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Agios Pharmaceuticals, Inc.

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FY2021 Annual Report · Agios Pharmaceuticals, Inc.
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, DC 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, 2021

OR

Commission File Number:

001-36014

AGIOS PHARMACEUTICALS, INC.
(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)
88 Sidney Street,
Cambridge, MA
(Address of principal executive offices)

26-0662915
(IRS Employer
Identification No.)
02139

(Zip Code)

Title of Class
Common Stock, Par Value $0.001 per share

Registrant’s telephone number, including area code:
(617) 649-8600
Securities registered pursuant to Section 12(b) of the Act:
Trading symbol(s)
AGIO

Name of Exchange on Which Registered
Nasdaq Global Select Market

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ☑        No  ☐
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ☐        No  ☑
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities 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 submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation 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 reporting company, or an emerging growth

company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.
Emerging growth
Large accelerated filer  ☑
company  ☐

Smaller reporting
company  ☐

Non-accelerated filer  ☐

Accelerated filer  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial

accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial

reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☑

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes   ☐         No   ☑
The aggregate market value of the voting and non-voting Common Stock held by non-affiliates of the registrant computed by reference to the price of the registrant’s Common

Stock as of June 30, 2021 (based on the last reported sale price on the Nasdaq Global Select Market as of such date) was $3,267,590,001.

As of February 18, 2022, there were 54,637,501 shares of Common Stock, $0.001 par value per share, outstanding.

DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s definitive proxy statement for its 2022 Annual Meeting of Stockholders to be filed pursuant to Regulation 14A within 120 days of the end of the

registrant’s fiscal year ended December 31, 2021 are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein.

Table of Contents

Item 1.
Item 1A.
Item 1B.
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.

Table of contents
PART I

Page

Business
Risk Factors
Unresolved Staff Comments
Properties
Legal Proceedings
Mine Safety Disclosures

PART II

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity
Securities
Reserved
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures about Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information
Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

PART III

Directors, Executive Officers and Corporate Governance
Executive Compensation
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Certain Relationships and Related Transactions, and Director Independence
Principal Accountant Fees and Services

Exhibits and Financial Statement Schedules
Form 10-K Summary

PART IV

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References to Agios

PART I

Throughout  this  Annual  Report  on  Form  10-K,  “the  Company,”  “we,”  “us,”  and  “our,”  and  similar  expressions,  except  where  the  context  requires
otherwise,  refer  to  Agios  Pharmaceuticals,  Inc.  and  its  consolidated  subsidiaries,  and  “our  board  of  directors”  refers  to  the  board  of  directors  of  Agios
Pharmaceuticals, Inc.

Cautionary Note Regarding Forward-looking Information

This  Annual  Report  on  Form  10-K  contains  forward-looking  statements  that  involve  substantial  risks  and  uncertainties.  All  statements,  other  than
statements of historical facts, contained in this Annual Report on Form 10-K, including statements regarding our strategy, future operations, future financial
position,  future  revenue,  projected  costs,  prospects,  plans,  and  objectives  of  management,  are  forward-looking  statements.  The  words  “anticipate,”
“believe,” “estimate,” “expect,” “goal,” “intend,” “may,” “plan,” “predict,” “project,” “strategy,” “target,” “potential,” “will,” “would,” “could,” “should,”
“continue,” “vision” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these
identifying words.

The forward-looking statements in this Annual Report on Form 10-K include, among other things, statements regarding:

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our plans to commercialize PYRUKYND® (mitapivat) for the treatment of hemolytic anemia in adults with pyruvate kinase (PK) deficiency
in the United States;

the  initiation,  timing,  progress  and  results  of  current  and  future  preclinical  studies  and  clinical  trials,  and  our  research  and  development
programs;

the potential of the isoforms of pyruvate kinase, including PKR and PKM2, as therapeutic targets;

the potential benefits of our products and product candidates targeting PKR, including PYRUKYND® (mitapivat) and AG-946;

our plans to develop and commercialize any product candidates for which we may receive approval, either alone or with partners;

our ability to establish and maintain collaborations or to obtain additional funding, if needed;

the timing or likelihood of regulatory filings and approvals, including the marketing authorization application, or MAA, for PYRUKYND®
for the treatment of pyruvate kinase deficiency that we submitted to the European Medicines Agency, or EMA, in June 2021;

our strategic vision.

the timing, likelihood and amount of contingent consideration we may receive from Servier Pharmaceuticals LLC, or Servier, in connection
with the sale of our oncology business to Servier that we consummated in March 2021;

the implementation of our business model and strategic plans for our business, product candidates and technology;

our commercialization, marketing and manufacturing capabilities and strategy;

the rate and degree of market acceptance and clinical utility of our products;

our competitive position;

our intellectual property position;

developments and projections relating to our competitors and our industry;

the impact of the COVID-19 pandemic on our business, operations, strategy, goals and anticipated milestones; and

our estimates regarding expenses, future revenue, capital requirements and needs for additional financing.

We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and you should not place undue reliance on
our  forward-looking  statements.  Actual  results  or  events  could  differ  materially  from  the  plans,  intentions  and  expectations  disclosed  in  the  forward-
looking statements we make. We have included important factors in this Annual Report on Form 10-K, particularly in the "Summary Risk Factors" and
“Risk  Factors”  sections,  that  could  cause  actual  results  or  events  to  differ  materially  from  the  forward-looking  statements  that  we  make.  Our  forward-
looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments we may make.

You should read this Annual Report on Form 10-K and the documents that we have filed as exhibits to this Annual Report on Form 10-K completely and
with  the  understanding  that  our  actual  future  results  may  be  materially  different  from  what  we  expect.  We  do  not  assume  any  obligation  to  update  any
forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

This Annual Report on Form 10-K includes statistical and other industry and market data that we obtained from industry publications and research, surveys
and studies conducted by third parties. All of the market data used in this Annual Report on

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Form 10-K involves a number of assumptions and limitations, and you are cautioned not to give undue weight to such data. We believe that the information
from these industry publications, surveys and studies is reliable. The industry in which we operate is subject to a high degree of uncertainty and risk due to
a variety of important factors, including those described in the sections titled “Summary Risk Factors” and “Risk Factors.”

Summary Risk Factors

Our business is subject to a number of risks that if realized could materially affect our business, financial condition, results of operations, cash flows and
access to liquidity. These risks are discussed more fully in the “Risk Factors” section of this Annual Report on Form 10-K. Our principal risks include the
following:

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If we do not successfully commercialize PYRUKYND® for the treatment of hemolytic anemia in adults with pyruvate kinase (PK) deficiency in the
United States and other products for which we receive approval, our prospects may be substantially harmed. Our ability to generate product revenue
from PYRUKYND® depends heavily on our successful development and commercialization of the product.

We depend heavily on the success of our clinical product candidates, including PYRUKYND® for use in indications other than PK deficiency and in
other jurisdictions. Clinical trials of our product candidates may not be successful for a number of important reasons. If we or our collaborators are
unable to commercialize our product candidates or experience significant delays in doing so, our business will be materially harmed.

We may not be successful in our efforts to identify or discover potential product candidates or to develop additional medicines of commercial value.

We  may  not  achieve  our  goals  included  in  our  strategic  vision,  including  receiving  regulatory  approvals  for  our  product  candidates  in  additional
indications, expanding our clinical and research pipelines and achieving positive cash flow. If we are unable to achieve the goals in our strategic
vision, such failure would likely result in significant harm to our financial position and adversely impact our stock price.

The COVID-19 pandemic has and may continue to affect our ability to initiate or continue our planned, ongoing and future clinical trials, disrupt
regulatory activities, disrupt our ability to maintain a commercial infrastructure for PYRUKYND® or have other adverse effects on our business and
operations.

PYRUKYND®, or any of our product candidates that may receive marketing approval in the future, may be less effective than previously believed
or  cause  undesirable  side  effects  that  were  not  previously  identified  in  clinical  trials  or  may  fail  to  achieve  the  degree  of  market  acceptance  by
physicians, patients, healthcare payors and others in the medical community necessary for commercial success, which could compromise our ability,
or that of any collaborators, to market the product.

If we are unable to establish and maintain sales and marketing capabilities or enter into agreements with third parties to sell and market our products,
we may not be successful in commercializing PYRUKYND® or our product candidates if and when they are approved.

We face substantial competition, which may result in others discovering, developing or commercializing products before or more successfully than
we  do.  There  are  a  number  of  large  pharmaceutical  and  biotechnology  companies  that  currently  market  and  sell  products  or  are  pursuing  the
development  of  products  for  the  treatment  of  the  disease  indications  for  which  we  are  developing  our  product  or  our  product  candidates.  Our
competitors may develop products that are more effective, safer, more convenient or less costly than PYRUKYND® or any product candidates that
we are developing or that would render PYRUKYND® or our product candidates obsolete or non-competitive.

We  may  face  new  challenges  as  a  smaller,  less  diversified  company  following  our  sale  of  our  oncology  business  to  Servier.  We  are  singularly
focused on products and product candidates for the treatment of genetically defined diseases, or GDDs. As a result, we may be more susceptible to
changing  market  conditions,  including  fluctuations  and  risks  particular  to  the  markets  for  patients  with  GDDs,  than  a  more  diversified  company,
which could adversely affect our business, financial condition and results of operations.

If our existing capital is insufficient to execute our operating plan through major catalysts and to cash-flow positivity, we will need to raise capital,
and  if  we  are  unable  to  raise  capital  when  needed,  we  would  be  forced  to  delay,  reduce  or  eliminate  our  product  development  programs  or
commercialization efforts.

We  have  historically  incurred  operating  losses.  We  expect  to  incur  losses  in  the  future  and  may  never  achieve  or  maintain  profitability.  Our  net
income  for  the  year  ended  December  31,  2021  was  $1,604.7  million  and  our  net  losses  for  the  years  ended  December  31,  2020  and  2019  were
$327.4 million and $411.5 million, respectively. The net income we generated in the year ended December 31, 2021 was primarily due to the sale of
our oncology business to Servier in March 2021. As of December 31, 2021, we had an accumulated deficit of $238.8 million.

We may depend on collaborations with third parties for the development and commercialization of our product candidates. If those collaborations are
not successful, we may not be able to capitalize on the market potential of these product candidates.

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We currently rely and expect to continue to rely on third parties for the manufacture of our product candidates for preclinical and clinical testing and
for commercial supply of PYRUKYND® and any product candidate for which we obtain marketing approval. Any performance failure on the part
of our existing or future third-party manufacturers could delay clinical development, marketing approval or our commercialization efforts.

If we are unable to obtain and maintain patent or trade secret protection for our medicines and technology, or if the scope of the patent protection
obtained is not sufficiently broad, our competitors could develop and commercialize medicines and technology similar or identical to ours, and our
ability to successfully commercialize our medicines and technology may be adversely affected. If we do not, or are unable to, obtain or maintain any
issued  patents  for  any  of  our  most  advanced  product  candidates,  it  could  have  a  material  adverse  effect  on  our  competitive  position,  business,
financial condition, results of operations, and prospects.

Item 1. Business

General

We  are  a  biopharmaceutical  company  committed  to  transforming  patients’  lives  through  scientific  leadership  in  the  field  of  cellular  metabolism  and
adjacent areas of biology, with the goal of creating differentiated, small molecule medicines for genetically defined diseases. We take a systems biology
approach to deeply understand disease states, drive the discovery and validation of novel therapeutic targets, and define patient selection strategies, thereby
increasing the probability that our experimental medicines will have the desired therapeutic effect, while cultivating connections with patient communities,
healthcare professionals, partners and colleagues to discover, develop and deliver potential therapies for genetically defined diseases, or GDDs.

Sale of Oncology Business to Servier Pharmaceuticals, LLC (Servier)

On March 31, 2021, we completed the sale of our oncology business to Servier Pharmaceuticals LLC, or Servier. The transaction included the sale of our
oncology business, including TIBSOVO®, our clinical-stage product candidates vorasidenib, AG-270 and AG-636, and our oncology research programs
for a payment of approximately $1.8 billion in cash at the closing, subject to certain adjustments, and a payment of $200 million in cash, if, prior to January
1, 2027, vorasidenib is granted new drug application, or NDA, approval from the U.S. Food and Drug Administration, or FDA, with an approved label that
permits vorasidenib’s use as a single agent for the adjuvant treatment of patients with Grade 2 glioma that have an isocitrate dehydrogenase 1 or 2 mutation
(and, to the extent required by such approval, the vorasidenib companion diagnostic test is granted an FDA premarket approval), as well as a royalty of 5%
of U.S. net sales of TIBSOVO® from the close of the transaction through loss of exclusivity, and a royalty of 15% of U.S. net sales of vorasidenib from the
first  commercial  sale  of  vorasidenib  through  loss  of  exclusivity.  Servier  also  acquired  our  co-commercialization  rights  for  Bristol  Myers  Squibb’s
IDHIFA®  and  the  right  to  receive  a  $25.0  million  potential  milestone  payment  under  our  prior  collaboration  agreement  with  Celgene  Corporation,  or
Celgene, and following the sale Servier is responsible for conducting certain clinical development activities within the IDHIFA® development program.

We recorded income from royalties of approximately $6.6 million on U.S. net sales of TIBSOVO® by Servier in the gain on sale of oncology business line
item within the consolidated statements of operations for the year ended December 31, 2021.

Business Overview

Genetically defined diseases

The  lead  product  in  our  genetically  defined  disease,  or  GDD,  portfolio,  PYRUKYND®  (mitapivat),  is  an  activator  of  both  wild-type  and  a  variety  of
mutant pyruvate kinase, or PK, enzymes, for the potential treatment of hemolytic anemias. In February 2022, the FDA approved PYRUKYND® for the
treatment of hemolytic anemia in adults with pyruvate kinase (PK) deficiency in the United States and we expect to commercially launch PYRUKYND®
in the first quarter of 2022. In June 2021, we submitted a marketing authorization application, or MAA, to the EMA for PYRUKYND® for the treatment of
adults  with  PK  deficiency  in  the  European  Union.  The  MAA  has  passed  validation,  and  the  regulatory  review  process  is  ongoing.  In  addition,  we  are
currently evaluating PYRUKYND® for the treatment of α- and β-thalassemia and sickle cell disease, or SCD, in the ongoing clinical trials described below
and we intend to evaluate PYRUKYND® in pediatric patients with PK deficiency in the planned clinical trials described below. We are also developing
AG-946,  a  novel,  next-generation  PK  activator,  for  the  potential  treatment  of  hemolytic  anemias  and  other  indications,  including  SCD  and  anemia
associated with low- to intermediate-risk myelodysplastic syndrome, or L-IR MDS.

In addition to the aforementioned development programs, we foster a productive research engine and are seeking to advance multiple novel, investigational
therapies  in  clinical  and  preclinical  development  in  our  focus  area  of  GDDs,  based  on  our  scientific  leadership  in  the  field  of  cellular  metabolism  and
adjacent areas of biology.

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With nearly 15 years of focused study in cellular metabolism, we have a deep understanding of this biology, which is involved in the healthy functioning of
nearly every system in the body. Building on this expertise, our focus on GDDs has enabled expansion of our research and promising biological insights
based on highly translatable work from murine and cell-based models recapitulating human disease. Our laboratory capabilities are specialized to enable
complex GDD studies.

Our approach to drug discovery involves collaboration across all parts of our research, development and commercial teams, and favors targets that may
impact an array of diseases or mutations, yielding a potential “pipeline within a mechanism”. We leverage these capabilities to identify under-researched
targets, validate these targets using genetic and chemical approaches, and advance them rapidly into and through drug discovery. We believe that we have
established state-of-the-art capabilities to study and drug metabolic targets including our ability to measure the activities of numerous metabolites in cells
or  tissues  in  a  high  throughput  fashion  and  measure  metabolic  fluxes.  This  refers  to  the  analysis  of  how  metabolites,  which  are  intermediates  or  small
molecule products of metabolism, accumulate or diminish as they are created or chemically altered by multiple networks of metabolic enzymes. Through
our  historic  efforts  to  drug  metabolic  enzymes  we  have  established  strong  capabilities  in  the  enzymology  and  structural  biology  of  metabolic  enzymes,
facilitating our drug discovery efforts.

We focus on the identification, validation, and drugging of targets with compelling patient selection biomarkers and robust pharmacodynamic readouts,
thus increasing the potential for establishing proof of concept early in clinical development, along with the potential for accelerated approval.

Our Strategy and Long-term Goals

As part of our long-term strategy, we have developed and articulated a strategic vision that delineates our expected evolution in light of our singular focus
on accelerating and expanding our GDD business. We aim to build a sustainable, multi-product company, based on our expertise in cellular metabolism and
adjacent biology, that creates differentiated, small molecule medicines for patients.

Our  five-year  vision  includes  (i)  obtaining  regulatory  approvals  for  PYRUKYND®  in  PK  deficiency,  thalassemia  and  SCD,  (ii)  advancing  at  least  five
internally discovered molecules in clinical development spanning at least ten indications, (iii) fostering a robust research pipeline enabling us to submit
investigational new drug, or IND, applications every 12-24 months, and (iv) achieving cash-flow positivity.

Our Core Values

Our  company’s  values  cultivate  an  environment  that  promotes  collaboration,  contribution,  engagement  and  high  regard  for  others’  points  of  view.  This
foundation helps our people push the boundaries of our science and create transformative medicines, which we believe will provide long-term benefits for
all our stakeholders. Our connections – with each other and with external parties – fuel the development of new therapies for the people who need them.
Our core values include:

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Aim High: We set the bar high for ourselves, and we keep working to raise it. At our core, we’re guided by a deep respect for the science and a
commitment always to act with the utmost integrity.

Come Together:  We  grow  supportive  relationships  with  patients  and  caregivers.  We  build  trusting  connections  with  collaborators.  Together,  we
make a bigger impact than we ever could alone.

Embrace Differences: Because opportunities and insights come from anywhere and anyone, we honor all voices and encourage honest dialogue. We
learn equally from success and failure, bringing an open mind and a flexible approach to everything we do.

Bring Your Whole Self: We know we make the biggest impact when each of us can contribute and lead in our own way.

Blaze New Trails: We ask the tough questions that can lead to groundbreaking scientific advances. We nurture a creative mindset and resourceful
approach that spark life-changing innovations for patients.

Cellular Metabolism

Cellular  metabolism  refers  to  the  set  of  life-sustaining  chemical  transformations  within  the  cells  of  living  organisms.  The  conversion  of  nutrients  into
energy via enzyme-catalyzed reactions allows organisms to grow and reproduce, maintain their structures, and respond to their environments. Additionally,
metabolites serve as key regulators of diverse aspects of cellular biology, and pharmacologic targeting of metabolism can therefore have disease-modifying
effects  in  a  wide  variety  of  pathologies.  The  chemical  reactions  of  metabolism  are  organized  into  metabolic  pathways,  in  which  one  chemical  is
transformed  through  a  series  of  steps  into  another  chemical,  by  a  sequence  of  enzymes.  Enzymes  catalyze  quick  and  efficient  reactions,  serve  as  key
regulators  of  metabolic  pathways,  and  respond  to  changes  in  the  cell’s  environment  or  signals  from  other  cells.  We  believe  our  deep  understanding  of
metabolic pathways within normal cells enables us to identify altered metabolic pathways within abnormal cells.

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Genetically defined diseases

GDDs range from a broad group of more than 600 rare diseases caused by mutations of single genes to conditions resulting from alterations in one or many
genes (polygenic diseases) that affect up to millions of patients worldwide. In these disorders, the defect of single or multiple genes leads to a deficient
expression or function in one or several gene products which collectively manifest in organ dysfunction. As these conditions are by nature congenital and
frequently hereditary, they are often detected either by genetic testing or phenotypic diagnosis in newborns or in early childhood. A typical course of many
such diseases is inexorable deterioration until death or significant irreversible life-long disability and/or suffering.

Many  of  these  diseases  carry  severe  or  life-threatening  features.  Within  this  disease  grouping,  a  disorder  is  considered  orphan  if  it  affects  fewer  than
200,000 people in the United States, or fewer than five per 10,000 people in France, Germany, Italy, Spain, United Kingdom, or the EU5. Many GDDs are
likely to be under-diagnosed given the lack of available therapies or diagnostics, the rarity of the condition, or limited understanding of how the disease
genetics relate to disease phenotype. Through the study of GDDs, and other conditions, it has been shown that small molecule therapies able to specifically
correct  genetic  deficiencies  and  their  associated  organ  dysfunction  may  have  application  in  conditions  that  arise  independent  of  patient  genetics  but  for
which  identical  organ  dysfunction  occurs.  For  example,  a  treatment  for  a  hereditary  hemolytic  anemia  may  find  direct  application  in  the  treatment  of  a
secondarily acquired hemolytic anemia.

Current treatment options for these disorders are generally limited. Severe and sustained diet modification or nutrient supplementation can be beneficial in
certain  GDDs.  Several  of  these  disorders,  from  a  group  known  as  lysosomal  storage  diseases,  have  been  treated  successfully  with  enzyme  replacement
therapy, or ERT, the therapeutic administration of a functional version of the defective enzyme. Examples of ERTs for lysosomal storage disorders include
Fabrazyme®  for  Fabry  disease,  Myozome®  for  Pompe  disease,  Cerezyme®  for  Gaucher  disease,  and  Elaprase®  for  Hunter  syndrome.  In  addition,
treatment  of  polygenic  conditions  such  as  achondroplasia  by  Vosoritide®  and  the  monogenic  condition,  spinal  muscular  atrophy  by  gene  therapy  with
Zolgensma® represent novel technologic approaches to addressing GDDs.

Most mutations driving GDDs are intracellular and not amenable to corrective treatment with enzyme replacement therapies. Novel technologic approaches
such as gene therapy are also being tested in a minority of conditions and is a technology with limited application based on cost, complexity and patient
selection  factors.  Despite  the  promising  progress  made  for  patients  with  a  small  group  of  these  diseases,  the  majority  of  patients  with  GDDs  have  few
therapeutic options, and the standard of care for many such conditions is palliative, meaning treatment of symptoms with no effect on underlying disease
mechanisms. Our goal is to develop mechanistically specific, small molecule approaches with the potential to have disease modifying and long-term rather
than palliative effects. We are taking a novel small molecule approach to correct the defects within diseased cells with a goal of developing transformative
medicines for patients.

We focus on GDDs that share the following common set of features:

• Genetic definition of single or multiple gene sets linked to a consistent and recognizable disease phenotype;

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severe  clinical  presentation  coupled  with  significant  unmet  medical  need  and  evidence  that  disease  damage  while  progressive  is  potentially
reversible;

sufficient patients to allow facile recruitment and statistical powering of prospective clinical trials; and

a rigorous validation of the target, based upon a detailed mutational, structural, cell biological and biochemical analysis, to determine if a small
molecule approach to correcting or significantly modifying the disease is both safe and feasible in newborn to elderly patients.

Our Development Programs

We believe that leveraging our core capabilities in cellular metabolism combined with our singular focus on GDDs has significantly enhanced our ability to
build  a  rich  and  sustainable  research  and  development  engine,  which  has  permitted  us  to  discover  new  therapeutic  approaches  and  multiple  proprietary
first-in-class orally available small molecules.

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The following summarizes our approved product and most advanced clinical product candidates as of February 17, 2022, each of which is described in
further detail below.

PK Activator Program

PK is the enzyme involved in the second to last reaction in glycolysis — the conversion of glucose into lactic acid. This enzyme has several tissue-specific
isoforms (PKR, PKL, PKM1 and PKM2). Pyruvate kinase-R, or PKR, is the isoform of PK that is present in red blood cells, or RBCs. Mutations in PKR
cause defects in RBC glycolysis and lead to a hematological GDD known as PK deficiency. Glycolysis is the only pathway available for RBCs to maintain
the production of adenosine triphosphate, or ATP, which is a form of chemical energy within cells. Accordingly, we believe that activation of mutant forms
of PKR can restore glycolytic pathway activity and increase RBC health in patients with PK deficiency, and activation of wild-type (non-mutated) PKR can
serve as an effective compensatory mechanism in hemolytic anemias such as thalassemia and SCD.

PK Deficiency

PK  deficiency  is  a  rare  genetic  disorder  and  disease  understanding  is  still  evolving.  We  estimate  that  the  prevalence  of  PK  deficiency  is  between
approximately 3,000 and 8,000 individuals in the United States and the EU5 and we believe that the

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disease  is  likely  under-diagnosed.  PK  deficiency  leads  to  a  shortened  life  span  for  RBCs  and  is  the  most  common  form  of  non-spherocytic  hemolytic
anemia in humans.

There is currently no known unique ethnic or geographic representation of the disease. The disease manifests by mild to severe forms of anemia caused by
the excessive premature destruction of RBCs. The chronic hemolysis can lead to long-term complications and comorbidities, regardless of the degree of the
anemia, often resulting in jaundice and lifelong conditions associated with chronic anemia and secondary complications. The precise mechanism for the
hemolysis  is  not  well  understood  but  is  thought  to  result  from  membrane  instability  secondary  to  the  metabolic  defect  caused  by  the  low  level  of  PKR
enzyme.  The  hemolysis  is  “extra-vascular”  in  that  the  RBCs  are  destroyed  in  small  capillaries  or  organs  and  do  not  spontaneously  break  open  in  the
circulation. PK deficiency is an autosomal recessive disease whereby all patients inherit two mutations, one from each parent. Children with the disease
produce PKR enzyme that has only a fraction of the normal level of activity (generally <50%). Current management strategies for PK deficiency, including
blood transfusion and splenectomy, are associated with both short- and long-term risks. More than 350 different mutations have been identified to date. As
a result, there are many different possible mutant combinations and no one clear mutational profile. The mutations observed in PK deficiency patients are
classified in two main categories. A missense mutation causes a single amino acid change in the protein, generally resulting in some functional protein in
the  RBCs. A  non-missense  mutation  is  any  mutation  other  than  a  missense  mutation,  generally  resulting  in  little  functional  protein  in  the  RBCs.  It  is
estimated that 58 percent of patients with PK deficiency have two missense mutations, 27 percent have one missense and one non-missense mutation, and
15  percent  have  two  non-missense  mutations.  Boston  Children’s  Hospital,  in  collaboration  with  us,  is  conducting  a  Natural  History  Study  to  better
understand  the  symptoms  and  complications  of  PK  deficiency,  identify  patients  and  treatment  centers,  and  capture  other  clinical  data,  including  genetic
information.  We  initiated  a  global  registry,  called  PEAK,  for  up  to  500  adult  and  pediatric  patients  with  PK  deficiency  in  the  first  quarter  of  2018  to
increase understanding of the long-term disease burden of this chronic hemolytic anemia.

Thalassemia

Thalassemia is a hereditary blood disorder in which mutations in the α- or β-globin chains of hemoglobin lead to globin chain precipitates and aggregates
that  disturb  the  RBC  membrane  and  induce  oxidative  stress,  leading  to  decreased  survival  of  RBC  precursors,  ineffective  erythropoiesis,  hemolysis  of
mature  RBCs,  and  anemia.  We  estimate  that  the  prevalence  of  thalassemia  is  between  18,000  and  23,000  individuals  in  the  United  States  and  EU5.  In
addition  to  anemia,  patients  with  thalassemia  can  experience  enlarged  spleen,  bone  deformities,  iron  overload,  fatigue,  and  infection.  Current  treatment
strategies for thalassemia include blood transfusion and bone marrow transplantation, as well as recently improved therapies such as Reblozyl® for the
treatment  of  thalassemia.  We  believe  that  the  activation  of  wild-type  PKR  may  increase  ATP  production  and  improve  red  cell  fitness  and  survival  of
thalassemic RBCs, by increasing the clearance globin chain aggregates through ATP-dependent proteolytic mechanisms.

Sickle Cell Disease

SCD is an inherited blood disorder caused by mutations in hemoglobin that enable the hemoglobin to form long polymeric chains under certain conditions
such  as  low  oxygenation,  or  deoxygenation.  Polymerization  of  this  irregular  hemoglobin  results  in  RBCs  taking  on  a  sickle  shape,  causing  them  to
aggregate and obstruct small blood vessels, restricting blood flow to organs resulting in pain, cell death and organ damage. We estimate that the prevalence
of  SCD  is  between  120,000  and  135,000  individuals  in  the  United  States  and  EU5.  RBC  deoxygenation  is  modulated  by  several  factors,  including  the
levels of 2,3-diphosphoglycerate, or 2,3-DPG, which is found to be elevated in sickle cell patient RBCs. Current treatment strategies focus on managing
and  preventing  acute  RBC  sickling,  and  include  hydroxyurea,  L-glutamine  and  blood  transfusions,  as  well  as  recently  approved  therapies  such  as
Adakveo®  and  Oxbryta®.  We  believe  that  activation  of  wild-type  PKR  in  patients  with  SCD  may  reduce  hemoglobin  polymerization  and  the  sickling
process by at least two mechanisms. Reducing the level of 2,3-DPG in RBCs would increase the oxygenation state of hemoglobin to reduce sickling, while
increasing the levels of ATP may improve RBC hydration status which would also inhibit the sickling process.

Low- to Intermediate-Risk MDS

MDS is a heterogeneous group of rare hematological malignancies characterized by dysfunctional hematopoiesis (or formation of blood cells) , progressive
cytopenia (or lower-than-normal number of blood cells) and an increased risk of progression to acute myeloid leukemia. The most common type of MDS is
L-IR MDS, but many existing therapies and therapies under development focus on high risk MDS. Among patients with L-IR MDS, which is less likely to
progress to acute myeloid leukemia, the primary concern is symptomatic anemia. We estimate that the prevalence of L-IR MDS in the United States is
approximately  50,000  individuals.  We  believe  that  activation  of  wild-type  PK  in  L-IR  MDS  patients  may  improve  deficient  PK  activity  in  MDS
erythrocytes. Current treatment options for L-IR MDS often require in-office visits and transfusions, and erythropoiesis stimulating agents and Reblozyl®
(luspatercept-aamt) are the only approved therapies to treat anemia in a subset of patients. Despite approved therapies in subsets of patients, L-IR MDS
associated anemia remains a disease with high unmet medical need.

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PYRUKYND® (mitapivat): First-in-Class PK Activator

We are developing PYRUKYND® for the treatment of PK deficiency and other hemolytic anemias such as thalassemia and SCD. PYRUKYND® is an
orally available small molecule and a potent activator of the wild-type and mutated PKR enzymes. To date, we have demonstrated in clinical trials that
treatment  with  PYRUKYND®  can  lead  to  durable  sustained  increases  in  hemoglobin  in  patients  with  amenable  mutations  in  the  PKR  gene  and  a
statistically significant and clinically meaningful reduction in transfusion burden in regularly transfused patients with PK deficiency, and we have observed
in clinical trials of PYRUKYND® durable improvements in hemoglobin concentration and markers of hemolysis and ineffective erythropoeiesis in both α-
and β- halassemia patients and reductions in 2,3-DPG and increases in ATP in SCD patients.

In February 2022, the FDA approved PYRUKYND® for the treatment of hemolytic anemia in adults with pyruvate kinase (PK) deficiency in the United
States.  In  June  2021,  we  submitted  a  marketing  authorization  application,  or  MAA,  to  the  EMA  for  the  treatment  of  adults  with  PK  deficiency  the
European Union. The MAA has passed validation, and the regulatory review process is ongoing. We have worldwide development and commercial rights
to PYRUKYND® and expect to fund the future development and commercialization costs related to this program. PYRUKYND® has been granted orphan
drug designation for the treatment of PK deficiency by the FDA and the EMA. Additionally, PYRUKYND® has received orphan drug designation from the
FDA  for  the  treatment  of  thalassemia  and  sickle  cell  disease.  We  have  built  our  US  commercial  infrastructure  to  support  the  commercial  launch  of
PYRUKYND in the US and continue to evaluate all options for the commercialization and continued development of PYRUKYND® outside of the United
States in order to maximize the benefit to patients and value to our shareholders, including through exploring potential partnership opportunities.

We are evaluating PYRUKYND® in the following clinical trials:

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ENERGIZE, a phase 3, double-blind, randomized, placebo-controlled multicenter study evaluating the efficacy and safety of PYRUKYND® as a
potential  treatment  for  adults  with  non-transfusion-dependent  α-  or  β-thalassemia,  defined  as  ≤5  RBC  units  during  the  24-week  period  before
randomization and no RBC transfusions ≤8 weeks before providing informed consent or during the screening period. The primary endpoint of the
trial  is  percentage  of  patients  with  hemoglobin  response,  defined  as  a  ≥1.0  g/dL  increase  in  average  hemoglobin  concentration  from  Week  12
through  Week  24  compared  with  baseline.  Secondary  endpoints  include  markers  of  hemolysis  and  ineffective  erythropoiesis,  as  well  as  patient-
reported outcome measures. This trial is enrolling patients, and we expect to enroll a meaningful portion of the patients by the end of 2022.

ENERGIZE-T, a phase 3, double-blind, randomized, placebo-controlled multicenter study evaluating the efficacy and safety of PYRUKYND® as a
potential treatment for adults with transfusion-dependent α- or β-thalassemia, defined as 6 to 20 RBC units transfused and ≤6-week transfusion-free
period  during  the  24-week  period  before  randomization.  The  primary  endpoint  of  the  trial  is  percentage  of  patients  with  transfusion  reduction
response, defined as a ≥50% reduction in transfused RBC units with a reduction of ≥2 units of transfused RBCs in any consecutive 12-week period
through  Week  48  compared  with  baseline.  Secondary  endpoints  include  additional  transfusion  reduction  measures  and  percentage  of  participants
with transfusion-independence. This trial is enrolling patients, and we expect to enroll a meaningful portion of the patients by the end of 2022.

RISE UP, a phase 2/3 study evaluating the efficacy and safety of PYRUKYND® in SCD patients who are 16 years of age or older, have had between
two and 10 sickle cell pain crises in the past 12 months, and have hemoglobin within the range of 5.5 to 10.5 g/dL during screening. The phase 2
portion of the trial, which has initiated, includes a 12-week randomized, placebo-controlled period in which participants will be randomized in a
1:1:1 ratio to receive 50 mg PYRUKYND® twice daily, 100 mg PYRUKYND® twice daily or matched placebo. The primary endpoints are
hemoglobin response, defined as ≥1 g/dL increase in average hemoglobin concentration from Week 10 through Week 12 compared to baseline, and
safety. These data will be used to establish a clear dosing paradigm for the phase 3 portion. The phase 3 portion includes a 52-week randomized,
placebo-controlled period in which participants will be randomized in a 2:1 ratio to receive the recommended PYRUKYND® dose level or placebo.
The primary endpoints are hemoglobin response, defined as ≥1 g/dL increase in average hemoglobin from baseline to Week 52, and annualized rate
of sickle cell pain crises. Participants who complete either the phase 2 or phase 3 portion will have the option to move into a 216-week open-label
extension period to continue to receive PYRUKYND®. The phase 2 portion of this trial is enrolling patients, and we expect to complete enrollment
in the phase 2 portion of the trial by the end of 2022.

An  extension  study  evaluating  the  long-term  safety,  tolerability  and  efficacy  of  treatment  with  PYRUKYND®  in  patients  from  ACTIVATE  and
ACTIVATE-T, our completed pivotal trials of PYRUKYND® in not regularly transfused and regularly transfused patients with PK deficiency.

An  extension  study  evaluating  the  long-term  safety,  tolerability  and  efficacy  of  treatment  with  PYRUKYND®  in  patients  from  DRIVE  PK,  our
completed global phase 2, first-in-patient, open-label safety and efficacy clinical trial of PYRUKYND® in adult, not regularly transfused patients
with PK deficiency.

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An extension study evaluating the safety, tolerability and efficacy of treatment with PYRUKYND® in patients from our completed phase 2, open-
label safety and efficacy clinical trial of PYRUKYND® in adults with not-transfusion-dependent α- and β-thalassemia.

In collaboration with the National Institutes of Health, or NIH, we are evaluating PYRUKYND® in a phase 1 trial in patients with SCD pursuant to
a cooperative research and development agreement. The core trial period has completed. The long-term extension study is ongoing. In June 2020,
clinical proof of concept was established based on a preliminary analysis of the data from this trial.

In collaboration with UMC Utrecht, or UMC, we are evaluating PYRUKYND® in patients with SCD pursuant to an investigator sponsored trial
agreement. The trial is ongoing and enrolling patients, although UMC experienced disruptions related to the COVID-19 pandemic.

We expect to initiate two phase 3 trials of PYRUKYND®, ACTIVATE-kids and ACTIVATE-kidsT, in not regularly transfused and regularly transfused
pediatric patients with PK deficiency in mid-2022.

AG-946: Novel, Next-Generation PK Activator

We  are  developing  AG-946,  a  novel,  next-generation  PKR  activator,  for  the  potential  treatment  of  hemolytic  anemias.  We  are  evaluating  AG-946,  in  a
phase 1 trial of AG-946 in healthy volunteers and in patients with SCD. The trial is currently enrolling healthy volunteers, and we expect to initiate the
SCD patient cohort of this trial in the first half of 2022. We expect to initiate a phase 2a study of AG-946 in adults with L-IR MDS by year-end 2022.

Intellectual Property

Our commercial success depends in part on our ability to obtain and maintain proprietary or intellectual property protection for our product candidates and
our core technologies, including novel biomarker and diagnostic discoveries, and other know-how, to operate without infringing on the proprietary rights of
others and to prevent others from infringing our proprietary or intellectual property rights. Our policy is to seek to protect our proprietary and intellectual
property position by, among other methods, filing U.S. and foreign patent applications related to our proprietary technology, inventions and improvements
that  are  important  to  the  development  and  implementation  of  our  business.  We  also  rely  on  confidential  information,  know-how  and  continuing
technological innovation to develop and maintain our proprietary and intellectual property position. We may also choose to rely on trade secrets to protect
certain aspects of our business that are not suitable or appropriate for patent protection.

We file, or may collaborate with third parties to file, patent applications directed to our key products and product candidates, including PYRUKYND® and
AG-946, in addition to related compounds and potential back-up compounds, in an effort to establish intellectual property positions to protect these new
chemical entities as well as methods of using these compounds in the treatment of diseases, formulations, solid state forms, and manufacturing processes.
We  may  also  seek  patent  protection  for  certain  biomarkers  that  may  be  useful  in  identifying  the  appropriate  patient  population  for  therapies  with  our
product candidates.

PK activator program

The  patent  portfolio  for  our  PK  activator  program  contains  issued  patents  and  pending  patent  applications  directed  to  compositions  of  matter  for
PYRUKYND®,  as  well  as  to  related  compounds,  various  solid  state  forms  of  PYRUKYND®,  compositions  of  matter  for  second  generation  PKR
activators, such as AG-946, as well as methods of use for these novel compounds. As of February 1, 2022, we owned approximately 9 issued U.S. patents
and 176 issued foreign patents, and have pending patent applications in the US and in various foreign jurisdictions. The patents that have issued or will
issue for our PK activator program will have a statutory expiration date of at least 2030 to 2040. Patent term adjustments or patent term extensions could
result in later expiration dates. In some cases, the term of a US patent can be shortened by the filing of a terminal disclaimer which operates to reduce the
term of a patent to that of an earlier expiring patent. The foreign issued patents and pending patent applications are in a number of jurisdictions, including
Argentina, Australia, Austria, Belgium, Brazil, Canada, China, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Ireland, Italy,
Japan,  Lebanon,  Lithuania,  Mexico,  the  Netherlands,  Norway,  Poland,  Portugal,  Romania,  Russia,  Saudi  Arabia,  Slovakia,  Slovenia,  Spain,  Sweden,
Switzerland, Turkey, and the United Kingdom. Prosecution is a lengthy process, during which the scope of the claims initially submitted for examination
by the U.S. Patent and Trademark Office, or USPTO, can be significantly narrowed by the time they issue, if they issue at all. We expect this could be the
case with respect to some of our pending patent applications referred to above.

Patent Term

The term of individual patents depends upon the legal term for patents in the countries in which they are obtained. In most countries, including the United
States, the patent term is 20 years from the earliest filing date of a non-provisional patent application, although term extensions may be available. In the
United States, a patent’s term may be lengthened by patent term

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adjustment, which compensates a patentee for administrative delays by the USPTO in examining and granting a patent, or may be shortened if a patent is
terminally  disclaimed  over  an  earlier  filed  patent.  The  term  of  a  patent  that  covers  a  drug  or  biological  product  may  also  be  eligible  for  patent  term
extension when FDA approval is granted, provided statutory and regulatory requirements are met. The extension of the term of foreign patents varies, in
accordance with local law. Although certain of the patents granted by the regulatory authorities of the EU may expire at specific dates, the terms of patents
granted in certain European countries may extend beyond such EU patent expiration date if we were to obtain a supplementary protection certificate. In
addition, because of the extensive time required for clinical development and regulatory review of a product candidate we may develop, it is possible that,
before  any  of  our  product  candidates  can  be  commercialized,  any  related  patent  may  expire  or  remain  in  force  for  only  a  short  period  following
commercialization, thereby reducing any advantage of any such patent.

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

Additional Considerations

As with other biotechnology and pharmaceutical companies, our ability to maintain and solidify our proprietary and intellectual property position for our
product,  product  candidates  and  technologies  will  depend  on  our  success  in  obtaining  effective  patent  claims  and  enforcing  those  claims  if  granted.
However, patent applications that we may file or license from third parties may not result in the issuance of patents. We also cannot predict the breadth of
claims  that  may  be  allowed  or  enforced  in  our  patents.  Any  issued  patents  that  we  may  receive  in  the  future  may  be  challenged,  invalidated  or
circumvented. For example, a third party can challenge the patentability of one or more of the claims of an issued patent in a post-grant proceeding before
the USPTO or a foreign patent office such as the European Patent Office, which can result in the loss of certain claims or the loss of an entire patent. In
addition, it is possible that a third party has filed a patent application in the United States, or abroad, that claims the same technology or chemical structures
that  are  claimed  in  our  own  patent  applications  or  patents.  In  such  cases,  we  may  have  to  participate  in  legal  proceedings  or  enter  into  a  licensing
arrangement, which could result in substantial costs to us, even if the eventual outcome is favorable to us. In addition to patent protection, we also rely
upon unpatented confidential information, including confidential technical information, know-how and continuing technological innovation to develop and
maintain our competitive position. We seek to protect our proprietary information, in part, by using confidentiality agreements with our collaborators, third-
party  service  providers,  scientific  advisors,  employees  and  consultants,  and  by  invention  assignment  agreements  with  our  employees.  We  also  have
agreements requiring assignment of inventions with selected consultants, scientific advisors and collaborators. The confidentiality agreements are designed
to protect our proprietary information and, in the case of agreements or clauses requiring invention assignment, to grant us ownership of technologies that
are developed through a relationship with a third party.

With  respect  to  our  proprietary  cellular  metabolism  technology  platform,  we  consider  confidential  information  and  know-how  related  to  our  cellular
metabolism technology platform to be our primary intellectual property in this space. Confidential information and know-how can be difficult to protect. In
particular, we anticipate that with respect to this technology platform, at least some of the technical information and know-how will, over time, become
known  within  the  industry  through  independent  development,  the  publication  of  journal  articles  describing  the  methodology,  and  the  movement  of
personnel skilled in the art from academic to industry scientific positions.

Competition

The  pharmaceutical  and  biotechnology  industries  are  characterized  by  rapidly  advancing  technologies,  intense  competition  and  a  strong  emphasis  on
proprietary products. While we believe that our technology, development experience and scientific knowledge provide us with competitive advantages, we
face potential competition from many different sources, including major pharmaceutical, specialty pharmaceutical and biotechnology companies, academic
institutions  and  governmental  agencies  and  public  and  private  research  institutions.  PYRUKYND®  and  any  product  candidates  that  we  successfully
develop and commercialize will compete with existing therapies and new therapies that may become available in the future.

We compete in the areas of pharmaceutical, biotechnology and other related markets that address GDDs. There are other companies working to develop
therapies in the field of GDDs, including divisions of large pharmaceutical companies and biotechnology companies of various sizes.

Our competitors include: Bristol-Myers Squibb Company, or BMS; BioMarin Pharmaceutical, Inc., or BioMarin; bluebird bio, Inc., or bluebird; Forma;
Merck & Co., Inc., or Merck; Novartis International AG, or Novartis; Pfizer, Inc., or Pfizer; Global Blood Therapeutics, or Global Blood; IMARA Inc., or
IMARA; Rocket Pharma LTD, or Rocket Pharma; Vertex Pharmaceuticals Incorporated, or Vertex, Emmaus Life Sciences, or Emmaus, Fibrogen, Inc., or
Fibrogen, and Geron Corporation, or Geron.

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The most common methods for treating GDD patients with PKU and hemolytic anemias are dietary restriction, dietary supplementation or replacement,
treatment of symptoms and complications, gene therapy, blood transfusions, organ transplant and enzyme replacement therapies. There are a number of
marketed  therapies  available  for  treating  patients  with  GDDs.  For  example,  recently  approved  treatments  for  thalassemia,  SCD,  low-risk  MDS  and
phenylketonuria  include  Reblozyl®  from  Merck  (formerly  Acceleron);  Revlimid®  from  BMS;  Lentiglobin®  from  bluebird;  Adakveo®  from  Novartis;
Oxbryta®  from  Global  Blood;  Kuvan®  and  Palynziq®  from  BioMarin  and  Endari®  from  Emmaus.  While  our  product  and  product  candidates  may
compete with existing medicines and other therapies, to the extent they are ultimately used in combination with or as an adjunct to these therapies, our
product or product candidates may not be competitive with them. In addition to currently marketed therapies, there are also a number of products that are
either  small  molecules,  enzyme  replacement  therapies  or  gene  therapies  in  various  stages  of  clinical  development  to  treat  GDDs.  For  example,  Rocket
Pharma  is  conducting  a  clinical  trial  of  a  gene  therapy  targeting  PK  deficiency,  Forma  is  developing  a  PKR  activator  for  the  treatment  of  hemolytic
anemias, including PK deficiency, thalassemia, SCD and MDS, Fibrogen is developing Roxadustat for the treatment of anemia in MDS patients; Geron is
developing  imetelstat  for  the  treatment  of  low-risk  MDS,  and  Vertex  is  developing  a  gene  therapy  targeting  SCD.  These  products  in  development  may
provide efficacy, safety, convenience and other benefits that are not provided by currently marketed therapies. As a result, they may provide competition for
any of our product or product candidates for which we obtain market approval.

Many of our competitors may have significantly greater financial resources and expertise in research and development, manufacturing, preclinical testing,
conducting clinical trials, obtaining regulatory approvals and marketing approved medicines than we do. Mergers and acquisitions in the pharmaceutical,
biotechnology  and  diagnostic  industries  may  result  in  even  more  resources  being  concentrated  among  a  smaller  number  of  our  competitors.  These
competitors also compete with us in recruiting and retaining qualified scientific and management personnel, and establishing clinical trial sites and patient
registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs. Smaller or early stage companies may
also prove to be significant competitors, particularly through collaborative arrangements with large and established companies.

The key competitive factors affecting the success of PYRUKYND® and any of our product candidates that we develop, if approved, are likely to be their
efficacy, safety, convenience, price, the effectiveness of companion diagnostics in guiding the use of related therapeutics where appropriate, the level of
generic competition and the availability of reimbursement from government and other third-party payors.

Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize medicines that are safer, more effective, have
fewer or less severe side effects, are more convenient or are less expensive than any medicines that we may develop. Our competitors also may obtain FDA
or other regulatory approval for their medicines more rapidly than we may obtain approval for ours, which could result in our competitors establishing a
strong market position before we are able to enter the market. In addition, our ability to compete may be affected in many cases by insurers or other third-
party  payors  seeking  to  encourage  the  use  of  generic  or  other  branded  medicines.  There  are  many  generic  medicines  currently  on  the  market  for  the
indications  that  we  are  pursuing,  and  additional  medicines  are  expected  to  become  available  on  a  generic  basis  over  the  coming  years.  We  expect  that
PYRKYND® and any of our product candidates that may receive marketing approval, we expect that they will be priced at a significant premium over
competitive generic medicines.

Manufacturing

We do not own or operate, and currently have no plans to establish, any manufacturing facilities. We currently rely, and expect to continue to rely, on third
parties for the manufacture of our product candidates for preclinical and clinical testing, as well as for commercial manufacture of PYRUKYND® and any
product  candidate  for  which  we  receive  marketing  approval.  To  date,  we  have  obtained  materials  for  PYRUKYND®  and  AG-946  for  our  ongoing  and
planned  clinical  testing  from  third-party  manufacturers.  Although  we  have  long-term  supply  arrangements  in  place  for  the  commercial  supply  of
PYRUKYND®,  we  primarily  obtain  our  supplies  from  these  manufacturers  on  a  purchase  order  basis.  Due  to  the  volatility  of  the  raw  material  supply
network globally, we have gained regulatory approval for redundant supply of raw materials, and have an ongoing program to ensure this risk mitigation
remains effective. We do not currently have arrangements in place for redundant supply for drug product, but maintain a broad safety stock program. As we
have  done  for  PYRUKYND®,  for  all  of  our  other  product  candidates  we  intend  to  identify  and  qualify  additional  manufacturers  to  provide  the  active
pharmaceutical ingredient and fill-and-finish services prior to submission of an NDA to the FDA.

PYRUKYND® and AG-946 are organic compounds of low molecular weight, generally called small molecules. They can be manufactured in reliable and
reproducible synthetic processes from readily available starting materials. The chemistry is amenable to scale-up and does not require unusual equipment in
the manufacturing process. We expect to continue to develop drug candidates that can be produced cost-effectively at contract manufacturing facilities.

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Government Regulation and Product Approvals

Government authorities in the United States, at the federal, state and local level, and in other countries and jurisdictions, including the EU, extensively
regulate,  among  other  things,  the  research,  development,  testing,  manufacture,  pricing,  quality  control,  approval,  packaging,  storage,  recordkeeping,
labeling,  advertising,  promotion,  distribution,  marketing,  post-approval  monitoring  and  reporting,  and  import  and  export  of  biopharmaceutical  products.
The  processes  for  obtaining  marketing  approvals  in  the  United  States  and  in  foreign  countries  and  jurisdictions,  along  with  compliance  with  applicable
statutes and regulations and other regulatory authorities, require the expenditure of substantial time and financial resources.

Approval and Regulation of Drugs in the United States

In the United States, drug products are regulated under the Federal Food, Drug and Cosmetic Act, or FDCA, and applicable implementing regulations and
guidance. The failure of an applicant to comply with the applicable regulatory requirements at any time during the product development process, including
non-clinical testing, clinical testing, the approval process or post-approval process, may result in delays to the conduct of a study, regulatory review and
approval and/or administrative or judicial sanctions. These sanctions may include, but are not limited to, the FDA’s refusal to allow an applicant to proceed
with clinical trials, refusal to approve pending applications, license suspension or revocation, withdrawal of an approval, warning letters, adverse publicity,
product  recalls,  product  seizures,  total  or  partial  suspension  of  production  or  distribution,  injunctions,  fines  and  civil  or  criminal  investigations  and
penalties brought by the FDA or Department of Justice, or DOJ, or other government entities, including state agencies.

An applicant seeking approval to market and distribute a new drug in the United States generally must satisfactorily complete each of the following steps
before the product candidate will be approved by the FDA:

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preclinical testing including laboratory tests, animal studies and formulation studies which must be performed in accordance with the FDA’s good
laboratory practice, or GLP, regulations and standards;

submission to the FDA of an IND for human clinical testing, which must become effective before human clinical trials may begin;

approval by an independent institutional review board, or IRB, representing each clinical site before each clinical trial may be initiated;

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

preparation  and  submission  to  the  FDA  of  a  NDA  for  a  drug  product  which  includes  not  only  the  results  of  the  clinical  trials,  but  also,  detailed
information  on  the  chemistry,  manufacture  and  quality  controls  for  the  product  candidate  and  proposed  labeling  for  one  or  more  proposed
indication(s);

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

satisfactory completion of FDA inspection of the manufacturing facility or facilities, including those of third parties, at which the product candidate
or components thereof are manufactured to assess compliance with current good manufacturing practices, or cGMP, requirements and to assure that
the facilities, methods and controls are adequate to preserve the product’s identity, strength, quality and purity;

satisfactory completion of any FDA audits of the non-clinical and clinical trial sites to assure compliance with GCP and the integrity of clinical data
in support of the NDA;

payment of user fees and securing FDA approval of the NDA to allow marketing of the new drug product; and

compliance  with  any  post-approval  requirements,  including  the  potential  requirement  to  implement  risk  evaluation  and  mitigation  strategies,  or
REMS, and the potential requirement to conduct any post-approval studies required by the FDA.

Preclinical Studies

Before an applicant begins testing a product candidate with potential therapeutic value in humans, the product candidate enters the preclinical testing stage.
Preclinical tests include laboratory evaluations of product chemistry, formulation 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 formulation of the compounds for testing must comply with federal regulations
and  requirements,  including  GLP  regulations  and  standards,  and  the  United  States  Department  of  Agriculture’s  Animal  Welfare  Act,  if  applicable.  The
results of the preclinical tests, together with manufacturing information and analytical data, are submitted to the FDA as part of an IND. Some long-term
preclinical testing, such as animal tests of reproductive adverse events and carcinogenicity, and long-term toxicity studies, may continue after the IND is
submitted.

