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Rhythm Pharmaceuticals

rytm · NASDAQ Healthcare
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FY2020 Annual Report · Rhythm Pharmaceuticals
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

‘

Washington, D.C. 20549

FORM 10-K

☒

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

For the fiscal year ended December 31, 2020
OR

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

For the transition period from           to         
Commission file number 001-38223

RHYTHM PHARMACEUTICALS, INC.

(Exact name of registrant as specified in its charter)

Delaware
(State or other jurisdiction of
incorporation or organization)

46-2159271
(I.R.S. Employer
Identification No.)

222 Berkeley Street
12th Floor
Boston, MA 02116
(Address of principal executive offices)
(Zip Code)

(857) 264-4280
 (Registrant’s telephone number, including area code)
N/A
(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class
Common Stock, $0.001 par value per share

Trading Symbol(s)
RYTM

Name of each exchange on which registered
The Nasdaq Stock Market LLC (Nasdaq Global Market)

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  ☒

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

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.

Large accelerated filer ☒

Non-accelerated filer ☐

               Accelerated filer ☐

Smaller reporting company ☐
Emerging growth company ☐

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 Exchange Act). Yes  ☐  No  ☒.

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant was approximately $828.1 million, based on the closing price of
the registrant’s Common Stock on June 30, 2020, the last business day of the registrant’s most recently completed second fiscal quarter. Solely for purposes of this disclosure,
Common Stock held by executive officers, directors and certain stockholders of the registrant as of such date have been excluded because such holders may be deemed to be
affiliates.
There were 50,181,164 shares of the registrant's Common Stock outstanding as of February 19, 2021.

DOCUMENTS INCORPORATED BY REFERENCE
The registrant intends to file a definitive proxy statement for the registrant's 2021 Annual Meeting of Stockholders within 120 days of the end of the fiscal year ended December
31, 2020. Portions of such definitive proxy statement are incorporated by reference into Part III of this Annual Report on Form 10-K.

Table of Contents

RHYTHM PHARMACEUTICALS, INC.
ANNUAL REPORT ON FORM 10-K
For the Year Ended December 31, 2020

Table of Contents

     Page No.

PART I

PART II

Item 1.    Business

Item 1A. Risk Factors

Item 1B. Unresolved Staff Comments

Item 2.    Properties

Item 3.    Legal Proceedings

Item 4.    Mine Safety Disclosures

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

of Equity Securities

Item 6.   Selected Financial Data

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

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

Item 8.   Financial Statements and Supplementary Data

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

Item 9A. Controls and Procedures

Item 9B. Other Information

PART III

Item 10. Directors, Executive Officers and Corporate Governance

Item 11. Executive Compensation

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

Stockholder Matters

Item 13. Certain Relationships and Related Transactions and Director Independence

Item 14. Principal Accountant Fees and Services

PART IV

Item 15. Exhibits and Financial Statement Schedules

Item 16. Form 10-K Summary

SIGNATURES

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This  Annual  Report  on  Form  10-K,  or  this  Annual  Report,  contains  forward-looking  statements  within  the
meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities
Exchange Act of 1934, as amended, or the Exchange Act, and is subject to the “safe harbor” created by those sections. Any
statements about our expectations, beliefs, plans, objectives, assumptions or future events or performance are not historical
facts and may be forward-looking. Some of the forward-looking statements can be identified by the use of forward-looking
terms  such  as  “anticipates,”  “believes,”  “could,”  “estimates,”  “expects,”  “intends,”  “may,”  “might,”  “likely,”  “plans,”
“potential,” “predicts,” “projects,” “seeks,” “should,” “target,” “will,” “would,” or similar expressions and the negatives of
those terms include forward-looking statements that involve risks and uncertainties.  Forward-looking statements include,
but  are  not  limited  to,  statements  regarding  proceeds  from  the  Rare  Pediatric  Disease  Priority  Review  Voucher,  or  PRV
Transfer,  the  marketing  and  commercialization  of  IMCIVREE  (setmelanotide),  and  the  timing  of  commercialization,  the
success, cost and timing of our product development activities and clinical trials, our financial performance, including our
expectations regarding our existing cash, operating losses, expenses, sources of future financing and sufficiency of cash,
our ability to hire and retain necessary personnel, patient enrollments and the timing thereof, the timing of announcements
regarding results of clinical trials and filing of regulatory applications, our ability to protect our intellectual property, our
ability  to  negotiate  our  collaboration  agreements,  if  needed,  our  marketing,  commercial  sales,  and  revenue  generation,
expectations  surrounding  our  manufacturing  arrangements,  the  impact  of  the  COVID-19  pandemic  on  our  business  and
operations and our future financial results, and the impact of accounting pronouncements.  We have based these forward-
looking  statements  largely  on  our  current  expectations  and  projections  about  future  events  and  financial  trends  that  we
believe may affect our business, financial condition and results of operations. We cannot guarantee future results, levels of
activity, performance or achievements, and you should not place undue reliance on our forward-looking statements. Our
actual results may differ significantly from the results discussed in the forward-looking statements. Important factors that
might cause such a difference include, but are not limited to, those set forth in Item 1A. “Risk Factors” and elsewhere in
this  Annual  Report.  Moreover,  we  operate  in  an  evolving  environment.  New  risk  factors  and  uncertainties  may  emerge
from  time  to  time,  and  it  is  not  possible  for  management  to  predict  all  risk  factors  and  uncertainties.  Except  as  may  be
required  by  law,  we  have  no  plans  to  update  our  forward-looking  statements  to  reflect  events  or  circumstances  after  the
date  of  this  Annual  Report.  We  caution  readers  not  to  place  undue  reliance  upon  any  such  forward-looking  statements,
which speak only as of the date made.

Unless the content requires otherwise, references to “Rhythm Pharmaceuticals,” “Rhythm,” “the Company,” “we,”

“our,” and “us,” in this Annual Report refer to Rhythm Pharmaceuticals, Inc. and its subsidiaries.

TRADEMARKS, TRADENAMES AND SERVICE MARKS

This  Annual  Report  may  include  trademarks,  tradenames  and  service  marks  that  are  the  property  of  other
organizations. Solely for convenience, trademarks and tradenames referred to in this Annual Report may appear without
the ® and ™ symbols, but those references are not intended to indicate, in any way, that we will not assert, to the fullest
extent  under  applicable  law,  our  rights  or  that  the  applicable  owner  will  not  assert  its  rights,  to  these  trademarks  and
tradenames.

SUMMARY RISK FACTORS

Our business is subject to numerous risks and uncertainties, including those described in Part I, Item 1A. “Risk
Factors” in this Annual Report. You should carefully consider these risks and uncertainties when investing in our common
stock. The principal risks and uncertainties affecting our business include the following:

● We  are  a  commercial-stage  biopharmaceutical  company  with  a  limited  operating  history  and  have  not
generated any revenue from product sales. We have incurred significant operating losses since our inception,
anticipate that we will incur continued losses for the foreseeable future and may never achieve profitability.

● We will need to raise additional funding, which may not be available on acceptable terms, or at all. Failure to
obtain this necessary capital when needed may force us to delay, limit or terminate our product development
efforts or other operations.

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● The COVID-19 pandemic has and may continue to adversely impact our business, including our preclinical

studies, clinical trials and our commercialization prospects.

● We have only one approved product, which is still in clinical development in additional indications, and we

may not be successful in any future efforts to identify and develop additional product candidates.

● The successful commercialization of IMCIVREE and any other product candidates will depend in part on the
extent  to  which  governmental  authorities,  private  health  insurers,  and  other  third-party  payors  provide
coverage  and  adequate  reimbursement  levels.  Failure  to  obtain  or  maintain  coverage  and  adequate
reimbursement  for  setmelanotide  or  our  other  product  candidates,  if  any  and  if  approved,  could  limit  our
ability to market those products and decrease our ability to generate revenue.

● Positive results from early clinical trials of setmelanotide may not be predictive of the results of later clinical
trials of setmelanotide. If we cannot generate positive results in our later clinical trials of setmelanotide, we
may  be  unable  to  successfully  develop,  obtain  regulatory  approval  for  and  commercialize  additional
indications for setmelanotide.

● The  number  of  patients  suffering  from  each  of  the  MC4R  pathway  deficiencies  is  small  and  has  not  been
established with precision. If the actual number of patients with any of these conditions is smaller than we
had  estimated,  our  revenue  and  ability  to  achieve  profitability  will  be  materially  adversely  affected.
Moreover, our ability to recruit patients to our trials may be materially adversely affected. Patient enrollment
may also be adversely affected by competition and other factors.

● Failures or delays in the commencement or completion of our planned clinical trials of setmelanotide could
result in increased costs to us and could delay, prevent or limit our ability to generate revenue and continue
our business.

● Changes  in  regulatory  requirements,  FDA  guidance  or  unanticipated  events  during  our  clinical  trials  of
setmelanotide  may  occur,  which  may  result  in  changes  to  clinical  trial  protocols  or  additional  clinical  trial
requirements,  which  could  result  in  increased  costs  to  us  and  could  delay  our  development  timeline.
Additionally,  it  may  be  necessary  to  validate  different  or  additional  instruments  for  measuring  subjective
symptoms, and to show that setmelanotide has a clinically meaningful impact on those endpoints in order to
obtain regulatory approval.

● Even if we complete the necessary clinical trials, the regulatory and marketing approval process is expensive,
time  consuming  and  uncertain  and  may  prevent  us  from  obtaining  additional  approvals  for  the
commercialization  of  setmelanotide  beyond  FDA  approval  for  obesity  due  to  proopiomelanocortin,  or
POMC, proprotein convertase subtilisin/kexin type 1, or PCSK1, or leptin receptor, or LEPR, deficiencies in
the United States. We depend entirely on the success of setmelanotide, and we cannot be certain that we will
be able to obtain additional regulatory approvals for, or successfully commercialize, setmelanotide. If we are
not able to obtain, or if there are delays in obtaining, required additional regulatory approvals, we will not be
able to commercialize setmelanotide in additional indications in the United States or in foreign jurisdictions,
and our ability to generate revenue will be materially impaired.

● Our approach to treating patients with MC4R pathway deficiencies requires the identification of patients with
unique  genetic  subtypes,  for  example,  POMC  genetic  deficiency.  The  FDA  or  other  equivalent  competent
authorities  in  foreign  jurisdictions  could  require  the  clearance,  approval  or  CE  marking  of  an  in  vitro
companion  diagnostic  device  to  ensure  appropriate  selection  of  patients  as  a  condition  of  approving
setmelanotide in additional indications. The requirement that we obtain clearance, approval or CE mark of an
in vitro companion diagnostic device will require substantial financial resources, and could delay or prevent
the  receipt  of  additional  regulatory  approvals  for  setmelanotide,  or  adversely  affect  those  we  have  already
obtained.

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● Our  product  candidates  may  cause  undesirable  side  effects  that  could  delay  or  prevent  their  regulatory
approval, limit the commercial profile of an approved labeling or result in significant negative consequences
following marketing approval, if any.

● Our  industry  is  intensely  competitive.  If  we  are  not  able  to  compete  effectively  against  current  and  future
competitors, we may not be able to generate revenue from the sale of IMCIVREE, our business will not grow
and our financial condition and operations will suffer.

● If  we  are  unable  to  adequately  protect  our  proprietary  technology  or  maintain  issued  patents  that  are
sufficient  to  protect  setmelanotide,  others  could  compete  against  us  more  directly,  which  would  have  a
material adverse impact on our business, results of operations, financial condition and prospects.

PART I

Item 1. Business

Overview

We  are  a  commercial-stage  biopharmaceutical  company  focused  on  changing  the  paradigm  for  the  treatment  of
rare  genetic  diseases  of  obesity,  which  are  characterized  by  early-onset,  severe  obesity  and  an  insatiable  hunger  or
hyperphagia.  While  obesity  affects  hundreds  of  millions  of  people  worldwide,  we  are  advancing  a  precision  medicine
strategy for a subset of individuals whose severe obesity is due to genetic variants that impair the melanocortin-4 receptor,
or MC4R, pathway, a pathway in the brain that is responsible for regulating hunger, caloric intake and energy expenditure,
which consequently affect body weight. Our targeted therapy, IMCIVREE™ (setmelanotide), for which we hold worldwide
rights,  was  approved  in  November  2020  by  the  U.S.  Food  and  Drug  Administration,  or  FDA,  for  chronic  weight
management in adult and pediatric patients six years of age and older with obesity due to proopiomelanocortin, or POMC,
proprotein  convertase  subtilisin/kexin  type  1,  or  PCSK1,  or  leptin  receptor,  or  LEPR,  deficiency  confirmed  by  genetic
testing. As we prepare to make IMCIVREE commercially available to patients with these initial, ultra-rare indications, we
also are advancing a broad clinical development program for setmelanotide in an effort to expand the approved indication
to bring this potential therapy to approximately 100,000 to 200,000 patients in the United States and a similarly-sized rare
patient population in Europe.

Upon FDA approval in November 2020, IMCIVREE became the first FDA-approved therapy for use in patients
with  obesity  due  to  POMC,  PCSK1  or  LEPR  deficiencies.  The  approval  was  based  on  Phase  3  data  demonstrating  a
statistically significant and clinically meaningful impact on weight loss and hunger in patients 12 years old or older with
severe  obesity  due  to  POMC,  PCSK1  or  LEPR  deficiency.  A  Marketing  Authorization  Application,  or  MAA,  seeking
approval for setmelanotide for the treatment of obesity and the control of hunger associated with confirmed biallelic pro-
opiomelanocortin (POMC), including PCSK1, deficiency obesity or confirmed biallelic leptin receptor (LEPR) deficiency
obesity in adults and children 6 years of age and above is currently under review by the European Medicines Agency, or
EMA, and we expect to obtain regulatory approval from the EMA and make IMCIVREE commercially available in Europe
in  POMC,  PCSK1  and  LEPR  deficiency  obesities  in  the  second  half  of  2021.  Additionally,  in  December  2020,  we
announced  positive  topline  results  from  a  pivotal  Phase  3  clinical  trial  evaluating  setmelanotide  for  the  treatment  of
insatiable hunger and severe obesity in individuals with Bardet-Biedl syndrome, or BBS, or Alström syndrome. The study
met  its  primary  and  all  key  secondary  endpoints,  demonstrating  statistically  significant  and  clinically  meaningful
reductions in weight and hunger scores, with patients with BBS comprising all primary endpoint responders. No patients
with Alström syndrome met the primary endpoint. We are continuing to analyze the full data from patients with BBS or
Alström syndrome, which we plan to present at a medical meeting in the first half of 2021. We plan to complete regulatory
submissions to both the FDA and the EMA for BBS in the second half of 2021, and we expect to determine next steps for
Alström syndrome upon completing a full analysis of the final data from the Phase 3 trial.

We  also  are  advancing  a  broad  clinical  development  program  evaluating  setmelanotide  in  several  ongoing  and
planned clinical trials, and leveraging the largest known DNA database focused on obesity - with approximately 37,500
sequencing  samples  as  of  September  30,  2020  -  to  improve  the  understanding,  diagnosis  and  care  of  people  living  with
severe obesity due to certain variants in genes associated with the MC4R pathway. In January 2021, we announced positive

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proof-of-concept data from our ongoing exploratory Phase 2 Basket Study evaluating setmelanotide in patients with MC4R
pathway deficiencies due to a variant in one of the two alleles in the POMC, PCSK1, or LEPR genes, as well as the SRC1
and SH2B1 genes. Based on those interim data and results from our sequencing database, we announced plans to initiate a
potentially registration-enabling Phase 3 trial in the second half of 2021 evaluating setmelanotide in patients with obesity
due to a variant in one of the two alleles in the POMC, PCSK1, or LEPR genes, or HET obesity, as well as the SRC1 and
SH2B1  genes,  pending  further  discussions  with  the  FDA  and  MAA.  We  anticipate  announcing  top-line  data  from  an
additional  genetically  defined  cohort,  MC4R-rescuable,  from  this  same  study  in  the  first  half  of  2021.  In  addition,  we
announced  plans  for  an  expanded  Phase  2  Basket  Study  to  evaluate  setmelanotide  for  the  treatment  of  obesity  due  to  a
deficiency in one of 31 additional genes associated with the MC4R pathway in the second half of 2021. Our broad clinical
program  evaluating  setmelanotide  in  rare  diseases  of  obesity  also  includes  plans  to  initiate  a  Phase  2  study  evaluating
setmelanotide  in  patients  with  hypothalamic  obesity  in  the  first  half  of  2021,  a  Phase  2  study  in  pediatric  patients  with
MC4R pathway deficiencies between the ages of 2 and 6 years old in the second half of 2021, and a potential registration-
enabling study with our once-weekly formulation of setmelanotide in the second half of 2021.

While obesity is a complex problem with a variety of contributing and causal factors such as genetics and  a wide
range of environmental influences, we are taking a simple, three-step approach in our clinical development programs that
we  expect  will  translate  to  the  real-world  practice  of  medicine.  First,  we  will  identify  patients  with  early-onset  severe
obesity  (BMI>40  kg/m2  in  adults  or  BMI≥  95th  percentile  for  age  and  gender  for  patients  6  to  16  years  of  age)  and
hyperphagia. Second, with genetic testing, we will seek to confirm that these patients have a defect in one of 36 genes (or
more) related to the MC4R pathway. If these individuals test positive for such a genetic defect, they would be eligible for
enrollment  in  a  clinical  trial  evaluating  setmelanotide.  In  clinical  trials  across  several  different  genetic  deficiencies,  we
have seen patients respond with rapid weight loss of 5 percent or more in 12 to 16 weeks.  Based on our experience treating
up  to  more  than  100  patients  in  our  Phase  2  and  Phase  3  clinical  studies,  patients  who  achieve  5  percent  weight  loss  at
approximately 12 to 16 weeks on setmelanotide therapy tend to achieve 10 percent weight loss within a year, hence we
deem  these  patients  to  be  responders.  Weight  loss  of  this  magnitude,  particularly  in  patients  with  severe,  early-onset
obesity, is considered clinically-meaningful.

Our  sequencing-based  epidemiology  estimates  show  that  each  of  these  genetically-defined  MC4R  pathway
deficiencies  number  in  the  rare  or  ultra-rare  category,  according  to  established  definitions  of  rare  disease  patient
populations. Our epidemiology estimates are approximately 5,000 for U.S. patients in initial indications, including obesity
due to homozygous POMC, PCSK1 or LEPR deficiencies, and BBS and Alström syndrome. The epidemiology estimates
for  the  indications  studied  in  our  ongoing  exploratory  Phase  2  Basket  Study  (HETs  and  SRC1  or  SH2B1  deficiency)
suggest that between 100,000 to 200,000 U.S. patients with one of these genetic deficiencies have the potential to respond
to setmelanotide.  Despite the potential addressable patient population likely being larger than ultra-rare populations, these
patients face similar challenges as other patients with rare diseases, namely lack of awareness, resources, tests, tools and
especially therapeutic options.

We  are  pushing  to  expand  the  potential  global  market  for  IMCIVREE  beginning  with  obesities  from  POMC,
PCSK1  and  LEPR  deficiencies  and  lay  the  groundwork  for  regulatory  submissions  in  BBS  and  potentially  Alström
syndrome.    As  we  significantly  expand  our  clinical  development  programs,  our  disease  awareness  and  patient  finding
efforts  are  aligned  with  a  singular  focus  on  building  a  community  of  caregivers  and  healthcare  providers  focused  on
transforming the treatment of these diseases. We have medical science liaisons and disease education liaisons in the field in
the United States and Europe engaging with physicians who treat patients with severe obesity. We continue to bring health
care providers together with our Genetic Obesity Learning Development (GOLD) Academy, a series of U.S. based non-
CME  programs  we  sponsor.  And  our  sequencing  efforts,  now  primarily  focused  on  our  Uncovering  Rare  Obesity™
sponsored genetic testing program, fuel MC4R pathway research, disease education and awareness and patient finding.  

With approximately 90 employees in the United States and Europe, a rapidly expanding network of key opinion
leaders, and an increasing number of treated patients, we are focused on the changing the paradigm for the treatment of rare
genetic diseases of obesity. Key elements of our strategy include:

● Systematic  approach  to  understand  the  genes  that  are  part  of  the  MC4R  pathway:  With  the  largest

known obesity DNA database and our approach to translational research and clinical development, we

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believe we are uniquely positioned to drive the scientific understanding of the many genes that comprise or
affect the function of the MC4R pathway.  

● Rapidly advance development of setmelanotide to address as many patients as possible: We are focused
on expanding commercial availability in the United State, Europe and select other markets, and executing on
the  clinical  trials  which  will  further  inform  which  genes  affect  the  MC4R  pathway  and,  if  successful,
potentially  enable  registration  of  setmelanotide  in  an  expanding  number  of  indications.  With  multiple
planned  and  ongoing  Phase  2  and  3  trials,  we  anticipate  bringing  online  approximately  50  to  100  clinical
trials sites in the United States and Europe. Each of these trial sites will serve as a local hub for as many as
five to 10 more hospitals and obesity clinics in our growing referral network, and we will focus marketing
and communications efforts geographically to support genetic testing around trial sites in order to build these
local referral networks.

● Leverage genetic testing programs to feed clinical trial enrollment and commercial launch activities:
We are committed to expanding our obesity DNA database and expanding access and availability to genetic
testing for individuals with early-onset, severe obesity and hyperphagia. Approximately 10 to 15 percent of
patients  with  early-onset  severe  obesity  test  positive  for  a  defect  in  one  of  five  MC4R  pathway  genes
proposed  to  be  studied  in  our  upcoming  Phase  3  MC4R  Pathway  Study.  We  will  continue  to  expand  our
genetic testing effort focusing initially on clinical trial enrollment and early commercialization efforts.  We
expect  to  sequence  approximately  10,000  to  20,000  additional  obese  individuals  over  the  next  one  to  two
years with the goal to rapidly increase testing beyond those numbers in subsequent years.

● Lifecyle Management: As we make IMCIVREE available in our initial indications and build out our clinical
development  programs,  we  are  also  focused  on  developing  and  bringing  follow-on  product  candidates  to
market,  including  a  weekly  formulation  of  setmelanotide  designed  to  be  more  convenient  and  patient-
friendly, as well as an auto-injector for the once-weekly formulation. Additionally, we are planning a clinical
trial  in  pediatric  patients  from  2  years  to  5  years  in  age  with  obesity  due  to  POMC,  PCSK1  or  LEPR
deficiency  and  patients  with  BBS,  as  we  know  early-onset  obesity  manifests  between  the  ages  of  2  and  6
years old. We also are exploring more selective and potent MC4R agonists through preclinical development
of our library of MC4R agonist candidates.

● Ensure  global  access  to  IMCIVREE:  We  are  actively  pursuing  a  global  strategy  for  our  clinical
development,  commercial  and  community  building  programs.  We  are  building  an  emerging  international
organization focused on major markets in Europe, and we are actively exploring distributor opportunities to
provide setmelanotide to patients in the Middle East and South America.

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Our Product Pipeline

The  following  chart  depicts  key  information  regarding  the  development  of  setmelanotide,  including  the

indications we are pursuing within MC4R pathway deficiencies and the current state of development:

* Indicated for chronic weight management in adult and pediatric patients 6 years of age and older with obesity due to
POMC,  PCSK1  or  LEPR  deficiency  confirmed  by  genetic  testing  demonstrating  variants  in  POMC,  PCSK1,  or  LEPR
genes that are interpreted as pathogenic, likely pathogenic, or of uncertain significance.

Market Overview

Early-onset, Severe Obesity and the MC4R Pathway

All obesity is not the same, and rare genetic diseases of obesity are distinct from general obesity. The hallmark
characteristics  of  rare  genetic  diseases  of  obesity  are  early-onset,  severe  obesity  and  hyperphagia,  an  overwhelming,
heightened,  and  relentless  hunger  that  drives  a  severe  preoccupation  with  food  and  potentially  extreme  food-seeking
behaviors. Diet and lifestyle modifications fail to achieve meaningful weight loss in patients with rare genetic diseases of
obesity.  

Accordingly, the discovery that the MC4R pathway can regulate both hunger and energy expenditure separately—
helping maintain the balance between food intake and energy burn—has defined an important target for therapeutics. In
addition to obesity due to POMC, PCSK1 or LEPR deficiencies,  recent advances in genetic studies have identified several
diseases characterized at least in part with early-onset, severe obesity and hyperphagia that are the result of genetic defects
affecting  the  MC4R  pathway,  including  BBS,  Alström  syndrome,  POMC,  PCSK1,  and  LEPR  HETs,  SRC1  deficiency
obesity, SH2B1 deficiency obesity, MC4R deficiency obesity and deficiencies in upwards of 31 additional MC4R-related
genes.  With  a  deeper  understanding  of  this  critical  signaling  pathway,  we  are  taking  a  different  approach  to  drug
development by focusing on specific genetic deficiencies affecting the MC4R pathway. We believe that this approach has
the potential to provide dramatic improvements in weight and appetite by restoring lost function in the MC4R pathway.

Obesity Caused by Rare Genetic Deficiencies Affecting the MC4R Pathway

The  MC4R  pathway,  which  has  been  the  focus  of  extensive  scientific  investigation  for  many  years,  regulates

hunger, caloric intake, and energy expenditure, which consequently affect body weight. The critical role of the MC4R

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pathway in weight regulation is supported by the observation that single gene defects at many points in this pathway result
in early-onset, severe obesity.

The MC4R pathway is illustrated in the figure below. Under normal conditions, POMC neurons are activated by
brain satiety signals, including those resulting from the hormone leptin acting through LEPR. POMC neurons produce a
protein, which is processed by the PCSK1 enzyme, into melanocyte stimulating hormone, or MSH, the natural ligand, or
activator of the MC4R. When upstream genetic mutations disrupt this pathway, it can lead to insufficient MC4R activation
and the result is hyperphagia, or insatiable hunger, and severe obesity.

The  figure  below  also  illustrates  some  of  the  genes  that  are  upstream  of  the  MC4R  and  the  potential  effect

deficiencies in those genes may have on the activation of the MC4R, which regulates hunger and energy expenditure.

Setmelanotide Development Targets: Upstream Deficiencies Affecting the MC4R Pathway

AgRP, agouti-related protein; ARC, arcuate nucleus; LEPR, leptin receptor; MC4R, melanocortin-4 receptor; MSH, melanocyte-stimulating hormone;
NPY, neuropeptide Y; PCSK1, proprotein convertase subtilisin/kexin-type 1; POMC, proopiomelanocortin; PVN, paraventricular nucleus of
hypothalamus. Reference: Yazdi FT et al. PeerJ. 2015;3:e856.

We are focused on developing setmelanotide for genetic disorders that arise due to defects in this pathway that are
upstream of MC4R. With our expanding clinical development program, we plan to evaluate setmelanotide in Phase 2 and 3
trials for the treatment of obesity due to a deficiency in one of 36 genes associated with the MC4R pathway. Setmelanotide
has the potential to restore lost function in this pathway by activating the intact MC4R pathway below the genetic defect.
In this way, we believe setmelanotide acts as restorative therapy.

Epidemiology Estimates of Rare Genetic Diseases of the MC4R Pathway

While obesity is epidemic in the United States and elsewhere, we are focused on rare genetic diseases of obesity,
most often characterized by early-onset, severe obesity and unrelenting hunger or hyperphagia. Of the tens of millions of
obese individuals in the United States, we estimate that there are approximately 5 million individuals whose severe obesity
was early-onset, as the table below summarizes the indications currently approved or under active clinical investigation.

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including  our  clinical  epidemiology  estimates  based  on  the  literature  and  company  sequencing  data  for  the  addressable
patient populations within these indications.

Obesity due to POMC or PCSK1 deficiency

~100 – 500 U.S. patients

Obesity due to LEPR deficiency

~500 – 2,000 U.S. patients

Bardet-Biedl syndrome

Alström syndrome

POMC, PCSK1, or LEPR heterozygous deficiency
obesities; SRC1 and SH2B1 deficiency
obesities.

~1,500 - 2,500 U.S. patients

~500 U.S. patients

~100,000 – 200,000 U.S. patients

MC4R deficiency obesity

Smith-Magenis syndrome

~10,000* U.S. patients

~ 2,400** U.S. patients

These calculations rely on internal and proprietary sequencing data and assume a U.S. population of 327 million, of which 1.7% have early-onset, severe
obesity (Hales et al in JAMA – April 2018: Trends in Obesity and Severe Obesity Prevalence in US Youth and Adults by Sex and Age, 2007-2008 to
2015-2016); * Estimated prevalence of U.S. patients with rescuable variants of the MC4R; ** Published prevalence estimates of one in 25,000 in the
United States, and published prevalence estimates that approximately 10% of patients with Smith-Magenis syndrome have RAI1 variants that may affect
the MC4R pathway and 90% of patients with Smith-Magenis syndrome have 17p11.2 chromosomal deletions which also may affect the MC4R pathway,
of which approximately 67% and 13%, respectively, live with obesity.

We believe that the patient populations in the European Union are at least as large as those in the United States.
While  our  sequencing  data  include  patients  from  the  United  States  and  Europe,  we  do  not  have  comparable
epidemiological  data  from  the  European  Union  and  these  estimates  are  therefore  based  solely  on  applying  relative
population percentages to the Rhythm-derived estimates described above.

For patients with genetic forms of MC4R pathway deficiencies, the rarity and the genetic pathophysiology of our
target indications means that there is no comprehensive patient registry or other method of establishing with precision the
actual number of patients. As a result, we have had to rely on other available sources to derive clinical prevalence estimates
for our target indications. We recently updated our prevalence estimates in January 2021 based on sequencing data from
approximately 37,500 obese individuals and rates of response to setmelanotide in our exploratory Phase 2 Basket study.
Because  the  published  epidemiology  studies  for  these  genetic  deficiencies  are  based  on  relatively  small  population
samples, and are not amenable to robust statistical analyses, it is possible that these projections may significantly under- or
overestimate  the  addressable  population.  While  our  projected  estimates  of  the  aggregate  total  addressable  population
continues  to  expand  with  the  addition  of  new  genes,  the  addressable  population  faces  the  challenges  of  a  rare  disease
population.  The  disease  must  be  suspected  by  the  physician,  confirmed  by  genetic  testing  and  then  setmelanotide
responsiveness confirmed by a 12-16 week trial with the product candidate.  

Limitations of Current Therapies

Although  drugs  approved  for  general  obesity  can  potentially  be  used  in  obese  patients  with  MC4R  pathway
deficiencies,  all  have  limited  efficacy  and  aim  to  treat  symptoms  rather  than  addressing  the  underlying  biology.  Many
weight loss drugs interfere with normal physiologic function to induce weight loss.  For example, drugs which delay gastric
emptying  may  cause  a  patient  to  feel  full  and  eat  less,  but  are  also  often  associated  with  nausea  and  vomiting  as  a
consequence of the delayed emptying.  In the case of individuals with MC4R pathway deficiencies, these therapies also do
not specifically address the hunger which accompanies the MC4R deficiency.  Similarly, bariatric surgery which has been
shown to be quite effective in the general obese population, may be unsuccessful in the MC4R pathway deficient patient
for the same reason.  The stomach is smaller but the hunger drive persists and weight gain continues.  

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IMCIVREE™  (setmelanotide):  First-ever  Therapy  for  Chronic  Weight  Management  in  Adult  and  Pediatric
Patients  Six  Years  of  Age  and  Older  with  Obesity  Due  to  POMC,  PCSK1  or  LEPR  Deficiency  Confirmed  by
Genetic Testing  

On  November  27,  2020,  we  announced  that  the  FDA  approved  IMCIVREE  for  chronic  weight  management  in
adult and pediatric patients six years of age and older with obesity due to POMC, PCSK1 or LEPR deficiency confirmed
by genetic testing. With this approval, IMCIVREE became the first-ever FDA approved therapy for use in patients with
these  rare  genetic  diseases  of  obesity.  As  an  MC4  receptor  agonist,  IMCIVREE  is  designed  to  restore  impaired  MC4
receptor  pathway  activity  arising  due  to  genetic  deficits  upstream  of  the  MC4  receptor.  We  expect  to  make  IMCIVREE
commercially available to patients six years of age and older with obesity due to POMC, PCSK1 or LEPR deficiency in the
U.S. in the first quarter of 2021.

IMCIVREE  contains  setmelanotide  acetate,  a  melanocortin  4  (MC4)  receptor  agonist.  Setmelanotide  is  an  8
amino  acid  cyclic  peptide  analog  of  endogenous  melanocortin  peptide  α-MSH.  The  chemical  name  for  setmelanotide
acetate 
is  acetyl-L-arginyl-L-cysteinyl-D-alanyl-L-histidinyl-D-phenylalanyl-L-arginyl-L-tryptophanyl-L-cysteinamide
cyclic (2→8)-disulfide acetate. Its molecular formula is C49H68N18O9S2 (anhydrous, free-base), and molecular mass is
1117.3 Daltons (anhydrous, free-base).

The chemical structure of setmelanotide is:

IMCIVREE injection is a sterile, clear to slightly opalescent, colorless to slightly yellow solution. Each 1 mL of
IMCIVREE  contains  10  mg  of  setmelanotide  provided  as  setmelanotide  acetate,  which  is  a  salt  with  2  to  4  molar
equivalents of acetate, and the following inactive ingredients: 100 mg N-(carbonyl-methoxypolyethylene glycol 2000)-1,2-
distearoyl- glycero-3- phosphoethanolamine sodium salt, 8 mg carboxymethylcellulose sodium (average MWt 90,500), 11
mg mannitol, 5 mg phenol, 10 mg benzyl alcohol, 1 mg edetate disodium dihydrate, and Water for Injection. The pH of
IMCIVREE is 5 to 6.

Obesity due to POMC, PCSK1 or LEPR deficiency are ultra-rare diseases caused by variants in POMC, PCSK1 or
LEPR genes that impair the MC4 receptor pathway. People living with obesity due to POMC, PCSK1 or LEPR deficiency
struggle with extreme, insatiable hunger beginning at a young age, resulting in early-onset, severe obesity.

Obesity  due  to  POMC  or  PCSK1  deficiency  is  caused  by  the  loss  of  both  genetic  copies  of  either  the  gene  for
POMC  or  the  gene  for  PCSK1.  This  results  either  in  loss  of  POMC  neuropeptide  synthesis,  in  the  case  of  biallelic
(compound heterozygous and homozygous) deficiency in the POMC gene, or in disruption of the required processing of
the POMC neuropeptide product to MSH by the PCSK1 enzyme, in the case of biallelic deficiency in the PCSK1 gene. The
result of both of these two biallelic genetic defects is lack of MSH to bind and activate MC4R, ultimately leading to the
lack of stimulation of downstream MC4R neurons and causing severe, early-onset obesity and hyperphagia. POMC or

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PSCK1 biallelic deficiency may also be associated with hormonal deficiencies, such as hypoadrenalism, as well as red hair
and fair skin.

POMC/PCSK1 deficiency is characterized by voracious infant feeding, rapid weight gain and severe obesity, often
in  early  infancy,  with  patients  demonstrating  remarkable  weight  increases  many  standard  deviations  from  the  normal
weight  growth  curves.  These  patients  and  their  caregivers  have  attempted  to  stabilize  body  weight  with  the  help  of
psychologists, nutritionists and pediatric endocrinologists, all without significant success.

Obesity due to LEPR deficiency is an ultra-rare genetic disease that causes hyperphagia and severe, early-onset
obesity. Leptin’s role in obesity has been elucidated by characterization of severely obese people with biallelic mutations
that impair the activity of leptin, including disruption of signaling at the LEPR, known as LEPR deficiency obesity. Under
normal conditions, leptin can activate POMC neurons and the downstream MC4R, but like other deficiencies upstream in
the MC4R pathway, lack of signaling at LEPR results in loss of function in the MC4R pathway.

Pivotal Phase 3 Clinical Trials Evaluating Setmelanotide in POMC and LEPR Deficiency Obesities

We assessed the safety and efficacy of IMCIVREE in two pivotal trials that were identically designed: one-year,
open-label  studies,  each  with  an  eight-week,  double-blind  withdrawal  period.  The  studies  enrolled  patients  with
homozygous or presumed compound heterozygous pathogenic, likely pathogenic variants, or VUS, for either the POMC,
PCSK1  or  LEPR  gene.  In  both  studies,  adult  patients  had  a  body  mass  index  (BMI)  of  ≥30  kg/m2.  Weight  in  pediatric
patients was ≥95th percentile using growth chart assessments.

Efficacy analyses were conducted in 21 patients who had completed at least one year of treatment at the time of a
pre-specified data cutoff. Of the 21 patients included in the efficacy analysis in both pivotal studies, 62 percent were adults
and 38 percent were aged 16 years or younger. In Study 1, 50 percent of patients were female, 70 percent were White, and
the median BMI was 40.0 kg/m2 (range: 26.6-53.3) at baseline. In Study 2, 73 percent of patients were female, 91 percent
were White, and the median BMI was 46.6 kg/m2 (range: 35.8-64.6) at baseline.

In  the  POMC/PCSK1  study,  80  percent  of  patients  with  obesity  due  to  POMC  or  PCSK1  deficiency  met  the
primary endpoint, achieving a ≥10 percent weight loss after one year of treatment with IMCIVREE. In the LEPR study, 46
percent of patients with obesity due to LEPR deficiency achieved a ≥10 percent weight loss after 1 year of treatment with
IMCIVREE.

Proportion of Patients Achieving at Least 10 percent Weight Loss from Baseline at 1 Year in Study 1 and Study 2

Parameter

Patients Achieving at Least 10% Weight Loss at
Year 1

Statistic

n (%)

95% CI1

P-value2

Study 1 (POMC)
(N=10)

Study 2 (LEPR)
(N=11)

8 (80.0%)

5 (45.5%)

(44.4%, 97.5%)

(16.8%, 76.6%)

<0.0001

0.0002

Note: The analysis set includes patients who received at least 1 dose of study drug and had at least 1 baseline assessment.
1 From the Clopper-Pearson (exact) method
2 Testing the null hypothesis: Proportion =5%

Percent Change from Baseline in Weight at 1 Year in Studies 1 and 2 (Full Analysis Set)

Parameter

Baseline Body Weight (kg)

Study 1 (POMC)
(N=10)

Study 2 (LEPR)
(N=11)

118.7 (37.5)

115.0

55.9, 186.7

133.3 (26.0)

132.3

89.4, 170.4

Statistic

Mean (SD)

Median

Min, Max

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Parameter

1-Year Body Weight (kg)

Percent Change from Baseline to 1 Year (%)

Statistic

Mean (SD)

Median

Min, Max

Mean (SD)

Median

Min, Max
LS Mean1
95% CI1
P-value2

Study 1 (POMC)
(N=10)

Study 2 (LEPR)
(N=11)

89.8 (29.4)

84.1

54.5, 150.5

-23.1 (12.1)

-26.7

-35.6, -1.2

-23.12

(-31.9, -14.4)

0.0003

119.2 (27.0)

120.3

81.7, 149.9

-9.7 (8.8)

-9.8

-23.3, 0.1

-9.65

(-16.0, -3.3)

0.0074

Note: This analysis includes patients who received at least 1 dose of study drug, had at least 1 baseline assessment.
1 ANCOVA model containing baseline body weight as a covariate
2 Testing the null hypothesis: mean percent change=0

When  treatment  with  IMCIVREE  was  withdrawn  in  the  16  patients  who  had  lost  at  least  5  kg  (or  5  percent  of
body weight if baseline body weight was <100 kg) during the 10-week open-label period, these patients gained an average
of 5.5 kg in Study 1 and 5.0 kg in Study 2 over 4 weeks. Re-initiation of treatment with IMCIVREE resulted in subsequent
weight loss.

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Mean Percent Change in Body Weight from Baseline by Visit (Study 1 [N=9] and Study 2 [N=7])

BL=Baseline (day of first dose)
V2 to V3 = variable dose titration period (2 to 12 weeks)
V3 to V6 = 10-week open-label treatment period
V6 to V8 = 8-week placebo withdrawal period (4 weeks active, 4 weeks placebo)
V8 to V12 = 32-week open-label treatment period
FV = Final visit; time point for primary efficacy analysis
Note: This figure includes patients who had lost at least 5 kg (or 5% of body weight if baseline body weight was
<100 kg) during the 10-week open-label period.

Additionally, as of April 16, 2020,  a total of 15 patients who participated in the pivotal studies were being treated
in our long-term extension study, including nine with POMC deficiency obesity and six with LEPR deficiency obesity, all
of whom previously completed one of our two pivotal Phase 3 trials evaluating setmelanotide for the treatment of severe
obesity and insatiable hunger. As of that date, extension study data showed durable weight loss with long-term treatment
with setmelanotide for a total of up to 155 weeks. Hunger scores have typically remained stable throughout the extension
study. Treatment in the extension study remains ongoing, and as of November 16, 2020, 12 of 15 eligible POMC patients
and 12 of 15 eligible LEPR patients had been enrolled in the long-term extension study.  

Also as of April 16, 2020, we had enrolled a total of eight patients, including four pediatric patients between the
ages 6 and 12 years old, in supplemental cohorts in these Phase 3 trials for POMC deficiency obesity and LEPR deficiency
obesity,  with  four  supplemental  patients  enrolled  in  each  trial.  All  eight  supplemental  patients  achieved  the  primary
endpoint of 10 percent or greater weight loss at 52 weeks on setmelanotide therapy, as calculated under the same statistical
analysis plan used in the pivotal trials. All of the supplemental patients were enrolled by European investigators, as were
most  of  the  patients  in  the  pivotal  cohorts.  The  mean  reduction  in  baseline  body  weight  for  the  supplemental  POMC
deficiency  obesity  patients  was  -26.3  percent,  and  the  mean  reduction  in  body  weight  for  the  supplemental  LEPR
deficiency obesity patients was -13.2 percent. The estimated mean percentage reduction in most hunger score for evaluable
patients  in  the  supplemental  cohorts  was  -57.3  percent.  Hunger  scores  collected  from  children  younger  than  12  were
calculated differently and therefore not counted in this analysis. Combining data from the eight supplemental patients with
data  from  the  pivotal  cohorts,  12  out  of  14  patients  with  POMC  deficiency  obesity  and  9  out  of  15  patients  with  LEPR
deficiency  obesity  achieved  the  primary  endpoints  of  greater  than  10  percent  weight  loss  over  approximately  one  year.
Additionally, the data for all key secondary endpoints from the supplemental cohorts were consistent with the data from the
pivotal cohorts.

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EU Regulatory Path

Our MAA seeking approval for setmelanotide the treatment of obesity and the control of hunger associated with
confirmed  biallelic  pro-opiomelanocortin  (POMC),  including  PCSK1,  deficiency  obesity  or  confirmed  biallelic  leptin
receptor (LEPR) deficiency obesity in adults and children 6 years of age and above is currently under review by the EMA,
having  been  submitted  in  June  2020.  The  EMA  has  previously  granted  PRIority  MEdicines  (PRIME)  designation  for
setmelanotide  for  the  treatment  of  obesity  and  the  control  of  hunger  associated  with  deficiency  diseases  of  the  MC4
receptor pathway. 

Commercial Availability

We  are  focused  on  making  IMCIVREE  available  globally  as  we  build  an  infrastructure  to  bring  this  precision
therapy  to  patients  with  obesity  due  to  POMC,  PCSK1  or  LEPR  deficiency.  We  aim  to  ensure  a  positive  experience  for
patients, caregivers and prescribing physicians, and delivering on that promise with an efficient scalable model. We expect
IMCIVREE  to  be  commercially  available  in  the  United  States  in  the  first  quarter  of  2021.  We  will  achieve  this  through
efforts in partnership with our specialty pharmacy, which will serve as the primary point of contact for patients and health
care  providers,  or  HCPs.  We  are  committed  to  providing  comprehensive  patient  support  offerings  and  will  provide
additional  details  on  our  patient  support  program  when  IMCIVREE  becomes  commercially  available.  We  believe  these
activities will also lay the groundwork for future potential launches while ensuring ongoing seamless support to patients
within our current approval.

We  are  working  with  the  broader  community  of  physicians,  patients  and  families  to  improve  the  path  to  an
accurate  diagnosis.  Patient  identification  is  a  core  focus  of  our  cross-functional  teams.  We  support  disease  education
through our medical and commercial team efforts. Our medical field team consists of 10 medical science liaisons and eight
disease  education  liaisons  who  have  reached  out  to  hundreds  of  HCPs  to  educate  them  on  the  MC4R  pathway  and  the
underlying  genetics  that  may  lead  to  obesity.  We  have  supplemented  these  one-on-one  interactions  with  engagement  of
HCPs  through  our  GOLD  Academy  program.  The  commercial  team  also  supports  disease  education  with  non-personal
promotion activities to reach a larger group of HCPs and patients, who may access additional educational information on
our website addressing rare genetic diseases of obesity awareness (www.leadforrareobesity.com). Once an HCP suspects a
patient may have a genetic cause for their obesity, we will make available our free Uncovering Rare Obesity (URO) testing
program,  which  screens  a  panel  of  genes  involved  in  the  MC4R  pathway.  The  URO  testing  program  supports  the
identification of patients eligible within the indications on the IMCIVREE label, as well as other genes of interest to us,
including BBS, Alström, and genes expected to be included in our expanded Phase 2 Basket Study.

In  addition  to  having  disease  education  and  testing  initiatives,  we  have  patient  support  programs  in  place  to
provide support to patients, including genetic counseling, reimbursement support inclusive of co-pay and patient assistance
programs, and IMCIVREE injection training.

Although the total number of patients potentially addressable by setmelanotide may not be so rare, individually
populations with each of these MC4R pathway-related genetic defects are rare and affected patients face many of the same
challenges  as  any  classically  rare  patient  population.    There  is  little  or  no  awareness  about  these  rare  genetic  diseases
obesity, and the patients suffering from them are lost in the health care system, with limited educational resources and  no
effective  treatments  for  their  condition.  All  of  our  efforts  and  services  described  above  are  designed  to  address  the
challenges of rare diseases and lay the groundwork for potential future launches, with a focus on scalability .

Development of Setmelanotide for Additional Indications

BBS and Alström Syndrome

Bardet-Biedl Syndrome

Bardet-Biedl syndrome is a life-threatening, ultra-rare orphan disease. BBS is a monogenic disorder that causes
severe obesity and hyperphagia as well as vision loss, polydactyly, kidney abnormalities, and other signs and symptoms.
For BBS patients, hyperphagia and obesity can have significant health consequences. BBS is part of a class of disorders

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called  ciliopathies,  or  disorders  associated  with  the  impairment  of  cilia  function  in  cells.  Cilia  are  hair-like  cellular
projections that play a fundamental role in the regulation of several biological processes, including satiety signaling. Cilia
dysfunction  in  the  hypothalamus  is  thought  to  contribute  to  hyperphagia  and  obesity  in  BBS.  BBS  is  a  genetically
heterogeneous disease that is caused by as many as 21 separate Bardet-Biedl loci defects that result in a similar syndrome.
Recent  scientific  studies  identify  deficiencies  affecting  the  MC4R  pathway  as  a  potential  cause  of  the  obesity  and
hyperphagia associated with BBS and demonstrate that an MC4R agonist can directly impact these symptoms. Currently
there are no approved or effective therapies for BBS.

In  December  2020,  we  reported  positive  topline  results  from  our  pivotal  Phase  3  clinical  trial  evaluating
setmelanotide for the treatment of insatiable hunger and severe obesity in individuals with BBS or Alström syndrome. The
combined pivotal, Phase 3 trial is a multinational, open-label, single-arm study consisting of 52 weeks of treatment with
setmelanotide.  Participants  were  blinded  and  randomized  for  the  first  14  weeks  of  the  trial  to  receive  either  placebo  or
setmelanotide therapy. Those participants who began the trial on setmelanotide continued therapy for a total of 52 weeks,
while  those  on  placebo  went  on  to  receive  52  weeks  of  setmelanotide  therapy  after  completion  of  the  14-week  placebo
period.  All patients were obese, defined as BMI ≥30 kg/m2 for patients ≥16 years of age or weight >97th percentile for age
and sex on growth chart assessment for patients 6 to 15 years of age. Based on the statistical analysis plan, the primary
analysis was completed for 28 of the 31 patients who reached or exceeded 52 weeks on setmelanotide therapy, as well as
three patients who were randomized to the placebo group during the 14-week double-blind period, who had not yet reached
52 weeks on therapy.  The study met its primary and all key secondary endpoints, demonstrating statistically significant
and clinically meaningful reductions in weight and hunger scores, with patients with BBS comprising all primary endpoint
responders. No patients with Alström syndrome met the primary endpoint.  The analysis of the primary endpoint showed
that 11 of 31 (34.5 percent) of participants achieved the primary endpoint of at least 10 percent reduction in body weight
from baseline at approximately 52 weeks of therapy (p=0.0024), 11 of 28 patients with BBS achieved 10 percent reduction
in body weight, and 0 of 3 patients with Alström syndrome achieved 10 percent reduction in body weight. The analysis of
the key secondary endpoints showed that mean reduction from baseline in body weight was -6.2 percent (p<0.0001), mean
reduction from baseline in most hunger rating was -30.8 percent (p<0.0001) and 60.2 percent of participants achieved at
least 25 percent reduction in most hunger scores from baseline at approximately 52 weeks of therapy (p<0.0001).

We  believe  the  inclusion  of  adolescents  in  the  primary  analysis  confounded  the  weight  analysis  as  they
represented  approximately  half  of  the  patients  and  were  still  growing.    Of  the  28  BBS  patients  included  in  the  primary
analysis set, 15 of them were adults, age 18 or older, and 13 were adolescents. Looking at adults only, 11 out of 15 or 73
percent had greater than 5 percent weight loss. And 8 out of 15 or 53 percent had greater than 10 percent weight loss.

We  believe  this  distinction  between  adults  and  adolescents  is  important  because  children  and  adolescents  are
growing  in  height  and  increasing  bone  mass  and  therefore  would  be  expected  to  gain  weight.  On  January  26,  2021,  we
shared  data  from  a  predefined  exploratory  endpoint  showing  the  impact  of  setmelanotide  on  BMI-Z  scores  for  patients
younger  than  18  years  old  with  BBS.  The  BMI-Z  score,  or  BMI  standard  deviation  score,  represents  the  number  of
standard deviations from median BMI by child age and sex. Setmelanotide was associated with statistically significant and
clinically meaningful reductions in BMI-Z scores in patients with BBS. In 16 patients younger than 18 with BBS, the mean
BMI-Z score was reduced from 3.74 at baseline to 2.98 for a reduction of -0.76, or -24.5 percent (p=0.0006).

Consistent  with  prior  clinical  experience,  setmelanotide  was  generally  well  tolerated,  there  were  no  serious
adverse  events,  or  SAEs,  related  to  treatment  with  setmelanotide  and  the  safety  results  were  consistent  with  previous
setmelanotide  clinical  trials.  Eight  patients  discontinued  from  study  drug  treatment  during  the  trial,  five  due  to  adverse
events, or AEs (one on placebo at the time), and three for other reasons (one on placebo at the time).

We are continuing to follow patients with BBS who are severely obese and enrolled in our Phase 2 trial.  Results
from  this  Phase  2  trial  demonstrate  that  treatment  with  setmelanotide  led  to  marked  reductions  in  body  weight  and
decreased appetite as shown by lower hunger scores. The results of this study were published in an article entitled, “Effect
of  Setmelanotide,  an  MC4R  Agonist,  on  Obesity  in  Bardet-Biedl  Syndrome,”  in  July  2020  in  the  peer-reviewed  journal
Diabetes,  Obesity  and  Metabolism.  Previously,  we  reported  in  September  2019  that  six  of  the  nine  patients  showed
clinically important, marked weight loss. In the second quarter of 2018, the FDA agreed to include BBS under our existing
Breakthrough Therapy designation for setmelanotide.

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We  anticipate  completion  of  regulatory  submissions  to  both  the  FDA  and  the  EMA  seeking  marketing

authorization for setmelanotide for the treatment of obesity in patient with BBS in the second half of 2021.

Alström Syndrome

Alström syndrome is a life-threatening, ultra-rare orphan disease. It is a monogenic disorder that causes childhood
obesity and hyperphagia as well as progressive vision loss, deafness, cardiomegaly, insulin resistance and other signs and
symptoms.  Variable  features  include  short  stature,  cardiomyopathy,  and  progressive  lung,  liver,  and  kidney  dysfunction.
Symptoms of Alström syndrome first appear in infancy, and progressive development of multi-organ pathology leads to a
reduced life expectancy, with survival rare beyond the age of 50.

Alström  syndrome  shares  many  clinical  features  with  BBS,  including  obesity  and  hyperphagia,  and  is  also
characterized by progressive vision loss, deafness, congestive heart failure, hyperinsulinemia and type 2 diabetes mellitus.
Similarly,  Alström  syndrome  is  a  ciliopathy  caused  by  mutations  in  the  ALMS1  gene,  which  has  also  been  shown  to  be
important for cilia function. Like BBS, recent scientific studies identify genetic deficiencies affecting the MC4R signaling
pathway as a potential cause of the obesity and hyperphagia associated with Alström syndrome. Studies in a mouse model
of Alström syndrome show a reduction in the number of cilia in specific neurons in the hypothalamus that are critical for
MC4R  pathway  signaling.  While  Alström  syndrome  is  less  well  studied  than  BBS,  the  similar  pathophysiology  of  cilia
dysfunction  and  clinical  presentation  support  that  deficiencies  in  the  MC4R  pathway  are  implicated  in  the  obesity  and
hyperphagia observed in Alström syndrome. Therefore, we hypothesize that setmelanotide treatment can be applied to treat
Alström syndrome.

We are studying Alström syndrome patients who are severely obese. As stated above, our Phase 3 study included
three patients with Alström syndrome in the primary analysis and none of them met the primary endpoint. However, there
were signals of potential efficacy in some patients, and we are exploring further these phase 3 data. One pediatric patient
with Alström syndrome lost 8 percent of body weight in the pivotal trial. In our Phase 2 trial, we had enrolled four patients
with Alström syndrome. One of those patients, a 12-year-old male, lost 25 percent of body weight, and another patient who
achieved and maintained 6 percent weight loss also saw her HbA1c decrease by 3 percent from 11 percent to 8 percent.

We are evaluating next steps for setmelanotide for the potential treatment of patients with Alström syndrome.

Community-building efforts for BBS and Alström Syndrome

The  ongoing  efforts  outlined  to  support  the  POMC,  PCSK1  and  LEPR  launch  lay  the  foundation  for  future
commercialization  efforts,  including  potential  for  BBS  and  Alström  if  setmelanotide  is  ultimately  approved  in  these
indications.  All  disease  education  efforts  supporting  awareness  of  rare  genetic  diseases  of  obesity  and  testing  will  also
uncover BBS and Alström patients. In addition, compared to POMC, PCSK1 and LEPR, BBS and Alström are syndromic
diseases  where  patients  suffer  from  multiple  symptoms  beyond  early-onset  obesity  and  hyperphagia.  This  allows  for  a
tailored  approach  to  disease  education  efforts  to  differentiate  individuals  with  BBS  and  Alström  syndrome  from  the
broader general obese population.

Initial primary and secondary market research has been conducted to understand the patient journey to diagnosis
and treatment and the HCPs involved in the diagnosis and management of individuals with BBS and Alström syndrome.
This research demonstrates there is still a need to decrease the time to diagnosis and increase awareness of these diseases,
particularly education around how the underlying pathology causing obesity in BBS and Alström Syndrome differs from
common  obesity.  Currently  HCPs  often  treat  the  obesity  and  hyperphagia  with  traditional  obesity  management  practices
that  frequently  prove  insufficient,  leading  to  inadequate  improvements  and  frustration  for  diagnosed  individuals.    We
continue to advance our education and community building efforts as we make progress against these unmet needs in the
community through engagements with existing HCP treaters, diagnosers, referrers, along with patient advocacy groups.

  We  continue  to  hone  our  understanding  of  the  number  of  diagnosed  individuals,  while  supporting  additional
patient identification. An ongoing assessment of the market will guide decisions around future headcount needs to support
the  launch  in  BBS/AS,  whether  from  a  field  perspective  or  to  supplement  our  existing  patients  and  customer  support
services.

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Additional MC4R Pathway Genetic Deficiencies: HETs, SRC1 and SH2B1

We are actively working to broaden the indication for setmelanotide to treat individuals with additional genetic
deficiencies related to the MC4R pathway through our clinical development program. We anticipate initiating a Phase 3,
potentially registration-enabling study in the second half of 2021 to evaluate setmelanotide in patients with MC4R pathway
deficiencies due to a variant in one of the two alleles in the POMC, PCSK1, or LEPR genes, or HET obesity, as well as the
SRC1 and SH2B1 genes. In addition, we plan to initiate an expanded Phase 2 Basket Study to evaluate setmelanotide for
the treatment of obesity due to a deficiency in one of 31 additional genes associated with the MC4R pathway.

POMC, PCSK1 or LEPR heterozygous deficiency obesity

POMC, PCSK1 and LEPR are core genes of the MC4R pathway. Heterozygous variants in POMC, PCSK1 and
LEPR have been associated with clinical obesity that may be due to a MC4R pathway dysfunction. The epidemiology and
clinical characterization POMC, PCSK1, or LEPR heterozygosity obesity, or HET obesity, is not well understood. We are
studying  patients  who  are  severely  obese  and  who  carry  a  heterozygous  variant  of  the  POMC,  LEPR,  or  PCSK1  gene.
These patients have a genetic variant that may result in MC4R pathway dysfunction.

SRC1 deficiency obesity

SRC1  deficiency  obesity  is  a  rare  genetic  disorder  that  is  characterized  by  early-onset  severe  obesity  and
hyperphagia.  The  first  academic  paper  describing  SRC1  deficiency  obesity,  titled,  “Steroid  receptor  coactivator-1
modulates the function of POMC neurons and energy homeostasis” (Yang et al 2019, Nat Comm. 10, Article 1718) was
published in 2019 in Nature Communications. In this paper, the authors described how SRC1 variants found in severely
obese cases significantly impaired leptin-induced POMC expression. SRC1 deficiency obesity is an autosomal dominant
disorder, meaning that heterozygote loss of the SRC1 gene (just one gene copy) can be sufficient to give rise to obesity and
hyperphagia.  Specifically,  SRC1  is  a  transcriptional  coactivator  that  has  links  to  both  the  leptin  receptor  and  to  POMC.
When the leptin receptor is activated, SRC1 through a cascade of events itself is activated and then goes on to drive the
expression  of  POMC,  such  that  in  individuals  who  have  heterozygote  mutations  in  their  SRC1  genes,  there  can  be
insufficient  leptin  receptor  activation  of  the  MC4  receptor  pathway  as  a  result  of  decreased  POMC  expression,  which
decreases the amount of available MSH to reactivate the MC4 receptor, consequentially resulting pathway dysfunction that
drives the hyperphagia and obesity in these individuals.

SH2B1 deficiency obesity

SH2B1  deficiency  obesity  is  a  rare  genetic  disorder  that  is  characterized  by  early-onset  severe  obesity,
hyperphagia and hyperinsulinemia. In addition to early-onset severe obesity and hyperphagia, other clinical characteristics
associated with SH2B1 deficiency obesity are insulin resistance and reduced final height. Deficiency in SH2B1 can arise
through either DNA variants in the SH2B1 gene or through chromosomal deletions (chromosome 16) that encompass the
SH2B1 gene. In both cases, dysfunction/loss of only one copy of the SH2B1 gene is sufficient to give rise to obesity and
hyperphagia.  The  SH2B1  protein  has  been  shown  to  have  direct  links  to  the  MC4R-pathway.  Specifically,  SH2B1  is  an
adapter protein that amplifies the signal coming through the leptin receptor. In individuals who carry heterozygote loss of
function mutations in SH2B1 or a chromosomal deletion that remove the SH2B1 from the chromosome, individuals may
have insufficient leptin receptor activity activation of their MC4R pathway. This gives rise to a well-documented form of
severe early-onset obesity and hyperphagia.

Proof of concept achieved in HET obesity and obesity due to SRC1 or SH2B1 deficiencies

Our  ongoing  Phase  2  Basket  Study  is  an  open  label  study  designed  to  evaluate  setmelanotide  in  obese  patients
  whose  Body  Mass  Index  (BMI)  ≥  30  kg/m2  for  patients  16  years  of  age  or  older  or  BMI≥  95th  percentile  for  age  and
gender for patients between 6 and 16 years old. Patients were stratified by cohort according to their genetic defect (i.e.,
HETs, SRC1 or SH2B1, or others). On Jan. 26, 2021, we  announced proof-of-concept interim data from this study in HET
obesity, obesity due to SRC1 deficiency; and obesity due to SH2B1 deficiency. The primary endpoint of the study is the
percent of patients in each subgroup showing at least a 5 percent loss of body weight over three months.

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HET Obesity (POMC, LEPR, PCSK1) highlights included, as of a cutoff of December 17, 2020:

● Overall,  12  of  35  patients  (34.3  percent)  achieved  the  primary  endpoint.  This  full  analysis  includes  six

patients who withdrew early;

● Mean reduction from baseline in body weight across all 35 patients was -3.7 percent, which includes both

clinical responders and non-responders; and

● Among  the  12  patients  who  achieved  the  primary  endpoint  (responder  group),  the  mean  reduction  from

baseline in body weight was -10.1 percent.

In our analyses, we are applying variant classification guidelines from the American College of Medical Genetics,
or ACMG (as described in Richards, et al., 2015), to patient cohort stratification. Specific variants of the POMC, LEPR,
PCSK1, SRC1 or SH2B1 gene may be classified based published data as being pathogenic, likely pathogenic, likely benign
or benign, or classified as a variant of unknown significance or VOUS. As genetics of obesity remains an emerging field,
the vast majority of variants in genes associated with the MC4R pathway as classified as VOUS. Our hypothesis was that
patients with genetic variants that indicate a higher degree of pathogenicity would be more likely to have impaired pathway
signaling and therefore more likely to respond to setmelanotide.  In addition, we decided to study a cohort of patients with
an N221D variant of the PCSK1 gene.  This is a common variant which has been associated with obesity in scientific and
medical literature.

● Patients  with  HET  obesity  were  stratified  into  three  pre-specified  cohorts  by  classification  of  their  genetic

variants according to ACMG guidelines;

● Four of eight patients (50.0 percent) with a pathogenic or likely pathogenic variant achieved greater than 5

percent weight loss;

● Four  of  eight  patients  (50.0  percent)  with  the  N221D  variant  of  the  PCSK1  gene  achieved  greater  than  5

percent weight loss; and

● Four of 19 patients (21.1 percent) with a variant of unknown significance (VOUS) achieved greater than 5

percent weight loss.

Data from the SRC1 and SH2B1 cohorts were based on an interim analysis of patients who completed 12 weeks
of therapy. This analysis did not include 15 patients who withdrew early due to COVID-related issues, adverse events or
were  lost  to  follow-up.  Also  not  included  were  data  from  12  patients  who  remained  on  trial  but  had  not  yet  reached  12
weeks of therapy as of December 17, 2020.

Obesity due to SRC1 deficiency highlights included, as of a cutoff date of December 17, 2020:

● Four of 13 patients (30.8 percent) achieved the primary endpoint;

● Mean reduction from baseline in body weight across all 13 patients was -3.7 percent, which included both

clinical responders and non-responders; and

● Among  the  four  patients  who  achieved  the  primary  endpoint  (responder  group)  the  mean  reduction  from

baseline in body weight was -8.4 percent.

Obesity due to SH2B1 deficiency highlights included, as of a cutoff date of December 17, 2020:

● Nine of 17 patients (52.9 percent) achieved greater than 5 percent weight loss over 12 weeks of therapy;

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● Mean reduction from baseline in body weight across all 17 patients was -3.9 percent, which included clinical

responders and non-responders; and

● Among  the  nine  patients  who  achieved  the  primary  endpoint  (responder  group),  the  mean  reduction  from

baseline in body weight was -7.1 percent.

Consistent with prior clinical experience, setmelanotide was generally well tolerated in each of these rare genetic
diseases of obesity as of the cutoff date. The most common treatment-emergent adverse events, or TEAEs, included mild
injection site reactions, hyperpigmentation, and nausea and vomiting, which occurred early in the treatment course. There
were no SAEs related to treatment with setmelanotide.

We  are  in  discussions  with  the  FDA  to  define  a  potential  path  for  setmelanotide  towards  registration  for  these
indications. Pending the outcome of these discussions, we plan to initiate a pivotal Phase 3 trial evaluating setmelanotide in
patients with HET obesity and SRC1 and SH2B1 deficiency obesities in the second half of 2021.

MC4 Receptor Deficiency Obesity

In the first half of 2021, we anticipate reporting interim data from ongoing Phase 2 basket  trial from a cohort of
patients with MC4R deficiency obesity arising due to heterozygote loss of function mutations in the MC4 receptor gene
itself.  This  is  one  of  the  most  well-known  and  prevalent  forms  of  monogenic  severe  early-onset  obesity.  Based  on  a
comprehensive ongoing biochemical screening study, we believe setmelanotide may have the potential to address MC4R
loss of function in a defined subset of this broader population, specifically individuals who carry MC4R loss of function
variants  that  can  be  rescued  by  setmelanotide  (e.g.  are  not  responsive  to  the  endogenous  ligand  MSH,  but  do  respond
normally to setmelanotide.

Smith-Magenis Syndrome

In addition, we are studying setmelanotide for the treatment of obesity in patients with Smith-Magenis syndrome,
  a  developmental  disorder  that  affects  many  parts  of  the  body.  The  major  features  of  this  condition  include  mild  to
moderate  intellectual  disability,  delayed  speech  and  language  skills,  distinctive  facial  features,  sleep  disturbances,
behavioral  problems,  and  in  some  cases,  adolescent-onset  obesity  and  hyperphagia.  It  arises  due  to  loss  of  function
mutations  or  chromosomal  deletions  that  ablate  the  function  of  a  gene  called  RAI1.  RAI1  is  a  transcription  factor  that's
been  shown  to  affect  the  expression  of  several  MC4  receptor  pathway  genes,  including  POMC  itself.  As  a  result,  we
believe that hyperphagia and obesity found with Smith-Magenis syndrome is likely caused by an overall decrease in the
activity of the MC4 receptor pathway. We are continuing to enroll patients in this cohort.

Additional Planned Phase 2 Studies

Expanded Phase 2 MC4R Pathway Basket Study

Leveraging our extensive scientific expertise and years of internal research, we have developed a process that
allows us to identify new genes that we believe may be responsive to setmelanotide. Through this proprietary gene curation
and  selection  strategy  specifically  designed  to  evaluate  a  gene’s  relevance  to  the  MC4R  pathway,  we  have  identified  an
additional 31 MC4R pathway genes with “strong” or “very strong” pathway relevance, which we plan to evaluate in an
expanded Phase 2 Basket Study. Similar to our ongoing exploratory Phase 2 Basket Study, we will look to enroll patients
with early-onset, severe obesity with a body mass index (BMI) ≥40 kg/m2 with a confirmed genetic variant of one of these
31  genes.  We  expect  that  patient  identified  for  this  study  will  be  screened,  stratified  into  cohorts  by  gene  and  receive
setmelanotide therapy over 12 to 16 weeks. We expect to finalize this study design and initiate this trial in the second half
of 2021.

