under these R&D contracts can be modified and the contracts cancelled by us upon wrien noce. In
some instances, the contracts may be cancelled by the third party upon wrien noce.

Cash Flows

The 

following 

table  provides  a  summary  of  cash  flow  data 

for  each  applicable  period: 

NET CASH PROVIDED BY/(USED IN) (in thousands):

Operang acvies
Invesng acvies
Financing acvies

Net decrease in cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash — beginning of period
Cash, cash equivalents and restricted cash — end of period

Operang Acvies

Years ended December 31,
2022
2023

(23,384) $
— 
(25,206)
(48,590) $
93,169 
44,579  $

(73,154)
(114)
14,598 
(58,670)
151,839 
93,169 

$

$

$

Net cash used in operang acvies during the year ended December 31, 2023 was $23.4 million. Net cash used in operang acvies during the year ended
December 31, 2023 consisted of a net loss of $51.9 million and net non-cash adjustments of $49.3 million, including amorzaon of our intangible asset of
$36.0 million, and a reducon of $20.7 million in working capital.

Net cash used in operang acvies during the year ended December 31, 2022 was $73.2 million. Net cash used in operang acvies consisted of a net loss
of $94.2 million and non-cash adjustments of $22.5 million, including amorzaon of our intangible asset of $36.0 million and decrease in our inventory firm
purchase commitments that reduced our net loss by $65.9 million, primarily due to the terminaon of our supply agreement with BioVectra, and a reducon
of $1.4 million in working capital.

Invesng Acvies

No net cash was used in invesng acvies during the year ended December 31, 2023.

Net cash used in invesng acvies during the year ended December 31, 2022 of $0.1 million was used to purchase equipment.

Financing Acvies

Net cash used in financing acvies for the year ended December 31, 2023 was $25.2 million and consisted of principal payments of $32.0 million parally
offset by $6.7 million of net proceeds from the sale of common stock under our ATM Facility and from the sale of stock under our employee stock purchase
plan.

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Net cash provided by financing acvies for the year ended December 31, 2022 was $14.6 million and consisted of net proceeds from a refund liability to a
customer of $40.0 million, net proceeds from the issuance of common stock of $7.1 million under our then current at-the-market offering facility and
proceeds from the exercise of common stock opons and from the sale of stock under our employee stock purchase plan, parally offset by principal
payments of debt of $33.0 million.

Recent Accounng Pronouncements

For a discussion of recent accounng pronouncements not yet adopted, see Note 2, Summary of Significant Accounng Policies, to our consolidated financial
statements included in Part II, Item 8 of this Form 10-K.

Crical Accounng Policies and Significant Judgments and Esmates

Our management's discussion and analysis of our financial condion and results of operaons are based upon our consolidated financial statements included
elsewhere in this Form 10-K, which consolidated financial statements have been prepared in accordance with U.S. generally accepted accounng principles,
or U.S. GAAP. The preparaon of these consolidated financial statements requires us to make esmates and judgments that affect the reported amounts of
assets,  liabilies,  revenues  and  expenses,  including  the  current  or  long-term  classificaon  of  such  assets,  liabilies  and  expenses,  classificaon  of  the
expenses and the related disclosure of conngent assets and liabilies. We monitor our esmates on an ongoing basis for changes in facts and circumstances,
and material changes in these esmates could occur in the future. Changes in esmates are recorded in the period in which they become known. We base
our esmates on historical experience and other assumpons that we believe to be reasonable under the circumstances. Actual results may differ from our
esmates if past experience or other assumpons do not turn out to be substanally accurate.

While  our  significant  accounng  policies  are  described  in  more  detail  in  Note  2,  Summary  of  Significant  Accounng  Policies,  to  our  consolidated  financial
statements in Part II, Item 8 of this Form 10-K, we believe the following accounng policies are those most crical to the judgments and esmates used in the
preparaon of our consolidated financial statements and to understanding of our results of operaons.

Inventories, including Pre-Launch Inventory

We assess the value of our inventories quarterly at the lower-of-cost or net realizable value, with approximate cost determined using the first-in, first-out
method. Work-in-process and finished goods inventories include materials, labor, and overhead. Other long-term assets include inventory expected to remain
on hand beyond one year.

We write down inventories based on quality control tesng data, or when product is obsolete or condions exist that suggest that inventory may be in excess
of the ancipated demand based on assumpons about future demand for our products and market condions. Our esmates of forecasted demand are
based  upon  our  analysis  and  assumpons  including,  but  not  limited  to,  expected  product  lifecycles,  market  condions,  product  development  plans  and
historical  usage  by  product.  If  actual  market  condions  are  less  favorable  than  our  forecasts,  or  actual  demand  from  our  customers  is  lower  than  our
esmates,  we  may  be  required  to  record  addional  inventory  write-downs.  If  actual  market  condions  are  more  favorable  than  ancipated,  inventory
previously wrien down may be sold, resulng in lower cost of sales and higher income from operaons than expected in that period.

Impairment charges are recorded as a component of cost of product sales in the consolidated statements of operaons and comprehensive loss in the period
in which the impairment or excess quanty is idenfied.

The costs incurred to manufacture pre-launch inventory in advance of markeng authorizaon in the EU and FDA approval in the U.S. is expensed to R&D.

Impairment of Long-Lived Assets and Intangible Assets Subject to Amorzaon

Long-lived assets primarily include property and equipment, right-of-use assets, intangible assets and goodwill. Right-of-use assets pertain to leases of our
office and laboratory spaces and the property and equipment primarily related to the leasehold improvements made to the right-of-use assets as well as
furniture and laboratory equipment. In 2018, we recorded a definite-lived intangible asset related to developed product rights for Auryxia in connecon with
our merger with Keryx Biopharmaceucals, Inc., or Keryx. We amorze our intangible asset that has a finite life using the straight-line method, which we
esmated to be six years. As of December 31, 2023, we had $36.0 million on our consolidated balance sheet that is being amorzed through December 2024.

Goodwill is the amount by which the purchase price of acquired net assets in a business combinaon exceeded the fair values of net idenfiable assets on the
date of acquision. Goodwill is not amorzed but is subject to impairment test annually or more frequently if events or changes in circumstances suggest that
the carrying value of goodwill may not be recoverable,

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ulizing either the qualitave or quantave method. The goodwill recorded in our financial statements pertains to the merger with Keryx in 2018.

Annually, or more frequently upon certain indicators of impairment, we review our esmates and assumpons underlying the fair value of our long-lived
assets when indicators of impairment are present. If an impairment indicator exists, we perform a recoverability test by a comparison of the carrying amount
of an asset or reporng unit to the future undiscounted net cash flows expected to be generated by the asset or reporng unit. If such assets are considered
to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the asset exceeds the fair value of the asset or
reporng unit.

We calculate the fair value of the long-lived asset group as the present value of esmated future cash flows expected to be generated from the long-lived
asset  group  using  a  risk-adjusted  discount  rate.  In  determining  esmated  future  cash  flows  associated  with  the  long-lived  asset  group,  we  use  market
parcipant assumpons pursuant to ASC Topic 820, Fair Value Measurements and Disclosures.

Working Capital Fund/Refund Liability to Customer

We treat the refund liability related to the Vifor Working Capital Fund as a debt arrangement with zero coupon interest, which is recorded at net present
value. On March 18, 2022, when the funds were received from CSL Vifor, we recorded an inial discount on the refund liability and a corresponding deferred
gain to the refund liability on the consolidated balance sheets. The discount on the refund liability is being amorzed to interest expense using the effecve
interest method over the expected term of the Vifor Agreement. The deferred gain is being amorzed to interest income on a straight-line basis over the
expected term of the Vifor Agreement.

Product Revenue, Net

We recognize revenue on product sales when the customer obtains control of our product, which occurs at a point in me, typically upon delivery to the
customer. We expense incremental costs of obtaining a contract as and when incurred if the expected amorzaon period of the asset that we would have
recognized is one year or less.

The  most  significant  esmate  we  are  required  to  make  is  related  to  government  and  private  payor  rebates,  chargebacks,  discounts  and  fees,  collecvely
rebates  (collecvely  considered  variable  consideraon).  The  values  of  the  rebates  provided  to  third-party  payors  vary  significantly  and  are  based  on
government-mandated  discounts  and  our  arrangements  with  other  third-party  payors.  To  esmate  our  total  rebates,  we  esmate  the  percentage  of
prescripons that will be covered by each third-party payor, which is referred to as the payor mix. Thus, revenue from product sales is recorded at the net
sales  price  (transacon  price),  which  includes  esmates  of  variable  consideraon,  which  are  described  below.  We  track  available  informaon  regarding
changes, if any, to the payor mix for our products, to our contractual terms with third-party payors and to applicable governmental programs and regulaons
and  levels  of  our  products  in  the  distribuon  channel.  We  adjust  our  esmated  rebates  based  upon  new  informaon  as  it  becomes  available,  including
informaon regarding actual rebates for our products and forecasted customer buying and payment demands. Claims by third-party payors for rebates are
submied to us significantly aer the related sales, potenally resulng in adjustments in the period in which the new informaon becomes known. Our
adjustments to revenue related to prior period sales have not been significant.

Further details on the variable consideraon components or reserves include:

•

•

•

Trade Discounts and Allowances—Discounts that include incenve fees that are explicitly stated in our contracts. In addion, we compensate
(through trade discounts and allowances) our customers for sales order management, data and distribuon services.

Product Returns—Consistent  with  industry  pracce,  subject  to  certain  caps  for  certain  customers,  we  generally  offer  customers  a  limited  right  of
return which allows for the product to be returned when the product expiry is within an allowable window, when the quanty delivered is different
than quanty ordered, the product is damaged in transit prior to receipt by the customer, or is subject to a recall. This right of return generally lapses
once the product is provided to a paent. We esmate the amount of our product sales that may be returned for credit by our customers. Product
return reserves are esmated primarily based on our gross sales mulplied by an esmated return rate calculated using our historical actual rate of
return for product sales as well as recent trends on lots sll subject to the return window. In addion, certain customers are subject to an annual cap
on returns of 2% of gross sales in any given year.

Provider  Chargebacks  and  Discounts—Chargebacks  for  fees  and  discounts  to  providers  represent  the  esmated  obligaons  resulng  from
contractual commitments to sell products to qualified healthcare providers at prices lower than the list prices charged to customers who directly
purchase the product from us. Customers charge us for the difference between what they pay for the product and the ulmate selling price to the
qualified healthcare providers. Reserves for chargebacks consist of credits that we expect to issue for units that remain in the distribuon

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channel at each reporng period end that we expect will be sold to qualified healthcare providers and chargebacks that customers have claimed but
for which we have not yet issued a credit.

•

Commercial and Medicare Part D Rebates—We  contract  with  various  commercial  payor  organizaons,  primarily  health  insurance  companies  and
pharmacy benefit managers, for the payment of rebates with respect to ulizaon of our products. We esmate the rebates for commercial and
Medicare  Part  D  payors  based  upon  (i)  our  contracts  with  the  payors  and  (ii)  informaon  obtained  from  our  customers  and  other  third  pares
regarding the payor mix for Auryxia.

• Other Government Rebates—We are subject to discount obligaons under state Medicaid programs and other government programs. We esmate
Medicaid and other government programs rebates based upon a range of possible outcomes that are probability-weighted for the esmated payor
mix. For Medicare, we also esmate the number of paents in the prescripon drug coverage gap for whom we will owe an addional liability under
the Medicare Part D program. Our liability for these rebates consists of invoices received for claims from prior quarters that have not been paid or
for which an invoice has not yet been received, esmates of claims for the current quarter, and esmated future claims that will be made for product
that has been recognized as revenue, but which remains in the distribuon channel at the end of each reporng period.

• Other Incenves—Other incenves that we offer include voluntary paent assistance programs such as our co-pay assistance program, which are
intended  to  provide  financial  assistance  to  qualified  commercially  insured  paents  with  prescripon  drug  co-payments  required  by  payors.  The
calculaon of the accrual for co-pay assistance is based on actual claims processed during a given period, as well as historical ulizaon data to
esmate the amount we expect to receive associated with product that has been recognized as revenue, but remains in in the distribuon channel
at the end of each reporng period.

Overall, these reserves reflect our best esmates of the amount of consideraon to which we are entled based on the terms of the respecve underlying
contracts. Our calculaon of the reserves, include esmates and judgments that materially affect our recognion of net product revenues. Changes in our
esmates of net product revenues could have a material effect on net product revenues recorded in the period in which we determine that change occurs.

Research and Development Expense

R&D  costs  are  expensed  as  incurred.  Internal  R&D  expenses  are  comprised  of  costs  incurred  in  providing  R&D  acvies,  including  salaries  and  bonuses,
employee benefits and stock-based compensaon for personnel engaged in R&D acvies. In addion, they include facility costs, including the laboratory and
an allocaon of office space for ulizaon by R&D staff, depreciaon expense on the laboratory equipment as well as other direct costs such as lab supplies.

External  R&D  costs  include  development  of  potenal  new  manufacturing  processes  and  methods  for  both  commercial  and  non-commercial  products,
conceptual  formulaon  and  design  of  possible  product  and  process  alternaves  for  commercial  and  non-commercial  products,  research  compounds  and
clinical manufacturing costs, costs incurred for consultants and other outside services, such as data management and stascal analysis support and materials
and supplies used in support of the clinical and preclinical programs and costs paid to CROs including invesgave sites that conduct our clinical trials.

We also expense pre-launch inventory to R&D unl approval from the respecve regulatory body is obtained.

We esmate certain costs and expenses and accrue for these liabilies as part of our process of preparing financial statements. Examples of areas in which
subjecve  judgments  may  be  required  include,  among  other  things,  costs  associated  with  services  provided  by  contract  organizaons  for  preclinical
development and manufacturing of our product candidates and clinical trials. We accrue for costs incurred as the services are being provided by monitoring
the status of the trial or services provided, and the invoices received from our external service providers which can at mes be significantly delayed. As actual
costs become known to us, we adjust our accruals. To date, our esmates have not differed materially from the actual costs incurred. However, subsequent
changes in esmates may result in a material change in our accruals, which could also materially affect our balance sheet and results of operaons.

Item 7A. Quantave and Qualitave Disclosures about Market Risk

We are a smaller reporng company as defined by Rule 12b-2 of the Exchange Act, and are not required to provide informaon under this item.

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Table of Contents

Item 8. Financial Statements and Supplementary Data

Index to Consolidated Financial Statements

Report of Independent Registered Public Accounng Firm (PCAOB ID: 42)

Consolidated Balance Sheets

Consolidated Statements of Operaons and Comprehensive Loss

Consolidated Statements of Stockholders’ (Deficit) Equity

Consolidated Statements of Cash Flows

Notes to Consolidated Financial Statements

Page

126

128

129

130

131

132

All  financial  statement  schedules  have  been  omied,  since  the  required  informaon  is  not  applicable  or  is  not  present  in  amounts  sufficient  to  require
submission of the schedule, or because the informaon required is included in the consolidated financial statements and accompanying notes.

Akebia Therapeucs, Inc. | Form 10-K | Page 125

Table of Contents

To the Stockholders and the Board of Directors of Akebia Therapeucs, Inc.

Opinion on the Financial Statements

Report of Independent Registered Public Accounng Firm

We have audited the accompanying consolidated balance sheets of Akebia Therapeucs, Inc. (the Company) as of December 31, 2023 and 2022, the related
consolidated statements of operaons and comprehensive loss, stockholders' (deficit) equity and cash flows for each of the two years in the period ended
December  31,  2023,  and  the  related  notes  (collecvely  referred  to  as  the  “consolidated  financial  statements”).  In  our  opinion,  the  consolidated  financial
statements present fairly, in all material respects, the financial posion of the Company at December 31, 2023 and 2022, and the results of its operaons and
its cash flows for each of the two years in the period ended December 31, 2023, in conformity with U.S. generally accepted accounng principles.

We also have audited, in accordance with the standards of the Public Company Accounng Oversight Board (United States) (PCAOB), the Company's internal
control over financial reporng as of December 31, 2023, based on criteria established in Internal Control-Integrated Framework issued by the Commiee of
Sponsoring Organizaons of the Treadway Commission (2013 framework) and our report dated March 14, 2024 expressed a qualified opinion thereon.

Basis for Opinion

These  financial  statements  are  the  responsibility  of  the  Company's  management.  Our  responsibility  is  to  express  an  opinion  on  the  Company’s  financial
statements based on our audits. We are a public accounng firm registered with the PCAOB and are required to be independent with respect to the Company
in accordance with the U.S. federal securies laws and the applicable rules and regulaons of the Securies and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable
assurance  about  whether  the  financial  statements  are  free  of  material  misstatement,  whether  due  to  error  or  fraud.  Our  audits  included  performing
procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond
to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits
also included evaluang the accounng principles used and significant esmates made by management, as well as evaluang the overall presentaon of the
financial statements. We believe that our audits provide a reasonable basis for our opinion.

Crical Audit Maer

The  crical  audit  maer  communicated  below  is  a  maer  arising  from  the  current  period  audit  of  the  financial  statements  that  was  communicated  or
required to be communicated to the audit commiee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2)
involved our especially challenging, subjecve or complex judgments. The communicaon of the crical audit maer does not alter in any way our opinion on
the consolidated financial statements, taken as a whole, and we are not, by communicang the crical audit maer below, providing a separate opinion on
the crical audit maer or on the accounts or disclosures to which it relates.

Akebia Therapeucs, Inc. | Form 10-K | Page 126

Table of Contents

Descripon of the
Maer

Revenue Recognion - Payor Mix Impact on Measuring Variable Consideraon, Specifically Payor Rebates
As of December 31, 2023, the Company recorded accrued product revenue allowances of $29.9 million, which
includes  payor  rebates.  As  discussed  in  Note  2  to  the  Company’s  consolidated  financial  statements,  the
Company  recognizes  revenue  from  product  sales  at  the  net  sales  price  (transacon  price),  which  includes
esmates  of  variable  consideraon  for  which  reserves  are  established.  The  Company  contracts  with  various
commercial payor organizaons, primarily health insurance companies and pharmacy benefit managers, for the
payment  of  rebates  with  respect  to  ulizaon  of  its  products.  The  Company  esmates  the  rebates  for  payors
based  upon  (i)  its  contracts  with  the  payors  and  (ii)  informaon  obtained  from  its  customers  and  other  third
pares regarding the payor mix. The Company esmates these payor rebates and records such esmates in the
same  period  the  related  revenue  is  recognized,  resulng  in  a  reducon  of  product  revenue  and  the
establishment of an accrued liability.

Auding  the  measurement  of  the  Company’s  net  product  revenues  was  complex  and  judgmental  due  to  the
significant  esmaon  required  in  determining  the  amount  of  consideraon  that  will  be  collected  net  of
esmates for payor rebates. In parcular, the payor rebate is affected by assumpons in payor behavior such as
changes in payor mix, payor collecons and current customer contractual requirements.

How We Addressed
the Maer in Our
Audit

We obtained an understanding, evaluated the design and tested the operang effecveness of controls over the
Company’s revenue recognion process, including controls over the underlying assumpons and inputs used by
management to esmate the payor rebates. Specifically, this included controls to assess the completeness and
accuracy of the current and historical data used in calculang the esmate.

Our  audit  procedures  to  test  the  Company’s  recognion  of  net  product  revenues  and  specifically  the  variable
consideraon  component  of  payor  rebates  included,  among  others,  assessing  the  methodology  used  to
determine the esmate and tesng the significant assumpons and the underlying data used by the Company
in  its  analysis.  This  included  tesng  the  reasonableness  of  management’s  esmates  to  other  inputs  into  their
calculaons  such  as  contract  terms,  product  in  the  distribuon  channel,  and  actual  invoices  received.  We
assessed the historical accuracy of management’s esmates by comparing actual acvity to previous esmates
and performed analycal procedures to evaluate the completeness of the payor rebate reserves.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2013.

Boston, Massachuses
March 14, 2024

Akebia Therapeucs, Inc. | Form 10-K | Page 127

 
 
 
 
 
AKEBIA THERAPEUTICS, INC.
CONSOLIDATED BALANCE SHEETS

Table of Contents

(dollars in thousands, except per share amounts)
Assets
Current assets:

Cash and cash equivalents
Inventories
Accounts receivable, net
Prepaid expenses and other current assets

Total current assets
Property and equipment, net
Operang right-of-use assets
Intangible asset, net
Goodwill
Other long-term assets
Total assets

Liabilies and stockholders' (deficit) equity
Current liabilies:

Accounts payable
Accrued expenses and other current liabilies
Short-term deferred revenue
Current poron of long-term debt

Total current liabilies
Deferred revenue, net of current poron
Long-term operang lease liabilies
Embedded debt derivave
Long-term debt, net
Liability related to sale of future royales
Refund liability to customer
Other long-term liabilies
Total liabilies
Commitments and conngencies (Note 10)
Stockholders' (deficit) equity:
Preferred stock $0.00001 par value, 25,000,000 shares authorized; no shares issued and outstanding at
December 31, 2023 and 2022
Common stock: $0.00001 par value; 350,000,000 shares authorized at December 31, 2023 and 2022; 194,582,539
and 184,135,714 shares issued and outstanding at December 31, 2023 and 2022, respecvely
Addional paid-in capital
Accumulated other comprehensive income
Accumulated deficit
Total stockholders' (deficit) equity
Total liabilies and stockholders' (deficit) equity

December 31,

2023

2022

42,925  $
15,691 
39,290 
20,243 
118,149 
3,629 
12,416 
36,042 
59,044 
12,423 
241,703  $

14,635  $
67,735 
— 
17,500 
99,870 
43,296 
8,947 
— 
17,183 
54,013 
40,093 
8,885 
272,287 

90,466 
21,568 
40,284 
32,864 
185,182 
5,214 
29,158 
72,084 
59,044 
5,372 
356,054 

18,021 
75,777 
3,738 
32,000 
129,536 
43,296 
28,961 
760 
34,078 
57,484 
40,992 
15,717 
350,824 

— 

2 
1,578,358 
6 
(1,608,950)
(30,584)
241,703  $

— 

2 
1,562,247 
6 
(1,557,025)
5,230 
356,054 

$

$

$

$

 The accompanying notes are an integral part of these consolidated financial statements.

Akebia Therapeucs, Inc. | Form 10-K | Page 128

 
 
 
 
 
Table of Contents

AKEBIA THERAPEUTICS, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(dollars in thousands, except per share amounts)

Revenues:

Product revenue, net
License, collaboraon and other revenue

Total revenues

Cost of goods sold:

Cost of product and other revenue
Amorzaon of intangible asset

Total cost of goods sold

Operang expenses:

Research and development
Selling, general and administrave
License
Restructuring

Total operang expenses

Loss from operaons
Other income (expense):
Interest expense
Other income
Loss on exnguishment of debt
Loss on terminaon of lease

Net loss before income taxes
Net loss

Comprehensive loss

Net loss per share:

Basic and diluted

Weighted average number of common shares outstanding:

Basic and diluted

Years Ended December 31,
2022
2023

$

$
$

170,301  $
24,322 
194,623 

38,107 
36,042 
74,149 

63,079 
100,233 
3,237 
181 
166,730 
(46,256)

(6,032)
887 
— 
(524)
(51,925)
(51,925) $
(51,925) $

176,949 
115,535 
292,484 

49,526 
36,042 
85,568 

129,986 
138,601 
3,175 
15,933 
287,695 
(80,779)

(15,687)
3,146 
(906)
— 
(94,226)
(94,226)
(94,226)

$(0.28)

$(0.52)

187,465,448 

182,782,680 

The accompanying notes are an integral part of these consolidated financial statements.

Akebia Therapeucs, Inc. | Form 10-K | Page 129

 
 
 
 
 
Table of Contents

(dollars in thousands)

Balance at December 31, 2021

Akebia Therapeucs, Inc.
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY 

Common Stock

Shares

Amount

Addional 
Paid-In Capital

Accumulated
Other
Comprehensive
Income (Loss)

177,000,963 $

1  $

1,536,800  $

Accumulated
Deficit 
(1,462,799) $

6  $

Total
Stockholders'
(Deficit) Equity
74,008 

Issuance of common stock, net of issuance costs
Proceeds from sale of stock under employee stock purchase plan
Stock-based compensaon expense
Restricted stock unit vesng
Exercise of opons
Net loss

Balance at December 31, 2022

Issuance of common stock, net of issuance costs
Proceeds from sale of stock under employee stock purchase plan
Stock-based compensaon expense
Restricted stock unit vesng
Exercise of opons
Net loss

Balance at December 31, 2023

4,404,600
335,146
—
2,252,565
142,440
—

184,135,714 $

6,189,974
200,194
—
4,054,407
2,250
—

194,582,539 $

1 
— 
— 
— 
— 
— 
2  $

— 
— 
— 
— 
— 
— 
2  $

7,121 
410 
17,849 
— 
67 
— 

1,562,247  $

6,708 
85 
9,317 
— 
1 
— 

1,578,358  $

— 
— 
— 
— 
— 
— 
6  $

— 
— 
— 
— 
— 
— 
6  $

— 
— 
— 
— 
— 
(94,226)
(1,557,025) $

— 
— 
— 
— 
— 
(51,925)
(1,608,950) $

7,122 
410 
17,849 
— 
67 
(94,226)
5,230 

6,708 
85 
9,317 
— 
1 
(51,925)
(30,584)

The accompanying notes are an integral part of these consolidated financial statements.

Akebia Therapeucs, Inc. | Form 10-K | Page 130

 
 
 
Table of Contents

Akebia Therapeucs, Inc.
CONSOLIDATED STATEMENT OF CASH FLOWS

(dollars in thousands)

Operang Acvies:

Net loss
Adjustments to reconcile net loss to net cash used in operang acvies:

Depreciaon expense
Amorzaon of intangible asset
Interest expense related to sale of future royales (non-cash)
Accreon of interest expense and amorzaon of refund liability
Royalty revenue from MTPC (non-cash)
Collaboraon revenue in connecon with the terminaon of the Otsuka Agreement (non-cash)
R&D expense in connecon with the terminaon of the Otsuka Agreement (non-cash)
Amorzaon of right-of-use assets
Write-off on terminaon of Boston Lease (non-cash)
Loss on exnguishment of debt
Provision of inventories
Change in firm purchase commitments
Stock-based compensaon expense
Change in fair value of embedded debt derivave
Changes in operang assets and liabilies:

Accounts receivable
Inventories
Prepaid expenses and other current assets
Other long-term assets
Accounts payable
Accrued expense and other current liabilies
Lease liabilies
Deferred revenue
Other long-term liabilies

Net cash used in operang acvies
Invesng Acvies:

Purchase of property and equipment

Net cash provided by (used in) invesng acvies
Financing Acvies:

Proceeds from refund liability to customer
Proceeds from the issuance of common stock, net of issuance costs
Proceeds from the sale of stock under employee stock purchase plan
Proceeds from the exercise of common stock opons
Principal payments on debt

Net cash (used in) provided by financing acvies
Decrease in cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash at beginning of the period
Cash, cash equivalents and restricted cash at end of the period
Supplemental disclosure of cash flow informaon:
Cash paid for interest

Years Ended December 31,
2022
2023

$

(51,925) $

(94,226)

1,585 
36,042 
— 
(2,228)
(1,977)
— 
782 
4,219 
(825)
— 
1,580 
1,533 
9,317 
(760)

994 
(2,542)
11,839 
(1,361)
(5,244)
(10,021)
(4,963)
(3,738)
(5,691)
(23,384)

— 
— 

— 
6,708 
85 
1 
(32,000)
(25,206)
(48,590)
93,169 
44,579  $

1,654 
36,043 
6,182 
2,121 
(1,777)
(9,550)
8,768 
(2,417)
— 
406 
30,242 
(65,946)
17,849 
(1,060)

11,297 
19,087 
1,058 
(5,623)
1,501 
(38,005)
2,311 
4,654 
2,277 
(73,154)

(114)
(114)

40,000 
7,121 
410 
67 
(33,000)
14,598 
(58,670)
151,839 
93,169 

6,059  $

6,755 

$

$

The accompanying notes are an integral part of these consolidated financial statements.

Akebia Therapeucs, Inc. | Form 10-K | Page 131

 
Table of Contents

1. NATURE OF BUSINESS

Organizaon

Akebia Therapeucs, Inc.
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

Akebia Therapeucs, Inc., referred to as Akebia or the Company, was incorporated in the State of Delaware in 2007 and became a public company in 2014.
Akebia is a fully integrated commercial-stage biopharmaceucal company commied to addressing paents’ unmet needs. Our purpose is to beer the life of
each person impacted by kidney disease.

®
The Company has one commercial product in the United States, or U.S, Auryxia  (ferric citrate), which is approved by the U.S. Food and Drug Administraon,
or FDA, and marketed for two indicaons: (i) the control of serum phosphorus levels in adult paents with dialysis dependent chronic kidney disease, or DD-
CKD,  and  (ii)  the  treatment  of  iron  deficiency  anemia,  or  IDA,  in  adult  paents  with  non-dialysis  chronic  kidney  disease,  or  NDD-CKD.  Auryxia  will  lose
exclusivity in the U.S. in March 2025.

Ferric  citrate  is  also  approved  in  Japan,  and  is  marketed  and  sold  by  the  Company's  collaboraon  partner,  as  an  oral  treatment  for  the  improvement  of
hyperphosphatemia in paents with chronic kidney disease, or CKD, including DD-CKD and NDD-CKD and for the treatment of adult paents with IDA under
the trade name Riona (ferric citrate hydrate).

The  Company  has  early  to  late-stage  clinical  programs,  including  vadadustat,  the  Company’s  lead  invesgaonal  product  candidate.  Vadadustat  is  an
invesgaonal  oral  hypoxia-inducible  factor  prolyl  hydroxylase,  or  HIF-PH,  inhibitor.  In  October  2023,  the  FDA  acknowledged  the  Company's  New  Drug
Applicaon, or NDA, resubmission for vadadustat was complete, classified it as a Class 2 response and set a user fee goal date, or PDUFA date, of March 27,
2024.

Vadadustat is approved for the treatment of symptomac anemia associated with CKD under the trade name Vafseo in the European Economic Area, or EEA,
the  United  Kingdom,  or  UK,  Switzerland,  Australia  and  Taiwan  in  adult  paents  on  chronic  maintenance  dialysis,  in  Korea  for  adult  paents  with  CKD  on
hemodialysis and in Japan for adult dialysis-dependent and non-dialysis paents. The Company will connue to support its partners in preparaon to launch
vadadustat in Europe, Taiwan and potenally other countries to pursue our goal of enabling broad access to vadadustat for paents globally.

Since its incepon, the Company has devoted most of its resources to research and development, or R&D, including its preclinical and clinical development
acvies, commercializing Auryxia and providing general and administrave support for these operaons. The Company began recording revenue from the
U.S. sales of Auryxia and revenue from sublicensing rights to Auryxia in Japan from the Company’s Japanese partners, Japan Tobacco, Inc. and its subsidiary
Torii  Pharmaceucal  Co.,  Ltd.,  collecvely,  JT  and  Torii,  in  2018.  In  addion,  the  Company  connues  to  explore  addional  development  opportunies  to
expand its pipeline and porolio of novel therapeucs. If the Company does not successfully commercialize vadadustat in the U.S., if approved, or any other
potenal product candidate, it may be unable to achieve profitability.

As of December 31, 2023, the Company had cash and cash equivalents of approximately $42.9 million. Based on its current operang plan, the Company
believes that its cash resources and the cash the Company expects to generate from product, royalty, supply and license revenues will be sufficient to allow
the Company to fund its current operang plan through at least twelve months from the filing of this Annual Report on Form 10-K, or Form 10-K. However, if
the Company’s operang performance deteriorates significantly from the levels expected in the Company’s operang plan, or if vadadustat is not approved in
the U.S., it would affect the Company’s liquidity and its ability to connue as a going concern in the future. The Company expects to finance future cash needs
through product and collaboraon, license and other revenue, including royales and revenue from supply agreements. If the Company believes its resources
are insufficient to sasfy its liquidity requirements, we may seek to sell public or private equity, enter into new debt transacons, explore potenal strategic
transacons,  consider  other  cash-generang  or  saving  measures  or  a  combinaon  of  these  approaches  or  other  strategic  alternaves.  There  can  be  no
assurance that the current operang plan will be achieved in the me frame ancipated by the Company or that its cash resources will fund its operang plan
for the period of me ancipated by the Company, or that addional funding will be available on terms acceptable to the Company, or at all.

2.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentaon and Principles of Consolidaon

The accompanying consolidated financial statements have been prepared in conformity with accounng principles generally accepted in the U.S., or GAAP.
Any reference in these notes to applicable guidance is meant to refer to the authoritave GAAP as found in the Accounng Standards Codificaon, or ASC,
and Accounng Standards Update, or ASU, of the Financial Accounng Standards Board, or FASB.

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Table of Contents

The accompanying consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany
balances and transacons have been eliminated in the consolidated financial statements herein.

Certain  monetary  amounts,  percentages  and  other  figures  included  elsewhere  in  these  consolidated  financial  statements  have  been  subject  to  rounding
adjustments.  Accordingly,  figures  shown  as  totals  in  certain  tables  may  not  be  the  arithmec  aggregaon  of  the  figures  that  precede  them,  and  figures
expressed as percentages in the text may not total 100% or, as applicable, when aggregated, may not be the arithmec aggregaon of the percentages that
precede them.

Use of Esmates

The preparaon of financial statements in conformity with GAAP, requires management to make esmates and assumpons that affect the reported amounts
of assets and liabilies, revenue and expenses, classificaon of the expenses, assets and liabilies and the disclosure of conngent assets and liabilies as of
and during the reported period. On an ongoing basis, management evaluates its esmates. Management bases its esmates and assumpons on historical
experience  when  available  and  on  various  factors,  including  expected  business  and  operaonal  changes,  sensivity  and  volality  associated  with  the
assumpon that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of
the assets and liabilies that are not readily apparent from other sources. In certain circumstances, management must apply significant judgment in these
processes. The esmaon process oen may yield a range of potenally reasonable esmates of the ulmate future outcomes, and management selects an
amount that falls within that range of reasonable esmates. Although, we regularly assesses these esmates, actual results may differ materially from those
esmates and changes in esmates are recorded in the period they become known.

Significant esmates and judgments reflected in these consolidated financial statements include, but are not limited to: accrued expenses, other long-term
liabilies, product revenues, including various rebates, returns and reserves related to product sales, inventories, classificaon of expenses between cost of
goods sold, R&D and selling, general and administrave, long-term assets, including the Company's right-of-use assets, intangible asset and goodwill.

Cash, Cash Equivalents and Restricted Cash

In determining cash, cash equivalents and restricted cash, the Company considers only those highly liquid investments, readily converble to cash within 90
days  from  the  date  of  purchase  to  be  cash  equivalents.  As  of  December  31,  2023,  cash  and  cash  equivalents  primarily  included  cash  on  hand  and  funds
invested in money market funds.

Restricted  cash  represents  amounts  required  to  secure  the  outstanding  leer  of  credit  in  connecon  with  the  Company’s  office  and  laboratory  space  in
Cambridge, Massachuses, or the Cambridge Lease. Restricted cash is included in “other long-term assets” in the consolidated balance sheets.

The following table reconciles cash, cash equivalents and restricted cash reported within the Company's consolidated balance sheets to the total amounts
reported 

consolidated 

statements 

flows: 

cash 

the 

of 

in 

Reconciliaon of cash, cash equivalents and restricted cash (in thousands)
Cash and cash equivalents
Restricted cash included in other long-term assets

Total cash, cash equivalents and restricted cash

Fair Value of Financial Instruments

December 31,

2023

2022

$

$

42,925  $
1,654 
44,579  $

90,466 
2,703 
93,169 

Fair  value  is  defined  as  the  price  that  would  be  received  from  selling  an  asset  or  paid  to  transfer  a  liability  in  an  orderly  transacon  between  market
parcipants  at  the  measurement  date.  When  determining  the  fair  value  measurements  for  assets  and  liabilies  required  to  be  recorded  at  fair  value,
management considers the principal or most advantageous market in which it would transact and considers assumpons that market parcipants would use
when pricing the asset or liability. ASC Topic 820, Fair Value Measurement, establishes a fair value hierarchy that requires an enty to maximize the use of
observable inputs and minimize the use of unobservable inputs when measuring fair value. To the extent the valuaon is based on models or inputs that are
less observable in the market, the determinaon of fair values requires more judgment. A financial instrument categorizaon within the fair value hierarchy is
based upon the lowest level of input that is significant to the fair value measurement. The three levels of inputs that may be used to measure fair value are:

•

•

Level 1 – unadjusted quoted prices in acve markets for idencal assets or liabilies to the reporng enty at     the measurement date.

Level 2 – quoted prices for similar assets or liabilies in markets that are not acve, or for which all significant inputs are observable, either
directly or indirectly, for substanally the full term of the asset or liability.

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•

Level 3 – unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby
allowing for situaons in which there is lile, if any, market acvity for the asset or liability at the measurement date.

Accounts Receivable

The Company’s accounts receivable represent amounts due to the Company from product sales (see Note 11) and from its collaboraon, license and other
agreements  (see  Note  12).  Reimbursable  costs  that  have  not  been  invoiced  as  of  the  balance  sheet  date  are  recorded  as  unbilled  accounts  receivable.
Accounts receivable arising from product sales primarily represent amounts due from the Company's customers, net of allowances for customer discounts
and chargebacks. The Company deducts trade allowances for prompt payment, among other certain discounts or chargebacks, from its accounts receivable
based on its experience that the Company’s customers will earn these discounts and fees.

The  Company  makes  judgments  as  to  its  ability  to  collect  outstanding  receivables  and  provides  an  allowance  for  receivables  when  collecon  becomes
doubul. Provisions are made based upon a specific review of all significant outstanding receivables and the overall quality and age of those invoices not
specifically  reviewed  as  well  as  historical  payment  paerns  and  exisng  economic  factors.  The  Company  believes  that  credit  risks  associated  with  its
customers and collaboraon partners are not significant. The Company's allowance for credit losses was $1.0 million and $1.1 million as of December 31,
2023 and 2022, respecvely. The write-offs for the year ended December 31, 2023 and 2022 were $0.1 million and $0.4 million, respecvely.

Concentraons of Risk and Off-Balance Sheet Risk

Credit Risk

Cash, cash equivalents and accounts receivable are the only financial instruments that potenally subject the Company to concentraons of credit risk. The
Company  maintains  cash  accounts  principally  at  three  financial  instuons  in  the  U.S.,  which  at  mes,  may  exceed  the  Federal  Deposit  Insurance
Corporaon's limits. The Company has not experienced any losses from cash balances in excess of the insurance limit. The Company's management does not
believe the Company is exposed to significant credit risk at this me due to the financial condion of the financial instuons where its cash is held.

Gross revenues and accounts receivable from each of the Company’s customers or collaboraon partners who individually accounted for 10% or more of total
gross revenues and/or 10% or more of total gross accounts receivable consisted of the following:

Customer
Fresenius Medical Care Rx
Cencora, Inc., formerly known as AmerisourceBergen Drug Corporaon
McKesson Corporaon
Cardinal Health, Inc.
Otsuka Pharmaceucal Co. Ltd.

Customer
Fresenius Medical Care Rx
Cencora, Inc., formerly known as AmerisourceBergen Drug Corporaon
Cardinal Health, Inc.
McKesson Corporaon

Off-Balance Sheet Accounts

% of Total Gross Revenues
Years Ended December 31,
2022
2023
34%
40%
15%
21%
—%
11%
—%
10%
20%
—%

% of Gross Accounts Receivable
December 31,

2023
31%
25%
16%
12%

2022
44%
16%
13%
10%

The  Company  has  no  significant  off-balance  sheet  concentraons  of  credit  risk,  such  as  foreign  currency  exchange  contracts,  opon  contracts  or  other
hedging arrangement. See Note 9, Leases, for further details.

Manufacturing and Distribuon Risk.

The Company is dependent on third-party manufacturers, logiscs company and distributors to supply products for commercial acvies associated with its
product and product candidates, as applicable. In parcular, the Company relies and

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expects to connue to rely on a small number of manufacturers to supply it with its requirements for the acve pharmaceucal ingredients and formulated
drugs  related  to  the  Company's  product  and  product  candidate  acvies.  These  acvies,  including  the  commercializaon  of  Auryxia,  could  be  adversely
affected  by  a  significant  interrupon  in  the  supply  of  acve  pharmaceucal  ingredients  and  formulated  drugs  or  distribuon  of  finished  product  to  the
market.

Inventories, including Pre-Launch Inventories

The Company values its inventories at the lower-of-actual cost or net realizable value. The Company determines the cost of its inventories, which includes
amounts related to materials and manufacturing overhead, on a first-in, first-out basis. When the Company expects to ulize the inventory beyond one year
we record it in inventories, long-term on its consolidated balance sheets.

Prior  to  obtaining  inial  regulatory  approval  for  an  invesgaonal  product  candidate  the  Company  expenses  costs  relang  to  producon  of  pre-launch
inventory as R&D expense in its consolidated statements of operaons and comprehensive loss in the period incurred. Aer regulatory approval has been
received,  the  Company  capitalizes  such  inventory  costs.  Products  used  in  clinical  trials  are  expensed  as  R&D  expense  in  the  statement  of  operaons  and
comprehensive loss. 

The Company performs an assessment of the recoverability of capitalized inventory during each reporng period, and writes down any excess or obsolete
inventory  to  its  net  realizable  value  in  the  period  in  which  the  impairment  is  idenfied  through  cost  of  product  and  other  revenue  in  the  consolidated
statements of operaons and comprehensive loss.

Addionally, the Company’s product is subject to strict quality control and monitoring that is performed throughout the manufacturing process, including
release of work-in-process to finished goods. In the event that certain batches or units of product do not meet quality specificaons, the Company will record
a write-down of any potenal unmarketable inventory to its esmated net realizable value and record the expense as cost of product and other revenue in
the consolidated statements of operaons and comprehensive loss.

The  Company  prepays  for  certain  manufacturing  costs,  including  the  raw  materials  to  its  CMOs  which  are  included  in  prepaid  manufacturing  on  the
consolidated balance sheet.

Property and Equipment

Property  and  equipment  are  recorded  at  cost,  less  accumulated  depreciaon.  Expenditures  for  repairs  and  maintenance  are  expensed  as  incurred.
Depreciaon expense is recognized using the straight-line method over the esmated useful lives, which are typically:

Computer equipment and soware
Furniture and fixtures
Laboratory and other equipment
Leasehold improvements

Asset Category

Esmated Useful Life
3 years
-
7 years
Shorter of the useful life or remaining lease
term

7 years

5 years

Maintenance and repairs to an asset that do not improve or extend its life are charged to operaons. When assets are rered or otherwise disposed of, the
assets  and  related  accumulated  depreciaon  are  eliminated  from  the  accounts  and  any  resulng  gain  or  loss  is  reflected  in  the  Company's  consolidated
statements of operaons and comprehensive loss.

Intangible Asset

The Company maintains a definite-lived intangible asset related to developed product rights for Auryxia. The intangible asset was inially recorded at fair
value  and  is  stated  net  of  accumulated  amorzaon.  The  Company  amorzes  its  intangible  asset  that  has  a  finite  life  using  the  straight-line  method.
Amorzaon for the Company’s intangible asset is recorded over its remaining esmated useful life, which as of December 31, 2023 is esmated to be six
years.

Goodwill

Goodwill reflects the excess purchase price over the fair value of the net tangible and intangible assets acquired in a business combinaon.

Goodwill is evaluated for impairment on an annual basis, and more frequently if indicators are present or changes in circumstances suggest that impairment
may exist. The Company compares the fair value of its reporng unit to its carrying value. If the carrying value of the net assets assigned to the reporng unit
exceeds the fair value of its reporng unit, the Company would record an impairment loss equal to the difference. As described above, the Company operates
in one operang segment which the Company considers to be the only reporng unit.

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Impairment of Long-Lived Assets and Intangible Assets Subject to Amorzaon

Long-lived assets primarily include property and equipment, intangible assets. The Company evaluates its long-lived assets for impairment whenever events
or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. The recoverability of assets to be held and used is
measured by a comparison of the carrying amount of an asset to the future undiscounted net cash flows expected to be generated by the asset. If such assets
are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the asset exceeds the fair value
of the asset.

The Company did not recognize any impairment losses on long-lived assets for the years ended December 31, 2023 and 2022, respecvely.

Leases

The Company made an accounng policy elecon not to recognize leases with an inial term of twelve months or less within its consolidated balance sheets
and  to  recognize  those  lease  payments  as  an  expense  on  a  straight-line  basis  in  its  consolidated  statements  of  operaons  and  comprehensive  loss.  The
Company also made the accounng policy elecon not to separate the non-lease components from the lease components for its building leases and, rather,
account for each non-lease component and lease component as a single component.

The Company determines if an arrangement is a lease at incepon. An arrangement is determined to contain a lease if the contract conveys the right to
control the use of an idenfied property, plant or equipment for a period of me in exchange for consideraon. If the Company can benefit from the various
underlying assets of a lease on their own or together with other resources that are readily available, or if the various underlying assets are neither highly
dependent on nor highly interrelated with other underlying assets in the arrangement, they are considered to be a separate lease component. In the event
mulple underlying assets are idenfied, the lease consideraon is allocated to the various components based on each of the component’s relave fair value.

Operang lease assets represent the Company’s right to use an underlying asset for the lease term and operang lease liabilies represent its obligaon to
make lease payments arising from the leasing arrangement. The right-of-use asset and operang lease liabilies are recognized at the commencement date
based on the present value of lease payments over the lease term. The Company uses the implicit rate when readily determinable and uses an esmate of its
incremental  borrowing  rate  when  the  implicit  rate  is  not  readily  determinable  based  upon  the  available  informaon  at  the  commencement  date  of  lease
incepon.  The  incremental  borrowing  rate  is  determined  using  a  credit  rang  scoring  model  to  esmate  the  Company’s  credit  rang,  adjusted  for
collateralizaon. The calculaon of the right-of-use asset includes any lease payments made and excludes any lease incenves. If a lease includes an opon to
extend or terminate the lease, the Company reflects the opon in the lease term if it is reasonably certain the Company will exercise the opon.

The Company’s operang leases are reflected in operang right-of-use assets, accrued expenses and other current liabilies and long-term operang lease
liabilies in its consolidated balance sheets.

Derivave Financial Instruments

The Company accounts for derivave financial instruments as either equity or liabilies in accordance with ASC Topic 815, Derivaves and Hedging, or ASC
815,  based  on  the  characteriscs  and  provisions  of  each  instrument.  Embedded  derivaves  are  required  to  be  bifurcated  from  the  host  instruments  and
recorded at fair value if the derivaves are not clearly and closely related to the host instruments on the date of issuance. Derivave instrument liabilies are
classified in the consolidated balance sheets as current or non-current based on whether or not net-cash selement of the derivave instrument could be
required within 12 months of the balance sheet date. The embedded derivaves are revalued on each subsequent balance sheet date unl such instruments
are exercised or expire, with any changes in the fair value between reporng periods recorded as other income or expense in the consolidated statements of
operaons and comprehensive loss. The derivave liability recorded in connecon with the Company’s prior Loan Agreement with Pharmakon was classified
as a liability in the Company’s consolidated balance sheets. See Note 3, Fair Value Measurements, and Note 7, Indebtedness, for more informaon.

Liability Related to Sale of Future Royales

The Company accounts for the liability related to sale of future royales as a debt financing, amorzed under the effecve interest rate method over the
esmated life of the related expected royalty stream. The liability related to sale of future royales and the debt amorzaon are based on the Company’s
current  esmates  of  future  royales  expected  to  be  paid  over  the  life  of  the  arrangement.  The  Company  will  periodically  assess  the  expected  royalty
payments. To the extent the Company’s esmates of future royalty payments are greater or less than previous esmates or the esmated ming of such
payments is materially different than previous esmates, the Company will adjust the effecve interest rate and recognize related non-cash interest expense
on a prospecve basis. In the event the Company's esmates of future royales are less

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than the proceeds from the sale of future royales, the Company will not recognize related non-cash interest expense. Non-cash royalty revenue is reflected
as royalty revenue within License, collaboraon and other revenue, and non-cash amorzaon of debt is reflected as interest expense in the consolidated
statements of operaons and comprehensive loss. See Note 8, Deferred Revenue, Refund Liability and Liability Related to Sale of Future Royales, for more
informaon.

Refund Liability to Customer

The  Company  accounts  for  the  refund  liability  as  a  debt  arrangement,  which  is  recorded  at  net  present  value.  When  the  funds  were  received  from  the
customer,  the  Company  recorded  an  inial  discount  on  the  refund  liability  and  a  corresponding  deferred  gain  to  the  refund  liability.  The  discount  on  the
refund liability is being amorzed to interest expense on the consolidated statement of operaons and comprehensive loss and the deferred gain is being
amorzed to other income on the consolidated statement of operaons and comprehensive loss over the expected term of the arrangement. See Note 8,
Deferred Revenue, Refund Liability and Liability Related to Sale of Future Royales, for more informaon.

Excess Firm Purchase Commitment Liabilies

At  each  reporng  period,  the  Company  assesses  whether  there  are  excess  firm  non-cancelable  purchase  commitment  liabilies,  resulng  from  supply
agreements with third-party CMOs. The determinaon of excess firm purchase commitment liabilies requires judgment, including consideraon of many
factors, such as esmates of future product demand, current and future market condions, impact of our loss of exclusivity, expiraon and ulizaon of drug
substance  under  firm  purchase  commitments,  and  contractual  minimums.  Inventory  receipts,  if  any,  that  have  been  previously  idenfied  as  excess  are
recorded as a reducon to the firm purchase commitment liability. Any changes in the firm purchase commitment liability are recorded in cost of product and
other revenue in the consolidated statements of operaons and comprehensive loss.

Revenue Recognion

The Company recognizes revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers, or ASC 606, which applies to all contracts with
customers, except for contracts that are within the scope of other standards. Under ASC 606, the Company recognizes revenue when its customer obtains
control  of  promised  goods  or  services,  in  an  amount  that  reflects  the  consideraon  which  the  enty  expects  to  receive  in  exchange  for  those  goods  or
services. To determine revenue recognion for arrangements that the Company determines are within the scope of ASC 606, it performs the following five
steps:

(i)

idenfy the contract(s) with a customer;

(ii)

idenfy the performance obligaons in the contract;

(iii) determine the transacon price;

(iv) allocate the transacon price to the performance obligaons in the contract; and

(v) recognize revenue when (or as) the enty sasfies a performance obligaon. 

The Company only applies the five-step model to contracts when it is probable that the enty will collect the consideraon it is entled to in exchange for the
goods  or  services  it  transfers  to  the  customer.  At  contract  incepon,  once  the  contract  is  determined  to  be  within  the  scope  of  ASC  606,  the  Company
assesses the goods or services promised within each contract and determines those that are performance obligaons, and assesses whether each promised
good  or  service  is  disnct.  The  Company  then  recognizes  as  revenue  the  amount  of  the  transacon  price  that  is  allocated  to  the  respecve  performance
obligaon when, or as, the performance obligaon is sasfied. 

The Company does not include a financing component to its esmated transacon price at contract incepon unless it esmates that certain performance
obligaons  will  not  be  sasfied  within  one  year.  Addionally,  the  Company  recognizes  the  incremental  costs  of  obtaining  a  contract  as  an  expense  when
incurred if the amorzaon period of the asset that the Company otherwise would have recognized is one year or less.

Product Revenue, Net

The Company recognizes product revenues on sales of Auryxia primarily aributable to a limited number of customers, including wholesale distributors as
well as certain specialty pharmacy providers, in the U.S., which accounts for the largest poron of the Company's total revenue. These customers resell the
Company’s product to health care providers and paents. In addion to distribuon agreements with customers, the Company enters into arrangements with
health care providers and payors that provide for government-mandated and/or privately-negoated rebates, chargebacks and discounts with respect to the
purchase of the Company’s product. The Company’s payment terms are consistent with prevailing pracce in the respecve markets in which the Company
does business. Most of the Company’s customers make payments based on contract terms, which are not affected by conngent events that could impact the
transacon  price.  Payment  terms  fall  within  the  one-year  guidance  for  the  praccal  expedient,  which  allows  the  Company  to  forgo  adjustment  of  the
contractual payment amount of consideraon for the effects of a significant financing component.

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The Company recognizes revenue on product sales when the customer obtains control of the Company’s product, which occurs at a point in me, typically
upon receipt of the product by the Company's customer. The Company expenses incremental costs of obtaining a contract, such as sales commissions, as and
when incurred, if the expected amorzaon period of the asset that it would have recognized is one year or less. Sales commissions are recorded in selling,
general and administrave expense in the statements of operaons and comprehensive loss.

Revenue from product sales is recorded at the net sales price, or Transacon Price, which includes esmates of variable consideraon for which reserves are
established  and  which  result  from  discounts,  returns,  chargebacks,  rebates,  co-pay  assistance  and  other  allowances  offered  within  contracts  between  the
Company and its customers, health care providers, payors and other indirect customers relang to the Company’s sales of its products. When appropriate,
these esmates take into consideraon a range of possible outcomes which are probability-weighted in accordance with the expected value method in ASC
606  for  relevant  factors  such  as  the  Company’s  historical  experience,  current  contractual  and  statutory  requirements,  specific  known  market  events  and
trends, industry data and forecasted customer buying and payment paerns.

The amount of variable consideraon that is included in the Transacon Price may be constrained, and is included in the net sales price only to the extent that
it is probable that a significant reversal in the amount of the cumulave revenue recognized will not occur in a future period. Actual amounts of consideraon
ulmately received may differ from the Company’s esmates. The reserves are classified as reducons to accounts receivable, net of payable, if the trade
discount and/or allowance will be credited to the customer or accrued expenses and other current liabilies or other long-term liabilies, if payable to a
third-party in the consolidated balance sheets.

Trade Discounts and Allowances—The Company generally provides customers with prompt pay discounts and pay fees for distribuon services, such as
fees  for  certain  data  that  customer's  provide  to  the  Company.  Trade  discounts  and  allowances  are  recorded  as  a  reducon  of  revenue  within  the
consolidated statements of operaons and comprehensive loss in the period the related product revenue is recognized. The Company esmates that,
based on its experience, its customers will earn these discounts and fees, and the Company will deduct the full amount of these discounts and fees
from its gross product revenues and accounts receivable at the me such revenues are recognized.

Product Returns—Consistent with industry pracce, subject to certain caps for certain customers, the Company generally offers customers a limited
right of return which allows for the product to be returned when the product expiry is within an allowable window, when the quanty delivered is
different than quanty ordered, the product is damaged in transit prior to receipt by the customer or is subject to a recall. This right of return generally
lapses once the product is provided to a paent or generally, if the bole has been opened. The Company esmates the amount of its product sales
that  may  be  returned  and  records  this  esmate  as  a  reducon  of  revenue  in  the  period  the  related  product  revenue  is  recognized.  The  Company
currently  esmates  product  return  reserve  using  available  industry  data  and  its  own  historical  return  informaon,  including  its  visibility  into  the
esmated inventory remaining in the distribuon channel.

Provider Chargebacks and Discounts—Chargebacks for fees and discounts to providers represent the esmated obligaons resulng from contractual
commitments to sell products to qualified healthcare providers at prices lower than the list prices charged to customers who directly purchase the
product from the Company. Customers charge the Company for the difference between what they pay for the product and the ulmate selling price to
the qualified healthcare providers. These reserves are established in the same period that the related revenue is recognized, resulng in a reducon of
product revenue and accounts receivable. Chargeback amounts are generally determined at the me of resale to the qualified healthcare provider by
customers,  and  the  Company  generally  issues  credits  for  such  amounts  within  a  few  weeks  of  the  customer’s  resale  of  the  product.  Reserves  for
chargebacks consist of credits that the Company expects to issue for units that remain in the distribuon channel at each reporng period end that the
Company expects will be sold to qualified healthcare providers, and chargebacks that customers have claimed but for which the Company has not yet
issued a credit.

Commercial  and  Medicare  Part  D  Rebates—The  Company  contracts  with  various  commercial  payor  organizaons,  primarily  health  insurance
companies and pharmacy benefit managers, for the payment of rebates with respect to ulizaon of its products. The Company esmates the rebates
for commercial and Medicare Part D payors based upon (i) its contracts with the payors and (ii) informaon obtained from its customers and other
third pares regarding the payor mix for Auryxia. The Company esmates these rebates and records such esmates in the same period the related
revenue is recognized, resulng in a reducon of product revenue and the establishment of an accrued liability.

Other Government Rebates—The  Company  is  subject  to  discount  obligaons  under  state  Medicaid  programs  and  other  government  programs.  The
Company esmates its Medicaid and other government programs rebates based upon a range of possible outcomes that are probability-weighted for
the esmated payor mix. These reserves are recorded in the same period the related revenue is recognized, resulng in a reducon of product revenue
and the establishment

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of a current liability which is included in accrued expenses and other current liabilies in the consolidated balance sheets. For Medicare, the Company
also esmates the number of paents in the prescripon drug coverage gap for whom the Company will owe an addional liability under the Medicare
Part D program. The Company’s liability for these rebates consists of invoices received for claims from prior quarters that have not been paid or for
which an invoice has not yet been received, esmates of claims for the current quarter, and esmated future claims that will be made for product that
has been recognized as revenue, but which remains in the distribuon channel at the end of each reporng period.

Other Incenves—The Company offers a voluntary paent co-pay assistance program, which provides financial assistance to qualified commercially
insured paents with prescripon drug co-payments required by payors. The calculaon of the accrual for co-pay assistance is based on actual claims
processed during a given period plus an esmate of the amount the Company expects to pay based on historical ulizaon rates for the product that
has been recognized as revenue but is esmated to be remaining in in the distribuon channel at the end of each reporng period.

License, Collaboraon and Other Revenues

The Company enters into license and collaboraon agreements within the scope of ASC 606, under which it licenses certain rights to its product candidates to
third  pares.  The  terms  of  these  arrangements  typically  include  the  following:  (i)  non-refundable,  up  front  licenses  fees  associated  with  the  licensing  of
intellectual property; (ii) development, regulatory and commercial milestone payments; (iii) drug product the Company supplies in connecon with certain
license and collaboraon agreements and (iv) royales earned on net sales of licensed products.

In  determining  the  appropriate  amount  of  revenue  to  be  recognized  as  the  Company  fulfills  its  obligaons  under  each  of  its  agreements,  the  Company
implements the five-step model noted above. As part of the accounng for these arrangements, the Company develops assumpons that require judgment
to determine whether the individual promises should be accounted for as separate performance obligaons or as a combined performance obligaon, and to
determine the stand-alone selling price for each performance obligaon idenfied in the contract. A deliverable represents a separate performance obligaon
if both of the following criteria are met: (i) the customer can benefit from the good or service either on its own or together with other resources that are
readily available to the customer, and (ii) the enty’s promise to transfer the good or service to the customer is separately idenfiable from other promises in
the contract. The Company uses key assumpons to determine the stand-alone selling price, which may include forecasted revenues, development melines,
reimbursement rates for personnel costs, discount rates and probabilies of technical and regulatory success.

Licenses of Intellectual Property

If the license to the Company’s intellectual property is determined to be disnct from the other performance obligaons idenfied in the arrangement, the
Company recognizes revenue from non-refundable, up-front fees allocated to the license when the license is transferred to the customer and the customer is
able  to  use  and  benefit  from  the  license.  For  licenses  that  are  bundled  with  other  promises,  the  Company  ulizes  judgment  to  assess  the  nature  of  the
combined performance obligaon to determine whether the combined performance obligaon is sasfied over me or at a point in me and, if over me,
the appropriate method of measuring progress for purposes of recognizing revenue from non-refundable, up-front fees. The Company evaluates the measure
of progress each reporng period and, if necessary, adjust the measure of performance and related revenue recognion.

Milestone Payments

At  the  incepon  of  each  arrangement  that  includes  development  milestone  payments,  the  Company  evaluates  whether  the  milestones  are  considered
probable of being reached and esmates the amount to be included in the transacon price using the most likely amount method. The Company evaluates
factors such as the scienfic, clinical, regulatory, commercial and other risks that must be overcome to assess the milestone as probable of being achieved.
There  is  considerable  judgement  involved  in  determining  whether  a  milestone  is  probable  of  being  reached  at  each  specific  reporng  period.  Milestone
payments that are not within the control of the Company or the customer, such as regulatory approvals, are not considered probable of being achieved unl
those approvals are received. If it is probable that a significant revenue reversal would not occur, the associated milestone value is included in the transacon
price. The transacon price is then allocated to each performance obligaon on a relave stand-alone selling price basis, for which the Company recognizes
revenues  as,  or  when,  the  performance  obligaons  under  the  contract  are  sasfied.  At  the  end  of  each  subsequent  reporng  period,  the  Company  re-
evaluates  the  probability  of  achievement  of  such  development  milestones  and  any  related  constraint,  and  if  necessary,  adjusts  its  esmate  of  the  overall
transacon price. Any such adjustments are recorded on a cumulave catch-up basis, which would affect collaboraon revenue in the period of adjustment. 

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Drug Product Supply

Collaboraon  and  license  arrangements  that  include  a  promise  for  future  supply  of  drug  substance  or  drug  product  for  either  clinical  development  or
commercial supply at the licensee’s discreon are generally considered as opons. The Company assesses if these opons provide a material right to the
licensee and if so, they are accounted for as a separate performance obligaon. If the Company is entled to addional payments when the licensee exercises
these opons, any payments are recorded in license, collaboraon and other revenues when the licensee obtains control of the goods, which is generally
upon delivery.

Royales

The Company will recognize sales-based royales, including milestone payments based on the level of net sales, at the later of (i) when the related sales
occur, or (ii) when the performance obligaon to which some or all of the royalty has been allocated has been sasfied (or parally sasfied).

Collaborave Arrangements

The Company records the elements of its collaboraon agreements that represent joint operang acvies in accordance with ASC Topic 808, Collaborave
Arrangements, or ASC 808. Accordingly, the elements of the collaboraon agreements that represent acvies in which both pares are acve parcipants
and to which both pares are exposed to the significant risks and rewards that are dependent on the commercial success of the acvies are recorded as
collaborave arrangements. The Company considers the guidance in ASC 606-10-15, Revenue from Contracts with Customers – Scope and Scope Excepons, in
determining the appropriate treatment for the transacons between the Company and its collaborave partners and the transacons between the Company
and third pares. Generally, the classificaon of transacons under the collaborave arrangements is determined based on the nature and contractual terms
of  the  arrangement  along  with  the  nature  of  the  operaons  of  the  parcipants.  To  the  extent  product  revenue  is  generated  from  the  collaboraon,  the
Company recognizes its share of the net sales on a gross basis if the Company is deemed to be the principal in the transacons with customers, or on a net
basis if the Company is instead deemed to be the agent in the transacons with customers, consistent with the guidance in ASC 606.

Cost of Goods Sold

Cost of goods sold, or COGS, includes costs closely correlated or directly related to the costs to manufacture commercial drug product for Auryxia, including
costs paid to the Company's contract manufacturing organizaons, or CMOs, as well as indirect costs. Direct and indirect costs include fees for packaging,
shipping,  insurance  and  quality  assurance,  idle  capacity  charges,  roune  tesng  costs,  roune  ongoing  efforts  to  improve  exisng  commercial  products,
reserves for excess inventory, write-offs for inventory that fails to meet specificaons or is otherwise no longer suitable for commercial sale, including scrap,
changes  in  firm  purchase  commitment  liability  and  royales  due  to  the  licensor  of  Auryxia  related  to  U.S.  and  Japan  product  sales  recognized  during  the
period. In addion, COGS includes the amorzaon of development product rights for the Auryxia intangible asset. The Company also includes personnel-
related  costs,  including  salaries  and  bonuses,  employee  benefits  and  stock-based  compensaon  aributable  to  employees  in  parcular  funcons  and
associated directly with the manufacturing of our commercial products.

Further, the Company includes in COGS costs to manufacture drug product provided to customers for which we have a license agreement. Cost of goods sold
for a newly launched product may not include the full cost of manufacturing unl the inial pre-launch inventory is depleted, and addional inventory is
manufactured and sold.

Unl the Company receives regulatory approval for vadadustat, the Company records expenses incurred for the manufacture of pre-launch inventory that
could potenally support a U.S. launch as R&D expense. The costs associated with the pre-launch inventory for the Medice Territory was expensed to R&D
through April 2023 when markeng authorizaon was received. The costs incurred to manufacturer vadadustat for the Medice Territory aer the markeng
approval in the Medice Territory is capitalized in inventory.

Therefore, the pre-launch inventory costs are not included in COGS.

Research and Development Expenses

R&D  costs  are  expensed  as  incurred.  Internal  R&D  expenses  are  comprised  of  costs  incurred  in  providing  R&D  acvies,  including  salaries  and  bonuses,
employee benefits, stock-based compensaon for personnel engaged in R&D acvies. In addion, they include facility costs, including the laboratory and an
allocaon of office space for ulizaon by R&D staff, depreciaon expense on the laboratory equipment as well as other direct costs such as lab supplies and
equipment.

External  R&D  costs  include  development  of  potenal  new  manufacturing  processes  and  methods  for  both  commercial  and  non-commercial  products,
conceptual  formulaon  and  design  of  possible  product  and  process  alternaves,  research  compounds  and  clinical  manufacturing  costs,  costs  incurred  for
consultants and other outside services, such as data

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management  and  stascal  analysis  support  and  materials  and  supplies  used  in  support  of  the  clinical  and  preclinical  programs  and  costs  paid  to  clinical
resource organizaons, or CRO, including invesgave sites that conduct the Company's clinical trials.

Non-refundable  advance  payments  for  goods  and  services  for  both  Auryxia  and  vadadustat  are  recorded  in  prepaid  and  other  current  assets  in  the
consolidated balance sheets and expensed when the acvity is performed or when the goods are received. In addion, the costs associated with pre-launch
inventory, including the cost of raw materials, costs paid to contract manufacturers for inventory manufacturing, freight and custom charges for vadadustat
are expensed as R&D prior to regulatory approval. For the years ended December 31, 2023 and 2022, material and producon related costs of pre-approval
inventory recorded to R&D was $6.4 million and $7.6 million, respecvely.

Selling, General and Administrave Expenses

Selling,  general  and  administrave,  or  SG&A,  expenses  consist  primarily  of  compensaon  for  personnel,  including  stock-based  compensaon  related  to
commercial,  markeng,  execuve,  finance  and  accounng,  informaon  technology,  corporate  and  business  development  and  human  resource  funcons.
Other  SG&A  expenses  include  costs  for  markeng  iniaves  for  the  Company's  commercial  products,  market  research  and  analysis  on  the  Company's
commercial and product and potenal product candidates, conferences and trade shows, travel expenses, professional services fees (including legal, patent,
accounng,  audit,  tax,  and  consulng  fees),  insurance  costs,  general  corporate  expenses  and  allocated  facilies-related  expenses,  including  rent  and
maintenance  of  facilies.  Costs  associated  with  adversing  are  expensed  in  the  period  incurred  and  are  included  in  selling,  general  and  administrave
expenses.  For  the  years  ended  December  31,  2023  and  2022,  adversing  expenses  totaled  $1.0  million  and  $6.7  million,  respecvely,  all  related  to  the
Company's U.S. sales of its commercial product Auryxia.

Patent Costs

All patent-related costs incurred in connecon with the filing and prosecung patent applicaons are expensed as incurred due to the uncertainty about the
recovery  of  the  expenditure.  Such  amounts  incurred  are  classified  as  SG&A  expenses  in  the  accompanying  consolidated  statements  of  operaons  and
comprehensive loss.

Stock-Based Compensaon

The Company’s stock-based compensaon program allows for grants of common stock opons, restricted stock awards, performance-based restricted stock
units, or PSUs, stock appreciaon rights, or SARs and restricted stock units. Grants are awarded to employees and non-employees, including directors.

The Company accounts for its stock-based compensaon awards in accordance with ASC Topic 718, Compensaon—Stock Compensaon, or ASC 718. ASC 718
requires all stock-based payments to employees and non-employees, including modificaons to exisng stock awards, to be recognized in the statements of
operaons and comprehensive loss based on their fair values. The Company esmates the fair value of opons granted using the Black-Scholes opon pricing
model, or Black-Scholes. The Company uses the market price at the me of grant to determine the fair value of restricted stock awards and performance-
based restricted stock awards.

The  Black-Scholes  opon  pricing  model  requires  the  input  of  certain  subjecve  assumpons,  including  (a)  the  expected  stock  price  volality,  (b)  the
calculaon  of  expected  term  of  the  award,  (c)  the  risk-free  interest  rate  and  (d)  expected  dividends.  Prior  to  2017,  due  to  the  lack  of  company-specific
historical and implied volality data for trading the Company’s stock in the public market, the Company had based its esmate of expected volality on the
historical volality of a group of similar companies that are publicly traded. The historical volality was calculated based on a period of me commensurate
with  the  expected  term  assumpon.  The  Company  uses  the  simplified  method  as  prescribed  by  the  Securies  and  Exchange  Commission,  or  SEC,  Staff
Accounng Bullen No. 107, Share-Based Payment, to calculate the expected term for opons granted to employees as it does not have sufficient historical
exercise data to provide a reasonable basis upon which to esmate the expected term. The expected term is applied to the stock opon grant group as a
whole,  as  the  Company  does  not  expect  substanally  different  exercise  or  post-vesng  terminaon  behavior  among  its  employee  populaon.  For  opons
granted  to  non-employees,  the  Company  ulizes  the  contractual  term  of  the  arrangement  as  the  basis  for  the  expected  term  assumpon.  The  risk-free
interest rate is based on U.S. Treasury securies with a maturity date commensurate with the expected term of the associated award. The expected dividend
yield is assumed to be zero as the Company has never paid dividends and has no current plans to pay any dividends on its common stock. The Company
recognizes forfeitures as they occur.

The  Company’s  stock-based  awards  are  subject  to  either  service  or  performance-based  vesng  condions.  Compensaon  expense  related  to  awards  to
employees  and  non-employees  with  service-based  vesng  condions  is  recognized  on  a  straight-line  basis  based  on  the  grant  date  fair  value  over  the
associated service period of the award, which is generally the vesng term, and is adjusted for pre-vesng forfeitures in the period in which the forfeitures
occur. Compensaon expense related to awards to employees and non-employees with performance-based vesng condions is recognized based on the
grant date

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fair value over the requisite service period using the accelerated aribuon method to the extent achievement of the performance condion is probable.

For awards with performance condions in which the award does not vest unless the performance condion is met, the Company recognizes expense if, and
to the extent that, the Company esmates that achievement of the performance condion is probable. If the Company concludes that vesng is probable, it
recognizes expense from the date it reaches this conclusion through the esmated vesng date.

Income Taxes

Income  taxes  are  recorded  in  accordance  with  FASB  Topic  740,  Income Taxes,  or  ASC  740,  which  provides  for  deferred  taxes  using  an  asset  and  liability
approach.  The  Company  recognizes  deferred  tax  assets  and  liabilies  for  the  expected  future  tax  consequences  of  events  that  have  been  included  in  the
financial statements or tax returns. Deferred tax assets and liabilies are determined based on the difference between the financial statement and tax bases
of assets and liabilies using enacted tax rates in effect for the year in which the differences are expected to reverse. Valuaon allowances are provided, if,
based upon the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. All deferred taxes as of
December 31, 2023 and 2022 are classified as non-current within the income tax provision. See Note 15, Income Taxes, for further informaon.

The Company accounts for uncertain tax posions in accordance with the provisions of ASC 740. When uncertain tax posions exist, the Company recognizes
the tax benefit of tax posions to the extent that the benefit will more likely than not be realized. The determinaon as to whether the tax benefit will more
likely  than  not  be  realized  is  based  upon  the  technical  merits  of  the  tax  posion,  as  well  as  consideraon  of  the  available  facts  and  circumstances.  As  of
December 31, 2023 and 2022, the Company does not have any significant uncertain tax posions. The Company recognizes interest and penales related to
uncertain tax posions in income tax expense.

Net Loss per Share

Basic net loss per share is calculated by dividing net loss by the weighted-average shares outstanding during the period, without consideraon for common
stock  equivalents.  Diluted  net  loss  per  share  is  calculated  by  adjusng  weighted-average  shares  outstanding  for  the  diluve  effect  of  common  stock
equivalents outstanding for the period, determined using the treasury-stock method. For purposes of the diluted net loss per share calculaon common stock
opons,  stock  appreciaon  rights,  warrants  and  RSUs  as  well  as  restricted  stock,  if  the  Company  was  to  issue  any,  are  considered  to  be  common  stock
equivalents,  but  have  been  excluded  from  the  calculaon  of  diluted  net  loss  per  share,  as  their  effect  would  be  an-diluve  for  all  periods  presented.
Therefore, basic and diluted net loss per share were the same for all periods presented. Diluted net income per share is calculated by dividing the net income
by the weighted-average common shares outstanding for the period, including any diluve effect from outstanding opons, warrants, restricted stock and
RSUs using the treasury stock method.

Segment Informaon

Operang segments are defined as components of an enterprise about which separate discrete informaon is available for evaluaon by the chief operang
decision maker, or CODM, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company operates its business
in a single segment and as one reporng unit, which is how its chief operang decision maker (who is the Company's president and chief execuve officer)
reviews financial performance and allocates resources. The Company views its operaons as and manages its business in one operang segment.

Recent Accounng Pronouncements Not Yet Adopted

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. ASU 2023-09 requires public companies
to  annually  (i)  disclose  specific  categories  in  the  rate  reconciliaon  and  (ii)  provide  addional  informaon  for  reconciling  items  that  meet  a  quantave
threshold (if the effect of those reconciling items is equal to or greater than 5 percent of the amount computed by mulplying pretax income or loss by the
applicable statutory income tax rate). ASU 2023-09 will be effecve for the annual reporng periods in fiscal years beginning aer December 15, 2024. The
Company is currently evaluang ASU 2023-09 and does not expect it to have a material effect on the Company’s consolidated financial statements.

In November 2023, the FASB issued ASU 2023-07, Improvements to Reportable Segment Disclosures. ASU 2023-07 requires disclosure of significant segment
expenses that are regularly provided to the CODM and included within the segment measure of profit or loss, an amount and descripon of its composion
for other segment items to reconcile to segment profit or loss, and the tle and posion of the enty’s CODM. ASU 2023-07 will be applied retrospecvely
and is effecve for annual reporng periods in fiscal years beginning aer December 15, 2023, and interim reporng periods in fiscal years beginning aer
December 31, 2024. The Company is currently reviewing the impact that the adopon of ASU 2023-07 may have on its consolidated financial statements and
disclosure.

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3.

FAIR VALUE MEASUREMENTS

The tables below present certain assets and liabilies measured at fair value categorized by the level of input used in the valuaon of each asset and liability
(in thousands):

Cash equivalents:

Money market funds

Cash equivalents:

Money market funds

Long-term liability:

Embedded debt derivave

Level 1

Level 2

Level 3

Total

December 31, 2023

1,504 

—

— $

1,504 

Level 1

Level 2

Level 3

Total

December 31, 2022

52,442 

—

—

— $

— $

52,442 

760  $

760 

$

$

Cash and cash equivalents —Money market funds included within cash and cash equivalents are classified within Level 1 of the fair value hierarchy because
they are valued using quoted market prices in acve markets.

Embedded debt derivave —As described in Note 7, Indebtedness, the Company’s prior Loan Agreement with Pharmakon contained certain provisions that
change the underlying cash flows of the debt instrument, including the acceleraon of the obligaons under the Pharmakon Loan Agreement under certain
events  of  default,  and  under  certain  circumstances,  the  applicaon  of  a  default  interest  rate  on  all  outstanding  obligaons  during  the  occurrence  and
connuance of an event of default. The Company concluded that these features of the Pharmakon Loan Agreement represent a single compound embedded
debt  derivave  required  to  be  bifurcated  from  the  debt  host  instrument  and  re-measured  at  fair  value  on  a  quarterly  basis.  The  Company  classified  the
embedded debt derivave as a non-current liability in its consolidated balance sheets.

The esmated fair value of the derivave liability on both December 31, 2023 and 2022 was determined using a scenario-based approach and discounted
cash flow model that includes principal and interest payments under various cash flow assumpons. Should the Company’s assessment of the probabilies
around these scenarios change, including for changes in market condions, there could be a change to the fair value of the embedded debt derivave. The
determinaon of the fair value of the embedded debt derivave includes inputs not observable in the market and as such, represents Level 3 measurement.
The  methodology  ulized  requires  inputs  based  on  certain  subjecve  assumpons,  specifically,  probabilies  of  acceleraon  of  the  obligaons  under  the
Pharmakon Loan Agreement by Pharmakon under certain events of default.

The following table reconciles the fair value of the embedded debt derivave (in thousands):

Balance at December 31, 2022
Change in fair value, recorded as other income
Balance at December 31, 2023

4.

INVENTORIES AND PREPAID MANUFACTURING

$

$

760 
(760)
— 

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Inventories  consists  of 

the 

following 

(in 

thousands): 

Inventories, current:
Work-in-process
Finished goods
Inventories, current
Long-term inventories included in other long-term assets:

Raw materials
Work-in-process

Inventories, long-term
Total inventories

December 31,

2023

2022

$

$

$
$

4,297  $

11,394 
15,691  $

1,143 
8,260 
9,403  $
25,094  $

7,892 
13,676 
21,568 

610 
— 
610 
22,178 

For the period ended December 31, 2023 and 2022, inventories consisted primarily of inventories related to the Company's commercial product, Auryxia. As
of December 31, 2023, the Company had $0.5 million of prepaid manufacturing costs for Auryxia drug substance and manufacturing costs. The Company did
not have any prepaid manufacturing related to Auryxia as of December 31, 2022.