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The IND and IRB Processes

An IND is an exemption from the FDCA that allows an unapproved product candidate to be shipped in interstate commerce for use in an investigational
clinical  trial  and  a  request  for  FDA  authorization  to  administer  such  investigational  product  to  humans.  Such  authorization  must  be  secured  prior  to
interstate shipment and administration of any product candidate that is not the subject of an approved NDA. In support of a request for an IND, applicants
must submit a protocol for each clinical trial and any subsequent protocol amendments must be submitted to the FDA as part of the IND. The FDA requires
a 30-day waiting period after the filing of each IND before clinical trials may begin. This waiting period is designed to allow the FDA to review the IND to
determine whether human research subjects will be exposed to unreasonable health risks. At any time during this 30-day period, or thereafter, the FDA may
raise concerns or questions about the conduct of the trials as outlined in the IND and impose a clinical or partial clinical hold. In this case, the IND sponsor
and the FDA must resolve any outstanding concerns before clinical trials can begin.

Following commencement of a clinical trial under an IND, the FDA may also place a clinical or partial clinical hold on that trial. A clinical hold is an order
issued by the FDA to the sponsor to delay a proposed clinical investigation or to suspend an ongoing investigation. A partial clinical hold is a delay or
suspension of only part of the clinical work requested under the IND. For example, a specific protocol or part of a protocol is not allowed to proceed, while
other protocols may do so. No more than 30 days after imposition of a clinical hold or partial clinical hold, the FDA will provide the sponsor a written
explanation of the basis for the hold. Following issuance of a clinical or partial clinical hold, an investigation may only resume after the FDA has notified
the sponsor that the investigation may proceed. The FDA will base that determination on information provided by the sponsor correcting the deficiencies
previously cited or otherwise satisfying the FDA that the investigation can proceed.

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
FDA IND requirements must be met unless waived. When a foreign clinical study is not conducted under an IND, the sponsor must ensure that the study
complies with certain regulatory requirements, including GCP requirements, of the FDA in order to use the study as support for an IND or application for
marketing approval. The GCP requirements encompass both ethical and data integrity standards for clinical studies. The FDA’s regulations are intended to
help ensure the protection of human subjects enrolled in non-IND foreign clinical studies, as well as the quality and integrity of the resulting data. They
further help ensure that non-IND foreign studies are conducted in a manner comparable to that required for IND studies.

In addition to the foregoing IND requirements, an IRB representing each institution participating in the clinical trial must review and approve the plan for
any clinical trial before it commences at that institution, and the IRB must conduct continuing review and reapprove the study at least annually. The IRB
must review and approve, among other things, the study protocol and informed consent information to be provided to study subjects. An IRB must operate
in compliance with FDA regulations. An IRB can suspend or terminate approval of a clinical trial at its institution, or an institution 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 patients.

Additionally, some trials are overseen by an independent group of qualified experts organized by the trial sponsor, known as a data safety monitoring board
or committee. This group provides authorization as to whether or not a trial may move forward at designated check points based on access that only the
group maintains to available data from the study. Suspension or termination of development during any phase of clinical trials can occur if it is determined
that  the  participants  or  patients  are  being  exposed  to  an  unacceptable  health  risk.  Other  reasons  for  suspension  or  termination  may  be  made  based  on
evolving business objectives and/or competitive climate.

Reporting Clinical Trial Results

Under the Public Health Service Act, sponsors of clinical trials of certain FDA-regulated products, including prescription drugs and biologics, are required
to  register  and  disclose  certain  clinical  trial  information  on  a  public  registry  (clinicaltrials.gov)  maintained  by  the  U.S.  National  Institutes  of  Health,  or
NIH. Information related to the product, patient population, phase of investigation, study sites and investigators and other aspects of the clinical trial is
made public as part of the registration of the clinical trial. The NIH and the FDA have recently signaled the government’s willingness to begin enforcing
these requirements against non-compliant clinical trial sponsors. The failure to submit clinical trial information to clinicaltrials.gov is also a prohibited act
under the FDCA with violations subject to potential civil monetary penalties of up to $10,000 for each day the violation continues. Violations may also
result in injunctions and/or criminal prosecution or disqualification from federal grants.

Expanded Access to an Investigational Drug for Treatment Use

Expanded  access,  sometimes  called  “compassionate  use,”  is  the  use  of  investigational  new  drug  products  outside  of  clinical  trials  to  treat  patients  with
serious or immediately life-threatening diseases or conditions when there are no comparable or satisfactory alternative treatment options. The rules and
regulations related to expanded access are intended to improve access

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to investigational drugs for patients who may benefit from investigational therapies. FDA regulations allow access to investigational drugs under an IND
by  the  company  or  the  treating  physician  for  treatment  purposes  on  a  case-by-case  basis  for:  individual  patients  (single-patient  IND  applications  for
treatment  in  emergency  settings  and  non-emergency  settings);  intermediate-size  patient  populations;  and  larger  populations  for  use  of  the  drug  under  a
treatment protocol or Treatment IND Application.

When considering an IND application for expanded access to an investigational product with the purpose of treating a patient or a group of patients, the
sponsor and treating physicians or investigators will determine suitability when all of the following criteria apply: patient(s) have a serious or immediately
life-threatening disease or condition, and there is no comparable or satisfactory alternative therapy to diagnose, monitor, or treat the disease or condition;
the potential patient benefit justifies the potential risks of the treatment and the potential risks are not unreasonable in the context or condition to be treated;
and the expanded use of the investigational drug for the requested treatment will not interfere initiation, conduct, or completion of clinical investigations
that could support marketing approval of the product or otherwise compromise the potential development of the product.

While  there  is  no  obligation  to  make  investigational  products  available  for  expanded  access,  sponsors  are  required  to  make  policies  for  evaluating  and
responding to requests for expanded access publicly available upon the earlier of initiation of a Phase 2 or Phase 3 clinical trial, or 15 days after the drug or
biologic receives designation as a breakthrough therapy, fast track product, or regenerative medicine advanced therapy.

In addition, the Right to Try Act, among other things, provides a federal framework for certain patients to access certain investigational new drug products
that have completed a Phase 1 clinical trial and are undergoing investigation for FDA approval. Under certain circumstances, eligible patients can seek
treatment without enrolling in clinical trials and without obtaining FDA permission under the FDA expanded access program. There is no obligation for a
drug manufacturer to make its drug products available to eligible patients as a result of the Right to Try Act, but the manufacturer must develop an internal
policy and respond to patient requests according to that policy.

Human Clinical Trials in Support of an NDA

Clinical  trials  involve  the  administration  of  the  investigational  product  candidate  to  human  subjects  under  the  supervision  of  a  qualified  investigator  in
accordance with GCP requirements which include, among other things, the requirement that all research subjects provide their informed consent in writing
before their participation in any clinical trial. Clinical trials are conducted under written clinical trial protocols detailing, among other things, the objectives
of the study, inclusion and exclusion criteria, the parameters to be used in monitoring safety and the effectiveness criteria to be evaluated.

Human clinical trials are typically conducted in three sequential phases, but the phases may overlap or be combined.

Phase 1  clinical  trials  are  initially  conducted  in  a  limited  population  to  test  the  product  candidate  for  safety,  including  adverse  effects,  dose  tolerance,
absorption, metabolism, distribution, excretion and pharmacodynamics in healthy humans or in patients. During Phase 1 clinical trials, information about
the investigational drug product’s pharmacokinetics and pharmacological effects may be obtained to permit the design of well-controlled and scientifically
valid Phase 2 clinical trials.

Phase 2 clinical trials are generally conducted in a limited patient population to identify possible adverse effects and safety risks, evaluate the efficacy of
the product candidate for specific targeted indications, and determine dose tolerance and optimal dosage. Multiple Phase 2 clinical trials may be conducted
by the sponsor to obtain information prior to beginning larger and more costly Phase 3 clinical trials. Phase 2 clinical trials are well controlled, closely
monitored and conducted in a limited patient population.

Phase 3  clinical  trials  proceed  if  the  Phase  2  clinical  trials  demonstrate  that  a  dose  range  of  the  product  candidate  is  potentially  effective  and  has  an
acceptable  safety  profile.  Phase  3  clinical  trials  are  undertaken  within  an  expanded  patient  population  to  further  evaluate  dosage,  provide  substantial
evidence of clinical efficacy, and further test for safety in an expanded and diverse patient population at multiple, geographically dispersed clinical trial
sites. The FDA may require more than one Phase 3 clinical trial to support approval of a product candidate. A well-controlled, statistically robust Phase 3
clinical  trial  may  be  designed  to  deliver  the  data  that  regulatory  authorities  will  use  to  decide  whether  or  not  to  approve,  and,  if  approved,  how  to
appropriately label a drug; such Phase 3 clinical trials are referred to as “pivotal.” A phase 2 clinical trial can be a “pivotal” trial if the design provides a
well-controlled and reliable assessment of clinical benefit, particularly in an area of unmet medical need.

A company’s designation of the phase of a trial is not necessarily indicative that the trial will be sufficient to satisfy the FDA requirements of that phase.

In  some  cases,  the  FDA  may  approve  an  NDA  for  a  product  candidate  but  require  the  sponsor  to  conduct  additional  clinical  trials  to  further  assess  the
product candidate’s safety and effectiveness after approval. Such post-approval trials are typically referred to as Phase 4 clinical trials. These trials are used
to gain additional experience from the treatment of a larger number of patients in the intended treatment group and to further document a clinical benefit in
the case of drugs approved under

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accelerated approval regulations. Failure to exhibit due diligence with regard to conducting Phase 4 clinical trials could result in withdrawal of approval for
products.

Progress reports detailing the results of clinical trials must be submitted at least annually to the FDA and more frequently if serious adverse events occur. In
addition, IND safety reports must be submitted to the FDA for any of the following: serious and unexpected suspected adverse reactions; findings from
other studies or animal or in vitro testing that suggest a significant risk in humans exposed to the product; and any clinically important increase in the case
of a serious suspected adverse reaction over that listed in the protocol or investigator brochure. Phase 1, Phase 2 and Phase 3 clinical trials may not be
completed successfully within any specified period, or at all. The FDA will typically inspect one or more clinical sites to assure compliance with GCP and
the integrity of the clinical data submitted.

Review and Approval of an NDA

In order to obtain approval to market a drug product in the United States, a marketing application must be submitted to the FDA that provides sufficient
data establishing the safety and efficacy of the proposed drug product for its intended indication. The application must include all relevant data available
from  pertinent  preclinical  and  clinical  trials,  including  negative  or  ambiguous  results  as  well  as  positive  findings,  together  with  detailed  information
relating to the product’s chemistry, manufacturing, controls and proposed labeling, among other things. Data can come from company-sponsored clinical
trials intended to test the safety and effectiveness of a use of a product, or from a number of alternative sources, including studies initiated by investigators.
To support marketing approval, the data submitted must be sufficient in quality and quantity to establish the safety and efficacy of the drug product to the
satisfaction of the FDA.

The NDA is a vehicle through which applicants formally propose that the FDA approve a new product for marketing and sale in the United States for one
or more indications. Every new drug product candidate must be the subject of an approved NDA before it may be commercialized in the United States.
Under federal law, the submission of most NDAs is subject to an application user fee, which for federal fiscal year 2022 is approximately $3.1 million. The
sponsor  of  an  approved  NDA  is  also  subject  to  an  annual  program  fee,  which  for  fiscal  year  2022  is  approximately  $369,000  per  product.  Certain
exceptions  and  waivers  are  available  for  some  of  these  fees,  such  as  an  exception  from  the  application  fee  for  products  with  orphan  designation  and  a
waiver for certain small businesses.

Following  submission  of  an  NDA,  the  FDA  conducts  a  preliminary  review  of  the  application  generally  within  60  calendar  days  of  its  receipt  and  must
inform the sponsor at that time or before whether the application is sufficiently complete to permit substantive review. The FDA may request additional
information rather than accept the application for filing. In this event, the application must be resubmitted with the additional information. The resubmitted
application 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 substantive
review. Under the goals and policies agreed to by the FDA under the Prescription Drug User Fee Act, or PDUFA, applications seeking approval of New
Molecular Entities, or NMEs, are meant to be reviewed within ten months from the date on which the FDA accepts the application for filing. The review
process and the PDUFA goal date may be extended by the FDA for three additional months to consider new information or clarification provided by the
applicant to address an outstanding deficiency identified by the FDA following the original submission.

Before approving an application, the FDA typically will inspect the facility or facilities where the product is or will be manufactured. These pre-approval
inspections may cover all facilities associated with an NDA submission, including component manufacturing, finished product manufacturing and control
testing laboratories. The FDA will not approve an application unless it determines that the manufacturing processes and facilities are in compliance with
cGMP  requirements  and  adequate  to  assure  consistent  production  of  the  product  within  required  specifications.  Under  the  FDA  Reauthorization  Act  of
2017, the FDA must implement a protocol to expedite review of responses to inspection reports pertaining to certain applications, including applications for
products in shortage or those for which approval is dependent on remediation of conditions identified in the inspection report.

In  addition,  as  a  condition  of  approval,  the  FDA  may  require  an  applicant  to  develop  a  REMS.  REMS  use  risk  minimization  strategies  beyond  the
professional labeling to ensure that the benefits of the product outweigh the potential risks. REMS could include medication guides, communication plans
for health care professionals, and elements to assure safe use, including special training or certification for prescribing or dispensing, dispensing only under
certain circumstances, special monitoring and the use of patent registries. To determine whether a REMS is needed, the FDA will consider the size of the
population likely to use the product, seriousness of the disease, expected benefit of the product, expected duration of treatment, seriousness of known or
potential adverse events and whether the product is a NME.

The FDA may refer an application for a novel product which presents difficult questions of safety or efficacy to an advisory committee or explain why such
referral was not made. Typically, an advisory committee is a panel of independent experts, including clinicians and other scientific experts, that reviews,
evaluates  and  provides  a  recommendation  as  to  whether  the  application  should  be  approved  and  under  what  conditions.  The  FDA  is  not  bound  by  the
recommendations of an advisory committee, but it considers such recommendations when making decisions.

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Fast Track, Breakthrough Therapy, Priority Review and Regenerative Advanced Therapy Designations

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  condition.  These  programs  are  referred  to  as  Fast  Track  designation,  Breakthrough  Therapy  designation,  priority
review designation and regenerative advanced therapy designation.

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Fast Track Designation. The FDA may designate a product for Fast Track review if it is intended, whether alone or in combination with one or more
other  products,  for  the  treatment  of  a  serious  or  life-threatening  disease  or  condition,  and  it  demonstrates  the  potential  to  address  unmet  medical
needs  for  such  a  disease  or  condition.  For  Fast  Track  products,  sponsors  may  have  greater  interactions  with  the  FDA  and  the  FDA  may  initiate
review of sections of a Fast Track product’s application before the application is complete. This rolling review process may be available if the FDA
determines, after preliminary evaluation of clinical data submitted by the sponsor, that a Fast Track product may be effective. However, the FDA’s
time period goal for reviewing a Fast Track application does not begin until the last section of the application is submitted. In addition, the Fast
Track designation may be withdrawn by the FDA if the FDA believes that the designation is no longer supported by data emerging in the clinical
trial process.

Breakthrough Therapy Designation. A product may be designated as a Breakthrough Therapy if it is intended, either alone or in combination with
one or more other products, to treat a serious or life-threatening disease or condition and preliminary clinical evidence indicates that the product may
demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints. The FDA may take certain actions with
respect to Breakthrough Therapies, including: holding meetings with the sponsor throughout the development process; providing timely 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.

Priority Review.  The  FDA  may  designate  a  product  for  priority  review  if  it  is  a  product  that  treats  a  serious  condition  and,  if  approved,  would
provide  a  significant  improvement  in  safety  or  effectiveness  when  compared  with  other  available  therapies.  Significant  improvement  may  be
illustrated by evidence of increased effectiveness in the treatment of a condition, elimination or substantial reduction of a treatment-limiting product
reaction,  documented  enhancement  of  patient  compliance  that  may  lead  to  improvement  in  serious  outcomes,  and  evidence  of  safety  and
effectiveness  in  a  new  subpopulation.  A  priority  designation  is  intended  to  direct  overall  attention  and  resources  to  the  evaluation  of  such
applications, and to shorten the FDA’s goal for review of a marketing application from ten months to six months.

Regenerative Advanced Therapy Designation. A product is eligible for regenerative advanced therapies designation if it is a regenerative medicine
therapy that is intended to treat, modify, reverse or cure a serious or life-threatening disease or condition, and preliminary clinical evidence indicates
that the product has the potential to address unmet medical needs for such disease or condition. The benefits of a regenerative advanced therapy
designation  include  early  interactions  with  FDA  to  expedite  development  and  review,  benefits  available  to  breakthrough  therapies,  potential
eligibility for priority review and accelerated approval based on surrogate or intermediate endpoints.

Accelerated Approval Pathway

Drug or biologic products studied for their safety and effectiveness in treating serious or life-threatening illnesses and that provide meaningful therapeutic
benefit over existing 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 condition and the availability or lack of alternative treatments. As a condition 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-marketing
clinical trials. In addition, the FDA currently requires as a condition for accelerated approval pre-approval of promotional materials.

The FDA’s Decision on an NDA

Based on its evaluation of the application and accompanying information, including the results of the inspection of the manufacturing facilities, the FDA
may issue an approval letter or a complete response letter. An approval letter authorizes commercial marketing of the product with specific prescribing
information for the approved indications. A complete response letter generally indicates that the review cycle is complete and outlines the deficiencies in
the submission and may require substantial additional testing or information in order for the FDA to reconsider the application. An applicant has one year
to respond to the deficiencies identified in the complete response letter. The FDA has committed to reviewing such resubmissions in two or six months
depending on the type of information included. Even with submission of this additional information, the FDA ultimately may decide that the application
does not satisfy the regulatory criteria for approval.

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If the FDA approves a new product, it may limit the approved indications for use of the product. The FDA may also require contraindications, warnings or
precautions  be  included  in  the  product  labeling,  require  post-approval  trials,  require  testing  and  surveillance  programs  to  monitor  the  product  after
commercialization, or impose other conditions, including distribution and use restrictions or other risk management mechanisms, including REMS,to help
ensure that the benefits of the product outweigh the potential risks. The FDA may prevent or limit further marketing of a product based on the results of
post-marketing  trials  or  surveillance  programs.  After  approval,  many  types  of  changes  to  the  approved  product,  such  as  adding  new  indications,
manufacturing changes and additional labeling claims, are subject to further testing requirements and FDA review and approval.

Under the Ensuring Innovation Act, signed into law in 2021, the FDA must publish action packages summarizing its decisions to approve new drugs within
30 days or approval of such drugs.

Post-Approval Regulation

If regulatory approval for marketing of a product or new indication for an existing product is obtained, the sponsor will be required to comply with all
regular post-approval regulatory requirements as well as any post-approval requirements that the FDA may have imposed as part of the approval process.
The sponsor will be required to report, among other things, certain adverse reactions and manufacturing problems to the FDA, provide updated safety and
efficacy  information  and  comply  with  requirements  concerning  advertising  and  promotional  labeling  requirements.  Manufacturers  and  certain  of  their
subcontractors are required to register their establishments with the FDA and certain state agencies, and are subject to periodic unannounced inspections by
the FDA and certain state agencies for compliance with ongoing regulatory requirements, including cGMP regulations. Accordingly, the sponsor and its
third-party  manufacturers  must  continue  to  expend  time,  money  and  effort  in  the  areas  of  production  and  quality  control  to  maintain  compliance  with
cGMP and other regulatory requirements.

A product may also be subject to official lot release, meaning that the manufacturer is required to perform certain tests on each lot of the product before it is
released for distribution. If the product is subject to official release, the manufacturer must submit samples of each lot, together with a release protocol
showing a summary of the history of manufacture of the lot and the results of all of the manufacturer’s tests performed on the lot, to the FDA. The FDA
may  in  addition  perform  certain  confirmatory  tests  on  lots  of  some  products  before  releasing  the  lots  for  distribution.  Finally,  the  FDA  will  conduct
laboratory research related to the safety, purity, potency and effectiveness of pharmaceutical products.

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

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restrictions on the marketing or manufacturing of the product, complete withdrawal of the product from the market or product recalls;

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

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

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

injunctions or the imposition of civil or criminal penalties.

The FDA strictly regulates the marketing, labeling, advertising and promotion of prescription drug products placed on the market. This regulation includes,
among  other  things,  standards  and  regulations  for  direct-to-consumer  advertising,  communications  regarding  unapproved  uses,  industry-sponsored
scientific  and  educational  activities,  and  promotional  activities  involving  the  Internet  and  social  media.  Promotional  claims  about  a  drug’s  safety  or
effectiveness are prohibited before the drug is approved. After approval, a drug product generally may not be promoted for uses that are not approved by
the FDA, as reflected in the product’s prescribing information. In the United States, health care professionals are generally permitted 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  practice  of  medicine.  However,  FDA
regulations impose rigorous restrictions on manufacturers’ communications, prohibiting the promotion of off-label uses. It may be permissible, under very
specific,  narrow  conditions,  for  a  manufacturer  to  engage  in  nonpromotional,  non-misleading  communication  regarding  off-label  information,  such  as
distributing scientific or medical journal information.

If a company is found to have promoted off-label uses, it may become subject to adverse public relations and administrative and judicial enforcement by
the FDA, the DOJ, or the Office of the Inspector General of the Department of Health and Human Services, as well as state authorities. This could subject a
company to a range of penalties that could have a significant commercial impact, including civil and criminal fines and agreements that materially restrict
the manner in which a company

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promotes or distributes drug products. The federal government has levied large civil and criminal fines against companies for alleged improper promotion,
and  has  also  requested  that  companies  enter  into  consent  decrees  or  permanent  injunctions  under  which  specified  promotional  conduct  is  changed  or
curtailed.

In addition, the distribution of prescription pharmaceutical products is subject to the Prescription Drug Marketing Act, or PDMA, and its implementing
regulations,  as  well  as  the  Drug  Supply  Chain  Security  Act,  or  DSCSA,  which  regulate  the  distribution  and  tracing  of  prescription  drug  samples  at  the
federal level, and set minimum standards for the regulation of drug distributors by the states. The PDMA, its implementing regulations and state laws limit
the  distribution  of  prescription  pharmaceutical  product  samples,  and  the  DSCSA  imposes  requirements  to  ensure  accountability  in  distribution  and  to
identify and remove counterfeit and other illegitimate products from the market.

Section 505(b)(2) NDAs

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

Section 505(b)(2) authorizes the FDA to approve an NDA based on safety and effectiveness data that were not developed by the applicant. NDAs filed
under Section 505(b)(2) may provide an alternate and potentially more expeditious pathway to FDA approval for new or improved formulations or new
uses of previously approved products. If the 505(b)(2) applicant can establish that reliance on the FDA’s previous approval is scientifically appropriate, the
applicant may eliminate the need to conduct certain preclinical or clinical studies of the new product. The FDA may also require companies to perform
additional studies or measurements to support the change from the approved product. The FDA may then approve the new drug candidate for all or some of
the label indications for which the referenced product has been approved, as well as for any new indication sought by the Section 505(b)(2) applicant.

Generic Drugs and Regulatory Exclusivity

In 1984, with 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 active ingredients as, and to be bioequivalent to, drugs previously approved by the FDA pursuant
to NDAs. Such previously approved drugs are known as the reference listed drugs, or RLDs. Abbreviated new drug applications, or ANDAs, for generic
drugs generally do not include preclinical and clinical data to demonstrate safety and effectiveness. Instead, the applicant may rely on the preclinical and
clinical testing previously conducted for the RLD.

To approve an ANDA, the FDA must find that the generic version is identical to the RLD, with respect to the active ingredients, the route of administration,
the dosage form, the strength of the drug and the conditions of use of the drug. At the same time, the FDA must also determine that the generic drug is
“bioequivalent” to the RLD. Under the statute, a generic drug is bioequivalent to an RLD if “the rate and extent of absorption of the drug do not show a
significant  difference  from  the  rate  and  extent  of  absorption  of  the  listed  drug.”  Upon  approval  of  an  ANDA,  the  FDA  indicates  whether  the  generic
product is “therapeutically equivalent” to the RLD in its publication “Approved Drug Products with Therapeutic Equivalence Evaluations,” also referred to
as the “Orange Book.” Physicians and pharmacists consider a therapeutic equivalent generic drug to be fully substitutable for the RLD.

Under the Hatch-Waxman Act, the FDA may not approve an ANDA or 505(b)(2) application until 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 entity, or NCE. For
the purposes of this provision an NCE, is a drug that contains no active moiety that has previously been approved by the FDA in any other NDA. An active
moiety is the molecule or ion responsible for the physiological or pharmacological action of the drug substance. In cases where such NCE exclusivity has
been granted, a generic or follow-on drug application may not be filed with the FDA until the expiration of five years unless the submission is accompanied
by a Paragraph IV certification, in which case the applicant may submit its application four years following the original product approval.

The  FDCA  also  provides  for  a  period  of  three  years  of  exclusivity  if  the  NDA  includes  reports  of  one  or  more  new  clinical  investigations,  other  than
bioavailability or bioequivalence studies, that were conducted by or for the applicant and are essential to the approval of the application. This three-year
exclusivity  period  often  protects  changes  to  a  previously  approved  drug  product,  such  as  new  indications,  dosage  forms,  route  of  administration,
combination of ingredients. Three-year exclusivity would be available for a drug product that contains a previously approved active moiety, provided the
statutory requirement for

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a  new  clinical  investigation  is  satisfied.  Unlike  five-year  NCE  exclusivity,  an  award  of  three-year  exclusivity  does  not  block  the  FDA  from  accepting
ANDAs or 505(b)(2) NDAs seeking approval for generic versions of the drug as of the date of approval of the original drug product; rather, this three-year
exclusivity  covers  only  the  conditions  of  use  associated  with  the  new  clinical  investigations  and,  as  a  general  matter,  does  not  prohibit  the  FDA  from
approving follow-on applications for drugs containing the original active ingredient.

Upon submission of an NDA or a supplement thereto, NDA sponsors are required to list with the FDA each patent with claims that cover the applicant’s
product  or  an  approved  method  of  using  the  product.  Upon  approval  of  a  new  drug,  each  of  the  patents  listed  by  the  NDA  sponsor  is  published  in  the
Orange Book. When an ANDA applicant files its application with the FDA, the applicant is required to certify to the FDA concerning any patents listed for
the reference product in the Orange Book. Specifically, the applicant must certify: (i) the required patent information has not been filed, (ii) the listed patent
has expired, (iii) the listed patent has not expired, but will expire on a particular date and approval is sought after patent expiration or (iv) the listed patent is
invalid, unenforceable or will not be infringed by the new product. To the extent that the Section 505(b)(2) applicant is relying on studies conducted for an
already approved product, the applicant is required to certify to the FDA concerning any patents listed for the approved product in the Orange Book to the
same extent that an ANDA applicant would.

A certification that the new product will not infringe the already approved product’s listed patents or that such patents are invalid or unenforceable is called
a Paragraph IV certification. If the applicant does not challenge the listed patents, the ANDA or 505(b)(2) NDA will not be approved until all the listed
patents claiming the referenced product have expired.

If  the  ANDA  applicant  or  the  505(b)(2)  applicant  has  provided  a  Paragraph  IV  certification  to  the  FDA,  the  applicant  must  also  send  notice  of  the
Paragraph IV certification to the NDA owner and patent holders once the ANDA or 505(b)(2) NDA has been accepted for filing by the FDA. The NDA
owner and patent holders may then initiate a patent infringement lawsuit in response to the notice of the Paragraph IV certification. The filing of a patent
infringement lawsuit within 45 days after the receipt of a Paragraph IV certification automatically prevents the FDA from approving the ANDA or 505(b)
(2) NDA until the earlier of 30 months after the receipt of the Paragraph IV notice, expiration of the patent, or a decision in the infringement case that is
favorable to the ANDA or 505(b)(2) applicant.

Pediatric Studies

Under the Pediatric Research Equity Act of 2003, or PREA, an NDA or supplement thereto must contain data that are adequate to assess the safety and
effectiveness of the product for the claimed indications in all relevant pediatric subpopulations, and to support dosing and administration for each pediatric
subpopulation for which the product is safe and effective. Sponsors must also submit pediatric study plans prior to the assessment data. Those plans must
contain an outline of the proposed pediatric study or studies the applicant plans to conduct, including study objectives and design, any deferral or waiver
requests and other information required by regulation. The applicant, the FDA, and the FDA’s internal review committee must then review the information
submitted, consult with each other and agree upon a final plan. The FDA or the applicant may request an amendment to the plan at any time.

For drugs intended to treat a serious or life-threatening disease or condition, the FDA must, upon the request of an applicant, meet to discuss preparation of
the initial pediatric study plan or to discuss deferral or waiver of pediatric assessments. In addition, 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  meeting  for  serious  or  life-
threatening diseases and by no later than ninety (90) days after the FDA’s receipt of the study plan.

The FDA may, on its own initiative or at the request of the applicant, grant deferrals for submission of some or all pediatric data until after approval of the
product for use in adults, or full or partial waivers from the pediatric data requirements. A deferral may be granted for several reasons, including a finding
that the product or therapeutic candidate is ready for approval for use in adults before pediatric trials are complete or that additional safety or effectiveness
data needs to be collected before the pediatric trials begin. Unless otherwise required by regulation, the pediatric data requirements do not apply to products
with orphan designation, although FDA has recently taken steps to limit what it considers abuse of this statutory exemption in PREA by announcing that it
does  not  intend  to  grant  any  additional  orphan  drug  designations  for  rare  pediatric  subpopulations  of  what  is  otherwise  a  common  disease.  The  FDA
maintains a list of diseases that are exempt from the requirements of the PREA.

Pediatric Exclusivity

Pediatric exclusivity is another type of non-patent marketing exclusivity in the United States and, if granted, provides for the attachment of an additional
six months of marketing protection to the term of any existing 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 written request from the FDA for such data. The data
do  not  need  to  show  the  product  to  be  effective  in  the  pediatric  population  studied;  rather,  if  the  clinical  trial  is  deemed  to  fairly  respond  to  the  FDA’s
request, the additional protection is granted. If reports of requested pediatric studies are submitted to and accepted by the FDA within the statutory time
limits, whatever statutory or regulatory periods of exclusivity or patent protection cover the product are extended

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by  six  months.  This  is  not  a  patent  term  extension,  but  it  effectively  extends  the  regulatory  period  during  which  the  FDA  cannot  approve  another
application. With regard to patents, the six-month pediatric exclusivity period will not attach to any patents for which a generic (ANDA or 505(b)(2) NDA)
applicant submitted a Paragraph IV certification, unless the NDA sponsor or patent owner first obtains a court determination that the patent is valid and
infringed by a proposed generic product.

Orphan Drug Designation and Exclusivity

Under the Orphan Drug Act, the FDA may designate a drug product as an “orphan drug” if it is intended to treat a rare disease or condition, generally
meaning that it affects fewer than 200,000 individuals in the United States, or more in cases in which there is no reasonable expectation that the cost of
developing and making a product available in the United States for treatment of the disease or condition will be recovered from sales of the product. A
company  must  seek  orphan  drug  designation  before  submitting  an  NDA  for  the  candidate  product.  If  the  request  is  granted,  the  FDA  will  disclose  the
identity  of  the  therapeutic  agent  and  its  potential  use.  Orphan  drug  designation  does  not  shorten  the  PDUFA  goal  dates  for  the  regulatory  review  and
approval process, although it does convey certain advantages such as tax benefits and exemption from the PDUFA application fee.

If a product with orphan designation receives the first FDA approval for the disease or condition for which it has such designation, or for a select indication
or use within the rare disease or condition for which it was designated, the product generally will receive orphan drug exclusivity. Orphan drug exclusivity
means that the FDA may not approve another sponsor’s marketing application for the same drug for the same condition for seven years, except in certain
limited circumstances. Orphan exclusivity does not block the approval of a different product for the same rare disease or condition, nor does it block the
approval  of  the  same  product  for  different  conditions.  If  a  drug  designated  as  an  orphan  drug  ultimately  receives  marketing  approval  for  an  indication
broader than what was designated in its orphan drug application, it may not be entitled to exclusivity. Orphan drug exclusivity will not bar approval of
another product under certain circumstances, including if a subsequent product with the same drug for the same condition is shown to be clinically superior
to the approved product on the basis of greater efficacy or safety, or providing a major contribution to patient care, or if the company with orphan drug
exclusivity is not able to meet market demand. This is the case despite an earlier court opinion holding that the Orphan Drug Act unambiguously required
the FDA to recognize orphan exclusivity regardless of a showing of clinical superiority. The requirement for a product to show clinical superiority applies
to product candidates that received orphan drug designation before the enactment of amendments to the FDCA in 2017 but have not been approved by the
FDA.

It  is  unclear  how  the  FDA  will  implement  a  recent  court  decision  concluding  that  orphan  drug  exclusivity  applies  to  the  entire  designated  disease  or
condition rather than the “indication or use”.

Patent Term Restoration and Extension

A patent claiming a new drug product, its method of use or its method of manufacture may be eligible for a limited patent term extension under the Hatch-
Waxman Act, which permits a patent restoration of up to five years for patent term lost during product development and the FDA regulatory review. The
restoration period granted on a patent covering a product is typically one-half the time between the effective date of when a clinical investigation involving
human  beings  has  begun  and  the  submission  date  of  an  application  for  approval,  plus  the  time  between  the  submission  date  of  an  application  and  the
ultimate approval date. Patent term restoration cannot be used to extend the remaining term of a patent past a total of 14 years from the product’s approval
date. Only one patent applicable to an approved product is eligible for the extension, and the application for the extension must be submitted prior to the
expiration of the patent in question. A patent that covers multiple products for which approval is sought can only be extended in connection with one of the
approvals. The USPTO reviews and approves the application for any patent term extension or restoration in consultation with the FDA.

Health Care Law and Regulation

Health  care  providers  and  third-party  payors  play  a  primary  role  in  the  recommendation  and  prescription  of  drug  products  that  are  granted  marketing
approval.  Arrangements  with  providers,  consultants,  third-party  payors  and  customers  are  subject  to  broadly  applicable  fraud  and  abuse,  anti-kickback,
false  claims  laws,  patient  privacy  laws  and  regulations  and  other  health  care  laws  and  regulations  that  may  constrain  business  and/or  financial
arrangements. Restrictions under applicable federal and state health care laws and regulations, include the following:

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

the federal civil and criminal false claims laws, including the civil False Claims Act, and civil monetary penalties laws, which prohibit individuals or
entities from, among other things, knowingly presenting, or causing to be presented, to the federal government, claims for payment that are false,
fictitious or fraudulent or knowingly making, using or causing to

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made or used a false record or statement to avoid, decrease or conceal an obligation to pay money to the federal government;

the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which created additional federal criminal laws that prohibit,
among other things, knowingly and willfully executing, or attempting to execute, a scheme to defraud any health care benefit program or making
false statements relating to health care matters;

HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, and their respective implementing regulations,
including the Final Omnibus Rule published in January 2013, which impose obligations, including mandatory contractual terms, with respect to
safeguarding the privacy, security and transmission of individually identifiable health information;

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 connection with the delivery of or payment for health care benefits, items or services;

the Foreign Corrupt Practices 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, under the Patient Protection and Affordable Care Act,
as amended by the Health Care Education Reconciliation Act, or the ACA, which requires certain manufacturers of drugs, devices, biologics and
medical supplies to report annually to the Centers for Medicare & Medicaid Services, or CMS, within the United States Department of Health and
Human Services, information related to payments and other transfers of value made by that entity to physicians, other healthcare providers and
teaching hospitals, as well as ownership and investment interests held by physicians, other healthcare providers and their immediate family
members; and

analogous state and foreign laws and regulations, such as state anti-kickback and false claims laws, which may apply to health care items or services
that are reimbursed by non-government third-party payors, including private insurers.

Further, some state laws require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant
compliance guidance promulgated by the federal government in addition to requiring manufacturers to report information related to payments to physicians
and  other  health  care  providers  or  marketing  expenditures.  Additionally,  some  state  and  local  laws  require  the  registration  of  pharmaceutical  sales
representatives in the jurisdiction. State and foreign laws also govern the privacy and security of health information in some circumstances, many of which
differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.

Violations of these laws are punishable by criminal and/or civil sanctions, including, in some instances, exclusion from participation in federal and state
health care programs, such as Medicare and Medicaid.

Pharmaceutical Insurance Coverage and Health Care Reform

In  the  United  States  and  other  countries,  patients  who  are  prescribed  treatments  for  their  conditions  and  providers  performing  the  prescribed  services
generally  rely  on  third-party  payors  to  reimburse  all  or  part  of  the  associated  health  care  costs.  Significant  uncertainty  exists  as  to  the  coverage  and
reimbursement  status  of  products  approved  by  the  FDA  and  other  government  authorities.  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 United States such as Medicare and
Medicaid, commercial health insurers and managed care organizations, provide coverage and establish adequate reimbursement levels for the product. The
process for determining whether a payor will provide coverage for a product may be separate from the process for setting 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-effectiveness 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 particular
indication.

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-effectiveness of the product, in addition to the costs required to obtain
FDA or other comparable marketing approvals. Nonetheless, product candidates may not be considered medically necessary or cost effective. A decision
by a third-party payor not to cover a product could reduce physician utilization once the product is approved and have a material adverse effect on sales,
results  of  operations  and  financial  condition.  Additionally,  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  determination  to  provide  coverage  for  a  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.

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The containment of health care costs also has become a priority of federal, state and foreign governments, and the prices of products have been a focus in
this  effort.  Governments  have  shown  significant  interest  in  implementing  cost-containment  programs,  including  price  controls,  restrictions  on
reimbursement  and  requirements  for  substitution  of  generic  products.  Adoption  of  price  controls  and  cost-containment  measures,  and  adoption  of  more
restrictive policies in jurisdictions with existing 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 time. Even if favorable coverage and reimbursement status is attained
for one or more products for which a company or its collaborators receive marketing approval, less favorable coverage policies and reimbursement rates
may be implemented in the future.

There have been a number of federal and state proposals during the last few years regarding the pricing of pharmaceutical and biopharmaceutical products,
limiting coverage and reimbursement for drugs, biologics and other medical products, government control and other changes to the health care system in
the United States.

In March 2010, the United States Congress enacted the ACA, which, among other things, includes changes to the coverage and payment for drug products
under government health care programs. Among the provisions of the ACA of importance to our potential product candidates are:

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an annual, nondeductible fee on any entity that manufactures or imports specified branded prescription drugs and biologic agents, apportioned
among these entities according to their market share in certain government healthcare programs;

expansion of eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to certain individuals with
income at or below 133% of the federal poverty level, thereby potentially increasing a manufacturer’s Medicaid rebate liability;

expanded manufacturers’ rebate liability under the Medicaid Drug Rebate Program by increasing the minimum rebate for both branded and generic
drugs, and revising the definition of “average manufacturer price,” or AMP, for calculating and reporting Medicaid drug rebates on outpatient
prescription drug prices;

addressed a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are
inhaled, infused, instilled, implanted or injected;

expanded the types of entities eligible for the 340B drug discount program;

established the Medicare Part D coverage gap discount program by requiring manufacturers to provide a 50% (and 70% starting January 1, 2019)
point-of-sale-discount off the negotiated price of applicable brand drugs to eligible beneficiaries during their coverage gap period as a condition for
the manufacturers’ outpatient drugs to be covered under Medicare Part D; and

a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness research, along
with funding for such research.

Other legislative changes have been proposed and adopted in the United States since the ACA was enacted. In August 2011, the Budget Control Act of
2011,  among  other  things,  created  measures  for  spending  reductions  by  Congress.  A  Joint  Select  Committee  on  Deficit  Reduction,  tasked  with
recommending a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, was unable to reach required goals, thereby triggering
the legislation’s automatic reduction to several government programs. This includes aggregate reductions of Medicare payments to providers up to 2% per
fiscal  year,  which  will  remain  in  effect  through  2031.  However,  pursuant  to  the  Coronavirus  Aid,  Relief  and  Economic  Security  Act  and  subsequent
legislation, these Medicare reductions are suspended through the end of March 2022 and from April 2022 through June 2022, a 1% cut will be in effect,
with the full 2% cut resuming thereafter.

Since enactment of the ACA, there have been, and continue to be, numerous legal challenges and Congressional actions to repeal and replace provisions of
the law. For example, with enactment of the Tax Cuts and Jobs Act of 2017 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  effective  in  2019.  On  November  10,  2020,  the
Supreme Court heard oral arguments as to whether the individual mandate portion of the ACA is an essential and inseverable feature of the ACA, and
therefore because the mandate was repealed as part of the Tax Cuts and Jobs Act of 2017, the remaining provisions of the ACA are invalid as well. On June
17,  2021,  the  Supreme  Court  dismissed  this  action  after  finding  that  the  plaintiffs  did  not  have  standing  to  challenge  the  ACA’s  minimum  essential
coverage provision at issue in the case. Litigation and legislation over the ACA are likely to continue, with unpredictable and uncertain results.

The  Trump  Administration  also  took  executive  actions  to  undermine  or  delay  implementation  of  the  ACA,  including  directing  federal  agencies  with
authorities and responsibilities under the ACA to waive, defer, grant exemptions from, or delay the implementation of any provision of the ACA that would
impose a fiscal or regulatory burden on states, individuals, healthcare providers, health insurers, or manufacturers of pharmaceuticals or medical devices.
On January 28, 2021, however, President

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Biden rescinded those orders issued a new executive order which directs federal agencies to reconsider rules and other policies that limit Americans’ access
to health care, and consider actions that will protect and strengthen that access. Under this executive order, federal agencies are directed to re-examine:
policies  that  undermine  protections  for  people  with  pre-existing  conditions,  including  complications  related  to  COVID-19;  demonstrations  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.

The costs of prescription pharmaceuticals have also been the subject of considerable discussion in the United States. To date, there have been several recent
U.S. congressional inquiries, as well as proposed and enacted state and federal legislation designed to, among other things, bring more transparency to drug
pricing, review the relationship between pricing and manufacturer patient programs, and reduce the costs of drugs under Medicare and Medicaid. To those
ends, President Trump issued several executive orders intended to lower the costs of prescription drug products. Certain of these orders are reflected in
recently  promulgated  regulations,  including  an  interim  final  rule  implementing  a  most  favored  nation  model  for  prices  that  would  tie  Medicare  Part  B
payments for certain physician-administered pharmaceuticals to the lowest price paid in other economically advanced countries, effective January 1, 2021,
but such rule has been subject to a nationwide preliminary injunction. In December 2021, the CMS issued a final rule to rescind it. With issuance of this
rule, CMS stated that it will explore all options to incorporate value into payments for Medicare Part B pharmaceuticals and improve beneficiaries' access
to evidence-based care.

In November 2020, the Department of Health and Human Services, or HHS, finalized a regulation removing safe harbor protection for price reductions
from  pharmaceutical  manufacturers  to  plan  sponsors  under  Part  D,  either  directly  or  through  pharmacy  benefit  managers,  unless  the  price  reduction  is
required  by  law.  The  implementation  of  the  rule  has  been  delayed  by  the  Biden  administration  from  January  1,  2022  to  January  1,  2023  in  response  to
ongoing litigation. The rule also creates a new safe harbor for price reductions reflected at the point-of-sale, as well as a new safe harbor for certain fixed
fee arrangements between pharmacy benefit managers and manufacturers, the implementation of which have also been delayed by the Biden administration
until  January  1,  2023.  In  addition,  in  response  to  an  executive  order  from  President  Biden,  the  HHS  recently  released  a  plan  to  reduce  pharmaceutical
prices.

At the state level, individual states are increasingly aggressive in passing legislation and implementing regulations designed to control pharmaceutical and
biological  product  pricing,  including  price  or  patient  reimbursement  constraints,  discounts,  restrictions  on  certain  product  access  and  marketing  cost
disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. For example, HHS
and the FDA published a final rule allowing states and other entities to develop a Section 804 Importation Program, or SIP, to import certain prescription
drugs from Canada into the United States. The final rule is currently the subject of ongoing litigation, but at least six states (Vermont, Colorado, Florida,
Maine,  New  Mexico  and  New  Hampshire)  have  passed  laws  allowing  for  importation  from  Canada  with  the  intent  of  developing  SIPs  for  review  and
approval  by  the  FDA.  A  number  of  states  have  also  required  drug  manufacturers  and  other  entities  in  the  drug  supply  chain,  including  health  carriers,
pharmacy  benefit  managers  and  wholesale  distributors,  to  disclose  information  about  pricing  of  pharmaceuticals.  In  addition,  regional  health  care
authorities  and  individual  hospitals  are  increasingly  using  bidding  procedures  to  determine  what  pharmaceutical  products  and  which  suppliers  will  be
included in their prescription drug and other health care programs. These measures could reduce the ultimate demand for our products, once approved, or
put pressure on our product pricing. We expect that additional 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 additional pricing pressures.

Review and Approval of Medicinal Products in the European Union

In order to market any product outside of the United States, a company must also comply with numerous and varying regulatory requirements of other
countries and jurisdictions regarding quality, safety and efficacy, and governing, among other things, clinical trials, marketing authorization, commercial
sales and distribution of products. Whether or not it obtains FDA approval for a product, an applicant will need to obtain the necessary approvals by the
comparable  non-U.S.  regulatory  authorities  before  it  can  commence  clinical  trials  or  marketing  of  the  product  in  those  countries  or  jurisdictions.
Specifically, the process governing approval of medicinal products in the EU generally follows the same lines as in the United States. It entails satisfactory
completion  of  preclinical  studies  and  adequate  and  well-controlled  clinical  trials  to  establish  the  safety  and  efficacy  of  the  product  for  each  proposed
indication. It also requires the submission to the relevant competent authorities of an MAA and granting of a marketing authorization by these authorities
before the product can be marketed and sold in the EU.

Clinical Trial Approval

The  Clinical  Trials  Directive  2001/20/EC,  the  Directive  2005/28/EC  on  GCP  and  the  related  national  implementing  provisions  of  the  individual  EU
Member  States  govern  the  system  for  the  approval  of  clinical  trials  in  the  EU.  Under  this  system,  an  applicant  must  obtain  prior  approval  from  the
competent national authority of the EU Member States in which the clinical trial

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is  to  be  conducted.  Furthermore,  the  applicant  may  only  start  a  clinical  trial  at  a  specific  study  site  after  the  competent  ethics  committee  has  issued  a
favorable  opinion.  The  clinical  trial  application  must  be  accompanied  by,  among  other  documents,  an  investigational  medicinal  product  dossier  (the
Common Technical Document) with supporting information prescribed by Directive 2001/20/EC, Directive 2005/28/EC, where relevant the implementing
national provisions of the individual EU Member States and further detailed in applicable guidance documents.

In  April  2014,  the  Clinical  Trial  (Regulation,  (EU))  No  536/2014  was  adopted.  The  new  Clinical  Trial  Regulation  aims  to  simplify  and  streamline  the
approval of clinical trials in the EU. The main characteristics of the regulation include: a streamlined application procedure via a single entry point, the EU
Portal and Database; a single set of documents to be prepared and submitted for the application as well as simplified reporting procedures for clinical trial
sponsors;  and  a  harmonized  procedure  for  the  assessment  of  applications  for  clinical  trials,  which  is  divided  in  two  parts.  Part  I  is  assessed  by  the
competent  authorities  of  all  EU  Member  States  in  which  an  application  for  authorization  of  a  clinical  trial  has  been  submitted,  or  Concerned  Member
States.  Part  II  is  assessed  separately  by  each  Concerned  Member  State.  Strict  deadlines  have  been  established  for  the  assessment  of  clinical  trial
applications. The role of the relevant ethics committees in the assessment procedure will continue to be governed by the national law of the Concerned
Member State. However, overall related timelines will be defined by the Clinical Trial Regulation.

The  Clinical  Trial  Regulation  came  into  application  on  January  31,  2022  and  is  directly  applicable  in  all  the  EU  Member  States,  repealing  the  current
Clinical  Trials  Directive  2001/20/EC.  Conduct  of  all  clinical  trials  performed  in  the  EU  were  bound  by  previously  applicable  provisions  until  the  new
Clinical  Trial  Regulation  became  applicable.  If  a  clinical  trial  continues  for  more  than  three  years  from  the  day  on  which  the  Clinical  Trial  Regulation
became applicable, the Clinical Trial Regulation will begin to apply to the clinical trial as of the time of its effectiveness.

Parties conducting certain clinical trials must, as in the United States, post clinical trial information in the EU at the EudraCT website:
https://eudract.ema.europa.eu.

PRIME Designation in the EU

In March 2016, the EMA launched an initiative to facilitate development of product candidates in indications, often rare, for which few or no therapies
currently  exist.  The  priority  medicines,  or  PRIME,  scheme  is  intended  to  encourage  drug  development  in  areas  of  unmet  medical  need  and  provides
accelerated assessment of products representing substantial innovation reviewed under the centralized procedure. Products from small- and medium-sized
enterprises  may  qualify  for  earlier  entry  into  the  PRIME  scheme  than  larger  companies.  Many  benefits  accrue  to  sponsors  of  product  candidates  with
PRIME designation, including but not limited to, early and proactive regulatory dialogue with the EMA, frequent discussions on clinical trial designs and
other development program elements, and accelerated marketing authorization application assessment once a dossier has been submitted. Importantly, a
dedicated  Agency  contact  and  rapporteur  from  the  Committee  for  Human  Medicinal  Products,  or  CHMP,  or  Committee  for  Advanced  Therapies  are
appointed early in the PRIME scheme facilitating increased understanding of the product at EMA’s Committee level.

Marketing Authorization

To obtain a marketing authorization for a product under EU regulatory systems, an applicant must submit an MAA either under a centralized procedure
administered  by  the  EMA,  or  one  of  the  procedures  administered  by  competent  authorities  in  the  EU  Member  States,  decentralized  procedure;  national
procedure; or mutual recognition procedure.

The centralized procedure provides for the grant of a single marketing authorization by the EMA that is valid in all EU Member States, as well as Iceland,
Liechtenstein and Norway. The centralized procedure is compulsory for specific products, including for medicines produced by certain biotechnological
processes, products designated as orphan medicinal products, advanced therapy medicinal products, and products with a new active substance indicated for
the  treatment  of  certain  diseases.  For  products  with  a  new  active  substance  indicated  for  the  treatment  of  other  diseases  and  products  that  are  highly
innovative or for which a centralized process is in the interest of patients, the centralized procedure may be optional. The centralized procedure may at the
request  of  the  applicant  also  be  used  in  certain  other  cases.  The  centralized  procedure  is  optional  for  products  that  represent  a  significant  therapeutic,
scientific or technical innovation, or whose authorization would be in the interest of public health.

Under the centralized procedure, the maximum timeframe for the evaluation of an MAA is 210 days, excluding clock stops, when additional information or
written or oral explanation is to be provided by the applicant in response to questions of the CHMP. Accelerated assessment might be granted by the CHMP
in  exceptional  cases,  when  a  medicinal  product  is  of  major  interest  from  the  point  of  view  of  public  health  and  from  the  viewpoint  of  therapeutic
innovation. The timeframe for the evaluation of an MAA under the accelerated assessment procedure is 150 days, excluding stop clocks.

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There are also two other possible routes to authorize medicinal products in several EU countries, which are available for investigational medicinal products
that fall outside the scope of the centralized procedure:

•

•

Decentralized procedure. Using the decentralized procedure, an applicant may apply for simultaneous authorization in more than one EU country of
medicinal products that have not yet been authorized in any EU country and that do not fall within the mandatory scope of the centralized procedure.
The applicant may choose a member state as the reference member state to lead the scientific evaluation of the application.

Mutual  recognition  procedure.  In  the  mutual  recognition  procedure,  a  medicine  is  first  authorized  in  one  EU  Member  State  (which  acts  as  the
reference  member  state),  in  accordance  with  the  national  procedures  of  that  country.  Following  this,  further  marketing  authorizations  can  be
progressively sought from other EU countries in a procedure whereby the countries concerned agree to recognize the validity of the original, national
marketing authorization produced by the reference member state.

Under  the  above-described  procedures,  before  granting  the  marketing  authorization,  the  EMA  or  the  competent  authorities  of  the  Member  States  of  the
European Economic Area make an assessment of the risk-benefit balance of the product on the basis of scientific criteria concerning its quality, safety and
efficacy.