Hypothalamic Obesity

Hypothalamic obesity, or HO, is a severe obesity that arises from mechanical hypothalamic insults. Lesions of

the hypothalamus can derive from various types of tumors (e.g., craniopharyngiomas, gliomas, pituitary adenomas,

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hamartomas)  or  may  be  caused  by  surgeries  and  radiotherapies  for  the  treatment  of  these  same  tumor  types.  These
hypothalamic lesions, whether caused by the tumor itself and/or the treatment of the tumor, can disrupt the MC4R pathway.
Moreover, patients with HO display high degree of hyperleptinemia and hyperinsulinemia. Alpha-melanocortin stimulating
hormone (MSH) can be detectable in blood, and its levels can change depending on different energy states; however, in
patients with craniopharyngioma or post-surgical treatment for it, α-MSH levels are significantly reduced. Reduced serum
α-MSH levels may suggest melanocortin pathway deficiency, which might explain obesity in these patients.

We plan to conduct a Phase 2, multi-center, open-label, proof of concept study designed to assess the effect of
setmelanotide on weight loss on a population affected by HO. Approximately 15 subjects aged 6 to 28 years, inclusive, are
planned to be enrolled across approximately 3-5 clinical sites in the United States. We expect that patients will be treated
with  setmelanotide  for  16  weeks,  with  the  primary  endpoint  being  the  percentage  of  subjects  aged  >12  years  with  ≥5
percent body weight loss from baseline compared to a historic control of <5 percent in this subject population. All enrolled
patients  will  be  obese,  defined  as  a  BMI  ≥35  kg/m2  for  subjects  ≥16  years  of  age  or  BMI  ≥99th  percentile  for  age  and
gender for subjects 6 to <16 years of age based on the U.S. Centers for Disease Control and Prevention criteria.

Weekly Formulation of Setmelanotide

In collaboration with Camurus AB, or Camurus, we have developed a once weekly, long-acting formulation using
FluidCrystal®  technology.  When  injected  subcutaneously,  aqueous  body  fluid  is  absorbed  by  the  excipient  lipid  phase
which forms a gel-like depot consisting of liquid crystals formed in situ leading to slow diffusion of setmelanotide from the
depot. We believe that this formulation may be more convenient and less burdensome for patients and their families.

In November 2020, we presented interim results from a Phase 2 study evaluating a once-weekly formulation of
setmelanotide in healthy obese volunteers. The data showed that, as of a cutoff date of April 17, 2020, healthy obese people
treated  with  the  weekly  formulation  of  setmelanotide  achieved  comparable  weight  loss  to  those  treated  with  the  daily
formulation and that both weekly and daily formulations of setmelanotide were observed to be generally well tolerated. A
total of 85 individuals were included in the interim data analysis: 28 individuals were treated with weekly setmelanotide
without titration for 12 weeks (10mg, 20mg or 30mg doses); 20 individuals were treated with weekly setmelanotide with
titration (10mg for one week, followed by 20mg for 11 weeks or 20mg for one week, followed by 30mg for 11 weeks); 13
individuals were treated with daily setmelanotide (2mg daily for one week, followed by 3mg daily for 11 weeks); and 24
individuals were treated with placebo for 12 weeks.

We plan to discuss our development plans with the FDA and EMA in the first half of 2021 and anticipate dosing

the first patient in our planned once-weekly clinical trial in late 2021.

These interim data showed that, as of the cutoff date of April 17, 2020, the weight and hunger score changes in
individuals who received the weekly formulation were generally comparable to the score changes observed in individuals
who received the daily formulation. Notably, the weight and hunger score changes in healthy obese individuals receiving
both  formulations  were  lower  than  those  reported  separately  in  patients  with  rare  genetic  obesities  associated  with  an
impaired MC4R pathway who received setmelanotide. We believe the interim results from this study reinforces the position
that  setmelanotide  is  a  precision  medicine  targeted  at  patients  with  deficits  in  the  MC4R  pathway.  Additionally,
 pharmacokinetic, or PK, analyses showed similar trough drug concentrations for the daily and weekly formulations over
the  duration  of  therapy.  The  weekly  formulation  of  setmelanotide  demonstrated  a  consistent  24-hour  PK  range  and  was
detected  steadily  over  one  week,  with  a  trough  concentration  consistent  with  the  trough  concentration  of  the  daily
formulation.

As of the data cutoff of April 17, 2020, weekly setmelanotide administration was generally well tolerated, with no
serious TEAEs, and the safety results were similar to the daily administration and consistent with prior clinical experience.
The most commonly reported TEAEs, rates of which were generally similar between individuals treated with the weekly
and daily formulations, included injection site reaction, hyperpigmentation, nausea, headache and vomiting.

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Safety and Tolerability Results

Historically,  clinical  data  with  other  MC4R  therapies  suggested  that  MC4R-mediated  side  effects  may  include
changes in blood pressure and heart rate, increased erections in males, changes in libido and sexual function in females and
nausea and vomiting. As a result, primarily due to concerns about blood pressure and heart rate changes, we are not aware
of any other MC4R agonists are currently in the clinic for the treatment of obesity and/or hyperphagia. It is noteworthy that
the pattern of effects differed among each of the other MC4R therapies, underscoring the complex physiology of MC4R.
With setmelanotide, there has been little, if any, evidence of blood pressure or heart rate changes, preliminarily supporting
an important differentiation of setmelanotide from previous MC4R therapies. Monitoring for blood pressure and heart rate
changes, as well as other potential AEs, is included in all setmelanotide clinical trials.

Because  of  these  first  generation  MC4R  therapy  failures,  the  setmelanotide  program  employed  an  intensive
preclinical  screening  program  to  assess  clinical  candidates  for  blood  pressure  and  heart  rate  effects,  along  with  efficacy.
The  cornerstone  of  this  preclinical  screening  program  was  a  significant  investment  in  obese  primate  studies  which
validated  setmelanotide  as  a  promising  compound  for  clinical  development.    More  recently,  new  research  supporting  a
unique mechanism of action of setmelanotide, compared to earlier MC4R agonists and the endogenous ligand MSH, was
published in May 2018 in Nature Medicine.  

Setmelanotide  was  generally  well  tolerated  in  our  Phase  1,  Phase  2  and  Phase  3  clinical  trials  to  date.  Overall,
except as outlined below, the number and patterns of AEs were generally low, and the intensity of the AEs was generally
mild, and infrequently led to clinical trial discontinuation.

To  evaluate  whether  setmelanotide  has  the  potential  to  avoid  adverse  cardiovascular  issues,  we  studied
setmelanotide  in  obese  primate  preclinical  studies,  with  special  attention  to  cardiovascular  effects.  The  results  of  these
studies  supported  testing  in  clinical  trials.  In  the  clinical  trials,  we  monitored  blood  pressure  and  heart  rate  extensively,
primarily by 24-hour ambulatory blood pressure monitoring, or ABPM. In most clinical trials, there were multiple 24-hour
ABPM periods, both on a pre-treatment and post-treatment basis. Trial-by-trial review of the 24-hour ABPM data showed
little, if any, evidence of changes in heart rate and/or blood pressure even at the highest doses tested in Phase 1 and Phase 2
clinical trials. We have also conducted an analysis of 24-hour ABPMs that were obtained pre-dose and post-dose across
completed  studies,  which  was  presented  at  the  Obesity  Society  in  2015.  This  included  128  patients,  of  which  79  were
active and 49 were on a placebo. Overall, there was little, if any, evidence of blood pressure or heart rate changes evident
from  baseline  versus  placebo  in  any  trial,  preliminarily  supporting  an  important  differentiation  of  setmelanotide  from
previous MC4R therapies.

In the majority of our trials, we observed a small increase in frequency of penile erections in male patients, as well
as  signs  of  sexual  arousal  in  a  small  number  of  female  patients.  These  symptoms  were  infrequent,  generally  mild,  not
painful,  and  short-lived.  Most  often  these  symptoms  were  reported  in  the  first  week  of  treatment.  There  was  a  small
incidence of nausea and vomiting, as well as injection site reactions, both of which usually were reported as mild, early in
treatment, and short-lived. A small number of patients had dose reductions and/or discontinued treatment due to nausea and
vomiting.

We  also  noted  darkening  of  skin  and  skin  lesions,  such  as  moles  and  freckles,  in  most  patients  who  received
setmelanotide.  This  was  likely  caused  by  activation  of  the  closely  related  MC1  receptor,  the  receptor  that  mediates  skin
darkening  in  response  to  sun  exposure.  This  was  observed  generally  after  one  to  two  weeks  of  treatment,  most  often
plateaued by two to four weeks of treatment, and like sun-related tanning, generally returned to baseline after cessation of
exposure.  

Overall, the most common AEs reported among setmelanotide treated patients have been skin hyperpigmentation,

injection site reactions, nausea, headache, vomiting, decreased appetite, and diarrhea.

Life-Cycle Management and Preclinical Development

We continue to advance the development of our once-weekly formulation of setmelanotide for all indications in

which setmelanotide is approved or in development.  We plan to discuss our development plans with the FDA and EMA

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in the first half of 2021 and anticipate dosing the first patient in our planned once-weekly clinical trial in late 2021.  In
addition,  we  have  initiated  development  of  an  auto-injector  device  designed  to  make  administration  of  our  once-weekly
product candidate easier and more convenient for our patients.

IMCIVREE  is  approved  in  the  US  for  patients  6  years  of  age  and  older.    We  are  also  seeking  approval  for
pediatric patients 6 years of age and older in the EU.  We have identified children with genetic obesity under 6 years of age
who we believe may potentially benefit from treatment with setmelanotide.  We plan to initiate a clinical study in POMC
deficiency obesity, LEPR deficiency obesity, and BBS patients 2 – 5 years of age in the second half of 2021.  In addition,
we  have  initiated  discussions  with  the  EMA  to  modify  our  EMA-approved  Pediatric  Investigation  Plan,  or  PIP,    to  be
consistent with our plans for the treatment of these younger patients.  We  expect to meet all our PIP requirements by 2024.

We are no longer pursuing development of a pre-clinical asset, RM-853, a ghrelin O acyltransferase inhibitor that
had  been  in  preclinical  development  for  Prader-Willi  syndrome,  a  rare  genetic  disorder  that  results  in  hyperphagia  and
early-onset, life-threatening obesity.

We  have  initiated  a  program  to  identify  next  generation  MC4R  agonists  based  on  the  setmelanotide  chemical
space  that  both  have  the  potential  to  avoid  cardiovascular  AEs  and  MC1R  activation,  the  latter  of  which  results  in
hyperpigmentation.  This  program  is  expected  to  result  in  a  clinical  development  candidate  that  will  be  a  potent  MC4R
agonist matching setmelanotide’s cardiovascular safety but without the potential to cause hyperpigmentation. We expect to
identify a lead compound from this program for preclinical development in 2022.

Genetic Sequencing and Patient Finding

We  continue  to  expand  our  sequencing  efforts  in  individuals  living  with  early-onset,  severe  obesity    to  support
research, patient finding and community building efforts in order to better understand rare genetic diseases of obesity. Our
obesity DNA database contains sequencing samples from approximately 37,500 individuals, and we are using these data to
support research, patient finding and community building while forging a better understanding of rare genetic diseases of
obesity.  With  our  focus  on  the  MC4R  pathway,  we  believe  this  database  is  an  important  resource  for  identifying  new
indications  for  clinical  development  with  new  populations  and  prevalence  estimates  for  who  may  benefit  from
setmelanotide. By bringing additional awareness to these rare genetic diseases of obesity, our sequencing efforts have the
potential to help  foster patient communities and drive medical action in these populations.

We  analyze  these  samples  utilizing  a  proprietary  gene  curation  and  selection  strategy  to  assess  each  gene’s
relevance  to  the  MC4R  pathway.  For  example,  we  used  this  approach  in  identifying  the  31  additional  MC4R  pathway
genes that we plan to evaluate in our expanded Phase 2 Basket Study.

Our sequencing data comes from three sources:

Uncovering Rare Obesity

As severe obesity is epidemic in the United States, we are focused on identifying people with early-onset obesity
that may be caused by certain rare genetic variants. As part of these efforts, we have launched Uncovering Rare Obesity in
order  to  increase  access  to  genetic  testing.  As  of  December  31,  2020,  2,035  United  States  health  care  providers  have
requested  13,900  Uncovering  Rare  Obesity  kits,  and  6,163  sequencing  tests  have  been  ordered  and  patient  samples
collected. We launched the program in summer 2019, and we did experience a decrease in ordered and processed kits in
2020 due to the COVID-19 pandemic, as many people stayed away from health care facilities.  Moving forward, we expect
that Uncovering Rare Obesity, or URO, our free genetic testing program designed to help determine if individuals have an
underlying genetic cause of their severe obesity, will become the primary driver of how we collect sequencing samples and
identify patients.  

This program complements several initiatives designed to advance the understanding of genetic causes of severe
obesity,  and  Uncovering  Rare  Obesity  broadens  these  efforts  and  brings  access  to  genetic  testing  into  the  community
setting. Currently available physician-ordered genetic testing panels are often cost prohibitive, while many consumer

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genetic tests are incomplete when it comes to genetic disorders of obesity. This makes it difficult to confirm an underlying
genetic cause of severe obesity. We believe the program marks an important step in the understanding of these disorders
that might help patients and their families find new diagnosis and treatment strategies in the years ahead.

We  are  partnering  with  Prevention  Genetics,  a  Clinical  Laboratory  Improvement  Amendments-College  of
American Pathologists of CLIA/CAP-certified independent laboratory, to conduct the genetic testing for Uncovering Rare
Obesity. This program covers the cost of the test and excludes office visit, copay, sample collection, and any other related
costs to a participant. In addition, as part of the program, licensed genetic counselors from PWN Health, a leading provider
of professional guidance for diagnostic and genetic testing, are available to advise participating individuals.

Genotyping Study

We have completed our initial genotyping study—the Genetic Obesity ID | Genotyping Study, with approximately
10,000 patients having been enrolled in the study.  We included approximately 100 genes which, in medical and scientific
literature,  have  been  associated  with  obesity,  including  other  genes  associated  with  the  MC4R  pathway.  We  genotyped
patients  who  entered  the  study  through  one  of  three  arms  including:  a  history  of  early-onset,  severe  obesity,  and
hyperphagia, high BMI, and individuals within three months of bariatric surgery. We plan to work with these investigators
to  publish  the  results  of  this  study  and  guidance  on  the  use  of  the  algorithm  for  screening,  to  enable  more  systematic
diagnoses of these rare genetic disorders of obesity.

Biobanks

The third source of our sequencing data come from global network of collaborations with obesity researchers we
built over time with treaters and the biggest institutes that generate large quantities of DNA sequence data. Biobank based
sequencing provides data principally for scientific and epidemiological research.

Competition

The  biotechnology  and  pharmaceutical  industries  are  intensely  competitive  and  subject  to  rapid  and  significant
technological change. We have competitors in a number of jurisdictions, many of which have substantially greater name
recognition,  commercial  infrastructures  and  financial,  technical  and  personnel  resources  than  we  have.  Established
competitors  may  invest  heavily  to  quickly  discover  and  develop  compounds  that  could  make  setmelanotide  obsolete  or
uneconomical. Any new product that competes with an approved product may need to demonstrate compelling advantages
in efficacy, convenience, tolerability and safety to be commercially successful. Other competitive factors, including generic
competition, could force us to lower prices or could result in reduced sales. In addition, new products developed by others
could  emerge  as  competitors  to  setmelanotide.  If  we  are  not  able  to  compete  effectively  against  our  current  and  future
competitors, our business will not grow, and our financial condition and operations will suffer.

Currently, IMCIVREE is the only approved treatment for regulating hunger and hyperphagia related behaviors of
patients  with  obesity  due  to  POMC,  PCSK1  or  LEPR  deficiencies,  and  there  are  no  approved  treatments  for  regulating
hunger  and  hyperphagia  related  behaviors  of  patients  BBS,  Alström  syndrome,  POMC  heterozygous  deficiency  obesity,
SRC1  deficiency  obesity,  SH2B1  deficiency  obesity,  MC4R  deficiency  obesity,  or  Smith-Magenis  syndrome.  Bariatric
surgery  is  not  a  treatment  option  for  these  genetic  diseases  of  obesity  because  the  severe  obesity  and  hyperphagia
associated with these diseases are considered to be risk factors for bariatric surgery.  

Licensing Agreements

Ipsen Pharma S.A.S.

Pursuant  to  a  license  agreement  with  Ipsen  Pharma  S.A.S.,  or  Ipsen,  we  have  an  exclusive,  sublicensable,
worldwide  license  to  certain  patents  and  other  intellectual  property  rights  to  research,  develop,  and  commercialize
compounds that were discovered or researched by Ipsen in the course of conducting its MC4R program or that otherwise
were covered by the licensed patents. Rights under the license included the right to research, develop and commercialize
setmelanotide. Pursuant to the license, we have a non-exclusive, sublicensable, worldwide license to certain patents and

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other intellectual property rights that were licensed by Ipsen from a third party or that Ipsen may develop in the future to
research, develop, and commercialize any of the compounds exclusively licensed by Ipsen pursuant to the license.  

Under the terms of the Ipsen license agreement, Ipsen is eligible to receive payments of up to $40.0 million upon
the  achievement  of  certain  development  and  commercial  milestones  in  connection  with  the  development,  regulatory
approval  and  commercialization  of  applicable  licensed  products,  and  royalties  on  future  sales  of  the  licensed  products.
Substantially all of the aggregate payments under the Ipsen license agreement are for milestones that may be achieved no
earlier than first commercial sale of the applicable licensed product, and to date, we have paid $4.0 million in clinical and
regulatory  milestones.    Royalties  in  the  mid-single  digits  on  future  sales  of  the  applicable  licensed  products  will  be  due
under the Ipsen license agreement on a licensed product-by-licensed product and country-by-country basis until the later of
the date when sales of a licensed product in a particular country are no longer covered by patent rights licensed pursuant to
the  Ipsen  license  agreement  and  the  tenth  anniversary  of  the  date  of  the  first  commercial  sale  of  the  applicable  licensed
product in the applicable country. The term of the Ipsen license agreement continues until the expiration of the applicable
royalty  term  on  a  country-by-country  and  product-by-  product  basis.  Upon  expiration  of  the  term  of  the  agreement,  the
licensed  rights  granted  to  us  under  the  agreement,  to  the  extent  they  remain  in  effect  at  the  time  of  expiration,  will
thereafter become irrevocable, perpetual and fully paid-up licenses that survive the expiration of the term. We have a right
to terminate the license agreement at any time during the term for any reason on 180 days’ written notice to Ipsen. Ipsen
has a right to terminate the agreement prior to expiration of its term for our material breach of the agreement, our failure to
initiate or complete development of a licensed product or our bringing an action seeking to have an Ipsen license patent
right declared invalid. Upon any early termination of the license agreement not due to Ipsen’s material breach, all licensed
rights granted under the license agreement will terminate.

Camurus

In  January  2016,  we  entered  into  a  license  agreement  for  the  use  of  Camurus’  drug  delivery  technology,
FluidCrystal,  to  formulate  setmelanotide  with  Camurus.  Under  the  terms  of  the  agreement,  Camurus  granted  us  a
worldwide  license  to  the  FluidCrystal  technology  to  formulate  setmelanotide  and  to  develop,  manufacture,  and
commercialize this new formulation for once-weekly dosing, administered as a SC injection. The license granted to us is
specific  to  the  FluidCrystal  technology  incorporating  setmelanotide.  Under  the  terms  of  the  license  agreement,  we  are
responsible  for  manufacturing,  development,  and  commercialization  of  the  setmelanotide  FluidCrystal  formulation
worldwide. Camurus received a non-refundable and non-creditable upfront payment of $0.5 million in January 2016, and is
eligible  to  receive  progressive  payments  of  approximately  $65.0  million,  of  which  the  majority  are  sales  milestones.  In
addition, Camurus is eligible to receive tiered, mid to mid-high, single digit royalties on future sales of the product.

The term of the agreement continues until the expiration of the applicable royalty term on a country-by-country
and  product-by-product  basis.  Upon  expiration  of  the  term  of  the  agreement,  the  licensed  rights  granted  to  us  under  the
agreement, to the extent they remain in effect at the time of expiration, will thereafter become irrevocable, perpetual and
fully paid-up licenses that survive the expiration of the term. We have a right to terminate the license agreement at any time
during the term for any reason upon 90 days’ written notice to Camurus. Camurus has a right to terminate the agreement
prior  to  expiration  of  its  term  for  our  material  breach  of  the  agreement,  if  we  voluntarily  or  involuntarily  file  for
bankruptcy, or for our bringing an action seeking to have a Camurus license patent right declared invalid. Upon any early
termination  of  the  license  agreement  not  due  to  Camurus’  material  breach,  all  licensed  rights  granted  under  the  license
agreement will terminate.

Takeda

In  March  2018,  we  acquired  exclusive,  worldwide  rights  from  Takeda  to  develop  and  commercialize  RM-853.
RM-853 is a potent, orally available GOAT inhibitor currently in preclinical development for Prader-Willi Syndrome, or
PWS. PWS is a rare genetic disorder that results in hyperphagia and early-onset, life-threatening obesity, for which there
are  no  approved  therapeutic  options.  We  will  assume  sole  responsibility  for  the  global  product  development  and
commercialization of RM-853. Takeda received an upfront fee of $4.4 million which we settled in April 2018 with shares
of our common stock, and is eligible to receive milestone payments of approximately $140.0 million, most of which are
payable upon regulatory approval or are sales milestones. In addition, Takeda is eligible to receive back-end development
milestones, and single-digit royalties on future RM-853 sales.

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Among other obligations under our agreement with Takeda, Takeda has a right of first negotiation under certain
circumstances  to  sublicense  the  assets  we  acquired  from  Takeda  in  the  territory  of  Japan.  This  right  of  first  negotiation
remains in effect until the earlier of five years from the date of the agreement, consummation of a change in control, or
sublicense to a third party. This may delay or limit our ability to enter into certain transactions with respect to this product
candidate.

The term of the agreement continues until the expiration of the applicable royalty term on a country-by-country
and  product-by-product  basis.  Upon  expiration  of  the  term  of  the  agreement,  the  licensed  rights  granted  to  us  under  the
agreement, to the extent they remain in effect at the time of expiration, will thereafter become irrevocable, perpetual and
fully paid-up licenses that survive the expiration of the term. We have a right to terminate the license agreement at any time
during the term for any reason upon 90 days’ written notice to Takeda. Takeda has a right to terminate the agreement prior
to expiration of its term for our material breach of the agreement, if we voluntarily or involuntarily file for bankruptcy, or
for our bringing an action seeking to have a Takeda license patent right declared invalid. Upon any early termination of the
license  agreement  not  due  to  Takeda’s  material  breach,  all  licensed  rights  granted  under  the  license  agreement  will
terminate.

Patents and Proprietary Rights

We  have  in-licensed  a  large  patent  portfolio  from  Ipsen  for  our  melanocortin  programs.  The  portfolio  includes
multiple  patent  families,  and  all  of  these  in-licensed  patent  families  are  being  prosecuted  or  maintained  by  Ipsen  in
consultation with us. We have also filed patent applications in six families which are exclusively owned and maintained by
us that relate to the melanocortin program.

Our MC4R portfolio of licensed and exclusively owned patent families, which includes setmelanotide, consists of
13  patent  families  currently  being  prosecuted  or  maintained,  which  include  applications  and  patents  directed  to
compositions  of  matter,  formulations  and  methods  of  treatment  using  setmelanotide.  As  of  December  31,  2020,  the
portfolio for the MC4 program consists of 14 issued United States patents and 228 issued non-United States patents across
8  of  the  13  families.  There  also  13  pending  United  States  patent  applications  and  76  pending  non-United  States
applications in 24 jurisdictions.

In  the  patent  family  directed  to  selected  MC4R  receptor  agonists,  including  the  composition  of  matter  for
setmelanotide,  we  have  3  issued  United  States  patents  and  108  issued  non-United  States  patents,  including  Australia,
Canada, China, Europe, Hong Kong, India, Israel, Japan, Korea, New Zealand, Russia and Singapore. The standard 20-year
term for patents in this family would expire in 2026, but two of the United States patents are expected to expire in 2027 due
to patent term adjustments. Patent term extensions for delays in marketing approval may also extend the terms of patents in
this family, and we have filed for patent term extension in the United States that, if granted, would extend the composition
of matter patent protection to 2032.

In  addition  to  the  patents  and  patent  applications  discussed  above,  we  co-own  one  patent  family  with  Charité-
Universitätsmedizin Berlin, which has been filed in 21 jurisdictions. We also co-own one patent family with the University
of Strasbourg and the French National Institute of Health and Medical Research, which has been filed in 4 jurisdictions.
Both of these patent families relate to the melanocortin program.

We have also in-licensed a patent family from Takeda directed to the composition of matter and methods of use of
ghrelin O-acetyltransferase inhibitors, including RM-853. This patent family includes 1 issued United States patent, nine
issued non-United States patents including China, Europe, and Japan, and one allowed application in Canada. The standard
20-year  term  for  the  patents  in  this  family  will  expire  in  2033,  though  patent  term  extensions  for  delays  in  marketing
approval may also extend the terms of patents in this family.

Intellectual Property Protection Strategy

We currently seek, and intend to continue seeking, patent protection whenever commercially reasonable for any
patentable aspects of setmelanotide and related technology or any new products or product candidates we acquire in the
future. Where our intellectual property is not protected by patents, we may seek to protect it through other means, including

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maintenance  of  trade  secrets  and  careful  protection  of  our  proprietary  information.  Our  license  from  Ipsen  for  the
melanocortin program require Ipsen, subject to certain exceptions and upon consultation with us, to prosecute and maintain
its patent rights as they relate to the licensed compounds and methods. If Ipsen decides to cease prosecution or maintenance
of any of the licensed patent rights, we have the option to take over prosecution and maintenance of those patents and Ipsen
will assign to us all of its rights in such patents. For those patent rights that we own exclusively, we control all prosecution
and maintenance activities.

The patent positions of biopharmaceutical companies are generally uncertain and involve complex legal, scientific
and  factual  questions.  In  addition,  the  coverage  claimed  in  a  patent  application  can  be  significantly  reduced  before  the
patent  is  issued,  and  its  scope  can  be  reinterpreted  after  issuance.  Consequently,  we  do  not  know  whether  the  product
candidate  we  in-license  will  be  protectable  or  remain  protected  by  enforceable  patents.  We  cannot  predict  whether  the
patent applications we are currently pursuing will issue as patents in any particular jurisdiction, and furthermore, we cannot
determine  whether  the  claims  of  any  issued  patents  will  provide  sufficient  proprietary  protection  to  protect  us  from
competitors, or will be challenged, circumvented or invalidated by third parties. Because patent applications in the United
States and certain other jurisdictions are maintained in secrecy for 18 months, and since publication of discoveries in the
scientific or patent literature often lags behind actual discoveries, we cannot be certain of the priority of inventions covered
by pending patent applications. This potential issue is exacerbated by the fact that, prior to March 16, 2013, in the United
States,  the  first  to  make  the  claimed  invention  may  be  entitled  to  the  patent.  On  March  16,  2013,  the  United  States
transitioned to a “first to file” system in which the first inventor to file a patent application may be entitled to the patent.
For  applications  filed  prior  to  the  institution  of  the  “first  to  file”  system,  we  may  have  to  participate  in  interference
proceedings declared by the United States Patent and Trademark Office, or PTO, or a foreign patent office to determine
priority of invention. Moreover, we may have to participate in other proceedings declared by the United States PTO or a
foreign patent office, such as post-grant proceedings and oppositions, that challenge the validity of a granted patent. Such
proceedings could result in substantial cost, even if the eventual outcome is favorable to us.

Although  we  currently  have  issued  patents  directed  to  a  number  of  different  attributes  of  our  products,  and
pending  applications  on  others,  there  can  be  no  assurance  that  any  issued  patents  would  be  held  valid  by  a  court  of
competent jurisdiction. An adverse outcome could subject us to significant liabilities to third parties, require disputed rights
to be licensed from third parties or require us to cease using specific compounds or technology. To the extent prudent, we
intend to bring litigation against third parties that we believe are infringing our patents.

The  term  of  individual  patents  depends  upon  the  legal  term  of  the  patents  in  the  countries  in  which  they  are
obtained. In most countries in which we file, the patent term is 20 years from the earliest date of filing a non-provisional
patent application. In the United States, a patent’s term may be lengthened by patent term adjustment, which compensates a
patentee  for  administrative  delays  by  the  United  States  PTO  in  granting  a  patent,  or  may  be  shortened  if  a  patent  is
terminally disclaimed over another patent with an earlier expiration date.

As mentioned above, in the United States, the patent term of a patent that covers an FDA-approved drug may also
be eligible for patent term extension, which permits patent term restoration as compensation for the patent term lost during
the FDA regulatory review process. Setmelanotide has received FDA approval and we have filed for patent term extension
on that product. In the future, if and when our other pharmaceutical products receive FDA approval, we expect to apply for
patent term extensions on patents covering those products. We intend to seek patent term adjustments and extensions to any
of  our  issued  patents  in  any  jurisdiction  where  these  are  available,  however  there  is  no  guarantee  that  the  applicable
authorities, including the FDA in the United States, will agree with our assessment of whether such extensions should be
granted, and even if granted, the length of such adjustments or extensions.

To  protect  our  rights  to  any  of  our  issued  patents  and  proprietary  information,  we  may  need  to  litigate  against
infringing  third  parties,  or  avail  ourselves  of  the  courts  or  participate  in  hearings  to  determine  the  scope  and  validity  of
those patents or other proprietary rights. These types of proceedings are often costly and could be very time-consuming to
us, and we cannot be certain that the deciding authorities will rule in our favor. An unfavorable decision could result in the
invalidation  or  a  limitation  in  the  scope  of  our  patents  or  forfeiture  of  the  rights  associated  with  our  patents  or  pending
patent applications. Any such decision could result in our key technologies not being protectable, allowing third parties to
use our technology without being required to pay us licensing fees or may compel us to license needed technologies from
third parties to avoid infringing third-party patent and proprietary rights. Such a decision could even result in the

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invalidation or a limitation in the scope of our patents or could cause us to lose our rights under existing issued patents or
not to have rights granted under our pending patent applications.

In addition, we intend to seek orphan drug exclusivity in jurisdictions in which it is available. A prerequisite to
orphan  drug  exclusivity  in  the  United  States  and  in  the  European  Union  is  orphan  drug  designation.  An  orphan  drug
designation may be granted, subject to fulfillment of specific criteria, where a drug is developed specifically to treat a rare
or  uncommon  medical  treatment.  If  a  product  which  has  an  orphan  drug  designation  subsequently  receives  the  first
regulatory  approval  for  the  indication  for  which  it  has  such  designation,  the  product  is  entitled  to  orphan  exclusivity,
meaning that the applicable regulatory authority may not approve any other applications to market the same drug for the
same indication, except in certain very limited circumstances, for a period of seven years in the United States and 10 years
in  the  European  Union.  Orphan  drug  exclusivity  does  not  prevent  competitors  from  developing  or  marketing  different
drugs for an indication. We have received orphan drug designation in the United States for the use of setmelanotide for five
indications and approval for two of those indications.

We also rely on trade secret protection for our confidential and proprietary information. Although we take steps to
protect  our  proprietary  information  and  trade  secrets,  including  through  contractual  means  with  our  employees  and
consultants,  no  assurance  can  be  given  that  others  will  not  independently  develop  substantially  equivalent  proprietary
information  and  techniques  or  otherwise  gain  access  to  our  trade  secrets  or  disclose  such  technology,  or  that  we  can
meaningfully  protect  our  trade  secrets.  It  is  our  policy  to  require  our  employees,  consultants,  outside  scientific
collaborators, sponsored researchers and other advisors to execute confidentiality agreements upon the commencement of
employment or consulting relationships with us. These agreements provide that all confidential information developed or
made known to the individual during the course of the individual’s relationship with us is to be kept confidential and not
disclosed  to  third  parties  except  in  specific  circumstances.  In  the  case  of  employees,  the  agreements  provide  that  all
inventions  conceived  by  the  individual  will  be  our  exclusive  property.  There  can  be  no  assurance,  however,  that  these
agreements will provide meaningful protection or adequate remedies for our trade secrets in the event of unauthorized use
or disclosure of such information.

Manufacturing

We currently contract with various third parties for the manufacture of setmelanotide and intend to continue to do
so in the future. We have entered into process development and manufacturing service agreements with our CMOs, Corden
Pharma Brussels S.A, or Corden (formerly Peptisyntha SA prior to its acquisition by Corden), PolyPeptide Group, Baine
L’Alleud,  or  Polypeptide,  Neuland  Laboratories,  and  Recipharm  Monts  S.A.S  for  certain  process  development  and
manufacturing services for regulatory starting materials and/or drug substance, or API, and drug product in connection with
the manufacture of setmelanotide.  Under our agreements, we pay these third parties for services in accordance with the
terms of mutually agreed upon work orders, which we may enter into from time to time. We may need to engage additional
third-party suppliers to manufacture our clinical and commercial drug supplies. In connection with our commercialization
of setmelanotide or any future product candidate, we have engaged and will need to engage other third parties to assist in,
among other things, labeling, packaging and distribution. Under the current agreements, each party is subject to customary
indemnification provisions.

Our contract manufacturing agreements give us visibility into the expected future cost of producing setmelanotide
at  commercial  scale.  Based  upon  a  range  of  prices  of  currently-marketed  therapies  indicated  for  orphan  diseases,  we
believe that our cost of goods for setmelanotide will be highly competitive.

We currently have no plans to build our own clinical or commercial scale manufacturing capabilities. To meet our
projected needs for clinical supplies to support our activities through regulatory approval and commercial manufacturing,
the  CMOs  with  whom  we  currently  work  may  need  to  increase  scale  of  production  or  we  expect  that  we  may  need  to
secure alternate suppliers. We have not currently identified alternate suppliers in the event the current CMOs we utilize are
unable  to  scale  production.  Because  we  rely  on  these  CMOs,  we  have  personnel  with  pharmaceutical  development  and
manufacturing experience who are responsible for maintaining our CMO relationships.

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Regulatory Matters

Government Regulation

Government authorities in the United States, at the federal, state and local level, and other countries extensively
regulate,  among  other  things,  the  research,  development,  testing,  manufacture,  quality  control,  approval,    labeling,
 packaging,  storage,  record-keeping,  promotion,  advertising,  distribution,  marketing  and export and import of drug
products. A new drug must be approved by the FDA through the NDA process before it may be legally marketed in the
United States. We, along with any third-party contractors, will be required to navigate the various preclinical, clinical and
commercial  approval  requirements  of  the  governing  regulatory  agencies  of  the  countries  in  which  we  wish  to  conduct
studies  or  seek  approval  of  our  products  and  product  candidates.  The  process  of  obtaining  regulatory  approvals  and  the
subsequent compliance with applicable federal, state, local and foreign statutes and regulations require the expenditure of
substantial time and financial resources.

U.S. Drug Development Process

In the United States, the FDA regulates drugs under the federal Food, Drug, and Cosmetic Act (FDCA) and its
implementing regulations. The process of obtaining regulatory approvals and the subsequent compliance with appropriate
federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial resources.
The process required by the FDA before a drug may be marketed in the United States generally involves the following:

● completion of preclinical laboratory tests, animal studies and formulation studies in accordance with FDA’s

Good Laboratory Practice requirements and other applicable regulations;

● submission  to  the  FDA  of  an  Investigational  New  Drug  Application  (IND),  which  must  become  effective

before human clinical trials may begin;

● approval  by an independent Institutional Review Board (IRB) or ethics  committee  at  each  clinical  site

 before  each  trial  may be initiated;

● performance of adequate  and  well-controlled  human  clinical  trials  in  accordance  with  good clinical

practices (GCPs), to establish the safety and efficacy of the proposed drug for its intended use;

● preparation of and submission to the FDA of an NDA after completion of all pivotal trials;

● a determination by the FDA within 60 days of its receipt of an NDA to file the application for review

● satisfactory completion of an FDA advisory committee review, if applicable;

● satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the drug is
produced  to  assess  compliance  with  current  Good  Manufacturing  Practice  (cGMP)  requirements  to  assure
that  the  facilities,  methods  and  controls  are  adequate  to  preserve  the  drug’s  identity,  strength,  quality  and
purity, and of selected clinical investigation sites to assess compliance with GCPs; and

● FDA  review  and  approval  of  the  NDA  to  permit  commercial  marketing  of  the  product  for  particular

indications for use in the United States.

Prior to beginning the first clinical trial with a product candidate in the United States, a sponsor must submit an
IND to the FDA. An IND is a request for authorization from the FDA to administer an investigational new drug product to
humans.  The  central  focus  of  an  IND  submission  is  on  the  general  investigational  plan  and  the  protocol(s)  for  clinical
studies.  The  IND  also  includes  results  of  animal  and  in  vitro  studies  assessing  the  toxicology,  pharmacokinetics,
pharmacology, and pharmacodynamic characteristics of the product; chemistry, manufacturing, and controls information;
and any available human data or literature to support the use of the investigational product. An IND must become effective

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before human clinical trials may begin. The IND automatically becomes effective 30 days after receipt by the FDA, unless
the  FDA,  within  the  30-  day  time  period,  raises  safety  concerns  or  questions  about  the  proposed  clinical  trial.  In  such  a
case, the IND may be placed on clinical hold and the IND sponsor and the FDA must resolve any outstanding concerns or
questions before the clinical trial can begin. Submission of an IND therefore may or may not result in FDA authorization to
begin a clinical trial.

Clinical trials involve the administration of the investigational product to human subjects under the supervision of
qualified  investigators  in  accordance  with  GCPs,  which  include  the  requirement  that  all  research  subjects  provide  their
informed  consent  for  their  participation  in  any  clinical  study.  Clinical  trials  are  conducted  under    protocols    detailing,
  among    other    things,    the    objectives    of    the    study,    the    parameters    to    be    used    in  monitoring  safety  and  the
effectiveness criteria to be evaluated. A separate submission to the existing IND must be made for each successive clinical
trial  conducted  during  product  development  and  for  any  subsequent  protocol  amendments.  Furthermore,  an  independent
IRB  for  each  site  proposing  to  conduct  the  clinical  trial  must  review  and  approve  the  plan  for  any  clinical  trial  and  its
informed consent form before the clinical trial begins at that site and must monitor the study until completed. Some studies
also include oversight by an independent group of qualified experts organized by the clinical study sponsor, known as a
data safety  monitoring  board,  which  provides  authorization  for  whether  or  not  a  study  may  move  forward  at
designated check points based on access to certain data from the study and may halt the clinical trial if it determines that
there is an unacceptable safety risk for subjects or other grounds, such as no demonstration of efficacy. Depending on its
charter, this group may determine whether a trial may move forward at designated check points based on access to certain
data from the trial. The FDA or the sponsor may suspend a clinical trial at any time on various grounds, including a finding
that the research subjects or patients are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or
terminate approval of a clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s
requirements  or  if  the  drug  has  been  associated  with  unexpected  serious  harm  to  patients.    There  are  also  requirements
governing the reporting of ongoing clinical studies and clinical study results to public registries.

Human clinical trials are typically conducted in three sequential phases that may overlap or be combined:

● Phase 1: The product candidate is initially introduced into healthy human subjects or patients with the target
disease or condition. These studies are designed to test the safety, dosage tolerance, absorption, metabolism
and distribution of the investigational product in humans, the side effects associated with increasing doses,
and, if possible, to gain early evidence on effectiveness.

● Phase  2:  The  product  candidate  is  administered  to  a  limited  patient  population  with  a  specified  disease  or
condition to evaluate the preliminary efficacy, optimal dosages and dosing schedule and to identify possible
adverse side effects and safety risks. Multiple Phase 2 clinical trials may be conducted to obtain information
prior to beginning larger and more expensive Phase 3 clinical trials.

● Phase 3: The product candidate is administered to an expanded patient population to further evaluate dosage,
to  provide  statistically  significant  evidence  of  clinical  efficacy  and  to  further  test  for  safety,  generally  at
multiple geographically dispersed clinical trial sites. These clinical trials are intended to establish the overall
risk/benefit ratio of the investigational product and to provide an adequate basis for product approval.

In some cases, the FDA may require, or sponsors may voluntarily pursue, additional clinical trials after a product
is approved to gain more information about the product. These so-called Phase 4 studies, may be conducted after initial
marketing  approval,  and  may  be  used  to  gain  additional  experience  from  the  treatment  of  patients  in  the  intended
therapeutic indication. In certain instances, the FDA may mandate the performance of Phase 4 clinical trials as a condition
of approval of an NDA.

Concurrent  with  clinical  trials,  companies  usually  complete  additional  animal  studies  and  must  also  develop
additional information about the chemistry and physical characteristics of the drug and finalize a process for manufacturing
the product in commercial quantities in accordance with cGMP requirements. The manufacturing process must be capable
of consistently producing quality batches of the product candidate and, among other things, the manufacturer must develop
methods for testing the identity, strength, quality and purity of the final drug. In addition, appropriate packaging must be

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selected  and  tested,  and  stability  studies  must  be  conducted  to  demonstrate  that  the  product  candidate  does  not  undergo
unacceptable deterioration over its shelf life.

While  the  IND  is  active  and  before  approval,  progress  reports  summarizing  the  results  of  the  clinical  trials  and
nonclinical studies performed since the last progress report must be submitted at least annually to the FDA, and written
IND safety reports must be submitted to the FDA and investigators for serious and unexpected suspected adverse events,
findings  from  other  studies  suggesting  a  significant  risk  to  humans  exposed  to  the  same  or  similar  drugs,  findings  from
animal  or  in  vitro  testing  suggesting  a  significant  risk  to  humans,  and  any  clinically  important  increased  incidence  of  a
serious suspected adverse reaction compared to that listed in the protocol or investigator brochure.

In  addition,  during  the  development  of  a  new  drug,  sponsors  are  given  opportunities  to  meet  with  the  FDA  at
certain points. These points may be prior to submission of an IND, at the end of Phase 2, and before an NDA is submitted.
Meetings at other times may be requested. These meetings can provide an opportunity for the sponsor to share information
about the data gathered to date, for the FDA to provide advice, and for the sponsor and the FDA to reach agreement on the
next phase of development. Sponsors typically use the meetings at the end of the Phase 2 trial to discuss Phase 2 clinical
results and present plans for the pivotal Phase 3 clinical trials that they believe will support approval of the new drug.

U.S. Review and Approval Process

Assuming successful completion of all required testing in accordance with all applicable regulatory requirements,
the results of product development, preclinical and other non-clinical studies and clinical trials, along with descriptions of
the manufacturing process, analytical tests conducted on the chemistry of the drug, proposed labeling and other relevant
information are submitted to the FDA as part of an NDA requesting approval to market the product. Data can come from
company-sponsored clinical studies intended to test the safety and effectiveness of a use of the product, or from a number
of alternative sources, including studies initiated by independent investigators. The submission of an NDA is subject to the
payment of substantial user fees; a waiver of such fees may be obtained under certain limited circumstances. Additionally,
no user fees are assessed on NDAs for products designated as orphan drugs, unless the product also includes a non-orphan
indication.

The FDA conducts a preliminary review of all NDAs within the first 60 days after submission, before accepting
them  for  filing,  to  determine  whether  they  are  sufficiently  complete  to  permit  substantive  review  The  FDA  may  request
additional information rather than accept an NDA for filing. In this event, the NDA must be resubmitted with the additional
information. The resubmitted application also is subject to review before the FDA accepts it for filing. Once filed, the FDA
reviews an NDA to determine, among other things, whether a product is safe and effective for its intended use and whether
its manufacturing is cGMP-compliant to assure and preserve the product’s identity, strength, quality and purity. Under the
Prescription Drug User Fee Act (PDUFA) guidelines that are currently in effect, the FDA has a goal of ten months from the
filing date to complete a standard review of an NDA for a drug that is a new molecular entity. This review typically takes
twelve months from the date the NDA is submitted to FDA because the FDA has approximately two months to make a
“filing” decision after it the application is submitted.

The FDA may refer an application for a novel drug to an advisory committee. 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 carefully when making decisions.

Before  approving  an  NDA,  the  FDA  will  typically  inspect  the  facility  or  facilities  where  the  product  is
manufactured. The FDA will not approve an application unless it determines that the manufacturing processes and facilities
are in compliance with cGMP and adequate to assure consistent production of the product within required specifications.
Additionally, before approving a NDA, the FDA will typically inspect one or more clinical sites to assure compliance with
GCPs. If the FDA determines that the application, manufacturing process or manufacturing facilities are not acceptable, it
will outline the deficiencies in the submission and often will request  additional  testing  or  information.  Notwithstanding
 the  submission  of  any  requested  additional information, the FDA ultimately may decide that the application does not
satisfy the regulatory criteria for approval.

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After the FDA evaluates an NDA and conducts inspections of manufacturing facilities where the investigational
product and/or its drug substance will be produced, the FDA may issue an approval letter or a Complete Response Letter
(CRL).  An  approval  letter  authorizes  commercial  marketing  of  the  product  with  specific  prescribing  information  for
specific indications. A CRL will describe all of the deficiencies that the FDA has identified in the NDA, except that where
the FDA determines that the data supporting the application are inadequate to support approval, the FDA may issue the
CRL without first conducting required inspections and/or reviewing proposed labeling. In issuing the CRL, the FDA may
recommend  actions  that  the  applicant  might  take  to  place  the  NDA  in  condition  for  approval,  including  requests  for
additional information or clarification. The FDA may delay or refuse approval of an NDA if applicable regulatory criteria
are not satisfied, require additional testing or information and/or require post-marketing testing and surveillance to monitor
safety or efficacy of a product.

If  regulatory  approval  of  a  product  is  granted,  such  approval  will  be  granted  for  particular  indications  and  may
entail limitations on the indicated uses for which such product may be marketed. For example, the FDA may approve the
NDA with a Risk Evaluation and Mitigation Strategy (REMS) to ensure the benefits of the product outweigh its risks. A
REMS is a safety strategy to manage a known or potential serious risk associated with a medicine and to enable patients to
have  continued  access  to  such  medicines  by  managing  their  safe  use,  and  could  include  medication  guides,  physician
communication plans, or elements to assure safe use, such as restricted distribution methods, patient registries, and other
risk minimization tools. The FDA also may condition approval on, among other things, changes to proposed labeling or the
development of adequate controls and specifications. The FDA may also require one or more Phase 4 post- market studies
and surveillance to further assess and monitor the product’s safety and effectiveness after commercialization, and may limit
further marketing of the product based on the results of these post-marketing studies.

In addition, the Pediatric Research Equity Act (PREA) requires a sponsor to conduct pediatric clinical trials for
most  drugs,  for  a  new  active  ingredient,  new  indication,  new  dosage  form,  new  dosing  regimen  or  new  route  of
administration. Under PREA, original NDAs and supplements must contain a pediatric assessment unless the sponsor has
received  a  deferral  or  waiver.  The  required  assessment  must  evaluate  the  safety  and  effectiveness  of  the  product  for  the
claimed  indications  in  all  relevant  pediatric  subpopulations  and  support  dosing  and  administration  for  each  pediatric
subpopulation for which the product is safe and effective. The sponsor or FDA may request a deferral of pediatric clinical
trials for some or all of the pediatric subpopulations. A deferral may be granted for several reasons, including a finding that
the  drug  is  ready  for  approval  for  use  in  adults  before  pediatric  clinical  trials  are  complete  or  that  additional  safety  or
effectiveness  data  needs  to  be  collected  before  the  pediatric  clinical  trials  begin.  The  FDA  must  send  a  non-compliance
letter to any sponsor that fails to submit the required assessment, keep a deferral current or fails to submit a request for
approval of a pediatric formulation.

Expedited Development and Review Programs

The FDA offers a number of expedited development and review programs for qualifying product candidates. For
example,  the  Fast  Track  program  is  intended  to  expedite  or  facilitate  the  process  for  reviewing  new  products  that  are
intended to treat a serious or life-threatening disease or condition and demonstrate the potential to address unmet medical
needs  for  the  disease  or  condition.  Fast  Track  designation  applies  to  the  combination  of  the  product  and  the  specific
indication for which it is being studied. The sponsor of a fast track product has opportunities for more frequent interactions
with the applicable FDA review team during product development and, once an NDA is submitted, the product candidate
may  be  eligible  for  priority  review.  A  Fast  Track  product  may  also  be  eligible  for  rolling  review,  where  the  FDA  may
consider  for  review  sections  of  the  NDA  on  a  rolling  basis  before  the  complete  application  is  submitted,  if  the  sponsor
provides  a  schedule  for  the  submission  of  the  sections  of  the  NDA,  the  FDA  agrees  to  accept  sections  of  the  NDA  and
determines that the schedule is acceptable, and the sponsor pays any required user fees upon submission of the first section
of the NDA.

A  product  candidate  intended  to  treat  a  serious  or  life-threatening  disease  or  condition  may  also  be  eligible  for
Breakthrough Therapy designation to expedite its development and review. A product candidate can receive Breakthrough
Therapy designation if preliminary clinical evidence indicates that the product candidate, alone or in combination with one
or  more  other  drugs  or  biologics,  may  demonstrate  substantial  improvement  over  existing  therapies  on  one  or  more
clinically  significant  endpoints,  such  as  substantial  treatment  effects  observed  early  in  clinical  development.  The
designation includes all of the Fast Track program features, as well as more intensive FDA interaction and guidance

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beginning as early as Phase 1 and an organizational commitment to expedite the development and review of the product
candidate, including involvement of senior managers.

Any  marketing  application  for  a  drug  submitted  to  the  FDA  for  approval,  including  a  product  candidate  with  a
Fast  Track  designation  and/or  Breakthrough  Therapy  designation,  may  be  eligible  for  other  types  of  FDA  programs
intended to expedite the FDA review and approval process, such as priority review and accelerated approval. A product
candidate  is  eligible  for  priority  review  if  it  is  designed  to  treat  a  serious  or  life-threatening  disease  or  condition,  and  if
approved, would provide a significant improvement in safety or effectiveness compared to available alternatives for such
disease or condition. For new-molecular-entity NDAs, priority review designation means the FDA’s goal is to take action
on the marketing application within six months of the 60-day filing date.

Additionally,  product  candidates  studied  for  their  safety  and  effectiveness  in  treating  serious  or  life-threatening
diseases or conditions may receive accelerated approval upon a determination that the product has an effect on a surrogate
endpoint  that  is  reasonably  likely  to  predict  clinical  benefit,  or  on  a  clinical  endpoint  that  can  be  measured  earlier  than
irreversible morbidity or mortality, that is reasonably likely to predict an effect on irreversible morbidity or mortality or
other clinical benefit, taking into account the severity, rarity, or prevalence of the condition and the availability or lack of
alternative  treatments.  As  a  condition  of  accelerated  approval,  the  FDA  will  generally  require  the  sponsor  to  perform
adequate  and  well-controlled  post-marketing  clinical  studies  to  verify  and  describe  the  anticipated  effect  on  irreversible
morbidity  or  mortality  or  other  clinical  benefit.  Products  receiving  accelerated  approval  may  be  subject  to  expedited
withdrawal procedures if the sponsor fails to conduct the required post-marketing studies or if such studies fail to verify the
predicted clinical benefit. In addition, the FDA currently requires as a condition for accelerated approval pre-approval of
promotional materials, which could adversely impact the timing of the commercial launch of the product.

Fast  Track  designation,  Breakthrough  Therapy  designation,  priority  review,  and  accelerated  approval  do  not
change  the  standards  for  approval,  but  may  expedite  the  development  or  approval  process.  Even  if  a  product  candidate
qualifies for one or more of these programs, the FDA may later decide that the product no longer meets the conditions for
qualification or decide that the time period for FDA review or approval will not be shortened.

Orphan Drug Designation and Exclusivity

Under the Orphan Drug Act, the FDA may grant orphan designation to a drug intended to treat a rare disease or
condition,  defined  as  a  disease  or  condition  with  a  patient  population  of  fewer  than  200,000  individuals  in  the  United
States,  or  a  patient  population  greater  than  200,000  individuals  in  the  United  States  and  when  there  is  no  reasonable
expectation that the cost of developing and making available the drug in the United States will be recovered from sales in
the  United  States  for  that  drug.  Orphan  drug  designation  must  be  requested  before  submitting  an  NDA.  After  the  FDA
grants  orphan  drug  designation,  the  generic  identity  of  the  therapeutic  agent  and  its  potential  orphan  use  are  disclosed
publicly by the FDA.

If a product that has orphan drug designation subsequently receives the first FDA approval for a particular active
ingredient  for  the  disease  for  which  it  has  such  designation,  the  product  is  entitled  to  orphan  product  exclusivity,  which
means that the FDA may not approve any other applications, including a full NDA, to market the same drug for the same
indication for seven years, except in limited circumstances, such as a showing of clinical superiority to the product with
orphan drug exclusivity or if the FDA finds that the holder of the orphan drug exclusivity has not shown that it can assure
the availability of sufficient quantities of the orphan drug to meet the needs of patients with the disease or condition for
which the drug was designated. Orphan drug exclusivity does not prevent the FDA from approving a different drug for the
same disease or condition, or the same drug for a different disease or condition. Among the other benefits of orphan drug
designation are tax credits for certain research and a waiver of the NDA application user fee.

A designated orphan drug many not receive orphan drug exclusivity if it is approved for a use that is broader than
the indication for which it received orphan designation. In addition, orphan drug exclusive marketing rights in the United
States may be lost if the FDA later determines that the request for designation was materially defective or, as noted above,
if a second applicant demonstrates that its product is clinically superior to the approved product with orphan exclusivity or
the  manufacturer  of  the  approved  product  is  unable  to  assure  sufficient  quantities  of  the  product  to  meet  the  needs  of
patients with the rare disease or condition.

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Rare Pediatric Disease Priority Review Voucher Program

In  2012,  Congress  authorized  the  FDA  to  award  priority  review  vouchers  to  sponsors  of  certain  rare  pediatric
disease product applications. This program is designed to encourage development of new drug and biological products for
prevention  and  treatment  of  certain  rare  pediatric  diseases.  Specifically,  under  this  program,  a  sponsor  who  receives  an
approval for a drug or biologic for a “rare pediatric disease” may qualify for a voucher that can be redeemed to receive a
priority review of a subsequent marketing application for a different product. The sponsor of a rare pediatric disease drug
product receiving a priority review voucher may transfer (including by sale) the voucher to another sponsor. The voucher
may be further transferred any number of times before the voucher is used, as long as the sponsor making the transfer has
not yet submitted the application. The FDA may also revoke any priority review voucher if the rare pediatric disease drug
for which the voucher was awarded is not marketed in the U.S. within one year following the date of approval.

For  purposes  of  this  program,  a  “rare  pediatric  disease”  is  a  (a)  serious  or  life-threatening  disease  in  which  the
serious  or  life-threatening  manifestations  primarily  affect  individuals  aged  from  birth  to  18  years,  including  age  groups
often  called  neonates,  infants,  children,  and  adolescents;  and  (b)  rare  diseases  or  conditions  within  the  meaning  of  the
Orphan  Drug  Act.  Congress  has  only  authorized  the  Rare  Pediatric  Disease  Priority  Review  Voucher  program  until
September  30,  2024.  Consequently,  sponsors  of  marketing  applications  approved  after  that  date  will  not  receive  the
voucher  unless  Congress  reauthorizes  the  Rare  Pediatric  Disease  Priority  Review  Voucher  program  before  that  time.
However, even if the program is not reauthorized, if a drug candidate receives Rare Pediatric Disease Designation before
October  1,  2024,  the  sponsor  of  the  marketing  application  for  such  drug  will  be  eligible  to  receive  a  voucher  if  the
application for the designated drug is approved by the FDA before October 1, 2026.

Post-approval Requirements

Drug  products  manufactured  or  distributed  pursuant  to  FDA  approvals  are  subject  to  pervasive  and  continuing
regulation  by  the  FDA,  including,  among  other  things,  requirements  relating  to  record-keeping,  reporting  of  adverse
experiences,  periodic  reporting,  product  sampling  and  distribution,  and  advertising  and  promotion  of  the  product.  After
approval, most changes to the approved product, such as adding new indications or other labeling claims, are subject to
prior  FDA  review  and  approval.  There  also  are  continuing,  annual  program  fees  for  any  marketed  products.  Drug
manufacturers and 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 cGMP, which impose certain procedural and documentation requirements upon us and our third-party manufacturers.
Changes to the manufacturing process are strictly regulated, and, depending on the significance of the change, may require
prior FDA approval before being implemented. FDA regulations also require investigation and correction of any deviations
from  cGMP  and  impose  reporting  requirements.  Accordingly,  manufacturers  must  continue  to  expend  time,  money  and
effort  in  the  area  of  production  and  quality  control  to  maintain  compliance  with  cGMP  and  other  aspects  of  regulatory
compliance.

The    FDA    may    withdraw    approval    if    compliance    with    regulatory    requirements    and    standards    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, or 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 studies to assess new safety risks; or imposition of distribution restrictions or
other restrictions under a REMS program. Other potential consequences include, among other things:

● restrictions on the marketing or manufacturing of the product, complete withdrawal of the product from the

market or product recalls;

● fines, warning letters, or untitled letters;

● clinical holds on clinical studies;

● refusal    of    the    FDA  to    approve    pending    applications    or  supplements    to  approved    applications,    or

suspension or revocation of product approvals;

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

● consent    decrees,    corporate    integrity    agreements,    debarment    or    exclusion    from    federal    healthcare

programs;

● mandated    modification    of    promotional    materials    and    labeling    and    the    issuance    of    corrective

information;

● the  issuance  of  safety  alerts,  Dear  Healthcare  Provider  letters,  press  releases  and  other  communications

containing warnings or other safety information about the product; or

● injunctions or the imposition of civil or criminal penalties.

The FDA closely regulates the marketing, labeling, advertising and promotion of drug products. A company can
make only those claims relating to safety and efficacy, purity and potency that are approved by the FDA and in accordance
with  the  provisions  of  the  approved  label.  The  FDA  and  other  agencies  actively  enforce  the  laws  and  regulations
prohibiting the promotion of off-label uses. Failure to comply with these requirements can result in, among other things,
adverse  publicity,  warning  letters,  corrective  advertising  and  potential  civil  and  criminal  penalties.  Physicians  may
prescribe, in their independent professional medical judgment, legally available products for uses that are not described in
the product’s labeling and that differ from those tested by us and approved by the FDA. Physicians may believe that such
off-label uses are the best treatment for many patients in varied circumstances. The FDA does not regulate the behavior of
physicians in their choice of treatments. The FDA does, however, restrict manufacturer’s communications on the subject of
off-label use of their products. However, companies may share truthful and not misleading information that is otherwise
consistent with a product’s FDA-approved labelling.

Marketing Exclusivity

Market  exclusivity  provisions  authorized  under  the  FDCA  can  delay  the  submission  or  the  approval  of  certain
marketing  applications.  The  FDCA  provides  a  five-year  period  of  non-patent  marketing  exclusivity  within  the  United
States to the first applicant to obtain approval of an NDA for a new chemical entity. A drug is a new chemical entity if the
FDA  has  not  previously  approved  any  other  new  drug  containing  the  same  active  moiety,  which  is  the  molecule  or  ion
responsible for the action of the drug substance. During the exclusivity period, the FDA may not approve or even accept
for review an abbreviated new drug application (ANDA), or an NDA submitted under Section 505(b)(2) (505(b)(2) NDA),
submitted  by  another  company  for  another  drug  based  on  the  same  active  moiety,  regardless  of  whether  the  drug  is
intended for the same indication as the original innovative drug or for another indication, where the applicant does not own
or have a legal right of reference to all the data required for approval. However, an application may be submitted after four
years if it contains a certification of patent invalidity or non-infringement to one of the patents listed with the FDA by the
innovator NDA holder.

The FDCA alternatively provides three years of marketing exclusivity for an NDA, or supplement to an existing
NDA if new clinical investigations, other than bioavailability studies, that were conducted or sponsored by the applicant
are deemed by the FDA to be essential to the approval of the application, for example new indications, dosages or strengths
of an existing drug. This three-year exclusivity covers only the modification for which the drug received approval on the
basis  of  the  new  clinical  investigations  and  does  not  prohibit  the  FDA  from  approving  ANDAs  or  505(b)(2)  NDAs  for
drugs containing the active agent for the original indication or condition of use. Five-year and three-year exclusivity will
not delay the submission or approval of a full NDA. However, an applicant submitting a full NDA would be required to
conduct or obtain a right of reference to any preclinical studies and adequate and well-controlled clinical trials necessary to
demonstrate safety and effectiveness.

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Pediatric exclusivity is another type of marketing exclusivity available in the United States. Pediatric exclusivity
  provides    for    an    additional    six    months    of    marketing    exclusivity    attached    to    another    period    of  exclusivity  if  a
sponsor conducts clinical trials in children in response to a written request from the FDA. The issuance of a written request
does  not  require  the  sponsor  to  undertake  the  described  clinical  trials.  In  addition,  orphan  drug  exclusivity,  as  described
above, may offer a seven-year period of marketing exclusivity, except in certain circumstances.

FDA Approval and Regulation of Companion Diagnostics

If safe and effective use of a therapeutic product depends on an in vitro diagnostic medical device, then the FDA
generally will require approval or clearance of that diagnostic, known as an in vitro companion diagnostic device, at the
same time that the FDA approves the therapeutic product. In August 2014, the FDA issued final guidance clarifying the
requirements that will apply to approval of therapeutic products and in vitro companion diagnostic devices. According to
the  guidance,  for  novel  drugs,  an  in  vitro  companion  diagnostic  device  and  its  corresponding  therapeutic  should  be
approved or cleared contemporaneously by the FDA for the use indicated in the therapeutic product’s labeling.

If the FDA determines that an in vitro companion diagnostic device is essential to the safe and effective use of a
novel  therapeutic  product  or  indication,  the  FDA  generally  will  not  approve  the  therapeutic  product  or  new  therapeutic
product indication if the in vitro companion diagnostic device is not approved or cleared for that indication. Approval or
clearance of the in vitro  companion  diagnostic  device  will  ensure  that  the  device  has  been  adequately  evaluated  and  has
adequate performance characteristics in the intended population.  

Under the FDCA, in vitro diagnostics, including in vitro companion diagnostic devices, are generally regulated as
medical devices. In the United States, the FDCA and its implementing regulations, and other federal and state statutes and
regulations govern, among other things, medical device design and development, preclinical and clinical testing, premarket
clearance  or  approval,  registration  and  listing,  manufacturing,  labeling,  storage,  advertising  and  promotion,  sales  and
distribution,  export  and  import,  and  post-market  surveillance.  Unless  an  exemption  applies,  diagnostic  tests  require
marketing clearance or approval from the FDA prior to commercial distribution. The two primary types of FDA marketing
authorization  applicable  to  a  medical  device  are  premarket  notification,  also  called  510(k)  clearance,  and  premarket
approval, or PMA approval. The FDA has stated that it generally requires in vitro companion diagnostic devices intended
to select the patients who will respond to a drug to obtain a PMA for that diagnostic simultaneously with approval of the
drug.  

The PMA process, including the gathering of clinical and preclinical data and the submission to and review by the
FDA, can take several years or longer. It involves a rigorous premarket review during which the applicant must prepare and
provide the FDA with reasonable assurance of the device’s safety and effectiveness and information about the device and
its components regarding, among other things, device design, manufacturing and labeling. In addition, PMAs for certain
devices  must  generally  include  the  results  from  extensive  preclinical  and  adequate  and  well-controlled  clinical  trials  to
establish the safety and effectiveness of the device for each indication for which FDA approval is sought. In particular, for
a diagnostic, a PMA application typically requires data regarding analytical and clinical validation studies. As part of the
PMA  review,  the  FDA  will  typically  inspect  the  manufacturer’s  facilities  for  compliance  with  the  Quality  System
Regulation, or QSR, which imposes elaborate testing, control, documentation and other quality assurance requirements.

PMA  approval  is  not  guaranteed,  and  the  FDA  may  ultimately  respond  to  a  PMA  submission  with  a  not
approvable determination based on deficiencies in the application and require additional clinical trial or other data that may
be  expensive  and  time-consuming  to  generate  and  that  can  substantially  delay  approval.  If  the  FDA’s  evaluation  of  the
PMA application is favorable, the FDA typically issues an approvable letter requiring the applicant’s agreement to specific
conditions, such as changes in labeling, or specific additional information, such as submission of final labeling, in order to
secure final approval of the PMA. If the FDA’s evaluation of the PMA or manufacturing facilities is not favorable, the FDA
will deny approval of the PMA or issue a not approvable letter. A not approvable letter will outline the deficiencies in the
application  and,  where  practical,  will  identify  what  is  necessary  to  make  the  PMA  approvable.  The  FDA  may  also
determine that additional clinical trials are necessary, in which case the PMA approval may be delayed for several months
or years while the trials are conducted and then the data submitted in an amendment to the PMA. If the FDA concludes that
the applicable criteria have been met, the FDA will issue a PMA for the approved indications, which can be more

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limited than those originally sought by the applicant. The PMA can include post-approval conditions that the FDA believes
necessary  to  ensure  the  safety  and  effectiveness  of  the  device,  including,  among  other  things,  restrictions  on  labeling,
promotion,  sale  and  distribution.  Once  granted,  PMA  approval  may  be  withdrawn  by  the  FDA  if  compliance  with  post
approval requirements, conditions of approval or other regulatory standards are not maintained or problems are identified
following initial marketing.

After a device is placed on the market, it remains subject to significant regulatory requirements. Medical devices
may be marketed only for the uses and indications for which they are cleared or approved. Device manufacturers must also
establish  registration  and  device  listings  with  the  FDA.  A  medical  device  manufacturer’s  manufacturing  processes  and
those  of  its  suppliers  are  required  to  comply  with  the  applicable  portions  of  the  QSR,  which  cover  the  methods  and
documentation of the design, testing, production, processes, controls, quality assurance, labeling, packaging and shipping
of medical devices. Domestic facility records and manufacturing processes are subject to periodic unscheduled inspections
by the FDA. The FDA also may inspect foreign facilities that export products to the United States.

Regulation of Combination Products in the United States

Certain  product  are  comprised  of  components,  such  as  drug  components  and  device  components,  that  would
normally  be  subject  to  different  regulatory  frameworks  by  the  FDA  and  frequently  regulated  by  different  centers  at  the
FDA. These products are known as combination products. Under the FDCA, the FDA is charged with assigning a center
with primary jurisdiction, or a lead center, for review of a combination product. The determination of which center will be
the lead center is based on the “primary mode of action” of the combination product. Thus, if the primary mode of action of
a drug-device combination product is attributable to the drug product, the FDA center responsible for premarket review of
the drug product would have primary jurisdiction for the combination product. The FDA has also established the Office of
Combination  Products  to  address  issues  surrounding  combination  products  and  provide  more  certainty  to  the  regulatory
review process. That office serves as a focal point for combination product issues for agency reviewers and industry. It is
also  responsible  for  developing  guidance  and  regulations  to  clarify  the  regulation  of  combination  products,  and  for
assignment of the FDA center that has primary jurisdiction for review of combination products where the jurisdiction is
unclear or in dispute. A combination product with a primary mode of action attributable to the drug component generally
would be reviewed and approved pursuant to the drug approval processes set forth in the FDCA. In reviewing the NDA for
such  a  product,  however,  FDA  reviewers  would  consult  with  their  counterparts  in  the  device  center  to  ensure  that  the
device component of the combination product met applicable requirements regarding safety, effectiveness, durability and
performance. In addition, under FDA regulations, combination products are subject to cGMP requirements applicable to
both drugs and devices, including the QSR applicable to medical devices.