Inventory  wrien  down  for  Auryxia  as  a  result  of  excess,  obsolescence,  scrap  or  other  reasons  charged  to  cost  of  product  and  other  revenue  in  the
consolidated statements of operaons and comprehensive loss totaled approximately $1.6 million and $30.2 million during the years ended December 31,
2023 and 2022, respecvely. For the year ended December 31, 2023, the Company recorded $4.3 million of lowered cost of product and other revenue due to
the Company's ability to commercially sell inventory previously wrien down to zero, its then net realizable value. As of December 31, 2023, the Company has
an addional $12.3 million of inventory previously wrien down inventory to its then net realizable value of zero for drug product that may be salable in
future periods.

Pre-Launch Inventory

The Company records advance payments for vadadustat acve pharmaceucal ingredient, or API, or drug substance (raw materials) it expects to use for the
potenal U.S. launch and Medice Territory as prepaid manufacturing costs. Upon the quality release of the vadadustat batches and transfer of tle to the
Company from the CMO, the cost of the pre-launch inventory, including the manufacturing costs is expensed to R&D. As of December 31, 2023, the Company
had $14.0 million of prepaid manufacturing costs for vadadustat drug substance expected to be used in the potenal U.S. launch of vadadustat included in
prepaid expenses and other current assets on the consolidated balance sheet. See Note 6, Addional Balance Sheet Detail, for further informaon.

5.

INTANGIBLE ASSET AND GOODWILL

Intangible Asset

Intangible  asset,  net  of  accumulated  amorzaon,  prior  impairments  and  adjustments  as  of  December  31,  2023  and  2022  consisted  of  the  following  (in
thousands):

Intangible asset:

December 31, 2023

December 31, 2022

Gross
Carrying
Value

Accumulated
Amorzaon

Net Book Value

Net Book Value

Developed product rights for Auryxia

$

214,705  $

(178,663) $

36,042  $

72,084 

Esmated Useful
Life
6 years

The Company recorded $36.0 million in amorzaon expense during each of the years ended December 31, 2023 and 2022 related to the developed product
rights for Auryxia.

Goodwill

As of December 31, 2023 and 2022, the Company had goodwill of $59.0 million recorded in connecon with the December 2018 merger with Keryx. The
Company has not idenfied any goodwill impairment to date.

6. ADDITIONAL BALANCE SHEET DETAIL

Prepaid expenses and other current assets are as follows (in thousands):

Akebia Therapeucs, Inc. | Form 10-K | Page 144

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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Descripon

Prepaid manufacturing
Other

Total prepaid expenses and other current assets

See Note 4, Inventories, for further informaon on prepaid manufacturing expenses.

Accrued expenses and other current liabilies are as follows (in thousands):

Descripon
Product revenue allowances
Product return reserves, current poron
Compensaon and related benefits
Accrued manufacturing costs
BioVectra terminaon fees, current poron
Operang lease liabilies, current poron
Royales due to Panion
Liability related to sale of future royales, current poron
Professional fees
Clinical trial costs
Restructuring costs, current poron
Other

Total accrued expenses and other current liabilies

Other long-term assets are as follows (in thousands):

Descripon
Long-term inventories
Restricted cash
Other

Total other long-term assets

December 31,

2023

2022

14,489  $
5,754 
20,243  $

15,615 
17,249 
32,864 

December 31,

2023

2022

22,940  $
5,420 
8,216 
5,555 
7,500 
4,491 
3,989 
2,048 
1,909 
328 
737 
4,602 
67,735  $

December 31,

2023

2022

9,403  $
1,654 
1,366 
12,423  $

26,268 
7,789 
11,894 
4,310 
— 
4,744 
3,804 
— 
1,886 
5,755 
2,751 
6,576 
75,777 

610 
2,703 
2,059 
5,372 

$

$

$

$

$

$

See Note 4, Inventories, for further informaon on long-term inventories.

7.

INDEBTEDNESS

Entry into BlackRock Loan Facility

On January 29, 2024, the Closing Date, the Company entered into the Agreement for the Provision of a Loan Facility, or the BlackRock Credit Agreement, with
Kreos Capital VII (UK) Limited, or Kreos, which are funds and accounts managed by BlackRock Inc., collecvely, BlackRock, and provides for a senior secured
term loan facility in the aggregate principal amount of up to $55.0 million, or the Term Loan Facility. The Term Loan Facility is available in three tranches (i)
Tranche A — $37.0 million was funded on the Closing Date and used to repay the Pharmakon Term Loans; (ii) Tranche B — $8.0 million is available in a single
draw through December 31, 2024, and (ii) Tranche C — $10.0 million is available in a single draw through December 31, 2024, collecve the Term Loans.
Tranche B and C are available subject to certain condions, including the Company's receipt of markeng approval for vadadustat from the FDA and in the
case of Tranche C, receipt of a certain amount of cumulave gross cash proceeds aer the Closing Date in the form of equity or equity linked securies in one
or more series of transacons.

The  BlackRock  Term  Loan  Facility  has  an  inial  maturity  date  of  March  31,  2025,  which  will  be  automacally  extended  to  January  29,  2028,  if  Company
receives FDA approval for vadadustat on or prior to June 30, 2024, or the BlackRock Maturity Date. The Company is required to make interest-only payments
unl  December  31,  2026,  aer  which  the  Company  will  begin  paying  equal  monthly  principal  on  the  first  calendar  day  of  each  month,  or  the  BlackRock
Interest Only Period. In the event of certain prespecified events, the repayment schedule will be accelerated. For example, if FDA approval of vadadustat is
not

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obtained on or prior to June 30, 2024, the BlackRock Interest Only Period will automacally terminate on October 1, 2024, and the Company will be required
to  repay  the  Term  Loans  in  seven  equal  monthly  payments  (comprised  of  principal  and  interest),  commencing  on  October  1,  2024  and  ending  on  the
BlackRock Maturity Date.

The Term Loan Facility will accrue interest at a floang annual rate equal to the sum of (i) term Secured Overnight Financing Rate, or SOFR, for a tenor of one
month (subject to a floor of 4.25% per annum) plus (ii) a margin of 6.75% per annum (subject to an overall cap of 15.00% per annum on the all-in interest
rate).  During  the  connuance  of  any  payment  event  of  default  under  the  BlackRock  Credit  Agreement,  the  interest  rate  on  such  overdue  sum  will
automacally increase by an addional 3.0% per annum, and may be subject to an addional late fee of 2.0% of such overdue sum. The Term Loan Facility
also  includes  transacon  fees  ranging  from  1.00%  to  1.25%  of  the  draw  down  amount  as  well  exit  fees  of  0.75%  of  the  amount  funded  to  the  relevant
tranche.

If the Company prepays the outstanding loan prior to maturity, it will be required to pay a prepayment fee ranging from 1.0% to 4.0% of the amount prepaid.
If prepayment is made during the first year, the Company also is required to pay the amount of otherwise due interest payments for the twelve-month period
following prepayment.

The BlackRock Term Loan Facility is secured by substanally all of the exisng and aer-acquired assets of the Company, including intellectual property. The
BlackRock Credit Agreement requires the Company to (i) maintain a minimum aggregate cash balance of $15.0 million in one or more controlled accounts or
(ii) trailing twelve-month revenue of $150.0 million, both of which are measured monthly. The BlackRock Credit Agreement contains various affirmave and
negave covenants that limit the Company's ability to enter into certain transacons.

On the Closing Date, Kreos Capital VII Aggregator SCSp, an affiliate of Kreos, or the Warrant Holder, received a warrant to purchase 3,076,923 shares of the
Company’s common stock, at an exercise price per share of $1.30, and upon borrowing of Tranche C, the Company will become obligated to issue addional
warrants to purchase 1,153,846 shares of the Company’s common stock at an exercise price per share of $1.30 . Each warrant shall be exercisable for eight
years from the date of issuance.

The  Company's  net  proceeds  from  the  Tranche  A  Loan  were  approximately  $34.5  million,  aer  deducng  debt  issuance  costs,  fees  and  expenses.  The
amounts classified on the consolidated balance sheet as of December 31, 2023, are reflecve of the current and long-term porons due under the repayment
schedule due to Blackrock.

Other Agreements Accounted for as Debt

The  Company  has  a  liability  related  to  the  sale  of  future  liabilies  which  is  accounted  for  as  a  debt  arrangement.  See  Note  8,  Deferred  Revenue,  Refund
Liability and Liability Related to Sale of Future Royales, for further informaon.

The Company has a refund liability with Vifor (Internaonal) Ltd. (now a part of CSL Limited), or CSL Vifor, which is also accounted for as a debt arrangement.
See Note 8, Deferred Revenue, Refund Liability and Liability Related to Sale of Future Royales, for further informaon.

Pharmakon Term Loan (Exnguished January 29, 2024)

On November 11, 2019, the Company, with Keryx as guarantor, entered into a loan agreement, or the Pharmakon Loan Agreement, with BioPharma Credit
PLC  as  collateral  agent  and  a  lender,  or  the  Collateral Agent,  and  BioPharma  Credit  Investments  V  (Master)  LP  as  a  lender,  and  a  Guaranty  and  Security
Agreement with the Collateral Agent. BioPharma Credit PLC subsequently transferred its interest in the loans, solely in its capacity as a lender, to its affiliate,
BPCR  Limited  Partnership.  The  Collateral  Agent  and  the  lenders  are  collecvely  referred  to  as  Pharmakon. The Pharmakon Loan Agreement, as amended,
consisted of a secured term loan facility in an aggregate amount of up to $100.0 million, or Pharmakon Term Loans, which was made available under two
tranches: (i) Tranche A — $80.0 million and (ii) Tranche B —the second tranche of $20.0 million. On November 25, 2019, the Company drew $77.3 million on
Tranche A, net of fees and expenses of $2.7 million. On December 10, 2020, the Company drew $20.0 million on Tranche B, net of immaterial lender expenses
and issuance costs.

On July 15, 2022, or Second Amendment Effecve Date, the Company prepaid $25.0 million of the then outstanding principal, $5.0 million on Tranche A and
$20.0 million on Tranche B as well as a $0.5 million prepayment fee under the terms of the Pharmakon Loan Agreement. During the year ended December 31,
2022, the Company recorded a debt exnguishment loss of $0.9 million. As of December 31, 2023, the Company had $35.0 million of principal outstanding.

The Pharmakon Term Loans, as amended, bore interest through maturity at a variable rate based on the three month SOFR plus a SOFR adjustment of 0.30%
plus 7.50%. The SOFR interest rate was capped at 3.35% through October 31, 2023, the date of the Fourth Amendment to the Pharmakon Loan Agreement, or
Fourth Amendment. As of December 31, 2023, the three-month SOFR rate was no longer subject to the SOFR cap, therefore, the Company's interest rate was
13.13%. The Company recognized approximately $6.0 million and $9.5 million of interest expense related to the Pharmakon Loan Agreement during

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the years ended December 31, 2023 and 2022, respecvely. Unamorzed discount and issuance costs were $0.3 million as of December 31, 2023.

The  Company  was  required  to  make  equal  quarterly  principal  payments  that  started  on  the  33rd-month  anniversary  of  the  applicable  Funding  Date  unl
November 25, 2024, or Original Maturity Date. The Fourth Amendment, which the Company entered into on October 31, 2023, extended the maturity date to
March  31,  2025,  or  New  Maturity  Date,  and  revised  the  principal  payments  to  monthly  principal  payments  starng  in  October  2024  on  the  remaining
principal balance of $35.0 million. During the year ended December 31, 2023, the Company made quarterly principal payments totaling $32.0 million under
the Pharmakon Term Loans.

The Pharmakon Loan Agreement was secured by a first priority lien on certain assets of the Company, including Auryxia and certain related assets, cash and
certain equity interests held by the Company. The Pharmakon Loan Agreement contained various affirmave and negave covenants, including that limit the
Company's ability to engage in specified types of transacons and require the Company to maintain one or more controlled cash accounts. In addion, the
Pharmakon Loan Agreement, as amended, required the Company to (i) report quarterly minimum net Auryxia sales for the trailing twelve-month period of
$85.0 million, (ii) in certain instances maintain an annual minimum liquidity threshold and (iii) not be subject to any qualificaon as to going concern in its
Annual Reports on Form 10-K. If an event of default occurred, including a qualificaon as a going concern, and was connuing under the Pharmakon Loan
Agreement, the Collateral Agent would have been entled to take enforcement acon, including acceleraon of amounts due under the Pharmakon Loan
Agreement. Under certain circumstances, a default interest rate would have applied on all outstanding obligaons during the occurrence and connuance of
an event of default. As of December 31, 2023 and 2022, the Company was in compliance with the covenants under the Pharmakon Loan Agreement.

Future principal payments pursuant to the contractual terms of the Pharmakon Loan Agreement, as amended, as of December 31, 2023 were as follows (in
thousands):

Years ended December 31,
2024
2025
Total before unamorzed discount and issuance costs
Less: unamorzed discount and issuance costs

Total term loans

$

$

Amounts

17,500 
17,500 
35,000 
(317)
34,683 

As it relates to the Pharmakon Loan Agreement, the Company concluded the conngent put and call features that could require mandatory repayment upon
the  occurrence  of  an  event  of  default,  default  interest  rates  to  be  payable  and  certain  other  events  represent  an  embedded  derivave  required  to  be
bifurcated from the debt host instrument and accounted for separately and re-measured at fair value on a quarterly basis. The fair value of the derivave
liability related to the Company’s Pharmakon Loan Agreement was $0 and $0.8 million as of December 31, 2023 and 2022, respecvely. During the years
ended  December  31,  2023  and  2022,  the  Company  recognized  a  $0.8  million  and  $1.1  million  gain,  respecvely,  in  other  income  in  the  consolidated
statements of operaons and comprehensive loss related to the decrease in the fair value of the embedded debt derivave.

On January 29, 2024, using the proceeds from the BlackRock Credit Agreement, the Company paid the then current outstanding principal balance under the
Pharmakon Term Loan of $35.0 million, plus the outstanding interest and a prepayment fee of $0.2 million.

8. DEFERRED REVENUE, REFUND LIABILITY AND LIABILITY RELATED TO SALE OF FUTURE ROYALTIES

CSL Vifor License Agreement

Summary of Agreement

On  February  18,  2022,  the  Company  entered  into  a  Second  Amended  and  Restated  License  Agreement,  or  the  Vifor  Agreement,  with  CSL  Vifor  which
amended  and  restated  the  License  Agreement  dated  as  of  May  12,  2017,  or  the  Original  License  Agreement.  The  Vifor  Agreement  grants  CSL  Vifor  an
exclusive license to sell vadadustat to Fresenius Kidney Care Group LLC, an affiliate of Fresenius Medical Care North America, or FMCNA, and its affiliates,
including Fresenius Kidney Care Group LLC, to certain third-party dialysis organizaons approved by the Company, to independent dialysis organizaons that
are  members  of  certain  group  purchasing  organizaons  and  certain  non-retail  specialty  pharmacies,  collecvely,  the  Supply  Group,  in  the  U.S.,  or  Vifor
Territory.  The  Company  plans  to  market  vadadustat  in  the  U.S.,  if  approved,  including  to  the  Supply  Group,  and  sell  vadadustat  directly  to  organizaons
outside  the  Supply  Group.  CSL  Vifor  has  agreed  that  it  would  not  sell  or  otherwise  supply  vadadustat  unl  the  FDA  has  granted  regulatory  approval  for
vadadustat for the treatment of anemia due to

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CKD in adult paents with DD-CKD in the Vifor Territory and unl CSL Vifor has entered a supply agreement with the applicable member of the Supply Group.

The Vifor Agreement is structured as a profit share arrangement between the Company and CSL Vifor in which the Company will receive approximately 66%
of  the  profit,  net  of  certain  pre-specified  costs.  In  addion,  CSL  Vifor  made  an  upfront  payment  to  the  Company  of  $25.0  million  in  February  2022  in
connecon  with  the  amendment  and  restatement  of  the  Vifor  Agreement,  which  was  recorded  as  long-term  deferred  revenue  in  the  accompanying
consolidated balance sheet.

Unless  earlier  terminated,  the  Vifor  Agreement  will  expire  upon  the  later  of  the  expiraon  of  all  patents  that  claim  or  cover  vadadustat  or  expiraon  of
markeng or regulatory exclusivity for vadadustat in the Vifor Territory. CSL Vifor may terminate the Vifor Agreement in its enrety upon thirty months' prior
wrien noce aer the first anniversary of the receipt of regulatory approval, if approved from the FDA for vadadustat for dialysis-dependent CKD paents.
The Company may terminate the Vifor Agreement in its enrety for convenience, following the earlier of a certain period of me elapsing or following certain
specified regulatory events, and upon six months’ prior wrien noce. If the Company so terminates for convenience, subject to specified excepons, the
Company will pay a terminaon fee to CSL Vifor. In addion, either party may, subject to a cure period, terminate the Vifor Agreement in the event of the
other party’s uncured material breach or bankruptcy.

Investment Agreements

In connecon with the Original License Agreement, in May 2017, the Company sold an aggregate of 3,571,429 shares of the Company’s common stock, or
2017 Shares, to CSL Vifor at a price per share of $14.00 for a total of $50.0 million.

In February 2022, in connecon with the Vifor Agreement, the Company sold an aggregate of 4,000,000 shares of its common stock, or 2022 Shares, to CSL
Vifor for a price per share of $5.00 for a total of $20.0 million.

The $18.3 million represenng the premium over the closing stock price, or $4.7 million for the 2017 Shares and $13.6 million for the 2022 Shares, represent
consideraon related to the Vifor Agreement. 

CSL Vifor agreed to a lock-up restricon to not sell or otherwise dispose of the 2017 Shares or the 2022 Shares for a period of me, which restricons have
expired with respect to both the 2017 Shares and the 2022 Shares. The 2017 Shares and 2022 Shares are subject to standsll agreement and are subject to
vong agreements. The 2017 Shares and 2022 Shares have not been registered pursuant to the Securies Act of 1933, as amended, or the Securies Act, and
were issued and sold in reliance upon the exempon from registraon contained in Secon 4(a)(2) of the Securies Act and Rule 506 promulgated thereunder
as the transacon did not involve any public offering within the meaning of Secon 4(a)(2) of the Securies Act.

Deferred Revenue Recognion

The Company evaluated the elements of the Vifor Agreement in accordance with the provisions of ASC 606 and concluded that the contract counterparty, CSL
Vifor,  is  a  customer.  The  Company  idenfied  one  performance  obligaon  under  the  Vifor  Agreement  at  incepon,  which  is  the  non-sublicensable,  non-
transferrable license under certain of the Company’s intellectual property to (i) sell vadadustat solely to the Supply Group, (ii) sell vadadustat to Designated
Wholesalers solely for resale to members of the Supply Group, (iii) conduct medical affairs with respect to vadadustat in the Vifor Territory in the field during
the term of the Vifor Agreement and (iv) use the Akebia Trademark solely in connecon with the sale of vadadustat.

The transacon price of $43.3 million was comprised of the up-front payment of $25.0 million and the premiums paid by CSL Vifor on the First Investment
Agreement and Second Investment Agreement of $4.7 million and $13.6 million, respecvely. Pursuant to the Vifor Agreement, these payments are non-
refundable and non-creditable against any other amount due to the Company. However, if the Centers for Medicare & Medicaid Services, or CMS, determines
that vadadustat is excluded from the Transional Drug Add-on Payment Adjustment, or TDAPA, the Company can terminate the Vifor Agreement and will be
required to repay the up-front payment and the premiums paid by CSL Vifor on the First Investment Agreement and the Second Investment Agreement. Given
the  uncertainty  associated  with  a  potenal  future  approval  of  vadadustat  by  the  FDA,  and  whether,  if  approved,  vadadustat  would  be  included  in  certain
reimbursement bundles by CMS, the Company constrained the enre transacon price at incepon. Unl the license is delivered, the transacon price of
$43.3 million will remain in long-term deferred revenue in the accompanying consolidated balance sheets. (see Note 12, License, collaboraon and other
revenue for further informaon)

Refund Liability to Customer/Working Capital Fund

Pursuant to the Vifor Agreement, CSL Vifor contributed $40.0 million to a working capital fund, or Working Capital Fund, established to fund approximately
50% of the Company’s costs of purchasing vadadustat from its contract manufacturers for the supply of vadadustat for the Vifor Territory already delivered or
to be delivered to the Company through the end of 2023. The amount of the Working Capital Fund will be reviewed at specified intervals and is adjusted
based on a number of factors including outstanding supply commitments for vadadustat for the Vifor Territory and agreed upon vadadustat inventory levels
held by the Company for the Vifor Territory. Upon terminaon or expiraon of the Vifor Agreement for any reason other than

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convenience  by  CSL  Vifor  (including  following  receipt  of  the  CRL  for  vadadustat),  the  Company  will  be  required  to  refund  the  outstanding  balance  of  the
Working Capital Fund on the date of terminaon or expiraon.

The Company has determined that the working capital fund does not represent an obligaon to transfer goods or services to CSL Vifor in the future and thus
under ASC 606 was recorded as a refund liability. The refund liability is considered a debt arrangement with zero coupon interest and the Company imputes
interest  on  the  refund  liability  at  a  rate  of  15.0%  per  annum,  which  was  determined  based  on  certain  factors,  including  the  Company's  credit  rang,
comparable  securies  yield  and  the  expected  repayment  period.  On  March  18,  2022,  when  the  $40.0  million  was  received  from  CSL  Vifor,  the  Company
recorded an inial discount on the refund liability to the customer and a corresponding deferred gain to the refund liability to customer in the consolidated
balance sheet. The discount on the note payable is being amorzed to interest expense using the effecve interest method over the expected term of the
Vifor  Agreement.  The  deferred  gain  is  being  amorzed  to  interest  income  on  a  straight-line  basis  over  the  expected  term  of  the  Vifor  Agreement.  The
amorzaon  of  the  discount  was  $3.1  million  and  $3.4  million  for  the  years  ended  December  31,  2023  and  2022,  respecvely.  The  amorzaon  of  the
deferred gain was $4.0 million and $2.4 million for the years ended December 31, 2023 and 2022, respecvely. As of December 31, 2023, the $40.1 million
total refund liability is classified as a long-term liability based on management's esmated ming of the repayment of the refund liability to Vifor exceeding
one year.

Liability Related to Sale of Future Royales

In February 2021, the Company entered into a royalty interest acquision agreement with HealthCare Royalty Partners IV, L.P., or HCR, or Royalty Agreement,
pursuant to which the Company sold to HCR its right to receive royales and sales milestones for vadadustat in Japan and certain other Asian countries, such
countries collecvely, the MTPC Territory, and such payments collecvely the Royalty Interest Payments,  in  each  case,  payable  to  the  Company  under  the
MTPC Agreement. The Royalty Interest Payments are subject to an annual maximum “cap” of $13.0 million, aer which the Company will receive 85% of the
Royalty Interest Payments for the remainder of that year. The Royalty Interest Payments are also subject to an aggregate maximum “cap” of $150.0 million,
aer which the Royalty Interest Payments will revert back to the Company.

The Company was eligible to receive an addional $5.0 million in each year from 2021 through 2023 under the Royalty Agreement if specified annual sales
milestones  were  achieved  for  vadadustat  in  the  MTPC  Territory,  subject  to  the  sasfacon  of  certain  customary  condions.  The  sales  milestones  for
vadadustat  in  the  MTPC  Territory  were  not  achieved  for  2023,  2022  or  2021.  The  Company  retains  the  right  to  receive  all  potenal  future  regulatory
milestones for vadadustat under the MTPC Agreement. The Royalty Agreement will terminate on the earlier of the date on which HCR has received (i) the last
Royalty  Interest  Payment  or  (ii)  payment  by  the  Company  of  an  amount  equal  to  the  Aggregate  Cap  minus  the  aggregate  amount  of  all  Royalty  Interest
Payments actually received by HCR.

At the transacon date, the Company recognized the proceeds received from HCR of $44.8 million (net of certain transacon expenses) as a liability and is
amorzing it using the effecve interest method over the life of the arrangement. The liability related to sale of future royales and the debt amorzaon are
based on the Company’s current esmates of future royales expected to be paid over the life of the arrangement. To the extent the Company’s esmates of
future royalty payments are greater or less than previous esmates or the esmated ming of such payments is materially different than previous esmates,
the  Company  will  adjust  the  effecve  interest  rate  and  recognize  related  non-cash  interest  expense  on  a  prospecve  basis.  In  the  event  the  Company's
esmates of future royales are less than the proceeds from the sale of future royales, the Company will not recognize related non-cash interest expense.
On a quarterly basis, the Company assesses the expected royalty payments. The annual effecve interest rate as of December 31, 2023 was 0% and, therefore
the  Company  did  not  recognize  any  non-cash  interest  expense  in  the  consolidated  statements  of  operaons  and  comprehensive  loss.  As  a  result  of  the
Company's ongoing involvement in the cash flows related to the royales and sales milestones in the MTPC Territory, the Company will connue to account
for the royales received as non-cash royalty revenue which is reflected within license, collaboraon and other revenue in the consolidated statements of
operaons and comprehensive loss.

During the year ended December 31, 2023 and 2022, the Company paid $2.0 million and $1.8 million of royales to HCR and as of year end the balances were
is 

thousands): 

follows 

(in 

as 

Liability related to the sale of future royales:
Current poron (included in accrued expenses and other current liabilies)
Long-term poron

Total liability related to sale of future royales

December 31,

2023

2022

$

$

2,048 
54,013 
56,061 

$

$

— 
57,484 
57,484 

The Royalty Agreement requires the Company to take certain acons, including acons with respect to the Royalty Interest Payments, the MTPC Agreement,
and the Company's intellectual property. The Royalty Agreement also contains certain representaons and warranes, covenants, indemnificaon obligaons,
events of default and other provisions that are

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customary for a royalty monezaon transacon of this nature. In addion, the Company granted HCR a precauonary security interest in connecon with
the Royalty Interest Payments.

MTPC Supply Agreement

See  Note  12,  License,  Collaboraon  and  Other  Revenues,  for  further  informaon  on  short-term  deferred  revenue  as  of  December  31,  2022  that  was
recognized during the year ended December 31, 2023.

9.     LEASES

Cambridge Leases

Under  the  Cambridge  Lease,  the  Company  leases  approximately  65,167  square  feet  of  office,  storage  and  laboratory  space  in  Cambridge,  Massachuses,
which are non-cancelable operang leases. 5,951 square feet of the laboratory space is set to expire on January 31, 2025, with an extension opon for one
addional period through September 11, 2026 and 59,216 office and storage space are set to expire on September 11, 2026, with one five-year extension
opon available. In addion to rent, certain leases require the Company to pay addional amounts for taxes, insurance, maintenance, and other operang
expenses.

All of the Company's leases are classified as operang leases. The renewal opon in this real estate lease was not included in the calculaon of the operang
lease  asset  and  operang  lease  liability  as  the  renewal  is  not  reasonably  certain.  The  lease  agreements  do  not  contain  residual  value  guarantees.  The
components of lease right-of-use assets and lease liabilies are included in the consolidated balance sheets. Operang lease liabilies are based on the net
present value of the remaining lease payments over the remaining lease term. In determining the present value of lease payments, the Company used its
incremental  borrowing  rate  when  measuring  operang  lease  liabilies.  In  arriving  at  the  operang  lease  liabilies,  the  Company  applied  incremental
borrowing  rates  ranging  from  6.65%  to  6.94%,  which  were  based  on  the  remaining  lease  term  at  either  the  date  of  adopon  of  ASC  842,  Leases,  or  the
effecve date of any subsequent lease term extensions. As of December 31, 2023, the remaining lease term for the Cambridge Leases was 2.70 years.

Operang lease costs were $5.7 million and $7.1 million for the years ended December 31, 2023 and 2022, respecvely. Cash paid for amounts included in
the measurement of operang lease liabilies were $5.9 million and $7.2 million for the years ended December 31, 2023 and 2022, respecvely. The security
deposit in connecon with the Cambridge Lease is $1.7 million in the form of a leer of credit, which is included as restricted cash in other long-term assets in
the Company's consolidated balance sheet as of December 31, 2023.

Sublease and Former Boston Lease

Previously, the Company leased 27,924 square feet of office space in Boston, Massachuses, or the Boston Lease, under a non-cancelable operang lease
that was set to expire in July 2031. The Company subleased the enre Boston Lease, effecve October 2019 through February 2023. The Company recorded
$0.3 million and $1.8 million in rental income as other income in the consolidated statements of operaons and comprehensive loss during the years ended
December 31, 2023 and 2022, respecvely.

In May 2023, pursuant to a Lease Assignment Agreement, or the Lease Assignment Agreement, the Company assigned all of its rights, tle, and interest in, to,
and under the Boston Lease to LG Chem Life Sciences Innovaon Center, Inc., or LG Chem, and made a payment to LG Chem of $1.3 million. As of May 2023,
LG Chem assumed all of the rights and obligaons of the Company under the Boston Lease and the Company has no further obligaons for rent or other
payments under the Boston Lease. In accordance with ASC 842, Leases, the Company wrote off the right-of-use asset and lease liability associated with the
Boston Lease, and recognized the difference between the right-of-use asset and the lease liability offset by the $1.3 million payment as a loss on lease
terminaon in the consolidated statements of operaons and comprehensive loss of $0.5 million. Under the terms of the Lease Assignment Agreement the
Company was entled to, and received back, its security deposit of $1.0 million which had been recorded as restricted cash in other long-term assets in the
Company's consolidated balance sheet as of December 31, 2022.

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Future Lease Commitments

Future commitments under non-cancelable Cambridge Leases are as follows (in thousands):

2024
2025
2026
Total lease commitments
Less: present value adjustment
Current and long-term operang lease liabilies

10. COMMITMENTS AND CONTINGENCIES

Manufacturing and Uncondional Purchase Commitment Agreements

Siegfried Manufacturing

Operang
Leases

5,261 
5,819 
3,613 
14,693 
(1,255)
13,438 

$

$

$

The Company's contractual obligaons include a commercial supply agreement with Siegfried Evionnaz, or Siegfried, to supply commercial drug substance for
Auryxia. The Company and Siegfried entered into a Master Manufacturing Services and Supply Agreement, most recently amended in February 2023, or the
Siegfried Agreement, under which the Company has agreed to purchase a minimum quanty of drug substance of Auryxia, annually at a predetermined price.
As of December 31, 2023, the Company had a minimum total commitment of approximately $29.6 million through the end of 2026.

The term of the Siegfried Agreement was set to expire on December 31, 2024, subject to the Company’s opon to extend the term through December 31,
2026. The Company provided Siegfried with wrien noce of its elecon to extend the term of the Siegfried Agreement through December 31, 2026. The
Siegfried Agreement provides the Company and Siegfried with certain early terminaon rights.

In connecon with the extension of the Siegfried Agreement and the related increase in contractual purchase commitments, the Company recorded an excess
firm purchase commitment liability in other long-term liabilies of $1.5 million and corresponding expense to cost of product and other revenue during the
year ended December 31, 2023.

Patheon Manufacturing

In  March  2020,  the  Company  entered  into  a  Supply  Agreement  with  Patheon  Inc.,  or  Patheon,  or  the  Patheon  Agreement,  under  which  Patheon  will
manufacture vadadustat drug product for commercial use under a volume-based pricing structure through June 30, 2025, renewing annually unless either
party gives the other party eighteen months' prior wrien noce. Under the Patheon Agreement, the Company agreed to purchase from Patheon a certain
percentage of the esmated global demand for vadadustat drug product based on certain quarterly and annual forecasts provided by the Company. As of
December 31, 2023, the Company had no minimum commitment with Patheon, however, as esmated global demand fluctuates, the Company may have
future obligaons under the Patheon Agreement.

WuXi STA Manufacturing

In April 2020, the Company entered into a Supply Agreement with STA Pharmaceucal Hong Kong Limited, a subsidiary of WuXi AppTec, or WuXi STA, or, as
amended, the WuXi STA DS Agreement. Under the WuXi STA DS Agreement, WuXi STA will manufacture vadadustat drug substance for commercial use under
a volume-based pricing structure through April 2, 2024. Pursuant to the WuXi STA DS Agreement, the Company has agreed to purchase a certain percentage
of the global demand for vadadustat drug substance from WuXi STA. As of December 31, 2023, the Company has commied to purchase $13.4 million of
vadadustat drug substance from WuXi STA through the end of 2024.

On  February  10,  2021,  the  Company  entered  into  a  Supply  Agreement  with  WuXi  STA,  or  the  WuXi  STA  DP  Agreement,  under  which  WuXi  STA  will
manufacture  and  supply  vadadustat  drug  product  for  commercial  purposes  under  a  volume-based  pricing  structure  through  February  10,  2025.  The
vadadustat drug product price is reviewed annually by the Company and WuXi STA. The Company also reimburses WuXi STA for certain reasonable expenses.
Pursuant to the WuXi STA DP Agreement, the Company has agreed to purchase a certain percentage of global demand for vadadustat drug product from WuXi
STA. The WuXi STA DP Agreement may be renewed or extended by mutual agreement of the Company and WuXi STA with at least eighteen months’ prior
wrien noce. The WuXi STA DP Agreement allows the Company to terminate the relaonship on 180 calendar days’ prior wrien noce to WuXi STA for any
reason. In addion, each party has the ability to terminate the WuXi STA DP Agreement upon the occurrence of certain condions.

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Esteve - Assigned Supply Agreement

On April 9, 2019, the Company and Esteve Química, S.A., or Esteve, entered into a Supply Agreement, or the Esteve Agreement, which included the terms and
condions under which Esteve would manufacture vadadustat drug substance for commercial use under a volume-based pricing structure. On December 16,
2022, the Company, MTPC, and Esteve executed the Esteve Assignment Agreement, pursuant to which the Esteve Agreement was assigned to MTPC. The
Esteve Assignment Agreement transferred the rights and obligaons of the Esteve Agreement to MTPC, specifically including the obligaons under certain
purchase orders issued by the Company and accepted by Esteve. As such, the Company will have no further obligaon to take delivery of or pay for product
delivered by Esteve under the transferred Esteve Agreement.

BioVectra - Former Manufacturing and Uncondional Purchase Commitments

Under the Manufacture and Supply Agreement with BioVectra and the Amended and Restated Product Manufacture and Supply and Facility Construcon
Agreement  with  BioVectra,  the  Company  agreed  to  purchase  minimum  quanes  of  Auryxia  drug  substance  annually  at  predetermined  prices  as  well  as
reimburse BioVectra for certain costs in connecon with construcon of a new facility for the manufacture and supply of Auryxia drug substance.

On  December  22,  2022,  the  Company  and  BioVectra  entered  into  a  terminaon  agreement,  under  which  the  pares  agreed,  among  other  things,  to
terminate,  effecve  immediately,  any  and  all  exisng  agreements  entered  into  between  the  pares  in  connecon  with  the  manufacture  and  supply,  by
BioVectra to the Company, of Auryxia drug substance. In the terminaon agreement, the Company and BioVectra released one another from all exisng and
future claims and liabilies and the return of certain materials and documents. In addion, the Company agreed to pay BioVectra a total of $32.5 million
consisng of (i) an upfront payment of $17.5 million and (ii) six quarterly payments of $2.5 million commencing in April 2024, totaling $15.0 million. The
upfront  payment  of  $17.5  million  was  made  during  the  quarter  ended  December  31,  2022  and  was  recorded  in  cost  of  product  and  other  revenue.  In
accordance with ASC 420, Exit or Disposal Cost Obligaons, the Company recognized a liability and corresponding expense for the remaining terminaon fees
based on esmated fair value as of December 22, 2022. The Company imputed interest on the liability for the remaining terminaon fees at a rate of 17.0%
per  annum,  which  was  determined  based  on  certain  factors,  including  the  Company's  credit  rang,  comparable  securies  yield  and  expected  repayment
period of the remaining terminaon fees. The Company recorded an inial discount on the remaining terminaon fees in the consolidated balance sheet on
the date of the terminaon. This resulted in the recording of a liability and corresponding charge to cost of goods sold of $11.2 million during the quarter
ended December 31, 2022. The discount on the liability balance is being amorzed to interest expense using the effecve interest rate method over the term
of the liability. The amorzaon of the discount was $1.9 million for the year ended December 31, 2023.

In-Licensing - Panion License Agreement

On  April  17,  2019,  the  Company  and  Panion  &  BF  Biotech,  Inc.,  or  Panion,  entered  into  a  second  amended  and  restated  license  agreement,  or  Panion
Amended License Agreement, which amended and restated in full the license agreement between the Company and Panion. The Panion Amended License
Agreement provides the Company with an exclusive license under Panion-owned know-how and patents covering the rights to sublicense, develop, make,
use, sell, offer for sale, import and export ferric citrate worldwide, excluding certain Asian-Pacific countries, or the Licensor Territory. The Panion Amended
License  Agreement  also  provides  Panion  with  an  exclusive  license  under  Company-owned  patents  covering  the  rights  to  sublicense  (with  the  Company’s
wrien  consent),  develop,  make,  use,  sell,  offer  for  sale,  import  and  export  ferric  citrate  in  certain  countries  in  the  Licensor  Territory.  Under  the  Panion
Amended License Agreement, Panion is eligible to receive from the Company or any sublicensee royalty payments based on a mid-single digit percentage of
sales of ferric citrate in the Company’s licensed territories. The Company is eligible to receive from Panion or any sublicensee royalty payments based on
a mid-single digit percentage of net sales of ferric citrate in Panion’s licensed territories.

The Panion Amended License Agreement terminates upon the expiraon of each of the Company’s and Panion’s obligaons to pay royales thereunder. In
addion,  the  Company  may  terminate  the  Panion  Amended  License  Agreement  (i)  in  its  enrety  or  (ii)  with  respect  to  one  or  more  countries  in  the
Company’s licensed territory, in either case upon ninety days’ noce. The Company and Panion also each have the right to terminate the Panion Amended
License  Agreement  upon  the  occurrence  of  a  material  breach  of  the  Panion  Amended  License  Agreement  by  the  other  party,  subject  to  certain  cure
provisions,  or  certain  insolvency  events.  The  Panion  Amended  License  Agreement  also  provides  that,  on  a  country-by-country  basis,  unl  the  second
anniversary of the expiraon of the obligaon of the Company or Panion, as applicable, to pay royales in a country in which such party has ferric citrate for
sale on the date of such expiraon, neither the other party nor its affiliates will, directly or indirectly, sell, distribute or otherwise commercialize or supply or
cause to supply ferric citrate to a third party for sale or distribuon in such country.

The Panion Amended License Agreement includes customary terms relang to, among others, indemnificaon, confidenality, remedies, and representaons
and warranes. In addion, the Panion Amended License Agreement provides that each of the Company and Panion has the right, but not the obligaon, to
conduct ligaon against any infringer of certain patent rights under the Panion Amended License Agreement in certain territories.

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During the years ended December 31, 2023 and 2022, the Company incurred approximately $10.0 million and $13.8 million, respecvely, in royalty payments
due to Panion relang to the Company’s sales of Auryxia in the U.S. and JT and Torii’s net sales of Riona in Japan.

Other Third Party Contracts

The Company contracts with various organizaons to conduct R&D acvies with remaining contract costs to the Company of approximately $44.7 million at
December 31, 2023. The scope of the services under these R&D contracts can be modified and the contracts cancelled by the Company upon wrien noce.
In some instances, the contracts may be cancelled by the third party upon wrien noce.

Ligaon and Related Maers

The Company is involved from me to me in various legal proceedings arising in the normal course of business. Loss conngency provisions are recorded for
probable and esmable losses at our best esmate of a loss or, when a best esmate cannot be made, at our esmate of the minimum loss. These esmates
are  oen  developed  prior  to  knowing  the  amount  of  the  ulmate  loss,  require  the  applicaon  of  significant  judgment  and  are  refined  as  addional
informaon becomes known. Accordingly, we are oen inially unable to develop a best esmate of loss and therefore the esmated minimum loss amount,
which could be zero, is recorded. Changes in the Company’s esmates could have a material impact. Although the outcomes of potenal legal proceedings are
inherently  difficult  to  predict,  the  Company  does  not  expect  the  resoluon  of  current  legal  proceedings  to  have  a  material  adverse  effect  on  its  financial
posion, results of operaons or cash flows of the Company.

Guarantees and Indemnificaons

As permied under Delaware law, the Company may indemnify its officers, directors and employees for certain events or occurrences that happen by reason
of  their  relaonship  with,  or  posion  held  at,  the  Company.  The  Company  may  also  be  subject  to  indemnificaon  obligaons  by  law  with  respect  to  the
acons of its employees under certain circumstances and in certain jurisdicons. The Company maintains director and officer liability insurance coverage that
is intended to cover a poron of amounts that may be due with respect to indemnificaon aer a deducble is met. Further, the Company is a party to a
variety of agreements in the ordinary course of business under which it may be obligated to indemnify third pares with respect to certain maers. For the
years  ended  December  31,  2023  and  2022,  the  Company  did  not  experience  any  losses  related  to  these  indemnificaon  obligaons,  and  no  claims  were
outstanding as of December 31, 2023. The Company does not have any claims related to these indemnificaon obligaons and consequently concluded that
the fair value of these obligaons is negligible and no related accruals were recorded.

11. PRODUCT REVENUE AND RESERVES FOR VARIABLE CONSIDERATION

To  date,  the  Company’s  only  source  of  product  revenue  has  been  from  the  U.S.  sales  of  Auryxia.  Total  net  product  revenue  was  $170.3  million  and
$176.9 million for the years ended December 31, 2023 and 2022, respecvely. Product revenue allowance and reserve categories were as follows:

(in thousands)
Balance at December 31, 2021

Current provisions related to sales in current year
Adjustments related to prior year sales
Credits/payments made
Balance at December 31, 2022

Current provisions related to sales in current year
Adjustments related to prior year sales
Credits/payments made
Balance at December 31, 2023

Chargebacks
and
Discounts

Rebates, Fees
and other
Deducons

Returns

Total

$

$

$

1,047  $

11,412 
(9)
(11,191)

1,259  $

11,138 
(304)
(10,486)

1,607  $

24,478  $
89,095 
401 
(87,722)
26,252  $

79,648 
(1,506)
(81,403)
22,991  $

10,065  $
5,603 
(26)
(4,719)
10,923  $

6,181 
1,648 
(11,836)

6,916  $

35,590 
106,110 
366 
(103,632)
38,434 

96,967 
(162)
(103,725)
31,514 

Chargebacks, discounts and esmated product returns are recorded as a reducon of revenue in the period the related product revenue is recognized in the
consolidated statements of operaons and comprehensive loss. Chargebacks are recorded as a reducon to accounts receivable while discounts, rebates, fees
and other deducons are recorded with a corresponding increase to accrued expenses and other current liabilies or accounts payable in the consolidated
balance sheets. Esmated product returns on product sales that are not expected to be returned within one year are recorded as other long-term liabilies in
the consolidated balance sheets.

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Accounts receivable, net related to product sales was approximately $35.9 million and $37.3 million as of December 31, 2023 and 2022, respecvely.

12.  LICENSE, COLLABORATION AND OTHER REVENUE

The Company recognized the following revenues from its license, collaboraon and other revenue agreements (in thousands):

Enty
Medice
MTPC
JT and Torii
Otsuka

Descripon
License and Product Supply of Vadadustat in EU
License and Product Supply of Vadadustat in Japan
License and royales related to the sale of Riona in Japan
Terminated U.S. and Internaonal Agreements

Total License, Collaboraon and Other Revenue

Years Ended December 31,
2022
2023

10,968  $
5,735 
5,394 
2,225 
24,322  $

— 
17,968 
5,291 
92,276 
115,535 

$

$

The  following  table  presents  changes  in  the  Company’s  contract  assets  and  liabilies  related  to  license,  collaboraon  and  other  revenue  agreements  (in
thousands):

Contract assets:

Accounts receivable
Prepaid expenses and other current assets

(1)

Contract liability:

Deferred revenue (current and long-term)

Contract assets:

Accounts receivable
Prepaid expenses and other current assets

(1)

Contract liabilies:

Deferred revenue (current and long-term)
Accounts payable

Twelve Months Ended December 31, 2023

Balance at
Beginning of
Period

Addions

Deducons

Balance at End
of Period

1,901  $
781  $

10,088  $
—  $

(8,656) $
(781) $

3,333 
— 

47,034  $

—  $

(3,738) $

43,296 

Twelve Months Ended December 31, 2022

Balance at
Beginning of
Period

Addions

Deducons

Balance at End
of Period

19,094  $
4,309  $

42,380  $
3,171  $

94,515  $
9,550  $

70,044  $
—  $

(111,708) $
(13,078) $

(65,390) $
(3,171) $

1,901 
781 

47,034 
— 

$
$

$

$
$

$
$

(1) Excludes accounts receivable from product sales of Auryxia which are included in the accompanying consolidated balance sheets as of December 31,

2023 and 2022. 

During  the  years  ended  December  31,  2023  and  2022,  the  Company  recognized  the  following  revenues  as  a  result  of  changes  in  the  contract  asset  and
contract liability balances in the respecve periods (in thousands):

Revenue Recognized in the Period from:
Deferred revenue - beginning of the period
Performance obligaons sasfied in previous periods

Medice License Agreement

Years Ended December 31,
2022
2023

$
$

3,738  $
—  $

29,574 
— 

On May 24, 2023, or Medice Effecve Date, the Company and MEDICE Arzneimiel Püer GmbH & Co. KG, or Medice, entered into a License Agreement, or
the Medice License Agreement, pursuant to which the Company granted to Medice an exclusive license to develop and commercialize vadadustat for the
treatment of anemia in adult paents with chronic kidney disease in European Economic Area, the UK, Switzerland and Australia, or the Medice Territory.

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Under the Medice License Agreement, the Company received an up-front payment of $10.0 million and is eligible to receive the following payments:

(i)     commercial milestone payments up to an aggregate of $100.0 million, and

(ii)     ered royales ranging from 10% to 30% of Medice's annual net sales of vadadustat in the Medice Territory, subject to reducon in certain

circumstances.

The royales will expire on a country-by-country basis upon the latest to occur of (a) the date of expiraon of the last-to-expire valid claim of any Company,
Medice  or  joint  patent  that  covers  vadadustat  in  such  country  in  the  Medice  Territory,  (b)  the  date  of  expiraon  of  data  or  regulatory  exclusivity  for
vadadustat in such country in the Medice Territory and (c) the date that is twelve years from first commercial sale of vadadustat in such country in the Medice
Territory.

Under  the  Medice  License  Agreement,  the  Company  retains  the  right  to  develop  vadadustat  for  non-dialysis  paents  with  anemia  due  to  chronic  kidney
disease  in  the  Medice  Territory.  If  the  Company  develops  vadadustat  for  non-dialysis  paents  and  vadadustat  receives  markeng  approval  in  the  Medice
Territory,  Medice  will  commercialize  vadadustat  for  both  indicaons  in  the  Medice  Territory.  In  this  instance,  the  Company  would  receive  70%  of  the  net
product margin of any sales of vadadustat in the non-dialysis paent populaon, unless Medice requests to share the cost of the development necessary to
gain  approval  to  market  vadadustat  for  non-dialysis  paents  in  the  Medice  Territory  and  the  pares  agree  on  alternave  financial  terms.  If  the  Company
develops vadadustat for non-dialysis paents, the Company has determined that the acvies under the Medice License Agreement represent joint operang
acvies  in  which  both  pares  are  acve  parcipants  and  of  which  both  pares  are  exposed  to  significant  risks  and  rewards  that  are  dependent  on  the
success  of  the  acvies.  Accordingly,  if  the  Company  develops  vadadustat  for  non-dialysis  paents  the  Company  will  account  for  the  joint  acvies  in
accordance with ASC No. 808, Collaborave Arrangements, or ASC 808. Addionally, the Company has determined that in the context of the development of
vadadustat for non-dialysis paents, Medice does not represent a customer as contemplated by ASC 606-10-15, Revenue from Contracts with Customers –
Scope and Scope Excepons. As a result, the acvies conducted pursuant to development acvies for vadadustat for non-dialysis paents will be accounted
for as a component of the related expense in the period incurred.

The Medice License Agreement expires on the date of expiraon of all payment obligaons due thereunder with respect to vadadustat in the last country in
the Medice Territory, unless earlier terminated in accordance with the terms of the Medice License Agreement. Either party may, subject to a cure period,
terminate the Medice License Agreement in the event of the other party's uncured material breach. Medice has the right to terminate the Medice License
Agreement in its enrety for convenience upon twelve months' prior wrien noce delivered on or aer the date that is twelve months aer the Medice
Effecve Date.

The  Medice  License  Agreement  provides  that  the  Company  and  Medice  will  enter  into  a  supply  agreement  pursuant  to  which  the  Company  will  supply
vadadustat to Medice for commercial use in the Medice Territory. As of December 31, 2023, the Company and Medice have not yet entered into a supply
agreement.

The Company evaluated the elements of the Medice License Agreement in accordance with the provisions of ASC 606 and concluded Medice is a customer.
The Company idenfied one performance obligaon in connecon with its obligaons under the Medice License Agreement, which is the license, or License
Performance Obligaon. The transacon price at incepon was comprised of the up-front payment of $10.0 million, of which the Company received $8.6
million during the quarter ended June 30, 2023. The remaining $1.4 million was withheld by the German Federal Tax Office and is included in other long-term
assets in the consolidated balance sheet as of December 31, 2023.

Pursuant  to  the  terms  of  the  Medice  License  Agreement,  the  up-front  payment  of  $10.0  million  is  non-refundable  and  non-creditable  against  any  other
amount  due  to  the  Company  and  was  allocated  to  the  License  Performance  Obligaon,  which  was  sasfied  as  of  the  Medice  Effecve  Date.  As  such,  the
Company  recognized  the  $10.0  million  up-front  payment  as  License,  collaboraon  and  other  revenue  in  the  consolidated  statement  of  operaons  and
comprehensive loss during the year ended December 31, 2023.

In accordance with ASC 606, the Company will recognize sales-based royales and milestone payments at the later of when the performance obligaon is
sasfied or the related sales occur.

Medice Leer Agreement

On December 6, 2023, the Company and Medice entered into a leer agreement, or the Medice Leer Agreement, pursuant to which the Company agreed to
sell to Medice a paral batch of vadadustat in order to achieve packaging validaon for the Medice Territory. The Company recognizes revenue under this
arrangement when risk of loss passes to Medice and delivery has occurred. During the year ended December 31, 2023, the Company recognized $1.0 million
in  collaboraon  revenue  under  the  Medice  Side  Leer.  As  of  December  31,  2023,  there  was  $0.9  million  in  accounts  receivable  and  no  contract  assets,
payables or deferred revenue recorded in connecon with the Medice Leer Agreement.

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Table of Contents

MTPC Collaboraon Agreement

On  December  11,  2015,  the  Company  and  Mitsubishi  Tanabe  Pharma  Corporaon,  or  MTPC,  entered  into  the  MTPC  Agreement,  providing  MTPC  with
exclusive development and commercializaon rights to vadadustat in Japan and certain other Asian countries, collecvely, the MTPC Territory,  which  was
amended effecve as of December 2, 2022. In addion, the Company supplies vadadustat to MTPC for both clinical and commercial use in the MTPC Territory.
In February 2021, the Company entered into the Royalty Agreement with HCR, whereby the Company sold its right to receive royales and sales milestones
under the MTPC Agreement, subject to certain caps and other terms and condions. See Note 8, Deferred Revenue, Refund Liability and Liability Related to
Sale of Future Royales, for more informaon.

Unless earlier terminated, the MTPC Agreement will connue in effect on a country-by-country basis unl the later of the following: expiraon of the last-to-
expire  patent  covering  vadadustat  in  such  country  in  the  MTPC  Territory;  expiraon  of  markeng  or  regulatory  exclusivity  in  such  country  in  the  MTPC
Territory; or ten years aer the first commercial sale of vadadustat in such country in the MTPC Territory. MTPC may terminate the MTPC Agreement upon
twelve  months’  noce  at  any  me  aer  the  second  anniversary  of  the  effecve  date  of  the  MTPC  Agreement.  Either  party  may  terminate  the  MTPC
Agreement upon the material breach of the other party that is not cured within a specified me period or upon the insolvency of the other party.

Under the MTPC Agreement, MTPC is required to make certain milestone payments to the Company aggregang up to approximately $225.0 million upon the
achievement of specified development, regulatory and commercial events. The Company has received $10.0 million in development milestone payments. Of
the $40.0 million in regulatory milestone payments the Company is eligible for, the Company received $10.0 million in relaon to the Japanese NDA filing in
the third quarter of 2019 and $15.0 million following regulatory approval of vadadustat in Japan in the third quarter of 2020. The Company is also entled to
receive up to $175.0 million in commercial milestone payments associated with aggregate sales of all products. In consideraon for the exclusive license and
other  rights  contained  in  the  MTPC  Agreement,  MTPC  made  a  $20.0  million  upfront  payment  as  well  as  a  $20.5  million  payment  for  Phase  2  studies  in
Japanese paents completed by the Company and reimbursed by MTPC. Addionally, the Company is entled to receive ered royalty payments ranging from
13% to 20% on annual net sales of vadadustat in the MTPC Territory, subject to reducon in certain circumstances.

The Company evaluated the elements of the MTPC Agreement in accordance with the provisions of ASC 606 and concluded that the contract counterparty,
MTPC, is a customer. The Company idenfied two performance obligaons in connecon with its material promises under the MTPC Agreement as follows: (i)
License, Research and Clinical Supply Performance Obligaon and (ii) Rights to Future Know-How Performance Obligaon.

The transacon price was comprised of: (i) the up-front payment of $20.0 million, (ii) the cost for the Phase 2 studies of $20.5 million, (iii) the cost of all
clinical supply provided to MTPC for the Phase 3 studies, (iv) $10.0 million in development milestones received, (v) $25.0 million in regulatory milestones
received and (vi) $5.0 million in royales from net sales of Vafseo. The Company re-evaluates the transacon price in each reporng period and as uncertain
events are resolved or other changes in circumstances occur. As of December 31, 2023, all development milestones and $25.0 million in regulatory milestones
have been achieved. No other regulatory milestones or commercial milestones have been assessed as probable and have been fully constrained unl the
period in which they are achieved.

The Company allocates the transacon price to each performance obligaon based on the Company’s best esmate of the relave standalone selling price.
The Company developed a best esmate of the standalone selling price for the Rights to Future Know-How Performance Obligaon primarily based on the
likelihood that addional intellectual property covered by the license conveyed will be developed during the term of the arrangement and determined it is
immaterial.  As  such,  the  Company  did  not  develop  a  best  esmate  of  standalone  selling  price  for  the  License,  Research  and  Clinical  Supply  Performance
Obligaon and allocated the enre transacon price to this performance obligaon.

Revenue for the License, Research and Clinical Supply Performance Obligaon for the MTPC Agreement is being recognized using a proporonal performance
method, for which all deliverables have been completed. The Company recognizes any revenue from MTPC royales in the period in which the sales occur.
The Company recognized $2.0 million and $1.8 million of revenue for royales from the net sales of Vafseo during the years ended December 31, 2023 and
2022, respecvely. As noted above, in February 2021, the Company entered into the Royalty Agreement, whereby the Company sold its right to receive these
royales and sales milestones under the MTPC Agreement, subject to certain caps and other condions. See Note 8, Deferred Revenue, Refund Liability and
Liability  Related  to  Sale  of  Future  Royales,  for  more  informaon.  The  revenue  is  classified  as  collaboraon  revenue  in  the  accompanying  consolidated
statements  of  operaons  and  comprehensive  loss.  As  of  December  31,  2023,  there  were  no  accounts  receivable,  contract  assets,  payables  or  deferred
revenue recorded in connecon with the MTPC Agreement.

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Supply of Drug Product to MTPC

On July 15, 2020, the Company and MTPC entered into a supply agreement, or the MTPC Supply Agreement, under which the Company supplies vadadustat
drug product to MTPC for commercial use in Japan and certain other Asian countries, as contemplated by the MTPC Agreement. The term of the MTPC Supply
Agreement extends throughout the term of the MTPC Agreement, and the terminaon provisions of the MTPC Agreement govern terminaon of the MTPC
Supply Agreement. The Company does not recognize revenue under this arrangement unl risk of loss on the drug product passes to MTPC and delivery has
occurred and MTPC has accepted the product.

On  December  16,  2022,  the  Company,  MTPC  and  Esteve  Química,  S.A.,  or  Esteve,  executed  an  Assignment  of  Supply  Agreement,  or  Esteve  Assignment
Agreement, pursuant to which the Supply Agreement between the Company and Esteve, or Esteve Agreement was assigned to MTPC. The Esteve Assignment
Agreement  transferred  the  rights  and  obligaons  of  the  Company  under  the  Esteve  Agreement  to  MTPC.  The  Company  has  no  further  obligaon  to  take
delivery of, or pay for, product delivered by Esteve. See Note 10, Commitments and Conngencies, for more informaon.

During  the  years  ended  December  31,  2023  and  2022,  the  Company  recognized  $3.7  million  and  $16.2  million,  respecvely,  of  revenue  under  the  MTPC
Supply Agreement. Due to the Esteve Agreement, the Company no longer records accounts receivable, deferred revenue or other current liabilies relang to
the MTPC Supply Agreement.

JT and Torii Sublicense Agreement

The  Company  has  an  Amended  and  Restated  Sublicense  Agreement,  which  was  amended  in  June  2013,  with  JT  and  Torii,  or  JT  and  Torii  Sublicense
Agreement, under which JT and Torii obtained the exclusive sublicense rights for the development and commercializaon of ferric citrate hydrate in Japan. JT
and Torii are responsible for the future development and commercializaon costs in Japan.

The Company is eligible to receive royalty payments based on a ered low double-digit percentage of net sales of Riona in Japan inclusive of amounts that the
Company  must  pay  to  Panion  on  JT  and  Torii's  net  sales  of  Riona  under  the  Panion  License  Agreement  subject  to  certain  reducons  upon  expiraon  or
terminaon  of  the  Amended  and  Restated  License  Agreement  between  the  Company  and  Panion,  pursuant  to  which  Company  in-licensed  the  exclusive
worldwide rights, excluding certain Asian-Pacific countries, for the development and commercializaon of ferric citrate. The Company is entled to receive up
to an addional $55.0 million upon the achievement of certain annual net sales milestones.

The sublicense under the JT and Torii Sublicense Agreement terminates upon the expiraon of all underlying patent rights. Also, JT and Torii may terminate
the JT and Torii Sublicense Agreement with or without cause upon at least six months' prior wrien noce to the Company. Addionally, either party may
terminate the JT and Torii Sublicense Agreement for cause upon 60 days’ prior wrien noce aer the breach of any uncured material provision of the JT and
Torii Sublicense Agreement, or aer certain insolvency events.

The Company evaluated the elements of the JT and Torii Sublicense Agreement in accordance with the provisions of ASC 606 and concluded that the contract
counterparty,  JT  and  Torii,  is  a  customer.  The  Company  idenfied  two  performance  obligaons  in  connecon  with  its  obligaons  under  the  JT  and  Torii
Sublicense Agreement: (i) License and Supply Performance Obligaon and (ii) Rights to Future Know-How Performance Obligaon. The Company developed a
best esmate of the standalone selling price for the Rights to Future Know-How Performance Obligaon primarily based on the likelihood that addional
intellectual  property  covered  by  the  license  conveyed  will  be  developed  during  the  term  of  the  arrangement  and  determined  it  immaterial.  As  such,  the
Company did not develop a best esmate of standalone selling price for the License and Supply Performance Obligaon and allocated the enre transacon
price to this performance obligaon. Addionally, as of the consummaon of the Merger, the services associated with the License and Supply Performance
Obligaon were completed and JT and Torii had secured their own source to manufacture ferric citrate hydrate. As such, any inial license fees as well as any
development-based  milestones  and  manufacturing  fee  revenue  were  received  and  recognized  prior  to  the  Merger.  The  Company  determined  that  the
remaining consideraon that may be payable to the Company under the terms of the sublicense agreement are either quarterly royales on net sales or
payments due upon the achievement of sales-based milestones. In accordance with ASC 606, the Company recognizes sales-based royales and milestone
payments based on the level of sales, when the related sales occur as these amounts have been determined to relate predominantly to the license granted to
JT and Torii and therefore are recognized at the later of when the performance obligaon is sasfied, or the related sales occur.

During  the  years  ended  December  31,  2023  and  2022,  the  Company  recognized  $5.4  million  and  $5.3  million,  respecvely,  in  license  revenue  related  to
royales earned on net sales of Riona in Japan. The Company records the associated mid-single digit percentage of net sales royalty expense due to Panion,
the licensor of Riona, in the same period as the royalty revenue from JT and Torii is recorded.

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Prior Collaboraon and License Agreements

U.S. Collaboraon and License Agreement with Otsuka Pharmaceucal Co. Ltd.

On December 18, 2016, the Company entered into a collaboraon and license agreement, or Otsuka U.S. Agreement, with Otsuka Pharmaceucal Co. Ltd, or
Otsuka. The collaboraon was focused on the development and commercializaon of vadadustat in the U.S. The Company was responsible for leading the
development of vadadustat, for which it submied an NDA to the FDA in March 2021, and for which it received the CRL in March 2022.

Under the terms of the Otsuka U.S. Agreement, the Company granted to Otsuka a co-exclusive, non-sublicensable license under certain intellectual property
controlled by the Company solely to perform medical affairs acvies and to conduct non-promoonal and commercializaon acvies related to vadadustat
in accordance with the associated plans. The co-exclusive license related to acvies that would be jointly conducted by the Company and Otsuka under the
Otsuka U.S. Agreement.

The  Company  evaluated  the  elements  of  the  Otsuka  U.S.  Agreement  in  accordance  with  the  provisions  of  ASC  606  and  concluded  that  the  contract
counterparty,  Otsuka,  was  a  customer.  The  Company  idenfied  three  performance  obligaons  in  connecon  with  its  obligaons  under  the  Otsuka  U.S.
Agreement as follows: (i) License and Development Services Combined (License Performance Obligaon); (ii) Rights to Future Intellectual Property (Future IP
Performance  Obligaon)  and  (iii)  Joint  Commiee  Services  (Commiee  Performance  Obligaon).  The  Company  allocated  the  transacon  price  to  each
performance  obligaon  based  on  the  Company’s  best  esmate  of  the  relave  standalone  selling  price.  No  amounts  were  allocated  to  the  Future  IP
Performance Obligaon because the associated best esmate of standalone selling price was determined to be immaterial. Due to the similar performance
period and recognion paern between the License Performance Obligaon and the Commiee Performance Obligaon, the transacon price was allocated
to the License Performance Obligaon and the Commiee Performance Obligaon on a combined basis. The Company recognized revenue on a proporonal
performance basis as the underlying services were performed.

Pursuant  to  the  Otsuka  U.S.  Agreement,  the  Company  received:  (i)  the  up-front  payment  of  $125.0  million,  (ii)  the  cost  share  payment  with  respect  to
amounts incurred by the Company through December 31, 2016 of $33.8 million, and (iii) the net cost share consideraon received with respect to amounts
incurred by the Company under the global development plan of approximately $319.2 million with respect to amounts incurred by the Company subsequent
to December 31, 2016.

On  May  12,  2022,  the  Company  received  noce  from  Otsuka  that  Otsuka  had  elected  to  terminate  the  Otsuka  U.S.  Agreement  and  the  April  25,  2017
collaboraon  and  license  agreement  with  Otsuka,  or  Otsuka  Internaonal  Agreement.  On  June  30,  2022,  the  Company  and  Otsuka  entered  into  the
Terminaon  and  Selement  Agreement,  or  Otsuka  Terminaon  Agreement,  pursuant  to  which,  among  other  things,  the  Company  and  Otsuka  agreed  to
terminate the Otsuka U.S. Agreement and the Otsuka Internaonal Agreement as of June 30, 2022.

During  the  year  ended  December  31,  2023,  the  Company  recognized  $2.2  million  in  collaboraon  revenue  in  connecon  with  the  Packaging  Validaon
Transfer Agreement entered into with Otsuka on April 20, 2023. Under the Packaging Validaon Transfer Agreement, the pares agreed that responsibility for
all remaining packaging validaon acvies would be transferred from Otsuka to the Company in consideraon of payments made by Otsuka to the Company.
The Company evaluated the agreement under ASC 606 and concluded it was closely ed to the prior collaboraon revenue agreements and under ASC 606
recognized  collaboraon  revenue  in  the  current  year.  During  the  year  ended  December  31,  2022,  the  Company  recognized  collaboraon  revenue  totaling
approximately $86.8 million with respect to the Otsuka U.S. Agreement.

The Company accounted for the joint medical affairs, commercializaon and non-promoonal acvies elements of the Otsuka U.S. Agreement in accordance
with ASC No. 808, Collaborave Arrangements (ASC 808). Furthermore, these acvies were recognized for as a component of the related expense in the
period  incurred.  During  the  year  ended  December  31,  2023,  the  Company  incurred  no  costs  related  to  the  cost-sharing  provisions  of  the  Otsuka  U.S.
Agreement. During the year ended December 31, 2022, the Company incurred approximately $7.6 million of costs related to the cost-sharing provisions of
the Otsuka U.S. Agreement of which approximately $3.8 million were reimbursable by Otsuka and recorded as a reducon to R&D expense during the year
ended December 31, 2022.

Internaonal Collaboraon and License Agreement with Otsuka Pharmaceucal Co. Ltd.

On April 25, 2017, the Company entered into a collaboraon and license agreement with Otsuka, or the Otsuka Internaonal Agreement. The collaboraon
was  focused  on  the  development  and  commercializaon  of  vadadustat  in  Europe,  Russia,  China,  Canada,  Australia,  the  Middle  East  and  certain  other
territories, collecvely, the Otsuka Internaonal Territory. As discussed above, the Otsuka Internaonal Agreement was terminated on June 30, 2022 pursuant
to the Otsuka Terminaon Agreement.

The Company has accounted for the Otsuka Internaonal Agreement separately from the collaboraon arrangement with Otsuka with respect to the U.S. due
to  the  lack  of  interrelaonship  and  interdependence  of  the  elements  and  payment  terms  within  each  of  the  contracts  as  they  related  to  the  respecve
territories. Accordingly, the Company applied the guidance in ASC 606 solely in reference to the terms and condions of the Otsuka Internaonal Agreement,
while the Otsuka U.S.

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Agreement  connued  to  be  accounted  for  as  a  discrete  agreement  in  its  own  right.  The  Company  evaluated  the  Otsuka  Internaonal  Agreement  in
accordance with the provisions of ASC 606 and concluded that the contract counterparty, Otsuka, was a customer. The Company idenfied three performance
obligaons in connecon with its obligaons under the Otsuka Internaonal Agreement as follows: (i) License and Development Services Combined (License
Performance  Obligaon);  (ii)  Rights  to  Future  Intellectual  Property  (Future  IP  Performance  Obligaon)  and  (iii)  Joint  Commiee  Services  (Commiee
Performance Obligaon). The Company allocated the transacon price to each performance obligaon based on the Company’s best esmate of the relave
standalone selling price. No amounts were allocated to the Future IP Performance Obligaon because the associated best esmate of standalone selling price
was  determined  to  be  immaterial.  Due  to  the  similar  performance  period  and  recognion  paern  between  the  License  Performance  Obligaon  and  the
Commiee Performance Obligaon, the transacon price was allocated to the License Performance Obligaon and the Commiee Performance Obligaon on
a combined basis. The Company recognized revenue on a proporonal performance basis as the underlying services were performed.

Pursuant to the Otsuka Internaonal Agreement, the Company received: (i) the up-front payment of $73.0 million, (ii) the cost share payment with respect to
amounts incurred by the Company during the quarter ended March 31, 2017 of $0.2 million, and (iii) the net cost share consideraon received with respect to
amounts incurred by the Company subsequent to March 31, 2017 of $216.7 million.

During the year ended December 31, 2023, the Company recognized no revenue with respect to the Otsuka Internaonal Agreement. During the year ended
December 31, 2022, the Company recognized revenue totaling approximately $5.5 million with respect to the Otsuka Internaonal Agreement. The revenue is
classified as collaboraon revenue in the accompanying consolidated statements of operaons and comprehensive loss.

13. CAPITAL STOCK

Authorized and Outstanding Capital Stock

On June 5, 2020, the Company filed a Cerficate of Amendment to its Ninth Amended and Restated Cerficate of Incorporaon, or its Charter, to increase the
number of authorized shares of common stock from 175,000,000 to 350,000,000. As of December 31, 2023, the authorized capital stock of the Company
included 350,000,000 shares of common stock, par value $0.00001 per share, of which 194,582,539 and 184,135,714 shares were issued and outstanding at
December 31, 2023 and 2022, respecvely; and 25,000,000 shares of undesignated preferred stock, par value $0.00001 per share, of which no shares were
issued and outstanding at December 31, 2023 and 2022.

At-the-Market Facility

On April 7, 2022, the Company entered into an at-the-market, or ATM, sales agreement with Jefferies LLC, or Jefferies, as the Company's sales agent, under
which  the  Company  may  offer  and  sell  from  me  to  me  up  to  $26.0  million  of  shares  of  the  Company's  common  stock  in  negoated  transacons  or
transacons that are deemed to be an ATM offering. During the year ended December 31, 2023, the Company sold 6,189,974 shares of common stock under
this program for gross proceeds of $6.8 million ($6.7 million, net of offering expenses). During January and February 2024, the Company sold 13,261,311
shares of its common stock under the ATM sales agreement with gross proceeds of $19.2 million, ($18.7 million, net of offering expenses). The Company paid
the Agent commissions for its services of acng as agent of up to 3.0% of the gross proceeds from the sale of the common stock pursuant to the ATM.

Prior At-the-Market Facility

On  March  1,  2022,  the  Company  filed  a  prospectus  supplement  relang  to  the  Company's  sales  agreement  with  Cantor  Fitzgerald  &  Co.,  or  Prior  Sales
Agreement, pursuant to which it was authorized to offer and sell up to $25.3 million of its common stock at current market prices from me to me. On
March  16,  2022,  the  Company  terminated  the  Prior  Sales  Agreement.  During  the  year  ended  December  31,  2022,  the  Company  sold  404,600  shares  of
common stock under this program with net proceeds (aer deducng commissions and other offering expenses) of $0.8 million.

Unregistered Common Stock

In  connecon  with  the  Vifor  Agreement,  CSL  Vifor  owns  7,571,429  shares  of  common  stock  that  are  unregistered  under  the  Securies  Act.  See  Note  8,
Deferred Revenue, Refund Liability and Liability Related to Sale of Future Royales, for more informaon.

Warrants to Purchase Common Stock

In connecon with the BlackRock Credit Agreement, described in more detail in Note 7, Indebtedness, the Company issued a warrant to purchase 3,076,923
shares of the Company’s common stock, at an exercise price per share of $1.30, and upon borrowing of Tranche C, the Company will become obligated to
issue  addional  warrants  to  purchase  1,153,846  shares  of  the  Company’s  common  stock  at  an  exercise  price  per  share  of  $1.30.  Each  warrant  shall  be
exercisable for eight years from date

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Table of Contents

of  issuance.  The  warrants  and  the  common  stock  issuable  upon  the  exercise  of  such  warrants  were  not  registered  under  the  Securies  Act  of  1933.
Accordingly, the holder thereof may only sell common stock issued upon exercise of such warrants pursuant to an effecve registraon statement under the
Securies  Act  covering  the  resale  of  those  shares,  an  exempon  under  Rule  144  under  the  Securies  Act  or  another  applicable  exempon  under  the
Securies Act.

14. STOCK-BASED COMPENSATION AND EMPLOYEE RETIREMENT PLANS

Stock-Based Compensaon Plans

The Company incurred stock-based compensaon expenses of $9.3 million and $17.8 million for the years ended December 31, 2023 and 2022, respecvely.

Equity Incenve Plans

The following table contains informaon about the Company's equity incenve plans:

Title of Plan
(1)(2)

Keryx Equity Plans

(2)

Akebia Therapeucs, Inc.
Amended and Restated 2008
Equity Incenve Plan (the 2008
Plan)
Akebia Therapeucs, Inc. 2014
 (2) (3)
Incenve Plan, as amended
(the 2014 Plan)
(replaces 2008 Plan)
Akebia Therapeucs, Inc. 2023
Stock Incenve Plan  (the 2023
Plan)
(replaces 2014 Plan)

(3)

December 31, 2023

December 31, 2022

Group Eligible
Employees, directors and
consultants
Employees, directors and
consultants

Type of Award Granted (or
to be Granted)
Common stock opons and
RSUs
Common stock opons and
RSUs

Awards
Outstanding

232,203 

— 

Addional
Awards Available
for Grant

Awards
Outstanding

Addional
Awards
Available for
Grant

— 

— 

387,976 

419 

— 

— 

Employees, directors,
consultants and advisors

Common stock opons,
RSUs, SARs and
performance awards

Employees, officers,
directors, consultants and
advisors

Common stock opons,
SARs, restricted stock,
unrestricted stock, RSUs,
performance awards, other
share-based awards and
dividend equivalents

15,311,501 

— 

17,018,832 

5,498,984 

1,712,400 

17,382,722 

— 

— 

(1)     The Keryx Equity Plans consist of the Keryx Biopharmaceucals, Inc. 1999 Share Opon Plan, Keryx Biopharmaceucals, Inc., as amended, the 2004 Long-Term Incenve Plan, as amended,
the Keryx Biopharmaceucals, Inc. 2007 Incenve Plan, the Keryx Biopharmaceucals Inc. Amended and Restated 2013 Incenve Plan and the Keryx Biopharmaceucals, Inc. 2018 Equity
Incenve Plan.

(2)     New awards are no longer being granted under these plans.

(3)     This table includes the following inducement awards that are subject to the terms and condions of the applicable plan but were granted as inducement awards consistent with Nasdaq
Lisng Rule 5635(c)(4) and not under the applicable plan: 1,616,019 opons outstanding under the 2014 Plan and 794,000 opons outstanding under the 2023 Plan as of December 31,
2023 and 2,513,512 opons outstanding under the 2014 Plan as of December 31, 2022.

Common Stock Opons and Stock Appreciaon Rights

During the year ended December 31, 2023, the Company granted 2,489,500 opons to employees under the 2014 Plan and 315,000 opons to directors
under the 2023 Plan. During the year ended December 31, 2023, the Company granted 635,313 stock appreciate rights, or SARs, to one execuve under the
2014 Plan. Opons and SARs granted by the Company generally vest over periods of between 12 and 48 months, subject, in each case, to the individual’s
connued  service  through  the  applicable  vesng  date.  Opons  and  SARs  generally  vest  either  100%  on  the  first  anniversary  of  the  grant  date  or  in
installments of (i) 25% at the one year anniversary and (ii) 12 equal quarterly installments beginning aer the one year anniversary of the grant date, subject
to the individual’s connuous service with the Company. Opons and SARs generally expire ten years aer the date of grant.

The Company also maintains an inducement award program with a share pool that is separate from the Company's equity plans under which inducement
awards may be granted consistent with Nasdaq Lisng Rule 5635(c)(4). During the year ended December 31, 2023, the Company granted 845,000 opons to
purchase shares of the Company’s common stock to new hires as inducements to such employees entering into employment with the Company, of which
842,000 opons remained outstanding at December 31, 2023.

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The  Company  grants  annual  service-based  stock  opons  to  employees  and  directors  and  SARs  to  certain  execuves  under  the  2023  and  2014  Plans.  In
addion, the Company issues common stock opons to directors, new hires and occasionally to other employees not in connecon with the annual grant
process.

Finally, the Company grants performance-based stock opons which generally vest in connecon with the achievement of specified commercial, regulatory
and corporate milestones. The performance-based stock opons also generally feature a me-based vesng component. The expense recognized for these
awards is based on the grant date fair value of the Company’s common stock mulplied by the number of opons granted and recognized over me based on
the probability of meeng such commercial, regulatory and corporate milestones. The Company did not grant any performance-based stock opons under
the 2023 Plan or the 2014 Plan during the year ended December 31, 2023. The Company granted 400,000 performance-based opons during the year ended
December 31, 2022. The Company had 400,000 performance-based opons outstanding at December 31, 2023 and 2022.

The combined stock opon acvity for the year ended December 31, 2023, is as follows:

Outstanding, December 31, 2022
Granted
Exercised
Expired
Canceled and forfeited
Outstanding at December 31, 2023
Exercisable at December 31, 2023

Vested and expected to vest at December 31, 2023

Stock Opons

Weighted-Average
Exercise Price

11,775,411  $
4,284,813  $
(2,250) $
(528,099) $
(2,217,040) $
13,312,835  $
7,354,561  $
13,312,835  $

5.82 
0.84 
0.37 
5.16 
6.06 
4.20 
6.37 

4.20 

Weighted-Average
Contractual Life
(years)

Aggregate Intrinsic
Value 
(in thousands)

7.26 years $

180 

7.27 years $
6.05 years $

$

2,680 
792 

2,680 

There was immaterial intrinsic value of opons exercised during the years ended December 31, 2023 and 2022, as the value of opons exercised in 2023 and
2022  was  immaterial.  The  fair  value  of  opons  that  vested  during  the  years  ended  December  31,  2023  and  2022  were  $6.4  million  and  $8.4  million,
respecvely.  As  of  December  31,  2023,  there  was  approximately  $5.2  million  of  unrecognized  compensaon  cost  related  to  common  stock  opons
outstanding  under  the  Company’s  2023  Plan  or  the  2014  Plan  or  made  pursuant  to  the  Company's  inducement  award  program,  which  is  expected  to  be
recognized over a weighted average period of 2.19 years.

Restricted Stock Units

Generally, RSUs, granted by the Company vest in one of the following ways: (i) 100% of each RSU grant vests on the first anniversary of the grant date, (ii) one
third of each RSU grant vests on the first, second and third anniversaries of the grant date, (iii) 50% of each RSU grant vests on the first anniversary and 25%
of each RSU grant vests every six months aer the one year anniversary of the grant date, or (iv) one third of each RSU grant vests on the first anniversary of
the grant date and the remaining two thirds vests in eight substanally equal quarterly installments beginning aer the one year anniversary, subject, in each
case, to the individual’s connued service through the applicable vesng date. The grant-date fair value of the RSUs is recognized as expense on a straight-line
basis. The Company determines the fair value of the RSUs based on the closing price of the common stock on the date of the grants.