Conditional Approval

The European Commission may also grant a so-called “conditional marketing authorization” prior to obtaining the comprehensive clinical data required for
an application for a full marketing authorization. Such conditional marketing authorizations may be granted for product candidates (including medicines
designated as orphan medicinal products), if (i) the product candidate is intended for the treatment, prevention or medical diagnosis of seriously debilitating
or life-threatening diseases, (ii) the risk-benefit balance of the product candidate is positive; (iii) it is likely that the applicant will be in a position to provide
the  required  comprehensive  clinical  trial  data;  (iv)  the  product  fulfills  an  unmet  medical  need;  and  (v)  the  benefit  to  public  health  of  the  immediate
availability on the market of the medicinal product concerned outweighs the risk inherent in the fact that additional data are still required. A conditional
marketing  authorization  may  contain  specific  obligations  to  be  fulfilled  by  the  marketing  authorization  holder,  including  obligations  with  respect  to  the
completion of ongoing or new studies, and with respect to the collection of pharmacovigilance data. Conditional marketing authorizations are valid for one
year, and may be renewed annually, if the risk-benefit balance remains positive, and after an assessment of the need for additional or modified conditions
and/or specific obligations. The timelines for the centralized procedure described above also apply with respect to the review by the CHMP of applications
for a conditional marketing authorization.

Regulatory Data Protection in the EU

In the EU, innovative medicinal products approved on the basis of a complete independent data package qualify for eight years of data exclusivity upon
marketing authorization and an additional two years of market exclusivity pursuant to Directive 2001/83/EC. Regulation (EC) No 726/2004 repeats this
entitlement  for  medicinal  products  authorized  in  accordance  with  the  centralized  authorization  procedure.  Data  exclusivity  prevents  applicants  for
authorization of generics of these innovative products from referencing the innovator’s data to assess a generic (abridged) application for a period of eight
years.  During  an  additional  two-year  period  of  market  exclusivity,  a  generic  MAA  can  be  submitted  and  authorized,  and  the  innovator’s  data  may  be
referenced, but no generic medicinal product can be placed on the EU market until the expiration of the market exclusivity. The overall ten-year period will
be extended to a maximum of 11 years if, during the first eight years of those ten years, the marketing authorization holder obtains an authorization for one
or more new therapeutic indications which, during the scientific evaluation prior to their authorization, are held to bring a significant clinical benefit in
comparison with existing therapies. Even if a compound is considered to be an NCE so that the innovator gains the prescribed period of data exclusivity,
another company nevertheless could also market another version of the product if such company obtained marketing authorization based on an MAA with a
complete independent data package of pharmaceutical, preclinical and clinical trials.

Periods of Authorization and Renewals

A marketing authorization has an initial validity for five years in principle. The marketing authorization may be renewed after five years on the basis of a
re-evaluation  of  the  risk-benefit  balance  by  the  EMA  or  by  the  competent  authority  of  the  EU  Member  State.  To  this  end,  the  marketing  authorization
holder  must  provide  the  EMA  or  the  competent  authority  with  a  consolidated  version  of  the  file  in  respect  of  quality,  safety  and  efficacy,  including  all
variations  introduced  since  the  marketing  authorization  was  granted,  at  least  six  months  before  the  marketing  authorization  ceases  to  be  valid.  The
European Commission or the competent authorities of the EU Member States may decide, on justified grounds relating to pharmacovigilance, to proceed
with one additional five-year period of marketing authorization. Once subsequently definitively renewed, the marketing authorization shall be valid for an
unlimited  period.  Any  authorization  which  is  not  followed  by  the  actual  placing  of  the  medicinal  product  on  the  EU  market  (in  case  of  centralized
procedure) or on the market of the authorizing EU Member State within three years after authorization ceases to be valid (the so-called sunset clause).

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Pediatric Studies and Exclusivity

Prior to obtaining a marketing authorization in the EU, applicants must demonstrate compliance with all measures included in an EMA-approved Pediatric
Investigation  Plan,  or  PIP,  covering  all  subsets  of  the  pediatric  population,  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  respective  requirements  for  all  marketing  authorization  procedures  are  laid  down  in
Regulation  (EC)  No  1901/2006,  the  so-called  Pediatric  Regulation.  This  requirement  also  applies  when  a  company  wants  to  add  a  new  indication,
pharmaceutical  form  or  route  of  administration  for  a  medicine  that  is  already  authorized.  The  Pediatric  Committee  of  the  EMA,  or  PDCO,  may  grant
deferrals for some medicines, allowing a company to delay development of the medicine for children until there is enough information to demonstrate its
effectiveness and safety in adults. The PDCO may also grant waivers when development of a medicine for children is not needed or is not appropriate, such
as for diseases that only affect the adult population. Before an MAA can be filed or an existing marketing authorization can be amended, the EMA requests
that companies comply with the agreed studies and measures listed in each relevant PIP. If an applicant obtains a marketing authorization in all EU Member
States, or a marketing authorization granted in the centralized procedure by the European Commission, and the study results for the pediatric population are
included in the product information, even when negative, the medicine is then eligible for an additional six month period of qualifying patent protection
through  extension  of  the  term  of  the  Supplementary  Protection  Certificate,  or  SPC,  or  alternatively  a  one  year  extension  of  the  regulatory  market
exclusivity from ten to eleven years, as selected by the marketing authorization holder.

Orphan Drug Designation and Exclusivity

Regulation  (EC)  No.  141/2000,  as  implemented  by  Regulation  (EC)  No.  847/2000  provides  that  a  drug  can  be  designated  as  an  orphan  drug  by  the
European  Commission  if  its  sponsor  can  establish  that  the  product  is  intended  for  the  diagnosis,  prevention  or  treatment  of:  (1)  a  life-threatening  or
chronically debilitating condition affecting not more than five in ten thousand persons in the EU when the application is made; or (2) a life-threatening,
seriously debilitating or serious and chronic condition in the EU and that without incentives it is unlikely that the marketing of the drug in the EU would
generate sufficient return to justify the necessary investment. For either of these conditions, the applicant must demonstrate that there exists no satisfactory
method of diagnosis, prevention or treatment of the condition in question that has been authorized in the EU or, if such method exists, the drug will be of
significant benefit to those affected by that condition.

Once authorized, orphan medicinal products are entitled to 10 years of market exclusivity in all EU Member States and a range of other benefits during the
development  and  regulatory  review  process,  including  scientific  assistance  for  study  protocols,  authorization  through  the  centralized  marketing
authorization  procedure  covering  all  member  countries,  and  a  reduction  or  elimination  of  registration  and  marketing  authorization  fees.  However,
marketing authorization may be granted to a similar medicinal product with the same orphan indication during the 10-year period with the consent of the
marketing authorization holder for the original orphan medicinal product or if the manufacturer of the original orphan medicinal product is unable to supply
sufficient quantities. Marketing authorization may also be granted to a similar medicinal product with the same orphan indication if this product is safer,
more effective or otherwise clinically superior to the original orphan medicinal product. The period of market exclusivity may, in addition, be reduced to
six  years  if  it  can  be  demonstrated  on  the  basis  of  available  evidence  that  the  original  orphan  medicinal  product  is  sufficiently  profitable  not  to  justify
maintenance of market exclusivity.

Patent Term Extensions

The European Union also provides for patent term extension through SPCs. The rules and requirements for obtaining a SPC are similar to those in the
United States. An SPC may extend the term of a patent for up to five years after its originally scheduled expiration date and can provide up to a maximum
of  fifteen  years  of  marketing  exclusivity  for  a  drug.  In  certain  circumstances,  these  periods  may  be  extended  for  six  additional  months  if  pediatric
exclusivity is obtained. Although SPCs are available throughout the European Union, sponsors must apply on a country by country basis. Similar patent
term extension rights exist in certain other foreign jurisdictions outside the European Union.

Regulatory Requirements after a Marketing Authorization has been Obtained

When  an  authorization  for  a  medicinal  product  in  the  EU  is  obtained,  the  holder  of  the  marketing  authorization  is  required  to  comply  with  a  range  of
requirements applicable to the manufacturing, marketing, promotion and sale of medicinal products. These include:

•

•

The EU’s pharmacovigilance or safety reporting rules, which can impose post-authorization studies and additional monitoring obligations.

The  manufacturing  of  authorized  medicinal  products,  for  which  a  separate  manufacturer’s  license  is  mandatory,  must  also  be  conducted  in  strict
compliance  with  the  applicable  EU  laws,  regulations  and  guidance,  including  Directive  2001/83/EC,  Directive  2003/94/EC,  Regulation  (EC)  No
726/2004  and  the  European  Commission  Guidelines  for  Good  Manufacturing  Practice.  These  requirements  include  compliance  with  EU  cGMP
standards when manufacturing

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medicinal products and active pharmaceutical ingredients, including the manufacture of active pharmaceutical ingredients outside of the EU with the
intention to import the active pharmaceutical ingredients into the EU.

•

The marketing and promotion of authorized drugs, including industry-sponsored continuing medical education and advertising directed toward the
prescribers of drugs and/or the general public, are strictly regulated in the EU notably under Directive 2001/83EC, as amended, and EU Member
State laws. Direct-to-consumer advertising of prescription medicines is prohibited across the EU.

General Data Protection Regulation

The collection, use, disclosure, transfer, or other processing of personal data regarding individuals in the EU, including personal health data, is subject to
the  EU  General  Data  Protection  Regulation,  or  GDPR,  which  became  effective  on  May  25,  2018.  The  GDPR  is  wide-ranging  in  scope  and  imposes
numerous requirements on companies that process personal data, including requirements relating to processing health and other sensitive data, obtaining
consent  of  the  individuals  to  whom  the  personal  data  relates,  providing  information  to  individuals  regarding  data  processing  activities,  implementing
safeguards to protect the security and confidentiality of personal data, providing notification 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 EU, including the United States, and
permits data protection authorities to impose large penalties for violations of the GDPR, including potential fines of up to €20 million or 4% of annual
global revenues, whichever is greater. The GDPR also confers a private right of action on data subjects and consumer associations to lodge complaints with
supervisory authorities, seek judicial remedies, and obtain compensation for damages resulting from violations of the GDPR. Compliance with the GDPR
will be a rigorous and time-intensive process that may increase the cost of doing business or require companies to change their business practices to ensure
full compliance. In July 2020, the Court of Justice of the European Union, or the CJEU, invalidated the EU-U.S. Privacy Shield framework, one of the
mechanisms used to legitimize the transfer of personal data from the EEA to the United States. The CJEU decision also drew into question the long-term
viability  of  an  alternative  means  of  data  transfer,  the  standard  contractual  clauses,  for  transfers  of  personal  data  from  the  EEA  to  the  United  States.
Following the withdrawal of the U.K. from the EU, the U.K. Data Protection Act 2018 applies to the processing of personal data that takes place in the
U.K. and includes parallel obligations to those set forth by GDPR.

Pricing Decisions for Approved Products

In the EU, pricing and reimbursement schemes vary widely from country to country. Some countries provide that products may be marketed only after a
reimbursement price has been agreed. Some countries may require the completion of additional studies that compare the cost-effectiveness of a particular
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  options  for  its  Member  States  to  restrict  the  range  of  products  for  which  their  national  health  insurance  systems  provide
reimbursement and to control the prices of medicinal products for human use. 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 Member States allow companies
to fix their own prices for products, but monitor and control prescription volumes and issue guidance to physicians to limit prescriptions. Recently, many
countries in the EU have increased the amount of discounts required on pharmaceuticals, and these efforts could continue as countries attempt to manage
health care 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, particularly prescription products, has become intense. As a result, increasingly high barriers are being erected to the entry of new
products.  Political,  economic  and  regulatory  developments  may  further  complicate  pricing  negotiations,  and  there  negotiations  may  continue  after
reimbursement has been obtained. Reference pricing used by various Member States, and parallel trade (i.e., arbitrage between low-priced and high-priced
Member States), can further reduce prices. There can be no assurance that any country with price controls or reimbursement limitations for pharmaceutical
products will allow favorable reimbursement and pricing arrangements for any products, if approved in those countries.

Segment Reporting and Geographical Information

We are engaged solely in the discovery and development of medicines in the field of cellular metabolism. Accordingly, we have determined that we operate
in one operating segment.

Our Scientific Advisors

Scientific Advisors

We  have  assembled  a  world-class  scientific  advisory  board  that  includes  renowned  experts  in  cellular  metabolism,  drug  discovery  and  translational
medicine. These advisors work in close collaboration with our scientists to identify new research directions and accelerate our target validation and drug
discovery programs.

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Name
Scott Biller, Ph.D.
Lewis C. Cantley, Ph.D.
Ralph Deberardinis, M.D., Ph.D.
Tak W. Mak, Ph.D.
Shin-San Michael Su, Ph.D.
Marc Tessier-Lavigne, Ph.D.
Craig B. Thompson, M.D.
Matthew Vander Heiden, M.D., Ph.D.

Employees and Human Capital

Primary affiliation
Former Chief Scientific Officer of Agios Pharmaceuticals
The Cancer Center at Weill Cornell Medical College and New York-Presbyterian Hospital
Children's Medical Center Research Institute at University of Texas Southwestern
University of Toronto and the Campbell Family Institute for Breast Cancer Research
Former Chief Scientific Officer of Decibel Therapeutics
Stanford University
Memorial Sloan-Kettering Cancer Center
Koch Institute for Integrative Cancer Research at Massachusetts Institute of Technology

As  of  December  31,  2021,  we  had  390  full-time  employees  and  2  part-time  employees,  all  based  in  the  United  States  and  of  which  120  held  Ph.D.,
Pharm.D. or M.D. degrees. None of our employees are represented by a labor union or covered under a collective bargaining agreement. We also retain
independent  contractors  to  support  the  goals  of  our  organization.  We  prioritize  our  employee  experience  and  we  are  proud  of  our  strong  employee  and
contractor relations.

We understand that attracting, retaining, engaging and supporting our talented team and maintaining a diverse and inclusive organization is critical to our
success and our ability to increase the value we can provide for patients, shareholders and all stakeholders.

We strive to cultivate a positive, respectful and fair work environment guided by the following three pillars:

•

•

•

Flexibility: We provide flexible work arrangements which results in happier, more engaged and more productive employees. We encourage a culture
that promotes different perspectives, different work styles, health and wellness, care of families and productivity.

Psychological safety: We aim to ensure our teams experience psychological safety – the belief that risk-taking and failure will not be punished,
which leads to higher performing teams, more creativity, candor and better results.

Deliberate development: We emphasize providing ongoing opportunities for employees to grow professionally, whether through bringing in external
speakers, offering preceptorships in different departments, and providing tuition reimbursement and leadership skills training.

To incentivize and reward strong performance, we have established a competitive and balanced compensation and benefits package, including short-term
and long-term incentives, discretionary paid time off policy, generous parental and family leave plans and premium medical benefits.

We  are  committed  to  fostering  a  welcoming  and  diverse  workplace  in  which  individuals  from  a  variety  of  backgrounds  can  thrive.  Our  diversity  and
inclusion program focuses on valuing three types of differences:

•

•

•

Representative differences (demographic diversity, such as gender, race, ethnicity, sexual orientation)

Experiential differences (identities based on life experiences that may change over time)

Cognitive differences (unique ways of understanding and interpreting the world)

We are a majority female organization and we maintain significant representation at all levels, including the Board of Directors. As of December 31, 2021,
59% of our workforce were women. Racial and ethnic diversity in the aggregate has improved at our company over the last few years. As of December 31,
2021, 30% of our workforce were ethnically diverse. However, we recognize that there is still important progress to be made, particularly as it relates to
Black and Latino representation at our company, and this remains an area of continued emphasis for us.

We regularly evaluate the effectiveness of our human capital management practices through employee surveys and fostering a culture of ongoing feedback
and  two-way  dialogue.  In  addition,  we  track  important  human  capital  metrics  such  as  turnover  rate.  Voluntary  and  involuntary  turnover  rates  across  all
levels (executives/ senior managers, mid-level managers and professionals) are in alignment with, or lower than, the industry average.

The COVID-19 pandemic evolved throughout 2021 and we continued to demonstrate our commitment to the health and wellbeing of our employees, our
patients  and  our  community.  We  regularly  monitored  local  and  national  public  health  data  and  guidelines  and  adjusted  our  practices  accordingly,  while
maintaining  operational  productivity.  During  2021,  we  were  able  to  eliminate  our  onsite  testing  requirements  and  temporarily  relax  our  mask  wearing
policy. We also implemented a mandatory

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vaccination policy for all employees, regardless of their role or work locations, subject to limited exceptions. Thoughtful management of our COVID-19
response continues to be a priority for our leadership team.

We have continued the employee communication approach we implemented during 2020 with frequent virtual/hybrid meetings and the use of our dedicated
intranet  site  to  provide  regular,  transparent  updates  on  the  company’s  COVID-19  response.  We  also  implemented  a  new  “Re-imagining  Work”  policy
providing  employees  whose  roles  do  not  require  an  onsite  or  in  field  presence  with  an  opportunity  to  choose  the  right  working  arrangement  or  them  --
whether remote, hybrid with time split between home or the office, or primarily onsite in our Cambridge office.

As we have continued to navigate the ever-changing environment of the pandemic, we believe our ability to embrace change and our long-standing culture
of flexibility have helped us maintain productivity to deliver for patients.

Our Corporate Information

Our executive offices are located at 88 Sidney Street, Cambridge, Massachusetts 02139, and our telephone number is (617) 649-8600. Our website address
is www.agios.com. References to our website are inactive textual references only and the content of our website should not be deemed incorporated by
reference into this Form 10-K.

Available Information

Our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and any amendments to these reports filed or furnished
pursuant  to  Section  13(a)  or  15(d)  of  the  Securities  Exchange  Act  of  1934,  as  amended,  are  available  free  of  charge  on  our  website  located  at
www.agios.com as soon as reasonably practicable after they are filed with or furnished to the Securities and Exchange Commission, or SEC. These reports
are also available at the SEC’s website at www.sec.gov.

A  copy  of  our  Corporate  Governance  Guidelines,  Code  of  Business  Conduct  and  Ethics  and  the  charters  of  the  Audit  Committee,  Compensation
Committee, and Nominating and Corporate Governance Committee are posted on our website, www.agios.com, under the heading “Corporate Governance”
and are available in print to any person who requests copies by contacting us by calling (617) 649-8600 or by writing to Agios Pharmaceuticals, Inc., 88
Sidney Street, Cambridge, Massachusetts 02139.

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Item 1A. Risk Factors

The following risk factors and other information included in this Annual Report on Form 10-K should be carefully considered. The risks and uncertainties
described below are not the only risks and uncertainties we face. Additional risks and uncertainties not presently known to us or that we presently deem
less significant may also impair our business operations. Please see page 1 of this Annual Report on Form 10-K for a discussion of some of the forward-
looking statements that are qualified by these risk factors. If any of the following risks occur, our business, financial condition, results of operations and
future growth prospects could be materially and adversely affected.

Risks Related to the Discovery, Development, and Commercialization of our Products and Product Candidates

If we do not successfully commercialize PYRUKYND and other products for which we receive approval, our prospects may be substantially harmed.

In  February  2022,  we  obtained  marketing  approval  from  the  FDA  for  PYRUKYND®  (mitapivat)  for  the  treatment  of  hemolytic  anemia  in  adults  with
pyruvate kinase (PK) deficiency in the United States. PYRUKYND® is the first product for which we have received marketing approval following the sale
of our oncology business to Servier in March 2021 and PYRUKYND® is the first product in our GDD portfolio that has received marketing approval. Our
ability to generate revenue from PYRUKYND® will depend heavily on our successful development and commercialization of the product.

The development and commercialization of PYRUKYND® could be unsuccessful if:

•

the medical community and third-party payors do not accept PYRUKYND® as safe, efficacious and cost-effective for the treatment of adults with
PK deficiency;

• we fail to maintain the necessary financial resources and expertise to manufacture, market and sell PYRUKYND®;

• we  fail  to  develop,  implement  and  maintain  effective  marketing,  sales  and  distribution  strategies  and  operations  for  the  development  and

commercialization of PYRUKYND®;

• we  fail  to  continue  to  develop,  validate  and  maintain  a  commercially  viable  manufacturing  process  for  PYRUKYND®  that  is  compliant  with

current good manufacturing practices, or cGMP;

• we fail to successfully obtain third party reimbursement and generate commercial demand that results in sales of PYRUKYND®;

•

•

PYRUKYND®  or  any  product  candidate  that  we  commercialize,  may  become  subject  to  unfavorable  pricing  regulations  and  third-party
reimbursement practices, which would harm our business.

our efforts to commercialize PYRUKYND® are impeded by the effects of the COVID-19 pandemic;

• we encounter any third-party patent interference, derivation, inter partes review, post-grant review, reexamination or patent infringement claims

with respect to PYRUKYND®;

• we fail to comply with regulatory and legal requirements applicable to the sale of PYRUKYND®;

•

competing drug products are approved for the same indications as PYRUKYND®;

• we fail to approve marketing approval of PYRUKYND® in jurisdictions other than the United States;

•

new significant safety risks are identified;

• we fail to gain and/or maintain sufficient market acceptance by physicians, patients, healthcare payors and others in the medical community; or,

•

•

a significant number of eligible patients with PK deficiency do not end up being prescribed PYRUKYND® and, if they are, such patients do not
stay on treatment; or

PYRUKYND®  does  not  demonstrate  acceptable  safety  and  efficacy  in  current  or  future  clinical  trials,  or  otherwise  does  not  meet  applicable
regulatory standards for approval in indications other than currently approved indications.

If we experience significant delays or an inability to successfully develop and commercialize PYRUKYND® our business would be materially harmed.

We depend heavily on the success of our clinical product candidates, including our lead product candidate PYRUKYND® for use in indications other
than PK deficiency and in other jurisdictions. Clinical trials of our product candidates may not be successful for a number of important reasons. If we
or our collaborators are unable to commercialize our product candidates or experience significant delays in doing so, our business will be materially
harmed.

We have invested a significant portion of our efforts and financial resources in the identification of our product candidates and development of our most
advanced  clinical  programs.  Our  ability  to  generate  product  revenue  will  depend  heavily  on  the  successful  clinical  development  and  eventual
commercialization  of  our  current  and  any  future  product  candidates,  including  PYRUKYND®  for  use  in  indications  other  than  PK  deficiency  and  in
jurisdictions outside of the United States. We have invested a significant portion of our efforts and financial resources in the identification of our product
candidates and

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development  of  our  most  advanced  programs,  including  PYRUKYND®.  In  February  2022,  the  FDA  approved  PYRUKYND®  for  the  treatment  of
hemolytic anemia in adults with PK deficiency in the United States. In June 2021, we submitted a MAA to the EMA for the treatment of adults with PK
deficiency the European Union.

We,  and  any  collaborators,  are  not  permitted  to  commercialize,  market,  promote  or  sell  any  product  candidate  in  the  United  States  without  obtaining
marketing approval from the FDA. Foreign regulatory authorities, such as the EMA, impose similar requirements in foreign jurisdictions. Before obtaining
marketing  approval  from  regulatory  authorities  for  the  sale  of  our  product  candidates,  we  must  complete  preclinical  development  and  then  conduct
extensive clinical trials to demonstrate the safety and efficacy of our product candidates in humans.

Clinical testing is expensive, difficult to design and implement, can take many years to complete and is uncertain as to outcome. We cannot guarantee that
any clinical trials will be conducted as planned or completed on schedule, if at all. The clinical development of our product candidates is susceptible to the
risk of failure inherent at any stage of product development. Moreover, we, or any collaborators, may experience any of a number of possible unforeseen
adverse events in connection with clinical trials, many of which are beyond our control, including:

• we, or our collaborators, may fail to demonstrate efficacy in a clinical trial or across a broad population of patients;

•

•

•

•

•

it is possible that even if one or more of our product candidates has a beneficial effect, that effect will not be detected during clinical evaluation as
a  result  of  one  or  more  of  a  variety  of  factors,  including  the  size,  duration,  design,  measurements,  conduct  or  analysis  of  our  clinical  trials.
Conversely, as a result of the same factors, our clinical trials may indicate an apparent positive effect of a product candidate that is greater than the
actual  positive  effect,  if  any.  For  example,  many  compounds  that  initially  showed  promise  in  earlier  stage  testing  for  treating  specific  disease
indications have later been found to cause side effects that prevented further development of the compound;

our  product  candidates  may  have  undesirable  side  effects  or  other  unexpected  characteristics  or  otherwise  expose  participants  to  unacceptable
health risks, causing us, our collaborators or our investigators, regulators or institutional review boards or the data safety monitoring board for
such trial to halt, delay, interrupt, suspend or terminate the trials or cause us, or any collaborators, to abandon development or limit development of
that product candidate to certain uses or subpopulations in which the undesirable side effects or other characteristics are less prevalent, less severe
or more acceptable from a risk-benefit perspective;

if  our  product  candidates  have  undesirable  side  effects,  it  could  result  in  a  more  restrictive  label,  or  it  could  result  in  the  delay  or  denial  of
marketing approval by the FDA or comparable foreign regulatory authorities;

clinical trials of our product candidates may produce negative or inconclusive results, and we, or our collaborators, may decide, or regulators may
require us, to conduct additional clinical trials, including testing in more subjects, or abandon product development programs;

regulators  or  institutional  review  boards  may  not  authorize  us,  our  collaborators  or  our  investigators  to  commence  a  clinical  trial  or  conduct  a
clinical trial at a prospective trial site;

• we or our collaborators may have delays in reaching or fail to reach agreement on acceptable clinical trial contracts or clinical trial protocols with

prospective trial sites;

•

•

•

•

•

the number of patients required for clinical trials of our product candidates may be larger than we anticipate; enrollment in these clinical trials,
which  may  be  particularly  challenging  for  some  of  the  orphan  diseases  we  target  in  our  GDD  programs,  may  be  slower  than  we  anticipate;  or
participants may drop out of these clinical trials at a higher rate than we anticipate;

third-party contractors used by us or our collaborators may fail to comply with regulatory requirements or meet their contractual obligations in a
timely manner, or at all;

significant preclinical study or clinical trial delays could shorten any periods during which we, or any collaborators, may have the exclusive right
to commercialize our product candidates or allow our competitors, or the competitors of any collaborators, to bring products to market before we,
or any collaborators, do;

the cost of clinical trials of our product candidates may be greater than anticipated; and,

the supply or quality of our product candidates or other materials necessary to conduct clinical trials of our product candidates may be insufficient
or inadequate.

In December 2016, we withdrew our IND for AG-519, our second PKR activator, following verbal notification of a clinical hold from the FDA relating to a
previously disclosed case of drug-induced cholestatic hepatitis which occurred in our phase 1 clinical trial of AG-519 in healthy volunteers. Although these
decisions and this hepatic adverse event finding do not affect our ongoing clinical trials for PYRUKYND®, our first PKR activator, we cannot provide any
assurances that there will not be similar or other treatment-related severe adverse events in our other clinical trials of PYRUKYND®, that our other trials
will not be placed on clinical hold in the future, or that patient recruitment for our other trials will not be adversely impacted.

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Our  failure  to  successfully  begin  and  complete  clinical  trials  of  our  product  candidates  and  to  demonstrate  the  efficacy  and  safety  necessary  to  obtain
regulatory approval to market any of our product candidates could result in additional costs to us, or any collaborators, would impair our ability to generate
revenue from product sales, regulatory and commercialization milestones and royalties and would significantly harm our business.

We may not be successful in our efforts to identify or discover potential product candidates or to develop medicines of commercial value and we may
not achieve our goals included in our strategic vision.

A key element of our strategy is to identify and test compounds that target cellular metabolism and adjacent areas of biology in a variety of different types
of GDDs. A significant portion of the research that we are conducting involves new compounds and drug discovery methods, including our proprietary
technology. The drug discovery that we are conducting using our proprietary technology may not be successful in identifying compounds in our therapeutic
areas. In addition, our research programs may initially show promise in identifying potential product candidates, yet fail to yield product candidates for
clinical development for a number of reasons, including:

•

•

the research methodology used may not be successful in identifying appropriate biomarkers or potential product candidates; or

potential  product  candidates  may,  on  further  study,  be  shown  to  have  harmful  side  effects  or  other  characteristics  that  indicate  that  they  are
unlikely to be medicines that will receive marketing approval and achieve market acceptance.

Research programs to identify new product candidates require substantial technical, financial and human resources. We may choose to focus our efforts and
resources on a potential product candidate that ultimately proves to be unsuccessful.

If we are unable to identify suitable compounds for preclinical and clinical development, or any medicines we develop do not effectively correct metabolic
pathways or alter the metabolic state of immune cells, we will not be able to achieve our strategic vision and our specific long-term goals and will not be
able generate product revenue in future periods, which likely would result in significant harm to our financial position and adversely impact our stock price.

The  COVID-19  pandemic  has  and  may  continue  to  affect  our  ability  to  initiate  or  continue  our  planned,  ongoing  and  future  clinical  trials,  disrupt
regulatory  activities,  disrupt  our  ability  to  maintain  a  commercial  infrastructure  for  our  product  or  have  other  adverse  effects  on  our  business  and
operations. In addition, this pandemic may continue to adversely impact economies worldwide, which could result in adverse effects on our business
and operations.

In  response  to  the  COVID-19  pandemic,  we  were  temporarily  required  to  close  our  facilities  except  for  a  limited  number  of  essential  facilities  and
laboratory staff. Our Cambridge office reopened, with appropriate safety precautions in place that are aligned with local and CDC advisements. Operations
have maintained productivity, while allowing employees who prefer to work onsite all or some of the time. Additionally, our field-based employees engage
with healthcare providers and other third parties remotely and, where local regulations allow, on a limited in-person basis. In November 2021, we began
requiring all employees, regardless of role or work location, to be fully vaccinated against COVID-19, as defined by CDC guidelines, subject to limited
exceptions.

We may face disruptions that may affect our ability to initiate and complete clinical trials including disruptions in procuring items that are essential for our
research and development activities, including, for example, raw materials used in the manufacturing of our product candidates and laboratory supplies for
planned and ongoing clinical trials, in each case, for which there may be shortages because of ongoing efforts to address the outbreak. We have enrolled,
and  seek  to  enroll,  patients  in  our  clinical  trials  at  sites  located  both  in  the  United  States  and  internationally.  Site  initiation,  participant  recruitment  and
enrollment, participant dosing, distribution of clinical trial materials, study monitoring and data analysis has been and may continue to be paused or delayed
due to changes in hospital or university policies, federal, state or local regulations, prioritization of hospital resources toward pandemic efforts, or other
reasons related to the pandemic. We have faced and may continue to face difficulties recruiting or retaining patients in our ongoing clinical trials because of
the pandemic. Patients enrolled in our clinical trials may be unable or unwilling to visit clinical trial sites which may impact the collection of important
clinical trial data and has, and may continue to, necessitate remote data verification. In addition, limitations in the ability to visit sites has affected, and may
continue to affect, our enrollment timelines for our clinical trials, and may adversely affect the timing of completion of our clinical trials or our ability to
complete clinical trials in a fully compliant manner. Additionally, the potential suspension of clinical trial activity at clinical trial sites may have an adverse
impact on our clinical trial plans and timelines.

We have faced and may continue to face disruptions in our ability to prepare and submit applications to regulatory authorities for drug approvals and to
build and maintain a commercial infrastructure for our product and product candidates. We may face manufacturing disruptions or disruptions related to the
ability to obtain necessary institutional review board or other necessary site approvals, as well as other delays at clinical trial sites.

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The response to the COVID-19 pandemic may redirect resources with respect to regulatory and intellectual property matters in a way that would adversely
impact our ability to progress regulatory approvals and protect our intellectual property. In addition, we may face impediments to regulatory meetings and
approvals due to measures intended to limit in-person interactions.

The COVID-19 pandemic may continue to significantly impact economies and financial markets worldwide, which could result in adverse effects on our
business and operations, impact our ability to raise additional funds through public offerings and impact the volatility of our stock price and trading in our
stock. We cannot be certain what the overall impact of the COVID-19 pandemic will be on our business in the future and a continuation of the pandemic
has the potential to adversely affect our business, financial condition, results of operations, and prospects.

If we experience delays or difficulties in the enrollment of patients in clinical trials, our receipt of necessary regulatory approvals could be delayed or
prevented.

We or our collaborators may not be able to initiate, continue or complete clinical trials for our product candidates if we or they are unable to locate and
enroll a sufficient number of eligible patients to participate in these trials as required by the FDA or analogous regulatory authorities outside the United
States. Furthermore, enrollment has been and may continue to be particularly challenging in light of the ongoing COVID-19 pandemic and even more so
for some of the orphan diseases we target in our GDD programs.

Patient enrollment is also affected by other factors including:

•

•

•

•

•

•

•

•

prevalence and severity of the disease under investigation;

availability and efficacy of approved medications for the disease under investigation;

eligibility criteria for the study in question;

perceived risks and benefits of the product candidate under study;

efforts to facilitate timely enrollment in clinical trials;

patient referral practices of physicians;

the ability to monitor patients adequately during and after treatment; and

proximity and availability of clinical trial sites for prospective patients.

Utilizing  our  precision  medicine  approach,  we  generally  focus  our  development  activities  on  genetically  or  biomarker  defined  patients  most  likely  to
respond to our therapies. As a result, the potential patient populations for our clinical trials are narrowed, and we may experience difficulties in identifying
and enrolling a sufficient number of patients in our clinical trials.

In addition, some of our competitors may have ongoing or planned clinical trials for product candidates that would treat the same indications as our product
candidates, and patients who would otherwise be eligible for our clinical trials may instead enroll in clinical trials of our competitors’ product candidates.
For  example,  Rocket  Pharma  LTD,  or  Rocket  Pharma,  is  developing  a  gene  therapy  targeting  PK  deficiency;  Vertex  Pharmaceuticals  Incorporated,  or
Vertex, is developing a gene therapy targeting SCD; IMARA Inc., or IMARA, and Forma Therapeutics Holdings, Inc., or Forma, are developing molecules
for the treatment of beta thalassemia and SCD; Global Blood Therapeutics is developing molecules for the treatment of SCD; Fibrogen, Inc. is developing
Roxadustat  for  the  treatment  of  anemia  in  MDS  patients;  and  Geron  Corporation  is  developing  imetelstat  for  the  treatment  of  low-risk  MDS.  Roivant
Sciences  is  developing  RVT-2001  (licensed  from  Eisai  Co.,  Ltd.)  for  the  treatment  of  transfusion-dependent  anemia  in  patients  with  lower-risk  MDS.
Competition for eligible patients may make it particularly difficult for us to enroll a sufficient number of patients to complete our clinical trials for our
product candidates in a timely and cost-effective manner.

We rely on contract research organization, or CROs, and clinical trial sites to ensure the proper and timely conduct of our clinical trials and while we have
agreements governing their committed activities, we have limited influence over their actual performance. Our or our collaborators’ inability to enroll a
sufficient number of patients for our clinical trials would result in significant delays or may require us to abandon one or more clinical trials altogether.
Enrollment delays in our clinical trials may result in increased development costs for our product candidates, which would cause the value of our company
to decline and limit our ability to obtain additional financing.

Results of preclinical studies and early clinical trials may not be predictive of results of later-stage clinical trials.

The outcome of preclinical studies and early clinical trials may not be predictive of the success of later clinical trials, and interim results of clinical trials do
not  necessarily  predict  success  in  future  clinical  trials.  Many  companies  in  the  pharmaceutical  and  biotechnology  industries  have  suffered  significant
setbacks in late-stage clinical trials after achieving positive results in earlier stages of development, and we could face similar setbacks. The design of a
clinical trial can determine whether its results will support approval of a product and flaws in the design of a clinical trial may not become apparent until
the clinical trial is well advanced. In addition, preclinical and clinical data are often susceptible to varying interpretations and analyses. Many companies
that believed their product candidates performed satisfactorily in preclinical studies and clinical trials have

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nonetheless failed to obtain marketing approval for the product candidates. Even if we, or any collaborators, believe that the results of clinical trials for our
product candidates warrant marketing approval, the FDA or comparable foreign regulatory authorities may disagree and may not grant marketing approval
of our product candidates.

In  some  instances,  there  can  be  significant  variability  in  safety  or  efficacy  results  between  different  clinical  trials  of  the  same  product  candidate  due  to
numerous factors, including changes in trial procedures set forth in protocols, differences in the size and type of the patient populations, changes in and
adherence to the dosing regimen and other clinical trial protocols and the rate of dropout among clinical trial participants. While we obtained marketing
approval  of  PYRUKYND®  for  the  treatment  of  [adults  with  PK  deficiency]  in  the  United  States,  we  cannot  be  certain  that  we  will  obtain  marketing
approval  of  PYRYKYND®  in  other  indications.  The  results  of  clinical  trials  of  PYRUKYND®  for  the  treatment  of  PK  deficiency  do  not  predict  that
PYRUKYND® will be efficacious in our ongoing clinical trials in other indications. If we fail to receive positive results in clinical trials of our product
candidates,  the  development  timeline  and  regulatory  approval  and  commercialization  prospects  for  our  most  advanced  product  candidates,  and,
correspondingly, our business and financial prospects would be negatively impacted.

We may expend our limited resources to pursue a particular product candidate or indication and fail to capitalize on product candidates or indications
that may be more profitable or for which there is a greater likelihood of success.

Because  we  have  limited  financial  and  managerial  resources,  we  focus  on  research  programs  and  product  candidates  that  we  identify  for  specific
indications.  As  a  result,  we  may  forego  or  delay  pursuit  of  opportunities  with  other  product  candidates  or  for  other  indications  that  later  prove  to  have
greater  commercial  potential.  Our  resource  allocation  decisions  may  cause  us  to  fail  to  capitalize  on  viable  commercial  medicines  or  profitable  market
opportunities. Our spending on current and future research and development programs and product candidates for specific indications may not yield any
commercially  viable  medicines.  If  we  do  not  accurately  evaluate  the  commercial  potential  or  target  market  for  a  particular  product  candidate,  we  may
relinquish valuable rights to that product candidate through collaboration, licensing or other royalty arrangements in cases in which it would have been
more advantageous for us to retain sole development and commercialization rights to such product candidate.

Even if any of our product candidates receives marketing approval, we or others may later discover that the product is less effective than previously
believed  or  causes  undesirable  side  effects  that  were  not  previously  identified,  which  could  compromise  our  ability,  or  that  of  any  collaborators,  to
market the product.

It is possible that our clinical trials, or those of any collaborators, may indicate an apparent positive effect of a product candidate that is greater than the
actual  positive  effect,  if  any,  or  alternatively  fail  to  identify  undesirable  side  effects.  If,  following  approval  of  a  product  candidate,  including
PYRUKYND®, we, or others, discover that the product is less effective than previously believed or causes undesirable side effects that were not previously
identified, any of the following adverse events could occur:

•

regulatory authorities may withdraw their approval of the product or seize the product;

• we, or any collaborators, may be required to recall the product, change the way the product is administered or conduct additional clinical trials;

•

additional restrictions may be imposed on the marketing of, or the manufacturing processes for, the particular product;

• we may be subject to fines, injunctions or the imposition of civil or criminal penalties;

•

regulatory authorities may require the addition of labeling statements;

• we,  or  any  collaborators,  may  be  required  to  create  a  Medication  Guide  outlining  the  risks  of  the  previously  unidentified  side  effects  for

distribution to patients;

• we, or any collaborators, could be sued and held liable for harm caused to patients;

•

•

the product may become less competitive; and

our reputation may suffer.

PYRUKYND®,  or  any  of  our  product  candidates  that  may  receive  marketing  approval  in  the  future,  may  fail  to  achieve  the  degree  of  market
acceptance by physicians, patients, healthcare payors and others in the medical community necessary for commercial success.

PYRUKYND®, or any of our product candidates that may receive marketing approval in the future, may fail to gain and/or maintain sufficient market
acceptance  by  physicians,  patients,  healthcare  payors  and  others  in  the  medical  community.  If  PYRUKYND®  or  any  of  our  product  candidates,  if
approved, do not achieve an adequate level of acceptance, we may not generate significant product revenue and we may not become profitable. The degree
of market acceptance of PYRUKYND® and any of our product candidates, if approved for commercial sale, will depend on a number of factors, including:

•

efficacy and potential advantages compared to alternative treatments;

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•

•

•

•

•

•

•

the ability to offer our medicines for sale at competitive prices;

convenience and ease of administration compared to alternative treatments;

the willingness of the target patient population to try new therapies and of physicians to prescribe these therapies;

ensuring uninterrupted product supply;

the strength of marketing and distribution support;

sufficient third-party coverage or reimbursement; and

the prevalence and severity of any side effects.

If we are unable to establish and maintain sales and marketing capabilities or enter into agreements with third parties to sell and market our product
candidates, we may not be successful in commercializing PYRUKYND® or our product candidates if they are approved.

We have limited experience in the sale, marketing or distribution of pharmaceutical products. To achieve commercial success for approved medicines for
which we retain sales and marketing responsibilities, we must either develop a sales and marketing organization or outsource these functions to other third
parties. Although we had established sales and marketing capabilities to support our co-promotion efforts for IDHIFA® and our sales of TIBSOVO® prior
to the sale of our oncology business to Servier, we are again in the process of building our sales and marketing infrastructure to commercially launch and
sell PYRUKYND® for the treatment of hemolytic anemia in adults with pyruvate kinase (PK) deficiency in the United States. We may need to further
build our sales and marketing infrastructure to commercialize PYRUKYND® in other indications or outside of the United States or to commercialize any
of our other product candidates for which we obtain marketing approval.

There are risks involved with both establishing our own sales and marketing capabilities and entering into arrangements with third parties to perform these
services. For example, recruiting and training a sales force is expensive and time consuming and could delay any product launch. If the commercial launch
of a product candidate for which we recruit a sales force and establish marketing capabilities is delayed or does not occur for any reason, we would have
prematurely  or  unnecessarily  incurred  these  commercialization  expenses.  This  may  be  costly,  and  our  investment  would  be  lost  if  we  cannot  retain  or
reposition our sales and marketing personnel.

Factors that may inhibit our efforts to commercialize our medicines on our own include:

•

•

•

•

our inability to recruit and retain adequate numbers of effective sales and marketing personnel;

the inability of sales personnel to obtain access to physicians or persuade adequate numbers of physicians to prescribe any future medicines;

the lack of complementary medicines to be offered by sales personnel, which may put us at a competitive disadvantage relative to companies with
more extensive product lines; and

unforeseen costs and expenses associated with creating an independent sales and marketing organization.

If we enter into arrangements with third parties to perform sales, marketing and distribution services, our product revenue or the profitability of product
revenue to us are likely to be lower than if we were to market and sell any medicines that we develop ourselves. In addition, we may not be successful in
entering into arrangements with third parties to sell and market our product candidates or may be unable to do so on terms that are favorable to us. We
likely  will  have  little  control  over  such  third  parties,  and  any  of  them  may  fail  to  devote  the  necessary  resources  and  attention  to  sell  and  market  our
medicines effectively. If we do not establish sales and marketing capabilities successfully, either on our own or in collaboration with third parties, we will
not be successful in commercializing PYRUKYND® or any of our product candidates for which we obtain marketing approval.

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

We face competition with respect to PYRUKYND® and our current product candidates, and we and our collaborators will face competition with respect to
any product candidates that we or they may seek to develop or commercialize in the future. Potential competitors include major pharmaceutical companies,
specialty  pharmaceutical  companies,  biotechnology  companies,  academic  institutions,  government  agencies  and  other  public  and  private  research
organizations  that  conduct  research,  seek  patent  protection  and  establish  collaborative  arrangements  for  research,  development,  manufacturing  and
commercialization. There are a number of large pharmaceutical and biotechnology companies that currently market and sell products or are pursuing the
development  of  products  for  the  treatment  of  the  disease  indications  for  which  we  are  developing  our  product  or  our  product  candidates,  such  as  PK
deficiency, thalassemia, SCD and L-IR MDS. For example, Acceleron Pharma Inc. (in collaboration with Bristol-Myers Squibb Company) and bluebird
bio,  Inc.,  or  bluebird,  are  each  marketing  therapies  to  treat  beta  thalassemia,  Novartis  International  AG,  Emmaus  Life  Sciences  and  Global  Blood
Therapeutics are each marketing

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therapies  to  treat  SCD,  Rocket  Pharma  is  conducting  a  clinical  trial  of  a  gene  therapy  targeting  PK  deficiency,  and  a  number  of  other  biotechnology
companies have product candidates in clinical development in similar indications as ours.

There  are  a  variety  of  treatment  options  available,  including  a  number  of  marketed  enzyme  replacement  therapies,  for  treating  patients  with  GDDs.  In
addition to currently marketed therapies, there are also a number of products that are either enzyme replacement therapies, gene therapies or PK activators
in various stages of clinical development to treat GDDs. These products in development may provide efficacy, safety, convenience and other benefits that
are not provided by currently marketed therapies or for which there are no approved treatments. As a result, they may provide significant competition for
any of our product candidates for which we obtain marketing approval.

There are also a number of product candidates in preclinical or clinical development by third parties to treat GDDs by targeting similar mechanisms of
action  as  our  product  candidates.  These  companies  include  large  pharmaceutical  companies,  such  as  Novartis,  as  well  as  biotechnology  companies  of
various sizes, such as BioMarin Pharmaceutical Inc., bluebird, Forma, IMARA, PTC Therapeutics, Inc., Rocket Pharma, and Vertex. Our competitors may
develop products that are more effective, safer, more convenient or less costly than PYRUKYND® or any product candidates that we are developing or
that would render PYRUKYND® or our product candidates obsolete or non-competitive. In addition, our competitors may discover biomarkers that more
efficiently measure metabolic pathways than our methods, which may give them a competitive advantage in developing potential products. Our competitors
may also obtain marketing approval from the FDA or other regulatory authorities for their products more rapidly than we may obtain approval for ours,
which could result in our competitors establishing a strong market position before we are able to enter the market.

Many  of  our  competitors  have  significantly  greater  financial  resources  and  expertise  in  research  and  development,  manufacturing,  preclinical  testing,
conducting clinical trials, obtaining regulatory approvals and marketing approved products than we do. Mergers and acquisitions in the pharmaceutical and
biotechnology  industries  may  result  in  even  more  resources  being  concentrated  among  a  smaller  number  of  our  competitors.  Smaller  and  clinical  stage
companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These third
parties compete with us in recruiting and retaining qualified scientific and management personnel, establishing clinical trial sites and patient registration for
clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

If the FDA does not grant our products, if and when approved, appropriate periods of data exclusivity before approving generic or follow-on versions
of our products, the sales of our products could be adversely affected.

With FDA approval of an NDA, the product covered by the application is specified as a “reference-listed drug” in the FDA’s publication, “Approved Drug
Products with Therapeutic Equivalence Evaluations,” or the Orange Book. Manufacturers may seek approval of generic versions of reference-listed drugs
through submission of abbreviated new drug applications, or ANDAs, in the United States.

In support of an ANDA, a generic manufacturer need not conduct clinical trials. Rather, the applicant generally must show that its product has the same
active ingredient(s), dosage form, strength, route of administration and conditions of use or labeling as the reference-listed drug and that the generic version
is  bioequivalent  to  the  reference-listed  drug,  meaning  it  is  absorbed  in  the  body  at  the  same  rate  and  to  the  same  extent.  Generic  products  may  be
significantly less costly to bring to market than the reference-listed drug and companies that produce generic products are generally able to offer them at
lower prices. Thus, following the introduction of a generic drug, a significant percentage of the sales of any reference-listed drug may be typically lost to
the generic product.

A manufacturer may also submit an NDA under section 505(b)(2) of the Federal Food, Drug and Cosmetic Act, or FDCA, that references the FDA’s prior
approval of the innovator product or preclinical studies and/or clinical trials that were not conducted by, or for, the applicant and for which the applicant has
not obtained a right of reference. A 505(b)(2) NDA product, or follow-product, may be for a new or improved version of the original reference listed drug.

The FDA may not approve an ANDA or 505(b)(2) NDA until any applicable period of non-patent exclusivity for the reference-listed drug has expired. The
FDCA provides a period of five years of new chemical entity exclusivity for a new drug containing a new active moiety. Specifically, in cases where such
exclusivity  has  been  granted,  an  ANDA  or  a  505(b)(2)  NDA  may  not  be  filed  with  the  FDA  until  the  expiration  of  five  years  unless  the  submission  is
accompanied by a Paragraph IV certification that a patent covering the reference-listed drug is either invalid or will not be infringed by the generic product,
in which case the applicant may submit its application four years following approval of the reference-listed drug. The FDCA also provides a period of three
years of new clinical investigation data exclusivity in connection with the approval of a supplemental indication for the product for which a clinical trial is
deemed by the FDA as essential for approval.

In the event that a generic or follow-on manufacturer is somehow able to obtain FDA approval without adherence to these periods of data exclusivity, the
competition that our approved products may face from generic and follow-on versions could

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negatively impact our future revenue, profitability and cash flows and substantially limit our ability to obtain a return on our investments in those product
candidates.

In addition, if there are patents listed for our drug products in the Orange Book, ANDAs and 505(b)(2) NDAs would be required to include a certification
as to each listed patent indicating whether the applicant intends to challenge the patent. We cannot predict which, if any, patents in our current portfolio or
patents we may obtain in the future will be eligible for listing in the Orange Book, how any generic or follow-on competitor would address such patents,
whether we would sue on any such patents or the outcome of any such suit.

Product  liability  lawsuits  against  us  or  any  collaborators  could  cause  us  or  our  collaborators  to  incur  substantial  liabilities  and  could  limit
commercialization of any medicines that we or they may develop.

We and any collaborators face a risk of product liability exposure related to our product candidates in human clinical trials and face an even greater risk as
we  or  they  commercially  sell  any  medicines,  including  PYRUKYND®.  If  we  or  any  collaborators  cannot  successfully  defend  ourselves  or  themselves
against  claims  that  our  product  candidates  or  medicines  caused  injuries,  we  or  they  could  incur  substantial  costs  and  liabilities.  Regardless  of  merit  or
eventual outcome, liability claims may also result in, among other thing, decreased demand for any product candidates or medicines that we may develop,
reputational harm and lost revenue.

Although we maintain product liability insurance coverage, it may not be adequate to cover all liabilities that we may incur.

Our  internal  computer  systems,  or  those  of  any  third  parties  with  which  we  contract,  may  fail  or  suffer  security  breaches,  which  could  result  in  a
material disruption of our product development programs.

Despite the implementation of security measures, our internal computer systems and those of third parties with which we contract are vulnerable to damage
from computer viruses, worms and other destructive or disruptive software, unauthorized access, natural disasters, terrorism, war and telecommunication
and  electrical  failures.  Such  systems  are  also  vulnerable  to  service  interruptions  or  to  security  breaches  from  inadvertent  or  intentional  actions  by  our
employees,  third-party  vendors  and/or  business  partners,  or  from  cyber  incidents  by  malicious  third  parties.  Cyber  incidents  are  increasing  in  their
frequency, sophistication and intensity, and have become increasingly difficult to detect. Cyber incidents could include the deployment of harmful malware,
ransomware,  denial-of-service  attacks,  unauthorized  access  to  or  deletion  of  files,  social  engineering  and  other  means  to  affect  service  reliability  and
threaten  the  confidentiality,  integrity  and  availability  of  information.  Cyber  incidents  also  could  include  phishing  attempts  or  e-mail  fraud  to  cause
payments  or  information  to  be  transmitted  to  an  unintended  recipient.  We  could  be  subject  to  risks  caused  by  misappropriation,  misuse,  leakage,
falsification  or  intentional  or  accidental  release  or  loss  of  information  maintained  in  the  information  systems  and  networks  of  our  company,  including
personal information of our employees.

System failures, accidents, cyber incidents or security breaches could cause interruptions in our operations, and could result in a material disruption of our
clinical and commercialization activities and business operations, whether due to a loss of our trade secrets or other proprietary information or other similar
disruptions, in addition to possibly requiring substantial expenditures of resources to remedy. For example, the loss of clinical trial data from completed or
future trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. To the extent that
any disruption or security breach were to result in a loss of, or damage to, our data or applications, or inappropriate disclosure of confidential or proprietary
information, we could incur liability, our competitive position could be harmed and our product research, development and commercialization efforts could
be delayed. In addition, we may not have adequate insurance coverage to provide compensation for any losses associated with such events.

If a material breach of our security or that of our vendors occurs, the market perception of the effectiveness of our security measures could be harmed, we
could lose business and our reputation and credibility could be damaged. We could be required to expend significant amounts of money and other resources
to  repair  or  replace  information  systems  or  networks.  Although  we  develop  and  maintain  systems  and  controls  designed  to  prevent  these  events  from
occurring, and we have a process to identify and mitigate threats, the development and maintenance of these systems, controls and processes is costly and
requires ongoing monitoring and updating as technologies change and efforts to overcome security measures become more sophisticated. Moreover, despite
our efforts, the possibility of these events occurring cannot be eliminated entirely.

Compliance with global privacy and data security requirements could result in additional costs and liabilities 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 penalties, which may have a material
adverse effect on our business, financial condition or results of operations.