Regulation and Procedures Governing Approval of Medicinal Products in the European Union

In  addition  to  regulations  in  the  United  States,  we  will  be  subject  to  a  variety  of  foreign  regulations  governing
clinical  trials  and  commercial  sales  and  distribution  of  setmelanotide  to  the  extent  we  choose  to  sell  any  setmelanotide
outside of the United States. Whether or not we obtain FDA approval for a product, we must obtain approval of a product
by  equivalent  competent  authorities  in  foreign  jurisdictions  before  we  can  commence  clinical  trials  or  marketing  of  the
product in those countries. The approval process varies from country to country and the time may be longer or shorter than
that required for FDA approval. The requirements governing the conduct of clinical trials, product licensing, pricing and
reimbursement vary greatly from country to country. As in the United States, post-approval regulatory requirements, such
as those regarding product manufacture, marketing, pharmacovigilance, promotion, advertising or distribution would apply
to any product that is approved outside the United States.

The  process  governing  the  marketing  authorization  of  medicinal  products  in  the  European  Union  entails
satisfactory completion of preclinical studies and adequate and well-controlled clinical trials to establish the safety, quality
and  efficacy  of  the  medicinal  product  for  each  proposed  therapeutic  indication.  It  also  requires  the  submission  to  the
relevant competent authorities of a marketing authorization application, or MAA, and granting of a marketing authorization
by these authorities before the product can be marketed and sold in the European Union.

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Clinical Trial Approval

The Clinical Trials Directive 2001/20/EC, the Directive 2005/28/EC on Good Clinical Practice, or GCP, and the
related  national  implementing  provisions  of  the  individual  EU  member  states  govern  the  system  for  the  approval  of
conduct  of  clinical  trials  in  the  European  Union.  Under  this  system,  an  applicant  must  obtain  prior  approval  from  the
competent  national  authority  of  the  EU  member  states  in  which  the  clinical  trial  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 new Clinical Trials Regulation, (EU) No 536/2014 (Clinical Trials Regulation) was adopted.
The Regulation is expected to enter into force by the end of 2021, but this could be delayed. The Clinical Trials Regulation
will be 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 European Union will continue to be bound by currently applicable provisions until the
new Clinical Trials Regulation becomes applicable. The extent to which on-going clinical trials will be governed by the
Clinical Trials Regulation will depend on when the Clinical Trials Regulation becomes applicable and on the duration of
the individual clinical trial. If a clinical trial continues for more than three years from the day on which the Clinical Trials
Regulation becomes applicable the Clinical Trials Regulation will at that time begin to apply to the clinical trial.

The new Clinical Trials Regulation aims to simplify and streamline the approval of clinical trials in the European
Union. The Clinical Trials Regulation introduces a complete overhaul of the existing legislation governing clinical trials for
medicinal  products  in  the  EU.  This  includes  a  new  coordinated  procedure  for  authorization  of  clinical  trials  that  is
reminiscent  of  the  mutual  recognition  procedure  for  marketing  authorization  of  medicinal  products,  and  increased
obligations  on  sponsors  to  publish  clinical  trial  results.  The  main  characteristics  of  the  regulation  include:  a  streamlined
application procedure via a single entry point, the “EU portal”; 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  (member  states
concerned). Part II is assessed separately by each member state concerned. 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 EU member state. However, overall related timelines will be
defined by the Clinical Trials Regulation.

Marketing Authorization

To obtain a marketing authorization for a product under European Union regulatory systems, an applicant must
submit an MAA either under a centralized procedure administered by the European Medicines Agency, or EMA, or one of
the  procedures  administered  by  competent  authorities  in  the  EU  member  states  (decentralized  procedure,  national
procedure or mutual recognition procedure). A marketing authorization may be granted only to an applicant established in
the  European  Union.  Regulation  (EC)  No  1901/2006  provides  that  prior  to  obtaining  a  marketing  authorization  in  the
European  Union,  applicants  have  to  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  (1)  a  product-
specific waiver, (2) a class waiver or (3) a deferral for one or more of the measures included in the PIP.  By a decision of 15
June  2018,  the  EMA  formally  accepted  the  PIPs  for  setmelanotide  in  the  treatment  of  appetite  and  general  nutritional
disorders.  This included the deferral and waiver requested by us.  

The centralized procedure provides for the grant of a single marketing authorization by the European Commission
that  is  valid  for  all  EEA  member  states  (i.e.,  the  member  states  of  the  EU  in  addition  to  Iceland,  Liechtenstein  and
Norway).  Pursuant  to  Regulation  (EC)  No  726/2004,  the  centralized  procedure  is  compulsory  for  specific  products,
including for medicines produced by certain biotechnological processes, products designated as orphan medicinal products,
advanced  therapy  products  and  products  with  a  new  active  substance  indicated  for  the  treatment  of  certain  diseases,
including  products  for  the  treatment  of  cancer.  Medicinal  products  that  contain  a  new  active  substance  that  is  not  yet
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the EEA and medicinal products that constitute a significant therapeutic, scientific or technical innovation or for which a
centralized process is in the interest of patients within the EU fall within the optional scope of the centralized marketing
authorization procedure.

Under  the  centralized  procedure,  the  EMA’s  Committee  for  Human  Medicinal  Products,  or  the  CHMP,  is
responsible for conducting the initial assessment of a product. The CHMP is also responsible for several post-authorization
and maintenance activities, such as the assessment of modifications or extensions to an existing marketing authorization.
Under  the  centralized  procedure  in  the  European  Union,  the  maximum  timeframe  for  the  evaluation  of  an  MAA  by  the
CHMP 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 evaluation 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  in  particular  from  the
viewpoint  of  therapeutic  innovation.  If  the  CHMP  accepts  such  request,  the  time  limit  of  210  days  will  be  reduced  to
150 days but it is possible that the CHMP can revert to the standard time limit for the centralized procedure if it considers
that it is no longer appropriate to conduct an accelerated assessment. At the end of this period, the EMA’s CHMP provides
a  scientific  opinion  on  whether  or  not  a  marketing  authorization  should  be  granted  in  relation  to  a  medicinal  product.
Within  15  calendar  days  of  receipt  of  a  final  opinion  from  the  CHMP,  the  European  Commission  must  prepare  a  draft
decision concerning an application for marketing authorization. This draft decision must take the opinion and any relevant
provisions of EU law into account. Before arriving at a final decision on an application for centralized authorization of a
medicinal product the European Commission must consult the Standing Committee on Medicinal Products for Human Use.
The Standing Committee is composed of representatives of the EU member states and chaired by a non-voting European
Commission representative. The European Parliament also has a related “droit de regard”. The European Parliament’s role
is to ensure that the European Commission has not exceeded its powers in deciding to grant or refuse to grant a marketing
authorization.

The EMA offers the possibility to medicinal product developers to participate in a voluntary scheme of enhanced
interaction and early dialogue with the EMA, to enhance support for the development of medicinal products that target an
unmet medical need. This voluntary scheme is called PRIority MEdicine support scheme, or PRIME. The PRIME scheme
focuses  on  medicines  that  may  offer  a  major  therapeutic  advantage  over  existing  treatments,  or  benefit  patients  without
treatment options. These medicines are considered priority medicines by the EMA. To be accepted for PRIME, a medicine
has to show its potential to benefit patients with unmet medical needs based on early clinical data. The benefits of a PRIME
designation  include  the  appointment  of  an  EMA  Committee  for  Medicinal  Products  for  Human  Use  rapporteur  before
submission of the marketing authorization application, early dialogue and scientific advice at key development milestones,
and the potential to qualify products for accelerated review earlier in the application process. PRIME designation do not
however change the standards for product approval, and there is no assurance that any such designation or eligibility will
result in expedited review or approval.

Unlike  the  centralized  authorization  procedure,  the  decentralized  marketing  authorization  procedure  requires  a
submission  of  a  separate  application  to,  and  leads  to  grant  of  separate  marketing  authorizations  by,  the  competent
authorities of each EU member state in which the product is to be marketed. This application is identical to the application
that would be submitted to the EMA for authorization through the centralized procedure. The assessment of the application
for marketing authorization is conducted by the reference EU member state.  This reference EU member state prepares a
draft  assessment  and  drafts  of  the  related  materials  within  120  days  after  receipt  of  a  valid  application.  The  resulting
assessment report is submitted to the concerned EU member states who, within 90 days of receipt, must decide whether to
approve the assessment report and related materials. If a concerned EU member state cannot approve the assessment report
and related materials due to concerns relating to a potential serious risk to public health, disputed elements may be referred
to the Heads of Medicines Agencies, or CMDh for review.  This review, which may also be escalated to the CHMP in case
of disagreement in CMDh would result in a decision by the European Commission, whose decision is binding on all EU
member states.

The mutual recognition procedure permits companies that have a medicinal product already authorized in one EU
member state to apply for this authorization to be recognized by the competent authorities in other EU member states. The
national  marketing  authorization  procedure  is  founded  on  the  same  basic  EU  regulatory  process  as  the  other  marketing
authorization procedures discussed in this Section. The national marketing authorization procedure, which is increasingly

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rare, permits a company to submit an application to the competent authority of a single EU member state and, if successful,
to obtain a marketing authorization that is valid only in this EU member state.

Regulatory Data Protection in the European Union

In  the  European  Union,  innovative  medicinal  products  authorized  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  the  centralized  authorization  procedure.  Data  exclusivity  prevents  applicants  for
authorization  of  generics  or  biosimilars  of  these  innovative  products  from  referencing  the  innovator’s  data  to  assess  a
generic (abbreviated) or biosimilar application for a period of eight years. During an additional two-year period of market
exclusivity, an application for the marketing authorization of a generic or biosimilar medicinal product can be submitted
and  a  related  marketing  authorization  may  be  granted,  and  the  innovator’s  data  may  be  referenced,  but  no  generic  or
biosimilar medicinal product can be placed on the European Union 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  medicinal  product  is  granted  data  and  market  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 tests, preclinical tests 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  further  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 European Union 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).

Orphan Drug Designation and Exclusivity

Regulation  (EC)  No.  141/2000,  as  implemented  by  Regulation  (EC)  No.  847/2000  provides  that  a  medicinal
product 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 European Union when the application is made, or (2) a life-threatening,
seriously debilitating or serious and chronic condition in the European Union and that without incentives it is unlikely that
the  marketing  of  the  medicinal  product  in  the  European  Union  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 European Union or, if such
method exists, the medicinal product 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  in  addition  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  EU
member  states  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

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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

Regulatory Requirements after a Marketing Authorization has been Obtained

In case an authorization for a medicinal product in the European Union 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:

● Compliance  with  the  European  Union’s  stringent  pharmacovigilance  or  safety  reporting  rules  must  be

ensured. These rules 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  European  Union  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  European  Union  cGMP  standards  when  manufacturing  medicinal  products  and
active pharmaceutical ingredients, including the manufacture of active pharmaceutical ingredients outside of
the  European  Union  with  the  intention  to  import  the  active  pharmaceutical  ingredients  into  the  European
Union.

● The  advertising  and  promotion  of  medicinal  products  are  subject  to  EU  laws  governing  promotion  of
medicinal  products,  interactions  with  physicians,  misleading  and  comparative  advertising  and  unfair
commercial practices. In addition, other legislation adopted by individual EU member states may apply to the
advertising  and  promotion  of  medicinal  products.  These  laws  require  that  promotional  materials  and
advertising in relation to medicinal products comply with the product’s Summary of Product Characteristics,
or SmPC, as approved by the competent authorities. The SmPC is the document that provides information to
physicians concerning the safe and effective use of the medicinal product. It forms an intrinsic and integral
part of the marketing authorization granted for the medicinal product. Promotion of a medicinal product that
does not comply with the SmPC is considered to constitute off label promotion. The off label promotion of
medicinal products is prohibited in the EU. The applicable laws at EU level and in the individual EU member
states also prohibit the direct to consumer advertising of prescription only medicinal products. Violations of
the  rules  governing  the  promotion  of  medicinal  products  in  the  EU  could  be  penalized  by  administrative
measures, fines and imprisonment. These laws may further limit or restrict the advertising and promotion of
our products to the general public and may also impose limitations on our promotional activities with health
care professionals.

Regulatory Procedure Governing CE marking Companion Diagnostics in the European Union

In the European Union, in vitro  medical  devices  are  required  to  conform  with  the  essential  requirements  of  the
European  Union  Directive  on  in  vitro  diagnostic  medical  devices  (Directive  98/79/EC,  as  amended).  To  demonstrate
compliance  with  the  essential  requirements,  the  manufacturer  must  undergo  a  conformity  assessment  procedure.  The
conformity assessment varies according to the type of in vitro diagnostic medical device. The conformity assessment of in
vitro diagnostic medical devices can require the intervention of a Notified Body, which is an organization designated by the
competent  authorities  of  an  EU  member  state  to  conduct  conformity  assessments.  The  Notified  Body  will  issue  a  CE
Certificate of Conformity following successful completion of a conformity assessment procedure conducted in relation to
the in vitro  diagnostic  medical  device  and  its  manufacturer  and  their  conformity  with  the  requirements  of  the  Directive.
This  Certificate  entitles  the  manufacturer  to  affix  the  CE  mark  to  its  medical  device  after  having  prepared  and  signed  a
related EC Declaration of Conformity. For in vitro diagnostic medical devices which do not require the intervention of a
notified body, the manufacturer can issue an EC Declaration of Conformity based on a self-assessment of the conformity of
its products with the Essential Requirements laid down in the in vitro diagnostic medical device Directive.

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In April 2017, the EU Regulation on In Vitro Diagnostic Medical Devices (Regulation (EU) 2017/746), or IVDR,
was adopted. The IVDR repeals and replaces Directive 98/79/EC. Unlike directives, which must be implemented into the
national laws of the individual EU member states, the IVDR will be directly applicable in the EU member states and on the
basis of the EEA agreement in Iceland, Liechtenstein and Norway. The IVDR is, among other things, intended to establish
a uniform, transparent, predictable and sustainable regulatory framework across the EEA for in vitro  diagnostic  medical
devices and ensure a high level of safety and health while supporting innovation. The IVDR will become applicable on 26
May 2022. Once applicable, the IVDR will introduce new classification rules for in vitro diagnostic medical devices and
new regulatory requirements. The IVDR will also impose increased compliance obligations for manufacturers of in  vitro
diagnostic medical devices to access the EEA market.  Moreover, the scrutiny imposed by notified bodies for the technical
documentation related these devices will increase considerably.

Brexit and the Regulatory Framework in the United Kingdom

Following  a  national  referendum  and  enactment  of  legislation  by  the  government  of  the  United  Kingdom,  the
United Kingdom formally withdrew from the EU on January 31, 2020 (commonly referred to as “Brexit”) and entered into
a  transition  period  which  ended  on  December  31,  2020.  Since  the  expiry  of  the  transition  period,  the  United  Kingdom
operates  under  a  distinct  regulatory  regime.  EU  pharmaceutical  laws  only  apply  to  the  United  Kingdom  in  respect  of
 Northern Ireland (as laid out in the Protocol on Ireland and Northern Ireland). Since January 1, 2021, the EU laws which
have been transposed into UK law through secondary legislation continue to be applicable as “retained EU law”. As there
is no general power to amend these regulations, the UK government has introduced a new Medicines and Medical Devices
Bill which seeks to address  regulatory gaps through  implementing regulations and delegated powers covering the fields of
human medicines, clinical trials of human medicines, veterinary medicines and medical devices. The purpose of the bill is
to enable the existing UK regulatory frameworks to be updated. Although regulatory authorities in the UK have indicated
in  the  bill  that  new  UK  rules  will  closely  align  with  EU  laws,  detailed  proposals  are  yet  to  be  published.    Significant
political and economic uncertainty therefore remains about how much the relationship between the United Kingdom and
EU will differ as a result of the United Kingdom’s withdrawal.  

On  December  24,  2020,  the  United  Kingdom  and  the  EU  announced  that  they  had  agreed  to  the  terms  of  their
future  trading  relationship  in  the  EU—United  Kingdom  Trade  and  Cooperation  Agreement,  or  TCA,  which  has  been
provisionally  applicable  since  January  1,  2021,  but  which  awaits  the  final  agreement  of  the  remaining  27  EU  member
states. While agreement on the terms of the TCA has avoided a “ no deal” Brexit scenario, and provides in principle for
quota-  and  tariff-free  trading  of  goods,  it  is  nevertheless  expected  that  the  TCA  will  result  in  the  creation  of  non-tariff
barriers  (such  as  increased  shipping  and  regulatory  costs  and  complexities)  to  the  trade  in  goods  between  the  United
Kingdom and the EU. Further, the TCA does not provide for the continued free movement of services between the United
Kingdom and the EU and imposes additional restrictions on the free movement of people between the United Kingdom and
the  EU.  The  TCA  includes  provisions  affecting  pharmaceutical  companies  such  as  customs  and  tariffs  in  relation  to
healthcare  products  and  provides  for  the  mutual  recognition  of  Good  Manufacturing  Practice  (GMP)  inspections  of
manufacturing facilities for medicinal products and GMP documents issued. It is important to note however that significant
regulatory  gaps  still  exist  and  the  TCA  does  not  contain  wholesale  mutual  recognition  of  United  Kingdom  and  EU
pharmaceutical regulations and product standards, for example in relation to batch testing and pharmacovigilance, which
remain subject to further bilateral discussions..

Further, the United Kingdom’s withdrawal from the EU has resulted in the relocation of the EMA from the United
Kingdom to the Netherlands. This relocation has caused, and may continue to cause, disruption in the administrative and
medical scientific links between the EMA and the U.K. Medicines and Healthcare products Regulatory Agency, including
delays in granting clinical trial authorization or marketing authorization, disruption of importation and exportation of active
substance and other components of new drug formulations, and disruption of the supply chain for clinical trial product and
final authorized formulations. The cumulative effects of the disruption to the regulatory framework may add considerably
to the development lead time to marketing authorization and commercialization of products in the EU and/or the United
Kingdom.

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Pharmaceutical Coverage and Reimbursement

In the United States and markets in other countries, patients who are prescribed treatments for their conditions and
providers performing the prescribed services generally rely on Government and third-party payors to reimburse all or part
of the associated healthcare costs. Patients are unlikely to use IMCIVREE unless coverage is provided and reimbursement
is adequate to cover a significant portion of the cost of our products. Significant uncertainty exists as to the coverage and
reimbursement status of products approved by the FDA and other government authorities. Sales 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, IMCIVREE and other  product candidates we may develop and obtain approval for in the future.
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,
setmelanotide may not be considered medically necessary or cost effective. A decision by a third-party payor not to cover
IMCIVREE or any of our product candidates, if approved,  could reduce physician utilization of our products and have a
material  adverse  effect  on  our  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.
Third-party reimbursement and coverage may not be available to enable us to maintain price levels sufficient to realize an
appropriate return on our investment in product development.

The containment of healthcare 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.

Outside  the  United  States,  ensuring  adequate  coverage  and  payment  for  setmelanotide  will  face  challenges.
Pricing  of  prescription  pharmaceuticals  is  subject  to  governmental  control  in  many  countries.  Pricing  negotiations  with
governmental  authorities  can  extend  well  beyond  the  receipt  of  regulatory  marketing  approval  for  a  product  and  may
require us to conduct a clinical trial that compares the cost effectiveness of setmelanotide or products to other available
therapies. The conduct of such a clinical trial could be expensive and result in delays in our commercialization efforts.

In the European Union, 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 medicinal product candidate to currently
available therapies or so called Health Technology Assessments, in order to obtain reimbursement or pricing approval. For
example,  the  European  Union  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.
EU member states may approve a specific price for a product or it may instead adopt a system of direct or indirect controls
on  the  profitability  of  the  company  placing  the  product  on  the  market.  Other  EU  member  states  allow  companies  to  fix
their  own  prices  for  products,  but  monitor  and  control  prescription  volumes  and  issue  guidance  to  physicians  to  limit
prescriptions.  The downward pressure on healthcare costs in general, and particularly in relation to

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prescription only medicinal products, has become more intense. As a result, increasingly high barriers are being erected to
the entry of new products.

Health Technology Assessment, or HTA, of medicinal products is, however, becoming an increasingly common
part  of  the  pricing  and  reimbursement  procedures  in  some  EU  member  states,  including  the  United  Kingdom,  France,
Germany, Ireland, Italy, Spain and Sweden. HTA is the procedure according to which the assessment of the public health
impact,  therapeutic  impact  and  the  economic  and  societal  impact  of  use  of  a  given  medicinal  product  in  the  national
healthcare systems of the individual country is conducted. HTA generally focuses on the clinical efficacy and effectiveness,
safety, cost, and cost-effectiveness of individual medicinal products as well as their potential implications for the healthcare
system.  Those  elements  of  medicinal  products  are  compared  with  other  treatment  options  available  on  the  market.  The
outcome of HTA regarding specific medicinal products will often influence the pricing and reimbursement status granted to
these  medicinal  products  by  the  competent  authorities  of  individual  EU  member  states.  The  extent  to  which  pricing  and
reimbursement decisions are influenced by the HTA of the specific medicinal product varies between EU member states. In
addition,  pursuant  to  Directive  2011/24/EU  on  the  application  of  patients’  rights  in  cross-border  healthcare,  a  voluntary
network  of  national  authorities  or  bodies  responsible  for  HTA  in  the  individual  EU  member  states  was  established.  The
purpose of the network is to facilitate and support the exchange of scientific information concerning HTAs. This may lead
to harmonization of the criteria taken into account in the conduct of HTAs between EU member states and in pricing and
reimbursement decisions and may negatively affect price in at least some EU member states.

As  a  further  step  in  this  direction,  on  January  31,  2018,  the  European  Commission  adopted  a  proposal  for  a
regulation on HTA. This legislative proposal is intended to boost cooperation among EU member states in assessing health
technologies, including new medicinal products, and providing the basis for cooperation at the EU level for joint clinical
assessments in these areas. The proposal would permit EU member states to use common HTA tools, methodologies, and
procedures across the EU, working together in four main areas, including joint clinical assessment of the innovative health
technologies with the most potential impact for patients, joint scientific consultations whereby developers can seek advice
from  HTA  authorities,  identification  of  emerging  health  technologies  to  identify  promising  technologies  early,  and
continuing voluntary cooperation in other areas. Individual EU member states will continue to be responsible for assessing
non-clinical  (e.g.,  economic,  social,  ethical)  aspects  of  health  technology,  and  making  decisions  on  pricing  and
reimbursement. The European Commission has stated that the role of the draft HTA regulation is not to influence pricing
and reimbursement decisions in the individual EU member states. However, this consequence cannot be excluded.

Healthcare Laws and Regulations

We  are  subject  to  healthcare  regulation  and  enforcement  by  the  federal  government  and  the  states  where  we
conduct business. These laws include, without limitation, state and federal anti-kickback, fraud and abuse, false claims, and
physician  and  other  healthcare  provider  payment  transparency  laws  and  regulations.  Foreign  governments  also  have
comparable regulations.

The  federal  Anti-Kickback  Statute  prohibits,  among  other  things,  any  person  from  knowingly  and  willfully
offering, soliciting, receiving or providing remuneration, directly or indirectly, to induce either the referral of an individual,
for an item or service or the purchasing or ordering of a good or service, for which payment may be made under federal
healthcare  programs  such  as  the  Medicare  and  Medicaid  programs.  The  Anti-Kickback  Statute  is  subject  to  evolving
interpretations.  In  the  past,  the  government  has  enforced  the  Anti-Kickback  Statute  to  reach  large  settlements  with
healthcare  companies  based  on  sham  consulting  and  other  financial  arrangements  with  physicians.  Further,  a  person  or
entity  does  not  need  to  have  actual  knowledge  of  these  statutes  or  specific  intent  to  violate  them  to  have  committed  a
violation. The majority of states also have anti-kickback laws which establish similar prohibitions and in some cases may
apply to items or services reimbursed by any third-party payor, including commercial insurers.

Additionally,  the  civil  False  Claims  Act  prohibits  knowingly  presenting  or  causing  the  presentation  of  a  false,
fictitious or fraudulent claim for payment to the U.S. government. Actions under the False Claims Act may be brought by
the  Attorney  General  or  as  a  qui  tam  action  by  a  private  individual  in  the  name  of  the  government.  In  addition,  the
government  may  assert  that  a  claim  including  items  or  services  resulting  from  a  violation  of  the  federal  Anti-Kickback
Statute constitutes a false or fraudulent claim for purposes of the federal False Claims Act. Violations of the False Claims
Act can result in very significant monetary penalties and treble damages. The federal government is using the False Claims
Act,  and  the  accompanying  threat  of  significant  liability,  in  its  investigation  and  prosecution  of  pharmaceutical  and
biotechnology companies in connection with the promotion of products for unapproved uses and other sales and marketing

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practices.  The  government  has  obtained  multi-billion  dollar  settlements  under  the  False  Claims  Act  in  addition  to
individual criminal convictions under applicable criminal statutes. We expect that the government will continue to devote
substantial resources to investigating healthcare providers’ and manufacturers’ compliance with applicable fraud and abuse
laws.

The federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, created new federal criminal
statutes that prohibit, among other things, knowingly and willfully executing a scheme to defraud any healthcare benefit
program and making false statements relating to healthcare matters. Similar to the federal Anti-Kickback Statute, a person
or entity does not need to have actual knowledge of these statutes or specific intent to violate them to have committed a
violation.

The federal civil monetary penalties laws, impose civil fines for, among other things, the offering or transfer of
remuneration  to  a  Medicare  or  state  healthcare  program  beneficiary  if  the  person  knows  or  should  know  it  is  likely  to
influence the beneficiary’s selection of a particular provider, practitioner, or supplier of services reimbursable by Medicare
or a state healthcare program, unless an exception applies.

In  addition,  there  has  been  increased  federal  and  state  regulation  of  payments  made  to  physicians  and  other
healthcare providers. The Physician Payments Sunshine Act imposes new reporting requirements on drug manufacturers
for payments made by them to physicians (defined to include doctors, dentists, optometrists, podiatrists and chiropractors),
certain health care professionals beginning in 2022 and teaching hospitals, as well as ownership and investment interests
held  by  physicians  and  their  immediate  family  members.  Drug  manufacturers  must  report  such  payments  to  the
government by the 90th day of each calendar year.

State and foreign laws and regulations restrict business practices in the pharmaceutical industry and complicate
our  compliance  efforts.  For  example,  some  states  require  companies  to  comply  with  the  pharmaceutical  industry’s
voluntary  compliance  guidelines  and  the  federal  government’s  compliance  guidance  or  otherwise  restrict  payments  to
healthcare  providers  and  other  potential  referral  sources.  Some  states  require  manufacturers  to  file  reports  relating  to
pricing  and  marketing  information.  Some  state  and  local  governments  require  the  public  registration  of  pharmaceutical
sales representatives. Certain states also mandate implementation of commercial compliance programs, impose restrictions
on  drug  manufacturer  marketing  practices  and/or  require  the  tracking  and  reporting  of  gifts,  compensation  and  other
remuneration to physicians.

Violation of any of such laws or any other governmental regulations that may apply to drug manufacturers may
result  in  penalties,  including,  without  limitation,  civil  and  criminal  penalties,  damages,  fines,  the  curtailment  or
restructuring of our operations, exclusion from participation in federal and state healthcare programs and imprisonment.

In  the  EU,  interactions  between  pharmaceutical  companies  and  physicians  are  also  governed  by  strict  laws,
regulations, industry self-regulation codes of conduct and physicians’ codes of professional conduct in the individual EU
member  states.  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 prohibited in the EU. The provision
of benefits or advantages to physicians is also governed by the national anti-bribery laws of the EU member states. One
example is the UK Bribery Act 2010. This Act applies to any company incorporated in or “carrying on business” in the
UK,  irrespective  of  where  in  the  world  the  alleged  bribery  activity  occurs.  This  Act  could  have  implications  for  our
interactions  with  physicians  in  and  outside  the  UK.  Violation  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  must  often  be  the  subject  of  prior  notification  and  approval  by  the  physician’s  employer,  their  competent
professional  organization,  and/or  the  competent  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 individual EU member
states.  Failure  to  comply  with  these  requirements  could  result  in  reputational  risk,  public  reprimands,  administrative
penalties, fines or imprisonment.

Failure to comply with the EU member state laws implementing the Community Code on medicinal products, and

EU rules governing the promotion of medicinal products, interactions with physicians, misleading and comparative

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advertising  and  unfair  commercial  practices,  with  the  EU  member  state  laws  that  apply  to  the  promotion  of  medicinal
products, statutory health insurance, bribery and anti-corruption or with other applicable regulatory requirements can result
in enforcement action by the EU member state authorities, which may include any of the following: fines, imprisonment,
orders forfeiting products or prohibiting or suspending their supply to the market, or requiring the manufacturer to issue
public warnings, or to conduct a product recall.

Data Privacy and Security

Numerous  federal,  state  and  foreign  laws  and  regulations  also  govern  the  privacy  and  security  of  health
information and the collection, use, disclosure, and protection of health-related and other personal information, including
state  data  breach  notification  laws,  state  health  information  and/or  genetic  privacy  laws,  and  federal  and  state  consumer
protection laws, such as Section 5 of the FTC Act, many of which differ from each other in significant ways and often are
not  preempted  by  HIPAA,  thus  complicating  compliance  efforts.  Compliance  with  these  laws  is  difficult,  constantly
evolving, and time consuming, and companies that do not comply with these state laws may face civil penalties.

For  example,  HIPAA,  as  amended,  regulations  implemented  thereunder,  impose  obligations  with  respect  to
safeguarding the privacy, security and transmission of individually identifiable health information. We may obtain health
information from third parties (including research institutions from which we obtain clinical trial data) that are subject to
privacy and security requirements under HIPAA. Although we are not directly subject to HIPAA – other than with respect
to providing certain employee benefits – we could potentially be subject to criminal penalties if we, our affiliates, or our
agents  knowingly  obtain,  use,  or  disclose  individually  identifiable  health  information  maintained  by  a  HIPAA-covered
entity in a manner that is not authorized or permitted by HIPAA. Further, in California, the California Consumer Privacy
Act,  or  the  CCPA,  took  effect  on  January  1,  2020.  The  CCPA  establishes  certain  requirements  for  data  use  and  sharing
transparency and creates new data privacy rights for consumers.  These laws and regulations are evolving and subject to
interpretation,  and  may  impose  limitations  on  our  activities  or  otherwise  adversely  affect  our  business.  Further,  the
California  Privacy  Rights  Act  (“CPRA”)  was  recently  voted  into  law  by  California  residents.  The  CPRA  significantly
amends the CCPA, and imposes additional data protection obligations on covered companies doing business in California,
including  additional  consumer  rights  processes  and  opt  outs  for  certain  uses  of  sensitive  data.  It  also  creates  a  new
California data protection agency specifically tasked to enforce the law, which would likely result in increased regulatory
scrutiny of California businesses in the areas of data protection and security. The substantive requirements for businesses
subject to the CPRA will go into effect on January 1, 2023, and become enforceable on July 1, 2023. Similarly, there are a
number  of  legislative  proposals  in  the  European  Union,  the  United  States,  at  both  the  federal  and  state  level,  as  well  as
other  jurisdictions  that  could  impose  new  obligations  or  limitations  in  areas  affecting  our  business.  In  addition,  some
countries are considering or have passed legislation implementing data protection requirements or requiring local storage
and processing of data or similar requirements that could increase the cost and complexity of delivering our services and
research activities.  These laws and regulations, as well as any associated claims, inquiries or investigations or any other
government actions may lead to unfavorable outcomes including increased compliance costs, delays or impediments in the
development of new products, negative publicity, increased operating costs, diversion of management time and attention,
and  remedies  that  harm  our  business,  including  fines  or  demands  or  orders  that  we  modify  or  cease  existing  business
practices.

The  EU,  United  Kingdom,  Switzerland  and  other  countries  have  also  adopted  data  protection  laws  and
regulations, which impose significant compliance obligations. In the EU, the collection and use of personal health data is
governed by the provisions of the General Data Protection Regulation, or GDPR. The GDPR became effective on May 25,
2018, repealing the Data Protection Directive and increasing our responsibility and liability in relation to the processing of
personal data of EU subjects. Fines for certain breaches of the GDPR are significant, up to the greater of 20 million Euros
or  4  %  of  total  global  annual  turnover.  In  addition  to  the  foregoing,  a  breach  of  the  GDPR  could  result  in  regulatory
investigations,  reputational  damage,  orders  to  cease/change  our  processing  of  our  data,  enforcement  notices,  and/or
assessment notices (for a compulsory audit). We may also face civil claims including representative actions and other class
action  type  litigation  (where  individuals  have  suffered  harm),  potentially  amounting  to  significant  compensation  or
damages liabilities, as well as associated costs, diversion of internal resources, and reputational harm.  Additionally, from 1
January 2021, we are subject to the GDPR and also the United Kingdom GDPR, which, together with the amended United
Kingdom  Data  Protection  Act  2018,  retains  the  GDPR  in  United  Kingdom  national  law  following  Brexit.  The  United
Kingdom GDPR mirrors the fines under the GDPR, e.g. fines up to the greater of €20 million (£17.5 million) or

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4% of global turnover. The relationship between the United Kingdom and the European Union in relation to certain aspects
of data protection law remains unclear, and it is unclear how United Kingdom data protection laws and regulations will
develop in the medium to longer term. These changes will lead to additional costs and increase our overall risk exposure.

The  GDPR,  together  with  the  national  legislation  of  the  EU  and  EEA  member  states  and  the  United  Kingdom
governing the processing of personal data, impose strict obligations and restrictions on the ability to collect, analyze and
transfer  personal  data,  including  health  data  from  clinical  trials  and  AE  reporting.  In  particular,  these  obligations  and
restrictions  concern  the  consent  of  the  individuals  to  whom  the  personal  data  relates,  the  information  provided  to  the
individuals, the transfer of personal data out of the EU , the EEA and the United Kingdom, security breach notifications,
security  and  confidentiality  of  the  personal  data,  and  imposition  of  substantial  potential  fines  for  breaches  of  the  data
protection obligations. Data protection authorities from the different EU and EEA member states may interpret the GDPR
and national laws differently and impose additional requirements, which add to the complexity of processing personal data
in the EU and the EEA. Guidance on implementation and compliance practices are often updated or otherwise revised.

With respect to the transfer of personal data out of the EU and the United Kingdom, the GDPR and the United
Kingdom provides that the transfer of personal data to countries that are not considered by the European Commission to
provide an adequate level of data protection, including the United States, is permitted only on the basis of complying with
specific legal steps, a number of which are subject to legal challenges. Most recently, on July 16, 2020, the Court of Justice
of  the  European  Union  (“CJEU”)  invalidated  the  EU-US  Privacy  Shield  Framework  (“Privacy  Shield”)  under  which
personal data could be transferred from the EEA to US entities who had self-certified under the Privacy Shield scheme.
These recent developments may require us to review and amend the legal mechanisms by which we make and/ or receive
personal  data  transfers  to/  in  the  U.S.    As  supervisory  authorities  issue  further  guidance  on  personal  data  export
mechanisms,  including  circumstances  where  the  standard  contractual  clauses  cannot  be  used,  and/or  start  taking
enforcement action, we could suffer additional costs, complaints and/or regulatory investigations or fines, and/or if we are
otherwise unable to transfer personal data between and among countries and regions in which we operate, it could affect
the  manner  in  which  we  provide  our  services,  the  geographical  location  or  segregation  of  our  relevant  systems  and
operations,  and  could  adversely  affect  our  financial  results.  In  addition,  the  United  Kingdom’s  withdrawal  from  the
European Union means that the United Kingdom will become a “third country” for the purposes of data transfers from the
European  Union  to  the  United  Kingdom  following  the  expiration  of  the  four  to  six-month  personal  data  transfer  grace
period (from 1 January 2021) set out in the EU and United Kingdom Trade and Cooperation Agreement, unless a relevant
adequacy  decision  is  adopted  in  favor  of  the  United  Kingdom  (which  would  allow  data  transfers  without  additional
measures). These changes may require us to find alternative solutions for the compliant transfer of personal data into the
United Kingdom.

Healthcare Reform

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

By way of example, the United States and state governments continue to propose and pass legislation designed to
reduce  the  cost  of  healthcare.  In  March  2010,  the  Patient  Protection  and  Affordable  Care  Act,  or  signed  the  ACA,  was
signed into law, which, among other things, included changes to the coverage and payment for products under government
health care programs. Among the provisions of the ACA of importance to IMCIVREE and our potential drug candidates
are:

● 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, although this fee does not apply to sales of certain products approved exclusively for
orphan indications;

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● 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;

● expansion  of  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
and extending rebate liability to prescriptions for individuals enrolled in Medicaid managed care plans;

● introduction  of  a  price  reporting  requirement  for  drugs  that  are  inhaled,  instilled,  implanted,  injected,  or

infused and not generally dispensed through retail community pharmacies;

● expansion of the list of entity types eligible for participation in the Public Health Service 340B drug pricing
program,  or  the  340B  program,  to  include  certain  free-standing  cancer  hospitals,  critical  access  hospitals,
rural  referral  centers,  and  sole  community  hospitals,  but  exempting  “orphan  drugs”  from  the  340B  ceiling
price requirements for these covered entities;

● established the Medicare Part D coverage gap discount program by requiring manufacturers to provide a 70%
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;

● a  new  Patient-Centered  Outcomes  Research  Institute  to  oversee,  identify  priorities  in,  and  conduct

comparative clinical effectiveness research, along with funding for such research; and

● established  the  Center  for  Medicare  and  Medicaid  Innovation  within  CMS  to  test  innovative  payment  and
service  delivery  models  to  lower  Medicare  and  Medicaid  spending,  potentially  including  prescription  drug
spending.

Since  its  enactment,  there  have  been  judicial,  executive  and  Congressional  challenges  to  certain  aspects  of  the
ACA.  For  example,  the  Tax  Cuts  and  Jobs  Acts  (the  “Tax  Act”)  was  enacted,  which,  among  other  things,  removed
penalties for not complying with the individual mandate to carry health insurance. On December 14, 2018, a U.S. District
Court Judge in the Northern District of Texas, ruled that the individual mandate is a critical and inseverable feature of the
ACA, and therefore, because it was repealed as part of the Tax Act, the remaining provisions of the ACA are invalid as
well. On December 18, 2019, the U.S. Court of Appeals for the 5th Circuit upheld the District Court’s decision that the
individual  mandate  was  unconstitutional  but  remanded  the  case  back  to  the  District  Court  to  determine  whether  the
remaining provisions of the Affordable Care Act are invalid as well. The U.S. Supreme Court is currently reviewing the
case, although it is unclear how the Supreme Court will rule. In addition, there may be other efforts to challenge, replace or
repeal the ACA that may affect the law or our business.

Other legislative and regulatory changes have been proposed and adopted in the United States since the ACA was
enacted. These changes included an aggregate reduction in Medicare payments to providers of 2 percent per fiscal year,
which  went  into  effect  on  April  1,  2013  and  will  remain  in  effect  through  2030,  with  the  exception  of  a  temporary
suspension  from  May  1,  2020  through  March  31,  2021,  unless  additional  Congressional  action  is  taken.  In  addition,  the
American  Taxpayer  Relief  Act  of  2012,  which  further  reduced  Medicare  payments  to  several  providers,  including
hospitals, imaging centers and cancer treatment centers, and increased the statute of limitations period for the government
to recover overpayments to providers from three to five years. Moreover, the federal government and individual states in
the  United  States  have  become  increasingly  active  in  developing  proposals,  passing  legislation  and  implementing
regulations  designed  to  control  drug  pricing,  including  price  or  patient  reimbursement  constraints,  discounts,  formulary
flexibility,  marketing  cost  disclosure  and  transparency  measures.  These  new  laws  and  the  regulations  and  policies
implementing them, as well as other healthcare-related measures that may be adopted in the future, could materially reduce
our ability to develop and commercialize IMCIVREE™ and our product candidates, if approved.

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Human Capital

Our employees are dedicated to our mission of changing the paradigm for the treatment of rare genetic diseases of
obesity.    As  of  January  31,  2021,  we  had  approximately  90  employees,  most  of  whom  were  located  at  our  corporate
headquarters in Boston with approximately 15 employees located in various regions in the United States as well as Europe,
as we start to build out a broader national and global presence. We also work with consultants and contractors to provide
both specific expertise and flexibility for our business needs.

We believe that our future success largely depends upon our continued ability to attract and retain highly skilled
employees. We emphasize a number of measures and objectives in managing our human capital assets, including, among
others,  employee  engagement,  development  and  training,  talent  acquisition  and  retention,  employee  wellness,  diversity,
inclusion, and compensation and pay equity. We provide our employees with competitive salaries, bonuses, opportunities
for  equity  ownership,  development  opportunities  that  enable  continued  learning  and  growth  and  a  robust  employment
package that promotes well-being across all aspects of their lives, including health care, retirement planning and paid time
off.  In  addition,  we  regularly  collect  employee  feedback  to  ensure  two-way  communication,  measure  employee
engagement  and  identify  opportunities  for  improvement.  During  2020,  in  response  to  the  COVID-19  pandemic  and  its
impact  on  the  workplace,  we  executed  what  we  believe  was  a  smooth  transition  to  a  remote  work  environment  while
ensuring that ample resources, support and flexibility were available to our employees.

We  believe  that  developing  a  diverse  and  inclusive  culture  is  critical  to  continuing  to  attract  and  retain  the  top
talent necessary to deliver on our growth strategy. As such, we are investing in a work environment where our employees
feel  inspired  and  included.  We  continue  to  focus  on  extending  our  diversity  and  inclusion  initiatives  across  our  entire
workforce.  In  addition,  we  work  to  ensure  our  employees  understand  and  embrace  our  commitment  to  our  patient
community  and  our  focus  on  changing  the  paradigm  for  treatment  of  rare  genetic  diseases  of  obesity.  We  value  our
employees’  courage  to  ask  bold  questions  and  their  commitment  to  learning  and  collaboration,  as  each  person  brings  a
unique  contribution  to  furthering  our  mission.  Grounded  in  these  guiding  principles,  we  believe  we  have  developed  a
collaborative environment where our colleagues feel respected, valued, and can contribute to their fullest potential.

Corporate Information

We  are  a  Delaware  corporation  organized  in  February  2013.    We  were  originally  incorporated  under  the  name
Rhythm Metabolic, Inc., and as of October 2015, under the name Rhythm Pharmaceuticals, Inc. Our principal executive
offices are located at 222 Berkeley Street, 12th Floor, Boston, MA 02116, and our telephone number is (857) 264-4280.
Our website is www.rhythmtx.com. Information that is contained on, or that can be accessed through, our website is not
incorporated by reference into this Annual Report on Form 10-K, and you should not consider information on our website
to be part of this Annual Report on Form 10-K.

Available Information

We make available free of charge on the investor relations portion of our website our Annual Reports on Form 10-
K,  Quarterly  Reports  on  Form  10-Q,  Current  Reports  on  Form  8-K,  Proxy  Statements  for  our  annual  meetings  of
stockholders,  and  amendments  to  those  reports,  as  soon  as  reasonably  practicable  after  we  file  such  material  with,  or
furnish it to, the Securities and Exchange Commission, or SEC. These filings are available for download free of charge on
the  investor  relations  portion  of  our  website  located  at  https://ir.rhythmtx.com.  The  SEC  also  maintains  a  website  that
contains reports, proxy statements and other information about issuers, like us, that file electronically with the SEC.  The
address of that website is https://www.sec.gov.

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Item 1A. Risk Factors

Our  operations  and  financial  results  are  subject  to  various  risks  and  uncertainties,  including  those  described
below,  which  could  adversely  affect  our  business,  financial  condition,  results  of  operations,  cash  flows,  and  the  trading
price of our common stock. Additional risks and uncertainties that we currently do not know about or that we currently
believe to be immaterial may also impair our business. You should carefully consider the risks described below and the
other  information  in  this  Annual  Report,  including  our  audited  consolidated  financial  statements  and  the  related  notes
thereto, and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Risks Related to Our Financial Position and Need for Capital

We  are  a  commercial-stage  biopharmaceutical  company  with  a  limited  operating  history  and  have  not  generated  any
revenue from product sales. We have incurred significant operating losses since our inception, anticipate that we will
incur continued losses for the foreseeable future and may never achieve profitability.

We  are  a  commercial-stage  biopharmaceutical  company  with  a  limited  operating  history  on  which  to  base  your
investment decision. Biopharmaceutical product development is a highly speculative undertaking and involves a substantial
degree of risk. We were incorporated in February 2013. Our operations to date have been limited primarily to acquiring
rights to intellectual property, business planning, raising capital, developing our technology, identifying potential product
candidates, undertaking preclinical studies and conducting research and development activities, including clinical trials, for
setmelanotide.  We  have  never  generated  any  revenue  from  product  sales.  We  have  obtained  FDA  approval  for
IMCIVREE™ (setmelanotide) for chronic weight management in adult and pediatric patients 6 years of age and older with
obesity due to proopiomelanocortin, or POMC, proprotein convertase subtilisin/kexin type 1, or PCSK1, or leptin receptor,
or  LEPR,  deficiency  confirmed  by  genetic  testing,  but  we  have  not  obtained  any  other  regulatory  approvals  for
setmelanotide. We first commercialized IMCIVREE in the U.S. in the first quarter of 2021and therefore do not have a long
history  operating  as  a  commercial  company.  We  will  need  to  begin  transitioning  from  a  company  with  a  research  and
development  focus  to  a  company  capable  of  supporting  commercial  activities  and  we  may  not  be  successful  in  such  a
transition. We have not yet demonstrated our ability to manufacture at commercial scale, or arrange for a third party to do
so  on  our  behalf,  or  conduct  sales,  marketing  and  distribution  activities  necessary  for  successful  product
commercialization. Consequently, any predictions made about our future success or viability may not be as accurate as they
could be if we had a longer operating history.

Since our inception, we have focused substantially all of our efforts and financial resources on the research and
development of setmelanotide, which is FDA approved as noted above and currently in clinical development for Bardet-
Biedl  syndrome,  or  BBS,  Alström  syndrome,  and  other  indications.  We  have  funded  our  operations  to  date  primarily
through the proceeds from the sales of common stock and preferred stock, asset sales, as well as capital contributions from
our former parent, Rhythm Holdings LLC, and have incurred losses in each year since our inception.

Our  net  losses  were  $134.0  million  and  $140.7  million  for  the  years  ended  December  31,  2020  and  2019,
respectively. As of December 31, 2020, we had an accumulated deficit of $459.3 million. Substantially all of our operating
losses have resulted from costs incurred in connection with our development programs and from commercial and general
and administrative costs associated with our operations. Our prior losses, combined with expected future losses, have had
and will continue to have an adverse effect on our stockholders’ deficit and working capital. We expect our research and
development  expenses  to  significantly  increase  in  connection  with  our  additional  clinical  trials  of  setmelanotide  and
development of any other product candidates we may choose to pursue. In addition, having obtained marketing approval
for  IMCIVREE,  we  will  incur  significant  sales,  marketing  and  outsourced  manufacturing  expenses.  We  will  incur
additional  costs  associated  with  operating  as  a  public  company,  including  as  a  result  of  no  longer  qualifying  as  an
“emerging growth company” as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act. As a result,
we  expect  to  continue  to  incur  significant  and  increasing  operating  losses  for  the  foreseeable  future.  Because  of  the
numerous risks and uncertainties associated with developing pharmaceutical products, we are unable to predict the extent
of any future losses or when we will become profitable, if at all. Even if we do become profitable, we may not be able to
sustain or increase our profitability on a quarterly or annual basis.

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Our ability to become profitable depends upon our ability to generate revenue. To date, we have not generated any
revenue  from  setmelanotide,  and  we  do  not  know  when,  or  if,  we  will  generate  any  revenue.  Our  ability  to  generate
revenue depends on a number of factors, including, but not limited to, our ability to:

● commercialize setmelanotide by building a commercial organization and/or entering into collaborations with

third parties; and

● ensure setmelanotide is available to patients;

● achieve market acceptance of setmelanotide in the medical community and with third-party payors.

● continue to initiate and successfully complete later-stage clinical trials that meet their clinical endpoints;

● continue to initiate and successfully complete all safety studies required to obtain U.S. and foreign marketing
approvals  for  setmelanotide  as  a  treatment  for  obesity  caused  by  genetic  deficiencies  affecting  the  MC4R
pathway; and

● successfully manufacture or contract with others to manufacture setmelanotide.

Absent  our  entering  into  collaboration  or  partnership  agreements,  we  expect  to  incur  significant  sales  and
marketing  costs  as  we  prepare  to  commercialize  setmelanotide.  Even  though  IMCIVREE  is  FDA  approved  for  chronic
weight  management  in  patients  6  years  of  age  and  older  with  obesity  due  to  POMC,  PCSK1  or  LEPR  deficiencies,  and
even if we successfully complete our pivotal and other clinical trials and setmelanotide is approved for commercial sale in
additional indications, setmelanotide may not be a commercially successful drug. We may not achieve profitability soon
after generating product sales, if ever. If we are unable to generate product revenue, we will not become profitable and will
be unable to continue operations without continued funding.

We will need to raise additional funding, which may not be available on acceptable terms, or at all. Failure to obtain
this necessary capital when needed may force us to delay, limit or terminate our product development efforts or other
operations.

We are currently in the early stages of commercializing IMCIVREE for chronic weight management in patients
with  obesity  due  to  POMC,  PCSK1  or  LEPR  deficiencies  in  the  U.S.  and  advancing  setmelanotide  through  clinical
development  for  additional  indications  in  the  United  States  and  for  potential  approvals  in  other  countries.  Developing
peptide therapeutic products is expensive and we expect our research and development expenses to increase substantially in
connection with our ongoing activities, particularly as we advance setmelanotide in additional clinical trials. We intend to
use  our  available  cash  resources  to  advance  the  clinical  development  of  setmelanotide,  for  disease-education  and
community-building  activities,  precommercialization  activities  for  setmelanotide  in  BBS,  patient  identification,  and
commercialization  activities  related  to  IMCIVREE.  Depending  on  the  status  of  additional  regulatory  approvals  and
commercialization  of  setmelanotide,  as  well  as  the  progress  we  make  in  any  sales  of  IMCIVREE,  we  may  still  require
significant additional capital to fund the continued development of setmelanotide and our operating needs thereafter. We
may also need to raise additional funds if we choose to pursue additional indications and/or geographies for setmelanotide
or otherwise expand more rapidly than we presently anticipate.

From August 2015 through August 2017, we raised aggregate net proceeds of $80.8 million through our issuance
of series A preferred stock. In connection with our initial public offering, or IPO, in October 2017 and our underwritten
follow-on offerings through February 2021, we raised aggregate net proceeds of approximately $611.4 million through the
issuance of our common stock after deducting underwriting discounts, commissions and offering related transaction costs.
Since inception, we have received a further $100.0 million from asset sales, specifically in connection with the sale of our
Rare Pediatric Disease Priority Review Voucher, or PRV, to Alexion Pharmaceuticals, Inc.  As of December 31, 2020, our
cash  and  cash  equivalents  and  short-term  investments  were  approximately  $172.8  million.  We  expect  our  cash  and  cash
equivalents  and  short-term  investments  as  of  December  31,  2020,  together  with  the  aggregate  net  proceeds  from  the
February 2021 public offering and proceeds from the PRV Transfer of approximately $260.1 million, will enable us to

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fund our operating expenses through at least the second half of 2023.  However, our operating plan may change as a result
of many factors currently unknown to us, and we may need to seek additional funds sooner than planned, through public or
private  equity  or  debt  financings,  government  or  other  third-party  funding,  marketing  and  distribution  arrangements  and
other  collaborations,  strategic  alliances  and  licensing  arrangements,  or  a  combination  of  these  approaches.  We  will  also
require  additional  capital  to  obtain  additional  regulatory  approvals  for,  and  to  continue  to  commercialize,  setmelanotide.
Raising funds in the current economic environment, particularly in light of ongoing uncertainty related to the COVID-19
pandemic,  may  present  additional  challenges.  Even  if  we  believe  we  have  sufficient  funds  for  our  current  or  future
operating  plans,  we  may  seek  additional  capital  if  market  conditions  are  favorable  or  if  we  have  specific  strategic
considerations.

Any  additional  fundraising  efforts  may  divert  our  management  from  their  day-to-day  activities,  which  may
adversely  affect  our  ability  to  develop  and  commercialize  setmelanotide.  In  addition,  we  cannot  guarantee  that  future
financing will be available in sufficient amounts or on terms acceptable to us, if at all. Moreover, the terms of any financing
may adversely affect the holdings or the rights of our stockholders and the issuance of additional securities, whether equity
or  debt,  by  us,  or  the  possibility  of  such  issuance,  may  cause  the  market  price  of  our  shares  to  decline.  The  sale  of
additional equity or convertible securities would dilute all of our stockholders. The incurrence of indebtedness would result
in increased fixed payment obligations and we may be required to agree to certain restrictive covenants, such as limitations
on our ability to incur additional debt, limitations on our ability to acquire, sell or license intellectual property rights, and
other operating restrictions that could adversely impact our ability to conduct our business. We could also be required to
seek funds through arrangements with collaborative partners or other third parties at an earlier stage than otherwise would
be  desirable  and  we  may  be  required  to  relinquish  rights  to  setmelanotide  or  technologies  or  otherwise  agree  to  terms
unfavorable to us, any of which may have a material adverse effect on our business, operating results and prospects.

If  we  are  unable  to  obtain  funding  on  a  timely  basis,  we  may  be  required  to  significantly  curtail,  delay  or
discontinue one or more of our research or development programs or the commercialization of setmelanotide or be unable
to expand our operations or otherwise capitalize on our business opportunities, as desired, which could materially adversely
affect our business, financial condition and results of operations.

Risks Related to the Development of Setmelanotide

The European Medicines Agency, or EMA, may disagree with our interpretation of clinical results obtained from our
Phase  3  clinical  trials  for  obesity  due  to  POMC,  PCSK1  or  LEPR  deficiencies,  our  results  do  not  guarantee  that  the
Marketing  Authorization  Application,  or  MAA,  will  support  regulatory  approval,  and,  even  if  our  Phase  3  data  are
deemed to be positive by the EMA, the EMA may disagree with other aspects of the MAA submission and, as a result,
the European Commission may decline to approve setmelanotide for the proposed indications.

Even though the FDA has approved IMCIVREE for chronic weight management in patients with obesity due to
POMC,  PCSK1  or  LEPR  deficiencies,  the  EMA  could  determine  that  the  data  from  our  Phase  3  clinical  trials  were
negative or inconclusive, not sufficiently meaningful from a clinical perspective or could reach different conclusions than
we and the FDA have on the same data. Negative or inconclusive results of a clinical trial or a difference of opinion could
cause the European Commission to decline to approve our application or cause the EMA to require us to repeat the trial or
conduct additional clinical trials prior to obtaining approval for commercialization, and there is no guarantee that additional
trials would achieve positive results to the satisfaction of the EMA or that the EMA will agree with our interpretation of the
results. Any such determination by the EMA would delay the timing of our commercialization plan for setmelanotide in
Europe  or  prevent  its  further  development,  and  adversely  affect  our  business  operations.  Additionally,  the  EMA  may
provide commentary at any time during the review process which could require us to submit additional information and
delay the review timeline, adversely affect the review process, or even prevent the approval of setmelanotide, any of which
would  adversely  affect  our  business.  We  may  not  be  able  to  appropriately  remedy  issues  that  the  EMA  may  raise  in  its
review of our MAA submission, and we may not have sufficient time or financial resources to conduct future activities to
remediate issues raised by the EMA.

There is no guarantee that the data obtained from our Phase 3 clinical trials for obesity due to POMC, PCSK1 or
LEPR  deficiencies  will  be  supportive  of,  or  guarantee,  a  successful  MAA  submission,  or  result  in  our  obtaining  the
European Commission’s approval of setmelanotide in a timely fashion and for a commercially viable indication, or at all.

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Moreover, even if we obtain approval of setmelanotide in Europe, any such approval might significantly limit the
approved indications for use, including by limiting the approved label for use by more limited patient populations than we
propose, require that precautions, contraindications or warnings be included on the product labeling, including black box
warnings, require expensive and time-consuming post-approval clinical studies, risk evaluation and mitigation strategies, or
REMS, or surveillance as conditions of approval, or, through the product label, the approval may limit the claims that we
may make, which may impede the successful commercialization of setmelanotide.

Positive results from early clinical trials of setmelanotide may not be predictive of the results of later clinical trials of
setmelanotide. If we cannot generate positive results in our later clinical trials of setmelanotide, we may be unable to
successfully develop, obtain regulatory approval for, and commercialize additional indications for setmelanotide.

Positive results from any of our Phase 1, Phase 2, or Phase 3 clinical trials of setmelanotide, or initial results from
other clinical trials of setmelanotide, may not be predictive of the results of later clinical trials. The duration of effect of
setmelanotide  tested  in  our  Phase  1  and  Phase  2  clinical  trials  was  often  for  shorter  periods  than  in  our  pivotal  Phase  3
clinical trials. The duration of effect of setmelanotide has only been studied in long-term durations for a small number of
patients in our Phase 2 and Phase 3 clinical trials and safety or efficacy issues may arise when more patients are studied in
longer trials and on commercial drug. It is possible that the effects seen in short-term clinical trials will not be replicated in
long-term or larger clinical trials. In addition, not all of our trials demonstrated statistically significant weight loss and there
can be no guarantee that future trials will do so.

Positive results for one indication are not necessarily predictive of positive results for other indications. We have
demonstrated statistically significant and clinically meaningful reductions in weight and hunger in Phase 3 clinical trials in
obesity  due  to  POMC,  PCSK1  or  LEPR  deficiencies  and  BBS,  and  believe  we  have  demonstrated  proof  of  concept  in
Phase 2 clinical trials in deficiencies due to a variant in one of the two alleles in the POMC, PCSK1, or LEPR genes (HET
obesity), as well as the SRC1 and SH2B1 genes, all genetic disorders of extreme and unrelenting appetite and obesity. We
hypothesize that patients with other upstream genetic defects in the MC4R pathway may also respond with reductions in
weight and hunger after treatment with setmelanotide. However patients with other upstream genetic defects may not have
a similar response to setmelanotide, and until we obtain more clinical data in other genetic defects, we will not be sure that
we can achieve proof of concept in such indications.  

We  are  actively  working  to  advance  additional  genetic  deficiencies  related  to  the  MC4R  pathway  through  our
clinical development program. We anticipate initiating a Phase 3, registration-enabling study to evaluate setmelanotide in
patients with MC4R pathway deficiencies due to a variant in one of the two alleles in the POMC, PCSK1, or LEPR genes
(HET obesity), as well as the SRC1 and SH2B1 genes. In addition, we plan to initiate an expanded Phase 2 Basket Study to
evaluate setmelanotide for the treatment of obesity due to a deficiency in one of 31 additional genes associated with the
MC4R  pathway.    However,  success  in  a  basket  trial,  or  any  trial  in  one  indication,  may  not  predict  success  in  another
indication.  In  contrast,  in  the  event  of  an  adverse  safety  issue,  clinical  hold,  or  other  adverse  finding  in  one  or  more
indications  being  tested,  such  event  could  adversely  affect  our  trials  in  the  other  indications  and  may  delay  or  prevent
completion of the clinical trials.

Many  companies  in  the  pharmaceutical  and  biotechnology  industries  have  suffered  significant  setbacks  in  later
stage clinical trials after achieving positive results in early stage development, and we cannot be certain that we will not
face similar setbacks. These setbacks have been caused by, among other things, pre-clinical findings made while clinical
trials were underway.

Additionally,  setbacks  may  be  caused  by  new  safety  or  efficacy  observations  made  in  clinical  trials,  including
previously  unreported  adverse  events,  or  AEs.  Moreover,  preclinical  and  clinical  data  are  often  susceptible  to  varying
interpretations  and  analyses,  and  many  companies  that  believed  their  product  candidates  performed  satisfactorily  in
preclinical  studies  and  clinical  trials  nonetheless  failed  to  obtain  FDA  approval  or  a  marketing  authorization  from  the
European Commission. If we fail to continue to obtain positive results in our Phase 3 clinical trials of setmelanotide, the
development  timeline  and  regulatory  approval  and  commercialization  prospects  for  setmelanotide  and,  correspondingly,
our business and financial prospects, would be materially adversely affected.

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Interim,  “topline”  and  preliminary  data  from  our  clinical  trials  that  we  announce  or  publish  from  time  to  time  may
change as more patient data become available and are subject to audit and verification procedures that could result in
material changes in the final data.

From time to time, we may publicly disclose preliminary or topline data from our preclinical studies and clinical
trials, which is based on a preliminary analysis of then-available data, and the results and related findings and conclusions
are  subject  to  change  following  a  more  comprehensive  review  of  the  data  related  to  the  particular  study  or  trial.  For
example, the results of our Phase 3 clinical trials for BBS and Alström syndrome that we have publicly disclosed consist of
topline data and further analyses of data obtained from these trials. We make assumptions, estimations, calculations and
conclusions as part of our analyses of data, and we may not have received or had the opportunity to fully and carefully
evaluate all data. As a result, the topline or preliminary results that we report may differ from future results of the same
studies, or different conclusions or considerations may qualify such results, once additional data have been received and
fully evaluated. Topline data also remain subject to audit and verification procedures that may result in the final data being
materially  different  from  the  preliminary  data  we  previously  published  or  reported.  As  a  result,  topline  data  should  be
viewed with caution until the final data are available.

From time to time, we may also disclose interim data from our preclinical studies and clinical trials. For example,
we  recently  announced  interim  proof-of-concept  data  from  our  ongoing  exploratory  Phase  2  Basket  Study  evaluating
setmelanotide in patients with MC4R pathway deficiencies due to a variant in one of the two alleles in the POMC, PCSK1,
or LEPR genes, as well as the SRC1 and SH2B1 genes.  Interim data from clinical trials that we may complete are subject
to  the  risk  that  one  or  more  of  the  clinical  outcomes  may  materially  change  as  patient  enrollment  continues  and  more
patient data become available. Adverse differences between preliminary or interim data and final data could significantly
harm our business prospects. Further, disclosure of interim data by us or by our competitors could result in volatility in the
price of our common stock.

Further,  others,  including  regulatory  agencies,  may  not  accept  or  agree  with  our  assumptions,  estimates,
calculations, conclusions or analyses or may interpret or weigh the importance of data differently, which could impact the
value of the particular program, the approvability or commercialization of the particular product candidate or product and
our company in general. In addition, the information we choose to publicly disclose regarding a particular study or clinical
trial  is  based  on  what  is  typically  extensive  information,  and  you  or  others  may  not  agree  with  what  we  determine  is
material or otherwise appropriate information to include in our disclosure.

If  the  interim,  topline,  or  preliminary  data  that  we  report  differ  from  actual  results,  or  if  others,  including
regulatory  authorities,  disagree  with  the  conclusions  reached,  our  ability  to  obtain  approval  for,  and  commercialize,  our
product candidates may be harmed, which could harm our business, operating results, prospects or financial condition.

The number of patients suffering from each of the MC4R pathway deficiencies we are targeting is small and has not
been established with precision. If the actual number of patients is smaller than we estimate, our revenue and ability to
achieve profitability may be materially adversely affected.  

Due  to  the  rarity  of  our  target  indications,  there  is  no  comprehensive  patient  registry  or  other  method  of
establishing with precision the actual number of patients with MC4R pathway deficiencies. As a result, we have had to rely
on other available sources to derive clinical prevalence estimates for our target indications. In addition, we have internal
genetic sequencing results from approximately 37,500 patients, as of September 30, 2020, with severe obesity that provide
another  approach  to  estimating  prevalence.  Since  the  published  epidemiology  studies  for  these  genetic  deficiencies  are
based on relatively small population samples, and are not amenable to robust statistical analyses, it is possible that these
projections  may  significantly  exceed  the  addressable  population,  particularly  given  the  need  to  genotype  patients  to
definitively confirm a diagnosis.

Based on multiple epidemiological methods, we have estimated the potential addressable patient populations with

these MC4R pathway deficiencies based on the following sources and assumptions:

● POMC Deficiency Obesity. POMC Deficiency Obesity is defined by the presence of biallelic variants in the
POMC or PCSK1 genes that are interpreted as pathogenic, likely pathogenic, or of uncertain significance

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(VOUS). Our addressable patient population estimate for POMC deficiency obesity is approximately 100 to
500 patients in the United States, with a comparable addressable patient population in Europe. Our estimates
are based on:

● approximately  50  patients  with  POMC  deficiency  obesity  noted  in  a  series  of  published  case  reports,
each mostly reporting a single or small number of patients. However, we believe our addressable patient
population  for  this  deficiency  may  be  approximately  100  to  500  patients  in  the  United  States,  and  a
comparable  addressable  patient  population  in  Europe,  as  most  of  the  reported  cases  are  from  a  small
number of academic research centers, and because genetic testing for POMC deficiency obesity is often
unavailable and currently is rarely performed;

● our belief, based on discussions with experts in rare diseases, that the number of diagnosed cases could

increase several-fold with increased awareness of this deficiency and the availability of new treatments;

● U.S. Census Bureau figures for adults and children, and Centers for Disease Control and Prevention, or
CDC,  prevalence  numbers  for  severe  adult  obese  patients  (body  mass  index,  or  BMI,  greater  than  40
kg/m2) and for severe early onset obese children (99th percentile at ages two to 17 years old); and

● our internal sequencing yield for POMC deficiency obesity patients (including both POMC and PCSK1
gene  disorders),  defined  as  patients  having  biallelic  variants  in  the  POMC  or  PCSK1  genes  that  are
interpreted  as  pathogenic,  likely  pathogenic,  or  of  uncertain  significance  (VOUS),  of  approximately
0.05%.

● LEPR Deficiency Obesity.  LEPR  Deficiency  Obesity  is  defined  by  the  presence  of  biallelic  variants  in  the
LEPR gene that are interpreted as pathogenic, likely pathogenic, or of uncertain significance (VOUS). Our
addressable patient population estimate for LEPR deficiency obesity is approximately 500 to 2,000 patients
in the United States, with a comparable addressable patient population in Europe. Our estimates are based on:

● epidemiology  studies  on  LEPR  deficiency  obesity  in  small  cohorts  of  patients  comprised  of  children

with severe obesity and adults with severe obesity who have a history of early onset obesity;

● U.S. Census Bureau figures for adults and children and CDC prevalence numbers for severe adult obese
patients (BMI, greater than 40 kg/m2) and for severe early onset obese children (99th percentile at ages
two to 17 years old);

● with wider availability of genetic testing expected for LEPR deficiency obesity and increased awareness
of  new  treatments,  our  belief  that  up  to  40%  of  patients  with  these  disorders  may  eventually  be
diagnosed; and

● our internal sequencing yield for LEPR deficiency obesity patients, defined as patients having biallelic
variants  in  the  LEPR  gene  that  are  interpreted  as  pathogenic,  likely  pathogenic,  or  of  uncertain
significance (VOUS), of approximately 0.09%.