The Company also periodically grants performance-based restricted stock units, or PSUs,  to  employees  under  the  2023  Plan  and  previously  granted  PSUs
under the 2014 Plan. The PSUs granted by the Company generally vest in connecon with the achievement of specified commercial, regulatory and corporate
milestones. The PSUs also generally feature a me-based vesng component. The expense recognized for these awards is based on the grant date fair value
of the Company’s common stock mulplied by the number of units granted and recognized over me based on the probability of meeng such commercial,
regulatory and corporate milestones. The Company did not grant any PSUs under the 2023 Plan or the 2014 Plan during the year ended December 31, 2023.
The Company granted 400,000 PSUs during the year ended December 31, 2022.

RSU and PSU acvity is as follows:

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Unvested as of December 31, 2022
Granted
Vested
Forfeited and canceled

Unvested as of December 31, 2023

2014 Plan

2023 Plan

Number of Shares

Weighted Average
Grant Date Fair Value

Number of Shares

Weighted Average
Grant Date Fair Value

5,674,406 
2,759,675 
(4,047,676)
(1,046,536)
3,339,869 

$2.10
$0.68
$2.06
$1.06
$1.30

— 
603,400 
— 
— 
603,400 

$—
$1.48
$—
$—
$1.48

The total fair value of RSUs and PSUs that vested during 2023 and 2022 (measured on the date of vesng) was $8.4 million and $11.2 million, respecvely. As
of  December  31,  2023,  there  was  approximately  $3.0  million  of  unrecognized  compensaon  cost  related  to  RSUs  and  PSUs,  which  is  expected  to  be
recognized over a weighted average period of 1.65 years.

Employee Stock Purchase Plan

On  June  6,  2019,  the  Company’s  stockholders  approved  the  Amended  and  Restated  2014  Employee  Stock  Purchase  Plan,  or  ESPP.  Under  the  ESPP
substanally all employees may voluntarily enroll to purchase shares of the Company’s common stock through payroll deducons at a price equal to 85% of
the lower of the fair market values of the stock as of the beginning or the end of the six-month offering period. An employee's payroll deducons under the
ESPP are limited to 15% of the employee's compensaon, and an employee may not purchase more than $25,000 worth of stock during any calendar year. In
addion, an employee may not purchase more than 1,500 shares in any six-month offering period. As of December 31, 2023 and 2022, a total of 4,637,801
and 4,837,995 shares of the Company's common stock were available for future issuance under the ESPP, respecvely. The Company issued 200,194 shares
during the year ended December 31, 2023.

Stock-Based Compensaon Expense

The Black-Scholes opon pricing model is used to esmate the fair value of the common stock opons. The weighted-average assumpons used in calculang
the fair values of the rights to acquire stock under the 2023 Plan, the 2014 Plan and inducement awards were as follows:

Common Stock Opons
Risk-free interest rate
Expected volality
Expected term (years)
Expected dividend yield
Weighted average grant date fair value

3.54%
100.97%
5.51

2023
-
-
-
—%
$0.69

Years ended December 31,

4.81%
111.71%
6.25

1.69%
79.77%
5.51

4.17%
91.57%
6.25

2022
-
-
-
—%
$1.27

The Company has classified stock-based compensaon in its consolidated statements of operaons and comprehensive loss as follows (in thousands):

Cost of goods sold
Research and development
Selling, general and administrave
Restructuring
Total

Years ended December 31,

2023

2022

267  $

1,964 
6,456 
630 
9,317  $

448 
3,378 
10,826 
3,197 
17,849 

$

$

Stock-based compensaon by type of award was as follows (in thousands):

Akebia Therapeucs, Inc. | Form 10-K | Page 162

 
 
 
 
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Stock opons
Restricted stock units
Performance RSUs
Employee stock purchase plan
Total

 Employee Rerement Plan

Years ended December 31,

2023

2022

5,310  $
3,637 
297 
73 
9,317  $

8,968 
8,619 
116 
146 
17,849 

$

$

In 2008, the Company established a rerement plan, or the Plan, authorized by Secon 401(k) of the Internal Revenue Code, or IRC. In accordance with the
Plan,  all  employees  who  have  aained  the  age  of  21  are  eligible  to  parcipate  in  the  Plan  as  of  the  first  Entry  Date,  as  defined,  following  their  date  of
employment. Each employee can contribute a percentage of compensaon up to a maximum of the statutory limits per year. Company contribuons are
discreonary and contribuons in the amount of approximately $1.7 million and $2.6 million were made during the years ended December 31, 2023 and
2022, respecvely.

15. INCOME TAXES

The Company’s income tax provision was computed based on the federal statutory rate and the state statutory rates, net of the related federal benefit. There
was no current or deferred income tax expense or benefit for the years ended December 31, 2023 and 2022 due to the Company’s net losses and increases in
its valuaon allowance against its deferred tax assets.

The Company's effecve income tax rate differs from the statutory federal income tax rate as follows for the years ended December 31, 2023 and 2022:

Federal tax at statutory rate
State and local tax at statutory rate
Research and development tax credits
Change in valuaon allowance
Other permanent differences
Stock opon cancellaons
Stock opon shoralls
Effect of rate changes
Provision to return adjustment
Other
Effecve tax rate

Years Ended December 31,

2023

2022

21.0 %
2.7 
0.3 
(9.1)
(2.0)
(3.7)
(1.7)
(7.7)
(0.3)
0.5 
— %

21.0 %
2.5 
— 
(19.3)
(1.0)
(2.5)
(1.6)
0.6 
0.3 
— 
— %

Deferred  income  taxes  reflect  the  net  tax  effects  of  temporary  differences  between  the  carrying  amounts  of  assets  and  liabilies  for  financial  reporng
purposes and the amounts used for income tax purposes. When realizaon of the deferred tax asset is more likely than not to occur, the benefit related to the
deducble temporary differences aributable to operaons is recognized as a reducon of income tax expense. A valuaon allowance is recorded against
deferred tax assets if it is more likely than not that some or all of the deferred tax assets will not be realized. The Company cannot be certain that future
taxable  income  will  be  sufficient  to  realize  its  deferred  tax  assets.  Accordingly,  the  Company  has  recorded  a  valuaon  allowance  against  the  Company’s
otherwise  recognizable  net  deferred  tax  assets.  The  Company  connues  to  maintain  the  underlying  tax  benefits  to  offset  future  taxable  income  and  to
monitor  the  need  for  a  valuaon  allowance  based  on  the  profitability  of  its  future  operaons.  The  valuaon  allowance  increased  by  approximately  $4.7
million and $18.2 million during the years ended December 31, 2023 and 2022, respecvely. Significant components of the Company’s deferred tax assets and
liabilies are as follows (in thousands):

Akebia Therapeucs, Inc. | Form 10-K | Page 163

 
 
 
 
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Deferred tax assets:

Accrued expenses and other current liabilies
Deferred revenue
Sale of royalty
Stock-based compensaon
R&D credits
Capitalized R&D costs
Other non-current liabilies
Net operang loss carryforward
ASC 842 lease liability
Inventories reserve
Return reserve
Refund liability
Other

Total deferred tax assets

Less valuaon allowance

Total deferred tax assets, net of valuaon allowance

Deferred tax liabilies:
Intangible assets
481(a) adjustments
ROU asset (ASC 842)
Other

Total deferred tax liabilies

Net deferred tax liability

December 31,

2023

2022

$

1,411  $
9,534 
12,346 
6,183 
4,843 
18,295 
3,434 
288,939 
2,959 
4,537 
1,624 
8,829 
14,036 
376,970 
(365,330)
11,640 

(6,868)
(1,924)
(2,734)
(114)
(11,640)

$

—  $

2,924 
1,250 
13,291 
8,317 
4,827 
13,825 
2,754 
288,842 
8,032 
17,411 
— 
9,478 
13,159 
384,110 
(360,621)
23,489 

(15,981)
— 
(7,426)
(82)
(23,489)
— 

At December 31, 2023 and 2022, the Company had no start-up expenses capitalized for income tax purposes (aer amorzaon of $1.9 million) and $0.1
million of start-up expenses capitalized for income tax purposes (aer amorzaon of $1.7 million), respecvely, with amorzaon available to offset future
federal, state and local income tax.

As of December 31, 2023 and 2022, the Company had approximately $1,230.4 million and $1,230.7 million, respecvely, of federal net operang losses, or
NOLs,  carry-forwards  which  expire  through  2037.  Included  in  the  $1,230.4  million  of  federal  NOLs  are  losses  of  $648.3  million  that  will  carry  forward
indefinitely  as  a  result  of  the  Tax  Cuts  and  Jobs  Act.  Addionally,  at  December  31,  2023  and  2022,  the  Company  had  approximately  $1,807.8  million  and
$1,808.5 million, respecvely, of state NOL carry-forwards, which expire through 2043. The Company also has approximately $2.7 million of federal research
and development tax credit carryforwards which expire through 2040 and $2.7 million of state R&D tax credit carryforwards which expire through 2036.

Under the provisions of the IRC, the NOLs and tax credit carry-forwards are subject to review and possible adjustment by the Internal Revenue Service and
state tax authories. NOLs and tax credit carryforwards may become subject to an annual limitaon under IRC Secons 382 and 383 if there is more than a
50% change in ownership of the stockholders that own 5% or more of the Company’s outstanding stock over a three-year period. The Company completed an
evaluaon of its ownership changes and concluded that an ownership change did occur on December 12, 2018 for both Akebia and Keryx in connecon with
the  Merger.  As  a  consequence  of  this  ownership  change,  the  Company’s  NOLs  and  tax  credit  carryforwards  allocable  to  the  tax  periods  preceding  the
ownership change became subject to limitaon under Secon 382 of the IRC. The Company reduced its associated deferred tax assets by $44.9 million as a
result of the limitaon. The Company completed an evaluaon of its ownership changes as of March 31, 2022 and concluded that an ownership change had
not  occur  since  the  previous  evaluaon  done  through  December  12,  2018.  The  Company  may  experience  ownership  changes  in  the  future  as  a  result  of
subsequent shis in our stock ownership, some of which may be outside the Company’s control. As a result, the Company’s ability to ulize these aributes
to offset taxable income may be subject to limitaons.

The Company has not conducted a full study of it’s research and development credit carryforwards. A study may result in an adjustment to the Company’s
research  and  development  credit  carryforwards;  however,  unl  a  study  is  completed,  and  any  adjustment  is  known,  no  amounts  will  be  presented  as  an
uncertain tax posion. A full valuaon allowance has been provided

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against the Company’s research and development credit carryforwards and, if an adjustment is required, this adjustment would be offset by an adjustment to
the valuaon allowance. Thus, there would be no impact to the balance sheet or statement of operaons at this me, if an adjustment were required.

The Company files income tax returns in the U.S. federal and various state and local jurisdicons. For federal and state income tax purposes, the 2022, 2021
and 2020 tax years remain open for examinaon under the normal three-year statute of limitaons. The statute of limitaons for income tax audits in the U.S.
will commence upon ulizaon of NOLs and will expire three years from the filing of the tax return the loss was ulized on.

A  reconciliaon  of  the  beginning  and  ending  amounts  of  unrecognized  tax  benefits  for  the  years  ending  December  31,  2023  and  2022  are  as  follows  (in
thousands):

Balance at December 31, 2021

Addions based on tax posions of current years

Balance at December 31, 2022

Reducons based on tax posions of current years

Balance at December 31, 2023

$

$

2,513 
184 
2,697 
(2,697)
— 

The Company does not believe there will be a material change in its unrecognized tax posions over the next twelve months. All of the unrecognized tax
benefits, if recognized, would be offset by the valuaon allowance.

16. NET LOSS PER SHARE

Potenally diluve securies, common stock opons, RSUs and SARs have been excluded from the calculaon of diluted net loss per share as their effects
would be an-diluve. For periods in which the Company reports a net loss, the weighted average number of shares outstanding used to calculate both basic
and diluted net loss per share were the same. The shares in the table below were excluded from the calculaon of diluted net loss per share, prior to the use
of the treasury stock method, due to their an-diluve effect:                                        

Outstanding common stock opons
Unvested restricted stock units
Stock appreciaon rights

Total

17. RESTRUCTURING

Years Ended December 31,
2022
2023
11,726,090 
12,690,624 
5,681,137 
3,930,167 
— 
635,313 
17,407,227 
17,256,104 

On April 4, 2022, the Company restructured its operaons and executed a Board approved reducon of workforce by approximately 42% across all areas of
the  Company  (47%  inclusive  of  the  closing  of  the  majority  of  open  posions)  following  the  receipt  of  the  CRL  from  the  FDA  to  the  Company’s  NDA  for
vadadustat for the treatment of anemia due to CKD in adult paents. On May 5, 2022, the Company laid off several members of management. As a result of
the restructuring, during the year ended December 31, 2022, the Company recognized $14.5 million of restructuring charges in the consolidated statement of
operaons and comprehensive loss, including $11.3 million of one-me terminaon benefits and contractual terminaon benefits for severance, healthcare
and related benefits and $3.2 million of non-cash stock-based compensaon expense.

On November 7, 2022, the Company further reduced its workforce by approximately 14% of the then current headcount primarily focused on the commercial
organizaon as a result of the Company’s decision to shi to a strategic account management focused model for its commercial efforts. This shi in approach
supported the Company’s strategic pillars to drive Auryxia revenue while also connuing to decrease operang costs. During the year ended December 31,
2022, the Company recognized $1.4 million of restructuring charges in the consolidated statement of operaons and comprehensive loss, including one-me
terminaon benefits and contractual terminaon benefits for severance, healthcare and related benefits and non-cash stock-based compensaon expense.

The workforce reducons were completed as of December 31, 2022, and the Company has incurred all related charges.

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The following table is a reconciliaon of the beginning and ending restructuring liability for the year ended December 31, 2023 and 2022 respecvely (in
thousands): 

Beginning balance
Restructuring accrual and adjustments
Cash payments

Ending balance

December 31,

2023

2022

3,758  $
(521)
(2,230)
1,007  $

— 
12,735 
(8,977)
3,758 

$

$

As of December 31, 2023, $0.7 million and $0.3 million of the accrued severance, benefits and associated costs are reflected in accrued expenses and other
current liabilies and other non-current liabilies, respecvely. As of December 31, 2022, $2.8 million and $1.0 million of the accrued severance, benefits and
associated costs are reflected in accrued expenses and other current liabilies and other non-current liabilies, respecvely.

18. SUBSEQUENT EVENTS

The  Company  has  evaluated  events  and  transacons  occurring  aer  the  balance  sheet  date  through  the  date  of  the  Company's  consolidated  financial
statements were issued and concluded that there were no events or transacons occurring during this period that required recognion or disclosure in the
Company's  consolidated  financial  statements,  except  for  maers  described  in  Note  7,  Indebtedness,  related  to  the  entering  into  the  BlackRock  Credit
Agreement and the terminaon of the Pharmakon Term Loans and Note 13, Capital Stock, related to warrants issued in connecon with the BlackRock Credit
Agreement and the offerings under the At-the-Market facility.

Item 9. Changes in and Disagreements with Accountants on Accounng and Financial Disclosure

None.

Item 9A. Controls and Procedures

Management’s Evaluaon of our Disclosure Controls and Procedures

“Disclosure controls and procedures”, as defined in Rules 13a-15(e) and 15d-15(e) under the Securies Exchange Act of 1934, as amended, or the Exchange
Act, are controls and other procedures that are designed to ensure that informaon required to be disclosed in our reports filed or submied under the
Exchange Act is recorded, processed, summarized and reported within the me periods specified in the U.S. Securies and Exchange Commission, or the SEC,
rules and forms. Disclosure controls and procedures include, without limitaon, controls and procedures designed to ensure that informaon required to be
disclosed  in  company  reports  filed  or  submied  under  the  Exchange  Act  is  accumulated  and  communicated  to  our  management,  including  our  principal
execuve and principal financial officers, as appropriate to allow mely decisions regarding required disclosure.

As  required  by  Rules  13a-15  and  15d-15  under  the  Exchange  Act,  our  management,  with  the  parcipaon  of  our  principal  execuve  officer  and  principal
financial officer, carried out an evaluaon of our disclosure controls and procedures as of December 31, 2023. Based upon their evaluaon, our principal
execuve officer and principal financial officer concluded that as of December 31, 2023, our disclosure controls and procedures were not effecve because of
a material weakness in the design of our internal control over financial reporng related to our accounng for inventories and inventory related transacons
which is described in more detail below.

Management’s Annual Report on Internal Control Over Financial Reporng

Our  management,  with  the  parcipaon  of  our  principal  execuve  officer  and  principal  financial  officer,  is  responsible  for  establishing  and  maintaining
adequate internal control over financial reporng. Internal control over financial reporng is defined in Rule 13a-15(f) or 15d-15(f) promulgated under the
Exchange Act as a process designed by, or under the supervision of, our principal execuve officer and principal financial officer and effected by our board of
directors,  management  and  other  personnel  to  provide  reasonable  assurance  regarding  the  reliability  of  our  financial  reporng  and  the  preparaon  of
financial statements for external purposes in accordance with accounng principles generally accepted in the United States of America.

Our management conducted the assessment of the effecveness of our internal control over financial reporng as of December 31, 2023, based on criteria
established  in  Internal  Control—  Integrated  Framework  issued  by  the  Commiee  of  Sponsoring  Organizaons  of  the  Treadway  Commission  in  2013.  As  a
result of this assessment, our management has concluded that, as of December 31, 2023, our internal control over financial reporng was ineffecve due to
the material weakness described below.

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Material Weakness - Inventories

As  of  December  31,  2023,  our  management  concluded  that  we  did  not  design  and  maintain  effecve  controls  over  the  completeness  and  accuracy  of
accounng for inventory and inventory related transacons, including inventory reconciliaons, calculaon of overheads, presentaon of inventories in our
balance sheet between short-term and long-term and our liabilies related to the calculaon of firm purchase commitment liability. A material weakness is a
deficiency, or combinaon of deficiencies, in internal control over financial reporng, such that there is a reasonable possibility that a material misstatement
of  a  company’s  annual  or  interim  consolidated  financial  statements  will  not  be  prevented  or  detected  on  a  mely  basis.  Specifically,  we  did  not  maintain
effecve controls related to (i) the review of inventory reconciliaons, (ii) the validaon of the inventory cosng, (iii) the classificaon of inventory within the
balance  sheet  and  cost  of  product  and  other  revenue  related  costs  in  the  statement  of  operaons,  (iv)  the  calculaon  of  esmated  excess  firm  purchase
commitment liability and (v) the verificaon that the existence of all inventories subject to physical inventory counts were accurately counted.

Remediaon Efforts of the Material Weakness - Inventories

The control deficiencies described above resulted in certain accounng errors, including in our internal preliminary consolidated financial statements for the
year ended December 31, 2023, that were corrected prior to the issuance of such annual consolidated financial statements.

Our  management  has  taken,  plans  to  connue  to  take,  acons  to  remediate  the  deficiency  in  our  internal  control  over  financial  reporng  and  has
implemented new processes, procedures and controls designed to address the underlying causes associated with the material weakness.

For example, we are in the process of:

(i) implemenng and documenng new processes and controls to help ensure the completeness and accuracy of our inventory reconciliaons,

(ii) engaging addional third-party subject maer experts and accounng personnel with U.S. GAAP experience specific to inventory accounng,

(iii) enhancing the accuracy of key reports used to calculate the firm purchase commitment liability; and

(iv) establishing effecve monitoring and oversight controls to help to ensure the completeness and accuracy of inventory included in our financial
statements and related disclosures.

These control deficiencies did not have any material impact on our current or prior period consolidated annual or interim financial statements, but could have
resulted  in  material  misstatements  of  our  annual  or  interim  financial  statements  that  would  not  have  been  prevented  or  detected  on  a  mely  basis.
Accordingly,  our  management  has  concluded  that  the  control  deficiencies  were  a  material  weakness  in  the  Company’s  internal  control  over  financial
reporng.

As management connues to evaluate and work to improve our internal control over financial reporng, management may determine it is necessary to take
addional measures to address the material weakness. Unl the controls have been operang for a sufficient period of me and management has concluded,
through tesng, that these controls are operang effecvely, the material weakness described above will connue to exist.

Remediaon of Previously Idenfied Material Weakness - Product Return Reserves

As  disclosed  in  our  2022  Annual  Report  on  Form  10-K/A,  our  management  idenfied  a  material  weakness  in  our  internal  control  over  financial  reporng
relang to product return reserves. Management is commied to maintaining a strong internal control environment. In response to the material weakness
previously  idenfied,  management,  with  the  oversight  of  the  Audit  Commiee  of  the  Board  of  Directors,  took  comprehensive  acons  to  remediate  the
material  weakness  in  internal  control  over  financial  reporng  relang  to  our  product  return  reserves,  including;  (i)  designed  controls  to  address  the
completeness and accuracy of key reports ulized in the execuon of internal controls related product return reserve calculaons, (ii) engaged addional
third party subject maer experts with U.S. GAAP experience specific to product returns accounng and (iii) established effecve monitoring and oversight
controls to help to ensure the completeness and accuracy of our accrued product returns included in our financial statements and related disclosures as well
as connued to engage an outside firm to assist management with performing sufficient tesng throughout the year to validate the operang effecveness of
certain  controls  over  financial  reporng.  These  remediaon  efforts  also  enhanced  our  overall  financial  reporng  control  environment  related  to  product
return  reserves.  As  of  December  31,  2023,  we  determined  that  our  previously  reported  material  weakness  related  to  product  return  reserves  has  been
remediated.

Akebia Therapeucs, Inc. | Form 10-K | Page 167

Table of Contents

Changes in Internal Control over Financial Reporng

Except  for  the  remediaon  efforts  as  noted  “—Remediaon  Efforts  of  the  Material  Weakness  –  Inventory”  and  “—Remediaon  of  Previously  Idenfied
Material Weakness – Returns” above, there have been no changes in our internal control over financial reporng during the year ended December 31, 2023,
as defined in Rules 13a-15(f) and 15(d)-15(f) promulgated under the Exchange Act, that have materially affected, or are reasonably likely to materially affect,
our internal control over financial reporng.

Limitaons of Effecveness of Controls and Procedures

In designing and evaluang our disclosure controls and procedures, management recognizes that any controls and procedures, no maer how well designed
and operated, can provide only reasonable assurance of achieving their objecves and management necessarily applies its judgment in evaluang the cost-
benefit relaonship of possible controls and procedures.

Report of Independent Registered Public Accounng Firm

To the Stockholders and the Board of Directors of Akebia Therapeucs, Inc.

Opinion on Internal Control Over Financial Reporng

We have audited Akebia Therapeucs, Inc.’s internal control over financial reporng as of December 31, 2023, based on criteria established in Internal Control
—Integrated Framework issued by the Commiee of Sponsoring Organizaons of the Treadway Commission (2013 framework) (the COSO criteria). In our
opinion, because of the effect of the material weakness described below on the achievement of the objecves of the control criteria, Akebia Therapeucs,
Inc. (the “Company”) has not maintained effecve internal control over financial reporng as of December 31, 2023, based on the COSO criteria.

A material weakness is a deficiency, or combinaon of deficiencies, in internal control over financial reporng, such that there is a reasonable possibility that
a material misstatement of the company’s annual or interim financial statements will not be prevented or detected on a mely basis. The following material
weakness  has  been  idenfied  and  included  in  management’s  assessment.  Management  has  idenfied  a  material  weakness  in  controls  related  to  the
Company’s inventory process.

We also have audited, in accordance with the standards of the Public Company Accounng Oversight Board (United States) (PCAOB), the consolidated balance
sheets of the Company as of December 31, 2023 and 2022, the related consolidated statements of operaons and comprehensive loss, stockholders’ (deficit)
equity and cash flows for each of the two years in the period ended December 31, 2023, and the related notes. This material weakness was considered in
determining the nature, ming and extent of audit tests applied in our audit of the 2023 consolidated financial statements, and this report does not affect our
report dated March 14, 2024, which expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effecve internal control over financial reporng and for its assessment of the effecveness of
internal  control  over  financial  reporng  included  in  the  accompanying  Management’s  Annual  Report  on  Internal  Control  over  Financial  Reporng.  Our
responsibility  is  to  express  an  opinion  on  the  Company’s  internal  control  over  financial  reporng  based  on  our  audit.  We  are  a  public  accounng  firm
registered  with  the  PCAOB  and  are  required  to  be  independent  with  respect  to  the  Company  in  accordance  with  the  U.S.  federal  securies  laws  and  the
applicable rules and regulaons of the Securies and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether effecve internal control over financial reporng was maintained in all material respects.

Our  audit  included  obtaining  an  understanding  of  internal  control  over  financial  reporng,  assessing  the  risk  that  a  material  weakness  exists,  tesng  and
evaluang the design and operang effecveness of internal control based on the assessed risk, and performing such other procedures as we considered
necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definion and Limitaons of Internal Control Over Financial Reporng

A company’s internal control over financial reporng is a process designed to provide reasonable assurance regarding the reliability of financial reporng and
the preparaon of financial statements for external purposes in accordance with generally accepted accounng principles. A company’s internal control over
financial reporng includes those policies and procedures

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Table of Contents

that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transacons and disposions of the assets of the
company;  (2)  provide  reasonable  assurance  that  transacons  are  recorded  as  necessary  to  permit  preparaon  of  financial  statements  in  accordance  with
generally  accepted  accounng  principles,  and  that  receipts  and  expenditures  of  the  company  are  being  made  only  in  accordance  with  authorizaons  of
management and directors of the company; and (3) provide reasonable assurance regarding prevenon or mely detecon of unauthorized acquision, use,
or disposion of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitaons, internal control over financial reporng may not prevent or detect misstatements. Also, projecons of any evaluaon of
effecveness  to  future  periods  are  subject  to  the  risk  that  controls  may  become  inadequate  because  of  changes  in  condions,  or  that  the  degree  of
compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Boston, Massachuses
March 14, 2024

Item 9B. Other Informaon

Rule 10b5-1 - Director and Officer Trading Arrangements

From me to me, the Company's directors and officers (as defined in Rule 16a-1(f) under the Securies Exchange Act of 1934, as amended, or the Exchange
Act, engage in open-market transacons with respect to Company securies, including to sasfy tax withholding obligaons when equity awards vest or are
exercised, and for diversificaon or other personal reasons.

Transacons in Company securies by directors and officers are required to be made in accordance with the Company’s insider trading policy, which requires
that the transacons be in accordance with applicable U.S. federal securies laws that prohibit trading while in possession of material nonpublic informaon.
Rule  10b5-1  under  the  Exchange  Act  provides  an  affirmave  defense  that  enables  directors  and  officers  to  prearrange  transacons  in  the  Company’s
securies in a manner that avoids concerns about iniang transacons while in possession of material nonpublic informaon.

The following table describes, for the fourth quarter of 2023, each trading arrangement for the sale or purchase of Company securies adopted or terminated
by our directors and officers that is either (1) a contract, instrucon or wrien plan intended to sasfy the affirmave defense condions of Rule 10b5-1(c) (a
“Rule 10b5-1 trading arrangement”) or (2) a “non-Rule 10b5-1 trading arrangement” (as defined in Item 408(c) of Regulaon S-K):

Name (Title)

John P. Butler
(President and
Chief Execuve
Officer)
Ellen Snow (Senior
Vice President,
Chief Financial
Officer and
Treasurer)

Steven K. Burke,
M.D. (Senior Vice
President, Research
& Development and
Chief Medical
Officer)

Acon Taken (Date
of Acon)

December 1, 2023

November 20, 2023

November 17, 2023

Type of Trading Arrangement

Durable Rule 10b5-1 trading
arrangement for sell-to-cover
transacons relang to all equity
awards that have or may be granted
Durable Rule 10b5-1 trading
arrangement for sell-to-cover
transacons relang to all equity
awards that have or may be granted

Durable Rule 10b5-1 trading
arrangement for sell-to-cover
transacons relang to all equity
awards that have or may be granted

Nature of Trading
Arrangement

Duraon of Trading
Arrangement

Aggregate Number of
Securies

Sale

Sale

Sale

Unl final selement of
any RSUs

Indeterminable

 (1)

Unl final selement of
any RSUs

Indeterminable

 (1)

Unl final selement of
any RSUs

Indeterminable

 (1)

Akebia Therapeucs, Inc. | Form 10-K | Page 169

Table of Contents

Michel Dahan
(Senior Vice
President, Chief
Operang Officer)
Nicole R. Hadas
(Senior Vice
President, Chief
Legal Officer and
Corporate
Secretary)

December 3, 2023

November 14, 2023

Durable Rule 10b5-1 trading
arrangement for sell-to-cover
transacons relang to all equity
awards that have or may be granted
Durable Rule 10b5-1 trading
arrangement for sell-to-cover
transacons relang to all equity
awards that have or may be granted

Sale

Sale

Unl final selement of
any RSUs

Indeterminable

 (1)

Unl final selement of
any RSUs

Indeterminable

 (1)

(1) The number of shares subject to RSUs that will be sold to sasfy applicable tax withholding obligaons upon vesng is unknown as the number will vary
based on the extent to which vesng condions are sasfied, the market price of the Company’s common stock at the me of selement and the potenal
future grant of addional RSUs subject to this arrangement. This trading arrangement, which applies to RSUs whether vesng is based on the passage of me
and/or the achievement of performance goals, provides for the automac sale of shares that would otherwise be issuable on each selement date of a RSU
in  an  amount  sufficient  to  sasfy  the  applicable  tax  withholding  obligaon,  with  the  proceeds  of  the  sale  delivered  to  the  Company  in  sasfacon  of  the
applicable tax withholding obligaon.

Item 9C. Disclosure Regarding Foreign Jurisdicons that Prevent Inspecons

Not applicable.

Item 10. Director, Execuve Officers and Corporate Governance

PART III 

The informaon required by this Item 10 will be included in our Definive Proxy Statement to be filed with the Securies and Exchange Commission, or SEC,
with respect to our 2024 Annual Meeng of Stockholders and is incorporated herein by reference.

Item 11. Execuve Compensaon

The informaon required by this Item 11 will be included in our Definive Proxy Statement to be filed with the SEC with respect to our 2024 Annual Meeng
of Stockholders and, other than the informaon required by Item 402(v) of Regulaon S-K, is incorporated herein by reference.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Maers

The informaon required by this Item 12 will be included in our Definive Proxy Statement to be filed with the SEC with respect to our 2024 Annual Meeng
of Stockholders and is incorporated herein by reference.

Item 13. Certain Relaonships and Related Transacons, and Director Independence

The informaon required by this Item 13 will be included in our Definive Proxy Statement to be filed with the SEC with respect to our 2024 Annual Meeng
of Stockholders and is incorporated herein by reference.

Item 14. Principal Accountant Fees and Services

The informaon required by this Item 14 will be included in our Definive Proxy Statement to be filed with the SEC with respect to our 2024 Annual Meeng
of Stockholders and is incorporated herein by reference.

Akebia Therapeucs, Inc. | Form 10-K | Page 170

Table of Contents

PART IV

Item 15. Exhibits and Financial Statement Schedules

(a) Documents filed as part of this Annual Report on Form 10-K.

(b) Consolidated Financial Statements

Report of Independent Registered Public Accounng Firm

Consolidated Balance Sheets

Consolidated Statements of Operaons and Comprehensive Loss

Consolidated Statements of Stockholders’ (Deficit) Equity

Consolidated Statements of Cash Flows

Notes to Consolidated Financial Statements

(2) Schedules

Schedules have been omied as all required informaon has been disclosed in the consolidated financial statements and related footnotes.

(3) Exhibits

The Exhibits listed below are filed as part of this Annual Report on Form 10-K.

Akebia Therapeucs, Inc. | Form 10-K | Page 171

 
Table of Contents

Exhibit
Number

2.1**

2.2

3.1

3.2

3.3

4.1

4.2

4.3#

4.4#

4.5!

4.6

4.7*

10.1†

10.2

10.3

10.4

Incorporated by Reference

Schedule/
Form

File No.

Exhibit

Filed Date/ Period End
Date

8-K

001-36352

2.1

June 28, 2018

Descripon of Exhibit

Agreement and Plan of Merger, dated as of June 28, 2018, by and among
Akebia Therapeucs, Inc., Alpha Therapeucs Merger Sub, Inc., and
Keryx Biopharmaceucals, Inc.

First Amendment to Agreement and Plan of Merger, dated as of October
1, 2018, by and among Akebia Therapeucs, Inc., Alpha Therapeucs
Merger Sub, Inc. and Keryx Biopharmaceucals, Inc.

Ninth Amended and Restated Cerficate of Incorporaon

Cerficate of Amendment of Ninth Amended and Restated Cerficate of
Incorporaon of Akebia Therapeucs, Inc.

Second Amended and Restated Bylaws of Akebia Therapeucs, Inc.

8-K

8-K

8-K

8-K

001-36352

001-36352

001-36352

001-36352

Form of Common Stock Cerficate

S-1/A

333-193969

Fourth Amended and Restated Investors’ Rights Agreement, dated March
5, 2014

10-K

001-36352

Amendment No. 1 to Fourth Amended and Restated Investors’ Rights
Agreement, dated June 28, 2017

10-K

001-36352

Investment Agreement between Akebia Therapeucs, Inc. and Vifor
(Internaonal) Ltd., dated May 12, 2017

10-Q

001-36352

Investment Agreement between Akebia Therapeucs, Inc. and Vifor
(Internaonal) Ltd., dated February 18, 2022

10-K

001-36352

Descripon of Registrant’s Securies

10-K

001-36352

Form of Warrant

2.1

3.1

3.1

3.1

4.1

4.4

4.5

4.1

4.5

4.6

October 1, 2018

March 28, 2014

June 9, 2020

April 28, 2023

March 4, 2014

March 4, 2015

March 12, 2018

August 8, 2017

March 1, 2022

February 25, 2021

Form of Director and Officer Indemnificaon Agreement

10-K

001-36352

10.1

March 12, 2018

Office Lease Agreement Between MA-Riverview/245 First Street, L.L.C.
and Akebia Therapeucs, Inc., dated December 3, 2013

S-1

333-193969

10.2

February 14, 2014

First Amendment to Office Lease Agreement Between Jamestown
Premier 245 First, LLC and Akebia Therapeucs, Inc., dated December 15,
2014

Second Amendment to Office Lease Agreement Between Jamestown
Premier 245 First, LLC and Akebia Therapeucs, Inc., dated November 23,
2015

10-K

001-36352

10.3

March 4, 2015

10-K

001-36352

10.4

March 14, 2016

Akebia Therapeucs, Inc. | Form 10-K | Page 172

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number
10.5

Descripon of Exhibit
Third Amendment to Office Lease Agreement Between Jamestown
Premier 245 First, LLC and Akebia Therapeucs, Inc., dated July 25, 2016

Incorporated by Reference

Schedule/
Form

File No.

10-Q

001-36352

Exhibit

10.1

Filed Date/ Period End
Date

November 9, 2016

10.6

10.7

10.8

10.9

10.10

10.11

10.12

10.13†

10.14†

10.15†

10.16†

10.17†

10.18†

10.19†

10.20†

Fourth Amendment to Office Lease Agreement Between CLPF-Cambridge
Science Center, LLC and Akebia Therapeucs, Inc., dated May 1, 2017

10-K

001-36352

10.6

March 12, 2018

Fih Amendment to Office Lease Agreement Between CLPF-Cambridge
Science Center, LLC and Akebia Therapeucs, Inc. dated April 9, 2018

10-Q

001-36352

10.1

August 8, 2018

Sixth Amendment to Office Lease Agreement Between CLPF-Cambridge
Science Center, LLC and Akebia Therapeucs, Inc. dated November 30,
2020

One Marina Park Drive Office Lease dated April 29, 2015, by and
between Keryx Biopharmaceucals, Inc. and Fallon Cornerstone One
MPD LLC

First Amendment to One Marina Park Drive Office Lease, dated February
24, 2022, by and between Keryx Biopharmaceucals, Inc. and CLPF One
Marina Park Drive LLC (successor-in-interest to Fallon Cornerstone One
MPD LLC)

Assignment and Assumpon Agreement, dated February 24, 2022, by
and between Keryx Biopharmaceucals, Inc. and Akebia Therapeucs,
Inc.

10-K

001-36352

10.8

February 25, 2021

10-K

000-30929

10.29

March 1, 2017

10-K

001-36352

10.10

March 1, 2022

10-K

001-36352

10.11

March 1, 2022

Sublease, dated as of September 9, 2019, by and between Keryx
Biopharmaceucals, Inc. and Foundaon Medicine, Inc.

10-Q

001-36352

10.1

November 12, 2019

Amended and Restated 2008 Equity Incenve Plan

Amendment No. 1 to Amended and Restated 2008 Equity Incenve Plan

Execuve Employment Agreement with John P. Butler, dated September
16, 2013

S-1

S-1

S-1

333-193969

333-193969

10.5

10.6

February 14, 2014

February 14, 2014

333-193969

10.7

February 14, 2014

Offer Leer to David Spellman, dated as of June 13, 2020

10-Q

001-36352

10.1

August 10, 2020

Form of Non-Statutory Stock Opon Agreement for Officers

S-1/A

333-193969

10.24

March 4, 2014

Form of Non-Statutory Stock Opon Agreement for Non-Employee
Directors

S-1/A

333-193969

10.25

March 4, 2014

Amended and Restated Non-Employee Director Compensaon Program,
effecve April 27, 2023

10-Q

001-36352

10.1

May 8, 2023

Second Amended and Restated Non-Employee Director Compensaon
Program, effecve June 6, 2023

10-Q

001-36352

10.8

August 28, 2023

Akebia Therapeucs, Inc. | Form 10-K | Page 173

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number

10.21†*

10.22†

10.23†

10.24†

10.25†

Descripon of Exhibit
Third Amended and Restated Non-Employee Director Compensaon
Program, effecve January 1, 2024

Incorporated by Reference

Schedule/
Form

File No.

Exhibit

Filed Date/ Period End
Date

Form of Execuve Severance Agreement for Officers

S-1/A

333-193969

10.27

March 4, 2014

2014 Incenve Plan

Amendment No. 1 to the Akebia Therapeucs, Inc. 2014 Incenve Plan

S-1

S-8

333-193969

10.29

March 4, 2014

333-229366

4.4

January 25, 2019

Amended and Restated 2014 Employee Stock Purchase Plan

DEF 14A

001-36352

Appendix A

April 26, 2019

10.26†

Amended and Restated Cash Incenve Plan, effecve January 19, 2022

10-K

001-36352

10.28

March 1, 2022

10.27†

10.28†

10.29†

10.30†

10.31†

10.32†

10.33†

10.34†

Form of Officer Restricted Stock Unit Award Agreement under 2014
Incenve Plan

10-K

001-36352

10.18

March 12, 2018

Form of Officer Restricted Stock Unit Award Agreement under 2014
Incenve Plan

10-K

001-36352

10.29

March 26, 2019

Form of Officer Inducement Award Non-Statutory Stock Opon
Agreement

Form of Inducement Award Non-Statutory Stock Opon Agreement for
Non-Officers

S-8

S-8

333-222728

333-222728

4.4

4.5

January 26, 2018

January 26, 2018

Form of Officer Performance-Based Stock Opon Award, under the
Company's 2014 Incenve Plan, as amended

10-Q

001-36352

10.1

November 4, 2021

Form of Officer Performance-Based Stock Restricted Stock Unit Award,
under the Company's 2014 Incenve Plan, as amended

10-Q

001-36352

10.2

November 4, 2021

Form of Officer Restricted Stock Unit Award Agreement under 2014
Incenve Plan (Retenon Awards)

10-Q

001-36352

10.6

August 4, 2022

Form of Officer Non-Statutory Stock Opon Agreement under 2014
Incenve Plan (Retenon Awards)

10-Q

001-36352

10.7

August 4, 2022

10.35†!

Form of Officer Cash Bonus Leer Agreement

10-Q

001-36352

10.3

November 4, 2021

10.36†

Form of Officer Stock Appreciaon Rights Award Agreement under 2014
Incenve Plan

10-Q

001-36352

10.3

May 8, 2023

10.37†

Akebia Therapeucs, Inc. 2023 Stock Incenve Plan

S-8

333-272453

99.1

June 6, 2023

10.38†

Form of Non-Employee Director Stock Opon Agreement under 2023
Stock Incenve Plan

10-Q

001-36352

10.10

August 28, 2023

Akebia Therapeucs, Inc. | Form 10-K | Page 174

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number

10.39†

Descripon of Exhibit

Incorporated by Reference

Schedule/
Form

File No.

Exhibit

Filed Date/ Period End
Date

Form of Non-Employee Director Restricted Stock Unit Agreement under
2023 Stock Incenve Plan

10-Q

001-36352

10.12

August 28, 2023

10.40†

Form of Officer Stock Opon Agreement under 2023 Stock Incenve Plan

10-Q

001-36352

10.11

August 28, 2023

10.41†

10.42†

10.43*†

10.44*†

10.45*†

10.46*†

10.47*†

10.48†

10.49†

10.50†

10.51†

10.52†

10.53†

10.54†

10.55†

Form of Officer Restricted Stock Unit Agreement under 2023 Stock
Incenve Plan

10-Q

001-36352

10.13

August 28, 2023

Form of Officer Inducement Award Stock Opon Agreement under 2023
Stock Incenve Plan

10-Q

001-36352

10.14

August 28, 2023

Form of Officer Execuve Severance Agreement (Reflecng Clawback
Policy)

Form of Officer Cash Bonus Agreement (Reflecng Clawback Policy)

Form of Officer Stock Opon Agreement under 2023 Stock Incenve Plan
(Reflecng Clawback Policy)

Form of Officer Restricted Stock Unit Agreement under 2023 Stock
Incenve Plan (Reflecng Clawback Policy)

Form of Officer Inducement Award Stock Opon Agreement under 2023
Stock Incenve Plan (Reflecng Clawback Policy)

Keryx Biopharmaceucals, Inc. 1999 Stock Opon Plan

10-Q

001-30929

10.2

March 21, 2003

Keryx Biopharmaceucals, Inc. 2004 Long-Term Incenve Plan

DEF 14A

000-30929

Annex C

April 29, 2004

Amendment to the Keryx Biopharmaceucals, Inc. 2004 Long-Term
Incenve Plan dated April 11, 2006

10-Q

000-30929

10.1

August 9, 2006

Keryx Biopharmaceucals, Inc. 2007 Incenve Plan

DEF 14A

000-30929

Annex D

April 30, 2007

Keryx Biopharmaceucals, Inc. Amended and Restated 2013 Incenve
Plan

Keryx Biopharmaceucals, Inc. 2018 Equity Incenve Plan

8-K

S-8

000-30929

10.1

May 27, 2016

333-226005

99.1

June 29, 2018

Form of Indemnificaon Agreement between Keryx Biopharmaceucals,
Inc. and its Directors and Officers

10-Q

000-30929

10.1

November 9, 2016

Form of Employee Agreement (Confidenality, Non-Compeon, Non-
Solicitaon and Development Agreement) applicable to Officers

10-K

001-36352

10.56

March 26, 2019

Akebia Therapeucs, Inc. | Form 10-K | Page 175

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number
10.56†

10.57†

10.58†

Descripon of Exhibit
Keryx Biopharmaceucals, Inc. Fourth Amended and Restated Directors
Equity Compensaon Plan

Incorporated by Reference

Schedule/
Form

File No.

8-K

000-30929

Exhibit

10.2

Filed Date/ Period End
Date

May 27, 2016

Keryx Biopharmaceucals, Inc. Third Amended and Restated Directors
Equity Compensaon Plan

10-Q

000-30929

10.1

August 7, 2014

Keryx Biopharmaceucals, Inc. Director Non-Statutory Stock Opon
Award Terms and Condions under the Third Amended and Restated
Directors Equity Compensaon Plan

10-K

001-36352

10.59

March 26, 2019

10.59†

Form of Officer Retenon Leer Agreement

10-Q

001-36352

10.6

May 9, 2022

10.60†!

10.61†!

10.62†!

10.63†!

10.64†!

10.65†!

10.66*†!

10.67*†!

Form of Retenon and Separaon Agreement for Michel Dahan and
Nicole R. Hadas

10-Q

001-36352

10.7

May 9, 2022

Form of Amendment to Retenon and Separaon Agreement for Michel
Dahan and Nicole R. Hadas

10-Q

001-36352

10.2

November 3, 2022

Form of May 2023 Amendment to Retenon and Separaon Agreement
for Michel Dahan and Nicole R. Hadas

10-Q

001-36352

10.4

August 28, 2023

July 2023 Amendment to Retenon and Separaon Agreement for
Michel Dahan

10-Q

001-36352

10.5

August 28, 2023

July 2023 Amendment to Retenon and Separaon Agreement for Nicole
R. Hadas

10-Q

001-36352

10.6

August 28, 2023

October 2023 Amendment to Retenon and Separaon Agreement for
Nicole R. Hadas

10-Q

001-36352

10.3

November 8, 2023

February 2024 Amendment to Retenon and Separaon Agreement for
Nicole R. Hadas

February 2024 Amendment to Retenon and Separaon Agreement for
Michel Dahan

10.68†

Retenon Agreement with David Spellman, dated June 22, 2022

10-Q

001-36352

10.5

August 4, 2022

10.69†

10.70!

10.71#

Separaon Agreement with David Spellman, dated June 9, 2023 and
Amendment to Separaon Agreement dated July 6, 2023

10-Q

001-36352

10.7

August 28, 2023

Collaboraon Agreement between Akebia Therapeucs, Inc. and
Mitsubishi Tanabe Pharma Corporaon, dated December 11, 2015

10-K

001-36352

10.49

March 1, 2022

Leer Agreement between Akebia Therapeucs, Inc. and Mitsubishi
Tanabe Pharma Corporaon, dated September 26, 2017

10-Q

001-36352

10.1

November 8, 2017

Akebia Therapeucs, Inc. | Form 10-K | Page 176

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number
10.72!

10.73!

10.74!

10.75!

10.76

10.77!

10.78#

10.79!

10.80#

10.81#

10.82

10.83

Descripon of Exhibit
Amendment No. 1 to Collaboraon Agreement, dated December 2,
2022, by and between Akebia Therapeucs, Inc. and Mitsubishi Tanabe
Pharma Corporaon

Incorporated by Reference

Schedule/
Form

File No.

Exhibit

Filed Date/ Period End
Date

10-K

001-36352

10.53

March 10, 2022

Terminaon and Selement Agreement, dated June 30, 2022, by and
between the Company and Otsuka Pharmaceucal Co. Ltd.

10-Q

001-36352

10.8

August 4, 2022

Packaging Validaon Transfer Agreement, dated April 20, 2023, by and
between the Company and Otsuka Pharmaceucal Co. Ltd.

10-Q

001-36352

10.3

August 28, 2023

Second Amended and Restated License Agreement, dated February 18,
2022, by and between Akebia Therapeucs, Inc. and Vifor (Internaonal)
Ltd.

10-K

001-36352

10.54

March 1, 2022

Open Market Sale Agreement
Akebia Therapeucs, Inc. and Jefferies LLC

SM

, dated April 7, 2022, by and between

8-K

001-36352

1.1

April 7, 2022

Second Amended and Restated License Agreement dated April 17, 2019,
by and between Akebia Therapeucs, Inc. and Panion & BF Biotech, Inc.

10-Q

001-36352

10.1

August 8, 2019

Amended and Restated Sub-License Agreement, dated June 8, 2009, as
amended by the First Amendment thereto, dated June 12, 2013, by and
between Keryx Biopharmaceucals, Inc., Japan Tobacco, Inc. and Torii
Pharmaceucal Co., Ltd

Master Manufacturing Services Agreement by and between Keryx
Biopharmaceucals, Inc. and Patheon Manufacturing Services LLC and
certain of its affiliates, dated September 27, 2016, and related Product
Agreement dated September 27, 2016, and related Product Agreement
dated October 12, 2016

Product Agreement, dated August 29, 2017, by and between Keryx
Biopharmaceucals, Inc. and Patheon Inc. (an affiliate of Patheon
Manufacturing Services LLC) related to the Master Manufacturing
Services Agreement by and between Keryx Biopharmaceucals, Inc. and
Patheon Manufacturing Services LLC and certain of its affiliates dated
November 12, 2016

Master Manufacturing Services and Supply Agreement, dated December
20, 2017, by and between Keryx Biopharmaceucals, Inc. and Siegfried
Evionnaz SA

Amendment No. 1 to Master Manufacturing Services and Supply
Agreement, dated as of December 21, 2020, by and between Siegfried
Evionnaz SA and Keryx Biopharmaceucals, Inc.

Amendment No. 2 to Master Manufacturing Services and Supply
Agreement, dated as of January 29, 2021, by and between Siegfried
Evionnaz SA and Keryx Biopharmaceucals, Inc.

10-Q

000-30929

10.1

November 7, 2017

10-K

001-36352

10.58

March 1, 2022

10-Q

000-30929

10.2

November 7, 2017

10-K

000-30929

10.13

February 21, 2018

10-K

001-36352

10.57

February 25, 2021

10-K

001-36352

10.58

February 25, 2021

Akebia Therapeucs, Inc. | Form 10-K | Page 177

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number
10.84!

10.85

10.86!

10.87#

10.88!

10.89!

10.90!

10.91!

10.92!

10.93*!

10.94!

10.95!

Descripon of Exhibit
Amendment No. 3 to Master Manufacturing Services and Supply
Agreement, dated as of February 11, 2021, by and between Siegfried
Evionnaz SA and Keryx Biopharmaceucals, Inc.

Amendment No. 4 to Master Manufacturing Services and Supply
Agreement, dated as of December 17, 2021, by and between Siegfried
Evionnaz SA and Keryx Biopharmaceucals, Inc.

Incorporated by Reference

Schedule/
Form

File No.

Exhibit

Filed Date/ Period End
Date

10-K

001-36352

10.59

February 25, 2021

10-K

001-36352

10.64

March 1, 2022

Amendment No. 5 to Master Manufacturing Services and Supply
Agreement, dated February 28, 2023, by and between Keryx
Biopharmaceucals, Inc. and Siegfried Evionnaz SA

10-Q

001-36352

10.2

May 8, 2023

Exclusive Distribuon Agreement between Keryx Biopharmaceucals,
Inc. and Cardinal Health 105, Inc., dated October 16, 2014 and First
Amendment to Exclusive Distribuon Agreement between Keryx
Biopharmaceucals, Inc. and Cardinal Health 105, Inc., dated April 14,
2015

10-K

001-36352

10.60

March 26, 2019

Terminaon and Selement Agreement, dated December 22, 2022, by
and between Keryx Biopharmaceucals, Inc. and BioVectra Inc.

10-K

001-36352

10.70

March 10, 2023

Loan Agreement, dated November 11, 2019, by and among the
Company, Keryx Biopharmaceucals, Inc., Biopharma Credit plc and
Biopharma Credit Investments V (Master) LP

First Amendment and Waiver, dated February 18, 2022, by and among
the Company, Biopharma Credit plc, BPCR Limited Partnership and
Biopharma Credit Investments V (Master) LP

Second Amendment and Waiver, dated July 15, 2022, by and among the
Company, Biopharma Credit plc, BPCR Limited Partnership and
Biopharma Credit Investments V (Master) LP

Third Amendment to Loan Agreement, dated as of June 30, 2023, by and
among the Company, Biopharma Credit plc, BPCR Limited Partnership
and Biopharma Credit Investments V (Master) LP

Fourth Amendment to Loan Agreement dated as of October 31, 2023, by
and among the Company, BioPharma Credit PLC, BPCR Limted
Partnership, and BioPharma Credit Investments V (Master) LP

Guaranty and Security Agreement, dated November 25, 2019, by and
between the Company, Keryx Biopharmaceucals, Inc. and Biopharma
Credit plc

10-K

001-36352

10.62

March 12, 2020

10-K

001-36352

10.69

March 1, 2022

10-Q

001-36352

10.9

August 4, 2022

10-Q

001-36352

10.2

August 28, 2023

10-K

001-36352

10.63

March 12, 2022

Supply Agreement, dated as of March 11, 2020, by and between Akebia
Therapeucs, Inc. and Patheon, Inc.

10-Q

001-36352

10.1

May 5, 2020

Akebia Therapeucs, Inc. | Form 10-K | Page 178

 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number
10.96!

10.97!

10.98!

10.99!

10.100!

10.101!

10.102*!

10.103*

21.1

23.1*

31.1*

31.2*

32.1*

Descripon of Exhibit
Supply Agreement, dated as of April 2, 2020, by and between Akebia
Therapeucs, Inc. and STA Pharmaceucal Hong Kong Limited

Incorporated by Reference

Schedule/
Form

File No.

10-Q

001-36352

Exhibit

10.2

Filed Date/ Period End
Date

August 10, 2020

Amendment No. 1 to the Supply Agreement, dated as of April 15, 2021,
by and between Akebia Therapeucs, Inc, and STA Pharmaceucal Hong
Kong Limited

10-Q

001-36352

10.1

August 5, 2021

Supply Agreement, dated February 10, 2021, by and between the
Company and STA Pharmaceucal Hong Kong Limited

10-Q

001-36352

10.4

May 10, 2021

Royalty Interest Acquision Agreement, dated February 25, 2021, by and
between the Company and HealthCare Royalty Partners IV, L.P.

10-Q

001-36352

10.5

May 10, 2021

License Agreement, dated December 22, 2022, by and among Akebia
Therapeucs, Inc., Keryx Biopharmaceucals, Inc. and Averoa SAS

10-K

001-36352

10.81

March 10, 2023

License Agreement, dated May 24, 2023, by and between the Company
and MEDICE Arzneimiel Püer GmbH & Co. KG

10-Q

001-36352

10.1

August 28, 2023

Agreement for the Provision of a Loan Facility dated January 29, 2024
between the Company and Kreos Capital VII (UK) Limited

Warrant Agreement dated January 29, 2024 by and between the
Company and Kreos Capital VII Aggregator SCSp

List of Subsidiaries

10-K

001-36352

21.1

February 25, 2021

Consent of Ernst & Young LLP

Cerficaon of Principal Execuve Officer Required Under Rule 13a-14(a)
of the Securies Exchange Act of 1934, as amended

Cerficaon of Principal Financial Officer Required Under Rule 13a-14(a)
of the Securies Exchange Act of 1934, as amended

Cerficaon of Principal Execuve Officer and Principal Financial Officer
Required Under Rule 13a-14(b) of the Securies Exchange Act of 1934, as
amended, and 18 U.S.C. 1350

97.1†*

Akebia Therapeucs, Inc. Dodd-Frank Compensaon Recovery Policy

101.INS*

Inline XBRL Instance Document (the instance document does not appear
in the Interacve Data File because XBRL tags are embedded within the
Inline XBRL document)

Akebia Therapeucs, Inc. | Form 10-K | Page 179

 
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number

Descripon of Exhibit

Incorporated by Reference

Schedule/
Form

File No.

Exhibit

Filed Date/ Period End
Date

101.SCH*

Inline XBRL Taxonomy Extension Schema Document

101.CAL*

Inline XBRL Taxonomy Extension Calculaon Linkbase Document

101.DEF*

Inline XBRL Taxonomy Extension Definion Linkbase Document

101.LAB*

101.PRE*

104

Inline XBRL Taxonomy Extension Labels Linkbase Document

Inline XBRL Taxonomy Extension Presentaon Linkbase Document

Cover Page Interacve Data File (formaed as Inline XBRL and contained
in Exhibit 101)

* Filed, or submied electronically, herewith

† Indicates management contract or compensatory plan

# Indicates porons of the exhibit (indicated by asterisks) have been omied pursuant to a request for confidenal treatment

! Indicates porons of the exhibit (indicated by asterisks) have been omied pursuant to Item 601(b)(10)(iv) of Regulaon S-K

** The schedules to the Agreement and Plan of Merger have been omied pursuant to Item 601(b)(2) of Regulaon S-K. The Company will furnish copies of such schedules
to the Securies and Exchange Commission upon request by the Commission

Item 16. Form 10-K Summary 

None.

Akebia Therapeucs, Inc. | Form 10-K | Page 180

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Pursuant to the requirements of Secon 13 or 15(d) of the Securies Exchange Act of 1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned thereunto duly authorized.

SIGNATURES

Date: March 14, 2024

AKEBIA THERAPEUTICS, INC.

By:

/s/ John P. Butler 
John P. Butler
President and Chief Execuve Officer

Pursuant to the requirements of the Securies Exchange Act of 1934, this report was signed by the following persons on behalf of the registrant and in the
capacies and on the date indicated.

Akebia Therapeucs, Inc. | Form 10-K | Page 181

 
 
 
   
 
 
 
 
 
 
 
 
Table of Contents

Date: March 14, 2024

By:

/s/ John P. Butler 
John P. Butler
Director, President and Chief Execuve Officer (Principal Execuve Officer)

Date: March 14, 2024

By:

/s/ Ellen E. Snow
Ellen E. Snow
Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)

Date: March 14, 2024

/s/ Richard C. Malabre
Richard C. Malabre
Chief Accounng Officer (Principal Accounng Officer)

Date: March 14, 2024

By:

Date: March 14, 2024

By:

Date: March 14, 2024

By:

Date: March 14, 2024

Date: March 14, 2024

Date: March 14, 2024

Date: March 14, 2024

By:

By:

By:

By:

/s/ Adrian Adams 
Adrian Adams
Chairperson and Director

/s/ Ron Frieson
Ron Frieson
Director

/s/ Steven C. Gilman 
Steven C. Gilman
Director

/s/ Michael Rogers 
Michael Rogers
Director

/s/ Cynthia Smith 
Cynthia Smith
Director

/s/ Myles Wolf
Myles Wolf
Director

/s/ LeAnne M. Zumwalt
LeAnne M. Zumwalt
Director

Akebia Therapeucs, Inc. | Form 10-K | Page 182

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
        Exhibit 4.7

THE  SECURITIES  REPRESENTED  HEREBY  AND  THE  SECURITIES  ISSUABLE  UPON  EXERCISE  HEREOF  HAVE  NOT  BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AND HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A
VIEW TO, OR IN CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SUCH TRANSFER MAY BE EFFECTED
WITHOUT  AN  EFFECTIVE  REGISTRATION  STATEMENT  RELATED  THERETO  OR  AN  OPINION  OF  COUNSEL  IN  A  FORM
SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE SECURITIES ACT OF 1933.

WARRANT

AKEBIA THERAPEUTICS, INC.

1
Warrant Shares: [_________]

Issue Date: [_________]
Initial Exercise Date: [____________]

THIS WARRANT (the “Warrant”) certifies that, for value received, Kreos Capital VII Aggregator SCSp or its assigns (the “Holder”)
2
is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after [_______]
(the “Initial Exercise Date”) and on or prior to 5:00 p.m. (New York City time) on [_______]  (the “Termination Date”) but not thereafter, to
subscribe for and purchase from Akebia Therapeutics, Inc., a Delaware corporation (the “Company”), up to the number of Warrant Shares set
forth above (as subject to adjustment hereunder, the “Warrant Shares”) of Common Stock. The purchase price of one share of Common Stock
under this Warrant shall be equal to the Exercise Price, as defined in Section 2(b).

3

Section 1.    Definitions. In addition to the terms defined elsewhere in this Warrant, the following terms have the meanings indicated

in this Section 1:

“Affiliate” means any Person that, directly or indirectly through one or more intermediaries, controls or is controlled by or is

under common control with a Person, as such terms are used in and construed under Rule 405 under the Securities Act.

“Bid Price” means, for any date, the price determined by the first of the following clauses that applies: (a) if the Common
Stock is then listed or quoted on a Trading Market, the bid price of a share of Common Stock for the time in question (or the nearest
preceding date) on the Trading Market on which the Common Stock is then listed or quoted as reported by Bloomberg (based on a
Trading Day from 9:30 a.m. (New York City time) to 4:02 p.m. (New York City time)), (b) if OTCQB or OTCQX is not a Trading
Market, the volume weighted average per share price of the Common Stock for such date (or the nearest preceding date) on OTCQB
or OTCQX as applicable, (c) if the Common Stock is not then listed or quoted for trading on OTCQB or OTCQX and if prices for
the Common Stock are then reported on The Pink Open Market (or a similar organization or agency succeeding to its functions of
reporting prices), the most recent bid price per share of the Common Stock so reported, or (d) in all other cases, the fair market value
of a share of Common Stock as determined by an independent appraiser selected in good faith by the Holders of a majority in interest
of the Warrants then outstanding and reasonably acceptable to the Company, the reasonable fees and expenses of which shall be paid
by the Company.

“Board of Directors” means the board of directors of the Company.

“Business Day” means any day other than Saturday, Sunday or other day on which commercial banks in The City of New
York are authorized or required by law to remain closed; provided, however, for clarification, commercial banks shall not be deemed
to be authorized or required by law to remain closed due to “stay at home,” “shelter-in-place,” “non-essential employee” or any other
similar orders or restrictions or the closure of any physical branch locations at the direction of any governmental authority so long as
the electronic funds

1
 To be determined pursuant to Section 2(a) of the Warrant Agreement for the Initial Warrant and Section 2(b) of the Warrant Agreement for the Tranche C Warrant.
2
 To be the Issue Date.
3
 To be eight years from Issue Date.

transfer systems (including for wire transfers) of commercial banks in The City of New York generally are open for use by customers
on such day.

“Commission” means the United States Securities and Exchange Commission.

“Common Stock” means the common stock of the Company, par value $0.00001 per share, and any other class of securities

into which such securities may hereafter be reclassified or changed.

“Common  Stock  Equivalents”  means  any  securities  of  the  Company  or  the  Subsidiaries  which  would  entitle  the  holder
thereof to acquire at any time Common Stock, including, without limitation, any debt, preferred stock, right, option, warrant or other
instrument that is at any time convertible into or exercisable or exchangeable for, or otherwise entitles the holder thereof to receive,
Common Stock.

“Exchange  Act”  means  the  Securities  Exchange  Act  of  1934,  as  amended,  and  the  rules  and  regulations  promulgated

thereunder.

“Person”  means  an  individual  or  corporation,  partnership,  trust,  incorporated  or  unincorporated  association,  joint  venture,

limited liability company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind.

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.

“Subsidiaries” means any direct or indirect subsidiary of the Company.

“Trading Day” means a day on which the Common Stock is traded on a Trading Market.

“Trading Market”  means  any  of  the  following  markets  or  exchanges  on  which  the  Common  Stock  is  listed  or  quoted  for
trading on the date in question: The Nasdaq Capital Market, The Nasdaq Global Market, The Nasdaq Global Select Market, the New
York Stock Exchange or the NYSE American (or any successors to any of the foregoing).

“Transfer Agent” means Continental Stock Transfer and Trust Company, the current transfer agent of the Company, and any

successor transfer agent of the Company.

“VWAP”  means,  for  any  date,  the  price  determined  by  the  first  of  the  following  clauses  that  applies:  (a)  if  the  Common
Stock is then listed or quoted on a Trading Market, the daily volume weighted average price per share of the Common Stock for such
date  (or  the  nearest  preceding  date)  on  the  Trading  Market  on  which  the  Common  Stock  is  then  listed  or  quoted  as  reported  by
Bloomberg (based on a Trading Day from 9:30 a.m. (New York City time) to 4:02 p.m. (New York City time)), (b) if OTCQB or
OTCQX is not a Trading Market, the volume weighted average price per share of the Common Stock for such date (or the nearest
preceding date) on OTCQB or OTCQX as applicable, (c) if the Common Stock is not then listed or quoted for trading on OTCQB or
OTCQX  and  if  prices  for  the  Common  Stock  are  then  reported  on  The  Pink  Open  Market  (or  a  similar  organization  or  agency
succeeding to its functions of reporting prices), the most recent bid price per share of the Common Stock so reported, or (d) in all
other cases, the fair market value of a share of Common Stock as determined by an independent appraiser selected in good faith by
the Holders of a majority in interest of the Warrants then outstanding and reasonably acceptable to the Company, the reasonable fees
and expenses of which shall be paid by the Company.

“Warrants” means this Warrant and other Common Stock purchase warrants issued by the Company pursuant in the event

this Warrant is subdivided.

Section 2.    Exercise.

a)

Exercise of Warrant. Exercise of the purchase rights represented by this Warrant may be made, in whole or in part, at
any time or times on or after the Initial Exercise Date and on or before the Termination Date by delivery to the Company of a duly
executed PDF copy submitted by e-mail (or e-mail attachment) of the Notice of Exercise in the form attached hereto as Annex A (the
“Notice  of  Exercise”).  Within  the  earlier  of  (i)  two  Trading  Days  and  (ii)  the  number  of  Trading  Days  comprising  the  Standard
Settlement  Period  (as  defined  in  Section  2(d)(i)  herein)  following  the  date  of  exercise  as  aforesaid,  the  Holder  shall  deliver  the
aggregate Exercise

2

Price for the Warrant Shares specified in the applicable Notice of Exercise by wire transfer or cashier’s check drawn on a United
States bank, in either case in immediately available funds, unless the cashless exercise procedure specified in Section 2(c) below is
specified  in  the  applicable  Notice  of  Exercise.  No  ink-original  Notice  of  Exercise  shall  be  required,  nor  shall  any  medallion
guarantee (or other type of guarantee or notarization) of any Notice of Exercise be required. The Company shall have no obligation
to  inquire  with  respect  to  or  otherwise  confirm  the  authenticity  of  the  signature(s)  contained  on  any  Notice  of  Exercise  nor  the
authority of the person so executing such Notice of Exercise. Notwithstanding anything herein to the contrary, the Holder shall not be
required  to  physically  surrender  this  Warrant  to  the  Company  until  the  Holder  has  purchased  all  of  the  Warrant  Shares  available
hereunder  and  the  Warrant  has  been  exercised  in  full,  in  which  case,  the  Holder  shall  surrender  this  Warrant  to  the  Company  for
cancellation  within  three  Trading  Days  of  the  date  on  which  the  final  Notice  of  Exercise  is  delivered  to  the  Company.  Partial
exercises of this Warrant resulting in purchases of a portion of the total number of Warrant Shares available hereunder shall have the
effect of lowering the outstanding number of Warrant Shares purchasable hereunder in an amount equal to the applicable number of
Warrant Shares purchased. The Holder and the Company shall maintain records showing the number of Warrant Shares purchased
and the date of such purchases. The Company shall deliver any objection to any Notice of Exercise within one Trading Day of receipt
of such notice. The  Holder  and  any  assignee,  by  acceptance  of  this  Warrant,  acknowledge  and  agree  that,  by  reason  of  the
provisions of this paragraph, following the purchase of a portion of the Warrant Shares hereunder, the number of Warrant
Shares available for purchase hereunder at any given time may be less than the amount stated on the face hereof.

b)

Exercise  Price.  The  exercise  price  per  share  of  Common  Stock  under  this  Warrant  shall  be  $1.30,  subject  to

adjustment hereunder (the “Exercise Price”).

c)

Cashless  Exercise.  If  at  the  time  of  exercise  hereof  there  is  no  effective  registration  statement  registering,  or  the
prospectus  contained  therein  is  not  available  for  the  issuance  of  the  Warrant  Shares  by  the  Holder,  or  if  otherwise  elected  by  the
Holder at any time, then this Warrant may also be exercised, in whole or in part, at such time by means of a “cashless exercise” in
which the Holder shall be entitled to receive a number of Warrant Shares equal to the quotient obtained by dividing [(A-B) (X)] by
(A), where:

(A) = as applicable: (i) the VWAP on the Trading Day immediately preceding the date of the applicable Notice of Exercise if
such  Notice  of  Exercise  is  (1)  both  executed  and  delivered  pursuant  to  Section  2(a)  hereof  on  a  day  that  is  not  a
Trading Day or (2) both executed and delivered pursuant to Section 2(a) hereof on a Trading Day prior to the opening
of “regular trading hours” (as defined in Rule 600(b) of Regulation NMS promulgated under the Exchange Act) on
such Trading Day, (ii) at the option of the Holder, either (y) the VWAP on the Trading Day immediately preceding the
date of the applicable Notice of Exercise or (z) the Bid Price of the Common Stock on the principal Trading Market
as reported by Bloomberg L.P. (“Bloomberg”)  as  of  the  time  of  the  Holder’s  execution  of  the  applicable  Notice  of
Exercise  if  such  Notice  of  Exercise  is  executed  during  “regular  trading  hours”  on  a  Trading  Day  and  is  delivered
within two hours thereafter (including until two hours after the close of “regular trading hours” on a Trading Day)
pursuant to Section 2(a) hereof or (iii) the VWAP on the date of the applicable Notice of Exercise if the date of such
Notice of Exercise is a Trading Day and such Notice of Exercise is both executed and delivered pursuant to Section
2(a) hereof after the close of “regular trading hours” on such Trading Day;

(B) = the Exercise Price of this Warrant, as adjusted hereunder; and

(X) = the number of Warrant Shares that would be issuable upon exercise of this Warrant in accordance with the terms of this

Warrant if such exercise were by means of a cash exercise rather than a cashless exercise.

If Warrant Shares are issued in such a cashless exercise, the parties acknowledge and agree that in accordance with Section
3(a)(9)  of  the  Securities  Act,  the  Warrant  Shares  shall  take  on  the  registered  characteristics  of  the  Warrants  being  exercised.  The
Company agrees not to take any position contrary to this Section 2(c).

3

d)

Mechanics of Exercise.

i. Delivery of Warrant Shares Upon Exercise. The Company shall cause the Warrant Shares purchased hereunder to be
transmitted by the Transfer Agent to the Holder by crediting the account of the Holder’s or its designee’s balance
account with The Depository Trust Company through its Deposit or Withdrawal at Custodian system (“DWAC”) if
the  Company’s  transfer  agent  is  then  a  participant  in  such  system  and  either  (A)  there  is  an  effective  registration
statement  permitting  the  issuance  of  the  Warrant  Shares  to  or  resale  of  the  Warrant  Shares  by  the  Holder,  (B)  the
Warrant Shares are eligible for resale by the Holder without volume or manner-of-sale limitations or the requirement
for current public information, in each case, pursuant to Rule 144 (assuming cashless exercise of the Warrant), or (C)
pursuant to a resale on a case-by-case basis by the Holder without volume or manner-of-sale limitations pursuant to
Rule 144 (assuming cashless exercise of the Warrant), and otherwise by physical delivery of a certificate, registered
in the Company’s share register in the name of the Holder or its designee, for the number of Warrant Shares to which
the Holder is entitled pursuant to such exercise to the address specified by the Holder in the Notice of Exercise by
the date that is the earliest of (i) two Trading Days after the delivery to the Company of the Notice of Exercise, (ii)
one Trading Day after delivery of the aggregate Exercise Price to the Company and (iii) the number of Trading Days
comprising the Standard Settlement Period after the delivery to the Company of the Notice of Exercise (such date,
the  “Warrant  Share  Delivery  Date”);  provided  that  the  Company  shall  have  received  payment  of  the  aggregate
Exercise  Price  (other  than  in  the  case  of  a  cashless  exercise)  prior  to  such  applicable  date.  Upon  delivery  of  the
Notice of Exercise, the Holder shall be deemed for all corporate purposes to have become the holder of record of the
Warrant  Shares  with  respect  to  which  this  Warrant  has  been  exercised,  irrespective  of  the  date  of  delivery  of  the
Warrant Shares, provided that the Company shall have received payment of the aggregate Exercise Price (other than
in the case of a cashless exercise) within the earlier of (i) two Trading Days and (ii) the number of Trading Days
comprising  the  Standard  Settlement  Period  following  delivery  of  the  Notice  of  Exercise.  The  Company  agrees  to
maintain a transfer agent that is a participant in the FAST program so long as this Warrant remains outstanding and
exercisable.  As  used  herein,  “Standard  Settlement  Period”  means  the  standard  settlement  period,  expressed  in  a
number of Trading Days, on the Company’s primary Trading Market with respect to the Common Stock as in effect
on the date of the delivery of the Notice of Exercise.

ii.

Delivery  of  New  Warrants  Upon  Exercise.  If  this  Warrant  shall  have  been  exercised  in  part,  the
Company shall, at the request of a Holder and upon surrender of this Warrant, at the time of delivery of the Warrant
Shares, deliver to the Holder a new Warrant evidencing the rights of the Holder to purchase the unpurchased Warrant
Shares remaining available under this Warrant, which new Warrant shall in all other respects be identical with this
Warrant.

iii.

Rescission Rights.  If  the  Company  fails  to  cause  the  Transfer  Agent  to  transmit  to  the  Holder  the
Warrant Shares pursuant to Section 2(d)(i) by the Warrant Share Delivery Date, then the Holder will have the right to
rescind such exercise; provided, however, that the Holder shall be required to return any Warrant Shares subject to
any such rescinded exercise notice concurrently with the return to Holder of the aggregate Exercise Price paid to the
Company for such Warrant Shares and the restoration of Holder’s right to acquire such Warrant Shares pursuant to
this Warrant (including, issuance of a replacement warrant certificate evidencing such restored right).

iv.

No  Fractional  Shares  or  Scrip.  No  fractional  shares  or  scrip  representing  fractional  shares  shall  be
issued upon the exercise of this Warrant. As to any fraction of a share which the Holder would otherwise be entitled
to

4

purchase upon such exercise, the Company shall, at its election, either pay a cash adjustment in respect of such final
fraction in an amount equal to such fraction multiplied by the Exercise Price or round up to the next whole share.

v.

Charges,  Taxes  and  Expenses.  Issuance  of  Warrant  Shares  shall  be  made  without  charge  to  the
Holder for any issue or transfer tax or other incidental expense in respect of the issuance of such Warrant Shares, all
of which taxes and expenses shall be paid by the Company, and such Warrant Shares shall be issued in the name of
the Holder or in such name or names as may be directed by the Holder; provided, however, that in the event that
Warrant  Shares  are  to  be  issued  in  a  name  other  than  the  name  of  the  Holder,  this  Warrant  when  surrendered  for
exercise shall be accompanied by the assignment form attached hereto as Annex B (the “Assignment Form”)  duly
executed  by  the  Holder  and  the  Company  may  require,  as  a  condition  thereto,  the  payment  of  a  sum  sufficient  to
reimburse  it  for  any  transfer  tax  incidental  thereto.  The  Company  shall  pay  all  Transfer  Agent  fees  required  for
same-day processing of any Notice of Exercise and all fees to the Depository Trust Company (or another established
clearing corporation performing similar functions) required for same-day electronic delivery of the Warrant Shares.

vi.