The regulatory framework for the collection, use, safeguarding, sharing, transfer and other processing of information worldwide is rapidly evolving and is
likely to remain uncertain for the foreseeable future. Globally, virtually every jurisdiction in which we operate has established its own data security and
privacy  frameworks  with  which  we  must  comply.  For  example,  the  collection,  use,  disclosure,  transfer,  or  other  processing  of  personal  data  regarding
individuals in the EU, including personal health data, is

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subject to EU General Data Protection Regulation, or the GDPR, which applies to all member states of the European Economic Area, or EEA. The GDPR
is wide-ranging in scope and imposes numerous requirements on companies that process personal data. The GDPR imposes significant obligations on us
with respect to clinical trials conducted in the EEA. In addition, the GDPR also imposes strict rules on the transfer of personal data to countries outside the
EU, including the United States and, as a result, increases the scrutiny that clinical trial sites located in the EEA should apply to transfers of personal data
from  such  sites  to  countries  that  are  considered  to  lack  an  adequate  level  of  data  protection,  such  as  the  United  States.  The  GDPR  also  permits  data
protection authorities to require destruction of improperly gathered or used personal information and/or impose substantial fines for violations of GDPR,
and  it  also  confers  a  private  right  of  action  on  data  subjects  and  consumer  associations  to  lodge  complaints  with  supervisory  authorities,  seek  judicial
remedies and obtain compensation for damages resulting from violations of GDPR. In addition, the GDPR provides that EU member states may make their
own further laws and regulations limiting the processing of personal data, including genetic, biometric or health data.

Given the breadth and depth of changes in data protection obligations, preparing for and complying with the GDPR’s requirements is rigorous and time
intensive  and  requires  significant  resources  and  a  review  of  our  technologies,  systems  and  practices,  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 regulations
associated with the enhanced protection of certain types of sensitive data, such as healthcare data or other personal information from our clinical trials,
could require us to change our business practices and put in place additional compliance mechanisms, may interrupt or delay our development, regulatory
and  commercialization  activities  and  increase  our  cost  of  doing  business,  and  could  lead  to  government  enforcement  actions,  private  litigation  and
significant fines and penalties against us and could have a material adverse effect on our business, financial condition or results of operations. Similarly,
failure to comply with federal and state laws regarding privacy and security of personal information could expose us to fines and penalties under such laws.
Even  if  we  are  not  determined  to  have  violated  these  laws,  government  investigations  into  these  issues  typically  require  the  expenditure  of  significant
resources and generate negative publicity, which could harm our reputation and our business.

Similar privacy and data security requirements are either in place or underway in the United States. There are a broad variety of data protection laws that
are applicable to our activities, and a wide range of enforcement agencies at both the state and federal levels that can review companies for privacy and data
security concerns based on general consumer protection laws. The Federal Trade Commission and state Attorneys General all are aggressive in reviewing
privacy and data security protections for consumers. New laws also are being considered at both the state and federal levels. For example, the California
Consumer Privacy Act, which went into effect on January 1, 2020, is creating similar risks and obligations as those created by GDPR, though the California
Consumer  Privacy  Act  does  exempt  certain  information  collected  as  part  of  a  clinical  trial  subject  to  the  Federal  Policy  for  the  Protection  of  Human
Subjects (the Common Rule). Many other states are considering similar legislation. A broad range of legislative 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 information could
expose us to fines and penalties. We also face a threat of consumer class actions related to these laws and the overall protection of personal data. Even if we
are not determined to have violated these laws, government investigations into these issues typically require the expenditure of significant resources and
generate negative publicity, which could harm our reputation and our business.

Risks Related to Our Financial Position

We face new challenges as a smaller, less diversified company following the sale of our oncology business to Servier.

Following the sale of our oncology business to Servier in March 2021, we have focused our resources and efforts on product and product candidates for the
treatment of GDDs. The success of the GDD business is subject to various risks and uncertainties, including the possibility that we may not be able to
successfully commercialize PYRUKYND®, which only recently was approved by the FDA for the treatment of hemolytic anemia in adults with pyruvate
kinase (PK) deficiency in the United States, the possibility of adverse clinical and other developments in respect of PYRUKYND® or our other product
candidates of the GDD business, and unanticipated changes in applicable laws and regulations that may adversely affect the GDD business.

We developed most of our initial products and product candidates for the treatment of various types of cancer. The sale of our oncology business to Servier,
including our approved products at the time of sale, TIBSOVO® and IDHIFA®, has resulted in us being a smaller, less diversified company with a more
limited business concentrated on products and product candidates for the treatment of GDDs. As a result, we may be more susceptible to changing market
conditions,  including  fluctuations  and  risks  particular  to  the  markets  for  patients  with  GDDs,  than  a  more  diversified  company,  which  could  adversely
affect  our  business,  financial  condition  and  results  of  operations.  In  addition,  even  with  the  FDA  approval  of  PYRUKYND®  the  diversification  of  our
revenues, costs and cash flows has diminished following the transaction. Our results of operations, cash flows, working capital and financing requirements
may  be  subject  to  increased  volatility  and  our  ability  to  fund  capital  expenditures  and  investments  or  satisfy  other  financial  commitments  may  be
diminished.

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We have broad discretion as to the use of the proceeds from the sale of our oncology business to Servier, and we may not use the proceeds effectively.

We have broad discretion with respect to the use of proceeds of the sale of our oncology business to Servier. The results and effectiveness of the use of
proceeds,  including  the  repurchase  of  shares  of  our  common  stock,  are  uncertain,  and  we  could  spend  the  proceeds  in  ways  that  do  not  improve  our
remaining business, financial condition or results of operations. Our failure to apply these funds effectively could have an adverse effect on its business,
financial condition and results of operations.

Raising  additional  capital  may  cause  dilution  to  our  stockholders,  restrict  our  operations  or  require  us  to  relinquish  rights  to  our  technologies  or
product candidates.

Until  such  time,  if  ever,  as  we  can  generate  substantial  product  revenue,  including  from  sales  of  PYRUKYND®,  we  expect  to  finance  our  cash  needs
primarily through cash on hand, royalty payments from Servier with respect to U.S. net sales of TIBSOVO®, a potential milestone payment from Servier if
vorasidenib is approved by the FDA and, potentially, collaborations, strategic alliances, licensing arrangements and other nondilutive strategic transactions.
In addition, in connection with potential future strategic transactions, we may pursue opportunistic debt offerings, and equity or equity-linked offerings. We
do  not  have  any  committed  external  source  of  funds  other  than  the  potential  milestone  and  royalty  payments  that  we  are  eligible  to  receive  under  our
purchase  agreement  with  Servier.  To  the  extent  that  we  raise  additional  capital  through  the  sale  of  equity  or  convertible  debt  securities,  the  ownership
interest of our stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of
our common stockholders. Debt financing, if available, may require us to enter into agreements that include covenants limiting or restricting our ability to
take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. In addition, securing financing could require a
substantial amount of time and attention from our management and may divert a disproportionate amount of their attention away from day-to-day activities,
which may adversely affect our management’s ability to oversee the development of our product candidates.

If we raise funds through collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our
technologies, future revenue streams, research programs or product candidates or to grant licenses on terms that may not be favorable to us.

If our existing capital is insufficient to execute our operating plan through major catalysts and to cash-flow positivity, we will need to raise capital, and
if  we  are  unable  to  raise  capital  when  needed,  we  would  be  forced  to  delay,  reduce  or  eliminate  our  product  development  programs  or
commercialization efforts.

We expect to incur significant expenses as we continue to advance our ongoing activities. We expect to execute our operating plan through major catalysts
and  to  cash-flow  positivity  without  the  need  to  raise  additional  equity.  Our  estimate  as  to  how  long  we  expect  our  existing  cash,  cash  equivalents,  and
marketable securities to be available to fund our operating plan is based on assumptions that may prove to be wrong, and we could use our available capital
resources sooner than we currently expect. Further, changing circumstances, some of which may be beyond our control, could cause us to consume capital
significantly faster than we currently anticipate, and we may need to seek additional funds. Our future capital requirements will depend on many factors,
including:

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•

•

•

•

•

•

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•

•

•

the amount and timing of revenue received from commercial sales of PYRUKYND® and any of our other product candidates for which we may
receive marketing approval;

the amount of contingent consideration we ultimately receive in connection with the sale of our oncology business to Servier;

the  costs  and  timing  of  our  ongoing  commercialization  activities,  including  product  manufacturing,  sales,  marketing  and  distribution,  for
PYRUKYND® for the treatment of [adults with PK deficiency];

the scope, progress, results and costs of drug discovery, preclinical development, laboratory testing and clinical trials for our product candidates;

the costs, timing and outcome of regulatory review of our product candidates;

the  costs  of  preparing,  filing  and  prosecuting  patent  applications,  maintaining  and  enforcing  our  intellectual  property  rights  and  defending
intellectual property-related claims;

the  costs  and  timing  of  future  commercialization  activities,  including  product  manufacturing,  sales,  marketing  and  distribution,  for  any  of  our
product candidates for which we may receive marketing approval;

our ability to establish and maintain collaborations on favorable terms, if at all;

our ability to successfully execute on our strategic plans;

operational delays due to the COVID-19 pandemic; and

the extent to which we acquire or in-license, or monitor or out-license, other medicines and technologies.

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We have historically incurred operating losses. We expect to incur losses in the future and may never achieve or maintain profitability.

We have a history of incurring operating losses. Our net income for the year ended December 31, 2021 was $1,604.7 million and our net losses for the
years ended December 31, 2020 and 2019 were $327.4 million and $411.5 million, respectively. As of December 31, 2021, we had an accumulated deficit
of $238.8 million. Prior to the sale of our oncology business to Servier, we had generated only modest revenue from sales of TIBSOVO® and, prior to our
sale to Royalty Pharma of our royalty rights to IDHIFA®, from royalties on sales of IDHIFA®. We have only recently obtained marketing approval and
have begun to commercialize PYRUKYND® for the treatment of hemolytic anemia in adults with pyruvate kinase (PK) deficiency in the United States.
PYRUKYND®  is  the  first  product  we  have  received  marketing  approval  for  following  the  sale  of  our  oncology  business,  including  approved  products
TIBSOVO® and IDHIFA®, to Servier in March 2021. We have neither obtained marketing approval for PYRUKYND® in any other indications or for any
indication outside of the United States nor have we obtained marketing approval for any of our other product candidates, all of which are in preclinical or
clinical development stages. In June 2021, we submitted a MAA for PYRUKYND® in adults with PK deficiency to the EMA.

Prior  to  the  sale  of  our  oncology  business  to  Servier,  we  financed  our  operations  primarily  through  public  offerings  of  our  common  stock  and  our
collaboration agreements with Celgene and have devoted substantially all of our efforts to research and development. Following the sale of our oncology
business  to  Servier  on  March  31,  2021,  we  have  financed  and  expect  to  finance  our  operations  primarily  through  cash  on  hand,  royalty  payments  from
Servier with respect to U.S. net sales of TIBSOVO®, a potential milestone payment from Servier if vorasidenib is approved by the FDA, potential sales of
PYRUKYND®  and,  potentially,  collaborations,  strategic  alliances,  licensing  arrangements  and  other  nondilutive  strategic  transactions.  We  expect  to
continue  to  incur  significant  expenses  and  net  losses  until  such  time  as  we  are  able  to  report  profitable  results.  The  net  losses  we  incur  may  fluctuate
significantly from quarter to quarter. We anticipate that we will incur significant expenses if and as we:

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•

•

commercially launch PYRUKYND® for the treatment of [adults with PK deficiency] in the United States;

continue to establish and maintain a sales, marketing and distribution infrastructure to commercialize PYRUKYND® and other product candidates
for which we may obtain marketing approval;

initiate and continue clinical trials for our products and product candidates, including PYRUKYND® in other indications; continue our research
and preclinical development of our product candidates and seek to identify additional product candidates;

seek marketing approvals for our product candidates that successfully complete clinical trials;

require the manufacture of larger quantities of product candidates for clinical development and commercialization;

• maintain, expand and protect our intellectual property portfolio;

•

•

•

add additional personnel to support our product research and development and planned future commercialization efforts and our operations;

add equipment and physical infrastructure to support our research and development; and

acquire or in-license other medicines and technologies.

To  become  and  remain  profitable,  we  must  develop  and  successfully  commercialize  one  or  more  medicines  with  significant  market  potential.  This  will
require  us  to  be  successful  in  a  range  of  challenging  activities,  including  completing  preclinical  testing  and  clinical  trials  of  our  product  candidates,
obtaining  marketing  approval  for  these  product  candidates,  manufacturing,  marketing  and  selling  those  medicines  for  which  we  may  obtain  marketing
approval and satisfying any post-marketing requirements. Notwithstanding the extent to which we may succeed in any of these activities, we may never
generate  revenues  that  are  significant  or  large  enough  to  achieve  profitability.  If  we  do  achieve  profitability,  we  may  not  be  able  to  sustain  or  increase
profitability on a quarterly or annual basis. Our failure to become and remain profitable would decrease the value of our company and could impair our
ability  to  raise  capital,  maintain  our  research  and  development  efforts,  expand  our  business  or  continue  our  operations.  A  decline  in  the  value  of  our
company could also cause our stockholders to lose all or part of their investment.

The amount of contingent consideration we will receive from the sale of our oncology business to Servier is subject to various risks and uncertainties.

Upon  closing  of  the  sale  of  our  oncology  business  to  Servier,  Servier  assumed  certain  liabilities  with  respect  to  the  oncology  business  and  paid  to  us:
approximately $1.8 billion in cash, net of certain adjustments for the working capital of the oncology business at the time of closing of the transaction and
amounts for a representation and warranty insurance policy. In addition, Servier will pay to us:

•

$200  million  in  cash  if,  prior  to  January  1,  2027,  vorasidenib  is  granted  approval  for  a  new  drug  application,  or  NDA,  from  the  FDA  with  an
approved label that permits vorasidenib’s use as a single agent for the adjuvant treatment of

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patients  with  Grade  2  glioma  that  have  an  IDH1  or  IDH2  mutation  (and,  to  the  extent  required  by  such  approval,  the  vorasidenib  companion
diagnostic test is granted an FDA premarket approval);

•

•

a royalty payment of 5% of the U.S. net sales (as defined in the purchase agreement with Servier) of TIBSOVO® from the completion of the
transaction through loss of exclusivity of TIBSOVO®; and

a royalty payment of 15% of the U.S. net sales (as defined in the purchase agreement with Servier) of vorasidenib from its first commercial sale
through loss of exclusivity of vorasidenib.

The contingent consideration described above is subject to various risks and uncertainties.

Whether the regulatory approval milestone will be achieved prior to January 1, 2027 is subject to various risks and uncertainties, many of which are outside
of the control of the parties, including adverse clinical developments with respect to vorasidenib.

In  addition,  we  cannot  predict  what  success,  if  any,  Servier  may  have  in  the  United  States  with  respect  to  sales  of  TIBSOVO®  and  vorasidenib,  if
approved, and, therefore, the amount of royalty payments that we can expect to receive from Servier under the terms of the purchase agreement prior to the
loss of exclusivity of these products. The royalty payments are also subject to deductions and other adjustments under the terms of the purchase agreement,
the amounts of which are uncertain as of the date of this report.

Changes in tax laws or in their implementation or interpretation may adversely affect our business and financial condition.

Changes in tax law may adversely affect our business or financial condition. On December 22, 2017, the U.S. government enacted the Tax Cuts and Jobs
Act, or the Tax Act, which significantly reformed the U.S. Internal Revenue Code of 1986, as amended, or the Code. The Tax Act, among other things,
contained significant changes to corporate taxation.

As part of Congress’ response to the COVID-19 pandemic, the Families First Coronavirus Response Act, or FFCR Act, was enacted on March 18, 2020,
the Coronavirus Aid, Relief, and Economic Security Act, or CARES Act, was enacted on March 27, 2020, COVID-19 relief provisions were included in
the Consolidated Appropriations Act, 2021, or CAA, which was enacted on December 27, 2020 and the American Rescue Plan Act of 2021, or ARPA, was
enacted on March 11, 2021. All contain numerous tax provisions. Regulatory guidance under the Tax Act, the FFCR Act, the CARES Act, the CAA and the
ARPA  is  and  continues  to  be  forthcoming,  and  such  guidance  could  ultimately  increase  or  lessen  impact  of  these  laws  on  our  business  and  financial
condition. It is possible that Congress will enact additional legislation in connection with the COVID-19 pandemic. Furthermore, as a result of the changes
in the U.S. presidential administration and control of the U.S. Senate, it is possible that additional tax legislation will be enacted. Such legislation could
have an impact on our company. In addition, it is uncertain if and to what extent various states will conform to the Tax Act, the FFCR Act, the CARES Act,
the CAA or the ARPA.

Risks Related to Our Dependence on Third Parties

We may depend on collaborations with third parties for the development and commercialization of our product candidates. If those collaborations are
not successful, we may not be able to capitalize on the market potential of these product candidates.

We may seek collaborations for the development and commercialization of our product candidates with large and mid-size pharmaceutical companies and
biotechnology  companies.  We  face  significant  competition  in  seeking  appropriate  collaborators.  Collaborations  are  complex  and  time-consuming  to
negotiate  and  document.  Whether  we  reach  a  definitive  agreement  for  a  collaboration  will  depend,  among  other  things,  upon  our  assessment  of  the
collaborator’s resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s evaluation of a number of
factors. We may not be able to negotiate collaborations on a timely basis, on acceptable terms, or at all. Collaborators may have rights that restrict us from
entering into future agreements on certain terms with potential collaborators.

If  we  enter  into  any  such  arrangements  with  collaborators,  we  will  likely  have  limited  control  over  the  amount  and  timing  of  resources  that  our
collaborators  dedicate  to  the  development  or  commercialization  of  our  product  candidates.  Collaborators  may  not  pursue  development  and
commercialization  of  our  product  candidates  or  may  elect  not  to  continue  or  renew  development  or  commercialization  programs  based  on  clinical  trial
results,  changes  in  the  collaborator’s  strategic  focus  or  available  funding  or  external  factors  such  as  an  acquisition  that  diverts  resources  or  creates
competing  priorities.  Collaborators  may  delay  clinical  trials,  provide  insufficient  funding  for  a  clinical  trial  program,  stop  a  clinical  trial  or  abandon  a
product candidate, repeat or conduct new clinical trials or require a new formulation of a product candidate for clinical testing, which may result in a need
for additional capital to pursue further development or commercialization of the applicable product candidate. Collaborators may not properly maintain or
defend our intellectual property rights or may use our proprietary information in such a way as to invite litigation that could jeopardize or invalidate our
proprietary information or expose us to potential litigation. Disputes may arise between the collaborators and us that result in the delay or termination of the
research, development or commercialization

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of our medicines or product candidates or that result in costly litigation or arbitration that diverts management attention and resources.

Our ability to generate revenue from these arrangements will depend on our collaborators’ abilities to successfully perform the functions assigned to them
in these arrangements.

We rely and expect to continue to rely on third parties to conduct our clinical trials and some aspects of our research and preclinical testing, and those
third parties may not perform satisfactorily, including failing to meet deadlines for the completion of such trials, research or testing.

We do not independently conduct clinical trials of any of our product candidates. We rely and expect to continue to rely on third parties, such as CROs,
clinical  data  management  organizations,  medical  institutions  and  clinical  investigators,  to  conduct  our  clinical  trials.  In  addition,  we  currently  rely  and
expect to continue to rely on third parties to conduct some aspects of our research and preclinical testing. Any of these third parties may terminate their
engagements with us, some in the event of an uncured material breach and some at any time. If any of our relationships with these third parties terminate,
we may not be able to enter into similar arrangements with alternative third-parties or to do so on commercially reasonable terms. Switching or adding
additional  third  parties  involves  additional  cost  and  requires  management  time  and  focus.  As  a  result,  delays  may  occur  in  our  product  development
activities. Although we seek to carefully manage our relationships with our CROs, we could encounter such challenges or delays that could have a material
adverse impact on our business, financial condition and prospects.

Our reliance on third parties for research and development activities reduces our control over these activities but does not relieve us of our responsibilities.
For example, we are responsible for ensuring that each of our studies is conducted in accordance with the applicable protocol and legal, regulatory and
scientific standards, and our reliance on third parties does not relieve us of our responsibility to comply with any such standards. We and these third parties
are required to comply with current good clinical practices, or cGCP, which are regulations and guidelines enforced by the FDA, the Competent Authorities
of  the  Member  States  of  the  European  Economic  Area  and  comparable  foreign  regulatory  authorities  for  all  of  our  product  candidates  in  clinical
development. Regulatory authorities enforce these cGCPs through periodic inspections of trial sponsors, principal investigators and trial sites. If we or any
of these third parties fail to comply with applicable cGCPs, the clinical data generated in our clinical trials may be deemed unreliable and the FDA, the
EMA, or comparable foreign regulatory authorities may require us to perform additional clinical trials before approving our marketing applications. We
cannot assure you a given regulatory authority will determine that any of our clinical trials comply with cGCP regulations. We also are required to register
ongoing  clinical  trials  and  post  the  results  of  completed  clinical  trials  on  a  U.S.  government-sponsored  database,  clinicaltrials.gov,  within  certain
timeframes. Failure to do so can result in fines, adverse publicity and civil and criminal sanctions. We are exposed to risk of fraud or other misconduct by
such third parties.

Furthermore, third parties on whom we rely may also have relationships with other entities, some of which may be our competitors. In addition, these third
parties are not our employees, and except for remedies available to us under our agreements with such third parties, we cannot control whether or not they
devote sufficient time and resources to our on-going clinical, nonclinical and preclinical programs.

If these third parties do not successfully carry out their contractual duties or obligations or meet expected deadlines, if they need to be replaced or if the
quality or accuracy of the clinical data they obtain is compromised, our clinical trials may be extended, delayed or terminated and we may not be able to
obtain,  or  may  be  delayed  in  obtaining,  marketing  approvals  for  our  product  candidates  and  will  not  be  able  to,  or  may  be  delayed  in  our  efforts  to,
successfully commercialize our medicines.

We also rely and expect to continue to rely on other third parties to store and distribute drug supplies for our clinical trials. Any performance failure on the
part of our distributors could delay clinical development or marketing approval of our product candidates or commercialization of our medicines, producing
additional losses and depriving us of potential product revenue.

We contract with third parties for the manufacture of our product candidates for preclinical and clinical testing for commercialization.

We  do  not  have  any  manufacturing  facilities.  We  currently  rely,  and  expect  to  continue  to  rely,  on  third-party  manufacturers  for  the  materials  and
manufacture  of  our  product  candidates  for  preclinical  and  clinical  testing  and  for  commercial  supply  of  PYRUKYND®  and  any  product  candidate  for
which we or our collaborators obtain marketing approval.

Although  we  have  entered  into  long-term  supply  agreements  for  commercial  supply  of  PYRUKYND®  with  third-party  manufacturers  ahead  of  its
commercial  launch,  we  may  be  unable  to  establish  similar  long-term  supply  agreements  with  third-party  manufacturers  with  respect  to  our  other  GDD
product  candidates  or  to  do  so  on  acceptable  terms.  Even  if  we  are  able  to  establish  agreements  with  third-party  manufacturers,  reliance  on  third-party
manufacturers entails additional risks, including:

•

reliance on the third party for regulatory compliance, quality assurance, environmental and safety and pharmacovigilance reporting;

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•

•

the possible breach of the manufacturing agreement by the third party; and

the possible termination or nonrenewal of the agreement by the third party at a time that is costly or inconvenient for us.

Third-party manufacturers may not be able to comply with current cGMPs. regulations or similar regulatory requirements on a global basis. Our failure, or
the  failure  of  our  third-party  manufacturers,  to  comply  with  applicable  regulations  could  result  in  sanctions  being  imposed  on  us,  including  fines,
injunctions,  civil  penalties,  delays,  suspension  or  withdrawal  of  approvals,  license  revocation,  seizures  or  recalls  of  product  candidates  or  medicines,
operating restrictions and criminal prosecutions, any of which could significantly and adversely affect supplies of our medicines and harm our business and
results of operations.

We  have  been  monitoring  our  supply  chain  network  for  any  disruptions  due  to  the  COVID-19  pandemic,  and  our  manufacturers  have  remained  largely
unaffected, with any campaign delays experienced to date being limited to a few days in duration. Although global shipping continues to be disrupted due
to the pandemic, we have not yet experienced a supply impact. If either we or any third parties on which we rely are adversely impacted by restrictions
resulting  from  the  COVID-19  pandemic,  our  supply  chain  may  be  disrupted,  limiting  our  ability  to  manufacture  our  product  candidates  for  our  clinical
trials and research and development operations and our product for commercialization.

Any performance failure on the part of our existing or future manufacturers could delay clinical development, marketing approval or our commercialization
efforts. We do not currently have arrangements in place for redundant supply for drug product. If any one of our current contract manufacturers cannot
perform as agreed, we may be required to replace that manufacturer. Although we believe that there are several potential alternative manufacturers who
could manufacture our product or our product candidates, we may incur added costs and delays in identifying and qualifying any such replacement.

Our current and anticipated future dependence upon others for the manufacture of our product candidates or medicines may adversely affect our future
profit margins and our ability to commercialize any medicines that receive marketing approval on a timely and competitive basis.

Risks Related to Our Intellectual Property

If we are unable to obtain and maintain patent or trade secret protection for our medicines and technology, or if the scope of the patent protection
obtained  is  not  sufficiently  broad,  our  competitors  could  develop  and  commercialize  medicines  and  technology  similar  or  identical  to  ours,  and  our
ability to successfully commercialize our medicines and technology may be adversely affected.

Our  success  depends  in  large  part  on  our  ability  to  obtain  and  maintain  patent  protection  in  the  United  States  and  other  countries  with  respect  to  our
proprietary medicines and technology. We seek to protect our proprietary position by filing patent applications in the United States and abroad related to
our novel technologies and medicines that are important to our business. We do not yet have issued patents for all our most advanced product candidates in
all markets in which we intend to commercialize but we continue to actively pursue patent protection for our assets around the world.

The patent prosecution process is costly and time-consuming, and we may not be able to file and prosecute all necessary or desirable patent applications at
a reasonable cost or in a timely manner. It is also possible that we will fail to identify and/or file patent applications on every aspect of our research and
development output that is or may be eligible for patent protection. Although we enter into non-disclosure and confidentiality agreements with parties who
may  have  access  to  patentable  aspects  of  our  research  and  development  output,  such  as  our  employees,  corporate  collaborators,  outside  scientific
collaborators,  contract  research  organizations,  contract  manufacturers,  consultants,  advisors  and  other  third  parties,  any  of  these  parties  may  breach  the
agreements  and  disclose  such  output  before  a  patent  application  is  filed,  thereby  jeopardizing  our  ability  to  seek  patent  protection.  There  is  also  the
possibility that loss or theft of data or records may jeopardize the ability to seek patent protection or impede the progress or drafting of patent applications.

We have licensed patent rights, and in the future may license additional patent rights, from third parties. Such licenses may be accompanied by milestone
and/or royalty payment obligations. These licensed patent rights may be valuable to our business, and we may not have the right to control the preparation,
filing and prosecution of patent applications, or to maintain the patents, covering technology or medicines underlying such licenses. We cannot be certain
that these patents and applications will be prosecuted and enforced in a manner consistent with the best interests of our business. If any such licensors fail
to  maintain  such  patents,  or  lose  rights  to  those  patents,  the  rights  we  have  licensed  may  be  reduced  or  eliminated  and  our  right  to  develop  and
commercialize any of our products that are the subject of such licensed rights could be adversely affected. In addition to the foregoing, the risks associated
with patent rights that we license from third parties also apply to patent rights we own.

The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and has in
recent  years  been  the  subject  of  much  litigation.  As  a  result,  the  issuance,  scope,  validity,  enforceability  and  commercial  value  of  our  patent  rights  are
highly uncertain. Our pending and future patent applications may

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not result in patents being issued that protect our technology or medicines or that effectively prevent others from commercializing competitive technologies
and medicines. Changes in either the patent laws or interpretation of the patent laws in the United States and other countries may diminish the value of our
patents or narrow the scope of our patent protection. The laws of foreign countries may not protect our rights to the same extent as the laws of the United
States. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and other
jurisdictions are typically not published until 18 months after filing, or in some cases not at all. Therefore we cannot be certain that we were the first to
make the inventions claimed in our owned or licensed patents or pending patent applications, or that we were the first to file for patent protection of such
inventions.

Assuming the other requirements for patentability are met, prior to March 2013, in the United States, the first to make the claimed invention was entitled to
the  patent,  while  outside  the  United  States,  the  first  to  file  a  patent  application  was  entitled  to  the  patent.  Beginning  in  March  2013,  the  United  States
transitioned  to  a  first  inventor  to  file  system  in  which,  assuming  the  other  requirements  for  patentability  are  met,  the  first  inventor  to  file  a  patent
application will be entitled to the patent. We may be subject to a third-party pre-issuance submission of prior art to the U.S. Patent and Trademark Office,
or  USPTO,  or  become  involved  in  opposition,  derivation,  revocation,  reexamination,  post-grant  and  inter  partes  review  or  interference  proceedings
challenging  our  patent  rights  or  the  patent  rights  of  others.  An  adverse  determination  in  any  such  submission,  proceeding  or  litigation  could  reduce  the
scope of, or invalidate, our patent rights, allow third parties to commercialize our technology or products and compete directly with us, without payment to
us, or result in our inability to manufacture or commercialize medicines without infringing third-party patent rights.

Even if our patent applications issue as patents, they may not issue in a form that will provide us with any meaningful protection, prevent competitors or
other third parties from competing with us or otherwise provide us with any competitive advantage. Our competitors or other third parties may be able to
circumvent our patents by developing similar or alternative technologies or products in a non-infringing manner.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our patents may be challenged in the courts or patent
offices in the United States and abroad. Such challenges may result in loss of the patent or in one or more patent claims being narrowed or invalidated,
which could limit our ability to stop others from using or commercializing similar or identical technology and products, or limit the duration of the patent
protection of our technology and medicines. Given the significant amount of time required for the discovery, development, preclinical and clinical testing
and regulatory review and approval of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are
commercialized. As a result, our intellectual property may not provide us with sufficient rights to exclude others from commercializing products similar or
identical to ours. In such circumstances we would be relying primarily on regulatory or marketing exclusivity to exclude others from commercializing a
generic version of our products.

We may become involved in lawsuits to protect or enforce our patents and other intellectual property rights, which could be expensive, time consuming
and unsuccessful.

Competitors  may  infringe  our  patents  and  other  intellectual  property  rights.  To  counter  infringement  or  unauthorized  use,  we  may  be  required  to  file
infringement claims, which can be expensive and time consuming. In addition, in an infringement proceeding, a court may decide that a patent of ours is
invalid  or  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  question.  An  adverse  result  in  any  litigation  proceeding  could  put  one  or  more  of  our  patents  at  risk  of  being  invalidated  or  interpreted
narrowly. Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some
of our confidential information could be compromised by disclosure during this type of litigation.

Third parties may initiate legal proceedings alleging that we or our collaborators are infringing their intellectual property rights, the outcome of which
would be uncertain and could have a material adverse effect on the success of our business.

The  biotechnology  and  pharmaceutical  industries  are  characterized  by  extensive  litigation  regarding  patents  and  other  intellectual  property  rights.  Our
commercial  success  depends  upon  our  ability  and  the  ability  of  our  collaborators  to  develop,  manufacture,  market  and  sell  our  product  and  product
candidates and use our proprietary technologies without infringing the proprietary rights and intellectual property of third parties. We have in the past and
may  in  the  future  become  party  to,  or  threatened  with,  adversarial  proceedings  or  litigation  regarding  intellectual  property  rights  with  respect  to  our
medicines  and  technology,  including  opposition,  derivation,  revocation,  reexamination,  post-grant  and  inter  partes  review  or  interference  proceedings
before the USPTO or other patent offices around the world. For example, in 2011, The Leonard and Madlyn Abramson Family Cancer Research Institute at
the Abramson Cancer Center of the University of Pennsylvania initiated a lawsuit against us, one of our founders, Craig B. Thompson, M.D., and Celgene,
alleging misappropriation of intellectual property and, in 2012, the Trustees of the University of Pennsylvania initiated a similar lawsuit against us and Dr.
Thompson. Each of these lawsuits was settled in 2012. We are not aware of any other legal proceedings having been filed against us to date. Third parties
may assert infringement claims against us based on existing patents or patents that may be granted in the future. If we or one of our collaborators are found
to infringe a third party’s intellectual property rights, we or they could be required to

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obtain a license from such third party to continue developing and marketing our medicines and technology. However, we or our collaborators may not be
able to obtain any required license on commercially reasonable terms or at all. Even if we or our collaborators were able to obtain a license, it could be non-
exclusive, thereby giving our competitors and other third parties access to the same technologies licensed to us. We or our collaborators could be forced,
including by court order, to cease developing and commercializing the infringing technology or medicine. In addition, we or our collaborators could be
found  liable  for  monetary  damages.  A  finding  of  infringement  could  prevent  us  or  our  collaborators  from  commercializing  our  product  and  product
candidates  or  force  us  to  cease  some  of  our  business  operations,  which  could  materially  harm  our  business.  Claims  that  we  or  our  collaborators  have
misappropriated the confidential information or trade secrets of third parties could have a similar negative impact on our business.

We may be subject to claims that our employees have wrongfully used or disclosed alleged trade secrets of their former employers.

Many  of  our  employees,  consultants  or  advisors  are  currently  or  were  previously  employed  at  universities  or  other  biotechnology  or  pharmaceutical
companies,  including  our  competitors  or  potential  competitors.  Although  we  try  to  ensure  that  our  employees,  consultants  and  advisors  do  not  use  the
proprietary  information  or  know-how  of  others  in  their  work  for  us,  we  may  be  subject  to  claims  that  we  or  these  individuals  have  used  or  disclosed
intellectual  property,  including  trade  secrets  or  other  proprietary  information,  of  any  such  individual’s  current  or  former  employer.  Litigation  may  be
necessary  to  defend  against  these  claims.  If  we  fail  in  defending  any  such  claims,  in  addition  to  paying  monetary  damages,  we  may  lose  valuable
intellectual property rights or personnel. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a
distraction to our organization.

Intellectual property litigation could cause us to spend substantial resources and distract our personnel from their normal responsibilities.

Even if resolved in our favor, litigation or other legal proceedings relating to intellectual property claims may cause us to incur significant expenses, and
could distract our technical and management personnel from their normal responsibilities. In addition, there could be public announcements of the results
of hearings, motions or other interim proceedings or developments and if securities analysts or investors perceive these results to be negative, it could have
a substantial adverse effect on the price of our common stock. Such litigation or proceedings could substantially increase our operating losses and reduce
the resources available for development activities or any future sales, marketing or distribution activities. We may not have sufficient financial or other
resources to adequately conduct such litigation or proceedings. Some of our competitors may be able to sustain the costs of such litigation or proceedings
more  effectively  than  we  can  because  of  their  greater  financial  resources  and  more  mature  and  developed  intellectual  property  portfolios.  Uncertainties
resulting from the initiation and continuation of patent litigation or other proceedings could have a material adverse effect on our ability to compete in the
marketplace.

If we are unable to protect the confidentiality of our confidential information related to our proprietary platforms and technology, our business and
competitive position could be harmed.

In  addition  to  seeking  patents  for  some  of  our  technology  and  medicines,  we  also  rely  on  maintaining  the  confidentiality  of  unpatented  know-how,
technology and other proprietary information, to maintain our competitive position. For example, we consider the confidential information and know-how
related  to  our  cellular  metabolism  technology  platform  to  be  our  primary  intellectual  property  assets  in  this  space.  Unpatented  proprietary  technical
information and know-how can be difficult to protect.

We seek to protect this proprietary technical information and know-how, in part, by entering into non-disclosure and confidentiality agreements with parties
who  have  access  to  them,  such  as  our  employees,  corporate  collaborators,  outside  scientific  collaborators,  contract  research  organizations,  contract
manufacturers,  consultants,  advisors  and  other  third  parties.  We  also  enter  into  confidentiality  and  invention  or  patent  assignment  agreements  with  our
employees and consultants. Despite these efforts, any of these parties may breach the agreements and disclose our proprietary information, and we may not
be  able  to  obtain  adequate  remedies  for  such  breaches.  Enforcing  a  claim  that  a  party  illegally  disclosed  or  misappropriated  proprietary  information  is
difficult,  expensive  and  time-consuming,  and  the  outcome  is  unpredictable.  If  any  of  our  proprietary  technical  information  and  know-how  were  to  be
lawfully obtained or independently developed by a competitor or other third party, we would have no right to prevent them from using that technology or
information to compete with us. Moreover, we anticipate that with respect to this platform, at least some of this technical information and know-how will,
over time, be disseminated within the industry through independent development, the publication of journal articles describing the methodology, and the
movement of personnel skilled in the art from academic to industry scientific positions.

Risks Related to Regulatory Approval of Our Product Candidates and Other Legal Compliance Matters

Even if we complete necessary preclinical studies and clinical trials, the marketing approval process is expensive, time-consuming and uncertain and
may prevent us from obtaining approvals for the commercialization of some or all of our product candidates. If we or our collaborators are not able to
obtain, or if there are delays in obtaining, required regulatory

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approvals,  we  or  they  will  not  be  able  to  commercialize,  or  will  be  delayed  in  commercializing,  our  product  candidates,  and  our  ability  to  generate
revenue will be materially impaired.

Our  product  candidates  and  the  activities  associated  with  their  development  and  commercialization,  including  their  design,  testing,  manufacture,  safety,
efficacy,  record  keeping,  labeling,  storage,  approval,  advertising,  promotion,  sale  and  distribution,  export  and  import,  are  subject  to  comprehensive
regulation by the FDA and other regulatory agencies in the United States and by the EMA and comparable regulatory authorities in other countries. With
the exception of the FDA approval of PYRUKYND®, for the treatment of hemolytic anemia in adults with pyruvate kinase (PK) deficiency in the United
States, we have not received approval to market any of our current product candidates from regulatory authorities in any jurisdiction.

Securing  marketing  approval  requires  the  submission  of  extensive  preclinical  and  clinical  data  and  supporting  information  to  the  various  regulatory
authorities for each therapeutic indication to establish the product candidate’s safety and efficacy. Securing regulatory approval also requires the submission
of  information  about  the  product  manufacturing  process  to,  and  inspection  of  manufacturing  facilities  by,  the  relevant  regulatory  authority.  Our  product
candidates  may  not  be  effective,  may  be  only  moderately  effective  or  may  prove  to  have  undesirable  or  unintended  side  effects,  toxicities  or  other
characteristics that may preclude our obtaining marketing approval or prevent or limit commercial use.

The FDA, EMA and other foreign regulatory authorities have substantial discretion in the approval process. Accordingly, it is possible that the FDA or
EMA may refuse to accept for substantive review any NDA, sNDA or MAA that we submit for our product candidates, or may conclude after review of
our  data  that  our  marketing  application  is  insufficient  to  obtain  marketing  approval  of  our  product  candidates,  including  with  respect  to  the  MAA  for
PYRUKYND®  that  is  currently  under  review  by  the  EMA.  If  the  FDA  or  EMA  does  not  accept  or  approve  our  applications  for  any  of  our  product
candidates, the applicable regulator may require that we conduct additional clinical trials, preclinical studies or manufacturing validation studies and submit
that data before reconsidering our applications. Depending on the extent of these or any other FDA- or EMA-required trials or studies, approval of any
marketing applications that we submit may be delayed by several years, or may require us to expend more resources than we planned. It is also possible
that additional trials or studies, if performed and completed, may not be considered sufficient by the FDA or EMA to approve any marketing applications.
We may not be successful in obtaining FDA or EMA approval of our product candidates on a timely basis, or ever. We have limited experience in filing and
supporting  the  applications  necessary  to  gain  marketing  approvals  and  expect  to  rely  on  third-party  contract  research  organizations  to  assist  us  in  this
process, and failure to obtain marketing approval for our product candidates will prevent us from commercializing the product candidate in the applicable
jurisdictions.

Further, the process of obtaining marketing approvals, both in the United States and abroad, is expensive, may take many years if additional clinical trials
are required, if approval is obtained at all, and can vary substantially based upon a variety of factors, including the type, complexity and novelty of the
product candidates involved. Changes in marketing approval policies during the development period, changes in or the enactment of additional statutes or
regulations,  or  changes  in  regulatory  review  for  each  submitted  product  application,  may  cause  delays  in  the  approval  or  rejection  of  an  application.  In
addition,  varying  interpretations  of  the  data  obtained  from  preclinical  and  clinical  testing  could  delay,  limit  or  prevent  marketing  approval  of  a  product
candidate. Any marketing approval we or our collaborators ultimately obtain may be limited or subject to restrictions or post-approval commitments that
render the approved medicine not commercially viable.

In  addition,  the  COVID-19  pandemic  may  continue  to  disrupt  the  U.S.  and  international  healthcare  and  regulatory  systems.  These  disruptions  could
materially delay the review of, and/or decision making with respect to, marketing approvals for our product candidates. Any delay in regulatory review or
decision making resulting from such disruptions could materially affect the development of our product candidates.

Disruptions at the FDA and other agencies may prolong the time necessary for regulatory submissions to be reviewed and/or new drugs to be approved by
necessary government agencies, which would adversely affect our business. For example, over the last several years, the U.S. government has shut down
several  times  and  certain  regulatory  agencies,  such  as  the  FDA,  have  had  to  furlough  critical  employees  and  stop  critical  activities.  If  a  prolonged
government shutdown were to occur, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, which
could have a material adverse effect on our business. Should the FDA determine that an inspection is necessary for approval of a regulatory submission and
an  inspection  cannot  be  completed  during  the  review  cycle  due  to  restrictions  on  travel  due  to  COVID-19,  and  the  FDA  does  not  determine  a  remote
interactive  evaluation  to  be  adequate,  the  FDA  has  stated  that  it  generally  intends  to  issue  a  complete  response  letter  or  defer  action  on  the  regulatory
submission until an inspection can be completed.

If  we  or  our  collaborators  experience  delays  in  obtaining  approval  or  if  we  or  they  fail  to  obtain  approval  of  our  product  candidates,  the  commercial
prospects for our product candidates may be harmed and our ability to generate revenue will be materially impaired.

Failure to obtain marketing approval in foreign jurisdictions would prevent our medicines from being marketed in such jurisdictions and any of our
medicines that are approved for marketing in such jurisdiction will be subject to risk associated with foreign operations.

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In order to market and sell our medicines in the EU and many other foreign jurisdictions, we or our collaborators must obtain separate marketing approvals
and comply with numerous and varying regulatory requirements. The approval procedure varies among countries and can involve additional testing. The
time required to obtain approval may differ substantially from that required to obtain FDA approval. The regulatory approval process outside the United
States generally includes all of the risks associated with obtaining FDA approval. In addition, in many countries outside the United States, a product must
be  approved  for  reimbursement  before  the  product  can  be  approved  for  sale  in  that  country.  We  or  our  collaborators  may  not  obtain  approvals  from
regulatory  authorities  outside  the  United  States  on  a  timely  basis,  if  at  all.  Moreover,  approval  by  the  FDA  does  not  ensure  approval  by  regulatory
authorities in other countries or jurisdictions, and approval by one regulatory authority outside the United States does not ensure approval by regulatory
authorities in other countries or jurisdictions or by the FDA. We may not be able to file for marketing approvals and may not receive necessary approvals to
commercialize our medicines in any market.

Additionally, we could face heightened risks with respect to seeking marketing approval in the United Kingdom as a result of the withdrawal of the United
Kingdom from the EU on December 31, 2020, commonly referred to as Brexit. On December 24, 2020, the United Kingdom and EU entered into a Trade
and  Cooperation  Agreement,  which  sets  out  certain  procedures  for  approval  and  recognition  of  medical  products  in  each  jurisdiction,  and  the  United
Kingdom and EU continue to work on the rules for implementation. Since the regulatory framework for pharmaceutical products in the United Kingdom
covering  the  quality,  safety,  and  efficacy  of  pharmaceutical  products,  clinical  trials,  marketing  authorization,  commercial  sales,  and  distribution  of
pharmaceutical products is derived from EU directives and regulations, the consequences of Brexit and the impact the future regulatory regime that applies
to products and the approval of product candidates in the United Kingdom remains unclear. Any delay in obtaining, or an inability to obtain, any marketing
approvals, as a result of Brexit or otherwise, would prevent us from commercializing any product candidates in the United Kingdom and/or the EU and
restrict our ability to generate revenue and achieve and sustain profitability, which could significantly and materially harm our business.

We expect that we will be subject to additional risks in commercializing any of our product candidates that receive marketing approval outside the United
States,  including  tariffs,  trade  barriers  and  regulatory  requirements;  economic  weakness,  including  inflation,  or  political  instability  in  particular  foreign
economies  and  markets;  compliance  with  tax,  employment,  immigration  and  labor  laws  for  employees  living  or  traveling  abroad;  foreign  currency
fluctuations, which could result in increased operating expenses and reduced revenue, and other obligations incident to doing business in another country;
and  workforce  uncertainty  in  countries  where  labor  unrest  is  more  common  than  in  the  United  States.  In  addition,  we  do  not  have  experience
commercializing products outside of the United States and such efforts may depend on our ability to find a suitable collaborator.

Fast track designation and/or priority review designation by the FDA or PRIME designation in the EU may not actually lead to a faster development or
regulatory review or approval process, nor does it assure approval of the product candidate by the FDA or the EMA.

We may seek fast track designation, priority review designation and/or PRIME designation for our product candidates.

If a product candidate is intended for the treatment of a serious or life-threatening disease or condition and the product candidate demonstrates the potential
to address unmet medical needs for this disease or condition, the drug sponsor may apply for FDA fast track designation.

Further, if the FDA determines that a product candidate offers major advances in treatment or provides a treatment where no adequate therapy exists, the
FDA may designate the product candidate for priority review. A priority review designation means that the goal for the FDA to review an application is six
months, rather than the standard review period of ten months. Receiving priority review from the FDA does not guarantee approval within the six-month
review cycle or thereafter.

The FDA has broad discretion on whether to grant fast track designation and/or priority review designation to a product candidate, so even if we believe a
particular product candidate is eligible for such designation or status, the FDA may decide not to grant it. Even if our product candidates receive fast track
designation and/or priority review designation, we may not experience a faster development process, review or approval, if at all, compared to conventional
FDA  procedures.  The  FDA  may  withdraw  fast  track  designation  if  it  believes  that  the  designation  is  no  longer  supported  by  data  from  our  clinical
development program.

In addition, in the EU, the PRIME designation program focuses on product candidates that target conditions for which there exists no satisfactory method
of treatment in the EU or product candidates that may offer a major therapeutic advantage over existing treatments. The benefits of a PRIME designation
include, among other things, the potential to qualify product for accelerated review, meaning reduction in the review time for an opinion on approvability to
be  issued  earlier  in  the  application  process.  PRIME  designation  enables  an  applicant  to  request  parallel  EMA  scientific  advice  and  health  technology
assessment  advice  to  facilitate  timely  market  access.  Even  if  our  product  candidates  receive  PRIME  designation,  we  may  not  experience  a  faster
development process, review or approval compared to conventional EMA procedures and it does not assure or increase the likelihood of the EMA’s grant of
a marketing authorization.

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We, or any collaborators, may not be able to obtain orphan drug designation or orphan drug exclusivity for our drug candidates and, even if we do, that
exclusivity may not prevent the FDA or the EMA from approving competing drugs.

Regulatory  authorities  in  some  jurisdictions,  including  the  United  States  and  Europe,  may  designate  drugs  and  biologics  for  relatively  small  patient
populations as orphan drugs. Under the Orphan Drug Act, the FDA may designate a product as an orphan drug if it is a drug or biologic intended to treat a
rare disease or condition, which is generally defined as a patient population of fewer than 200,000 individuals annually in the United States.

Generally,  if  a  product  with  an  orphan  drug  designation  subsequently  receives  the  first  marketing  approval  for  the  indication  for  which  it  has  such
designation,  the  product  is  entitled  to  a  period  of  marketing  exclusivity,  which  precludes  the  EMA  or  the  FDA  from  approving  another  marketing
application for the same product for that time period. The applicable period is seven years in the United States and ten years in Europe. The European
exclusivity period can be reduced to six years if a product no longer meets the criteria for orphan drug designation or if the product is sufficiently profitable
so that market exclusivity is no longer justified. Orphan drug exclusivity may be lost if the FDA or EMA determines that the request for designation was
materially  defective  or  if  the  manufacturer  is  unable  to  assure  sufficient  quantity  of  the  product  to  meet  the  needs  of  patients  with  the  rare  disease  or
condition.  Moreover,  even  after  an  orphan  drug  is  approved,  the  FDA  can  subsequently  approve  a  different  product  for  the  same  condition  if  the  FDA
concludes that the later product is clinically superior in that it is shown to be safer, more effective or makes a major contribution to patient care.

Moreover, even after an orphan drug is approved, the FDA can subsequently approve a different product for the same condition if the FDA concludes that
the later product is clinically superior in that it is shown to be safer, more effective or makes a major contribution to patient care. The FDA may reevaluate
the Orphan Drug Act and its regulations and policies. We do not know if, when, or how the FDA may change the orphan drug regulations and policies in
the future, and it is uncertain how any changes might affect our business.

Any product or product candidate for which we or our collaborators obtain marketing approval could be subject to restrictions or withdrawal from the
market and we may be subject to substantial penalties if we fail to comply with regulatory requirements or if we experience unanticipated problems with
our medicines, when and if any of them are approved.

Any  product  or  product  candidate  for  which  we  or  our  collaborators  obtain  marketing  approval,  along  with  the  manufacturing  processes,  post-approval
clinical data, labeling, advertising and promotional activities for such medicine, will be subject to continual requirements of and review by the FDA and
other regulatory authorities. These requirements include submissions of safety and other post-marketing information and reports, registration and listing
requirements,  cGMP  requirements  relating  to  quality  control  and  manufacturing,  quality  assurance  and  corresponding  maintenance  of  records  and
documents, and requirements regarding the distribution of samples to physicians and record keeping. Even if marketing approval of a product candidate is
granted,  the  approval  may  be  subject  to  limitations  on  the  indicated  uses  for  which  the  medicine  may  be  marketed  or  to  the  conditions  of  approval,  or
contain  requirements  for  costly  post-marketing  testing  and  surveillance  to  monitor  the  safety  or  efficacy  of  the  medicine,  including  the  requirement  to
implement a risk evaluation and mitigation strategy.

The FDA and other agencies, including the Department of Justice, or the DOJ, closely regulate and monitor the post-approval marketing and promotion of
products to ensure that they are marketed and distributed only for the approved indications and in accordance with the provisions of the approved labeling.
The FDA and DOJ impose stringent restrictions on manufacturers’ communications regarding off-label use and if we market our medicines for uses other
than their respective approved indications, we may be subject to enforcement action for off-label marketing. Violations of the FDCA and other statutes,
including the False Claims Act, relating to the promotion and advertising of prescription drugs may lead to investigations and enforcement actions alleging
violations of federal and state health care fraud and abuse laws, as well as state consumer protection laws, which violations may result in the imposition of
significant administrative, civil and criminal penalties.

Our  relationships  with  healthcare  providers,  physicians  and  third-party  payors  are  subject  to  applicable  anti-kickback,  fraud  and  abuse  and  other
healthcare  laws  and  regulations,  which,  in  the  event  of  a  violation,  could  expose  us  to  criminal  sanctions,  civil  penalties,  contractual  damages,
reputational harm and diminished profits and future earnings.

Healthcare  providers,  physicians  and  third-party  payors  will  play  a  primary  role  in  the  recommendation  and  prescription  of  PYRUKYND®  and  any
product  candidates  for  which  we  obtain  marketing  approval.  Our  future  arrangements  with  healthcare  providers,  physicians  and  third-party  payors  may
expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may constrain the business or financial arrangements and
relationships through which we market, sell and distribute PYRUKYND® and any other medicines for which we obtain marketing approval. Restrictions
under applicable federal and state healthcare laws and regulations include the following:

•

the federal Anti-Kickback Statute prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving or providing
remuneration, 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  recommendation  or  arranging  of,  any  good  or  service,  for  which  payment  may  be  made  under  a  federal  healthcare  program  such  as
Medicare and Medicaid;

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•

•

the federal False Claims Act imposes criminal and civil penalties, including through civil whistleblower or qui tam actions, against individuals or
entities for, among other things, knowingly presenting, 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 obligation to pay
money to the federal government, with potential liability including mandatory treble damages and significant per-claim penalties;

the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, imposes criminal and civil liability for executing a scheme to
defraud any healthcare benefit program or making false statements relating to healthcare matters;

• HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act and its implementing regulations, also imposes
obligations, including mandatory contractual terms, with respect to safeguarding the privacy, security and transmission of individually identifiable
health information;

•

•

the federal Physician Payments Sunshine Act requires applicable manufacturers of covered drugs to report payments and other transfers of value
to physicians and teaching hospitals and other covered recipients; and

analogous state and foreign laws and regulations, such as state anti-kickback and false claims laws and transparency statutes, may apply to sales or
marketing arrangements and claims involving healthcare items or services reimbursed by non-governmental third-party payors, including private
insurers.