● Bardet-Biedl  Syndrome.  Our  addressable  patient  population  estimate  for  BBS  is  approximately  1,500  to

2,500 patients in the United States based on:

● published  prevalence  estimates  of  one  in  100,000  in  North  America,  which  projects  to  approximately
3,250 people in the United States. We believe the majority of these patients are addressable patients; and

● our belief that with wider availability of genetic testing expected for BBS and increased awareness of

new treatments, the number of patients diagnosed with this disorder will increase.

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● Alström Syndrome. Our addressable patient population estimate for Alström syndrome is approximately 500

patients worldwide. This estimate is based on:

● published prevalence estimates of one in 1,000,000 in North America, which projects to approximately
325 people in the United States. We believe the majority of these patients are addressable patients; and

● our belief that with wider availability of genetic testing expected for Alström syndrome and increased

awareness of new treatments, the number of patients diagnosed with this disorder will increase.

● POMC, PCSK1, or LEPR Heterozygous Deficiency Obesities; SRC1 and SH2B1 Deficiency Obesities.  Our
potential setmelanotide-responsive patient population estimate for POMC, PCSK1, or  LEPR  heterozygous,
SRC1  and  SH2B1  deficiency  obesity  patients  with  at  least  one  variant  interpreted  as  pathogenic,  likely
pathogenic,  or  of  uncertain  significance  (VOUS)  is  100,000  to  200,000 patients  in  the  United  States.  Our
estimates are based on:

● U.S.  Census  Bureau  population  data  and  CDC  prevalence  numbers  for  early  onset  obesity  (120%  the

95th percentile between the ages of 2-5 years);

● our internal sequencing yield of patients with POMC, PCSK1, or LEPR heterozygous, SRC1 or SH2B1
variants  interpreted  as  pathogenic,  likely  pathogenic,  or  of  uncertain  significance  (VOUS)  of
approximately 10-15%; and

● a clinical response rate of 40% for patients carrying pathogenic or likely pathogenic variants, and 20%

for patients carrying a variant of uncertain significance (VOUS).

The clinical response rate used in this calculation is based on the clinical data currently available to us from our
trials and may change as more data become available.

● MC4R  Deficiency  Obesity.  Our  addressable  patient  population  estimate  for  MC4R-rescuable  deficiency

obesity is approximately 10,000 patients in the United States. This estimate is based on:

● U.S.  Census  Bureau  population  data  and  CDC  prevalence  numbers  for  early  onset  obesity  (120%  the

95th percentile between the ages of 2-5 years);

● a  comprehensive  ongoing  biochemical  screening  study  indicating  there  may  be  a  defined  subset  of

individuals who carry MC4R variants that may be rescued by an MC4R agonist; and

● our  internal  sequencing  yield  for  MC4R  deficiency  obesity  patients  of  approximately  2.0%  prior  to

application of functional filters.

● Smith-Magenis  Syndrome.  Our  addressable  patient  population  estimate  for  Smith-Magenis  syndrome  is

approximately 2,400 patients in the United States. This estimate is based on:

● published prevalence estimates of one in 25,000 in the United States, which projects to approximately

13,000 people in the United States;

● published prevalence estimates that approximately 10% of patients with Smith-Magenis syndrome have
RAI1 variants that may affect the MC4R pathway and 90% of patients with Smith-Magenis syndrome
have 17p11.2 chromosomal deletions which also may affect the MC4R pathway, of which approximately
67% and 13%, respectively, live with obesity; and

● U.S. Census Bureau figures for total population of adults and children.

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We believe that the patient populations in the EU are at least as large as those in the United States. However, we

do not have comparable epidemiological data from the EU and these estimates are therefore based solely on applying
relative population percentages to the Company-derived estimates described above.

Defining the exact genetic variants that result in MC4R pathway disorders is complex, so if any approval that we
obtain is based on a narrower definition of these patient populations than we had anticipated, then the potential market for
setmelanotide for these indications will be smaller than we originally believed. In either case, a smaller patient population
in our target indications would have a materially adverse effect on our ability to achieve commercialization and generate
revenues.

If  we  experience  delays  or  difficulties  in  the  enrollment  and/or  retention  of  patients  in  clinical  trials,  our  regulatory
submissions or receipt of additional marketing approvals could be delayed or prevented.

We may not be able to initiate or continue our planned clinical trials on a timely basis or at all for our product
candidates if we are unable to recruit and enroll a sufficient number of eligible patients to participate in these trials through
completion of such trials as required by the FDA or other comparable foreign regulatory authorities. Patient enrollment is a
significant factor in the timing of clinical trials. Our ability to enroll eligible patients may be limited or may result in slower
enrollment than we anticipate.

Our  clinical  trials  will  compete  with  other  clinical  trials  that  are  in  the  same  therapeutic  areas  as  our  product
candidates, and this competition reduces the number and types of patients available to us, as some patients who might have
opted  to  enroll  in  our  trials  may  instead  opt  to  enroll  in  a  trial  being  conducted  by  one  of  our  competitors.  Because  the
number of qualified clinical investigators and clinical trial sites is limited, we expect to conduct some of our clinical trials
at the same clinical trial sites that some of our competitors use, which will reduce the number of patients who are available
for our clinical trials at such clinical trial sites. In addition, there are limited patient pools from which to draw for clinical
studies. In addition to the rarity of genetic diseases of obesity, the eligibility criteria of our clinical studies will further limit
the pool of available study participants as we will require that patients have specific characteristics that we can measure or
to assure their disease is either severe enough or not too advanced to include them in a study. Patient enrollment for our
current or any future clinical trials may be affected by other factors, including:

● size and nature of the patient population;

● severity of the disease under investigation;

● availability and efficacy of approved drugs for the disease under investigation;

● patient eligibility criteria for the trial in question as defined in the protocol;

● perceived risks and benefits of the product candidate under study;

● clinicians’ and patients’ perceptions as to the potential advantages of the product candidate being studied in
relation  to  other  available  therapies,  including  any  new  products  that  may  be  approved  or  future  product
candidates being investigated for the indications we are investigating;

● clinicians’ willingness to screen their patients for genetic markers to indicate which patients may be eligible

for enrollment in our clinical trials;

● delays  in  or  temporary  suspension  of  the  enrollment  of  patients  in  our  planned  clinical  trial  due  to  the

COVID-19 pandemic;

● ability to obtain and maintain patient consents;

● patient referral practices of physicians;

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

● proximity and availability of clinical trial sites for prospective patients; and

● the  risk  that  patients  enrolled  in  clinical  trials  will  drop  out  of  the  trials  before  completion,  including  as  a
result  of  contracting  COVID-19  or  other  health  conditions  or  being  forced  to  quarantine,  or,  because  they
may be late-stage cancer patients, will not survive the full terms of the clinical trials.

In addition, the pediatric population is an important patient population for setmelanotide, and our addressable patient
population  estimates  include  pediatric  populations.  However,  it  may  be  more  challenging  to  conduct  studies  in  younger
subjects, and to locate and enroll pediatric patients. These factors may make it difficult for us to enroll enough patients to
complete our clinical trials in a timely and cost-effective manner. Our 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  also  result  in  increased  development  costs  for  setmelanotide  and  any  future
product  candidates  and  jeopardize  our  ability  to  obtain  additional  marketing  approvals  for  the  sale  of  setmelanotide.
Furthermore,  even  if  we  are  able  to  enroll  a  sufficient  number  of  patients  for  our  clinical  trials,  we  may  have  difficulty
maintaining participation in our clinical trials through the treatment and any follow-up periods.

Failures or delays in the commencement or completion of our planned clinical trials of setmelanotide could result in
increased costs to us and could delay, prevent or limit our ability to generate revenue and continue our business.

Successful completion of our ongoing and planned clinical trials is a prerequisite to submitting an NDA or NDA
supplement to the FDA, an MAA to the EMA, and other applications for marketing authorization to equivalent competent
authorities in foreign jurisdictions, and consequently, successful completion of such trials will be required for regulatory
approvals and the commercial marketing of setmelanotide.

We  do  not  know  whether  our  planned  clinical  trials  will  begin  or  whether  any  of  our  clinical  trials  will  be
completed  on  schedule,  if  at  all,  as  the  commencement  and  successful  completion  of  clinical  trials  can  be  delayed  or
prevented for a number of reasons, including but not limited to:

● inability to generate sufficient preclinical or other in vivo or in vitro data to support the initiation of clinical

studies;

● delays in the completion of preclinical laboratory tests, animal studies and formulation studies in accordance

with FDA’s good laboratory practice requirements and other applicable regulations;

● the FDA or other equivalent competent authorities in foreign jurisdictions may deny permission to proceed
with our ongoing or planned trials or any other clinical trials we may initiate, or may place a clinical trial on
hold or be suspended;

● delays  in  filing  or  receiving  authorization  to  proceed  under  an  additional  investigational  new  drug

application, or IND, if required;

● delays in reaching a consensus with the FDA and other regulatory agencies on study design and obtaining

regulatory authorization to commence clinical trials;

● delays  in  reaching  or  failing  to  reach  agreement  on  acceptable  terms  with  prospective  contract  research
organizations, or CROs, and clinical trial sites, the terms of which can be subject to extensive negotiation and
may vary significantly among different CROs and trial sites;

● difficulties in obtaining Institutional Review Board, or IRB, and/or ethics committee approval to conduct a

clinical trial at a prospective site or sites;

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● since many already diagnosed patients are at academic sites, delays in conducting clinical trials at academic
sites due to the particular challenges and delays typically associated with those sites, as well as the lack of
alternatives to these sites which have already-diagnosed patients;

● inadequate  quantity  or  quality  of  setmelanotide  or  other  materials  necessary  to  conduct  clinical  trials,

including delays in the manufacturing of sufficient supply of finished drug product;

● challenges in identifying, recruiting and training suitable clinical investigators;

● challenges in recruiting and enrolling suitable patients to participate in clinical trials;

● severe or unexpected drug-related side effects experienced by patients in a clinical trial, including side effects

previously identified in our completed clinical trials;

● difficulty collaborating with patient groups and investigators;

● failure  by  our  CROs,  other  third  parties  or  us  to  perform  in  accordance  with  the  FDA’s  or  any  other
regulatory  authority’s  good  clinical  practice  requirements,  or  GCPs,  or  applicable  regulatory  guidelines  in
other countries;

● occurrence of adverse events associated with setmelanotide that are viewed to outweigh its potential benefits,

or occurrence of adverse events in trial of the same or similar class of agents conducted by other companies;

● changes to the clinical trial protocols;

● clinical sites deviating from trial protocol or dropping out of a trial;

● changes in regulatory requirements and guidance that require amending or submitting new clinical protocols;

● changes in the standard of care on which a clinical development plan was based, which may require new or

additional trials;

● selection of clinical endpoints that require prolonged periods of observation or analyses of resulting data;

● the cost of clinical trials of our product candidates being greater than we anticipate;

● clinical trials of our product candidates producing negative or inconclusive results, which may result in our
deciding,  or  regulators  requiring  us,  to  conduct  additional  clinical  trials  or  abandon  development  of  such
product candidates;  and

● development of antibodies to the drug or adjuvants may result in loss of efficacy or safety events.  

In addition, disruptions caused by the COVID-19 pandemic may increase the likelihood that we encounter such
difficulties  or  delays  in  initiating,  enrolling,  conducting  or  completing  our  planned  and  ongoing  clinical  trials.    Clinical
trials may also be delayed or terminated as a result of ambiguous or negative interim results. In addition, a clinical trial
may be suspended or terminated by us, the FDA or other equivalent competent authorities in foreign jurisdictions, the IRBs
or ethics committees at the sites where the IRBs or the ethics committees are overseeing a clinical trial, a data and safety
monitoring  board,  or  DSMB,  or  Safety  Monitoring  Committee,  or  SMC,  overseeing  the  clinical  trial  at  issue  or  other
equivalent competent authorities due to a number of factors, including, among others:

● failure to conduct the clinical trial in accordance with regulatory requirements or our clinical trial protocols;

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● inspection of the clinical trial operations or trial sites by the FDA or other equivalent competent authorities
that reveals deficiencies or violations that require us to undertake corrective action, including the imposition
of a clinical hold;

● unforeseen safety issues, adverse side effects or lack of effectiveness;

● changes in government regulations or administrative actions;

● problems with clinical trial supply materials; and

● lack of adequate funding to continue the clinical trial.

Delays in the completion of any preclinical studies or clinical trials of setmelanotide will increase our costs, slow

down our product candidate development and approval process and delay or potentially jeopardize our ability to commence
product sales and generate product revenue. In addition, many of the factors that cause, or lead to, a delay in the
commencement or completion of clinical trials may also ultimately lead to the denial of a regulatory approval for
setmelanotide. Any delays to our preclinical studies or clinical trials that occur as a result could shorten any period during
which we may have the exclusive right to commercialize setmelanotide and our competitors may be able to bring products
to market before we do, and the commercial viability of our product candidates could be significantly reduced. Any of
these occurrences may harm our business, financial condition and prospects significantly.

The  COVID-19  pandemic  has  and  may  continue  to  adversely  impact  our  business,  including  our  preclinical  studies,
clinical trials and our commercialization prospects.

The  COVID-19  pandemic  has  spread  to  multiple  countries,  including  the  United  States,  Canada  and  Europe,
where  we  have  planned  or  ongoing  preclinical  studies  and  clinical  trials.  Governments  from  many  countries  have
established stay at home measures including, among other things, the prohibition of public gatherings and restrictions on
domestic and international travel. The pandemic and government measures taken in response have also had a significant
impact, both direct and indirect, on businesses and commerce, as worker shortages have occurred, supply chains have been
disrupted,  facilities  and  production  have  been  suspended,  and  demand  for  certain  goods  and  services,  such  as  medical
services and supplies, has spiked, while demand for other goods and services, such as travel, has fallen. In response to the
spread of COVID-19, we have limited access to our principal executive office with most employees continuing their work
outside of our office and restricted travel. In addition, we experienced interruption of key clinical trial activities, such as
patient attendance and clinical trial site monitoring, in our Phase 3 clinical trial evaluating setmelanotide for the treatment
of  insatiable  hunger  and  severe  obesity  in  individuals  with  BBS  or  Alström  syndrome.  If  the  COVID-19  pandemic
continues  for  a  significant  length  of  time,  we  may  experience  additional  disruptions  that  could  severely  impact  our
business, preclinical studies, clinical trials and our commercialization prospects, including:

● delays in receiving approval from local regulatory authorities to initiate or conduct our planned clinical trials;

● further delays or difficulties in enrolling patients in our clinical trials;

● delays or difficulties in clinical site initiation, including difficulties in recruiting clinical site investigators and

clinical site staff;

● delays  in  clinical  sites  receiving  the  supplies  and  materials  needed  to  conduct  our  clinical  trials,  including

interruption in global shipping that may affect the transport of clinical trial materials;

● changes  in  local  regulations  as  part  of  a  response  to  the  COVID-19  pandemic  which  may  require  us  to
change  the  ways  in  which  our  clinical  trials  are  conducted,  which  may  result  in  unexpected  costs,  or  to
discontinue such clinical trials altogether;

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● diversion of healthcare resources away from the conduct of clinical trials, including the diversion of hospitals

serving as our clinical trial sites and hospital staff supporting the conduct of our clinical trials;

● further interruption of key clinical trial activities, such as clinical trial site monitoring, due to limitations on
travel  imposed  or  recommended  by  federal  or  state  governments,  employers  and  others,  or  interruption  of
clinical trial subject visits and study procedures, the occurrence of which could affect the integrity of clinical
trial data;

● risk that participants enrolled in our clinical trials will contract COVID-19 while the clinical trial is ongoing,
which could impact the results of the clinical trial, including by increasing the number of observed adverse
events;

● interruptions  or  delays  in  preclinical  studies  due  to  restricted  or  limited  operations  at  our  research  and

development laboratory facility;

● delays  in  necessary  interactions  with  local  regulators,  ethics  committees  and  other  important  agencies  and

contractors due to limitations in employee resources or forced furlough of government employees;

● limitations  in  employee  resources  that  would  otherwise  be  focused  on  the  conduct  of  our  clinical  trials,
including because of sickness of employees or their families or the desire of employees to avoid contact with
large groups of people;

● refusal of the FDA to accept data from clinical trials in affected geographies;

● impacts from prolonged remote work arrangements, such as increased cybersecurity risks and strains on our

business continuity plans; and

● delays  in  the  receipt  of  marketing  authorizations  for  our  product  candidates,  which  could  materially  affect

our commercialization plans.

The COVID-19 pandemic continues to rapidly evolve. The extent to which the pandemic impacts our business,
preclinical  studies,  clinical  trials  and  our  commercialization  prospects  will  depend  on  future  developments,  which  are
highly  uncertain  and  cannot  be  predicted  with  confidence,  such  as  the  ultimate  geographic  spread  of  the  disease,  the
duration  of  the  pandemic,  travel  restrictions  and  social  distancing  in  the  United  States  and  other  countries,  business
closures  or  business  disruptions,  the  effectiveness  of  vaccines  and  vaccine  distribution  efforts,  and  the  effectiveness  of
other actions taken in the United States and other countries to contain and treat the disease. While the potential economic
impact  brought  by  and  the  duration  of  the  COVID-19  pandemic  may  be  difficult  to  assess  or  predict,  the  widespread
pandemic  has  resulted  in,  and  may  continue  to  result  in,  significant  disruption  of  global  financial  markets,  reducing  our
ability to access capital, which could in the future negatively affect our liquidity. In addition, the recession or economic
downturn resulting from the spread of COVID-19 could materially affect our business.

Setmelanotide may cause undesirable side effects that could delay or prevent additional regulatory approvals, limit the
commercial profile of approved labeling, or result in significant negative consequences following marketing approval.

First generation MC4R agonists were predominantly small molecules that failed in clinical trials due to significant
safety  issues,  particularly  increases  in  blood  pressure,  and  had  limited  efficacy.  Undesirable  side  effects  caused  by
setmelanotide could cause us or regulatory authorities to interrupt, delay or halt clinical trials and could result in a more
restrictive  labeling  or  the  delay  or  denial  of  additional  regulatory  approvals  by  the  FDA  or  other  equivalent  competent
authorities  in  foreign  jurisdictions.  Treatment-related  side  effects  could  also  affect  patient  recruitment  or  the  ability  of
enrolled patients to complete the trial or result in potential product liability claims. Any of these occurrences may prevent
us  from  achieving  or  maintaining  market  acceptance  of  the  affected  product  candidate  and  may  adversely  affect  our
business, financial condition and prospects significantly.

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Setmelanotide is an MC4R agonist. Potential side effects of MC4R agonism, which have been noted either with

setmelanotide or with other MC4R agonists in clinical trials and preclinical studies, may include:

● adverse effects on cardiovascular parameters, such as increases in heart rate and blood pressure;

● erections  in  males  and  similar  effects  in  women,  such  as  sexual  arousal,  clitoral  swelling  and

hypersensitivity;

● nausea and vomiting;

● reduced appetite;

● headache;

● effects on mood, depression, anxiety and other psychiatric manifestations; and

● other effects, for which most investigators reported as unrelated to setmelanotide and for which no increased

incidence or pattern is currently evident.

In  addition,  injection  site  reactions  have  been  seen  in  subcutaneous,  or  SC,  injections  with  setmelanotide.  In
addition,  setmelanotide  has  likely  off-target  effects  on  the  closely-related  MC1  receptor,  which  mediates  tanning  in
response to sun exposure. Other MC1 receptor mediated effects include darkening of skin blemishes, such as freckles and
moles,  and  hair  color  change.  The  cosmetic  effects  are  not  tolerated  by  all  patients,  as  a  small  number  of  patients  have
withdrawn  from  treatment  due  to  tanning.    These  effects  have  generally  been  reversible  in  clinical  trials,  but  it  is  still
unknown if they will be reversible with long-term exposure. The MC1 receptor mediated effects may also carry risks. The
long-term impact of MC1 receptor activation has not been tested in clinical trials, and could potentially include increases in
skin cancer, excess biopsy procedures and cosmetic blemishes. These skin changes may also result in unblinding, which
could make interpretation of clinical trial results more complex and possibly subject to bias. We have also initiated trials of
setmelanotide in potential new indications that include patients who might have more serious underlying conditions, such
as  Alström  syndrome  and  other  indications.  It  is  possible  that  the  underlying  conditions  in  these  patients,  such  as
congestive  heart  failure  and  potentially  other  conditions,  may  confound  the  understanding  of  the  safety  profile  of
setmelanotide.

If  these  or  other  significant  adverse  events  or  other  side  effects  are  observed  in  any  of  our  ongoing  or  planned
clinical trials, we may have difficulty recruiting patients to the clinical trials, patients may drop out of our trials, or we may
be  required  to  abandon  the  trials  or  our  development  efforts  of  that  product  candidate  altogether.  We,  the  FDA,  other
comparable regulatory authorities or an IRB may also suspend clinical trials of a product candidate at any time for various
reasons, including a belief that subjects in such trials are being exposed to unacceptable health risks or adverse side effects.
Some  potential  therapeutics  developed  in  the  biotechnology  industry  that  initially  showed  therapeutic  promise  in  early-
stage trials have later been found to cause side effects that prevented their further development. Even if the side effects do
not preclude setmelanotide from maintaining marketing approval or obtaining additional approvals, undesirable side effects
may inhibit market acceptance due to its tolerability versus other therapies. Any of these developments could materially
adversely affect our business, financial condition and prospects.

Further, if we or others identify undesirable side effects caused by the product, or any other similar product, before

or after regulatory approvals, a number of potentially significant negative consequences could result, including:

● regulatory authorities may request that we withdraw the product from the market or may limit or vary their

approval of the product through labeling or other means;

● regulatory  authorities  may  require  the  addition  of  labeling  statements,  such  as  a  “boxed”  warning  or  a

contraindication;

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● the FDA, the European Commission and other equivalent competent authorities in foreign jurisdictions may
require the addition of a Risk Evaluation and Mitigation Strategy, or REMS, or other specific obligations as a
condition  for  marketing  authorization  due  to  the  need  to  limit  treatment  to  rare  patient  populations,  or  to
address safety concerns;

● we may be required to change the way the product is distributed or administered or change the labeling of the

product;

● we  may  be  required  to  conduct  additional  studies  and  clinical  trials  or  comply  with  other  post-market

requirements to assess possible serious risks;

● we may be required to conduct long term safety follow-up evaluations, including setting up disease and drug

based registries;

● we may decide to remove the product from the marketplace;

● we could be sued and held liable for injury caused to individuals exposed to or taking the product; and

● our reputation may suffer.

Any  of  these  events  could  prevent  us  from  achieving  or  maintaining  market  acceptance  of  setmelanotide  and
could substantially increase the costs of commercializing setmelanotide and significantly impact our ability to successfully
commercialize setmelanotide and generate revenues.

Although we have been granted orphan drug designation for setmelanotide in treating POMC deficiency obesity, LEPR
deficiency  obesity,  Bardet-Biedl  syndrome  and  Alström  syndrome  in  both  the  United  States  and  the  EU,  and  Prader-
Willi syndrome in the EU, we may be unable to obtain orphan drug designation for other uses or to obtain exclusivity in
any use. Even with exclusivity, competitors may obtain approval for different drugs that treat the same indications as
setmelanotide.

The FDA may designate drugs for relatively small patient populations as orphan drugs. Under the Orphan Drug
Act of 1983, or the Orphan Drug Act, the FDA may designate a product candidate as an orphan drug if it is intended to
treat a rare disease or condition, which is defined under the Federal Food, Drug and Cosmetic Act, or FDCA, as having a
patient population of fewer than 200,000 individuals in the United States, or a patient population greater than 200,000 in
the United States where there is no reasonable expectation that the cost of developing the drug will be recovered from sales
in the United States.

Generally,  if  a  product  candidate  with  an  orphan  drug  designation  receives  the  first  marketing  approval  for  the
indication  for  which  it  has  such  designation,  the  product  is  entitled  to  a  period  of  seven  years  of  marketing  exclusivity,
which  precludes  the  FDA  from  approving  another  marketing  application  for  a  product  that  constitutes  the  same  drug
treating the same indication for that marketing exclusivity period, except in limited circumstances.

The exclusivity period in the United States can be extended by six months if the NDA sponsor submits pediatric
data that fairly respond to a written request from the FDA for such data. Orphan drug exclusivity may be revoked if the
FDA  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. Other potential benefits of
orphan drug designation and/or approval of a designated drug include eligibility for: exemption from certain prescription
drug  user  fees,  tax  credits  for  certain  qualified  clinical  testing  expenses,  and  waivers  from  the  pediatric  assessment
requirements of the Pediatric Research Equity Act.

In the EU, orphan drug designation is granted by the European Commission based on a scientific opinion by the
EMA’s  Committee  for  Orphan  Medicinal  Products  in  relation  to  medicinal  products  that  are  intended  for  the  diagnosis,
prevention or treatment of life-threatening or chronically debilitating conditions affecting not more than five in 10,000

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persons  in  the  EU  and  in  relation  to  which  no  satisfactory  method  of  diagnosis,  prevention,  or  treatment  has  been
authorized  (or  the  product  would  be  a  significant  benefit  to  those  affected).  Additionally,  designation  is  granted  for
products  intended  for  the  diagnosis,  prevention,  or  treatment  of  a  life-threatening,  seriously  debilitating  or  serious  and
chronic  condition  and  when,  without  incentives,  it  is  unlikely  that  sales  of  the  medicinal  product  in  the  EU  would  be
sufficient to justify the necessary investment in developing the medicinal product.

In addition to a range of other benefits during the development and regulatory review, orphan medicinal products
are,  upon  grant  of  marketing  authorization,  entitled  to  ten  years  of  exclusivity  in  all  EU  member  states.    Marketing
authorization may, however, be granted to a similar medicinal product with the same orphan indication during the ten-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 the similar product is deemed 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.

Grant of orphan designation by the European Commission also entitles the holder of this designation to financial
incentives  such  as  reduction  of  fees  or  fee  waivers.  Orphan  drug  designation  must  be  requested  before  submitting  an
application for marketing authorization. Orphan drug designation does not, in itself, convey any advantage in, or shorten
the duration of, the regulatory review and authorization process.

We  have  been  granted  orphan  drug  designation  for  setmelanotide  in  treating  POMC  deficiency  obesity,  LEPR
deficiency  obesity,  BBS  and  Alström  syndrome  in  both  the  United  States  and  the  EU.    We  have  been  granted  orphan
designation for setmelanotide in treating Prader-Willi syndrome in the EU.  There can be no assurance that the FDA or the
European Commission will grant such designation for setmelanotide for other uses. In addition, orphan drug designation
neither  shortens  the  development  time  or  regulatory  review  time  of  a  drug  nor  gives  the  drug  any  advantage  in  the
regulatory review or approval process.

Even  if  we  obtain  orphan  drug  exclusivity  for  setmelanotide,  that  exclusivity  may  not  effectively  protect
setmelanotide from competition because different drugs can be approved for the same condition. In the United States, even
after  an  orphan  drug  is  approved,  the  FDA  may  subsequently  approve  another  drug  for  the  same  condition  if  the  FDA
concludes that the latter drug is not the same drug or is clinically superior in that it is shown to be safer, more effective or
makes a major contribution to patient care.  As discussed above, similar rules apply in the EU.

Although we have obtained PRIME designation in the EU and Breakthrough Therapy designation for setmelanotide for
the  treatment  of  obesity  associated  with  genetic  defects  upstream  of  the  MC4R  in  the  leptin-melanocortin  pathway,
which  includes  POMC  deficiency  obesity,  LEPR  deficiency  obesity,  Bardet-Biedl  syndrome  and  Alström  syndrome  in
the  United  States,  the  FDA  may  rescind  the  Breakthrough  Therapy  Designation  and  we  may  be  unable  to  obtain
Breakthrough Therapy designation for other uses. In addition, Breakthrough Therapy designation by the FDA may not
lead  to  a  faster  development,  regulatory  review  or  approval  process,  and  it  does  not  increase  the  likelihood  that
setmelanotide will receive additional marketing approvals in the United States or a marketing authorization in the EU.

  The  FDA  is  authorized  under  the  FDCA  to  give  certain  products  “Breakthrough  Therapy  designation.”  A
Breakthrough Therapy product candidate is defined as a product candidate that is intended, alone or in combination with
one  or  more  other  drugs,  to  treat  a  serious  or  life-threatening  disease  or  condition  and  preliminary  clinical  evidence
indicates  that  such  product  candidate  may  demonstrate  substantial  improvement  on  one  or  more  clinically  significant
endpoints  over  existing  therapies.  The  FDA  will  seek  to  ensure  the  sponsor  of  Breakthrough  Therapy  product  candidate
receives  intensive  guidance  on  an  efficient  drug  development  program,  intensive  involvement  of  senior  managers  and
experienced staff on a proactive, collaborative and cross-disciplinary review.  In addition, the FDA may consider reviewing
portions of an NDA before the sponsor submits the complete application, or rolling review. Product candidates designated
as breakthrough therapies by the FDA may be eligible for other expedited programs, such as priority review, if supported
by clinical data.

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Designation  as  Breakthrough  Therapy  is  within  the  discretion  of  the  FDA.  Accordingly,  even  if  we  believe
setmelanotide  meets  the  criteria  for  designation  as  Breakthrough  Therapy  for  other  uses,  the  FDA  may  disagree.  In  any
event, the receipt of Breakthrough Therapy designation for a product candidate, or acceptance for one or more of the FDA’s
other  expedited  programs,  may  not  result  in  a  faster  development  process,  review  or  approval  compared  to  products
considered  for  approval  under  conventional  FDA  procedures  and  does  not  guarantee  ultimate  approval  by  the  FDA.
Regulatory standards to demonstrate safety and efficacy must still be met.  Additionally, the FDA may later decide that the
product candidate no longer meets the conditions for designation and may withdraw designation at any time or decide that
the time period for FDA review or approval will not be shortened.

The  PRIME  program  was  launched  by  the  EMA  in  2016.  PRIME  is  intended  to  enhance  support  for  the
development of medicines that target an unmet medical need. This voluntary scheme is based on enhanced interaction and
early dialogue with developers of promising medicines, to optimize development plans and speed up evaluation so these
medicines  can  reach  patients  earlier.  In  late  June  2018,  setmelanotide  was  designated  as  PRIME  by  the  CHMP.
Acknowledging that setmelanotide targets an unmet medical need, the EMA offers enhanced support in the development of
the medicinal product through enhanced interaction and early dialogue to optimize our development plans and speed up
regulatory  evaluation  in  the  EU.  As  part  of  this  designation,  the  EMA  has  provided  guidance  to  us  concerning  the
development of setmelanotide. The PRIME designation does not, however, guarantee that the regulatory review process in
the EU will be shorter or less demanding. Neither does the PRIME designation guarantee that the European Commission
will grant a marketing authorization for setmelanotide.

We  may  not  be  able  to  translate  the  once-daily  formulations  of  setmelanotide  for  methods  of  delivery  that  would  be
acceptable to the FDA or other equivalent competent authorities in foreign jurisdictions or commercially successful.

Setmelanotide is currently administered by once-daily SC injection using small insulin-type needles. SC injection
is generally less well-received by patients than other methods of administration, such as oral administration. Considerable
additional  resources  and  efforts,  including  potential  studies,  may  be  necessary  in  order  to  translate  the  once-daily
formulation of setmelanotide into a once-weekly formulation that may be well-received by patients.

We have entered into a license agreement with Camurus AB, or Camurus, for the use of Camurus’ drug delivery
technology,  FluidCrystal,  to  formulate  once-weekly  setmelanotide.  This  formulation,  if  successfully  developed  for
setmelanotide, and approved by the FDA and other regulatory authorities, will be delivered subcutaneously, similar to our
once-daily formulation, except that we anticipate it will be injected once weekly.  

While we have started consultations with regulatory authorities about the potential path for approval of the once-
weekly  formulation,  we  cannot  yet  estimate  the  requirements  for  non-clinical  and  clinical  data,  manufacturing  program,
time, cost, and probability of success for approval.  Regulatory authorities have limited experience evaluating Camurus’
formulations,  which  further  complicates  our  understanding  regarding  the  information  that  may  be  required  to  obtain
approval of a once-weekly formulation.

We  received  FDA  approval  of  the  once-daily  formulation  in  the  initial  NDA  submission  for  chronic  weight
management in patients with obesity due to POMC, PCSK1 or LEPR deficiencies, and plan to seek approval of the once-
weekly formulation at a later time.  While we plan to develop the once-weekly formulation, or to develop other new and
useful  formulations  and  delivery  technology  for  setmelanotide,  we  cannot  estimate  the  probability  of  success,  nor  the
resources  and  time  needed  to  succeed.  If  we  are  unable  to  gain  approval  and  utilize  the  once-weekly  formulation,  or  to
develop  new  formulations,  setmelanotide  may  not  achieve  significant  market  acceptance  and  our  business,  financial
condition and results of operations may be materially harmed.

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Our approach to treating patients with MC4R pathway deficiencies requires the identification of patients with unique
genetic subtypes, for example, POMC genetic deficiency. The FDA or other equivalent competent authorities in foreign
jurisdictions could require the clearance, approval or CE marking of an in vitro companion diagnostic device to ensure
appropriate selection of patients as a condition of approving setmelanotide in additional indications. The requirement
that  we  obtain  clearance,  approval  or  CE  mark  of  an  in  vitro  companion  diagnostic  device  will  require  substantial
financial  resources,  and  could  delay  or  prevent  the  receipt  of  additional  regulatory  approvals  for  setmelanotide,  or
adversely affect those we have already obtained.

We  have  focused  our  development  of  setmelanotide  as  a  treatment  for  obesity  caused  by  certain  genetic
deficiencies affecting the MC4R pathway. To date, we have employed in vitro genetic diagnostic testing to select patients
for  enrollment  in  our  clinical  trials,  including  our  clinical  trials  for  IMCIVREE  and  for  other  potential  indications  for
setmelanotide. If the safe and effective use of any of our product candidates depends on an in vitro diagnostic that is not
otherwise  commercially  available,  then  the  FDA  may  require  approval  or  clearance  of  that  diagnostic,  known  as  a
companion diagnostic, at the same time as, or in connection with, the FDA approval of such product candidates.

If  the  FDA  or  a  comparable  regulatory  authority  requires  clearance  or  approval  of  a  companion  diagnostic  for
setmelanotide, any delay or failure by us or our current and future collaborators to develop or obtain regulatory clearance
or approval of, or to CE mark, such tests, if necessary, could delay or prevent us from obtaining additional approvals for
setmelanotide,  or  adversely  affect  the  approvals  we  have  already  obtained.  For  example,  in  November  2020,  the  FDA
approved IMCIVREE for chronic weight management in adult and pediatric patients 6 years of age and older with obesity
due to POMC, PCSK1, or LEPR deficiencies confirmed by genetic testing demonstrating variants in POMC, PCSK1, or
LEPR genes that are interpreted as pathogenic, likely pathogenic, or of uncertain significance. Although the FDA did not
require  that  we  obtain  approval  of  a  companion  diagnostic  prior  to  approving  the  New  Drug  Application,  or  NDA,  for
IMCIVREE,  in  connection  with  the  NDA  approval  we  agreed  as  a  post-marketing  commitment  to  conduct  adequate
analytical and clinical validation testing to develop and establish an in vitro companion diagnostic device to accurately and
reliably detect patients with variants in the POMC, PCSK1, and LEPR genes that may benefit from setmelanotide therapy.
In September 2020, our collaboration partner, Prevention Genetics, submitted a de novo request seeking FDA authorization
to market such an in vitro companion diagnostic device for IMCIVREE as a Class II medical device. In December 2020,
the FDA sent Prevention Genetics a major deficiency letter in response to the de novo request, which among other things,
placed  the  review  on  hold  and  requested  additional  information  needed  to  support  the  requested  device  classification.
Although we believe that Prevention Genetics will be able to resolve the issues identified in the major deficiency letter,
they may be unsuccessful in doing so, and Prevention Genetics may be required to submit and obtain approval of a PMA
application for the in vitro companion  diagnostic  device  before  we  are  able  to  fulfill  our  post-marketing  commitment  to
FDA,  which  would  lead  to  further  delay  and  could  entail  significant  additional  expense.  If  we  are  unable  to  fulfill  our
postmarket  commitments  for  IMCIVREE  in  a  timely  manner,  the  FDA  could  take  enforcement  action  against  us,  which
could  adversely  affect  our  prospects.  Further,  if  the  FDA  or  a  comparable  regulatory  authority  requires  clearance  or
approval of a companion diagnostic when we seek additional approvals for setmelanotide, any delay or failure by us or our
current  and  future  collaborators  to  develop  or  obtain  regulatory  clearance  or  approval  of,  or  to  CE  mark,  such  tests,  if
necessary,  could  delay  or  prevent  us  from  obtaining  such  additional  approvals  for  setmelanotide,  or  adversely  affect  the
approvals we have already obtained.

We rely, and expect that we will continue to rely, on third parties to conduct clinical trials for setmelanotide. If these
third  parties  do  not  successfully  carry  out  their  contractual  duties  or  meet  expected  deadlines,  we  may  not  be  able  to
obtain  additional  regulatory  approvals  for  or  commercialize  setmelanotide  and  our  business  could  be  substantially
harmed.

We have agreements with third-party CROs to provide monitors for and to manage data for our ongoing clinical
trials. We rely heavily on these parties for the execution of clinical trials for setmelanotide and control only certain aspects
of their activities. As a result, we have less direct control over the conduct, timing and completion of these clinical trials
and the management of data developed through the clinical trials than would be the case if we were relying entirely upon
our  own  staff.  Communicating  with  outside  parties  can  also  be  challenging,  potentially  leading  to  mistakes  as  well  as
difficulties in coordinating activities. However, we remain responsible for the conduct of these trials and are subject to

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enforcement  which  may  include  civil  and  criminal  liabilities  for  any  violations  of  FDA  rules  and  regulations  and  the
comparable foreign regulatory provisions during the conduct of our clinical trials. Outside parties may:

● have staffing difficulties;

● fail to comply with contractual obligations;

● devote inadequate resources to our clinical trials;

● experience regulatory compliance issues;

● undergo changes in priorities or become financially distressed; or

● form more favorable relationships with other entities, some of which may be our competitors.

These  factors  may  materially  adversely  affect  the  willingness  or  ability  of  third  parties  to  conduct  our  clinical
trials  and  may  subject  us  to  unexpected  cost  increases  that  are  beyond  our  control.  Nevertheless,  we  are  responsible  for
ensuring that each of our studies is conducted in accordance with the applicable protocol, legal, regulatory and scientific
standards, and our reliance on CROs does not relieve us of our regulatory responsibilities. We and our CROs are required
to  comply  with  current  GCPs,  which  are  guidelines  enforced  by  the  FDA,  the  competent  authorities  of  the  EU  member
states  and  equivalent  competent  authorities  in  foreign  jurisdictions  for  any  products  in  clinical  development.  The  FDA
enforces  these  regulations  and  cGCP  guidelines  through  periodic  inspections  of  clinical  trial  sponsors,  principal
investigators, and trial sites, and IRBs. If we or our CROs fail to comply with applicable cGCPs, the clinical data generated
in  our  clinical  trials  may  be  deemed  unreliable  and  the  FDA  or  other  equivalent  competent  authorities  in  foreign
jurisdictions may require us to perform additional clinical trials before approving our marketing applications. We cannot
assure you that, upon inspection, the FDA will determine that any of our clinical trials comply with cGCPs. In addition, our
clinical  trials  must  be  conducted  with  products  produced  under  current  Good  Manufacturing  Practices,  or  cGMPs.  Our
failure or the failure of our CROs to comply with these regulations may require us to repeat clinical trials, which would
delay  the  regulatory  approval  process  and  could  also  subject  us  to  enforcement  action  up  to  and  including  civil  and
criminal penalties.

If any of our relationships with these third-party CROs terminate, we may not be able to enter into arrangements
with  alternative  CROs.  If  CROs  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 are compromised due to
the failure to adhere to our clinical protocols, regulatory requirements or for other reasons, any such clinical trials may be
extended, delayed or terminated, and we may not be able to obtain regulatory approval for, or successfully commercialize,
setmelanotide. As a result, our financial results and the commercial prospects for setmelanotide in the subject indication
would be harmed, our costs could increase and our ability to generate revenue could be delayed.

Risks Related to the Commercialization of IMCIVREE (setmelanotide)

The successful commercialization of IMCIVREE and any other product candidates will depend in part on the extent to
which  governmental  authorities,  private  health  insurers,  and  other  third-party  payors  provide  coverage  and  adequate
reimbursement  levels.  Failure  to  obtain  or  maintain  coverage  and  adequate  reimbursement  for  setmelanotide  or  our
other  product  candidates,  if  any  and  if  approved,  could  limit  our  ability  to  market  those  products  and  decrease  our
ability to generate revenue.

Our ability to commercialize IMCIVREE or any product candidates successfully will depend in part on the extent
to  which  coverage  and  reimbursement  for  these  product  candidates  and  related  treatments  will  be  available  from
government  authorities,  private  health  insurers  and  other  organizations.  Government  authorities  and  third-party  payors,
such  as  private  health  insurers  and  health  maintenance  organizations,  decide  which  medications  they  will  pay  for  and
establish reimbursement levels.

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Increasing  efforts  by  governmental  and  third-party  payors  in  the  United  States  and  abroad  to  cap  or  reduce
healthcare costs may cause such organizations to limit both coverage and the level of reimbursement for newly approved
products  and,  as  a  result,  they  may  not  cover  or  provide  adequate  payment.  Even  if  we  show  improved  efficacy  or
improved  convenience  of  administration  with  our  product  candidates,  third-party  payors  may  deny  or  revoke  the
reimbursement status of our product candidates, if approved, or establish prices for our product candidates at levels that are
too low to enable us to realize an appropriate return on our investment. If reimbursement is not available or is available
only at limited levels, we may not be able to successfully commercialize setmelanotide or other product candidates, and
may not be able to obtain a satisfactory financial return. Further, as we continue to grow as an organization, previously-
established prices may no longer be sufficient and could create additional pricing pressure for us.

No  uniform  policy  for  coverage  and  reimbursement  for  products  exist  among  third-party  payors  in  the  United
States. Therefore, 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 may require us to provide scientific and
clinical  support  for  the  use  of  setmelanotide  to  each  payor  separately,  with  no  assurance  that  coverage  and  adequate
reimbursement will be applied consistently or obtained in the first instance. Furthermore, rules and regulations regarding
reimbursement change frequently, in some cases on short notice, and we believe that changes in these rules and regulations
are likely.

In some foreign countries, particularly in Canada and in the EU member states, the pricing and reimbursement of
prescription only medicinal products is subject to strict governmental control which varies widely between countries. In
these countries, pricing negotiations with governmental authorities can take six to twelve months or longer after the receipt
of  regulatory  approval  and  product  launch.  To  obtain  favorable  reimbursement  for  the  indications  sought  or  pricing
approval  in  some  countries,  we  may  be  required  to  conduct  a  clinical  trial  that  compares  the  cost-effectiveness  of
setmelanotide with other available therapies. If reimbursement for setmelanotide is unavailable in any country in which we
seek reimbursement, if it is limited in scope or amount, if it is conditioned upon our completion of additional clinical trials
or if pricing is set at unsatisfactory levels, our operating results could be materially adversely affected.

In the EU, in particular, each EU member state can restrict the range of medicinal products for which its national
health insurance system provides reimbursement and can control the prices of medicinal products for human use marketed
in its territory. As a result, following receipt of marketing authorization in an EU member state, through any application
route, an applicant is required to engage in pricing discussions and negotiations with the competent pricing authority in the
individual  EU  member  states.  Some  EU  member  states  operate  positive  and  negative  list  systems  under  which  products
may only be marketed once a reimbursement price has been agreed upon. Other EU member states approve a specific price
for the medicinal product or may instead adopt a system of direct or indirect controls on the profitability of the company
placing  the  medicinal  product  on  the  market.  The  downward  pressure  on  healthcare  costs  in  general,  particularly
prescription drugs, has become more intense. As a result, increasingly high barriers are being erected to the entry of new
products. In addition, we may face competition for setmelanotide from lower priced products in foreign countries that have
placed price controls on pharmaceutical products.

Health Technology Assessment, or HTA, of medicinal products, however, is becoming an increasingly common
part  of  the  pricing  and  reimbursement  procedures  in  England  and  some  EU  member  states,  including  France,  Germany,
Italy, Spain, the Netherlands, Belgium, Norway and Sweden. HTA is the procedure according to which the assessment of
the public health impact, therapeutic impact and the economic and societal impact of use of a given medicinal product in
the national healthcare systems of the individual country is conducted. HTA generally focuses on the clinical efficacy and
effectiveness, safety, cost, and cost-effectiveness of individual medicinal products as well as their potential implications for
the healthcare system. Those elements of medicinal products are compared with other treatment options available on the
market.  The  outcome  of  HTA  regarding  specific  medicinal  products  will  often  influence  the  pricing  and  reimbursement
status  granted  to  these  medicinal  products  by  the  competent  authorities  of  individual  EU  member  states.  The  extent  to
which pricing and reimbursement decisions are influenced by the HTA of the specific medicinal product varies between
EU  member  states.  In  addition,  pursuant  to  Directive  2011/24/EU  on  the  application  of  patients’  rights  in  cross-border
healthcare, a voluntary network of national authorities or bodies responsible for HTA in the individual EU member states
was established. The purpose of the network is to facilitate and support the exchange of scientific information concerning
HTAs.  This  may  lead  to  harmonization  of  the  criteria  taken  into  account  in  the  conduct  of  HTAs  between  EU  member
states and in pricing and reimbursement decisions and may negatively affect price in at least some EU member states.

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As  a  further  step  in  this  direction,  on  January  31,  2018,  the  European  Commission  adopted  a  proposal  for  a
regulation on HTA. This legislative proposal is intended to boost cooperation among EU member states in assessing health
technologies, including new medicinal products, and providing the basis for cooperation at the EU level for joint clinical
assessments in these areas. The proposal would permit EU member states to use common HTA tools, methodologies, and
procedures across the EU, working together in four main areas, including joint clinical assessment of the innovative health
technologies with the most potential impact for patients, joint scientific consultations whereby developers can seek advice
from  HTA  authorities,  identification  of  emerging  health  technologies  to  identify  promising  technologies  early,  and
continuing voluntary cooperation in other areas. Individual EU member states will continue to be responsible for assessing
non-clinical  (e.g.,  economic,  social,  ethical)  aspects  of  health  technology,  and  making  decisions  on  pricing  and
reimbursement. The European Commission has stated that the role of the draft HTA regulation is not to influence pricing
and  reimbursement  decisions  in  the  individual  EU  member  states.  However,  this  consequence  cannot  be  excluded.   The
related legislative process is currently ongoing with EU member states divided on the proposal.

If we are unable to establish sales and marketing capabilities or enter into agreements with third parties to market and
sell IMCIVREE, we may not be able to generate any revenue.

In  order  to  market  IMCIVREE,  we  must  continue  to  build  our  sales,  marketing,  managerial  and  other  non-
technical capabilities or make arrangements with third parties to perform these services. Although we have received FDA
approval  for  IMCIVREE,  for  chronic  weight  management  in  adult  and  pediatric  patients  6  years  of  age  and  older  with
obesity  due  to  POMC,  PCSK1  or  LEPR  deficiency,  we  are  early  in  our  commercialization  efforts  and  have  not  yet
established  a  full-scale  commercial  infrastructure.  Therefore,  you  should  not  compare  us  to  commercial-stage
biotechnology companies, and you should not expect that we will generate substantial revenues or become profitable in the
near term. If we are unable to establish adequate sales, marketing and distribution capabilities, whether independently or
with  third  parties,  or  if  we  are  unable  to  do  so  on  commercially  reasonable  terms,  our  business,  results  of  operations,
financial condition and prospects would be materially adversely affected.

We may never receive regulatory approval to market setmelanotide outside of the United States.

We are seeking marketing authorization for setmelanotide in the EU and intend to seek marketing authorizations
in other countries worldwide. In order to market any product outside of the United States, we must establish and comply
with  the  numerous  and  varying  safety,  efficacy  and  other  regulatory  requirements  of  other  countries.  Marketing
authorization  procedures  vary  among  countries  and  can  involve  additional  setmelanotide  testing  and  additional
administrative review periods. The time required to obtain marketing authorization in other countries might differ from that
required to obtain FDA approval. The marketing authorization processes in other countries may implicate all of the risks
detailed above regarding FDA approval in the United States as well as other risks. In particular, in many countries outside
of the United States, products must receive pricing and reimbursement approval before the product can be commercialized.
Obtaining  this  approval  can  result  in  substantial  delays  in  bringing  products  to  market  in  such  countries.  Grant  of
marketing authorization in one country does not ensure grant of marketing authorization in another country, but a failure or
delay  in  obtaining  marketing  authorization  in  one  country  may  have  a  negative  effect  on  the  regulatory  process  or
commercial activities in others. Failure to obtain marketing authorization in other countries or any delay or other setback in
obtaining  such  authorizations  would  impair  our  ability  to  market  setmelanotide  in  such  foreign  markets.  Any  such
impairment would reduce the size of our potential market share and could have a material adverse impact on our business,
results of operations and prospects.

We may not achieve market acceptance for IMCIVREE, which would limit the revenue that we generate from the sale
of setmelanotide.

The  commercial  success  of  IMCIVREE  will  also  depend  upon  the  awareness  and  acceptance  of  setmelanotide
within the medical community, including physicians, patients and third-party payors. If IMCIVREE does not achieve an
adequate  level  of  acceptance  by  patients,  physicians  and  third-party  payors,  we  may  not  generate  sufficient  revenue  to
become or remain profitable. Before granting reimbursement approval, third-party payors may require us to demonstrate
that, in addition to treating obesity caused by certain genetic deficiencies affecting the MC4R pathway, IMCIVREE also
provides incremental health benefits to patients. Our efforts to educate the medical community and third-party payors

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about the benefits of IMCIVREE may require significant resources and may never be successful. All of these challenges
may impact our ability to ever successfully market and sell IMCIVREE.

Market acceptance of IMCIVREE will depend on a number of factors, including, among others:

● the ability of IMCIVREE to provide chronic weight management in patients with obesity caused by certain
genetic deficiencies affecting the MC4R pathway and, if required by any competent authority in connection
with  the  approval  for  these  indications,  to  provide  patients  with  incremental  health  benefits,  as  compared
with other available treatments, therapies, devices or surgeries;

● the  complexities  of  genetic  testing,  including  obtaining  genetic  results  that  support  patient  treatment  with

IMCIVREE;

● the relative convenience and ease of SC injections as the necessary method of administration of IMCIVREE,

including as compared with other treatments for obese patients;

● the prevalence and severity of any adverse side effects associated with IMCIVREE;

● limitations  or  warnings  contained  in  the  labeling  approved  for  IMCIVREE  by  the  FDA  or  the  specific
obligations  imposed  as  a  condition  for  marketing  authorization  imposed  by  other  equivalent  competent
authorities in foreign jurisdictions, particularly by the European Commission;

● availability of alternative treatments, including a number of obesity therapies already approved or expected

to be commercially launched in the near future;

● our ability to increase awareness of these diseases among our target populations through marketing and other

cross-functional efforts;

● the  size  of  the  target  patient  population,  and  the  willingness  of  the  target  patient  population  to  try  new

therapies and of physicians to prescribe these therapies;

● the  ability  of  IMCIVREE  to  treat  the  maximum  range  of  pediatric  patients,  and  any  limitations  on  its

indications for use;

● the strength of marketing and distribution support and timing of market introduction of competitive products;

● publicity concerning IMCIVREE or competing products and treatments;

● pricing and cost effectiveness;

● the effectiveness of our sales and marketing strategies;

● our ability to increase awareness of IMCIVREE through marketing efforts;

● our ability to obtain sufficient third-party coverage or reimbursement;

● the willingness of patients to pay out-of-pocket in the absence of third-party coverage; and

● the likelihood that competent authorities in foreign jurisdictions may require development of a REMS as a
condition of approval or post-approval, may not agree with our proposed REMS or may impose additional
requirements that limit the promotion, advertising, distribution or sales of setmelanotide.

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Our industry is intensely competitive. If we are not able to compete effectively against current and future competitors,
we  may  not  be  able  to  generate  revenue  from  the  sale  of  IMCIVREE,  our  business  will  not  grow  and  our  financial
condition and operations will suffer.

The  biotechnology  and  pharmaceutical  industries  are  intensely  competitive  and  subject  to  rapid  and  significant
technological change. We have competitors in a number of jurisdictions, many of which have substantially greater name
recognition,  commercial  infrastructures  and  financial,  technical  and  personnel  resources  than  we  have.  Established
competitors  may  invest  heavily  to  quickly  discover  and  develop  compounds  that  could  make  IMCIVREE  obsolete  or
uneconomical. Any new product that competes with an approved product may need to demonstrate compelling advantages
in  efficacy,  convenience,  tolerability  and  safety  to  be  commercially  successful.    In  addition,  payers  may  require  that
patients  try  other  medications  known  as  step  therapy  or  a  “step-edit,”  including  medications  approved  for  treatment  of
general obesity, before receiving reimbursement for IMCIVREE.  Other competitive factors, including generic competition,
could force us to lower prices or could result in reduced sales. In addition, new products developed by others could emerge
as  competitors  to  IMCIVREE.  If  we  are  not  able  to  compete  effectively  against  our  current  and  future  competitors,  our
business will not grow and our financial condition and operations will suffer.

Currently, IMCIVREE is the only approved treatment for providing chronic weight management in  patients with
obesity due to POMC, PCSK1 or LEPR deficiencies, and there are no approved treatments for chronic weight management
in patients with BBS, Alström syndrome, deficiencies due to a variant in one of the two alleles in the POMC, PCSK1, or
LEPR  genes  (HET  obesity),  SRC1  deficiency  obesity,  SH2B1  deficiency  obesity,  MC4R  deficiency  obesity,  or  Smith-
Magenis  syndrome.  Bariatric  surgery  is  not  a  treatment  option  for  these  genetic  diseases  of  obesity  because  the  severe
obesity  and  hyperphagia  associated  with  these  diseases  are  considered  to  be  risk  factors  for  bariatric  surgery.    Based  on
search results from ClinicalTrials.gov, we are unaware of any competitive products in therapeutic clinical studies for the
obesity and hyperphagia caused by upstream MC4R pathway deficiencies specifically, however LG Chem has represented
it is in early-stage clinical development of an MC4R agonist.  New competitors may emerge which could limit our business
opportunity in the future.

We face potential product liability exposure, and, if claims are brought against us, we may incur substantial liability.

The use of setmelanotide in clinical trials and the sale of IMCIVREE exposes us to the risk of product liability
claims. Product liability claims might be brought against us by patients, healthcare providers or others selling or otherwise
coming into contact with IMCIVREE. For example, we may be sued if any product we develop allegedly causes injury or
is  found  to  be  otherwise  unsuitable  during  product  testing,  manufacturing,  marketing  or  sale.  Any  such  product  liability
claims may include allegations of defects in manufacturing, defects in design or a failure to warn of dangers inherent in the
product,  including  as  a  result  of  interactions  with  alcohol  or  other  drugs,  negligence,  strict  liability  and  a  breach  of
warranties.  Claims  could  also  be  asserted  under  state  consumer  protection  laws  and  any  equivalent  laws  in  foreign
countries. If we become subject to product liability claims and cannot successfully defend ourselves against them, we could
incur  substantial  liabilities.  In  addition,  regardless  of  merit  or  eventual  outcome,  product  liability  claims  may  result  in,
among other things:

● withdrawal of patients from our clinical trials;

● substantial monetary awards to patients or other claimants;

● decreased  demand  for  IMCIVREE  or  any  future  product  candidates  following  marketing  approval,  if

obtained;

● damage to our reputation and exposure to adverse publicity;

● litigation costs;

● distraction of management’s attention from our primary business;

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● loss of revenue; and

● the inability to successfully commercialize IMCIVREE or any future product candidates, if approved.

We  maintain  product  liability  insurance  coverage  for  our  clinical  trials  with  a  $10.0  million  annual  aggregate
coverage  limit.  Our  insurance  coverage  may  be  insufficient  to  reimburse  us  for  any  expenses  or  losses  we  may  suffer.
Moreover, in the future, we may not be able to maintain insurance coverage at a reasonable cost or in sufficient amounts to
protect  us  against  losses,  including  if  insurance  coverage  becomes  increasingly  expensive.  With  the  FDA  approval  for
IMCIVREE, we may seek to expand our insurance coverage to include the sale of commercial products. However, we may
not  be  able  to  obtain  this  product  liability  insurance  on  commercially  reasonable  terms.  Large  judgments  have  been
awarded  in  class  action  lawsuits  based  on  drugs  that  had  unanticipated  side  effects.  The  cost  of  any  product  liability
litigation or other proceedings, even if resolved in our favor, could be substantial, particularly in light of the size of our
business and financial resources. A product liability claim or series of claims brought against us could cause our stock price
to decline and, if we are unsuccessful in defending such a claim or claims and the resulting judgments exceed our insurance
coverage, our financial condition, business and prospects could be materially adversely affected.

We rely completely on third-party suppliers to manufacture our clinical and commercial drug supplies of setmelanotide,
and  we  intend  to  rely  on  third  parties  to  produce  preclinical,  clinical  and  commercial  supplies  of  any  future  product
candidate.

We do not currently have, nor do we plan to acquire, the infrastructure or capability to manufacture our clinical
and commercial drug supply internally for setmelanotide, or any future product candidates, for use in the conduct of our
preclinical  studies  and  clinical  trials,  and  we  lack  the  internal  resources  and  the  capability  to  manufacture  any  product
candidate on a clinical or commercial scale. The facilities used by our contract manufacturing organizations, or CMOs, to
manufacture  the  active  pharmaceutical  ingredient,  or  API,  and  final  drug  product  must  pass  inspection  by  the  FDA  and
other equivalent competent authorities in foreign jurisdictions pursuant to inspections that have been and will be conducted
following submission of our NDAs or relevant foreign regulatory submission to the other equivalent competent authorities
in  foreign  jurisdictions.  Our  failure  or  the  failure  of  our  CMOs  to  pass  preapproval  inspection  of  the  manufacturing
facilities of setmelanotide could delay the regulatory approval process.  In addition, our clinical trials must be conducted
with products produced under cGMP regulations. Our failure or the failure of our CROs or CMOs to comply with these
regulations  may  require  us  to  repeat  clinical  trials,  which  would  delay  the  regulatory  approval  process  and  could  also
subject us to enforcement action, including civil and criminal penalties. When we import any drugs or drug substances, we
would be subject to FDA, United States Department of Agriculture, and U.S. Bureau of Customs and Border Patrol import
regulation requirements. Such enforcement for our failure or our CROs or CMOs’ failure to comply with these regulations
could result in import delays, detention of products, and, depending on criteria such as the history of violative activities, the
FDA  could  place  a  foreign  firm  or  certain  drug  substances  or  products  on  Import  Alert  and  require  that  all  such  drug
substances or products be subject to detention without physical examination which could significantly impact the global
supply  chain  for  setmelanotide.  With  the  exception  of  those  on  the  FDA’s  drug  shortage  list  or  properly  imported  by
individuals,  the  FDCA  prohibits  the  importation  of  prescription  drug  products  for  commercial  use  if  they  were
manufactured  in  a  foreign  country,  unless  they  have  been  approved  or  are  otherwise  authorized  to  be  marketed  in  the
United States and are labeled accordingly.

We currently contract with third parties for the manufacture of setmelanotide and intend to continue to do so in the
future. We have entered into process development and manufacturing service agreements with our CMOs, Corden Pharma
Brussels  S.A.,  or  Corden,  (formerly  Peptisyntha  SA  prior  to  its  acquisition  by  Corden),  PolyPeptide  Group,  Baine
L’Alleud, or PPL, Neuland Laboratories, and Recipharm Monts S.A.S. for certain process development and manufacturing
services  for  regulatory  starting  materials  and/or  drug  substance,  or  API,  and  drug  product  in  connection  with  the
manufacture of setmelanotide. Under our agreements, we pay these third parties for services in accordance with the terms
of mutually agreed upon work orders, which we may enter into from time to time. We may need to engage additional third-
party suppliers to manufacture our clinical and/or commercial, subject to approval, drug supplies. We also have engaged
other  third  parties  to  assist  in,  among  other  things,  distribution,  post-approval  safety  reporting  and  pharmacovigilance
activities. We cannot be certain that we can engage third-party suppliers on terms as favorable as those that are currently in
place.

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We  do  not  perform  the  manufacturing  of  any  drug  products  and  are  completely  dependent  on  our  CMOs  to
comply  with  cGMPs  for  manufacture  of  both  API  and  finished  drug  product.  We  recognize  that  we  are  ultimately
responsible for ensuring that our drug substances and finished drug product are manufactured in accordance with cGMPs,
and, therefore, the company’s management practices and oversight, including routine auditing, are critical. If our CMOs
cannot successfully manufacture material that conform to our specifications and the strict regulatory requirements of the
FDA or other equivalent competent authorities in foreign jurisdictions, they may be subject to administrative and judicial
enforcement for non-compliance and the drug products would be deemed misbranded or adulterated and prohibited from
distribution into interstate commerce. Furthermore, all of our CMOs are engaged with other companies to supply and/or
manufacture  materials  or  products  for  such  companies,  which  exposes  our  manufacturers  to  regulatory  risks  for  the
production of such materials and products.  As a result, failure to satisfy the regulatory requirements for the production of
those  other  company  materials  and  products  may  affect  the  regulatory  clearance  of  our  CMOs’  facilities  generally.  In
addition,  satisfying  the  regulatory  requirements  for  production  of  setmelanotide  with  multiple  suppliers,  while  assuring
more  robust  drug  availability  in  the  future,  adds  additional  complexity  and  risk  to  regulatory  approval.    If  the  FDA  or
another  equivalent  competent  foreign  regulatory  agency  does  not  approve  these  facilities  for  the  manufacture  of
setmelanotide or if it withdraws its approval in the future, we may need to find alternative manufacturing facilities, which
would adversely impact our ability to develop, obtain regulatory approval for or market setmelanotide.  

We are manufacturing finished drug product for use in our upcoming or ongoing clinical trials and for commercial
supply. We believe we currently have a sufficient amount of finished setmelanotide and placebo to complete our ongoing
and  planned  clinical  trials,  and  for  initial  commercial  supply.  However,  these  projections  could  change  based  on  delays
encountered  with  manufacturing  activities,  equipment  scheduling  and  material  lead  times.  Any  such  delays  in  the
manufacturing of finished drug product could delay our planned clinical trials of setmelanotide and our commercial supply,
which could delay, prevent or limit our ability to generate revenue and continue our business.

Moreover, as a result of the COVID-19 pandemic, certain of our suppliers and CMOs in Europe may be affected,
which  could  disrupt  their  activities.  As  a  result,  we  could  face  difficulty  sourcing  key  components  necessary  to  produce
supply  of  setmelanotide,  which  may  negatively  affect  our  clinical  development  and  commercialization  activities.  If  the
COVID-19 coronavirus further impacts business operations, including our CMOs and suppliers, we could face additional
disruption to our supply chain that could affect the supply of drug product for preclinical, clinical trial and commercial use.
Additionally, as our CMOs are producers of drug substances and drug products, including vaccines and therapeutics, they
could be compelled by a national government, or choose themselves, to shift their resources to the production of a COVID-
19 vaccine and/or therapeutics for COVID-19, which could disrupt any scheduled drug substance or drug product batches
we may have and may prevent us from obtaining supplies for our programs in a timely manner to meet our development
timelines.

We do not have long-term supply agreements in place with our contractors, however, we are in the final stages of
negotiations of new long term supply agreements with our CMOs. We currently place individual batch or campaign orders
with the CMOs/suppliers that are individually contracted under existing quality and supply agreements. If we engage new
contractors,  such  contractors  must  be  approved  by  the  FDA  and  other  equivalent  competent  authorities  in  foreign
jurisdictions.  We  will  need  to  submit  information  to  the  FDA  and  other  equivalent  competent  authorities  in  foreign
jurisdictions describing the manufacturing changes. If manufacturing changes occur post-approval, the FDA may have to
approve  these  changes.  We  plan  to  continue  to  rely  upon  CMOs  and,  potentially,  collaboration  partners  to  manufacture
commercial quantities of setmelanotide. Our current scale of manufacturing appears adequate to support all of our current
needs  for  clinical  trial  and  initial  commercial  supplies  for  setmelanotide.  Going  forward,  we  may  need  to  identify
additional CMOs or partners to produce setmelanotide on a larger scale.

Risks Related to Our Intellectual Property Rights

If  we  are  unable  to  adequately  protect  our  proprietary  technology  or  maintain  issued  patents  that  are  sufficient  to
protect setmelanotide, others could compete against us more directly, which would have a material adverse impact on
our business, results of operations, financial condition and prospects.

Our commercial success will depend in part on our success in obtaining and maintaining issued patents and other

intellectual property rights in the United States and elsewhere and protecting our proprietary technology. If we do not

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adequately protect our intellectual property and proprietary technology, competitors may be able to use our technologies
and  erode  or  negate  any  competitive  advantage  we  may  have,  which  could  harm  our  business  and  ability  to  achieve
profitability.

We cannot provide any assurances that any of our patents have, or that any of our pending patent applications that
mature  into  issued  patents  will  include,  claims  with  a  scope  sufficient  to  protect  setmelanotide.  Other  parties  have
developed  technologies  that  may  be  related  or  competitive  to  our  approach,  and  may  have  filed  or  may  file  patent
applications  and  may  have  received  or  may  receive  patents  that  may  overlap  with  our  patent  applications,  either  by
claiming  the  same  methods  or  formulations  or  by  claiming  subject  matter  that  could  dominate  our  patent  position.  The
patent positions of biotechnology and pharmaceutical companies, including our patent position, involve complex legal and
factual questions, and, therefore, the issuance, scope, validity and enforceability of any patent claims that we may obtain
cannot be predicted with certainty.

Although an issued patent is presumed valid and enforceable, its issuance is not conclusive as to its validity or its
enforceability and such patent may not provide us with adequate proprietary protection or competitive advantages against
competitors  with  similar  products.  Patents,  if  issued,  may  be  challenged,  deemed  unenforceable,  invalidated  or
circumvented. U.S. patents and patent applications or the patents and patent application obtained or submitted pursuant to
comparable  foreign  laws,  may  also  be  subject  to  interference  proceedings,  ex  parte  reexamination,  inter  partes  review
proceedings, post-grant review proceedings, supplemental examination and challenges in court. Patents may be subjected
to  opposition  or  comparable  proceedings  lodged  in  various  foreign,  both  national  and  regional,  patent  offices.  These
proceedings could result in either loss of the patent or denial of the patent application or loss or reduction in the scope of
one or more of the claims of the patent or patent application. In addition, such proceedings may be costly. Thus, any patents
that  we  may  own  or  exclusively  license  may  not  provide  any  protection  against  competitors.  Furthermore,  an  adverse
decision in an interference proceeding can result in a third party receiving the patent right sought by us, which in turn could
affect our ability to develop, market or otherwise commercialize setmelanotide.