Closing  of  Books.  The  Company  will  not  close  its  stockholder  books  or  records  in  any  manner

which prevents the timely exercise of this Warrant, pursuant to the terms hereof.

e)

Beneficial Ownership Limitations. The Company shall not effect any exercise of this Warrant, and a Holder shall not
have the right to exercise any portion of this Warrant, pursuant to Section 2 or otherwise, to the extent that after giving effect to such
issuance after exercise as set forth on the applicable Notice of Exercise, the Holder (together with the Holder’s Affiliates, and any
other  Persons  acting  as  a  group  together  with  the  Holder  or  any  of  the  Holder’s  Affiliates  (such  Persons,  “Attribution  Parties”)),
would beneficially own in excess of the Beneficial Ownership Limitation (as defined below). For purposes of the foregoing sentence,
the number of shares of Common Stock beneficially owned by the Holder and its Affiliates and Attribution Parties shall include the
number of shares of Common Stock issuable upon exercise of this Warrant with respect to which such determination is being made,
but shall exclude the number of shares of Common Stock which would be issuable upon (i) exercise of the remaining, nonexercised
portion of this Warrant beneficially owned by the Holder or any of its Affiliates or Attribution Parties and (ii) exercise or conversion
of the unexercised or nonconverted portion of any other securities of the Company (including, without limitation, any other Common
Stock Equivalents) subject to a limitation on conversion or exercise analogous to the limitation contained herein beneficially owned
by the Holder or any of its Affiliates or Attribution Parties. Except as set forth in the preceding sentence, for purposes of this Section
2(e), beneficial ownership shall be calculated in accordance with Section 13(d) of the Exchange Act and the rules and regulations
promulgated  thereunder,  it  being  acknowledged  by  the  Holder  that  the  Company  is  not  representing  to  the  Holder  that  such
calculation is in compliance with Section 13(d) of the Exchange Act and the Holder is solely responsible for any schedules required
to be filed in accordance therewith and the calculations required under this Section 2(e). To the extent that the limitation contained in
this Section 2(e) applies, the determination of whether this Warrant is exercisable (in relation to other securities owned by the Holder
together with any Affiliates and Attribution Parties) and of which portion of this Warrant is exercisable shall be in the sole discretion
of the Holder, and the submission of a Notice of Exercise shall be deemed to be the Holder’s determination of whether this Warrant is
exercisable (in relation to other securities owned by the Holder together with any Affiliates and Attribution Parties) and of which
portion of this Warrant is exercisable, in each case subject to the Beneficial Ownership Limitation, and the Company shall have no
obligation  to  verify  or  confirm  the  accuracy  of  such  determination.  In  addition,  a  determination  as  to  any  group  status  as
contemplated  above  shall  be  determined  in  accordance  with  Section  13(d)  of  the  Exchange  Act  and  the  rules  and  regulations
promulgated  thereunder.  For  purposes  of  this  Section  2(e),  in  determining  the  number  of  outstanding  shares  of  Common  Stock,  a
Holder may rely on the number of outstanding shares of Common Stock as reflected in (A) the Company’s most recent periodic or
annual report filed with the Commission, as the case may be, (B) a more recent public announcement by the Company or (C) a more
recent

5

written notice by the Company or the Transfer Agent setting forth the number of shares of Common Stock outstanding. Upon the
written  or  oral  request  of  a  Holder,  the  Company  shall  within  one  Trading  Day  confirm  orally  and  in  writing  to  the  Holder  the
number  of  shares  of  Common  Stock  then  outstanding.  In  any  case,  the  number  of  outstanding  shares  of  Common  Stock  shall  be
determined after giving effect to the conversion or exercise of securities of the Company, including this Warrant, by the Holder or its
Affiliates or Attribution Parties since the date as of which such number of outstanding shares of Common Stock was reported. The
“Beneficial Ownership Limitation” shall be 4.99% (or, upon election by a Holder prior to the issuance of any Warrants, 9.99% or
19.99%)  of  the  number  of  shares  of  the  Common  Stock  outstanding  immediately  after  giving  effect  to  the  issuance  of  shares  of
Common  Stock  issuable  upon  exercise  of  this  Warrant.  The  Holder,  upon  notice  to  the  Company,  may  increase  or  decrease  the
Beneficial  Ownership  Limitation  provisions  of  this  Section  2(e),  provided  that  the  Beneficial  Ownership  Limitation  in  no  event
exceeds 19.99% of the number of shares of the Common Stock outstanding immediately after giving effect to the issuance of shares
of Common Stock upon exercise of this Warrant held by the Holder and the provisions of this Section 2(e) shall continue to apply.
Any  increase  in  the  Beneficial  Ownership  Limitation  will  not  be  effective  until  the  61   day  after  such  notice  is  delivered  to  the
Company. The provisions of this Section 2(e) shall be construed and implemented in a manner otherwise than in strict conformity
with the terms of this Section 2(e) to correct this Section 2(e) (or any portion hereof) which may be defective or inconsistent with the
intended Beneficial Ownership Limitation herein contained or to make changes or supplements necessary or desirable to properly
give effect to such limitation. The limitations contained in this Section 2(e) shall apply to a successor holder of this Warrant. This
provision shall not restrict the number of shares of Common Stock which the holder of this Warrant may receive or beneficially own
in order to determine the amount of securities or other consideration that such Holder may receive in the event of a Fundamental
Transaction. This restriction may not be waived without stockholder approval.

st

Section 3.    Certain Adjustments.

a)

Stock Dividends and Splits. If the Company, at any time while this Warrant is outstanding: (i) pays a stock dividend
or otherwise makes a distribution or distributions on shares of its Common Stock or any other equity or equity equivalent securities
payable in shares of Common Stock (which, for avoidance of doubt, shall not include any shares of Common Stock issued by the
Company upon exercise of this Warrant), (ii) subdivides outstanding shares of Common Stock into a larger number of shares, (iii)
combines  (including  by  way  of  reverse  stock  split)  outstanding  shares  of  Common  Stock  into  a  smaller  number  of  shares,  or  (iv)
issues by reclassification of shares of the Common Stock any shares of capital stock of the Company, then in each case the Exercise
Price shall be multiplied by a fraction of which the numerator shall be the number of shares of Common Stock (excluding treasury
shares, if any) outstanding immediately before such event and of which the denominator shall be the number of shares of Common
Stock  outstanding  immediately  after  such  event,  and  the  number  of  shares  issuable  upon  exercise  of  this  Warrant  shall  be
proportionately  adjusted  such  that  the  aggregate  Exercise  Price  of  this  Warrant  shall  remain  unchanged.  Any  adjustment  made
pursuant to this Section 3(a) shall become effective immediately after the record date for the determination of stockholders entitled to
receive  such  dividend  or  distribution  and  shall  become  effective  immediately  after  the  effective  date  in  the  case  of  a  subdivision,
combination or re-classification.

b)

Subsequent Rights Offerings. In addition to any adjustments pursuant to Section 3(a) above, if at any time while this
Warrant  is  outstanding  the  Company  grants,  issues  or  sells  any  Common  Stock  Equivalents  or  rights  to  purchase  stock,  warrants,
securities or other property pro rata to the record holders of any class of shares of Common Stock (the “Purchase Rights”), then the
Holder  will  be  entitled  to  acquire,  upon  the  terms  applicable  to  such  Purchase  Rights,  the  aggregate  Purchase  Rights  which  the
Holder could have acquired if the Holder had held the number of shares of Common Stock acquirable upon complete exercise of this
Warrant  (without  regard  to  any  limitations  on  exercise  hereof,  including  without  limitation,  the  Beneficial  Ownership  Limitation)
immediately before the date on which a record is taken for the grant, issuance or sale of such Purchase Rights, or, if no such record is
taken, the date as of which the record holders of shares of Common Stock are to be determined for the grant, issue or sale of such
Purchase Rights (provided, however, that, to the extent that the Holder’s right to participate in any such Purchase Right would result
in the Holder exceeding the Beneficial Ownership

6

Limitation, then the Holder shall not be entitled to participate in such Purchase Right to such extent (or beneficial ownership of such
shares of Common Stock as a result of such Purchase Right to such extent) and such Purchase Right to such extent shall be held in
abeyance  for  the  Holder  until  such  time,  if  ever,  as  its  right  thereto  would  not  result  in  the  Holder  exceeding  the  Beneficial
Ownership  Limitation);  provided,  that  such  Purchase  Right  shall  terminate  on,  and  shall  not  be  held  in  abeyance  for  any  period
subsequent to the Termination Date.

c)

Pro Rata Distributions. During such time as this Warrant is outstanding, if the Company shall declare or make any
dividend or other distribution of its assets (or rights to acquire its assets) to holders of shares of Common Stock, by way of return of
capital or otherwise (including, without limitation, any distribution of cash, stock or other securities, property or options by way of a
dividend, spin off, reclassification, corporate rearrangement, scheme of arrangement or other similar transaction) (a “Distribution”),
at any time after the issuance of this Warrant, then, in each such case, the Holder shall be entitled to participate in such Distribution
to the same extent that the Holder would have participated therein if the Holder had held the number of shares of Common Stock
acquirable upon complete exercise of this Warrant (without regard to any limitations on exercise hereof, including without limitation,
the  Beneficial  Ownership  Limitation)  immediately  before  the  date  of  which  a  record  is  taken  for  such  Distribution,  or,  if  no  such
record is taken, the date as of which the record holders of shares of Common Stock are to be determined for the participation in such
Distribution (provided, however, that to the extent that the Holder’s right to participate in any such Distribution would result in the
Holder  exceeding  the  Beneficial  Ownership  Limitation,  then  the  Holder  shall  not  be  entitled  to  participate  in  such  Distribution  to
such extent (or in the beneficial ownership of any shares of Common Stock as a result of such Distribution to such extent) and the
portion of such Distribution shall be held in abeyance for the benefit of the Holder until such time, if ever, as its right thereto would
not result in the Holder exceeding the Beneficial Ownership Limitation); provided, that such Purchase Right shall terminate on, and
shall not be held in abeyance for any period subsequent to the Termination Date.

d)

Fundamental  Transaction.  If,  at  any  time  while  this  Warrant  is  outstanding,  (i)  the  Company  (and  all  of  its
Subsidiaries, taken as a whole), directly or indirectly, in one or more related transactions effects any merger or consolidation of the
Company  with  or  into  another  Person  (other  than  for  the  purpose  of  changing  the  Company’s  name  and/or  the  jurisdiction  of
incorporation  of  the  Company  or  a  holding  company  for  the  Company),  (ii)  the  Company,  directly  or  indirectly,  effects  any  sale,
lease, license, assignment, transfer, conveyance or other disposition of all or substantially all of its assets in one or a series of related
transactions, (iii) any, direct or indirect, purchase offer, tender offer or exchange offer (whether by the Company or another Person) is
completed  pursuant  to  which  holders  of  Common  Stock  are  permitted  to  sell,  tender  or  exchange  their  shares  for  other  securities,
cash or property and has been accepted by the holders of 50% or more of the outstanding Common Stock or 50% or more of the
voting power of the common equity of the Company, (iv) the Company, directly or indirectly, in one or more related transactions
effects any reclassification, reorganization or recapitalization of the Common Stock or any compulsory share exchange pursuant to
which  the  Common  Stock  is  effectively  converted  into  or  exchanged  for  other  securities,  cash  or  property,  or  (v)  the  Company,
directly  or  indirectly,  in  one  or  more  related  transactions  consummates  a  stock  or  share  purchase  agreement  or  other  business
combination  (including,  without  limitation,  a  reorganization,  recapitalization,  spin-off,  merger  or  scheme  of  arrangement)  with
another Person or group of Persons whereby such other Person or group acquires 50% or more of the outstanding shares of Common
Stock  or  50%  or  more  of  the  voting  power  of  the  common  equity  of  the  Company  (each  a  “Fundamental Transaction”),  then  this
Warrant shall be deemed to have been automatically converted pursuant to Section 2(c), and thereafter the Holder shall be entitled to
participate  in  the  Fundamental  Transaction  on  the  same  terms  as  other  holders  of  the  same  class  of  securities  of  the  Company;
provided, however, that if the VWAP of the Warrant Shares on the date of the closing of such Fundamental Transaction is less than
the aggregate Exercise Price, then this Warrant shall terminate without exercise or conversion immediately prior, and subject, to the
closing of such Fundamental Transaction.

e)

Calculations. All calculations under this Section 3 shall be made by the Company to the nearest cent or the nearest
1/100th of a share, as the case may be. For purposes of this Section 3, the number of shares of Common Stock deemed to be issued
and outstanding as of a

7

given date shall be the sum of the number of shares of Common Stock (excluding treasury shares, if any) issued and outstanding.

f)

Notice to Holder.

i.

Adjustment to Exercise Price. Whenever the Exercise Price is adjusted pursuant to any provision of
this Section 3, the Company shall promptly deliver to the Holder by email a notice setting forth the Exercise Price
after  such  adjustment  and  any  resulting  adjustment  to  the  number  of  Warrant  Shares  and  setting  forth  a  brief
statement of the facts requiring such adjustment.

ii.

Notice  to  Allow  Exercise  by  Holder.  If  (A)  the  Company  shall  declare  a  dividend  (or  any  other
distribution  in  whatever  form)  on  the  Common  Stock,  (B)  the  Company  shall  declare  a  special  nonrecurring  cash
dividend on or a redemption of the Common Stock, (C) the Company shall authorize the granting to all holders of
the Common Stock rights or warrants to subscribe for or purchase any shares of capital stock of any class or of any
rights, (D) the approval of any stockholders of the Company shall be required in connection with any reclassification
of  the  Common  Stock,  any  consolidation  or  merger  to  which  the  Company  (and  all  of  its  Subsidiaries,  taken  as  a
whole) is a party, any sale or transfer of all or substantially all of the assets of the Company, or any compulsory share
exchange whereby the Common Stock is converted into other securities, cash or property, or (E) the Company shall
authorize the voluntary or involuntary dissolution, liquidation or winding up of the affairs of the Company, then, in
each case, the Company shall cause to be delivered by email to the Holder at its last email or other address as it shall
appear  upon  the  Warrant  Register  of  the  Company,  at  least  20  calendar  days  prior  to  the  applicable  record  or
effective date hereinafter specified, a notice stating (x) the date on which a record is to be taken for the purpose of
such dividend, distribution, redemption, rights or warrants, or if a record is not to be taken, the date as of which the
holders of the Common Stock of record to be entitled to such dividend, distributions, redemption, rights or warrants
are  to  be  determined  or  (y)  the  date  on  which  such  reclassification,  consolidation,  merger,  sale,  transfer  or  share
exchange  is  expected  to  become  effective  or  close,  and  the  date  as  of  which  it  is  expected  that  holders  of  the
Common Stock of record shall be entitled to exchange their shares of the Common Stock for securities, cash or other
property deliverable upon such reclassification, consolidation, merger, sale, transfer or share exchange; provided that
the failure to deliver such notice or any defect therein or in the delivery thereof shall not affect the validity of the
corporate  action  required  to  be  specified  in  such  notice.  To  the  extent  that  any  notice  provided  in  this  Warrant
constitutes,  or  contains,  material,  non-public  information  regarding  the  Company  or  any  of  the  Subsidiaries,  the
Company shall simultaneously file such notice with the Commission pursuant to a Current Report on Form 8-K. The
Holder shall remain entitled to exercise this Warrant during the period commencing on the date of such notice to the
effective date of the event triggering such notice except as may otherwise be expressly set forth herein.

Section 4.    Transfer of Warrant.

a)

Restricted Securities. The Holder understands that neither this Warrant nor the Warrant Shares have been registered
under  the  Securities  Act,  by  reason  of  a  specific  exemption  from  the  registration  provisions  of  the  Securities  Act.  The  Holder
understands  that  the  Warrant  and  the  Warrant  Shares  are  “restricted  securities”  under  applicable  U.S.  federal  and  state  securities
laws and that, pursuant to these laws, the Holder must hold the Warrant or the Warrant Shares indefinitely unless they are registered
with the Commission and qualified by state authorities, or an exemption from such registration and qualification requirements is
available. The Holder understands that this Warrant and the Warrant Shares and any securities issued in respect of or exchange for
such securities, may bear one or all of the following legends (in substantially the form set forth below):

8

“THE  SECURITIES  REPRESENTED  HEREBY  AND  THE  SECURITIES  ISSUABLE  UPON  CONVERSION
HEREOF  HAVE  NOT  BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT  OF  1933,  AS  AMENDED  (THE
“SECURITIES ACT”), AND HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN
CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF. NO SUCH TRANSFER MAY BE EFFECTED
WITHOUT  AN  EFFECTIVE  REGISTRATION  STATEMENT  RELATED  THERETO  OR  AN  OPINION  OF
COUNSEL IN A FORM SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED
UNDER THE SECURITIES ACT.”

and, any legend required by the securities laws of any state to the extent such laws are applicable to the Securities represented by
the certificate so legended.

b)

Transferability. Subject to the restrictions of Section 4(a), this Warrant and all rights hereunder (including, without
limitation, any registration rights) are transferable, in whole or in part, upon surrender of this Warrant at the principal office of the
Company or its designated agent, together with a written assignment of this Warrant substantially in the form attached hereto duly
executed  by  the  Holder  or  its  agent  or  attorney  and  funds  sufficient  to  pay  any  transfer  taxes  payable  upon  the  making  of  such
transfer. Upon such surrender and, if required, such payment, the Company shall execute and deliver a new Warrant or Warrants in
the  name  of  the  assignee  or  assignees,  as  applicable,  and  in  the  denomination  or  denominations  specified  in  such  instrument  of
assignment, and shall issue to the assignor a new Warrant evidencing the portion of this Warrant not so assigned, and this Warrant
shall  promptly  be  cancelled.  Notwithstanding  anything  herein  to  the  contrary,  the  Holder  shall  not  be  required  to  physically
surrender this Warrant to the Company unless the Holder has assigned this Warrant in full, in which case, the Holder shall surrender
this Warrant to the Company within three Trading Days of the date on which the Holder delivers a duly executed Assignment Form
to the Company assigning this Warrant in full. The Warrant, if properly assigned in accordance herewith, may be exercised by a
new holder for the purchase of Warrant Shares without having a new Warrant issued.

c)

New  Warrants.  This  Warrant  may  be  divided  or  combined  with  other  Warrants  upon  presentation  hereof  at  the
aforesaid office of the Company, together with a written notice specifying the names and denominations in which new Warrants are
to be issued, signed by the Holder or its agent or attorney. Subject to compliance with Section 4(a), as to any transfer which may be
involved in such division or combination, the Company shall execute and deliver a new Warrant or Warrants in exchange for the
Warrant or Warrants to be divided or combined in accordance with such notice. All Warrants issued on transfers or exchanges shall
be dated the initial issuance date of this Warrant and shall be identical with this Warrant except as to the number of Warrant Shares
issuable pursuant thereto.

d)

Warrant Register. The Company shall register this Warrant, upon records to be maintained by the Company for that
purpose (the “Warrant Register”), in the name of the record Holder hereof from time to time. The Company may deem and treat the
registered  Holder  of  this  Warrant  as  the  absolute  owner  hereof  for  the  purpose  of  any  exercise  hereof  or  any  distribution  to  the
Holder, and for all other purposes, absent actual notice to the contrary.

Section 5.    Piggyback Registration Rights. If during the six-month period following the date of this Warrant the Company proposes to file a
registration statement on Form S-1 or Form S-3 under the Securities Act providing for shelf registration of the Common Stock of
any other person pursuant to “piggyback” registration rights of such other person, the Company shall promptly give notice to the
Holder of this Warrant and, upon the request of such Holder, use its reasonable best efforts to also cause to be registered for the
resale thereof the Warrant Shares on such registration statement for any remaining portion of the six-month period following the
date of this Warrant. It shall be a condition precedent to the obligations of the Company to take any action pursuant to this Section 5
with  respect  to  the  Warrant  Shares  that  the  Holder  shall  furnish  to  the  Company  such  information  regarding  itself,  the  Warrant
Shares held by it, the intended

9

method  of  disposition  of  such  securities  and  any  other  information  as  is  reasonably  required  to  effect  the  registration  of  such
Warrant Shares.

Section 6.    Miscellaneous.

a)

No Rights as Stockholder Until Exercise; No Settlement in Cash.  This  Warrant  does  not  entitle  the  Holder  to  any
voting rights, dividends or other rights as a stockholder of the Company prior to the exercise hereof as set forth in Section 2(d)(i),
except as expressly set forth in Section 3. Without limiting any rights of a Holder to receive Warrant Shares on a “cashless exercise”
pursuant  to  Section  2(c)  or  to  receive  cash  payments  pursuant  to  Section  2(d)(i)  and  Section  2(d)(iv)  herein,  including  if  the
Company is for any reason unable to issue and deliver Warrant Shares upon exercise of this Warrant as required pursuant to the
terms hereof, in no event shall the Company be required to net cash settle an exercise of this Warrant or cash settle in any other
form.

b)

Loss,  Theft,  Destruction  or  Mutilation  of  Warrant.  The  Company  covenants  that  upon  receipt  by  the  Company  of
evidence reasonably satisfactory to it of the loss, theft, destruction or mutilation of this Warrant or any stock certificate relating to
the Warrant Shares, and in case of loss, theft or destruction, of indemnity or security reasonably satisfactory to it (which, in the case
of the Warrant, shall not include the posting of any bond), and upon surrender and cancellation of such Warrant or stock certificate,
if mutilated, the Company will make and deliver a new Warrant or stock certificate of like tenor and dated as of such cancellation,
in lieu of such Warrant or stock certificate.

c)

Saturdays, Sundays, Holidays, etc. If the last or appointed day for the taking of any action or the expiration of any
right required or granted herein shall not be a Trading Day, then such action may be taken or such right may be exercised on the
next succeeding Trading Day.

d)

Authorized Shares. The Company covenants that during the period the Warrant is outstanding, it will reserve from its
authorized and unissued Common Stock a sufficient number of shares to provide for the issuance of the Warrant Shares upon the
exercise of any purchase rights under this Warrant. The Company further covenants that its issuance of this Warrant shall constitute
full authority to its officers who are charged with the duty of issuing the necessary Warrant Shares upon the exercise of the purchase
rights under this Warrant. The Company will take such reasonable action as may be necessary to assure that such Warrant Shares
may  be  issued  as  provided  herein  without  violation  of  any  applicable  law  or  regulation,  or  of  any  requirements  of  the  Trading
Market upon which the Common Stock may be listed. The Company covenants that all Warrant Shares which may be issued upon
the exercise of the purchase rights represented by this Warrant will, upon exercise of the purchase rights represented by this Warrant
and payment for such Warrant Shares in accordance herewith, be duly authorized, validly issued, fully paid and nonassessable and
free  from  all  taxes,  liens  and  charges  created  by  the  Company  in  respect  of  the  issue  thereof  (other  than  taxes  in  respect  of  any
transfer occurring contemporaneously with such issue).

Except and to the extent as waived or consented to by the Holder, the Company shall not by any action, including, without
limitation,  amending  its  certificate  of  incorporation  or  through  any  reorganization,  transfer  of  assets,  consolidation,  merger,
dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the observance or performance of any of
the terms of this Warrant, but will at all times in good faith assist in the carrying out of all such terms and in the taking of all such
actions as may be necessary or appropriate to protect the rights of Holder as set forth in this Warrant against impairment. Without
limiting the generality of the foregoing, the Company will (i) not increase the par value of any Warrant Shares above the amount
payable therefor upon such exercise immediately prior to such increase in par value, (ii) take such action as may be necessary or
appropriate in order that the Company may validly and legally issue fully paid and nonassessable Warrant Shares upon the exercise
of  this  Warrant  and  (iii)  use  commercially  reasonable  efforts  to  obtain  all  such  authorizations,  exemptions  or  consents  from  any
public regulatory body having jurisdiction thereof, as may be, necessary to enable the Company to perform its obligations under
this Warrant.

10

Before taking any action which would result in an adjustment in the number of Warrant Shares for which this Warrant is
exercisable or in the Exercise Price, the Company shall obtain all such authorizations or exemptions thereof, or consents thereto, as
may be necessary from any public regulatory body or bodies having jurisdiction thereof.

e)

Jurisdiction. All questions concerning the construction, validity, enforcement and interpretation of this Warrant shall
be governed by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the
principles  of  conflicts  of  law  thereof.  The  Company  and,  by  accepting  this  Warrant,  the  Holder  each  agrees  that  all  legal
proceedings  concerning  the  interpretations,  enforcement  and  defense  of  the  transactions  contemplated  by  this  Warrant  (whether
brought  against  the  Company  or  the  Holder  or  their  respective  affiliates,  directors,  officers,  stockholders,  partners,  members,
employees, or agents) shall be commenced exclusively in the state and federal courts sitting in the City of New York. The Company
and,  by  accepting  this  Warrant,  the  Holder  each  hereby  irrevocably  submits  to  the  exclusive  jurisdiction  of  the  state  and  federal
courts  sitting  in  the  City  of  New  York,  Borough  of  Manhattan  for  the  adjudication  of  any  dispute  hereunder  or  in  connection
herewith or with any transaction contemplated hereby or discussed herein, and hereby irrevocably waives, and agrees not to assert
in  any  suit,  action  or  proceeding,  any  claim  that  it  is  not  personally  subject  to  the  jurisdiction  of  any  such  court,  that  such  suit,
action or proceeding is improper or is an inconvenient venue for such proceeding. The Company and, by accepting this Warrant, the
Holder each hereby irrevocably waives personal service of process and consents to process being served in any such suit, action or
proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery) to it at the
address  in  effect  for  notices  to  it  under  this  Warrant  and  agrees  that  such  service  shall  constitute  good  and  sufficient  service  of
process and notice thereof. Nothing contained herein shall be deemed to limit in any way any right to serve process in any other
manner permitted by law. If the Company or the Holder shall commence an action, suit or proceeding to enforce any provisions of
this  Warrant,  the  prevailing  party  in  such  action,  suit  or  proceeding  shall  be  reimbursed  by  the  other  party  for  their  reasonable
attorneys’  fees  and  other  costs  and  expenses  incurred  with  the  investigation,  preparation  and  prosecution  of  such  action  or
proceeding.

f)

Restrictions.  The  Holder  acknowledges  that  the  Warrant  Shares  acquired  upon  the  exercise  of  this  Warrant,  if  not
registered,  and  the  Holder  does  not  utilize  cashless  exercise,  will  have  restrictions  upon  resale  imposed  by  state  and  federal
securities laws.

g)

Nonwaiver and Expenses. No course of dealing or any delay or failure to exercise any right hereunder on the part of
Holder shall operate as a waiver of such right or otherwise prejudice the Holder’s rights, powers or remedies. Without limiting any
other provision of this Warrant, if the Company willfully and knowingly fails to comply with any provision of this Warrant, which
results in any material damages to the Holder, the Company shall pay to the Holder such amounts as shall be sufficient to cover any
costs and expenses including, but not limited to, reasonable attorneys’ fees, including those of appellate proceedings, incurred by
the Holder in collecting any amounts due pursuant hereto or in otherwise enforcing any of its rights, powers or remedies hereunder.

h)

Notices.  Any  and  all  notices  or  other  communications  or  deliveries  to  be  provided  by  the  Holder  hereunder
including, without limitation, any Notice of Exercise, shall be in writing and delivered personally, by email or sent by a nationally
recognized  overnight  courier  service,  addressed  to  the  Company,  at  245  First  Street,  Cambridge,  MA  02142,  Attention:  Chief
Financial Officer and Chief Legal Officer, email address: legal@akebia.com or such other email address or address as the Company
may specify for such purposes by notice to the Holder with a copy (which shall not constitute notice) to Latham & Watkins LLP,
200  Clarendon  Street,  Boston,  MA  02116,  Attention:  Wesley  C.  Holmes,  email  address:  Wesley.Holmes@LW.com.  Any  and  all
notices  or  other  communications  or  deliveries  to  be  provided  by  the  Company  hereunder  shall  be  in  writing  and  delivered
personally, by email, or sent by a nationally recognized overnight courier service addressed to the Holder at the email address or
address of the Holder appearing on the books of the Company with a copy (which shall not constitute notice) to 1 Boulevard de la
Foire,  1528,  Luxembourg,  Attention:  Sonia  Benhamida,  Guy  Arbib,  Alexander  Babulevich, 
address:
Sonia.Benhamida@blackrock.com, Guy.Arbib@blackrock.com, Alexander.Babulevich@blackr

email 

11

ock.com. Any notice or other communication or deliveries hereunder shall be deemed given and effective on the earliest of (i) the
time of transmission, if such notice or communication is delivered via email at the email address set forth in this Section prior to
5:30  p.m.  (New  York  City  time)  on  any  date,  (ii)  the  next  Trading  Day  after  the  time  of  transmission,  if  such  notice  or
communication is delivered via email at the email address set forth in this Section on a day that is not a Trading Day or later than
5:30 p.m. (New York City time) on any Trading Day, (iii) the second Trading Day following the date of mailing, if sent by U.S.
nationally recognized overnight courier service, or (iv) upon actual receipt by the party to whom such notice is required to be given.
To  the  extent  that  any  notice  provided  by  the  Company  hereunder  constitutes,  or  contains,  material,  non-public  information
regarding the Company or any subsidiaries, the Company shall simultaneously file such notice with the Commission pursuant to a
Current Report on Form 8-K.

i)

Limitation of Liability. No provision hereof, in the absence of any affirmative action by the Holder to exercise this
Warrant  to  purchase  Warrant  Shares,  and  no  enumeration  herein  of  the  rights  or  privileges  of  the  Holder,  shall  give  rise  to  any
liability of the Holder for the purchase price of any Common Stock or as a stockholder of the Company, whether such liability is
asserted by the Company or by creditors of the Company.

j)

Remedies.  The  Holder,  in  addition  to  being  entitled  to  exercise  all  rights  granted  by  law,  including  recovery  of
damages,  will  be  entitled  to  specific  performance  of  its  rights  under  this  Warrant.  The  Company  agrees  that  monetary  damages
would not be adequate compensation for any loss incurred by reason of a breach by it of the provisions of this Warrant and hereby
agrees to waive and not to assert the defense in any action for specific performance that a remedy at law would be adequate.

k)

Successors and Assigns. Subject to applicable securities laws, this Warrant and the rights and obligations evidenced
hereby shall inure to the benefit of and be binding upon the successors and permitted assigns of the Company and the successors
and permitted assigns of Holder. The provisions of this Warrant are intended to be for the benefit of any Holder from time to time of
this Warrant and shall be enforceable by such Holder.

l)

Amendment. This Warrant may be modified or amended or the provisions hereof waived with the written consent of
the  Company  and  the  holders  of  at  least  a  majority  of  the  Common  Stock  issuable  upon  the  exercise  of  the  then  outstanding
Warrants  (determined  without  giving  effect  to  Section  2(e)  of  the  Warrants);  provided  such  modification,  amendment  or  waiver
applies to all of the then outstanding Warrants.

m)

Severability. Wherever possible, each provision of this Warrant shall be interpreted in such manner as to be effective
and  valid  under  applicable  law,  but  if  any  provision  of  this  Warrant  shall  be  prohibited  by  or  invalid  under  applicable  law,  such
provision shall be ineffective to the extent of such prohibition or invalidity, without invalidating the remainder of such provisions or
the remaining provisions of this Warrant.

n)

Headings.  The  headings  used  in  this  Warrant  are  for  the  convenience  of  reference  only  and  shall  not,  for  any

purpose, be deemed a part of this Warrant.

o)

Electronic  Signatures.  Electronically  scanned  and  transmitted  signatures,  including  by  email  attachment,  shall  be

deemed originals for all purposes of this Warrant.

p) Withholding. The Company shall be entitled to deduct and withhold, or cause to be deducted and withheld, taxes on
all  payments  and  distributions  (or  deemed  distributions)  with  respect  to  this  Warrant  (or  upon  the  exercise  thereof)  to  the  extent
required  by  applicable  law;  provided,  however,  prior  to  deducting  or  withholding  any  such  amounts,  the  Company  shall  use
commercially reasonable efforts to inform the Holder in writing of its intent to withhold or deduct such amounts and to cooperate
with the Holder to reduce or eliminate the requirement to withhold or deduct such amounts. To the extent that any amounts are so
deducted or withheld, such amounts shall be treated for all purposes of this Warrant as having been paid to the Person in respect of
which  such  deduction  or  withholding  was  made.  In  the  event  the  Company  previously  remitted  any  amounts  to  a  governmental
authority on account of taxes required to be deducted or withheld in respect of any payment or distribution (or deemed distribution)
with respect to this Warrant or upon the exercise thereof, the Company shall be

12

 
entitled  (i)  to  offset  any  such  amounts  against  any  amounts  otherwise  payable  in  respect  of  this  Warrant,  any  Warrant  Shares
otherwise required to be issued upon the exercise of this Warrant or any amounts otherwise payable in respect of Warrant Shares
received upon the exercise of this Warrant, or (ii) to require the Person in respect of whom such deduction or withholding was made
to reimburse the Company for such amounts (and such Person shall promptly so reimburse the Company upon demand).

(Remainder of page left blank | Signature page follows)

13

IN WITNESS WHEREOF, the Company has caused this Warrant to be executed by its officer thereunto duly authorized as of the

date first above indicated.

AKEBIA THERAPEUTICS, INC.

By:____________________________________
  Name:
  Title:

14

    
 
    
TO:    AKEBIA THERAPEUTICS, INC.

NOTICE OF EXERCISE

(1)

The undersigned hereby elects to purchase ________ Warrant Shares of the Company pursuant to the terms of the attached
Warrant (only if exercised in full), and tenders herewith payment of the exercise price in full, together with all applicable transfer taxes, if
any.

Annex A

(2)

Payment shall take the form of (check applicable box):

in lawful money of the United States; or
if permitted the cancellation of such number of Warrant Shares as is necessary, in accordance with
the formula set forth in subsection 2(c), to exercise this Warrant with respect to the maximum
number of Warrant Shares purchasable pursuant to the cashless exercise procedure set forth in
subsection 2(c).

(3)

Please issue said Warrant Shares in the name of the undersigned or in such other name as is specified below:

            _______________________________

The Warrant Shares shall be delivered to the following DWAC Account Number:

            _______________________________

            _______________________________

            _______________________________

[SIGNATURE OF HOLDER]

Name of Investing Entity: ________________________________________________________________________
Signature of Authorized Signatory of Investing Entity: _________________________________________________
Name of Authorized Signatory: ___________________________________________________________________
Title of Authorized Signatory: ____________________________________________________________________
Date: ________________________________________________________________________________________

            
            
            
            
    
    
ASSIGNMENT FORM

(To assign the foregoing Warrant, execute this form and supply required information. Do not use this form to exercise the Warrant to

purchase shares.)

FOR VALUE RECEIVED, the foregoing Warrant to purchase shares of Akebia Therapeutics, Inc., a Delaware corporation, and all

rights evidenced thereby are hereby assigned to

Annex B

Name:

Address:

Phone Number:

Email Address:

Dated: _______________ __, ______
Holder’s Signature:
Holder’s Address:

(Please Print)

(Please Print)

______________________________________

______________________________________

 
    
Exhibit 10.21

AKEBIA THERAPEUTICS, INC.
THIRD AMENDED AND RESTATED NON-EMPLOYEE
DIRECTOR COMPENSATION PROGRAM

Effective January 1, 2024

Non-employee members of the Board of Directors (the “Board”) of Akebia Therapeutics, Inc. (the “Company”)  shall
be  eligible  to  receive  cash  and  equity  compensation  as  set  forth  in  this  Third  Amended  and  Restated  Non-Employee  Director
Compensation Program (this “Program”).  The cash and equity compensation described in this Program shall be paid or be made,
as applicable, automatically and without further action of the Board, to each member of the Board who is not an employee of the
Company or any parent or subsidiary of the Company (each, a “Non-Employee Director”) who is eligible to receive such cash or
equity compensation, unless such Non-Employee Director declines the receipt of such cash or equity compensation by written
notice to the Company.  This Program shall remain in effect until it is revised or rescinded by further action of the Board.  This
Program shall be reviewed by the Board periodically and may be amended, modified or terminated by the Board at any time in its
sole discretion and nothing herein should be construed as a guarantee to any Non-Employee Director of any particular level of
cash  or  equity  compensation.  The  terms  and  conditions  of  this  Program  shall  supersede  any  prior  cash  and/or  equity
compensation  arrangements  for  service  as  a  member  of  the  Board  between  the  Company  and  any  of  its  Non-Employee
Directors.  This Program shall become effective on the date set forth above (the “Effective Date”).

1. Cash Compensation.  

for service on the Board, effective as of January 1, 2024.  

(a) Annual Retainers.  Each Non-Employee Director shall be eligible to receive an annual retainer of $50,000

Non-Employee Director shall be eligible to receive the following annual retainers:

(b) Additional Annual Retainers.  In addition to the annual retainer payable pursuant to Section 1(a) above, a

(i) Chairperson of the Board.  A Non-Employee Director serving as Chairperson of the Board shall
be eligible to receive an additional annual retainer of $35,000 for such service; provided, that, in the event that a Non-Employee
Director  is  one  of  two  concurrently  serving  Chairpersons  of  the  Board,  the  additional  annual  retainer  payable  to  such  Non-
Employee Director pursuant to this Section 1(b)(i) shall be $17,500.

(ii) Audit Committee. A Non-Employee Director serving as Chairperson of the Audit Committee of
the Board (the “Audit Committee”) shall be eligible to receive an additional annual retainer of $20,000 for such service.  A Non-
Employee Director serving as a member of the Audit Committee (other than the Chairperson of the Audit Committee) shall be
eligible to receive an additional annual retainer of $10,000 for such service.

(iii)  Compensation  Committee.    A  Non-Employee  Director  serving  as  Chairperson  of  the
Compensation  Committee  of  the  Board  (the  “Compensation  Committee”)  shall  be  eligible  to  receive  an  additional  annual
retainer of $15,000 for such service.  A Non-Employee Director serving as a member of the Compensation Committee (other than
the  Chairperson  of  the  Compensation  Committee)  shall  be  eligible  to  receive  an  additional  annual  retainer  of  $7,500  for  such
service.

 
Exhibit 10.21

(iv)  Nominating  and  Corporate  Governance  Committee.  A  Non-Employee  Director  serving  as
Chairperson of the Nominating and Corporate Governance Committee of the Board (the “NCG Committee”) shall be eligible to
receive an additional annual retainer of $10,000 for such service.  A Non-Employee Director serving as a member of the NCG
Committee  (other  than  the  Chairperson  of  the  NCG  Committee)  shall  be  eligible  to  receive  an  additional  annual  retainer  of
$5,000 for such service.

(v)  Research  and  Development  Committee.  A  Non-Employee  Director  serving  as  Chairperson  of
the Research and Development Committee of the Board (the “R&D Committee”) shall be eligible to receive an additional annual
retainer  of  $10,000  for  such  service.   A  Non-Employee  Director  serving  as  a  member  of  the  R&D  Committee  (other  than  the
Chairperson of the R&D Committee) shall be eligible to receive an additional annual retainer of $5,000 for such service.

(c)  Payment  of  Retainers.    The  annual  retainers  described  in  Sections  1(a)  and  1(b)  shall  be  earned  on  a
quarterly basis based on a calendar quarter and shall be paid in cash by the Company in arrears not later than the fifteenth day
following the end of each calendar quarter.  In the event a Non-Employee Director does not serve as a Non-Employee Director, or
in  the  applicable  positions  described  in  Section  1(b),  for  an  entire  calendar  quarter,  the  retainer  paid  to  such  Non-Employee
Director  shall  be  prorated  for  the  portion  of  such  calendar  quarter  actually  served  as  a  Non-Employee  Director,  or  in  such
position, as applicable.

2. Equity Compensation.  Non-Employee Directors shall be granted the equity awards described below.  Each award
described below shall be granted under and shall be subject to the terms and provisions of the Company’s 2023 Stock Incentive
Plan, as amended, or any other successor Company equity incentive plan under which awards are permitted to be made to Non-
Employee  Directors  (the  “Equity  Plan”)  and  (i)  for  option  awards,  a  non-qualified  stock  option  award  agreement,  including
attached exhibits, in substantially the form of award agreement applicable to Non-Employee Directors most recently approved by
the  Board  and/or  the  Compensation  Committee,  as  applicable,  and  (ii)  for  restricted  stock  unit  awards,  a  restricted  stock  unit
award  agreement,  including  attached  exhibits,  in  substantially  the  form  of  award  agreement  applicable  to  Non-Employee
Directors most recently approved by the Board and/or the Compensation Committee, as applicable.  All applicable terms of the
Equity Plan apply to this Program as if fully set forth herein.  For the avoidance of doubt, if there is any conflict between the
terms of the Equity Plan (including the applicable award agreements thereunder) and this Program, the Equity Plan (including the
applicable award agreements thereunder) shall control.  

(a) Initial Awards.  Each Non-Employee Director who is initially elected or appointed to the Board after the
Effective  Date  shall  be  eligible  to  receive,  on  the  date  of  such  initial  election  or  appointment,  an  option  to  purchase  180,000
shares  of  the  Company’s  common  stock  (subject  to  adjustment  as  provided  in  the  Equity  Plan).   The  awards  described  in  this
Section 2(a) shall be referred to as “Initial Awards.”  No Non-Employee Director shall be granted more than one Initial Award.  

(b) Subsequent Awards.   A  Non-Employee  Director  who  (i)  has  been  serving  on  the  Board  for  at  least  six
months as of the date of any annual meeting of the Company’s stockholders after the Effective Date and (ii) will continue to serve
as  a  Non-Employee  Director  immediately  following  such  meeting,  shall  be  automatically  granted,  on  the  date  of  such  annual
meeting, an option to purchase 45,000 shares of the Company’s common stock (subject to adjustment as provided in the Equity
Plan) and 30,000 restricted stock units of the Company.  The option awards described in this Section 2(b) shall be referred to as
“Subsequent Options”, the restricted stock unit awards described in this Section 2(b) shall be referred to as “Subsequent RSUs”,
and the Subsequent Options and Subsequent RSUs shall together be

Exhibit 10.21

referred to as the “Subsequent Awards.” For the avoidance of doubt, a Non-Employee Director elected for the first time to the
Board at an annual meeting of the Company’s stockholders shall only receive an Initial Award in connection with such election,
and shall not receive any Subsequent Awards on the date of such meeting as well.  

(c)  Termination  of  Service  of  Employee  Directors.    Members  of  the  Board  who  are  employees  of  the
Company or any parent or subsidiary of the Company who subsequently terminate their service with the Company and any parent
or subsidiary of the Company and remain on the Board will not receive an Initial Award pursuant to Section 2(a) above, but to the
extent that they are otherwise eligible, will be eligible to receive, after termination from service with the Company and any parent
or subsidiary of the Company, Subsequent Awards as described in Section 2(b) above.  

(d) Terms of Awards Granted to Non-Employee Directors.

(i) Purchase Price.  The per share exercise price of each option granted to a Non-Employee Director
shall equal the fair market value (as determined pursuant to the Equity Plan) of a share of the Company’s common stock on the
date the option is granted.

(ii) Vesting.  Each Initial Award shall vest and become exercisable in accordance with the following
schedule,  subject  to  the  Non-Employee  Director  remaining  in  continuous  employment  or  other  service  relationship  with  the
Company (“Service”) through each such vesting date:  33 1/3% of the Initial Award shall vest on the one-year anniversary of the
date of grant and 66 2/3% shall vest ratably on the first day of each calendar quarter between the one-year anniversary of the date
of grant and the third anniversary of the date of grant.   Each Subsequent Option shall vest and become exercisable in full on the
first anniversary of the date of grant (or, if earlier, immediately prior to the first annual meeting of the Company’s stockholders
occurring after the date of grant), subject to the Non-Employee Director remaining in continuous Service through such vesting
date.  Each Subsequent RSU shall vest in full on the first anniversary of the date of grant (or, if earlier, immediately prior to the
first  annual  meeting  of  the  Company’s  stockholders  occurring  after  the  date  of  grant),  subject  to  the  Non-Employee  Director
remaining in continuous Service through such vesting date. Each Initial Award and Subsequent Award that is then-outstanding
shall  vest  and  become  exercisable  in  full  upon  a  change  in  control  of  the  Company  or  termination  of  the  Non-Employee
Director’s  Service  due  to  the  Non-Employee  Director’s  death  or  Disability.    For  purposes  of  the  Program,  “Disability”  means
Executive’s inability by reason of physical or mental impairment to perform his/her job duties for a period exceeding twelve (12)
consecutive weeks.  

from the date the option is granted.

(iii) Term.    The  term  of  each  option  granted  to  a  Non-Employee  Director  shall  be  ten  (10)  years

3.  Non-Employee  Director  Compensation  Limit.  Notwithstanding  anything  herein  to  the  contrary,  the  cash
compensation  and  equity  compensation  that  each  Non-Employee  Director  is  entitled  to  receive  under  this  Program  shall  be
subject to any limits set forth in the applicable Equity Plan with respect to limits on awards to Non-Employee Directors.

4. Reimbursements.  The Company shall reimburse each Non-Employee Director for all reasonable, documented, out-
of-pocket  travel  and  other  business  expenses  incurred  by  such  Non-Employee  Director  in  the  performance  of  such  Non-
Employee Director’s duties to the Company in accordance with the Company’s applicable expense reimbursement policies and
procedures, as in effect from time to time.  To the extent that any reimbursement under this Program provides for a deferral of
compensation under Section 409A of the Internal Revenue Code of 1986, as amended: (a) the amount eligible for reimbursement
in one calendar year may not affect the amount eligible for reimbursement in any other calendar year; (b) the right to

 
 
Exhibit 10.21

reimbursement is not subject to liquidation or exchange for another benefit; and (c) any such reimbursement of an expense must
be made on or before the last day of the calendar year following the calendar year in which the expense was incurred.

EXECUTIVE SEVERANCE AGREEMENT

Exhibit 10.43

This EXECUTIVE SEVERANCE AGREEMENT (the “Agreement”) is entered into by and between Akebia Therapeutics, Inc., a
Delaware corporation (“Akebia” or the “Company”), and _________________, a resident of _________________________________ (the
“Executive”), and is effective as of ____________ (the “Effective Date”).

WHEREAS, Executive is a valued employee of the Company; and

WHEREAS, the Company desires to provide certain severance benefits to Executive according to, and contingent upon, the terms and

conditions stated herein (the “Severance Benefits”).

NOW, THEREFORE,  in  consideration  of  the  foregoing  and  the  mutual  promises  contained  herein,  and  of  other  good  and  valuable
consideration, including the compensation to be received by Executive from the Company from time to time, the receipt and sufficiency of
which are hereby acknowledged, the parties hereto, intending legally to be bound, hereby agree as follows:

1.    Definitions.

(a)    Cause. For  purposes  of  this  Agreement,  and  in  each  case  as  determined  by  the  Compensation  Committee  of  the  Company’s

Board of Directors (the “Compensation Committee”) in its sole and reasonable discretion, the following will constitute “Cause”:

(i)    indictment or conviction for either any felony offense or any other crime involving dishonesty;

of its subsidiaries;

(ii)    participation in any fraud, theft, embezzlement or other misconduct or act of dishonesty involving the Company or any

(iii)     intentional damage to any property of the Company or any of its subsidiaries;

(iv)     breach of the holder’s duties of good faith and fair dealing that are owed to the Company or any of its subsidiaries;

limitation, any employment, confidentiality, non-competition, non-solicitation or assignment of inventions agreement;

(v)     breach or violation of any agreement between Executive and the Company or any of its subsidiaries, including, without

to serve;

(vi)     conduct which in the good faith and reasonable determination of the Board of Directors demonstrates gross unfitness

Company that have been approved by the Board of Directors or its authorized delegate,

(vii)     failure to comply with the code of conduct of the Company or any of its subsidiaries or any other policies of the

President of the Company; or

(viii)     insubordination or failure to follow the directions of the Board of Directors or of the Chief Executive Officer or

Company or any of its subsidiaries.

(ix)     any other conduct by Executive that could be expected to be harmful to the business, interests or reputation of the

Executive shall have thirty (30) days after notice from the Company to cure the deficiency leading to the Cause determination (except with
respect to Sections 1(a)(i) and 1(a)(ii) above, for which no notice is required) if, in the sole and reasonable discretion of the Compensation
Committee, such deficiency is curable.

     1     

 
(b)    Good Reason. For purposes of this Agreement the following will constitute “Good Reason” for Executive to terminate his/her
employment with the Company. For the avoidance of doubt, Executive shall not be considered to have terminated his/her employment for
Good Reason unless Executive has (A) reasonably determined in good faith that a Good Reason condition has occurred; (B) not consented to
the occurrence that s/he alleges constitutes Good Reason; (C) given the Company written Notice of Termination for Good Reason not more
than sixty (60) days after the initial existence of the alleged condition giving rise to Good Reason; (D) given the Company at least thirty (30)
days after receipt of such notice to cure the alleged deficiency; and (E) terminated his/her employment within sixty (60) days following the
Company’s receipt of such notice:

(i)

a material reduction in the nature or status of Executive’s responsibilities, authority, position or duties (unless arising
directly or indirectly in connection with a documented and significant performance issue in Executive’s then-current position, as determined
by  the  Compensation  Committee  in  its  sole  and  reasonable  discretion).  Notwithstanding  the  foregoing,  neither  of  the  following  shall
constitute Good Reason: (A) a reassignment of Executive to a position within the Company of substantially equivalent level or status with
respect to Executive’s responsibilities and duties existing immediately prior to such reassignment, or (B) a change in reporting structure;

a material adverse reduction in the amount of aggregate cash compensation provided to Executive or failure by the
Company to pay such compensation, except where such reduction occurs contemporaneously with the implementation of a firm-wide cost-
reduction program affecting comparable executives (a “Reduction Program”);

(ii)

(iii)

the failure by the Company to continue in effect any incentive compensation plan in which Executive participates,
unless  an  equitable  alternative  compensation  arrangement  has  been  provided,  except  that  to  the  extent  that  participation  in  such  plans  has
been  reduced  or  eliminated  for  all  other  eligible  executives,  in  which  case  the  failure  to  continue  Executive  in  any  such  plan  shall  not
constitute Good Reason; or

Massachusetts; provided, that Executive primarily provides services in Cambridge at the time of such establishment.

(iv)

establishment of the Company’s primary operations in any place beyond a fifty (50) mile radius of Cambridge,

In all respects, the definition of Good Reason shall be interpreted to comply with Code Section 409A, and any successor statute, regulation
and guidance thereto.

(c)        Change  in  Control. For  purposes  of  this  Agreement,  a  “Change  in  Control”  means  the  occurrence  of  any  of  the  following

events other than in connection with the consummation of an initial public offering of the Company’s securities:

(i)    any “person” (as such term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended)
who is not a shareholder of the Company as of the date of this Agreement or an affiliate thereof is or becomes the “beneficial owner” (as
defined in Rule 13d-3 under said Act), directly or indirectly, of securities of the Company representing 50% or more of the total voting power
represented by the Company’s then outstanding voting securities;

(ii)    a change in the composition of the Board occurring within a two-year period, as a result of which less than a majority
of the directors are Incumbent Directors. “Incumbent Directors” will mean directors who either (A) are directors of the Company as of the
date hereof, or (B) are elected, or nominated for election, to the Board with the affirmative votes of at least a majority of the remaining
Incumbent Directors at the time of such election or nomination (but will not include an individual whose election or nomination is in
connection with an actual or threatened proxy contest relating to the election of directors to the Company);

(iii)    the date of the consummation of a merger, scheme of arrangement or consolidation of the Company with any other

corporation that has been approved by the stockholders of the Company, other than a merger, scheme of arrangement or consolidation which
would result in the

    2

voting securities of the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being
converted into voting securities of the surviving entity) more than fifty percent (50%) of the total voting power represented by the voting
securities of the Company or such surviving entity outstanding immediately after such merger or consolidation; or

assets.

(iv)    the date of the consummation of the sale or disposition by the Company of all or substantially all the Company’s

Notwithstanding the foregoing, a transaction will not constitute a Change in Control if: (a) its sole purpose is to change the domicile of the
Company’s incorporation; or (b) its sole purpose is to create a holding company that will be owned in substantially the same proportions by
the persons who held the Company’s securities immediately before such transaction.

In  all  respects,  the  definition  of  Change  in  Control  shall  be  interpreted  to  comply  with  Code  Section  409A,  and  any  successor  statute,
regulation and guidance thereto.

(d)    Notice of Termination. For purposes of this Agreement, a “Notice of Termination” means a notice which, if applicable, sets

forth the specific “cause” or “good reason” provision of this Section 1 and sets forth the effective date of termination.

(e)        Disability.  For  purposes  of  this  Agreement,  “Disability”  means  Executive’s  inability  by  reason  of  physical  or  mental

impairment to perform his/her job duties for a period exceeding twelve (12) consecutive weeks.

2.        Termination  of  Agreement.  This  Agreement  will  terminate  automatically  upon  (a)  Executive’s  termination  for  Cause;  (b)
mutual  agreement  between  the  Company  and  Executive;  (c)  Executive’s  death,  or  (d)  Executive’s  Disability.  Upon  termination  of  this
Agreement, Executive or his/her heirs or estate (as applicable) only will be entitled to payments required by law or agreement and benefits
afforded under the Company’s employee benefit plans existing at the time of termination and in which the Executive participates.

3.    Severance Benefits Upon Termination of Executive’s Employment. If Executive’s employment is terminated, then s/he may

be entitled to certain monetary and non-monetary compensation and benefits as set forth below (the “Severance Benefits”):

(a)        Termination  by  the  Company  for  Cause;  Executive’s  Death  or  Disability.  If  Executive’s  employment  is  terminated  by  the
Company for Cause or on account of the Executive’s Disability, or if Executive’s employment is terminated due to the Executive’s death,
then the Company shall pay Executive all amounts earned or accrued but not paid as of the effective date of such termination, including (i)
Executive’s  then-current  base  salary;  (ii)  legitimate  business  expenses  incurred  by  Executive  in  the  performance  of  his/her  duties  to  the
Company  in  accordance  with  the  Company’s  normal  policies  and  practices;  (iii)  vacation  pay  in  accordance  with  applicable  law  and  the
Company’s normal policies and practices; and (iv) any earned or accrued bonus or incentive compensation with respect to the calendar year
ended prior to the year in which the termination became effective (collectively, “Accrued Compensation”).

(b)    Termination by Executive without Good Reason. If Executive terminates his/her employment without Good Reason, then the
Company  will  pay  Executive  all  Accrued  Compensation  earned  through  the  date  of  such  resignation.  Nothing  herein  shall  prohibit  the
Company, in its discretion, from effectuating Executive’s resignation sooner than the date set forth in Executive’s Notice of Termination.

(c)        Termination  by  the  Company  without  Cause  or  by  Executive  for  Good  Reason  (No  Change  in  Control).  If  Executive’s
employment  is  terminated  by  the  Company  without  Cause  or  by  the  Executive  for  Good  Reason  where  there  has  not  been  a  Change  in
Control, and provided that the Executive has satisfied all conditions precedent as set forth herein, then the Company shall:

(i)    pay Executive all Accrued Compensation;

    3

(ii)    continue paying Executive’s then-base salary for a period of twelve (12) months payable in accordance with the normal
payroll practices of the Company for its executives generally, with the first such payment to be made on the first payroll date that occurs after
the  day  that  is  sixty  (60)  days  after  the  date  of  termination,  retroactive  to  the  date  of  Executive’s  termination,  or  such  other  method  of
payment as determined by the Company; and

(iii)    provided that Executive appropriately and timely completes all required elections, the Company shall reimburse (on a
taxable basis) premiums paid by Executive for health and dental insurance premiums (for himself/herself and all eligible dependents) under
the Consolidated Omnibus Budget Reconciliation Act (“COBRA”) at the same amount and to the same extent it would if Executive still was
employed by the Company until the earliest of (A) the last day of the month which falls twelve (12) months from the date of Executive’s
termination (or such other period as required by applicable law); (B) the date that Executive and eligible dependents are no longer eligible to
receive continuation coverage under COBRA; or (C) the date Executive becomes eligible to receive health or dental care coverage pursuant
to the health or dental care plan of a new employer.

In  the  event  that  the  Company  terminates  Executive’s  employment  without  Cause  as  set  forth  in  this  Section  3(c),  but  the  Company
determines within one (1) year of such termination that the Company had the right to terminate Executive’s employment for Cause pursuant
to Sections 1(a) and 3(a) above, the Company may terminate the payment of any amounts still owed to Executive pursuant to this Section
3(c).

(d)    Termination by the Company without Cause or by Executive for Good Reason (Change in Control). If Executive’s employment
is terminated by the Company without Cause or by Executive for Good Reason, and provided that such termination occurs within twelve (12)
months after the occurrence of such qualifying event giving rise to the Change in Control; then the Company shall:

(i)    pay Executive all Accrued Compensation;

(ii)    continue paying Executive’s then-base salary for a period of twelve (12) months payable in accordance with the normal
payroll practices of the Company for its executives generally, with the first such payment to be made on the first payroll date that occurs after
the  day  that  is  sixty  (60)  days  after  the  date  of  termination,  retroactive  to  the  date  of  Executive’s  termination,  or  such  other  method  of
payment as determined by the Company;

(iii)        pay  Executive  an  amount  equal  to  fifty  percent  (50%)  of  his/her  annual  target  bonus  for  the  year  in  which  the
termination occurs, pro-rated to reflect the month in which the termination occurs, such amount to be payable in a lump-sum on the date that
is the day that is sixty (60) days after the date of termination; and

(iv)    provided that Executive appropriately and timely completes all required elections, the Company shall reimburse (on a
taxable basis) premiums paid by Executive for health and dental insurance premiums (for himself/herself and all eligible dependents) under
COBRA at the same amount and to the same extent it would if Executive still was employed by the Company until the earliest of (A) the last
day of the month which falls twelve (12) months from the date of Executive’s termination (or such other period as required by applicable
law); (B) the date that Executive and eligible dependents are no longer eligible to receive continuation coverage under COBRA; or (C) the
date Executive becomes eligible to receive health or dental care coverage pursuant to the health or dental care plan of a new employer.

In  the  event  that  the  Company  terminates  Executive’s  employment  without  Cause  as  set  forth  in  this  Section  3(d),  but  the  Company
determines within one (1) year of such termination that the Company had the right to terminate Executive’s employment for Cause pursuant
to Sections 1(a) and 3(a) above, the Company may terminate the payment of any amounts still owed to Executive pursuant to this Section
3(d).

(e)        Notice  of  Termination  Required. Any  purported  termination  by  the  Company  or  by  Executive  must  be  communicated  by  a

written Notice of Termination to the other party. For purposes of

    4

 
this Agreement, no purported termination of employment will be effective without a Notice of Termination.

(f)    Timing of Payments. The Accrued Compensation payable to Executive as provided in this Section 3 will be paid pursuant to
applicable  state  law  or  within  ten  (10)  business  days  after  the  effective  date  of  Executive’s  employment  termination,  whichever  period  is
shorter. Any other compensation provided for in this Section 3 will be paid as set forth above, subject to Section 9 below.

    (g)    Payroll Taxes and Withholdings. All Severance Benefits provided for in this Section 3 shall, to the extent required, be subject to
ordinary and required payroll taxes, deductions and income tax withholding.

(h)    Reemployment. If Executive becomes reemployed by the Company prior to the end of the period in which Executive is entitled
to  receive  Severance  Benefits,  Executive  will  no  longer  be  entitled  to  receive  such  Severance  Benefits  (except  for  any  Accrued
Compensation) as of the effective date of such reemployment.

(i)    Benefit Plans. Executive’s entitlement to any other compensation or benefits upon termination of his/her employment shall be

determined in accordance with the Company’s employee benefit plans and other applicable programs and practices then in effect.

        4.        Conditions  Precedent  to  Receipt  of  Severance  Benefits. Executive  shall  not  be  entitled  to  receive  (or  continue  to  receive)  any
Severance  Benefits,  except  for  Accrued  Compensation,  and  shall  not  be  entitled  to  any  continued  vesting  of  outstanding  equity  awards
pursuant to Section 5(b) below unless:

(a)    Executive executes (prior to the deadline established by the Company), does not revoke and complies with a general release of

all claims against the Company and its officers, directors and employees upon terms and in a form reasonably acceptable to the Company;

(b)     Executive executes (and does not rescind such acceptance within seven (7) business days after such execution) and complies
fully  with  a  new  agreement  to  be  entered  into  between  Executive  and  the  Company  containing  post-termination  restrictive  covenants
(including, without limitation, covenants of non-disclosure, non-solicitation and non-competition, and covenants regarding the assignment of
intellectual  property)  with  the  same  scope,  duration  and  conditions  as  any  post-termination  restrictive  covenants  previously  agreed  to
between Executive and the Company at any time during Executive’s employment with the Company; and

(c)    Executive complies fully with Section 7 hereof.

5.    Accelerated Vesting of Equity.

(a)        Upon  a  Change  in  Control.  One  hundred  percent  (100%)  of  Executive’s  outstanding  unvested  options,  restricted  shares,
restricted stock units or other equity-based awards shall immediately vest upon a Change in Control. The exercisability of stock options (or
other awards requiring exercise) shall be extended, to the extent feasible and to the extent consistent with applicable law and the terms of the
Company’s equity plans or programs (each, as in effect from time to time, a “Company Equity Plan” and, together, the “Company Equity
Plans”) and the award agreements issued thereunder, beyond any lockup or similar restrictive period set forth in any documents executed in
connection with a Change in Control. The Compensation Committee may determine in its reasonable discretion whether it is advisable or
feasible to amend a Company Equity Plan or Plans and/or any equity agreements issued thereunder between the Company and Executive in
order to effect the extended period of exercise contemplated by this Section 5(a). For the avoidance of doubt, no amendment shall be made by
the Compensation Committee in furtherance of this Section 5(a) other than in accordance with Section 409A of Internal Revenue Code of
1986, as amended (the “Code”) and the regulations and guidance issued thereunder.

(b)          Upon  Termination  by  the  Company  without  Cause  or  by  Executive  for  Good  Reason.  Executive’s  outstanding  unvested
options, restricted shares, restricted stock units or other equity-based awards shall remain outstanding and continue to vest in accordance with
the terms of the applicable equity agreement(s) for the period of time during which Executive continues to receive Severance

    5

Benefits, as if he or she remained employed during such time, in accordance with Section 3(c)(ii) hereof. The Compensation Committee may
determine  in  its  reasonable  discretion  whether  it  is  advisable  or  feasible  to  amend  a  Company  Equity  Plan  or  Plans  and/or  any  equity
agreements issued thereunder existing between the Company and Executive in order to effect the extended period of vesting contemplated by
this Section 5(b). For the avoidance of doubt, no amendment shall be made by the Compensation Committee in furtherance of this Section
5(b) other than in accordance with Code Section 409A and the regulations and guidance issued thereunder.

    6.    Cooperation. During employment and after the termination of Executive’s employment for any reason, Executive agrees to cooperate
with,  and  at  the  request  of,  the  Company  in  the  defense  or  prosecution  of  any  legal  matter  or  claim  in  which  the  Company,  any  of  its
affiliates, or any of their past or present employees, agents, officers, directors, attorneys, successors or assigns, may be or become involved
and which arises or arose during Executive’s employment, to the extent such cooperation does not unreasonably interfere with Executive’s
personal or professional schedule. Executive will be reimbursed for any reasonable out-of-pocket expenses incurred thereby.

        7.        Non-Disparagement.  Executive  agrees  that  during  his/her  employment  and  for  the  greater  of  (A)  one  (1)  year  following  the
termination of his/her employment (regardless of the reason for termination) or (B) the period during which Executive receives Severance
Benefits hereunder, Executive will not make any statements that are disparaging about or adverse to the business interests of the Company or
which are intended to harm the reputation of the Company including, but not limited to, any statements that disparage any product, service,
finances, employees, officers, directors, capabilities or any other aspect of the Company’s business, products or services.

    8.    Successors and Assigns.

(a)        Assignment  by  Company.  The  Company  may,  without  the  consent  of  Executive,  assign  this  Agreement  or  delegate  its
obligations hereunder to any firm, entity, company or person (collectively, a “Person”) in the event that the Company shall hereafter effect a
reorganization, consolidate with, or merge into, such Person or transfer all or substantially all of its properties or assets to such Person.

(b)        Assignment  by  Executive.  Neither  this  Agreement  nor  any  right  or  interest  hereunder  will  be  assignable  or  transferable  by
Executive, his/her beneficiaries or legal representatives, except by will or by the laws of descent and distribution. All payments under this
Agreement will inure to the benefit of and be enforceable by Executive’s legal personal representative(s).

9.    Tax Consequences.

(a)        The  Company  does  not  guarantee  the  tax  treatment  or  tax  consequences  associated  with  Severance  Benefits  received  by

Executive hereunder.

(b)    Parachute Payments. To the extent consistent with applicable law, the payment of any amounts or the provision of any benefits
under this Agreement including, without limitation, the payment of Severance Benefits pursuant to Section 3 above or the accelerated vesting
of equity pursuant to Section 5 above, will be reduced or adjusted to avoid triggering the excise tax imposed by Section 4999 of the Code, if
such adjustment would result in the provision of a greater total benefit, on a net after-tax basis (after taking into account taking any applicable
federal, state and local income taxes and the excise tax imposed by Section 4999), to Executive.

(c)    Section 409A. The provisions of this Agreement are intended to comply with the requirements of Code Section 409A or with
the  conditions  for  an  exemption  from  such  requirements,  and  shall  be  construed  accordingly.    Notwithstanding  any  provision  of  this
Agreement  to  the  contrary,  if  at  the  time  of  Executive’s  separation  from  service  (as  defined  below)  Executive  is  a  specified  employee  (as
defined below), as determined by the Company, any and all amounts payable in connection with such separation from service that constitute
deferred compensation subject to Code Section 409A, as determined by the Company, and that would otherwise be payable within six (6)
months following such separation from service, shall instead be paid on the date that follows the date of such separation from service by six
(6) months (or, if earlier, upon the Executive’s death). For purposes of this Agreement, all references to “termination of employment” and
correlative phrases shall be construed to require a “separation from service” (as defined in Section 1.409A-1(h) of the Treasury regulations
after giving

    6

effect to the presumptions contained therein), and the term “specified employee” means an individual determined by the Company to be a
specified employee under Treasury regulation Section 1.409A-1(i).

Each payment made under this Agreement shall be treated as a separate payment and the right to a series of installment payments

under this Agreement is to be treated as a right to a series of separate payments.

Any reimbursement for expenses that would constitute nonqualified deferred compensation subject to Section 409A shall be subject
to  the  following  additional  rules:  (i)  no  reimbursement  of  any  such  expense  shall  affect  Executive’s  right  to  reimbursement  of  any  such
expense  in  any  other  taxable  year;  (ii)  reimbursement  of  the  expense  shall  be  made,  if  at  all,  promptly,  but  not  later  than  the  end  of  the
calendar  year  following  the  calendar  year  in  which  the  expense  was  incurred;  and  (iii)  the  right  to  reimbursement  shall  not  be  subject  to
liquidation or exchange for any other benefit.

10.    Notices. All notices, requests, demands, and other communications called for hereunder will be in writing and will be deemed
given (a) on the date of delivery if delivered personally, (b) one (1) day after being sent overnight by a well-established commercial overnight
service, or (c) four (4) days after being mailed by registered or certified mail, return receipt requested, prepaid and addressed to the parties or
their successors at the following addresses, or at such other addresses as the parties may later designate in writing:

If to the Company:

Akebia Therapeutics, Inc.
Attention: Chief Legal Officer
245 First Street
Cambridge, Massachusetts 02142

If to Executive:

at the last residential address known by the Company

11.    Non-Exclusivity of Rights. Nothing in this Agreement will prevent or limit Executive’s continuing or future participation in
any  benefit,  bonus,  incentive  or  other  plan  or  program  provided  by  the  Company  or  any  of  its  subsidiaries  and  for  which  Executive  may
qualify, nor will anything herein limit or reduce such rights as Executive may have under any other agreements with the Company or any of
its  subsidiaries.  Amounts  which  are  vested  benefits  or  which  Executive  is  otherwise  entitled  to  receive  under  any  plan  or  program  of  the
Company  or  any  of  its  subsidiaries  will  be  payable  in  accordance  with  such  plan  or  program,  except  as  explicitly  modified  by  this
Agreement.

12.    Amendments. No provision of this Agreement may be modified, waived or discharged unless such waiver, modification or

discharge is agreed to in writing and signed by Executive and the Chief Executive Officer of the Company.

13.    No Waiver. No waiver by either party hereto at any time of any breach by the other party hereto of, or compliance with, any
condition or provision of this Agreement to be performed by such other party will be deemed a waiver of similar or dissimilar provisions or
conditions at the same or at any prior or subsequent time.

14.        Governing  Law.  This  Agreement  will  be  governed  by  and  construed  and  enforced  in  accordance  with  the  laws  of  the

Commonwealth of Massachusetts, without giving effect to the conflict of law principles thereof.

15.        Dispute  Resolution/Jurisdiction/Venue.  Any  dispute  concerning  this  Agreement  shall  be  heard  by  a  court  of  competent
jurisdiction  within  Massachusetts.  The  parties  hereby  acknowledge  that  they  are  subject  to  the  personal  jurisdiction  of  the  Massachusetts
courts in any county where the Company has operations or facilities and/or Executive resides.

    7

16.          Expenses.  To  the  extent  Executive  elects  to  have  independent  legal  counsel  review  and  or  negotiate  the  terms  of  this
Agreement or any release required by this Agreement, Executive shall be solely responsible for all associated costs and fees, including but
not limited to attorneys’ fees.

17.          Severability.  The  provisions  of  this  Agreement  will  be  deemed  severable  and  the  invalidity  or  unenforceability  of  any

provision will not affect the validity or enforceability of the other provisions hereof.

18.    Effect on Other Agreements. The terms of this Agreement replace and supersede the terms in all other and prior agreements
between Executive and the Company that relate to (i) post-separation severance and other post-separation benefits and (ii) equity acceleration
in  connection  with  a  change  of  control,  whether  written  or  oral  or  express  or  implied,  and  no  representations,  promises,  assurances  or
agreements  have  been  made  regarding  the  subject  matter  of  this  Agreement,  except  such  as  has  been  stated  in  this  Agreement.  For  the
avoidance of doubt, (a) the terms of any existing employment agreement or other agreement between Executive and the Company regarding
assignment  of  intellectual  property,  confidentiality  and  non-disclosure,  non-competition  and  non-solicitation  between  Executive  and  the
Company  shall  remain  in  full  force  and  effect  and  (b)  all  other  terms  in  offer  letters,  employment  agreements  or  any  other  agreements
between  Executive  and  the  Company  that  do  not  relate  to  (1)  post-separation  severance  or  other  post-separation  benefits  or  (2)  equity
acceleration in connection with a change of control, will remain in full force and effect.

19.    Clawback Policy. Notwithstanding any other provision of this Agreement, Executive agrees and acknowledges that they are
and remain subject to, and bound by, the terms and conditions of Akebia Therapeutic Inc.’s Compensation Recovery Policy (as it may be
amended, restated, supplemented or otherwise modified from time to time, the “Policy”). In the event it is determined in accordance with the
Policy that any compensation or compensatory award granted, earned or paid to Executive must be forfeited or reimbursed to the Company,
Executive will promptly take any action necessary to effectuate such forfeiture and/or reimbursement as determined by the Company.

THE COMPANY AND EXECUTIVE ACKNOWLEDGE THAT (A) EACH HAS CAREFULLY READ THIS AGREEMENT, (B)
EACH  UNDERSTANDS  ITS  TERMS,  (C)  ALL  UNDERSTANDINGS  AND  AGREEMENTS  BETWEEN  THE  COMPANY  AND
EXECUTIVE  RELATING  TO  THE  SUBJECTS  COVERED  IN  THIS  AGREEMENT  ARE  CONTAINED  IN  IT,  AND  (D)  EACH  HAS
ENTERED INTO THIS AGREEMENT VOLUNTARILY AND NOT IN RELIANCE ON ANY PROMISES OR REPRESENTATIONS BY
THE OTHER, OTHER THAN THOSE CONTAINED IN THIS AGREEMENT ITSELF.

IN WITNESS WHEREOF, the Company has caused this Agreement to be executed by its duly authorized person and Executive has

executed this Agreement effective as of the day and year first above written.

EXECUTIVE

By:

  Name:
  Title:

    8

  AKEBIA THERAPEUTICS, INC.

  By:

  John P. Butler, Chief Executive Officer

 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.44

[Date]

Personal and Confidenal

[First Name Last name]
[Address]

Re: ELT Special Bonus Program

Dear [First Name Last name]:

I am pleased to offer you the opportunity to earn addional bonus payments related to your important work on the vadadustat
program (the “ELT Special Bonus Program”) in recognion of your significant value to Akebia Therapeucs, Inc. (“Akebia” or the
“Company”) and in ancipaon of the important contribuons you will make in the next year and beyond. The purpose of this
leer agreement (the “Agreement”) is to outline the terms and condions associated with the bonus payments (“Bonus
Payments”) offered to you by Akebia. These Bonus Payments are in addion to your annual bonus payment. If you accept the
terms of this Agreement, please return a signed Agreement to [Name] no later than [Date].

1.    Special Bonus Payment. Subject to the terms and condions set forth below, and in recognion of your contribuons to the
vadadustat program to date, the Company will provide you with a lump sum payment of $[●], less all required taxes,
withholdings and deducons, payable within fieen (15) days of the date hereof (the “Special Bonus Payment”).

2.     Retenon Cash Incenve Award. Subject to the terms and condions set forth below and the terms of the Company’s Cash
Incenve Plan, the Company will provide you with the following:

(a)     lump sum payment of $[●], less all required taxes, withholdings and deducons (“Incenve Payment 1”) upon [●]
(“Event 1”), payable within fieen (15) days of Event 1.

(b)    lump sum payment of $[●], less all required taxes, withholdings and deducons (“Incenve Payment 2” and
together with Incenve Payment 1, the “Incenve Payments”) upon [●] (“Event 2”), payable within fieen (15) days of
Event 2.

In order to be eligible for any Incenve Payment, you must remain an employee of the Company in good standing (i.e., meeng
the requirements of your posion) through the date of the corresponding event.

3.     Repayment of Special Bonus Payment Upon Terminaon. If you voluntarily terminate your employment with the Company
within twelve (12) months aer you receive the Special Bonus Payment, then you shall repay $[●] within thirty (30) days aer
the effecve date of such terminaon. Should you become obligated to repay to the Company the Special Bonus Payment as set
forth herein, you hereby authorize the Company to deduct any owed amount from your final, accrued wages (including, without
limitaon, any accrued but unused paid me off). You acknowledge and agree that any such deducons would constute
permissible, valid offsets under the Massachuses

    1

                        
Payment of Wages Act, M.G.L. c. 149 § 148 et seq. You further agree that should your final, accrued wages be insufficient to
sasfy your enre repayment obligaon, you will repay any outstanding amount by personal check. You agree that you will be
responsible for paying the Company’s costs of collecon, if any (including aorneys’ fees and other expenses), should the
Company be required to resort to legal acon to collect any such then-outstanding amount.

4.    Prior Agreements. Upon your acceptance of the terms and condions of this Agreement, the Employee Agreement
(Confidenality, Non-Solicitaon, Non-Compeon and Developments Agreement) last executed by you in connecon with your
employment with Akebia and the Execuve Severance Agreement between you and the Company will remain in full force and
effect in accordance with their terms, and by your signature below are confirmed, rafied and incorporated herein.

5.    At-Will Employment. Nothing in this Agreement should be taken as a guarantee of connued employment, a specific term
of employment and/or a contract of employment, and at all mes you will be expected to meet Company performance
standards and abide by all Company policies and procedures. Your employment remains at will and you and the Company agree
that this Agreement does not in any way modify the at-will nature of your employment by the Company. Accordingly, your
employment, as well as the terms and condions thereof (except for this Agreement), may be modified or terminated with or
without Cause or noce. For purposes of this Agreement, the definion of “Cause” shall be the same definion of “Cause”
included in your Execuve Severance Agreement.

6.    Confidenality. The terms and condions of this Agreement, the existence of the ELT Special Bonus Program, and the Bonus
Payments are strictly confidenal except as required by applicable law. To the extent permied by applicable law, you shall not
discuss or reveal any informaon concerning this Agreement to any past or present employee of the Company or any third
person or enty other than the individual who presented you with this Agreement, an Akebia Human Resources representave,
counsel and members of your immediate family.

7.    Complete Agreement; Miscellaneous. This Agreement, together with the Cash Incenve Plan and the Execuve Severance
Agreement, sets forth the complete agreement between you and the Company with respect to your eligibility for, and the
payment to you of, the Bonus Payments. The provisions of this Agreement will not supersede or modify the provisions of the
Employee Agreement, and nothing herein shall preclude the connued validity of the Employee Agreement which shall remain
in full force and effect. You agree that each provision and the subparts of each provision in this Agreement shall be treated as
separate and independent clauses, and the unenforceability of any one clause shall in no way impair the enforceability of any of
the other clauses of this Agreement. In the event of any dispute, this Agreement will be construed as a whole, will be
interpreted in accordance with its fair meaning, and will not be construed strictly for or against either you or the Company. This
Agreement may not be changed, amended, modified, altered or rescinded except upon the express wrien consent of both you
and an authorized Company officer, subject to the terms of the Cash Incenve Plan, as applicable. Any waiver of any provision of
this Agreement by the Company shall not constute a waiver of any other provision of this Agreement unless the Company
expressly so indicates otherwise. This Agreement shall be governed by and construed in accordance with the laws of the
Commonwealth of Massachuses without regard to conflicts of laws principles thereof. Both pares agree that any dispute
under this Agreement shall be heard by a court of competent jurisdicon within Massachuses. The pares hereby
acknowledge that they are subject to the personal jurisdicon of the

2

Massachuses courts in any county where the Company has operaons or facilies and/or you reside.

8.    Assignment. Except as otherwise provided herein, this Agreement shall be binding upon, inure to the benefit of and be
enforceable by the Company and you and their respecve heirs, legal representaves, successors and assigns. If the Company
shall be merged into or consolidated with another enty, the provisions of this Agreement shall be binding upon and inure to
the benefit of the enty surviving such merger or resulng from such consolidaon.

9.    Clawback Policy. In accepng these payments, you agree and acknowledge that you are subject to, and bound by, the terms
of any clawback policy that the Company has in place or may adopt in the future, including without limitaon Akebia
Therapeuc Inc.’s Compensaon Recovery Policy adopted in accordance with stock exchange lisng requirements. You agree
that in the event it is determined in accordance with any such policy that any compensaon or compensatory award granted,
earned or paid to you including these payments or pursuant to any other compensaon arrangement must be forfeited or
reimbursed to the Company, you will promptly take any acon necessary to effectuate such forfeiture and/or reimbursement as
determined by the Company.

We are pleased to be able to offer you parcipaon in the ELT Special Bonus Program, and we look forward to your connuing
commitment and focus on fulfilling your responsibilies. Please feel free to reach out to me should you have any quesons.

Sincerely,

[First Name, Last name]
[Title]

3

AGREED AND ACCEPTED:

I acknowledge and agree that I have read the foregoing Agreement and the Cash Incenve Plan, have had the opportunity to
consult with counsel and that I have freely and voluntarily entered into this Agreement.

________________________________
[First Name, Last name]
Dated: _______________

4

AKEBIA THERAPEUTICS, INC.
STOCK OPTION AGREEMENT FOR OFFICERS

2023 STOCK INCENTIVE PLAN

Akebia Therapeutics, Inc. (the “Company”) hereby grants the following stock option pursuant to its 2023 Stock Incentive

Plan (the “Plan”). The terms and conditions attached hereto are also a part hereof.

Notice of Grant

Exhibit 10.45

Name of optionee (the “Participant”):
Grant Date:

Incentive Stock Option or Nonstatutory Stock Option:
Number of shares of the Company’s Common Stock subject
to this option (“Shares”):
1
Option exercise price per Share:

Number, if any, of Shares that vest immediately on the grant
date:

Shares that are subject to vesting schedule:

Vesting Start Date:
 2
Final Exercise Date:

Vesting Schedule:

Vesting Date:

Number of Options that Vest:

All vesting is dependent on the Participant remaining an Eligible Participant, as provided herein.

This option satisfies in full all commitments that the Company has to the Participant with respect to the issuance of stock,

stock options or other equity securities.

1
     This must be at least 100% of the Grant Date Fair Market Value (as defined in the Plan) of the Common Stock on the date of grant (110% in the case of
a Participant that owns more than 10% of the total combined voting power of all classes of stock of the Company or its parent or subsidiary (a “10%
Shareholder”) when the option is intended to qualify as an incentive stock option (an “ISO”) under Section 422 of the Internal Revenue Code).
2
    The Final Exercise Date must be no more than 10 years (5 years in the case of a 10% Shareholder for an option intended to qualify as an ISO) from the
date of grant. The correct approach to calculate the final exercise date is to use the day immediately prior to the date ten years out from the date of the stock
option award grant (or 5 years, as applicable).

Signature of Participant

Street Address

City/State/Zip Code

Akebia Therapeutics, Inc.

By:                    

Name of Officer
Title:

                    
                    
                    
Akebia Therapeutics, Inc.

Stock Option Agreement for Officers
Incorporated Terms and Conditions

1.

Grant of Option.

This agreement evidences the grant by the Company, on the grant date (the “Grant Date”) set forth in the Notice of Grant

that forms part of this agreement (the “Notice of Grant”), to the Participant of an option to purchase, in whole or in part, on the
terms provided herein and in the Company’s 2023 Stock Incentive Plan (the “Plan”), the number of Shares set forth in the Notice
of Grant of common stock, $0.00001 par value per share, of the Company (“Common Stock”), at the exercise price per Share set
forth in the Notice of Grant. Unless earlier terminated, this option shall expire at 5:00 p.m., Eastern time, on the Final Exercise
Date set forth in the Notice of Grant (the “Final Exercise Date”).