Some  state  laws  require  pharmaceutical  companies  to  comply  with  the  pharmaceutical  industry’s  voluntary  compliance  guidelines  and  the  relevant
compliance  guidance  promulgated  by  the  federal  government  and  may  require  drug  manufacturers  to  report  information  related  to  payments  and  other
transfers of value to physicians and other healthcare providers or marketing expenditures. State and foreign laws also govern the privacy and security of
health  information  in  some  circumstances,  many  of  which  differ  from  each  other  in  significant  ways  and  often  are  not  preempted  by  HIPAA,  thus
complicating compliance efforts.

Efforts  to  ensure  that  our  business  arrangements  with  third  parties  will  comply  with  applicable  healthcare  laws  and  regulations  will  involve  substantial
costs. It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or
case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or
any  other  governmental  regulations  that  may  apply  to  us,  we  may  be  subject  to  significant  civil,  criminal  and  administrative  penalties,  damages,  fines,
imprisonment, exclusion of products from government funded healthcare programs, such as Medicare and Medicaid, and the curtailment or restructuring of
our operations. If any of the physicians or other healthcare providers or entities with whom we expect to do business are found to be not in compliance with
applicable laws, they may be subject to criminal, civil or administrative sanctions, including exclusions from government funded healthcare programs.

The provision of benefits or advantages to physicians to induce or encourage the prescription, recommendation, endorsement, purchase, supply, order or
use of medicinal products is also prohibited in the EU. The provision of benefits or advantages to physicians is governed by the national anti-bribery laws
of EU Member States, such as the U.K. Bribery Act 2010. Infringement of these laws could result in substantial fines and imprisonment.

Payments made to physicians in certain EU Member States must be publicly disclosed. Moreover, agreements with physicians often must be the subject of
prior  notification  and  approval  by  the  physician’s  employer,  his  or  her  competent  professional  organization  and/or  the  regulatory  authorities  of  the
individual EU Member States. These requirements are provided in the national laws, industry codes or professional codes of conduct, applicable in the EU
Member  States.  Failure  to  comply  with  these  requirements  could  result  in  reputational  risk,  public  reprimands,  administrative  penalties,  fines  or
imprisonment.

PYRUKYND® or any product candidate that we commercialize, such products may become subject to unfavorable pricing regulations and third-party
reimbursement practices, which would harm our business.

The commercial success of PYRUKYND® or of any of our product candidates will depend substantially, both domestically and abroad, on the extent to
which  the  costs  of  our  product  candidates  will  be  paid  by  third-party  payors,  including  government  health  administration  authorities  and  private  health
coverage insurers. If coverage and reimbursement is not available, or reimbursement is available only to limited levels, we, or any collaborators, may not
be able to successfully commercialize PYRUKYND® or our product candidates. Even if coverage is provided, the approved reimbursement amount may
not  be  high  enough  to  allow  us,  or  any  future  collaborators,  to  establish  or  maintain  pricing  sufficient  to  realize  a  sufficient  return  on  our  or  their
investments.  In  the  United  States,  no  uniform  policy  of  coverage  and  reimbursement  for  products  exists  among  third-party  payors  and  coverage  and
reimbursement for products can differ significantly from payor to payor. As a result, the coverage determination process is often a time-consuming and
costly process that will require us to provide scientific and clinical support for the use of our products to each payor separately, with no assurance that
coverage and adequate reimbursement will be applied consistently or obtained in the first instance.

There  is  significant  uncertainty  related  to  third-party  payor  coverage  and  reimbursement  of  newly  approved  drugs.  Marketing  approvals,  pricing  and
reimbursement for new drug products vary widely from country to country. Some countries require

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approval of the sale price of a drug before it can be marketed. In many countries, the pricing review period begins after marketing or product licensing
approval  is  granted.  In  some  foreign  markets,  prescription  pharmaceutical  pricing  remains  subject  to  continuing  governmental  control  even  after  initial
approval  is  granted.  In  these  countries,  pricing  negotiations  with  governmental  authorities  can  take  considerable  time  after  the  receipt  of  marketing
approval for a product. To obtain reimbursement or pricing approval in some countries, we may be required to conduct a clinical trial that compares the
cost effectiveness of our product candidates to other available therapies. If reimbursement of our products is unavailable or limited in scope or amount, or if
pricing is set at unsatisfactory levels, our ability to generate revenues and become profitable could be impaired.

As a result, we, or any collaborators, might obtain marketing approval for a product in a particular country, but then be subject to price regulations that
delay commercial launch of the product, possibly for lengthy time periods, which may negatively impact the revenue we are able to generate from the sale
of the product in that country. Adverse pricing limitations may hinder our ability or the ability of any collaborators to recoup our or their investment in one
or more product candidates, even if our product candidates obtain marketing approval.

Patients who are provided medical treatment for their conditions generally rely on third-party payors to reimburse all or part of the costs associated with
their treatment. Therefore, our ability, and the ability of any collaborators, to commercialize PYRUKYND® or any of our product candidates will depend
in part on the extent to which coverage and reimbursement for these products and related treatments will be available from third-party payors. Third-party
payors decide which medications they will cover and establish reimbursement levels. The healthcare industry is acutely focused on cost containment, both
in  the  United  States  and  elsewhere.  Government  authorities  and  other  third-party  payors  have  attempted  to  control  costs  by  limiting  coverage  and  the
amount  of  reimbursement  for  particular  medications,  which  could  affect  our  ability  or  that  of  any  collaborators  to  sell  PYRUKYND®  or  our  product
candidates  profitably.  These  payors  may  not  view  our  products,  if  any,  as  cost-effective,  and  coverage  and  reimbursement  may  not  be  available  to  our
customers,  or  those  of  any  collaborators,  or  may  not  be  sufficient  to  allow  our  products,  if  any,  to  be  marketed  on  a  competitive  basis.  Cost-control
initiatives could cause us, or any collaborators, to decrease the price we, or they, might establish for products, which could result in lower than anticipated
product  revenue.  If  the  prices  for  our  products,  if  any,  decrease  or  if  governmental  and  other  third-party  payors  do  not  provide  coverage  or  adequate
reimbursement, our prospects for revenue and profitability will suffer.

In  addition,  increasingly,  third-party  payors  are  requiring  higher  levels  of  evidence  of  the  benefits  and  clinical  outcomes  of  new  technologies  and  are
challenging the prices charged. We cannot be sure that coverage will be available for PYRUKYND® or any product candidate that we, or any collaborator,
may commercialize and, if available, that the reimbursement rates will be adequate. Further, the net reimbursement for drug products may be subject to
additional reductions if there are changes to laws that presently restrict imports of drugs from countries where they may be sold at lower prices than in the
United States. An inability to promptly obtain coverage and adequate payment rates from both government-funded and private payors for PYRUKYND®
or  any  of  our  product  candidates  for  which  we,  or  any  collaborator,  may  obtain  marketing  approval  could  significantly  harm  our  operating  results,  our
ability to raise capital needed to commercialize products and our overall financial condition.

Current  and  future  healthcare  reform  legislation  may  increase  the  difficulty  and  cost  for  us  and  any  collaborators  to  obtain  reimbursement  and
commercialize our drug candidates.

In  the  United  States  and  foreign  jurisdictions,  there  have  been  a  number  of  legislative  and  regulatory  changes  and  proposed  changes  regarding  the
healthcare  system  that  could  prevent  or  delay  marketing  approval  of  our  product  candidates,  restrict  or  regulate  post-approval  activities  and  affect  our
ability,  or  the  ability  of  any  collaborators,  to  profitably  sell  PYRUKYND®  or  any  other  product  for  which  we,  or  they,  obtain  marketing  approval.  We
expect that current laws, as well as other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in
additional  downward  pressure  on  the  price  that  we,  or  any  collaborators,  may  receive  for  any  approved  products.  If  reimbursement  of  our  products  is
unavailable or limited in scope, our business could be materially harmed.

In  March  2010,  President  Obama  signed  into  law  the  Patient  Protection  and  Affordable  Care  Act,  as  amended  by  the  Health  Care  and  Education
Affordability  Reconciliation  Act,  or  collectively  the  ACA.  In  August  2011,  the  Budget  Control  Act  of  2011,  among  other  things,  created  measures  for
spending reductions by Congress. This legislation resulted in aggregate reductions to Medicare payments to providers of up to 2% per fiscal year, which
will remain in effect through 2031. However, pursuant to the CARES Act and subsequent legislation, these Medicare sequester reductions are suspended
through the end of March 2022 and from April 2022 through June 2022, a 1% cut will be in effect, with the full 2% cut resuming thereafter. The American
Taxpayer Relief Act of 2012, among other things, reduced Medicare payments to several providers and increased the statute of limitations period for the
government to recover overpayments to providers from three to five years. These laws may result in additional reductions in Medicare and other healthcare
funding and otherwise affect the prices we may obtain for any of our product candidates for which we may obtain regulatory approval or the frequency
with which any such product candidate is prescribed or used.

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Since enactment of the ACA, there have been, and continue to be, numerous legal challenges and Congressional actions to repeal and replace provisions of
the law. For example, in 2017, Congress repealed the “individual mandate.” The repeal of this provision, which requires most Americans to carry a minimal
level of health insurance, became effective in 2019. On November 10, 2020, the Supreme Court heard oral arguments as to whether the individual mandate
portion of the ACA is an essential and inseverable feature of the ACA, and therefore because the mandate was repealed as part of the Tax Cuts and Jobs
Act, the remaining provisions of the ACA are invalid as well. On February 10, 2021, the Biden Administration 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 plaintiffs did not have standing to
challenge the ACA’s minimum essential coverage provision at issue in the case.

The  Trump  Administration  also  took  executive  actions  to  undermine  or  delay  implementation  of  the  ACA,  including  directing  federal  agencies  with
authorities and responsibilities under the ACA to waive, defer, grant exemptions from, or delay the implementation of any provision of the ACA that would
impose a fiscal or regulatory burden on states, individuals, healthcare providers, health insurers, or manufacturers of pharmaceuticals or medical devices.
On January 28, 2021, however, President Biden revoked these Orders and issued a new Executive Order which directs federal agencies to reconsider rules
and other policies that limit Americans’ access to health care, and consider actions that will protect and strengthen that access. This Executive Order also
directs the U.S. Department of Health and Human Services to create a special enrollment period for the Health Insurance Marketplace in response to the
COVID-19 pandemic. We cannot predict how federal agencies will respond to such Executive Orders.

The costs of prescription pharmaceuticals in the United States and foreign jurisdictions are subject to considerable legislative and executive actions
and could impact the prices we obtain for our drug products, if and when approved.

The costs of prescription pharmaceuticals have also been the subject of considerable discussion in the United States.

To date, there have been several recent U.S. congressional inquiries, as well as proposed and enacted state and federal legislation designed to, among other
things,  bring  more  transparency  to  drug  pricing,  review  the  relationship  between  pricing  and  manufacturer  patient  programs,  reduce  the  costs  of  drugs
under  Medicare  and  reform  government  program  reimbursement  methodologies  for  products.  To  those  ends,  President  Trump  issued  several  executive
orders  intended  to  lower  the  costs  of  prescription  drug  products.  Certain  of  these  orders  are  reflected  in  recently  promulgated  regulations,  including  an
interim  final  rule  implementing  President  Trump’s  most  favored  nation  model,  which  would  tie  Medicare  Part  B  payments  for  certain  physician-
administered  drugs  to  the  lowest  price  paid  in  other  economically  advanced  countries  effective,  but  such  final  rule  is  currently  subject  to  a  nationwide
preliminary injunction. On August 21, 2021, the Centers for Medicare & Medicaid Services, or CMS, issued a proposed rule to rescind President Trump’s
interim final rule, following public notice and comment, and CMS stated it will explore all options to incorporate value into payments for Medicare Part B
drugs and improve beneficiaries’ access to evidence-based care. The Biden Administration has frozen certain of the Trump Administration’s measures to
reform drug prices. It remains to be seen whether the orders and resulting regulations put in place during the Trump Administration will remain in force.
Further,  on  September  24,  2020,  the  Trump  Administration  finalized  a  rulemaking  allowing  states  or  certain  other  non-federal  government  entities  to
submit importation program proposals to the FDA for review and approval. Applicants are required to demonstrate that their importation plans pose no
additional risk to public health and safety and will result in significant cost savings for consumers. The FDA has issued draft guidance that would allow
manufacturers to import their own FDA-approved drugs that are authorized for sale in other countries (multi-market approved products).

At the state level, individual states are increasingly aggressive in passing legislation and implementing regulations designed to control pharmaceutical and
biological  product  pricing,  including  price  or  patient  reimbursement  constraints,  discounts,  restrictions  on  certain  product  access  and  marketing  cost
disclosure  and  transparency  measures,  and,  in  some  cases,  designed  to  encourage  importation  from  other  countries  and  bulk  purchasing.  In  addition,
regional health care authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which
suppliers will be included in their prescription drug and other health care programs. These measures could reduce the ultimate demand for our products,
once approved, or put pressure on our product pricing. We expect that additional 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 or product candidates or additional pricing pressures.

In the European Union, similar political, economic and regulatory developments may affect our ability to profitably commercialize our product candidates,
if approved.

We are subject to U.S. and foreign export control, import, sanctions, anti-corruption and anti-money laundering laws with respect to our operations
and non-compliance with such laws can subject us to criminal and/or civil liability and harm our business.

We are subject to export control and import laws and regulations, including the U.S. Export Administration Regulations, U.S. Customs regulations, various
economic and trade sanctions regulations administered by the U.S. Treasury Department’s Office

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of Foreign Assets Control, the U.S. Foreign Corrupt Practices Act of 1977, as amended, the U.S. domestic bribery statute contained in 18 U.S.C. § 201, the
U.S.  Travel  Act,  the  USA  PATRIOT  Act,  and  other  state  and  national  anti-bribery  and  anti-money  laundering  laws  in  countries  in  which  we  conduct
activities.  Anti-corruption  laws  are  interpreted  broadly  and  prohibit  companies  and  their  employees,  agents,  third-party  intermediaries,  joint  venture
partners  and  collaborators  from  authorizing,  promising,  offering,  or  providing,  directly  or  indirectly,  improper  payments  or  benefits  to  recipients  in  the
public  or  private  sector.  We  may  have  direct  or  indirect  interactions  with  officials  and  employees  of  government  agencies  or  government-affiliated
hospitals,  universities,  and  other  organizations.  In  addition,  we  may  engage  third  party  intermediaries  to  promote  our  clinical  research  activities  abroad
and/or to obtain necessary permits, licenses, and other regulatory approvals. We can be held liable for the corrupt or other illegal activities of these third-
party intermediaries, our employees, representatives, contractors, partners, and agents, even if we do not explicitly authorize or have actual knowledge of
such activities.

Noncompliance with such laws could subject us to whistleblower complaints, investigations, sanctions, settlements, prosecution, other enforcement actions,
disgorgement of profits, significant fines, damages, other civil and criminal penalties or injunctions, suspension and/or debarment from contracting with
certain  persons,  the  loss  of  export  privileges,  reputational  harm,  adverse  media  coverage,  and  other  collateral  consequences.  If  any  subpoenas,
investigations, or other enforcement actions are launched, or governmental or other sanctions are imposed, or if we do not prevail in any possible civil or
criminal litigation, our business, results of operations and financial condition could be materially harmed. In addition, responding to any action will likely
result in a materially significant diversion of management’s attention and resources and significant defense and compliance costs and other professional
fees.  In  certain  cases,  enforcement  authorities  may  even  cause  us  to  appoint  an  independent  compliance  monitor  which  can  result  in  added  costs  and
administrative burdens.

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could
have a material adverse effect on the success of our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the handling, use,
storage,  treatment  and  disposal  of  hazardous  materials  and  wastes.  Our  operations  involve  the  use  of  hazardous  and  flammable  materials,  including
chemicals and biological and radioactive materials. Our operations also produce hazardous waste products. We generally contract with third parties for the
disposal of these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury
resulting from our use of hazardous materials, we could be held liable for any resulting damages, and any liability could exceed our resources. We also
could incur significant costs associated with civil or criminal fines and penalties.

Although we maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from
the  use  of  hazardous  materials,  this  insurance  may  not  provide  adequate  coverage  against  potential  liabilities.  We  do  not  maintain  insurance  for
environmental liability or toxic tort claims that may be asserted against us in connection with our storage or disposal of biological, hazardous or radioactive
materials.

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These current or
future laws and regulations may impair our research, development or production efforts. Failure to comply with these laws and regulations also may result
in substantial fines, penalties or other sanctions.

Risks Related to Employee Matters and Managing Growth

Our future success depends on our ability to retain our key executives and scientific leadership and to attract, retain and motivate qualified personnel.

We are highly dependent on the principal members of our management and scientific teams, each of whom is employed “at will,” meaning we or they may
terminate the employment relationship at any time. We do not maintain “key person” insurance for any of our executives or other employees. The loss of
the services of any of these persons could impede the achievement of our research, development and commercialization objectives. We cannot predict the
likelihood, timing or effect of future transitions among our executive leadership.

Recruiting and retaining qualified scientific, clinical, manufacturing, regulatory and sales and marketing personnel will also be critical to our success. We
may  not  be  able  to  attract  and  retain  these  personnel  on  acceptable  terms  given  the  competition  among  numerous  pharmaceutical  and  biotechnology
companies and universities and research institutions for similar personnel. Our consultants and advisors, including our scientific co-founders, who assist us
in formulating our research and development and commercialization strategy may be employed by employers other than us and may have commitments
under consulting or advisory contracts with other entities that may limit their availability to us. Furthermore, the ongoing COVID-19 pandemic and our
flexible workplace policy allowing employees to work from home may make it difficult for us to maintain our corporate culture.

We expect to continue to experience growth in the number of our employees as we expand our development, regulatory and future sales and marketing
capabilities. To manage our anticipated future growth, we must continue to implement and improve

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our managerial, operational and financial systems, expand our facilities and continue to recruit and train additional qualified personnel. Any inability to
manage growth could delay the execution of our business plans or disrupt our operations.

Our employees may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements, which
could have a material adverse effect on our business.

We  are  exposed  to  the  risk  of  employee  fraud  or  other  misconduct.  Misconduct  by  employees  could  include  intentional  failures  to  comply  with  FDA
regulations  or  regulations  in  other  jurisdictions,  provide  accurate  information  to  the  FDA  or  other  regulatory  authorities,  comply  with  manufacturing
standards  we  have  established,  comply  with  federal  and  state  healthcare  fraud  and  abuse  laws  and  regulations,  report  financial  information  or  data
accurately, disclose unauthorized activities to us, or comply with securities laws. Employee misconduct could also involve the improper use of information
obtained in the course of clinical trials or interactions with the FDA or other regulatory authorities, including for illegal insider trading activities, which
could  result  in  regulatory  sanctions  and  serious  harm  to  our  reputation.  We  have  adopted  a  Code  of  Business  Conduct  and  Ethics,  but  it  is  not  always
possible  to  identify  and  deter  employee  misconduct,  and  the  precautions  we  take  to  detect  and  prevent  this  activity  may  not  be  effective  in  controlling
unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in
compliance with such laws or regulations. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our
rights,  those  actions  could  have  a  significant  impact  on  our  business  and  results  of  operations,  including  the  imposition  of  significant  fines  or  other
sanctions.

We may engage in acquisitions that could disrupt our business, cause dilution to our stockholders or reduce our financial resources.

In the future, we may enter into transactions to acquire other businesses, products or technologies. Because we have not made any acquisitions to date, our
ability to do so successfully is unproven. If we do identify suitable candidates, we may not be able to make such acquisitions on favorable terms, or at all.
Any acquisitions we make may not strengthen our competitive position, and these transactions may be viewed negatively by customers or investors. We
may  decide  to  incur  debt  in  connection  with  an  acquisition  or  issue  our  common  stock  or  other  equity  securities  to  the  stockholders  of  the  acquired
company, which would reduce the percentage ownership of our existing stockholders. We could incur losses resulting from undiscovered liabilities of the
acquired business that are not covered by the indemnification we may obtain from the seller. In addition, we may not be able to successfully integrate the
acquired personnel, technologies and operations into our existing business in an effective, timely and non-disruptive manner. Acquisitions may also divert
management  attention  from  day-to-day  responsibilities,  increase  our  expenses  and  reduce  our  cash  available  for  operations  and  other  uses.  We  cannot
predict the number, timing or size of future acquisitions or the effect that any such transactions might have on our operating results.

Risks Related to Our Common Stock and Other Matters

Provisions in our corporate charter documents and under Delaware law could make an acquisition of us, which may be beneficial to our stockholders,
more difficult and may prevent attempts by our stockholders to replace or remove our current management.

Provisions in our corporate charter and our bylaws may discourage, delay or prevent a merger, acquisition or other change in control of us that stockholders
may consider favorable, including transactions in which you might otherwise receive a premium for your shares. 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 addition,
because our board of directors is responsible for appointing the members of our management team, these provisions may frustrate or prevent any attempts
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:

•

•

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•

•

•

establish a classified board of directors such that not all members of the board are elected at one time;

allow the authorized number of our directors to be changed only by resolution of our board of directors;

limit the manner in which stockholders can remove directors from the board;

establish  advance  notice  requirements  for  stockholder  proposals  that  can  be  acted  on  at  stockholder  meetings  and  nominations  to  our  board  of
directors;

require that stockholder actions must be effected at a duly called stockholder meeting and prohibit actions by our stockholders by written consent;

limit who may call stockholder meetings;

authorize our board of directors to issue preferred stock without stockholder approval, which could be used to institute a shareholder rights plan, or
so-called “poison pill,” that would work to dilute the stock ownership of a potential hostile acquirer, effectively preventing acquisitions that have
not been approved by our board of directors; and

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•

require  the  approval  of  the  holders  of  at  least  75%  of  the  votes  that  all  our  stockholders  would  be  entitled  to  cast  to  amend  or  repeal  certain
provisions of our charter or bylaws.

Moreover, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which
prohibits a person who owns in excess of 15% of our outstanding voting stock from merging or combining with us for a period of three years after the date
of  the  transaction  in  which  the  person  acquired  in  excess  of  15%  of  our  outstanding  voting  stock,  unless  the  merger  or  combination  is  approved  in  a
prescribed manner.

The price of our common stock is likely to be volatile, which could result in substantial losses for purchasers of our common stock.

The trading price of our common stock has been, and may continue to be, volatile and could be subject to wide fluctuations in response to various factors,
some of which are beyond our control. For example, since January 1, 2015 the price of our common stock on the Nasdaq Global Select Market has ranged
from $27.55 per share to $138.85 per share. The stock market in general and the market for biopharmaceutical companies in particular have experienced
extreme volatility that has often been unrelated to the operating performance of particular companies. While the full extent of the economic impact and the
duration of the COVID-19 pandemic may be difficult to assess or predict, it has already caused, and is likely to result in further, significant disruption of
global financial markets, which may reduce our ability to access capital either at all or on favorable terms.

The market price for our common stock may be influenced by many factors, including:

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•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

our success in launching and commercializing PYRUKYND®;

the impact of the sale of our oncology business to Servier on our business;

the impact of our repurchases of shares of common stock from our stockholders;

announcements by us or our competitors of significant acquisitions, strategic partnerships, joint ventures, collaborations or capital commitments;

the timing and results of clinical trials of product candidates, or our competitors’ product candidates;

regulatory actions with respect to our product or product candidates or our competitors’ products and product candidates;

commencement or termination of collaborations for our development programs;

failure or discontinuation of any of our development programs;

regulatory or legal developments in the United States and other countries;

developments or disputes concerning patent applications, issued patents or other proprietary rights;

the recruitment or departure of key personnel;

the level of expenses related to any of our products, product candidates or development programs;

the results of our efforts to develop additional product candidates and products;

actual or anticipated changes in estimates as to financial results or development timelines;

announcement or expectation of additional financing efforts;

sales of our common stock by us, our insiders or other stockholders, including shares issuable upon exercise of outstanding stock options and upon
vesting of stock units under our stock incentive plans;

variations in our financial results or results of companies that are perceived to be similar to us;

changes in estimates, evaluations or recommendations by securities analysts, that cover our stock or the failure by one or more securities analysts
to continue to cover our stock;

changes in the structure of healthcare payment systems;

the societal and economic impact of public health epidemics, such as the ongoing COVID-19 pandemic and any recession, depression or sustained
market event resulting from the pandemic;

• market conditions in the pharmaceutical and biotechnology sectors;

•

•

general economic, industry and market conditions; and

the other factors described in this “Risk Factors” section.

In the past, following periods of volatility in the market price of a company's securities, securities class-action litigation often has been instituted against
that company. Such litigation, if instituted against us, could cause us to incur substantial costs to defend such claims and divert managements' attention and
resources, which could seriously harm our business, financial condition, results of operations and prospects.

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We also cannot guarantee that an active trading market for our shares will be sustained. An inactive trading market for our common stock may impair our
ability to raise capital to continue to fund our operations by selling shares and may impair our ability to acquire other companies or technologies by using
our shares as consideration.

Our financial condition and operating results also may fluctuate from quarter to quarter and year to year due to a variety of factors, many of which are
beyond our control. Accordingly, you should not rely upon the results of any quarterly or annual periods as indications of future operating performance.

Our  executive  officers,  directors  and  principal  stockholders  maintain  the  ability  to  significantly  influence  all  matters  submitted  to  stockholders  for
approval.

As  of  December  31,  2021,  our  executive  officers,  directors  and  principal  stockholders,  in  the  aggregate,  beneficially  owned  shares  representing  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
matters submitted to our stockholders for approval, as well as our management and affairs. For example, these persons could significantly influence the
election of directors and approval of any merger, consolidation or sale of all or substantially all of our assets. This concentration of voting power could
delay or prevent an acquisition of our company on terms that other stockholders may desire.

Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.

Under Section 382 of the Code and corresponding provisions of state law, if a company undergoes an “ownership change,” generally defined as a greater
than  50%  change  (by  value)  in  its  equity  ownership  by  certain  stockholders  over  a  three-year  period,  the  company’s  ability  to  use  its  pre-change  net
operating loss carryforwards and other pre-change tax attributes (such as research tax credits) to offset its post-change taxable income may be limited. Our
prior equity offerings and other changes in our stock ownership, some of which are outside of our control, may have resulted or could in the future result in
an ownership change. We completed a review of our changes in ownership through December 31, 2021, and determined that we did not have a qualified
ownership change since our last review as of December 31, 2020. Future ownership changes under Section 382 may limit the amount of net operating loss
and tax credit carryforwards that we could potentially utilize to reduce future tax liabilities.

There is also a risk that due to regulatory changes, such as suspensions on the use of net operating losses, or other unforeseen reasons, our existing net
operating losses could expire or otherwise become unavailable to offset future income tax liabilities. The Tax Act, as amended by the CARES Act, includes
changes  to  U.S.  federal  tax  rates  and  the  rules  governing  net  operating  loss  carryforwards  that  may  significantly  impact  our  ability  to  utilize  our  net
operating  losses  to  offset  taxable  income  in  the  future.  In  addition,  state  net  operating  losses  generated  in  one  state  cannot  be  used  to  offset  income
generated in another state. For these reasons we may be unable to use a material portion of our net operating losses and other tax attributes.

Our effective tax rate may fluctuate, and we may incur obligations in tax jurisdictions in excess of accrued amounts.

We are subject to taxation in numerous U.S. states and territories. As a result, our effective tax rate is derived from a combination of applicable tax rates in
the various places that we operate. In preparing our financial statements, we estimate the amount of tax that will become payable in each of such places.
Nevertheless, our effective tax rate may be different from previous periods or our current expectations due to numerous factors, including as a result of
changes  in  the  mix  of  our  profitability  from  state  to  state,  the  results  of  examinations  and  audits  of  our  tax  filings,  our  inability  to  secure  or  sustain
acceptable  agreements  with  tax  authorities,  changes  in  accounting  for  income  taxes  and  changes  in  tax  laws.  Any  of  these  factors  may  result  in  tax
obligations in excess of amounts accrued in our financial statements.

We incur costs as a result of operating as a public company, and our management is required to devote substantial time to compliance initiatives and
corporate governance practices.

We have incurred and will continue to incur significant legal, accounting and other expenses as a public company. The Sarbanes-Oxley Act of 2002, the
Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of The Nasdaq Global Select Market and other applicable securities
rules  and  regulations  impose  various  requirements  on  public  companies,  including  establishment  and  maintenance  of  effective  disclosure  and  financial
controls and corporate governance practices. Stockholder activism, the current political environment and the current high level of government intervention
and  regulatory  reform  may  lead  to  substantial  new  regulations.  Our  management  and  other  personnel  devote,  and  will  need  to  continue  to  devote,  a
substantial  amount  of  time  to  these  compliance  initiatives.  Moreover,  these  rules  and  regulations  increase  our  legal  and  financial  compliance  costs  and
make some activities more time-consuming and costly.

There can be no assurance that we will repurchase shares of our common stock or that we will repurchase shares at favorable prices.

On  March  25,  2021,  we  announced  that  our  board  of  directors  authorized  the  Repurchase  Program  for  the  repurchase  of  up  to  $1.2  billion  of  our
outstanding  shares  of  common  stock.  On  March  31,  2021,  in  connection  with  the  Repurchase  Program,  we  entered  into  a  definitive  share  repurchase
agreement with BMS to repurchase 7.1 million shares of our common stock held by

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certain  subsidiaries  of  BMS  for  an  aggregate  purchase  price  of  $344.5  million,  or  $48.38  per  share.  This  repurchase  was  completed  on  April  5,  2021.
Further, on April 2, 2021, in connection with the Repurchase Program, we entered into a Rule 10b5-1 repurchase plan pursuant to which we repurchased
approximately 9.1 million shares of common stock for $458.0 million, or $50.35 per share, under the plan. In total, as of December 31, 2021, we have
repurchased 16.2 million shares of common stock for $802.5 million under the Repurchase Program. On October 5, 2021, we terminated our Rule 10b5-1
share repurchase program and on October 13, 2021 entered into a Rule 10b-18 repurchase plan that allows us to conduct open market repurchases over time
up to our remaining authorization.

The amount and timing of share repurchases are subject to capital availability, our cash balances and future capital requirements and our determination that
share repurchases are in the best interest of our stockholders and are in compliance with all respective laws and our applicable agreements. We have paused
our share repurchases and for the foreseeable future, we expect that our capital allocation will be prioritized towards opportunities to accelerate programs in
our development pipeline and/or pursue potential complementary business development opportunities. A reduction in repurchases under, or the completion
of,  our  Repurchase  Program  could  have  a  negative  effect  on  our  stock  price.  We  can  provide  no  assurance  that  we  will  repurchase  shares  at  favorable
prices, if at all.

Because  we  do  not  anticipate  paying  any  cash  dividends  on  our  capital  stock  in  the  foreseeable  future,  capital  appreciation,  if  any,  will  be  the  sole
source of gain for our stockholders.

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all of our future earnings, if any, to finance the growth
and development of our business. As a result, capital appreciation, if any, of our common stock will be the sole source of gain for our stockholders for the
foreseeable future.

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

We  currently  lease  approximately  146,000  square  feet  at  88  Sidney  Street,  43,000  square  feet  at  64  Sidney  Street,  and  13,000  square  feet  at  38  Sidney
Street, Cambridge, Massachusetts. All leases, as amended, expire on February 29, 2028. At the end of the initial lease period, we have the option to extend
the leases at all facilities for two consecutive five year periods at the fair market rent at the time of the extension. In August 2021, we entered into a long-
term  sublease  agreement  for  13,000  square  feet  of  the  office  space  at  38  Sidney  Street  Cambridge,  Massachusetts.  The  term  of  the  lease  runs  until
December 2024.

We believe our existing facilities are adequate for our current needs and that additional space will be available in the future on commercially reasonable
terms as needed.

Item 3. Legal Proceedings

As  of  December  31,  2021,  we  were  not  a  party  to  any  material  legal  or  arbitration  proceedings.  No  governmental  proceedings  are  pending  or,  to  our
knowledge, contemplated against us. We are not a party to any material proceedings in which any director, member of senior management or affiliate of
ours is either a party adverse to us or our subsidiaries or has a material interest adverse to us or our subsidiaries.

Item 4. Mine Safety Disclosures

Not applicable.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Market Information

Our common stock has been publicly traded on the Nasdaq Global Select Market under the symbol “AGIO” since July 24, 2013. Prior to that time, there
was no public market for our common stock.

Holders

As of February 18, 2022, there were approximately 9 holders of record of our common stock. This number does not include beneficial owners whose shares
are held by nominees in street name.

Dividends

We  have  not  declared  or  paid  any  cash  dividends  on  our  capital  stock  since  our  inception.  We  intend  to  retain  future  earnings,  if  any,  to  finance  the
operation and expansion of our business and do not anticipate paying any cash dividends to holders of common stock in the foreseeable future.

Securities Authorized for Issuance under Equity Compensation Plans

Information about our equity compensation plans is incorporated herein by reference to Item 12, Security Ownership of Certain Beneficial Owners and
Management and Related Stockholder Matters, of this Annual Report on Form 10-K.

Performance Graph

The following performance graph and related information shall not be deemed to be “soliciting material” or to be “filed” with the Securities and Exchange
Commission, or SEC, for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or the Exchange Act, or otherwise subject to the
liabilities under that Section, nor shall such information be incorporated by reference into any future filing under the Exchange Act or the Securities Act of
1933, as amended, or the Securities Act, except to the extent that we specifically incorporate it by reference into such filing.

The  following  graph  compares  the  performance  of  our  common  stock  to  the  NASDAQ  Composite  Index  and  the  NASDAQ  Biotechnology  Index  from
December  31,  2016  through  December  31,  2021.  The  comparison  assumes  $100  was  invested  after  the  market  closed  on  December  31,  2016  in  our
common stock and in each of the foregoing indices, and it assumes reinvestment of dividends, if any. The stock price performance included in this graph is
not necessarily indicative of future stock price performance.

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Recent Sales of Unregistered Securities

None.

Purchases of Equity Securities by the Issuer or Affiliated Purchasers

On March 25, 2021, we announced that our board of directors authorized a share repurchase program to purchase up to $1.2 billion of our outstanding
shares  of  common  stock,  or  the  Repurchase  Program.  Under  the  Repurchase  Program,  we  are  authorized  to  repurchase  shares  through  open  market
purchases, privately negotiated block sales and through Rule 10b5-1 repurchase plans. The Repurchase Program has no expiration date.

On  March  31,  2021,  in  connection  with  the  Repurchase  Program,  we  entered  into  a  definitive  share  repurchase  agreement  with  BMS  to  repurchase  7.1
million  shares  of  our  common  stock  held  by  certain  subsidiaries  of  BMS  for  an  aggregate  purchase  price  of  $344.5  million,  or  $48.38  per  share.  This
repurchase was completed on April 5, 2021. On April 2, 2021, in connection with the Repurchase Program, we entered into a Rule 10b5-1 repurchase plan
to repurchase up to $600 million of shares of our common stock of the $1.2 billion shares authorized. As of December 31, 2021, we have repurchased
approximately  9.1  million  shares  of  common  stock  for  $458.0  million,  or  $50.35  per  share,  under  the  Rule  10b5-1  repurchase  plan.  In  total,  as  of
December 31, 2021, we have repurchased 16.2 million shares of common stock for $802.5 million, or $49.49 per share, under the Repurchase Program.

On October 5, 2021, we terminated our Rule 10b5-1 share repurchase plan and on October 13, 2021 we entered into a Rule 10b-18 repurchase plan that
allows us to conduct open market repurchases over time up to our remaining authorization under the Repurchase Program. As of December 31, 2021, we
have not repurchased any shares under the Rule 10b-18 repurchase plan.

The amount and timing of share repurchases are subject to capital availability, our cash balances and future capital requirements and our determination that
share repurchases are in the best interest of our stockholders and are in compliance with all respective laws and our applicable agreements. We have paused
our share repurchases and for the foreseeable future, we expect that our capital allocation will be prioritized towards opportunities to accelerate programs in
our development pipeline and/or pursue potential complementary business development opportunities.

The table below summarizes the repurchases made under our Repurchase Program during the three months ended December 31, 2021:

Period
October 1, 2021 through October 31, 2021
November 1, 2021 through November 30, 2021
December 1, 2021 through December 31, 2021
Total

Issuer Purchases of Equity Securities

Total
Number
of Shares
Purchased(1)

Average
Price Paid
per Share

Total Number
of Shares
Purchased as
Part of Publicly
Announced Plans
or Programs (1)

Approximate
Dollar Value of
Shares that May
Yet Be Purchased
Under the Plans
or Programs
(in millions)

416,259  $
—  $
—  $

416,259  $

45.76 
— 
— 

45.76 

416,259  $
—  $
—  $

416,259 

397.5 
— 
— 

(1) All shares repurchased by us during the three months ended December 31, 2021, were repurchased pursuant to the Repurchase Program, as described
above.

Item 6. Reserved.

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

You  should  read  the  following  discussion  and  analysis  of  our  financial  condition  and  results  of  operations  together  with  our  consolidated  financial
statements  and  the  related  notes  and  other  financial  information  included  elsewhere  in  this  Annual  Report  on  Form  10-K.  Some  of  the  information
contained in this discussion and analysis or set forth elsewhere in this Annual Report on Form 10-K, including information with respect to our plans and
strategy  for  our  business,  includes  forward-looking  statements  that  involve  risks  and  uncertainties.  You  should  review  "Item  1A,  Risk  Factors"  of  this
Annual  Report  on  Form  10-K  for  a  discussion  of  important  factors  that  could  cause  actual  results  to  differ  materially  from  the  results  described  in  or
implied by the forward-looking statements contained in the following discussion and analysis.

Overview

We  are  a  biopharmaceutical  company  committed  to  transforming  patients’  lives  through  scientific  leadership  in  the  field  of  cellular  metabolism  and
adjacent areas of biology, with the goal of creating differentiated, small molecule medicines for genetically defined diseases. We take a systems biology
approach to deeply understand disease states, drive the discovery and validation of novel therapeutic targets, and define patient selection strategies, thereby
increasing the probability that our experimental medicines will have the desired therapeutic effect, while cultivating connections with patient communities,
healthcare professionals, partners and colleagues to discover, develop and deliver potential therapies for genetically defined diseases, or GDDs.

The  lead  product  in  our  genetically  defined  disease,  or  GDD,  portfolio,  PYRUKYND®  (mitapivat),  is  an  activator  of  both  wild-type  and  a  variety  of
mutant pyruvate kinase, or PK, enzymes, for the potential treatment of hemolytic anemias. In February 2022, the FDA approved PYRUKYND® for the
treatment of hemolytic anemia in adults with pyruvate kinase (PK) deficiency in the United States and we expect to commercially launch PYRUKYND®
in the first quarter of 2022. In June 2021, we submitted a marketing authorization application, or MAA, to the EMA for PYRUKYND® for the treatment of
adults  with  PK  deficiency  in  the  European  Union.  The  MAA  has  passed  validation,  and  the  regulatory  review  process  is  ongoing.  In  addition,  we  are
currently evaluating PYRUKYND® for the treatment of α- and β-thalassemia and sickle cell disease, or SCD, in the ongoing clinical trials described below
and we intend to evaluate PYRUKYND® in pediatric patients with PK deficiency in the planned clinical trials described below. We are also developing
AG-946,  a  novel,  next-generation  PK  activator,  for  the  potential  treatment  of  hemolytic  anemias  and  other  indications,  including  SCD  and  anemia
associated with low- to intermediate-risk myelodysplastic syndrome, or L-IR MDS.

In addition to the aforementioned development programs, we foster a productive research engine and are seeking to advance multiple novel, investigational
therapies  in  clinical  and  preclinical  development  in  our  focus  area  of  GDDs,  based  on  our  scientific  leadership  in  the  field  of  cellular  metabolism  and
adjacent areas of biology.

Sale of Oncology Business to Servier Pharmaceuticals, LLC (Servier)

On March 31, 2021, we completed the sale of our oncology business to Servier Pharmaceuticals LLC, or Servier. The transaction included the sale of our
oncology business, including TIBSOVO®, our clinical-stage product candidates vorasidenib, AG-270 and AG-636, and our oncology research programs
for a payment of approximately $1.8 billion in cash at the closing, subject to certain adjustments, and a payment of $200 million in cash, if, prior to January
1, 2027, vorasidenib is granted new drug application, or NDA, approval from the U.S. Food and Drug Administration, or FDA, with an approved label that
permits vorasidenib’s use as a single agent for the adjuvant treatment of patients with Grade 2 glioma that have an isocitrate dehydrogenase 1 or 2 mutation
(and, to the extent required by such approval, the vorasidenib companion diagnostic test is granted an FDA premarket approval), as well as a royalty of 5%
of U.S. net sales of TIBSOVO® from the close of the transaction through loss of exclusivity, and a royalty of 15% of U.S. net sales of vorasidenib from the
first  commercial  sale  of  vorasidenib  through  loss  of  exclusivity.  Servier  also  acquired  our  co-commercialization  rights  for  Bristol  Myers  Squibb’s
IDHIFA®  and  the  right  to  receive  a  $25.0  million  potential  milestone  payment  under  our  prior  collaboration  agreement  with  Celgene  Corporation,  or
Celgene, and following the sale Servier is responsible for conducting certain clinical development activities within the IDHIFA® development program.

The oncology business met the criteria within Accounting Standards Codification 205-20 to be reported as discontinued operations because the transaction
was a strategic shift in business that had a major effect on our operations and financial results. Therefore, we have reported the historical results of the
oncology  business  including  the  results  of  operations  and  cash  flows  as  discontinued  operations,  and  related  assets  and  liabilities  were  retrospectively
reclassified as assets and liabilities of discontinued operations for all periods presented herein. Unless otherwise noted, applicable amounts in the prior year
have been recast to conform to this discontinued operations presentation. Refer to Note 3 of our consolidated financial statements included in this Annual
Report on Form 10-K for additional information. A more complete description of our business prior to the consummation of the transaction is included in
Item 1. “Business”, in Part I of the Annual Report on Form 10-K for the year

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ended December 31, 2020 that was previously filed with the Securities and Exchange Commission, or SEC, on February 25, 2021.

Financial Operations Overview

Impact of COVID-19 on our Business

As of December 31, 2021, we have not experienced a significant financial or supply chain impact directly related to the COVID-19 pandemic but have
experienced some disruptions to clinical operations, including timelines to complete patient enrollment in some of our clinical trials, as further described
below. We are continuing to serve third parties while taking precautions to provide a safe work environment for our employees and third parties. Our lab-
based employees who need to be onsite to fulfill their job responsibilities have been onsite since late May 2020, and we have opened our Cambridge office
to employees who prefer to work onsite. Our field-based employees engage with healthcare providers and other third parties remotely and, where local
regulations allow, on a limited in-person basis. We are conducting our return to work program under strict guidelines as required by federal, state, and local
authorities. Effective November 8, 2021, we will require all employees, regardless of role or work location, to be fully vaccinated against COVID-19, as
defined by the Center of Disease Control and Prevention's guidelines, subject to limited exceptions. We have been monitoring our supply chain network for
disruptions due to the COVID-19 pandemic, and our third-party manufacturers remain largely unaffected, with any campaign delays experienced to date
being limited to a few days in duration. Although global shipping continues to be disrupted due to the pandemic, we have not experienced a supply impact.

The  extent  of  the  pandemic’s  effect  on  our  operational  and  financial  performance  will  depend  in  large  part  on  future  developments,  which  cannot  be
predicted with confidence at this time. Future developments include changes in the duration, scope and severity of the pandemic, including any variant
strains  of  the  COVID-19  virus,  the  actions  taken  to  contain  or  mitigate  its  impact,  the  impact  on  governmental  programs  and  budgets,  the  supply,
distribution and efficacy of vaccines, and the resumption of widespread economic activity. Any prolonged material disruption of our employees, suppliers,
manufacturing, or third parties could negatively impact our consolidated financial position, consolidated results of operations and consolidated cash flows.
As  a  result,  we  may  have  to  take  further  actions  that  we  determine  are  in  the  best  interests  of  our  employees  or  as  required  by  federal,  state,  or  local
authorities.

General

Since  inception,  our  operations  have  primarily  focused  on  organizing  and  staffing  our  company,  business  planning,  raising  capital,  assembling  our  core
capabilities  in  cellular  metabolism,  identifying  potential  product  candidates,  undertaking  preclinical  studies,  conducting  clinical  trials,  establishing  a
commercial infrastructure, preparing for the commercial launch of PYRUKYND® and, prior to the sale of our oncology business to Servier on March 31,
2021, marketing TIBSOVO® and IDHIFA®. Through March 31, 2021, we have financed our operations primarily through proceeds from the sale of our
royalty rights, commercial sales of TIBSOVO®, funding received from our collaboration agreements, private placements of our preferred stock, our initial
public offering of our common stock and concurrent private placement of common stock to an affiliate of Celgene, and our follow-on public offerings.
Following the sale of our oncology business to Servier on March 31, 2021, we expect to finance our operations primarily through cash on hand, royalty
payments from Servier with respect to U.S. net sales of TIBSOVO®, the potential milestone payment from Servier if vorasidenib is approved by the FDA,
and potential sales of PYRUKYND® if successfully launched by us and, potentially, collaborations, strategic alliances, licensing arrangements and other
nondilutive strategic transactions.

Additionally, since inception, we have incurred significant operating losses. Our net income for the year ended December 31, 2021 was $1,604.7 million
and our net losses for the years ended December 31, 2020 and 2019 were $327.4 million and $411.5 million, respectively. As of December 31, 2021, we
had an accumulated deficit of $238.8 million. The net income we generated in the year ended December 31, 2021 was primarily due to the sale of our
oncology business to Servier, which was consummated on March 31, 2021. Following the consummation of the sale of our oncology business, we expect to
incur significant expenses and net losses until such time we are able to report profitable results. Our net losses may fluctuate significantly from year to year.
We expect that we will continue to incur significant expenses as we continue to advance and expand clinical development activities for our lead programs:
PYRUKYND®, and AG-946; continue to discover and validate novel targets and drug product candidates; expand and protect our intellectual property
portfolio; and hire additional commercial, development and scientific personnel.

Research and development expenses

Research and development activities are central to our business model. Product candidates in later stages of clinical development generally have higher
development costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later-stage clinical trials. We
expect  research  and  development  costs  related  to  our  GDD  portfolio  to  increase  significantly  for  the  foreseeable  future  as  our  product  candidate
development  programs  progress.  However,  the  successful  development  of  our  product  candidates  is  highly  uncertain.  As  such,  at  this  time,  we  cannot
reasonably estimate or

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know the nature, timing and estimated costs of the efforts that will be necessary to complete the remainder of the development and to commercialize these
product candidates. While PYRUKYND® was only recently approved by the FDA, we are unable to predict when future net cash inflows will commence
from PYRUKYND® or any of our product candidates. This is due to the numerous risks and uncertainties associated with developing medicines, including
the uncertainty of:

•

•

•

•

•

•

•

establishing an appropriate safety profile with an investigational new drug application, or IND, and/or NDA-enabling toxicology and clinical trials;

the successful enrollment in, and completion of, clinical trials;

the receipt of marketing approvals from applicable regulatory authorities;

establishing compliant commercial manufacturing capabilities or making arrangements with third-party manufacturers;

obtaining and maintaining patent and trade secret protection and regulatory exclusivity for our product candidates;

launching commercial sales of the products, if and when approved, whether alone or in collaboration with others; and

maintaining an acceptable safety profile of the products following approval.

A change in the outcome of any of these variables with respect to the development of any of our product candidates would significantly change the costs
and timing associated with the development of that product candidate.

Research  and  development  expenses  consist  primarily  of  costs  incurred  for  our  research  activities,  including  our  drug  discovery  efforts,  and  the
development of our product candidates, which include:

•

•

•

•

employee-related expenses, including salaries, benefits and stock-based compensation expense;

expenses incurred under agreements with third parties, including contract research organizations, or CROs, that conduct research and development
and both preclinical and clinical activities on our behalf, and the cost of consultants;

the cost of lab supplies and acquiring, developing and manufacturing preclinical and clinical study materials; and

facilities,  depreciation,  and  other  expenses,  which  include  direct  and  allocated  expenses  for  rent  and  the  maintenance  of  facilities,  insurance  and
other operating costs.

The following summarizes our most advanced programs:

PYRUKYND® (mitapivat): First-in-Class PK Activator

We are developing PYRUKYND® for the treatment of PK deficiency and other hemolytic anemias such as thalassemia and SCD. PYRUKYND® is an
orally available small molecule and a potent activator of the wild-type and mutated PKR enzymes. To date, we have demonstrated in clinical trials that
treatment  with  PYRUKYND®  can  lead  to  durable  sustained  increases  in  hemoglobin  in  patients  with  amenable  mutations  in  the  PKR  gene  and  a
statistically significant and clinically meaningful reduction in transfusion burden in regularly transfused patients with PK deficiency, and we have observed
in clinical trials of PYRUKYND® durable improvements in hemoglobin concentration and markers of hemolysis and ineffective erythropoeiesis in both α-
and β- halassemia patients and reductions in 2,3-DPG and increases in ATP in SCD patients.

In February 2022, the FDA approved PYRUKYND® for the treatment of hemolytic anemia in adults with pyruvate kinase (PK) deficiency in the United
States.  In  June  2021,  we  submitted  a  marketing  authorization  application,  or  MAA,  to  the  EMA  for  the  treatment  of  adults  with  PK  deficiency  the
European Union. The MAA has passed validation, and the regulatory review process is ongoing. We have worldwide development and commercial rights
to PYRUKYND® and expect to fund the future development and commercialization costs related to this program. PYRUKYND® has been granted orphan
drug designation for the treatment of PK deficiency by the FDA and the EMA. Additionally, PYRUKYND® has received orphan drug designation from the
FDA  for  the  treatment  of  thalassemia  and  sickle  cell  disease.  We  have  built  our  US  commercial  infrastructure  to  support  the  commercial  launch  of
PYRUKYND in the US and continue to evaluate all options for the commercialization and continued development of PYRUKYND® outside of the United
States in order to maximize the benefit to patients and value to our shareholders, including through exploring potential partnership opportunities.

We are evaluating PYRUKYND® in the following clinical trials:

•

ENERGIZE, a phase 3, double-blind, randomized, placebo-controlled multicenter study evaluating the efficacy and safety of PYRUKYND® as a
potential  treatment  for  adults  with  non-transfusion-dependent  α-  or  β-thalassemia,  defined  as  ≤5  RBC  units  during  the  24-week  period  before
randomization and no RBC transfusions ≤8 weeks before providing informed consent or during the screening period. The primary endpoint of the
trial  is  percentage  of  patients  with  hemoglobin  response,  defined  as  a  ≥1.0  g/dL  increase  in  average  hemoglobin  concentration  from  Week  12
through  Week  24  compared  with  baseline.  Secondary  endpoints  include  markers  of  hemolysis  and  ineffective  erythropoiesis,  as  well  as  patient-
reported outcome measures. This trial is enrolling patients, and we expect to enroll a meaningful portion of the patients by the end of 2022.

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•

•

•

•

•

•

•

ENERGIZE-T, a phase 3, double-blind, randomized, placebo-controlled multicenter study evaluating the efficacy and safety of PYRUKYND® as a
potential treatment for adults with transfusion-dependent α- or β-thalassemia, defined as 6 to 20 RBC units transfused and ≤6-week transfusion-free
period  during  the  24-week  period  before  randomization.  The  primary  endpoint  of  the  trial  is  percentage  of  patients  with  transfusion  reduction
response, defined as a ≥50% reduction in transfused RBC units with a reduction of ≥2 units of transfused RBCs in any consecutive 12-week period
through  Week  48  compared  with  baseline.  Secondary  endpoints  include  additional  transfusion  reduction  measures  and  percentage  of  participants
with transfusion-independence. This trial is enrolling patients, and we expect to enroll a meaningful portion of the patients by the end of 2022.

RISE UP, a phase 2/3 study evaluating the efficacy and safety of PYRUKYND® in SCD patients who are 16 years of age or older, have had between
two and 10 sickle cell pain crises in the past 12 months, and have hemoglobin within the range of 5.5 to 10.5 g/dL during screening. The phase 2
portion  of  the  trial,  which  has  initiated,  includes  a  12-week  randomized,  placebo-controlled  period  in  which  participants  will  be  randomized  in  a
1:1:1  ratio  to  receive  50  mg  PYRUKYND®  twice  daily,  100  mg  PYRUKYND®  twice  daily  or  matched  placebo.  The  primary  endpoints  are
hemoglobin response, defined as ≥1 g/dL increase in average hemoglobin concentration from Week 10 through Week 12 compared to baseline, and
safety. These data will be used to establish a clear dosing paradigm for the phase 3 portion. The phase 3 portion includes a 52-week randomized,
placebo-controlled period in which participants will be randomized in a 2:1 ratio to receive the recommended PYRUKYND® dose level or placebo.
The primary endpoints are hemoglobin response, defined as ≥1 g/dL increase in average hemoglobin from baseline to Week 52, and annualized rate
of sickle cell pain crises. Participants who complete either the phase 2 or phase 3 portion will have the option to move into a 216-week open-label
extension period to continue to receive PYRUKYND®. The phase 2 portion of this trial is enrolling patients, and we expect to complete enrollment
in the phase 2 portion of the trial by the end of 2022.