Competitors  may  also  be  able  to  design  around  our  patents.  Other  parties  may  develop  and  obtain  patent
protection  for  more  effective  technologies,  designs  or  methods.  The  laws  of  some  foreign  countries  do  not  protect  our
proprietary  rights  to  the  same  extent  as  the  laws  of  the  United  States,  and  we  may  encounter  significant  problems  in
protecting our proprietary rights in these countries. If these developments were to occur, they could have a material adverse
effect on our sales.

In addition, proceedings to enforce or defend our patents could put our patents at risk of being invalidated, held
unenforceable  or  interpreted  narrowly.  Such  proceedings  could  also  provoke  third  parties  to  assert  claims  against  us,
including that some or all of the claims in one or more of our patents are invalid or otherwise unenforceable. If any of our
patents  covering  setmelanotide  are  invalidated  or  found  unenforceable,  our  financial  position  and  results  of  operations
would  be  materially  and  adversely  impacted.  In  addition,  if  a  court  found  that  valid,  enforceable  patents  held  by  third
parties  covered  setmelanotide,  our  financial  position  and  results  of  operations  would  also  be  materially  and  adversely
impacted.

The degree of future protection for our proprietary rights is uncertain, and we cannot ensure that:

● any of our patents, or any of our pending patent applications, if issued, will include claims having a scope

sufficient to protect setmelanotide;

● any of our pending patent applications will issue as patents;

● we will be able to successfully commercialize IMCIVREE before our relevant patents expire;

● we were the first to make the inventions covered by each of our patents and pending patent applications;

● we were the first to file patent applications for these inventions;

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● others will not develop similar or alternative technologies that do not infringe our patents;

● any of our patents will be found to ultimately be valid and enforceable;

● any patents issued to us will provide a basis for an exclusive market for our commercially viable products,

will provide us with any competitive advantages or will not be challenged by third parties;

● we will develop additional proprietary technologies or product candidates that are separately patentable; or

● our commercial activities or products will not infringe upon the patents of others.

We rely upon unpatented trade secrets, unpatented know-how and continuing technological innovation to develop
and maintain our competitive position, which we seek to protect, in part, by confidentiality agreements with employees,
consultants,  collaborators  and  vendors.  We  also  have  agreements  with  employees  and  selected  consultants  that  obligate
them to assign their inventions to us. It is possible that technology relevant to our business will be independently developed
by a person who is not a party to such an agreement. We may not be able to prevent the unauthorized disclosure or use of
our technical knowledge or trade secrets by consultants, collaborators, vendors, former employees and current employees.
Furthermore, if the parties to our confidentiality agreements breach or violate the terms of these agreements, we may not
have  adequate  remedies  for  any  such  breach  or  violation,  and  we  could  lose  our  trade  secrets  through  such  breaches  or
violations. Further, our trade secrets could otherwise become known or be independently discovered by our competitors.

We  may  be  involved  in  lawsuits  to  protect  or  enforce  our  patents  or  the  patents  of  our  licensors,  which  could  be
expensive, time-consuming and unsuccessful.

Competitors may infringe our patents or the patents of our licensors. To counter infringement or unauthorized use,
we may be required to file infringement claims, which can be expensive and time-consuming and divert the attention of our
management  and  key  personnel  from  our  business  operations.  Even  if  we  prevail  in  any  lawsuits  that  we  initiate,  the
damages or other remedies awarded may not be commercially meaningful. In addition, in an infringement proceeding, a
court may decide that a patent of ours or our licensors is not valid, is unenforceable and/or is not infringed, 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 or defense proceedings could put one or more of our patents at risk of being
invalidated or interpreted narrowly and could put our patent applications at risk of not issuing.

Interference proceedings provoked by third parties or brought by us may be necessary to determine the priority of
inventions  with  respect  to  our  patents  or  patent  applications  or  those  of  our  licensors.  An  unfavorable  outcome  could
require us to cease using the related technology or to attempt to license rights to it from the prevailing party. Our business
could  be  harmed  if  the  prevailing  party  does  not  offer  us  a  license  on  commercially  reasonable  terms.  Our  defense  of
litigation  or  interference  proceedings  may  fail  and,  even  if  successful,  may  result  in  substantial  costs  and  distract  our
management  and  other  employees.  We  may  not  be  able  to  prevent,  alone  or  with  our  licensors,  misappropriation  of  our
intellectual property rights, particularly in countries where the laws may not protect those rights as fully as in the United
States.

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.  There  could  also  be  public  announcements  of  the  results  of  hearings,  motions  or  other  interim  proceedings  or
developments.  If  securities  analysts  or  investors  perceive  these  results  to  be  negative,  it  could  have  a  material  adverse
effect on the price of our common stock.

We may infringe the intellectual property rights of others, which may prevent or delay our product development efforts
and stop us from commercializing or increase the costs of commercializing IMCIVREE.

Our  success  will  depend  in  part  on  our  ability  to  operate  without  infringing  the  intellectual  property  and
proprietary rights of third parties. We cannot assure you that our business, products and methods do not or will not infringe

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the  patents  or  other  intellectual  property  rights  of  third  parties.  For  example,  numerous  third-party  U.S.  and  non-U.S.
patents and pending applications exist that cover melanocortin receptor analogs and methods of using these analogs.

The  pharmaceutical  industry  is  characterized  by  extensive  litigation  regarding  patents  and  other  intellectual
property rights. Other parties may allege that setmelanotide or the use of our technologies infringes patent claims or other
intellectual property rights held by them or that we are employing their proprietary technology without authorization.

Patent and other types of intellectual property litigation can involve complex factual and legal questions, and their
outcome is uncertain. Any claim relating to intellectual property infringement that is successfully asserted against us may
require  us  to  pay  substantial  damages,  including  treble  damages  and  attorney’s  fees  if  we  are  found  to  be  willfully
infringing  another  party’s  patents,  for  past  use  of  the  asserted  intellectual  property  and  royalties  and  other  consideration
going forward if we are forced or choose to take a license. In addition, if any such claim were successfully asserted against
us  and  we  could  not  obtain  such  a  license,  we  may  be  forced  to  stop  or  delay  developing,  manufacturing,  selling  or
otherwise commercializing IMCIVREE.

If we are unable to avoid infringing the patent rights of others, we may be required to seek a license, defend an
infringement action or challenge the validity of the patents in court, or redesign our products. Patent litigation is costly and
time consuming. We may not have sufficient resources to bring these actions to a successful conclusion.

In  addition,  in  order  to  avoid  infringing  the  intellectual  property  rights  of  third  parties  and  any  resulting
intellectual property litigation or claims, we could be forced to do one or more of the following, which may not be possible
and, even if possible, could be costly and time-consuming:

● cease development and commercialization of setmelanotide;

● pay substantial damages for past use of the asserted intellectual property;

● obtain a license from the holder of the asserted intellectual property, which license may not be available on

reasonable terms, if at all; and

● in the case of trademark claims, rename setmelanotide and/or its trade name IMCIVREE.

Any of these risks coming to fruition could have a material adverse effect on our business, results of operations,

financial condition and prospects.

We may be subject to claims challenging the inventorship or ownership of our patents and other intellectual property.

We may also be subject to claims that former employees, collaborators or other third parties have an ownership
interest in our patents or other intellectual property. Litigation may be necessary to defend against these and other claims
challenging inventorship or ownership. If we fail in defending any such claims, in addition to paying monetary damages,
we may lose valuable intellectual property rights, such as exclusive ownership of, or right to use, such intellectual property.
Such an outcome could have a material adverse effect on our business. Even if we are successful in defending against such
claims, litigation could result in substantial costs and be a distraction to management and other employees.

Issued patents covering setmelanotide could be found invalid or unenforceable if challenged in court.

If we or one of our licensing partners threatened or initiated legal proceedings against a third party to enforce a
patent  covering  setmelanotide,  the  defendant  could  claim  that  the  patent  covering  setmelanotide  is  invalid  and/or
unenforceable. In patent litigation in the United States, defendant counterclaims alleging invalidity and/or unenforceability
are  commonplace.  Grounds  for  a  validity  challenge  include  alleged  failures  to  meet  any  one  of  several  statutory
requirements,  including  novelty,  non-obviousness  and  enablement.  Grounds  for  unenforceability  assertions  include
allegations  that  someone  connected  with  prosecution  of  the  patent  withheld  material  information  from  the  U.S.  PTO,  or
made a misleading statement, during patent prosecution. Third parties may also raise similar claims before administrative

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bodies in the United States or abroad, even outside the context of litigation. Such mechanisms include re-examination, inter
partes review, post grant review and equivalent proceedings in foreign jurisdictions, for example, opposition proceedings.
Such  proceedings  could  result  in  revocation  or  amendment  of  our  patents  in  such  a  way  that  they  no  longer  cover
setmelanotide  or  competitive  products.  The  outcome  following  legal  assertions  of  invalidity  and/or  unenforceability  is
unpredictable. With respect to validity, for example, we cannot be certain that there is no invalidating prior art, of which we
and the patent examiner were unaware during prosecution. If a defendant were to prevail on a legal assertion of invalidity
and/or unenforceability, we would lose at least part, and perhaps all, of the patent protection on setmelanotide. Such a loss
of patent protection would have a material adverse impact on our business.

We do not seek to protect our intellectual property rights in all jurisdictions throughout the world and we may not be
able to adequately enforce our intellectual property rights even in the jurisdictions where we seek protection.

Filing, prosecuting and defending patents on setmelanotide in all countries and jurisdictions throughout the world
would be prohibitively expensive, and our intellectual property rights in some countries outside the United States could be
less extensive than those in the United States. In addition, the laws of some foreign countries do not protect intellectual
property  rights  to  the  same  extent  as  federal  and  state  laws  in  the  United  States.  Consequently,  we  may  not  be  able  to
prevent third parties from practicing our inventions in all countries outside the United States, or from selling or importing
products  made  using  our  inventions  in  and  into  the  United  States  or  other  jurisdictions.  Competitors  may  use  our
technologies in jurisdictions where we have not obtained patent protection to develop their own products and further, may
export otherwise infringing products to territories where we have patent protection, but enforcement is not as strong as that
in  the  United  States.  These  products  may  compete  with  our  product  and  our  patents  or  other  intellectual  property  rights
may not be effective or sufficient to prevent them from competing.

Many companies have encountered significant problems in protecting and defending intellectual property rights in
foreign  jurisdictions.  The  legal  systems  of  certain  countries,  particularly  certain  developing  countries,  do  not  favor  the
enforcement of patents and other intellectual property protection, particularly those relating to biopharmaceuticals, which
could make it difficult for us to stop the infringement of our patents or marketing of competing products in violation of our
proprietary rights generally. For example, an April 2017 report from the Office of the United States Trade Representative
identified  a  number  of  countries,  including  India  and  China,  where  challenges  to  the  procurement  and  enforcement  of
patent rights have been reported. Several countries, including India and China, have been listed in the report every year
since 1989. Proceedings to enforce our patent rights in foreign jurisdictions could result in substantial costs and divert our
efforts  and  attention  from  other  aspects  of  our  business,  could  put  our  patents  at  risk  of  being  invalidated  or  interpreted
narrowly, could put our patent applications at risk of not issuing and could provoke third parties to assert claims against us.
We  may  not  prevail  in  any  lawsuits  that  we  initiate  and  the  damages  or  other  remedies  awarded,  if  any,  may  not  be
commercially  meaningful.  Accordingly,  our  efforts  to  enforce  our  intellectual  property  rights  around  the  world  may  be
inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license.

We are dependent on licensed intellectual property. If we were to lose our rights to licensed intellectual property, we may
not be able to continue developing or commercializing setmelanotide.

We have licensed our rights to setmelanotide from Ipsen Pharma SAS, or Ipsen. Our license with Ipsen imposes
various obligations on us, and provides Ipsen the right to terminate the license in the event of our material breach of the
license agreement, our failure to initiate or complete development of a licensed product, or our commencement of an action
seeking to have an Ipsen licensed patent right declared invalid. Termination of our license from Ipsen would result in our
loss of the right to use the licensed intellectual property, which would materially adversely affect our ability to develop and
commercialize setmelanotide, as well as harm our competitive business position and our business prospects.

We also have licensed from Camurus its drug delivery technology, FluidCrystal, to formulate setmelanotide. Our
license with Camurus imposes various obligations on us, and provides Camurus the right to terminate the license in the
event  of  our  material  breach  of  the  license  agreement.  Termination  of  our  license  from  Camurus  would  result  in  our
inability to use the licensed intellectual property.

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We  may  enter  into  additional  licenses  to  third-party  intellectual  property  that  are  necessary  or  useful  to  our
business.  Future  licensors  may  also  allege  that  we  have  breached  our  license  agreement  and  may  accordingly  seek  to
terminate  our  license  with  them.  In  addition,  future  licensors  may  have  the  right  to  terminate  our  license  at  will.  Any
termination could result in our loss of the right to use the licensed intellectual property, which could materially adversely
affect our ability to develop and commercialize setmelanotide, as well as harm our competitive business position and our
business prospects.

We have not yet registered trademarks for a commercial trade name for setmelanotide in the United States and certain
foreign jurisdictions and failure to secure such registrations could adversely affect our business.

We  have  applied  for,  but  not  yet  received,  registered  trademark  for  the  commercial  trade  name  IMCIVREE
(setmelanotide)  and  its  logo  in  the  United  States,  and  we  have  obtained  trademark  protection  for  IMCIVREE  in  certain
foreign  jurisdictions  and  are  pursuing  trademark  registrations  in  other  jurisdictions.  Our  trademark  applications  may  be
rejected  during  trademark  registration  proceedings.  Although  we  would  be  given  an  opportunity  to  respond  to  those
rejections, we may be unable to overcome them. In addition, in the U.S. PTO and in comparable agencies in many foreign
jurisdictions,  third  parties  are  given  an  opportunity  to  oppose  pending  trademark  applications  and  to  seek  to  cancel
registered  trademarks.  Opposition  or  cancellation  proceedings  may  be  filed  against  our  trademarks,  and  our  trademarks
may not survive those proceedings.

Additionally,  while  the  trade  name  IMCIVREE  has  been  accepted  by  the  FDA,  the  name  IMCIVREE  must  be
approved by the EMA. The objective of the assessment conducted by the EMA is to ensure that there is no risk that the
proposed brand name could create a public-health concern or potential safety risk. In particular the proposed brand name
should not convey misleading therapeutic or pharmaceutical connotations; be misleading with respect to the composition of
the product; or be liable to cause confusion with the brand name of an existing medicinal product in print, handwriting or
speech. If  the  EMA  objects  to  any  of  our  proposed  product  name,  we  may  be  required  to  expend  significant  additional
resources in an effort to identify a suitable substitute name that would be acceptable to the EMA, qualify under applicable
trademark laws and not infringe the existing rights of third parties.

If  we  do  not  obtain  additional  protection  under  the  Hatch-Waxman  Amendments  and  similar  foreign  legislation  by
extending the patent terms and obtaining product exclusivity for setmelanotide, our business may be materially harmed.

Depending upon the timing, duration and specifics of FDA marketing approval for setmelanotide, one or more of
the U.S. patents we license may be eligible for limited patent term restoration under the Drug Price Competition and Patent
Term Restoration Act of 1984, referred to as the Hatch-Waxman Amendments. The Hatch-Waxman Amendments permit a
patent term restoration of up to five years as compensation for patent term lost during product development and the FDA
regulatory  review  process,  and  we  have  applied  to  the  U.S.  PTO  for  patent  term  extension.  However,  we  may  not  be
granted  an  extension  because  of,  for  example,  failure  to  apply  within  applicable  deadlines,  failure  to  apply  prior  to
expiration of relevant patents or otherwise failure to satisfy applicable requirements. Moreover, the applicable time period
or the scope of patent protection afforded could be less than we request. If we are unable to obtain patent term extension or
restoration or the term of any such extension is less than we request, our competitors may obtain approval of competing
products following our patent expiration, and our ability to generate revenues could be materially adversely affected.

Because setmelanotide contains active ingredients that the FDA has determined to be a new chemical entity, it has
been afforded five years of marketing exclusivity by the FDA. Following the expiration of this marketing exclusivity, the
FDA may approve generic products. Manufacturers may seek to launch these generic products following the expiration of
the applicable marketing exclusivity period, even if we still have patent protection for setmelanotide.  Recent legislation
enacted  by  Congress  created,  among  other  things,  new  causes  of  action  against  innovator  companies  that  refuse  to  offer
samples of drugs for purposes of testing and developing generic or biosimilar products or to allow companies to participate
in  a  shared  Risk  Evaluation  and  Mitigation  Strategy  (REMS).    Competition  that  setmelanotide  may  face  from  generic
versions could materially and adversely impact our future revenue, profitability and cash flows and substantially limit our
ability to obtain a return on the investments we have made in setmelanotide.

In the EU, the grant of orphan designation for setmelanotide means that this medicinal product would be entitled,

upon grant of marketing authorization by the European Commission, to ten years of exclusivity in all EU member states.

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Marketing authorization may, however, be granted to a similar medicinal product with the same orphan indication during
the ten year period if we are unable to supply sufficient quantities of setmelanotide. Marketing authorization may also be
granted  to  a  similar  medicinal  product  with  the  same  orphan  indication  if  the  similar  product  is  deemed  safer,  more
effective or otherwise clinically superior to setmelanotide. 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  setmelanotide  is  sufficiently  profitable  not  to
justify maintenance of market exclusivity.

If  we  fail  to  obtain  an  extension  of  patent  protection  under  similar  foreign  legislation,  where  applicable,  our
competitors  may  obtain  approval  of  competing  products  following  our  patent  expiration,  and  our  ability  to  generate
revenues could be materially adversely affected in the foreign countries concerned.

Changes in U.S. patent law could diminish the value of patents in general, thereby impairing our ability to protect our
product.

The  United  States  has  enacted  and  is  currently  implementing  the  America  Invents  Act  of  2011,  wide-ranging
patent  reform  legislation.  Further,  the  U.S.  Supreme  Court  has  ruled  on  several  patent  cases  in  recent  years,  either
narrowing  the  scope  of  patent  protection  available  in  certain  circumstances  or  weakening  the  rights  of  patent  owners  in
certain situations. In addition to increasing uncertainty with regard to our ability to obtain future patents, this combination
of events has created uncertainty with respect to the value of patents, once obtained. Depending on decisions by the U.S.
Congress, the federal courts and the U.S. PTO, the laws and regulations governing patents could change in unpredictable
ways that would weaken our ability to obtain new patents or to enforce our existing patents or future patents.

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

Our  employees  have  been  previously  employed  at  other  biotechnology  or  pharmaceutical  companies,  including
our competitors or potential competitors. We may be subject to claims that these employees or we have inadvertently or
otherwise  used  or  disclosed  trade  secrets  or  other  proprietary  information  of  the  former  employers  of  our  employees.
Litigation may be necessary to defend against these claims. Even if we are successful in defending against these claims,
litigation  could  result  in  substantial  costs  and  be  a  distraction  to  management.  If  we  fail  in  defending  such  claims,  in
addition to paying money damages, we may lose valuable intellectual property rights or personnel. A loss of key personnel
or  their  work  product  could  hamper  or  prevent  our  ability  to  commercialize  setmelanotide,  which  would  materially
adversely affect our commercial development efforts.

Risks Related to Regulatory Approval and Marketing of Setmelanotide and Other Legal Compliance Matters

Even  if  we  complete  the  necessary  clinical  trials,  the  regulatory  and  marketing  approval  process  is  expensive,  time
consuming  and  uncertain  and  may  prevent  us  from  obtaining  additional  approvals  for  the  commercialization  of
setmelanotide beyond FDA approval for obesity due to POMC, PCSK1or LEPR deficiencies in the United States. We
depend  entirely  on  the  success  of  setmelanotide,  and  we  cannot  be  certain  that  we  will  be  able  to  obtain  additional
regulatory approvals for, or successfully commercialize, setmelanotide. If we are not able to obtain, or if there are delays
in obtaining, required additional regulatory approvals, we will not be able to commercialize setmelanotide in additional
indications  in  the  United  States  or  in  foreign  jurisdictions,  and  our  ability  to  generate  revenue  will  be  materially
impaired.

We currently have only one product candidate, setmelanotide, in clinical development, and our business depends
entirely  on  its  successful  clinical  development,  regulatory  approval  and  commercialization.  Setmelanotide,  which  is
currently  approved  by  FDA  for  chronic  weight  management  in  patients  with  obesity  due  to  POMC,  PCSK1  or  LEPR
deficiencies,  and  will  require  substantial  additional  clinical  development,  testing  and  regulatory  approval  before  we  are
permitted to commence commercialization in indications beyond those currently approved for IMCIVREE in the United
States. The clinical trials, manufacturing and marketing of setmelanotide are subject to extensive and rigorous review and
regulation by numerous government authorities in the United States and in other countries where we intend to test and, if
approved, market setmelanotide.  

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Before  obtaining  regulatory  approvals  for  the  commercial  sale  of  any  product  candidate,  we  must  demonstrate
through  non-clinical  testing  and  clinical  trials  that  the  product  candidate  is  safe  and  effective  for  use  in  each  target
indication.  This  process  can  take  many  years  and  approval,  if  any,  may  be  conditional  on  post-marketing  studies  and
surveillance,  and  will  require  the  expenditure  of  substantial  resources  beyond  our  existing  cash  resources.  Of  the  large
number  of  drugs  in  development  in  the  United  States  and  in  other  countries,  only  a  small  percentage  will  successfully
complete  the  FDA  regulatory  approval  process  or  the  equivalent  process  in  foreign  jurisdictions  and  will  be
commercialized.  In  addition,  we  have  not  discussed  all  of  our  proposed  development  programs  with  the  FDA  of  the
competent authorities of foreign jurisdictions. Accordingly, even if we are able to obtain the requisite financing to continue
to  fund  our  development  and  clinical  trials,  we  cannot  assure  you  that  setmelanotide  will  be  successfully  developed  or
commercialized.

In addition, obtaining FDA approval of an NDA for additional indications and the approval of an MAA from the
European  Commission  is  a  complex,  lengthy,  expensive  and  uncertain  process,  and  the  FDA,  EMA  or  equivalent
competent  authorities  in  foreign  jurisdictions  may  delay,  limit  or  deny  approval  of  setmelanotide  for  many  reasons,
including, among others:

● the FDA, the EMA, or other equivalent competent authorities in foreign jurisdictions may disagree with our
interpretation  of  data  from  clinical  trials,  or  may  change  the  requirements  for  approval  even  after  it  has
reviewed and commented on the design for our clinical trials;

● we may not be able to demonstrate to the satisfaction of the FDA, the EMA, or other equivalent competent
authorities  in  foreign  jurisdictions  that  setmelanotide  is  safe  and  effective  in  treating  obesity  caused  by
certain genetic deficiencies affecting the MC4R pathway;

● the results of our clinical trials may not be interpretable or meet the level of statistical or clinical significance
required  by  the  FDA,  the  EMA,  or  other  equivalent  competent  authorities  in  foreign  jurisdictions  for
marketing approval. For example, the potential unblinding of setmelanotide studies due to easily identifiable
AEs may raise the concern that potential bias has affected the clinical trial results;

● the FDA, the EMA, or other equivalent competent authorities in foreign jurisdictions may disagree with the

number, size, conduct or implementation of our clinical trials;

● the  FDA,  the  EMA,  or  other  equivalent  competent  authorities  in  foreign  jurisdictions  may  require  that  we

conduct additional clinical trials or pre-clinical studies;

● the FDA, the EMA, or other equivalent competent authorities in foreign jurisdictions may not consider that

our diagnostic strategy supports approval;

● the  FDA,  the  EMA,  or  other  equivalent  competent  authorities  in  foreign  jurisdictions  may  decide  that
additional  assays  or  data  to  understand  any  risks  for  anti-drug  antibodies  may  need  to  be  available  for
approval;

● the  FDA,  the  EMA,  or  other  equivalent  competent  authorities  in  foreign  jurisdictions  may  decide  that  the
toxicology  program,  including  any  parts  of  carcinogenicity  studies  that  are  filed,  do  not  meet  the
requirements for approval;

● the  FDA,  the  EMA,  or  other  equivalent  competent  authorities  in  foreign  jurisdictions  or  the  applicable
foreign  regulatory  agency  may  identify  deficiencies  in  our  chemistry,  manufacturing  or  controls  of
setmelanotide, or in the commercial production of setmelanotide to support product approval;

● the CROs that we retain to conduct our clinical trials may take actions outside of our control that materially

adversely impact our clinical trials;

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● the FDA, the EMA, or other equivalent competent authorities in foreign jurisdictions may find the data from
preclinical  studies  and  clinical  trials  insufficient  to  demonstrate  that  clinical  and  other  benefits  of
setmelanotide outweigh its safety risks;

● the FDA, the EMA, or other equivalent competent authorities in foreign jurisdictions may disagree with our

interpretation of data from our preclinical studies and clinical trials;

● the FDA, the EMA, or other equivalent competent authorities in foreign jurisdictions may not approve the

formulation, labeling or specifications of setmelanotide;

● the  FDA,  the  EMA,  or  other  equivalent  competent  authorities  in  foreign  jurisdictions  may  not  accept  data

generated at our clinical trial sites;

● the  FDA,  the  EMA,  or  the  equivalent  competent  authorities  in  foreign  jurisdictions  may  require,  as  a
condition  of  approval,  additional  preclinical  studies  or  clinical  trials,  limitations  on  approved  labeling  or
distribution and use restrictions;

● as  part  of  our  NDA  approval,  we  were  required  to  complete  certain  post-market  requirements  and

commitments, which we may not be able to meet;

● the  FDA  may  require  development  of  a  REMS  as  a  condition  of  additional  approvals  or  may  impose

additional requirements that limit the promotion, advertising, distribution, or sales of setmelanotide;

● the European Commission may grant only conditional approval marketing authorization or impose specific
obligations as a condition for marketing authorization, or may require us to conduct post authorization safety
studies as a condition of grant of marketing authorization;

● the FDA or other equivalent competent foreign regulatory agencies may deem our manufacturing processes
or our facilities or the facilities of our CMOs inadequate to preserve the identity, strength, quality, purity, or
potency of our product; or

● the  FDA,  the  European  Commission,  or  the  equivalent  competent  authorities  in  foreign  jurisdictions  may

change its approval policies or adopt new regulations and guidance.

Any  of  these  factors,  many  of  which  are  beyond  our  control,  could  jeopardize  our  ability  to  obtain  additional
regulatory approvals for and successfully market IMCIVREE. Moreover, because our business is entirely dependent upon
setmelanotide, any such setback in our pursuit of regulatory approvals would have a material adverse effect on our business
and prospects.

Disruptions at the FDA and other government agencies caused by funding shortages or global health concerns could
hinder their ability to hire, retain or deploy key leadership and other personnel, or otherwise prevent new or modified
products from being developed, approved or commercialized in a timely manner or at all, which could negatively impact
our business.

The ability of the FDA to review and or approve new products can be affected by a variety of factors, including
government budget and funding levels, statutory, regulatory, and policy changes, the FDA’s ability to hire and retain key
personnel  and  accept  the  payment  of  user  fees,  and  other  events  that  may  otherwise  affect  the  FDA’s  ability  to  perform
routine functions. Average review times at the agency have fluctuated in recent years as a result. In addition, government
funding  of  other  government  agencies  that  fund  research  and  development  activities  is  subject  to  the  political  process,
which is inherently fluid and unpredictable. Disruptions at the FDA and other agencies may also slow the time necessary
for new drugs and biologics to be reviewed and/or approved by necessary government agencies, which would adversely
affect our business.  For example, over the last several years, including for 35 days beginning on December 22, 2018, the

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U.S.  government  has  shut  down  several  times  and  certain  regulatory  agencies,  such  as  the  FDA,  have  had  to  furlough
critical FDA employees and stop critical activities.  

Separately,  in  response  to  COVID-19,  on  March  10,  2020  the  FDA  announced  its  intention  to  postpone  most
foreign inspections of manufacturing facilities and products through April 2020, and subsequently, on March 18, 2020, the
FDA  temporarily  postponed  routine  surveillance  inspections  of  domestic  manufacturing  facilities.  Subsequently,  on  July
10, 2020 the FDA announced its intention to resume certain on-site inspections of domestic manufacturing facilities subject
to a risk-based prioritization system. The FDA intends to use this risk-based assessment system to identify the categories of
regulatory activity that can occur within a given geographic area, ranging from mission critical inspections to resumption
of all regulatory activities.  Regulatory authorities outside the United States may adopt similar restrictions or other policy
measures  in  response  to  the  COVID-19  pandemic.  If  a  prolonged  government  shutdown  occurs,  or  if  global  health
concerns continue to prevent the FDA or other regulatory authorities from conducting their regular inspections, reviews, or
other  regulatory  activities,  it  could  significantly  impact  the  ability  of  the  FDA  or  other  regulatory  authorities  to  timely
review and process our regulatory submissions, which could have a material adverse effect on our business.

Our  failure  to  obtain  marketing  approval  in  foreign  jurisdictions  would  prevent  setmelanotide  from  being  marketed
abroad,  and  any  current  or  future  approvals  we  have  been  or  may  be  granted  for  setmelanotide  in  the  United  States
would not assure approval of setmelanotide in foreign jurisdictions.

In  order  to  market  and  sell  setmelanotide  and  any  other  product  candidate  that  we  may  develop  in  the  EU  and
many  other  jurisdictions,  we  or  our  third-party  collaborators  must  obtain  separate  marketing  authorizations  and  comply
with  numerous  and  varying  regulatory  requirements.  The  marketing  authorization  procedure  varies  among  countries  and
can  involve  additional  testing.  The  time  required  to  obtain  marketing  authorization  may  differ  substantially  from  that
required to obtain FDA approval. The marketing authorization 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, it is required
that the product be approved for reimbursement before the product can be sold in that country. We or these third parties
may not obtain marketing authorization from competent authorities outside the United States on a timely basis, if at all.
Approval  by  the  FDA  does  not  ensure  grant  of  marketing  authorization  by  competent  authorities  in  other  countries  or
jurisdictions, and grant of marketing authorization by one competent authority outside the United States does not ensure
grant of marketing authorization by competent authorities in other countries or jurisdictions or by the FDA. We may not be
able  to  file  for  marketing  authorizations  and  may  not  receive  necessary  marketing  authorization  to  commercialize
setmelanotide in any market. Additionally, the United Kingdom’s withdrawal from the EU, commonly referred to as Brexit,
has resulted in the relocation of the EMA from the United Kingdom to the Netherlands. This relocation has caused, and
may  continue  to  cause,  disruption  in  the  administrative  and  medical  scientific  links  between  the  EMA  and  the  United
Kingdom. Medicines and Healthcare products Regulatory Agency, including delays in granting clinical trial authorization
or  marketing  authorization,  disruption  of  importation  and  export  of  active  substance  and  other  components  of  new  drug
formulations, and disruption of the supply chain for clinical trial product and final authorized formulations. The cumulative
effects  of  the  disruption  to  the  regulatory  framework  may  add  considerably  to  the  development  lead  time  to  marketing
authorization and commercialization of setmelanotide in the EU and/or the United Kingdom.  Any delay in obtaining, or an
inability to obtain, any marketing authorization, as a result of Brexit or otherwise, would prevent us from commercializing
setmelanotide in the United Kingdom and/or the EU and restrict our ability to generate revenue and achieve and sustain
profitability. If any of these outcomes occur, we may be forced to restrict or delay efforts to seek marketing authorization in
the United Kingdom and/or EU for setmelanotide, which could significantly and materially harm our business.

The terms of our current and future potential marketing approvals for setmelanotide and ongoing regulation may limit
how  we  manufacture  and  market  setmelanotide,  and  compliance  with  such  requirements  may  involve  substantial
resources, which could materially impair our ability to generate revenue.

Regulatory  authorities  may  impose  significant  restrictions  on  setmelanotide’s  indicated  uses  or  marketing  or
impose  ongoing  requirements  for  potentially  costly  post  approval  studies.  We  and  setmelanotide  will  also  be  subject  to
ongoing requirements by the FDA, the European Commission, the EMA, and the competent authorities in the EU member
states,  governing  labeling,  packaging,  storage,  advertising,  promotion,  marketing,  distribution,  importation,  exportation,
post-approval changes, manufacturing, recordkeeping, and submission of safety and other post market information.

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Advertising and promotional materials must comply with the FDCA and implementing regulations, and are subject to FDA
oversight and post-marketing reporting obligations, in addition to other potentially applicable federal and state laws.  The
FDA  and  the  other  competent  foreign  authorities  have  significant  post  market  authority,  including,  for  example,  the
authority to require labeling changes based on new safety information and to require post market studies or clinical trials to
evaluate serious safety risks related to the use of a drug. The FDA also has the authority to require, as part of an NDA or
post approval, the submission of a REMS, which may include Elements to Assure Safe Use. Any REMS required by the
FDA  may  lead  to  increased  costs  to  assure  compliance  with  new  post  approval  regulatory  requirements  and  potential
requirements or restrictions on the sale of approved products, all of which could lead to lower sales volume and revenue.
 The holder of an approved NDA also must submit new or supplemental applications and obtain FDA approval for certain
changes to the approved product, product labeling or manufacturing process, or adding new manufacturers.  

Manufacturers of drug products and their facilities may be subject to payment of application and program fees and
are  subject  to  continual  review  and  periodic  inspections  by  the  FDA  and  other  equivalent  competent  authorities  for
compliance with cGMPs and other regulations. If we or a regulatory agency discover problems with setmelanotide, such as
AEs of unanticipated severity or frequency, or problems with the facility where setmelanotide is manufactured or disagrees
with the promotion, marketing or labeling of the product, a regulatory agency may impose restrictions on setmelanotide,
the manufacturer or us, including requiring withdrawal of setmelanotide from the market or suspension of manufacturing.
If we or the manufacturing facilities for setmelanotide fail to comply with applicable regulatory requirements, a regulatory
agency may, among other things:

● issue warning letters or untitled letters;

● seek an injunction or impose civil or criminal penalties or monetary fines;

● vary, suspend or withdraw marketing approval;

● suspend any ongoing clinical trials;

● refuse to approve pending applications or supplements to applications submitted by us;

● suspend or impose restrictions on operations, including costly new manufacturing requirements; or

● seize  or  detain  setmelanotide,  refuse  to  permit  the  import  or  export  of  setmelanotide,  or  request  that  we

initiate a product recall.

Any  government  investigation  of  alleged  violations  of  law  could  require  us  to  expend  significant  time  and
resources in response and could generate negative publicity. The occurrence of any event or penalty described above may
inhibit our ability to commercialize our product candidates and adversely affect our business, financial condition, results of
operations and prospects.

Accordingly,  we  and  our  CMOs  will  continue  to  expend  time,  money  and  effort  in  all  areas  of  regulatory
compliance, including manufacturing, production, product surveillance and quality control. If we are not able to comply
with  post-approval  regulatory  requirements,  we  could  have  the  marketing  approvals  for  setmelanotide  withdrawn  by
regulatory  authorities  and  our  ability  to  market  any  future  products  could  be  limited,  which  could  adversely  affect  our
ability to achieve or sustain profitability. Thus, the cost of compliance with post-approval regulations may have a negative
effect on our operating results and financial condition.

In  addition,  a  sponsor’s  responsibilities  and  obligations  under  the  FDCA  and  FDA  regulations,  and  those  of
equivalent  foreign  regulatory  agencies,  may  change  and  additional  government  regulations  may  be  enacted  that  could
prevent, limit or delay regulatory approval of our product candidates. We cannot predict the likelihood, nature or extent of
government regulation that may arise from future legislation or administrative action, either in the United States or abroad.
For example, the results of the 2020 U.S. Presidential Election may impact our business and industry. Namely, the Trump
administration took several executive actions, including the issuance of a number of Executive Orders, that could impose

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significant  burdens  on,  or  otherwise  materially  delay,  the  FDA’s  ability  to  engage  in  routine  oversight  activities  such  as
implementing statutes through rulemaking, issuance of guidance, and review and approval of marketing applications. It is
difficult to predict whether or how these orders will be implemented, or whether they will be rescinded and replaced under
the Biden administration. The policies and priorities of the new administration are unknown and could materially impact
the regulations governing our product candidates. If we are slow or unable to adapt to changes in existing requirements or
the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may be subject to
enforcement action and we may not achieve or sustain profitability.

Similar  to  the  United  States,  both  marketing  authorization  holders  and  manufacturers  of  medicinal  products  are
subject  to  comprehensive  regulatory  oversight  by  the  EMA  and  the  competent  authorities  of  the  individual  EU  member
states, both before and after grant of the manufacturing and marketing authorizations. This oversight includes control of
compliance  with  cGMP  rules,  which  govern  quality  control  of  the  manufacturing  process  and  require  documentation
policies  and  procedures.  We  and  our  third  party  manufacturers  would  be  required  to  ensure  that  all  of  our  processes,
methods, and equipment are compliant with cGMP. Failure by us or by any of our third party partners, including suppliers,
manufacturers,  and  distributors  to  comply  with  EU  laws  and  the  related  national  laws  of  individual  EU  member  states
governing  the  conduct  of  clinical  trials,  manufacturing  approval,  marketing  authorization  of  medicinal  products,  both
before  and  after  grant  of  marketing  authorization,  and  marketing  of  such  products  following  grant  of  authorization  may
result  in  administrative,  civil,  or  criminal  penalties.  These  penalties  could  include  delays  in  or  refusal  to  authorize  the
conduct of clinical trials or to grant marketing authorization, product withdrawals and recalls, product seizures, suspension,
revocation  or  variation  of  the  marketing  authorization,  total  or  partial  suspension  of  production,  distribution,
manufacturing, or clinical trials, operating restrictions, injunctions, suspension of licenses, fines, and criminal penalties.

In  addition,  EU  legislation  related  to  pharmacovigilance,  or  the  assessment  and  monitoring  of  the  safety  of
medicinal products, provides that the EMA and the competent authorities of the EU member states have the authority to
require companies to conduct additional post-approval clinical efficacy and safety studies. The legislation also governs the
obligations of marketing authorization holders with respect to additional monitoring, AE management and reporting. Under
the  pharmacovigilance  legislation  and  its  related  regulations  and  guidelines,  we  may  be  required  to  conduct  a  labor
intensive collection of data regarding the risks and benefits of marketed products and may be required to engage in ongoing
assessments  of  those  risks  and  benefits,  including  the  possible  requirement  to  conduct  additional  clinical  studies,  which
may be time-consuming and expensive and could impact our profitability. Non-compliance with such obligations can lead
to  the  variation,  suspension  or  withdrawal  of  marketing  authorization  or  imposition  of  financial  penalties  or  other
enforcement measures.

Current  and  future  healthcare  reform  legislation  or  regulation  may  increase  the  difficulty  and  cost  for  us  and  any
future  collaborators  to  commercialize  setmelanotide  and  may  adversely  affect  the  prices  we,  or  they,  may  obtain  and
may have a negative impact on our business and results of operations.

In the United States and some foreign jurisdictions there have been, and continue to be, a number of legislative
and regulatory changes and proposed changes regarding the healthcare system that could, among other things, restrict or
regulate post-approval activities with respect to IMCIVREE and affect our ability, or the ability of any future collaborators,
to profitably sell our products. Among policy makers and payors in the United States and elsewhere, there is significant
interest in promoting changes in healthcare systems with the stated goals of containing healthcare costs, improving quality
and/or expanding access. In the United States, the pharmaceutical industry has been a particular focus of these efforts and
has  been  significantly  affected  by  major  legislative  initiatives.  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 future collaborators, may receive for IMCIVREE or any product candidates
approved for sale.

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In March 2010, President Obama signed into law the Patient Protection and Affordable Care Act, as amended by
the Health Care and Education Reconciliation Act of 2010, or collectively the ACA. The ACA substantially changed the
way  healthcare  is  financed  by  both  governmental  and  private  insurers,  and  significantly  affects  the  U.S.  pharmaceutical
industry.   Among  the  provisions  of  the  ACA  of  importance  to  our  business,  including,  without  limitation,  our  ability  to
commercialize and the prices we may obtain for any product candidates that are approved for sale, are the following:

● 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, although this fee does not apply to sales of certain products approved exclusively for
orphan indications;

● 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;

● expansion  of  manufacturers’  rebate  liability  under  the  Medicaid  Drug  Rebate  Program  by  increasing  the
minimum  rebate  for  both  branded  and  generic  drugs,  revising  the  “average  manufacturer  price”  definition,
and extending rebate liability from fee-for-service Medicaid utilization to include the utilization of Medicaid
managed care organizations as well as Medicaid managed care;

● expansion of the list of entity types eligible for participation in the Public Health Service 340B drug pricing
program,  or  the  340B  program,  to  include  certain  free-standing  cancer  hospitals,  critical  access  hospitals,
rural  referral  centers,  and  sole  community  hospitals,  but  exempting  “orphan  drugs”  from  the  340B  ceiling
price requirements for these covered entities;

● establishment  of  the  Medicare  Part  D  coverage  gap  discount  program,  which  requires  manufacturers  to
provide  a  70%  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;

● a  new  Patient-Centered  Outcomes  Research  Institute  to  oversee,  identify  priorities  in,  and  conduct

comparative clinical effectiveness research, along with funding for such research; and

● establishment of  the Center for Medicare and Medicaid Innovation within CMS to test innovative payment
and service delivery models to lower Medicare and Medicaid spending, including prescription drug spending.

Certain provisions of the ACA have been subject to judicial challenges as well as efforts to repeal or replace them
or to alter their interpretation or implementation. For example, the Tax Cuts and Jobs Act enacted on December 22, 2017,
eliminated the tax-based shared responsibility payment for individuals who fail to maintain minimum essential coverage
under  section  5000A  of  the  Internal  Revenue  Code  of  1986,  as  amended,  or  the  Code,  commonly  referred  to  as  the
“individual  mandate,”    effective  January  1,  2019.    On  December  14,  2018,  a  U.S.  District  Court  Judge  in  the  Northern
District of Texas, ruled that the individual mandate is a critical and inseverable feature of the ACA, and therefore, because
it was repealed as part of the Tax Act, the remaining provisions of the ACA are invalid as well. On December 18, 2019, the
U.S.  Court  of  Appeals  for  the  5th  Circuit  upheld  the  district  court’s  decision  that  the  individual  mandate  was
unconstitutional  but  remanded  the  case  back  to  the  District  Court  to  determine  whether  the  remaining  provisions  of  the
ACA are invalid as well. On March 2, 2020, the U.S. Supreme Court granted the petitions for writs of certiorari to review
the case, although it is unclear when a decision will be made or how the Supreme Court will rule. In addition, there may be
other efforts to challenge, repeal or replace the ACA, or portions thereof, will affect our business.  It is possible that the
ACA,  as  currently  enacted  or  as  it  may  be  amended  in  the  future,  and  other  healthcare  reform  measures  that  may  be
adopted  in  the  future,  could  have  a  material  adverse  effect  on  our  industry  generally  and  on  our  ability  to  successfully
commercialize IMCIVREE or any product candidates, if approved.

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In addition, other legislative changes have been proposed and adopted since the ACA was enacted. For example,
beginning April 1, 2013, Medicare payments for all items and services, including drugs and biologics, were reduced by 2%
under the sequestration required by the Budget Control Act of 2011, as amended by the American Taxpayer Relief Act of
2012.  Subsequent  legislation  extended  the  2%  reduction,  on  average,  to  2029.  These  reductions  will  be  suspended  from
May  1,  2020  through  December  31,  2020  due  to  the  COVID-19  pandemic.  Moreover,  the  federal  government  and  the
individual  states  in  the  United  States  have  become  increasingly  active  in  developing  proposals,  passing  legislation  and
implementing regulations designed to control drug pricing, including price or patient reimbursement constraints, discounts,
formulary  flexibility,  marketing  cost  disclosure  and  transparency  measures.  These  initiatives  may  result  in  additional
reductions in Medicare and other healthcare funding and, if we obtain regulatory approvals, may otherwise affect the prices
we may obtain for setmelanotide or the frequency with which setmelanotide is prescribed or used if approved.

Additional  changes  that  may  affect  our  business  include  the  expansion  of  new  programs  such  as  Medicare
payment for performance initiatives for physicians under the Medicare Access and CHIP Reauthorization Act of 2015, or
MACRA, which was fully implemented in 2019. At this time, it is unclear how the introduction of this Medicare quality
payment  program  will  impact  overall  physician  reimbursement.  The  cost  of  prescription  pharmaceuticals  in  the  United
States  has  also  been  the  subject  of  considerable  discussion  in  the  United  States.  There  have  been  several  Congressional
inquiries, as well as legislative and regulatory initiatives and executive orders designed to, among other things, bring more
transparency  to  product  pricing,  review  the  relationship  between  pricing  and  manufacturer  patient  programs,  and  reform
government  program  reimbursement  methodologies  for  drug  products.    Members  of  Congress  and  the  Biden
Administration  have  indicated  they  will  continue  to  pursue  legislative  or  administrative  measures  to  control  prescription
drug  costs,  although  the  likelihood  of  such  measures  being  adopted  remains  uncertain.  We  cannot  predict  with  certainty
what  impact  any  federal  or  state  health  reforms  will  have  on  us,  but  such  changes  could  impose  new  or  more  stringent
regulatory requirements on our activities or result in reduced reimbursement for our products, any of which could adversely
affect our business, results of operations and financial condition.

We expect that these and other healthcare reform measures that may be adopted in the future may result in more
rigorous coverage and payment criteria and in additional downward pressure on the price that we receive for any approved
drug. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in
payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent
us from being able to generate revenue, attain profitability, or commercialize our drugs. 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  drug
candidates or additional pricing pressures.

The pricing of prescription pharmaceuticals is also subject to governmental control outside the United States. 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  setmelanotide  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.    For  more  details  concerning  the  risks  related  to  pricing  and
reimbursement  in  the  EU,  please  refer  to  the  discussion  in  the  risk  factor  “The  successful  commercialization  of
setmelanotide  and  our  other  product  candidates  will  depend  in  part  on  the  extent  to  which  governmental  authorities,
private  health  insurers,  and  other  third-party  payors  provide  coverage  and  adequate  reimbursement  levels.  Failure  to
obtain or maintain coverage and adequate reimbursement for setmelanotide or our other product candidates, if approved,
could limit our ability to market those products and decrease our ability to generate revenue” in this Annual Report.

If we participate in the Medicaid Drug Rebate Program and fail to comply with our reporting and payment obligations
under that program or other governmental pricing programs that we participate in, we could be subject to additional
reimbursement  requirements,  penalties,  sanctions  and  fines,  which  could  have  a  material  adverse  effect  on  our
business, financial condition, results of operations and growth prospects.

We intend to participate in and have certain price reporting obligations to the Medicaid Drug Rebate Program The
Medicaid Drug Rebate Program  requires participating manufacturers to pay a rebate to each state Medicaid program for
covered outpatient drugs that are dispensed to Medicaid beneficiaries and paid for by a state Medicaid. Those rebates

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are  based  on  pricing  data  that  must  be  reported  on  a  monthly  and  quarterly  basis  to  the  CMS,  the  federal  agency  that
administers  the  Medicaid  Drug  Rebate  Program.  These  data  include  the  average  manufacturer  price  and,  in  the  case  of
innovator  products,  the  best  price  for  each  drug  which,  in  general,  represents  the  lowest  price  available  from  the
manufacturer  to  any  entity  in  the  U.S.  in  any  pricing  structure,  calculated  to  include  all  sales  and  associated  rebates,
discounts  and  other  price  concessions.  Our  failure  to  comply  with  these  price  reporting  and  rebate  payment  obligations
could negatively impact our financial results.

The  ACA  made  significant  changes  to  the  Medicaid  Drug  Rebate  Program,  as  described  under  the  risk  factor
“Current and future healthcare reform legislation or regulation may increase the difficulty and cost for us and any future
collaborators to obtain marketing approval of and commercialize setmelanotide and may adversely affect the prices we, or
they, may obtain and may have a negative impact on our business and results of operations,” above.  Congress could enact
additional legislation that further increases Medicaid drug rebates or other costs and charges associated with participating
in the Medicaid Drug Rebate Program. Additional legislation or the issuance of regulations relating to the Medicaid Drug
Rebate Program could have a material adverse effect on our results of operations.

Federal law requires that any company that participates in the Medicaid Drug Rebate Program also participate in
the  340B  program  in  order  for  federal  funds  to  be  available  for  the  manufacturer’s  drugs  under  Medicaid  and  Medicare
Part  B.  The  340B  program,  which  is  administered  by  the  Health  Resources  and  Services  Administration,  or  HRSA,
requires participating manufacturers to agree to charge statutorily defined covered entities no more than the 340B “ceiling
price” for the manufacturer’s covered outpatient drugs. These 340B covered entities include a variety of community health
clinics and other entities that receive health services grants from the Public Health Service, as well as hospitals that serve a
disproportionate  share  of  low-income  patients.  The  ACA  expanded  the  list  of  covered  entities  to  include  certain  free-
standing  cancer  hospitals,  critical  access  hospitals,  rural  referral  centers  and  sole  community  hospitals,  but  exempts
“orphan drugs” from the ceiling price requirements for these covered entities. The 340B ceiling price is calculated using a
statutory formula based on the average manufacturer price and rebate amount for the covered outpatient drug as calculated
under the Medicaid Drug Rebate Program, and in general, products subject to Medicaid price reporting and rebate liability
are  also  subject  to  the  340B  ceiling  price  calculation  and  discount  requirement.  Any  additional  future  changes  to  the
definition of average manufacturer price and the Medicaid rebate amount under the ACA or other legislation or regulation
could  affect  our  340B  ceiling  price  calculations  and  negatively  impact  our  results  of  operations  if  we  successfully
commercialize setmelanotide.

HRSA  issued  a  final  regulation  regarding  the  calculation  of  the  340B  ceiling  price  and  the  imposition  of  civil
monetary penalties on manufacturers that knowingly and intentionally overcharge covered entities, which became effective
on January 1, 2019.  It remains uncertain how HRSA will apply its enforcement authority under the new regulation.  HRSA
also has implemented reporting requirement pursuant to which participating manufacturers are required to report the 340B
ceiling  prices  for  their  drugs  to  HRSA  every  quarter.    In  addition,  legislation  may  be  introduced  that,  if  passed,  would
further expand the 340B program to additional covered entities or would require participating manufacturers to agree to
provide 340B discounted pricing on drugs used in an inpatient setting.

 Pricing and rebate calculations vary among products and programs. The calculations are complex and are often
subject to interpretation by us, governmental or regulatory agencies, and the courts. If we participate in the Medicaid Drug
Rebate Program and consequently the 340B program, we could be held liable for errors associated with our submission of
pricing  data.  In  addition  to  retroactive  Medicaid  rebates  and  the  potential  for  340B  program  refunds,  if  we  are  found  to
have knowingly submitted false average manufacturer price or best price information to the government, we may be liable
for significant civil monetary penalties per item of false information. Civil monetary penalties can also be applied if we are
found  to  have  charged  340B  covered  entities  more  than  the  statutorily  mandated  ceiling  price.  Our  failure  to  submit
monthly/quarterly  average  manufacturer  price  and  best  price  data  on  a  timely  basis  could  result  in  a  significant  civil
monetary penalty per day for each day the information is late beyond the due date. Such failure also could be grounds for
CMS  to  terminate  our  Medicaid  drug  rebate  agreement,  pursuant  to  which  we  would  be  participating  in  the  Medicaid
program. In the event that CMS terminates our rebate agreement, no federal payments would be available under Medicaid
or Medicare Part B for our covered outpatient drugs.

CMS and the Department of Health & Human Services Office of Inspector General have pursued manufacturers

that were alleged to have failed to report these data to the government in a timely manner. Governmental agencies may

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also  make  changes  in  program  interpretations,  requirements  or  conditions  of  participation,  some  of  which  may  have
implications for amounts previously estimated or paid. We cannot assure you that any submissions we are required to make
under  the  Medicaid  Drug  Rebate  Program  and  consequently  the  340B  program  will  not  be  found  to  be  incomplete  or
incorrect.

In  order  for  IMCIVREE  or  any  product  candidates,  if  approved,  to  be  paid  for  with  federal  funds  under  the
Medicaid  and  Medicare  Part  B  programs  and  purchased  by  certain  federal  agencies  and  grantees,  we  also  intend  to
participate in the U.S. Department of Veterans Affairs, or VA, Federal Supply Schedule, or FSS, pricing program. As part
of this program, we would be obligated to make our products available for procurement on an FSS contract under which
we  must  comply  with  standard  government  terms  and  conditions  and  charge  a  price  that  is  no  higher  than  the  statutory
Federal Ceiling Price, or FCP, to four federal agencies (VA, U.S. Department of Defense, or DOD, Public Health Service,
and U.S. Coast Guard).

The FCP is based on the Non-Federal Average Manufacturer Price, or Non-FAMP, which we would be required to
calculate  and  report  to  the  VA  on  a  quarterly  and  annual  basis.  Pursuant  to  applicable  law,  knowing  provision  of  false
information in connection with a Non-FAMP filing can subject a manufacturer to significant civil monetary penalties for
each  item  of  false  information.  The  FSS  pricing  and  contracting  obligations  also  contain  extensive  disclosure  and
certification requirements.

If we successfully commercialize our products, we also would participate in the Tricare Retail Pharmacy program,
under which we would be required to pay quarterly rebates on utilization of innovator products that are dispensed through
the  Tricare  Retail  Pharmacy  network  to  Tricare  beneficiaries.  The  rebates  are  calculated  as  the  difference  between  the
annual Non-FAMP and FCP. We would be required to list our innovator products on a Tricare Agreement in order for them
to  be  eligible  for  DOD  formulary  inclusion.  If  we  overcharge  the  government  in  connection  with  our  FSS  contract  or
Tricare  Agreement,  whether  due  to  a  misstated  FCP  or  otherwise,  we  would  be  required  to  refund  the  difference  to  the
government.  Failure  to  make  necessary  disclosures  and/or  to  identify  contract  overcharges  could  result  in  allegations
against  us  under  the  False  Claims  Act  and  other  laws  and  regulations.  Unexpected  refunds  to  the  government,  and
responding to a government investigation or enforcement action, would be expensive and time-consuming, and could have
a material adverse effect on our business, financial condition, results of operations and growth prospects.

The FDA and other regulatory agencies actively enforce the laws and regulations prohibiting the promotion of off-label
uses.

In  the  United  States,  the  FDA  strictly  regulates  marketing,  labeling,  advertising  and  promotion  of  prescription
drugs.    These  regulations  include  standards  and  restrictions  for  direct-to-consumer  advertising,  industry-sponsored
scientific and educational activities, promotional activities involving the internet and off-label promotion. Any regulatory
approval that the FDA grants is limited to those specific diseases and indications for which a product is deemed to be safe
and effective by the FDA.  For example, the FDA-approved label for IMCIVREE is limited to chronic weight management
in adult and pediatric patients 6 years of age and older with obesity due to POMC, PCSK1, or LEPR deficiency confirmed
by  genetic  testing  demonstrating  variants  in  POMC,  PCSK1,  or  LEPR  genes  that  are  interpreted  as  pathogenic,  likely
pathogenic,  or  of  uncertain  significance.    In  addition  to  the  FDA  approval  required  for  new  formulations,  any  new
indication for an approved product also requires FDA approval. If we are not able to obtain FDA approval for any desired
future indications for our drugs and drug candidates, our ability to effectively market and sell our products may be reduced
and our business may be adversely affected.

While physicians in the United States may choose, and are generally permitted, to prescribe drugs for uses that are
not  described  in  the  product’s  labeling  and  for  uses  that  differ  from  those  tested  in  clinical  trials  and  approved  by  the
regulatory  authorities,  our  ability  to  promote  the  products  is  narrowly  limited  to  those  indications  that  are  specifically
approved by the FDA.  These “off-label” uses are common across medical specialties and may constitute an appropriate
treatment for some patients in varied circumstances. For example, we are actively evaluating IMCIVREE in subjects with
other forms of obesity caused by defects in the MCR4 pathway. We are not currently permitted to, and do not, market or
promote setmelanotide for these uses.  

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Regulatory authorities in the United States generally do not regulate the behavior of physicians in their choice of
treatments.  Regulatory authorities do, however, restrict communications by pharmaceutical companies on the subject of
off-label use. Although recent court decisions suggest that certain off-label promotional activities may be protected under
the  First  Amendment,  the  scope  of  any  such  protection  is  unclear.    If  our  promotional  activities  fail  to  comply  with  the
FDA’s  regulations  or  guidelines,  we  may  be  subject  to  warnings  from,  or  enforcement  action  by,  these  authorities.    In
addition, our failure to follow FDA rules and guidelines relating to promotion and advertising may cause the FDA to issue
warning letters or untitled letters, bring an enforcement action against us, suspend or withdraw an approved product from
the market, require a recall or institute fines or civil fines, or could result in disgorgement of money, operating restrictions,
injunctions or criminal prosecution, any of which could harm our reputation and our business.

In  the  EU,  the  advertising  and  promotion  of  our  products  are  subject  to  EU  laws  governing  promotion  of
medicinal products, interactions with physicians, misleading and comparative advertising and unfair commercial practices.
In  addition,  other  legislation  adopted  by  individual  EU  member  states  may  apply  to  the  advertising  and  promotion  of
medicinal products. These laws require that promotional materials and advertising in relation to medicinal products comply
with the product’s Summary of Product Characteristics, or SmPC, as approved by the competent authorities. The SmPC is
the  document  that  provides  information  to  physicians  concerning  the  safe  and  effective  use  of  the  medicinal  product.  It
forms  an  intrinsic  and  integral  part  of  the  marketing  authorization  granted  for  the  medicinal  product.  Promotion  of  a
medicinal  product  that  does  not  comply  with  the  SmPC  is  considered  to  constitute  off-label  promotion.  The  off-label
promotion of medicinal products is prohibited in the EU. The applicable laws at EU level and in the individual EU member
states  also  prohibit  the  direct-to-consumer  advertising  of  prescription-only  medicinal  products.  Violations  of  the  rules
governing  the  promotion  of  medicinal  products  in  the  EU  could  be  penalized  by  administrative  measures,  fines  and
imprisonment. These laws may further limit or restrict the advertising and promotion of our products to the general public
and may also impose limitations on our promotional activities with health care professionals.

We may be subject to federal and state healthcare and privacy laws and regulations. If we are unable to comply or have
not  fully  complied  with  such  laws  and  regulations,  we  could  face  criminal  sanctions,  damages,  substantial  civil
penalties, reputational harm and diminished profits and future earnings.

Healthcare providers, physicians and others will play a primary role in the recommendation and prescription of
setmelanotide,  if  approved.  Our  arrangements  and  interactions  with  healthcare  professionals,  third-party  payors,  patients
and others will expose us to broadly applicable fraud and abuse, anti-kickback, false claims and other healthcare laws and
regulations that may constrain the business or financial arrangements and relationships through which we market, sell and
distribute setmelanotide, if we obtain marketing approval. The U.S. federal and state healthcare laws and regulations that
may affect our ability to operate include, but are not limited to:

● The  United  States  federal  healthcare  Anti-Kickback  Statute,  which  prohibits,  among  other  things,  persons
and entities from knowingly and willfully soliciting, offering, paying, or receiving remuneration, (anything of
value), directly or indirectly, in cash or in kind, to induce or reward either the referral of an individual for, or
the  purchase,  lease  order  or  arranging  for  or  recommending  the  purchase,  lease  or  order  of  any  good  or
service  for  which  payment  may  be  made,  in  whole  or  in  part,  by  federal  healthcare  programs  such  as
Medicare and Medicaid. This statute has been interpreted to apply to arrangements between pharmaceutical
companies on one hand and prescribers, purchasers, formulary managers, and patients on the other. Liability
under  the  Anti-Kickback  Statute  may  be  established  without  proving  actual  knowledge  of  the  statute  or
specific intent to violate it. In addition, the government may assert that a claim including items or services
resulting  from  a  violation  of  the  federal  Anti-Kickback  Statute  constitutes  a  false  or  fraudulent  claim  for
purposes  of  the  federal  civil  False  Claims  Act.  Although  there  are  a  number  of  statutory  exceptions  and
regulatory  safe  harbors  to  the  federal  Anti-Kickback  Statute  protecting  certain  common  business
arrangements  and  activities  from  prosecution  or  regulatory  sanctions,  the  exceptions  and  safe  harbors  are
drawn  narrowly.  Practices  that  involve  remuneration  to  those  who  prescribe,  purchase,  or  recommend
pharmaceutical and biological products, including certain discounts, or engaging such individuals or patients
as  consultants,  advisors,  or  speakers,  may  be  subject  to  scrutiny  if  they  do  not  fit  squarely  within  an
exception or safe harbor. Our practices may not in all cases meet all of the criteria for safe harbor protection
from  anti-kickback  liability.  Moreover,  there  are  no  safe  harbors  for  many  common  practices,  such  as
educational  and  research  grants,  charitable  donations,  product  and  patient  support  programs.    In  October
2019, the federal government

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published  a  proposed  regulation  creating  new  safe  harbors  for,  among  other  things,  certain  value-based
arrangements and patient engagement tools, and that modifies and clarifies the scope of existing safe harbors
for  warranties  and  personal  service  agreements.    The  impact  of  the  proposed  regulation  on  our  current  or
contemplated operations is not clear even if the proposed regulation is finalized.

● The  federal  civil  False  Claims  Act  prohibits  individuals  or  entities  from,  among  other  things,  knowingly
presenting,  or  causing  to  be  presented  a  false  or  fraudulent  claim  for  payment  of  government  funds,  or
knowingly making, using or causing to made or used a false record or statement material to an obligation to
pay money to the government or knowingly concealing or knowingly and improperly avoiding, decreasing or
concealing an obligation to pay money to the federal government. Actions under the False Claims Act may
be  brought  by  the  Attorney  General  or  as  a  qui  tam  action  by  a  private  individual  in  the  name  of  the
government. Such private individuals may share in amounts paid by the entity to the government in recovery
or  settlement.  Many  pharmaceutical  manufacturers  have  been  investigated  and  have  reached  substantial
financial settlements with the federal government under the civil False Claims Act for a variety of alleged
improper  activities  including  causing  false  claims  to  be  submitted  as  a  result  of  the  marketing  of  their
products for unapproved and thus non-reimbursable uses, inflating prices reported to private price publication
services  which  are  used  to  set  drug  payment  rates  under  government  healthcare  programs,  and  other
interactions  with  prescribers  and  other  customers  including  those  that  may  have  affected  their  billing  or
coding  practices  and  submission  to  the  federal  government.  The  government  may  assert  that  a  claim
including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false
or fraudulent claim for purposes of the federal civil False Claims Act. False Claims Act liability is potentially
significant  in  the  healthcare  industry  because  the  statute  provides  for  treble  damages  and  significant
mandatory  penalties  per  false  or  fraudulent  claim  or  statement  for  violations.  Because  of  the  potential  for
large  monetary  exposure,  healthcare  and  pharmaceutical  companies  often  resolve  allegations  without
admissions of liability for significant and material amounts to avoid the uncertainty of treble damages and
per  claim  penalties  that  may  be  awarded  in  litigation  proceedings.  Settlements  may  require  companies  to
enter  into  corporate  integrity  agreements  with  the  government,  which  may  impose  substantial  costs  on
companies  to  ensure  compliance.  Pharmaceutical  and  other  healthcare  companies  also  are  subject  to  other
federal  false  claims  laws,  including,  among  others,  federal  criminal  healthcare  fraud  and  false  statement
statutes that extend to non-government health benefit programs.

● The  federal  Health  Insurance  Portability  and  Accountability  Act  of  1996,  as  amended  by  the  Health
Information  Technology  for  Economic  and  Clinical  Health  Act,  or  HIPAA,  imposes  criminal  and  civil
liability  for  executing  a  scheme  to  defraud  any  healthcare  benefit  program,  including  private  third-party
payors,  and also imposes obligations, with respect to safeguarding the privacy, security and transmission of
individually  identifiable  health  information.  Penalties  for  failure  to  comply  with  a  requirement  of  HIPAA
vary significantly and include civil monetary penalties as well as criminal penalties for knowingly obtaining
or  disclosing  individually  identifiable  health  information  in  violation  of  HIPAA.  The  criminal  penalties
increase  if  the  wrongful  conduct  involves  false  pretenses  or  the  intent  to  sell,  transfer  or  use  identifiable
health  information  for  commercial  advantage,  personal  gain  or  malicious  harm.    HIPAA  also  prohibits
knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false,
fictitious  or  fraudulent  statement  or  representation,  or  making  or  using  any  false  writing  or  document
knowing  the  same  to  contain  any  materially  false,  fictitious  or  fraudulent  statement  or  entry  in  connection
with the delivery of or payment for healthcare benefits, items or services. Similar to the federal healthcare
Anti-Kickback Statute, a person or entity does not need to have actual knowledge of the statute or specific
intent to violate it to have committed a violation.  Pharmaceutical and other healthcare companies also are
subject to state laws governing the privacy and security of health, genetic, sensitive condition and personally
identifiable information, many of which enable a state attorney general to bring actions and provide private
rights of action to consumers as enforcement mechanisms.  There is also heightened sensitivity for minors’
information, which may be subject to additional protections. Federal regulators, state attorneys general, and
plaintiffs’ attorneys have been and will likely continue to be active in this space.

● The federal Physician Payments Sunshine Act, implemented as the Open Payments Program, requires certain
manufacturers of drugs, devices, biologics and medical supplies to report payments and other transfers of

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value  to  physicians  for  which  payment  is  available  under  Medicare,  Medicaid  or  the  Children’s  Health
Insurance  Program  (with  certain  exceptions)  to  report  annually  to  the  United  States  Department  of  Health
and  Human  Services,  Centers  for  Medicare  and  Medicaid  Services,  information  related  to  physicians
(defined to include doctors, dentists, optometrists, podiatrists, and chiropractors) and teaching hospitals, as
well  as  ownership  and  investment  interests  held  by  physicians  and  their  immediate  family  members.
Beginning in 2022, applicable manufacturers also will be required to report information regarding payments
and transfers of value provided to physician assistants, nurse practitioners, clinical nurse specialists, certified
nurse  anesthetists,  and  certified  nurse-midwives.  Manufacturers  must  submit  reports  on  or  before  the
90th day of each calendar year disclosing reportable payments made in the previous calendar year.

● Analogous state laws and regulations, such as state anti-kickback and false claims laws, which may apply to
items or services reimbursed under Medicaid and other state programs or, in several states, regardless of the
payer,  including  private  insurers.  Some  state  laws  require  pharmaceutical  companies  to  report  expenses
relating  to  the  marketing  and  promotion  of  pharmaceutical  products  and  to  report  gifts  and  payments  to
individual health care providers in those states. Some of these states also prohibit certain marketing-related
activities including the provision of gifts, meals, or other items to certain health care providers. Some states
restrict the ability of manufacturers to offer co-pay support to patients for certain prescription drugs. Some
states require the posting of information relating to clinical studies and their outcomes. Other states and cities
require identification or licensing of sales representatives. In addition, several states require pharmaceutical
companies to implement compliance programs or marketing codes of conduct.

● Similar restrictions are imposed on the promotion and marketing of medicinal products in the EU member
states  and  other  countries,  including  restrictions  on  interactions  with  healthcare  professionals  and
requirements  for  public  disclosure  of  payments  made  to  physicians.  Laws  (including  those  governing
promotion, marketing and anti-kickback provisions), industry regulations and professional codes of conduct
often are strictly enforced. Even in those countries where we may decide not to directly promote or market
our products, inappropriate activity by our international distribution partners could have implications for us.