The option evidenced by this agreement is intended to be an incentive stock option as defined in Section 422 of the

Internal Revenue Code of 1986, as amended, and any regulations promulgated thereunder (the “Code”) to the maximum extent
permitted by law, solely to the extent designated as an incentive stock option in the Notice of Grant. Except as otherwise
indicated by the context, the term “Participant”, as used in this option, shall be deemed to include any person who acquires the
right to exercise this option validly under its terms.

2.

Vesting Schedule.

(a)

General. Subject to this Agreement and the terms of any Executive Severance Agreement or other written

agreement between the Participant and the Company, this option will become exercisable (“vest”) in accordance with the vesting
schedule set forth in the Notice of Grant.

(b)

Change in Control.

(1)

Treatment of Option in a Change in Control. The option, to the extent outstanding immediately prior to a

Change in Control but not then vested in full, shall automatically become fully vested and exercisable upon such Change in
Control.

(2)

Definitions.

(i)    “Change in Control” means the occurrence of any of the following events other than in connection
with the consummation of an initial public offering of the Company’s securities: (A) any “person” (as such
term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended) who is not a
shareholder of the Company as of the date of this Agreement or an affiliate thereof is or becomes the
“beneficial owner” (as defined in Rule 13d-3 under said Act), directly or indirectly, of securities of the
Company representing 50% or more of the total voting power represented by the Company’s then
outstanding voting securities; (B) a change in the composition of the Board occurring within a two-year
period, as a result of which less than a majority of the directors are Incumbent Directors; (C) the date of the
consummation of a merger, scheme of arrangement or consolidation of the Company with any other
corporation that has been approved by the stockholders of the Company, other than a merger, scheme of
arrangement or consolidation which would result in the voting securities of the Company outstanding
immediately

prior thereto continuing to represent (either by remaining outstanding or by being converted into voting
securities of the surviving entity) more than fifty percent (50%) of the total voting power represented by
the voting securities of the Company or such surviving entity outstanding immediately after such merger or
consolidation; or (D) the date of the consummation of the sale or disposition by the Company of all or
substantially all the Company’s assets. Notwithstanding the foregoing, a transaction will not constitute a
Change in Control if: (I) its sole purpose is to change the domicile of the Company’s incorporation; or (II)
its sole purpose is to create a holding company that will be owned in substantially the same proportions by
the persons who held the Company’s securities immediately before such transaction. In all respects, the
definition of Change in Control shall be interpreted to comply with Section 409A of the Code, and any
successor statute, regulation and guidance thereto.

“Incumbent Directors” means directors who either (A) are directors of the Company as of the date

(ii)
hereof, or (B) are elected, or nominated for election, to the Board with the affirmative votes of at least a
majority of the remaining Incumbent Directors at the time of such election or nomination (but will not
include an individual whose election or nomination is in connection with an actual or threatened proxy
contest relating to the election of directors to the Company).

(c)

Exercisability. The right of exercise shall be cumulative so that to the extent the option is not exercised in any
period to the maximum extent permissible it shall continue to be exercisable, in whole or in part, with respect to all Shares for
which it is vested until the earlier of the Final Exercise Date or the termination of this option under Section 3 hereof or the Plan.

3.

Exercise of Option.

(a)

Form of Exercise. Each election to exercise this option shall be in writing, in the form of the Stock Option

Exercise Notice attached as Annex A, signed by the Participant, and received by the Company at its principal office,
accompanied by this agreement, or in such other form (which may be electronic) as is approved by the Company, together with
payment in full in the manner provided in the Plan. The Participant may purchase less than the number of shares covered hereby,
provided that no partial exercise of this option may be for any fractional share or for fewer than ten whole shares.

(b)

Continuous Relationship with the Company Required. Except as otherwise provided in this Section 3, this option

may not be exercised unless the Participant, at the time he or she exercises this option, is, and has been at all times since the
Grant Date, an employee, officer, or director of, or consultant or advisor to, the Company or any other entity the employees,
officers, directors, consultants, or advisors of which are eligible to receive option grants under the Plan (an “Eligible
Participant”).

(c)

Termination of Relationship with the Company. If the Participant ceases to be an Eligible Participant for any

reason, then, except as provided in this paragraph or in paragraphs (d) and (e) below, the right to exercise this option shall
terminate three months after such cessation (but in no event after the Final Exercise Date), provided that this option shall be
exercisable only to the extent that the Participant was entitled to exercise this option on the date of such cessation; and, provided,
further, that to the extent the Participant is a party to an Executive Severance Agreement or other written agreement with the
Company that provides for the option to remain outstanding and continue to vest during a specified period of time following the
Participant’s cessation of status as an Eligible Participant (such period, the “Severance

Period”), the option shall remain outstanding and shall continue to vest in accordance with the terms of this Agreement during the
Severance Period as if the Participant had remained an Eligible Participant during such period, subject to any conditions on
continued vesting as may be contained in such Executive Severance Agreement or other written agreement. Any portion of this
option that vests during such Severance Period will remain exercisable until the earlier of (A) the date that is three (3) months
following the date that is the last day of such Severance Period, or (B) the Final Exercise Date, and except to the extent
previously exercised as permitted by this Section 3(c) will thereupon immediately terminate. For the avoidance of doubt, any
portion of the option that fails to vest during the Severance Period will immediately be forfeited on the last day of such period.
Notwithstanding the foregoing, if the Participant, prior to the Final Exercise Date, violates the restrictive covenants (including,
without limitation, the non-competition, non-solicitation, or confidentiality provisions) of any employment contract, any non-
competition, non-solicitation, confidentiality or assignment agreement to which the Participant is a party, or any other agreement
between the Participant and the Company, the right to exercise this option shall terminate immediately upon such violation.

(d)

Exercise Period Upon Death. If the Participant dies prior to the Final Exercise Date while he or she is an Eligible

Participant and the Company has not terminated such relationship for “cause” as specified in paragraph (e) below, this option
shall be exercisable, within the period of one year following the date of death of the Participant, by an authorized transferee of the
Participant, provided that this option shall be exercisable only to the extent that this option was exercisable by the Participant on
the date of his or her death, and further provided that this option shall not be exercisable after the Final Exercise Date.

(e)

Termination for Cause. If, prior to the Final Exercise Date, the Participant’s employment, consulting, director or

advisor relationship with the Company is terminated by the Company for Cause (as defined below), the right to exercise this
option shall terminate immediately upon the effective date of such termination. If, prior to the Final Exercise Date, the Participant
is given notice by the Company of the termination of his or her service by the Company for Cause, and the effective date of such
termination is subsequent to the date of delivery of such notice, the right to exercise this option shall be suspended from the time
of the delivery of such notice until the earlier of (i) such time as it is determined or otherwise agreed that the Participant’s service
shall not be terminated for Cause as provided in such notice or (ii) the effective date of such termination (in which case the right
to exercise this option shall, pursuant to the preceding sentence, terminate upon the effective date of such termination). If the
Participant is a party to an Executive Severance Agreement or other written agreement with the Company, in any case which
agreement contains a definition of “cause” for termination of service, “Cause” shall have the meaning ascribed to such term in
such agreement. Otherwise, “Cause” shall mean willful misconduct by the Participant or willful failure by the Participant to
perform his or her responsibilities to the Company (including, without limitation, breach by the Participant of any fiduciary duty
or of any provision of any employment, consulting, advisory, nondisclosure, non-competition or other similar agreement between
the Participant and the Company), as determined by the Company, which determination shall be conclusive. The Participant shall
be considered to have been terminated for Cause if the Company determines, within 30 days after the Participant’s resignation,
that termination for Cause was warranted.

4.

Tax Matters.

(a)    Withholding. No Shares will be issued pursuant to the exercise of this option unless and until the Participant pays to

the Company, or makes provision satisfactory to the Company for payment of, any federal, state or local withholding taxes
required by law to be withheld in respect of this option.

    (b)    Disqualifying Disposition. If this option is an incentive stock option and the Participant disposes of Shares acquired upon
exercise of this option within two years from the Grant Date or one year after such Shares were acquired pursuant to exercise of
this option, the Participant shall notify the Company in writing of such disposition.

5.

Transfer Restrictions; Clawback.

(a)

This option may not be sold, assigned, transferred, pledged, encumbered or otherwise disposed of by the

Participant, either voluntarily or by operation of law, except by will or the laws of descent and distribution, and, during the
lifetime of the Participant, this option shall be exercisable only by the Participant.

(b)

In accepting this option, the Participant agrees to be bound by any clawback policy that the Company has in place

or may adopt in the future.

6.

Provisions of the Plan.

This option is subject to the provisions of the Plan (including the provisions relating to amendments to the Plan), a copy
of which is furnished to the Participant with this option. Notwithstanding the foregoing, to the extent the Participant has entered
in to an Executive Severance Agreement with the Company, for so long as such Executive Severance Agreement remains in
effect, the terms of such Executive Severance Agreement as they relate to the option shall control in the event of a conflict with
this Agreement or the Plan.

7.

Clawback Policy.

In accepting this option, the Participant agrees and acknowledges that the Participant is subject to, and bound by, the
terms of any clawback policy that the Company has in place or may adopt in the future, including without limitation Akebia
Therapeutic Inc.’s Compensation Recovery Policy adopted in accordance with stock exchange listing requirements. The
Participant agrees that in the event it is determined in accordance with any such policy that any compensation or compensatory
award granted, earned or paid to the Participant including this option or pursuant to any other compensation arrangement must be
forfeited or reimbursed to the Company, the Participant will promptly take any action necessary to effectuate such forfeiture
and/or reimbursement as determined by the Company.

ANNEX A

Akebia Therapeutics, Inc.
245 First Street
Cambridge, MA 02142

Dear Sir or Madam:

Akebia Therapeutics, Inc.

Stock Option Exercise Notice

I,                  (the “Participant”), hereby irrevocably exercise the right to purchase          shares of the Common Stock, $0.00001
par value per share (the “Shares”), of Akebia Therapeutics, Inc. (the “Company”) at $     per share pursuant to the Company’s
2023 Stock Incentive Plan and a stock option agreement with the Company dated          (the “Option Agreement”). Enclosed
herewith is a payment of $        , the aggregate purchase price for the Shares. The Shares should be registered in my name as it
appears below or, if so indicated below, jointly in my name and the name of the person designated below, with right of
survivorship.

Dated:                     

Signature 
Print Name:

Address:

Name and address of persons in whose name the Shares are to be jointly registered (if applicable):

                    
                    
                    
                    
AKEBIA THERAPEUTICS, INC.

RESTRICTED STOCK UNIT AGREEMENT FOR OFFICERS
2023 STOCK INCENTIVE PLAN

Exhibit 10.46

Akebia Therapeutics, Inc. (the “Company”) hereby grants the following restricted stock units pursuant to its 2023 Stock

Incentive Plan (the “Plan”). The terms and conditions attached hereto are also a part hereof.

Notice of Grant

Name of recipient (the “Participant”):
Grant Date:
Number of restricted stock units (“RSUs”) granted:
Vesting Start Date:

Vesting Schedule:

Vesting Date:

Number of RSUs that Vest:

All vesting is dependent on the Participant remaining an Eligible Participant, as provided herein.

This grant of RSUs satisfies in full all commitments that the Company has to the Participant with respect to the issuance of

stock, stock options or other equity securities.

Signature of Participant

Street Address

City/State/Zip Code

Akebia Therapeutics, Inc.

By:                    

Name of Officer
Title:

 
 
 
                    
 
                    
 
                    
 
Akebia Therapeutics, Inc.

Restricted Stock Unit Agreement for Officers
Incorporated Terms and Conditions

For valuable consideration, receipt of which is acknowledged, the parties hereto agree as follows:

1.

Award of Restricted Stock Units.

The Company has granted to the Participant, subject to the terms and conditions set forth in this Restricted Stock Unit
Agreement (this “Agreement”) and in the Company’s 2023 Stock Incentive Plan (the “Plan”), an award with respect to the
number of RSUs set forth in the Notice of Grant that forms part of this Agreement (the “Notice of Grant”). Each RSU represents
the right to receive one share of common stock, $0.00001 par value per share, of the Company (the “Common Stock”) upon
vesting of the RSU, subject to the terms and conditions set forth herein.

2.

Vesting; Delivery.

(a) General. The RSUs shall vest in accordance with the Vesting Schedule set forth in the Notice of Grant (the “Vesting
Schedule”), subject to the terms of any Executive Severance Agreement or other written agreement between the
Participant and the Company. Any fractional shares resulting from the application of any percentages used in the Vesting
Schedule shall be rounded down to the nearest whole number of RSUs.

(b) Change in Control.

i. Treatment of RSUs in a Change in Control. The RSUs, to the extent outstanding immediately prior to a Change

in Control but not then vested in full, will automatically and immediately become fully vested upon such Change
in Control.

ii. Definitions.

(A)    “Change in Control” means the occurrence of any of the following events other than in connection
with the consummation of an initial public offering of the Company’s securities: (A) any “person” (as such
term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended) who is not a
shareholder of the Company as of the date of this Agreement or an affiliate thereof is or becomes the
“beneficial owner” (as defined in Rule 13d-3 under said Act), directly or indirectly, of securities of the
Company representing 50% or more of the total voting power represented by the Company’s then
outstanding voting securities; (B) a change in the composition of the Board occurring within a two-year
period, as a result of which less than a majority of the directors are Incumbent Directors; (C) the date of the
consummation of a merger, scheme of arrangement or consolidation of the Company with any other
corporation that has been approved by the stockholders of the Company, other than a merger, scheme of
arrangement or consolidation which would result in the voting securities of the Company outstanding
immediately prior thereto continuing to represent (either by remaining outstanding or by being converted
into voting securities of the surviving entity) more

 
 
 
 
 
 
than fifty percent (50%) of the total voting power represented by the voting securities of the Company or
such surviving entity outstanding immediately after such merger or consolidation; or (D) the date of the
consummation of the sale or disposition by the Company of all or substantially all the Company’s assets.
Notwithstanding the foregoing, a transaction will not constitute a Change in Control if: (I) its sole purpose
is to change the domicile of the Company’s incorporation; or (II) its sole purpose is to create a holding
company that will be owned in substantially the same proportions by the persons who held the Company’s
securities immediately before such transaction. In all respects, the definition of Change in Control shall be
interpreted to comply with Section 409A of the Code, and any successor statute, regulation and guidance
thereto.

(B)    “Incumbent Directors” means directors who either (A) are directors of the Company as of the date
hereof, or (B) are elected, or nominated for election, to the Board with the affirmative votes of at least a
majority of the remaining Incumbent Directors at the time of such election or nomination (but will not
include an individual whose election or nomination is in connection with an actual or threatened proxy
contest relating to the election of directors to the Company).

(c) Delivery. Upon the vesting of the RSU, the Company will deliver to the Participant, for each RSU that becomes vested,
one share of Common Stock, subject to the payment of any taxes pursuant to Section 7. The Common Stock will be
delivered to the Participant as soon as practicable following each vesting date, but in any event within 30 days of such
date.

3.

Forfeiture of Unvested RSUs Upon Cessation of Service.

In the event that the Participant ceases to be an employee, officer, or director of, or consultant or advisor to, the Company or
any other entity the employees, officers, directors, consultants, or advisors of which are eligible to receive awards under the Plan
(an “Eligible Participant”) for any reason or no reason, with or without cause, all of the RSUs that are unvested as of the time of
such cessation shall be forfeited immediately and automatically to the Company, without the payment of any consideration to the
Participant, effective as of such cessation. The Participant shall have no further rights with respect to the unvested RSUs or any
Common Stock that may have been issuable with respect thereto. If the Participant provides services to a subsidiary of the
Company, any references in this Agreement to provision of services to the Company shall instead be deemed to refer to service
with such subsidiary.

Notwithstanding the foregoing, to the extent the Participant is a party to an Executive Severance Agreement or other written

employment agreement with the Company that provides for the RSUs to remain outstanding and continue to vest during a
specified period of time following Participant’s cessation of status as an Eligible Participant (such period, the “Severance
Period”), the RSUs will remain outstanding and will continue to vest, and the Shares will be delivered upon such vesting, in
accordance with the terms of this Agreement during the Severance Period as if the Participant had continued to be an Eligible
Participant during such period, subject to any conditions on the vesting and delivery as may be contained in such Executive
Severance Agreement or other written agreement. For the avoidance of doubt, any portion of the RSUs that fails to vest during
the Severance Period will immediately be forfeited on the last day of such period.

4.

Restrictions on Transfer.

 
 
 
 
The Participant shall not sell, assign, transfer, pledge, hypothecate, encumber or otherwise dispose of, by operation of law or

otherwise (collectively “transfer”) any RSUs, or any interest therein. The Company shall not be required to treat as the owner of
any RSUs or issue any Common Stock to any transferee to whom such RSUs have been transferred in violation of any of the
provisions of this Agreement.

5.

Rights as a Stockholder.

The Participant shall have no rights as a stockholder of the Company with respect to any shares of Common Stock that may
be issuable with respect to the RSUs until the issuance of the shares of Common Stock to the Participant following the vesting of
the RSUs.

6.

Provisions of the Plan.

This Agreement is subject to the provisions of the Plan, a copy of which is furnished to the Participant with this Agreement.

7.

Tax Matters.

(a) Acknowledgments; No Section 83(b) Election. The Participant acknowledges that he or she is responsible for

obtaining the advice of the Participant’s own tax advisors with respect to the award of RSUs and the Participant is relying solely
on such advisors and not on any statements or representations of the Company or any of its agents with respect to the tax
consequences relating to the RSUs. The Participant understands that the Participant (and not the Company) shall be responsible
for the Participant’s tax liability that may arise in connection with the acquisition, vesting and/or disposition of the RSUs. The
Participant acknowledges that no election under Section 83(b) of the Internal Revenue Code of 1986, as amended (the “Code”), is
available with respect to RSUs.

(b) Withholding. The Participant acknowledges and agrees that the Company has the right to deduct from payments of

any kind otherwise due to the Participant any federal, state, local or other taxes of any kind required by law to be withheld with
respect to the vesting of the RSUs. At such time as the Participant is not aware of any material nonpublic information about the
Company or the Common Stock and is not prohibited from doing so by the Company’s insider trading policy or otherwise, the
Participant shall execute the instructions set forth in Schedule A attached hereto (the “Durable Automatic Sell-to-Cover
Instruction”) as the means of satisfying such tax obligation unless the Participant has already executed such instruction, as
determined by the Company. If the Participant does not execute the Durable Automatic Sell-to-Cover Instruction prior to an
applicable vesting date, then the Participant agrees that if under applicable law the Participant will owe taxes at such vesting date
on the portion of the award then vested the Company shall be entitled to immediate payment from the Participant of the amount
of any tax required to be withheld by the Company. The Company shall not deliver any shares of Common Stock to the
Participant until it is satisfied that all required withholdings have been made.

8.

Miscellaneous.

(a) No Right to Continued Service. The Participant acknowledges and agrees that, notwithstanding the fact that the

vesting of the RSUs is contingent upon his or her continued service to the Company, this Agreement does not constitute an
express or implied promise of continued service relationship with the Participant or confer upon the Participant any rights with
respect to a continued service relationship with the Company or any affiliate of the Company.

 
 
 
 
 
 
 
(b) Section 409A. The RSUs awarded pursuant to this Agreement are intended to be exempt from or comply with the

requirements of Section 409A of the Code and the Treasury Regulations issued thereunder (“Section 409A”). The delivery of
shares of Common Stock on the vesting of the RSUs may not be accelerated or deferred unless permitted or required by
Section 409A.

(c) Participant’s Acknowledgments. The Participant acknowledges that he or she: (i) has read this Agreement; (ii) has
been represented in the preparation, negotiation and execution of this Agreement by legal counsel of the Participant’s own choice
or has voluntarily declined to seek such counsel; (iii) understands the terms and consequences of this Agreement; (iv) is agreeing,
in accepting this award, to be bound by any clawback policy that the Company has in place or may adopt in the future; and (v) is
fully aware of the legal and binding effect of this Agreement.

(d) Governing Law. This Agreement shall be construed, interpreted and enforced in accordance with the internal laws

of the State of Delaware without regard to any applicable conflicts of laws provisions.

9.

Clawback Policy.

In accepting this award, the Participant agrees and acknowledges that the Participant is subject to, and bound by, the terms

of any clawback policy that the Company has in place or may adopt in the future, including without limitation Akebia
Therapeutic Inc.’s Compensation Recovery Policy adopted in accordance with stock exchange listing requirements. The
Participant agrees that in the event it is determined in accordance with any such policy that any compensation or compensatory
award granted, earned or paid to the Participant including this award or pursuant to any other compensation arrangement must be
forfeited or reimbursed to the Company, the Participant will promptly take any action necessary to effectuate such forfeiture
and/or reimbursement as determined by the Company.

 
Schedule A

Durable Automatic Sell-to-Cover Instruction

This Durable Automatic Sell-to-Cover Instruction (this “Instruction”), which is being delivered to Akebia Therapeutics,

Inc. (the “Company”) by the undersigned on the date set forth below (the “Adoption Date”), relates to the Covered RSUs (as
defined following my signature below). This Instruction provides for “eligible sell-to-cover transactions” (as described in Rule
10b5-1(c)(1)(ii)(D)(3) under the Securities Exchange Act of 1934 (the “Exchange Act”)) and is intended to satisfy the affirmative
defense conditions of Rule 10b5-1(c)(1) under the Exchange Act.

I acknowledge that upon vesting and settlement of any Covered RSUs in accordance with the applicable RSU’s terms,

whether vesting is based on the passage of time or the achievement of performance goals, I will have compensation income equal
to the fair market value of the shares of the Company’s common stock subject to the RSUs that are settled on such settlement date
and that the Company is required to withhold income and employment taxes in respect of that compensation income.

I desire to establish a plan and process to satisfy such withholding obligation in respect of all Covered RSUs through an

automatic sale of a portion of the shares of the Company’s common stock that would otherwise be issuable to me on each
applicable settlement date, such portion to be in an amount sufficient to satisfy such withholding obligation, with the proceeds of
such sale delivered to the Company in satisfaction of such withholding obligation.

I understand that the Company has arranged for the administration and execution of its equity incentive programs and the

sale of securities by participants thereunder pursuant to a platform administered by a third party (the “Administrator”) and the
Administrator’s designated brokerage partner.

Upon the settlement of any of my Covered RSUs after the 30th day following the Adoption Date (or if I am an officer of

the Company on the Adoption Date, after the 120th day following the Adoption Date), I hereby appoint the Administrator (or any
successor administrator) to automatically sell such number of shares of the Company’s common stock issuable with respect to
such RSUs that vested and settled as is sufficient to generate net proceeds sufficient to satisfy the Company’s minimum statutory
withholding obligations with respect to the income recognized by me in connection with the vesting and settlement of such RSUs
(based on minimum statutory withholding rates for all tax purposes, including payroll and social security taxes, that are
applicable to such income), and the Company shall receive such net proceeds in satisfaction of such tax withholding obligation.
I hereby appoint the Chief Executive Officer, Chief Financial Officer, General Counsel and Secretary of the Company to

serve as my attorneys in fact to arrange for the sale of shares of the Company’s common stock in accordance with this
Instruction. I agree to execute and deliver such documents, instruments and certificates as may reasonably be required in
connection with the sale of the shares of common stock pursuant to this Instruction.

Unless the last box in the definition of Covered RSUs below is checked, if I have previously adopted an automatic sale or

sell-to-cover instruction relating to Covered RSUs, this Instruction shall be void ab initio.

I hereby certify that, as of the Adoption Date:
(i) I am not prohibited from entering into this Instruction by the Company’s insider trading policy or otherwise;
(ii) I am not aware of any material nonpublic information about the Company or its common stock; and

(iii) I am adopting this Instruction in good faith and not as part of a plan or scheme to evade the prohibitions of

Rule 10b-5 under the Exchange Act.

                        ________________________________

                        Print Name: _____________________

                        Date: __________________________

Covered RSUs:
The following restricted stock units (“RSUs”) are covered by this Instruction.

Check all applicable boxes:

☐  The first award of RSUs granted to me on or after ______________ [insert date of grant of current RSUs the grant of which is
triggering the execution of this Instruction; if Instruction is being executed in advance of a grant of RSUs, insert the Adoption
Date] and any RSUs that may, from time to time following such date, be granted to me by the Company, other than any future
granted RSUs which by the terms of the applicable award agreement require the Company to withhold shares for tax withholding
obligations in connection with the vesting and settlement of such RSUs, and therefore do not permit sell-to-cover transactions.

☐  Any outstanding RSUs that were granted to me by the Company prior to the Adoption Date that (1) are not subject to any prior
automatic sale or sell-to-cover instruction and (2) for which the next vesting date is after the cooling-off period referred to above,
other than any previously granted RSUs which by the terms of the applicable award agreement require the Company to withhold
shares for tax withholding obligations in connection with the vesting and settlement of such RSUs, and therefore do not permit
sell-to-cover transactions.

☐  With respect to any RSUs, whether or not granted to me by the Company prior to the Adoption Date, that already are subject
to an automatic sale or sell-to-cover instruction (a “Prior Instruction”), I elect to have such sales effected pursuant to this
Instruction and confirm that doing so does not modify or change the amount, price, or timing of such sales from those provided
by the Prior Instruction (and, as a result the cooling-off period referred to above is not applicable to sales pursuant to this
Instruction that were previously subject to the Prior Instruction).

AKEBIA THERAPEUTICS, INC.

OFFICER INDUCEMENT AWARD
STOCK OPTION AGREEMENT

Exhibit 10.47

Akebia Therapeutics, Inc. (the “Company”) hereby grants the following inducement non-statutory stock option award.

The terms and conditions attached hereto are also a part hereof.

Notice of Grant

Name of optionee (the “Participant”):
Grant Date:
Number of shares of the Company’s Common Stock subject
to this option (“Shares”):
1
Option exercise price per Share:

Number, if any, of Shares that vest immediately on the grant
date:

Shares that are subject to vesting schedule:

Vesting Start Date:
 2
Final Exercise Date:

Vesting Schedule:

Vesting Date:

Number of Options that Vest:

All vesting is dependent on the Participant remaining an Eligible Participant, as provided herein.

This option satisfies in full all commitments that the Company has to the Participant with respect to the issuance of stock,

stock options or other equity securities.

Signature of Participant

Street Address

City/State/Zip Code

Akebia Therapeutics, Inc.

By:                    

Name of Officer
Title:

1
     This must be at least 100% of the Grant Date Fair Market Value (as defined in the Plan) of the Common Stock on the date of grant.
2
    The Final Exercise Date must be no more than 10 years from the date of grant. The correct approach to calculate the final exercise date is to use the day
immediately prior to the date ten years out from the date of the stock option award grant.

                    
 
                    
 
                    
 
Akebia Therapeutics, Inc.

Officer Inducement Award
Non-Statutory Stock Option Agreement

Incorporated Terms and Conditions

1.

Grant of Option.

This agreement evidences the grant by the Company, on the grant date (the “Grant Date”) set forth in the Notice of Grant

that forms part of this agreement (the “Notice of Grant”), to the Participant of an option to purchase, in whole or in part, on the
terms provided herein, the number of Shares set forth in the Notice of Grant of common stock, $0.00001 par value per share, of
the Company (“Common Stock”), at the exercise price per Share set forth in the Notice of Grant. Unless earlier terminated, this
option shall expire at 5:00 p.m., Eastern time, on the Final Exercise Date set forth in the Notice of Grant (the “Final Exercise
Date”).

The option evidenced by this agreement is being granted to the Participant pursuant to the inducement grant exception

under Nasdaq Stock Market Rule 5635(c)(4) as an inducement that is material to the Participant’s employment with the
Company, and not pursuant to the Company’s 2023 Stock Incentive Plan (the “Plan”), or any equity incentive plan of the
Company. Notwithstanding the foregoing, the option shall be subject to, and governed by, and shall be construed and
administered in accordance with, the terms of the Plan, which terms and conditions are incorporated herein by reference, but any
shares of Common Stock issued hereunder shall not reduce the number of shares of Common Stock available under the Plan.

The option evidenced by this agreement is not intended to be an incentive stock option as defined in Section 422 of the

Internal Revenue Code of 1986, as amended, and any regulations promulgated thereunder (the “Code”). Except as otherwise
indicated by the context, the term “Participant”, as used in this option, shall be deemed to include any person who acquires the
right to exercise this option validly under its terms.

2.

Vesting Schedule.

(a)

General. Subject to this Agreement and the terms of any Executive Severance Agreement or other written

agreement between the Participant and the Company, this option will become exercisable (“vest”) in accordance with the vesting
schedule set forth in the Notice of Grant.

(b)

Change in Control.

(1)

Treatment of Option in a Change in Control. The option, to the extent outstanding immediately prior to a

Change in Control but not then vested in full, shall automatically become fully vested and exercisable upon such Change in
Control.

(2)

Definitions.

(i)    “Change in Control” means the occurrence of any of the following events other than in connection
with the consummation of an initial public offering of the Company’s securities: (A) any “person” (as such
term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934,

as amended) who is not a shareholder of the Company as of the date of this Agreement or an affiliate
thereof is or becomes the “beneficial owner” (as defined in Rule 13d-3 under said Act), directly or
indirectly, of securities of the Company representing 50% or more of the total voting power represented by
the Company’s then outstanding voting securities; (B) a change in the composition of the Board occurring
within a two-year period, as a result of which less than a majority of the directors are Incumbent Directors;
(C) the date of the consummation of a merger, scheme of arrangement or consolidation of the Company
with any other corporation that has been approved by the stockholders of the Company, other than a
merger, scheme of arrangement or consolidation which would result in the voting securities of the
Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding
or by being converted into voting securities of the surviving entity) more than fifty percent (50%) of the
total voting power represented by the voting securities of the Company or such surviving entity
outstanding immediately after such merger or consolidation; or (D) the date of the consummation of the
sale or disposition by the Company of all or substantially all the Company’s assets. Notwithstanding the
foregoing, a transaction will not constitute a Change in Control if: (I) its sole purpose is to change the
domicile of the Company’s incorporation; or (II) its sole purpose is to create a holding company that will
be owned in substantially the same proportions by the persons who held the Company’s securities
immediately before such transaction. In all respects, the definition of Change in Control shall be
interpreted to comply with Section 409A of the Code, and any successor statute, regulation and guidance
thereto.

“Incumbent Directors” means directors who either (A) are directors of the Company as of the date

(ii)
hereof, or (B) are elected, or nominated for election, to the Board with the affirmative votes of at least a
majority of the remaining Incumbent Directors at the time of such election or nomination (but will not
include an individual whose election or nomination is in connection with an actual or threatened proxy
contest relating to the election of directors to the Company).

(c)

Exercisability. The right of exercise shall be cumulative so that to the extent the option is not exercised in any
period to the maximum extent permissible it shall continue to be exercisable, in whole or in part, with respect to all Shares for
which it is vested until the earlier of the Final Exercise Date or the termination of this option under Section 3 hereof or the Plan.

3.

Exercise of Option.

(a)

Form of Exercise. Each election to exercise this option shall be in writing, in the form of the Stock Option

Exercise Notice attached as Annex A, signed by the Participant, and received by the Company at its principal office,
accompanied by this agreement, or in such other form (which may be electronic) as is approved by the Company, together with
payment in full in the manner provided in the Plan. The Participant may purchase less than the number of shares covered hereby,
provided that no partial exercise of this option may be for any fractional share or for fewer than ten whole shares.

(b)

Continuous Relationship with the Company Required. Except as otherwise provided in this Section 3, this option

may not be exercised unless the Participant, at the time he or she exercises this option, is, and has been at all times since the
Grant Date, an employee,

officer, or director of, or consultant or advisor to, the Company or any other entity the employees, officers, directors, consultants,
or advisors of which are eligible to receive option grants under the Plan (an “Eligible Participant”).

(c)

Termination of Relationship with the Company. If the Participant ceases to be an Eligible Participant for any

reason, then, except as provided in this paragraph or in paragraphs (d) and (e) below, the right to exercise this option shall
terminate three months after such cessation (but in no event after the Final Exercise Date), provided that this option shall be
exercisable only to the extent that the Participant was entitled to exercise this option on the date of such cessation; and, provided,
further, that to the extent the Participant is a party to an Executive Severance Agreement or other written agreement with the
Company that provides for the option to remain outstanding and continue to vest during a specified period of time following the
Participant’s cessation of status as an Eligible Participant (such period, the “Severance Period”), the option shall remain
outstanding and shall continue to vest in accordance with the terms of this Agreement during the Severance Period as if the
Participant had remained an Eligible Participant during such period, subject to any conditions on continued vesting as may be
contained in such Executive Severance Agreement or other written agreement. Any portion of this option that vests during such
Severance Period will remain exercisable until the earlier of (A) the date that is three (3) months following the date that is the last
day of such Severance Period, or (B) the Final Exercise Date, and except to the extent previously exercised as permitted by this
Section 3(c) will thereupon immediately terminate. For the avoidance of doubt, any portion of the option that fails to vest during
the Severance Period will immediately be forfeited on the last day of such period. Notwithstanding the foregoing, if the
Participant, prior to the Final Exercise Date, violates the restrictive covenants (including, without limitation, the non-competition,
non-solicitation, or confidentiality provisions) of any employment contract, any non-competition, non-solicitation, confidentiality
or assignment agreement to which the Participant is a party, or any other agreement between the Participant and the Company, the
right to exercise this option shall terminate immediately upon such violation.

(d)

Exercise Period Upon Death. If the Participant dies prior to the Final Exercise Date while he or she is an Eligible

Participant and the Company has not terminated such relationship for “cause” as specified in paragraph (e) below, this option
shall be exercisable, within the period of one year following the date of death of the Participant, by an authorized transferee of the
Participant, provided that this option shall be exercisable only to the extent that this option was exercisable by the Participant on
the date of his or her death, and further provided that this option shall not be exercisable after the Final Exercise Date.

(e)

Termination for Cause. If, prior to the Final Exercise Date, the Participant’s employment, consulting, director or

advisor relationship with the Company is terminated by the Company for Cause (as defined below), the right to exercise this
option shall terminate immediately upon the effective date of such termination. If, prior to the Final Exercise Date, the Participant
is given notice by the Company of the termination of his or her service by the Company for Cause, and the effective date of such
termination is subsequent to the date of delivery of such notice, the right to exercise this option shall be suspended from the time
of the delivery of such notice until the earlier of (i) such time as it is determined or otherwise agreed that the Participant’s service
shall not be terminated for Cause as provided in such notice or (ii) the effective date of such termination (in which case the right
to exercise this option shall, pursuant to the preceding sentence, terminate upon the effective date of such termination). If the
Participant is subject to an Executive Severance Agreement or other written agreement with the Company, in any case which
agreement contains a definition of “cause” for termination of service, “Cause” shall have the meaning ascribed to such term in
such agreement. Otherwise, “Cause” shall mean willful misconduct by the Participant or willful failure by the Participant to
perform his or her responsibilities to the Company (including, without limitation, breach by the Participant of any fiduciary duty
or of any provision of any employment, consulting, advisory,

nondisclosure, non-competition or other similar agreement between the Participant and the Company), as determined by the
Company, which determination shall be conclusive. The Participant shall be considered to have been terminated for Cause if the
Company determines, within 30 days after the Participant’s resignation, that termination for Cause was warranted.

4.

Tax Matters.

No Shares will be issued pursuant to the exercise of this option unless and until the Participant pays to the Company, or
makes provision satisfactory to the Company for payment of, any federal, state or local withholding taxes required by law to be
withheld in respect of this option.

5.

Transfer Restrictions; Clawback.

(a)

This option may not be sold, assigned, transferred, pledged, encumbered or otherwise disposed of by the

Participant, either voluntarily or by operation of law, except by will or the laws of descent and distribution, and, during the
lifetime of the Participant, this option shall be exercisable only by the Participant.

(b)

In accepting this option, the Participant agrees to be bound by any clawback policy that the Company has in place

or may adopt in the future.

6.

Provisions of the Plan.

As described in Section 1 of this Agreement, this option is subject to the provisions of the Plan (including the provisions

relating to amendments to the Plan), a copy of which is furnished to the Participant with this option. Notwithstanding the
foregoing, to the extent the Participant has entered in to an Executive Severance Agreement with the Company, for so long as
such Executive Severance Agreement remains in effect, the terms of such Executive Severance Agreement as they relate to the
option shall control in the event of a conflict with this Agreement or the Plan.

7.

Clawback Policy.

In accepting this option, the Participant agrees and acknowledges that the Participant is subject to, and bound by, the
terms of any clawback policy that the Company has in place or may adopt in the future, including without limitation Akebia
Therapeutic Inc.’s Compensation Recovery Policy adopted in accordance with stock exchange listing requirements. The
Participant agrees that in the event it is determined in accordance with any such policy that any compensation or compensatory
award granted, earned or paid to the Participant including this option or pursuant to any other compensation arrangement must be
forfeited or reimbursed to the Company, the Participant will promptly take any action necessary to effectuate such forfeiture
and/or reimbursement as determined by the Company.

ANNEX A

Akebia Therapeutics, Inc.
245 First Street
Cambridge, MA 02142

Dear Sir or Madam:

Akebia Therapeutics, Inc.

Stock Option Exercise Notice

I,                  (the “Participant”), hereby irrevocably exercise the right to purchase          shares of the Common Stock, $0.00001
par value per share (the “Shares”), of Akebia Therapeutics, Inc. (the “Company”) at $     per share pursuant to a stock option
agreement with the Company dated          (the “Option Agreement”). Enclosed herewith is a payment of $        , the aggregate
purchase price for the Shares. The Shares should be registered in my name as it appears below or, if so indicated below, jointly in
my name and the name of the person designated below, with right of survivorship.

Dated:                     

Signature 
Print Name:

Address:

Name and address of persons in whose name the Shares are to be jointly registered (if applicable):

                    
                    
                    
                    
Exhibit 10.66

February 8, 2024

BY EMAIL

Nicole R. Hadas
[Address]

Dear Nikki:

Upon your execution of this Amendment, the following amendments will be made to your Separation
Agreement with Akebia Therapeutics, Inc. (“Akebia”) dated May 5, 2022 (as previously amended, the
“Separation Agreement”). Paragraph 1(ii) of the Separation Agreement shall be replaced in its entirety with
the following:

(ii)    Separation Date. Unless your employment is terminated by the Company for Cause or by you for

Good Reason (as those terms are deined in your Executive Severance Agreement dated March
3, 2014, the “ESA”), you will remain employed until June 14, 2024 (as may be amended from
time to time, the "Separation Date"). The Separation Date may be modiied only upon mutual
written agreement between you and the Company.

All other terms and conditions of the Separation Agreement shall remain in full force and effect.

Very truly yours,

AKEBIA THERAPEUTICS, INC.    Accepted and Agreed to Under Seal:

/s/ John P. Butler______________________    /s/ Nicole R. Hadas__________________

President and Chief Executive Oficer    Nicole R. Hadas

Dated: February 8, 2024

    
 
 
 
 
 
    
                                
Exhibit 10.67

February 7, 2024

BY EMAIL

Michel Dahan

[Address]

Dear Michel:

Upon your execution of this Amendment, the following amendments will be made to your Separation
Agreement with Akebia Therapeutics, Inc. (“Akebia”) dated May 5, 2022 (as previously amended, the
“Separation Agreement”). Paragraph 1(ii) of the Separation Agreement shall be replaced in its entirety with
the following:

(ii)    Separation Date. Unless your employment is terminated by the Company for Cause or by you for

Good Reason (as those terms are deined in your Executive Severance Agreement dated March
3, 2014, the “ESA”), you will remain employed until June 28, 2024 (as may be amended from
time to time, the "Separation Date"). The Separation Date may be modiied only upon mutual
agreement between you and the Company.

All other terms and conditions of the Separation Agreement shall remain in full force and effect.

Very truly yours,

AKEBIA THERAPEUTICS, INC.    Accepted and Agreed to Under Seal:

/s/ John P. Butler_______________________    /s/Michel Dahan______________________
President and Chief Executive Oficer         Michel Dahan

Dated: February 8, 2024

    
 
 
 
 
Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of
information that the registrant treats as private or confidential. Double asterisks denote omissions.

Exhibit 10.93
Execution Version

FOURTH AMENDMENT TO LOAN AGREEMENT
This  FOURTH  AMENDMENT  TO  LOAN  AGREEMENT  (this  “Amendment”),  dated  and  effective  as  of  October  31,  2023  (the  “Fourth
Amendment  Effective  Date”),  by  and  among  AKEBIA  THERAPEUTICS,  INC.,  a  Delaware  corporation  (as  “Borrower”),  BIOPHARMA
CREDIT PLC, a public limited company incorporated under the laws of England and Wales (as the “Collateral Agent”), BPCR LIMITED
PARTNERSHIP,  a  limited  partnership  established  under  the  laws  of  England  and  Wales  (as  a  “Lender”),  and  BIOPHARMA  CREDIT
INVESTMENTS V (MASTER) LP, a Cayman Islands exempted limited partnership (as a “Lender”).

Recitals

A.    Collateral Agent, Lenders, Borrower and the other Credit Parties thereunder have entered into that certain Loan Agreement,
dated  as  of  November  11,  2019,  and  amended  by  that  certain  First  Amendment  and  Waiver,  dated  as  of  February  18,  2022,  that  certain
Second Amendment and Waiver, dated as of July 15, 2022, and that certain Third Amendment to Loan Agreement, dated as of June 30, 2023
(the “Existing Loan Agreement”) and as further amended by this Fourth Amendment, (the “Loan Agreement”).

B.    In accordance with Section 11.5 of the Existing Loan Agreement, Borrower (acting for its own behalf and on behalf of the other
Credit Parties other than Parent), Collateral Agent and Lenders desire to amend the Existing Loan Agreement on the terms and conditions set
forth herein.

Agreement

Now, Therefore, in consideration of the foregoing recitals and other good and valuable consideration, the receipt and adequacy of

which is hereby acknowledged, and intending to be legally bound, the parties hereto agree as follows:

1.

Definitions. All capitalized terms used in this Amendment (including in the recitals hereof) and not otherwise defined herein
shall have the meanings assigned to them in the Loan Agreement. The rules of interpretation set forth in the first paragraph of Section 13.1 of
the Loan Agreement shall be applicable to this Amendment and are incorporated herein by this reference.

2.

Amendments to Loan Agreement. With effect from and including the Third Amendment Effective Date, the Existing Loan

Agreement shall be amended so that it shall be read and construed for all purposes as set forth in Schedule A attached hereto.

Agreement and replacing it as follows:

a. The  Existing  Loan  Agreement  shall  be  amended  by  deleting  in  its  entirety  Section  2.2(b)(i)  of  the  Existing  Loan

“(i)     Subject to clauses (ii) and (iii) of this clause (b), with respect to each applicable Term Loan, Borrower shall make
equal monthly payments of principal of such Term Loan commencing on October 31, 2024, and continuing on a monthly basis on the
last date of each month thereafter through the Term Loan Maturity Date; provided, however, that if any such day is not a Business
Day, the applicable payment shall be due and payable on the first Business Day immediately preceding such payment date.”

Agreement and replacing it as follows:

b. The  Existing  Loan  Agreement  shall  be  amended  by  deleting  in  its  entirety  Section  2.2(b)(ii)  of  the  Existing  Loan

“(ii)          Notwithstanding  clause  (i)  of  this  clause  (b),  and  subject  to  clause  (iii)  of  this  clause  (b),  with  respect  to  each

applicable Term Loan, on the date on which a [**] occurs (a

“[**]”),  (x)  Borrower  shall  make  equal  quarterly  payments  of  principal  of  such  Term  Loan  commencing  on  the  Payment  Date
immediately  following  such  [**]  and  continuing  on  a  quarterly  basis  on  each  Payment  Date  thereafter  through  the  Term  Loan
Maturity Date, provided, however, that if any such day is not a Business Day, the applicable payment shall be due and payable on the
first Business Day immediately preceding such Payment Date, and (y)(1) if the [**] occurs on or before July 1, 2024, then Borrower
shall repay on July 1, 2024 all unpaid principal that would have been due and payable during the period commencing on the Payment
Date immediately following the Fourth Amendment Effective Date and ending on the Payment Date immediately following July 1,
2024 (including all accrued and unpaid interest thereon, if any), as if Borrower had been required hereunder to make equal quarterly
payments of principal of such Term Loan commencing on the Payment Date immediately following the Fourth Amendment Effective
Date, and (2) if the [**] occurs after July 1, 2024, then Borrower shall promptly, and in any event no later than [**] after such [**],
repay all unpaid principal that would have been due and payable during the period commencing on the Payment Date immediately
following  the  Fourth  Amendment  Effective  Date  and  ending  on  the  Payment  Date  immediately  following  such  [**]  (including  all
accrued  and  unpaid  interest  thereon,  if  any),  as  if  Borrower  had  been  required  hereunder  to  make  equal  quarterly  payments  of
principal of such Term Loan commencing on the Payment Date immediately following the Fourth Amendment Effective Date.”

Agreement and replacing it as follows:

c. The Existing Loan Agreement shall be amended by deleting in its entirety Section 2.2(b)(iii) of the Existing Loan

“(iii)     Notwithstanding clauses (i) and (ii) of this clause (b), with respect to each Term Loan, as applicable, in connection
with a decrease in the Term Loan Maturity Date and scheduled amortization of such Term Loan pursuant to Section 5.7(c), each of
the then outstanding Payment Dates on which monthly payments of principal of such Term Loan are payable shall be reduced by the
number of days equal to the Amortization Reduction Days in accordance with Section 5.7(c) hereof.”

Agreement and replacing it as follows:

d. The Existing Loan Agreement shall be amended by deleting in its entirety Section 2.3(a)(iii) of the Existing Loan

“(iii)     Interest is due and payable quarterly on each Interest Date, as calculated by the Collateral Agent (which calculations
shall be deemed correct absent manifest error), commencing on the Interest Date occurring from and after the Fourth Amendment
Effective Date; provided, however, that if any such date is not a Business Day, the applicable interest shall be due and payable on the
first Business Day immediately preceding such Interest Date.”

e. Section 2.3(d) of the Existing Loan Agreement and replacing it as follows:

“(d)    Payments. Except as otherwise expressly provided herein, all Term Loan payments and any other payments hereunder
by (or on behalf of) Borrower shall be made on the date specified herein to such bank account of each applicable Lender as such
Lender (or the Collateral Agent) shall have designated in a written notice to Borrower delivered on or before the Tranche A Closing
Date (which such notice may be updated by such Lender (or the Collateral Agent) by written notice to Borrower from time to time
after the Tranche A Closing Date). Except as otherwise expressly provided herein, interest is payable quarterly on each Interest Date
provided,  however,  that  if  any  such  Interest  Date  is  not  a  Business  Day,  the  applicable  interest  shall  be  due  and  payable  on  the
immediately preceding Business Day. Payments of principal or interest received after [**] (New York City time) on such date (or any
Payment Date) are considered received at the opening of business on the next Business Day. All payments to be made by Borrower
hereunder  or  under  any  other  Loan  Document,  including  payments  of  principal  and  interest  made  hereunder  and  pursuant  to  any
other  Loan  Document,  and  all  fees,  expenses,  indemnities  and  reimbursements,  shall  be  made  without  set-off,  recoupment  or
counterclaim, in lawful money of the United States and in immediately available funds.”

Agreement and replacing it as follows:

f. The  Existing  Loan  Agreement  shall  be  amended  by  deleting  in  its  entirety  Section  4.21(c)  of  the  Existing  Loan

“(c)        Except  as  disclosed  on  Schedule  4.21(c)  of  the  Disclosure  Letter,  no  Credit  Party  or  any  of  its  Subsidiaries  has
received any notice, oral or written, from any party to any Manufacturing Agreement containing any indication by or intent or threat
of, such party to reduce or cease, in any material respect, the supply of Product or the active pharmaceutical ingredient incorporated
therein  in  the  Territory  through  [**]  (or  such  earlier  date  in  accordance  with  the  terms  and  conditions  of  such  Manufacturing
Agreement, as applicable).”

Loan Agreement with a reference to [**].

g. The Existing Loan Agreement shall be amended by replacing the reference to [**] in Section 5.7(c) of the Existing

Agreement and replacing it as follows:

h. The  Existing  Loan  Agreement  shall  be  amended  by  deleting  in  its  entirety  Section  7.1  of  the  Existing  Loan

“7.1     Payment Default. Any Credit Party fails to (a) make any payment of any principal of the Term Loans when and as
the same shall become due and payable, whether at the due date thereof (including pursuant to Section 2.2(c)) or at a date fixed for
prepayment  (whether  voluntary  or  mandatory)  thereof  or  by  acceleration  thereof  or  otherwise,  or  (b)  within  [**]  after  the  same
becomes  due,  any  payment  of  interest  or  premium  pursuant  to  Section  2.2,  including  any  applicable  Additional  Consideration,
Makewhole Amount or Prepayment Premium, or any other Obligations (which [**] cure period shall not apply to any such payments
due on the Term Loan Maturity Date, such earlier date pursuant to Section 2.2(b)(y), Section 2.2(c)(ii) or Section 2.2(c)(iii) hereof or
the date of acceleration pursuant to Section 8.1(a) hereof). A failure to pay any such interest, premium or Obligations pursuant to the
foregoing clause (b) prior to the end of such [**]-period shall not constitute an Event of Default (unless such payment is due on the
Term Loan Maturity Date, such earlier date pursuant to Section 2.2(b)(y), Section 2.2(c)(ii) or Section 2.2(c)(iii) hereof or the date of
acceleration pursuant to Section 8.1(a) hereof).”

Prepayment Premium” and replacing it as follows:

i. The Existing Loan Agreement shall be amended by deleting in its entirety clause (c) of the definition of “Tranche A

“(c)    if such prepayment occurs on or after the 4 -year anniversary of the Tranche A Closing Date but prior to March 31,

th

2025, 0.005.”

j. The Existing Loan Agreement shall be amended by deleting in its entirety each of the definitions of Interest Date,
Payment  Date,  Term  Loan  Maturity  Date,  and  Term  SOFR,  in  Section  13.1  of  the  Existing  Loan  Agreement  and  replacing  them,  in
alphabetical order, as follows:

““Interest Date” means the last day of each calendar quarter, commencing with the last day of the calendar quarter during

which the Fourth Amendment Effective Date occurs.”

st

th

““Payment Date” means, with respect to each Term Loan, (a) the Interest Date occurring on or immediately following each
of  the  following  dates:  (i)  the  34 -month  anniversary  of  the  Closing  Date  applicable  to  such  Term  Loan,  (ii)  the  36 -month
anniversary  of  such  Closing  Date,  (iii)  the  39 -month  anniversary  of  such  Closing  Date,  (iv)  the  42 -month  anniversary  of  such
Closing Date, (v) the 45 -month anniversary of such Closing Date, (vi) the 48 -month anniversary of such Closing Date, (vii) the
51 -month anniversary of such Closing Date, (viii) the 54 -month anniversary of such Closing Date, (ix) the 57 -month anniversary
of such Closing Date, (x) the 60 -month anniversary of such Closing Date, (xi) the 63 -month anniversary of such Closing Date and
(b)  the  Term  Loan  Maturity  Date,  as  the  context  dictates;  provided,  however,  that  if  any  such  date  is  not  a  Business  Day,  the
applicable payment shall be due and payable on the first Business Day immediately preceding such Payment Date. Notwithstanding
the foregoing, “Payment Date” shall be subject to further adjustment in accordance with Section

nd

rd

th

th

th

th

th

th

th

2.2(b)(iii) hereof (in which case, for the avoidance of doubt, the proviso above shall apply to any such adjusted date).”

““Term  Loan  Maturity  Date”  means  March  31,  2025;  provided,  however,  that  the  Term  Loan  Maturity  Date  shall  be

decreased by the number of days equal to the Amortization Reduction Days if applicable in accordance with Section 5.7(c) hereof.”

““Term SOFR” means, for any day in any calendar month, the Term SOFR Reference Rate for a tenor of three (3) months
on the day (such day, the “Periodic Term SOFR Determination Day”) that is [**] prior to the first day of such Interest Period, as
such rate is published by the Term SOFR Administrator; provided, however, that if as of [**] (New York City time) on any Periodic
Term SOFR Determination Day the Term SOFR Reference Rate for the applicable tenor has not been published by the Term SOFR
Administrator  and  a  Benchmark  Replacement  Date  with  respect  to  the  Term  SOFR  Reference  Rate  has  not  occurred,  then  Term
SOFR will be the Term SOFR Reference Rate for such tenor as published by the Term SOFR Administrator on the first preceding
U.S.  Government  Securities  Business  Day  for  which  such  Term  SOFR  Reference  Rate  for  such  tenor  was  published  by  the  Term
SOFR Administrator so long as such first preceding U.S. Government Securities Business Day is not more than [**] prior to such
Periodic Term SOFR Determination Day.”

Notice” in Section 13.1 of the Existing Loan Agreement.

k. The Existing Loan Agreement shall be amended by deleting in its entirety the definition of “Delayed Amortization

Section 13.1 of the Existing Loan Agreement:

l. The Existing Loan Agreement shall be amended by adding, in alphabetical order, each of the following definitions to

““Fourth Amendment Effective Date” means October 31, 2023.”

““[**]” means [**]”

““[**]” means: [**]”

““[**]” is defined in Section 2.2(b)(ii).”

3.

Representations and Warranties; Reaffirmation; Covenant to Deliver.

a.

Borrower hereby represents and warrants to each Lender and the Collateral Agent as follows:

i. Borrower  has  all  requisite  power  and  authority  to  enter  into  this  Amendment  and  to  carry  out  the

transactions contemplated hereby.

ii.This  Amendment  has  been  duly  executed  and  delivered  by  Borrower  and  is  the  legally  valid  and  binding
obligation of Borrower, enforceable against Borrower in accordance with its respective terms, except as such
enforceability may be limited by bankruptcy, insolvency, reorganization, moratorium or similar laws relating
to or limiting creditors’ rights generally or by general principles of equity.

iii.

The  execution,  delivery  and  performance  by  Borrower  of  this  Amendment  have  been  duly
authorized and do not: (A) contravene the terms of any of Borrower’s Operating Documents; (B) violate any
Requirements  of  Law,  except  to  the  extent  that  such  violation  could  not,  individually  or  in  the  aggregate,
reasonably be expected to result in a

Material  Adverse  Change;  (C)  conflict  with  or  result  in  any  breach  or  contravention  of,  or  require  any
payment to be made under any provision of any security issued by Borrower or of any agreement, instrument
or  other  undertaking  to  which  Borrower  is  a  party  or  affecting  Borrower  or  the  assets  or  properties  of
Borrower or any of its Subsidiaries or any order, writ, judgment, injunction, decree, determination or award
of any Governmental Authority by which Borrower or any of its assets or properties are subject, except to
the extent that such conflict, breach, contravention or payment could not, individually or in the aggregate,
reasonably be expected to result in a Material Adverse Change; (D) require any Governmental Approval, or
other  action  by,  or  notice  to,  or  filing  with,  any  Governmental  Authority  (except  such  Governmental
Approvals or other actions, notices and filings which have been duly obtained, taken, given or made on or
before  the  Fourth  Amendment  Effective  Date  and  are  in  full  force  and  effect);  (E)  require  any  approval,
consent, exemption or authorization, or other action by, or notice to, or filing with, any Person other than a
Governmental Authority, including Borrower’s stockholders, members or partners, (except such approvals,
consents, exemptions, authorizations, actions, notices and filings which have been or will be duly obtained,
taken, given or made on or before the Fourth Amendment Effective Date and are in full force and effect),
except  for  those  approvals,  consents,  exemptions,  authorizations  or  other  actions,  notices  or  filings,  the
failure  of  which  to  obtain  or  make  could  not,  individually  or  in  the  aggregate,  reasonably  be  expected  to
result in a Material Adverse Change; or (F) constitute a material breach of or a material default under (which
such  default  has  not  been  cured  or  waived)  or  an  event  of  default  (or  the  equivalent  thereof,  however
described) under, or could reasonably be expected to give rise to the cancellation, termination or invalidation
of or the acceleration of Borrower’s or any Subsidiary’s obligations under, any Material Contract.

iv.

Both before and immediately after giving effect to this Amendment, no Event of Default or Default

has occurred and is continuing.

b.

Borrower hereby ratifies, confirms, reaffirms, and acknowledges its obligations under the Loan Documents to which
it  is  a  party  and  agrees  that  the  Loan  Documents  remain  in  full  force  and  effect,  undiminished  by  this  Amendment,  except  as  expressly
provided  herein.  By  executing  this  Amendment,  Borrower  acknowledges  that  it  has  read,  consulted  with  its  attorneys  regarding,  and
understands, this Amendment.

c.

Borrower hereby agrees to deliver to the Collateral Agent, within here (3) Business Days of the Fourth Amendment
Effective  Date,  originally-signed  copies  of  the  Amended  and  Restated  Tranche  A  Notes,  in  the  form  attached  as  Exhibit  B-1  hereto,  in
replacement of the Tranche A Notes, dated June 30, 2023, issued by Borrower to each Lender (whereupon, the Tranche A Notes, dated June
30, 2023, issued by Borrower to the each Lender shall be treated as cancelled and of no further force or effect and the Lenders shall promptly
destroy  any  and  all  copies  or  originals  of  such  Tranche  A  Notes  and  confirm  the  same  by  email  to  Borrower),  the  failure  of  which  such
delivery constitutes an Event of Default for all purposes under the Loan Agreement.

4.

References to and Effect on Loan Agreement. Except as specifically set forth herein, this Amendment shall not modify or
in any way affect any of the terms, conditions, covenants, representations and warranties contained in the Loan Agreement, or any of the
rights of the Lenders and the Collateral Agent therein, which shall remain in full force and effect and are hereby ratified and confirmed in all
respects. Except as specifically set forth herein, the execution, delivery and effectiveness

of  this  Amendment  shall  not  directly  or  indirectly  (i)  constitute  a  consent  or  waiver  of  any  past,  present  or  future  breaches,  violations  or
defaults of or under any provisions of the Loan Agreement nor constitute a novation of any of the Obligations under the Loan Agreement, (ii)
amend, modify or operate as a waiver of any provision of the Loan Agreement or any right, power or remedy of any Lender or the Collateral
Agent, or (iii) constitute a course of dealing or other basis for altering the Loan Agreement or any other Loan Document. Except as set forth
herein,  each  of  the  Lenders  and  the  Collateral  Agent  reserves  all  of  its  rights,  powers,  and  remedies  under  the  Loan  Documents  and
Requirements  of  Law.  On  and  after  the  Fourth  Amendment  Effective  Date,  all  references  in  the  Loan  Agreement  to  “this  Agreement,”
“hereto,” “hereof,” “hereunder,” or words of like import shall mean the Loan Agreement as amended by this Amendment.

5.

Successors and Assigns. This Amendment binds and is for the benefit of Borrower, the other Credit Parties, Lenders and

Collateral Agent and each of their respective successors and permitted assigns.

6.

Governing Law; Venue; Jury Trial Waiver. This Amendment shall be construed in accordance with and governed by the
law of the State of New York. The provisions of Section 10 (Choice of law, Venue and Jury Trial Waiver Etc.) of the Loan Agreement shall
apply hereto as if more fully set forth herein as if references therein to “this Agreement” were references to this Amendment.

7.

Counterparts.  This  Amendment  may  be  executed  in  any  number  of  counterparts  and  by  different  parties  on  separate
counterparts, each of which, when executed and delivered, is an original, and all taken together, constitute one Amendment. Delivery of an
executed  counterpart  of  a  signature  page  of  this  Amendment  by  facsimile  or  other  electronic  imaging  means  (e.g.  “pdf”  or  “tif”)  shall  be
effective as delivery of a manually executed counterpart of this Amendment. The words “execution,” “signed,” “signature,” and words of like
import in this Amendment shall be deemed to include electronic signatures or electronic records, each of which shall be of the same legal
effect, validity or enforceability as a manually executed signature or the use of a paper-based recordkeeping system, as the case may be, to
the extent and as provided for under any applicable law, including the Federal Electronic Signatures in Global and National Commerce Act,
the New York State Electronic Signatures and Records Act, or any other similar state laws based on the Uniform Electronic Transactions Act.

8.

Conflict. In the event of any conflict between any term, covenant, or condition of this Amendment and any term, covenant or

condition of the Loan Agreement, the provisions of the Loan Agreement shall control and govern.

[Remainder of Page Intentionally Left Blank]

IN WITNESS WHEREOF, the undersigned hereto have caused this Amendment to be executed as of the date first written above by

each of their officers thereunto duly authorized.

BORROWER (on its own behalf and on behalf of each other Credit Party):

AKEBIA THERAPEUTICS, INC.,
a Delaware corporation

By:/s/ Ellen Snow                
Name: Ellen Snow
Title: Chief Financial Officer

[Signature page to Fourth Amendment]

BIOPHARMA CREDIT PLC,
as Collateral Agent

By: Pharmakon Advisors, LP,
    its Investment Manager

    By: Pharmakon Management I, LLC,
    its General Partner

By__/s/ Pedro Gonzalez de Cosio______________
Name: Pedro Gonzalez de Cosio
Title: Managing Member

BPCR LIMITED PARTNERSHIP,
as a Lender

By: Pharmakon Advisors, LP,
    its Investment Manager

    By: Pharmakon Management I, LLC,
    its General Partner

By__/s/ Pedro Gonzalez de Cosio______________
Name: Pedro Gonzalez de Cosio
Title: Managing Member

BIOPHARMA CREDIT INVESTMENTS V (MASTER) LP,
as Lender

 
 
 
 
By:    BioPharma Credit Investments V GP LLC,
    its general partner

    By: Pharmakon Advisors, LP,
    its Investment Manager

By__/s/ Pedro Gonzalez de Cosio______________
Name: Pedro Gonzalez de Cosio
Title: CEO and Managing Member

Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of information that the registrant
treats as private or confidential. Double asterisks denote omissions.

Exhibit 10.102
Execution Version

AGREEMENT FOR THE PROVISION OF A LOAN FACILITY

Dated January 29, 2024 (the “Closing Date”)

Between

KREOS CAPITAL VII (UK) LIMITED,

and

AKEBIA THERAPEUTICS, INC.

 
Page

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20
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27
38
41
44
44
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46

TABLE OF CONTENTS

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.

DEFINITIONS
INTERPRETATION
LOAN FACILITY
TERM
REPAYMENT AND PREPAYMENT
INTEREST
REPRESENTATIONS AND WARRANTIES
UNDERTAKINGS
EVENTS OF DEFAULT
FEES, EXPENSES AND TAXES
INDEMNITIES
[RESERVED]
RELEASE OF SECURITY
NOTICES
GENERAL

SCHEDULE A – FORM OF DRAWDOWN NOTICE
SCHEDULE B – FORM OF COMPLIANCE CERTIFICATE
SCHEDULE C – POST-CLOSING OBLIGATIONS
SCHEDULE D – EXISTING FINANCIAL INDEBTEDNESS
SCHEDULE E – EXISTING INVESTMENTS
SCHEDULE F – EXISTING SECURITY INTERESTS
SCHEDULE G – PERMITTED LICENSES
SCHEDULE H – DISCLOSURES TO REPRESENTATIONS AND WARRANTIES
EXHIBIT A-1 – FORM OF U.S. TAX COMPLIANCE CERTIFICATE
EXHIBIT A-2 – FORM OF U.S. TAX COMPLIANCE CERTIFICATE
EXHIBIT A-3 – FORM OF U.S. TAX COMPLIANCE CERTIFICATE
EXHIBIT A-4 – FORM OF U.S. TAX COMPLIANCE CERTIFICATE

i

AGREEMENT FOR THE PROVISION OF A LOAN FACILITY

Dated __________________ 2024 (the “Closing Date”)

Between

KREOS  CAPITAL  VII  (UK)  LIMITED,  a  company  incorporated  in  England  and  Wales  under  registration  number  13611522  whose  registered  office  is  at  25-28  Old
Burlington Street, London W1S 3AN, as a Lender (the "Lender Representative", which expression shall include its permitted successors and permitted assigns);

and

AKEBIA THERAPEUTICS, INC., a Delaware corporation (the "Borrower Representative") and any wholly-owned domestic subsidiary of the Borrower Representative (if
any)  that  may  from  time  to  time  after  the  date  hereof  be  joined  to  this  Loan  Agreement  as  an  additional  Borrower  pursuant  to  a  joinder  (in  form  and  substance  reasonably
acceptable to the Lender) executed by such additional Borrower and the Lender Representative (the Borrower Representative and each such wholly-owned domestic subsidiary
of the Borrower Representative (if any) who so becomes a Borrower hereunder, each individually a “Borrower” and together the “Borrowers”).

WHEREAS:

1.    The Borrowers wish to borrow up to the Total Loan Facility (as defined below) and the Lender wishes to make the Total Loan Facility available to the Borrowers subject to

the terms of this agreement (this "Loan Agreement"); and

2.    Each Borrower hereby confirms that on or about the date of this Loan Agreement it (and it shall procure each relevant Subsidiary Guarantor) shall enter into the Initial

Security and Guarantee Documents as security for the obligations of the Loan Parties under the Loan Documents.

LOAN FACILITY TERMS:

Total Loan Facility

Expiry Date

Advance Payments

Interest and Amortization

$55,000,000, to be drawn down as follows:

Tranche A: $37,000,000, to be drawn in full on the Closing Date

Tranche B: $8,000,000

Tranche C: $10,000,000

In relation to the ability to drawdown a Tranche, the Expiry Date with respect to
each Tranche is as follows:

Tranche A: the Closing Date

Tranche B: December 31, 2024

Tranche C: December 31, 2024

In  relation  to  each  Tranche,  the  repayment  amount  (comprising  principal  and
interest) for such Tranche for the last Month of the Loan Term for such Tranche as
set  out  in  the  Repayment  Schedule  (assuming  the  Vadadustat  FDA  Approval  has
been obtained and 24-month amortization).

During the Interest Only Period, the Borrowers shall make payments of interest on
each applicable Tranche in accordance with Clause 5.1.1 and Clause 6.1.

After  the  Interest  Only  Period,  the  Borrowers  shall  make  payments  of  principal
and interest on each applicable Tranche in accordance with Clause 5.1.1.

Notwithstanding the foregoing:

A.        if the Vadadustat FDA Approval is not received on or prior to June 30,
2024,  the  Interest  Only  Period  will  terminate  on  October  1,  2024,
followed  by  7  equal  payments  of  principal  and  interest,  which  shall
continue to accrue and become due and payable in accordance with the
terms hereof (for the avoidance of doubt, the first 6 such payments shall
be due on October 1, 2024 and each Monthly Payment Date thereafter
through  and  including  March  1,  2025,  with  the  seventh  and  final  such
payment due on the Maturity Date); and

B.    if a Vadadustat Withdrawal Event occurs, the Borrowers shall repay, in
advance,  all  principal  and  interest  in  respect  of  each  Tranche  in  equal
payments  on  (1)  each  of  the  twelve  immediately  succeeding  Monthly
Repayment  Dates  or  (2)  if  less  than  twelve  Monthly  Repayment  Dates
remain  before  the  Maturity  Date,  each  such  Monthly  Repayment  Date
remaining before the Maturity Date, in each case commencing with the
first  Monthly  Repayment  Date  to  occur  after  the  occurrence  of  such
Vadadustat  Withdrawal  Event  (as  an  illustrative  example,  if,  after  the
occurrence  of  such  Vadadustat  Withdrawal  Event,  five  Monthly
Repayment Dates remain before the Maturity Date, the Borrowers shall
repay all outstanding principal and interest in five equal payments: one
on each such Monthly Repayment Date).

1

Loan Term

Transaction Fee

End of Loan Payments

Minimum Drawdown Amount

1.    DEFINITIONS

The  Total  Loan  Facility  will  mature  on  March  31,  2025;  provided,  that  if  the
Borrower  Representative  receives  the  Vadadustat  FDA  Approval  on  or  prior  to
June  30,  2024,  the  maturity  date  will  be  automatically  extended  to  January  29,
2028 (such applicable date, the “Maturity Date”).

Tranche A:  [**]%  of  the  aggregate  committed  amount  in  respect  of  Tranche  A,
payable upon the Closing Date.

Tranche B:  [**]%  of  the  aggregate  committed  amount  in  respect  of  Tranche  B,
which shall be payable as follows:

(a)  on  the  Closing  Date,  [**]%  of  the  aggregate  committed  amount  in
respect of Tranche B, and

(b) [**]% of the aggregate committed amount in respect of Tranche B as
of  the  Closing  Date  shall  be  payable  on  the  earliest  to  occur  of  (i)  the
date Tranche B is funded, (ii) the date that the commitments in respect
of Tranche B are terminated or cancelled and (iii) the date on which the
availability period of Tranche B terminates.

Tranche  C:  [**]%  of  the  aggregate  committed  amount  in  respect  of  Tranche  C,
which shall be payable as follows:

(a)  on  the  Closing  Date,  [**]%  of  the  aggregate  committed  amount  in
respect of Tranche C, and

(b) [**]% of the aggregate committed amount in respect of Tranche C as
of  the  Closing  Date  shall  be  payable  on  the  earliest  to  occur  of  (i)  the
date Tranche C is funded, (ii) the date that the commitments in respect
of Tranche C are terminated or cancelled and (iii) the date on which the
availability period of Tranche C terminates.

In  relation  to  each  Tranche,  [**]%  of  the  amount  funded  pursuant  to  the  relevant
Tranche, which amount shall be due and payable in accordance with Clause 10.2.
$[**]

In this Loan Agreement, including the recitals set out above, unless otherwise defined:

1.1    “Acquisition Consideration Condition”  means,  as  of  any  date  of  determination,  a  condition  that  is  satisfied  if  (a)  Cash  Flow  as  of  the  last  day  of  the  month  most
recently ended is greater than $0 and (b) the Borrower Representative has delivered to the Lender Representative Pro Forma Projections demonstrating aggregate
Cash Flow greater than $0 for the last three months of the period covered by such Pro Forma Projections (taken as a whole);

1.2    "Adjusted Term SOFR" means, for purposes of any calculation, the rate per annum equal to the greater of (a) 4.25% per annum and (b) Term SOFR for such calculation;

1.3    "Advance Payment" has the meaning given in Clause 5.3 and is in the amount set forth in the Loan Facility Terms;

1.4    "Affiliate" means, in relation to any person, (i) any other person directly or indirectly owned by or controlled by such person, including subsidiaries, or (ii) any person that
directly or indirectly owns or controls such person, including holding companies (it being understood that in no event shall the Lender be deemed to be an Affiliate of
Borrower or any of its Subsidiaries);

1.5    "Affected Financial Institution" means (a) any EEA Financial Institution or (b) any UK Financial Institution.

1.6    "Anti-Corruption Laws" means the UK Bribery Act 2010, the US Foreign Corrupt Practices Act 1977 and/or any other applicable anti-bribery or anti-corruption law, in

each case as amended, re-enacted, consolidated or replaced;

1.7    "Anti-Money Laundering Laws" means any and all laws applicable to any Borrower or any other Group Company from time to time concerning or relating to terrorism

financing or money laundering;

1.8    "Applicable Interest Rate" has the meaning given in Clause 6.2;

2

1.9    "Asset Sale" means any sale, conveyance, transfer or other disposition of assets or properties of a Group Company pursuant to clause 8.2.1(xv);

1.10    "Assignee" has the meaning given in Clause 15.5;

1.11    "Available Tenor" means, as of any date of determination and with respect to the then-current Benchmark, as applicable, (a) if such Benchmark is a term rate, any tenor
for such Benchmark (or component thereof) that is or may be used for determining the length of an interest period pursuant to this Loan Agreement or (b) otherwise,
any payment period for interest calculated with reference to such Benchmark (or component thereof) that is or may be used for determining any frequency of making
payments of interest calculated with reference to such Benchmark pursuant to this Loan Agreement, in each case, as of such date;

1.12    “Bail-In Action” means the exercise of any Write-Down and Conversion Powers by the applicable Resolution Authority in respect of any liability of an Affected Financial

Institution;

1.13    “Bail-In Legislation” means, (a) with respect to any EEA Member Country implementing Article 55 of Directive 2014/59/EU of the European Parliament and of the
Council of the European Union, the implementing law, rule, regulation or requirement for such EEA Member Country from time to time which is described in the EU
Bail-In Legislation Schedule, and (b) with respect to the United Kingdom, Part I of the United Kingdom Banking Act 2009 (as amended from time to time) and any
other law, regulation or rule applicable in the United Kingdom relating to the resolution of unsound or failing banks, investment firms or other financial institutions or
their affiliates (other than through liquidation, administration or other insolvency proceedings);

1.14    "Benchmark" means, initially, the Term SOFR Reference Rate; provided that if a Benchmark Transition Event has occurred with respect to the Term SOFR Reference
Rate  or  the  then-current  Benchmark,  then  "Benchmark"  shall  mean  the  applicable  Benchmark  Replacement  to  the  extent  that  such  Benchmark  Replacement  has
replaced such prior benchmark rate pursuant to Clause 6.4;

1.15    "Benchmark Floor" shall mean the benchmark rate floor provided in this Loan Agreement (as of the execution of this Loan Agreement, the modification, amendment or

renewal of this Loan Agreement or otherwise) with respect to Term SOFR. As of the Closing Date the Benchmark Floor is equal to 4.25% per annum;

1.16    "Benchmark Replacement" means the sum of: (a) the alternate benchmark rate that has been selected by the Lender Representative and the Borrowers giving due
consideration to (i) any selection or recommendation of a replacement rate or the mechanism for determining such a rate by the Relevant Governmental Body or (ii)
any  evolving  or  then-prevailing  market  convention  for  determining  a  rate  of  interest  as  a  replacement  to  the  then-current  Benchmark  for  Dollar-denominated
syndicated credit facilities and (b) the Benchmark Replacement Adjustment; provided that, if the Benchmark Replacement as so determined would be less than the
Benchmark Floor on any date of determination, the Benchmark Replacement will be deemed to be the Benchmark Floor for the purposes of this Loan Agreement and
the other Loan Documents;

1.17    "Benchmark Replacement Adjustment" means, with respect to any replacement of the then-current Benchmark with an Unadjusted Benchmark Replacement for
each applicable Interest Period, the spread adjustment, or method for calculating or determining such spread adjustment (which may be a positive or a negative value
or  zero),  that  has  been  selected  by  the  Lender  Representative  and  the  Borrowers  giving  due  consideration  to  (a)  any  selection  or  recommendation  of  a  spread
adjustment, or method for calculating or determining such spread adjustment, for the replacement of such Benchmark with the applicable Unadjusted Benchmark
Replacement  by  the  Relevant  Governmental  Body  or  (b)  any  evolving  or  then-prevailing  market  convention  for  determining  a  spread  adjustment,  or  method  for
calculating or determining such spread adjustment, for the replacement of such Benchmark with the applicable Unadjusted Benchmark Replacement for U.S. dollar-
denominated syndicated credit facilities at such time;

1.18        "Benchmark  Replacement  Conforming  Changes"  means,  with  respect  to  any  Benchmark  Replacement,  any  technical,  administrative  or  operational  changes
(including changes to the definition of "Business Day", timing and frequency of determining rates and making payments of interest and other administrative matters)
that  the  Lender  Representative  (in  consultation  with  the  Borrower)  decides  may  be  appropriate  to  reflect  the  adoption  and  implementation  of  such  Benchmark
Replacement  and  to  permit  the  administration  thereof  by  the  Lender  Representative  in  a  manner  substantially  consistent  with  market  practice  (or,  if  the  Lender
Representative  (in  consultation  with  the  Borrower)  decides  that  adoption  of  any  portion  of  such  market  practice  is  not  administratively  feasible  or  if  the  Lender
Representative  (in  consultation  with  the  Borrower)  determines  that  no  market  practice  for  the  administration  of  the  Benchmark  Replacement  exists,  in  such  other
manner  of  administration  as  the  Lender  Representative  reasonably  determines  is  necessary  in  connection  with  the  administration  of  this  Loan  Agreement  and  the
other Loan Documents);

1.19    "Benchmark Replacement Date" means the earlier to occur of the following events with respect to the then-current Benchmark: (a) in the case of clause (a) or (b) of
the definition of "Benchmark Transition Event", the later of (i) the date of the public statement or publication of information referenced therein and (ii) the date on
which  the  administrator  of  such  Benchmark  permanently  or  indefinitely  ceases  to  provide  such  Benchmark;  or  (b)  in  the  case  of  clause  (c)  of  the  definition  of
"Benchmark Transition Event", the date of the public statement or publication of information referenced therein;

1.20    "Benchmark Transition Event" means the occurrence of one or more of the following events with respect to then-current Benchmark:

(a)    a public statement or publication of information by or on behalf of the administrator of such Benchmark (or the published component used in the calculation
thereof) announcing that such administrator has ceased or will cease to provide all Available Tenors of such Benchmark (or such component thereof), permanently or
indefinitely; provided that,

3

at  the  time  of  such  statement  or  publication,  there  is  no  successor  administrator  that  will  continue  to  provide  any  Available  Tenor  of  such  Benchmark  (or  such
component thereof);

(b)    a public statement or publication of information by the regulatory supervisor for the administrator of such Benchmark (or the published component used in the
calculation  thereof),  the  Term  SOFR  Administrator,  the  U.S.  Federal  Reserve  System,  an  insolvency  official  with  jurisdiction  over  the  administrator  of  such
Benchmark, a resolution authority with jurisdiction over the administrator of such Benchmark (or such component) or a court or an entity with similar insolvency or
resolution authority over the administrator of such Benchmark (or such component), which states that the administrator of such Benchmark (or such component) has
ceased or will cease to provide all Available Tenors of such Benchmark (or such component thereof) permanently or indefinitely; provided that, at the time of such
statement or publication, there is no successor administrator that will continue to provide any Available Tenor of such Benchmark (or such component thereof); or

(c)        a  public  statement  or  publication  of  information  by  or  on  behalf  of  the  regulatory  supervisor  for  the  administrator  of  such  Benchmark  (or  the  published
component  used  in  the  calculation  thereof  or  the  regulatory  supervisor  for  the  administrator  of  such  Benchmark  or  such  component  thereof)  announcing  that  all
Available Tenors of such Benchmark are no longer representative;

1.21    "Benchmark Transition Start Date" means in the case of a Benchmark Transition Event, the earlier of (a) the applicable Benchmark Replacement Date and (b) if such
Benchmark Transition Event is a public statement or publication of information of a prospective event, the [**] prior to the expected date of such event as of such
public statement or publication of information (or if the expected date of such prospective event is fewer than [**] after such statement or publication, the date of such
statement or publication);

1.22    "Benchmark Unavailability Period" means, if a Benchmark Transition Event and its related Benchmark Replacement Date have occurred with respect to the then-
current Benchmark and solely to the extent that such Benchmark has not been replaced with a Benchmark Replacement in accordance with Clause 6.4, the period (a)
beginning at the time that such Benchmark Replacement Date has occurred and (b) ending at the time that a Benchmark Replacement has replaced the then-current
Benchmark for all purposes hereunder pursuant to Clause 6.4;

1.23    "Board" means the Board of Governors of the Federal Reserve System of the United States of America and any successor thereto;

1.24    "Business Day" means (a) any day on which banks are generally open for business in London and New York other than a Saturday or Sunday and (b) with respect to the
calculation  of  Term  SOFR,  any  day  other  than  a  day  on  which  the  Securities  Industry  and  Financial  Market  Association  recommends  that  the  fixed  income
departments of its members be closed for the entire day for purposes of trading in United States government securities;

1.25    “Cash Equivalents” means:

(a) direct obligations of, or obligations the principal of and interest on which are unconditionally guaranteed by, the United States of America (or by any agency thereof
to the extent such obligations are backed by the full faith and credit of the United States of America), in each case maturing within two years from the date of issuance
thereof;

(b)  investments  in  commercial  paper  maturing  within  2  years  from  the  date  of  issuance  thereof  and  having,  at  such  date  of  acquisition,  the  highest  credit  rating
obtainable from S&P or from Moody’s;

(c) investments in certificates of deposit, banker’s acceptances and time deposits maturing within two years from the date of acquisition thereof issued or offered by or
guaranteed by or placed with, and money market deposit accounts issued or offered by, any domestic office of any commercial bank organized under the laws of the
United States of America or any State thereof that has a combined capital and surplus and undivided profits of not less than $100,000,000 and that issues (or the
parent of which issues) commercial paper rated at least “Prime 1” (or the then equivalent grade) by Moody’s or “A1” (or the then equivalent grade) by S&P;

(d)  fully  collateralized  repurchase  agreements  with  a  term  of  not  more  than  30  days  for  securities  described  in  clause  (a)  above  and  entered  into  with  a  financial
institution satisfying the criteria of clause (c) above;

(e) corporate obligations, including intermediate-term notes rated “A2/A” or higher by Moody’s and Standard and Poor’s and commercial paper rated “P1” or higher
by Moody’s and “A1” or higher by Standard and Poor’s;

(f)  bank  sweep  or  deposit  programs  and  interest  bearing  programs  from  banks  with  a  minimum  $10,000,000,000  market  capitalization  and  whose  debt  ratings
satisfying the criteria of clause (c) or (e) above;

(g) U.S. and dollar-denominated international corporate debt as long as the issuer meets credit rating and marketability guidelines; and

(h) investments in “money market funds” within the meaning of Rule 2a-7 of the Investment Company Act of 1940, as amended, substantially all of whose assets are
invested in investments of the type described in clauses (a) through (g) above;

1.26    “Cash Flow” means the cash flow of the Borrower Representative and its consolidated Subsidiaries, determined in accordance with GAAP, excluding non-recurring or

extraordinary events and non-cash items.