An  extension  study  evaluating  the  long-term  safety,  tolerability  and  efficacy  of  treatment  with  PYRUKYND®  in  patients  from  ACTIVATE  and
ACTIVATE-T, our completed pivotal trials of PYRUKYND® in not regularly transfused and regularly transfused patients with PK deficiency.

An  extension  study  evaluating  the  long-term  safety,  tolerability  and  efficacy  of  treatment  with  PYRUKYND®  in  patients  from  DRIVE  PK,  our
completed global phase 2, first-in-patient, open-label safety and efficacy clinical trial of PYRUKYND® in adult, not regularly transfused patients
with PK deficiency.

An extension study evaluating the safety, tolerability and efficacy of treatment with PYRUKYND® in patients from our completed phase 2, open-
label safety and efficacy clinical trial of PYRUKYND® in adults with not-transfusion-dependent α- and β-thalassemia.

In collaboration with the National Institutes of Health, or NIH, we are evaluating PYRUKYND® in a phase 1 trial in patients with SCD pursuant to
a cooperative research and development agreement. The core trial period has completed. The long-term extension study is ongoing. In June 2020,
clinical proof of concept was established based on a preliminary analysis of the data from this trial.

In collaboration with UMC Utrecht, or UMC, we are evaluating PYRUKYND® in patients with SCD pursuant to an investigator sponsored trial
agreement. The trial is ongoing and enrolling patients, although UMC experienced disruptions related to the COVID-19 pandemic.

We expect to initiate two phase 3 trials of PYRUKYND®, ACTIVATE-kids and ACTIVATE-kidsT, in not regularly transfused and regularly transfused
pediatric patients with PK deficiency in mid-2022.

AG-946: Novel, Next-generation PKR Activator

We  are  developing  AG-946,  a  novel,  next-generation  PKR  activator,  for  the  potential  treatment  of  hemolytic  anemias.  We  are  evaluating  AG-946,  in  a
phase 1 trial of AG-946 in healthy volunteers and in patients with SCD. The trial is currently enrolling healthy volunteers, and we expect to initiate the
SCD patient cohort of this trial in the first half of 2022. We expect to initiate a phase 2a study of AG-946 in adults with L-IR MDS by year-end 2022.

Other research and platform programs

Other research and platform programs include activities related to exploratory efforts, target validation and lead optimization for our discovery and follow-
on programs, and our proprietary metabolomics platform.

Selling, general and administrative expenses

Selling,  general  and  administrative  expenses  consist  primarily  of  salaries  and  other  related  costs,  including  stock-based  compensation,  for  personnel  in
executive,  finance,  business  development,  commercial,  legal  and  human  resources  functions.  Other  significant  costs  include  facility-related  costs  not
otherwise  included  in  research  and  development  expenses,  legal  fees  relating  to  patent  and  corporate  matters,  and  fees  for  accounting  and  consulting
services.

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We anticipate that our selling, general and administrative expenses will increase in the future to support continued research and development activities and
ongoing  and  future  commercialization  activities  related  to  our  GDD  portfolio,  including  the  commercialization  of  PYRUKYND®  and  any  of  our  other
product candidates. These increases will likely include increased costs related to the hiring of additional personnel and fees to outside consultants, lawyers
and accountants, among other expenses.

Critical Accounting Policies and Significant Judgments and Estimates

Our management’s discussion and analysis of our financial condition and results of operations are based on our consolidated financial statements, which we
have prepared in accordance with accounting principles generally accepted in the United States. The preparation of these consolidated financial statements
requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities
at  the  date  of  the  financial  statements,  as  well  as  the  reported  amounts  of  revenue  and  expenses  during  the  reporting  periods.  On  an  ongoing  basis,  we
evaluate our estimates and judgments. We base our estimates on historical experience and on various other factors that we believe are reasonable under the
circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from
other sources. Actual results may differ from these estimates under different assumptions or conditions.

While our significant accounting policies are described in more detail in the notes to our consolidated financial statements included in this Annual Report
on Form 10-K, we believe that the following accounting policies are the most critical in fully understanding and evaluating our financial condition and
results of operations and are policies that require a significant level of judgment and estimates.

Accrued research and development expenses

As  part  of  the  process  of  preparing  our  consolidated  financial  statements,  we  are  required  to  estimate  our  accrued  expenses.  This  process  involves
reviewing  quotations  and  contracts,  identifying  services  that  have  been  performed  on  our  behalf  and  estimating  the  level  of  service  performed  and  the
associated cost incurred for the service when we have not yet been invoiced or otherwise notified of the actual cost. Certain service providers invoice us in
arrears for services performed or when contractual milestones are met. We make estimates of our accrued expenses as of each balance sheet date in our
financial statements based on facts and circumstances known to us at that time. We periodically confirm the accuracy of our estimates with the service
providers and make adjustments if necessary. Examples of estimated accrued research and development expenses include fees paid to: (i) CROs and other
third parties in connection with clinical studies and preclinical development activities; (ii) investigative sites in connection with clinical studies; and (iii)
third parties related to product manufacturing, development and distribution of clinical supplies.

We base our expenses related to CROs on our estimates of the services received and efforts expended pursuant to quotes and contracts with CROs that
conduct research and development on our behalf. The financial terms of these agreements are subject to negotiation, vary from contract to contract and may
result in uneven payment flows. There may be instances in which payments made to our vendors will exceed the level of services provided and result in a
prepayment of the research and development expense. In accruing service fees, we estimate the time period over which services will be performed and the
level of effort to be expended in each period. If the actual timing of the performance of services or the level of effort varies from our estimate, we adjust the
accrual or prepaid accordingly. Although we do not expect our estimates to be materially different from amounts actually incurred, our understanding of the
status and timing of services performed relative to the actual status and timing of services performed may vary and could result in us reporting amounts that
are too high or too low in any particular period.

Stock-based compensation

We account for stock-based compensation awards in accordance with ASC 718, Compensation –Stock Compensation. For stock-based awards granted to
employees, non-employees and members of the board of directors for their services and for participation in our employee stock purchase plan, we estimate
the grant date fair value of each option award using the Black-Scholes option-pricing model. The use of the Black-Scholes option-pricing model requires us
to make assumptions with respect to the expected term of the option, the expected volatility of the common stock consistent with the expected life of the
option, risk-free interest rates and expected dividend yields of the common stock.

Expected term. We  use  the  “simplified  method”  as  prescribed  by  the  Securities  and  Exchange  Commission  Staff  Accounting  Bulletin  No.  107,
Share Based Payments, to estimate the expected term of stock option grants. Under this approach, the weighted-average expected life is presumed
to  be  the  average  of  the  contractual  term  of  ten  years  and  the  weighted-average  vesting  term  of  the  stock  options,  taking  into  consideration
multiple vesting tranches. We utilize this method due to lack of historical data and the plain-vanilla nature of our share-based awards.

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Volatility. The  expected  volatility  has  been  determined  using  Agios'  historical  volatilities  for  a  period  equal  to  the  expected  term  of  the  option
grant.

Risk-free rate. The risk-free rate is based on the yield curve of U.S. Treasury securities with periods commensurate with the expected term of the
options being valued.

Dividends.  We  have  never  paid,  and  do  not  anticipate  paying,  any  cash  dividends  in  the  foreseeable  future,  and,  therefore,  use  an  expected
dividend yield of zero in the option-pricing model.

Forfeitures. We account for forfeitures as they occur and, therefore, do not estimate forfeitures.

For awards subject to service-based vesting conditions, we recognize stock-based compensation expense equal to the grant date fair value of stock options
on a straight-line basis over the requisite service period. For awards subject to both performance and service-based vesting conditions, we recognize stock-
based compensation expense over the remaining service period if the performance condition is considered probable of achievement using management’s
best estimates.

Discontinued Operations

We  accounted  for  the  sale  of  our  oncology  business  in  accordance  with  Accounting  Standards  Codification,  ASC,  205  Discontinued  Operations  and
Accounting Standards Update, ASU, No. 2014-08, Reporting of Discontinued Operations and Disclosures of Disposals of Components of an Entity. We
followed the held-for-sale criteria as defined in ASC 360 and ASC 205. ASC 205 requires that a component of an entity that has been disposed of or is
classified as held for sale and has operations and cash flows that can be clearly distinguished from the rest of the entity be reported as assets held for sale
and discontinued operations. In the period a component of an entity has been disposed of or classified as held for sale, the results of operations for the
periods  presented  are  reclassified  into  separate  line  items  in  the  consolidated  statements  of  operations.  Assets  and  liabilities  are  also  reclassified  into
separate line items on the related consolidated balance sheets for the periods presented. The statements of cash flows for the periods presented are also
reclassified to reflect the results of discontinued operations as separate line items. ASU 2014-08 requires that only a disposal of a component of an entity,
or a group of components of an entity, that represents a strategic shift that has, or will have, a major effect on the reporting entity’s operations and financial
results be reported in the financial statements as discontinued operations. ASU 2014-08 also provides guidance on the financial statement presentations and
disclosures of discontinued operations.

Due  to  the  sale  of  our  oncology  business  during  the  first  quarter  of  2021,  in  accordance  with  ASC  205,  we  have  classified  the  results  of  the  oncology
business  as  discontinued  operations  in  our  consolidated  statements  of  operations  and  cash  flows  for  all  periods  presented,  see  Note  3,  Discontinued
Operations. All assets and liabilities associated with our oncology business were therefore classified as assets and liabilities of discontinued operations in
our consolidated balance sheets for the periods presented. All amounts included in the notes to the consolidated financial statements relate to continuing
operations unless otherwise noted.

Results of Operations

Certain prior-year amounts have been reclassified to conform with current presentation.

Comparison of years ended December 31, 2021, 2020 and 2019

Total Operating Expenses

(In thousands)
Cost and expenses:

Research and development
Selling, general and administrative

Total Operating Expenses

2021

2020

2019

$

$

256,973  $
121,445 
378,418  $

220,811  $
115,105 
335,916  $

214,262 
102,007 
316,269 

Total Operating Expenses – 2021 vs 2020 – The increase in total operating expenses of $42.5 million in 2021 compared to 2020 was primarily due to an
increase of $36.2 million in research and development expenses, which is described below under Research and Development Expenses, and an increase of
$6.3 million in selling, general and administrative expense due to higher personnel costs related to additional hiring for our sales workforce and commercial
launch  preparation  activities  in  anticipation  of  the  FDA  approval  of  PYRUKYND®.  Included  in  selling,  general  and  administrative  expenses  is
approximately $4.4 million of reimbursable transition related services we provided to Servier related to the sale of the oncology business.

Total Operating Expenses – 2020 vs 2019 – The increase in total operating expenses of $19.6 million in 2020 compared to 2019 was primarily due to an
increase of $13.1 million in selling, general and administrative expense due to higher personnel costs, including stock-based compensation expense, related
to additional hiring for our workforce. Included in selling, general and administrative expense is approximately $5.0 million in professional fees related to
entering into the sale transaction with

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Servier. The increase of $6.5 million in research and development expenses is described below under Research and Development Expenses.

Research and Development Expenses

Our research and development expenses, by major program, are outlined in the table below:

(In thousands)
PK activator (PYRUKYND®)
Novel PK activator (AG-946)
Other research and platform programs

Total direct research and development expenses

Compensation and related expenses
Facilities and IT related expenses & other
Other expenses - transition services

Total indirect research and development expenses

Total research and development expense

2021

2020

2019

73,999  $
10,658 
22,959 
107,616 
95,198 
44,767 
9,392 
149,357 
256,973  $

48,669  $
8,378 
13,790 
70,837 
99,923 
50,051 
— 
149,974 
220,811  $

47,481 
5,849 
13,615 
66,945 
98,700 
48,617 
— 
147,317 
214,262 

$

$

Total Research and Development Expenses – 2021 vs 2020 – The increase in research and development expenses of $36.2 million in 2021 compared to
2020 was primarily due to a $36.8 million increase in our direct expenses. The increase in direct expenses was primarily due to a $25.3 million increase in
PYRUKYND®  costs  and  a  $9.2  million  increase  in  other  research  and  platform  programs.  The  increase  in  PYRUKYND®  costs  was  primarily  due  to
startup costs for the initiated phase 3 trials of PYRUKYND®, ENERGIZE and ENERGIZE-T, and the phase 2/3 trial of PYRUKYND® in patients with
SCD, RISE UP, offset by closeouts of ACTIVATE & ACTIVATE-T studies, and commercial launch preparation activities. The increase in other research
and platform programs costs was primarily driven by planned increased activity on various exploratory activities. Included in total indirect research and
development expenses was $9.4 million of reimbursable transition related services we provided to Servier related to the sale of the oncology business for
discovery, clinical development, technical operations, and related activities which will continue for periods ranging from one month to approximately one
year after March 31, 2021.

Total Research and Development Expenses – 2020 vs 2019 – The increase in research and development expenses of $6.5 million in 2020 compared to 2019
was primarily due to a $3.9 million increase in our direct expenses and a $2.7 million increase in our indirect expenses. The increase in direct expenses was
primarily due to a $2.5 million increase for AG-946 driven by the phase 1 trial start.

Other Income and Expense

(In thousands)
Gain on sale of oncology business
Interest income, net
Other income, net

2021

2020

2019

$

6,639  $
836 
14,433 

—  $

6,611 
— 

— 
14,861 
— 

Other Income and Expense- 2021 vs 2020 – The increase in other income, net in 2021 compared to 2020, primarily relates to approximately $13.8 million
of reimbursable transition related services and fees for the sale of the oncology business for the year ended December 31, 2021. The increase in gain on sale
of oncology business primarily relates to income from royalties on U.S. net sales of TIBSOVO® by Servier of approximately $6.6 million for the year
ended December 31, 2021. The decrease in interest income, net is primarily attributable to a decrease in interest rates.

Other Income and Expense – 2020 vs 2019 – The decrease in interest income, net in 2020 compared to 2019, is primarily attributable to the decrease in
interest rates at the end of the first quarter of 2020, which reduced the interest rates earned by 0.50% to 1.50% from prior periods and the decrease in our
outstanding marketable securities balance for the year ended December 31, 2020.

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Loss from Operations and Net Income (Loss)

(In thousands)
Net loss from continuing operations
Net income (loss) from discontinued operations, net of tax
Net income (loss)

$

2021
(356,510) $
1,961,225 
1,604,715 

2020
(329,305) $
1,935 
(327,370)

2019
(301,408)
(110,064)
(411,472)

Loss from Operations and Net Income (Loss) – 2021 vs 2020 – The increase in net loss from continuing operations in 2021 compared to 2020 was primarily
driven  by  higher  research  and  development  expenses  discussed  above  under  Research  and  Development  Expenses,  partially  offset  by  $13.9  million  of
reimbursable transition related services and fees related to the sale of the oncology business and a $6.6 million gain on sale of oncology business related to
income from royalties on U.S. net sales of TIBSOVO® by Servier. The change in net income (loss) from discontinued operations and net income (loss) for
the year ended December 31, 2021 compared to the year ended December 31, 2020 was primarily driven by the sale of our oncology business to Servier for
approximately $1.8 billion in cash in the first quarter of 2021, which is included within net income from discontinued operations.

Loss from Operations and Net Income (Loss) – 2020 vs 2019 – The increase in net loss from continuing operations in 2020 compared to 2019 was primarily
driven by higher operating expenses as described above in Total Operating Expenses. The decrease in net loss in 2020 compared to 2019 was primarily
driven by net income from discontinued operations for the year ended December 31, 2020 from the sale of the oncology business discussed above.

Liquidity and Capital Resources

Sources of liquidity

Since our inception, and through March 31, 2021, we financed our operations primarily through proceeds from the sale of our royalty rights, commercial
sales  of  TIBSOVO®,  funding  received  from  our  collaboration  agreements,  private  placements  of  our  preferred  stock,  our  initial  public  offering  of  our
common stock and concurrent private placement of common stock to an affiliate of Celgene, and our follow-on public offerings. Following the sale of our
oncology  business  to  Servier  on  March  31,  2021,  we  have  financed  and  expect  to  continue  to  finance  our  operations  primarily  through  cash  on  hand,
royalty payments from Servier with respect to U.S. net sales of TIBSOVO®, the potential milestone payment from Servier if vorasidenib is approved by
the FDA, potential sales of PYRUKYND®, if successfully launched by us and, potentially, collaborations, strategic alliances, licensing arrangements and
other nondilutive strategic transactions.

On March 31, 2021, we completed the sale of our oncology business to Servier Pharmaceuticals LLC, or Servier. The transaction included the sale of our
oncology business, including TIBSOVO®, our clinical-stage product candidates vorasidenib, AG-270 and AG-636, and our oncology research programs
for a payment of approximately $1.8 billion in cash at the closing, subject to certain adjustments, and a payment of $200 million in cash, if, prior to January
1, 2027, vorasidenib is granted new drug application, or NDA, approval from the U.S. Food and Drug Administration, or FDA, with an approved label that
permits vorasidenib’s use as a single agent for the adjuvant treatment of patients with Grade 2 glioma that have an isocitrate dehydrogenase 1 or 2 mutation
(and, to the extent required by such approval, the vorasidenib companion diagnostic test is granted an FDA premarket approval), as well as a royalty of 5%
of U.S. net sales of TIBSOVO® from the close of the transaction through loss of exclusivity, and a royalty of 15% of U.S. net sales of vorasidenib from the
first  commercial  sale  of  vorasidenib  through  loss  of  exclusivity.  Servier  also  acquired  our  co-commercialization  rights  for  Bristol  Myers  Squibb’s
IDHIFA®  and  the  right  to  receive  a  $25.0  million  potential  milestone  payment  under  our  prior  collaboration  agreement  with  Celgene  Corporation,  or
Celgene, and following the sale Servier is responsible for conducting certain clinical development activities within the IDHIFA® development program.

On March 25, 2021, we announced that our board of directors authorized the repurchase of up to $1.2 billion of our outstanding shares of common stock, or
the Repurchase Program, using the proceeds from the sale of our oncology business to Servier. On March 31, 2021, in connection with the Repurchase
Program, we entered into a definitive share repurchase agreement with Bristol-Myers Squibb Company, or BMS, to repurchase 7.1 million shares of our
common stock held by certain subsidiaries of BMS for an aggregate purchase price of $344.5 million, or $48.38 per share. This repurchase was completed
on April 5, 2021. Further, on April 2, 2021, in connection with the Repurchase Program, we entered into a Rule 10b5-1 repurchase plan pursuant to which
we may repurchase up to $600 million of shares of our common stock. As of December 31, 2021, we have repurchased approximately 9.1 million shares of
common stock for $458.0 million, or $50.35 per share, under the Rule 10b5-1 repurchase plan. On October 5, 2021, we terminated our Rule 10b5-1 share
repurchase program and on October 13, 2021 entered into a Rule 10b-18 repurchase plan that allows us to conduct open market repurchases over time up to
our remaining authorization under the Repurchase Program. In total, as of December 31, 2021, we have repurchased 16.2 million shares of common stock
for $802.5 million, or $49.49 per share, under the Repurchase Program. We have paused our share repurchases

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and for the foreseeable future, we expect that our capital allocation will be prioritized towards opportunities to accelerate programs in our development
pipeline and/or pursue potential complementary business development opportunities.

On April 30, 2020, we entered into an at-the-market sales agreement, or the 2020 sales agreement, with Cowen & Company LLC, or Cowen, pursuant to
which we may offer and sell shares of our common stock having an aggregate offering price of up to $250.0 million through Cowen pursuant to a universal
shelf  registration  statement  on  Form  S-3  filed  with  the  SEC  on  April  30,  2020.  As  of  December  31,  2021,  $250.0  million  in  common  stock  remained
available for future issuance under the 2020 sales agreement.

In November 2019, we completed a public offering of 9,487,500 shares of common stock at an offering price of $31.00 per share. We received net proceeds
from this offering of $277.2 million, after deducting underwriting discounts and commissions paid by us, certain of which are subject to reimbursement.

In addition to our existing cash, cash equivalents and marketable securities, we are eligible to earn a $200 million milestone payment, and royalty payments
under our transaction agreement with Servier. Our right to payments under our transaction agreement with Servier is our only committed potential external
source of funds. Whether the regulatory approval milestone for vorasidenib will be achieved is subject to various risks and uncertainties, many of which are
outside our control, including adverse clinical developments with respect to vorasidenib. Furthermore, we cannot predict what success, if any, Servier may
have in the United States with respect to sales of TIBSOVO® and, if approved, vorasidenib, and consequently we cannot estimate the amount of royalty
payments that we can expect to receive from Servier under the purchase agreement prior to the loss of exclusivity of these products.

Cash flows

The following table provides information regarding our cash flows for the years ended December 31, 2021, 2020 and 2019:
(In thousands)
Net cash used in operating activities
Net cash provided by investing activities
Net cash (used in) provided by financing activities
Net change in cash and cash equivalents

2021
(407,320) $
1,248,778 
(765,768)

75,690  $

$

$

2020
(290,759) $
75,746 
261,518 
46,505  $

2019
(370,622)
91,440 
289,611 
10,429 

Net cash used in operating activities

Cash used in operating activities of $407.3 million during the year ended December 31, 2021, of which $314.1 million was used by continuing operations
and $93.2 million was used by discontinued operations, was primarily due to operating expenses driven by research and development costs described above
in  Research  and  Development  Expenses,  offset  by  cash  received  of  $39.5  million  from  sales  of  TIBSOVO®,  and  $1.2  million  in  cost  reimbursements
related to our collaboration agreements with Celgene.

Cash used in operating activities of $290.8 million during the year ended December 31, 2020, of which $243.9 million was used by continuing operations
and $46.8 million was used by discontinued operations, was primarily due to operating expenses driven by research and development costs described above
in Research and Development Expenses, offset by cash received of $123.8 million from sales of TIBSOVO®, $7.9 million in royalty payments and $6.1
million  in  cost  reimbursements  related  to  our  Collaboration  Agreements  with  Celgene,  $7.0  million  in  interest  received,  and  $3.6  million  in  cost
reimbursements related to our agreement with CStone Pharmaceuticals.

Cash used in operating activities of $370.6 million during the year ended December 31, 2019, of which $236.2 million was used by continuing operations
and  $134.5  million  was  used  by  discontinued  operations,  was  primarily  due  to  operating  expenses  driven  by  research  and  development  costs  described
above  in  Research  and  Development  Expenses,  offset  by  cash  received  of  $60.7  million  from  product  sales  of  TIBSOVO®,  $19.1  million  in  cost
reimbursements and royalty payments under our Collaboration Agreements with Celgene, and a $5.0 million milestone payment under our agreement with
CStone Pharmaceuticals.

Net cash provided by investing activities

The cash provided by investing activities for the year ended December 31, 2021, of which $1,802.9 million was provided by discontinued operations and
$554.2  million  was  used  by  continuing  operations  was  primarily  due  to  the  approximately  $1.8  billion  in  cash  proceeds  received  from  the  sale  of  our
oncology  business  to  Servier  that  was  completed  on  March  31,  2021,  and  the  result  of  higher  purchases  of  marketable  securities  than  proceeds  from
maturities and sales of marketable securities.

The  cash  provided  by  investing  activities  for  the  year  ended  December  31,  2020,  of  which  $76.5  million  was  provided  by  continuing  operations  and
$0.8 million was used by discontinued operations was primarily the result of lower purchases of

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marketable securities than proceeds from maturities and sales of marketable securities, offset by $14.9 million in purchases of property and equipment.

The  cash  provided  by  investing  activities  for  the  year  ended  December  31,  2019,  of  which  $91.6  million  was  provided  by  continuing  operations  and
$0.1 million was used by discontinued operations was primarily the result of lower purchases of marketable securities than proceeds from maturities and
sales of marketable securities, offset by $12.0 million in purchases of property and equipment.

Net cash (used in) provided by financing activities

The cash used in financing activities for the year ended December 31, 2021 was primarily the due to the repurchase of common stock under our Repurchase
Program  of  $802.5  million,  partially  offset  by  $37.3  million  of  proceeds  received  from  stock  option  exercises  and  purchases  made  pursuant  to  our
employee stock purchase plan.

The cash provided by financing activities for the year ended December 31, 2020 was primarily the result of net proceeds of $250.5 million from the sale of
our tiered, sales-based royalty rights on worldwide net sales of IDHIFA® (enasidenib) and our ex-US regulatory milestones to RPI in June 2020, and the
$11.3 million of proceeds received from stock option exercises and purchases made pursuant to our employee stock purchase plan.

The cash provided by financing activities for the year ended December 31, 2019 was primarily the result of proceeds of $277.2 million from the November
2019 follow-on public offering, net of underwriting discounts and commissions, as well as proceeds of $12.5 million received from stock option exercises
and purchases made pursuant to our employee stock purchase plan.

Funding requirements

Although our expenses decreased following the completion of the sale of our oncology business to Servier on March 31, 2021, we anticipated that this
decrease  will  be  offset  as  we  continue  the  research,  development  and  clinical  trials  of,  seek  marketing  approvals  for,  and  commercialize  our  product
candidates in our GDD portfolio, including as we commercialize PYRUKYND®. If we obtain marketing approval for PYRUKYND® in other indications
our outside of the united states or for any of our product candidates, we expect to incur significant commercialization expenses related to product sales,
marketing, manufacturing and distribution.

We expect that our existing cash, cash equivalents and marketable securities as of December 31, 2021, will enable us to execute our operating plan through
major  catalysts  and  to  cash-flow  positivity  without  the  need  to  raise  additional  equity.  Our  future  capital  requirements  will  depend  on  many  factors,
including:

•

•

•

•

•

•

•

•

•

•

•

the amount of contingent consideration we ultimately receive in connection with the sale of our oncology business to Servier;

the amount and timing of revenue, if any, received from commercial sales of PYRUKYND® or any of our product candidates for which we receive
marketing approval;

the costs and timing of commercialization activities, including product manufacturing, sales, marketing and distribution for PYRUKYND®;

the scope, progress, results and costs of drug discovery, preclinical development, laboratory testing and clinical trials for our product candidates;

the costs, timing and outcome of regulatory review of our product candidates;

the  costs  of  preparing,  filing  and  prosecuting  patent  applications,  maintaining  and  enforcing  our  intellectual  property  rights  and  defending
intellectual property-related claims;

the  costs  and  timing  of  future  commercialization  activities,  including  product  manufacturing,  sales,  marketing  and  distribution,  for  any  of  our
product candidates for which we may receive marketing approval;

our ability to establish and maintain collaborations on favorable terms, if at all;

our ability to successfully execute on our strategic plans;

operational delays due to the ongoing COVID-19 pandemic; and

the extent to which we acquire or in-license, or monitor or out-license, other medicines and technologies.

Until  such  time,  if  ever,  as  we  can  generate  substantial  product  revenue,  we  expect  to  finance  our  cash  needs  primarily  through  cash  on  hand,  royalty
payments from Servier with respect to U.S. net sales of TIBSOVO®, a potential milestone payment from Servier if vorasidenib is approved by the FDA
and,  potentially,  collaborations,  strategic  alliances,  licensing  arrangements  and  other  nondilutive  strategic  transactions.  In  addition,  in  connection  with
potential future strategic transactions, we may pursue opportunistic debt offerings, and equity or equity-linked offerings. We do not have any committed
external source of funds other than the potential milestone and royalty payments that we are eligible to receive under our purchase agreement with Servier.
To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership

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interest of our stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of
our common stockholders. Debt financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific
actions, such as incurring additional debt, making capital expenditures or declaring dividends.

If we raise funds through collaborations, strategic alliances or licensing arrangements with third parties, we may have to relinquish valuable rights to our
technologies, future revenue streams, research programs or product candidates, or grant licenses on terms that may not be favorable to us. If we are unable
to raise additional funds through equity or debt financings when needed or on attractive terms, we may be required to delay, limit, reduce or terminate our
product  development  or  future  commercialization  efforts,  or  grant  rights  to  develop  and  market  product  candidates  that  we  would  otherwise  prefer  to
develop and market ourselves.

Off-Balance Sheet Arrangements

We did not have, during the periods presented, and we do not currently have, any off-balance sheet arrangements, as defined under applicable SEC rules.

Contractual Obligations

The following table summarizes our significant contractual obligations as of the payment due date by period at December 31, 2021:

(In thousands)
Operating lease obligations (1)
Manufacturing arrangements (2)
Service arrangements (3)

Payments due by period

$

Total

116,238  $
1,012 
10,000 

Less
than
1 year

1-3
years

3-5
years

More
than
5 years

15,560  $
— 
2,000 

36,786  $
675 
4,000 

39,658  $
337 
4,000 

24,234 
— 
— 

(1) Relates payment obligations under lease agreements covering approximately 146,000 square feet at 88 Sidney Street, 43,000 square feet at 64 Sidney Street, and 13,000 square feet at 38
Sidney Street, Cambridge, Massachusetts. All leases, as amended, expire on February 29, 2028. At the end of the initial lease period, we have the option to extend the leases at all facilities for
two consecutive five year periods at the fair market rent at the time of the extension.

(2) Relates to payment obligations under a packaging and supply agreement for drug product.

(3) Relates to payment obligations under a development and manufacturing services agreement for drug product.

We enter into agreements in the normal course of business with CROs for clinical trials and contract manufacturing organizations, or CMOs, for supply
manufacturing and with vendors for preclinical research studies and other services and products for operating purposes. These contractual obligations are
cancelable at any time by us, generally upon prior written notice to the vendor, and are thus not included in the contractual obligations table. The service
arrangement  included  in  the  table  above  is  for  a  contractual  term  of  five  years,  however,  the  total  funds  can  be  allocated  in  any  manner  to  meet  the
agreement terms. Amounts included assume equal payments each year.

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

We are exposed to market risk related to changes in interest rates. As of December 31, 2021, we had cash, cash equivalents and marketable securities of
$1,286.4 million, consisting primarily of investments in U.S. Treasuries, and government and corporate debt securities. Our primary exposure to market
risk is interest rate sensitivity, which is affected by changes in the general level of U.S. interest rates, particularly because our investments are in short-term
marketable securities. Our marketable securities are subject to interest rate risk and could fall in value if market interest rates increase. Due to the short-
term duration of our investment portfolio and the low risk profile of our investments, we do not believe an immediate and uniform 100 basis point increase
in interest rates would have a material effect on the fair market value of our investment portfolio.

We are also exposed to market risk related to changes in foreign currency exchange rates. We have contracts with CROs and CMOs that are located in Asia
and Europe that are denominated in foreign currencies. We are subject to fluctuations in foreign currency rates in connection with these agreements. We do
not  currently  hedge  our  foreign  currency  exchange  rate  risk.  As  of  December  31,  2021  and  December  31,  2020,  we  had  minimal  or  no  liabilities
denominated in foreign currencies.

Item 8. Financial Statements and Supplementary Data

The  financial  statements  required  to  be  filed  pursuant  to  this  Item  8  are  appended  to  this  Annual  Report  on  Form  10-K.  An  index  of  those  financial
statements is found in Item 15, Exhibits and Financial Statement Schedules, of this Annual Report on Form 10-K.

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Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our principal executive officer and our principal financial officer, evaluated, as of the end of the period covered
by this Annual Report on Form 10-K, the effectiveness of our disclosure controls and procedures. Based on that evaluation of our disclosure controls and
procedures as of December 31, 2021, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures as
of such date are effective at the reasonable assurance level. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e)
under  the  Exchange  Act,  means  controls  and  other  procedures  of  a  company  that  are  designed  to  ensure  that  information  required  to  be  disclosed  by  a
company in the reports that it files or submits under the Exchange Act are recorded, processed, summarized and reported within the time periods specified
in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information
required to be disclosed by us in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our
principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure. Management recognizes
that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and our
management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Management’s Annual Report on Internal Control over Financial Reporting

Our  management  is  responsible  for  establishing  and  maintaining  adequate  internal  control  over  our  financial  reporting.  Internal  control  over  financial
reporting  is  defined  in  Rules  13a-15(f)  and  15d-15(f)  promulgated  under  the  Exchange  Act  as  a  process  designed  by,  or  under  the  supervision  of,  our
principal executive and principal financial officers and effected by our board of directors, management and other personnel to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with U.S. GAAP. Our internal
control over financial reporting includes those policies and procedures that:

•

•

•

pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect our transactions and dispositions of our assets;

provide  reasonable  assurance  that  transactions  are  recorded  as  necessary  to  permit  preparation  of  financial  statements  in  accordance  with  U.S.
GAAP, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors; and

provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a
material effect on our financial statements.

Because  of  its  inherent  limitations,  internal  control  over  financial  reporting  may  not  prevent  or  detect  misstatements.  Projections  of  any  evaluation  of
effectiveness  to  future  periods  are  subject  to  the  risk  that  controls  may  become  inadequate  because  of  changes  in  conditions,  or  that  the  degree  of
compliance with the policies or procedures may deteriorate.

Our  management  assessed  the  effectiveness  of  our  internal  control  over  financial  reporting  as  of  December  31,  2021.  In  making  this  assessment,
management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in its 2013 Internal Control –
  Integrated  Framework.  Based  on  our  assessment,  our  management  has  concluded  that,  as  of  December  31,  2021,  our  internal  control  over  financial
reporting is effective based on those criteria.

The  effectiveness  of  our  internal  control  over  financial  reporting  as  of  December  31,  2021,  has  been  audited  by  PricewaterhouseCoopers  LLP,  an
independent registered public accounting firm, as stated in their report, which is included herein.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the
fiscal  quarter  ended  December  31,  2021  that  have  materially  affected,  or  are  reasonably  likely  to  materially  affect,  our  internal  control  over  financial
reporting.

Item 9B. Other Information

None.

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Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

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Item 10. Directors, Executive Officers and Corporate Governance

PART III

The information required by this Item 10 will be included in our definitive proxy statement to be filed with the Securities and Exchange Commission, or
SEC, with respect to our 2022 Annual Meeting of Stockholders and is incorporated herein by reference. 

Item 11. Executive Compensation

The  information  required  by  this  Item  11  will  be  included  in  our  definitive  proxy  statement  to  be  filed  with  the  SEC  with  respect  to  our  2022  Annual
Meeting of Stockholders and is incorporated herein by reference.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The  information  required  by  this  Item  12  will  be  included  in  our  definitive  proxy  statement  to  be  filed  with  the  SEC  with  respect  to  our  2022  Annual
Meeting of Stockholders and is incorporated herein by reference.

Item 13. Certain Relationships and Related Transactions, and Director Independence

The  information  required  by  this  Item  13  will  be  included  in  our  definitive  proxy  statement  to  be  filed  with  the  SEC  with  respect  to  our  2022  Annual
Meeting of Stockholders and is incorporated herein by reference.

Item 14. Principal Accountant Fees and Services

The  information  required  by  this  Item  14  will  be  included  in  our  definitive  proxy  statement  to  be  filed  with  the  SEC  with  respect  to  our  2022  Annual
Meeting of Stockholders and is incorporated herein by reference.

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Item 15. Exhibits and Financial Statement Schedules

(1)   Financial Statements

PART IV

The following documents are included on pages F-1 through F-27 attached hereto and are filed as part of this Annual Report on Form 10-K.

Report of Independent Registered Public Accounting Firm (PCAOB ID 238)
Consolidated Balance Sheets
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Income (Loss)
Consolidated Statements of Stockholders’ Equity
Consolidated Statements of Cash Flows
Notes to Consolidated Financial Statements

2
4
5
6
7
8
9

(2)   Financial Statement Schedules

Schedules have been omitted since they are either not required or not applicable or the information is otherwise included herein.

(3)   Exhibits

Exhibit
  Number  
2.1+

3.1

3.2
4.1

4.2

10.1#
10.2#

10.3#

10.4#
10.5#

10.6#

10.7#

Description of Exhibit

Purchase and Sale Agreement, dated as of
December 20, 2020, by and among the Registrant,
Servier Pharmaceuticals, LLC, and, solely for
purposes of guaranteeing certain obligations of the
Purchaser, Servier S.A.S
Restated Certificate of Incorporation of the
Registrant
Second Amended and Restated By-Laws
Specimen Stock Certificate evidencing the shares
of common stock
Description of Securities Registered Under
Section 12 of the Securities Exchange Act of 1934
2007 Stock Incentive Plan
Form of Incentive Stock Option Agreement under
2007 Stock Incentive Plan
Form of Nonstatutory Stock Option Agreement
under 2007 Stock Incentive Plan
2013 Stock Incentive Plan
Form of Incentive Stock Option Agreement under
2013 Stock Incentive Plan
Form of Nonstatutory Stock Option Agreement
under 2013 Stock Incentive Plan
2013 Employee Stock Purchase Plan

Incorporated by Reference

File
Number  
001-36014

Date of Filing
December 22, 2020

001-36014

July 30, 2013

001-36014
333-189216

December 19, 2018
June 24, 2013

Form
8-K

8-K

8-K
S-1

10-K

001-36014

February 19, 2020

333-189216
333-189216

June 10, 2013
June 10, 2013

333-189216

June 10, 2013

333-189216
333-189216

June 24, 2013
June 24, 2013

333-189216

June 24, 2013

333-189216

June 24, 2013

S-1
S-1

S-1

S-1
S-1

S-1

S-1

73

Exhibit
Number

Filed
Herewith

2.1

3.1 

3.1 
4.1 

4.3 

10.1 
10.2 

10.3 

10.4 
10.5 

10.6 

10.7 

Table of Contents

Exhibit
  Number  
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#
10.21†

10.22#

10.23

Description of Exhibit
Form of Indemnification Agreement between the
Registrant and each of its Executive Officers and
Directors
Letter Agreement, dated as of April 1, 2014,
between the Registrant and Christopher Bowden,
Ph.D.
Discovery and Development Collaboration and
License Agreement, dated as of April 14, 2010, as
amended on October 3, 2011, between the
Registrant and Celgene Corporation
Third Amendment to Discovery and Development
Collaboration and License Agreement, dated
July 14, 2014 between the Registrant and Celgene
Corporation
Common Stock Purchase Agreement, dated as of
July 16, 2013, between the Registrant and Celgene
Alpine Investment Co., LLC
Lease, dated as of September 15, 2014, between
the Registrant and Forest City 88 Sidney, LLC
First Amendment to Lease for 88 Sidney Street,
dated as of November 21, 2014, between the
Registrant and Forest City 88 Sidney, LLC
Summary Description of Annual Cash Incentive
Program
Second Amendment to Lease for 88 Sidney Street,
dated July 20, 2015, by and between the
Registrant and Forest City 88 Sidney Street, LLC
Collaboration and License Agreement by and
between the Registrant and Celgene Corporation
Re: AGI-23088 for the US Territory, dated as of
April 27, 2015
Collaboration and License Agreement by and
between Agios International Sarl and Celgene
International II Sarl Re: AGI-23088 for the ROW
Territory, dated as of April 27, 2015
Form of Performance Share Unit Agreement under
2013 Stock Incentive Plan
Severance Benefits Plan
Master Research and Collaboration Agreement,
dated May 17, 2016, by and among the Registrant,
Celgene Corporation and Celgene RIVOT Ltd.
Letter Agreement between the Registrant and
Andrew Hirsch, effective August 11, 2016
Lease, dated as of November 17, 2017, between
the Registrant and UP 64 Sidney Street, LLC

Incorporated by Reference

Form
S-1

File
Number  
333-189216

Date of Filing

Exhibit
Number

Filed
Herewith

July 11, 2013

10.12 

10-K

001-36014

February 26, 2016

10.13 

S-1

333-189216

July 16, 2013

10.14 

10-K

001-36014

February 24, 2015

10.15 

S-1

8-K

8-K

10-Q

8-K

333-189216

July 16, 2013

10.15 

001-36014

September 19, 2014

001-36014

November 26, 2014

001-36014

001-36014

May 11, 2015

July 23, 2015

10.1 

10.1 

10.1 

10.1 

10-Q

001-36014

August 7, 2015

10.1 

10-Q

001-36014

August 7, 2015

10.2 

001-36014

February 26, 2016

10.25 

001-36014
001-36014

April 22, 2016
August 8, 2016

001-36014

August 16, 2016

001-36014

November 22, 2017

10.1 
10.1 

99.2 

10.1 

10-K

8-K
10-Q

8-K

8-K

74

Table of Contents

Exhibit
  Number  
10.24

10.25

10.26#

10.27†

10.28#

10.29#

10.30#

10.31

10.32

10.33

10.34#

10.35#

10.36†

10.37†

10.38†

10.39

Description of Exhibit
Third Amendment to Lease for 88 Sidney Street,
dated November 17, 2017, by and between the
Registrant and Forest City 88 Sidney Street, LLC
First Amendment of Lease, dated April 11, 2018,
by and between UP 64 Sidney Street, LLC and
Agios Pharmaceuticals. Inc.
Form of Restricted Stock Unit Agreement under
2013 Stock Incentive Plan (for employees)
License Agreement, dated June 25, 2018, by and
between Agios Pharmaceuticals, Inc. and CStone
Pharmaceuticals
Amended and Restated Letter Agreement, dated as
of August 30, 2018, between the Registrant and
David P. Schenkein, M.D.
Letter Agreement, dated as of August 30, 2018,
between the Registrant and Jacqualyn A. Fouse,
Ph.D.
Form of Restricted Stock Unit Agreement under
2013 Stock Incentive Plan (for directors)
Lease, dated as of April 11, 2019, by and between
the Registrant and Thirty-Eight Sidney Street
Limited LLC
Fourth Amendment to Lease, dated as of April 11,
2019, by and between the Registrant and Forest
City 88 Sidney Street, LLC
Third Amendment of Lease, dated as of April 11,
2019, by and between the Registrant and UP 64
Sidney Street, LLC
Letter Agreement, dated as of September 17,
2019, between the Registrant and Jonathan Biller
Letter Agreement, dated as of October 7, between
the Registrant and Bruce Car
Amendment to Master Research and Collaboration
Agreement, dated as of February 5, 2020, by and
among the Registrant, Celgene Corporation and
Celgene RIVOT Ltd
Amendment I to License Agreement, dated as of
March 2, 2020, by and between the Registrant and
CStone Pharmaceuticals
Amendment II to License Agreement, dated as of
March 2, 2020, by and between the Registrant and
CStone Pharmaceuticals
Sales Agreement, dated April 30, 2020, by and
between the Registrant and Cowen and Company,
LLC

Incorporated by Reference

Form
8-K

File
Number  
001-36014

Date of Filing

Exhibit
Number

Filed
Herewith

November 22, 2017

10.2 

8-K

001-36014

April 13, 2018

10.1 

10-Q

10-Q

001-36014

May 4, 2018

001-36014

August 2, 2018

10.1 

10.2 

10-Q

001-36014

November 1, 2018

10.1 

10-Q

001-36014

November 1, 2018

10.2 

10-K

10-Q

001-36014

February 14, 2019

10.32 

001-36014

August 1, 2019

10.1 

10-Q

001-36014

August 1, 2019

10.2 

10-Q

001-36014

August 1, 2019

10.3 

10-K

10-Q

10-Q

001-36014

February 19, 2020

10.35

001-36014

April 30, 2020

001-36014

April 30, 2020

10.1

10.2

10-Q

001-36014

April 30, 2020

10.3

10-Q

001-36014

April 30, 2020

10.4

S-3ASR

333-237930

April 30, 2020

1.2

75

Table of Contents

Exhibit
  Number  
10.40†

10.41

10.42#

10.43

10.44

21.1
23.1

31.1

31.2

32.1*

32.2*

101.INS
101.SCH
101.CAL
101.DEF

101.LAB
101.PRE

104

#
†

Description of Exhibit
Royalty Purchase Agreement, dated as of June 11,
2020, by and between the Registrant and RPI 2019
Intermediate Finance Trust
Share Repurchase Agreement, dated as of March
31, 2021, by and between the Registrant and
Bristol-Myers Squibb Company
Letter Agreement, dated as of July 27, 2021,
between the Registrant and Chris Bowden, M.D.
Sublease Agreement, dated July 27, 2021, between
the Registrant and Prime Medicine, Inc. (38
Sidney Street)
Sublease Agreement, dated July 27, 2021, between
the Registrant and Prime Medicine, Inc. (64
Sidney Street)
Subsidiaries of the Registrant
Consent of PricewaterhouseCoopers LLP, an
Independent Registered Public Accounting Firm
Certification of principal executive officer
pursuant to Rule 13a-14(a)/15d-14(a) of the
Securities Exchange Act of 1934, as amended
Certification of principal financial officer pursuant
to Rule 13a-14(a)/15d-14(a) of the Securities
Exchange Act of 1934, as amended.
Certification of principal executive officer
pursuant to 18 U.S.C. §1350, as adopted pursuant
to Section 906 of the Sarbanes-Oxley Act of 2002.
Certification of principal financial officer pursuant
to 18 U.S.C. §1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002.
XBRL Instance Document
XBRL Taxonomy Extension Schema Document
XBRL Taxonomy Calculation Linkbase Document
XBRL Taxonomy Extension Definition Linkbase
Document
XBRL Taxonomy Label Linkbase Document
XBRL Taxonomy Presentation Linkbase
Document
Cover Page Interactive Data File (formatted as
Inline XBRL and contained in Exhibit 101)

Incorporated by Reference

Form
10-Q

File
Number  
001-36014

Date of Filing

Exhibit
Number

Filed
Herewith

July 30, 2020

10.2

10-Q

001-36014

April 29, 2021

10-Q

10-Q

001-36014

November 3, 2021

001-36014

November 3, 2021

10.1

10.1

10.2

X

X

X

X

X

X

X
X
X
X

X
X

X

Indicates management contract or compensatory plan or arrangement.
Confidential treatment has been granted as to certain portions, which portions have been omitted and filed separately with the Securities
and Exchange Commission.

76

Table of Contents

Incorporated by Reference

Exhibit
  Number  
+

*

Description of Exhibit

Filed
Herewith
Pursuant to Item 601(6)(2) of Regulation S-K, the disclosure schedules to the Purchase Agreement (identified therein) have been omitted
from this Current Report on Form 8-K and will be furnished to the SEC supplementally upon request.
This certification will not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or the
Exchange Act, or otherwise subject to the liability of that section. Such certification will not be deemed to be incorporated by reference into
any filing under the Securities Act of 1933, as amended, or the Exchange Act, except to the extent specifically incorporated by reference
into such filing.

File
Number  

Exhibit
Number

Date of Filing

Form

Item 16. Form 10-K Summary

None.

77

Table of Contents

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be

signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

February 24, 2022

AGIOS PHARMACEUTICALS, INC.

By:

/s/ Jacqualyn A. Fouse
Jacqualyn A. Fouse, Ph.D.
Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of

the registrant and in the capacities and on the dates indicated.

Signature

/s/ Jacqualyn A. Fouse
Jacqualyn A. Fouse, Ph.D.

/s/ Jonathan Biller
Jonathan Biller

/s/ T.J. Washburn
T.J. Washburn

/s/ Paul J. Clancy
Paul J. Clancy

/s/ Ian Clark
Ian Clark

/s/ Kaye Foster
Kaye Foster

/s/ Maykin Ho
Maykin Ho, Ph.D.

/s/ John M. Maraganore
John M. Maraganore, Ph.D.

/s/ David Scadden
David Scadden, M.D.

/s/ David P. Schenkein
David P. Schenkein, M.D.

Title
Chief Executive Officer
and Director
(Principal executive officer)

Chief Financial Officer and Head of
Corporate Affairs
(Principal financial officer)

Senior Director of Accounting
(Principal accounting officer)

Date
February 24, 2022

February 24, 2022

February 24, 2022

Director

February 24, 2022

Director

February 24, 2022

Director

February 24, 2022

Director

February 24, 2022

Director

February 24, 2022

Director

Director

February 24, 2022

February 24, 2022

78

Table of Contents

Agios Pharmaceuticals, Inc.

Index to Consolidated Financial Statements

Report of Independent Registered Public Accounting Firm (PCAOB ID 238)
Consolidated Balance Sheets
Consolidated Statements of Operations
Consolidated Statements of Comprehensive Income (Loss)
Consolidated Statements of Stockholders’ Equity
Consolidated Statements of Cash Flows
Notes to Consolidated Financial Statements

F-1

2
4
5
6
7
8
9

Table of Contents

To the Board of Directors and Stockholders of Agios Pharmaceuticals, Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting

Report of Independent Registered Public Accounting Firm

We have audited the accompanying consolidated balance sheets of Agios Pharmaceuticals, Inc. and its subsidiaries (the “Company”) as of December 31,
2021 and 2020, and the related consolidated statements of operations, of comprehensive income (loss), of stockholders’ equity and of cash flows for each
of the three years in the period ended December 31, 2021, including the related notes (collectively referred to as the “consolidated financial statements”).
We also have audited the Company's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control -
Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of
December 31, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021 in
conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material
respects,  effective  internal  control  over  financial  reporting  as  of  December  31,  2021,  based  on  criteria  established  in  Internal  Control  -  Integrated
Framework (2013) issued by the COSO.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting,
and for its assessment of the effectiveness of internal control over financial reporting, included in Management's Annual Report on Internal Control over
Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on the Company’s consolidated financial  statements  and  on  the
Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting
Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities
laws and the applicable rules and regulations of the Securities 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 audits to obtain reasonable
assurance  about  whether  the  consolidated  financial  statements  are  free  of  material  misstatement,  whether  due  to  error  or  fraud,  and  whether  effective
internal control over financial reporting was maintained in all material respects.

Our  audits  of  the  consolidated  financial  statements  included  performing  procedures  to  assess  the  risks  of  material  misstatement  of  the  consolidated
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  consolidated  financial  statements.  Our  audits  also  included  evaluating  the  accounting
principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our
audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a
material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also
included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our
opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed 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. A company’s internal control
over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly
reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit
preparation  of  financial  statements  in  accordance  with  generally  accepted  accounting  principles,  and  that  receipts  and  expenditures  of  the  company  are
being  made  only  in  accordance  with  authorizations  of  management  and  directors  of  the  company;  and  (iii)  provide  reasonable  assurance  regarding
prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial
statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of
effectiveness  to  future  periods  are  subject  to  the  risk  that  controls  may  become  inadequate  because  of  changes  in  conditions,  or  that  the  degree  of
compliance with the policies or procedures may deteriorate.

Critical Audit Matters

The  critical  audit  matter  communicated  below  is  a  matter  arising  from  the  current  period  audit  of  the  consolidated  financial  statements  that  was
communicated or required to be communicated to the audit committee and that (i) relates to accounts or

F-2

Table of Contents

disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The
communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by
communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Discontinued Operations - Expenses Directly Attributable to the Oncology Business

As  described  in  Notes  2  and  3  to  the  consolidated  financial  statements,  on  March  31,  2021,  the  Company  completed  the  sale  of  its  oncology  business,
including  TIBSOVO®,  its  clinical-stage  product  candidates  vorasidenib,  AG-270  and  AG-636,  and  its  oncology  research  programs,  to  Servier
Pharmaceuticals LLC for a payment of approximately $1.8 billion, a payment of $200 million if, prior to January 1, 2027, vorasidenib is granted new drug
application  approval  from  the  U.S.  Food  and  Drug  Administration,  a  royalty  of  5%  of  U.S.  net  sales  of  TIBSOVO®  from  the  close  of  the  transaction
through loss of exclusivity, and a royalty of 15% of U.S. net sales of vorasidenib from the first commercial sale of vorasidenib through loss of exclusivity.
Management accounted for the sale of the oncology business as a discontinued operation given the sale of the business represented a strategic shift that had
a major effect on the Company’s operations and financial results. As a result, management has classified the results of the oncology business, including the
research  and  development,  marketing,  selling  and  general  and  administrative  expenses  incurred  directly  to  solely  support  the  oncology  business,  as
discontinued operations in the consolidated statements of operations for all periods presented. The Company has included in discontinued operations $41.6
million in research and development expenses and $8.6 million in selling, general and administrative expenses for the year ended December 31, 2021.

The  principal  consideration  for  our  determination  that  performing  procedures  relating  to  discontinued  operations  -  expenses  directly  attributable  to  the
oncology  business  is  a  critical  audit  matter  is  the  significant  audit  effort  involved  in  performing  procedures  related  to  management’s  determination  and
classification of the expenses incurred directly to solely support the oncology business as discontinued operations.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated
financial  statements.  These  procedures  included  testing  the  effectiveness  of  controls  relating  to  discontinued  operations,  including  controls  over
management’s  determination  of  the  expenses  incurred  directly  to  solely  support  the  oncology  business.  These  procedures  also  included,  among  others,
evaluating management’s process for identifying expenses incurred directly to solely support the oncology business and testing the completeness, accuracy,
and classification of operating expenses between discontinued operations and continuing operations in the consolidated financial statements.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts
February 24, 2022

We have served as the Company’s auditor since 2017.