Ensuring  that  our  business  arrangements  and  interactions  with  healthcare  professionals,  third-party  payors,
patients and others comply with applicable healthcare laws and regulations will require substantial resources. Various state
and  federal  regulatory  and  enforcement  agencies  continue  actively  to  investigate  violations  of  health  care  laws  and
regulations,  and  the  United  States  Congress  continues  to  strengthen  the  arsenal  of  enforcement  tools.  The  BBA  of  2018
increased the criminal and civil penalties that can be imposed for violating certain federal health care laws, including the
Anti-Kickback Statute.  

It is possible that governmental authorities will conclude that our business practices do not comply with current or
future  statutes,  regulations  or  case  law  involving  applicable  fraud  and  abuse,  privacy,  or  other  healthcare  laws  and
regulations.  If  our  operations,  including  our  engagements  with  healthcare  professionals,  researchers  and  patients,  or  our
disease awareness and/or patient identification initiatives including genetic testing programs, or anticipated activities to be
conducted by our field teams, were 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  costly  investigations,  significant  civil,  criminal  and  administrative  monetary
penalties, imprisonment, damages, fines, disgorgement, exclusion from government funded healthcare programs, such as
Medicare and Medicaid, contractual damages, diminished profits and future earnings, and the curtailment or restructuring
of  our  operations,  any  of  which  could  substantially  disrupt  our  operations  or  financial  results.  Although  compliance
programs  can  mitigate  the  risk  of  investigation  and  prosecution  for  violations  of  these  laws,  the  risks  cannot  be  entirely
eliminated. Any action against us for violation of these laws or regulations, even if we successfully defend against it, could
cause us to incur significant legal expenses and generate negative publicity, which could harm our financial condition and
divert our management’s attention from the operation of our business.

Our  employees  may  engage  in  misconduct  or  other  improper  activities,  including  violating  applicable  regulatory
standards and requirements or engaging in insider trading, which could significantly harm our business.

We  are  exposed  to  the  risk  of  employee  fraud  or  other  misconduct.  Misconduct  by  employees  could  include

intentional failures to comply with the regulations of the FDA and applicable non-U.S. regulators, provide accurate

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information to the FDA and applicable non-U.S. regulators, comply with healthcare fraud and abuse laws and regulations
in the United States and abroad, report financial information or data accurately or disclose unauthorized activities to us. In
particular,  sales,  marketing  and  business  arrangements  in  the  healthcare  industry  are  subject  to  extensive  laws  and
regulations  intended  to  prevent  fraud,  misconduct,  kickbacks,  self-dealing  and  other  abusive  practices.  These  laws  and
regulations restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission, customer
incentive  programs  and  other  business  arrangements.  Employee  misconduct  could  also  involve  the  improper  use  of,
including trading on, information obtained in the course of clinical trials, which could result in regulatory sanctions and
serious harm to our reputation. It is not always possible to identify and deter employee misconduct, and any precautions we
take  to  detect  and  prevent  this  activity  may  be  ineffective  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 comply with these
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, including the imposition of significant
fines  or  other  sanctions.  Some  of  these  laws  and  related  risks  are  described  under  the  risk  factor  “We may be subject to
federal and state healthcare laws and regulations. If we are unable to comply or have not fully complied with such laws
and regulations, we could face criminal sanctions, damages, substantial civil penalties, reputational harm and diminished
profits and future earnings” of this Annual Report.

Our  failure  to  comply  with  data  protection  laws  and  regulations  could  lead  to  government  enforcement  actions  and
significant penalties against us, and adversely impact our operating results.

We are subject to U.S. data protection laws and regulations, for example, laws and regulations that address privacy
and data security, at both the federal and state levels. The legislative and regulatory landscape for data protection continues
to evolve, and in recent years there has been an increasing focus on privacy and data security issues. Numerous federal and
state laws, including state data breach notification laws, state health information privacy laws, state genetic privacy laws,
and federal and state consumer protection laws, including, for example, Section 5 of the Federal Trade Commission Act of
1914, as amended, and the CCPA, govern the collection, use, and disclosure and protection of certain health-related and
other  personal  information.  Failure  to  comply  with  data  protection  laws  and  regulations  could  result  in  government
enforcement actions and create liability for us, which could include civil and/or criminal penalties, private litigation and/or
adverse  publicity  that  could  negatively  affect  our  operating  results  and  business.  In  addition,  we  may  obtain  health
information  from  third  parties,  such  as  research  institutions  with  which  we  collaborate,  that  are  subject  to  privacy  and
security requirements under HIPAA. Although we are not directly subject to HIPAA, other than potentially with respect to
providing  certain  employee  benefits,  we  could  be  subject  to  criminal  penalties  if  we  knowingly  obtain  or  disclose
individually identifiable health information maintained by a HIPAA covered entity in a manner that is not authorized or
permitted by HIPAA.  In addition, state laws govern the privacy and security of health, research and genetic information in
specified circumstances, many of which differ from each other in significant ways and may not have the same effect, thus
complicating compliance efforts.  Some of our research activities involve minors, which may be subject to additional laws
and can require specialized consent processes, privacy protections, and compliance procedures.  

The  EU,  United  Kingdom,  Switzerland  and  other  countries  have  also  adopted  data  protection  laws  and
regulations, which impose significant compliance obligations. In the EU, the collection and use of personal data, including
health and genetic data, is governed by the provisions of the General Data Protection Regulation, or GDPR. The GDPR
became effective on May 25, 2018, repealing the Data Protection Directive and increasing our responsibility and liability in
relation to the processing of personal data of EU subjects. Fines for certain breaches of the GDPR are significant, up to the
greater of 20 million Euros or 4 % of total global annual turnover. In addition to the foregoing, a breach of the GDPR could
result  in  regulatory  investigations,  reputational  damage,  orders  to  cease/change  our  processing  of  our  data,  enforcement
notices, and/or assessment notices (for a compulsory audit). We may also face civil claims including representative actions
and  other  class  action  type  litigation  (where  individuals  have  suffered  harm),  potentially  amounting  to  significant
compensation  or  damages  liabilities,  as  well  as  associated  costs,  diversion  of  internal  resources,  and  reputational  harm.
Additionally, from 1 January 2021, we are subject to the GDPR and also the United Kingdom GDPR, which, together with
the  amended  United  Kingdom  Data  Protection  Act  2018,  retains  the  GDPR  in  United  Kingdom  national  law  following
Brexit. The United Kingdom GDPR mirrors the fines under the GDPR, e.g. fines up to the greater of €20 million (£17.5
million) or 4% of global turnover. The relationship between the United Kingdom and the European Union in relation to
certain aspects of data protection law remains unclear, and it is unclear how United Kingdom data

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protection laws and regulations will develop in the medium to longer term. These changes will lead to additional costs and
increase our overall risk exposure.

The  GDPR,  together  with  the  national  legislation  of  the  EU,  EEA  member  states  and  the  United  Kingdom
governing the processing of personal data, impose strict obligations and restrictions on the ability to collect, analyze and
transfer personal data, including health data from clinical trials and AE reporting. In particular, these obligations include
restrictions concerning the consent of the individuals to whom the personal data relates, the information provided to the
individuals, the transfer of personal data out of the EU, the EEA and the United Kingdom, security breach notifications,
security  and  confidentiality  of  the  personal  data,  and  imposition  of  substantial  potential  fines  for  breaches  of  the  data
protection obligations. Data protection authorities from the different EU and EEA member states may interpret the GDPR
and national laws differently and impose additional requirements, which add to the complexity of processing personal data
in the EU and the EEA. Guidance on implementation and compliance practices are often updated or otherwise revised.

With respect to the transfer of personal data out of the EU and the United Kingdom, the GDPR and the United
Kingdom  GDPR  provides  that  the  transfer  of  personal  data  to  countries  that  are  not  considered  by  the  European
Commission to provide an adequate level of data protection, including the United States, is permitted only on the basis of
complying with specific legal steps, a number of which are subject to legal challenges. Most recently, on July 16, 2020, the
Court  of  Justice  of  the  European  Union  (“CJEU”)  invalidated  the  EU-US  Privacy  Shield  Framework  (“Privacy  Shield”)
under which personal data could be transferred from the EEA to US entities who had self-certified under the Privacy Shield
scheme. These recent developments may require us to review and amend the legal mechanisms by which we make and/or
receive  personal  data  transfers  to/in  the  U.S.   As  supervisory  authorities  issue  further  guidance  on  personal  data  export
mechanisms,  including  circumstances  where  the  standard  contractual  clauses  cannot  be  used,  and/or  start  taking
enforcement action, we could suffer additional costs, complaints and/or regulatory investigations or fines, and/or if we are
otherwise unable to transfer personal data between and among countries and regions in which we operate, it could affect
the  manner  in  which  we  provide  our  services,  the  geographical  location  or  segregation  of  our  relevant  systems  and
operations,  and  could  adversely  affect  our  financial  results.  In  addition,  the  United  Kingdom’s  withdrawal  from  the
European Union means that the United Kingdom will become a “third country” for the purposes of data transfers from the
European  Union  to  the  United  Kingdom  following  the  expiration  of  the  four  to  six-month  personal  data  transfer  grace
period (from 1 January 2021) set out in the EU and United Kingdom Trade and Cooperation Agreement, unless a relevant
adequacy  decision  is  adopted  in  favor  of  the  United  Kingdom  (which  would  allow  data  transfers  without  additional
measures). These changes may require us to find alternative solutions for the compliant transfer of personal data into the
United Kingdom.

Our failure to comply with these laws, or changes in the way in which these laws are implemented, could lead to

government enforcement actions and significant penalties against us, and adversely impact our operating results. In
particular, our failure to comply with our obligations under the GDPR, including any failure to adopt measures to ensure
that we can continue to conduct the data processing activities that we initiated in the EU before the GDPR entered into
application could adversely impact our ability to use the  data generated in our studies.

Our future growth depends, in part, on our ability to penetrate foreign markets, where we will be subject to additional
regulatory burdens and other risks and uncertainties.

Our future profitability will depend, in part, on our ability to commercialize setmelanotide in foreign markets for
which we intend to rely on collaborations with third parties. If we commercialize setmelanotide in foreign markets, we will
be subject to additional risks and uncertainties, including:

● our customers’ ability to obtain reimbursement for setmelanotide in foreign markets;

● our inability to directly control commercial activities because we are relying on third parties;

● the  burden  of  complying  with  complex  and  changing  foreign  regulatory,  tax,  accounting  and  legal

requirements;

● different medical practices and customs in foreign countries affecting acceptance in the marketplace;

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● import or export licensing requirements;

● longer accounts receivable collection times;

● longer lead times for shipping;

● language barriers for technical training;

● reduced protection of intellectual property rights in some foreign countries;

● foreign currency exchange rate fluctuations; and

● the interpretation of contractual provisions governed by foreign laws in the event of a contract dispute.

Foreign  sales  of  setmelanotide  could  also  be  adversely  affected  by  the  imposition  of  governmental  controls,

political and economic instability, trade restrictions and changes in tariffs.

Laws  and  regulations  governing  any  international  operations  we  may  have  in  the  future  may  preclude  us  from
developing,  manufacturing  and  selling  setmelanotide  outside  of  the  United  States  and  require  us  to  develop  and
implement costly compliance programs.

If we expand our operations outside of the United States, we must dedicate additional resources to comply with
numerous  laws  and  regulations  in  each  jurisdiction  in  which  we  plan  to  operate.  The  Foreign  Corrupt  Practices  Act  of
1977,  or  the  FCPA,  prohibits  any  U.S.  individual  or  business  from  paying,  offering,  authorizing  payment  or  offering
anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose of influencing
any act or decision of such third party in order to assist the individual or business in obtaining or retaining business. The
FCPA  also  obligates  companies  whose  securities  are  listed  in  the  United  States  to  comply  with  certain  accounting
provisions  requiring  the  company  to  maintain  books  and  records  that  accurately  and  fairly  reflect  all  transactions  of  the
company,  including  international  subsidiaries,  and  to  devise  and  maintain  an  adequate  system  of  internal  accounting
controls for international operations.

Compliance with the FCPA is expensive and difficult, particularly in countries in which corruption is a recognized
problem. In addition, the FCPA presents particular challenges in the pharmaceutical industry, because, in many countries,
hospitals  are  operated  by  the  government,  and  doctors  and  other  hospital  employees  are  considered  foreign  officials.
Certain payments to hospitals in connection with clinical trials and other work have been deemed to be improper payments
to government officials and have led to FCPA enforcement actions.

Various laws, regulations and executive orders also restrict the use and dissemination outside of the United States,
or the sharing with certain non-U.S. nationals, of information classified for national security purposes, as well as certain
products  and  technical  data  relating  to  those  products.  If  we  expand  our  presence  outside  of  the  United  States,  it  will
require us to dedicate additional resources to comply with these laws, and these laws may preclude us from developing,
manufacturing or selling certain product candidates and products outside of the United States, which could limit our growth
potential and increase our development costs.

The  failure  to  comply  with  laws  governing  international  business  practices  may  result  in  substantial  civil  and
criminal penalties and suspension or debarment from government contracting. The Securities and Exchange Commission,
or SEC, also may suspend or bar issuers from trading securities on U.S. exchanges for violations of the FCPA’s accounting
provisions.

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The  results  of  the  United  Kingdom’s  referendum  on  withdrawal  from  the  EU  may  have  a  negative  effect  on  global
economic conditions, financial markets and our business.

Following  a  national  referendum  and  enactment  of  legislation  by  the  government  of  the  United  Kingdom,  the
United Kingdom formally withdrew from the EU on January 31, 2020 (commonly referred to as “Brexit”) and entered into
a  transition  period  which  ended  on  December  31,  2020.  Since  the  expiry  of  the  transition  period,  the  United  Kingdom
operates  under  a  distinct  regulatory  regime.  EU  pharmaceutical  laws  only  apply  to  the  United  Kingdom  in  respect  of
 Northern Ireland (as laid out in the Protocol on Ireland and Northern Ireland). Since January 1, 2021, the EU laws which
have been transposed into UK law through secondary legislation continue to be applicable as “retained EU law”. As there
is no general power to amend these regulations, the UK government has introduced a new Medicines and Medical Devices
Bill which seeks to address  regulatory gaps through  implementing regulations and delegated powers covering the fields of
human medicines, clinical trials of human medicines, veterinary medicines and medical devices. The purpose of the bill is
to enable the existing UK regulatory frameworks to be updated. Although regulatory authorities in the UK have indicated
in  the  bill  that  new  UK  rules  will  closely  align  with  EU  laws,  detailed  proposals  are  yet  to  be  published.    Significant
political and economic uncertainty therefore remains about how much the relationship between the United Kingdom and
EU will differ as a result of the United Kingdom’s withdrawal.

On  December  24,  2020,  the  United  Kingdom  and  the  EU  announced  that  they  had  agreed  to  the  terms  of  their
future  trading  relationship  in  the  EU—United  Kingdom  Trade  and  Cooperation  Agreement  (“TCA”),  which  has  been
provisionally  applicable  since  January  1,  2021,  but  which  awaits  the  final  agreement  of  the  remaining  27  EU  member
states. While agreement on the terms of the TCA has avoided a “ no deal” Brexit scenario, and provides in principle for
quota-  and  tariff-free  trading  of  goods,  it  is  nevertheless  expected  that  the  TCA  will  result  in  the  creation  of  non-tariff
barriers  (such  as  increased  shipping  and  regulatory  costs  and  complexities)  to  the  trade  in  goods  between  the  United
Kingdom and the EU. Further, the TCA does not provide for the continued free movement of services between the United
Kingdom and the EU and imposes additional restrictions on the free movement of people between the United Kingdom and
the  EU.  The  TCA  includes  provisions  affecting  pharmaceutical  companies  such  as  customs  and  tariffs  in  relation  to
healthcare  products  and  provides  for  the  mutual  recognition  of  Good  Manufacturing  Practice  (GMP)  inspections  of
manufacturing facilities for medicinal products and GMP documents issued. It is important to note however that significant
regulatory  gaps  still  exist  and  the  TCA  does  not  contain  wholesale  mutual  recognition  of  United  Kingdom  and  EU
pharmaceutical regulations and product standards, for example in relation to batch testing and pharmacovigilance, which
remain subject to further bilateral discussions.

The United Kingdom’s withdrawal from the EU and the associated uncertainty has had and may continue to have
a  significant  adverse  effect  on  global  economic  conditions  and  the  stability  of  global  financial  markets,  and  could
significantly reduce global market liquidity and restrict the ability of key market participants to operate in certain financial
markets.  Asset  valuations,  currency  exchange  rates  and  credit  ratings  may  be  especially  subject  to  increased  market
volatility.  Any  of  these  factors  could  have  a  significant  adverse  effect  on  our  business,  financial  condition,  results  of
operations and prospects.

Further, the United Kingdom’s withdrawal from the EU has resulted in the relocation of the EMA from the United
Kingdom to the Netherlands. This relocation has caused, and may continue to cause, disruption in the administrative and
medical  scientific  links  between  the  EMA  and  the  United  Kingdom  Medicines  and  Healthcare  products  Regulatory
Agency, including delays in granting clinical trial authorization or marketing authorization, disruption of importation and
export of active substance and other components of new drug formulations, and disruption of the supply chain for clinical
trial product and final authorized formulations. The cumulative effects of the disruption to the regulatory framework may
add  considerably  to  the  development  lead  time  to  marketing  authorization  and  commercialization  of  products  in  the  EU
and/or the United Kingdom.

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Risks Related to Employee Matters and Managing Growth

Our  future  success  depends  on  our  ability  to  retain  our  key  employees  and  consultants,  and  to  attract,  retain  and
motivate qualified personnel.

We  are  highly  dependent  on  our  executive  leadership  team.    We  have  employment  agreements  with  these
individuals but any individual may terminate his or her employment with us at any time. The loss of their services might
impede  the  achievement  of  our  research,  development  and  commercialization  objectives.  We  also  do  not  have  any  key-
person life insurance on any of these key employees. We rely on consultants and advisors, including scientific and clinical
advisors, to assist us in formulating our development and commercialization strategy. Our consultants and advisors 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 and may not be subject to non-compete agreements. Recruiting and retaining
qualified scientific personnel 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 for similar personnel. We also experience competition for the hiring of scientific personnel from
universities and research institutions. Failure to succeed in clinical trials may make it more challenging to recruit and retain
qualified scientific personnel.

We will need to develop and expand our company, and we may encounter difficulties in managing this development and
expansion, which could disrupt our operations.

We expect to increase our number of employees and the scope of our operations. In particular, we will need to
transition from a research and development company to a commercial company. To manage our anticipated development
and expansion, we must continue to implement and improve our managerial, operational and financial systems, expand our
facilities  and  continue  to  recruit  and  train  additional  qualified  personnel.  Also,  our  management  may  need  to  divert  a
disproportionate amount of its attention away from their day-to-day activities and devote a substantial amount of time to
managing  these  development  activities.  Due  to  our  limited  resources,  we  may  not  be  able  to  effectively  manage  the
expansion  of  our  operations  or  recruit  and  train  additional  qualified  personnel.  This  may  result  in  weaknesses  in  our
infrastructure, and give rise to operational mistakes, loss of business and commercial opportunities, loss of employees and
reduced  productivity  among  remaining  employees.  If  our  management  is  unable  to  effectively  manage  our  expected
development and expansion, our expenses may increase more than expected, our ability to generate or increase our revenue
could be reduced and we may not be able to implement our business strategy.

The physical expansion of our operations may lead to significant costs and may divert financial resources from
other  projects,  such  as  the  development  of  setmelanotide.  Many  of  our  suppliers  and  collaborative  and  clinical  trial
relationships are located outside the United States, and we may in the future seek to hire employees located outside of the
United States. Accordingly, our business may become subject to economic, political, regulatory and other risks associated
with international operations, such as compliance with tax, employment, immigration and labor laws for employees living
or traveling abroad, workforce uncertainty in countries where labor unrest is more common than in the United States, as
well as difficulties associated with staffing and managing international operations, including differing labor relations. Any
of  these  factors  could  materially  affect  our  business,  financial  condition  and  results  of  operations.  Our  future  financial
performance and our ability to commercialize setmelanotide, if approved, and compete effectively will depend, in part, on
our ability to effectively manage the future development and expansion of our company.

Our internal computer systems, or those of our third-party CROs, CMOs or other contractors or consultants, may fail or
suffer security breaches, which could result in a material disruption of setmelanotide development programs, regulatory
investigations, enforcement actions and lawsuits.

In  the  ordinary  course  of  our  business,  we  collect  and  store  sensitive  data,  including  intellectual  property,  our
proprietary  business  information  and  that  of  our  suppliers,  as  well  as  personally  identifiable  information  of  employees.
Similarly,  our  third-party  CROs,  CMOs  and  other  contractors  and  consultants  possess  certain  of  our  sensitive  data.  The
secure maintenance of this information is material to our operations and business strategy. Despite the implementation of
security  measures,  our  internal  computer  systems  and  those  of  our  third-party  CROs,  CMOs  and  other  contractors  and
consultants are vulnerable to attacks by hackers, damage from computer viruses, unauthorized access, breach due to

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employee error, malfeasance or other disruptions, natural disasters, terrorism and telecommunication and electrical failures.
Any such attack, incident or breach could compromise our networks and the information stored there could be accessed,
publicly disclosed, lost, corrupted or stolen. Further, attacks upon information technology systems are increasing in their
frequency,  levels  of  persistence,  sophistication  and  intensity,  and  are  being  conducted  by  sophisticated  and  organized
groups and individuals with a wide range of motives and expertise. As a result of the COVID-19 pandemic, we may also
face  increased  cybersecurity  risks  due  to  our  reliance  on  internet  technology  and  the  number  of  our  employees  who  are
working  remotely,  which  may  create  additional  opportunities  for  cybercriminals  to  exploit  vulnerabilities.  Furthermore,
because the techniques used to obtain unauthorized access to, or to sabotage, systems change frequently and often are not
recognized  until  launched  against  a  target,  we  may  be  unable  to  anticipate  these  techniques  or  implement  adequate
preventative measures. We may also experience security breaches that may remain undetected for an extended period. The
legislative and regulatory landscape for privacy and data protection continues to evolve, and there has been an increasing
amount of focus on privacy and data protection issues with the potential to affect our business, including recently enacted
laws in a majority of states requiring security breach notification, some also require implementation of reasonable security
measures and provide a private right of action in the event of a breach.  Costs of breach response, mitigation, investigation,
remediation,  notice  and  ongoing  assessments  can  be  considerable.  Thus,  any  access,  disclosure,  damage  or  other  loss  of
information,  including  our  data  being  breached  at  our  partners  or  third-party  providers,  could  result  in  legal  claims  or
proceedings and liability under state, federal and international privacy laws, disruption of our operations, and damage to
our reputation, which could adversely affect our business.

If such an event were to occur and cause interruptions in our operations, it could result in a material disruption of
our  programs.  For  example,  the  loss  of  clinical  trial  data  for  setmelanotide  or  other  product  candidates  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 results in a loss of or damage to our data or applications or other data or applications
relating to our technology or product candidates, or inappropriate disclosure of confidential or proprietary information, we
could incur liabilities and the further development of setmelanotide and our product candidates could be delayed.

Risks Related to Our Common Stock

Our directors and executive officers and their affiliated entities own a significant percentage of our stock and, if they
choose to act together, will be able to exert significant influence over matters subject to stockholder approval.

Our  executive  officers  and  directors  and  their  respective  affiliates,  in  the  aggregate,  hold  shares  representing
approximately 15.7% of our outstanding voting stock as of December 31, 2020.  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  stockholders  could  significantly  influence  elections  of
directors,  any  amendments  of  our  organizational  documents,  or  approval  of  any  merger,  sale  of  assets,  or  other  major
corporate transaction. This may prevent or discourage unsolicited acquisition proposals or offers for our common stock that
you may feel are in your best interest as one of our stockholders.

Anti-takeover provisions in our charter documents and under Delaware law could make an acquisition of us, even one
that may be beneficial to our stockholders, more difficult and may prevent attempts by our stockholders to replace or
remove our current management.

We are a Delaware corporation. Provisions in our amended and restated certificate of incorporation and amended
and restated bylaws may delay or prevent an acquisition of us or a change in our management. In addition, because we are
incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law,
which limits the ability of stockholders owning in excess of 15% of our outstanding voting stock to merge or combine with
us.  Although  we  believe  these  provisions  collectively  will  provide  for  an  opportunity  to  obtain  greater  value  for
stockholders  by  requiring  potential  acquirers  to  negotiate  with  our  board  of  directors,  they  would  apply  even  if  an  offer
rejected  by  our  board  were  considered  beneficial  by  some  stockholders.  In  addition,  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,  which  is  responsible  for  appointing  the  members  of  our
management. Any provision in our amended and restated certificate of incorporation and amended and restated bylaws or
Delaware  law  that  has  the  effect  of  delaying  or  deterring  a  change  in  control  could  limit  the  opportunity  for  our
stockholders

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to receive a premium for their shares of our common stock, and could also affect the price that some investors are willing
to pay for our common stock.

Market volatility may affect our stock price and the value of your investment.

The market price for our common stock has been volatile and may continue to fluctuate significantly in response

to a number of factors, most of which we cannot control, including, among others:

● plans for, progress of, or results from preclinical studies and clinical trials of setmelanotide;

● the failure of the FDA to approve IMCIVREE for additional indications or EMA to approve setmelanotide;

● announcements of new products, technologies, commercial relationships, acquisitions or other events by us

or our competitors;

● the success or failure of other weight loss therapies and companies targeting rare diseases and orphan drug

treatment;

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

● failure of setmelanotide, if approved, to achieve commercial success;

● fluctuations in stock market prices and trading volumes of similar companies;

● general market conditions and overall fluctuations in U.S. equity markets;

● variations in our quarterly operating results;

● changes in our financial guidance or securities analysts’ estimates of our financial performance;

● changes in accounting principles;

● our ability to raise additional capital and the terms on which we can raise it;

● sales of large blocks of our common stock, including sales by our executive officers, directors and significant

stockholders;

● additions or departures of key personnel;

● discussion of us or our stock price by the press and by online investor communities; and

● other risks and uncertainties described in these risk factors.

Our quarterly operating results may fluctuate significantly.

We expect our operating results to be subject to quarterly fluctuations. Our net loss and other operating results will

be affected by numerous factors, including:

● variations in the level of expenses related to our development programs;

● addition or termination of clinical trials;

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● any intellectual property infringement lawsuit in which we may become involved;

● regulatory developments affecting setmelanotide;

● our execution of any collaborative, licensing or similar arrangements, and the timing of payments we may

make or receive under these arrangements;

● the achievement and timing of milestone payments under our existing collaboration and license agreements;

and

● if setmelanotide receives regulatory approval, the level of underlying demand for that product and customers’

buying patterns.

If  our  quarterly  operating  results  fall  below  the  expectations  of  investors  or  securities  analysts,  the  price  of  our
common  stock  could  decline  substantially.  Furthermore,  any  quarterly  fluctuations  in  our  operating  results  may,  in  turn,
cause the price of our stock to fluctuate substantially.

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

Under the Code, a corporation is generally allowed a deduction for net operating losses, or NOLs, carried over
from a prior taxable year, and can use such NOLs  to offset future taxable income, if any, until such losses are used or, for
NOLs  arising  in  taxable  years  ending  on  or  before  December  31,  2017,  until  such  NOLs  expire.  Other  unused  tax
attributes,  such  as  research  tax  credits  may  also  be  carried  forward  to  offset  future  taxable  income,  if  any,  until  such
attributes  are  used  or  expire.    As  of  December  31,  2020,  we  had  approximately  $382.3  million  and  $351.2  million  of
unused  federal  and  state  NOL  carryforwards,  respectively,  and  approximately  $8.1  million  and  $2.8  million  of  unused
federal and state carryforwards of research tax credits, respectively.  Of the federal NOL carryforwards at December 31,
2020, $309.1 million can be carried forward indefinitely, while $73.2 million will begin to expire in 2033.  Additionally, as
of December 31, 2020, we had federal orphan drug credits related to qualifying research of $10.1 million.

If a corporation undergoes an “ownership change,” very generally defined as a greater than 50% change by value
in its equity ownership by certain shareholders or groups of shareholders over a rolling three-year period, Sections 382 and
383  of  the  Code  limit  the  corporation’s  ability  to  use  carryovers  of  its  pre-change  NOLs,  credits  and  certain  other  tax
attributes to reduce its tax liability for periods after the ownership change. Our issuance of common stock pursuant to prior
public offerings may have resulted in a limitation under Code Sections 382 and 383, either separately or in combination
with certain prior or subsequent shifts in the ownership of our common stock. Future changes in our stock ownership, some
of which are outside of our control, could also result in an ownership change under Sections 382 and 383 of the Code. In
addition, for taxable years beginning after December 31, 2020, utilization of federal NOLs generated in tax years beginning
after December 31, 2017 are limited to a maximum of 80% of the taxable income for such year, after taking into account
utilization  of  NOLs  generated  in  years  beginning  before  January  1,  2018  and  determined  without  regard  to  such  NOL
deduction.  Further  regulatory  changes  could  also  limited  our  ability  to  utilize  our  NOLs.  As  a  result,  our  ability  to  use
carryovers of NOLs and credits to reduce our future U.S. federal income tax liability may be subject to limitations. This
could  result  in  increased  U.S.  federal  income  tax  liability  for  us  if  we  generate  taxable  income  in  a  future  period.
Limitations on the use of NOLs and other tax attributes could also increase our state tax liability. Any such limitation could
have a material adverse effect on our results of operations in future years. We have not completed a study to assess whether
an  ownership  change  for  purposes  of  Section  382  or  383  has  occurred,  or  whether  there  have  been  multiple  ownership
changes since our inception, due to the significant costs and complexities associated with such study.

The use of our tax attributes will also be limited to the extent that we do not generate positive taxable income in
future tax periods. We do not expect to generate positive taxable income in the near future and we may never achieve tax
profitability.

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Substantial future sales or perceived potential sales of our common stock in the public market could cause the price of
our common stock to decline significantly.

Sales of our common stock in the public market, or the perception that these sales could occur, could cause the
market  price  of  our  common  stock  to  decline  significantly.  As  of  December  31,  2020,  we  had  44,235,903  shares  of
common stock outstanding.

The holders of an aggregate of approximately 6.9 million shares of our common stock, or approximately 16% of
our total outstanding common stock as of December 31, 2020, are entitled to rights with respect to the registration of their
shares under the Securities Act, subject to specified conditions, until such shares can otherwise be sold without restriction
under Rule 144 or until the rights terminate pursuant to the terms of the investors’ rights agreement between us and such
holders. We have also registered and intend to continue to register all shares of common stock that we may issue under our
equity  compensation  plans.  Once  we  register  these  shares  under  the  Securities  Act,  the  shares  become  freely  tradable
without  restriction  under  the  Securities  Act,  except  for  shares  purchased  by  affiliates.  Any  sales  of  securities  by  these
stockholders could have a material adverse effect on the trading price of our common stock.

In  addition,  we,  our  executive  officers,  our  directors  and  certain  shareholders  affiliated  with  our  directors  have
agreed that, subject to certain exceptions, during the period ending 90 days in the case of us and our executive officers and
30 days in the case of our directors and their affiliated shareholders, after the date of the prospectus supplement filed in
connection with our February 2021 public offering, we and they will not offer, sell, contract to sell, pledge or otherwise
dispose of, directly or indirectly, any of our common stock or securities convertible into or exchangeable or exercisable for
any  of  our  common  stock,  enter  into  a  transaction  that  would  have  the  same  effect,  or  enter  into  any  swap  or  other
arrangement  that  transfers,  in  whole  or  in  part,  any  of  the  economic  consequences  of  ownership  of  our  common  stock,
whether  any  of  these  transactions  are  to  be  settled  by  delivery  of  our  common  stock  or  other  securities,  in  cash  or
otherwise, or publicly disclose the intention to make any offer, sale, pledge or disposition, or to enter into any transaction,
swap, hedge or other arrangement, without, in each case, the prior written consent of Morgan Stanley & Co. LLC, BofA
Securities, Inc. and Cowen and Company, LLC, who may release any of the securities subject to these lock-up agreements
at any time without notice.

We  are  no  longer  an  “emerging  growth  company”  and,  as  a  result,  are  subject  to  certain  enhanced  disclosure
requirements.

Because  the  market  value  of  our  common  stock  held  by  non-affiliates  exceeded  $700.0  million  as  of  June  30,
2020, among other things, we no longer qualified as an emerging growth company as of December 31, 2020. As a result,
commencing  January  1,  2021,  we  are  subject  to  certain  requirements  that  apply  to  other  public  companies  but  did  not
previously apply to us due to our status as an emerging growth company, such as the auditor attestation requirements under
Section 404 of the Sarbanes Oxley Act of 2002, as amended. Compliance with these enhanced disclosure requirements will
increase our costs and could negatively affect our results of operations and financial condition.

We may be at an increased risk of securities class action litigation.

Historically, securities class action litigation has often been brought against a company following a decline in the
market price of its securities. This risk is especially relevant for us because biotechnology and pharmaceutical companies
have experienced significant stock price volatility in recent years. If we were to be sued, it could result in substantial costs
and a diversion of management’s attention and resources, which could harm our business.

We  do  not  intend  to  pay  dividends  on  our  common  stock  and,  consequently,  your  ability  to  achieve  a  return  on  your
investment will depend on appreciation in the price of our common stock.

We have never declared or paid any cash dividends on our common stock and do not currently intend to do so in
the  foreseeable  future.  We  currently  anticipate  that  we  will  retain  future  earnings  for  the  development,  operation  and
expansion of our business and do not anticipate declaring or paying any cash dividends in the foreseeable future. Therefore,
the success of an investment in shares of our common stock will depend upon any future appreciation in their value. There

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is no guarantee that shares of our common stock will appreciate in value or even maintain the price at which you purchased
them.

Provisions in our certificate of incorporation and bylaws and Delaware law might discourage, delay or prevent a change
in  control  of  our  company  or  changes  in  our  management  and,  therefore,  depress  the  market  price  of  our  common
stock.

Our certificate of incorporation and bylaws contain provisions that could depress the market price of our common
stock by acting to discourage, delay or prevent a change in control of our company or changes in our management that the
stockholders of our company may deem advantageous. These provisions, among other things:

● establish a classified board of directors so that not all members of our board are elected at one time;

● permit only the board of directors to establish the number of directors and fill vacancies on the board;

● provide  that  directors  may  only  be  removed  “for  cause”  and  only  with  the  approval  of  two-thirds  of  our

stockholders;

● authorize the issuance of “blank check” preferred stock that our board could use to implement a stockholder

rights plan (also known as a “poison pill”);

● eliminate the ability of our stockholders to call special meetings of stockholders;

● prohibit stockholder action by written consent, which requires all stockholder actions to be taken at a meeting

of our stockholders;

● prohibit cumulative voting;

● authorize our board of directors to amend the bylaws;

● establish advance notice requirements for nominations for election to our board or for proposing matters that

can be acted upon by stockholders at annual stockholder meetings; and

● require a super-majority vote of stockholders to amend some provisions described above.

In  addition,  Section  203  of  the  General  Corporation  Law  of  the  State  of  Delaware,  or  the  DGCL,  prohibits  a
publicly-held Delaware corporation from engaging in a business combination with an interested stockholder, generally a
person  which  together  with  its  affiliates  owns,  or  within  the  last  three  years  has  owned,  15%  of  our  voting  stock,  for  a
period  of  three  years  after  the  date  of  the  transaction  in  which  the  person  became  an  interested  stockholder,  unless  the
business combination is approved in a prescribed manner.

Any  provision  of  our  certificate  of  incorporation,  bylaws  or  Delaware  law  that  has  the  effect  of  delaying  or
preventing a change in control could limit the opportunity for our stockholders to receive a premium for their shares of our
capital stock and could also affect the price that some investors are willing to pay for our common stock.

Our certificate of incorporation provides that the Court of Chancery of the State of Delaware is the exclusive forum for
substantially  all  disputes  between  us  and  our  stockholders and  our  bylaws  designate  the  federal  district  courts  of  the
United States as the exclusive forum for actions arising under the Securities Act, which could limit our stockholders’
ability to obtain a favorable judicial forum for disputes with us or our directors, officers or employees.

Our  certificate  of  incorporation  provides  that  the  Court  of  Chancery  of  the  State  of  Delaware  is  the  exclusive
forum  for:  (i)  any  derivative  action  or  proceeding  brought  on  our  behalf;  (ii)  any  action  asserting  a  claim  of  breach  of
fiduciary duty; (iii) any action asserting a claim against us arising under the DGCL, our certificate of incorporation or our

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bylaws; and (iv) any action asserting a claim against us that is governed by the internal affairs doctrine. In addition, our
bylaws provide that the federal district courts of the United States are the exclusive forum for any complaint raising a cause
of action arising under the Securities Act. Any person or entity purchasing or otherwise acquiring any interest in any of our
securities shall be deemed to have notice of and consented to the provisions of our certificate of incorporation and bylaws
described above. These exclusive-forum provisions may limit a stockholder’s ability to bring a claim in a judicial forum
that  it  finds  favorable  for  disputes  with  us  or  our  directors,  officers  or  other  employees,  which  may  discourage  lawsuits
against  us  and  our  directors,  officers  and  other  employees.  If  a  court  were  to  find  these  provisions  of  our  certificate  of
incorporation  or  bylaws  to  be  inapplicable  or  unenforceable  in  an  action,  we  may  incur  additional  costs  associated  with
resolving the dispute in other jurisdictions, which could seriously harm our business.

General Risk Factors

We may acquire businesses or products, form strategic alliances or create joint ventures in the future, and we may not
realize their benefits.

We  may  acquire  additional  businesses  or  products,  form  strategic  alliances  or  create  joint  ventures  with  third
parties that we believe will complement or augment our existing business. If we acquire businesses with promising markets
or  technologies,  we  may  not  be  able  to  realize  the  benefit  of  acquiring  such  businesses  if  we  are  unable  to  successfully
integrate them with our existing operations and company culture. We may encounter numerous difficulties in developing,
manufacturing and marketing any new products resulting from a strategic alliance, joint venture or acquisition that delay or
prevent us from realizing their expected benefits or enhancing our business. We cannot assure you that, following any such
acquisition, we will achieve the expected synergies to justify the transaction.

An active market for our common stock may not be maintained.

Our stock began trading on the Nasdaq Global Market in October 2017 and we can provide no assurance that we
will be able to continue to maintain an active trading market on the Nasdaq Global Market or any other exchange in the
future. If an active market for our common stock is not maintained, it may be difficult for our stockholders to sell shares
without depressing the market price for the shares or at all. An inactive market may also impair our ability to raise capital
by selling shares and may impair our ability to acquire other businesses, applications or technologies using our shares as
consideration.

If  securities  or  industry  analysts  do  not  continue  to  publish  research  or  reports  or  publish  unfavorable  research  or
reports about our business, our stock price and trading volume could decline.

The trading market for our common stock depends in part on the research and reports that securities or industry
analysts  publish  about  us,  our  business,  our  market  or  our  competitors.  We  do  not  control  these  analysts.  If  we  lose
securities or industry analysts coverage of our company, the trading price for our stock would be negatively impacted. If
one or more of the analysts who covers us downgrades our stock, our stock price would likely decline. If one or more of
these analysts issues unfavorable commentary or ceases to cover us or fails to regularly publish reports on us, interest in
our stock could decrease, which could cause our stock price or trading volume to decline.

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

We  may  seek  additional  capital  through  a  combination  of  private  and  public  equity  offerings,  debt  financings,
collaborations and strategic and licensing arrangements. To the extent that we raise additional capital through the sale of
common  stock  or  securities  convertible  or  exchangeable  into  common  stock,  a  stockholder’s  ownership  interest  in  our
company  will  be  diluted.  In  addition,  the  terms  of  any  such  securities  may  include  liquidation  or  other  preferences  that
materially adversely affect the rights of our stockholders. Debt financing, if available, would increase our fixed payment
obligations and 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 additional funds through
collaboration, strategic partnerships and licensing arrangements with third parties, we may have to relinquish valuable

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rights to setmelanotide, our intellectual property or future revenue streams, or grant licenses on terms that are not favorable
to us.

Unfavorable  global  economic  conditions  could  adversely  affect  our  business,  financial  condition  or  results  of
operations.

Our  results  of  operations  could  be  adversely  affected  by  general  conditions  in  the  global  economy  and  in  the
global  financial  markets.  The  global  financial  crisis  caused  extreme  volatility  and  disruptions  in  the  capital  and  credit
markets. A severe or prolonged economic downturn, such as the global financial crisis, could result in a variety of risks to
our  business,  including  weakened  demand  for  setmelanotide  and  our  ability  to  raise  additional  capital  when  needed  on
acceptable  terms,  if  at  all.  A  weak  or  declining  economy  could  also  strain  our  suppliers,  possibly  resulting  in  supply
disruption,  or  cause  our  customers  to  delay  making  payments  for  our  services.  Any  of  the  foregoing  could  harm  our
business and we cannot anticipate all of the ways in which the current economic climate and financial market conditions
could adversely impact our business.

We  have  incurred  and  will  continue  to  incur  substantial  costs  as  a  result  of  operating  as  a  public  company,  our
management will continue to devote substantial time to new compliance initiatives and corporation governance policies,
and  we  will  need  to  hire  additional  qualified  accounting  and  financial  personnel  with  appropriate  public  company
experience.

As a public company, and particularly now that we are no longer an emerging growth company, we have incurred
and will continue to incur significant legal, accounting and other expenses. The Sarbanes-Oxley Act of 2002, the Dodd-
Frank Wall Street Reform and Consumer Protection Act, the listing requirements of the Nasdaq Global 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. Our management and other
personnel will continue to devote a substantial amount of time to these compliance initiatives and we will need to continue
to hire additional accounting and financial personnel with appropriate public company experience and technical accounting
knowledge.  Even  if  we  are  able  to  hire  appropriate  personnel,  our  existing  operating  expenses  and  operations  will  be
impacted  by  the  direct  costs  of  their  employment  and  the  indirect  consequences  related  to  the  diversion  of  management
resources from product development efforts.  Moreover, these rules and regulations will continue to increase our legal and
financial compliance costs and make some activities more time-consuming and costly.

These  rules  and  regulations  are  often  subject  to  varying  interpretations,  in  many  cases  due  to  their  lack  of
specificity, and, as a result, their application in practice may evolve over time as new guidance is provided by regulatory
and governing bodies. This could result in future uncertainty regarding compliance matters and higher costs necessitated by
ongoing revisions to disclosure and governance practices.

If we fail to maintain an effective system of internal control over financial reporting, we may not be able to accurately
report our financial results or prevent fraud. As a result, stockholders could lose confidence in our financial and other
public reporting, which would harm our business and the trading price of our common stock.

Effective  internal  control  over  financial  reporting  is  necessary  for  us  to  provide  reliable  financial  reports  and,
together with adequate disclosure controls and procedures, is designed to prevent fraud. Any failure to implement required
new or improved controls, or difficulties encountered in their implementation could cause us to fail to meet our reporting
obligations.  In  addition,  any  testing  by  us  conducted  in  connection  with  Section  404,  or  any  testing  by  our  independent
registered public accounting firm, may reveal deficiencies in our internal control over financial reporting that are deemed
to  be  material  weaknesses  or  that  may  require  prospective  or  retroactive  changes  to  our  financial  statements  or  identify
other areas for further attention or improvement.

Pursuant  to  Section  404,  we  are  required  to  furnish  a  report  by  our  management  on  our  internal  control  over
financial  reporting.  To  continue  to  achieve  compliance  with  Section  404,  we  continue  to  be  engaged  in  a  process  to
document and evaluate our internal control over financial reporting, which is both costly and challenging. In this regard,
we will need to continue to dedicate internal resources, potentially engage outside consultants and adopt a detailed work
plan to assess and document the adequacy of internal control over financial reporting, continue steps to improve control

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processes as appropriate, validate through testing that controls are functioning as documented and implement a continuous
reporting and improvement process for internal control over financial reporting.  Despite our efforts, there is a risk that we
will not be able to conclude that our internal control over financial reporting is effective as required by Section 404.

In  addition,  because  we  no  longer  qualify  as  an  emerging  growth  company  as  of  December  31,  2020,  we  are
required to include an attestation report on internal control over financial reporting issued by our independent registered
public accounting firm. If we are unable to maintain effective internal control over financial reporting, we may not have
adequate, accurate or timely financial information, our independent registered public accounting firm may issue a report
that  is  adverse,  and  we  may  be  unable  to  meet  our  reporting  obligations  as  a  public  company  or  comply  with  the
requirements of the SEC or Section 404. This could result in a restatement of our financial statements, the imposition of
sanctions, including the inability of registered broker dealers to make a market in our common stock, or investigation by
regulatory authorities. Any such action or other negative results caused by our inability to meet our reporting requirements
or  comply  with  legal  and  regulatory  requirements  or  by  disclosure  of  an  accounting,  reporting  or  control  issue  could
adversely  affect  the  trading  price  of  our  securities  and  our  business.  Material  weaknesses  in  our  internal  control  over
financial reporting could also reduce our ability to obtain financing or could increase the cost of any financing we obtain.
This could result in an adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial
statements.

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

Our  corporate  headquarters  are  located  in  Boston,  Massachusetts,  where  we  lease  approximately  13,600  square
feet of office space pursuant to lease agreements expiring in May 2025, with a five-year renewal option to extend the lease.
This facility houses our research, clinical, regulatory, commercial and administrative personnel.  See Note 9 to our audited
consolidated financial statements included in this report for additional information about this lease.

We believe that our existing facilities are adequate for our near-term needs, but if we need additional space as we
grow  and  expand  our  operations.  We  believe  that  suitable  additional  or  alternative  office  space  would  be  available  as
required in the future on commercially reasonable terms.

Item 3. Legal Proceedings

We are not currently a party to any material legal proceedings.

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

Our  common  stock  has  been  listed  on  The  Nasdaq  Global  Market  under  the  symbol  “RYTM”  since  October  5,

2017. Prior to that date, there was no public trading market for our common stock.

Holders of Common Stock

As  of  February  19,  2021,  there  were  20  holders  of  record  of  our  common  stock.   This  number  does  not  reflect

beneficial owners whose shares are held in street name.

Securities Authorized for Issuance Under Equity Compensation Plans

Information regarding our equity compensation plans and the securities authorized for issuance thereunder is set

forth herein under Part III, Item 12 below.

Dividend Policy

We have never declared or paid any cash dividends on our common stock or any other securities. We anticipate
that we will retain all available funds and any future earnings, if any, for use in the operation of our business and do not
anticipate paying cash dividends in the foreseeable future. In addition, future debt instruments may materially restrict our
ability to pay dividends on our common stock. Payment of future cash dividends, if any, will be at the discretion of the
board of directors after taking into account various factors, including our financial condition, operating results, current and
anticipated  cash  needs,  the  requirements  of  current  or  then-existing  debt  instruments  and  other  factors  the  board  of
directors deems relevant.

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Performance Graph

This  graph  is  not  “soliciting  material,”  is  not  deemed  “filed”  with  the  SEC  and  is  not  to  be  incorporated  by
reference  into  any  filing  of  Rhythm  Pharmaceuticals,  Inc.  under  the  Securities  Act  or  the  Exchange  Act,  whether  made
before or after the date hereof and irrespective of any general incorporation language in any such filing.

The  following  graph  shows  the  total  stockholder  return  of  an  investment  of  $100  in  cash  at  market  close  on
October  5,  2017  (the  first  day  of  trading  of  our  common  stock)  through  December  31,  2020  for  (1)  our  common  stock,
(2)  the  Nasdaq  Composite  Index  (U.S.)  and  (3)  the  Nasdaq  Biotechnology  Index.  Pursuant  to  applicable  Securities  and
Exchange  Commission  rules,  all  values  assume  reinvestment  of  the  full  amount  of  all  dividends,  however  no  dividends
have  been  declared  on  our  common  stock  to  date.  The  stockholder  return  shown  on  the  graph  below  is  not  necessarily
indicative of future performance, and we do not make or endorse any predictions as to future stockholder returns.

Recent Sales of Unregistered Securities

None.  

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

None.

Item 6. Selected Financial Data

Not Applicable.

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  financial  statements  and  related  notes  appearing  elsewhere  in  this  Annual  Report.  In  addition  to  historical
information,  this  discussion  and  analysis  contains  forward-looking  statements  that  involve  risks,  uncertainties  and
assumptions. Our actual results may differ materially from those anticipated in these forward-looking statements as

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a  result  of  certain  factors.  We  discuss  factors  that  we  believe  could  cause  or  contribute  to  these  differences  below  and
elsewhere in this report, including those set forth under Item 1A. “Risk Factors” and under “Cautionary Note Regarding
Forward-Looking Statements” in this Annual Report.  Discussion and analysis of our 2019 fiscal year specifically, as well
as  the  year-over-year  comparison  of  our  2019  financial  performance  to  2018,  are  located  in  Part  II,  Item  7  -
Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form
10-K for the fiscal year ended December 31, 2019, filed with the SEC on March 2, 2020.

Overview

We  are  a  commercial-stage  biopharmaceutical  company  focused  on  changing  the  paradigm  for  the  treatment  of
rare  genetic  diseases  of  obesity,  which  are  characterized  by  early-onset,  severe  obesity  and  an  insatiable  hunger  or
hyperphagia.    Our  lead  product  candidate  is  IMCIVREE  (setmelanotide),  a  potent  melanocortin-4  receptor,  or  MC4R,
agonist  for  the  treatment  of  rare  genetic  diseases  of  obesity.  We  believe  IMCIVREE,  for  which  we  have  exclusive
worldwide  rights,  has  the  potential  to  restore  dysfunctional  MC4R  signaling  due  to  impaired  MC4R  pathway  function.
MC4R pathway deficiencies result in the disruption of satiety signals and energy homeostasis in the body, which, in turn,
leads  to  intense  feelings  of  hunger  and  to  obesity.  IMCIVREE  has  been  approved  by  the  U.S.  Food  and  Drug
Administration,  or  FDA,  for  chronic  weight  management  in  adult  and  pediatric  patients  six  years  of  age  and  older  with
obesity due to proopiomelanocortin, or POMC, proprotein convertase subtilisin/kexin type 1, or PCSK1, leptin receptor, or
LEPR, deficiency confirmed by genetic testing. We expect IMCIVREE to be commercially available in the first quarter of
2021.

Our  continued  development  efforts  are  focused  on  obesity  related  to  several  single  gene-related,  or  monogenic,
MC4R  pathway  deficiencies:  Bardet-Biedl  syndrome,  or  BBS;  Alström  syndrome;  POMC  or  LEPR  heterozygous
deficiency  obesity;  steroid  receptor  coactivator  1,  or  SRC1,  deficiency  obesity;  SH2B  adapter  protein  1,  or  SH2B1,
deficiency  obesity;  MC4R  deficiency  obesity  and  Smith-Magenis  syndrome,  as  well  as  additional  disorders  as  part  of
investigator-initiated protocols. There are currently no effective or approved treatments for these MC4R pathway-related
disorders.  We  believe  that  the  MC4R  pathway  is  a  compelling  target  for  treating  these  genetic  disorders  because  of  its
critical  role  in  regulating  appetite  and  weight  by  promoting  satiety  and  weight  control,  and  that  peptide  therapeutics  are
uniquely suited for activating this target.

We recently announced positive topline results from a pivotal Phase 3 clinical trial evaluating setmelanotide for
the  treatment  of  insatiable  hunger  and  severe  obesity  in  individuals  with  BBS  or  Alström  syndrome.  The  trial  met  its
primary and all key secondary endpoints, showing statistically significant and clinically meaningful reductions in weight
and  hunger  scores.  All  primary  endpoint  responders  were  patients  with  BBS.  There  were  three  evaluable  patients  with
Alström syndrome and none of them met the primary endpoint.  We are continuing to analyze the full data from patients
with  BBS  or  Alström  syndrome,  which  we  plan  to  present  at  a  medical  meeting  in  the  first  half  of  2021.  We  plan  to
complete  regulatory  submissions  to  both  the  FDA  and  the  EMA  for  BBS  in  the  second  half  of  2021,  and  we  expect  to
determine next steps for Alström syndrome upon completing a full analysis of the final data from the Phase 3 trial.  

The U.S. Food and Drug Administration, or the FDA, has acknowledged the importance of these results by giving
setmelanotide Breakthrough Therapy designation for the treatment of obesity associated with genetic defects upstream of
the  MC4R  in  the  leptin  melanocortin  pathways.  The  Breakthrough  Therapy  designation  currently  covers  indications  for
POMC deficiency obesity, LEPR deficiency obesity, BBS and Alström syndrome.

We  have  ongoing  Phase  2  clinical  trials,  referred  to  as  our  Basket  Study,  in  MC4R  pathway  heterozygous
deficiency obesity and POMC epigenetic disorders, which we expanded in the second half of 2019 to include the following
additional indications: SRC1 deficiency obesity, SH2B1 deficiency obesity, MC4R deficiency obesity and Smith-Magenis
syndrome. We reported preliminary results in MC4R pathway heterozygous deficiency obesity in March 2019.  On January
26, 2021, we announced new proof-of-concept interim data from our ongoing Phase 2 Basket Study across individuals with
one of three distinct rare genetic diseases of obesity: HET obesity due to a genetic variant in one of the two alleles of the
POMC,  PCSK1  or  LEPR  gene,  or  HETs;  obesity  due  to  SRC1  deficiency;  and  obesity  due  to  SH2B1  deficiency.  The
primary endpoint of the study is the percent of patients in each subgroup showing at least a 5 percent loss of body weight
over three months.  Consistent with prior clinical experience, setmelanotide was generally well tolerated in each of these
rare genetic diseases of obesity.  We are in discussions with the FDA to define a potential path for setmelanotide towards

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registration  for  these  indications.  Pending  the  outcome  of  these  discussions,  we  plan  to  initiate  a  pivotal  Phase  3  trial
evaluating  setmelanotide  in  patients  with  HET  obesity  and  SRC1  and  SH2B1 deficiency  obesities  in  the  second  half  of
2021.

We  recently  presented  new  data  generated  from  our  proprietary  gene  curation  and  selection  strategy,  which  is
designed to evaluate a gene’s relevance to the MC4R pathway with the goal of identifying genetic patient populations with
the potential to benefit from setmelanotide therapy. Using this proprietary approach, we identified an additional 31 MC4R
pathway genes with strong or very strong pathway relevance. Pending discussions with the FDA, we plan to initiate a new
exploratory MC4R pathway basket trial in patients with these 31 new genes in the second half of 2021.

In the first half of 2021, we plan to initiate a Phase 2 clinical trial in hypothalamic obesity, initiate a potentially
registration-enabling clinical trial of the weekly formulation of setmelanotide, and announce data from a Phase 2 basket
study  in  MC4R-recusable  patients.  In  the  second  half  of  2021,  we  plan  to  initiate  a  clinical  trial  of  setmelanotide  in
pediatric  patients  aged  two  to  six.   Also  in  the  second  half  of  2021,  we  expect  to  obtain  regulatory  approval  from  the
European  Commission  and  make  IMCIVREE  commercially  available  in  Europe  in  obesities  due  to  POMC,  PCSK1  and
LEPR deficiencies.

On January 5, 2021, we entered into an asset purchase agreement with Alexion Pharmaceuticals, Inc., or Alexion,
pursuant  to  which  we  agreed  to  sell  our  Rare  Pediatric  Disease  Priority  Review  Voucher,  PRV,  to  Alexion,  or  the  PRV
Transfer.  We  were  awarded  the  voucher  under  a  FDA  program  intended  to  encourage  the  development  of  certain  rare
pediatric disease product applications. We received the PRV when IMCIVREE was approved by the FDA. Pursuant to the
transfer agreement, Alexion agreed to pay us $100 million in cash upon the closing of the sale.  The PRV Transfer closed
on February 17, 2021.

On  February  9,  2021,  we  completed  an  underwritten  public  offering  in  which  we  sold  5,750,000  shares  of  our
common stock at a public offering price of $30.00 per share, which included the exercise in full by the underwriters of their
option to purchase up to 750,000 additional shares of common stock. We received aggregate net proceeds from the offering
of approximately $161.6 million after deducting underwriting discounts and commissions and offering expenses payable by
us.

Our  operations  to  date  have  been  limited  primarily  to  conducting  research  and  development  activities  for
setmelanotide. To date, we have not generated any product revenue and have financed our operations primarily through the
proceeds  received  from  the  sales  of  common  and  preferred  stock,  asset  sales,  as  well  as  capital  contributions  from
the  former  parent  company,  Rhythm  Holdings  LLC.  From  August  2015  through  August  2017,  we  raised  aggregate  net
proceeds of $80.8 million through our issuance of series A preferred stock.  Since our initial public offering, or IPO, on
October 10, 2017 and our underwritten follow-on offerings through February 2021, we have raised aggregate net proceeds
of  approximately  $611.4  million  through  the  issuance  of  our  common  stock  after  deducting  underwriting  discounts,
commissions and offering related transaction costs. Since inception, we have received a further $100.0 million from asset
sales, specifically in connection with the PRV Transfer. We will not generate revenue from product sales until we are able
to successfully establish a marketing and commercialization infrastructure for IMCIVREE. We expect to make IMCIVREE
commercially available to patients 6 years of age and older with obesity due to POMC, PCSK1 or LEPR deficiency in the
U.S. in the first quarter of 2021. We expect to continue to fund our operations through the sale of equity, debt financings or
other  sources.  We  intend  to  build  our  own  marketing  and  commercial  sales  infrastructure  and  we  may  enter  into
collaborations  with  other  parties  for  certain  markets  outside  the  United  States.  However,  we  may  be  unable  to  raise
additional funds or enter into such other arrangements when needed on favorable terms, or at all. If we fail to raise capital
or enter into such other arrangements as, and when, needed, we may have to significantly delay, scale back or discontinue
the development or commercialization of setmelanotide.

As of December 31, 2020 we had an accumulated deficit of $459.3 million. Our net losses were $134.0 million
and  $140.7  million,  for  the  years  ended  December  31,  2020  and  2019,  respectively.  We  expect  to  continue  to  incur
significant  expenses  and  increasing  operating  losses  over  the  foreseeable  future.  We  expect  our  expenses  will  increase
substantially in connection with our ongoing activities, as we:

● continue to conduct clinical trials for setmelanotide;

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● engage  contract  manufacturing  organizations,  or  CMOs,  for  the  manufacture  of  clinical  and  commercial-

grade setmelanotide;

● seek regulatory approval for setmelanotide for future indications;

● expand our clinical and financial operations and build a marketing and commercialization infrastructure; and

● continue to operate as a public company.

As  of  December  31,  2020,  our  cash  and  cash  equivalents  and  short-term  investments  were  approximately
$172.8  million.    We  expect  that  our  cash  and  cash  equivalents  and  short-term  investments  as  of  December  31,  2020,
together with the aggregate net proceeds from the February 2021 public offering and the proceeds from the PRV Transfer
of approximately $260.1 million, will enable us to fund our operating expenses through at least the second half of 2023.

Corporate Background

We  are  a  Delaware  corporation  organized  in  February  2013  under  the  name  Rhythm  Metabolic,  Inc.,  and  as  of

October 2015, under the name Rhythm Pharmaceuticals, Inc.

Impact of Novel Coronavirus

We are closely monitoring how the spread of COVID-19 is affecting our employees, business, preclinical studies
and  clinical  trials.  In  response  to  the  COVID-19  pandemic,  we  have  limited  access  to  our  executive  offices  with  most
employees  continuing  their  work  outside  of  our  offices  and  travel  has  been  restricted.    We  have  recently  updated  our
timelines  on  the  Basket  Study  but  the  changes  were  unrelated  to  COVID-19. We  are  continuing  our  regular  interactions
with  the  FDA  and  EMA  and  based  on  current  information.  We  do  not  currently  anticipate  any  disruption  in  the  clinical
supply of setmelanotide and our CMOs have indicated that they have appropriate plans and procedures in place to ensure
uninterrupted  future  supply  of  clinical  and  commercial-grade  setmelanotide,  subject  to  potential  limitations  on  their
operations due to COVID-19.  As a result, we do not currently expect that the COVID-19 pandemic will have a material
impact  on  our  business,  results  of  operations  and  financial  condition.    At  this  time,  however,  there  is  still  uncertainty
relating to the trajectory of the pandemic and the impact of related responses, and disruptions caused by the COVID-19
pandemic  have  resulted  and  may  in  the  future  result  in  difficulties  or  delays  in  initiating,  enrolling,  conducting  or
completing  our  planned  and  ongoing  clinical  trials  and  the  incurrence  of  unforeseen  costs  as  a  result  of  disruptions  in
clinical supply or preclinical study or clinical trial delays. For example, we experienced interruption of key clinical trial
activities, such as patient attendance and clinical trial site monitoring, in our Phase 3 clinical trial evaluating setmelanotide
for  the  treatment  of  insatiable  hunger  and  severe  obesity  in  individuals  with  BBS  or  Alström  syndrome.  The  impact  of
COVID-19  on  our  future  results  will  largely  depend  on  future  developments,  which  are  highly  uncertain  and  cannot  be
predicted  with  confidence,  such  as  the  ultimate  geographic  spread  of  the  disease,  the  duration  of  the  pandemic,  travel
restrictions  and  social  distancing  in  the  United  States  and  other  countries,  business  closures  or  business  disruptions,  the
ultimate impact on financial markets and the global economy, the effectiveness of vaccines and vaccine distribution efforts
and the effectiveness of other actions taken in the United States and other countries to contain and treat the disease. See
“Risk Factors—The COVID-19 pandemic has and may continue to adversely impact our business, including our preclinical
studies, clinical trials and our commercialization prospects.” in Part I, Item 1A of this Annual Report.

Financial Operations Overview

Revenue

To  date,  we  have  not  generated  any  revenue  from  product  sales.  Our  lead  product  candidate,  IMCIVREE,  was
recently approved by the FDA for chronic weight management in adult and pediatric patients six years of age and older
with  obesity  due  to  POMC,  PCSK1  or  LEPR  deficiency  confirmed  by  genetic  testing.  We  expect  IMCIVREE  to  be
commercially  available  in  the  first  quarter  of  2021.    We  cannot  predict  if,  when,  or  to  what  extent  we  will  generate
revenues from the commercialization and sale of IMCIVREE.  

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Research and development expenses

Research and development expenses consist primarily of costs incurred for our research activities, including our

drug discovery and genetic sequencing efforts, and the clinical development of setmelanotide, which include:

● expenses  incurred  under  agreements  with  third  parties,  including  CROs  that  conduct  research  and
development and preclinical activities on our behalf, and the cost of consultants and CMOs that manufacture
drug products for use in our preclinical studies and clinical trials;

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

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

● the cost of genetic sequencing of potential patients in clinical studies; and

● facilities, depreciation, and other expenses, which include rent and maintenance of facilities, insurance and

other operating costs.

We  expense  research  and  development  costs  to  operations  as  incurred.  Nonrefundable  advance  payments  for
goods  or  services  to  be  received  in  the  future  for  use  in  research  and  development  activities  are  recorded  as  prepaid
expenses. The capitalized amounts are expensed as the related goods are delivered or the services are performed.

The following table summarizes our current research and development expenses:

Research and development summary

Research and development expense

Year ended December 31, 

2020
$  90,450

2019
$  109,450

We are unable to predict the duration and costs of the current or future clinical trials of our product candidates.
The  duration,  costs,  and  timing  of  clinical  trials  and  development  of  setmelanotide  will  depend  on  a  variety  of  factors,
including:

● the scope, rate of progress, and expense of our ongoing, as well as any additional, clinical trials and other

research and development activities;

● the rate of enrollment in clinical trials;

● the safety and efficacy demonstrated by setmelanotide in future clinical trials;

● changes in regulatory requirements;

● changes in clinical trial design; and

● the timing and receipt of any regulatory approvals.

A  change  in  the  outcome  of  any  of  these  variables  with  respect  to  the  development  of  our  product  candidates

would significantly change the costs and timing associated with its development and potential commercialization.

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 to

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increase significantly for the foreseeable future as our setmelanotide and other development programs progress. However,
we do not believe that it is possible at this time to accurately project total program-specific expenses to commercialization
and there can be no guarantee that we can meet the funding needs associated with these expenses.

Selling, general and administrative expenses

Selling  expenses  consist  of  professional  fees  related  to  preparation  for  the  eventual  commercialization  of
setmelanotide as well as salaries and related benefits for commercial employees, including stock-based compensation.  As
we  accelerate  our  preparation  for  commercialization  and  start  to  market  setmelanotide  and  as  we  explore  new
collaborations to develop and commercialize setmelanotide, we anticipate that these expenses will materially increase.

General  and  administrative  expenses  consist  primarily  of  salaries  and  other  related  costs,  including  stock-based
compensation, relating to our full-time employees not involved in R&D or commercial activities. Other significant costs
include rent, legal fees relating to patent and corporate matters and fees for accounting and consulting services.

The following table summarizes our current selling, general and administrative expenses.

Selling, general and administrative summary
Selling, general and administrative expense

Year ended December 31, 

2020
$  46,125

2019
$  36,550

We  anticipate  that  our  selling,  general  and  administrative  expenses  will  continue  to  increase  in  the  future  to
support continued and expanding development efforts, potential commercialization of setmelanotide and increased costs of
operating  as  a  public  company.  These  increases  will  likely  include  increased  costs  related  to  the  hiring  of  additional
personnel and fees to outside consultants, lawyers and accountants, compliance with exchange listing and SEC expenses,
insurance and investor relations costs, among other expenses.

Critical Accounting Policies and Estimates

Our management's discussion and analysis of our financial condition and results of operations are based on our
financial statements, which we have prepared in accordance with accounting principles generally accepted in the United
States, or GAAP. The preparation of these 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 revenues and expenses during the reporting periods. These items
are  monitored  and  analyzed  by  us  for  changes  in  facts  and  circumstances  on  an  ongoing  basis,  and  material  changes  in
these estimates could occur in the future.  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  financial  statements
included elsewhere in this Annual Report, we believe that the following accounting policies are the most critical to aid in
fully understanding and evaluating our financial condition and results of operations.

Accrued research and development expenses

As part of the process of preparing our financial statements, we are required to estimate the value associated with
goods and services received in the period in connection with research and development activities. 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, or alternatively, the deferral of amounts paid for goods or services to be incurred in the future.
The majority of our service providers invoice us monthly in arrears for services performed or when contractual milestones
are met. We make estimates of our accrued expenses or prepaid expenses as of each balance sheet date in our financial

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statements  based  on  facts  and  circumstances  known  to  us  at  the  time  those  financial  statements  are  prepared.  We
periodically  confirm  the  accuracy  of  our  estimates  with  the  service  providers  and  make  adjustments  if  necessary.  The
significant estimates in our accrued research and development expenses include fees paid to CROs, CMOs and consultants
in connection with research and development activities.