4

1.27    “Cash Interest Condition” means, on any date of determination, a condition that is satisfied if Cash Flow as of the last day of each of the immediately preceding six

months was greater than $0 for each such month;

1.28    "Casualty Event"  means  any  casualty  or  other  insured  damage  to,  or  any  taking  under  power  of  eminent  domain  or  by  condemnation  or  similar  proceeding  of,  any

property or asset of the Borrowers or any other Group Company;

1.29    "Change of Control" has the meaning as given in Clause 9.1.9;

1.30    "Code" means the Internal Revenue Code of 1986, as amended from time to time;

1.31    "Collateral" means all the "Collateral" as defined in any of the Security Documents and shall also include the Mortgaged Properties;

1.32    "Compliance Certificate" has the meaning given to it in Clause 8.1.9(iv);

1.33    "Confidential Information" means all information relating to any Group Company, the Loan Documents or a Loan of which the Lender becomes aware or which the
Lender receives in its capacity as the Lender from any member of the Group or any of its advisers in whatever form but excludes information that: (i) is or becomes
public information other than as a direct or indirect result of any breach by the Lender of this Loan Agreement; (ii) is identified in writing at the time of delivery as
non-confidential by any member of the Group or any of its advisers; or (iii) is known by the Lender before the date the information is disclosed to it or is lawfully
obtained by the Lender after that date, from a source which is, as far as the Lender is aware, unconnected with the Group and which, in either case, as far as the Lender
is aware, has not been obtained in breach of, and is not otherwise subject to, any obligation of confidentiality;

1.34    “Connection Income Taxes” means Other Connection Taxes that are imposed on or measured by net income (however denominated) or that are franchise Taxes or

branch profits Taxes.

1.35    "Contractual Currency" has the meaning given to it in Clause 5.2;

1.36    "Control" shall mean the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of a Person, whether through the

ownership of voting securities, by contract or otherwise, and the terms “Controlling” and “Controlled” shall have meanings correlative thereto.

1.37    "Controlled Foreign Subsidiary"  means  any  Subsidiary  of  the  Borrower  Representative  or  of  any  Subsidiary  Guarantor  that  is  a  “  controlled  foreign  corporation”

within the meaning of Section 957 of the Code as in effect on the date hereof.

1.38    "Default" means an Event of Default or any event or circumstance specified in Clause 9.1 which would (with the expiry of a grace period, the giving of notice, the making

of any determination under the Loan Documents or any combination of the foregoing) be an Event of Default;

1.39    "Designated Jurisdiction" means, at any time, any country, region or territory which is itself the subject or target of comprehensive Sanctions (which shall include, as
at  the  date  of  this  Loan  Agreement  Cuba,  Iran,  North  Korea,  Syria,  the  Crimea  region  of  Ukraine,  the  so-called  Donetsk  People’s  Republic  and  Luhansk  People’s
Republic);

1.40    "Domestic Subsidiary" means any Subsidiary of the Borrower Representative that is organized under the laws of the United States, any state thereof or the District of

Columbia.

1.41    "Drawdown" means the drawdown of a Tranche;

1.42    "Drawdown Account" means the deposit account ending [**] maintained with [**];

1.43    "Drawdown Date" means, subject to Clauses 3.2.1 and 3.2.2, the date specified by the Borrower Representative in the relevant Drawdown Notice or as may be otherwise

agreed in writing by the Borrower Representative and the Lender Representative;

1.44    "Drawdown Notice" means a drawdown notice served in accordance with Clause 3.2 in substantially the form attached to this Loan Agreement as Schedule A (as may be

amended with the prior written consent of the Lender Representative);

1.45    “EEA Financial Institution” means (a) any credit institution or investment firm established in any EEA Member Country which is subject to the supervision of an EEA
Resolution Authority, (b) any entity established in an EEA Member Country which is a parent of an institution described in clause (a) of this definition, or (c) any
financial institution established in an EEA Member Country which is a subsidiary of an institution described in clause (a) or (b) of this definition and is subject to
consolidated supervision with its parent.

1.46    “EEA Member Country” shall mean any of the member states of the European Union, Iceland, Liechtenstein and Norway.

1.47    “EEA Resolution Authority” shall mean any public administrative authority or any person entrusted with public administrative authority of any EEA Member Country

(including any delegee) having responsibility for the resolution of any EEA Financial Institution.

5

1.48    "End of Loan Payment" means the End of Loan Payment in the amount set forth in the Loan Facility Terms;

1.49    "Environmental Law" means any applicable law or regulation which relates to pollution, protection of the environment, the conditions of the workplace (to the extent

relating to exposure to Hazardous Materials) or the generation, handling, storage, use, release or spillage of Hazardous Materials;

1.50    "ERISA"  means  the  Employee  Retirement  Income  Security  Act  of  1974,  as  the  same  may  be  amended  from  time  to  time,  and  the  rules  and  regulations  promulgated

thereunder;

1.51    "ERISA Affiliate" shall mean any trade or business (whether or not incorporated) that, together with the Borrower Representative, is treated as a single employer under
Section 414(b) or (c) of the Code, or solely for purposes of Section 302 of ERISA and Section 412 of the Code, is treated as a single employer under Sections 414(m) or
(o) of the Code;

1.52    "ERISA Event" shall mean (a) any “reportable event”, as defined in Section 4043 of ERISA or the regulations issued thereunder, with respect to a Plan (other than an
event for which the 30-day notice period is waived), (b) the failure to satisfy the minimum funding standards (within the meaning of Section 412 of the Code or Section
302 of ERISA), whether or not waived or a determination that any Plan or Multiemployer Plan is, or would reasonably be expected to be, an at-risk plan or a plan in
endangered or critical status within the meaning of Section 430, 431 or 432 of the Code or Section 303, 304 or 305 of ERISA, (c) the filing pursuant to Section 412(c)
of the Code or Section 302(c) of ERISA of an application for a waiver of the minimum funding standard with respect to any Plan, (d) the incurrence by the Borrower
Representative or any of its ERISA Affiliates of any liability under Title IV of ERISA with respect to the termination of any Plan or the withdrawal or partial withdrawal
of the Borrower Representative or any of its ERISA Affiliates from any Plan or Multiemployer Plan, (e) the receipt by the Borrower Representative or any of its ERISA
Affiliates from the PBGC or a plan administrator of any notice relating to the intention to terminate any Plan or Plans or to appoint a trustee to administer any Plan, (f)
the failure by the Borrower Representative or any of its ERISA Affiliates to make a required contribution to any Plan that results in, or would reasonably be expected to
result in, the imposition of a lien or other encumbrance or the provision of security under Section 430 of the Code or Section 303 or 4068 of ERISA, (g) the receipt by
the  Borrower  Representative  or  any  of  its  ERISA  Affiliates  of  any  notice,  or  the  receipt  by  any  Multiemployer  Plan  from  the  Borrower  Representative  or  any  of  its
ERISA Affiliates of any notice, concerning the imposition of Withdrawal Liability or a determination that a Multiemployer Plan is, or is expected to be, insolvent or in
reorganization,  within  the  meaning  of  Title  IV  of  ERISA,  (h)  the  occurrence  of  a  non-exempt  “prohibited  transaction”  with  respect  to  which  the  Borrower
Representative or any of its Subsidiaries would reasonably be expected to be liable, (i) any other event or condition with respect to a Plan or Multiemployer Plan that
could result in liability of the Borrower Representative or any of its Subsidiaries or (j) a Foreign Benefit Event;

1.53    "Event of Default" means any of the events or circumstances described in Clause9.1;

1.54        "Excluded Accounts"  means  (1)  payroll,  healthcare  and  other  employee  wage  and  benefit  accounts,  (2)  sales,  payroll  and  similar  tax  trust  accounts,  (3)  escrow,
defeasance and redemption accounts, (4) fiduciary or trust accounts, (5) accounts located outside of the United States, (6) accounts used in connection with Medicaid
and Medicare in the ordinary course of business, (7) accounts used to cash collateralize letters of credit or other obligations to the extent permitted under this Loan
Agreement, (8) zero balance accounts and (9) accounts with an average daily balance of less than $[**] in the aggregate for all such accounts excluded pursuant to this
clause (9);

1.55    "Excluded Subsidiary" means any direct or indirect Subsidiary of the Borrower Representative that is (a) not wholly owned by the Borrower Representative or one or
more  wholly-owned  Subsidiaries  of  the  Borrower  Representative,  (b)  an  Immaterial  Subsidiary,  (c)  [reserved],  (d)  [reserved],  (e)  an  MSC,  (f)  a  Subsidiary  that  is
prohibited by applicable law, rule or regulation from guaranteeing the Loan Facility, or which would require governmental (including regulatory) consent, approval,
license  or  authorization  to  provide  a  guarantee  unless,  such  consent,  approval,  license  or  authorization  has  been  received,  (g)  a  Subsidiary  with  respect  to  which  a
guarantee  by  it  of  the  Loan  Facility  could  reasonably  be  expected  to  result  in  material  and  adverse  Tax  consequences  to  the  Borrower  Representative  and  its
Subsidiaries  (taken  as  a  whole)  as  reasonably  determined  by  the  Borrower  Representative  and  the  Lender  Representative,  (h)  a  Subsidiary  that  is  prohibited  from
guaranteeing the Loan Facility by any contractual obligation (to the extent such contractual restriction was not entered into in contemplation of the guarantee of the
Loan  Facility  by  such  Subsidiary),  (i)  not  for  profit  subsidiary  and  (j)  any  other  Subsidiary  with  respect  to  which,  in  the  reasonable  judgment  of  the  Lender
Representative and the Borrower, the cost or other consequences of guaranteeing the Loan Facility would be excessive in view of the benefits to be obtained by the
Lender therefrom; provided that no Excluded Subsidiary may own any equity interests issued by any Loan Party;

1.56    "Excluded Taxes" means any of the following Taxes imposed on or with respect to a Lender or required to be withheld or deducted from a payment to a Lender, (a)
Taxes imposed on or measured by net income (however denominated), franchise Taxes, and branch profits Taxes, in each case, (i) imposed as a result of such Lender
being organized under the laws of, or having its principal office or, in the case of any Lender, its applicable lending office located in, the jurisdiction imposing such Tax
(or any political subdivision thereof) or (ii) that are Other Connection Taxes, (b) U.S. federal withholding Taxes imposed on amounts payable to or for the account of
such Lender with respect to an applicable interest in a Loan or commitment pursuant to a law in effect on the date on which (i) such Lender acquires such interest in
the Loan or commitment or (ii) such Lender changes its lending office, except in each case to the extent that, pursuant to Clause 10.5, amounts with respect to such
Taxes were payable either to such Lender's assignor immediately before such Lender became a party hereto or to the Lender immediately before it changed its lending
office, (c) Taxes attributable to such Lender’s failure to comply with Clause 10.5.7 and (d) any withholding Taxes imposed under FATCA;

1.57    "Existing Financial Indebtedness" means the Financial Indebtedness listed on Schedule D to this Loan Agreement;

1.58    "Expiry Date" means the relevant date(s) in relation to the ability to draw down a Tranche set forth in the Loan Facility Terms;

6

1.59    "FATCA" means Sections 1471 through 1474 of the Code, as of the date of this Loan Agreement (or any amended or successor version that is substantively comparable and
not materially more onerous to comply with), any current or future regulations or official interpretations thereof, any agreements entered into pursuant to Section
1471(b)(1) of the Code and any fiscal or regulatory legislation, rules or practices adopted pursuant to any intergovernmental agreement, treaty or convention among
Governmental Authorities and implementing such Sections of the Code;

1.60    “Federal Funds Effective Rate” means, for any day, the weighted average of the rates on overnight Federal funds transactions with members of the Federal Reserve
System, as published on the next succeeding Business Day by the Federal Reserve Bank of New York, or, if such rate is not so published for any day that is a Business
Day, the average of the quotations for the day for such transactions received by the Lender from three Federal funds brokers of recognized standing selected by it;

1.61    "Financial Indebtedness" means, with respect to any person, without duplication: (i) monies borrowed and debit balances at banks or other financial institutions; (ii)
finance or capital leases, other than leases that would have been considered operating leases prior to the adoption of ASC 842; (iii) receivables sold or discounted, (iv)
other  transactions  or  arrangements  having  the  commercial  effect  of  borrowing  money;  (v)  the  marked  to  market  value  of  derivative  transactions  entered  into  in
connection with protection against or benefit from fluctuation in any rate or price; (vi) counter-indemnity obligations in respect of guarantees or other instruments
issued by a bank or financial institution; (vii) any acceptance under any acceptance credit or bill discounting facility, (viii) any amount of any liability under an advance
or deferred purchase agreement if the primary reason is to raise finance or to finance an acquisition or construction of the asset or service in question or the agreement
is in respect of the supply of assets or services, (ix) liabilities under guarantees or indemnities for any of the obligations referred to in items (i) to (viii), and (x) any
shares which are redeemable (other than at the option of the issuer) before the expiry of the Loan Term (provided that (A) if such shares are issued to any employee or
to any plan for the benefit of employees of the Borrower Representative or its Subsidiaries or by any such plan to such employees, such shares shall not constitute
Financial Indebtedness solely because they may be required to be repurchased by the Borrower or its Subsidiaries in order to satisfy applicable statutory or regulatory
obligations or as a result of such employee’s termination, death or disability and (B) any class of shares of such person that by its terms authorizes such person to
satisfy its obligations thereunder by delivery of shares that are not Financial Indebtedness shall not be deemed to be Financial Indebtedness), in each case of clauses (i)
through (x), to the extent that such item would appear as a liability on a balance sheet of such person prepared in accordance with GAAP;

Notwithstanding the foregoing, in no event shall the following constitute Financial Indebtedness:

(a)    prepaid or deferred revenue arising in the ordinary course of business;

(b)    operating leases;

(c)    in connection with the purchase by a Group Company of any business, any post-closing payment adjustments to which the seller may become entitled to the
extent  such  payment  is  determined  by  a  final  closing  balance  sheet  or  such  payment  depends  on  the  performance  of  such  business  after  the  closing;
provided, however, that, at the time of closing, the amount of any such payment is not determinable and such amount does not appear as a liability on the
balance sheet of such Group Member prepared in accordance with GAAP;

(d)        any  obligations  in  respect  of  workers’  compensation  claims,  early  retirement  or  termination  obligations,  deferred  compensatory  or  employee  or  director

equity plans, pension fund obligations or contributions or similar claims, obligations or contributions or social security or wage taxes;

(e)    any Warrant Instrument or any Permitted Convertible Debt Call Transaction; or

(f)    the [**].

1.62    "Financial Officer" of any person shall mean the chief executive officer, president, chief financial officer, principal accounting officer, treasurer, or similar officer of such

person;

1.63    "Financial Statements" means, in relation to the Borrower Representative, the audited consolidated financial statements of the Group for the period ended December

31;

1.64    "First Monthly Repayment Date" shall mean the first Monthly Repayment Date being either (i) the first Drawdown Date (where the Drawdown Date is the first day of
a calendar month); or (ii) the first day of the next calendar month following the first Drawdown Date (where the first Drawdown Date is not the first day of a calendar
month);

1.65    "Foreign Benefit Event" shall mean, with respect to any Foreign Pension Plan, (a) the existence of unfunded liabilities in excess of the amount permitted under any
applicable law, or in excess of the amount that would be permitted absent a waiver from a Governmental Authority, (b) the failure to make the required contributions
or payments, under any applicable law, on or before the due date for such contributions or payments, (c) the receipt of a notice by a Governmental Authority relating
to the intention to terminate any such Foreign Pension Plan or to appoint a trustee or similar official to administer any such Foreign Pension Plan, or alleging the
insolvency  of  any  such  Foreign  Pension  Plan,  (d)  the  complete  or  partial  termination  of  such  Foreign  Pension  Plan  or  the  complete  or  partial  withdrawal  of  any
participating employer therein, or (e) the occurrence of any transaction that is prohibited under any applicable law;

1.66    "Foreign Pension Plan" means each employee benefit plan (within the meaning of Section 3(3) of ERISA, whether or not subject to ERISA) that is not subject to United
States law and is sponsored, maintained, contributed to or required to be contributed to by Borrowers or, to the extent Borrowers would have liability in connection
therewith, by an Affiliate;

7

1.67    "Foreign Subsidiary" means any Subsidiary of the Borrower Representative that is not a Domestic Subsidiary;

1.68    "GAAP" means United States generally accepted accounting principles in the United States, as in effect from time to time, or those required by government or regulatory
bodies or as may be in general use by significant segments of the accounting profession that are applicable to the circumstances as of the date of determination. All
references  to  "GAAP"  used  herein  shall  be  to  GAAP  applied  consistently  with  the  principals  used  in  the  preparation  of  the  financials  delivered  by  the  Borrower
Representative to the Lender prior to the date of this Loan Agreement and filed with the SEC;

1.69    "Governmental Authority" means any Federal, state, local or foreign court or governmental agency, authority, instrumentality or regulatory body;

1.70    "Group" means the Borrower Representative and its direct and indirect subsidiaries (if any);

1.71    "Group Company" means any member of the Group;

1.72    "Guarantee and Collateral Agreement" means that certain Guarantee and Collateral Agreement, dated as of the Closing Date, by and among the Loan Parties and the

Lender Representative;

1.73    "Hazardous Materials"  means  all  explosive  or  radioactive  substances  or  wastes  and  all  hazardous  or  toxic  substances,  materials  or  wastes,  including  petroleum  or
petroleum  distillates,  asbestos  or  asbestos-containing  materials,  toxic  mold,  polychlorinated  biphenyls,  radon  gas,  infectious  or  medical  wastes  and  all  other  toxic
substances,  materials  or  wastes  of  any  nature  regulated  pursuant  to  any  Environmental  Law  due  to  their  hazardous,  toxic,  dangerous  or  deleterious  properties  or
characteristics;

1.74    "[**]" means [**];

1.75    "Immaterial Subsidiary" means any Subsidiary of the Borrower Representative that (a) does not own or use any Intellectual Property that is material to the business of
the Group (taken as a whole), (b) does not have revenues (after eliminating intercompany obligations) in excess of [**]% of the consolidated revenue (calculated in
accordance  with  GAAP)  of  the  Group  and  (c)  does  not  have  assets  (after  eliminating  intercompany  obligations)  in  excess  of  [**]%  of  the  consolidated  total  assets
(calculated in accordance with GAAP) of the Group;

1.76    "Increased Cost”  means  (i)  a  reduction  in  the  rate  of  return  from  the  Loan  Facility  or  on  the  Lender’s  overall  capital,  (ii)  an  additional  or  increased  cost;  or  (iii)  a
reduction  of  any  amount  due  and  payable  under  any  Loan  Document,  which  is  incurred  or  suffered  by  the  Lender  or  any  of  its  Affiliates  to  the  extent  that  it  is
attributable to the Lender having entered into any Loan or funding or performing its obligations under any Loan Document (in each case other than as a result of (A)
Indemnified Taxes, (B) Taxes described in clauses (b) through (d) of the definition of Excluded Taxes and (C) Connection Income Taxes);

1.77    “Indemnified Taxes” means (a) Taxes, other than Excluded Taxes, imposed on or with respect to any payment made by or on account of any obligation of the Borrowers

under any Loan Document and (b) to the extent not otherwise described in clause (a), Other Taxes;

1.78    “Indemnitee” has the meaning given to such term in Clause 11.1;

1.79        "Initial  Security  and  Guarantee  Documents"  means  the  following  documents:  (A)  the  Guarantee  and  Collateral  Agreement,  (B)  that  certain  Patent  Security
Agreement, dated as of the Closing Date, executed by the Loan Parties and acknowledged and agreed by the Lender Representative and (C) that certain Trademark
Security Agreement, dated as of the Closing Date, executed by the Loan Parties and acknowledged and agreed by the Lender Representative;

1.80    "Intellectual Property" means copyrights and related rights (including, without limitation, rights in computer software), patents, supplementary protection certificates,
utility models, trade marks, trade names, service marks, domain name registrations, registered and unregistered rights in designs, database rights, semi-conductor
topography rights, plant variety rights, rights in undisclosed or confidential information (such as know how, trade secrets and inventions (whether patentable or not)),
other similar intellectual property rights (whether registered or not) and applications for such rights as may exist anywhere in the world;

1.81    "Interest Only Period" means the period commencing on the Closing Date and ending on December 31, 2025 (which date may be extended at any time on or prior to
December  31,  2025,  at  the  discretion  of  the  Borrower  Representative,  to  December  31,  2026  by  written  notice  from  the  Borrower  to  the  Lender  Representative).
Notwithstanding the foregoing, if the Vadadustat FDA Approval is not received on or prior to June 30, 2024, the Interest Only Period will terminate on October 1,
2024;

1.82    "Interim Payment" means, with respect to any Drawdown Date, the payment in respect of the period from such Drawdown Date (where the Drawdown Date is not the
first day of a calendar month) to the First Monthly Repayment Date calculated by dividing the first Monthly payment of interest and principal specified in the relevant
Repayment Schedule by thirty (30) and multiplying that figure by the number of days between (and including) such Drawdown Date and the First Monthly Repayment
Date;

1.83    "Joint Venture" means any joint venture entity, whether a company, unincorporated firm, undertaking, association, joint venture or partnership or any other entity;

8

1.84    “Kreos Affiliate” means any direct Affiliate of Kreos Capital VII (UK) Limited.

1.85    "Lender" means, collectively, Kreos Capital VII (UK) Limited, a company incorporated in England and Wales under registration number 13611522 whose registered office

is at 25-28 Old Burlington Street, London W1S 3AN and the other lenders from time to time party hereto;

1.86    "Liquidity" means, as of any date of determination, the sum of the amount of cash and Cash Equivalents of the Loan Parties and each MSC as of such date; provided that
Liquidity  shall  not  include  (a)  any  cash  or  Cash  Equivalents  that  are  or  should  be  listed  as  “restricted”  on  the  consolidated  balance  sheet  of  the  Borrower
Representative as of such date (as determined in accordance with GAAP) or (b) any cash or Cash Equivalents of a Loan Party that are held in any account that is not
subject to an account control agreement in favor of the Lender Representative; provided, that at all times prior to the DACA Deadline (as defined on Schedule C), cash
in all accounts of the Loan Parties shall be included in “Liquidity” even if an account control agreement is not in place;

1.87    "Loan" means any loan that is made by the Lender to the Borrower pursuant to this Loan Agreement;

1.88        "Loan Documents" means  collectively  this  Loan  Agreement,  the  Warrant  Instrument,  the  Security  Documents,  and  any  other  agreement  designated  as  a  "Loan

Document" by the Lender Representative and the Borrower Representative;

1.89    "Loan Facility" means the loan facility set out in this Loan Agreement;

1.90        "Loan  Facility  Terms"  means  the  certain  terms  applicable  to  the  Loan  Facility  as  set  forth  under  the  heading  Loan  Facility  Terms  at  the  beginning  of  this  Loan

Agreement;

1.91    “Loan Parties” means, collectively, the Borrowers and the Subsidiary Guarantors.

1.92    "Loan Term" means with respect to each Tranche, the period set forth in the Loan Facility Terms (or such other period as may be agreed by the Lender and the Borrower

Representative in writing);

1.93    "Loan to Own Investor" means:

(a) any person or entity whose principal business or material activity is in investment strategies the primary purpose of which is the purchase of distressed loans or
other distressed debt securities with the intention of (or view to) owning a controlling stake of the equity or gaining control of a business (directly or indirectly) (a
"loan to own strategy") (a "Principal Loan to Own Investor");

(b) any person or entity that is an Affiliate or affiliated fund of a Principal Loan to Own Investor (a "Connected Loan to Own Investor"), unless such Affiliate or
affiliated fund is a financial institution which has been established for at least six months and, during that period, regularly engaged in making, purchasing or investing
in loans or debt securities; does not have a loan-to-own strategy as one of its investment strategies; is managed and controlled independently from such person; and is
administered by persons operating behind appropriate information barriers implemented or maintained as required by law, regulation and internal policy and, in any
event, to the extent required to ensure that such administration is independent from such person's interests under the Loan Documents and any information provided
under the Loan Documents is not (and is not capable of being) disclosed or otherwise made available to any person operating behind such information barrier; or

(c) any Principal Loan to Own Investor which has acquired and holds loans or other debt securities in any business owned (directly or indirectly) by any Connected
Loan to Own Investor of such Principal Loan to Own Investor;

1.94    "Margin Stock" has the meaning assigned to such term in Regulation U.

1.95    "Material Adverse Change" means (i) a material adverse effect on the business, operations or financial condition of the Group Companies, taken as a whole; (ii) a
material adverse effect on the ability of the Loan Parties (taken as a whole) to be able to pay any portion of its payment obligations under any of the Loan Documents
in full or to perform its material obligations under the Loan Documents; or (iii) a material adverse effect on the rights or remedies of the Lender (taken as a whole)
under any of the Loan Documents (taken as a whole), unless caused by or related to the action or inaction of the Lender;

1.96    “Material Financial Indebtedness” means Financial Indebtedness of any Group Company with an individual outstanding principal amount in excess of $[**].

1.97    "Material Properties" means each parcel of real property (other than a parcel with a fair market value of less than $[**]) owned in fee by a Loan Party and located in the
United  States,  but  excluding  any  portion  of  such  real  property  that  contains  improvements  located  in  an  area  identified  by  the  Federal  Emergency  Management
Agency (or any successor agency) as a “special flood hazard area”;

1.98    "Minimum Drawdown Amount" means the minimum amount permitted to be drawn down in each Tranche and is the amount set forth in the Loan Facility Terms;

1.99    "Month" and "Monthly" means, in relation to any period for the accrual of commission or fees, a period starting on one day in a calendar month and ending on the

numerically corresponding day in the next calendar month;

9

1.100    "Monthly Repayment Date" means the first day of a calendar month;

1.101    “MSC” means (a) Akebia Therapeutics Securities Corporation, a Massachusetts securities corporation, and (b) any other Subsidiary of the Borrower Representative that

is a securities corporation formed under the laws of the commonwealth of Massachusetts;

1.102    "Multiemployer Plan" means a multiemployer plan as defined in Section 4001(a)(3) of ERISA;

1.103    "Net Cash Proceeds"  means  (A)  with  respect  to  any  Asset  Sale  or  Casualty  Event,  the  cash  proceeds  (including  cash  proceeds  subsequently  received  (as  and  when
received)  in  respect  of  noncash  consideration  initially  received),  net  of  (i)  selling  expenses  (including  broker’s  fees  or  commissions,  legal  fees,  transfer  and  similar
taxes  and  the  Borrower  Representative’s  good  faith  estimate  of  income  taxes  paid  or  payable  in  connection  with  such  sale),  (ii)  amounts  provided  as  a  reserve,  in
accordance with GAAP, against any liabilities under any indemnification obligations or purchase price adjustment associated with such Asset Sale (provided that, to
the  extent  and  at  the  time  any  such  amounts  are  released  from  such  reserve,  such  amounts  shall  constitute  Net  Cash  Proceeds)  and  (iii)  the  principal  amount,
premium or penalty, if any, interest and other amounts on any Financial Indebtedness (other than the obligations) which is secured by the asset sold in such Asset Sale
or subject to such Casualty Event and which is required to be repaid with such proceeds (other than any such financial Indebtedness assumed by the purchaser of such
asset)  and  (B)  with  respect  to  any  incurrence  of  Financial  Indebtedness,  the  cash  proceeds  received  from  such  incurrence,  net  of  taxes  reasonably  estimated  to  be
payable  and  customary  investment  banking  fees,  underwriting  discounts  and  commissions,  premiums,  accrued  interest  and  other  customary  costs  and  expenses
incurred by the Group in connection with such incurrence or issuance;

1.104    “Other Connection Taxes” means , with respect to any Lender, Taxes imposed as a result of a present or former connection between such Lender and the jurisdiction
imposing  such  Tax  (other  than  connections  arising  from  such  Lender  having  executed,  delivered,  become  a  party  to,  performed  its  obligations  under,  received
payments under, received or perfected a security interest under, engaged in any other transaction pursuant to or enforced any Loan Document, or sold or assigned an
interest in any Loan or Loan Document);

1.105    “Other Taxes” means all present or future stamp, court or documentary, intangible, recording, filing or similar Taxes that arise from any payment made under, from the
execution,  delivery,  performance,  enforcement  or  registration  of,  from  the  receipt  or  perfection  of  a  security  interest  under,  or  otherwise  with  respect  to,  any  Loan
Document, except any such Taxes that are Other Connection Taxes imposed with respect to an assignment;

1.106    "Party” means a party to this Loan Agreement;

1.107    "Perfection Exceptions” has the meaning given to such term in the Guarantee and Collateral Agreement;

1.108    "Permitted Acquisition” means any purchase or other acquisition of assets, property, business units or divisions, or equity interests of any person, so long as:

(i)    no Default or Event of Default shall have occurred and be continuing at the time of, or would immediately result from, the consummation of such acquisition;

(ii)        such  assets,  property,  business  units  or  divisions,  or  person  whose  equity  interests  are  being  acquired,  are  in  the  biopharma  business  or  reasonably  related,
ancillary or complementary businesses thereto (including reasonably related, complementary, synergistic or ancillary technologies) in which the Group is then
engaged;

(iii)    the Loan Parties shall, to the extent applicable, comply with the requirements of (x) Clause 8.1.25 of this Loan Agreement with respect to such acquired equity
interests and (y) the Guarantee and Collateral Agreement and Clause 8.1.26 of this Loan Agreement with respect to such acquired assets and property, in each
case within the timeframes set forth therein; and

(iv)    any Financial Indebtedness or Security Interests assumed in connection with such acquisition are otherwise permitted hereunder;

(v)    such acquisition was not preceded by an unsolicited tender offer for such equity interests by, or proxy contest initiated by, the Borrower Representative or any of

its Affiliates;

(vi)        the  Borrowers  would  be  in  compliance  with  either  of  the  financial  covenants  set  forth  in  Clause 8.3  as  of  the  most  recently  completed  test  period  for  such
financial covenant ending prior to such transaction for which financial statements have been delivered pursuant to Clause 8.1.9 after giving pro forma effect to
such transaction as if such transaction had occurred as of the first day of such test period; and

(vii)    the Borrower Representative shall deliver Pro Forma Projections demonstrating that Cash Flow shall not be reduced by more than [**]% in the aggregate for the
last three months of the period covered by such Pro Forma Projections (taken as a whole) as compared to the last three months of the standalone (i.e. not pro
forma) board-approved projections for such period (taken as a whole);

provided, that (A) in the case of any acquisition of assets that will not be owned by a Loan Party, or any equity interests of a person who shall not become a
Loan Party, the consideration for all such acquisitions shall not exceed $[**] in any fiscal year (or, at the election of the Borrower Representative, $[**] for any
one such acquisition; provided that, if the Borrower makes such election, no Permitted Acquisition of a non-Loan Party or assets to be held by a non-Loan
Party shall have occurred prior to such acquisition and no Permitted Acquisition of a non-Loan

10

Party or assets to be held by a non-Loan Party shall be permitted following such acquisition) and (B) for any Permitted Acquisition, the aggregate consideration
for such Permitted Acquisition, when taken together with the aggregate consideration of all Permitted Acquisitions consummated after the Closing Date and
prior  to  such  time,  shall  not  exceed  $[**],  unless  in  the  case  of  this  clause  (B)  the  Acquisition  Consideration  Condition  is  satisfied  at  the  time  of  the
consummation of such acquisition.

1.109    "Permitted Bond Hedge Transaction"  means  any  call  or  capped  call  option  (or  substantively  equivalent  derivative  transaction)  pursuant  to  which  the  Borrower
Representative  acquires  an  option  requiring  the  counterparty  thereto  to  deliver  to  the  Borrower  Representative  (i)  shares  of  common  stock  of  the  Borrower
Representative (or other securities or property following a merger event, reclassification or other change of the common stock of the Borrower representative), (ii) the
cash  value  thereof  or  (iii)  a  combination  thereof,  in  each  case,  from  time  to  time  upon  exercise  of  such  option  entered  into  by  the  Borrower  Representative  in
connection with the conversion of any Permitted Convertible Debt; provided that the purchase price for such Permitted Bond Hedge Transaction, less the proceeds
received  by  the  Borrower  Representative  from  the  sale  of  any  related  Permitted  Warrant  Transaction,  does  not  exceed  the  net  proceeds  received  by  the  Borrower
Representative from the sale of such Permitted Convertible Debt issued in connection with such Permitted Bond Hedge Transaction;

1.110    "Permitted Convertible Debt" means Financial Indebtedness that is either (i) convertible into a fixed number (subject to customary anti-dilution adjustments, “make-
whole”  increases  and  other  customary  changes  thereto)  of  shares  of  common  stock  of  the  Borrower  Representative  (and  cash  in  lieu  of  fractional  shares)  (or  other
securities or property following a merger event, reclassification or other change of the common stock of the Borrower Representative) or (ii) sold as units with call
options,  warrants  or  rights  to  purchase  (or  substantially  equivalent  derivative  transactions)  that  are  exercisable  for  shares  of  common  stock  of  the  Borrower
Representative (and cash in lieu of fractional shares) (or other securities or property following a merger event or other change of the common stock of the Borrower
Representative); provided that such Financial Indebtedness shall (a) not require any scheduled amortization or otherwise require payment of principal in cash or, if
the Cash Interest Condition is not satisfied as of the date of the issuance of such Financial Indebtedness, cash-pay interest prior to, or have a scheduled maturity date,
in each case earlier than [**] after the Maturity Date (it being understood that neither (x) any offer to purchase such Financial Indebtedness as a result of “change of
control” or “fundamental change” under and as defined in any indenture governing any Permitted Convertible Debt, in each case at a price no greater than [**]% of the
principal amount of such Notes repurchased plus accrued but unpaid interest to, but not including, the date of such repurchase (which for the avoidance of doubt shall
not be calculated at a premium) nor (y) any early conversion of such Financial Indebtedness into shares of the Borrower’s common stock in accordance with the terms
thereof, in each case, shall violate the restriction of this clause (a)), (b) be unsecured or, if secured, be (i) secured by no collateral other than Collateral securing this
Loan Facility and (ii) subordinated to the obligations of the Loan Parties under the Loan Documents pursuant to terms satisfactory to the Lender Representative in its
sole discretion; (c) not be guaranteed by any Subsidiary of the Borrowers, and (d) shall be Financial Indebtedness of the Borrowers and not any Subsidiary thereof;
provided, further, that if any Borrower or any of its Affiliates seeks to issue any Financial Indebtedness that it intends to constitute Permitted Convertible Debt (the
“Proposed Convertible Debt”), the Borrower Representative shall promptly provide written notice to the Lender specifying the material proposed terms of such
Proposed Convertible Debt.

Notwithstanding anything to the contrary in this Loan Agreement or any other Loan Document, all terms of an accounting or financial nature used herein shall be
construed, and all computations of amounts and ratios referred to herein shall be made without giving effect to any treatment of Financial Indebtedness in respect of
convertible  debt  instruments  under  Accounting  Standards  Codification  470-20  (or  any  other  Accounting  Standards  Codification  or  Financial  Accounting  Standard
having a similar result or effect) to value any such Financial Indebtedness in a reduced or bifurcated manner as described therein, and such Financial Indebtedness
shall at all times be valued at the full stated principal amount thereof. For the avoidance of doubt, and without limitation of the foregoing, Permitted Convertible Debt
shall  at  all  times  be  valued  at  the  full  stated  principal  amount  thereof  and  shall  not  include  any  reduction  or  appreciation  in  value  of  the  shares  deliverable  upon
conversion thereof;

1.111    "Permitted Convertible Debt Call Transaction" means any Permitted Bond Hedge Transaction and any Permitted Warrant Transaction;

1.112    "Permitted Distributions" means:

(i)    dividends, distributions or other payments by any wholly-owned Subsidiary on its equity interests to, or the redemption, retirement or purchase by any wholly-

owned subsidiary of its equity interests from, Borrower or any other wholly-owned Subsidiary;

(ii)    dividends, distributions or other payments by any non-wholly-owned Subsidiary on its equity interests to, or the redemption, retirement or purchase by any non-

wholly-owned Subsidiary of its equity interests from, each owner

11

of such non-wholly-owned Subsidiary’s equity interests based on their relative ownership interests of the relevant class of such equity interests;

(iii)    any such payments made in order to consummate a Permitted Acquisition or other Permitted Investment by Borrower or any of its Subsidiaries;

(iv)        the  payment  of  dividends  by  Borrower  solely  in  non-cash  pay  and  non-redeemable  capital  stock  (including,  for  the  avoidance  of  doubt,  dividends  and

distributions payable solely in equity interests);

(v)        cash  payments  in  lieu  of  the  issuance  of  fractional  shares  arising  (A)  out  of  stock  dividends,  splits  or  combinations  or  (B)  in  connection  with  the  exercise  of

warrants, options or other securities convertible into or exchangeable for equity interests;

(vi)        (i)  the  receipt  or  acceptance  of  the  return  to  Borrower  or  any  of  its  Subsidiaries  of  equity  interests  of  Borrower  constituting  a  portion  of  the  purchase  price
consideration in settlement of indemnification claims, or as a result of a purchase price adjustment (including earn-outs or similar obligations) resulting from
Permitted Acquisitions or Permitted Investments and (ii) payments or distributions to equity holders pursuant to appraisal rights required under requirements
of law;

(vii)    the distribution of rights pursuant to any shareholder rights plan or the redemption of such rights for nominal consideration in accordance with the terms of any

shareholder rights plan in effect on the Closing Date;

(viii)    purchases of equity interests of Borrower or its Subsidiaries in connection with the exercise of stock options or warrants or similar rights by way of cashless

exercise, or in connection with the satisfaction of withholding tax obligations;

(ix)    issuance to directors, officers, employees or contractors of Borrower of common stock of Borrower upon the exercise of options or the vesting of restricted stock,
restricted  stock  units,  or  other  rights  to  acquire  common  stock  of  Borrower  pursuant  to  plans  or  agreements  approved  by  Borrower’s  Board  of  Directors  or
stockholders;

(x)    the repurchase, retirement or other acquisition or retirement for value of equity interests of Borrower or any of its Subsidiaries held by any future, present or
former employee, consultant, officer or director (or spouse, ex-spouse or estate of any of the foregoing or trust for the benefit of any of the foregoing or any
lineal descendants thereof) of Borrower or any of its Subsidiaries pursuant to any management equity plan or stock option plan or any other management or
employee benefit plan or agreement, or any stock subscription or shareholder agreement or employment agreement, or as otherwise approved by the board of
directors of the relevant Group Company; provided, however, that the aggregate payments made under this clause (x) do not exceed in any calendar year the
sum of (i) $[**] plus (ii) [**]; and

(xi)    the payment of customary fees and reasonable out of pocket expenses to directors of the Group Companies and indemnities provided on behalf of directors and
officers of the Group Companies, in each case, in the ordinary course of business and to the extent attributable to the operation of the Group Companies;

1.113    "Permitted Financial Indebtedness" has the meaning given to that term in Clause 8.2.2;

1.114    "Permitted Licenses" means:

(i)        any  license,  sublicense  and  any  other  agreement  that  grants  any  covenant  not  to  sue,  option  or  other  preferential  right  for  a  license,  or  other  similar  right  or
immunity, under any Intellectual Property, entered into by a Group Company with a person that is not an Affiliate of any Group Company and that involves the
granting  by  such  person  to  such  Group  Company  of  any  rights  to  such  Intellectual  Property  for  use  in  connection  with  the  Group’s  business,  including  for
research, development, manufacture, commercialization (including commercial sales to end users), marketing, promotion, co-promotion, sales, import, export
or distribution of any product or services;

(ii)    any license, sublicense and any other agreement that grants any covenant not to sue, option or other preferential right for a license, or other similar right or
immunity, under any Intellectual Property, entered into by a Loan Party with any other Loan Party that involves the granting by such Loan Party to such other
Loan  Party  of  any  rights  to  such  Intellectual  Property  for  use  in  connection  with  such  other  Loan  Party’s  business,  including  for  research,  development,
manufacture, commercialization (including commercial sales to end users), marketing, promotion, co-promotion, sales, import, export or distribution of any
product or services;

(iii)    any license, sublicense and any other agreement that grants any covenant not to sue, option or other preferential right for a license, or other similar right or
immunity, under any Intellectual Property, entered into by a Loan Party with a Person that is not an Affiliate of any Loan Party and that involves the granting
by such Loan Party to such Person of any rights to such Intellectual Property on a non-exclusive basis for any purpose;

(iv)    any license, sublicense and any other agreement that grants any covenant not to sue, option or other preferential right for a license, or other similar right or
immunity, under any Intellectual Property other than Intellectual Property relating to vadadustat or Auryxia®, entered into by a Loan Party with a Person that
is not an Affiliate of any Loan Party and that involves the granting by such Loan Party to such Person of any rights to such Intellectual Property on an exclusive
basis for use in connection with such Person’s business, including research, development, manufacture, commercialization (including commercial sales to end
users), marketing, promotion, co-promotion, sales import, export or distribution, of products and services; provided, that any such exclusive license that is

12

exclusive to territory within the United States shall be subject to the consultation (but not the consent) of the Lender Representative;

(v)    any license, sublicense and any other agreement that grants any covenant not to sue, option or other preferential right for a license, or other similar right or
immunity, under any Intellectual Property relating to vadadustat or Auryxia®, entered into by a Loan Party with a Person that is not an Affiliate of any Loan
Party and that involves the granting by such Loan Party to such Person of any rights to such Intellectual Property on an exclusive basis in territories where the
Loan Parties currently do not have a then existing commercial partner for commercial exploitation of vadadustat or Auryxia®, for use in connection with such
Person’s  business,  including  research,  development,  manufacture,  commercialization  (including  commercial  sales  to  end  users),  marketing,  promotion,  co-
promotion, sales import, export or distribution, of vadadustat or Auryxia®, as applicable, in such territories; and

(vi)    any licenses existing on the Closing Date as set forth on Schedule G hereto.

1.115    "Permitted Investments" has the meaning given to that term in Clause 8.2.6;

1.116    "Permitted Security Interests" has the meaning given to such term in Clause 8.2.3;

1.117    "Permitted Transfers" has the meaning given to that term in Clause 8.2.1;

1.118    “Permitted Warrant Transaction” means any call option, warrant or right to purchase (or substantively equivalent derivative transaction) relating to the Borrower
Representative’s  common  stock  (or  other  securities  or  property  following  a  merger  event,  reclassification  or  other  change  of  the  common  stock  of  the  Borrower
Representative) sold by the Borrower Representative substantially concurrently with any purchase by the Borrower Representative of a related Permitted Bond Hedge
Transaction.

1.119    "Plan" means an employee pension benefit plan (other than a Multiemployer Plan) which is subject to Title IV of ERISA or subject to the minimum funding standards
under Section 302 of ERISA or Section 412 of the Code and that is sponsored, maintained, contributed to or required to be contributed to by Borrowers or any ERISA
Affiliate.

1.120    “Pro Forma Projections” means, with respect to any acquisition, pro forma projections for the twelve fiscal month period immediately following such transaction.

1.121    “Register” has the meaning given in Clause 15.5.

1.122    "Regulation T" means Regulation T of the Board as from time to time in effect and all official rulings and interpretations thereunder or thereof;

1.123    "Regulation U" means Regulation U of the Board as from time to time in effect and all official rulings and interpretations thereunder or thereof;

1.124    "Regulation X" means Regulation X of the Board as from time to time in effect and all official rulings and interpretations thereunder or thereof;

1.125    “Related Fund” in  relation  to  a  fund  or  account  (the  "first  fund"),  means:  (i)  a  fund  or  account  which  is  managed  or  advised  by  the  same  investment  manager  or
investment adviser as the first fund; or (ii) if it is managed by a different investment manager or investment adviser, a fund or account whose investment manager or
investment adviser is an Affiliate of the investment manager or investment adviser of the first fund; or (iii) that investment manager or investment adviser itself.

1.126    "Relevant Governmental Body" means the Term SOFR Administrator, the Federal Reserve Board or the Federal Reserve Bank of New York, or a committee officially

endorsed or convene by the Federal Reserve Board or the Federal Reserve Bank of New York or any successor thereto;

1.127    "Repayment Schedule" has the meaning given in Clause 5.1.1;

1.128    "Representative" means any delegate, agent, manager, administrator, nominee, attorney, trustee or custodian;

1.129    “Resolution Authority” shall mean an EEA Resolution Authority or, with respect to any UK Financial Institution, a UK Resolution Authority.

1.130    "Sanctioned Person" means, at any time, any person, organisation or vessel that is: (i) listed on a Sanctions List; (ii) a government of a Designated Jurisdiction; (iii) an
agency or instrumentality of, a government of a Designated Jurisdiction; (iv) located, organised, operating from, incorporated or resident in a Designated Jurisdiction;
(v) any person 50% or greater owned or controlled by any such person or persons described in (i) - (iv) above; (vi) otherwise a target of Sanctions; or (vii) acting on
behalf of any of the persons listed in paragraphs (i) - (vi) above, for the purposes of evading or avoiding, or having the intended effect of or intending to evade or avoid,
or facilitating the evasion or avoidance of, any Sanctions;

13

1.131    "Sanctions"  means  all  economic  or  financial  sanctions,  regulations,  sectoral  sanctions,  secondary  sanctions,  trade  embargoes  or  other  restrictive  measures  enacted,

implemented, imposed, administered or enforced from time to time by any Sanctions Authority;

1.132    "Sanctions Authority" means any agency or person which is duly appointed, empowered or authorised to enact, administer, implement and/or enforce Sanctions,
including  (without  limitation):  (i)  the  United  Nations  Security  Council;  (ii)  the  European  Union  or  any  of  its  member  states;  (iii)  the  United  States  government,
including the United States Department of the Treasury (including the Office of Foreign Assets Control (“OFAC”)), the United States Department of State and the
United States Department of Commerce; and (iv) the United Kingdom government, including HM Treasury, the Foreign, Commonwealth and Development Office and
the  Department  for  Business,  Energy  &  Industrial  Strategy,  including,  in  each  case,  any  successor,  replacement  or  other  governmental  institution  or  agency  of  the
foregoing;

1.133    "Sanctions List" means the “Specially Designated Nationals and Blocked Persons” list administered by OFAC, the EU Consolidated List of Financial Sanctions Targets,
the  Consolidated  List  of  Financial  Sanctions  Targets  issued  by  HM  Treasury,  or  any  similar  list  administered  or  maintained  and  made  public  by  any  Sanctions
Authority each as amended, supplemented and/or substituted from time to time;

1.134        "Security Documents" means  the  Initial  Security  and  Guarantee  Documents,  and  any  other  applicable  document,  in  the  agreed  form,  evidencing  the  guarantees
provided by and security over assets of any Loan Party, or any document entered into by any Loan Party creating a Security Interest or guarantee in favor of the Lender
Representative or otherwise designated in writing as a Security Document;

1.135    "Security Interest" means any mortgage, charge (whether fixed or floating, legal or equitable), pledge, lien, hypothecation, assignment by way of security or otherwise,
trust arrangement, title retention or encumbrance or enforceable right of a third party, any other type of security interest or preferential arrangement having a similar
effect  to  any  of  the  foregoing  or  in  the  nature  of  security  of  any  kind  whatsoever  and  in  any  jurisdiction;  provided,  that  in  no  event  shall  an  operating  lease  (as
determined prior to the adoption of ASC 842) or an agreement to sell be deemed to constitute a Security Interest.

1.136        "Security  Period"  means  the  period  commencing  on  the  date  of  this  Loan  Agreement  and  ending  on  the  date  all  payment  obligations  (other  than  contingent
indemnification  and  expense  reimbursement  obligations  for  which  no  claim  has  been  made)  have  been  paid  in  full  and  all  loan  commitments  under  this  Loan
Agreement have expired or been terminated;

1.137    "SOFR" means, with respect to any day, the secured overnight financing rate as administered by the SOFR Administrator;

1.138    "SOFR Administrator" shall mean the Federal Reserve Bank of New York (or a successor administrator of the secured overnight financing rate);

1.139        "subsidiary"  means,  with  respect  to  any  Person  (herein  referred  to  as  the  “parent”),  any  corporation,  partnership,  limited  liability  company,  association  or  other
business entity (a) of which securities or other ownership interests representing more than 50% of the equity or more than 50% of the ordinary voting power or more
than 50% of the general partnership interests are, at the time any determination is being made, owned, Controlled or held, or (b) that is, at the time any determination
is made, otherwise Controlled, by the parent or one or more subsidiaries of the parent or by the parent and one or more subsidiaries of the parent;

1.140    "Subsidiary" means any subsidiary of the Borrower Representative;

1.141    "Subsidiary Guarantor" means any subsidiary of the Borrower Representative that is or becomes a party to the Guarantee and Collateral Agreement. As of the Closing

Date, the only Subsidiary Guarantor is Keryx Biopharmaceuticals, Inc., a Delaware corporation;

1.142        "Taxes" means  all  present  and  future  income,  value  added  and  other  taxes,  levies,  imposts,  duties,  deductions,  charges  and  withholdings  in  the  nature  of  taxes
whatsoever  (including  backup  withholding),  together  with  interest  thereon  and  assessments,  fees,  charges  or  penalties  with  respect  thereto  made  on  or  in  respect
thereof and "Tax" shall be construed accordingly;

1.143    "Term SOFR” means the Term SOFR Reference Rate for a tenor of one month on the day (such day, the "Periodic Term SOFR Determination Day") that is [**]
prior  to  the  first  day  of  such  calculation,  as  such  rate  is  published  by  the  Term  SOFR  Administrator;  provided  that that  if  as  of  [**].,  New  York  City  time,  on  any
Periodic Term SOFR Determination Day the Term SOFR Reference Rate has not been published by the Term SOFR Administrator and a Benchmark Replacement
Date  with  respect  to  the  Term  SOFR  Reference  Rate  has  not  occurred,  then  Term  SOFR  will  be  the  Term  SOFR  Reference  Rate  as  published  by  the  Term  SOFR
Administrator on the first preceding Business Day for which such Term SOFR Reference Rate was published by the Term SOFR Administrator so long as such first
preceding Business Day is not more than [**] prior to such Periodic Term SOFR Determination Day;

1.144    "Term SOFR Administrator" shall mean CME Group Benchmark Administration Limited (or a successor administrator of the Term SOFR Reference Rate selected by

the Lender Representative in its reasonable discretion);

1.145    "Term SOFR Reference Rate" means the forward-looking term rate based on SOFR;

1.146    "Total Loan Facility" means the amount set forth in the Loan Facility Terms;

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1.147    "Tranche" means an amount drawn down out of the Total Loan Facility pursuant to this Loan Agreement (it being understood that there shall be three tranches, as set

forth in the Loan Facility Terms);

1.148    "Transaction Fee" means the amount set forth in the Loan Facility Terms;

1.149    "Unpaid Sum" means any sum due and payable but unpaid by any Loan Party under any Loan Document;

1.150    "Unadjusted Benchmark Replacement" shall mean the Benchmark Replacement, excluding the related Benchmark Replacement Adjustment;

1.151    "United States" and "U.S." mean the United States of America;

1.152    “U.S. Person” means any Person that is a “United States person” as defined in Section 7701(a)(30) of the Code;

1.153    "UK Financial Institution" shall mean any BRRD Undertaking (as such term is defined under the PRA Rulebook (as amended form time to time) promulgated by the
United Kingdom Prudential Regulation Authority) or any person subject to IFPRU 11.6 of the FCA Handbook (as amended from time to time) promulgated by the
United  Kingdom  Financial  Conduct  Authority,  which  includes  certain  credit  institutions  and  investment  firms,  and  certain  affiliates  of  such  credit  institutions  or
investment firms;

1.154    "UK Resolution Authority" shall mean the Bank of England or any other public administrative authority having responsibility for the resolution of any UK Financial

Institution;

1.155    "USA PATRIOT Act" shall mean The Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001

(Title III of Pub. L. No. 107-56 (signed into law October 26, 2001));

1.156    "Vadadustat FDA Approval" means the receipt by the Borrower Representative of notice from the United States Food and Drug Administration granting the Borrower

Representative or a Subsidiary Guarantor marketing approval for vadadustat;

1.157    “Vadadustat Withdrawal Event” means the withdrawal by the United States Food and Drug Administration of the marketing approval for vadadustat pursuant to a

final, non-appealable determination;

1.158    "VAT" means (i) any value added tax imposed by the United Kingdom Value Added Tax Act 1994; (ii) any tax imposed in compliance with the Council Directive of 28
November  2006  on  the  common  system  of  value  added  tax  (EC  Directive  2006/112);  and  (iii)  any  other  tax  of  a  similar  nature,  whether  imposed  in  the  United
Kingdom  or  in  a  member  state  of  the  European  Union  in  substitution  for,  or  levied  in  addition  to,  such  tax  referred  to  in  paragraph  (i)  or  (ii)  above,  or  imposed
elsewhere.

1.159    "[**]" means [**];

1.160    "Warrant Instrument" means a warrant instrument, in the agreed form, pursuant to which warrants over shares in the Borrower Representative are to be issued by

the Borrower Representative to Kreos Capital VII Aggregator SCSp on the date of this Loan Agreement;

1.161    Write-Down and Conversion Powers” means, (a) with respect to any EEA Resolution Authority, the write-down and conversion powers of such EEA Resolution
Authority from time to time under the Bail-In Legislation for the applicable EEA Member Country, which write-down and conversion powers are described in the EU
Bail-In Legislation Schedule and (b) with respect to the United Kingdom, any powers of the applicable Resolution Authority under the Bail-In Legislation to cancel,
reduce, modify or change the form of a liability of any UK Financial Institution or any contract or instrument under which that liability arises, to convert all or part of
that liability into shares, securities or obligations of that person or any other person, to provide that any such contract or instrument is to have effect as if a right had
been exercised under it or to suspend any obligation in respect of that liability or any of the powers under that Bail-In Legislation that are related to or ancillary to any
of those powers.

2.    INTERPRETATION

2.1    In this Loan Agreement (unless the context requires otherwise) any reference to:

2.1.1    any law or legislative provision includes a reference to any subordinate legislation made under that law or legislative provision before the date of this Loan Agreement, to
any  modification,  re-enactment  or  extension  of  that  law  or  legislative  provision  made  before  that  date  and  to  any  former  law  or  legislative  provision  which  it
consolidated or re-enacted before that date;

2.1.2    any gender includes a reference to other genders and the singular includes a reference to the plural and vice versa;

2.1.3    a Clause or Schedule is to a clause or schedule (as the case may be) of or to this Loan Agreement;

2.1.4        a  "person"  or  "Person"  shall  be  construed  as  including  a  reference  to  an  individual,  firm,  company,  corporation,  partnership,  unincorporated  body  of  persons  or  any

country (or state thereof or any agency thereof);

15

2.1.5    an "amendment" includes a supplement, novation or re-enactment in writing and "amended" is to be construed accordingly;

2.1.6    "assets" includes present and future properties;

2.1.7    an "authorization" includes an authorization, consent, approval, resolution, licence, exemption, filing, registration and notarisation;

2.1.8    a "regulation" includes any regulation, rule, official directive, request or guideline (whether or not having the force of law) of any governmental, inter-governmental or

supranational body, agency, department or regulatory, self-regulatory or other authority or organisation;

2.1.9    [reserved];

2.1.10    "holding company" means, in relation to a person, any other person in respect of which it is a subsidiary;

2.1.11    [reserved];

2.1.12    this Loan Agreement (or to any specified provision of this Loan Agreement), any other document or a provision of any other document, shall be construed as a reference
to this Loan Agreement, that document or a provision of that document as in force for the time being and as amended in accordance with the terms thereof, or, as the
case may be, with the agreement of the relevant parties and (where such consent is, by the terms of this Loan Agreement or the relevant document, required to be
obtained as a condition to such amendment being permitted) the prior written consent of the Lender;

2.1.13    "other" and "otherwise" are not to be construed ejusdem generis with any foregoing words where a wider construction is possible and "include" and "including", "in
particular", "for example" or any similar expression are to be construed as being by way of illustration or emphasis only and are not to be construed as, nor shall they
take effect as, limiting the generality of any foregoing words;

2.1.14    a document being in "agreed form" is a document which is in a form reasonably acceptable to the Borrower Representative and the Lender Representative; and

2.1.15    $ is the official currency of the United States.

2.2    If a payment date in relation to any payment from the Borrowers or any other Loan Party under this Loan Agreement or the Security Documents falls on a day which is not
a Business Day, the relevant payment date shall be the next Business Day in that calendar month (if there is one) or the preceding Business Day (if there is not). If the
performance of any other obligation by a Group Company under the Loan Documents is stated to be due on a day which is not a Business Day, the relevant date of
performance shall be the immediately succeeding Business Day.

2.3    A Default (other than an Event of Default) is continuing if it has not been remedied or waived and any reference to an Event of Default being continuing is a reference to an

Event of Default that has not been waived by the Lender.

2.4    The headings in this Loan Agreement are inserted for convenience only and do not form part of this Loan Agreement and do not affect its interpretation.

2.5    If there is any conflict between the provisions of this Loan Agreement and the provisions of any other Loan Document, the provisions of this Loan Agreement shall prevail.

3.    LOAN FACILITY

3.1    Lender's Commitment

3.1.1    Subject to Clause 3.5 below, the Lender shall and agrees hereby to make available to the Borrowers the Total Loan Facility under the terms of this Loan Agreement, to be

drawn down as set forth in the Loan Facility Terms and in accordance with Clause 3.2.

3.1.2    The Lender shall not be under any commitment to advance any part of the Loan after the Expiry Date of the applicable part of such Loan or upon the earlier termination

of the Loan Facility, or on dates other than those specified in this Loan Agreement.

3.1.3    The unutilised portion (if any) of the Loan Facility shall be cancelled after the expiry of the final period for Drawdown as set forth in the Loan Facility Terms, whereupon

the Total Loan Facility shall be reduced accordingly.

3.1.4    In granting the Loan Facility, the Lender is relying on the representations and warranties contained in Clause 7.

3.1.5    Each Drawdown made under the Loan Facility shall be secured by the Security Documents.

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3.2    Date of Advance(s) of the Loan

3.2.1    Subject to Clauses 3.1.2 and 3.2.2, (and subject to the satisfaction of the relevant conditions set forth in Clause 3.5), each Tranche shall be advanced and made available to
the Borrowers on the relevant Drawdown Date to the extent the Borrower has delivered an executed Drawdown Notice to the Lender Representative at least [**] (or in
the case of Tranche A, at least [**]) prior to the requested Drawdown Date (or such shorter period as the Lender Representative may reasonably agree in writing). Each
Drawdown Notice in respect of Tranche B or Tranche C must be received by the Lender Representative at least [**] prior to the end of the relevant Expiry Date. No
more  than  one  Drawdown  Notice  may  be  served  in  respect  of  each  Tranche.  Once  a  Drawdown  Notice  has  been  delivered  to  the  Lender  Representative,  it  is
irrevocable. Each Tranche requested to be advanced pursuant to a Drawdown Notice shall be in an amount equal to or greater than the Minimum Drawdown Amount.

3.2.2    If the requested Drawdown Date falls on a day which is not a Business Day, the Lender shall only be obligated to pay the relevant Tranche to the applicable Borrower on
the next Business Day in that calendar month. Where there is no next Business Day in that calendar month, the Lender shall only be obligated to pay the relevant
Tranche to the applicable Borrower on the first Business Day of the next calendar month.

3.3    Method of Disbursement

3.3.1    The payment by the Lender to the Drawdown Account, or to such other bank account as is agreed in writing between the Lender and the Borrower Representative, shall
constitute the making of the Loan (or the relevant part thereof) and each Borrower shall thereupon become indebted, as principal and direct obligor, to the Lender in
an amount equal to the Loan (or the relevant part thereof) and all interest thereon and other payments due in connection therewith under this Loan Agreement.

3.3.2        Any  delay  or  failure  by  the  Lender  to  fund  any  loan  as  a  result  of  a  disruption  not  under  the  Lender’s  control,  including,  without  limitation,  due  to  a  cyber-attack,

computer hacking or similar event shall not constitute a breach by the Lender of its obligations under this Loan Agreement.

3.4    [Reserved]

3.5    Conditions Precedent requirements relative to the Advance of the Loans

3.5.1    Tranche A: The obligation of the Lender to make the initial Loan under Tranche A on the Closing Date is subject solely to the satisfaction or waiver of each of the following

conditions (except for any such items for which a post-closing period for completion has been granted pursuant to Schedule C):

(i)    (A) the provision of copies of the articles of incorporation or formation, including all amendments thereto, of each Loan Party, certified as of a recent date by the
Secretary of State of the state of its organization, and a certificate as to the good standing of each Loan Party as of a recent date from such Secretary of State
and (B) a certificate of the Secretary, Financial Officer or Assistant Secretary of each Loan Party, dated the date of this Loan Agreement and certifying (I) that
attached thereto is a true and complete copy of the by-laws or limited liability company agreement, as applicable, of such Loan Party as in effect on such date
and  at  all  times  since  a  date  prior  to  the  date  of  the  resolutions  described  in  clause  (II)  below,  (II)  that  attached  thereto  is  a  true  and  complete  copy  of
resolutions duly adopted by the board of directors or other applicable governing body of such Loan Party authorizing the execution, delivery and performance
of the Loan Documents to which such Person is a party and, in the case of the Borrowers, the borrowings hereunder, and that such resolutions have not been
modified, rescinded or amended and are in full force and effect, (III) that the certificate or articles of incorporation or formation of such Loan Party have not
been amended since the date of the last amendment thereto shown on the certificate of good standing furnished pursuant to clause (A) above, and (IV) as to the
incumbency and specimen signature of each officer executing any Loan Document or any other document delivered in connection herewith on behalf of such
Loan  Party  (which  certificate  shall  be  countersigned  by  another  officer  to  certify  as  to  the  incumbency  and  specimen  signature  of  the  Secretary,  Financial
Officer or Assistant Secretary executing such certificate);

(ii)        the  relevant  Parties  having  executed  and  delivered  to  the  Lender  Representative  copies  of  the  Initial  Security  and  Guarantee  Documents  and  this  Loan
Agreement,  and  each  other  document  required  to  be  delivered  on  the  Closing  Date  under  the  Initial  Security  and  Guarantee  Documents  (including  share
certificates  and  stock  transfer  forms  where  relevant).  The  Lender  Representative  shall  have  a  security  interest  in  the  Collateral  of  the  type  and  priority
described in each of the Security Documents;

(iii)    the Borrowers’ compliance with Clauses 10.1 and (to the extent an invoice with respect thereto has been provided to the Borrower Representative at least [**]

prior to the Closing Date), 10.3.1(i);

(iv)    evidence of the Borrowers’ compliance with Clause 8.1.15(ii);

(v)    [reserved];

(vi)    a customary legal opinion from Latham & Watkins LLP, dated as of the date of this Loan Agreement;

(vii)    to the extent requested by the Lender in writing at least [**] prior to the Closing Date, all documents, confirmations and evidence required by the Lender to

satisfy its "know your customer" requirements or similar

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identification checks (including the USA PATRIOT ACT) in order to meet its obligations under applicable money laundering, or similar, laws and regulations;

(viii)    receipt by the Lender of customary lien searches in the jurisdiction of organization of each Loan Party;

(ix)        a  certificate,  dated  as  of  the  date  of  this  Loan  Agreement  and  signed  by  a  Financial  Officer  of  the  Borrower  Representative,  confirming  compliance  with  the

conditions precedent set forth in the following clauses (x) and (xi);

(x)    the representations and warranties set forth in Clause 7 and in each other Loan Document shall be true and correct in all material respects as of the Closing Date
with the same effect as though made as of such date (except to the extent that such representations and warranties specifically refer to an earlier date, in which
case they shall be true and correct in all material respects as of such earlier date);

(xi)        at  the  time  of,  and  immediately  after  giving  effect  to  the  borrowing  as  of  such  Drawdown  Date,  no  Default  or  Event  of  Default  shall  have  occurred  and  be

continuing;

(xii)    delivery to the Lender Representative of a customary solvency certificate (with “solvency” to be defined in an manner consistent with Clause 7.1.42);

(xiii)    delivery to Kreos Capital VII Aggregator SCSp of a duly executed copy of the Warrant Instrument;

(xiv)        delivery  to  Kreos  Capital  VII  Aggregator  SCSp  of  a  duly  executed  copy  of  the  relevant  warrant  certificate  to  be  issued  in  accordance  with  the  terms  of  the

Warrant Instrument; and

(xv)    delivery to the Lender Representative of an executed intercompany subordination agreement (the “Intercompany Subordination Agreement”).

3.5.2    Tranche B: The obligation of the Lender to make the Loan under Tranche B is subject solely to the satisfaction or waiver of each of the following conditions:

(i)    receipt by the Lender Representative of an executed Drawdown Notice in accordance with Clause 3.2;

(ii)    the representations and warranties set forth in Clause 7 and in each other Loan Document shall be true and correct in all material respects as of the applicable
Drawdown  Date  with  the  same  effect  as  though  made  as  of  such  date  (except  to  the  extent  that  such  representations  and  warranties  specifically  refer  to  an
earlier date, in which case they shall be true and correct in all material respects as of such earlier date);

(iii)    at the time of, and immediately after giving effect to the borrowing as of the applicable Drawdown Date, no Default or Event of Default shall have occurred and

be continuing; and

(iv)    the Vadadustat FDA Approval has been received on or prior to the applicable Drawdown Date.

3.5.3    Tranche C: The obligation of the Lender to make the Loan under Tranche C is subject solely to the satisfaction or waiver of each of the following conditions:

(i)    receipt by the Lender Representative of an executed Drawdown Notice in accordance with Clause 3.2;

(ii)    Tranche B has been drawn in full prior to the applicable Drawdown Date;

(iii)    the representations and warranties set forth in Clause 7 and in each other Loan Document shall be true and correct in all material respects as of the applicable
Drawdown  Date  with  the  same  effect  as  though  made  as  of  such  date  (except  to  the  extent  that  such  representations  and  warranties  specifically  refer  to  an
earlier date, in which case they shall be true and correct in all material respects as of such earlier date);

(iv)    at the time of, and immediately after giving effect to the borrowing as of the applicable Drawdown Date, no Default or Event of Default shall have occurred and

be continuing; and

(v)    the Borrower Representative has raised at least $[**] in cumulative gross cash proceeds in the form of equity or equity linked securities in one or more series of
transactions  (including  any  public  offering,  private  placement  or  “at-the-market”  offering)  after  the  date  of  the  Loan  Agreement  (any  such  transaction,  a
“Capital Raise”).

3.6    Post-Closing Obligations

3.6.1    Within the time periods specified on Schedule C hereto (as each may be extended by the Lender Representative in its reasonable discretion), the Borrower Representative

shall complete (or cause to be completed) such undertakings as are set forth on Schedule C hereto.

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3.7    Use of Funds and Collateral

3.7.1    Unless the Lender Representative shall otherwise agree in writing, the Borrowers shall use the Loan solely for the purpose of general working capital, to repay certain
existing  indebtedness  on  the  Closing  Date,  for  other  general  corporate  purposes  and  for  any  other  purpose  not  prohibited  by  the  terms  of  this  Loan  Agreement
(including permitted acquisitions and investments). The Lender shall not be under any obligation to concern itself with the application of the Loan.

3.7.2    The security interest granted to the Lender Representative pursuant to the Security Documents shall form security for all monies and obligations owed to the Lender by

the Borrowers or any other Loan Party pursuant to this Loan Agreement or otherwise.

4.    TERM

4.1    Subject to Clause 15.1, this Loan Agreement is effective when executed and dated by the Lender and the Borrower Representative and shall continue until the later of (i)
termination  in  accordance  with  its  terms;  and  (ii)  the  date  upon  which  each  Borrower  shall  have  performed  and  satisfied  all  its  obligations  (including  making  all
payments)  under  this  Loan  Agreement  and  the  Security  Documents  (other  than  contingent  indemnification  and  expense  reimbursement  obligations  for  which  no
claim has been made).

5.    REPAYMENT AND PREPAYMENT

5.1    Repayments and Interim Payment

5.1.1    The Borrowers shall repay to the Lender Representative, in advance, principal (and interest in accordance with Clause 6.1) in respect of each Tranche on each Monthly
Repayment Date in the amounts specified in the repayment schedule issued by the Lender Representative prior to the relevant Drawdown Date and attached to the
relevant  Drawdown  Notice  as  may  be  revised  from  time  to  time  by  the  Lender  Representative  in  accordance  with  Clause  5.1.3  (the  "Repayment  Schedule"),
provided that all payments in relation to each Tranche shall comprise interest only for the Interest Only Period, and following the Interest Only Period, the Borrowers
shall  repay,  in  advance,  all  outstanding  principal  (and  interest  in  accordance  with  Clause  6.1)  in  respect  of  each  Tranche  in  equal  payments  on  each  Monthly
Repayment Date remaining, commencing with the first Monthly Repayment Date to occur after the end of the Interest Only Period (as an illustrative example, if, after
the  end  of  the  Interest  Only  Period,  thirteen  Monthly  Repayment  Dates  remain  before  the  Maturity  Date,  the  Borrowers  shall  repay  all  outstanding  principal  and
interest in thirteen equal payments: one on each such Monthly Repayment Date).

5.1.2    All payments that any Borrower makes under this Loan Agreement shall be made in full, without any deduction, set-off or counterclaim and in immediately available
funds  on  the  due  date  to  an  account  which  the  Lender  Representative  shall  specify  to  the  Borrower  Representative  in  writing  at  least  [**]  prior  to  the  applicable
Monthly Repayment Date.

5.1.3        The  Lender  Representative  shall  have  the  right  to  issue  a  revised  Repayment  Schedule  from  time  to  time  if  the  Lender  Representative,  in  its  reasonable  discretion,
considers it necessary in order to correct a ministerial error or to ensure that, in respect of each Tranche, on the expiry of the relevant Loan Term there will be no
amounts owing from the Borrowers to the Lender in respect of the relevant Tranche(s) (and any additional payment in respect of any prior period that is required due
to such revised Repayment Schedule shall be made by the Borrowers within [**] of their receipt of such revised Repayment Schedule (or, if applicable, returned by the
Lender  Representative  to  the  Borrowers  within  [**]  of  the  issuance  of  such  revised  Repayment  Schedule).  For  the  avoidance  of  doubt,  any  payment  of  an  amount
shown on a then-in effect Repayment Schedule shall not result in a Default or Event of Default due to a later revision of the Repayment Schedule.

5.1.4    Each payment received by the Lender Representative in respect of any Tranche shall be applied as follows:

(i)    first, to discharge all outstanding fees, costs, expenses and Unpaid Sums (other than any Unpaid Sums set forth in clause (ii) or (iii) below) that are then due to

the Lender in respect of such Tranche;

(ii)    secondly, to discharge all accrued and unpaid interest in respect of such Tranche; and

(iii)    thirdly, to reduce the outstanding principal balance of such Tranche.

5.1.5    Any amount repaid or prepaid may not be redrawn.

5.1.6    If any Drawdown Date is not a Monthly Repayment Date, the Borrowers shall pay to the Lender Representative, on such Drawdown Date (by way of deduction by the

Lender Representative of the amount of the Tranche actually advanced to the Borrowers), the Interim Payment.

5.2    Currency of Payments

Repayment of the Loan and payment of all other amounts owed to the Lender will be paid to the Lender Representative in the currency in which each Tranche has
been provided (the "Contractual Currency"), i.e. in Dollars, unless otherwise agreed by the Parties in writing. The Borrowers shall bear the cost in the event of and
in respect of any conversion by the Lender of an amount received by it in any currency other than the Contractual Currency.

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5.3    Advance Payment

On each Drawdown Date with respect to a Tranche, the Borrowers shall pay to the Lender Representative (by way of deduction by the Lender Representative from the
amount of the Tranche advanced to the Borrowers) the advance payment as set forth under the heading Loan Facility Terms at the beginning of this Loan Agreement
with respect to the applicable Tranche (the "Advance Payment")  which  shall  be  held  by  the  Lender  Representative  as  security  for  and  applied  in  or  towards  the
repayment amount (comprising principal and interest) for the last Month of the Loan Term of that particular Tranche unless a notice under Clause 9.2.2 has been
served, in which case the Advance Payment shall be applied, at the discretion of the Lender Representative, in accordance with Clause 5.1.4.