F-3

 
Table of Contents

(In thousands) December 31:
Assets
Current assets:

Cash and cash equivalents
Marketable securities
Other receivable
Prepaid expenses and other current assets
Current assets of discontinued operations

Total current assets

Marketable securities
Operating lease assets
Property and equipment, net
Financing lease assets
Other non-current assets
Non-current assets of discontinued operations

Total assets

Liabilities and stockholders’ equity
Current liabilities:

Accounts payable
Accrued expenses
Operating lease liabilities
Financing lease liabilities
Current liabilities of discontinued operations

Total current liabilities

Operating lease liabilities, net of current portion
Financing lease liabilities, net of current portion
Non-current liabilities of discontinued operations

Total liabilities

Commitments and contingent liabilities (Note 9)
Stockholders’ equity:

Agios Pharmaceuticals, Inc.

Consolidated Balance Sheets

2021

2020

$

$

$

$

203,126  $
816,892 
4,378 
39,835 
— 
1,064,231 
266,375 
75,124 
28,923 
183 
2,900 
— 

1,437,736  $

16,700  $
31,967 
10,828 
331 
— 
59,826 
85,659 
276 
— 
145,761 

127,436 
445,493 
— 
15,889 
47,859 
636,677 
97,608 
84,661 
30,815 
590 
— 
2,601 
852,952 

17,724 
30,801 
7,093 
317 
38,459 
94,394 
97,458 
331 
261,269 
453,452 

— 
71 

2,334,348 
(1,198)
(238,760)
(802,486)
1,291,975 
1,437,736  $

— 
69 

2,242,801 
105 
(1,843,475)
— 
399,500 
852,952 

Preferred stock, $0.001 par value; 25,000,000 shares authorized, no shares issued and outstanding at December
31, 2021 and 2020
Common stock, $0.001 par value; 125,000,000 shares authorized; 70,550,631 shares issued and 54,334,220
outstanding at December 31, 2021 and 69,293,920 shares issued and outstanding at December 31, 2020
Additional paid-in capital
Accumulated other comprehensive (loss) income
Accumulated deficit
Treasury stock, at cost (16,216,411 shares at December 31, 2021 and no shares at December 31, 2020)

Total stockholders’ equity
Total liabilities and stockholders’ equity

See accompanying Notes to Consolidated Financial Statements.

F-4

Table of Contents

Agios Pharmaceuticals, Inc.

Consolidated Statements of Operations

(In thousands, except share and per share data) Years Ended December 31:
Cost and expenses:

Research and development
Selling, general and administrative

Total cost and expenses
Loss from operations

Gain on sale of oncology business
Interest income, net
Other income, net
Net loss from continuing operations
Net income (loss) from discontinued operations, net of tax

Net income (loss)

Net loss from continuing operations per share - basic and diluted
Net income (loss) from discontinued operations per share - basic and diluted
Net income (loss) per share - basic and diluted
Weighted-average number of common shares used in computing net loss per share from
continuing operations, net income (loss) per share from discontinued operations and net income
(loss) per share – basic and diluted

2021

2020

2019

$

$
$
$
$

256,973  $
121,445 
378,418 
(378,418)
6,639 
836 
14,433 
(356,510)
1,961,225 
1,604,715  $
(5.90) $
32.45  $
26.55  $

220,811  $
115,105 
335,916 
(335,916)
— 
6,611 
— 
(329,305)
1,935 
(327,370) $
(4.77) $
0.03  $
(4.74) $

214,262 
102,007 
316,269 
(316,269)
— 
14,861 
— 
(301,408)
(110,064)
(411,472)
(5.02)
(1.84)
(6.86)

60,447,346 

68,997,879 

59,994,539 

 See accompanying Notes to Consolidated Financial Statements.

F-5

 
Table of Contents

Agios Pharmaceuticals, Inc.

Consolidated Statements of Comprehensive Income (Loss)

(In thousands) Years Ended December 31:
Net income (loss)
Other comprehensive (loss) income:

Unrealized (loss) gain on available-for-sale securities

Comprehensive income (loss)

2021
1,604,715  $

2020
(327,370) $

2019
(411,472)

(1,303)
1,603,412  $

(97)
(327,467) $

2,373 
(409,099)

$

$

See accompanying Notes to Consolidated Financial Statements.

F-6

 
Table of Contents

Agios Pharmaceuticals, Inc.

Consolidated Statements of Stockholders’ Equity

(In thousands, except share amounts)

Balance at December 31, 2018

Shares
58,218,653  $

Unrealized gain on available-for-sale
securities
Net loss
Stock-based compensation expense
Issuance of common stock under stock
incentive and employee stock purchase
plans
Issuance of common stock for follow-on
offering
Disposition of oncology business

— 
— 
— 

694,952 

9,487,500 
— 

Balance at December 31, 2019

68,401,105  $

Unrealized loss on available-for-sale
securities
Net loss
Stock-based compensation expense
Issuance of common stock under stock
incentive and employee stock purchase
plans
Disposition of oncology business

— 
— 
— 

892,815 
— 

Balance at December 31, 2020

69,293,920  $

Unrealized loss on available-for-sale
securities
Net income
Stock-based compensation expense
Issuance of common stock under stock
incentive and employee stock purchase
plans
Repurchase of common stock
Disposition of oncology business

— 
— 
— 

1,256,711 
— 
— 

Balance at December 31, 2021

70,550,631  $

Common Stock

Additional
Paid-In
Capital

Accumulated
Other
Comprehensive
Income (Loss)

Amount

58 

$

1,794,283 

$

(2,171)

$

— 
— 
— 

1 

9 
— 
68 

— 
— 
— 

1 
— 
69 

— 
— 
— 

2 
— 
— 
71 

$

$

$

— 
— 
58,050 

12,515 

277,192 
14,323 
2,156,363 

— 
— 
61,602 

11,316 
13,520 
2,242,801 

— 
— 
53,508 

37,294 
— 
745 
2,334,348 

$

$

$

2,373 
— 
— 

— 

— 
— 
202 

(97)
— 
— 

— 
— 
105 

(1,303)
— 
— 

— 
— 
— 
(1,198)

$

$

$

Treasury

Accumulated
Deficit
(1,104,633)

Shares

Amount

Total
Stockholders’
Equity

—  $

—  $

687,537 

— 
(411,472)
— 

— 

— 
— 
(1,516,105)

— 
(327,370)
— 

— 
— 
(1,843,475)

— 
1,604,715 
— 

— 
— 
— 

— 

— 
— 
—  $

— 
— 
— 

— 
— 
—  $

— 
— 
— 

— 
— 
— 

— 

— 
— 
—  $

— 
— 
— 

— 
— 
—  $

— 
— 
— 

— 
— 
— 
(238,760)

— 
(16,216,411)
— 

— 
(802,486)
— 

(16,216,411) $

(802,486) $

2,373 
(411,472)
58,050 

12,516 

277,201 
14,323 
640,528 

(97)
(327,370)
61,602 

11,317 
13,520 
399,500 

(1,303)
1,604,715 
53,508 

37,296 
(802,486)
745 
1,291,975 

See accompanying Notes to Consolidated Financial Statements.

F-7

 
 
Table of Contents

Agios Pharmaceuticals, Inc.

Consolidated Statements of Cash Flows

(In thousands) Years Ended December 31:
Operating activities
Net income (loss)
Less: Net income (loss) from discontinued operations
Net loss from continuing operations
Adjustments to reconcile net loss to net cash used in operating activities:

Depreciation and amortization
Stock-based compensation expense
Net amortization of premium (accretion of discount) on marketable securities
Loss on disposal of property and equipment
Non-cash operating lease expense
Changes in operating assets and liabilities:

Other receivables
Prepaid expenses and other current and non-current assets
Accounts payable
Accrued expenses
Operating lease liabilities

Net cash used in operating activities
Net cash used in operating activities - discontinued operations
Net cash used in operating activities

Investing activities
Purchases of marketable securities
Proceeds from maturities and sales of marketable securities
Purchases of property and equipment

Net cash (used in) provided by investing activities
Net cash provided by (used in) investing activities - discontinued operations
Net cash provided by investing activities

Financing activities
Payments on financing lease obligations
Purchase of treasury stock
Proceeds from public offering of common stock, net of reimbursements
Net proceeds from stock option exercises and employee stock purchase plan
Net cash (used in) provided by financing activities
Net cash provided by financing activities - discontinued operations
Net cash (used in) provided by financing activities

Net change in cash and cash equivalents
Cash and cash equivalents at beginning of the period
Cash and cash equivalents at end of the period

Supplemental disclosure of non-cash investing and financing transactions:

Additions to property and equipment in accounts payable and accrued expenses
Cash taxes paid
Operating lease liabilities arising from obtaining operating lease assets
Financing lease liabilities arising from obtaining financing lease assets

2021

2020

2019

$

1,604,715  $
1,961,225 
(356,510)

(327,370) $
1,935 
(329,305)

9,240 
53,508 
6,949 
12 
9,537 

(4,378)
(26,846)
1,863 
66 
(7,527)
(314,086)
(93,234)
(407,320)

(1,378,221)
829,804 
(5,741)
(554,158)
1,802,936 
1,248,778 

(578)
(802,486)
— 
37,296 
(765,768)
— 
(765,768)
75,690 
127,436 
203,126  $

1,678  $
16,078  $
—  $
511  $

$

$
$
$
$

9,790 
61,602 
3,022 
— 
8,982 

— 
(3)
3,330 
6,765 
(8,127)
(243,944)
(46,815)
(290,759)

(557,030)
647,685 
(14,106)
76,549 
(803)
75,746 

(336)
— 
— 
11,317 
10,981 
250,537 
261,518 
46,505 
80,931 
127,436  $

465  $
—  $
—  $
—  $

(411,472)
(110,064)
(301,408)

8,088 
58,050 
(3,195)
1,052 
8,532 

— 
(3,751)
4,162 
(825)
(6,861)
(236,156)
(134,466)
(370,622)

(488,566)
592,177 
(12,028)
91,583 
(143)
91,440 

(113)
— 
277,201 
12,523 
289,611 
— 
289,611 
10,429 
70,502 
80,931 

5,168 
— 
42,322 
1,052 

See accompanying Notes to Consolidated Financial Statements.

F-8

 
Table of Contents

Note 1. Nature of Business

References to Agios

Agios Pharmaceuticals, Inc.

Notes to Consolidated Financial Statements

Throughout  this  Annual  Report  on  Form  10-K,  “the  Company,”  “we,”  “us,”  and  “our,”  and  similar  expressions,  except  where  the  context  requires
otherwise,  refer  to  Agios  Pharmaceuticals,  Inc.  and  its  consolidated  subsidiaries,  and  “our  board  of  directors”  refers  to  the  board  of  directors  of  Agios
Pharmaceuticals, Inc.

Overview

We  are  a  biopharmaceutical  company  committed  to  transforming  patients’  lives  through  scientific  leadership  in  the  field  of  cellular  metabolism  and
adjacent areas of biology, with the goal of creating differentiated, small molecule medicines for genetically defined diseases. We take a systems biology
approach to deeply understand disease states, drive the discovery and validation of novel therapeutic targets, and define patient selection strategies, thereby
increasing the probability that our experimental medicines will have the desired therapeutic effect, while cultivating connections with patient communities,
healthcare  professionals,  partners  and  colleagues  to  discover,  develop  and  deliver  potential  therapies  for  genetically  defined  diseases,  or  GDDs. We  are
located in Cambridge, Massachusetts.

The  lead  product  candidate  in  our  GDD  portfolio,  PYRUKYND®  (mitapivat),  is  an  activator  of  both  wild-type  and  mutant  pyruvate  kinase,  or  PK,
enzymes for the potential treatment of hemolytic anemias. On February 17, 2022, the FDA approved PYRUKYND® for the treatment of hemolytic anemia
in  adults  with  pyruvate  kinase  (PK)  deficiency  in  the  United  States.  In  addition,  we  are  currently  evaluating  PYRUKYND®  for  the  treatment  of
thalassemia and sickle cell disease, or SCD, in clinical trials. We are also developing AG-946, a novel, next-generation PKR activator, for the potential
treatment of hemolytic anemias and other indications.

In addition to the aforementioned development programs, we foster a productive research engine and are seeking to advance multiple novel, investigational
therapies  in  clinical  and  preclinical  development  in  our  focus  area  of  GDDs,  based  on  our  scientific  leadership  in  the  field  of  cellular  metabolism  and
adjacent areas of biology.

We  are  subject  to  risks  common  to  companies  in  our  industry  including,  but  not  limited  to,  uncertainties  relating  to  conducting  clinical  research  and
development,  the  manufacture  and  supply  of  products  for  clinical  and  commercial  use,  obtaining  and  maintaining  regulatory  approvals  and  pricing  and
reimbursement  for  our  products,  market  acceptance,  managing  global  growth  and  operating  expenses,  availability  of  additional  capital,  competition,
obtaining  and  enforcing  patents,  stock  price  volatility,  dependence  on  collaborative  relationships  and  third-party  service  providers,  dependence  on  key
personnel, potential litigation, product liability claims and government investigations.

Sale of our Oncology Business to Servier

On March 31, 2021, we completed the sale of our oncology business to Servier Pharmaceuticals LLC, or Servier. The transaction included the sale of our
oncology business, including TIBSOVO®, our clinical-stage product candidates vorasidenib, AG-270 and AG-636, and our oncology research programs
for a payment of approximately $1.8 billion in cash at the closing, subject to certain adjustments, and a payment of $200 million in cash, if, prior to January
1, 2027, vorasidenib is granted new drug application, or NDA, approval from the U.S. Food and Drug Administration, or FDA, with an approved label that
permits vorasidenib’s use as a single agent for the adjuvant treatment of patients with Grade 2 glioma that have an isocitrate dehydrogenase 1 or 2 mutation
(and, to the extent required by such approval, the vorasidenib companion diagnostic test is granted an FDA premarket approval), as well as a royalty of 5%
of U.S. net sales of TIBSOVO® from the close of the transaction through loss of exclusivity, and a royalty of 15% of U.S. net sales of vorasidenib from the
first  commercial  sale  of  vorasidenib  through  loss  of  exclusivity.  Servier  also  acquired  our  co-commercialization  rights  for  Bristol  Myers  Squibb’s
IDHIFA®  and  the  right  to  receive  a  $25.0  million  potential  milestone  payment  under  our  prior  collaboration  agreement  with  Celgene  Corporation,  or
Celgene, and following the sale Servier is responsible for conducting certain clinical development activities within the IDHIFA® development program.

We recorded income from royalties of approximately $6.6 million on U.S. net sales of TIBSOVO® by Servier in the gain on sale of oncology business line
item within the condensed consolidated statements of operations, for the year ended December 31, 2021.

Reclassifications

Certain amounts in prior periods have been reclassified to reflect the impact of the discontinued operations treatment of the oncology business in order to
conform to the current period presentation.

F-9

Table of Contents

Liquidity

On March 31, 2021, we completed the sale of our oncology business to Servier, and received approximately $1.8 billion in cash at closing. In connection
with the sale, on March 25, 2021, we announced that our board of directors authorized the repurchase of up to $1.2 billion of our outstanding shares of
common stock, or the Repurchase Program, using the proceeds from the sale of our oncology business to Servier. On March 31, 2021, in connection with
the Repurchase Program, we entered into a definitive share repurchase agreement with Bristol-Myers Squibb Company, or BMS, to repurchase 7.1 million
shares of our common stock held by certain subsidiaries of BMS for an aggregate purchase price of $344.5 million, or $48.38 per share. This repurchase
was completed on April 5, 2021. Further, on April 2, 2021, in connection with the Repurchase Program, we entered into a Rule 10b5-1 repurchase plan
pursuant  to  which  we  may  repurchase  up  to  $600  million  of  shares  of  our  common  stock.  On  October  5,  2021,  we  terminated  our  Rule  10b5-1  share
repurchase program and on October 13, 2021 entered into a Rule 10b-18 repurchase plan that allows us to conduct open market repurchases over time up to
our remaining authorization. As of December 31, 2021, we have repurchased approximately 9.1 million shares of common stock for $458.0 million, or
$50.35 per share, under the Rule 10b5-1 repurchase plan. As of December 31, 2021, we have not repurchased any shares under the Rule 10b-18 repurchase
plan.  In  total,  as  of  December  31,  2021,  we  have  repurchased  16.2  million  shares  of  common  stock  for  $802.5  million,  or  $49.49  per  share,  under  the
Repurchase Program. We have paused our share repurchases for the foreseeable future.

On April 30, 2020, we entered into an at-the-market sales agreement, or the 2020 sales agreement, with Cowen & Company LLC, or Cowen, pursuant to
which we may offer and sell shares of our common stock having an aggregate offering price of up to $250.0 million through Cowen pursuant to a universal
shelf  registration  statement  on  Form  S-3  filed  with  the  SEC  on  April  30,  2020.  As  of  December  31,  2021,  $250.0  million  in  common  stock  remained
available for future issuance under the 2020 sales agreement.

As of December 31, 2021, we had cash, cash equivalents and marketable securities of $1,286.4 million. Although we have incurred recurring losses and
expect to continue to incur losses for the foreseeable future, we expect our cash, cash equivalents and marketable securities to be sufficient to fund current
operations for at least the next twelve months from the issuance of the financial statements. If we are unable to raise additional funds through equity or debt
financings, we may be required to delay, limit, reduce or terminate product development or future commercialization efforts or grant rights to develop and
market products or product candidates that we would otherwise prefer to develop and market ourselves.

Note 2. Summary of Significant Accounting Policies

Principles of consolidation

The  consolidated  financial  statements  include  our  accounts  and  the  accounts  of  our  wholly  owned  subsidiaries,  Agios  Securities  Corporation,  Agios
International Sarl (GmbH), Agios Germany GmbH, Agios Netherlands B.V., Agios Italy S.R.L., Agios France SARL, and Agios Limited. All intercompany
transactions have been eliminated in consolidation. The consolidated financial statements have been prepared in conformity with U.S. generally accepted
accounting principles, or U.S. GAAP.

Use of estimates

The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the reported amounts of
assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses
during the reporting period. On an ongoing basis we evaluate our estimates, judgments and methodologies. We base our estimates on historical experience
and on various other assumptions that we believe are reasonable, the results of which form the basis for making judgments about the carrying values of
assets, liabilities and equity and the amount of revenues and expenses. The full extent to which the COVID-19 pandemic will directly or indirectly impact
our business, results of operations and financial condition, including expenses, reserves and allowances, clinical trials, research and development costs and
employee-related  amounts,  will  depend  on  future  developments  that  are  highly  uncertain,  including  as  a  result  of  new  information  that  may  emerge
concerning  COVID-19  and  any  variant  strains  of  the  virus  and  the  actions  taken  to  contain  the  pandemic  or  treat  COVID-19,  as  well  as  the  economic
impact  on  local,  regional,  national  and  international  customers  and  markets.  We  have  made  estimates  of  the  impact  of  COVID-19  within  our  financial
statements and there may be changes to those estimates in future periods. Actual results may differ from these estimates.

Cash and cash equivalents

We consider highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. Cash equivalents are stated at fair
value.

F-10

Marketable securities

Marketable securities at December 31, 2021 and 2020 consisted of investments in U.S. Treasuries, government securities and corporate debt securities. We
determine  the  appropriate  classification  of  the  securities  at  the  time  they  are  acquired  and  evaluate  the  appropriateness  of  such  classifications  at  each
balance sheet date. We classify our marketable securities as available-for-sale pursuant to Accounting Standards Codification, or ASC, 320, Investments –
Debt  and  Equity  Securities.  Marketable  securities  are  recorded  at  fair  value.  Unrealized  gains  are  included  as  a  component  of  accumulated  other
comprehensive (loss) income in the consolidated balance sheets and statements of stockholders’ equity and a component of total comprehensive income
(loss)  in  the  consolidated  statements  of  comprehensive  income  (loss),  until  realized.  Realized  gains  and  losses  are  included  in  investment  income  on  a
specific-identification basis.

At December 31, 2021 and 2020, we held both current and non-current investments. Investments classified as current have maturities of less than one year.
Investments classified as non-current are those that: (i) have a maturity of one to two years, and (ii) we do not intend to liquidate within the next twelve
months, although these funds are available for use and therefore classified as available-for-sale.

We review marketable securities for impairment whenever the fair value of a marketable security is less than the amortized cost and evidence indicates that
a marketable security’s carrying amount is not recoverable. Unrealized losses are evaluated for impairment under ASC 326, Financial Instruments - Credit
Losses, to determine if the impairment is credit-related or noncredit-related. Credit-related impairment is recognized as an allowance on the balance sheet
with a corresponding adjustment to earnings, and noncredit-related impairment is recognized in other comprehensive income (loss), net of taxes. Evidence
considered in this assessment includes reasons for the impairment, compliance with our investment policy, the severity of the impairment, collectability of
the security, and any adverse conditions specifically related to the security, an industry, or geographic area.

Fair value measurements

We record cash equivalents and marketable securities at fair value. ASC 820, Fair Value Measurements and Disclosures, establishes a fair value hierarchy
for those instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and our own assumptions
(unobservable inputs). The hierarchy consists of three levels:

Level 1 – Unadjusted quoted prices in active markets for identical assets or liabilities.

Level  2  –  Quoted  prices  for  similar  assets  and  liabilities  in  active  markets,  quoted  prices  in  markets  that  are  not  active,  or  inputs  which  are
observable, either directly or indirectly, for substantially the full term of the asset or liability.

Level 3 – Unobservable inputs that reflect our own assumptions about the assumptions market participants would use in pricing the asset or liability
in which there is little, if any, market activity for the asset or liability at the measurement date.

Our  financial  assets,  which  include  cash  equivalents  and  marketable  securities,  have  been  initially  valued  at  the  transaction  price,  and  subsequently
revalued  at  the  end  of  each  reporting  period,  utilizing  third-party  pricing  services  or  other  observable  market  data.  The  pricing  services  utilize  industry
standard valuation models, including both income and market based approaches, and observable market inputs to determine value. After completing our
validation procedures, we did not adjust or override any fair value measurements provided by the pricing services as of December 31, 2021 or 2020. Fair
value information for these assets, including their classification in the fair value hierarchy is included in Note 4. Fair Value Measurements.

There have been no changes to the valuation methods during the years ended December 31, 2021 and 2020. We evaluate transfers between levels at the end
of each reporting period.

The carrying amounts of other receivable, prepaid expenses and other current assets, accounts payable, and accrued expenses approximate their fair values
due to their short-term maturities.

Concentrations of credit risk

Financial  instruments  which  potentially  subject  us  to  credit  risk  consist  primarily  of  cash,  cash  equivalents,  and  marketable  securities.  We  hold  these
investments in highly rated financial institutions, and, by policy, limit the amounts of credit exposure to any one financial institution. These amounts at
times may exceed federally insured limits. We have not experienced any credit losses in such accounts and do not believe we are exposed to any significant
credit risk on these funds. We have no off-balance sheet concentrations of credit risk, such as foreign currency exchange contracts, option contracts, or
other hedging arrangements.

F-11

Property and equipment

Property  and  equipment  consist  of  laboratory  equipment,  computer  equipment  and  software,  leasehold  improvements,  furniture  and  fixtures,  and  office
equipment. Costs of major additions and betterment are capitalized; maintenance and repairs, which do not improve or extend the life of the respective
assets, are charged to expense as incurred. Upon retirement or sale, the cost of the disposed asset and the related accumulated depreciation are removed
from the accounts and the resulting gain or loss is recognized.

Property and equipment is stated at cost, and depreciated using the straight-line method over the estimated useful lives of the respective assets:

Laboratory equipment
Computer equipment and software
Furniture and fixtures
Office equipment

Years
5
3
5
5

Leasehold improvements are amortized over the lesser of the remaining lease term or the estimated useful life of the improvement.

Impairment of long-lived assets

We periodically evaluate our long-lived assets for potential impairment in accordance with ASC 360, Property, Plant and Equipment. Potential impairment
is  assessed  when  there  is  evidence  that  events  or  changes  in  circumstances  indicate  that  the  carrying  amount  of  an  asset  may  not  be  recovered.
Recoverability of these assets is assessed based on the undiscounted expected future cash flows from the assets, considering a number of factors, including
past operating results, budgets and economic projections, market trends and product development cycles. If impairments are identified, assets are written
down to their estimated fair value. We did not recognize any impairment charges through December 31, 2021.

Leases

We determine if an arrangement is a lease at inception. An arrangement is determined to contain a lease if the contract conveys the right to control the use
of an identified property or equipment for a period of time in exchange for consideration. If we 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 multiple underlying assets
are identified, the lease consideration is allocated to the various components based on each of the component’s relative fair value.

Operating lease assets represent our right to use an underlying asset for the lease term and operating lease liabilities represent our obligation to make lease
payments arising from the leasing arrangement. Operating lease assets and operating lease liabilities are recognized at commencement date based on the
present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, in determining the operating lease liabilities, we
use an estimate of our incremental borrowing rate. The incremental borrowing rate is determined using two alternative credit scoring models to estimate
our  credit  rating,  adjusted  for  collateralization.  The  calculation  of  the  operating  lease  assets  includes  any  lease  payments  made  and  excludes  any  lease
incentives. Our lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option.

For  operating  leases,  we  record  operating  lease  assets  and  lease  liabilities  in  our  consolidated  balance  sheets.  Lease  expense  for  lease  payments  is
recognized on a straight-line basis over the lease term. Short-term leases, or leases that have a lease term of 12 months or less at commencement date, are
excluded from this treatment and are recognized on a straight-line basis over the term of the lease.

We have not entered into any material short-term leases or financing leases as of December 31, 2021.

Research and development costs

Research  and  development  costs,  including  those  accrued  as  of  each  balance  sheet  date,  are  expensed  as  incurred.  These  costs  include  salaries  and
personnel-related  costs,  consulting  fees,  fees  paid  for  contract  research  services,  fees  paid  to  contract  research  organizations,  or  CROs,  and  other  third
parties in connection with clinical trials and preclinical development activities, fees paid to investigative sites in connection with clinical studies, the costs
associated with the product manufacturing, development, and distribution of clinical supplies, the costs of laboratory equipment and facilities, and other
external costs.

F-12

Nonrefundable  advance  payments  for  goods  or  services  to  be  received  in  the  future  for  use  in  research  and  development  activities  are  deferred  and
capitalized.  Additionally,  there  may  be  instances  in  which  payments  made  to  our  vendors  will  exceed  the  level  of  services  provided,  and  result  in  a
prepayment  of  the  research  and  development  expense.  The  capitalized  amounts  are  expensed  as  the  related  goods  are  delivered  or  the  services  are
performed. We estimate the time period over which services will be performed and the level of effort to be expended in each period. If the actual timing of
the performance of services or the level of effort varies from our estimate, we adjust the accrual or prepaid accordingly.

Stock-based compensation

We account for stock-based compensation awards in accordance with ASC 718, Compensation –Stock Compensation, or ASC 718. For stock-based awards
granted to employees and to members of the board of directors for their services and for participation in our employee stock purchase plan, we primarily
estimate the grant date fair value of each option award using the Black-Scholes option-pricing model. The use of the Black-Scholes option-pricing model
requires us to make assumptions with respect to the expected term of the option, the expected volatility of the common stock consistent with the expected
life of the option, risk-free interest rates and expected dividend yields of the common stock. For awards subject to service-based vesting conditions, we
recognize stock-based compensation expense equal to the grant date fair value of stock options on a straight-line basis over the requisite service period. For
awards  subject  to  both  performance  and  service-based  vesting  conditions,  we  recognize  stock-based  compensation  expense  over  the  remaining  service
period if the performance condition is considered probable of achievement using management’s best estimates.

Income taxes

Income taxes are recorded in accordance with ASC 740, Accounting for Income Taxes, or ASC 740, which provides for deferred taxes using an asset and
liability  approach.  We  recognize  deferred  tax  assets  and  liabilities  for  the  expected  future  tax  consequences  of  events  that  have  been  included  in  our
financial statements or tax returns. We determine our deferred tax assets and liabilities based on differences between the financial reporting and tax bases of
assets and liabilities, which are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. Valuation
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.

We also account for uncertain tax positions in accordance with the provisions of ASC 740. When uncertain tax positions exist, we recognize the tax benefit
of tax positions to the extent that the benefit will more likely than not be realized. The determination as to whether the tax benefit will more likely than not
be realized is based upon the technical merits of the tax position as well as consideration of the available facts and circumstances.

Comprehensive income (loss)

Comprehensive  income  (loss)  is  defined  as  the  change  in  equity  of  a  business  enterprise  during  a  period  from  transactions,  and  other  events  and
circumstances, and currently consists of net loss and unrealized gains and losses on available-for-sale securities. Accumulated other comprehensive (loss)
income consists entirely of unrealized gains and losses from available-for-sale securities as of December 31, 2021 and 2020.

Net income (loss) per share

Basic  net  income  (loss)  per  share  is  calculated  by  dividing  net  income  (loss)  by  the  weighted-average  shares  outstanding  during  the  period,  without
consideration for common stock equivalents. Diluted net income (loss) per share is calculated by adjusting weighted-average shares outstanding for the
dilutive  effect  of  common  stock  equivalents  outstanding  for  the  period,  determined  using  the  treasury-stock  method.  For  purposes  of  the  dilutive  net
income (loss) per share calculation, stock options, restricted stock units, or RSUs, performance-based stock units, or PSUs, and market-based stock units,
or  MSUs,  for  which  the  performance  vesting  conditions  have  been  met,  and  employee  stock  purchase  plan  shares  are  considered  to  be  common  stock
equivalents but are excluded from the calculation of diluted net income (loss) per share as their effect would be anti-dilutive.

We  utilize  the  control  number  concept  in  the  computation  of  diluted  earnings  per  share  to  determine  whether  potential  common  stock  equivalents  are
dilutive. The control number used is loss from continuing operations. The control number concept requires that the same number of potentially dilutive
securities applied in computing diluted earnings per share from continuing operations be applied to all other categories of income or loss, regardless of their
anti-dilutive effect on such categories. Since we had a net loss for continuing operations for all periods presented, no dilutive effect has been recognized in
the calculation of income (loss) from discontinued operations per share or net income (loss) per share.

Segment and geographic information

Operating  segments  are  identified  as  components  of  an  enterprise  about  which  separate  discrete  financial  information  is  available  for  evaluation  by  the
chief operating decision maker, or decision-making group, in making decisions on how to

F-13

allocate resources and assess performance. Our chief operating decision maker is the chief executive officer. Our chief operating decision maker and we
view our operations and manage our business as one operating segment.

Discontinued Operations

We  accounted  for  the  sale  of  our  oncology  business  in  accordance  with  Accounting  Standards  Codification,  ASC,  205  Discontinued  Operations  and
Accounting Standards Update, ASU, No. 2014-08, Reporting of Discontinued Operations and Disclosures of Disposals of Components of an Entity. We
followed the held-for-sale criteria as defined in ASC 360 and ASC 205. ASC 205 requires that a component of an entity that has been disposed of or is
classified as held for sale and has operations and cash flows that can be clearly distinguished from the rest of the entity be reported as assets held for sale
and discontinued operations. In the period a component of an entity has been disposed of or classified as held for sale, the results of operations for the
periods  presented  are  reclassified  into  separate  line  items  in  the  consolidated  statements  of  operations.  Assets  and  liabilities  are  also  reclassified  into
separate line items on the related consolidated balance sheets for the periods presented. The statements of cash flows for the periods presented are also
reclassified to reflect the results of discontinued operations as separate line items. ASU 2014-08 requires that only a disposal of a component of an entity,
or a group of components of an entity, that represents a strategic shift that has, or will have, a major effect on the reporting entity’s operations and financial
results be reported in the financial statements as discontinued operations. ASU 2014-08 also provides guidance on the financial statement presentations and
disclosures of discontinued operations.

Due to the sale of the oncology business during the first quarter of 2021, in accordance with ASC 205, Discontinued Operations, we have classified the
results of the oncology business as discontinued operations in our consolidated statements of operations and cash flows for all periods presented, see Note
3,  Discontinued  Operations.  All  assets  and  liabilities  associated  with  our  oncology  business  were  therefore  classified  as  assets  and  liabilities  of
discontinued  operations  in  our  consolidated  balance  sheets  for  the  periods  presented.  All  amounts  included  in  the  notes  to  the  consolidated  financial
statements relate to continuing operations unless otherwise noted.

Treasury Stock

Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as treasury stock.

Recent accounting pronouncements

Leases

In February 2016, the Financial Accounting Standard Board, or FASB issued Accounting Standards Update, or ASU, No. 2016-02, Leases  (Topic  842),
which  was  codified  as  ASC  842,  Leases,  and  amended  through  subsequent  ASUs.  We  adopted  ASC  842  effective  January  1,  2019  using  the  optional
transition method provided for under ASU 2018-11, Leases (Topic 842): Targeted Improvements, whereby we applied the new lease requirements through a
cumulative-effect adjustment, which after completing our implementation analysis, resulted in no material adjustment to our January 1, 2019 beginning
accumulated deficit balance. We also elected the package of practical expedients provided for under ASU 2018-11, which allows us not to reassess whether
contracts are or contain leases, lease classification, and whether initial direct costs qualify for capitalization. Additionally, as an accounting policy, for our
building leases, we chose not to separate the non-lease components from the lease components and, instead, accounted for each non-lease component and
lease component as a single component.

We  completed  our  assessment  over  the  impact  of  the  standard  and  determined  that  the  only  material  leases  that  we  hold  are  our  building  leases.  Upon
adoption of the standard on January 1, 2019, we recorded operating right of use assets of $59.9 million and operating lease liabilities of $77.3 million on
our consolidated balance sheets.

Other recent accounting pronouncements

In  June  2018,  the  FASB  issued  ASU  2018-07  –  Compensation-Stock  Compensation  (Topic  718)-Improvements  to  Nonemployee  Share-Based  Payment
Accounting.  ASU  2018-07  simplifies  the  accounting  for  share-based  payments  to  nonemployees  by  aligning  it  with  the  accounting  for  share-based
payments to employees, with certain exceptions. ASU 2018-07 is effective for fiscal years beginning after December 15, 2018. The Company adopted the
new standard as of January 1, 2019. There was no material impact to the Company’s consolidated financial position, results of operation, or cash flows.

In December 2019, the FASB issued ASU 2019-12 – Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes, as part of its initiative to
reduce complexity in the accounting standards. The amendments in ASU 2019-12 eliminate certain exceptions related to the approach for intraperiod tax
allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences.
ASU 2019-12 also clarifies and simplifies other aspects of the accounting for income taxes. The amendments in ASU 2019-12 are effective for the fiscal
years beginning after December 15, 2020. Early adoption is permitted, including adoption in any interim period. The Company has early

F-14

adopted this amendment as of January 1, 2019. There was no material impact to the Company’s consolidated financial position, results of operation, or cash
flows.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), which introduces new guidance for the accounting for
credit losses on instruments within its scope. The new guidance introduces an approach based on expected losses to estimate credit losses on certain types
of financial instruments. Credit losses relating to available-for-sale debt securities will also be recorded through an allowance for credit losses rather than as
a reduction in the amortized cost basis of the securities. The guidance is effective for fiscal years beginning after December 31, 2019, including interim
periods  within  those  years.  The  Company  adopted  this  amendment  as  of  January  1,  2020,  which  eliminated  the  concept  of  other-than-temporary
impairments and required credit losses on debt securities to be recorded through an allowance for credit losses instead of as a reduction in the amortized
cost basis of the securities. Application of the amendments is through a cumulative-effect adjustment to retained earnings as of the effective date. There
was no material impact to the Company’s consolidated financial position, results of operation, or cash flows.

Other accounting standards that have been issued by the FASB or other standards-setting bodies that do not require adoption until a future date are not
expected to have a material impact on our financial statements upon adoption.

Subsequent events

We considered events or transactions occurring after the balance sheet date, but prior to the issuance of the consolidated financial statements, for potential
recognition  or  disclosure  in  our  consolidated  financial  statements.  All  significant  subsequent  events  have  been  properly  disclosed  in  the  consolidated
financial statements.

Note 3. Discontinued Operations

On March 31, 2021, we completed the sale of our oncology business to Servier. We have determined the sale of the oncology business represents a strategic
shift that had a major effect on our business and therefore met the criteria for classification as discontinued operations at March 31, 2021. Accordingly, the
oncology business is reported as discontinued operations in accordance with ASC 205-20, Discontinued Operations. The related assets and liabilities of the
oncology business are classified as assets and liabilities of discontinued operations in the consolidated balance sheets and the results of operations from the
oncology business as discontinued operations in the consolidated statements of operations. Applicable amounts in prior years have been recast to conform
to this discontinued operations presentation. We recognized a gain on the sale of the oncology business upon closing.

The following table presents the assets and liabilities of the discontinued operations as of December 31, 2020:

(in thousands)
Assets
Current assets:

Accounts receivable, net
Collaboration receivable – related party
Collaboration receivable – other
Inventory
Prepaid expenses and other current assets

Total current assets of discontinued operations

Other non-current assets

Total assets of discontinued operations

Liabilities
Current liabilities:

Accounts payable
Accrued expenses

Total current liabilities of discontinued operations

Liability related to the sale of future revenue, net of debt issuance costs

Total liabilities of discontinued operations

F-15

December 31, 2020

$

$

$

$

21,328 
2,123 
1,948 
14,698 
7,762 
47,859 
2,601 
50,460 

9,120 
29,339 
38,459 
261,269 
299,728 

The following table presents the net liabilities transferred for the sale of the oncology business at March 31, 2021:

(in thousands)
Assets
Current assets:

Accounts receivable, net
Collaboration receivable – related party
Collaboration receivable – other
Inventory
Prepaid expenses and other current assets

Total current assets of discontinued operations

Other non-current assets

Total assets of discontinued operations

Liabilities
Current liabilities:

Accounts payable
Accrued expenses

Total current liabilities of discontinued operations

Liability related to the sale of future revenue, net of debt issuance costs

Total liabilities of discontinued operations

Net liabilities distributed to Servier

The following table presents the gain on the sale for the year ended December 31, 2021:

(in thousands)
Cash proceeds
Less: transaction and insurance costs
Plus: net liabilities distributed, including working capital adjustment
Gain on sale, pre-tax
Income tax expense
Gain on sale, net of tax

As of December 31, 2021, there were no assets or liabilities classified as discontinued operations.

March 31, 2021

25,386 
2,253 
2,438 
16,190 
7,125 
53,392 
2,234 
55,626 

4,245 
30,288 
34,533 
264,281 
298,814 
(243,188)

December 31, 2021

1,802,936 
(53,573)
239,770 
1,989,133 
(12,799)
1,976,334 

$

$

$

$

$

$

F-16

The following table presents the financial results of the discontinued operations:

(in thousands)
Revenues:

Product revenue, net
Collaboration revenue – related party
Collaboration revenue – other
Royalty revenue – related party

Total revenue

Cost and expenses:

Cost of sales
Research and development
Selling, general and administrative
Total cost and expenses
(Loss) income from discontinued operations

Non-cash interest expense for the sale of future revenue
Gain on the sale of the oncology business

(Loss) income from discontinued operations, pre-tax

Income tax expense

Net (loss) income from discontinued operations

2021

2020

2019

36,909  $
1,350 
491 
2,659 
41,409 

706 
41,564 
8,551 
50,821 
(9,412)
(5,697)
1,989,133 
1,974,024 
(12,799)
1,961,225  $

121,089  $
68,274 
3,571 
10,262 
203,196 

2,805 
146,659 
33,965 
183,429 
19,767 
(17,832)
— 
1,935 
— 
1,935  $

59,851 
39,257 
8,262 
10,542 
117,912 

1,317 
196,632 
30,027 
227,976 
(110,064)
— 

(110,064)
— 
(110,064)

$

$

In  accordance  with  ASC  205-20,  only  expenses  specifically  identifiable  and  related  to  a  business  to  be  disposed  may  be  presented  in  discontinued
operations. As such, the research and development, marketing, selling and general and administrative expenses in discontinued operations include corporate
costs incurred directly to solely support our oncology business.

We have also entered into a Transition Services Agreement with Servier, through which we will provide transitional services related to discovery, clinical
development, technical operations, commercial and general and administrative related activities for periods ranging from one month to approximately one
year through March 31, 2022.

The  milestone  payment  for  approval  of  vorasidenib  and  royalty  payments  related  to  vorasidenib  and  TIBSOVO®  represent  contingent  consideration.
Contingent consideration has been accounted for as a gain contingency in accordance with ASC 450, Contingencies, and will be recognized in earnings in
the period when realizable.

Note 4. Fair Value Measurements

The following table summarizes our cash equivalents and marketable securities measured at fair value and by level (as described in Note 2. Summary of
Significant Accounting Policies) on a recurring basis as of December 31, 2021:

(In thousands)
Cash equivalents
Total cash equivalents

Marketable securities:
U.S. Treasuries
Government securities
Corporate debt securities

Total marketable securities
Total cash equivalents and marketable securities

Level 1

Level 2

Level 3

Total

156,229  $
156,229 

21,524  $
21,524 

—  $
— 

177,753 
177,753 

— 
— 
— 
— 
156,229  $

309,658 
166,104 
607,505 
1,083,267 
1,104,791  $

— 
— 
— 
— 
—  $

309,658 
166,104 
607,505 
1,083,267 
1,261,020 

$

$

There were no transfers between Level 1 and Level 2 and we had no financial assets or liabilities that were classified as Level 3 at any point during the year
ended December 31, 2021.

F-17

Note 5. Marketable Securities

Marketable securities at December 31, 2021 consisted of the following:

(In thousands)
Current:

U.S. Treasuries
Government securities
Corporate debt securities

Total Current

Non-current:

U.S. Treasuries
Government securities
Corporate debt securities

Total Non-current
Total marketable securities

Marketable securities at December 31, 2020 consisted of the following:

(In thousands)
Current:

U.S. Treasuries
Government securities
Corporate debt securities

Total Current

Non-current:

U.S. Treasuries
Government securities
Corporate debt securities

Total Non-current
Total marketable securities

Amortized
Cost

Unrealized
Gains

Unrealized
Losses

Fair
Value

269,109  $
17,764 
530,490 
817,363 

40,607 
148,820 
77,675 
267,102 
1,084,465  $

—  $
1 
3 
4 

— 
— 
— 
— 

4  $

(36) $
(10)
(429)
(475)

269,073 
17,755 
530,064 
816,892 

(23)
(470)
(234)
(727)
(1,202) $

40,584 
148,350 
77,441 
266,375 
1,083,267 

Amortized
Cost

Unrealized
Gains

Unrealized
Losses

Fair
Value

113,559  $
108,263 
223,461 
445,283 

15,147 
26,831 
55,735 
97,713 
542,996  $

134  $
37 
140 
311 

— 
8 
2 
10 
321  $

(21) $
(8)
(72)
(101)

(10)
— 
(105)
(115)
(216) $

113,672 
108,292 
223,529 
445,493 

15,137 
26,839 
55,632 
97,608 
543,101 

$

$

$

$

There were no material realized gains or losses on marketable securities for the years ended December 31, 2021 and 2020.

At December 31, 2021 and 2020, we held 294 and 87 debt securities, respectfully, that were in an unrealized loss position for less than one year. We did not
record an allowance for credit losses as of December 31, 2021 and December 31, 2020 related to these securities. The aggregate fair value of debt securities
in an unrealized loss position at December 31, 2021 and 2020 was $950.5 million and $299.0 million, respectively. There were no individual securities that
were  in  a  significant  unrealized  loss  position  as  of  December  31,  2021  and  2020.  We  regularly  review  the  securities  in  an  unrealized  loss  position  and
evaluate  the  current  expected  credit  loss  by  considering  factors  such  as  historical  experience,  market  data,  issuer-specific  factors,  and  current  economic
conditions. We do not consider these marketable securities to be impaired as of December 31, 2021 and 2020.

F-18

Note 6. Property and Equipment, net

Property and equipment, net consisted of the following at December 31:

(In thousands)
Laboratory equipment
Computer equipment and software
Leasehold improvements
Furniture and fixtures
Office equipment
Construction in progress
Total property and equipment
Less: accumulated depreciation
Total property and equipment, net

2021

2020

22,165  $
6,913 
32,726 
3,035 
1,690 
7,368 
73,897 
(44,974)
28,923  $

23,858 
6,945 
32,568 
3,035 
1,651 
4,111 
72,168 
(41,353)
30,815 

$

$

Depreciation expense for the years ended December 31, 2021, 2020 and 2019 was $8.8 million, $9.4 million and $8.0 million, respectively.

Note 7. Leases

Our  building  leases  are  comprised  of  office  and  laboratory  space  under  non-cancelable  operating  leases.  These  lease  agreements  have  remaining  lease
terms of six years and contain various clauses for renewal at our option. The renewal options were not included in the calculation of the operating lease
assets and the operating lease liabilities as the renewal option is not reasonably certain of being exercised. The lease agreements do not contain residual
value guarantees.

On  April  11,  2019,  we  entered  into  an  agreement  to  lease  approximately  13,000  square  feet  of  office  space  located  at  38  Sidney  Street,  Cambridge,
Massachusetts, or the 38 Sidney Lease, with Thirty-Eight Sidney Street, LLC. The initial term of the 38 Sidney Lease commenced on May 1, 2019 and
expires on February 29, 2028. At the end of the lease term, we have the option to extend the 38 Sidney Lease for two consecutive terms of five years at fair
market rent at the time of the extension. The 38 Sidney Lease provides us with the right to lease additional space within the 38 Sidney Street building and
also includes rent escalation clauses and a tenant improvement allowance of $1.0 million.

In connection with the 38 Sidney Lease, we also amended our existing building leases at 88 Sidney Street, Cambridge, Massachusetts and at 64 Sidney
Street, Cambridge, Massachusetts to extend the initial terms of those leases by approximately three years through February 29, 2028. The amendments also
provide us with the right to lease additional space at the 64 Sidney Street building. Our existing extension options for the 88 Sidney Street building and 64
Sidney Street building continue as set forth in the existing leases for those buildings.

The components of lease expense and other information related to leases were as follows:

(In millions)
Operating Lease Costs
Cash paid for amounts included in the measurement of operating lease liabilities

2021

2020

2019

$

15.2  $
14.4 

15.2  $
14.4 

15.1 
12.8 

We have not entered into any material short-term leases or financing leases as of December 31, 2021.

In arriving at the operating lease liabilities as of December 31, 2021, we applied the weighted-average incremental borrowing rate of 5.7% from inception
over a weighted-average remaining lease term of 6.2 years. In arriving at the operating lease liabilities as of December 31, 2020, we applied the weighted-
average incremental borrowing rate of 5.7% over a weighted-average remaining lease term of 7.2 years.

F-19

As of December 31, 2021, undiscounted minimum rental commitments under non-cancelable leases, for each of the next five years and total thereafter,
were as follows:

(In thousands)
2022
2023
2024
2025
2026
Thereafter
Undiscounted minimum rental commitments
Interest
Total operating lease liabilities

$

$

15,560 
18,126 
18,660 
19,507 
20,151 
24,234 
116,238 
(19,751)
96,487 

We provided our landlord a standby letter of credit of $2.9 million as security for our leases. We are not required to maintain any cash collateral for the
standby letter of credit.

In August 2021, we entered into a long-term sublease agreement for 13,000 square feet of the office space at 38 Sidney Street Cambridge, Massachusetts.
The term of the lease runs until December 2024. We recorded operating sublease income of $0.5 million for the year ended December 31, 2021 in other
income, net in the consolidated statements of operations.

As of December 31, 2021, the future minimum lease payments to be received under the long-term sublease agreement were as follows:

(In thousands)
2022
2023
2024
Total

Note 8. Accrued Expenses

Accrued expenses consisted of the following at December 31:

(In thousands)
Accrued compensation
Accrued research and development costs
Accrued professional fees
Accrued other
Total accrued expenses

Note 9. Commitments and Contingent Liabilities

Manufacturing Commitments

1,118 
1,152 
1,186 
3,456 

$

2021

2020

$

$

19,818  $
5,980 
2,335 
3,834 
31,967  $

20,345 
5,444 
2,897 
2,115 
30,801 

We are party to various agreements with contract manufacturing organizations that we are not contractually able to terminate for convenience and avoid
any and all future obligations to the vendors. Under such agreements, we are obligated to make certain minimum payments, with the exact amounts in the
event of termination to be based on the timing of the termination and the exact terms of the agreement.

F-20

Legal Contingencies

From time to time, we may be involved in disputes and legal proceedings in the ordinary course of business. These proceedings may include allegations of
infringement of intellectual property, employment or other matters. We do not have any ongoing legal proceedings that, based on our estimates, could have
a material effect on our consolidated financial statements.

Note 10. Common Stock

We are authorized to issue 125,000,000 shares of our common stock. Holders of common stock are entitled to one vote per share. Additionally, holders of
common  stock  are  entitled  to  receive  dividends,  if  and  when  declared  by  our  board  of  directors,  and  to  share  ratably  in  our  assets  legally  available  for
distribution to our shareholders in the event of liquidation.

Note 11. Share-Based Payments

Stock incentive plans

In June 2013, our Board of Directors adopted and, in July 2013 our stockholders approved, the 2013 Stock Incentive Plan, or the 2013 Plan. The 2013 Plan
became effective upon the closing of our initial public offering and provides for the grant of incentive stock options, non-qualified stock options, stock
appreciation  rights,  restricted  stock  awards,  restricted  stock  units,  or  RSUs,  performance-based  share  units,  or  PSUs,  and  other  stock-based  awards  to
employees,  non-employees  and  non-employee  directors.  Following  the  adoption  of  the  2013  Plan,  we  granted  no  further  stock  options  or  other  awards
under the 2007 Stock Incentive Plan, or the 2007 Plan. Any options or awards outstanding under the 2007 Plan at the time of adoption of the 2013 Plan
remain outstanding and effective. As of December 31, 2021, the total number of shares reserved under the 2007 Plan and the 2013 Plan was 11,422,409,
and we had 5,343,905 shares available for future issuance under the 2013 Plan.

The 2013 Plan provides for an annual increase, to be added on the first day of each fiscal year, beginning with the fiscal year ending December 31, 2014
and  continuing  until  the  expiration  of  the  2013  Plan,  equal  to  the  lesser  of  (i)  2,000,000  shares  of  common  stock,  (ii)  4%  of  the  outstanding  shares  of
common stock on such date or (iii) an amount determined by our Board of Directors. On January 1, 2022, the annual increase for the 2013 Plan resulted in
an additional 2,000,000 shares authorized for issuance.

Stock options

The following table summarizes the stock option activity of all stock incentive plans for the year ended December 31, 2021:

Outstanding at December 31, 2020

Granted
Exercised
Forfeited/Expired

Outstanding at December 31, 2021
Exercisable at December 31, 2021
Vested and expected to vest at December 31, 2021

Number of
Stock
Options

6,143,046  $
1,073,989 
(758,685)
(1,659,524)
4,798,826  $
3,367,239  $
4,798,826  $

Weighted-
Average
Exercise
Price

58.46 
55.54 
44.73 
62.70 
58.51 
60.52 
58.51 

Weighted-
Average
Remaining
Contractual
Term
(in years)

Aggregate
Intrinsic
Value (in
thousands)

6.68 $

13,714 

6.24 $
5.25 $
6.24 $

4,697 
4,697 
4,697 

The weighted-average grant date fair value of options granted was $31.20, $32.10 and $36.44 during the years ended December 31, 2021, 2020 and 2019,
respectively. The total intrinsic value of options exercised was $8.5 million, $10.4 million and $6.4 million during the years ended December 31, 2021,
2020 and 2019, respectively.

At  December  31,  2021,  the  total  unrecognized  compensation  expense  related  to  unvested  stock  option  awards  was  $39.8  million,  which  we  expect  to
recognize over a weighted-average period of approximately 2.33 years.

F-21

Restricted stock units

Upon vesting, each RSU entitles the holder to receive a specified number of shares of our common stock. The following table presents RSU activity for the
year ended December 31, 2021:

Unvested shares at December 31, 2020
Granted
Vested
Forfeited
Unvested shares at December 31, 2021

Number of
Stock Units

Weighted-Average
Grant Date
Fair Value

1,284,378  $
835,698 
(403,138)
(714,014)
1,002,924  $

50.78 
55.49 
56.90 
51.81 
51.51 

As of December 31, 2021, there was approximately $29.5 million of total unrecognized compensation expense related to RSUs, which we expect to be
recognized over a weighted-average period of 1.74 years.

Performance-based stock units

At the achievement of the performance-based and service-based vesting criteria, each PSU entitles the holder to receive a specified number of shares of our
common stock. The following table presents PSU activity for the year ended December 31, 2021:

Unvested shares at December 31, 2020
Granted
Vested
Forfeited
Unvested shares at December 31, 2021

Number of
Stock Units

Weighted-Average
Grant Date
Fair Value

142,229  $
141,000 
— 
(49,170)
234,059  $

54.28 
54.20 
— 
54.08 
54.28 

Stock-based  compensation  expense  associated  with  these  PSUs  is  recognized  if  the  underlying  performance  condition  is  considered  probable  of
achievement using our management’s best estimates. As of December 31, 2021, there was no unrecognized compensation expense related to PSUs with
performance-based vesting criteria that are considered probable of achievement that we expect to recognize. There is $12.7 million of total unrecognized
compensation expense related to PSUs with performance-based vesting criteria that are considered not probable of achievement.