We accrue our expenses related to CROs, CMOs and consultants based on our estimates of the services received
and  efforts  expended  pursuant  to  quotes  and  contracts  with  CROs,  CMOs  and  consultants  that  conduct  research  and
development  and  manufacturing  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.  The  allocation  of  CRO  upfront  expenses  for  both
clinical  trials  and  preclinical  studies  generally  tracks  actual  work  activity.  However,  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  delivered  over  a  period  of  time,  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 accrued or prepaid expense accordingly. Although we do
not expect our estimates to be materially different from amounts actually incurred, if our estimates of the status and timing
of services performed differ from the actual status and timing of services performed, it could result in us reporting amounts
that are too high or too low in any particular period. To date, there have been no material differences between our estimates
of such expenses and the amounts actually incurred.

Stock-based compensation

We have a 2017 equity incentive plan, or the 2017 Plan. The 2017 Plan provides for the grant of incentive and
non-qualified  stock  options  and  restricted  stock  and  stock  grants  to  employees,  consultants,  advisors  and  directors,  as
determined by the Board of Directors. As of December 31, 2020, we had reserved 7,484,536 shares of common stock under
the  2017  Plan.  Shares  of  common  stock  issued  pursuant  to  awards  are  generally  issued  from  authorized  but  unissued
shares.  The  2017  Plan  provides  that  the  exercise  price  of  incentive  stock  options  cannot  be  less  than  100%  of  the  fair
market value of the common stock on the date of the award for participants who own less than 10% of the total combined
voting  power  of  stock,  and  not  less  than  110%  for  participants  who  own  more  than  10%  of  the  voting  power.  Awards
granted under the 2017 Plan will vest over periods as determined by our Compensation Committee and approved by our
Board of Directors.

We estimate the fair value of our stock option awards to employees and non-employees using the Black-Scholes
option-pricing model, which requires the input of subjective assumptions, including (a) the expected volatility of our stock,
(b) the expected term of the award, (c) the risk-free interest rate, and (d) expected dividends. Previously due to the lack of a
public market for the trading of our common stock and a lack of company-specific historical and implied volatility data, we
based  our  estimate  of  expected  volatility  on  the  historical  volatility  of  a  group  of  companies  in  the  pharmaceutical  and
biotechnology  industries  in  a  similar  stage  of  development  as  us  and  that  are  publicly  traded.  For  these  analyses,  we
selected  companies  with  comparable  characteristics  to  ours  including  enterprise  value,  risk  profiles  and  with  historical
share price information sufficient to meet the expected life of the stock-based awards. We compute the historical volatility
data  using  the  daily  closing  prices  for  the  selected  companies'  shares  during  the  equivalent  period  of  the  calculated
expected term of our stock-based awards. During 2020, we began to estimate volatility by using a blend of our stock price
history for the length of time we have market data for our stock and the historical volatility of similar public companies for
the expected term of each grant.  We will continue to apply this process until a sufficient amount of historical information
regarding the volatility of our own stock price becomes available.

We have estimated the expected life of our employee stock options using the "simplified" method, whereby, the
expected life equals the average of the vesting term and the original contractual term of the option. The risk-free interest
rates for periods within the expected life of the option are based on the U.S. Treasury yield curve in effect during the period
the options were granted. We have elected to account for forfeitures as they occur.  Upon adopting Accounting Standards
Update 2018-07, Improvements to Nonemployee Share-Based Payment Accounting (Topic 718) on July 1, 2018, we elected
that  unsettled  equity-classified  awards  to  nonemployees  for  which  a  measurement  date  has  not  been  established  be
measured using the adoption date fair value.

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Income taxes

We account for uncertain tax positions in accordance with the provisions of Accounting Standards Codification, or
ASC,  Topic  740,  Accounting  for  Income  Taxes,  or  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.  As  of  December  31,  2020,  we  did  not  have  any  uncertain  tax
positions.

Income  taxes  are  recorded  in  accordance  with  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 the financial statements or tax returns. We determine our deferred tax assets and liabilities based on
differences  between  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.

As of December 31, 2020, we had net operating loss carryforwards to reduce federal and state incomes taxes of
approximately $382.3 million and $351.2 million, respectively. If not utilized, these carryforwards begin to expire in 2033.
Of the federal net operating loss carryforwards at December 31, 2020, $309.1 million can be carried forward indefinitely.
  At  December  31,  2020,  we  also  had  available  research  and  development  tax  credits  for  federal  and  state  income  tax
purposes  of  approximately  $8.1  million  and  $2.8  million,  respectively.   Additionally,  as  of  December  31,  2020,  we  had
federal orphan drug credits related to qualifying research of $10.1 million.  These tax credit carryforwards begin to expire
in 2033 for federal purposes and 2028 for state purposes.  

Utilization of the net operating loss and tax credit carryforwards may be subject to a substantial annual limitation
due  to  ownership  change  limitations  that  have  occurred  previously  or  that  could  occur  in  the  future,  as  provided  by
Section  382  of  the  Internal  Revenue  Code  of  1986,  as  amended,  or  the  Code,  or  Section  382,  as  well  as  similar  state
provisions  and  other  provisions  of  the  Code.  Ownership  changes  may  limit  the  amount  of  net  operating  losses  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 5.0% stockholders in
the stock of a corporation by more than 50% in the aggregate over a three-year period.    

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Results of Operations

Comparison of years ended December 31, 2020 and 2019.

The  following  table  summarizes  our  results  of  operations  for  the  years  ended  December  31,  2020  and  2019,

together with the changes in those items in dollars and as a percentage:

Year Ended
December 31, 

2020

2019

(in thousands)

Change
$

%  

Statement of Operations Data:
Operating Expenses:

Research and development
Selling, general, and administrative

Total operating expenses
Loss from operations
Other income, net
Net loss

$

 90,450
 46,125
 136,575
   (136,575)
 2,579

$  109,450
 36,550
 146,000
   (146,000)
 5,271

$  (133,996) $  (140,729) $

$  (19,000)  (17)%
 9,575  26 %
 (9,425)  (6)%
 9,425  (6)%
 (2,692)  (51)%
 6,733  (5)%

Research  and  development  expense.  Research  and  development  expense  decreased  by  $19.0  million  to

$90.5 million in 2020 from $109.5 million in 2019, a decrease of 17%. The decrease was primarily due to the following:

● a  decrease  of  $15.7  million  related  to  our  clinical  trials  associated  with  setmelanotide.   We  completed  the
GO-ID genotyping study, the POMC and LEPR Phase 3 studies and the once weekly formulation study in
early to mid-2020.  These decreases were slightly offset by increases related to the expansion of the Phase 2
basket study as well as starting a new renal insufficiency PK study in 2020;

● a decrease of $8.7 million related to translational research and genetic sequencing efforts, as the completion

of the GO-ID study resulted in lower sequencing volume; and

● a decrease of $2.4 million related to fewer travel related expenses and conference related programs due to the

Covid-19 restrictions in place for most of 2020.

The above decreases were partially offset by:

● an increase of  $2.4 million due to the hiring of additional full-time employees in order to support the growth
of  our  research  and  development  programs,  as  well  as  efforts  to  support  our  education  programs  for
physicians, care providers and patients who are facing rare genetic disorders of obesity;

● an increase of $2.5 million primarily related to purchases of setmelanotide API and drug product for clinical

trials and preparation for potential commercialization; and

● an increase of $3.0 million due to the milestone expenses associated with the license agreement with Ipsen on
filing the NDA and MMA for setmelanotide for the treatment of POMC and LEPR deficiency obesities.

Selling, general and administrative expense. Selling, general and administrative expense increased by $9.6 million

to $46.1 million in 2020 from $36.6 million in 2019, an increase of 26%. The increase was primarily due to the following:

● an  increase  of  approximately  $0.9  million  in  cash  related  charges  incurred  with  the  separation  agreements
with our former CEO and CCO, and $4.9 million in non-cash related stock compensation expenses related
with those separation agreements as well as the hiring of our current CEO in July 2020; and an increase of

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approximately $0.5 million for employee related costs in connection with the hiring of additional full-time
employees to support planned commercial and operating activities;

● an increase of $1.7 million related to efforts to drive patient engagement and disease awareness about rare
genetic causes of obesity and prepare for the potential commercialization of setmelanotide in the U.S.; and

● an increase of $1.2 million related to consulting activity for market access development, legal services and
other costs associated with activities and implementation of certain processes relating to our compliance with
the Sarbanes Oxley Act.              

Liquidity and Capital Resources

As  of  December  31,  2020,  our  cash  and  cash  equivalents  and  short-term  investments  were  approximately

$172.8 million.

Cash flows

The following table provides information regarding our cash flows for the years ended December 31, 2020 and

2019:

Year Ended December 31, 

2020

2019

(in thousands)

Net cash provided by (used in):

Operating activities
Investing activities
Financing activities

Net increase in cash, cash equivalents and restricted cash

Net cash used in operating activities

$  (121,980) $  (122,750)
 (27,970)
 163,474
 12,754

 158,531
 2,009
 38,560

$

The use of cash in all periods resulted primarily from our net losses adjusted for non-cash charges and changes in

components of working capital.

Net  cash  used  in  operating  activities  was  $122.0  million  for  the  year  ended  December  31,  2020,  and  consisted
primarily  of  a  net  loss  of  $116.1  million  adjusted  for  non-cash  items,  which  consisted  of  non-cash  stock-based
compensation, depreciation and amortization and rent expense.  The change in operating assets and liabilities reflected a
total use of cash of approximately $5.9 million for a decrease in prepaid assets, accounts payable and accrued expenses due
to the timing of payments and a reduction of overall operating expenses.

Net  cash  used  in  operating  activities  was  $122.8  million  for  the  year  ended  December  31,  2019,  and  consisted
primarily  of  a  net  loss  of  $127.8  million  adjusted  for  non-cash  items,  which  consisted  of  non-cash  stock-based
compensation, depreciation and amortization and rent expense.  The change in operating assets and liabilities reflected a
total use of cash of approximately $6.4 million for an increase in prepaid expenses associated with our CROs and CMOs
due to the timing of payments offset by an increase of $10.5 million in accounts payable and accrued expenses.  We also
received proceeds of $0.9 million from tenant improvement allowances related to our new office space.

Net cash provided by (used in) investing activities

Net cash provided by investing activities for the year ended December 31, 2020 relates to the net maturities of

short-term investments of $158.7 million.

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Net cash used in investing activities for the year ended December 31, 2019 relates to net purchases of short-term
investments of $24.6 million and $3.4 million of cash used for tenant improvements and new furniture and fixtures related
to our new office space.

Net cash provided by financing activities

Net  cash  provided  by  financing  activities  was  $2.0  million  for  the  year  ended  December  31,  2020,  which

represents cash proceeds from the exercise of stock options and the issuance of common stock from the ESPP.

Net  cash  provided  by  financing  activities  was  $163.5  million  for  the  year  ended  December  31,  2019,  which
represents the net proceeds of $161.4 million from our common stock offering in October 2019 and $2.1 million of cash
proceeds from the exercise of stock options and the issuance of common stock from the ESPP.

Funding requirements

We  expect  our  expenses  to  increase  in  connection  with  our  ongoing  activities,  particularly  as  we  continue  the
clinical  development  of  and  seek  marketing  approval  for  setmelanotide  for  future  indications.  In  addition,  we  expect  to
incur  significant  commercialization  expenses  related  to  product  sales,  marketing,  manufacturing  and  distribution  to  the
extent  that  such  sales,  marketing  and  distribution  are  not  the  responsibility  of  potential  collaborators.  We  also  expect  to
incur additional costs associated with operating as a public company.

We expect that our cash and cash equivalents and short-term investments as of December 31, 2020, together with
the  proceeds  from  the  sale  of  the  PRV  Transfer  and  the  net  proceeds  from  the  2021  February  public  offering  of
approximately $260.1 million, will enable us to fund our operating expenses through at least the second half of 2023. We
may  need  to  obtain  substantial  additional  funding  in  connection  with  our  research  and  development  activities  and  any
continuing operations thereafter. If we are unable to raise capital when needed or on favorable terms, we would be forced
to delay, reduce or eliminate our research and development programs or future commercialization efforts.

Our future capital requirements will depend on many factors, including:

● the costs to commercialize setmelanotide, by building an internal sales force or entering into collaborations

with third parties and providing support services for patients;

● the scope, progress, results and costs of clinical trials for our setmelanotide program;

● the costs, timing and outcome of regulatory review of our setmelanotide program;

● the obligations owed to Ipsen Pharma S.A.S., or Ipsen, Camurus AB, or Camurus and Takeda pursuant to our

license agreements;

● the extent to which we acquire or in-license other product candidates and technologies;

● the costs of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual

property rights and defending intellectual property-related claims;

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

● the costs of operating as a public company and losing our emerging growth company status.

Although  IMCIVREE  has  been  approved  by  the  FDA  in  certain  indications,  and  we  expect  IMCIVREE  to  be
commercially  available  in  the  first  quarter  of  2021,  IMCIVREE  may  not  achieve  commercial  success.  In  addition,
developing  our  setmelanotide  program  is  a  time-consuming,  expensive  and  uncertain  process  that  may  take  years  to
complete, and we may never generate the necessary data or results required to obtain future marketing approvals and

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achieve  product  sales.  Accordingly,  we  will  need  to  continue  to  rely  on  additional  financing  to  achieve  our  business
objectives. Adequate additional financing may not be available to us on acceptable terms, or at all.

In  addition,  the  magnitude  and  duration  of  the  COVID-19  pandemic  and  its  impact  on  our  liquidity  and  future
funding  requirements  is  uncertain  as  of  the  filing  date  of  this  Annual  Report  as  this  continues  to  evolve  globally.  See
“Impact of Novel Coronavirus” above and “Risk Factors— The COVID-19 pandemic has and may continue to adversely
impact our business, including our preclinical studies, clinical trials and our commercialization prospects.” in Part I, Item
1A of this Annual Report for a further discussion of the possible impact of the COVID-19 pandemic on our business.

Until  such  time,  if  ever,  as  we  can  generate  substantial  product  revenues,  we  expect  to  finance  our  cash  needs
through a combination of equity offerings, debt financings, collaborations, strategic alliances and licensing arrangements.  

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

Contractual obligations

We enter into agreements in the normal course of business with CROs and CMOs for clinical trials and clinical
supply manufacturing and with vendors for clinical research studies and other services and products for operating purposes.
We do not classify these as contractual obligations where the contracts are cancelable at any time by us, generally upon
30 days' prior written notice to the vendor.

Milestone  and  royalty  payments  associated  with  our  license  agreements  with  Ipsen,  Camurus  and  Takeda,  have
not been included as contractual obligations as we cannot reasonably estimate if or when they will occur. Under the terms
of the Ipsen license agreement, assuming that setmelanotide is successfully developed, receives regulatory approval and is
commercialized,  Ipsen  may  receive  aggregate  payments  of  up  to  $40.0  million  upon  the  achievement  of  certain
development and commercial milestones under the license agreement and royalties on future product sales. The majority of
the  aggregate  payments  under  the  Ipsen  license  agreement  are  for  milestones  that  may  be  achieved  no  earlier  than  first
commercial sale of setmelanotide. In the event that we enter into a sublicense agreement, we will make payments to Ipsen,
depending on the date of the sublicense agreement, ranging from 10% to 20% of all revenues actually received under the
sublicense  agreement.  Under  the  terms  of  the  Camurus  license  agreement,  assuming  that  setmelanotide  is  successfully
developed,  receives  regulatory  approval  and  is  commercialized,  Camurus  may  receive  aggregate  payments  of  up  to
$64.75 million upon the achievement of certain development and commercial milestones under the license agreement and
royalties  on  future  product  sales.  The  majority  of  the  aggregate  payments  under  the  Camurus  license  agreement  are  for
milestones that may be achieved no earlier than first commercial sale of this formulation of setmelanotide.  Under the terms
of  the  Takeda  license  agreement,  assuming  that  RM-853,  is  successfully  developed,  receives  regulatory  approval  and  is
commercialized,  Takeda  may  receive  aggregate  payments  of  up  to  $140.0  million  upon  the  achievement  of  certain
development and commercial milestones under the license agreement and royalties on future product sales. The majority of
the aggregate payments under the Takeda license agreement are for milestones that may be achieved no earlier than first
commercial sale of the RM-853.

Based  on  our  current  development  plans as of December 31, 2020,  potential payments due to third parties,
during  the  next  12  months  from  the  filing  of  this  Annual  Report are estimated to be approximately $9.0 million in
commercial milestones, in connection with our license agreements. These milestones generally become  due  and  payable 
upon achievement of such milestones or sales.  When the achievement of these milestones or

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sales have not occurred, such contingencies are not recorded in our financial statements and are excluded from the table
below.

In August 2018, we amended our existing Lease Agreement for our head office facility in Boston, Massachusetts.
The new lease term commenced in May 2019 and has a term of six years with a five-year renewal option to extend the
lease.  The new lease includes approximately 13,600 square feet of office space.

Recent Accounting Pronouncements

For  a  discussion  of  pending  and  recently  adopted  accounting  pronouncements,  see  Note  2  to  our  audited

consolidated financial statements included elsewhere in this Annual Report.

Off-Balance Sheet Arrangements

We did not have, during the period presented, and we do not currently have, any off-balance sheet arrangements,

as defined under applicable SEC rules.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

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, including cash equivalents, are in the form, or may be in the form
of, money market funds or marketable securities and are or may be invested in U.S. Treasury and U.S. government agency
obligations. Due to the short-term maturities and low risk profiles of our investments, an immediate 100 basis point change
in interest rates would not have a material effect on the fair market value of our investments.

We are not materially exposed to market risk related to changes in foreign currency exchange rates.

Item 8. Financial Statements and Supplementary Data

See the consolidated financial statements filed as part of this Annual Report as listed under Item 15 below.

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

Not Applicable.

Item 9A. Controls and Procedures

Limitations on Effectiveness of Controls and Procedures

In designing and evaluating our disclosure controls and procedures, management recognizes that any controls and
procedures,  no  matter  how  well  designed  and  operated,  can  provide  only  reasonable  assurance  of  achieving  the  desired
control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource
constraints  and  that  management  is  required  to  apply  judgment  in  evaluating  the  benefits  of  possible  controls  and
procedures relative to their costs.

Evaluation of Disclosure Controls and Procedures

Our  management,  with  the  participation  of  our  principal  executive  officer  and  principal  financial  officer,  has
evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a- 15(e) and 15d- 15(e) under
the Securities Exchange Act of 1934, as amended, as of the end of the period covered by this Annual Report. Based on
such  evaluation,  our  principal  executive  officer  and  principal  financial  officer  have  concluded  that  as  of  December  31,
2020, our disclosure controls and procedures were effective at the reasonable assurance level.

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Management’s Annual Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting

(as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act).

Our  management  assessed  the  effectiveness  of  our  internal  control  over  financial  reporting  as  of  December  31,
2020. In making this assessment, it used the criteria established in Internal Control—Integrated Framework (2013) issued
by  the  Committee  of  Sponsoring  Organizations  of  the  Treadway  Commission  (COSO).  Based  on  such  assessment,  our
management has concluded that our internal control over financial reporting was effective, as of December 31, 2020. Ernst
& Young LLP, our independent registered public accounting firm, has issued an attestation report on our internal control
over  financial  reporting,  which  appears  in  this  Item  under  the  heading  “Report  of  Independent  Registered  Public
Accounting Firm” below.

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)  that  occurred  during  the  fourth  quarter  of  2020  that  have  materially  affected,  or  are
reasonably likely to materially affect, our internal control over financial reporting.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

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

Opinion on Internal Control Over Financial Reporting

We have audited Rhythm Pharmaceuticals, Inc.’s internal control over financial reporting as of December 31, 2020, based
on criteria established in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of
the  Treadway  Commission  (2013  framework),  (the  COSO  criteria).  In  our  opinion,  Rhythm  Pharmaceuticals,  Inc.  (the
Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2020,
based on the COSO criteria.

We  also  have  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board  (United
States)  (PCAOB),  the  consolidated  balance  sheets  of  the  Company  as  of  December  31,  2020  and  2019,  the  related
consolidated statements of operations and comprehensive loss, stockholders’ equity and cash flows for each of the three
years  in  the  period  ended  December  31,  2020,  and  the  related  notes  and  our  report  dated  March  1,  2021  expressed  an
unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its
assessment  of  the  effectiveness  of  internal  control  over  financial  reporting  included  in  the  accompanying  Management’s
Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s
internal control over financial reporting based on our audit. We are a public accounting firm registered with the 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 audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform
the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in
all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material
weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk,
and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides
a reasonable basis for our opinion.

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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  (1)  pertain  to  the  maintenance  of  records  that,  in  reasonable  detail,  accurately  and  fairly  reflect  the
transactions and dispositions of the assets of the company; (2) 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 (3) 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.

/s/ Ernst & Young LLP

Boston, Massachusetts
March 1, 2021

Item 9B. Other Information

None

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Item 10. Directors, Executive Officers and Corporate Governance

PART III

We  have  adopted  a  Code  of  Business  Conduct  and  Ethics  for  all  of  our  directors,  officers  and  employees,
including our principal executive officer, principal financial officer, principal accounting officer or controller, or persons
performing similar functions. We have posted a current copy of our Code of Business Conduct and Ethics on our website at
www.rhythmtx.com  in  the  “Investors  &  Media”  section  under  “Corporate  Governance.”  We  intend  to  disclose  on  our
website any amendments to, or waivers from, our Code of Business Conduct and Ethics that are required to be disclosed
pursuant  to  the  rules  of  the  SEC,  as  well  as  Nasdaq’s  requirement  to  disclose  waivers  with  respect  to  directors  and
executive officers.  The information contained on our website is not considered part of, or incorporated by reference into,
this Annual Report or any other filing that we make with the SEC.

The  remaining  information  required  under  this  item  is  incorporated  herein  by  reference  to  our  definitive  proxy
statement  for  our  2021  annual  meeting  of  stockholders,  which  proxy  statement  will  be  filed  with  the  Securities  and
Exchange Commission not later than 120 days after the close of our fiscal year ended December 31, 2020.

Item 11. Executive Compensation

The information required under this item is incorporated herein by reference to our definitive proxy statement for
our  2021  annual  meeting  of  stockholders,  which  proxy  statement  will  be  filed  with  the  Securities  and  Exchange
commission not later than 120 days after the close of our fiscal year ended December 31, 2020.

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

Equity Compensation Plan Information

The following table provides information as of December 31, 2020, regarding our common stock that may be

issued under (1) our 2017 Equity Incentive Plan, or the 2017 Plan; and (2) our 2017 Employee Stock Purchase Plan, or the
2017 ESPP.

Plan Category:
Equity compensation plans approved by
stockholders
2017 Plan
2017 ESPP

Equity compensation plans not approved
by stockholders
Total

Number of Securities
to be Issued Upon Exercise
of Outstanding Options,

Weighted-Average
Exercise Price
of Outstanding Options,

Number of Securities
Available for Future
Issuance Under Equity

Warrants and Rights

Warrants and Rights

Compensation Plans

 5,375,772
 —

 —
 5,375,772

$

$

 21.30

 —  

 —
 21.30

 2,108,764
 1,000,993

 —
 3,109,757

(1) The 2017 Plan provides for an annual increase on each January 1 commencing on January 1, 2018, by an amount equal to 4% of the number of shares
of common stock outstanding as of the end of the immediately preceding fiscal year, provided that the Board may provide for no increase or that the
increase will be a lesser number of shares.

(2) The 2017 ESPP provides for an annual increase on each January 1 commencing on January 1, 2018 and ending on and including January 1, 2027, by
an amount equal to the lesser of (i) 1% of the number of shares of common stock outstanding as of the end of the immediately preceding fiscal year or
(ii) 682,102, provided that the Board may provide for no increase or that the increase will be a lesser number of shares.

121

    
    
    
 
 
 
 
 
 
 
 
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Other

The  remaining  information  required  under  this  item  is  incorporated  herein  by  reference  to  our  definitive  proxy
statement  for  our  2021  annual  meeting  of  stockholders,  which  proxy  statement  will  be  filed  with  the  Securities  and
Exchange commission not later than 120 days after the close of our fiscal year ended December 31, 2020.

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

The information required under this item is incorporated herein by reference to our definitive proxy statement for
our  2021  annual  meeting  of  stockholders,  which  proxy  statement  will  be  filed  with  the  Securities  and  Exchange
commission not later than 120 days after the close of our fiscal year ended December 31, 2020.

Item 14. Principal Accountant Fees and Services

The information required under this item is incorporated herein by reference to our definitive proxy statement for
our  2021  annual  meeting  of  stockholders,  which  proxy  statement  will  be  filed  with  the  Securities  and  Exchange
commission not later than 120 days after the close of our fiscal year ended December 31, 2020.

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Item 15. Exhibits and Financial Statement Schedules

(a) 1. Consolidated Financial Statements.

PART IV

For a list of the consolidated financial statements included herein, see Index on page F-1 of this report.

2. Financial Statement Schedules.

All financial statement schedules have been omitted because the required information is either presented in the
consolidated financial statements or the notes thereto or is not applicable or required.

3. List of Exhibits.

The following is a list of exhibits filed as part of this Annual Report.

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Table of Contents

Exhibit
Number
2.1

3.1

3.2
4.1
4.2

4.3

4.4

4.5

10.1†
10.2†

10.3.1†

10.3.2†

10.4.1†
10.4.2†

10.5†*

10.6‡

10.7‡

10.8‡

10.9.1‡

10.9.2‡

10.9.3‡

Exhibit Index

Exhibit Description
Asset Purchase Agreement, dated January 5, 2021,
between the Registrant and Alexion
Pharmaceuticals, Inc.
Amended and Restated Certificate of
Incorporation.
Amended and Restated Bylaws.
Form of Common Stock Certificate.
Amended and Restated Investors' Rights
Agreement, dated August 21, 2017.
Form of Subordinated Indenture to be entered into
between the Registrant and a trustee acceptable to
the registrant.
Form of Senior Indenture to be entered into
between the Registrant and a trustee acceptable to
the registrant.
Description of the Registrant’s Securities
registered pursuant to Section 12 of the Securities
Exchange Act of 1934.
Form of Indemnification Agreement.
2015 Equity Incentive Plan and Form of Option
Agreement and Notice of Exercise.
2017 Equity Incentive Plan and Form of Option
Agreement and Notice of Exercise.
2017 Equity Incentive Plan Restricted Stock Unit
Award Agreement
2017 Employee Stock Purchase Plan
First Amendment to the 2017 Employee Stock
Purchase Plan
Summary of Non-Employee Director
Compensation Policy
License Agreement, dated March 21, 2013, by and
between the Registrant (f/k/a Rhythm Metabolic,
Inc.) and Ipsen Pharma S.A.S.
License Agreement, dated January 4, 2016, by and
between the Registrant and Camurus AB.
License Agreement, dated March 30, 2018, by and
between the Registrant and Takeda Pharmaceutical
Company Limited.
Development and Manufacturing Services
Agreement, dated July 17, 2013, by and between
the Registrant (f/k/a Rhythm Metabolic, Inc.) and
Peptisyntha Inc. (n/k/a Corden Pharma
International).
First Amendment to Development and
Manufacturing Services Agreement, dated
February 20, 2020, by and between the Registrant
and Corden Pharma Brussels S.A.
Second Amendment to Development and
Manufacturing Services Agreement, dated July

124

Incorporated by Reference

Form
8-K

Date
1/5/2021

10-Q

5/4/2020

8-K
S-1/A
S-1

12/11/2020
9/25/2017
9/5/2017

S-3

11/9/2018

Number

2.1

3.1

3.1
4.1
4.2

4.3

S-3

11/9/2018

4.4

10-K

3/2/2020

4.5

S-1/A
S-1/A

9/25/2017
9/25/2017

10.1
10.21

10-Q

11/14/2017

10.2

10-K

3/2/2020

10-Q
S-1

11/14/2017
6/18/2018

10.18

10.10
10.17

S-1

9/5/2017

10.6

S-1

9/5/2017

10-Q

5/14/2018

10.8

10.1

S-1

9/5/2017

10.7

10-Q

5/4/2020

10.3

10-Q

8/3/2020

10.1

Table of Contents

10.10

10.11.1

10.11.2

10.11.3

10.12†

10.13†

10.14†*

10.15†*

10.16†*

10.17†

10.18.1†

10.18.2†

10.18.3†

10.19.1†

10.19.2†

21.1*
23.1*

31.1*

31.2*

32.1**

15, 2020, by and between the Registrant and
Corden Pharma Brussels S.A.
Development and Manufacturing Services
Agreement, dated as of December 21, 2016, by and
between Registrant and Recipharm Monts S.A.S.
Lease, dated November 25, 2015, by and between
the Registrant and 500 Boylston & 222 Berkeley
Owner (DE) LLC.
First Amendment to Lease, dated April 15, 2016,
by and between the Registrant and 500 Boylston &
222 Berkeley Owner (DE) LLC.
Second Amendment to Lease, dated August 6,
2018, by and between the Registrant and 500
Boylston & 222 Berkeley Owner (DE) LLC.
Offer Letter, dated December 21, 2017, by and
between the Registrant and Hunter Smith.
Offer Letter, dated September 4, 2020, by and
between the Registrant and Yann Mazabraud.
Offer Letter, dated May 10, 2018, by and between
the Registrant and Simon D. Kelner.
Offer Letter, dated September 14, 2018, by and
between the Registrant and Murray Stewart M.D.
Offer Letter, dated September 25, 2020, by and
between the Registrant and Jennifer Chien.
Offer Letter, dated July 16, 2020, by and between
the Registrant and David P. Meeker M.D.
Offer Letter, dated September 13, 2017, by and
between the Registrant and Keith M. Gottesdiener
Separation Agreement and General Release, by and
between the Registrant and Keith Gottesdiener,
dated January 6, 2020.
Consulting Agreement, by and between the
Registrant and Keith Gottesdiener, dated January 6,
2020.
Offer Letter, dated September 13, 2017, by and
between the Registrant and Nithya Desikan
Separation Agreement, dated September 30, 2020,
by and between the Registrant and Nithya Desikan.
List of Subsidiaries.
Consent of Ernst & Young LLP, Independent
Registered Public Accounting Firm.
Certification of the Chief Executive Officer, as
required by Section 302 of the Sarbanes-Oxley Act
of 2002 (18 U.S.C. 1350).
Certification of the Chief Financial Officer, as
required by Section 302 of the Sarbanes-Oxley Act
of 2002 (18 U.S.C. 1350).
Certification of the Chief Executive Officer, as
required by Section 906 of the Sarbanes-Oxley Act
of 2002 (18 U.S.C. 1350).

125

S-1

9/5/2017

10.15

S-1

9/5/2017

10.11

10-K

3/8/2019

10.9

8-K

8/9/2018

10.1

10-Q

5/4/2020

10-Q

11/2/2020

10.2

10.1

8-K

7/21/2020

10-Q

8/8/2018

8-K

1/8/2020

10.1

10.2

10.1

8-K

1/8/2020

10.2

10-Q

8/8/2018

10-Q

11/2/2020

10.4

10.2

Table of Contents

32.2**

101.INS*

101.SCH*

101.CAL*

101.DEF*

101.LAB*

101.PRE*

104

Certification of the Chief Financial Officer, as
required by Section 906 of the Sarbanes-Oxley
Act of 2002 (18 U.S.C. 1350).

Inline XBRL Instance Document- the Instance
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file because its XBRL tags are embedded within
the Inline XBRL document.
Inline XBRL Taxonomy Extension Schema
Document.

Inline XBRL Taxonomy Extension Calculation
Linkbase Document.

Inline XBRL Taxonomy Extension Definition
Linkbase Document.

Inline XBRL Taxonomy Extension Label
Linkbase Document.

Inline XBRL Taxonomy Extension Presentation
Linkbase Document.

Cover Page Interactive Data File (formatted as
Inline XBRL and contained in Exhibit 101).

*            Filed herewith.
**          Furnished and not filed herewith.
†            Indicates management contract or compensatory plan.
‡                         Indicates  confidential  treatment  has  been  requested  with  respect  to  specific  portions  of  this  exhibit.  Omitted
portions have been filed with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act.

Item 16. Form 10-K Summary

None

126

Table of Contents

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

this report to be signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

RHYTHM PHARMACEUTICALS, INC.

By:

/s/ David P. Meeker M.D.
David P. Meeker M.D.
President and Chief Executive Officer

Pursuant  to  the  requirements  of  the  Securities  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.

Name

Title

/s/ David P. Meeker M.D.
David P. Meeker M.D.

Chief Executive Officer, Director, Chairman of the Board
(Principal Executive Officer)

/s/ Hunter Smith
Hunter Smith

/s/ Edward T. Mathers
Edward T. Mathers

/s/ Stuart Arbuckle
Stuart Arbuckle

/s/ Camille L. Bedrosian, M.D.
Camille L. Bedrosian M.D.

/s/ Todd Foley
Todd Foley

/s/ Jennifer L. Good
Jennifer L. Good

/s/ Christophe R. Jean
Christophe R. Jean

/s/ David W. J. McGirr
David W. J. McGirr

/s/ Lynn A. Tetrault
Lynn A. Tetrault

Chief Financial Officer
(Principal Financial and Accounting Officer)

Lead Director

Director

Director

Director

Director

Director

Director

Director

127

Date

March 1, 2021

March 1, 2021

March 1, 2021

March 1, 2021

March 1, 2021

March 1, 2021

March 1, 2021

March 1, 2021

March 1, 2021

March 1, 2021

    
    
Table of Contents

RHYTHM PHARMACEUTICALS, INC. 

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm

Audited Consolidated Financial Statements:
Consolidated Balance Sheets
Consolidated Statements of Operations and Comprehensive Loss
Consolidated Statements of Stockholders’ Equity
Consolidated Statements of Cash Flows
Notes to Consolidated Financial Statements

F-1

Page No.
F-2

F-4
F-5
F-6
F-7
F-8

Table of Contents

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

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

Opinion on the Financial Statements

We  have  audited  the  accompanying  consolidated  balance  sheets  of  Rhythm  Pharmaceuticals,  Inc.  (the  Company)  as  of
December  31,  2020  and  2019,  the  related  consolidated  statements  of  operations  and  comprehensive  loss,  stockholders’
equity and cash flows for each of the three years in the period ended December 31, 2020, and the related notes (collectively
referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly,
in  all  material  respects,  the  financial  position  of  the  Company  at  December  31,  2020  and  2019,  and  the  results  of  its
operations and its cash flows for each of the three years in the period ended December 31, 2020, in conformity with U.S.
generally accepted accounting principles.

We  also  have  audited,  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board  (United
States)  (PCAOB),  the  Company's  internal  control  over  financial  reporting  as  of  December  31,  2020,  based  on  criteria
established  in  Internal  Control  –  Integrated  Framework  issued  by  the  Committee  of  Sponsoring  Organizations  of  the
Treadway Commission (2013 framework), and our report dated March 1, 2021 expressed an unqualified opinion thereon.

Adoption of New Accounting Standards

As discussed in Note 2, Summary of Significant Accounting Policies, to the consolidated financial statements, the Company
changed its method of accounting for leases in 2019 due to the adoption of Accounting Standards Update (ASU) No. 2016-
02, Leases (Topic 842), as amended, effective January 1, 2019, using the modified retrospective method.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion
on the Company’s financial statements based on our audits. We are a public accounting firm registered with the 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 audit to obtain reasonable assurance about whether the financial statements are free of material misstatement,
whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the
financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures
included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits
also  included  evaluating  the  accounting  principles  used  and  significant  estimates  made  by  management,  as  well  as
evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our
opinion.

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Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements
that  was  communicated  or  required  to  be  communicated  to  the  audit  committee  and  that:  (1)  relates  to  accounts  or
disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex
judgments.  The  communication  of  the  critical  audit  matter  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.

Description  of  the
Matter

How  We  Addressed
the  Matter  in  Our
Audit

Accrued and Prepaid Research and Development Expenses

The  Company’s  total  accrued  expenses  and  other  current  liabilities  were  $12.6  million  at
December 31, 2020, which included the estimated obligation for research and development
expenses  incurred  as  of  December  31,  2020  but  not  paid  as  of  that  date.  In  addition,  the
Company’s  total  prepaid  expenses  and  other  current  assets  were  $8.9  million  at  December
31, 2020, which included amounts that were paid in advance of services incurred pursuant to
research  and  development  activities.  As  discussed  in  Note  2  of  the  consolidated  financial
statements, the Company’s research and development expenses are based on the Company’s
estimates  of  the  progress  of  the  related  studies  or  clinical  trials,  including  the  phase  or
completion of events, invoices received, and contracted costs, which results in an accrual or
prepayment at period end.

Auditing  the  Company’s  accrued  and  prepaid  research  and  development  expenses  was
especially challenging due to the application of significant management judgment about the
estimate of services provided but not yet invoiced. Specifically, the amount of accrued and
prepaid  research  and  development  expenses  recognized  is  sensitive  to  the  availability  of
information to make the estimate, including the estimate of the period over which services
will be performed, the associated cost of such services, and the level of services performed
and progress in the period for which the Company has not yet received an invoice from the
supplier. Additionally, due to the long duration of clinical trials and the timing of invoicing
received from third parties, the actual amounts incurred are not always known by the report
date.

To  evaluate  the  Company’s  estimate  of  services  incurred  as  of  period  end  pursuant  to  its
research and development activities, our audit procedures included, among others, testing the
completeness and accuracy of the underlying data used in the estimates and evaluating the
significant assumptions stated above that are used by management to estimate the recorded
amounts.  To  assess  the  reasonableness  of  the  significant  assumptions,  we  obtained
information regarding the nature and extent of progress of clinical trials and other activities
from the Company’s research and development personnel that oversee the clinical trials and
obtained information directly from third parties which indicated the third parties’ estimate of
costs incurred to date. To evaluate the completeness and valuation of the accrued or prepaid
research  and  development  expenses,  we  compared  invoices  received  by  the  Company
subsequent to December 31, 2020 to the amounts recognized by the Company as of that date.
We inspected the Company’s contracts with third parties and any pending change orders to
assess  the  impact  to  the  amounts  recorded.  We  also  independently  estimated  the  services
incurred  by  the  respective  third-party  and  compared  it  to  the  amount  recognized  by  the
Company.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2015.
Boston, Massachusetts
March 1, 2021

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RHYTHM PHARMACEUTICALS, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share data)

Assets
Current assets:

Cash and cash equivalents
Short-term investments
Prepaid expenses and other current assets
Total current assets

Property and equipment, net
Right-of-use asset
Restricted cash
Total assets

Liabilities and stockholders’ equity
Current liabilities:
Accounts payable
Accrued expenses and other current liabilities
Lease liability
Total current liabilities

Long-term liabilities:
Lease liability
Total liabilities
Commitments and contingencies (Notes 5 and 9)
Stockholders’ equity:

December 31, 
2020

December 31, 
2019

$

$

$

$ 100,854
71,938
8,876
181,668
3,195
1,807
403
$ 187,073

$

4,900
12,559
535
17,994

2,551
20,545

62,294
230,165
9,945
302,404
3,671
2,045
403
308,523

10,415
13,530
472
24,417

3,086
27,503

Preferred Stock, $0.001 par value: 10,000,000 shares authorized; no shares issued and
outstanding at December 31, 2020 and December 31, 2019
Common stock, $0.001 par value: 120,000,000 shares authorized; 44,235,903 and
43,996,753 shares issued and outstanding at December 31, 2020 and December 31, 2019,
respectively
Additional paid-in capital
Accumulated other comprehensive income
Accumulated deficit
Total stockholders’ equity
Total liabilities and stockholders’ equity

—  

—

44
625,762
49
(459,327)
166,528
$ 187,073

$

44
606,307
—
(325,331)
281,020
308,523

The accompanying notes are an integral part of these financial statements

F-4

    
    
 
   
  
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
Table of Contents

RHYTHM PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(in thousands, except share and per share data)

Operating expenses:

Research and development
Selling, general, and administrative
Total operating expenses

Loss from operations
Other income (expense):
Interest income, net
Total other income, net
Net loss

Net loss per share, basic and diluted
Weighted-average common shares outstanding, basic and diluted

Other comprehensive loss:

Net loss
Unrealized gain on marketable securities

Comprehensive loss

Year Ended
December 31, 
2020

Year Ended
December 31, 
2019

Year Ended
December 31, 
2018

$

$

90,450
46,125
136,575
(136,575)

109,450
36,550
146,000
(146,000)

$

50,337
28,080
78,417
(78,417)

2,579
2,579
(133,996) $
(3.04) $

$
$
  44,127,220

5,271
5,271
(140,729) $
(3.86) $

4,353
4,353
(74,064)
(2.39)
  31,004,047

  36,422,450

$

$

(133,996) $
49
(133,947) $

(140,729) $
144
(140,585) $

(74,064)
—
(74,064)

The accompanying notes are an integral part of these financial statements

F-5

    
    
    
    
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
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RHYTHM PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(in thousands, except share data)

Common Stock

Amount

Balance at December 31, 2017

Adoption of new accounting standard
Stock compensation expense
Shares issued for license agreement
Issuance of common stock upon completion of public offering, net of
offering costs
Issuance of common stock in connection with exercise of stock options
Unrealized gain on marketable securities
Net loss

Balance at December 31, 2018
Stock compensation expense
Issuance of common stock in connection with ESPP
Issuance of common stock in connection with exercise of stock options
Issuance of common stock upon completion of public offering, net of
offering costs
Unrealized gain on marketable securities
Net loss

Balance at December 31, 2019
Stock compensation expense
Issuance of common stock in connection with ESPP
Issuance of common stock in connection with exercise of stock options
and vesting of restricted stock units
Unrealized gain on marketable securities
Net loss

Balance at December 31, 2020

Shares
27,284,140

$
—  
—  

223,544

6,591,800
311,241

—  
—  

34,410,725

—  

25,871
235,833

9,324,324

—  
—
43,996,753

—  

30,052

209,098

—  
—
44,235,903

$

Additional
Paid-In
Capital

Accumulated
Other
Comprehensive
Income

Accumulated
Deficit

Total
Stockholders’
Equity

27  
—  
—  
—  

7  
—  
—  
—  
34  
—  
—  
1  

9  
—  
—
44
—  
—  

—  
—  
—
44

$

 $

255,013
286
6,390
4,448

162,871
1,808
8
—
430,824
11,875
558
1,563

161,343
144
—
606,307
17,455
522

1,478
—
—
625,762

$

$

—   $
—  
—  
—  

(110,252)  $
(286) 
—  
—  

—  
—  
—  
—  
—  
—  
—  
—  

—  
—  
—
—
—  
—  

—  
49  
—
49

 $

—  
—  
—  
(74,064) 
(184,602) 
—  
—  
—  

—  
—  
(140,729)
(325,331)
—  
—  

—  
—  
(133,996)
(459,327)

 $

144,788
—
6,390
4,448

162,878
1,808
8
(74,064)
246,256
11,875
558
1,564

161,352
144
(140,729)
281,020
17,455
522

1,478
49
(133,996)
166,528

The accompanying notes are an integral part of these financial statements

F-6

    
    
    
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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RHYTHM PHARMACEUTICALS, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

Operating activities
Net loss
Adjustments to reconcile net loss to cash used in operating activities:

Non-cash research and development license expense
Stock-based compensation expense
Depreciation and amortization
Deferred rent

Changes in operating assets and liabilities:
Prepaid expenses and other current assets
Tenant improvement allowance
Accounts payable, accrued expenses and other current liabilities

Net cash used in operating activities

Investing activities
Purchases of short-term investments
Maturities of short-term investments
Purchases of property and equipment

Net cash provided by (used in) investing activities

Financing activities
Net proceeds from issuance of common stock
Proceeds from the exercise of stock options
Proceeds from issuance of common stock from ESPP

Net cash provided by financing activities

Net increase in cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash at beginning of period
Cash, cash equivalents and restricted cash at end of period

Year ended December 31, 
2019

2018

2020

$ (133,996) $ (140,729) $ (74,064)

—  

—  

17,455
690
(234)

11,875
834
203

4,448
6,390
442
61

551
—  

(6,378)
938
10,507
  (122,750)

(6,446)
  (121,980)

(6,286)
—
6,953
(62,056)

(86,869)
  245,614
(214)
  158,531

  (295,825)
271,240
(3,385)
(27,970)

  (248,592)
162,166
(722)
(87,148)

—
1,487
522
2,009
38,560
62,697
$ 101,257

161,352
1,564
558
163,474
12,754
49,943
62,697

$

162,878
1,808
—
164,686
15,482
34,461
49,943

$

The accompanying notes are an integral part of these financial statements

F-7

    
    
    
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Rhythm Pharmaceuticals, Inc.

Notes to Consolidated Financial Statements

 (In thousands, except share and per share information)

1. Nature of Business

Rhythm  Pharmaceuticals,  Inc.  (the  “Company”  or  “We”),  is  a  commercial-stage  biopharmaceutical  company
focused on changing the paradigm for the treatment of rare genetic diseases of obesity, which are characterized by early-
onset, severe obesity and an insatiable hunger or hyperphagia.  Our lead product candidate is IMCIVREE (setmelanotide),
a  potent  melanocortin-4  receptor,  or  MC4R,  agonist  for  the  treatment  of  rare  genetic  diseases  of  obesity.  We  believe
IMCIVREE, for which we have exclusive worldwide rights, has the potential to restore dysfunctional MC4R signaling due
to  impaired  MC4R  pathway  function.  MC4R  pathway  deficiencies  result  in  the  disruption  of  satiety  signals  and  energy
homeostasis in the body, which, in turn, leads to intense feelings of hunger and to obesity. IMCIVREE has been approved
by  the  U.S.  Food  and  Drug  Administration,  or  FDA,  for  chronic  weight  management  in  adult  and  pediatric  patients  six
years of age and older with obesity due to proopiomelanocortin, or POMC, proprotein convertase subtilisin/kexin type 1, or
PCSK1, or leptin receptor, or LEPR, deficiency confirmed by genetic testing. We expect IMCIVREE to be commercially
available in the first quarter of 2021.

The Company is a Delaware corporation organized in February 2013 under the name Rhythm Metabolic, Inc.,

and as of October 2015, under the name Rhythm Pharmaceuticals, Inc.

The  Company’s  continued  development  efforts  are  focused  on  obesity  related  to  several  single  gene-related,  or
monogenic,  MC4R  pathway  deficiencies:  Bardet-Biedl  syndrome,  or  BBS;  Alström  syndrome;  POMC  or  LEPR
heterozygous deficiency obesity; steroid receptor coactivator 1, or SRC1, deficiency obesity; SH2B adapter protein 1, or
SH2B1, deficiency obesity; MC4R deficiency obesity and Smith-Magenis syndrome, as well as additional disorders as part
of investigator-initiated protocols. Currently, there are no effective or approved treatments for these MC4R pathway-related
disorders.  The  Company  believes  that  the  MC4R  pathway  is  a  compelling  target  for  treating  these  genetic  disorders
because  of  its  critical  role  in  regulating  appetite  and  weight  by  promoting  satiety  and  weight  control,  and  that  peptide
therapeutics are uniquely suited for activating this target.

  In  March  2018,  the  Company  acquired  exclusive,  worldwide  rights  from  Takeda  Pharmaceutical  Company
Limited  (“Takeda”)  to  develop  and  commercialize  T-3525770  (now  “RM-853”).  RM-853  is  a  potent,  orally  available
ghrelin  o-acyltransferase  (“GOAT”)  inhibitor  currently  in  preclinical  development  for  Prader-Willi  Syndrome  (“PWS”).
PWS is a rare genetic disorder that results in hyperphagia and early-onset, life-threatening obesity, for which there are no
approved therapeutic options.

The Company is subject to risks and uncertainties common to late-stage companies in the biotechnology industry,
including  but  not  limited  to,  risks  associated  with  the  commercialization  of  approved  products,  completing  preclinical
studies  and  clinical  trials,  receiving  regulatory  approvals  for  product  candidates,  development  by  competitors  of  new
biopharmaceutical  products,  dependence  on  key  personnel,  protection  of  proprietary  technology,  compliance  with
government  regulations  and  the  ability  to  secure  additional  capital  to  fund  operations.  Commercialization  of  approved
products  will  require  significant  resources  and  in  order  to  market  IMCIVREE,  the  Company  must  continue  to  build  its
sales, marketing, managerial and other non-technical capabilities or make arrangements with third parties to perform these
services.  Product  candidates  currently  under  development  will  require  significant  additional  research  and  development
efforts, including preclinical and clinical testing and regulatory approval, prior to commercialization. These efforts require
significant  amounts  of  additional  capital,  adequate  personnel  and  infrastructure  and  extensive  compliance-reporting
capabilities. Even though the Company has an approved product, and even if the Company’s further product development
efforts are successful, it is uncertain when, if ever, the Company will realize revenue from product sales.

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Table of Contents

Liquidity

The  Company  has  incurred  operating  losses  and  negative  cash  flows  from  operations  since  inception.    As  of
December  31,  2020,  the  Company  had  an  accumulated  deficit  of  $459,327.    The  Company  has  primarily  funded  these
losses through the proceeds from the sales of common and preferred stock as well as capital contributions received from
the  former  parent  company,  Rhythm  Holdings  LLC.  To  date,  the  Company  has  no  product  revenue  and  management
expects operating losses to continue for the foreseeable future. The Company has devoted substantially all of its resources
to its drug development efforts, comprising of research and development, manufacturing, conducting clinical trials for its
product  candidates,  protecting  its  intellectual  property,  pre-commercialization  activities  and  general  and  administrative
functions relating to these operations. The future success of the Company is dependent on its ability to develop its product
candidates and ultimately upon its ability to attain profitable operations.

At December 31, 2020, the Company had $172,792 of cash and cash equivalents and short-term investments on
hand.  Subsequent to year end, the Company received additional funding in connection with the sale of a Rare Pediatric
Disease  Priority  Review  Voucher,  or  PRV,  and  a  public  offering  (see  Note  12,  “Subsequent  Events”).  The  net  proceeds
from the sale of the PRV Transfer and this offering, or the February 2021 public offering, were approximately $260,050
after deducting underwriting discounts and commissions and estimated offering expenses.  In the future, the Company will
be dependent on obtaining funding from third parties, such as proceeds from the issuance of debt, sale of equity and funded
research and development programs, to maintain the Company's operations and meet the Company's obligations. There is
no guarantee that additional equity or other financings will be available to the Company on acceptable terms, or at all. If
the Company fails to obtain additional funding when needed, the Company would be forced to scale back, terminate its
operations or seek to merge with or be acquired by another company. Management believes that the Company's existing
cash resources will be sufficient to fund the Company's operations through at least the next twelve months from the filing
of this Annual Report on Form 10-K with the SEC.  

2. Summary of Significant Accounting Policies

Basis of Presentation

The  Company's  consolidated  financial  statements  have  been  prepared  in  conformity  with  accounting  principles
generally accepted in the United States (“GAAP”). Any reference in these notes to applicable guidance is meant to refer to
the authoritative United States generally accepted accounting principles as found in the Accounting Standards Codification
(“ASC”) and Accounting Standards Updates (“ASU”) of the Financial Accounting Standards Board (“FASB”).

Use of Estimates

The  preparation  of  financial  statements  in  conformity  with  GAAP  requires  management  to  make  estimates  and
assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities at the date
of the financial statements and the reported amounts of revenue and expenses during the reporting period. The Company
bases its estimates on historical experience and other market-specific or other relevant assumptions that it believes to be
reasonable  under  the  circumstances.  This  process  may  result  in  actual  results  differing  materially  from  those  estimated
amounts  used  in  the  preparation  of  the  financial  statements  if  these  results  differ  from  historical  experience,  or  other
assumptions do not turn out to be substantially accurate, even if such assumptions are reasonable when made. Significant
estimates  relied  upon  in  preparing  these  financial  statements  include  accruals  related  to  research  and  development
expenses, assumptions used to record stock-based compensation expense and the valuation allowance on the Company's
deferred  tax  assets.    Estimates  are  periodically  reviewed  in  light  of  changes  in  circumstances,  facts  and  experience.
 Changes in estimates are recorded in the period in which they become known.  Actual results could differ materially from
those estimates.

Principles of Consolidation

The consolidated financial statements include the accounts of Rhythm Pharmaceuticals, Inc. and its wholly-owned

subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

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Table of Contents

Off-Balance Sheet Risk and Concentrations of Credit Risk

Financial instruments, which potentially subject the Company to significant concentration of credit risk, consist
primarily of cash and cash equivalents and short-term investments, which are maintained at two federally insured financial
institutions.  The  deposits  held  at  these  two  institutions  are  in  excess  of  federally  insured  limits.  The  Company  has  not
experienced any losses in such accounts and management believes that the Company is not exposed to significant credit
risk due to the financial position of the depository institutions in which those deposits are held. The Company has no off-
balance sheet risk, such as foreign exchange contracts, option contracts, or other foreign hedging arrangements.

Segment Information

Operating segments are defined as components of an entity about which separate discrete information is available
for evaluation by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and
in  assessing  performance.  The  Company  considers  its  chief  executive  officer,  or  CEO,  as  its  chief  operating  decision
maker.  The Company and the CEO view the Company’s operations and manages its business in one operating segment
operating exclusively in the United States.

Cash and Cash Equivalents

The  Company  considers  all  highly  liquid  investments  with  original  or  remaining  maturity  from  the  date  of
purchase of three months or less to be cash equivalents. Cash and cash equivalents includes bank demand deposits, U.S.
treasury bills and money market funds that invest primarily in U.S. government treasuries.

Short-term Investments

Short-term  investments  consist  of  investments  with  original  maturities  greater  than  90  days,  as  of  the  date  of
purchase. The Company has classified its investments with maturities beyond one year as short term, based on their highly
liquid  nature  and  because  such  marketable  securities  represent  the  investment  of  cash  that  is  available  for  current
operations. The Company considers its investment portfolio available-for-sale. Accordingly, these investments are recorded
at  fair  value,  which  is  based  on  quoted  market  prices.  Unrealized  gains  and  losses  are  reported  as  a  component  of
accumulated  other  comprehensive  income  (loss)  in  stockholders’  equity.    To  the  extent  the  amortized  cost  basis  of  the
available-for-sale debt securities exceeds the fair value, management assesses the debt securities for credit loss; however,
management considers the risk of credit loss to be minimized by the Company's policy of investing in financial instruments
issued by highly-rated financial institutions. When assessing the risk of credit loss, management considers factors such as
the severity and the reason of the decline in value (i.e., any changes to the rating of the security by a rating agency or other
adverse  conditions  specifically  related  to  the  security)  and  management's  intended  holding  period  and  time  horizon  for
selling.  During  the  years  ended  December  31,  2020,  2019,  and  2018,  the  Company  did  not  recognize  any  credit  losses
related to its available-for-sale debt securities. Further, as of December 31, 2020 and 2019, the Company did not record an
allowance for credit losses related to its available-for-sale debt securities.

Restricted Cash

Restricted  cash  consists  of  security  deposits  in  the  form  of  letters  of  credit  placed  in  separate  restricted  bank
accounts as required under the terms of the Company’s lease arrangement for its corporate office in Boston, Massachusetts
and the Company’s corporate travel credit cards.

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Table of Contents

Prepaid Expenses and Other Current Assets

Prepaid  expenses  and  other  current  assets  consist  primarily  of  costs  incurred  in  advance  of  services  being
received,  including  services  related  to  clinical  trial  programs.    Prepaid  expenses  and  other  current  assets  consists  of  the
following:

Prepaid research and development costs
Other current assets

Prepaid expenses and other current assets

Property and Equipment

Property and Equipment consists of the following:

Leasehold improvements
Office equipment
Computers and software
Furniture, fixtures and equipment

Less accumulated depreciation and amortization
Property and equipment, net

* Shorter of asset life or lease term.

December 31, 

2020

2019

$

$

5,828
3,048
8,876

$

$

6,438
3,507
9,945

Useful 
Life
*
5 years
3 years
5 years

December 31, 

2020

2019

$

$

2,705
70
625
1,237
4,637
(1,442)
3,195

$

$

2,705
70
411
1,237
4,423
(752)
3,671

Depreciation and amortization expense for the years ended December 31, 2020, 2019 and 2018 was $690, $834

and $442, respectively.

Property and equipment are recorded at cost. Depreciation and amortization is calculated using the straight-line
method over the estimated useful lives of the assets. Upon disposal, retirement or sale, the cost of assets disposed of and
the related accumulated depreciation are removed from the accounts and any resulting gain or loss is included in the results
of operations. Expenditures for repairs and maintenance that do not improve or extend the lives of the respective assets are
charged to expense as incurred.

Fair Value Measurements

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction 
between market participants at the measurement date.  Financial assets and liabilities carried at fair value are classified and 
disclosed in one of the following three categories:

Level 1 — Quoted market prices in active markets for identical assets or liabilities.

Level 2 — Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities;

quoted prices in markets that are not active; or other inputs that are observable or can be corroborated
by observable market data for substantially the full term of the assets or liabilities.

Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair

value of the assets or liabilities.

The Company’s cash equivalents and marketable securities at December 31, 2020 and 2019 were carried at fair

value, determined according to the fair value hierarchy.  See Note 4 for further discussion.

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The  carrying  amounts  reflected  in  the  consolidated  balance  sheets  for  accounts  payable  and  accrued  expenses

approximate their fair values due to their short-term maturities at December 31, 2020 and 2019, respectively.

Government Grants

The  Company  obtained  an  Orphan  Products  Development  grant  entitled  “Phase  2  study  of  the  melanocortin  4
receptor agonist RM-493 for the treatment of Prader-Willi syndrome” in 36 patients. The grant was awarded by the Public
Health Service, or PHS, Food and Drug Administration. The PHS grant is for a total of $999 and is effective July 2015
through June 2018 for reimbursement of expenses relating to the Phase 2 Prader-Willi Study.

The  Company  recognizes  government  grants  upon  the  determination  that  it  will  comply  with  the  conditions
attached to the grant arrangement and the grant will be received. Government grants are recognized in the statements of
operations  on  a  systematic  basis  over  the  periods  in  which  the  Company  recognizes  the  related  costs  for  which  the
government  grant  is  intended  to  compensate.  Government  grants  for  research  and  development  efforts  are  deducted  in
reporting  the  related  expense  in  the  statement  of  operations.  Government  grant  income  received  during  the  year  ended
December 31, 2018 of $210 is included as a deduction to research and development expense in the consolidated statements
of operations and comprehensive loss. No grant income was received during the years ended December 31, 2020 or 2019.  

Research and Development Expenses

Costs incurred in the research and development of the Company’s products are expensed to operations as incurred.
Research and development expenses consist of costs incurred in performing research and development activities, including
salaries  and  benefits,  facilities  costs,  overhead  costs,  contract  services  and  other  outside  costs.  The  value  of  goods  and
services received from contract research organizations, or CROs, or contract manufacturing organizations, or CMOs, in the
reporting period are estimated based on the level of services performed and progress in the period for which the Company
has not yet received an invoice from the supplier.  When evaluating the adequacy of the accrued liabilities, the Company
analyzes  progress  of  the  studies  or  clinical  trials,  including  the  phase  or  completion  of  events,  invoices  received  and
contracted  costs.  Significant  judgments  and  estimates  are  made  in  determining  the  accrued  balances  at  the  end  of  any
reporting  period.  Actual  results  could  differ  from  the  Company’s  estimates.  The  Company’s  historical  accrual  estimates
have not been materially different from the actual costs.

Nonrefundable  advance  payments  for  goods  or  services  to  be  received  in  the  future  for  use  in  research  and
development activities are recorded as prepaid expenses, and expensed as the related goods are delivered or the services are
performed.

Income Taxes

The  Company  is  taxed  as  a  C  corporation  for  federal  income  tax  purposes.  Income  taxes  for  the  Company  are
recorded in accordance with FASB ASC Topic 740, Income Taxes (“ASC 740”), which provides for deferred taxes using an
asset and liability approach. Income taxes have been calculated on a separate tax return basis.

The Company accounts for income taxes under the asset and liability method, which requires the recognition of
deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial
statements. Under this method, the Company determines deferred tax assets and liabilities on the basis of the differences
between the financial statement and tax bases of assets and liabilities by using enacted tax rates in effect for the year in
which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is
recognized in income in the period that includes the enactment date.  The Company recognizes deferred tax assets to the
extent  that  it  believes  that  these  assets  are  more  likely  than  not  to  be  realized.  In  making  such  a  determination,  the
Company considers all available positive and negative evidence, including future reversals of existing taxable temporary
differences,  projected  future  taxable  income,  tax-planning  strategies,  and  results  of  recent  operations.  If  the  Company
determines that it would be able to realize its deferred tax assets in the future in excess of their net recorded amount, it
would  make  an  adjustment  to  the  deferred  tax  asset  valuation  allowance,  which  would  reduce  the  provision  for  income
taxes.

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The Company records uncertain tax positions in accordance with ASC 740 on the basis of a two-step process in
which  (1)  it  determines  whether  it  is  more  likely  than  not  that  the  tax  positions  will  be  sustained  on  the  basis  of  the
technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, the
Company recognizes the largest amount of tax benefit that is more than 50% likely to be realized upon ultimate settlement
with the related tax authority.

The  Company  recognizes  interest  and  penalties  related  to  unrecognized  tax  benefits  on  the  income  tax  expense
line in the accompanying consolidated statement of operations. As of December 31, 2020, no accrued interest or penalties
are included on the related tax liability line in the consolidated balance sheet.

Net Loss Per Share

Basic  net  loss  per  share  is  computed  by  dividing  net  loss  by  the  weighted  average  number  of  common  shares
outstanding during the period, without consideration of potential dilutive securities. Diluted net loss per share is computed
by  adjusting  the  weighted  average  shares  outstanding  for  the  potential  dilutive  effects  of  common  stock  equivalents
outstanding during the period calculated in accordance with the treasury stock method. For purposes of the diluted net loss
per share calculation, stock options and restricted stock units are considered to be common stock equivalents but have been
excluded from the calculation of diluted net loss per share, as their effect would be anti-dilutive for all periods presented.
Therefore, basic and diluted net loss per share were the same for all periods presented.

The following table includes the potential common shares, presented based on amounts outstanding at each period
end, that were excluded from the computation of diluted net loss per share due to their anti-dilutive effect, for the periods
indicated:

Stock options
Restricted stock units

Potential common shares

Comprehensive Income (Loss)

2020
5,199,235
176,537
5,375,772

Year Ended
December 31, 
2019
3,428,497

—  

3,428,497

2018
2,616,530
—
2,616,530

Comprehensive income (loss) represents the net change in stockholders’ equity during a period from sources other
than  transactions  with  shareholders.  As  reflected  in  the  accompanying  consolidated  statements  of  operations  and
comprehensive loss, our comprehensive loss is comprised of net losses and unrealized gains and losses on marketable debt
securities.  These changes in equity are reflected net of tax.

Patent Costs

Costs  to  secure  and  defend  patents  are  expensed  as  incurred  and  are  classified  as  general  and  administrative

expenses. Patent costs were $524, $472 and $637 for the years ended December 31, 2020, 2019 and 2018, respectively.

Subsequent Events

The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of
the financial statements to provide additional evidence for certain estimates or to identify matters that require additional
disclosure. Subsequent events have been evaluated as required.

Application of New or Revised Accounting Standards

From time to time, new accounting pronouncements are issued by the FASB and adopted by the Company as of
the specified effective date. Unless otherwise discussed, the Company believes that the impact of recently issued standards
that are not yet effective will not have a material impact on its financial position or results of operations upon adoption.

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Effective  January  1,  2019  the  Company  adopted  FASB  ASU  2016-02,  Leases  (Topic  842)  (“ASU  2016-
02”).    ASU  2016-02  requires  lessees  to  recognize  a  right-of-use  (“ROU”)  asset  and  lease  liability  for  most  lease
arrangements. The new standard is effective for annual reporting periods beginning after December 15, 2018. The original
guidance  required  application  on  a  modified  retrospective  basis  with  the  earliest  period  presented.    In  August  2018,  the
FASB  issued  ASU  2018-11,  Targeted  Improvements  to  ASC  842,  which  included  an  option  to  not  restate  comparative
periods in transition and elect to use the effective date of ASC 842, as the date of initial application of transition, which the
Company has elected. In addition, the Company elected the package of practical expedients permitted under the transition
guidance within the new standard which allowed us to carry forward the historical lease classification.  As a result of the
adoption of ASC 842 on January 1, 2019, the Company recorded both an operating lease right-of-use asset of $3,265 and a
lease liability of $3,636.  Additional information and disclosures required by this new standard are contained in Note 5,
Right Of Use Asset and Lease Liability.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses-Measurement of Credit Losses
on Financial Instruments, which has been subsequently amended by ASU No. 2018-19, ASU No. 2019-04, ASU No. 2019-
05, ASU No. 2019-10, ASU No. 2019-11 and ASU No. 2020-03, or ASU 2016-13. The provisions of ASU 2016-13 modify
the impairment model to utilize an expected loss methodology in place of the currently used incurred loss methodology and
require a consideration of a broader range of reasonable and supportable information to inform credit loss estimates. Since
the  Company  ceased  to  be  an  emerging  growth  company  as  of  December  31,  2020,  the  Company  adopted  the  standard
during the fourth quarter of 2020 and applied the modified retrospective method of adoption to the Company’s financial
statements  as  of  January  1,  2020.    Based  on  the  composition  of  the  investment  portfolio  as  of  the  adoption  date  and  at
December  31,  2020  ,  the  adoption  of  this  standard  did  not  have  a  material  impact  on  the  Company’s  financial  position,
results of operations and cash flows for the year ended December 31 2020 and no adjustment was required to be recorded
to the opening retained earnings balance as of January 1, 2020.

In December 2019, the FASB issued ASU 2019-12, Income Taxes-Simplifying the Accounting for Income Taxes,
or  ASU  2019-12.  ASU  2019-12  eliminates  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. The new guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax
laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The standard
is  effective  for  annual  periods  beginning  after  December  15,  2020  and  interim  periods  within,  with  early  adoption
permitted.  Adoption  of  the  standard  requires  certain  changes  to  be  made  prospectively,  with  some  changes  to  be  made
retrospectively. The Company does not expect the adoption of ASU 2019-12 to have a material impact on the Company’s
financial position, results of operations and cash flows.

3. Accrued Expenses

Accrued expenses consisted of the following:

Research and development costs
Professional fees
Payroll related
Other

Accrued expenses

4. Fair Value of Financial Assets

December 31, 
2020

December 31, 
2019

$

$

5,815
648
5,916
180
12,559

$

$

8,059
1,439
3,655
377
13,530

As of December 31, 2020 and 2019, the carrying amount of cash and cash equivalents and short-term investments
was  $172,792  and  $292,459,  respectively,  which  approximates  fair  value.  Cash  and  cash  equivalents  and  short-term
investments  includes  investments  in  U.S.  treasury  securities  and  money  market  funds  that  invest  in  U.S.  government
securities  that  are  valued  using  quoted  market  prices.  Accordingly,  money  market  funds  and  government  funds  are
categorized  as  Level  1.    The  financial  assets  valued  based  on  Level  2  inputs  consist  of  corporate  debt  securities  and
commercial paper, which consist of investments in highly-rated investment-grade corporations.