5.4    Prepayments

The Borrowers shall be entitled to prepay the Loan, in whole but not in part, subject to the following conditions:

5.4.1    the Borrower Representative shall submit to the Lender Representative a written notice of prepayment (which may be conditioned upon a specific event, in which case it
may  be  revoked  at  any  time  prior  to  the  proposed  repayment  date)  at  least  [**]  in  advance,  indicating  the  amount  to  be  prepaid  and  the  date  of  the  proposed
prepayment;

5.4.2    on the date of such optional prepayment (or of any acceleration), the Borrower Representative shall pay the Lender Representative an amount equal to:

(i)    the outstanding principal amount of the Loan;

(ii)    all accrued and unpaid interest;

(iii)    should the prepayment be made:

(a)    prior to the first anniversary of the Closing Date, a fee equal to the sum of (i) 4.00% of the amount repaid plus (ii) the aggregate of the Monthly interest
payments  scheduled  to  be  paid  by  the  Borrowers  on  each  Monthly  Repayment  Date  for  each  then-outstanding  Tranche  (as  is  set  out  in  the  relevant
Repayment  Schedule)  for  the  period  commencing  on  the  date  of  prepayment  and  ending  on  the  date  that  is  twelve  (12)  months  after  the  date  of
prepayment (the “Yield Maintenance Premium”); and/or

(b)    (I) on or after the first anniversary of the Closing Date, but prior to the [**], a fee equal to 4.00% of the amount repaid, (II) on or after the [**], but prior

to the [**]% of the amount repaid and (III) on or after the [**], but prior to the Maturity Date, 1.00% of the amount repaid (the “Early Payment Fee”);

(c)        Notwithstanding  anything  to  the  contrary  in  this  Loan  Agreement  or  any  other  Loan  Document,  it  is  understood  and  agreed  that  if  any  Loans  are
accelerated  (whether  as  a  result  of  the  occurrence  and  continuance  of  any  Event  of  Default,  by  operation  of  law  or  otherwise),  any  Yield  Maintenance
Premium and any Early Payment Fee, as applicable, determined as of the date of acceleration, will also be due and payable and will be treated and deemed
as though the applicable Loans were repaid as of such date and shall constitute part of the obligations for all purposes herein. Any Yield Maintenance
Premium and any Early Payment Fee, as applicable, shall also be payable in the event the obligations, the Loans and this Loan Agreement are satisfied or
released  by  foreclosure  (whether  by  power  of  judicial  proceeding),  deed  in  lieu  of  foreclosure  or  by  any  other  similar  means.  The  Group  Companies
expressly waive the provisions of any present or future statute or law that prohibits or may prohibit the collection of the applicable premium in connection
with  any  such  acceleration.  The  parties  hereto  further  acknowledge  and  agree  that  any  Yield  Maintenance  Premium  and  any  Early  Payment  Fee,  as
applicable, is not intended to act as a penalty or to punish the Group Companies for any repayment or redemption of the Loans. The Group Companies
expressly agree that (i) any Yield Maintenance Premium and any Early Payment Fee, as applicable, is reasonable and is the product of an arm’s length
transaction  between  sophisticated  business  people,  ably  represented  by  counsel,  (ii)  any  Yield  Maintenance  Premium  and  any  Early  Payment  Fee,  as
applicable,  shall  be  payable  notwithstanding  the  then  prevailing  market  rates  at  the  time  payment  is  made,  (iii)  there  has  been  a  course  of  conduct
between the Lender and the Group Companies giving specific consideration in this transaction for such agreement to pay any Yield Maintenance Premium
and any Early Payment Fee, as applicable, (iv) the Group Companies shall be estopped hereafter from claiming differently than as agreed to in this Clause,
(v) the agreement of the Group Companies to pay any Yield Maintenance Premium and any Early Payment Fee, as applicable, is a material inducement to
the Lender to extend the Loans, and (vi) any Yield Maintenance Premium and any Early Payment Fee, as applicable, represents a good-faith, reasonable
estimate  and  calculation  of  the  lost  profits  or  damages  of  the  Lender  and  that  it  would  be  impractical  and  extremely  difficult  to  ascertain  the  actual
amount of damages to the Lender or profits lost by the Lender as a result of such prepayment or acceleration.

(d)        Notwithstanding  anything  herein  to  the  contrary,  no  Yield  Maintenance  Premium  or  Early  Payment  Fee  shall  be  due  in  connection  with  an  optional
prepayment of the Loans that is in connection with a refinancing of the Loan Facility to the extent the Lender (or any Kreos Affiliate) will be a lender
under such new facility.

(iv)    all unpaid End of Loan Payments;

(v)    all unpaid fees, costs and expenses; and

(vi)    all other unpaid sums payable by the Borrowers to the Lender under the Loan Documents.

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5.5    Not later than the [**] following the receipt of Net Cash Proceeds in respect of any Asset Sale or Casualty Event, in each case, in excess of $[**] per transaction (or $[**] in
the aggregate per fiscal year), the Borrowers shall apply [**]% of the Net Cash Proceeds received with respect thereto to prepay outstanding Loans in accordance with
Clause  5.1.4;  provided,  that  only  the  amount  of  Net  Cash  Proceeds  in  excess  of  $[**]  per  transaction  or  $[**]  in  the  aggregate  per  fiscal  year  shall  be  subject  to
prepayment  pursuant  to  this  Clause  5.5.  Notwithstanding  anything  herein  to  the  contrary,  in  lieu  of  making  the  prepayment  contemplated  by  this  Clause  5.5,  the
Borrower  Representative  may  instead  elect  to  reinvest  such  Net  Cash  Proceeds  in  productive  assets  of  a  kind  then  used  or  usable  in  the  business  of  the  Borrower
Representative  and  its  Subsidiaries  (including,  without  limitation,  through  Permitted  Acquisitions  and  Permitted  Investments)  or  in  research  and  development,  so
long as (w) such reinvestment does not materially detract from the value of the Collateral (taken as a whole) as reasonably determined by the Borrower Representative
in consultation with the Lender Representative, (x) the Borrower Representative has delivered to the Lender Representative a certificate of the Borrowers’ intent to
reinvest such proceeds, (y) no Default or Event of Default is continuing as of the date of delivery of the certificate referred to in clause (x), and (z) such reinvestment is
made within [**] after receipt of such Net Cash Proceeds (or if a binding commitment to reinvest has been entered into within such [**] period, within [**] after the
end of such [**] period).

5.6    In the event that any Group Company shall receive Net Cash Proceeds from the issuance or incurrence of Financial Indebtedness for borrowed money that is not permitted
to be incurred pursuant to the terms of this Loan Agreement, the Borrowers shall, substantially simultaneously with (and in any event not later than the [**] following)
the receipt of such Net Cash Proceeds, apply an amount equal to [**]% of such Net Cash Proceeds to prepay the outstanding Loans in accordance with Clause 5.1.4.

5.7        In  the  event  that  the  Borrowers  seek  to  make  a  prepayment  in  connection  with  a  refinancing  of  this  Loan  Agreement  (a  “Proposed Refinancing”),  (i)  the  Borrower
Representative shall provide written notice to the Lender, (ii) the Lender and its Affiliates shall have the right (but not the obligation) to make a proposal to provide all
or a portion of such Proposed Refinancing by providing written notice to the Borrower Representative within [**] after receipt of any notice of a Proposed Refinancing
(such proposal, a “Financing Proposal”), which the Borrower Representative may elect to accept or decline in its sole discretion; provided that, during such [**] period,
neither the Borrower Representative nor any of its Subsidiaries may enter into exclusivity with a third party with respect to the Proposed Refinancing or consummate
any such Proposed Refinancing.

6.    INTEREST

6.1    The Borrowers shall pay to the Lender Representative, in advance, all unpaid and accrued interest in respect of each Tranche outstanding on each Monthly Repayment
Date; provided that if the Borrowers prepay any Tranche on a day other than a Monthly Repayment Date, the Lender Representative shall return to the Borrower the
amount of interest paid that exceeds the amount of interest that accrued.

6.2    Interest on the principal amount of each Tranche from time to time shall accrue from day to day at a rate of Adjusted Term SOFR plus six point seven five per cent (6.75%
per annum) (the “Applicable Interest Rate”), from the applicable Drawdown Date until the repayment in full of such Loan; provided that the all-in interest rate
shall not exceed 15.00% per annum. Interest on the Loan and each part thereof shall be paid to the Lender Representative on each Monthly Repayment Date in the
Contractual Currency in the amounts to be specified in the Repayment Schedule.

6.3    Time of payment of any sum due from the Borrowers is of the essence under this Loan Agreement. If the Borrowers fail to pay any sum to the Lender Representative on its
due date for payment (after the expiration of any grace periods therefor), the Borrowers shall pay to the Lender Representative forthwith, on demand, interest on such
overdue sum (compounded on a Monthly basis) from the due date (or, if later, the date of expiration of the applicable grace period) to the date of actual payment (as
well after as before judgment) at a rate equal to the Applicable Interest Rate plus three per cent (3%) per annum. If the Borrowers fail to pay any sum within [**] after
such sum is due and payable, the Borrowers shall pay to the Lender forthwith on demand, a one-off late payment charge of two per cent (2)% of such overdue sum, to
compensate the Lender for additional administrative expense.

6.4    

(i)        Notwithstanding  anything  to  the  contrary  herein  or  in  any  other  Loan  Document,  upon  the  occurrence  of  a  Benchmark  Transition  Event,  the  Lender
Representative and the Borrower Representative may amend this Loan Agreement to replace the then-current Benchmark with a Benchmark Replacement. No
replacement  of  the  then-current  Benchmark  with  a  Benchmark  Replacement  pursuant  to  this  clause  (i)  shall  occur  prior  to  the  applicable  Benchmark
Transition Start Date.

(ii)        In  connection  with  the  use,  administration,  adoption  or  implementation  of  a  Benchmark  Replacement,  the  Lender  Representative  shall  have  the  right  (in
consultation  with  the  Borrower)  to  make  Benchmark  Replacement  Conforming  Changes  from  time  to  time  and,  notwithstanding  anything  to  the  contrary
herein or in any other Loan Document, any amendments implementing such Benchmark Replacement Conforming Changes will become effective without any
further action or consent of any other party to this Loan Agreement.

(iii)    The Lender Representative shall promptly notify the Borrower Representative of (A) any occurrence of a Benchmark Transition Event and its related Benchmark
Replacement  Date  and  Benchmark  Transition  Start  Date,  (B)  the  implementation  of  any  Benchmark  Replacement,  (C)  the  effectiveness  of  any  Benchmark
Replacement  Conforming  Changes  and  (D)  (x)  the  removal  or  reinstatement  of  any  tenor  of  a  Benchmark  pursuant  to  clause  (iv)  below  and  (y)  the
commencement  or  conclusion  of  any  Benchmark  Unavailability  Period.  Any  determination,  decision  or  election  that  may  be  made  by  the  Lender
Representative pursuant to this Clause, including any determination with respect to a tenor, rate or adjustment or of the occurrence or non-occurrence of an
event, circumstance or date and any decision to take or refrain from taking any action, will be conclusive and binding absent manifest error and may be made
in its or their sole discretion and without consent from any other party hereto, except, in each case, as expressly required pursuant to this Clause.

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(iv)    Notwithstanding anything to the contrary herein or in any other Loan Document, at any time (including in connection with the implementation of a Benchmark
Replacement), (x) if the then-current Benchmark is a term rate (including the Term SOFR Reference Rate) and either (A) any tenor for such Benchmark is not
displayed on a screen or other information service that publishes such rate from time to time as selected by the Lender Representative or (B) the regulatory
supervisor  for  the  administrator  of  such  Benchmark  has  provided  a  public  statement  or  publication  of  information  announcing  that  any  tenor  for  such
Benchmark is not or will not be representative, then the Lender Representative may modify the interest period (or any similar or analogous definition) for any
Benchmark settings at or after such time to remove such unavailable or non-representative tenor and (y) if a tenor that was removed pursuant to clause (x)
above either (A) is subsequently displayed on a screen or information service for a Benchmark (including a Benchmark Replacement) or (B) is not, or is no
longer,  subject  to  an  announcement  that  it  is  not  or  will  not  be  representative  for  a  Benchmark  (including  a  Benchmark  Replacement),  then  the  Lender
Representative  may  modify  the  interest  period  (or  any  similar  or  analogous  definition)  for  all  Benchmark  settings  at  or  after  such  time  to  reinstate  such
previously removed tenor.

(v)    Upon the Borrower Representative’s receipt of notice of the commencement of a Benchmark Unavailability Period, the Borrower Representative may revoke any
request for a SOFR Borrowing, conversion to or continuation of SOFR Loans to be made, converted or continued during any Benchmark Unavailability Period.

7.    REPRESENTATIONS AND WARRANTIES

7.1    Each Borrower warrants and represents to the Lender, jointly and severally, that except as set forth on Schedule H, as of the date of this Loan Agreement:

7.1.1    (i) each Loan Party and each material Domestic Subsidiary is a corporation or limited liability company, as applicable, duly organized and validly existing under the laws
of its state of incorporation or formation, as applicable and (ii) each material Subsidiary that is not a Domestic Subsidiary is duly organized and validly existing under
the laws of its country of incorporation;

7.1.2    each Loan Party has the corporate capacity, and has taken all corporate action and obtained all corporate consents, necessary for it:

(i)    to execute the Loan Documents to which it is or is to be party;

(ii)    to borrow under this Loan Agreement and to make all the payments contemplated by, and to comply with all its other obligations under the Loan Documents to

which it is or is to be party; and

(iii)    subject to the Perfection Exceptions, to grant the Lender Representative a first priority Security Interest in respect of the Collateral pursuant to the Security

Documents to which it is or is to be party;

7.1.3    each Group Company has good, valid and marketable title to, or valid leases and licences of, and all appropriate authorizations to use, the assets necessary to carry on its

business as it is being conducted, except in each case where the failure to possess the same would not reasonably be expected to have a Material Adverse Change;

7.1.4    [reserved];

7.1.5    the Loan Documents to which any Loan Party is or is to be party, do now or, as the case may be, will, upon execution and delivery (and, where applicable, registration as

provided for in the Loan Documents):

(i)    constitute the relevant Loan Party’s legal, valid and binding obligations enforceable against it in accordance with their respective terms; and

(ii)    subject to the Perfection Exceptions, create legal, valid and binding security interests enforceable in accordance with their respective terms;

in  each  case  subject  to  subject  to  the  effects  of  bankruptcy,  insolvency,  fraudulent  conveyance,  reorganization,  moratorium  and  other  similar  laws  relating  to  or
affecting creditors’ rights generally, and general equitable principles (whether considered in a proceeding in equity or at law);

7.1.6        the  execution  and  (where  applicable)  registration  by  any  Loan  Party  of  the  Loan  Documents  to  which  it  is  or  is  to  be  party  and  the  performance  of  the  transactions
contemplated thereunder, and the borrowing by each Borrower of the Loan and the compliance by each Loan Party with the Loan Documents to which it is or is to be
party, will not involve or lead to a contravention of:

(i)    any applicable material law or other material legal or regulatory requirement;

(ii)    the organizational documents of such Loan Party; or

(iii)    any material contractual or other obligation or restriction which is binding on any Borrower or any other Group Company or any of their assets;

22

7.1.7    the payment obligations under the Loan Documents of the Loan Parties rank at least pari passu with the claims of all its other unsecured and unsubordinated creditors,

except for obligations mandatorily preferred by law applying to companies generally;

7.1.8    all material consents, licences, approvals and authorizations required by any Loan Party in connection with the entry into, performance, validity and enforceability of the
Loan Documents to which it is or is to be party have been or (upon execution thereof) shall have been obtained by the Drawdown Date and are (or upon execution
thereof shall be) in full force and effect during the life of this Loan Agreement, except in each case where the failure to obtain or possess the same would not reasonably
be expected to have a Material Adverse Change;

7.1.9    all authorizations necessary for the conduct of the business, trade and ordinary activities of members of the Group have been obtained or effected and are in full force and

effect, except in each case where the failure to obtain or possess the same would not reasonably be expected to have a Material Adverse Change;

7.1.10        no  corporate  action,  legal  proceeding  or  other  procedure  or  circumstance  (including  any  creditors’  process)  described  in  Clauses  9.1.7  has  been  taken,  or  to  the

knowledge of the Borrower Representative, threatened in writing in relation to a member of the Group;

7.1.11    [reserved];

7.1.12    [reserved];

7.1.13    no financial or other written information furnished by or on behalf of any Borrower in connection with the negotiation of the Loan Documents delivered to the Lender
pursuant  to  the  Loan  Documents  (other  than  projected  financial  information,  pro  forma  financial  information  and  information  of  a  general  economic  or  industry
nature), when taken as a whole, contains any material misstatement of fact or omits to state any material fact necessary to make the statements therein (when taken as
a whole), in the light of the circumstances under which they were made, not materially misleading; provided that, with respect to projected and pro forma financial
information,  the  Borrowers  represent  only  that  such  information  was  prepared  in  good  faith  based  upon  assumptions  believed  to  be  reasonable  at  the  time  of
preparation and delivery; it being understood that actual results may vary from such forecasts and that such variances may be material;

7.1.14    the Financial Statements were prepared in accordance with GAAP and consistently applied, except as expressly noted therein, and fairly represent (in conjunction with
the notes thereto) in all material respects the financial condition of the Borrower Representative as at the date to which they were drawn up and the results of the
Borrower Representative’s operations during the financial year then ended;

7.1.15    since November 8, 2023, there has been no Material Adverse Change in the business or financial condition of the Group;

7.1.16    [reserved];

7.1.17    there is no litigation, action, proceeding, arbitration, investigation or claim pending or, so far as the Borrower Representative is aware, threatened in writing against any

Group Company before any court or administrative agency which would reasonably be expected to have a Material Adverse Change;

7.1.18    no judgment or order of a court, arbitral body or agency which would reasonably be expected to have a Material Adverse Change has been made against it or any Group

Company;

7.1.19    the Borrowers or the relevant Loan Party owns with good and marketable title all the Collateral, free from all security interests (other than Permitted Security Interests),
and all the Collateral is in good operating condition and repair, and are adequate for the uses to which they are being put, and none of such Collateral are in need of
maintenance or repairs except for ordinary, routine maintenance and repairs that are not material in nature or cost;

7.1.20    the Group has no Financial Indebtedness other than Permitted Financial Indebtedness;

7.1.21    the Group has not granted any security over its assets to any third party except for Permitted Security Interests;

7.1.22        no  other  event  or  circumstance  is  outstanding  which  constitutes  a  default  under  any  other  agreement  or  instrument  which  is  binding  on  any  Borrower  or  any  other
Group Company or to which its (or any of Group Company’s) assets are subject, in each case, which would reasonably be expected to cause a Material Adverse Change;

7.1.23    no Borrower nor any other Group Company has breached any law or regulation which breach has or would reasonably be expected to have a Material Adverse Change;

7.1.24        no  labour  disputes  are  current  or,  to  the  best  of  its  knowledge  and  belief  (after  having  made  due  and  careful  enquiry)  has  been  threatened  in  writing  against  any

Borrower or any other Group Company which has or would reasonably be expected to have a Material Adverse Change;

7.1.25    each Borrower and each other Group Company is the sole legal and beneficial owner of, or otherwise to its knowledge, holds the necessary rights to use, the Intellectual

Property used in its business other than Permitted Licenses;

23

7.1.26    no material part of any Intellectual Property owned by any Borrower or a Group Company that is material to its business as of the date hereof or material to the business

contemplated to be conducted in the future has been judged invalid or unenforceable, in whole or in part;

7.1.27    to the knowledge of Borrower, no Borrower or a Group Company, in carrying on its business, infringes any Intellectual Property of any third party which has caused, or

would reasonably be expected to cause, a Material Adverse Change;

7.1.28    each Borrower and each other Group Company has taken all formal or procedural actions (including payment of fees) as reasonably required to: (i) maintain its material

Intellectual Property; (ii) maintain the confidentiality of any trade secrets; and (iii) to register any registrable Intellectual Property that is material to its business;

7.1.29        no  Borrower  nor  any  other  Group  Company  is  aware  of  any  current,  pending  or  threatened  (in  writing)  challenge  or  objection  by  any  third  party  to  its  use  of  any
Intellectual  Property,  or  to  the  knowledge  of  Borrower,  the  infringement  of  any  of  its  Intellectual  Property  by  any  third  party,  in  each  case  where  such  challenge,
objection or infringement has caused, or would reasonably be expected to cause, a Material Adverse Change;

7.1.30    [reserved];

7.1.31    [reserved];

7.1.32    no Borrower or any Subsidiary is required to be registered as an “investment company” under the Investment Company Act of 1940;

7.1.33    none of the Borrowers, any of the Group Companies, any of their respective directors or officers, nor, to the knowledge of the Borrower Representative, any of their

respective employees, or any of their respective agents who act in any capacity in connection with the Loan Facility, is or are a Sanctioned Person;

7.1.34        in  the  past  five  years,  each  Borrower  and  each  of  the  Group  Companies  and  each  of  their  respective  directors  and  officers,  and,  to  the  knowledge  of  the  Borrower
Representative, each of their respective employees and agents, in connection with their activities related to the Borrower or any Group Company, have conducted their
business in compliance with all applicable Anti-Corruption Laws, Anti-Money Laundering Laws and Sanctions;

7.1.35    [reserved];

7.1.36        no  loan,  use  of  proceeds  or  transaction  contemplated  by  this  Loan  Agreement  will  directly,  or  to  the  knowledge  of  the  Borrower  Representative,  indirectly,  violate

applicable Anti-Corruption Laws, Anti-Money Laundering Laws or Sanctions;

7.1.37        each  Borrower  and  each  other  Group  Company  have  instituted  and  maintain  in  effect  policies  and  procedures  reasonably  designed  to  promote  compliance  by  each
Borrower  and  each  other  Group  Company  and  their  respective  directors,  officers,  employees,  agents  and  representatives  with  all  applicable  Anti-Corruption  Laws,
Anti-Money Laundering Laws and Sanctions;

7.1.38    [reserved];

7.1.39    [reserved];

7.1.40    each Borrower and each other Group Company is in compliance in all material respects with the EU General Data Protection Regulation 2016/679, the Data Protection
Act 2018 and any other analogous legislation in any applicable jurisdiction, in each case that is applicable to it and other than to the extent failure to so comply would
not reasonably be expected to result in a Material Adverse Change;

7.1.41    no Borrower or any of its respective Subsidiaries is engaged principally, or as one of its important activities, in the business of extending credit for the purpose of buying
or carrying Margin Stock. No part of the proceeds of any Loan will be used for any purpose that entails a violation of, or that is inconsistent with, the provisions of the
Regulations of the Board, including Regulation T, U or X;

7.1.42    immediately after the consummation of the transactions to occur on the date of this Loan Agreement and immediately following the making of each Loan and after
giving  effect  to  the  application  of  the  proceeds  of  each  Loan,  (a)  the  aggregate  fair  value  of  the  assets  of  the  Group  will  exceed  the  aggregate  debts  and  liabilities,
subordinated, contingent or otherwise, of the Group; (b) the aggregate present fair saleable value of the property of the Group will be greater than the amount that will
be  required  to  pay  the  probable  liability  of  the  debts  and  other  liabilities  of  the  Group,  subordinated,  contingent  or  otherwise,  as  such  debts  and  other  liabilities
become absolute and matured; (c) the Group does not believe that it will incur debts and liabilities, subordinated, contingent or otherwise, beyond its ability to pay
such debts and liabilities as they become absolute and matured; and (d) the Group will not have unreasonably small capital with which to conduct the business in
which it is engaged as such business is now conducted and is proposed to be conducted following the date of this Loan Agreement;

7.1.43    except as would not reasonably be expected to have a Material Adverse Change, each Borrower is in compliance with the applicable provisions of ERISA and the Code
and  the  regulations  and  published  interpretations  thereunder.  No  ERISA  Event  has  occurred  or  is  reasonably  expected  to  occur  that,  when  taken  together  with  all
other such ERISA Events, would reasonably be expected to result in a material liability of any Borrower or any of its ERISA Affiliates. The present value of all benefit
liabilities under each Plan (based on the assumptions used for purposes of Statement of Financial Accounting

24

Standards No. 87, as amended) did not, as of the last annual valuation date applicable thereto, exceed the fair market value of the assets of such Plan;

7.1.44    except as would not reasonably be expected to have a Material Adverse Change, each Foreign Pension Plan is in compliance with all laws applicable thereto and the
respective requirements of the governing documents for such plan. With respect to each Foreign Pension Plan, no Borrower, its respective Affiliates or any of their
respective directors, officers, employees or agents has engaged in a transaction which would subject any Borrower or any Subsidiary, directly or indirectly, to a tax or
civil penalty which would reasonably be expected, individually or in the aggregate, to result in a Material Adverse Change. With respect to each Foreign Pension Plan,
reserves have been established in the financial statements furnished to the Lender Representative in respect of any unfunded liabilities in accordance with applicable
law  and  prudent  business  practice  or,  where  required,  in  accordance  with  ordinary  accounting  practices  in  the  jurisdiction  in  which  such  Foreign  Pension  Plan  is
maintained, except as would not reasonably be expected to result in a Material Adverse Change; and

7.1.45    each Borrower and its respective Subsidiaries has filed or caused to be filed all U.S. federal and state income tax returns and other material U.S. federal, state, local and
foreign tax returns or materials required to have been filed by it and has paid or caused to be paid all material taxes due and payable by it and all assessments received
by it, except taxes that are being contested in good faith by appropriate proceedings and for which such Borrower or such Subsidiary, as applicable, shall have set aside
on its books adequate reserves.

7.1.46    The Borrowers’ representations and warranties set out in this Loan Agreement shall survive the execution and dating of this Loan Agreement.

8.    UNDERTAKINGS

Each Borrower undertakes to the Lender, jointly and severally, to comply with the following provisions of this Clause 8 at all times during the Security Period, except
as the Lender Representative may otherwise agree in writing:

8.1    Affirmative Undertakings

8.1.1    each Borrower shall (and shall procure that each Group Company shall) comply in all respects with all laws, ordinances and regulations to which it/they may be

subject, if failure so to comply has or would reasonably be expected to result in a Material Adverse Change;

8.1.2    each Borrower shall (and shall procure that each Group Company shall) obtain, effect and keep effective all permissions, licences, consents and permits which
may from time to time be required to conduct its business, in each case to the extent that failure to so obtain, effect or keep effective would or would reasonably
be likely to result in a Material Adverse Change.

8.1.3    each Borrower shall (and shall procure that each Group Company shall) do or cause to be done all things necessary to preserve, renew and keep in full force and

effect its legal existence except in a transaction permitted under Clause 8.2.1 or 8.2.5;

8.1.4    each Borrower shall (and shall procure that each Group Company shall) comply in all respects with all laws to which it may be subject, if failure to so comply

has or would reasonably be expected to result in a Material Adverse Change;

8.1.5    each Borrower shall (and shall ensure that each Group Company shall) comply with all Environmental Law and implement procedures reasonably designed to

monitor compliance with and to prevent liability under any Environmental Law;

8.1.6    each Borrower shall (and to the extent any Loan Party has pledged its assets pursuant to a Security Document, each Borrower shall procure that such Loan
Party  shall)  own  only  for  its  own  account  the  Collateral  free  from  all  Security  Interests  and  other  interests  and  rights  of  every  kind,  except  for  Permitted
Security Interests and Permitted Agreements;

8.1.7    the Borrower Representative shall provide to the Lender Representative, promptly upon becoming aware of them, the details of any litigation, arbitration or
administrative proceedings which are current, threatened in writing or pending against any member of the Group and which would, if adversely determined,
reasonably be expected to constitute a Material Adverse Change;

8.1.8    the Borrower Representative shall provide to the Lender Representative, promptly upon becoming aware of them, the details of any judgment or order of a
court,  arbitral  body  or  agency  which  is  made  against  any  member  of  the  Group  and  which  would  reasonably  be  expected  to  constitute  a  Material  Adverse
Change;

8.1.9    the Borrower Representative shall provide the Lender Representative with:

(i)    within [**] after the end of each fiscal year, its audited consolidated balance sheet and related audited consolidated statements of income, stockholders’
equity and cash flows showing the consolidated financial condition of the Borrower Representative and its consolidated Subsidiaries as of the close of
such fiscal year and the results of its operations and the operations of such Subsidiaries during such year, together with comparative figures for the
immediately preceding fiscal year, all audited by independent public accountants of recognized national standing and accompanied by an opinion of
such accountants (which

25

opinion  shall  not  include  (i)  an  explanatory  paragraph  expressing  substantial  doubt  about  the  ability  of  the  Borrower  Representative  and  its
consolidated Subsidiaries to continue as a going concern or (ii) any qualification or exception as to the scope of such audit (provided that such opinion
may contain exceptions, qualifications or explanatory paragraphs that are with respect to, or resulting from, (A) an upcoming maturity date under the
Loan  Facility  or  other  indebtedness  incurred  in  compliance  with  this  Loan  Agreement,  (B)  any  actual  or  potential  inability  to  satisfy  a  financial
maintenance  covenant,  including  the  applicable  financial  covenant  under  Clause  8.3,  on  a  future  date  or  in  a  future  period,  (C)  a  “going  concern”
qualification or explanatory paragraph (or similar exception) with respect to liquidity or (D) an “emphasis of matter” paragraph) to the effect that such
consolidated financial statements fairly present the financial condition and results of operations of the Borrower Representative and its consolidated
Subsidiaries on a consolidated basis in accordance with GAAP consistently applied, together with a customary “management discussion and analysis”
provision;

(ii)    within [**] after each of the first three fiscal quarters of each fiscal year of the Borrower Representative, its unaudited consolidated balance sheet and
related unaudited consolidated statements of income, stockholders’ equity and cash flows showing the consolidated financial condition of the Borrower
Representative  and  its  consolidated  Subsidiaries  as  of  the  close  of  such  fiscal  quarter  and  the  results  of  its  operations  and  the  operations  of  such
Subsidiaries during such fiscal quarter and the then elapsed portion of the fiscal year, and comparative unaudited figures for the same periods in the
immediately preceding fiscal year, all certified by one of its Financial Officers as fairly presenting the financial condition and results of operations of the
Borrower  Representative  and  its  consolidated  Subsidiaries  on  a  consolidated  basis  in  accordance  with  GAAP  consistently  applied,  subject  to  normal
year-end audit adjustments, together with a customary “management discussion and analysis” provision;

(iii)    [reserved];

(iv)    (A) concurrently with any delivery of financial statements under the foregoing clauses (i) and (ii) above and (B) within [**] after the end of each of the
first two fiscal months of each fiscal quarter (commencing with the month ended February 29, 2024), a certificate of a Financial Officer in substantially
the  form  attached  as  Schedule  B  to  this  Loan  Agreement  (a  "Compliance  Certificate"),  (x)  except  with  respect  to  any  Compliance  Certificate
delivered pursuant to clause (B) above, certifying that no Default or Event of Default has occurred and is continuing or, if such a Default or Event of
Default has occurred and is continuing, specifying the nature and extent thereof and any corrective action taken or proposed to be taken with respect
thereto,  (y)  setting  forth  computations  in  reasonable  detail  satisfactory  to  the  Lender  Representative  demonstrating  compliance  with  the  financial
covenant contained in Clause 8.3 and (z) except with respect to any Compliance Certificate delivered pursuant to clause (B) above, including the details
of  any  Group  Company  incorporated  or  acquired  on  or  after  the  date  of  this  Loan  Agreement  to  the  extent  not  previously  disclosed  to  the  Lender
Representative;

(v)    at the request of the Lender Representative, after the date of delivery of the financial information required pursuant to the foregoing clauses (i) and (ii),
the chief executive officer and/or the chief financial officer (or other applicable senior officer) of the Borrower Representative will hold and participate
in a [**] conference call or teleconference at a time selected by the Borrower Representative and reasonably acceptable to the Lender Representative to
(i) review such financial information with respect to the previous [**], and the financial condition of the Borrower Representative and its Subsidiaries
and (ii) discuss the operating performance, clinical progress financial condition and strategy of the Group;

(vi)        within  [**]  of  their  approval  by  the  relevant  board  of  directors  of  such  Group  Company,  a  consolidated  budget  showing:  (i)  a  projected  quarterly
consolidated  profit  and  loss  statement  (presented  in  management  statement  format,  excluding  non-cash  items  such  as  depreciation,  amortization,
stock-compensation and non-recurring items), (ii) a projected quarterly cash forecast for the forthcoming financial year and (iii) solely to the extent
available in the customary practice of the Group, a projected quarterly consolidated balance sheet, in each case in the form customarily prepared by the
Borrower Representative (collectively, a "Budget");

(vii)    any revised version of a Budget previously provided to the Lender Representative pursuant to clause (vi) above within [**] of the approval by the relevant

board of directors of the relevant Group Company of such revised Budget;

(viii)        promptly  after  written  request  therefore,  such  further  information  regarding  the  financial  condition,  business  and  operations  of  any  member  of  the

Group as the Lender Representative may reasonably request; and

(ix)    all material documents or summaries thereof dispatched by the Borrower Representative and each other Group Company to all of its shareholders or to
its secured creditors generally, promptly after the time they are delivered to the shareholders or secured creditors; provided that the Group shall not be
required to disclose any such information that presents a conflict of interest, is confidential or otherwise protected by attorney-client privilege;

provided, that any documents required to be delivered pursuant to Clause 8.1.9 (or to the extent any such documents are included in materials otherwise filed
with the SEC) may be delivered electronically or by filing with the SEC and if so delivered or filed, shall be deemed to have been delivered on the date on which
such documents are posted on the relevant internet or intranet website, if any, to which the Lender Representative has access (including EDGAR); provided
that  the  Borrower  shall  notify  (which  may  be  by  facsimile  or  electronic  mail)  the  Lender  Representative  of  the  posting  of  any  such  documents  described  in
clauses (i) and (ii) above and provide to

26

the Lender Representative by electronic mail electronic versions (i.e., soft copies) of such documents to the extent requested by the Lender Representative.

8.1.10    the Borrower Representative shall provide to the Lender Representative all documents, confirmations and evidence reasonably requested in writing by any
Lender (through the Lender Representative) to satisfy its "know your customer" requirements or similar identification checks (including the USA PATRIOT
Act) in order to meet its obligations from time to time under applicable money laundering, or similar, laws and regulations;

8.1.11    promptly upon becoming aware of a Vadadustat Withdrawal Event, the Borrower Representative shall provide notice thereof to the Lender Representative;

8.1.12    during the continuance of an Event of Default pursuant to Clause 9.1.2, 9.1.3 (solely with respect to a breach of Clause 8.3) or 9.1.7, at the written request of the
Lender Representative, (x) the Lender Representative shall be entitled to have a representative attend all meetings of the Borrower Representative's (and each
Group  Company's)  board  of  directors  and/or  any  committee  thereof  in  a  non-voting  observer  capacity  and  (y)  the  Borrower  Representative  agrees  to  give
notice of all such board and committee meetings to the Lender Representative at the same time as to its directors, and to facilitate attendance of the Lender
Representative’s representative at such board and/or committee meetings;

8.1.13    each Borrower shall (and shall procure that each Loan Party shall) maintain in force and promptly obtain or renew all consents required:

(i)    for each Borrower and each other Loan Party to perform its obligations under the Loan Documents, as relevant;

(ii)    for the legality, validity, admissibility or enforceability of the Loan Documents; and

(iii)    for each Borrower and each other Loan Party to continue to own the Collateral (except to the extent such Collateral will cease to constitute Collateral as

the result of a Permitted Transfer, Permitted Investment or other transaction expressly permitted by the terms of this Loan Agreement),

and each Borrower shall, and shall procure that each Loan Party shall, comply with the terms of all such consents;

8.1.14        the  Borrower  Representative  shall  notify  the  Lender  Representative  promptly  after  it  becomes  aware  of  the  occurrence  of  any  Event  of  Default,  and  shall

thereafter keep the Lender Representative fully up to date with all material developments as reasonably requested by the Lender Representative;

8.1.15    insurance matters:

(i)    the Borrower Representative shall (and shall ensure that each Group Company shall) maintain adequate risk protection through insurances on and in
relation to its business and assets to the extent reasonably required on the basis of good business practice (as reasonably determined by the Borrower
Representative), taking into account, inter alia, its (and any Group Company's) financial position and nature of operations. All insurances must be
with reputable independent insurance companies or underwriters (as reasonably determined by the Borrower Representative);

(ii)    Subject to Clause 3.6, the Borrower Representative shall (A) use reasonable best efforts to ensure that the Lender Representative shall be named as (x)
an additional insured with respect to the U.S. general liability insurance policies (which, for the avoidance of doubt, shall not include any directors
and officers policies, workers compensation, business interruption policies or cyber policies) maintained by a Loan Party and (y) lender’s loss payee
with respect to the U.S. general property insurance policies maintained by a Loan Party and (B) use commercially reasonable efforts to cause each
such policy to provide that it shall not be cancelled, modified or not renewed (x) by reason of nonpayment of premium upon not less than [**] prior
written  notice  thereof  by  the  insurer  to  the  Lender  Representative  (giving  the  Lender  Representative  the  right  to  cure  defaults  in  the  payment  of
premiums) or (y) for any other reason upon not less than [**] prior written notice thereof by the insurer to the Lender Representative; provided that,
unless an Event of Default shall have occurred and be continuing and the Lender Representative shall have exercised its rights pursuant to Clause 9.2
of this Loan Agreement, (1) all proceeds from insurance policies shall be paid to the applicable Loan Party, (2) to the extent any Lender receives any
insurance  proceeds,  such  Lender  shall  promptly  turn  over  to  the  Borrower  Representative  such  amounts  received  by  it  as  an  additional  insured  or
lender’s loss payee, and (3) the Lender agrees that the Borrower Representative and/or its Subsidiaries shall have the sole right to adjust or settle any
claims under such insurance;

8.1.16        subject  to  the  Perfection  Exceptions  and  any  other  exceptions,  thresholds,  limitations  and  deadlines  contained  in  this  Loan  Agreement  or  the  other  Loan
Documents, each Borrower shall at the request of the Lender Representative from time to time (and shall procure that each Group Company shall) promptly
execute and deliver such further documents creating Security Interests in favour of the Lender Representative over such assets of the relevant Group Company
and in such form as the Lender Representative may reasonably require in its discretion from time to time to: (i) secure all monies, obligations and liabilities of
the Borrowers and/or any Group Company to the Lender Representative under the Loan Documents; (ii) facilitate the realisation of the Collateral (it being
understood that the Collateral shall not be realized upon unless an Event of Default is continuing); and/or (iii) exercise the powers conferred on the Lender
Representative or a receiver or administrator appointed under any Security Document;

27

8.1.17    each Borrower shall (and shall procure that each Group Company shall) maintain in good working order and condition (ordinary wear and tear excepted) all of
its assets necessary or desirable in the conduct of its business (subject to Permitted Transfers, Permitted Investments or other transactions permitted pursuant
to the terms of this Loan Agreement);

8.1.18    each Borrower shall (and it shall procure each Group Company shall):

(i)    preserve and maintain the subsistence and validity of all Intellectual Property material to the operation of its business;

(ii)    use commercially reasonable efforts to prevent, and take action against, any infringement in any material respect of the Intellectual Property necessary

for its business;

(iii)    prosecute and maintain all applications and registrations in place in respect of material Intellectual Property which it has now or makes hereinafter
and  pay  all  registration  fees  and  taxes  necessary  to  maintain  such  Intellectual  Property  in  full  force  and  effect  and  record  its  interest  in  such
Intellectual Property unless in Borrower’s reasonable judgement, such Intellectual Property is either (i) immaterial or (ii) no longer required in the
ordinary course of the Group's business; and

(iv)    not use or permit the Intellectual Property necessary for its business to be used in a way or take any step or omit to take any step in respect of such
Intellectual Property which would reasonably likely materially and adversely affect the existence or value of such Intellectual Property or imperil the
right of the Group to use such Intellectual Property.

8.1.19    each Borrower shall (and shall procure that each Group Company shall) at all times comply with the requirements of all applicable Anti-Corruption Laws,

Anti-Money Laundering Laws and Sanctions;

8.1.20        each  Borrower  shall  (and  shall  procure  that  each  Group  Company  shall)  maintain  in  effect  and  enforce  policies  and  procedures  reasonably  designed  to

promote compliance with applicable Anti-Corruption Laws, Anti-Money Laundering Laws and Sanctions;

8.1.21    each Borrower shall (and shall procure that each Group Company shall) pay and discharge all material Taxes imposed upon it or its assets within the time
period  allowed  without  incurring  penalties  unless  and  only  to  the  extent  that  such  payment  is  being  contested  in  good  faith,  adequate  reserves  are  being
maintained for those Taxes and the costs required to contest them and reasonable details of which have been expressly notified to the Lender Representative in
writing, and such payment can be lawfully withheld;

8.1.22    each Borrower shall (and shall procure that each Group Company shall) keep proper books of record and account in which full, true and correct entries in

conformity with GAAP and all requirements of any applicable laws are made of all dealings and transactions in relation to its business and activities.

8.1.23    the Borrower Representative will, and will cause each of its Subsidiaries to, permit any representatives of the Lender Representative to visit and inspect the
financial records and the properties of such person at reasonable times and as often as reasonably requested and to make extracts from and copies of such
financial records, and permit any representatives designated by the Lender Representative to discuss the affairs, finances and condition of such person with the
officers thereof; provided that if no Event of Default has occurred and is continuing, then the (i) the Lender Representative shall conduct no more than [**]
such  inspections  per  calendar  year  (in  the  aggregate  for  all  such  representatives)  and  (ii)  Borrowers’  reimbursement  obligations  with  respect  to  such
inspections shall be limited to [**] (in the aggregate for all such representatives) per calendar year;

8.1.24    each Borrower shall (and shall procure that each Group Company shall) subordinate any existing and future loans between the Group Companies to the rights
and interests hereunder pursuant to the Intercompany Subordination Agreement or another subordination agreement reasonably satisfactory to the Lender
Representative;

8.1.25    if the Borrower Representative shall form or acquire any new direct or indirect Subsidiary (other than an Excluded Subsidiary) or any Subsidiary shall cease to
be an Excluded Subsidiary, it shall, (i) within [**] after the acquisition, formation or cessation thereof, cause any such Subsidiary that is a Domestic Subsidiary
to  become  a  Loan  Party  and  (ii)  within  [**]  after  the  acquisition,  formation  or  cessation  thereof,  cause  any  such  Subsidiary  that  is  a  Foreign  Subsidiary  to
become a Loan Party, in each case by delivering to the Lender Representative:

(i)    in the case of any such Subsidiary that is to become an additional Borrower, a duly executed joinder to this Loan Agreement in form and substance

reasonably satisfactory to the Lender Representative;

(ii)    in the case of any such Domestic Subsidiary, a duly executed joinder to the Guarantee and Collateral Agreement, in form and substance reasonably

satisfactory to the Lender Representative;

(iii)    in the case of any such Foreign Subsidiary, a New York law guarantee agreement and a security agreement governed by the laws of the jurisdiction of

organization of such Foreign Subsidiary, in each case in form and substance reasonably satisfactory to the Lender Representative;

(iv)    such other duly executed Security Documents and schedules as required by the Guarantee and Collateral Agreement or applicable foreign law security
agreement (including Intellectual Property security agreements, if applicable), consistent with the forms (if any) delivered on the Closing Date with
respect to

28

the Borrower Representative or otherwise in form and substance reasonably satisfactory to the Lender Representative;

(v)    a customary certificate containing organizational documents, resolutions, a good standing certificate from the state of incorporation of such Subsidiary

and an incumbency certificate, substantially consistent with the certificate delivered pursuant to Clause 3.5.1(i); and

(vi)    customary legal opinions from counsel to the Loan Parties (if customary in the relevant jurisdiction for such opinions to be provided by borrowers’

counsel) with respect to the above clauses (i) through (iv); and

8.1.26        if  any  Loan  Party  shall  acquire  any  Material  Property,  it  shall  promptly  notify  the  Lender  Representative  and,  if  reasonably  requested  by  the  Lender
Representative,  shall  execute  and  deliver  a  customary  mortgage  (together  with  customary  ancillary  documents  and  deliverables)  in  favor  of  the  Lender
Representative within [**] of such request (all such properties that are subject to a mortgage, the “Mortgaged Properties”).

8.2    Negative Undertakings

8.2.1    each Borrower shall not (and shall procure that each Group Company shall not), by one or a series of transactions, whether related or not and whether at one
time or over a period of time, sell, lease, convey, transfer, assign, licence or otherwise dispose of (each, a “Transfer”) any asset (including (but not limited to)
by any form of sale and leaseback, invoice discounting or factoring), in each case other than the following (such following items, “Permitted Transfers”);

(i)    Transfers of inventory, equipment, accounts receivable, notes receivable or other current assets in the ordinary course of business (other than, for the

avoidance of doubt, pursuant to factoring or receivables financing arrangements);

(ii)    the discount without recourse or sale or other disposition or conversion into notes receivable of unpaid and overdue accounts receivable arising in the

ordinary course of business in connection with the compromise, collection or settlement thereof and not part of a financing transaction;

(iii)    Transfers of surplus, damaged, worn out or obsolete equipment that is, in the reasonable judgment of Borrower exercised in good faith, no longer

economically practicable to maintain or useful in the ordinary course of business;

(iv)        the  lease,  assignment,  license,  sublicense  or  sublease  of  any  real  or  personal  property  (other  than  Intellectual  Property)  in  the  ordinary  course  of

business;

(v)    the surrender or waiver of obligations of trade creditors or customers or other contract rights that were incurred in the ordinary course of business,
including  pursuant  to  any  plan  of  reorganization  or  similar  arrangement  upon  the  bankruptcy  or  insolvency  of  any  trade  creditor  or  customer  or
compromise, settlement, release or surrender of a contract, tort or other litigation claim, arbitration or other disputes;

(vi)        Transfers  arising  from  foreclosures,  condemnations,  eminent  domain,  seizure,  nationalization  or  any  similar  action  with  respect  to  assets,  or

dispositions of property subject to Casualty Events;

(vii)    Transfers of property to the extent that (i) such property is exchanged for credit against the purchase price of similar replacement property that is
promptly purchased or (ii) the proceeds of such Transfer are applied to the purchase price of such replacement property (which replacement property
is actually promptly purchased);

(viii)    the unwinding of swap contracts;

(ix)    Transfers that constitute Permitted Security Interests or Permitted Distributions, or that are made pursuant to the terms of any Permitted Agreement

or Permitted Investment;

(x)    Transfers of cash and Cash Equivalents in the ordinary course of business for equivalent value and in a manner that is not prohibited by the terms of

this Loan Agreement or the other Loan Documents;

(xi)    Transfers (A) between or among Loan Parties, (B) between or among Subsidiaries that are not Loan Parties, (C) from a Subsidiary that is not a Loan
Party to a Loan Party, (D) of cash and Cash Equivalents to any MSC, so long as no Default or Event of Default is continuing (provided that such MSC
may only hold such cash or Cash Equivalents in an investment account (which may not be subject to a Security Interest in favor of any other person
(other than Security Interests arising as a matter of law in favor of the financial institution at which such account is located)) and invest such cash
pursuant to the investment policy of the Group) and (E) from a Loan Party to a member of the Group (other than an MSC) that is not a Loan Party;
provided that all such Transfers pursuant to this clause (E) shall not exceed $[**] in the aggregate in any fiscal year;

(xii)    (A) the sale or issuance of equity interests of any Subsidiary of Borrower to any Group Company and (B) the issuance of directors’ qualifying shares

and shares issued to foreign nationals to the extent required by applicable law;

29

(xiii)        any  Transfer,  abandonment,  cancellation,  non-renewal  or  discontinuance  of  use  or  maintenance  of  Intellectual  Property  of  the  Group  that  the
Borrower  Representative  reasonably  determines  in  good  faith  is  (i)  no  longer  useful  to  the  business  of  the  Group,  (ii)  no  longer  economically
practicable to maintain in the ordinary course of business or (ii) is not material to the business of the Group (taken as a whole);

(xiv)    (i) the issuance or sale of any Permitted Convertible Debt by the Borrower Representative, (ii) the sale of any Permitted Warrant Transaction by the
Borrower Representative, (iii) the purchase of any Permitted Bond Hedge Transaction by the Borrower Representative or (iv) the performance by the
Borrower Representative of its obligations under any Permitted Convertible Debt, any Permitted Warrant Transaction or any Permitted Bond Hedge
Transaction; and

(xv)        any  other  Transfer,  provided  that  the  fair  market  value  of  all  property  so  Transferred  pursuant  to  this  clause  (xv)  shall  not  exceed  $[**]  in  the

aggregate in any fiscal year;

8.2.2        each  Borrower  shall  not  (and  shall  ensure  that  no  Group  Company  shall)  incur  or  allow  to  remain  outstanding  any  Financial  Indebtedness,  other  than  the

following (such following items, “Permitted Financial Indebtedness”):

(i)    under this Loan Agreement and the other Loan Documents;

(ii)    Existing Financial Indebtedness;

(iii)    indebtedness pursuant to intercompany arrangements permitted under Clause 8.2.6(xv);

(iv)    non-speculative hedging transactions in connection with protection against interest rate or currency fluctuations and forward purchase contracts, in

each case, entered into in the ordinary course of business;

(v)    arising in the ordinary course of business with suppliers of goods or services with a maximum duration of [**] or that are being contested in good faith;

(vi)    customer deposits and advance payments received in the ordinary course of business from customers for goods purchased in the ordinary course of

business;

(vii)    indebtedness arising as a result of operating leases entered into by any Group Company in the ordinary course of business;

(viii)    the Permitted Agreements (including any milestone payments or similar payments pursuant to the terms thereof);

(ix)        indebtedness  not  to  exceed  $[**]  in  the  aggregate  at  any  time  outstanding,  consisting  of  (i)  indebtedness  incurred  to  finance  the  purchase,  lease,

construction, installation, repair, or improvement of fixed or capital assets and (ii) capital lease obligations;

(x)    indebtedness of with respect to letters of credit entered into in the ordinary course of business in an amount not to exceed $[**] outstanding at any

time;

(xi)        (i)  indebtedness  with  respect  to  workers’  compensation  claims,  payment  obligations  in  connection  with  health,  disability  or  other  types  of  social
security benefits, unemployment or other insurance obligations, reclamation and statutory obligations or (ii) indebtedness related to employee benefit
plans,  including  annual  employee  bonuses,  accrued  wage  increases  and  401(k)  plan  matching  obligations;  in  each  case,  incurred  in  the  ordinary
course of business;

(xii)    indebtedness in respect of performance bonds, bid bonds, appeal bonds, surety bonds and completion guarantees and similar obligations arising in

the ordinary course of business;

(xiii)        indebtedness  in  respect  of  (A)  automated  clearing  house  transactions  and  payment  facilitation  programs  and  (B)  netting  services,  overdraft
protection  and  other  cash  management  services  (including  depository,  credit,  purchasing  or  debit  card,  corporate  credit  cards,  non-card  e-payable
services, electronic funds transfer, treasury management services (including controlled disbursement services, return items and interstate depository
network services), other demand deposit or operating account relationships, foreign exchange facilities, credit card processing services and merchant
services), in each case of clauses (A) and (B), in the ordinary course of business and, in the case of clause (B), not to exceed $[**] in the aggregate
outstanding at any time;

(xiv)    indebtedness consisting of the financing of insurance premiums in the ordinary course of business;

(xv)    indebtedness consisting of guarantees resulting from endorsement of negotiable instruments for collection by any Group Company in the ordinary

course of business;

(xvi)    indebtedness created or arising under any royalty, synthetic royalty or other monetization or similar transaction and in each case incurred solely in

connection with any properties or assets which do not

30

constitute Collateral under the Loan Documents; provided, however, that any such indebtedness is non-recourse to Borrower or any other Loan Party;

(xvii)    indebtedness consisting of (A) indemnities and purchase price adjustments and (B) obligations of a Person to pay an earn-out, milestone payment or
similar contingent or deferred consideration to a counterparty incurred or created in connection with an acquisition, transfer, investment or other sale
or disposition permitted under this Loan Agreement, including, with respect to any purchase price holdback in respect of a portion of the purchase
price of an asset sold to that Person to satisfy unperformed obligations of the seller of such asset, any obligation to pay such seller the excess of such
holdback  over  such  obligations;  provided,  that  any  indebtedness  incurred  under  this  clause  (B)  shall  not,  when  taken  together  with  the  aggregate
outstanding  amount  of  all  other  indebtedness  incurred  under  this  clause  (B)  after  the  Closing  Date  and  prior  to  such  time,  exceed  $[**]  in  the
aggregate unless the Acquisition Consideration Condition is satisfied as of the date such indebtedness is incurred;

(xviii)    Permitted Convertible Debt;

(xix)    other Financial Indebtedness not to exceed $[**] in the aggregate outstanding at any time;

(xx)    guarantees of Permitted Financial Indebtedness incurred pursuant to clauses (i) through (xix) or (xxi); and

(xxi)    extensions, refinancings, modifications, amendments and restatements of Permitted Indebtedness in clauses (i) through (xx) above; provided, that
the principal amount thereof is not increased (other than by any reasonable amount of premium (if any), interest (including post-petition interest),
fees, expenses, charges or additional or contingent interest reasonably incurred in connection with the same and the terms thereof);

8.2.3    each Borrower shall not (and shall ensure that no other Group Company shall) create or permit to subsist any Security Interest over any of its assets, other than

the following (such following items, “Permitted Security Interests”):

(i)    a Security Interest provided to the Lender Representative or any Lender under this Loan Agreement or any other Loan Document;

(ii)    any lien arising by operation of law or regulation (including landlords’, carriers’, warehousemen’s, mechanics’, materialmen’s, contractors’, suppliers of
materials’, architects’ and repairmen’s Liens and other similar Liens), in each case, arising in the ordinary course of business and securing obligations
that are not due and payable or are being contested in good faith;

(iii)        deposits  to  secure  the  performance  of  bids,  trade  contracts  (other  than  for  Indebtedness),  leases  (other  than  capital  lease  obligations),  statutory

obligations, surety and appeal bonds, performance bonds and other obligations of a like nature incurred in the ordinary course of business;

(iv)    Security Interests existing on the date hereof and set forth on Schedule F hereto;

(v)    Security Interests for material taxes, assessments or governmental charges (A) which are not yet [**] past due or payable or (B) which are being contested

in good faith by appropriate proceedings and for which adequate reserves are being maintained to the extent required by GAAP;

(vi)    (A) pledges and deposits made in the ordinary course of business in compliance with workmen’s compensation, payroll taxes, unemployment insurance
and other social security laws or regulations, (B) Security Interests made in the ordinary course of business securing liability for reimbursement or
indemnification  obligations  of  insurance  carriers  providing  property,  casualty  or  liability  insurance  to  the  Borrower  Representative  or  any  of  its
Subsidiaries,  (C)  Security  Interests  to  secure  performance  of  tenders,  bids,  leases,  statutory  or  regulatory  obligations,  surety  and  appeal  bonds,
government contracts, performance and return-of-money bonds and other obligations of like nature, in each case other than for borrowed money and
entered into in the ordinary course of business and (D) Security Interests in favor of customs and revenue authorities arising as a matter of law to
secure payment of customs duties in connection with the importation and exportation of goods in the ordinary course of business;

(vii)    Security Interests (including the right of set-off) of a collection bank arising under Section 4-210 of the Uniform Commercial Code, or any comparable or
successor  provision,  on  items  in  the  course  of  collection,  and  other  Security  Interests  in  favor  of  banks  or  other  financial  institutions  incurred  on
deposits  made  in  accounts  held  at  such  institutions  in  the  ordinary  course  of  business;  provided  that  such  Security  Interests  (A)  are  not  given  in
connection with the incurrence of any Financial Indebtedness, (B) relate solely to obligations for administrative and other banking fees and expenses
incurred  in  the  ordinary  course  of  business  in  connection  with  the  establishment  or  maintenance  of  such  accounts  and  (C)  are  within  the  general
parameters customary in the banking industry;

(viii)    Security Interests arising from attachments or judgments, orders, or decrees in circumstances not constituting an Event of Default;

31

(ix)    Security Interests that are contractual rights of set-off (A) relating to pooled deposit or sweep accounts of Borrower or any of its Subsidiaries to permit
satisfaction of overdraft or similar obligations incurred in the ordinary course of business or (B) relating to purchase orders and other agreements
entered into with customers of Borrower or any of its Subsidiaries in the ordinary course of business;

(x)    Security Interests solely on any cash earnest money deposits made by Borrower or any of its Subsidiaries in connection with any Permitted Acquisition,

Permitted Investment or other acquisition of assets or properties not otherwise prohibited under this Loan Agreement;

(xi)    Security Interests on cash or Cash Equivalents securing obligations under Clause 8.2.2(x);

(xii)        Security  Interests  securing  obligations  under  (A)  Clause  8.2.2(ix),  to  the  extent  such  Security  Interests  extend  only  to  the  assets  and  property  the
acquisition, lease, construction, installation, repair, replacement or improvement of which is financed thereby and any replacements, additions and
accessions thereto and any income or profits thereof; provided, that individual financings provided by a lender may be cross collateralized to other
financings provided by such lender or its affiliates or (B) Clause 8.2.2(iv);

(xiii)    Security Interests on specific items of inventory or other goods and proceeds of any person securing such person’s obligations in respect of bankers’
acceptances  or  letters  of  credit  entered  into  in  the  ordinary  course  of  business  issued  or  created  for  the  account  of  such  person  to  facilitate  the
purchase, shipment or storage of such inventory or other goods, in an amount not to exceed $[**] in the aggregate outstanding at any time;

(xiv)    Security Interests disclosed by the title insurance policies delivered for any Mortgaged Property;

(xv)        servitudes,  easements,  rights-of-way,  restrictions  and  other  similar  encumbrances  on  real  property  imposed  by  law  and  encumbrances  consisting  of
zoning or building restrictions, easements, licenses, restrictions on the use of property or minor defects or other irregularities in title which, in the
aggregate,  are  not  material,  and  which  do  not  in  any  case  materially  detract  from  the  value  of  the  property  subject  thereto  or  interfere  with  the
ordinary conduct of the business of any Borrower or any of its Subsidiaries;

(xvi)        security  given  to  a  public  utility  or  any  municipality  or  governmental  authority  when  required  by  such  utility  or  authority  in  connection  with  the

operations of a Group Company in the ordinary course of business;

(xvii)    to the extent constituting a Security Interest, escrow arrangements securing indemnification obligations associated with any Permitted Acquisition or

Permitted Investment;

(xviii)    Security Interests in favor of any Loan Party;

(xix)        Security  Interests  arising  from,  or  from  Uniform  Commercial  Code  financing  statement  filings  regarding,  operating  leases  or  conditional  sale,  title

retention, consignment or similar arrangements entered into by a Group Company in the ordinary course of business;

(xx)    Permitted Agreements;

(xxi)    judgment and attachment Security Interests not giving rise to an Event of Default pursuant to Clause 9.1.8 and notices of lis pendens and associated

rights related to litigation being contested in good faith by appropriate proceedings and for which adequate reserves have been made;

(xxii)    other Security Interests not to exceed $[**] in the aggregate outstanding at any time; and

(xxiii)    the modification, replacement, extension or renewal of the Security Interests described in clauses (i) through (xxii) above; provided, however, that any
such  modification,  replacement,  extension  or  renewal  must  (A)  be  limited  to  the  assets  or  properties  encumbered  by  the  existing  Security  Interest
(and any additions, accessions, parts, improvements and attachments thereto and the proceeds thereof) and (B) not increase the principal amount of
any Financial Indebtedness secured by the existing Security Interest (other than by any reasonable premium or other reasonable fees and expenses
reasonably incurred in connection therewith).

8.2.4    each Borrower shall not (and shall ensure that no other Group Company shall):

(i)    declare, make or pay any dividend, charge, fee or other distribution (or interest on any unpaid dividend, charge, fee or other distribution) (whether in cash

or in kind) on or in respect of its share capital (or any class of its share capital);

(ii)    repay or distribute any dividend or share premium reserve;

(iii)    pay any management, advisory or other fee to or to the order of any of its shareholders in their capacity as a shareholder; or

32

(iv)    redeem, repurchase, defease, retire or repay any of its share capital or resolve to do so,

without the prior written consent of the Lender Representative, in each case, other than Permitted Distributions.

Notwithstanding the foregoing, and for the avoidance of doubt, this section shall not prohibit (i) the conversion or exchange by holders of (including any cash
payment upon conversion or exchange), or required payment of any principal or premium on (including, for the avoidance of doubt, in respect of a required
repurchase  in  connection  with  the  redemption  of  Permitted  Convertible  Debt  upon  satisfaction  of  a  condition  related  to  the  stock  price  of  the  Borrower
Representative’s  common  stock)  or  required  payment  of  any  interest  with  respect  to,  any  Permitted  Convertible  Debt  in  each  case,  in  accordance  with  the
terms of the indenture governing such Permitted Convertible Debt or (ii) the entry into (including the payment of premiums in connection therewith) or any
required payment with respect to, or required early unwind or settlement of, any warrant relating to the Borrower Representative’s common stock (including,
without limitation, the Warrant Instrument), Permitted Bond Hedge Transaction or Permitted Warrant Transaction, in each case, in accordance with the terms
of the agreement governing such warrant relating to the Borrower Representative’s common stock (including, without limitation, the Warrant Instrument),
Permitted Bond Hedge Transaction or Permitted Warrant Transaction.

Notwithstanding  the  foregoing,  Borrowers  may  repurchase,  exchange  or  induce  the  conversion  of  Permitted  Convertible  Debt  by  delivery  of  shares  of  the
Borrower  Representative’s  common  stock  and/or  a  different  series  of  Permitted  Convertible  Debt;  provided  that,  for  the  avoidance  of  doubt,  substantially
concurrently  with,  or  a  commercially  reasonable  period  of  time  before  or  after,  the  related  settlement  date  for  the  Permitted  Convertible  Debt  that  are  so
repurchased, exchanged or converted, Borrowers may exercise or unwind or terminate early (whether in cash, shares or any combination thereof) the portion
of  the  Permitted  Bond  Hedge  Transactions  and  Permitted  Warrant  Transactions,  if  any,  corresponding  to  such  Permitted  Convertible  Debt  that  is  so
repurchased, exchanged or converted;

8.2.5    each Borrower shall not (and shall procure that no other Group Company shall), enter into any amalgamation, demerger, merger or corporate reconstruction;

provided that:

(i)    any Loan Party may merge, amalgamate or consolidate with (A) a Borrower, so long as such Borrower is the surviving entity or (B) any other Loan Party

(other than a Borrower);

(ii)    any Group Company that is not a Loan Party may merge, amalgamate or consolidate with (i) any Loan Party, so long as such Loan Party is the surviving

entity or (ii) any other Group Company that is not a Loan Party;

(iii)    any Group Company may liquidate or dissolve or change its legal form; provided that if such Group Company is a Loan Party, either (A) the validity,
perfection and priority of the Security Interests securing the Loan Facility are not adversely affected thereby or (B) such Loan Party shall at or before
the time of such liquidation or dissolution transfer its assets to another Loan Party; and

(iv)    any Group Company may enter into any amalgamation, demerger, merger or corporate reconstruction in order to effect a Permitted Transfer, Permitted

Acquisition or other Permitted Investment;

8.2.6        each  Borrower  shall  not  (and  shall  procure  that  each  Group  Company  shall  not)  (A)  acquire  any  assets  or  equipment,  other  than  in  the  normal  course  of
business and upon an arm’s length basis, (B) acquire any equity interests of any third party, or any business unit or division of any third party, (C) invest in or
acquire  any  shares,  stocks,  securities  or  other  interest  in  any  Joint  Venture  or  transfer  any  assets  or  lend  to  or  guarantee  or  give  an  indemnity  for  or  give
security for the obligations of a Joint Venture or maintain the solvency of or provide working capital to any Joint Venture (or agree to do any of the foregoing),
or (D) be a creditor in respect of any Financial Indebtedness, in each case, other than the following (such items, “Permitted Investments”):

(i)    investments in Subsidiaries existing on the date hereof;

(ii)    investments shown on Schedule E;

(iii)    investments consisting of cash and Cash Equivalents;

(iv)    investments consisting of the endorsement of negotiable instruments for deposit or collection or similar transactions in the ordinary course of business;

(v)    guarantees of operating leases or of other obligations that do not constitute Financial Indebtedness, in each case, entered into in the ordinary course of

business;

(vi)        non-cash  Investments  made  in  connection  with  reorganization  activities  otherwise  permitted  under  this  Loan  Agreement  or  in  connection  with  tax

planning;

(vii)    investments that constitute Permitted Security Interests, Permitted Transfers or Permitted Distributions, or that are made in accordance with the terms

of Permitted Agreements or Permitted Financial Indebtedness (including guarantees of Permitted Financial Indebtedness);

(viii)        investments  consisting  of  (A)  non  cash  loans  to  employees,  officers  or  directors  relating  to  the  purchase  of  equity  securities  of  the  Borrower
Representative  pursuant  to  employee  stock  purchase  plans,  or  agreements  approved  by  Borrower’s  Board  of  Directors,  (B)  advances  or  other
investments to employees,

33

officers or directors to cover tax obligations in connection with the vesting of restricted stock issued to such employee, officer or director, (C) travel
advances and employee relocation loans and other employee advances in the ordinary course of business in an amount not to exceed $[**] at any time
outstanding, and (D) other loans to employees, officers or directors of any Group Company in an amount not to exceed, in the case of this clause (D),
$[**] in the aggregate at any time outstanding;

(ix)    investments (including debt obligations) received in connection with the bankruptcy or reorganization of customers or suppliers and in settlement of

delinquent obligations of, and other disputes with, customers or suppliers arising in the ordinary course of business;

(x)        investments  consisting  of  notes  receivable  of,  or  prepaid  royalties  and  other  credit  extensions,  to  customers,  distributors,  suppliers,  licensors  and

licensees who are not Affiliates, in the ordinary course of business;

(xi)    Permitted Acquisitions;

(xii)    other investments consisting of (A) the formation of any Subsidiary for the purpose of effectuating a Permitted Acquisition, the capitalization of such
Subsidiary  whether  by  capital  contribution  or  intercompany  loans,  in  each  case,  to  the  extent  otherwise  permitted  by  the  terms  of  this  Loan
Agreement, related investments in Subsidiaries necessary to consummate such Permitted Acquisition, and the receipt of any non-cash consideration
in a Permitted Acquisition, and (B) earnest money deposits required in connection with a Permitted Acquisition or other acquisition of properties or
assets not otherwise prohibited hereunder;

(xiii)    investments of any person that (A) becomes a Subsidiary after the date hereof, or (B) are assumed after the date hereof by any Subsidiary in connection

with an acquisition of assets from such Person, in either case, in a Permitted Acquisition;

(xiv)    investments constituting the licensing of Intellectual Property expressly permitted under this Loan Agreement;

(xv)    investments by (i) any Loan Party in any other Loan Party, (ii) any Subsidiary which is not a Loan Party in any other Subsidiary which is not a Loan
Party, (iii) any Subsidiary which is not a Loan Party in any Loan Party, (iv) any Loan Party in a Subsidiary which is not a Loan Party, in an amount not
to exceed $[**] per fiscal year and (v) any Group Company in any MSC so long as no Default or Event of Default is continuing;

(xvi)        investments  in  connection  with,  and  the  performance  of  obligations  under  (including,  for  the  avoidance  of  doubt,  the  entry  into,  payments  of  any
premium  with  respect  to,  and  the  settlement  of)  any  Permitted  Bond  Hedge  Transactions  and  Permitted  Warrant  Transactions,  in  each  case  in
accordance with its terms; and

(xvii)    other investments not to exceed $[**] in the aggregate per fiscal year;

8.2.7    notwithstanding any other provision of this Loan Agreement, each Borrower shall not request any Loan, and each Borrower shall not use, and shall ensure that
no Group Company, its or their respective directors, officers, employees, agents and representatives shall use, the proceeds of any Loan, directly or knowingly
indirectly, (i) in furtherance of an offer, payment, promise to pay, or authorization of the payment or giving of money, or anything else of value, to any person
in  violation  of  any  applicable  Anti-Corruption  Laws,  Anti-Money  Laundering  Laws  or  Sanctions,  (ii)  to  fund,  finance  or  facilitate  any  activities,  business  or
transaction of or with any Sanctioned Person or in any Designated Jurisdiction, or (iii) in any other manner that would result in the violation by any party of
any applicable Sanctions, Anti-Corruption Laws or Anti Money Laundering Laws;

8.2.8    each Borrower shall procure that no substantial change is made to the general nature of the business of the Borrower Representative or the Group from that
carried on at the date of this Loan Agreement (or any business reasonably related, complementary, synergistic or ancillary thereto or reasonable extensions
thereof);

8.2.9    each Borrower shall not (and shall procure that each Group Company shall not) make any distribution, whether in cash, property, securities or a combination
thereof, other than regular scheduled payments of interest as and when due (to the extent not prohibited by any applicable subordination provisions) in respect
of, or pay, or commit to pay, or directly or indirectly redeem, repurchase, retire or otherwise acquire for consideration, or set apart any sum for the aforesaid
purposes, any Financial Indebtedness with an individual outstanding principal amount in excess of $[**] that is contractually subordinated to the Loan Facility
(“Junior Debt”), or pay in cash any amount in respect of any Junior Debt that may at the obligor’s option be paid in kind or in other securities, in each case
other than (i) under intercompany loans permitted to be incurred pursuant to this Loan Agreement, (ii) pursuant to the terms of any Permitted Agreement or
(iii) refinancings of Permitted Financial Indebtedness to the extent such refinancing is permitted pursuant to Clause 8.2.2;

8.2.10    each Borrower shall not (and shall procure that each Group Company shall not) enter into, incur or permit to exist any agreement or other arrangement that
prohibits, restricts or imposes any condition upon (A) the ability of any Borrower or any Loan Party to create, incur or permit to exist any Security Interest
upon any of its property or assets, or (B) the ability of any Subsidiary to pay dividends or other distributions with respect to any of its equity interests or to
make or repay loans or advances to any Borrower or any other Subsidiary or to guarantee Financial Indebtedness of any Borrower or any other Subsidiary;
provided that the foregoing shall not apply to:

34

(i)    restrictions in agreements listed on Schedules D, E, F or G;

(ii)    restrictions contained in the [**] or the [**];

(iii)    restrictions and conditions imposed by law, rule, regulation or order;

(iv)    restrictions and conditions imposed by any Loan Document;

(v)        customary  restrictions  and  conditions  contained  in  agreements  relating  to  the  sale  of  a  Subsidiary  or  any  assets  pending  such  sale,  provided  such
restrictions and conditions apply only to the Subsidiary that is to be sold (or, in the case of an asset sale, only to the assets being sold) and such sale is
permitted hereunder;

(vi)        restrictions  or  conditions  imposed  by  any  agreement  relating  to  Permitted  Agreements  or  secured  Financial  Indebtedness  permitted  by  this  Loan
Agreement if such restrictions or conditions apply only to the property or assets that are the subject of such Permitted Agreement or that secures such
Indebtedness;

(vii)    solely in the case of clause (A) above, customary provisions in leases, subleases, licenses, sublicenses and other contracts;

(viii)    customary provisions in leases, licenses and other contracts restricting assignment; and

(ix)    any restriction contained in agreements covering Permitted Financial Indebtedness; provided that (i) such restrictions contained will not materially affect
the Borrowers’ ability to make anticipated principal or interest payments under this Loan Agreement (as determined by the Borrower Representative
in good faith) or (ii) such restrictions taken as a whole are not materially less favorable to the Borrowers than the restrictions contained in this Loan
Agreement and do not materially and adversely impair the Lender’s rights and remedies under this Loan Agreement (as determined by the Borrower
Representative in good faith);

8.2.11    each Borrower shall not (and shall procure that each Group Company shall not) permit any waiver, supplement, modification, amendment, termination or
release of (i) its certificate of incorporation, by-laws, operating, management or partnership agreement or other organizational documents or (ii) the [**] or the
[**], in each case, that, taken as a whole, is materially adverse to the interests of the Lender in its capacity as such, other than pursuant to a transaction or
action permitted by this Loan Agreement;

8.2.12    the Borrower Representative shall not change its fiscal year-end to a date other than December 31;

8.2.13    notwithstanding anything in this Loan Agreement to the contrary, the Borrower Representative and its Subsidiaries are permitted to enter into, maintain and
perform their respective obligations under, the following agreements: (i) the [**], (ii) the [**], (iii) any agreement providing for the sale, financing or other
monetization on commercially reasonable terms of non-U.S. royalties or milestones from the Borrowers’ proprietary products, vadadustat and Auryxia®, (iv)
any agreements providing for the sale, financing or other monetization on commercially reasonable terms of U.S. royalties from vadadustat, subject to (x) a cap
of  [**]%  royalty  on  net  sales  and  (y)  $[**]  of  total  payments  under  any  such  outstanding  agreements  under  this  clause  (iv)  (other  than  any  deferred
compensation,  milestone  payments  or  similar  arrangements)  (clauses  (i)  through  (iv),  together  with  all  documents  related  thereto,  collectively,  the
“Permitted  Royalty  Agreements”)  and  (v)  any  Permitted  License  (together  with  the  Permitted  Royalty  Agreements,  collectively,  “Permitted
Agreements”);

8.2.14    notwithstanding anything in this Loan Agreement to the contrary, the Borrower Representative and its Subsidiaries are permitted to complete Capital Raise

transactions and maintain and perform their respective obligations under any agreements related thereto; and

8.2.15    each Borrower shall:

(i)        not  permit  any  MSC  to  engage  in  any  business  activities  or  have  any  assets  or  liabilities  other  than  its  ownership  of  cash  and  Cash  Equivalents  and

liabilities incidental thereto;

(ii)    not permit any assets owned or held by any MSC or any equity interests issued by any MSC to be subject to any Security Interest (other than Security

Interests arising as a matter of law in favor of the financial institution at which any account of an MSC is located); and

(iii)    during the continuance of an Event of Default, cause each MSC to, at the option of the Lender Representative, transfer all cash and Cash Equivalents held
by such MSC to an account subject to a control agreement in favor of the Lender Representative within [**] of receipt by the Borrower Representative
of a written request therefor by the Lender Representative.

8.3    Financial Covenant

8.3.1    The Borrower Representative shall ensure that, as of the last day of each fiscal month (commencing with the month ended February 29, 2024), either:

35

(i)    Liquidity is greater than or equal to $15,000,000; or

(ii)    the consolidated revenue of the Group is greater than or equal to $150,000,000 for the 12-month period ending on such applicable test date.

For the avoidance of doubt, only one of the two covenants contained in clauses (i) and (ii) is required to be satisfied, and if the Borrower shall be in compliance with
one such covenant but not the other, that shall not constitute a Default or Event of Default.

9.    EVENTS OF DEFAULT

9.1    An Event of Default occurs if:

9.1.1    [reserved];

9.1.2    any Group Company fails to pay (i) any principal sum payable under any Loan Document or under any document relating to the Loan Documents when due and payable
(or, if failure to pay is the result of an administrative error or technical problem, within [**] after the due date therefor), (ii) any interest payment payable under any
Loan Document within [**] after the due date therefor or (iii) any other amount payable under any Loan Document within [**] after the due date therefor; provided
that, in each case, if there has been a material disruption to those payment or communications systems or to those financial markets which are, in each case, required
to operate in order for payments to be made in connection with this Loan Agreement and which disruption is not caused by, and is beyond the control of, any of the
parties, failure to make such payment shall not result in an Event of Default so long as such payment is made within [**] after its due date;

9.1.3    any Group Company (as relevant) fails to perform any undertaking contained in Clause 8.1.3 (solely with respect to the Borrower), 8.2 or 8.3;

9.1.4    any Group Company (as relevant) fails to perform any undertaking (other than those described in Clause 9.1.2 or 9.1.3) contained in any Loan Document and such failure
continues for [**] after the earlier of the date on which (i) a Financial Officer of any Group Company becomes aware of such failure and (ii) written notice thereof shall
have  been  given  to  the  Borrower  Representative  by  the  Lender  Representative,  unless  the  Lender  Representative  (at  its  sole  discretion)  notifies  the  Borrower
Representative in writing that it is satisfied that the breach has not put any of the security for the Loan immediately at risk and that it considers that the breach is
capable of remedy;

9.1.5    any representation, warranty or statement of fact made by, or by an officer of, any Group Company in any Loan Document or in the Drawdown Notice or any other notice

or document relating to any Loan Document is incorrect, untrue or misleading in any material respect when it is made or deemed repeated;

9.1.6    (i) any principal or interest, regardless of amount, due in respect of any Material Financial Indebtedness is not paid when due (after the expiration of any grace periods
therefor),  (ii)  any  commitment  for  any  Material  Financial  Indebtedness  is  cancelled  by  a  creditor  of  any  Group  Company  (other  than  at  maturity  or  the  stated
expiration of such commitment, or any cancellation that is at the request of a Group Company), (iii) any Security Interest over any of the assets of any Group Company
securing  any  Material  Financial  Indebtedness  is  enforced  by  the  creditor  thereof,  or  (iv)  any  other  event  or  condition  occurs  that  results  in  any  Material  Financial
Indebtedness becoming due prior to its scheduled maturity or that enables or permits (with or without the giving of notice, but after the expiration of any grace periods
therefor) the holder or holders of any Material Financial Indebtedness or any trustee or agent on its or their behalf to accelerate any Material Financial Indebtedness
prior to its scheduled maturity; provided that this clause 9.1.6 shall not apply (a) to Financial Indebtedness that becomes due as a result of the sale or transfer or other
disposition  (including  a  Casualty  Event)  of  property  or  assets  and  such  Financial  Indebtedness  is  repaid  when  required  under  the  documents  providing  for  such
Indebtedness,  (b)  to  events  of  default,  termination  events  or  any  other  similar  event  under  the  documents  governing  swap  contracts  for  so  long  as  such  event  of
default, termination event or other similar event does not result in the occurrence of an early termination date or any acceleration or prepayment of any amounts or
other Financial Indebtedness payable thereunder or (c) if the relevant breach under such Financial Indebtedness is remedied or validly waived by the creditors of such
Financial Indebtedness prior to any acceleration of the Loans under this Loan Agreement pursuant to Clause 9.2; provided further, that this Clause 9.1.6 shall not
apply to (x) any redemption, exchange, repurchase, conversion or settlement with respect to any Permitted Convertible Debt, or satisfaction of any condition giving
rise to or permitting the foregoing, pursuant to their terms unless (i) such redemption, exchange, repurchase, conversion or settlement results from a default or event
of  default  thereunder  or  an  event  of  the  type  that  constitutes  an  Event  of  Default,  (ii)  there  is  a  failure  to  consummate  such  redemption,  exchange,  repurchase,
conversion  or  settlement  resulting  in  a  default  or  event  of  default  thereunder  or  an  event  of  the  type  that  constitutes  an  Event  of  Default  or  (iii)  such  redemption
exchange,  repurchase,  conversion  or  settlement  is  not  permitted  under  the  Loan  Documents,  or  (y)  early  payment  requirement  or  unwinding  or  termination  with
respect  to  any  Permitted  Bond  Hedge  Transaction  or  Permitted  Warrant  Transaction,  or  satisfaction  of  any  condition  giving  rise  to  or  permitting  the  foregoing,  in
accordance with the terms thereof, so long as, in any such case, the Borrower Representative is not the “defaulting party” (or substantially equivalent term) under the
terms of such Permitted Bond Hedge Transaction or Permitted Warrant Transaction, as applicable;

9.1.7    

(i)    an involuntary proceeding shall be commenced or an involuntary petition shall be filed in a court of competent jurisdiction seeking (i) relief in respect of the
Borrower Representative or any Subsidiary, or of a substantial part of the property or assets of the Borrower Representative or a Subsidiary, under Title 11 of
the  United  States  Code,  as  now  constituted  or  hereafter  amended,  or  any  other  Federal,  state,  provincial,  territorial  or  foreign  bankruptcy,  insolvency,
receivership or similar law, (ii) the appointment of a receiver, interim receiver, receiver and manager, administrator, examiner, monitor, trustee, custodian,
sequestrator,  conservator  or  similar  official  for  the  Borrower  Representative  or  any  Subsidiary)  or  for  a  substantial  part  of  the  property  or  assets  of  the
Borrower Representative

36

or  a  Subsidiary  or  (iii)  the  winding-up  or  liquidation  of  the  Borrower  Representative  or  any  Subsidiary  and,  in  each  case,  such  proceeding  or  petition  shall
continue undismissed or unstayed for [**], or an order or decree approving or ordering any of the foregoing shall be entered; or

(ii)    the Borrower Representative or any Subsidiary shall (i) voluntarily commence any proceeding or file any petition seeking relief under Title 11 of the United States
Code, as now constituted or hereafter amended, or any other Federal, state, provincial, territorial or foreign bankruptcy, insolvency, receivership or similar law,
(ii) consent to the institution of, or fail to contest in a timely and appropriate manner, any proceeding or the filing of any petition described in clause (i) above,
(iii)  apply  for  or  consent  to  the  appointment  of  a  receiver,  interim  receiver,  receiver  and  manager,  administrator,  examiner,  monitor,  trustee,  custodian,
sequestrator,  conservator  or  similar  official  for  the  Borrower  Representative  or  such  Subsidiary  or  for  a  substantial  part  of  the  property  or  assets  of  the
Borrower Representative or such Subsidiary, or (iv) make a general assignment for the benefit of creditors;

9.1.8    any final judgment or order of a court, arbitral body or agency for the payment of money is made in relation to the Loan Documents or the transactions contemplated by
the Loan Documents or against any member of the Group or its assets which have, or has, or are, or would reasonably be likely to have a Material Adverse Change
(solely to the extent not covered by independent third-party insurance or indemnification as to which the insurer or indemnitor has been notified of such judgement,
order or award and has affirmed coverage thereof in writing);

9.1.9    there is a Change of Control in any Group Company; for purposes of this Clause 9.1.9, a "Change of Control" shall mean any of the following events (whether in one or in a
series of related transactions): (A) the sale of all or substantially all the assets of the Group to any person other than a Group Company or (B) a person or “group”
(within the meaning of Rule 13d-5 under the U.S. Securities Exchange Act of 1934, as in effect on the date hereof, but excluding any employee benefit plan of such
person and its subsidiaries and any person or entity acting in its capacity as trustee, agent or other fiduciary or administrator of any such plan), acquires beneficial
ownership of more than [**]% of the voting stock of the Borrower Representative (determined on a fully diluted basis); provided that the Lender Representative may
agree, by written notice to the Borrower Representative, that a Change of Control shall not be deemed an Event of Default, but that nevertheless the consequences set
forth in Clause 9.2.1 and 9.2.2 shall apply, and in such event the Loan, all accrued interest and all other amounts accrued, owing or payable under the Loan Documents
shall be due and payable simultaneously with the closing of the Change of Control transaction;

9.1.10    (i) Any material provision of the Loan Documents proves to have been or becomes invalid or unenforceable other than as permitted under the Loan Documents, (ii)
subject to the Perfection Exceptions, a Security Interest created by the Security Documents over any material portion of the Collateral ceases to be a valid, perfected,
first priority Security Interest in the Collateral covered thereby, other than as expressly permitted under the Loan Documents or (iii) the Borrower Representative or
any other Loan Party repudiates or rescinds a Loan Document or purports in writing to repudiate or rescind a Loan Document (other than in connection with the end
or  termination  of  the  Security  Period),  except,  in  each  case,  as  a  result  of  the  failure  of  the  Lender  or  the  Lender  Representative  to  (x)  maintain  possession  of
certificates  actually  delivered  to  it  representing  securities  pledged  under  the  Loan  Documents,  (y)  maintain  possession  of  instruments  actually  delivered  to  it
representing indebtedness pledged under the Loan Documents or (z) file UCC continuation statements or amendments;

9.1.11    any guaranty under the Security Documents for any reason shall cease to be in full force and effect (other than in accordance with its terms or as otherwise permitted
under  the  Loan  Documents)  or  any  guarantor  shall  deny  in  writing  that  it  has  any  further  liability  under  the  Security  Documents  (other  than  as  a  result  of  the
discharge of such guarantor in accordance with the terms of the Loan Documents);

9.1.12    a Material Adverse Change occurs; or

9.1.13        an  ERISA  Event  or  a  Foreign  Benefit  Event  shall  have  occurred  that,  when  taken  together  with  all  other  such  ERISA  Events  and  Foreign  Benefit  Events,  would

reasonably be expected to result in liability of any Borrower in an aggregate amount that would result in a Material Adverse Change.