Market-based stock units

The Company has issued certain equity awards that contain market based vesting conditions, in which shares of stock are earned at vesting based on stock
price performance. The fair value of MSUs are estimated using a Monte Carlo simulation model. Assumptions and estimates utilized in the model include
the risk-free interest rate, dividend yield, expected stock volatility and the estimated period to achievement of the market condition. The following table
presents MSU activity for the year ended December 31, 2021:

Unvested shares at December 31, 2020
Granted
Unvested shares at December 31, 2021

Number of
Stock Units

Weighted-Average
Grant Date
Fair Value

42,695  $
— 
42,695  $

41.50 
— 
41.50 

As of December 31, 2021, there was no remaining unrecognized compensation expense related to MSUs.

2013 Employee Stock Purchase Plan

In June 2013, our Board of Directors adopted, and in July 2013 our stockholders approved, the 2013 Employee Stock Purchase Plan, or the 2013 ESPP. On
January  1,  2022,  the  annual  increase  for  the  2013  ESPP  resulted  in  an  additional  509,091  shares  authorized  for  issuance.  We  issued  94,888  shares  and
120,293 shares during the years ended December 31, 2021 and 2020, respectively, under the 2013 ESPP. The 2013 ESPP provides participating employees
with the opportunity to purchase up to an

F-22

aggregate of 1,345,454 shares of our common stock. As of December 31, 2021, we had 885,556 shares available for future issuance under the 2013 ESPP.

Stock-based compensation expense

During  the  years  ended  December  31,  2021,  2020  and  2019,  we  recorded  stock-based  compensation  expense  for  employee  and  non-employee  stock
options,  RSUs,  PSUs,  ESPP  shares  and  other  stock-based  awards.  Stock-based  compensation  expense  by  award  type  included  within  the  consolidated
statements of operations is as follows:

(In thousands)
Stock options
Restricted stock units
Performance-based stock units
Employee Stock Purchase Plan
Other stock awards
Total stock-based compensation expense

2021

2020

2019

$

$

30,985  $
21,510 
— 
1,013 
— 
53,508  $

37,705  $
19,893 
1,760 
1,463 
781 
61,602  $

Expenses related to equity-based awards were allocated as follows in the consolidated statements of operations:

(In thousands)
Research and development expense
Selling, general and administrative expense
Total stock-based compensation expense

2021

2020

2019

$

$

24,527  $
28,981 
53,508  $

27,119  $
34,483 
61,602  $

38,650 
14,733 
2,239 
1,437 
991 
58,050 

27,287 
30,763 
58,050 

No related tax benefits were recognized for the years ended December 31, 2021, 2020 and 2019.

The fair value of each stock option granted to employees and nonemployees is estimated on the date of grant using the Black-Scholes option-pricing model.
The following table summarizes the weighted average assumptions used in calculating the grant date fair value of the awards:

Risk-free interest rate
Expected dividend yield
Expected term (in years)
Expected volatility

Expected term

2021

2020

2019

.72 %
— 
6.05
61.72 %

1.24 %
— 
6.05
73.80 %

2.32 %
— 
6.06
76.19 %

We use the “simplified method” as prescribed by the Securities and Exchange Commission Staff Accounting Bulletin No. 107, Share Based Payments, to
estimate the expected term of stock option grants. Under this approach, the weighted-average expected life is presumed to be the average of the contractual
term of ten years and the weighted-average vesting term of the stock options, taking into consideration multiple vesting tranches. We utilize this method
due to lack of historical data and the plain-vanilla nature of our share-based awards.

Volatility

The expected volatility has been determined using Agios' historical volatilities for a period equal to the expected term of the option grant.

Risk-free rate

The risk-free rate is based on the yield curve of U.S. Treasury securities with periods commensurate with the expected term of the options being valued.

Dividends

We have never paid, and do not anticipate paying, any cash dividends in the foreseeable future, and, therefore, use an expected dividend yield of zero in the
option-pricing model.

Forfeitures

We account for forfeitures as they occur and, therefore, do not estimate forfeitures.

F-23

Note 12. Income Taxes

The domestic and foreign components of loss from continuing operations before income taxes are as follows:

(In thousands)
Domestic
Foreign
Total

2021

2020

2019

$

$

(356,665) $
155 
(356,510) $

(330,669) $
1,364 
(329,305) $

(322,471)
21,063 
(301,408)

We did not have any material provision for income taxes for the years ended December 31, 2021, 2020 and 2019.

A reconciliation of the expected income tax benefit (expense) computed using the federal statutory income tax rate to our effective income tax rate is as
follows for the years ended December 31, 2021, 2020 and 2019:

Income tax benefit computed at federal statutory tax rate
State taxes, net of federal benefit
Change in valuation allowance
General business credits and other credits
Permanent differences and other adjustments
Stock based compensation
Foreign rate differential
Total

2021

2020

2019

21.0 %
2.6 %
(24.5)%
5.3 %
(3.9)%
(0.5)%
— %
— %

21.0 %
2.5 %
(28.2)%
7.0 %
(1.6)%
(0.7)%
— %
— %

21.0 %
3.9 %
(29.5)%
6.9 %
(1.9)%
(0.9)%
0.5 %
— %

Deferred  income  taxes  reflect  the  net  tax  effects  of  temporary  differences  between  the  carrying  amount  of  assets  and  liabilities  for  financial  reporting
purposes and the amounts used for income tax purposes. Significant components of our deferred tax assets and liabilities for the years ended December 31,
2021 and 2020 are as follows:

(In thousands)
Deferred tax assets:

Net operating loss carryforwards
Tax credit carryforwards
Purchased intangible assets
Stock-based compensation
Operating lease liability
Non-deductible accruals and reserves, including inventory
RPI Royalty Sale
Other

Total deferred tax assets
Depreciation and amortization
Operating lease right of use asset
Less: valuation allowance
Net deferred taxes

2021

2020

39,186  $
152,128 
12,150 
27,217 
22,963 
4,033 
— 
— 
257,677 
(3,168)
(18,031)
(236,478)

—  $

310,841 
163,589 
13,543 
34,284 
25,085 
12,730 
58,048 
1,230 
619,350 
(4,002)
(20,596)
(594,752)
— 

$

$

On  March  27,  2020,  the  Coronavirus  Aid,  Relief,  and  Economic  Security  (CARES)  Act  was  signed  into  law  making  several  changes  to  the  Internal
Revenue Code. The changes include, but are not limited to: increasing the limitation on the amount of deductible interest expense, allowing companies to
carryback certain net operating losses, and increasing the amount of net operating loss carryforwards that corporations can use to offset taxable income.
The tax law changes in the Act did not have a material impact on the Company’s income tax provision.

As of December 31, 2021, we had net operating loss carryforwards, or NOLs, available to reduce federal, state and foreign income taxes of approximately
$22.1 million, $420.0 million and $65.2 million, respectively. The federal NOLs have an indefinite life, however, if not utilized, the state and foreign NOLs
begin to expire in 2035 and 2024, respectively. At December 31, 2021, we also had available research and development tax credits for federal and state
income tax purposes of

F-24

approximately $13.5 million and $24.0 million, respectively. If not utilized, the credits begin to expire in 2029 and 2027 for federal and state income tax
purposes. We engaged in clinical testing activities and incurred expenses that qualify for the federal orphan drug tax credit. At December 31, 2021, we had
available orphan drug tax credits for federal purposes only of approximately $119.6 million. If not utilized, the orphan drug credits begin to expire in 2035.

As  provided  by  Section  382  of  the  Internal  Revenue  Code  of  1986,  or  Section  382,  and  similar  state  provisions,  utilization  of  NOLs  and  tax  credit
carryforwards may be subject to substantial annual limitations due to ownership change limitations that have previously occurred or that could occur in the
future. Ownership changes may limit the amount of NOLs and tax credit carryforwards that can be utilized annually to offset future taxable income and tax,
respectively. In general, an ownership change, as defined by Section 382, results from transactions that increase the ownership of five percent stockholders
in the stock of a corporation by more than 50 percent in the aggregate over a three year period. We completed a review of our changes in ownership through
December  31,  2021  and  determined  that  transactions  have  resulted  in  no  ownership  changes  during  the  year  ended  December  31,  2021,  as  defined  by
Section 382. The impact of the historical ownership changes has been reflected in our deferred tax assets in the table above.

As  required  by  ASC  740,  we  have  evaluated  the  positive  and  negative  evidence  bearing  upon  the  realizability  of  our  deferred  tax  assets.  Based  on  the
weight of available evidence, both positive and negative, we recorded a valuation allowance of $236.5 million and $594.8 million as of December 31, 2021
and December 31, 2020, respectively, because we have determined that it is more likely than not that these assets will not be fully realized. The valuation
allowance decreased by $358.3 million for the year ended December 31, 2021 primarily due to the utilization of net operating losses and tax credits and
increased by $92.5 million for the year ended December 31, 2020 primarily due to the generation of net operating losses.

The following table presents our change in valuation allowance for the years ended December 31, 2021 and, 2020:
(in thousands)

2021

2020

Valuation allowance at the beginning of the year
(Decrease) Increase for the current period
Valuation allowance at the end of the year

$

$

594,752  $
(358,274)
236,478  $

502,209 
92,543 
594,752 

In December 2019, the FASB issued Accounting Standards Update No. 2019-12 – Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes,
as  part  of  its  initiative  to  reduce  complexity  in  the  accounting  standards.  The  amendments  in  ASU  2019-12  eliminate  certain  exceptions  related  to  the
approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for
outside basis differences. ASU 2019-12 also clarifies and simplifies other aspects of the accounting for income taxes. The amendments in ASU 2019-12 are
effective for the fiscal years beginning after December 15, 2020. Early adoption is permitted, including adoption in any interim period. The Company has
early adopted this amendment as of January 1, 2019. There was no material impact to the Company’s consolidated financial position, results of operation,
or cash flows.

As of December 31, 2021, the unremitted earnings of our foreign subsidiaries are not material. We have not provided for U.S. income taxes or foreign
withholding taxes on these earnings as it is our current intention to permanently reinvest these earnings outside the U.S. The tax liability on these earnings
is also not material. Events that could trigger a tax liability include, but are not limited to, distributions, reorganizations or restructurings and/or tax law
changes.

We  apply  the  accounting  guidance  in  ASC  740  related  to  accounting  for  uncertainty  in  income  taxes.  Our  reserves  related  to  taxes  are  based  on  a
determination  of  whether,  and  how  much  of,  a  tax  benefit  taken  by  us  in  our  tax  filings  or  positions  is  more  likely  than  not  to  be  realized  following
resolution of any potential contingencies present related to the tax benefit.

The following table presents our unrecognized tax benefits activity for the years ended December 31, 2021 and 2020:

(In thousands)
Unrecognized tax benefits at the beginning of the year
Gross increases - current period tax positions
Unrecognized tax benefits at the end of the year

2021

2020

$

$

21,131  $
3,089 
24,220  $

17,460 
3,671 
21,131 

We will recognize interest and penalties related to uncertain tax positions above the line as an expense to continuing operations. As of December 31, 2021
and 2020, we had no accrued interest or penalties related to uncertain tax positions and no such amounts have been recognized. If all of the Company’s
unrecognized tax benefits as of December 31, 2021 were to become recognizable in the future, we would record $24.2 million of unrecognized tax benefits.
The uncertain tax position does not impact our effective income tax rate due to the full valuation allowance.

F-25

We are subject to taxation in the United States, Switzerland, Netherlands, Germany, Italy and France. The statute of limitations for assessment by the IRS
and state tax authorities is open for tax years ending December 31, 2021, 2020, 2019, and 2018, although carryforward attributes that were generated for
tax years prior to 2018 may still be adjusted upon examination by the IRS or state tax authorities if they either have been, or will be, used in a future period.
The statute of limitations for assessment in Switzerland remains open for tax years ending December 31, 2021, 2020, 2019, and 2018. The Company’s
subsidiaries in the Netherlands and Germany were incorporated in 2019 and therefore the statute of limitations for assessment that remain open in these
jurisdictions are for the tax years ending December 31, 2021, 2020 and 2019. The Company’s subsidiaries in Italy and France were incorporated in 2020
and therefore the statute of limitations for assessment that remain open in these jurisdictions are for the tax years ending December 31, 2021 and 2020.
There are currently no federal, state or foreign audits in progress.

As of December 31, 2021, we have an income tax receivable of $2.9 million recorded within prepaid expenses and other assets. There was no income tax
receivable at December 31, 2020.

Note 13. Defined Contribution Benefit Plan

We  sponsor  a  401(k)  retirement  plan,  in  which  substantially  all  of  our  full-time  employees  are  eligible  to  participate.  Participants  may  contribute  a
percentage  of  their  annual  compensation  to  this  plan,  subject  to  statutory  limitations.  We  will  make  matching  contributions  equal  to  100%  of  the
employee’s contributions, subject to a maximum of 4% of eligible compensation.

Note 14. Net Income (Loss) per Share

Basic net loss per share is calculated by dividing net loss by the weighted-average shares outstanding during the period, without consideration for common
stock equivalents. Diluted net loss per share is calculated by adjusting the weighted average shares outstanding for the dilutive effect of common stock
equivalents  outstanding  for  the  period,  determined  using  the  treasury  stock  method.  For  purposes  of  the  dilutive  net  loss  per  share  calculation,  stock
options,  RSUs,  PSUs  and  MSUs  for  which  the  performance  and  market  vesting  conditions,  respectively,  have  been  deemed  probable,  and  2013  ESPP
shares are considered to be common stock equivalents, while PSUs and MSUs with performance and market vesting conditions, respectively, that were not
deemed probable as of December 31, 2021 are not considered to be common stock equivalents.

We  utilize  the  control  number  concept  in  the  computation  of  diluted  earnings  per  share  to  determine  whether  potential  common  stock  equivalents  are
dilutive. The control number used is loss from continuing operations. The control number concept requires that the same number of potentially dilutive
securities applied in computing diluted earnings per share from continuing operations be applied to all other categories of income or loss, regardless of their
anti-dilutive effect on such categories. Since we had a net loss for continuing operations for all periods presented, no dilutive effect has been recognized in
the calculation of income from discontinued operations per share. Basic and diluted net loss per share was the same for all periods presented.

The  following  common  stock  equivalents  were  excluded  from  the  calculation  of  diluted  net  loss  per  share  applicable  to  common  stockholders  for  the
periods indicated because including them would have had an anti-dilutive effect:

Stock options
Restricted stock units
Performance-based stock units
Employee Stock Purchase Plan shares
Total

Note 15. Share Repurchase Program

2021

4,798,826 
1,002,924 
— 
39,864 
5,841,614 

Years ended December 31,
2020

6,143,046 
1,284,378 
— 
46,439 
7,473,863 

2019

6,201,485 
766,953 
72,046 
49,418 
7,089,902 

On  March  25,  2021,  we  announced  that  our  board  of  directors  authorized  the  Repurchase  Program  for  the  repurchase  of  up  to  $1.2  billion  of  our
outstanding  shares  of  common  stock.  On  March  31,  2021,  in  connection  with  the  Repurchase  Program,  we  entered  into  a  definitive  share  repurchase
agreement with BMS to repurchase 7.1 million shares of our common stock held by certain subsidiaries of BMS for an aggregate purchase price of $344.5
million, or $48.38 per share. This repurchase was completed on April 5, 2021.

Further, on April 2, 2021, in connection with the Repurchase Program, we entered into a Rule 10b5-1 repurchase plan to which we may repurchase up to
$600 million of shares of our common stock. As of December 31, 2021, we have repurchased

F-26

approximately  9.1  million  shares  of  common  stock  for  $458.0  million,  or  $50.35  per  share,  under  the  Rule  10b5-1  repurchase  plan.  In  total,  as  of
December 31, 2021, we have repurchased 16.2 million shares of common stock for $802.5 million, or $49.49 per share, under the Repurchase Program.

On October 5, 2021, we terminated our Rule 10b5-1 share repurchase plan and on October 13, 2021 we entered into a Rule 10b-18 repurchase plan that
allows us to conduct open market repurchases over time up to our remaining authorization under the Repurchase Program.

Repurchased shares are held as treasury stock until they are retired or re-issued. Treasury stock purchases are accounted for under the cost method whereby
the entire cost of the acquired stock is recorded as treasury stock. Repurchases of our common stock are accounted for as of the settlement date. There were
no retirements or re-issuances of treasury stock during the year ended December 31, 2021.

Note 16. Selected Quarterly Financial Data (Unaudited)

The following table contains quarterly financial information for 2021 and 2020:

2021 (in thousands, except per share data)

First
Quarter

Second
Quarter

Third
Quarter

Fourth
Quarter

Loss from continuing operations
Net income (loss) from discontinued operations, net of tax
Net income (loss)
Net loss from continuing operations per share - basic and diluted
Net income (loss) from discontinued operations per share - basic
and diluted
Net income (loss) per share - basic and diluted

$

(90,877) $

1,965,202 
1,874,325 
(1.31)

28.26 
26.95 

(82,790) $
(3,427)
(86,217)
(1.36)

(0.06)
(1.41)

(84,259) $
(4,507)
(88,766)
(1.48)

(0.08)
(1.56)

(98,584)
3,957 
(94,627)
(1.81)

0.07 
(1.74)

2020 (in thousands, except per share data)

First
Quarter

Second
Quarter

Third
Quarter

Fourth
Quarter

Loss from continuing operations
Net income (loss) from discontinued operations, net of tax
Net income (loss)
Net loss from continuing operations per share - basic and diluted
Net income (loss) from discontinued operations per share - basic
and diluted
Net income (loss) per share - basic and diluted

$

(84,094) $
43,838 
(40,256)
(1.23)

0.64 
(0.59)

(81,495) $
(8,983)
(90,478)
(1.18)

(0.13)
(1.31)

(79,175) $
(19,804)
(98,979)
(1.15)

(0.29)
(1.43)

(84,541)
(13,116)
(97,657)
(1.22)

(0.19)
(1.41)

17. Subsequent Events

On  February  17,  2022,  the  FDA  approved  PYRUKYND®  for  the  treatment  of  hemolytic  anemia  in  adults  with  pyruvate  kinase  (PK)  deficiency  in  the
United States.

F-27

        THIS  SUBLEASE  AGREEMENT  (the  “Sublease”)  is  made  as  of  the  27th  day  of  July,  2021,  by  and  between  Agios
Pharmaceuticals,  Inc.,  a  Delaware  corporation  (“Sublandlord”)  and  Prime  Medicine,  Inc.,  a  Delaware  corporation
(“Subtenant”).

SUBLEASE AGREEMENT

RECITALS:

    WHEREAS, Up 64 Sidney Street, LLC, a Delaware limited liability company, as landlord (“Landlord”), and Sublandlord, as
tenant, are parties to that certain lease agreement dated November 17, 2017 (the “Prime Lease”) pursuant to which Landlord
has leased to Sublandlord certain premises containing approximately 27,083 rentable square feet of laboratory and office space
(the “Premises”) on the fourth (4 ) floor of the building commonly known as 64 Sidney Street, Cambridge, Massachusetts (the
“Building”). A redacted copy of the Prime Lease is attached hereto as Exhibit A.

rd

    WHEREAS, Sublandlord desires to sublease to Subtenant and Subtenant desires to sublease from Sublandlord the Premises
in accordance with the provisions of this Sublease.

    NOW THEREFORE, in consideration of the premises, the rents, and the mutual covenants herein contained, and other good
and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows:

1.

Sublease  of  Premises. Sublandlord  does  hereby  sublease  to  Subtenant,  and  Subtenant  does  hereby  sublease
from  Sublandlord,  for  the  Term  (as  hereinafter  defined)  and  upon  the  conditions  hereafter  provided,  the  Premises,  as  further
described on Exhibit B to the Prime Lease and as depicted on Exhibit C to the Prime Lease located in the Building. The Building
is a part of the University Park at MIT as depicted on Exhibit C-1 to the Prime Lease. The Premises being sublet to Subtenant by
Sublandlord under this Sublease are the same premises being leased by Sublandlord from Landlord under the Prime Lease.

2.

Term.  The  Term  of  this  Sublease  shall  commence  on  the  later  of  (i)  the  date  of  full  execution  and  delivery  of
Landlord’s  consent  to  this  Sublease,  and  (ii)  the  date  of  the  vacating  and  decommissioning  of  the  Premises  by  the  current
tenant, and in no event later than April 15, 2022 (the “Commencement Date”), and shall expire, absolutely and without the need
for  notice  from  either  party  to  the  other,  on  that  date  which  is  three  (3)  years  after  the  Commencement  Date,  unless  the
Commencement Date does not occur on the 1  calendar day of a calendar month, in which case the Term shall end on the date
which  is  three  (3)  years  following  the  last  day  of  the  calendar  month  in  which  the  Commencement  Date  occurs  (the  “Term”),
unless otherwise terminated as hereinafter provided. Notwithstanding the foregoing, in the event that the Commencement Date
has not occurred by June 1, 2022, Sublandlord and Subtenant shall each have the right to terminate this Sublease, which shall
then be of no further force or effect.

st

3.

Rent.

        a.    Beginning on the Commencement Date (the “Rent Commencement Date”), Subtenant shall pay to Sublandlord, in
lawful money of the United States, base annual rent (the “Base Rent”) during the first year of the Term in the amount of Three
Million One Hundred Fourteen Thousand Five Hundred Forty Five and 00/100 Dollars ($3,114,545.00), payable in equal monthly
installments of Two Hundred Fifty Nine Thousand Five Hundred Forty Five and 42/100 ($259,545.42) which are payable on or
before the first (1 ) day of each calendar month during the Term, without notice or demand and without abatement, set-off or
deduction  (except  that  Subtenant  shall  pay  the  first  monthly  installment  on  the  execution  hereof),  which  Base  Rent  shall  be
adjusted  on  each  anniversary  of  the  Commencement  Date  (unless  the  Commencement  Date  is  other  than  the  first  day  of  a
month, in which event the Base

st

    1

100565089.1

Annual Rent shall be adjusted on the anniversary of the first day of the calendar month following the Commencement Date) as
follows:

    Period        Base Annual Rent         Base Monthly Rent

    Year 1            $ 3,114,545.00        $ 259,545.42
    Year 2            $ 3,207,981.35        $ 267,331.78
    Year 3            $ 3,304,220.79        $ 275,351.73

b.        Subtenant  shall  also  be  responsible  for  any  and  all  charges,  fees  or  expenses  payable  under  the  Prime
Lease  that  are  attributable  to  the  Subtenant’s  use  or  occupancy  of  the  Premises,  including:  (i)  the  Tenant’s  Tax  Expense
Allocable to the Premises (as such term is defined in Section 3.2(b) of the Prime Lease); (ii) the Tenant’s Operating Expenses
Allocable  to  the  Premises  (as  such  term  is  defined  in  Section  3.3(b)  of  the  Prime  Lease);  (iii)  any  additional  rent  payable  on
account of Subtenant’s use of excess heating, ventilation and air conditioning and electricity, but in no event shall Subtenant use
more  electricity  in  the  Subleased  Premises  than  that  which  the  feeders,  risers,  panels  and  other  electricity  supply  equipment
serving  the  Premises  are  capable  of  safely  supplying;  (iv)  amounts  payable  to  Landlord  or  Sublandlord  for  separately  sub-
metered utilities and services pursuant to Section 3.4 of the Prime Lease; and (v) any additional rent payable on account of any
services provided by Landlord or Sublandlord to Subtenant or otherwise attributable to or arising out of the use or occupancy of
the Premises (collectively, “Additional Rent”). Additional Rent shall be paid within ten (10) days of Tenant’s receipt of Landlord’s
invoice  therefor.  Notwithstanding  anything  to  the  contrary  set  forth  in  this  subsection  3(b),  Sublandlord  shall  provide  to
Subtenant,  at  least  thirty  (30)  days  prior  to  the  beginning  of  each  calendar  year  during  the  Sublease  Term,  an  estimated
expense budget.

c.    During the Term, the Subtenant shall pay directly to the provider charges for all separately metered utilities
serving  the  Premises,  including  gas  and  electric,  and  shall  pay  to  Sublandlord  as  Additional  Rent  its  pro  rata  share  of  water,
sewer and other services and utilities which shall be prorated to reflect Subtenant’s proportional usage based upon Subtenant’s
proportional occupancy of the Building.

d.    Supplementing, but without limiting the provisions of Sections 3.b. and 3.c. above, Subtenant agrees to pay
to Sublandlord as Additional Rent, all charges for operating expenses, taxes, insurance, utilities and all other charges for which
Sublandlord  is  responsible,  whether  under  the  Prime  Lease  or  otherwise  (other  than  those  that  are  expressly  stated  in  this
Sublease  to  be  Sublandlord’s  responsibility),  relating  to  the  Premises  and  payable  by  Sublandlord  to  Landlord.  The  parties
intend that this Sublease shall constitute a “net lease,” so that rent shall provide Sublandlord with “net” return for the Term, free
of any expenses or charges with respect to the Premises, except as otherwise provided in this Sublease.

4.

Extension  Option.  On  the  conditions  (which  conditions  Sublandlord  may  waive  in  its  sole  discretion  by  written
notice to Tenant) that both at the time Subtenant exercises the Extension Option (as defined below) or at any time thereafter
until the commencement of the corresponding Extension Term (as defined below) (i) there exists no event of default hereunder,
(ii) this Sublease is still in full force and effect, and (iii) Sublandlord shall have determined in its sole discretion, and shall have
advised  Subtenant  of  such  determination  within  fifteen  (15)  days  of  receipt  of  Subtenant’s  Extension  Notice  (as  hereinafter
defined), to make the Premises available to Subtenant for lease for the Extension Term, Subtenant may extend the term of the
Sublease (the “Extension Option”) for one (1) period of six (6) months (the “Extension Term”) by delivering written notice of its
exercise of the Extension Option no later than nine (9) months prior to the expiration of the Term (the “Extension Notice”). The
Base Rent for such Extension Term shall be at the prevailing fair market rate for comparable space for a 5-year term in the Mid-
Cambridge submarket, as such fair market rate is determined by Sublandlord in its sole but reasonable discretion.

    2

100565089.1

5.

Condition  of  Premises.  Sublandlord  shall  deliver  the  Premises  to  Subtenant  in  it’s  “as  is,  where  is”  condition
provided that the Premises shall be appropriately demised and with all required base building systems, including, but not limited
to, HVAC, electrical, life safety and plumbing systems in good working condition and suitable for the permitted use hereunder.
Sublandlord  shall  be  responsible  for  maintaining  all  base  building  systems,  including,  but  not  limited  to,  HVAC,  electrical,  life
safety  and  plumbing  systems.  Subtenant’s  taking  possession  of  the  Premises  shall  be  conclusive  evidence  as  against
Subtenant  that  the  Premises  were  in  good  order  and  satisfactory  condition  when  Subtenant  took  possession.  No  promise  of
Sublandlord  to  alter,  remodel  or  improve  the  Premises  and  no  representation  respecting  the  condition  of  the  Premises  or  the
Building  have  been  made  to  Subtenant.  Additionally,  throughout  the  Term,  Subtenant  shall  have  the  right  to  use  the  existing
furniture  and  IT/AV  equipment  in  the  Premises;  such  existing  furniture  and  IT/AV  equipment  is  listed  herein  in  Exhibit  B  (the
“Existing Furniture and Equipment”); such use is included as part of Base Rent. Subtenant shall have no obligation to remove
the Existing Furniture and Equipment at the end of the Term unless Subtenant and Sublandlord mutually agree that Subtenant
will purchase any of the Existing Furniture and Equipment, in which event Subtenant shall remove the same at the expiration or
earlier termination of the Sublease Term.

Use. Subtenant will use and occupy the Premises solely laboratory and general office use purposes for research
and development and any ancillary uses related thereto and for no other purpose except as may be permitted by applicable law.

6.

7.

Security Deposit/Letter of Credit. As a material inducement for Sublandlord to enter into this Sublease, Subtenant
shall deliver on the date hereof an irrevocable, unconditional standby letter of credit issued by Subtenant’s financial institution for
the benefit of Sublandlord in the face amount of Seven Hundred Seventy Eight Thousand Six Hundred Thirty Six and 26/100
($778,636.26) Dollars (the “Letter of Credit”), receipt whereof is hereby acknowledged by Sublandlord. Subtenant shall cause
the Letter of Credit to be renewed annually and shall provide to Sublandlord written confirmation of such renewal at least thirty
(30) days prior to its expiration. Sublandlord may submit to the issuer of any Letter of Credit hereunder from time to time draws
for payment as Sublandlord deems necessary or desirable in order to cure or otherwise remedy any Subtenant default. Within
ten (10) days after submission of any request for payment by Sublandlord under any Letter of Credit (a “Draw”), Subtenant shall
deliver  to  Sublandlord  written  amendment  of  such  Letter  of  Credit  restoring  the  amount  available  to  be  drawn  thereunder  by
Sublandlord to the same level existing immediately prior to the Draw or otherwise as required hereunder.

8.

Parking. Commencing  on  the  Rent  Commencement  Date  and  continuing through  the  Term,  Subtenant  shall  be
entitled to use and shall pay for 1.5 parking passes per 1,000 square feet (which shall initially be equal to forty-one (41) parking
passes) in accordance with Section 2.4 of the Prime Lease. For each such parking pass, Subtenant shall pay the higher rate of
either (i) $325.00 per month or (ii) the current monthly parking rate charged by Landlord in accordance with Section 2.4 of the
Prime Lease.

9.

Default Under and/or Termination of the Prime Lease.

a.        If  for  any  reason  the  term  of  the  Prime  Lease  is  terminated  prior  to  the  anticipated  expiration  date  of  this
Sublease,  this  Sublease  shall  thereupon  terminate,  and  Sublandlord  shall  not  be  liable  to  Subtenant  by  reason  thereof  for
damages  or  otherwise  (except  those  arising  out  of  Sublandlord’s  failure  to  remit  rent  to  Landlord  if  rent  hereunder  is  actually
received by Sublandlord from Subtenant, Sublandlord’s default hereunder) and Sublandlord shall return to Subtenant rent paid
in advance by Subtenant, if any, prorated as of the date of the termination of the Prime Lease.

    3

100565089.1

        b.    If Landlord elects to take over the right, title and interest of Sublandlord in accordance with the Prime Lease, it is
understood and agreed that Landlord shall not (i) be liable for any previous act or omission of Sublandlord under this Sublease,
(ii)  be  subject  to  any  offset  which  theretofore  accrued  to  Subtenant  against  Sublandlord,  and  (iii)  be  bound  by  any  previous
modification of this Sublease to which it has not consented, or by any previous prepayment of more than one month’s rent. In
such  event,  Subtenant  shall  also,  promptly  upon  Landlord’s  request,  execute  and  deliver  all  instruments  necessary  or
appropriate to confirm such attornment and recognition.

        c.    From and after the date of any default by Sublandlord resulting in a termination, reentry or dispossession under the
Prime  Lease,  until  the  date  that  this  Sublease  is  terminated  in  accordance  with  this  Section  7,  Subtenant  shall  pay  all  Base
Annual  Rent,  Additional  Rent  and  any  other  sums  due  by  Subtenant  under  the  Sublease  directly  to  Landlord  and  Subtenant
shall continue to perform all of its obligations hereunder.

10.

Notice of Default. Sublandlord hereby agrees to provide to Subtenant, within ten (10) business days after receipt
thereof, a copy of any notice of default under the Prime Lease which Sublandlord receives from Landlord. Subtenant shall have
the option of curing any monetary default which is not being contested by Sublandlord by forwarding to Sublandlord sufficient
funds to cure such default. Sublandlord hereby agrees to immediately remit such sums to Landlord.

11.

Subordination to and Incorporation of Terms of Prime Lease.

        a.    This Sublease is in all respects subject and subordinate to any mortgage, deed, deed of trust, ground lease or other
instrument now or hereafter encumbering the Building or the land on which it is located, to the terms and conditions of the Prime
Lease and to the matters to which the Prime Lease, including any amendments thereto, is or shall be subordinate. The terms,
provisions,  covenants,  stipulations,  conditions,  rights,  obligations,  remedies  and  agreements  of  the  Prime  Lease  are
incorporated  into  this  Sublease  by  reference  and  made  a  part  hereof  as  if  herein  set  forth  at  length,  and  shall,  as  between
Sublandlord  and  Subtenant  (as  if  they  were  the  landlord  and  the  tenant,  respectively,  under  the  Prime  Lease  and  as  if  the
Premises were the Premises demised under the Prime Lease), constitute the terms of this Sublease, except to the extent that
they do not relate to the Premises or are inapplicable to, or modified or eliminated by, the terms of this Sublease. Sublandlord
and Subtenant each agree to observe and be bound by each and every covenant, condition and provision of the Prime Lease
insofar as any such covenant, condition or provision affects the Premises or Subtenant's use thereof. Subtenant acknowledges
that  it  has  reviewed  and  is  familiar  with  the  Prime  Lease.  In  confirmation  of  the  subordination  provided  for  in  this  paragraph,
Subtenant  shall,  within  ten  (10)  days  after  Sublandlord's  reasonable  request,  promptly  execute  any  requested  or  appropriate
certificate or other document.

        b.    To the extent that Sublandlord is entitled under the Prime Lease to any abatement of rent as a result of damage or
casualty to the Premises, then Subtenant shall have the right to an abatement of rent hereunder in an amount equal to the total
rent required hereunder multiplied by a fraction equal to the number of square feet in the Premises rendered unusable divided
by the number of square feet in the Premises rendered unusable.

        c.     Subtenant hereby assumes and agrees to perform faithfully and be bound by, with respect to the Premises, all of
Sublandlord’s obligations, covenants, agreements and liabilities under the Prime Lease and all terms, conditions, provisions and
restrictions contained in the Prime Lease except the following provisions of the Prime Lease:

(i)
(ii)
(iii)

Section 2.6 – Extension Options;
Section 2.7 – Right of First Offer; and
Section 3.1 – Annual Fixed Rent.

    4

100565089.1

The  reference  in  this  Sublease  to  any  particular  section  or  article  of  the  Prime  Lease  shall  not  in  any  way  be  deemed  or
construed  to  derogate  from  the  general  incorporation  by  reference  of  the  entire  Prime  Lease  (except  as  aforesaid)  into  this
Sublease.

        d.    Subtenant shall not do anything which could result in a default under the Prime Lease or permit the Prime Lease to be
cancelled or terminated.

        e.    It is expressly understood and agreed that Sublandlord does not assume and shall not have any of the obligations or
liabilities of Landlord under the Prime Lease and that Sublandlord is not making the representations or warranties, if any, made
by Landlord in the Prime Lease. With respect to work, services, repairs and restoration or the performance of other obligations
required  of  Landlord  under  the  Prime  Lease,  Sublandlord’s  sole  obligation  with  respect  thereto  shall  be  to  request  the  same,
upon  written  request  from  Subtenant,  and  to  use  reasonable  efforts  to  obtain  the  same  from  Landlord,  which  efforts  shall  not
require initiating any litigation. Sublandlord shall not be liable in damages, nor shall rent abate hereunder, for or on account of
any failure by Landlord to perform the obligations and duties imposed on it under the Prime Lease.

        f.    Whenever Subtenant desires to do any act or thing that requires the consent or approval of the Landlord pursuant to
the  Prime  Lease,  (i)  Subtenant  shall  not  do  such  act  or  thing  without  first  having  obtained  the  consent  or  approval  of  both
Landlord and Sublandlord (and Sublandlord’s right to withhold consent or approval shall be independent of Landlord’s right), and
(ii)  in  no  event  shall  Sublandlord  be  required  to  give  its  consent  or  approval  prior  to  Landlord  doing  so,  unless  required  by
Landlord.

12.

Signage.  Sublandlord,  at  its  sole  cost  and  expense,  shall  request  that  Landlord  provide  to  Subtenant  Building
standard signage on all tenant directories at the Building as well as at the entrance to the Premises. All signage to be installed at
the Premises shall be subject to the approval of Landlord and subject to the terms of the Prime Lease.

13.

Building Rules and Regulations. Subtenant shall comply with all rules and regulations of the Building.

14.

Alterations. Notwithstanding anything to the contrary contained in the Prime Lease, Subtenant shall not make any
improvements,  alterations  or  changes  to  the  Premises  whatsoever,  including  without  limitation,  structural  or  non-structural
changes, without the prior written consent of Sublandlord and Landlord and in accordance with the terms of the Prime Lease.
Subtenant will not suffer or permit to attach nor will it do any act or make any contract that may create the foundation of any
mechanic’s or other lien for work, labor, services or materials, or otherwise, and whenever any such lien shall be filed or shall
attach Subtenant will, within ten (10) days thereafter, secure a cancellation thereof by paying the same or in such other manner
prescribed by law.

15.

Insurance.  Subtenant  shall  maintain  insurance  of  the  kinds  and  in  the  amounts  required  to  be  maintained  by
Sublandlord under the Prime Lease and in accordance with all other requirements therein. All policies of liability insurance shall
name as additional insureds the Landlord and Sublandlord and their respective officers, directors or partners, as the case may
be, and the respective agents and employees of each of them. Subtenant shall deliver certificates evidencing such insurance
with delivery of the first month’s rent. Before taking occupancy of the Premises, Subtenant shall provide Sublandlord with proof
of such insurance.

16.

Assignment and Further Sublease. Provided that both on the date on which Subtenant notifies Sublandlord of its
desire to enter into an assignment and on the date on which such assignment is to take effect, Subtenant is not in default of any
of its obligations hereunder, during the term of the Sublease, Subtenant shall have the right to sub-sublease all or portion of the
Premises subject to (i) Sublandlord written consent, which shall not be

    5

100565089.1

unreasonably  withheld  or  delayed,  (ii)  Landlord’s  written  consent,  which  shall  be  subject  to  and  in  accordance  with  the  Prime
Lease (including the right to terminate the Lease, and, accordingly the Sublease) and (iii) payment of any fee which is required
by  the  Landlord.  Subtenant  will  remain  liable  for  all  obligations  under  the  Sublease.  Assignment  rights  shall  be  pursuant  the
Prime  Lease.  Subtenant  shall  provide  such  financial  and  other  information  regarding  the  proposed  assignee  as  requested  by
Sublandlord  and/or  Landlord.  In  the  event  that  Sublandlord  and  Landlord  consent  to  any  assignment  or  sublease  of  the
Premises,  as  a  condition  of  such  consent,  Subtenant  shall  pay  to  Sublandlord  fifty  percent  (50%)  of  any  rent,  sum  or  other
consideration  to  be  paid  or  given  in  connection  with  any  assignment  or  sublet  (after  first  deducting  Subtenant’s  reasonable
actual costs to sub-sublet the Premises), either initially or over time, in excess of Base Rent and Additional Rent hereunder, as if
such amount were originally called for by the terms of this Sublease as Additional Rent. Subtenant shall furnish Sublandlord with
a  sworn  statement,  certified  by  an  independent  certified  public  accountant,  setting  forth  in  detail  the  computation  of  any  such
excess  rent  (which  computation  shall  be  based  upon  generally  accepted  accounting  principles,  including  an  amortization  of
Subtenant’s actual costs in such assignment or sublease (e.g., the cost of commissions, improvement allowance and any other
reasonable  actual  out-of-pocket  transaction  cost)),  and  Sublandlord,  or  its  representatives,  shall  have  access  to  the  books,
records and papers of Subtenant in relation thereto, and to make copies thereof.

17.

Access. Subtenant shall be afforded access to the Premises 24 hours a day, 7 days a week, and 365 days a year,
and on all dates and at all times permitted by applicable government rules and regulations, and in accordance with the terms of
the Prime Lease, excluding emergency events, which may cause the Building to limit access to tenants. Subtenant shall have
24-hour access to the loading dock and freight elevator at no additional cost.

18.

Surrender. Upon expiration of the Term or other termination of this Sublease, Subtenant shall quit and surrender
to Sublandlord the Premises and remove all of its furniture, furnishings, personal property and equipment in order to leave the
Premises,  broom  clean  and  in  as  good  order,  repair  and  condition  as  they  were  on  the  date  the  Term  of  this  Sublease
commenced, ordinary wear and tear excepted. The obligations of Subtenant to perform this covenant shall survive the expiration
or other termination of this Sublease.

19.

Default; Remedies.

        a.    Sublandlord reserves the right to terminate this Sublease and Subtenant’s occupancy of the Premises in the event that
(i)  Subtenant  fails  to  make  any  Base  Rent  payment,  Additional  Rent  or  any  other  monetary  amount  due  under  this  Sublease
within  five  (5)  business  days  of  its  due  date,  or  (ii)  Subtenant  fails  to  observe  and  perform  any  of  its  obligations  under  this
Sublease within ten business (10) days after written notice thereof from Sublandlord, except to the extent such default cannot be
cured within said ten business (10) day period, in which event Subtenant shall have such additional time as may be necessary
to cure such default so long as Subtenant has commenced cure within such ten business (10) day period and is diligently and
continuously pursuing the remedies necessary to cure such default within thirty (30) days after notice thereof. The acceptance of
any late payments of Base Rent shall not be deemed a waiver of Sublandlord’s rights under this section. In the event it becomes
necessary  for  Sublandlord  to  enforce  its  rights  against  Subtenant  by  legal  action  Subtenant  shall  pay  all  of  Sublandlord’s
reasonable legal costs and expenses in connection therewith including reasonable legal fees provided that Sublandlord is the
prevailing party in such action.

        b.    In case of any such termination, Subtenant shall pay to and indemnify Sublandlord each month against all loss of rent
and  all  costs,  expenses,  or  obligations  which  Sublandlord  may  incur  by  reason  of  any  such  termination  between  the  time  of
termination and the end of the Term, or, at such election of Sublandlord, exercised at the time of the termination or at any time
thereafter, Subtenant shall pay to Sublandlord as damages, in a lump sum, the

    6

100565089.1

then present value of the aggregate amount of rent and other payments provided herein to be paid by Subtenant to Sublandlord
through  the  time  when  the  Term  of  this  Sublease  would  have  expired  but  for  the  default  by  Subtenant.  It  is  understood  and
agreed that at the time of the termination or at any time thereafter that Subtenant shall be liable for any expenses incurred by
Sublandlord in connection with obtaining possession of the Premises, with removing from the Premises property of Subtenant
and persons claiming under Subtenant (including warehouse charges), with putting the Premises into condition for delivery to
Landlord or reletting and with any reletting, including without limitation, attorneys’ fees and brokers’ fees, and that any monies
collected  from  any  reletting  shall  be  applied  first  to  the  foregoing  expenses  and  then  to  the  payment  of  rent  and  all  other
payments due from Subtenant to Sublandlord.

    7

100565089.1

20.

Indemnification. Subtenant shall indemnify and hold harmless Sublandlord from and against any and all losses,
claims, damages, liabilities, actions, costs and expenses (including reasonable attorneys’ fees) incurred by Sublandlord arising
out of or related to this Sublease or Subtenant’s use and occupancy of the Premises, unless caused by the intentional acts or
gross negligence of Sublandlord. This indemnification shall survive termination of this Sublease.

21.

Notices. Any notice required or permitted to be given hereunder shall be in writing and may be given by certified
mail, return receipt requested, personal delivery, Federal Express or other delivery service. If notice is given by certified mail,
return receipt requested, notice shall be deemed given three (3) days after the notice is deposited with the U.S. Mail, postage
prepaid, addressed to Subtenant or to Sublandlord at the address set forth below. If notice is given by personal delivery, Federal
Express or other delivery service, notice shall be deemed given on the date the notice is actually received by Sublandlord or
Subtenant. Either party may by notice to the other specify a different address for notice purposes.

    If to Sublandlord:    Agios Pharmaceuticals, Inc.
        88 Sidney Street
        Cambridge, MA 02139

    With a copy to:    Eckert, Seamans, Cherin & Mellott, LLC
        Two International Place, 16  Floor
        Boston, MA 02110
        Attn: Stuart A. Offner, Esq.

th

    If to Subtenant:    Prime Medicine, Inc.
        21 Erie Street
        Cambridge, MA 02139
        Attn: Keith Gottesdiener        

If Sublandlord receives any notice from Landlord which affects Subtenant or the Premises, Sublandlord shall provide Subtenant
with a copy thereof.

22.

Hold Over. If  Subtenant  holds  over  after  the  expiration  of  the  Term  or  earlier  termination  thereof,  such  tenancy
shall be a tenancy at sufferance, and shall not constitute a renewal hereof or an extension for any further term, and in such case
Base  Rent  shall  be  payable  at  a  monthly  rate  equal  to  (a)  150%  of  Base  Rent  and  Additional  Rent  applicable  during  the  last
rental  period  of  the  Term  for  any  holding  over  during  the  first  ninety  (90)  days  following  expiration  of  the  Term  or  earlier
termination thereof, and (b) 175% of Base Rent and Additional Rent applicable during the last rental period of the Term for any
holding over subsequent to the holding over period of subsection 22(a). Such tenancy shall be subject to every other applicable
term,  covenant  and  agreement  contained  herein.  For  purposes  of  this  paragraph  holding  over  shall  include  (i)  Subtenant’s
remaining in the Premises after the expiration or earlier termination of the Term, and/or (ii) failing to deliver the Premises in the
condition required in this Sublease or the Prime Lease. Nothing contained in this paragraph shall be construed as consent by
Sublandlord to any holding over by Subtenant, and Sublandlord expressly reserves the right to require Subtenant to surrender
possession of the Premises to Landlord as provided in the Sublease and Prime Lease upon the expiration or other termination
of this Sublease. If  Subtenant  holds  over  without  Sublandlord’s  express  written  consent,  and  tenders  payment  of  rent  for  any
period beyond the expiration of the Term by way of check (whether directly to Sublandlord, its agents, or to a lock box) or wire
transfer, Subtenant acknowledges and agrees that the cashing of such check or acceptance of such wire shall be considered
inadvertent and not be construed as creating a month-to-month tenancy. The provisions of this paragraph shall not be deemed
to  limit  or  constitute  a  waiver  of  any  other  rights  or  remedies  of  Sublandlord  provided  herein  or  at  law.  If  Subtenant  fails  to
surrender  the  Premises  upon  the  termination  or  expiration  of  this  Sublease,  in  addition  to  any  other  liabilities  to  Sublandlord
accruing therefrom,

    8

100565089.1

    
Subtenant shall protect, defend, indemnify and hold Sublandlord harmless from all loss, costs (including reasonable attorneys'
fees)  and  liability  resulting  from  such  failure,  including,  without  limiting  the  generality  of  the  foregoing,  any  claims  made  by
Landlord  or  any  succeeding  tenant  founded  upon  such  failure  to  surrender  and  any  lost  profits  to  Sublandlord  resulting
therefrom.
23.

Brokerage Commissions. Each party hereby represents and warrants to the other that it has had no dealings with
any real estate broker or agent in connection with this Sublease, excepting only CBRE, which shall be paid in accordance with
an existing agreement with Sublandlord, and that it knows of no other real estate broker or agent who is or might be entitled to a
commission in connection with this Sublease. Each party agrees to protect, defend, indemnify and hold the other harmless from
and  against  any  and  all  claims  inconsistent  with  the  foregoing  representations  and  warranties  for  any  brokerage,  finder’s  or
similar fee or commission in connection with this Sublease, if such claims are based on or relate to any act of the indemnifying
party which is contrary to the foregoing representations and warranties.

24. Waiver of Jury Trial. THE PARTIES HEREBY WAIVE THEIR RESPECTIVE RIGHTS TO TRIAL BY JURY IN ANY
ACTION  OR  PROCEEDING  INVOLVING  THE  PREMISES,  BUILDING  OR  ARISING  OUT  OF  THIS  SUBLEASE  OR  THE
PRIME LEASE.

25.

Modification. This Sublease may only be modified by written agreement signed by Sublandlord and Subtenant.

26.

Counterparts. This Sublease may be executed in counterparts, each of which shall be an original and all of which,

when assembled, shall constitute but one document.

27.
of Massachusetts.

Governing Law. The terms and provisions of this Sublease shall be governed by the laws of the Commonwealth

28.

Consent.  It  is  expressly  understood  and  agreed  that  this  Sublease,  and  the  parties’  rights  and  obligations
hereunder,  are  contingent  upon  the  Landlord’s  written  consent  of  this  Sublease.  If  Landlord’s  consent  shall  not  have  been
obtained within thirty (30) days after the date of this Sublease, Sublandlord and Subtenant shall each have the right to terminate
this Sublease by providing the other with its written election to do so before (but not after) Landlord’s consent is obtained (the
“Termination Notice”). In the event of such a termination, neither party shall have any further rights or obligations hereunder.

29.

Emergency  Generator  /  Roof  Rights.  The  emergency  generator  usage  is  at  capacity.  Subtenant  shall  have  the
right, upon approval by the Sublandlord and Landlord, to invest in and implement additional capacity (if feasible) and/or install a
generator at Tenant’s sole cost and expense.

30.

Shared Services. Shared  services  supporting  the  Premises  include  the  following:  compressed  air,  lab  vacuum,

nitrogen, glass wash and autoclave.

31.

Safety Permits. Subtenant shall be responsible for the acquisition and maintenance of the MWRA Permit.

[SIGNATURES APPEAR ON FOLLOWING PAGE.]

    9

100565089.1

        IN  WITNESS  WHEREOF,  the  Sublandlord  and  Subtenant  have  each  executed  this  Sublease  effective  as  of  the  date  first
above written.

SUBLANDLORD:

Agios Pharmaceuticals, Inc.,
a Delaware corporation

By:    /s/Jonathan Biller
Name: Jonathan Biller
Title: Chief Financial Officer, Head of Legal and Corporate Affairs

SUBTENANT:

Prime Medicine, Inc.,
a Delaware corporation

By:    /s/ Keith Gottesdiener
Name:    Keith Gottesdiener
Title:    Chief Executive Officer

Landlord hereby consents to this Sublease:

LANDLORD:

Up 64 Sidney Street, LLC,
a Delaware limited liability company

By:                            
Name:
Title:

    10

100565089.1

Exhibit “A”

Prime Lease

    11

100565089.1

Exhibit “B”

Existing Furniture and Equipment

    12

100565089.1

Entity
Agios Securities Corporation
Agios Limited
Agios International Sarl (GmbH)
Agios Netherlands B.V.
Agios Germany GmbH
Agios Italy S.R.L.
Agios France SARL

Exhibit 21.1

SUBSIDIARIES

State or other Jurisdiction of Incorporation or Organization
Massachusetts
Bermuda
Switzerland
The Netherlands
Germany
Italy
France

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-253498, 333-236523, 333-229669, 333-223031,
333-216106, 333-209755, 333-201796, 333-193802, and 333-190101) and Form S-3 (No. 333-237930) of Agios Pharmaceuticals, Inc. of our report dated
February 24, 2022 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

Exhibit 23.1

/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
February 24, 2022

I, Jacqualyn Fouse, certify that:

1. I have reviewed this Annual Report on Form 10-K of Agios Pharmaceuticals, Inc.;

CERTIFICATION

Exhibit 31.1

2. 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;

3. 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;

4. 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) 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;

(b) 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;

(c) 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

(d) 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) 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

(b) 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.

February 24, 2022

/s/ Jacqualyn A. Fouse
Jacqualyn A. Fouse, Ph.D
Chief Executive Officer
(principal executive officer)

 
Exhibit 31.2

I, Jonathan Biller, certify that:

1. I have reviewed this Annual Report on Form 10-K of Agios Pharmaceuticals, Inc.;

CERTIFICATION

2. 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;

3. 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;

4. 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) 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;

(b) 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;

(c) 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

(d) 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) 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

(b) 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.

February 24, 2022

/s/ Jonathan Biller

Jonathan Biller
Chief Financial Officer and Head of Corporate Affairs
(principal financial officer)

 
 
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.1

In connection with this Annual Report on Form 10-K of Agios Pharmaceuticals, Inc. (the “Company”) for the year ended December 31, 2021, as filed with
the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Jacqualyn Fouse, Chief Executive Officer of the Company,
hereby certifies, pursuant to 18 U.S.C. Section 1350, that, to her knowledge on the date hereof:

(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.

February 24, 2022

/s/ Jacqualyn A. Fouse
Jacqualyn A. Fouse, Ph.D.
Chief Executive Officer
(principal executive officer)

 
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.2

In connection with this Annual Report on Form 10-K of Agios Pharmaceuticals, Inc. (the “Company”) for the year ended December 31, 2021, as filed with
the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, Jonathan Biller, Chief Financial Officer and Head of Legal
and Corporate Affairs of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, that, to his knowledge on the date hereof:

(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.

February 24, 2022

/s/ Jonathan Biller

Jonathan Biller
Chief Financial Officer and Head of Corporate Affairs
(principal financial officer)