9.2    Lender's Rights

At any time during the continuance of any Event of Default, the Lender Representative may:

9.2.1    serve on the Borrower Representative a notice stating that all obligations of the Lender to the Borrower Representative under this Loan Agreement including (without

limitation) the obligation to advance the Loan (or any part thereof) are terminated;

9.2.2        serve  on  the  Borrower  Representative  a  notice  stating  that,  the  Loan,  all  interest  and  all  other  amounts  accrued,  owing  or  payable  under  the  Loan  Documents  are

immediately due and payable;

9.2.3    serve on the Borrower Representative a notice stating that, the Loan, all interest and all other amounts accrued, owing or payable under the Loan Documents are due and

payable on demand;

9.2.4    declare the Security Documents to be enforceable; and/or

9.2.5    take any other action which, as a result of the Event of Default or any notice served under Clauses 9.2.1 or 9.2.2 above, the Lender is entitled to take under the Security

Documents or any applicable law.

37

9.3    End of Lender’s Obligations. At the time of service of a notice under Clause 9.2.1 and/or Clause 9.2.2, all the obligations of the Lender to the Borrower Representative

to extend new Loans under this Loan Agreement shall terminate.

9.4    Acceleration

(a)  Other  than  with  respect  to  any  Event  of  Default  occurring  under  Clause  9.1.7,  on  the  service  of  a  notice  under  Clause  9.2.2  the  following  sums  shall  become
immediately due and payable and (b) with respect to any Event of Default occurring under 9.1.7, the following sums shall automatically become immediately due and
payable, in each case without presentment, demand, protest or any other notice of any kind, all of which are hereby expressly waived by the Borrower Representative
and each other Group Company:

9.4.1    the outstanding principal amount of the Loan;

9.4.2    all accrued and unpaid interest;

9.4.3    all unpaid End of Loan Payments;

9.4.4    all unpaid fees, costs and expenses; and

9.4.5    all other outstanding sums payable by the Borrowers to the Lender under the Loan Documents.

9.5    Waiver of Event of Default

The Lender Representative, at its sole and absolute discretion, may waive any Default or Event of Default hereunder, prior to or after the event or events giving rise
thereto, provided that such waiver may be effected only by written notice provided by the Lender Representative to the Borrower Representative to that effect (and
subject  further  to  Clause  15.3  below);  it  being  understood  and  acknowledged,  that  if  and  so  long  as  no  notice  of  waiver  of  a  Default  or  an  Event  of  Default  was  so
provided, such Default or Event of Default shall be deemed as having occurred and in effect for all purposes hereunder (subject to the Borrower Representative’s right
to remedy or cure a Default).

10.    FEES, EXPENSES AND TAXES

10.1    Transaction Fee

The Transaction Fee shall be paid by the Borrower Representative to the Lender Representative upon the date of this Loan Agreement, or with respect to the portion
thereof that is not payable on the date of this Loan Agreement in respect of Tranche B and Tranche C, on the earliest to occur of (i) the date Tranche B or Tranche C, as
appliable, is first funded, (ii) the date that the commitments in respect of Tranche B or Tranche C, as applicable, are terminated or cancelled and (iii) the date on which
the availability period of Tranche B or Tranche C, as applicable, terminates (in each case in accordance with the Loan Facility Terms).

10.2    End of Loan Payments

The End of Loan Payment shall accrue on the amount of each Tranche and shall be payable in respect of each Tranche on the earlier of: (i) the date on which the Loan
is prepaid in full or otherwise falls due for repayment in full (whether at maturity or by acceleration); and (ii) the date on which the final payment by the Borrowers in
respect of the relevant Tranche is due for payment (whether at maturity or by acceleration).

10.3    Documentary Costs

10.3.1        The  Borrowers  shall  promptly  pay  to  the  Lender  Representative  within  [**]  of  the  Lender  Representative's  written  demand  (accompanied  by  a  reasonably  detailed
invoice), the reasonable and documented out-of-pocket expenses (including reasonable and documented out-of-pocket legal expenses of one external counsel and one
local counsel for each applicable jurisdiction) incurred by the Lender in connection with:

(i)    the negotiation, execution, preparation and perfection of the Loan Documents entered into on or around the date of this Loan Agreement and the transactions

contemplated hereby and thereby;

(ii)    the negotiation, execution, preparation and perfection of Security Documents after the date of this Loan Agreement and the transactions contemplated thereby;

(iii)    any amendment or supplement to the Loan Documents, or any proposal for such an amendment to be made; and

(iv)        any  consent  or  waiver  by  the  Lender  concerned  under  or  in  connection  with  the  Loan  Documents  or  any  request  by  the  Borrower  Representative  for  such  a

consent or waiver.

10.3.2    The Borrowers shall promptly pay to the Lender Representative within [**] of the Lender Representative's written demand (together with a reasonably detailed invoice),
the  reasonable  and  documented  out-of-pocket  expenses  (including  reasonable  and  documented  out-of-pocket  legal  expenses  of  one  external  counsel  and  one  local
counsel for each applicable

38

jurisdiction) incurred by the Lender in connection with any step taken by the Lender with a view to the protection or enforcement of any right or Security Interest
created by the Loan Documents.

10.4    Certain Taxes and Duties

10.4.1    [Reserved].

10.4.2    Where any Borrower is required by the Loan Documents to pay, reimburse or indemnify the Lender for any cost or expense, each Borrower, at the same time as it pays,
reimburses or indemnifies (as the case may be) the Lender for such cost or expense, shall also pay, reimburse or indemnify such part thereof as represents VAT, save to
the extent that the Lender reasonably determines that it is entitled to a credit or repayment in respect of such VAT from the relevant Tax authority.

10.4.3     All amounts expressed to be payable under a Loan Document by any Borrower to the Lender which (in whole or in part) constitute the consideration for any supply for
VAT purposes are deemed to be exclusive of any VAT which is chargeable on that supply, and accordingly, if VAT is or becomes chargeable on any supply made by the
Lender to a Borrower under a Loan Document and the Lender is required to account to the relevant tax authority for the VAT, such Borrower must pay to the Lender
(in addition to and at the same time as paying any other consideration for such supply) an amount equal to the amount of the VAT (subject to the Lender providing a
valid VAT invoice to such Borrower).

10.4.4         In  relation  to  any  supply  made  by  the  Lender  to  the  Borrower  under  a  Loan  Document,  if  reasonably  requested  by  the  Lender  Representative,  the  Borrower  must
promptly provide the Lender Representative with details of the Borrower’s VAT registration and such other information as is reasonably requested in connection with
the Lender’s VAT reporting requirements in relation to such supply.

10.4.5     Any reference in Clauses 10.4.2, 10.4.3, and 10.4.5 to any Party shall, at any time when such Party is treated as a member of a group for VAT purposes, include (where
appropriate and unless the context otherwise requires) a reference to the representative member of such group at such time (the term "representative member" to have
the same meaning as in the United Kingdom Value Added Tax Act 1994 and shall include any similar or equivalent term in any other jurisdiction).

10.5    Liability for Taxes

10.5.1    Each Borrower shall make all payments to be made by it without any Tax deduction, unless a Tax deduction is required by law. Each Borrower shall promptly upon
becoming aware that it must make a Tax deduction (or that there is any change in the rate or the basis of a Tax deduction) notify the Lender Representative.

10.5.2    If any Borrower is required to make any Tax deduction by law from any payment due under the Loan Documents, such Borrower shall be entitled to make such Tax
deduction, and, if such Tax is an Indemnified Tax, the payment due from such Borrower shall be increased to an amount which (after making such Tax deduction,
including such Tax deduction applicable to additional sums payable under this Clause 10.5) leaves an amount equal to the amount which would have been due for
payment if no Tax deduction had been required.

10.5.3        The  Borrowers  shall  timely  pay  to  the  relevant  Governmental  Authority  in  accordance  with  applicable  law,  or  at  the  option  of  the  Lender  Representative  timely

reimburse it for the payment of, any Other Taxes.

10.5.4    The Borrowers shall indemnify each Lender, within [**] after demand therefor, for the full amount of any Indemnified Taxes (including Indemnified Taxes imposed or
asserted on or attributable to amounts payable under this Clause 10.5) payable or paid by such Lender or required to be withheld or deducted from a payment to such
Lender and any reasonable expenses arising therefrom or with respect thereto, whether or not such Indemnified Taxes were correctly or legally imposed or asserted by
the  relevant  Governmental  Authority.  A  certificate  as  to  the  amount  of  such  payment  or  liability  delivered  to  the  Borrower  Representative  by  the  Lender
Representative shall be conclusive absent manifest error.

10.5.5    If any Borrower is required to make a Tax deduction, such Borrower shall make that Tax deduction and any payment required in connection with that Tax deduction

within the time allowed and in the minimum amount required by law.

10.5.6    Within [**] of making either a Tax deduction or any payment required in connection with that Tax deduction, the Borrower Representative shall deliver to the Lender
Representative  evidence  reasonably  satisfactory  to  it  that  the  Tax  deduction  has  been  made  or  (as  applicable)  any  appropriate  payment  paid  to  the  relevant  taxing
authority.

10.5.7        Each  Lender  shall  deliver  to  the  Borrower  Representative,  at  the  time  or  times  reasonably  requested  by  the  Borrower  Representative,  such  properly  completed  and
executed documentation reasonably requested by the Borrower Representative as will permit such payments to be made without withholding or at a reduced rate of
withholding. In addition, each Lender, if reasonably requested by the Borrower Representative, shall deliver such other documentation prescribed by applicable law or
reasonably  requested  by  the  Borrower  Representative  as  will  enable  the  Borrowers  to  determine  whether  or  not  such  Lender  is  subject  to  backup  withholding  or
information  reporting  requirements.  Notwithstanding  anything  to  the  contrary  in  the  preceding  two  sentences,  the  completion,  execution  and  submission  of  such
documentation (other than such documentation set forth in Clause 10.5.7(i), Clause 10.5.7(ii) and Clause 10.5.7(iv)) shall not be required if in the Lender’s reasonable
judgment such completion, execution or submission would subject such Lender to any material unreimbursed cost or expense or would materially prejudice the legal
or commercial position of such Lender.

Without limiting the generality of the foregoing,

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(i)        if  a  Lender  is  a  U.S.  Person,  it  shall  deliver  to  the  Borrower  Representative  on  or  prior  to  the  date  on  which  such  Lender  becomes  a  Lender  under  this  Loan
Agreement (and from time to time thereafter upon the reasonable request of the Borrower Representative), executed copies of IRS Form W-9 certifying that
such Lender is exempt from U.S. federal backup withholding tax;

(ii)    if a Lender is not a U.S. Person, to the extent it is legally entitled to do so, it shall deliver to the Borrower Representative (in such number of copies as shall be
requested by the Borrower Representative) on or prior to the date on which such Lender becomes a Lender under this Loan Agreement (and from time to time
thereafter upon the reasonable request of the Borrower Representative), whichever of the following is applicable: (1) if such Lender is claiming the benefits of
an income tax treaty to which the United States is a party (x) with respect to payments of interest under any Loan Document, executed copies of IRS Form W-
8BEN  or  IRS  Form  W-8BEN-E  establishing  an  exemption  from,  or  reduction  of,  U.S.  federal  withholding  Tax  pursuant  to  the  “interest”  article  of  such  tax
treaty  and  (y)  with  respect  to  any  other  applicable  payments  under  any  Loan  Document,  IRS  Form  W-8BEN  or  IRS  Form  W-8BEN-E  establishing  an
exemption  from,  or  reduction  of,  U.S.  federal  withholding  Tax  pursuant  to  the  “business  profits”  or  “other  income”  article  of  such  tax  treaty;  (2)  executed
copies of IRS Form W-8ECI; (3) if such Lender is claiming the benefits of the exemption for portfolio interest under Section 881(c) of the Code, (x) a certificate
substantially in the form of Exhibit A-1 to the effect that such Lender is not a “bank” within the meaning of Section 881(c)(3)(A) of the Code, a “10 percent
shareholder”  of  any  Borrower  within  the  meaning  of  Section  871(h)(3)(B)  of  the  Code,  or  a  “controlled  foreign  corporation”  related  to  any  Borrower  as
described in Section 881(c)(3)(C) of the Code (a “U.S. Tax Compliance Certificate”) and (y) executed copies of IRS Form W-8BEN or IRS Form W-8BEN-
E; or (4) if the Lender is not the beneficial owner, executed copies of IRS Form W-8IMY, accompanied by IRS Form W-8ECI, IRS Form W-8BEN, IRS Form
W-8BEN-E, a U.S. Tax Compliance Certificate substantially in the form of Exhibit A-2 or Exhibit A-3, IRS Form W-9, or other certification documents from
each beneficial owner, as applicable; provided that if such Lender is a partnership and one or more direct or indirect partners of the Lender are claiming the
portfolio interest exemption, such Lender may provide a U.S. Tax Certificate substantially in the form of Exhibit A-4 on behalf of each such direct and indirect
partner;

(iii)    if a Lender is not a U.S. Person, to the extent it is legally entitled to do so, deliver to the Borrower Representative (in such number of copies as shall be requested
by the Borrower Representative) on or prior to the date on which such Lender becomes a Lender under this Loan Agreement (and from time to time thereafter
upon the reasonable request of the Borrower Representative), executed copies of any other form prescribed by applicable law as a basis for claiming exemption
from or a reduction in U.S. federal withholding Tax, duly completed, together with such supplementary documentation as may be prescribed by applicable law
to permit the Borrowers to determine the withholding or deduction required to be made; and

(iv)    if a payment made to any Lender under any Loan Document would be subject to U.S. federal withholding Tax imposed by FATCA if such Lender were to fail to
comply with the applicable reporting requirements of FATCA (including those contained in Section 1471(b) or 1472(b) of the Code, as applicable), such Lender
shall  deliver  to  the  Borrower  Representative  at  the  time  or  times  prescribed  by  law  and  at  such  time  or  times  reasonably  requested  by  the  Borrower
Representative  such  documentation  prescribed  by  applicable  law  (including  as  prescribed  by  Section  1471(b)(3)(C)(i)  of  the  Code)  and  such  additional
documentation reasonably requested by the Borrower Representative as may be necessary for the Borrowers to comply with their obligations under FATCA
and to determine that such Lender has complied with such Lender’s obligations under FATCA or to determine the amount, if any, to deduct and withhold from
such payment. Solely for purposes of this Clause 10.5.7(iv), “FATCA” shall include any amendments made to FATCA after the date of this Loan Agreement.

10.5.8    [Reserved]

10.5.9    If any Lender determines, in its sole discretion exercised in good faith, that it has received a refund of any Taxes as to which it has been indemnified pursuant to this
Clause 10.5 (including by the payment of additional amounts pursuant to this Clause 10.5), it shall pay to the Borrowers an amount equal to such refund (but only to
the extent of indemnity payments made under this Clause 10.5 with respect to the Taxes giving rise to such refund), net of all out-of-pocket expenses (including Taxes)
of  such  Lender  and  without  interest  (other  than  any  interest  paid  by  the  relevant  Governmental  Authority  with  respect  to  such  refund).  The  Borrowers,  upon  the
request  of  a  Lender,  shall  repay  to  such  Lender  the  amount  paid  over  pursuant  to  this  Clause  10.5.9  (plus  any  penalties,  interest  or  other  charges  imposed  by  the
relevant Governmental Authority) in the event that such Lender is required to repay such refund to such Governmental Authority. Notwithstanding anything to the
contrary in this Clause 10.5.9, in no event will any Lender be required to pay any amount to the Borrowers pursuant to this Clause 10.5.9 the payment of which would
place such Lender in a less favourable net after-Tax position than such Lender would have been in if the Tax subject to indemnification and giving rise to such refund
had not been deducted, withheld or otherwise imposed and the indemnification payments or additional amounts with respect to such Tax had never been paid. This
Clause 10.5.9 shall not be construed to require any Lender to make available its Tax returns (or any other information relating to its Taxes that it deems confidential)
to the Borrowers or any other Person.

10.5.10    Each party’s obligations under this Clause 10.5 shall survive the resignation or replacement of any Lender or any assignment of rights by, or the replacement of, any

Lender, the termination, expiration or cancellation of the commitments and the repayment, satisfaction or discharge of all obligations under any Loan Document.

10.5.11    If any Lender requests compensation under Clause 10.6 or requests any Borrower to pay any Indemnified Taxes or additional amounts to such Lender pursuant to
Clause  10.5,  then  such  Lender  shall  (at  the  request  of  the  Borrower  Representative)  use  reasonable  efforts  to,  as  applicable,  designate  a  different  lending  office  for
funding or booking its Loans hereunder or to assign its rights and obligations hereunder to another of its offices, branches or affiliates, if, in the judgment of such
Lender, such designation or assignment (i) would eliminate or reduce amounts payable pursuant to Clause 10.6 or Clause 10.5, as the case may be, in the future, and
(ii) would not subject such Lender to any unreimbursed cost or expense and would not otherwise be disadvantageous to such Lender. The Borrowers hereby agree to
pay all reasonable costs and out-of-pocket expenses incurred by such Lender in connection with any such designation or assignment.

40

10.6    Illegality and Increased Costs

10.6.1    If it is or becomes contrary to any law or regulation for the Lender to make available the Loan Facility or to maintain its obligations to do so or fund the Loan, the Lender
shall  promptly  notify  the  Borrower  Representative  whereupon:  (i)  the  Lender's  obligations  to  make  the  Loan  Facility  available  shall  be  terminated;  and  (ii)  the
Borrowers  shall  be  obliged  to  prepay  the  Loan  either:  (a)  forthwith;  or  (b)  on  a  future  specified  date  on  or  before  the  latest  date  permitted  by  the  relevant  law  or
regulation.

10.6.2    If the result of any change that occurs after the Closing Date in (or in the interpretation, administration or application of), or to the generally accepted interpretation or
application of, or the introduction of, any law or regulation is to subject the Lender to any Increased Cost, then: (i) the Lender shall notify the Borrower Representative
in  writing  of  such  event  promptly  upon  its  becoming  aware  of  the  same;  and  (ii)  the  Borrowers  shall,  within  [**]  of  written  demand  (together  with  a  reasonably
detailed invoice), pay to the Lender the amount of the Increased Costs which the Lender has suffered as a result.

11.    INDEMNITIES

11.1    Indemnity for Non-Scheduled Payments

Without  derogating  from,  and  without  prejudice  to  the  Lender's  right  under,  Clause  10  above,  the  Borrowers  shall  indemnify  the  Lender  and  its  Affiliates  and  the
respective  partners,  directors,  trustees,  officers,  employees,  members,  agents,  administrators,  managers  and  representatives  of  the  Lender  and  its  Affiliates  (the
foregoing persons, each an “Indemnitee”) fully on its demand in respect of all expenses, liabilities and losses (but not lost profit) which are suffered or incurred by
such Indemnitee (except for such expenses, liabilities and losses due solely to such Indemnitee’s gross negligence or willful misconduct) as a result of or in connection
with:

11.1.1    any Tranche not being borrowed on the date specified in the Drawdown Notice for any reason other than a default by the Lender;

11.1.2    any failure (for whatever reason) by the Borrowers to make payment of any amount due under the Loan Documents on the due date or, if so payable, on demand; or

11.1.3    the occurrence and/or continuance of an Event of Default and/or the acceleration of repayment of the Loan under Clause 9.4.

11.2    [Reserved].

11.3    Third Party Claims Indemnity

The  Borrowers  shall  indemnify  each  Indemnitee  fully  on  its  demand  in  respect  of  claims,  demands,  proceedings,  liabilities,  losses  and  reasonable,  documented
expenses of every kind, including without limitation legal fees and expenses for one external counsel (and one local counsel for each relevant jurisdiction) ("liability
items") which may be made or brought against, or incurred by, such Indemnitee (except for such expenses, liabilities and losses due solely to such Indemnitee’s gross
negligence or willful misconduct), in any country, in relation to:

11.3.1    any action lawfully taken, or omitted or neglected to be taken, under or in connection with the Loan Documents by such Indemnitee or by any receiver appointed under

the Security Documents after the occurrence of any Event of Default; and

11.3.2    any breach or inaccuracy of any of the representations and warranties contained in Clause 7 of this Loan Agreement or in the Security Documents or any breach of any

undertaking contained in Clause 8 hereof or elsewhere in the Loan Documents.

Notwithstanding anything herein to the contrary, Clause 11 of this Loan Agreement shall not apply with respect to Taxes other than Taxes that represent expenses,
liabilities and losses arising from any non-Tax claim.

12.    [RESERVED]

13.    RELEASE OF SECURITY

13.1.1        The  Lender  hereby  irrevocably  agrees  that  the  Security  Interests  granted  to  the  Lender  Representative  or  any  Lender  on  any  Collateral  shall  be  immediately  and

automatically released, in each case, without any further action by any person:

(i)    upon payment in full of all obligations under the Loan Documents (other than contingent indemnification obligations and expense reimbursement obligations as

to which no claim has been asserted);

(ii)    upon the sale, disposition, distribution or other transfer of such Collateral, as part of or in connection with any transaction permitted hereunder or under each

other Loan Document, in each case to a person that is not a Loan Party;

(iii)        that  constitutes  an  Excluded  Asset  (as  defined  in  the  Guarantee  and  Collateral  Agreement)  as  a  result  of  an  occurrence  not  prohibited  under  this  Loan

Agreement; or

41

(iv)    to the extent such Collateral is owned by a Subsidiary Guarantor, upon release of such Subsidiary Guarantor from its obligations under its guaranty pursuant to

clause 13.1.2 below;

13.1.2        The  Lender  hereby  irrevocably  agrees  that  a  Subsidiary  Guarantor  shall  be  immediately  and  automatically  released  from  any  applicable  guaranty  and  all  other
obligations under the Loan Documents if such Subsidiary Guarantor ceases to be a Subsidiary or otherwise becomes an Excluded Subsidiary as a result of a transaction
permitted under this Loan Document.

13.1.3    In each case described in Clauses 13.1.1 and 13.1.2, the Lender Representative shall (at the cost of the Borrowers, to the extent required by Clause 10.3) promptly take all
appropriate  action,  and  execute  and  deliver  to  the  Borrower  Representative  all  documents,  required  (or  reasonably  requested  by  the  Borrower  Representative)  to
evidence the release of the Security Interest in the applicable Collateral or the release of the guaranty and other obligations of the applicable Subsidiary Guarantor
(including the prompt return of possessory Collateral held by the Lender that is released from the Security Interest created by the Security Documents; provided that
in  the  event  that  the  Lender  had  previously  acknowledged  receipt  of  possessory  collateral  and  loses  or  misplaces  any  such  possessory  collateral,  the  Lender  shall
provide a loss affidavit to the Borrower Representative, in a form reasonably satisfactory to the Borrower Representative).

13.1.4    In the case of Clause 13.1.3, upon the Lender Representative’s reasonable request, the Borrower Representative shall deliver to the Lender Representative a certificate
certifying that the applicable transaction causing the release of Security Interests or release of the Subsidiary Guarantor has been consummated in compliance with
this  Loan  Agreement  and  the  other  Loan  Documents  and  that  such  release  is  permitted  by  this  Loan  Agreement  (and  for  the  avoidance  of  doubt,  no  other
documentation or information shall be required to be provided by the Borrower Representative or any other Group Company).

14.    NOTICES

14.1    Any notice, demand or other communication (“Notice”) to be given by any Party under, or in connection with, this Loan Agreement shall be in writing and signed by or on
behalf of the Party giving it. Any Notice shall be served by sending it by email to the address set out in Clause 14.2, or delivering it by hand or by pre-paid first class
post to the address set out in Clause 14.2 and in each case marked for the attention of the relevant Party set out in Clause 14.2 (or as otherwise notified from time to
time in accordance with the provisions of this Clause 14). Any Notice so served by email, post or hand shall be deemed to have been duly given or made as follows:

14.1.1    if sent by email, at the time of transmission; or

14.1.2    in the case of delivery by hand, when delivered, or

14.1.3    in the case of delivery by first class post, on the second Business Day after posting,

provided that in each case where delivery by hand occurs after 5pm on a Business Day (local time in the place of receipt) or on a day which is not a Business Day,
service shall be deemed to occur at 9am on the next following Business Day (local time in the place of receipt).

References to time in this Clause are to local time in the country of the addressee.

14.2    The addresses and email addresses of the Parties for the purpose of Clause 14 are as follows:

14.2.1    Lender:

Address:    Kreos Capital VII (UK) Limited, c/o BlackRock Investment Management (UK) Limited – Private Debt-EMEA Venture & Growth Lending Group

    12 Throgmorton Avenue, London EC2N 2DL

For the attention of:     [**]

Email: [**]

with copies to:    

Email: [**]

For the attention of: [**]
and:

The Office of the General Counsel (EMEA) (Legal Transactions Group)

42

 
Email: [**]

For the attention of: [**]

14.2.2    Borrowers:

Address            245 First Street, Cambridge, MA 02142

For the attention of:     Chief Financial Officer and Chief Legal Officer

Email:            [**]

with a copy to:

Latham & Watkins LLP

555 11  Street NW, Suite 1000

th

Washington, DC 20004

Attention: [**]

Email: [**]

14.3        A  Party  may  notify  the  other  Party  to  this  Loan  Agreement  of  a  change  to  its  name,  relevant  addressee,  address  or  email  address  for  the  purposes  of  this  Clause  14,

provided that such notice shall only be effective on:

14.3.1    the date specified in the notification as the date on which the change is to take place; or

14.3.2    if no date is specified or the date specified is less than five (5) Business Days after the date on which notice is given, the date following five (5) Business Days after notice

of any change has been given.

14.4    In proving service it shall be sufficient to prove that the envelope containing such notice was properly addressed and sent or delivered to the address shown thereon or that

the facsimile transmission was made and a facsimile confirmation report was received, as the case may be.

15.    GENERAL

15.1        All  agreements,  covenants,  representations,  warranties  and  indemnities  of  the  Borrowers  contained  in  this  Loan  Agreement  or  in  the  Drawdown  Notices  or  other
documents  delivered  pursuant  hereto  or  in  connection  herewith  and  continuing,  shall  survive  and  remain  binding  following  the  execution  and  delivery,  and  the
expiration, cancellation or other termination of this Loan Agreement and/or the Drawdown Notice.

15.2    [Reserved].

15.3        No  failure  to  exercise,  nor  any  delay  in  exercising,  on  the  part  of  the  Lender,  any  right  or  remedy  hereunder  shall  operate  as  a  waiver,  nor  shall  any  single  or  partial
exercise  of  any  right  or  remedy  prevent  any  further  or  other  exercise,  or  the  exercise  of  any  other  right  or  remedy.  The  rights  and  remedies  provided  in  this  Loan
Agreement are cumulative and not exclusive of any rights or remedies provided by law or in equity. Waiver by the Lender of any default shall not constitute waiver of
any other default.

15.4    During the continuance of an Event of Default, the Lender may set off any matured obligation due from the Borrowers or any other Loan Party under the Loan Documents
against any matured obligation owed by the Lender to that party, regardless of the place of payment, booking branch or currency of either obligation. If the obligations
are in different currencies, the Lender may convert either obligation at a market rate of exchange in its usual course of business for the purpose of the set-off.

15.5    No Borrower may assign or transfer its rights, benefits or obligations under this Loan Agreement. The Lender shall have the right, in its sole discretion, to assign, sell,
pledge,  grant  a  Security  Interest  in  or  otherwise  encumber  its  rights  under  the  Loan  Documents  and/or  one  or  more  Drawdown  Notices  to  any  third  party  (an
"Assignee"), and/or may act as an agent for any Assignee in accepting any Drawdown Notice; provided that (A) the Lender may not assign the Loan to any competitor
of  the  Borrower  or  the  Group  (as  identified  in  writing  to  the  Lender  Representative  from  time  to  time)  or  any  Loan  to  Own  Investor  (collectively,  "Disqualified
Institutions") and (B) as long as no Event of Default has occurred and is continuing, the Lender may not assign the Loan (other than assignments made to Affiliates
and Related Funds) without the prior written consent of the Borrower Representative. Each Borrower agrees that if it receives notice from the Lender that it is to make
payments under this Loan Agreement and/or any Drawdown Notice to such Assignee rather than to the Lender, or that any of its other obligations under the relevant
Drawdown Notice are to be owed to the named Assignee, each Borrower shall comply with any such notice (to the extent the assignment to such Assignee was made in
accordance with the terms of this Loan Agreement). Subject to the foregoing, this Loan Agreement and each Drawdown Notice inures to the benefit of, and is binding
upon, the successors and assigns of the Lender. The Lender, or any agent appointed by it, in either case acting solely for this purpose as an agent of the Borrowers,
shall maintain a register (the “Register”) for the recordation of (i) the name and address of the Lender, and the commitments of, and principal

43

amounts (and stated interest) of the Loans owing to, the Lender pursuant to the terms thereof from time to time and (ii) any transfers. The entries in the Register shall
be conclusive absent manifest error. The Register shall be available for inspection by the Borrowers and the Lender at any reasonable time and from time to time upon
reasonable prior notice. The obligations of the Borrowers under the Loan Agreement and the Security Documents are registered obligations and the right, title and
interest of the Lender and its Assignees in and to such obligations shall be transferable only upon notation of such transfer in the Register. This Clause 15.5 shall be
construed so that such obligations are at all times maintained in “registered form” within the meaning of Sections 163(f), 871(h)(2) and 881(c)(2) of the Code and any
related regulations (and any other relevant or successor provisions of the Code or such regulations).

15.6    The Lender agrees to keep all Confidential Information confidential and not to disclose it to anyone, save to the extent permitted by Clauses 15.7 to 15.9, and to ensure that

all Confidential Information is protected with security measures and a degree of care that would apply to its own confidential information.

15.7    The Lender may disclose:

15.7.1    to any of its Affiliates and Related Funds, limited partners, investors and any of its or their officers, directors, employees, professional advisers, auditors, partners and
Representatives such Confidential Information as the Lender shall consider appropriate if any person to whom the Confidential Information is to be given pursuant to
this clause is informed in writing of its confidential nature and that some or all of such Confidential Information may be price-sensitive information except that there
shall be no such requirement to so inform if the recipient is subject to professional obligations to maintain the confidentiality of the information or is otherwise bound
by requirements of confidentiality in relation to the Confidential Information;

15.7.2    to any person appointed by the Lender or by a person to whom clause 15.8.1 or 15.8.2 applies to provide administration or settlement services (including sustainability
service providers, valuation advisors, custodians and depositaries) in respect of one or more of the Loan Documents such Confidential Information as may be required
to be disclosed to enable such service provider to provide services if the service provider to whom the Confidential Information is to be given has entered into a form of
confidentiality undertaking agreed between the Borrower Representative and Lender; and

15.7.3    to any rating agency (including its professional advisers) such Confidential Information as may be required to be disclosed to enable such rating agency to carry out its

normal rating activities in relation to the Loan Documents and/or the Group Companies.

15.8    The Lender may additionally disclose to any person:

15.8.1    to (or through) whom it assigns or transfers (or may potentially assign or transfer) all or any of its rights and/or obligations under the Loan Documents, and to any of

that person's Affiliates, Related Funds, Representatives and professional advisers;

15.8.2    with (or through) whom it enters into (or may potentially enter into), whether directly or indirectly, any sub-participation in relation to, or any other transaction under
which  payments  are  to  be  made  or  may  be  made  by  reference  to,  one  or  more  Loan  Document  and/or  one  or  more  Group  Company  and  to  any  of  that  person's
Affiliates, Related Funds, Representatives and professional advisers;

15.8.3    appointed by the Lender or by a person to whom clause 15.8.1 or 15.8.2 applies to receive communications, notices, information or documents delivered pursuant to the

Loan Documents on its behalf;

15.8.4    who invests in or otherwise finances (or may potentially invest in or otherwise finance), directly or indirectly, any transaction referred to in clause 15.8.1 or 15.8.2 or

leverage providers;

15.8.5    to whom information is required or requested to be disclosed by any court of competent jurisdiction or any governmental, banking, taxation or other regulatory authority

or similar body, the rules of any relevant stock exchange or pursuant to any applicable law or regulation;

15.8.6        to  whom  information  is  required  to  be  disclosed  in  connection  with,  and  for  the  purposes  of,  any  litigation,  arbitration,  administrative  or  other  investigations,

proceedings or disputes;

15.8.7    party to the Loan Documents; or

15.8.8    with the consent of the Borrower Representative,

in each case, such Confidential Information as the Lender shall consider appropriate if: (i) in relation to Clauses 15.8.1 to 15.8.3, the person to whom the Confidential
Information is to be given has entered into a Confidentiality Undertaking except that there shall be no requirement for a Confidentiality Undertaking if the recipient is
a professional adviser and is subject to professional obligations to maintain the confidentiality of the Confidential Information; (ii) in relation to Clause 15.8.4, the
person to whom the Confidential Information is to be given has entered into a Confidentiality Undertaking or is otherwise bound by requirements of confidentiality in
relation to the Confidential Information they receive and is informed that some or all of such Confidential Information may be price-sensitive information; and (iii) in
relation to Clauses 15.8.5 and 15.8.6, the person to whom the Confidential Information is to be given is informed of its confidential nature and that some or all of such
Confidential Information may be price-sensitive information except that there shall be no requirement to so inform if, in the opinion of the Lender, it is not practicable
so to do in the circumstances.

44

15.9    The Lender may disclose to any national or international numbering service provider appointed by it to provide identification numbering services in respect of this Loan

Agreement, the Loans and/or one or more Group Company the following information:

15.9.1    the names, country of domicile and place of incorporation of the Group Companies;

15.9.2    the date of this Loan Agreement (and any amendment and restatement agreement);

15.9.3    the governing law and jurisdiction of this Loan Agreement;

15.9.4    the amount, currencies, types, ranking and term of the Loans;

15.9.5    changes to any of the information previously supplied pursuant to the above; and

15.9.6    such other information agreed between the Lender and the Borrower Representative,

to enable such numbering service provider to provide its usual syndicated loan numbering identification services.

15.10    The Parties acknowledge and agree that each identification number assigned to this Loan Agreement, the Loans and/or one or more Group Companies by a numbering
service provider and the information associated with each such number may be disclosed to users of its services in accordance with the standard terms and conditions
of that numbering service provider.

15.11    The Borrowers and each other Group Company shall keep confidential the terms of this Loan Agreement except:

(a) as may be required by law (including SEC disclosure rules and regulations, it being understood that a copy of this Loan Agreement shall be publicly filed) or a court
of competent jurisdiction, or as requested or required by any governmental or regulatory authority;

(b)  to  the  extent  the  relevant  information  is  already  in  the  public  domain  other  than  by  reason  of  improper  disclosure  by  a  Group  Company  in  violation  of  any
confidentiality obligations hereunder;

(c)  the  Group  Companies  may  disclose  the  terms  of  this  Loan  Agreement  and  the  other  Loan  Documents  to  its  Affiliates  and  to  the  officers,  directors,  agents,
employees,  attorneys,  accountants,  advisors  or  controlling  persons  (and,  in  each  case,  each  of  their  attorneys  and  advisors)  of  any  Group  Company  or  any  of  its
Affiliates;

(d) to the extent necessary in connection with the enforcement of the Group’s rights under the Loan Documents; and

(e) if the Lender Representative consents in writing to such proposed disclosure.

15.12    [Reserved].

15.13    [Reserved].

15.14    This Loan Agreement may not be modified except in writing executed by the Lender Representative and the Borrowers. No supplier or agent of the Lender is authorised

to bind the Lender or to waive or modify any term of this Loan Agreement.

15.15    In any litigation or arbitration proceedings arising out of or in connection with a Loan Document, the entries made in the accounts maintained by the Lender are prima

facie evidence of the matters to which they relate.

15.16    Any certification or determination by the Lender Representative of a rate or amount under any Loan Document is, in the absence of manifest error, conclusive evidence of

the matters to which it relates.

15.17    This Loan Agreement may be executed in counterparts (including facsimile and .pdf copies), each of which shall be an original, but all such counterparts shall together

constitute one and the same instrument.

15.18    Each of the parties hereto agrees and acknowledges that (a) the transaction consisting of this Loan Agreement may be conducted by electronic means, (b) it is such party’s
intent that, if such party signs this Loan Agreement using an electronic signature, it is signing, adopting and accepting this Loan Agreement and that signing this Loan
Agreement using an electronic signature is the legal equivalent of having placed its handwritten signature on this Loan Agreement on paper and (c) it is being provided
with  an  electronic  or  paper  copy  of  this  Loan  Agreement  in  a  usable  format.  The  words  “execution,”  “signed,”  “signature,”  and  words  of  like  import  in  any  Loan
Document  or  any  amendment  or  other  modification  thereof  (including  waivers  and  consents)  shall  be  deemed  to  include  electronic  signatures  or  the  keeping  of
records  in  electronic  form,  each  of  which  shall  be  of  the  same  legal  effect,  validity  or  enforceability  as  a  manually  executed  signature  or  the  use  of  a  paper-based
recordkeeping system, as the case may be, to the extent and as provided for in any applicable law, including the Federal Electronic Signatures in Global and National
Commerce Act, the New York State Electronic Signatures and Records Act, or any other similar state laws based on the Uniform Electronic Transactions Act.

45

15.19        THIS  LOAN  AGREEMENT  AND  THE  OTHER  LOAN  DOCUMENTS  (OTHER  THAN  AS  EXPRESSLY  SET  FORTH  IN  OTHER  LOAN  DOCUMENTS)  SHALL  BE

CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK.

15.20    This Loan Agreement shall become effective when it shall have been executed by the Borrowers and the Lender and when the Lender Representative shall have received

counterparts hereof which, when taken together, bear the signatures of each of the other parties hereto.

15.21    Notwithstanding anything herein to the contrary, if at any time the interest rate applicable to any Loan, together with all fees, charges and other amounts which are
treated  as  interest  on  such  Loan  under  applicable  law  (collectively  the  “Charges”),  shall  exceed  the  maximum  lawful  rate  (the  “Maximum Rate”)  that  may  be
contracted for, charged, taken, received or reserved by the Lender or participation in accordance with applicable law, the rate of interest payable in respect of such
Loan or participation hereunder, together with all Charges payable in respect thereof, shall be limited to the Maximum Rate and, to the extent lawful, the interest and
Charges that would have been payable in respect of such Loan or participation but were not payable as a result of the operation of this Section shall be cumulated and
the interest and Charges payable to the Lender in respect of other Loans or participations or periods shall be increased (but not above the Maximum Rate therefor)
until such cumulated amount, together with interest thereon at the Federal Funds Effective Rate to the date of repayment, shall have been received by such Lender.

15.22        This  Loan  Agreement  and  the  other  Loan  Documents  constitute  the  entire  contract  between  the  parties  relative  to  the  subject  matter  hereof.  Any  other  previous
agreement among the parties with respect to the subject matter hereof is superseded by this Loan Agreement and the other Loan Documents. Nothing in this Loan
Agreement or in the other Loan Documents, expressed or implied, is intended to confer upon any person (other than the parties hereto and thereto, their respective
successors and assigns permitted hereunder and, to the extent expressly contemplated hereby, the related parties of the Lender) any rights, remedies, obligations or
liabilities under or by reason of this Loan Agreement or the other Loan Documents.

15.23    EACH PARTY HERETO HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN
RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS LOAN AGREEMENT OR ANY OF THE
OTHER  LOAN  DOCUMENTS.  EACH  PARTY  HERETO  (A)  CERTIFIES  THAT  NO  REPRESENTATIVE,  AGENT  OR  ATTORNEY  OF  ANY  OTHER  PARTY  HAS
REPRESENTED,  EXPRESSLY  OR  OTHERWISE,  THAT  SUCH  OTHER  PARTY  WOULD  NOT,  IN  THE  EVENT  OF  LITIGATION,  SEEK  TO  ENFORCE  THE
FOREGOING  WAIVER  AND  (B)  ACKNOWLEDGES  THAT  IT  AND  THE  OTHER  PARTIES  HERETO  HAVE  BEEN  INDUCED  TO  ENTER  INTO  THIS  LOAN
AGREEMENT  AND  THE  OTHER  LOAN  DOCUMENTS,  AS  APPLICABLE,  BY,  AMONG  OTHER  THINGS,  THE  MUTUAL  WAIVERS  AND  CERTIFICATIONS  IN
THIS SECTION.

15.24    In the event any one or more of the provisions contained in any Loan Document should be held invalid, illegal or unenforceable in any respect, the validity, legality and
enforceability of the remaining provisions contained herein and therein shall not in any way be affected or impaired thereby (it being understood that the invalidity of
a particular provision in a particular jurisdiction shall not in and of itself affect the validity of such provision in any other jurisdiction). The parties shall endeavor in
good-faith negotiations to replace the invalid, illegal or unenforceable provisions with valid provisions the economic effect of which comes as close as possible to that
of the invalid, illegal or unenforceable provisions.

15.25    Each party hereto irrevocably and unconditionally submits, for itself and its property, to the exclusive jurisdiction of any New York State court or Federal court of the
United States of America sitting in the Borough of Manhattan in New York City, and any appellate court from any thereof, in any action or proceeding arising out of or
relating  to  this  Loan  Agreement  or  the  other  Loan  Documents,  or  for  recognition  or  enforcement  of  any  judgment,  and  each  of  the  parties  hereto  irrevocably  and
unconditionally agrees that all claims in respect of any such action or proceeding may be heard and determined in such New York State or, to the extent permitted by
law, in such Federal court. Each of the parties hereto agrees that a final judgment in any such action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law. Nothing in this Loan Agreement shall affect any right that the Lender may otherwise
have  to  bring  any  action  or  proceeding  relating  to  this  Loan  Agreement  or  the  other  Loan  Documents  against  any  Borrower  or  its  properties  in  the  courts  of  any
jurisdiction.

15.26    Each party hereto irrevocably and unconditionally waives, to the fullest extent it may legally and effectively do so, any objection which it may now or hereafter have to the
laying of venue of any suit, action or proceeding arising out of or relating to this Loan Agreement or the other Loan Documents in any New York State or Federal court.
Each  of  the  parties  hereto  irrevocably  waives,  to  the  fullest  extent  permitted  by  law,  the  defense  of  an  inconvenient  forum  to  the  maintenance  of  such  action  or
proceeding in any such court.

15.27    The Lender notifies the Borrowers that pursuant to the requirements of the USA PATRIOT Act, it is required to obtain, verify and record information that identifies the
Borrowers,  which  information  includes  the  name  and  address  of  the  Borrowers  and  other  information  that  will  allow  the  Lender  to  identify  the  Borrowers  in
accordance with the USA PATRIOT Act.

15.28    Notwithstanding anything to the contrary in any Loan Document or in any other agreement, arrangement or understanding among any such parties, each party hereto
acknowledges that any liability of any Affected Financial Institution arising under any Loan Document, to the extent such liability is unsecured, may be subject to the
write-down and conversion powers of the applicable Resolution Authority and agrees and consents to, and acknowledges and agrees to be bound by:

46

15.28.1    the application of any Write-Down and Conversion Powers by the applicable Resolution Authority to any such liabilities arising hereunder which may be payable to it by

any party hereto that is an Affected Financial Institution; and

15.28.2    the effects of any Bail-In Action on any such liability, including, if applicable:

(i)    a reduction in full or in part or cancellation of any such liability;

(ii)    a conversion of all, or a portion of, such liability into shares or other instruments of ownership in such Affected Financial Institution, its parent undertaking, or a
bridge institution that may be issued to it or otherwise conferred on it, and that such shares or other instruments of ownership will be accepted by it in lieu of
any rights with respect to any such liability under any Loan Document; or

(iii)    the variation of the terms of such liability in connection with the exercise of the write-down and conversion powers of the applicable Resolution Authority.

15.29    Each Borrower hereby irrevocably appoints the Borrower Representative, as the agent for such Borrower on its behalf, to (i) request Loans from the Lender, (ii) to give
and receive notices under the Loan Documents and (iii) take all other action which the Borrower Representative or the Borrowers are permitted or required to take
under this Loan Agreement (including entering into amendments to any Loan Document). Each warranty, covenant, agreement and undertaking made on behalf of a
Borrower or the Borrower Representative shall be deemed for all purposes to have been made by such Borrower and shall be binding upon and enforceable against
such Borrower to the same extent as if the same had been made directly by such Borrower. Each Borrower hereby agrees that such Borrower is jointly and severally
liable for, and hereby absolutely and unconditionally guarantees to the Lender, the full and prompt payment (whether at stated maturity, by acceleration or otherwise)
and performance of, all obligations owed or hereafter owing to the Lender by each other Borrower.

[Remainder of page left blank intentionally]

47

Duly executed by the Parties on the date first set out on the first page of this Loan Agreement.

BORROWER and BORROWER REPRESENTATIVE

AKEBIA THERAPEUTICS, INC.

By: /s/ Ellen Snow    
Name: Ellen Snow
Title: Chief Financial Officer

48

LENDER and LENDER REPRESENTATIVE

Signed

For and on behalf of
KREOS CAPITAL VII (UK) LIMITED
Authorised signatory

By: /s/ Aris Constantinides
Name: Aris Constantinides
Title: Director

49

     Exhibit 10.103

Execution Version

THIS WARRANT AGREEMENT (this “Agreement”), is made and entered into as of January 29, 2024 (the “Effective Date”),  by

and between Akebia Therapeutics, Inc., a Delaware corporation (the “Company”), and Kreos Capital VII Aggregator SCSp (“Holder”).

WARRANT AGREEMENT

Recitals

In order to induce Kreos Capital VII (UK) Limited (“Lender”) to enter into that certain Loan Agreement dated as of January 29, 2024
(the “Loan Agreement”), between the Company, as borrower, and Lender, as lender, the Company has agreed to issue to Holder (an Affiliate
of the Lender), upon the occurrence of certain events, Warrants (as defined below) to purchase such number of shares of Common Stock, par
value $0.00001 (the “Common Stock”), of the Company (the “Warrant Shares” and, together with such Warrants and all shares of Common
Stock (as defined below) or other securities, if any, issuable upon conversion of the Warrants, the “Securities”), and at such exercise price, as
determined pursuant to this Agreement.

Terms

1.

Definitions.  Terms  used  in  this  Agreement  and  not  otherwise  defined  shall  have  the  meaning  given  to  them  in  the  Loan
Agreement.  In  addition  to  terms  separately  defined  in  this  Agreement,  as  used  in  this  Agreement,  the  following  terms  have  the  following
meanings:

“Affiliate” means with respect to any specified entity, any other entity that, directly or indirectly through one or more intermediaries,
controls, or is controlled by, or is under common control with, the specified entity, where the term “control”, “controlled”, or “controlling” as
used  in  this  definition  means  the  possession,  directly  or  indirectly,  of  the  power  to  direct  or  cause  the  direction  of  the  management  and
policies of an entity, whether through the ownership of voting securities, by contract or otherwise.

“Related Fund” in relation to a fund or account (the "first fund"), means: (i) a fund or account which is managed or advised by the
same investment manager or investment adviser as the first fund; or (ii) if it is managed by a different investment manager or investment
adviser, a fund or account whose investment manager or investment adviser is an Affiliate of the investment manager or investment adviser
of the first fund; or (iii) that investment manager or investment adviser itself.

“Warrant” means a warrant to purchase Warrant Shares issued by the Company pursuant to this Agreement and in the form set forth

on Exhibit A.

2.

Issuance of Warrants.

3,076,923 Warrant Shares upon the closing of the transactions contemplated by the Loan Agreement (the “Initial Issue Date”).

(a)

Initial Warrant. The Company shall issue a Warrant (the “Initial Warrant”) reflecting the Holder’s right to purchase

Tranche C Warrant. The Company shall issue a Warrant (the “Tranche C Warrant”) reflecting the Holder’s right to
purchase 1,153,846 Warrant Shares upon the first drawdown of Tranche C as contemplated by the Loan Agreement (the “Tranche  C  Issue
Date” and together with the Initial Issue Date, as applicable, the “Issue Date”).

(b)

be equal to $1.30 (the “Exercise Price”).

(c)

Shares; Exercise Price. The Exercise Price per Warrant Share for the Initial Warrant and the Tranche C Warrant shall

exchange of documents. At the Warrant Closing, the Company

(d)

Warrant Closings; Deliveries. The closing of a Warrant issuance (a “Warrant Closing”) shall take place remotely via

shall deliver an original Warrant dated as of the date of the Warrant Closing, duly executed by an authorized officer of the Company.

3.

follows:

Representations and Warranties of the Company. The Company represents and warrants to, and agrees with, the Holder as

(a)

The  Warrant  Shares  and  all  shares  of  Common  Stock  or  other  securities,  if  any,  issuable  upon  conversion  of  the
Warrant Shares shall, upon issuance in accordance with the terms of the applicable Warrant, be duly authorized, validly issued, fully paid and
non-assessable, and free of any liens and encumbrances except for restrictions on transfer provided for herein or under applicable federal and
state  securities  laws.  The  Company  covenants  that  it  shall,  if  applicable,  at  all  times  following  an  Issue  Date  described  in  Section 2(a)  or
Section 2(b) of this Agreement, as applicable, cause to be reserved and kept available out of its authorized and unissued capital stock such
number of shares of Common Stock and other securities as will be sufficient to permit the exercise in full of the Warrant and the conversion
of the Warrant Shares into Common Stock or such other securities.

securities laws, the Company will use its commercially reasonable efforts to obtain such approvals or registrations as may be appropriate.

(b)

If the issuance of any of the Securities require approvals or registrations under applicable state “blue sky” or federal

(c)

Any corporate action required to be taken by the Board of Directors and/or stockholders of the Company in order to
authorize the Company to enter into this Agreement and the Warrant, and to issue the applicable Securities has been taken or, with respect to
the Securities, will be taken prior to the date of issuance of such Securities. All action on the part of the officers of the Company necessary
for  the  execution  and  delivery  of  this  Agreement  and  the  Warrant  and  the  performance  of  all  respective  obligations  of  the  Company
thereunder has been taken or, in the case of the Warrant, will be taken prior to date of issuance of the Warrant. This Agreement constitutes,
and the Warrant will constitute, valid and legally binding obligations of the Company, enforceable against the Company in accordance with
their respective terms except (i) as limited by applicable bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance, or other
laws of general application relating to or affecting the enforcement of creditors’ rights generally and (ii) as limited by laws relating to the
availability of specific performance, injunctive relief, or other equitable remedies.

(d)

Assuming the accuracy of the Holder’s representations and warranties in Section 4 of this Agreement, the execution,
delivery and performance of the Agreement will not result in any violation or be in conflict with or constitute, with or without the passage of
time and giving of notice, (i) a default under any law applicable to the Company or any instrument, judgment, order, writ, decree, contract or
agreement to which the Company is a party or by which its assets are bound except such defaults as would not reasonably be expected to
materially  and  adversely  affect  the  Company;  or  (ii)  an  event  which  results  in  the  creation  of  any  lien,  charge  or  encumbrance  upon  any
assets of the Company or the suspension, revocation, forfeiture, or nonrenewal of any material permit or license applicable to the Company.

4.

Representations and Warranties of Holder. Holder represents and warrants to the Company as of the date hereof, and as of

the date of issuance of the Warrant, as follows:

Purchase for Own Account. The applicable Securities are being acquired for investment for Holder’s account, not as
a nominee or agent, and not with a view to the public resale or distribution within the meaning of the U.S. Securities Act of 1933, as amended
(the “Securities Act”). Holder also represents that it has not been formed for the specific purpose of acquiring any of the Securities.

(a)

(b)

Disclosure  of  Information.  Holder  is  aware  of  the  Company’s  business  affairs  and  financial  condition  and  has
received or has had access to all the information it considers necessary or appropriate to make an informed investment decision with respect
to the acquisition of the applicable Securities. Holder further has had an opportunity to ask questions and receive answers from the Company
regarding the terms and conditions of the applicable Securities and to obtain additional information (to the

    2

extent  the  Company  possessed  such  information  or  could  acquire  it  without  unreasonable  effort  or  expense)  necessary  to  verify  any
information furnished to Holder or to which Holder has access.

(c)

Investment Experience. Holder understands that the purchase of the Securities involves substantial risk. Holder has
experience as an investor in securities of companies in the development stage and acknowledges that Holder can bear the economic risk of
such Holder’s investment in the Securities and has such knowledge and experience in financial or business matters that Holder is capable of
evaluating the merits and risks of its investment in the applicable Securities and/or has a preexisting personal or business relationship with
the  Company  and  certain  of  its  officers,  directors  or  controlling  persons  of  a  nature  and  duration  that  enables  Holder  to  be  aware  of  the
character, business acumen and financial circumstances of such persons.

under the Securities Act.

(d)

Accredited  Investor  Status.  Holder  is  an  “accredited  investor”  within  the  meaning  of  Regulation  D  promulgated

(e)

The Securities Act. Holder understands that the applicable Securities will not be registered under the Securities Act
in reliance upon a specific exemption therefrom, which exemption depends upon, among other things, the bona fide nature of the Holder’s
investment  intent  as  expressed  herein.  Holder  understands  any  Securities  issued  must  be  held  indefinitely  unless  subsequently  registered
under the Securities Act and qualified under applicable state securities laws, or unless exemption from such registration and qualification are
otherwise available.

5.

Restrictive Legends.

legend substantially similar to the following (in addition to any other legend required by applicable law):

(a)

Legend. Holder  understands  that  any  certificates  representing  the  Securities  shall  be  stamped  or  imprinted  with  a

THIS  WARRANT  AND  THE  SHARES  ISSUABLE  HEREUNDER  AND  ANY  SHARES  ISSUABLE  UPON  CONVERSION
THEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES
ACT”), OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE
TRANSFERRED  UNLESS  AND  UNTIL  REGISTERED  UNDER  SAID  ACT  AND  LAWS  OR,  IN  THE  OPINION  OF  LEGAL
COUNSEL  IN  FORM  AND  SUBSTANCE  SATISFACTORY  TO  THE  ISSUER,  SUCH  OFFER,  SALE,  PLEDGE  OR  OTHER
TRANSFER IS EXEMPT FROM SUCH REGISTRATION.

Instructions Regarding Transfer Restrictions. Holder consents to the Company making a notation on its records and
giving instructions to any transfer agent, if applicable, in order to implement the restrictions on transfer established in Section 5(a)  of  this
Agreement.

(b)

(c)

Removal of Legend. The legend identified in Section 5(a) of this Agreement stamped or imprinted on any certificate
evidencing  any  Securities  and  any  stock  transfer  instructions  and  record  notations  with  respect  to  such  Securities,  if  applicable,  shall  be
removed and the Company shall issue a certificate without such legend to the holder of such Securities if (i) such Securities are registered
under the Securities Act, or (ii) such holder provides the Company with an opinion of counsel reasonably satisfactory to the Company and its
transfer  agent,  if  applicable,  to  the  effect  that  a  sale  or  transfer  of  such  Securities  may  be  made  without  registration  or  qualification.  The
Company agrees that it shall not require an opinion of counsel if (x) there is no material question as to the availability of Rule 144 (without
restriction, including the provisions of Rule 144(c), (e) or (f)) promulgated under the Securities Act or (y) the transfer is to an Affiliate or
Related  Fund  of  Holder,  provided  that  any  such  transferee  is  an  “accredited  investor”  as  defined  in  Regulation  D  promulgated  under  the
Securities Act.

6.

Transfer of the Securities. The Securities may not be transferred or assigned in whole or in part except in compliance with

applicable federal and state securities laws by the transferor and the transferee.

7.

General Provisions.

    3

(a)

Entire Agreement.  This  Agreement  (including  the  Exhibit)  constitutes  the  entire  agreement  among  the  parties  and
supersedes  and  cancels  any  prior  agreements,  representations,  warranties,  or  communications,  whether  oral  or  written,  among  the  parties
relating to the subject matter of, or the transactions contemplated by, this Agreement. Neither this Agreement nor any of its provisions may
be  modified,  changed,  waived,  discharged,  or  terminated  orally.  This  Agreement  may  only  be  modified,  changed,  waived,  discharged,  or
terminated by an agreement in writing signed by the party against whom or which the enforcement of such modification, change, waiver,
discharge, or termination is sought.

(b)

Assignment, Successors and Assigns. The rights and obligations under this Agreement may be assigned by Holder.
The terms and conditions of this Agreement shall inure to the benefit of and be binding upon the respective successors and assigns of the
parties.  Nothing  in  this  Agreement,  express  or  implied,  is  intended  to  confer  upon  any  party  other  than  the  parties  or  their  respective
successors and assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement, except as expressly provided in
this Agreement.

(c)

Notices. All notifications, requests, demands, and other communications required or permitted to be given under this
Agreement shall be in writing and shall be deemed given when mailed (with return receipt requested), emailed, faxed (which is confirmed),
or sent via a recognized overnight courier service such as Federal Express, to the parties at the addresses set forth on the signature page, or
pursuant to such other instructions as may be designated in writing by the party to receive such notice.

New York, without giving effect to its principles regarding conflicts of law.

(d)

Governing Law.  This  Agreement  shall  be  governed  by  and  construed  in  accordance  with  the  laws  of  the  State  of

(e)

Counterparts.  This  Agreement  may  be  executed  in  two  or  more  counterparts,  each  of  which  shall  be  deemed  an
original, but all of which together shall constitute one and the same instrument. Counterparts may be delivered via facsimile, electronic mail
(including PDF) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered and
be valid and effective for all purposes.

Attorney’s Fees. If any action at law or in equity (including arbitration) is necessary to enforce or interpret the terms
of this Agreement, the prevailing party in such shall be entitled to receive from the non-prevailing party the prevailing party’s reasonable
attorney’s fees, costs and necessary disbursements in addition to any other relief to which it may be entitled.

(f)

(g)

No Further Obligations. The Company acknowledges and agrees that the Holder has not made any representation,
undertaking, commitment or agreement to provide or assist the Company in obtaining any financing, investment or other assistance, other
than with regard to the Loan Agreement. In addition, the Company acknowledges and agrees that (i) no statements, whether written or oral,
made  by  the  Holder  or  its  representatives  on  or  after  the  date  of  this  Agreement  shall  create  an  obligation,  commitment  or  agreement  to
provide or assist the Company in obtaining any financing or investment, (ii) the Company shall not rely on any such statement by any the
Holder or its representatives and (iii) an obligation, commitment or agreement to provide or assist the Company in obtaining any financing or
investment may only be created by a written agreement, signed by the Holder and the Company, setting forth the terms and conditions of
such financing or investment and stating that the parties intend for such writing to be a binding obligation or agreement. The Holder shall
have the right, in its sole and absolute discretion, to refuse or decline to participate in any other financing of or investment in the Company,
and shall have no obligation to assist or cooperate with the Company in obtaining any financing, investment or other assistance.

(h)

Certain Remedies.  Each  party  acknowledges  and  agrees  that  the  other  party  would  be  damaged  irreparably  if  this
Agreement is not performed in accordance with its terms or otherwise is breached and that a party will be entitled to an injunction and other
equitable relief (without posting any bond or other security) to prevent breaches hereof and to enforce specifically this Agreement and its
terms in addition to any other remedy to which such party may be entitled hereunder.

    4

(i)

Tax Treatment. The Holder and the Company intend and agree that (i) the Initial Warrant and Tranche A drawn on
the Initial Issue Date pursuant to the Loan Agreement are to be treated as an “investment unit” within the meaning of Section 1273(c)(2) of
the Code and Treasury Regulation Section 1.1273-2(h), (ii) the Tranche C Warrant and the first drawn portion of the Tranche C pursuant to
the Loan Agreement are to be treated as an “investment unit” within the meaning of Section 1273(c)(2) of the Code and Treasury Regulation
Section 1.1273-2(h), and (iii) the fair market values of the Initial Warrant, Tranche C Warrant, Tranche A and Tranche C shall be reasonably
determined by the Company with the consent of the Holder (not to be unreasonably withheld, delayed or conditioned). The parties hereto
agree  not  to  take  a  position  inconsistent  with  this  Section  7(i)  for  U.S.  federal  and  applicable  state  and  local  income  tax  purposes  unless
required by a final “determination” within the meaning of Section 1313 of the Code to the contrary.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

    5

IN WITNESS WHEREOF, the duly authorized representatives of the parties have executed and delivered this Agreement as of the

Effective Date.

AKEBIA THERAPEUTICS, INC.

By: /s/ Ellen Snow    

Name: Ellen Snow
Title: Chief Financial Officer

Address per Section 7(c):

245 First Street
Cambridge, MA 02142

Attn: Chief Financial Officer and Chief Legal Officer
Email: [**]

KREOS CAPITAL VII AGGREGATOR SCSp

By: /s/ Mark Collins    

Name: Mark Collins
Title: Manager

Address per Section 7(c):

1 Boulevard de la Foire
1528, Luxembourg

Attn: Sonia Benhamida, Guy Arbib, Alexander Babulevich
Email: [**]

[Signature Page to Warrant Agreement]

 
 
 
 
 
 
 
EXHIBIT A

Form of Warrant

Incorporated by reference to Exhibit 4.7 of this Annual Report on Form 10-K filed with the
Securities Exchange Commission on March 14, 2024

Exhibit 23.1

We consent to the incorporaon by reference in the following Registraon Statements:

Consent of Independent Registered Public Accounng Firm

(1) Registraon Statement (Form S-8 No. 333-196748) pertaining to the Amended and Restated 2008 Equity Incenve Plan, the 2014 Incenve Plan, and

the 2014 Employee Stock Purchase Plan of Akebia Therapeucs, Inc.,

(2) Registraon Statement (Form S-8 No. 333-209469) pertaining to the 2014 Incenve Plan and the 2014 Employee Stock Purchase Plan of Akebia

Therapeucs, Inc.,

(3) Registraon Statement (Form S-8 No. 333-216475) pertaining to the 2014 Incenve Plan and the 2016 Inducement Award Program of Akebia

Therapeucs, Inc.,

(4) Registraon Statement (Form S-8 No. 333-222728) pertaining to the 2014 Incenve Plan and the 2016 Inducement Award Program of Akebia

Therapeucs, Inc.,

(5) Registraon Statement (Form S-8 No. 333-228772) pertaining to the 2014 Incenve Plan of Akebia Therapeucs, Inc. and the 1999 Share Opon

Plan, 2004 Long-Term Incenve Plan, 2007 Incenve Plan, Amended and Restated 2013 Incenve Plan, and 2018 Equity Incenve Plan of Keryx
Biopharmaceucals, Inc.,

(6) Registraon Statement (Form S-8 No. 333-229366) pertaining to the 2014 Incenve Plan, the 2014 Employee Stock Purchase Plan, and the

Inducement Grant Awards (January 2018 – December 2018) of Akebia Therapeucs, Inc.,

(7) Registraon Statement (Form S-8 No. 333-233140) pertaining to the Amended and Restated 2014 Employee Stock Purchase Plan of Akebia

Therapeucs, Inc.,

(8) Registraon Statement (Form S-8 No. 333-236060) pertaining to the 2014 Incenve Plan and the Inducement Grant Awards (January 2019 –

December 2019) of Akebia Therapeucs, Inc.,

(9) Registraon Statement (Form S-8 No. 333-252336) pertaining to the 2014 Incenve Plan and the Inducement Grant Awards (January 2020 –

December 2020) of Akebia Therapeucs, Inc.,

(10) Registraon Statement (Form S-8 No. 333-262392) pertaining to the 2014 Incenve Plan, as amended, and the Inducement Grant Awards (January

2021 – December 2021) of Akebia Therapeucs, Inc.,

(11) Registraon Statement (Form S-8 No. 333-269457) pertaining to the 2014 Incenve Plan, as amended, and the Inducement Stock Opon Awards

(January 2022 – December 2022) of Akebia Therapeucs, Inc.,

(12) Registraon Statement (Form S-8 No. 333-272453) pertaining to the 2023 Stock Incenve Plan of Akebia Therapeucs, Inc., and

(13) Registraon Statement (Form S-8 No. 333-276770) pertaining to the Inducement Stock Opon Awards (January 2023 – December 2023) of Akebia

Therapeucs, Inc.;

of our reports dated March 14, 2024, with respect to the consolidated financial statements of Akebia Therapeucs, Inc. and the effecveness of internal
control over financial reporng of Akebia Therapeucs, Inc. included in this Annual Report (Form 10-K) of Akebia Therapeucs, Inc. for the year ended
December 31, 2023.

/s/ Ernst & Young LLP
Boston, Massachuses
March 14, 2024

Exhibit 31.1

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, John P. Butler, certify that:

1.

2.

3.

4.

I have reviewed this Annual Report on Form 10-K of Akebia Therapeutics, Inc.;

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this
report;

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-
15(f)) for the registrant and have:

(a)

(b)

(c)

(d)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by
others within those entities, particularly during the period in which this report is being prepared;

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our
supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for
external purposes in accordance with generally accepted accounting principles;

Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most
recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably
likely to materially affect, the registrant’s internal control over financial reporting; and

5.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the
registrant’s auditors and the Audit Committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

(a)

(b)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are
reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal
control over financial reporting.

Date:

March 14, 2024

By:

/s/ John P. Butler
John P. Butler
President, Chief Executive Officer and Director
(Principal Executive Officer)

Exhibit 31.2

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Ellen E. Snow, certify that:

1.

2.

3.

4.

I have reviewed this Annual Report on Form 10-K of Akebia Therapeutics, Inc.;

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this
report;

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-
15(f)) for the registrant and have:

(a)

(b)

(c)

(d)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by
others within those entities, particularly during the period in which this report is being prepared;

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our
supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for
external purposes in accordance with generally accepted accounting principles;

Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most
recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably
likely to materially affect, the registrant’s internal control over financial reporting; and

5.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the
registrant’s auditors and the Audit Committee of the registrant’s Board of Directors (or persons performing the equivalent functions):

(a)

(b)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are
reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal
control over financial reporting.

Date:

March 14, 2024

By:

/s/ Ellen E. Snow
Ellen E. Snow
Senior Vice President, Chief Financial Officer
and Treasurer
(Principal Financial Officer)

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 (18 U.S.C. Section 1350)

In connection with the accompanying Annual Report of Akebia Therapeutics, Inc., or the Company, on Form 10-K for the fiscal year ended December 31,
2023, or the Report, I, John P. Butler, as Chief Executive Officer and President of the Company, and I, Ellen E. Snow, as Senior Vice President, Chief
Financial Officer and Treasurer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act
of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Exhibit 32.1

Date:

March 14, 2024

Date:

March 14, 2024

By:

By:

/s/ John P. Butler
John P. Butler
President, Chief Executive Officer and Director
(Principal Executive Officer)

/s/ Ellen E. Snow
Ellen E. Snow
Senior Vice President, Chief Financial Officer
and Treasurer
(Principal Financial Officer)

 
Exhibit 97.1

Akebia Therapeutics, Inc.

Dodd-Frank Compensation Recovery Policy

This Compensation Recovery Policy (this “Policy”) is adopted by Akebia Therapeutics, Inc. (the “Company”) in accordance with
Nasdaq Listing Rule 5608 (“Rule 5608”), which implements Rule 10D-1 under the Securities Exchange Act of 1934, as amended
(the “Exchange Act”) (as promulgated pursuant to Section 954 of the Dodd-Frank Wall Street Reform and Consumer Protection
Act of 2010). This Policy is effective as of October 2, 2023 (the “Effective Date”).

1.

Definitions

(a)

“Accounting Restatement” means a requirement that the Company prepare an accounting restatement due to the

material noncompliance of the Company with any financial reporting requirement under the U.S. federal securities laws,
including any required accounting restatement to correct an error in previously issued financial statements that is material to the
previously issued financial statements, or that would result in a material misstatement if the error were corrected in the current
period or left uncorrected in the current period. Changes to the Company’s financial statements that do not represent error
corrections are not an Accounting Restatement, including: (A) retrospective application of a change in accounting principle; (B)
retrospective revision to reportable segment information due to a change in the structure of the Company’s internal organization;
(C) retrospective reclassification due to a discontinued operation; (D) retrospective application of a change in reporting entity,
such as from a reorganization of entities under common control; and (E) retrospective revision for stock splits, reverse stock
splits, stock dividends or other changes in capital structure.

(b)

“Committee” means the Compensation Committee of the Company’s Board of Directors (the “Board”).

(c)

“Covered Person” means a person who served as an Executive Officer at any time during the performance period

for the applicable Incentive-Based Compensation.

(d)

“Erroneously Awarded Compensation” means the amount of Incentive-Based Compensation that was Received

that exceeds the amount of Incentive-Based Compensation that otherwise would have been Received had the amount of
Incentive-Based Compensation been determined based on the restated amounts, computed without regard to any taxes paid by the
Covered Person or by the Company on the Covered Person’s behalf. For Incentive-Based Compensation based on stock price or
total shareholder return, where the amount of Erroneously Awarded Compensation is not subject to mathematical recalculation
directly from the information in an Accounting Restatement, the amount of Erroneously Awarded Compensation will be based on
a reasonable estimate by the Committee of the effect of the Accounting Restatement on the stock price or total shareholder return
upon which the Incentive-Based Compensation was Received. The Company will maintain documentation of the determination
of that reasonable estimate and provide such documentation to Nasdaq.

(e)

“Executive Officer” means the Company’s officers as defined in Rule 16a-1(f) under the Exchange Act.

(f)

“Financial Reporting Measures” means (A) measures that are determined and presented in accordance with the
accounting principles used in preparing the Company’s financial statements, and any measures that are derived wholly or in part
from such measures (whether or not such measures are presented within the Company’s financial statements or

    1

included in a filing made with the U.S. Securities and Exchange Commission), (B) stock price and (C) total shareholder return.

Exhibit 97.1

(g)

“Incentive-Based Compensation” means any compensation that is granted, earned, or vested based wholly or in

part upon the attainment of a Financial Reporting Measure.

(h)

Incentive-Based Compensation is deemed to be “Received” in the Company’s fiscal period during which the

Financial Reporting Measure specified in the applicable Incentive-Based Compensation award is attained, even if the payment or
grant of the Incentive-Based Compensation occurs after the end of that period or is subject to additional time-based vesting
requirements.

(i)

“Recovery Period” means the three completed fiscal years immediately preceding the earlier of: (A) the date the

Board, a committee of the Board, or the officer or officers of the Company authorized to take such action if Board action is not
required, concludes, or reasonably should have concluded, that the Company is required to prepare an Accounting Restatement;
or (B) the date a court, regulator, or other legally authorized body directs the Company to prepare an Accounting Restatement. In
addition, if there is a change in the Company’s fiscal year end, the Recovery Period will also include any transition period to the
extent required by Rule 5608.

2.

Recovery of Erroneously Awarded Compensation

Subject to the terms of this Policy and the requirements of Rule 5608, if the Company is required to prepare an

Accounting Restatement, the Company will attempt to recover, reasonably promptly from each Covered Person, any Erroneously
Awarded Compensation that was Received by such Covered Person during the Recovery Period pursuant to Incentive-Based
Compensation that is subject to this Policy.

3.

Interpretation and Administration

(a)

Role of the Committee. This Policy will be interpreted by the Committee in a manner that is consistent with Rule

5608 and any other applicable law and will otherwise be interpreted in the business judgment of the Committee. All decisions
and interpretations of the Committee that are consistent with Rule 5608 will be final and binding.

(b)

Compensation Not Subject to this Policy. This Policy does not apply to Incentive-Based Compensation that was

Received before the Effective Date. With respect to any Covered Person, this Policy does not apply to Incentive-Based
Compensation that was Received by such Covered Person before beginning service as an Executive Officer.

(c)

Determination of Means of Recovery. Subject to the requirement that recovery be made reasonably promptly, the
Committee will determine the appropriate means of recovery, which may vary between Covered Persons or based on the nature
of the applicable Incentive-Based Compensation, and which may involve, without limitation, establishing a deferred repayment
plan or setting off against current or future compensation otherwise payable to the Covered Person. Recovery of Erroneously
Awarded Compensation will be made without regard to income taxes paid by the Covered Person or by the Company on the
Covered Person’s behalf in connection with such Erroneously Awarded Compensation.

(d)

Determination That Recovery is Impracticable. The Company is not required to recover Erroneously Awarded

Compensation if a determination is made by the Committee that either (A) after the Company has made and documented a
reasonable attempt to recover such

    2

Exhibit 97.1

Erroneously Awarded Compensation, the direct expense paid to a third party to assist in enforcing this Policy would exceed the
amount to be recovered or (B) recovery of such Erroneously Awarded Compensation would likely cause an otherwise tax-
qualified retirement plan, under which benefits are broadly available to employees of the registrant, to fail to meet the
requirements of Section 401(a)(13) or 411(a) of the Internal Revenue Code and regulations thereunder.

(e)

No Indemnification or Company-Paid Insurance. The Company will not indemnify any Covered Person against
the loss of Erroneously Awarded Compensation and will not pay or reimburse any Covered Person for the purchase of a third-
party insurance policy to fund potential recovery obligations.

(f)

Interaction with Other Clawback Provisions. The Company will be deemed to have recovered Erroneously

Awarded Compensation in accordance with this Policy to the extent the Company actually receives such amounts pursuant to any
other Company policy, program or agreement, pursuant to Section 304 of the Sarbanes-Oxley Act or otherwise.

(g)

No Limitation on Other Remedies. Nothing in this Policy will be deemed to limit the Company’s right to terminate

employment of any Covered Person, to seek recovery of other compensation paid to a Covered Person, or to pursue other rights
or remedies available to the Company under applicable law.

Adopted by the Board on November 21, 2023.

    3