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The  following  tables  present  information  about  the  Company's  financial  assets  measured  at  fair  value  on  a

recurring basis and indicate the level of the fair value hierarchy utilized to determine such fair values:

Assets:
Cash Equivalents:

Corporate Debt Securities and Commercial Paper
U.S. Treasury Securities and Money Market Funds

Marketable Securities:

Corporate Debt Securities and Commercial Paper

Total

Assets:
Cash Equivalents:

Corporate Debt Securities and Commercial Paper
Money Market Funds
Marketable Securities:

Corporate Debt Securities and Commercial Paper

Total

Marketable Securities

Level 1

Fair value Measurements as of
December 31, 2020 using:
Level 3
Level 2

Total

— $

63,182

36,242
—

—
63,182

71,938
108,180

$

$

$

— $
—

36,242
63,182

—
— $

71,938
171,362

Level 1

Fair value Measurements as of
December 31, 2019 using:
Level 3
Level 2

Total

— $

53,014

8,885

$
—  

— $
—  

8,885
53,014

—
53,014

230,165
239,050

$

$

—
— $

230,165
292,064

$

$

$

$

The following tables summarize the Company's marketable securities:

Assets

Corporate debt securities and commercial paper (due within
1 year)

Assets

Corporate debt securities and commercial paper (due within
1 year)

5. Right Of Use Asset and Lease Liability

Amortized
Cost

December 31, 2020

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Fair
Value

$
$

71,895
71,895

$
$

43
43

$
$

— $
— $

71,938
71,938

Amortized
Cost

December 31, 2019

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Fair
Value

$ 230,155
$ 230,155

$
$

54
54

$
$

(44)
(44)

$
$

230,165
230,165

The Company has a material operating lease for its head office facility and other immaterial operating leases for
certain equipment.  The Company’s office lease has a remaining lease term of 4.6 years.  The Company measured the lease
liability associated with the office lease using a discount rate of 10% at inception.  The Company estimated the incremental
borrowing rate for the leased asset based on a range of comparable interest rates the Company would incur to borrow an
amount equal to the lease payments on a collateralized basis over a similar term in a similar economic environment.  As of
December 31, 2020, the Company has not entered into any lease arrangements classified as a finance lease.

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Under ASC 842, the Company determines, at the inception of the contract, whether the contract is or contains a
lease  based  on  whether  the  contract  provides  the  Company  the  right  to  control  the  use  of  a  physically  distinct  asset  or
substantially all of the capacity of an asset. Leases with an initial noncancelable term of twelve months or less that do not
include  an  option  to  purchase  the  underlying  asset  that  the  Company  is  reasonably  certain  to  exercise  are  classified  as
short-term  leases.   The  Company  has  elected  as  an  accounting  policy  to  exclude  from  the  consolidated  balance  sheets  a
right of use asset and lease liability for short-term leases.

Upon  adoption  of  ASC  842,  the  Company  elected  the  transition  relief  package,  permitted  within  the  standard,
pursuant  to  which  the  Company  did  not  reassess  the  classification  of  existing  leases,  whether  any  expired  or  existing
contracts contain a lease, and whether existing leases have any initial direct costs. The Company also elected the practical
expedient of not separating lease components from non-lease components for all leases. There was no cumulative-effective
adjustment to the opening balance of retained earnings. The Company reviews all material contracts for embedded leases to
determine if they have a right-of-use asset.

The Company recognizes rent expense on a straight-line basis over the lease period. The depreciable life of assets
and  leasehold  improvement  are  limited  by  the  expected  lease  term,  unless  there  is  a  transfer  of  title  or  purchase  option
reasonably certain of exercise.

As a result of the adoption of ASC 842 on January 1, 2019, the Company recorded both an operating lease right-
of-use asset of $3,265 and a lease liability of $3,636. The standard did not materially impact the consolidated statements of
cash flows and had no impact on the consolidated statements of operations.

The Company’s office lease includes both lease and non-lease components.  Non-lease components relate to real
estate  taxes,  insurance,  operating  expenses  and  common  area  maintenance,  which  are  usually  billed  at  actual  amounts
incurred proportionate to the Company’s rented square feet of the building.  These non-lease components are expensed by
the Company as they are incurred and are not included in the measurement of the lease liability.

The Company’s corporate headquarters is located in Boston, Massachusetts.  This facility houses the Company’s
research,  clinical,  regulatory,  commercial  and  administrative  personnel.    The  Company’s  lease  agreement  commenced
May  2019  and  has  a  term  of  six  years  with  a  five-year  renewal  option  to  extend  the  lease.  As  of  January  1,  2019,  the
Company did not included the five-year renewal option to extend the lease in its measurement of the ROU asset or lease
liability. Rent expense, or operating lease costs, for the years ended December 31,  2020, 2019 and 2018 were $551, $629
and $359, respectively.

Supplemental cash flow information related to the Company’s lease for the year ended December 31, 2020,

includes cash payments of $786 used in the measurement of its operating lease liability.

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The following table presents the maturities of the Company’s operating lease liability related to office space as of

December 31, 2020, all of which is under a non-cancellable operating lease:

2021
2022
2023
2024
2025
Thereafter
Total operating lease payments

Less: imputed interest

Total operating lease liability

6. Common Stock

Common Stock

$

     Operating Lease
802
818
834
851
502
—
3,807
721
3,086

$

On  April  3,  2018,  in  association  with  the  Takeda  license  agreement,  the  Company  issued  223,544  shares  of

common stock.  See Note 8 for further discussion.

On June 25, 2018 the Company completed a public offering of 6,591,800 shares of common stock at an offering
price of $26.42 per share, which included the exercise in full by the underwriters of their option to purchase up to 859,800
additional  shares  of  common  stock.  The  Company  received  net  proceeds  of  $162,878  after  deducting  underwriting
discounts, commissions and offering expenses.

On  October  18,  2019  the  Company  completed  a  public  offering  of  9,324,324  shares  of  common  stock  at  an
offering price of $18.50 per share, which included the exercise in full by the underwriters of their option to purchase up to
1,216,216  additional  shares  of  common  stock.  The  Company  received  net  proceeds  of  $161,352  after  deducting
underwriting discounts, commissions and offering expenses.

7. Stock-based Compensation

2017 Equity Incentive Plan

The  2017  Plan  provides  for  the  grant  of  incentive  and  non-qualified  stock  options,  stock  appreciation  rights,
performance units, restricted stock, restricted stock units and stock grants to employees, consultants, advisors and directors
of us or our affiliates, as determined by the board of directors.  The number of shares authorized under the 2017 Plan will
be  increased  each  January  1,  commencing  on  January  1,  2018  and  ending  on  (and  including)  January  1,  2027,  by  an
amount equal to 4% of the outstanding shares of stock outstanding as of the end of the immediately preceding fiscal year.
On January 1, 2021, 2020 and 2019, 1,769,436, 1,759,870 and 1,376,429 shares, respectively, were added to the 2017 Plan.
 Notwithstanding the foregoing, the board of directors may act prior to January 1 for a given year to provide that there will
be no such January 1 increase in the number of shares authorized under the 2017 Plan for such year, or that the increase in
the  number  of  shares  authorized  under  the  2017  Plan  for  such  year  will  be  a  lesser  number  than  would  otherwise  occur
pursuant to the preceding sentence.  Shares of common stock issued upon exercise of stock options are generally issued
from new shares of the Company. The 2017 Plan provides that the exercise price of incentive stock options cannot be less
than 100% of the fair market value of the common stock on the date of the award for participants who own less than 10%
of the total combined voting power of stock of the Company, and not less than 110% for participants who own more than
10%  of  the  Company's  voting  power.  Awards  granted  under  the  2017  Plan  will  vest  over  periods  as  determined  by  the
Company's board of directors. For options granted to date, the exercise price equaled the fair value of the common stock as
determined by the board of directors on the date of grant.

As of December 31,  2020, an aggregate of 7,484,536 shares of common stock were authorized for issuance under

the 2017 Plan, of which a total of approximately 2,108,764 shares of common stock remained available for future

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awards.  In  addition,  a  total  of  5,375,772  shares  of  common  stock  reserved  for  issuance  were  subject  to  currently
outstanding stock options and restricted stock units granted under the Plan.

The Company estimates the fair value of stock option awards to employees and non-employees using the Black-
Scholes option-pricing model, which requires the input of subjective assumptions, including (a) the expected volatility of
the underlying common stock, (b) the expected term of the award, (c) the risk-free interest rate, and (d) expected dividends.
Due  to  the  lack  of  a  public  market  for  the  trading  of  its  common  stock  and  a  lack  of  company-specific  historical  and
implied volatility data, the Company has based its estimate of expected volatility on the historical volatility of a group of
companies in the pharmaceutical and biotechnology industries in a similar stage of development as the Company that are
publicly traded. For these analyses, the Company selected companies with comparable characteristics to its own including
enterprise value, risk profiles and with historical share price information sufficient to meet the expected life of the stock-
based  awards.    The  Company  computes  the  historical  volatility  data  using  the  daily  closing  prices  for  the  selected
companies' shares during the equivalent period of the calculated expected term of its stock-based awards. During 2020, the
Company began to estimate its volatility by using a blend of its stock price history for the length of time it has market data
for its stock and the historical volatility of similar public companies for the expected term of each grant.  The Company
will  continue  to  apply  this  process  until  a  sufficient  amount  of  historical  information  regarding  the  volatility  of  its  own
stock price becomes available.

The Company estimated the expected life of its employee stock options using the “simplified” method, whereby,
the  expected  life  equals  the  average  of  the  vesting  term  and  the  original  contractual  term  of  the  option.  The  risk-free
interest rates for periods within the expected life of the option are based on the U.S. Treasury yield curve in effect during
the period the options were granted.  We have elected to account for forfeitures as they occur.

The grant date fair value of awards subject to service-based vesting is recognized ratably over the requisite service
period, which is generally the vesting period of the respective awards. The Company's stock option awards typically vest
over  a  service  period  that  ranges  from  one  to  four  years  and  includes  awards  with  one  year  cliff  vesting  followed  by
ratable monthly and quarterly vesting thereafter and ratable monthly and quarterly vesting beginning on the grant date.

During  the  years  ended  December  31,  2020,  2019  and  2018,  the  Company  granted  2,546,075,  1,445,200  and
1,218,790 stock option awards to certain directors, employees and non-employees, respectively.  Using the Black-Scholes
option  pricing  model,  the  weighted-average  grant  date  fair  value  relating  to  outstanding  stock  options  granted  under  the
Company’s stock option plan during the years ended December 31, 2020, 2019 and 2018 was $13.25, $17.19 and $17.27,
respectively. The total intrinsic value of stock options exercised during the years ended December 31, 2020, 2019 and 2018
was $2,661, $3,844 and $7,980, respectively.

The fair value of stock options granted to employees and directors was estimated at the date of grant using the

Black-Scholes option pricing model with the following weighted-average assumptions:

Risk‑free interest rate
Expected term (in years)
Expected volatility
Expected dividend yield

Year ended
December 31, 

2019

2.40 %
6.07
66.03 %
—

2020

0.76 %
6.08
70.67 %
—

2018

2.73 %
5.89
62.21 %
—

The  Company  early  adopted  ASU  2018-07,  Improvements  to  Nonemployee  Share-Based  Payment  Accounting
(Topic  718),  in  July  2018.  The  guidance  was  adopted  using  the  modified-retrospective  approach,  which  requires  that
unsettled equity-classified awards for which a measurement date has not been established be measured using the adoption

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date fair value.  The adoption of this ASU did not have a material impact on the Company's financial position or results of
operations.

Prior to the adoption of ASU 2018-07 options granted to non-employees used an expected term of 10 years, which
is  the  contractual  term  of  each  option.       All  other  assumptions  used  to  calculate  the  grant  date  fair  value  are  generally
consistent with the assumptions used for options granted to employees.  

A summary of the Company's stock option activity for the year ended December 31, 2020 is as follows:

Outstanding as of December 31, 2019

Granted
Exercised
Cancelled

Outstanding as of December 31, 2020
Options vested and expected to vest as of December 31, 2020
Options exercisable at December 31, 2020

Number of
Options
3,428,497
2,546,075
(184,098)
(591,239)
5,199,235
5,199,235
2,157,915

$

$
$
$

Weighted-
Average
Exercise
Price

     Weighted‑
Average
Remaining
Contractual
Term

21.17
21.22
8.07
24.34
21.30
21.30
18.95

7.94

$
—  
—  
—  
$
$
$

7.57
7.57
5.47

Aggregate
Intrinsic
Value

—
—
2,661
—
45,233
45,233
24,218

A summary of the Company's restricted stock unit activity for the year ended December 31, 2020 is as follows:

Unvested as of December 31, 2019

Granted
Vested
Cancelled

Unvested as of December 31, 2020

Number of
RSU's

— $

209,912
(25,000)
(8,375)
176,537

$

Weighted-
Average
Grant Date
Fair Value

—
19.77
22.30
17.87
19.50

As of December 31, 2020, the aggregate intrinsic value of non-vested RSUs was $5,248.

The following table summarizes the classification of the Company's stock-based compensation expenses related to
stock  options,  restricted  stock  units  and  the  employee  stock  purchase  plan  recognized  in  the  Company's  consolidated
statements of operations and comprehensive loss.

Research and development
Selling, general, and administrative

Total

F-19

Year Ended
December 31, 
2019
5,163
6,712
$ 11,875

$

2018
2,793
3,597
6,390

$

$

2020
$ 6,055
  11,400
$ 17,455

    
    
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
 
Table of Contents

Stock-based compensation expense by award type recognized during the years ended December 31, 2020, 2019

and 2018 was as follows:

Stock options
Employees stock purchase plan
Restricted stock units

Total

2020
$ 15,915
180
1,360
$ 17,455

Year Ended
December 31, 
2019
$ 11,667
208
—  
$

$ 11,875

$

2018
6,241
65
84
6,390

During 2020 and 2019, there were certain awards subject to modification accounting. Per terms of separation with
a  former  employee,  the  employee’s  stock  option  awards  were  amended  to  provide  for  accelerated  vesting  and  extended
time to exercise vested options.  As a result, the Company recognized incremental expense for the stock option awards of
$2,880 and $56, respectively.

As  of  December  31,  2020,  the  Company  has  unrecognized  compensation  cost  of  $39,111  related  to  non-vested
employee,  non-employee  and  director  stock  option  awards  that  is  expected  to  be  recognized  over  a  weighted-average
period  of  2.83  years.    The  Company  has  unrecognized  compensation  cost  of  $2,640  related  to  non-vested  employee
restricted stock unit awards that is expected to be recognized over a weighted-average period of 2.52 years.

2017 Employee Stock Purchase Plan

The  Company  has  a  2017  Employee  Stock  Purchase  Plan,  or  the  2017  ESPP,  which  became  effective  in
connection with the completion of the Company’s IPO in October 2017.  As of December 31, 2020, a total of 1,000,993
shares  of  common  stock  were  reserved  for  issuance  under  the  2017  ESPP.  In  addition,  the  number  of  shares  authorized
under the 2017 ESPP will be increased each January 1, commencing on January 1, 2019 and ending on (and including)
January 1, 2027, by an amount equal to the lesser of 1% of outstanding shares as of the end of the immediately preceding
fiscal  year.  On  January  1,  2020  and  2019,  439,968  and  344,107  shares,  respectively,  were  added  to  the  2017  ESPP.
 Notwithstanding the foregoing, the board of directors may act prior to January 1 of a given year to provide that there will
be no such January 1 increase in the number of shares authorized under the 2017 ESPP for such year, or that the increase in
the number of shares authorized under the 2017 ESPP for such year will be a lesser number than would otherwise occur
pursuant to the preceding sentence.  The board of directors elected not to increase the pool on January 1, 2021.  During the
year ended December 31, 2020, 30,052 shares were issued under this plan.

8. Significant Agreements

License Agreements

Pursuant  to  a  license  agreement  with  Ipsen  Pharma,  S.A.S.,  or  Ipsen,  the  Company  has  an  exclusive,
sublicensable,  worldwide  license  to  certain  patents  and  other  intellectual  property  rights  to  research,  develop,  and
commercialize compounds that were discovered or researched by Ipsen in the course of conducting its MC4R program or
that  otherwise  were  covered  by  the  licensed  patents.  Under  the  terms  of  the  setmelanotide  Ipsen  license  agreement,
assuming  that  setmelanotide  is  successfully  developed,  receives  regulatory  approval  and  is  commercialized,  Ipsen  may
receive aggregate payments of up to $40,000 upon the achievement of certain development and commercial milestones and
royalties on future product sales in the mid-single digits. Substantially all of such aggregate payments of up to $40,000 are
for milestones that may be achieved no earlier than first commercial sale of setmelanotide. In the event that the Company
executes  a  sublicense  agreement,  it  shall  make  payments  to  Ipsen,  depending  on  the  date  of  such  sublicense  agreement,
ranging from 10% to 20% of all revenues actually received under such sublicense agreement.

The Company has recorded milestone expenses related to this license agreement of $3,000 and $1,000 during the

years ended December 31, 2020 and 2018, respectively.  The expenses were recorded as research and development

F-20

    
 
 
Table of Contents

expenses  when  the  milestone  criterias  were  met  in  full.    No  milestone  expenses  were  recorded  during  the  year  ended
December 31, 2019.

In  January  2016,  the  Company  entered  into  a  license  agreement  with  Camurus  AB,  or  Camurus,  for  the  use  of
Camurus' drug delivery technology. The contract includes a non-refundable and non-creditable signing fee of $500. The
Camurus  agreement  also  includes  up  to  $7,750  in  one-time,  non-refundable  development  milestones  achievable  upon
certain regulatory successes. The Company is also required to pay to Camurus, mid to mid-high single digit royalties, on a
product-by-product  and  country-by-country  basis  of  annual  net  sales,  until  the  later  of  (i)  10  years  after  the  date  of  first
commercial sale of such product in such country; or (ii) the expiration of the last to expire valid claim of all licensed patent
rights  in  such  country  covering  such  product.  The  Company  is  also  required  to  pay  one-time,  non-refundable,  non-
creditable  sales  milestones  upon  the  achievement  of  certain  sales  levels  for  such  product  that  cannot  be  in  excess  of
$57,000.

In  March  2018,  the  Company  entered  into  a  license  agreement  with  Takeda,  for  the  rights  of  a  program  that
includes the clinical candidate RM-853, which is a GOAT inhibitor, which is currently in preclinical development for PWS.
  Pursuant  to  the  license  agreement  the  Company  was  required  to  pay  a  non-refundable  and  non-creditable  signing  fee,
which  the  Company  settled  by  issuing  on  April  3,  2018,  223,544  shares  of  common  stock  valued  at  $4,448.    Under  the
terms  of  the  license  agreement,  assuming  that  RM-853  is  successfully  developed,  receives  regulatory  approval  and  is
commercialized, the Company is also required to pay up to $70,000 in one-time, non-refundable development milestone
payments upon the  achievement of certain clinical and regulatory milestones. The Company is also required to pay up to
$70,000 in one-time, non-refundable, non-creditable sales milestone payments upon the achievement of certain sales levels.
  The  Company  is  also  required  to  pay  to  Takeda,  mid  to  mid-high  single  digit  royalties  (subject  to  certain  potential
reductions over time), on a product-by-product and country-by-country basis of annual net sales, of each product in such
country, beginning on the first commercial sale of a product in such country, and continuing until the latest of (i) 10 years
after the date of first commercial sale of such product in such country; or (ii) the expiration of the last to expire valid claim
of a Takeda patents covering the composition or use of such product in such country; or (iii) the expiration of all regulatory
exclusivity for such product in such country. The Company recorded the fair value of the common stock to be issued to the
licensors as research and development expense, as the license does not have a future alternative use, in accordance with
ASC Topic 730, Research and Development.

9. Commitments and Contingencies

Legal Proceedings

The  Company,  from  time  to  time,  may  be  party  to  litigation  arising  in  the  ordinary  course  of  business.  The
Company was not subject to any material legal proceedings during the years ended December 31, 2020, 2019 and 2018 and
to the best of its knowledge, no material legal proceedings are currently pending or threatened.

Other

The  Company  is  party  to  various  agreements,  principally  relating  to  licensed  technology,  that  require  future
payments relating to milestones that may be met in subsequent periods, or royalties on future sales of specified products.
 See Note 8 for discussion of these arrangements.  Additionally, the Company is party to various contracts with CROs and
CMOs that generally provide for termination on notice, with the exact amounts in the event of termination to be based on
the timing of the termination and the terms of the agreement.

Based  on  the Company’s  current  development  plans as of December 31, 2020,  potential payments due to third
parties  during    the    next    12    months    from    the    filing    of    this    Annual    Report  on    Form    10-K  are  estimated  be
approximately  $9,000  in  commercial  milestones,  in  connection  with  our  license  agreements.  These  milestones  generally
become  due  and  payable  upon achievement of such milestones or sales.  When the  achievement  of  these  milestones or
sales have not occurred, such contingencies are not recorded in the Company’s consolidated financial statements.  

F-21

Table of Contents

10. Related-Party Transactions

Expenses paid directly to consultants and vendors considered to be related parties amounted to $3,221, $2,489 and
$2,005 for the years ended December 31, 2020, 2019 and 2018, respectively. Outstanding payments due to these related
parties as of December 31, 2020 and 2019 were $187 and $264, respectively and were included within accounts payable on
the balance sheet.

11. Income Tax

For the years ended December 31, 2020, 2019 and 2018 the Company did not have a current or deferred income
tax expense or benefit as the entity has incurred losses since inception and has provided a full valuation allowance against
its deferred tax assets.

A reconciliation of the income tax benefit at the federal statutory tax rate to the Company's effective income tax

rate is as follows:

Statutory tax rate
State tax, net of federal benefit
Research and development credit
Orphan drug credit
Tax law change
Stock compensation
Investor instrument revaluation
Other
Change in valuation allowance
Effective tax rate

As of
December 31, 
2019

2018

6.32 %  
1.46 %  
2.40 %  

2020
21.00 %   21.00 % 21.00 %
6.75 % 6.90 %
2.49 % 1.52 %
1.85 % 1.95 %
— %
(0.10)% 0.46 %
— %
0.20 % 0.05 %
(30.35)%   (32.19)% (31.88)%
— %

— %   — %

— %   — %

— %   — %

(0.30)%  

(0.53)%  

The principal components of the Company's deferred tax assets and liabilities are as follows:

Deferred tax assets:

Net operating loss carryforwards
Research and development credits
Orphan drug credit
Capitalized license fee
Stock-based compensation
Accrued expenses and other

Total deferred tax assets
Valuation allowance
Net deferred tax assets
Deferred tax liabilities:

Operating lease right-of-use asset and other

Total deferred tax liabilities

As of
December 31, 

2020

2019

$ 102,367
10,347
10,110
2,492
6,621
2,267
134,204
(133,596)
608

$ 71,524
7,876
6,889
1,734
3,628
2,006
93,657
(92,943)
714

(608)
(608)

$

(714)
(714)

$

ASC  740  requires  a  valuation  allowance  to  reduce  the  deferred  tax  assets  reported  if,  based  on  the  weight  of
available evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. After
consideration of all the evidence, both positive and negative, the Company has recorded a full valuation allowance against
its deferred tax assets at December 31, 2020 and 2019, because the Company's management has determined that is it more
likely  than  not  that  these  assets  will  not  be  realized.  The  increase  in  the  valuation  allowance  of  $40,653  in  2020  and
$45,264 in 2019 primarily relates to the net loss incurred by the Company during each period.

F-22

 
 
    
    
  
  
 
 
 
 
 
 
 
 
 
 
    
    
 
   
  
 
 
 
 
 
 
 
 
 
 
Table of Contents

As of December 31, 2020, the Company had federal and state net operating loss carryforwards of approximately
$382,314  and  $351,187,  respectively,  which  are  available  to  reduce  future  taxable  income.  The  net  operating  loss
carryforwards expire at various times beginning in 2033 for federal and state purposes.  Of the federal net operating loss
carryforwards at December 31, 2020, $309,147 can be carried forward indefinitely.

As of December 31, 2020, the Company had federal and state research tax credits of approximately $8,115 and
$2,826, respectively, which may be used to offset future tax liabilities. Additionally, as of 2020, the Company had a federal
orphan drug credit related to qualifying research of $10,110. These tax credit carryforwards will begin to expire at various
times beginning in 2033 for federal purposes and 2028 for state purposes.

The net operating loss and tax credit carryforwards are subject to review and possible adjustment by the Internal
Revenue Service and state tax authorities. Net operating loss and tax credit carryforwards may become subject to an annual
limitation in the event of certain cumulative changes in the ownership interest of significant stockholders over a three-year
period  in  excess  of  50%,  as  defined  under  Sections  382  and  383  of  the  Internal  Revenue  Code,  respectively,  as  well  as
similar  state  provisions  and  other  provisions  within  the  Internal  Revenue  Code.  This  could  limit  the  amount  of  tax
attributes that can be utilized annually to offset future taxable income or tax liabilities. The amount of the annual limitation
is  determined  based  on  the  value  of  the  Company  immediately  prior  to  the  ownership  change.  Subsequent  ownership
changes may further affect the limitation in future years.    

The Company has not recorded any reserves for uncertain tax positions as of December 31, 2020 and 2019. The
Company has not, as yet, conducted a study of research and development credit carryforwards. This study may result in an
adjustment to the Company's research and development credit carryforwards; however, until a study is completed and any
adjustment  is  known,  no  amounts  are  being  presented  as  an  uncertain  tax  position.  A  full  valuation  allowance  has  been
provided against the Company's research and development credits and, if an adjustment is required, this adjustment would
be offset by an adjustment to the valuation allowance. Thus, there would be no impact to the balance sheets or statements
of operations and comprehensive loss if an adjustment were required.  

In March 2020, the Coronavirus Aid, Relief, and Economic Security Act, the CARES Act, was signed into law.
The CARES Act includes provisions relating to several aspects of corporate income taxes. The CARES Act did not have a
significant impact on the Company’s provision for income taxes.

Interest and penalty charges, if any, related to unrecognized tax benefits will be classified as income tax expense
in the accompanying statements of operations and comprehensive loss. As of December 31, 2020 and 2019, the Company
had no accrued interest or penalties related to uncertain tax positions.

The Company is subject to examination by the U.S. federal, state and local income tax authorities for tax years
2013 forward. The Company is not currently under examination by the Internal Revenue Service or any other jurisdictions
for any tax years.

F-23

Table of Contents

12. Subsequent Events.

The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of
the financial statements to provide additional evidence for certain estimates or to identify matters that require additional
disclosure.  Subsequent  events  have  been  evaluated  as  required.  The  Company  has  evaluated  all  subsequent  events  and
determined  that  there  are  no  material  recognized  or  unrecognized  subsequent  events  requiring  disclosure,  other  than  as
disclosed with the above notes to these consolidated financial statements and below.

On January 5, 2021, the Company entered into a definitive agreement to sell its PRV, for $100,000.  The PRV was
granted to the Company by the U.S. FDA with the approval of IMCIVREE for chronic weight management in adult and
pediatric patients 6 years of age and older with obesity due to POMC, PCSK1 or LEPR deficiency confirmed by genetic
testing.  The sale closed on February 17, 2021.

On  February  9,  2021  the  Company  completed  a  public  offering  of  5,750,000  shares  of  common  stock  at  an
offering price of $30.00 per share, which included the exercise in full by the underwriters of their option to purchase up to
750,000  additional  shares  of  common  stock.  The  Company  received  approximately  $161,550  in  net  proceeds  after
deducting underwriting discounts, commissions and estimated offering expenses.

The  financial  statements  as  of  December  31,  2020,  including  share  and  per  share  amounts,  do  not  include  the

effects of the PRV sale or the February public offering.

F-24

Summary of Non-Employee Director Compensation Policy

Exhibit 10.5

Under the Company’s non-employee director compensation policy, all non-employee directors will be paid an
annual  retainer  fee  of  $45,000  and  such  additional  fees  as  are  set  forth  in  the  following  table.  All  payments  will  be
made quarterly in arrears.

Non-Employee Director
Lead Director
Non-Executive Chair
Chairman of the audit committee
Member of the audit committee (other than chairman)
Chairman of the compensation committee
Member of the compensation committee (other than chairman)
Chairman of the governance and nominating committee
Member of the governance and nominating committee (other than chairman)

  Annual Fee
$
$
$
$
$
$
$
$

25,000
30,000
20,000
10,000
15,000
7,500
10,000
5,000

Under the policy, each individual who is initially appointed or elected to the board of directors will be eligible
to receive an option to purchase up to 30,000 shares of our common stock under the 2017 Equity Incentive Plan on the
date he or she first becomes a non-employee director. These option grants will vest annually over a three-year period
from the date of grant, subject to continued service as a non-employee director through that vesting date. In addition,
on the date of the annual meeting of stockholders, each continuing non-employee director who has served on the board
of directors for a minimum of six months will be eligible to receive an option grant to purchase up to 15,000 shares of
our common stock, which will vest in full upon the earlier of the first anniversary of the date of grant or the date of the
next annual meeting of stockholders. The exercise price for each of these option grants will be equal to the fair market
value  of  our  common  stock  on  the  date  of  grant.  These  new  director  grants  and  annual  grants  will  be  subject  to
approval  by  our  board  of  directors  at  the  time  of  grant.  The  share  numbers  set  forth  herein  will  be  appropriately
adjusted for any split or recapitalization of the Company’s securities.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.14

rhythm

Rhythm Pharmaceuticals, Inc.
500 Boylston Street - 11th Floo!"
Boston, MA 02116
Main Telephone: 617-585-2090
www.rhythmtx.com

May 10, 2018

Simon Kelner

Dear Simon:

On  behalf  of  Rhythm  Pharmaceuticals,  Inc.,  (the  "Company"  or  "Rhythm"),  I  am  pleased  to  set  forth  below  the  terms  of  your
employment with the Company.

Employment. You will be  employed  as  Chief Human Resources  Officer, beginning on June 4, 2018 (the "Start Date"), reporting to
Keith  Gottesdiener,  CEO.  During  the  term  of  your  employment  with  the  Company,  you  will  be  responsible  for  performing  the  duties
associated with the position above or as the Company may otherwise assign to you. Your primary place of employment initially will be in
the  Company's  offices  located  in  Massachusetts;  however,  you  will  be  expected  to  travel  as  may  be  necessary  to  fulfill  your
responsibilities.  In the course of your employment  with the Company,  you will be subject to, and required to comply with, all Company
policies and all applicable laws and regulations.

Base  Salary.  During  your  employment,  your  salary  will  be  $310,000  annualized,  subject  to  all  required  and  elected  taxes  and  other
withholdings. Your salary may be adjusted from time to time in accordance with normal business practice and in the sole discretion of the
Company.

Annual Incentive Bonus.Following the end of each fiscal year and subject to the approval by the Company's Board of Directors in its
sole discretion, you will be eligible to earn an incentive bonus, based on your performance and the Company's performance, each during
the applicable fiscal year, if your employment continues in good standing on the date of payment of such incentive bonus.  Your target
annual incentive bonus opportunity shall be 35% of your annualized base salary.

Equity Grant. Subject  to and upon the approval  of the Board of Directors of the Company after your Start Date, the Company shall
grant to you a stock option  (the "Option")  under the Company's  2017 Equity Incentive Plan, as it may be amended from time to time
(the  "Plan"),  to  purchase  60,000  shares  (subject  to  any  adjustments    for  any  stock  splits,  stock  dividends,  reverse  stock  splits  or
recapitalizations that are effected at any time during the period commencing after the date of this offer letter and ending on the grant date
of the Option, the "Option Shares") of the Company's common stock, $0.001 par value per share (the "Common Stock"), at an exercise
price equal to fair market value of the Common Stock, as determined by the Board of Directors of the Company, on the date of the grant
of the Option (the "Grant

Simon Kelner, page 2
May 10, 2018

Date"). Promptly after the Grant Date, the Company and you shall execute and deliver to each other the Company's then standard form of
 stock option agreement, evidencing the Option  and the terms thereof. The Option shall be subject to, and governed by, the terms and
provisions  of  the Plan and your stock option agreement.

Subject  to  the  terms  and  conditions  set  forth  below  in  this  letter  of  employment  and  unless  the  Board  of  Directors  of  the
Company  shall  otherwise  determine  on  the  Grant  Date,  the  Option  shall  be  exercisable  for  twenty-five  percent  (25%)  of  the  Option
Shares  as  of  the  first  anniversary  of  your  Start  Date,  and  the  remainder  of  the  Option  Shares  shall  become  exercisable  thereafter  in  a
series of twelve (12) equal quarterly installments until such Option shall have become fully vested and exercisable.

Upon  termination  of  your  employment  with  the  Company,  you  may  exercise  the  Option  to  the  extent  then  outstanding  and
exercisable,  but only until the earlier to occur of (i) the expiration of the term of the Option and (ii) the expiration of the limited period
of time set forth in the Plan and/or your stock option agreement for the exercise of the Option following termination of your employment
with the Company.

Any Option Shares  you acquire pursuant to  the exercise of the Option shall be subject  to the terms and restrictions on transfer
set forth in the Plan. your stock option agreements and any other agreement  to  which you shall become, or are required to become, a
party pursuant to the  terms of the Plan.

You  may  be  awarded  additional  equity  grants  from  time  to  time  in  accordance  with  normal  business  practice  and  in  the  sole
discretion of the Company's Board of Directors. The terms of any future equity grant will be consistent with any plan under which they
are granted and the terms of the applicable agreement under which the award(s) are granted.

Commuting and Relocation Expenses Allowance. Rhythm agrees  to  pay  you  $176,834.65  to reimburse you for travel, commuting,
 lodging, and other relocation expenses (including moving your family to Boston  if you decide to do so) for a period of eighteen  months
commencing after your Start Date. Such $176,834.65 will be paid to you by the Company in four equal installments of $44,208.66 in
accordance with the Company's ordinary payroll practices on the first payroll date following: your Start Date, and the six-month,  twelve-
month,    and  eighteen-month  anniversary  of  your  Start  Date,  so    long  as  you  are  still  employed  by  the  Company  on  the  date  of
disbursement of the payment.   You acknowledge that this relocation expenses allowance will be taxable to you.

Benefits. You may participate in any and all benefit programs that the Company establishes and makes available to its employees from
time to time, subject to the terms and  conditions  of  those programs. The Company's benefits programs are subject to change at any time
in the Company's sole discretion.

Vacation. You will be entitled to annual paid vacation of four (4) weeks. Your accrual and use of vacation time will be pursuant and
subject to any vacation or  time off policy the Company  may establish or modify from time to time. The Company's vacation policy is
subject to change at any time in the Company's sole discretion.

Simon Kelner, page 3
May 10, 2018

Severance. If  the  Company  terminates  your  employment  without  Cause  (as  defined  below)  or  you  resign  your  employment  with  the
Company for Good Reason (as defined below) (in either event, a "Qualifying Termination"), then, subject to your execution of a release
acceptable  to  the  Company  (the  "Release"),  the  expiration  of  any  revocation  period  provided  in  the  Release    and    your    continued
compliance with the terms of the NDA (as defined below), the Company will provide severance  pay  to you in an amount equal to your
then-current  base  salary  rate  for  a  period  of  nine  (9)  months  (the  "Regular  Severance  Amount").  However,  if  such  a  Qualifying
Termination occurs on or prior to  the  first anniversary of the Start Date, the Regular Severance  Amount  will be an amount equal to
your then-current base salary rate for a period of twelve (12) months.

If there is a Qualifying Termination within the three (3) months immediately preceding or the twelve (12) months immediately
following  a  Change  of  Control  (as  such  term  is  defined  in  the  Plan),  then,  subject  to  your  execution  of  a  Release  following  your
Separation  from  Service  (as  defined  below),  the  expiration  of  any  revocation  period  provided  in  the  Release  and  your  continued
compliance with the terms of the NDA, the Company will, in lieu of the Regular Severance Amount, provide you with severance pay in
an amount (the "Change of Control Severance Amount"} equal to your then-current base salary rate for a period of twelve (12) months
plus  an  amount  equal  to  100%  of  your  then-applicable  target  annual  incentive  bonus  for  the  fiscal  year  in  which  such  Qualifying
Termination occurs, which then-applicable target annual incentive bonus amount shall be payable by the Company in equal installments
during  such  twelve  (12)  month  period  at  the  same  time  that  the  Company  is  required  to  make  payment  of  such  monthly  base  salary
payments during such twelve (12) month period.

Any  severance  amount  to  which  you  may  be  entitled  under  this  letter  will  be  paid  in  substantially  equal  installments  in
accordance with the Company's ordinary payroll practices, beginning on the first payroll date following the date that is either (i) sixty
(60)  days  after  the  date  of  your  Separation  from  Service,  or  (ii)  in  the  case  of  a  Separation  from    Service    that  is  a    Qualifying
Termination  that occurs within the three (3) months immediately preceding a Change of Control, sixty (60) days after the date of such
Change of Control, provided that, in the case of either of the foregoing clauses (i) and (ii), the Company, in its sole discretion, may have
the  option  to  pay  any  such  severance  amount  to  you  as  a  lump  sum.  To  be  eligible  for  either  the  Regular  Severance  Amount    or  the
 Change of  Control Severance Amount, as applicable, you must execute and deliver the Release to the Company and allow it to become
effective within thirty (30) days of your Separation from Service or, if later, within thirty (30) days of a Change of Control giving rise to
a Change of Control Severance Amount entitlement.

In  addition,  if  following  your  Separation  from  Service,  you  are  eligible  for  and  timely  elect  continued  medical  insurance
coverage pursuant to COBRA, the Company will reimburse you for the applicable premiums for you and your eligible dependents during
the  period  commencing  on  the  date  of  your  Separation  from  Service  and  ending  on  the  earlier  to  occur  of  (a)  the  final  day  of  the
applicable severance period and (b) the date you otherwise become ineligible for continued coverage under COBRA. Notwithstanding
the foregoing, if the Company determines that it cannot provide such reimbursement of premiums to you without potentially  violating
applicable law, the  Company  shall not be obligated to make any such payments or reimbursements to you.

If the Qualifying Termination occurs at any time within the three (3) months  immediately preceding or the twelve (12) months

immediately following a Change of Control, then each outstanding

Simon Kelner, page 4
May 10, 2018

equity award in the Company held by you (including, without limitation, the Option)  shall immediately vest and, if applicable, become
exercisable with respect to one hundred percent (100%) of the shares of equity of the Company subject thereto. The foregoing provisions
of this paragraph shall apply notwithstanding anything express or implied to the contrary in any agreement or award between you and the
Company, or in any plan of the Company, that is applicable to such outstanding equity award.

409A  Matters.Notwithstanding  anything  herein  to  the  contrary,  in  the  event  that  any  compensation  or  benefit  that  constitutes
"nonqualified  deferred  compensation"  within  the  meaning  of  Section  409A  of  the  Internal  Revenue  Code  of  1986,  as  amended  (the
"Code"),  becomes  payable  upon  the  occurrence  of  a  Change  of  Control,  such  compensation  or  benefit  shall  not  be  paid  unless  such
Change of Control constitutes a "change in control event" within the meaning of Section 409A of the Code.

Withholding Taxes. All  payments  and  benefits  described  in  this  letter  agreement  or  that  you  may  otherwise  be  entitled  or  eligible  to
receive as a result of your employment  with the Company will be subject to applicable federal, state and local tax withholdings.

280G Matters.If  any  payment  or  benefit  you  would  receive  under  this  letter,  when  combined  with  any  other  payment  or  benefit  you
receive  pursuant  to  the  termination  of  your  employment  with  the  Company ("Payment")  would  (i)  constitute  a  "parachute  payment"
within the meaning of Section 280G of the Code, and (ii) but for this sentence, be subject to the excise tax imposed by Section 4999 of
the Code (the "Excise Tax"), then such Payment shall be either (x) the full amount  of such Payment or (y) such lesser amount  (with
your choice of whether to  reduce cash payments or stock option compensation or both) as would result in no portion of the Payment
being  subject  to  the  Excise  Tax,  whichever  of  the  foregoing  amounts,  taking  into  account  the  applicable  federal,  state  and  local
employment taxes, income taxes and the Excise Tax results in your receipt, on  an after-tax basis, of the greater amount  of the Payment
notwithstanding that all or some portion of the Payment may be subject to the Excise Tax.

Definitions

Separation from Service. For purposes of this letter, "Separation from Service" means a "separation from service" within the
meaning of Section 409A of the Code. Each installment payment provided under this letter shall at all times be considered a
separate and distinct payment for purposes of Section 409A of the Code. Notwithstanding anything in this letter to the contrary,
to the extent required to avoid a prohibited distribution under Section 409A of the Code, the benefits provided under this letter
will  not  be  provided  to  you  until  the  earlier  of  (a)  the  expiration  of  the  six-month  period  measured  from  the  date  of  your
Separation from Service  with the Company or (b) the date of your death. Upon the first business day after expiration of the
relevant  period,  all  payments  delayed  pursuant  to  the  preceding  sentence    will  be  paid  in  a  lump  sum  and  any  remaining
payments due will be paid as otherwise provided herein.

Cause.  "Cause"  shall  mean  the  occurrence  of  any  of  the  following  events  by  the  individual:  (i)  commission  of  any  crime
involving  the    Company,  or  any  crime  involving  fraud,  breach  of    trust,  or  physical  or  emotional  harm  to  any  person,  moral
turpitude or dishonesty; (ii) any unauthorized use or disclosure of the Company's proprietary information (other than any such
use or disclosure that is not intentional  and is not material);  (iii) any intentional misconduct  or gross negligence that has a
material adverse effect on the Company's business or reputation; (iv) any material

Simon Kelner, page 5
May 10, 2018

breach by you of any agreement between you and the Company that is not cured within thirty (30) days after receipt of written
notice from the Company describing any such breach; or (v) repeated and willful failure to perform the duties, functions and
responsibilities of the individual's position after a written warning from the Company.

Good Reason. "Good Reason" shall mean your resignation from all positions you then hold with the Company if: (A) without
your written consent  (i) there is a  material diminution in the  nature or  scope of  your responsibilities, duties, authority, or
  title;  (ii)  there  is  a  material    reduction  of  your  base  salary;  provided,  however,  that  a  material  reduction  in  your  base  salary
pursuant  to  a  salary  reduction  program  affecting  all  or  substantially  all  of  the  employees    of  the  Company  and  that  does  not
adversely affect you to a greater extent than other similarly situated employees shall not constitute Good Reason; or (iii) you are
required to relocate your primary work location to a facility or location that would increase your one way commute distance by
more  than  thirty-five  (35)  miles  from  your  primary  work  location  as  of  immediately  prior  to  such  change,  (B)  you  provide
written  notice  outlining  such  conditions,  acts  or  omissions  to  the  Company's  Chief  Executive  Officer,  President,  or  General
Counsel within thirty (30) days immediately following such material change or reduction, (C) such material change or reduction
is not remedied by the Company within thirty (30) days following the Company's receipt of such written notice and (D) your
resignation is effective not later than thirty (30) days after the expiration of such thirty (30) day cure period. "Good Reason"
shall also mean your resignation, at your sole discretion, on the one-year anniversary of a Change  of Control from all positions
 you then hold with the Company or its successor if by that date you have not entered into a written letter or agreement with the
Company or such successor that provides for your continued employment with the Company or such successor. For purposes of
clarification, any Qualifying Termination that occurs on the first anniversary of a Change of Control shall be deemed and treated
as occurring within the twelve (12) months immediately following a Change of Control for all purposes of this letter.

Invention, Non-Disclosure, Non-Competition and Non-Solicitation Obligations. At  or  prior  to the Start Date, you shall execute and
deliver  for  the  benefit  of    the    Company    the    Employee  Confidentiality,  Assignment  of  Inventions,  Non-Competition  and  Non-
Solicitation Agreement in the form attached hereto as Exhibit A.

At-Will Employment. This letter shall not be construed as an agreement, either express or implied, to employ you for any stated term,
and  shall  in  no  way  alter  the  Company's  policy  of  employment  at-will.  Similarly,  nothing  in  this  letter  shall  be  construed    as  an
agreement, either express or implied, to pay you any compensation  or grant you any benefit  beyond  the end of your employment  with
the Company, except as otherwise explicitly set forth in this letter.  This letter supersedes  all prior understandings, whether written or
oral, with respect to the subject matter of this letter.

[The remainder of this page is intentionally left blank.]

Please indicate your acceptance of this letter agreement by signing below in the space provided for your signature.

Sincerely,

/S/ Keith Gottesdiener
Chief Executive Officer

The foregoing correctly sets forth the terms of my at-will employment with the Company. I am not relying on any representations other
than those set forth above.

/s/ Simon Kelner
Simon Kelner

Date 10th May 2018

Exhibit 10.15

rhythm

Rhythm Pharmaceuticals, Inc.
500 Boylston Street - 11th Floor
Boston, MA 02116
Main Telephone: 617-585-2090
www.rhythmtx.com

Sept 14, 2018

Dr. Murray Stewart

Dear Murray:

On  behalf  of  Rhythm  Pharmaceuticals,  Inc.,  (the  "Company"  or  "Rhythm"),  I  am  pleased  to  set  forth  below  the  terms  of  your
employment with the Company.

Employment.  You  will  be  employed  as  Chief  Medical  Officer,  beginning  on  Oct  22,  2018  (the  "Start  Date"),  reporting  to  Keith
Gottesdiener,  CEO.    During  the  term  of  your  employment    with  the  Company,  you  will  be  responsible  for  performing  the  duties
associated  with the position above or as the Company may otherwise assign to you. Your primary place of employment initially will be
in  the  Company's  offices  located  in  Massachusetts;  however,  you  will  be  expected  to  travel  as  may  be  necessary  to  fulfill  your
responsibilities. In the course of your employment with the Company, you will be subject to, and required to comply with, all Company
policies and all applicable laws and regulations.

Base Salary.  During  your  employment,  your  salary  will  be  $440,000  annualized,  subject  to  all  required  and  elected  taxes  and  other
withholdings. Your salary may be adjusted from time to time in accordance with normal business practice and in the sole discretion of the
Company.

Annual Incentive Bonus. Following the end of each fiscal year and subject to the approval by the Company's Board of Directors in its
sole discretion, you will be eligible to earn an incentive bonus, based on your performance and the Company's performance, each during
the applicable fiscal year, if your employment continues in good standing on the date of payment of such incentive bonus. Your target
annual incentive bonus opportunity shall be 35% of your annualized base salary.

Reimbursement. In recognition of potential direct transition costs to Rhythm the Company is willing to reimburse you up to a maximum
of $50,000 at the first regularly scheduled payroll period of the Company which occurs after you provide evidence of the incurrence of
such  costs  to  you.  Voluntary  termination  within  the  first  twelve  (12)  months  of  employment  will  require  repayment  by  you  of  such
signing bonus, payable to Rhythm. Any reimbursements by the Company to you of any eligible expenses that are not excludable from
your income for Federal income tax purposes (the "Taxable Reimbursements") shall be made by no later than the last day of the taxable
year following the year in which the expense was incurred.

Dr. Murray Stewart, page 2
Sept 14, 2018

Equity Grant. Subject  to  and  upon  the  approval  of  the  Board  of  Directors  of  the  Company  after  your  Start  Date,  the  Company  shall
grant to you a stock option (the "Option") under the Company's 2017 Equity Incentive Plan, as it may be amended from time to time (the
"Plan"),  to  purchase  100,000  shares  (subject  to  any  adjustments  for  any  stock  splits,  stock  dividends,  reverse  stock  splits  or
recapitalizations that are effected at any time during the period commencing after the date of this offer letter and ending on the grant date
of the Option, the "Option Shares") of the Company's common stock, $0.001 par value per share (the "Common Stock"), at an exercise
price equal to fair market value of the Common Stock, as determined by the Board of Directors of the Company, on the date of the grant
of  the  Option  (the  "Grant  Date").  Promptly  after  the  Grant  Date,  the  Company  and  you  shall  execute  and  deliver  to  each  other  the
Company's then standard form of stock option agreement, evidencing the Option and the terms thereof. The Option shall be subject to,
and governed by, the terms and provisions of the Plan and your stock option agreement.

Subject  to  the  terms  and  conditions  set  forth  below  in  this  letter  of  employment  and  unless  the  Board  of  Directors  of  the
Company  shall  otherwise  determine  on  the  Grant  Date,  the  Option  shall  be  exercisable  for  twenty-five  percent  (25%)  of  the  Option
Shares  as  of  the  first  anniversary  of  your  Start  Date,  and  the  remainder  of  the  Option  Shares  shall  become  exercisable  thereafter  in  a
series of twelve (12) equal quarterly installments until such Option shall have become fully vested and exercisable.

Upon  termination  of  your  employment  with  the  Company,  you  may  exercise  the  Option  to  the  extent  then  outstanding  and
exercisable, but only until the earlier to occur of (i) the expiration of the tenn of the Option and (ii) the expiration of the limited period of
time set forth in the Plan and/or your stock option agreement for the exercise of the Option following termination of your employment
with the Company.

Any Option Shares you acquire pursuant to the exercise of the Option shall be subject to the terms and restrictions on transfer
set forth in the Plan, your stock option agreements and any other agreement to which you shall become, or are required to become, a
party pursuant to the terms of the Plan.

You  may  be  awarded  additional  equity  grants  from  time  to  time  in  accordance  with  normal  business  practice  and  in  the  sole
discretion of the Company's Board of Directors. The terms of any future equity grant will be consistent with any plan under which they
are granted and the terms of the applicable agreement under which the award(s) are granted.

Benefits. You may participate in any and all benefit programs that the Company establishes and makes available to its employees from
time to time, subject to the terms and conditions of those programs. The Company's benefits programs are subject to change at any time
in the Company's sole discretion.

Vacation. You will be entitled to annual paid vacation of four (4) weeks. Your accrual and use of vacation time  will  be  pursuant  and
subject to any vacation or time off policy the Company may establish or modify from time to time. The Company's vacation policy is
subject to change at any time in the Company's sole discretion.

Severance. If  the  Company  terminates  your  employment  without  Cause  (as  defined  below)  or  you  resign  your  employment  with  the
Company for Good Reason (as defined below) (in either event, a "Qualifying Termination"), then, subject to your execution of a release
acceptable  to  the  Company  (the  "Release"),  the  expiration  of  any  revocation  period  provided  in  the  Release  and  your  continued
compliance

Dr. Murray Stewart, page 3
Sept 14, 2018

with the terms of the NDA (as defined below), the Company will provide severance pay to you in an amount equal to your then-current
base salary rate for a period of nine (9) months (the "Regular Severance Amount").    However, if such a Qualifying Termination occurs
on or prior to the first anniversary of the Start Date, the Regular Severance Amount will be an amount equal to your then-current base
salary rate for a period of twelve (12) months.

If there is a Qualifying Termination within the three (3) months immediately preceding or the twelve (12) months immediately
following  a  Change  of  Control  (as  such  term  is  defined  in  the  Plan),  then,  subject  to  your  execution  of  a  Release  following  your
Separation  from  Service  (as  defined  below),  the  expiration  of  any  revocation  period  provided  in  the  Release  and  your  continued
compliance with the terms of the NDA, the Company will, in lieu of the Regular Severance Amount, provide you with severance pay in
an amount (the "Change of Control  Severance Amount") equal to your then-current  base salary rate for a period of twelve (12) months
plus  an  amount  equal  to  100%  of  your  then-applicable  target  annual  incentive  bonus  for  the  fiscal  year  in  which  such  Qualifying
Termination occurs, which then-applicable target annual incentive bonus amount shall be payable by the Company in equal installments
during  such  twelve  (12)  month  period  at  the  same  time  that  the  Company  is  required  to  make  payment  of  such  monthly  base  salary
payments during such twelve (12) month period.

Any  severance  amount  to  which  you  may  be  entitled  under  this  letter  will  be  paid  in  substantially  equal  installments  in
accordance with the Company's ordinary payroll practices, beginning on the first payroll date following the date that is either (i) sixty
(60) days after the date of your Separation from Service, or (ii) in the case ofa Separation from Service that is a Qualifying Termination
that  occurs  within  the  three  (3)  months  immediately  preceding  a  Change  of  Control,  sixty  (60)  days  after  the  date  of  such  Change  of
Control, provided that, in the case of either of the foregoing clauses (i) and (ii), the Company, in its sole discretion, may have the option
to  pay  any  such  severance  amount  to  you  as  a  lump  sum.  To  be  eligible  for  either  the  Regular  Severance  Amount  or  the  Change  of
Control Severance Amount, as applicable, you must execute and deliver the Release to the Company and allow it to become effective
within thirty (30) days of your Separation from Service or, if later, within thirty (30) days of a Change of Control giving rise to a Change
of Control Severance Amount entitlement.

In  addition,  if  following  your  Separation  from  Service,  you  are  eligible  for  and  timely  elect  continued  medical  insurance
coverage pursuant to COBRA, the Company will reimburse you for the applicable premiums for you and your eligible dependents during
the  period  commencing  on  the  date  of  your  Separation  from  Service  and  ending  on  the  earlier  to  occur  of  (a)  the  final  day  of  the
applicable severance period and (b) the date you otherwise become ineligible for continued coverage under COBRA. Notwithstanding
the foregoing, if the Company determines that it cannot provide such reimbursement of premiums to you without potentially violating
applicable law, the Company shall not be obligated to make any such payments or reimbursements to you.

If the Qualifying Termination occurs at any time within the three (3) months immediately preceding or the twelve (12) months
immediately  following  a  Change  of  Control,  then  each  outstanding  equity  award  in  the  Company  held  by  you  (including,  without
limitation, the Option) shall immediately vest and, if applicable, become exercisable with respect to one hundred percent (100%) of the
shares of equity of the Company subject thereto. The foregoing provisions of this paragraph shall apply notwithstanding anything

Dr. Murray Stewart, page 4
Sept 14, 2018

express  or  implied  to  the  contrary  in  any  agreement  or  award  between  you  and  the  Company,  or  in  any  plan  of  the  Company,  that  is
applicable to such outstanding equity award.

409A  Matters.  Notwithstanding  anything  herein  to  the  contrary,  in  the  event  that  any  compensation  or  benefit  that  constitutes
"nonqualified  deferred  compensation"  within  the  meaning  of  Section  409A  of  the  Internal  Revenue  Code  of  1986,  as  amended  (the
"Code"),  becomes  payable  upon  the  occurrence  of  a  Change  of  Control,  such  compensation  or  benefit  shall  not  be  paid  unless  such
Change of Control constitutes a "change in control event" within the meaning of Section 409A of the Code.

Withholding Taxes. All  payments  and  benefits  described  in  this  letter  agreement  or  that  you  may  otherwise  be  entitled  or  eligible  to
receive as a result of your employment with the Company will be subject to applicable federal, state and local tax withholdings.

280G Matters. If any payment or benefit you would receive under this letter, when combined with any other payment or benefit you
receive  pursuant  to  the  termination  of  your  employment  with  the  Company  ("Payment")  would  (i)  constitute  a  "parachute  payment"
within the meaning of Section 2800 of the Code, and (ii) but for this sentence, be subject to the excise tax imposed by Section 4999 of
the Code (the "Excise Tax"), then such Payment shall be either (x) the full amount of such Payment or (y) such lesser amount (with your
choice of whether to reduce cash payments or stock option compensation or both) as would result in no portion of the Payment being
subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal, state and local employment
taxes,  income  taxes  and  the  Excise  Tax  results  in  your  receipt,  on  an  after-tax  basis,  of  the  greater  amount  of  the  Payment
notwithstanding that all or some portion of the Payment may be subject to the Excise Tax.

Definitions

Separation from Service. For purposes of this letter, "Separation from Service" means a "separation from service" within the
meaning of Section 409A of the Code. Each installment payment provided under this letter shall at all times be considered a
separate and distinct payment for purposes of Section 409A of the Code. Notwithstanding anything in this letter to the contrary,
to the extent required to avoid a prohibited distribution under Section 409A of the Code, the benefits provided under this letter
will  not  be  provided  to  you  until  the  earlier  of  (a)  the  expiration  of  the  six-month  period  measured  from  the  date  of  your
Separation  from  Service  with  the  Company  or  (b)  the  date  of  your  death.  Upon  the  first  business  day  after  expiration  of  the
relevant  period,  all  payments  delayed  pursuant  to  the  preceding  sentence  will  be  paid  in  a  lump  sum  and  any  remaining
payments due will be paid as otherwise provided herein.

Cause.  "Cause"  shall  mean  the  occurrence  of  any  of  the  following  events  by  the  individual:  (i)  commission  of  any  crime
involving  the  Company,  or  any  crime  involving  fraud,  breach  of  trust,  or  physical  or  emotional  harm  to  any  person,  moral
turpitude or dishonesty; (ii) any unauthorized use or disclosure of the Company's proprietary information (other than any such
use  or  disclosure  that  is  not  intentional  and  is  not  material);  (iii)  any  intentional  misconduct    or  gross  negligence  that  has  a
material adverse effect on the Company's business or reputation; (iv) any material breach by you of any agreement between you
and the Company that is not cured within thirty (30) days after receipt of written notice from the Company describing any such
breach; or (v) repeated and willful

Dr. Murray Stewart, page 5
Sept 14, 2018

failure  to  perform  the  duties,  functions  and  responsibilities  of  the  individual's  position  after  a  written  warning  from  the
Company.

Good Reason. "Good Reason" shall mean your resignation from all positions you then hold with the Company if: (A) without
your written consent (i) there is a material diminution in the nature or scope of your responsibilities, duties, authority, or title;
(ii) there is a material reduction of your base salary; provided, however, that a material reduction in your base salary pursuant to
a salary reduction program affecting all or substantially all of the employees of the Company and that does not adversely affect
you  to  a  greater  extent  than  other  similarly  situated  employees  shall  not  constitute  Good  Reason;  or  (iii)  you  are  required  to
relocate your primary work location to a facility or location that would increase your one way commute distance by more than
thirty-five (35) miles from your primary work location as of immediately prior to such change, (B) you provide written notice
outlining  such  conditions,  acts  or  omissions  to  the  Company's  Chief  Executive  Officer,  President,  or  General  Counsel  within
thirty (30) days immediately following such material change or reduction, (C) such material change or reduction is not remedied
by  the  Company  within  thirty  (30)  days  following  the  Company's  receipt  of  such  written  notice  and  (D)  your  resignation  is
effective not later than thirty (30) days after the expiration of such thirty (30) day cure period. "Good Reason" shall also mean
your resignation, at your sole discretion, on the one-year anniversary of a Change of Control from all positions you then hold
with the Company or its successor ifby that date you have not entered into a written letter or agreement with the Company or
such successor that provides for your continued employment with the Company or such successor. For purposes of clarification,
any Qualifying Termination that occurs on the first anniversary of a Change of Control shall be deemed and treated as occurring
within the twelve (12) months immediately following a Change of Control for all purposes of this letter.

Invention, Non-Disclosure, Non-Competition and Non-Solicitation Obligations.    At or prior to the Start Date, you shall execute and
deliver for the benefit of the Company the Employee Confidentiality, Assignment of Inventions, Non-Competition and Non-Solicitation
Agreement in the form attached hereto as Exhibit A.

At-Will Employment. This letter shall not be construed as an agreement, either express or implied, to employ you for any stated term,
and  shall  in  no  way  alter  the  Company's  policy  of  employment  at-will.  Similarly,  nothing  in    this  letter  shall  be  construed  as  an
agreement, either express or implied, to pay you any compensation or grant you any benefit beyond the end of your employment with the
Company, except as otherwise explicitly set forth in this letter. This letter supersedes all prior understandings, whether written or oral,
with respect to the subject matter of this letter.

[The remainder of this page is intentionally left blank.]

rhythm

Please indicate your acceptance of this letter agreement by signing below in the space provided for your signature.

Sincerely,

/S/ Keith Gottesdiener
Chief Executive Officer

The foregoing correctly sets forth the terms of my at-will employment with the Company. I am not relying on any representations other
than those set forth above.

Dr. Murray Stewart

Date

EXHIBIT A EXECUTED NDA
[See attached]

Exhibit 10.16

September 25, 2020

Jennifer Chien

Dear Jennifer,

Congratulations  on  your  offer  of  employment  with  Rhythm  Pharmaceuticals  (also  referred  to  in  this  letter  as  the  "Company"). I  run
confident you will find your career with Rhythm to be filled with opportunities, challenges and rewards. We take great pride in hiring
professionals who have talent, drive, creativity and commitment and we are delighted to have you join our team. Below you will find
important information about our organization, your individual position, rewards and benefits.

Employment. I am pleased to offer you the position of Executive Vice President, Head of North America, beginning on Oct 15, 2020 (the
"Start  Date''),  reporting  to  David  Meeker,  President  &  CEO.  You  will  be  responsible  for  performing  the  duties  associated  with  the
position above or as the Company may otherwise assign to you. Your primary place of employment will initially be in the Company's
offices located in Boston, Massachusetts; however, you will be expected to travel as may be necessary to fulfill your responsibilities. In
the course of your employment with the Company, you will be subject to, and required to comply with, all Company policies and all
applicable laws and regulations.

Base Salary .   During your employment, your salary will be  $395,000 annualized, subject to all required and elected taxes and other
withholdings. Your salary may be adjusted from time to time in accordance with normal business practice and in the sole discretion of the
Company.

Annual. Incentive Bonus. Following the end of each fiscal year and subject to the approval by the Company's Board of Directors in its
sole discretion, you will be eligible to earn an incentive bonus based on your performance and the  Company's performance, each during
the applicable fiscal year, and subject to your continued employment in good standing on the date of payment of such incentive bonus.
Your target annual incentive bonus opportunity shall be 40% of your annualized base salary.

Signing Bonus. The Company will pay you a one-time cash signing bonus of $!00,000 at the first regularly scheduled payroll period of
tl1e Company which occurs after your Start Date. Voluntary termination (unless following a Change of Control) or termination for cause
within the first twelve (12) months of employment  will require repayment  by you of such signing bonus, payable to Rhythm within 90
days of the termination date.

Equity Grant.
Subject  to  and  upon  the  approval  of  the  Board  of  Directors  of  the  Company  after  your  Start  Date,  the
Company shall grant to you a stock option (the "Option") under the Company's 2017 Equity Incentive Plan, as  it may be  amended from
 time to time (the "Plan")  to purchase  100,000 shares (subject  to  any  adjustments for  any  stock  splits, stock dividends. reverse stock
 splits or recapitalization that  are effected  at any  time during  the  period commencing after the date of  this offer letter and ending on
the grant date of the Option, the "Option Shares")  of  the Company's common stock, $0.001 par value per share (the " Common  Stock''),
at  an  exercise price equal to  fair market  value of  the Common Stoc, k   as determined by the Board of Directors of the Company, on
the date of the grant of the Option (the "Grant Date") Promptly after the Grant Date, the Company and you shall execute and deliver to
each other the Company's then standard form of stock option agreement, evidencing the Option and the terms thereof.  The Option shall
be subject to, and governed by, the terms and provisions of the Plan and your stock option agreement.

Subject to the terms and conditions set forth below in this letter of employment and 1mless the Board of Directors of the Company shall
otherwise determine on the Grant Date, the Option shall be exercisable for twenty-five percent (25%) of 1he Option Shares as of the first
anniversary  of  your  Start  Date,  and  the  remainder  of  the  Option  Shares  shall  become  exercisable  thereafter  in  a  series  of  twelve  (12)
equal quarterly installments until such Option shall have become fully vested and exercisable.

Upon termination of your employment with the Company, you may exercise the Option to the extent then outstanding and exercisable,
but only until the earlier to occur of (i) the expiration of the term of the Option and (ii) the expiration of the limited period of time set
forth in the Plan and/or your stock option agreement for the exercise of tile Option following termination of your employment with the
Company.

Any Option Shares you  acquire  pursuant  lo  the exercise of  the Option  shall  be subject  to  the terms and restrictions on transfer set
forth in the Plan, your stock option agreements and any other

agreement to which you shall become, or are required to become, a party pursuant to the terms of the Plan.

You may be awarded additional equity grants from time to time in accordance with normal business practice and in the sole discretion of
the Company's Board of Directors. The terms of any future equity grant will be consistent with any plan under which they are granted
and the terms of the applicable agreement under which the award(s) are granted.

Benefits. You may participate in any and all benefit programs that the Company establishes and makes available to its employees from
time to time, subject to the terms and conditions of those programs. The Company's benefits programs are subject to change  at any time
in the Company's sole discretion.

Vacation. You will be eligible to annual paid vacation of four (4) weeks, accrued over the course of the year and prorated based on your
start  date.  Your  accrual  and  use  of  vacation  time  will  be  pursuant  and  subject  to  any  vacation  or  time  off  policy  the  Company  may
establish or modify from time to time. The Company's vacation policy is subject to change at any time in the Company's sole discretion.

Severance. If  the  Company  terminates  your  employment  without  Cause  (as  defined  below)  or  you  resign  your  employment  with  the
Company for Good Reason (as defined below) (in either event, a '"Qualifying Termination), then, subject to your execution of a release
"), the expiration of any revocation period provided in the Release and your continued compliance
acceptable to the Company (the "
with the terms of the NDA (as defined below), the Company will provide severance pay to you in an amount equal to your then-current
base salary rate for a period of nine (9) months (the  "Regular Severance Amount").  However if such a Qualifying Termination occurs
on or prior to the first anniversary of the Start Date, the Regular Severance Amount will be an amount equal to your then current base
salary rate for a period of twelve (12)  months.

If there is a Qualifying Termination within the three (3) months immediately preceding or the twelve (12) months immediately following
a Change of Control (as such term is defined in the Plan), then, subject to your execution of a Release following your Separation from
Service  (as  defined  below),  the  expiration  of  any  revocation  period  provided  in  the  Release  and  your  continued  compliance  with  the
terms  of  the  NOA,  the  Company  will,  in  lieu  of  the  Regular  Severance  Amount,  provide  you  with  severance  pay  in  an  amount  (the
"Change of Control Severance Amount'') equal to your then-current base salary rate for a period of twelve (12) months plus an amount
equal to 100% of your then-applicable target annual incentive bonus for the fiscal year in which such Qualifying Termination occurs,
which then-applicable target annual incentive bonus amount shall be payable by the Company in equal installments during such twelve (I
2)  mouth  period  at  the  same  time  that  the  Company  is  required  to  make  payment  of  such  monthly  base  salary  payments  during  such
twelve (12) month period.

Any severance amount to which you may be entitled under this letter will be paid in substantially equal installments in accordance with
the Company's ordinary payroll practices, beginning on the first payroll date following the date that is either (i) sixty (60) days after the
date of your Separation from Service, or (ii) in the case of a Separation from Service that is a Qualifying Tem1ination that occurs within
the three (3) months immediately preceding a Change of Control, sixty (60) days after the date of such Change of Control, provided that,
in  tl1e  case  of  either  of  the  foregoing  clauses  (i)  and  (ii),  the  Company,  in  its  sole  discretion,  may  have  the  option  lo  pay  any  such
severance amount to you as a lump sum. To be eligible for either the Regular Severance Amount or  the Change of  Control Severance
Amount  as applicable, you must execute and deliver the Release to the Company and allow it to become effective within thirty (30) days
of your Separation from Service ,or if later, within thirty (30) days of a Change of Control giving rise to a Change of Control Severance
Amount entitlement.

In  addition,  if  following  your  Separation  from  Service,  you  are  eligible  for  and  timely  elect  continued  medical  insurance  coverage
pursuant  to  COBRA,  the  Company  will  reimburse  you  for  the  applicable  premiums  for  you  and  your  eligible  dependents  during  U1e
period commencing on the date of your Separation from Service and ending on the earlier to occur of (a) the final day of the applicable
severance period and (b) the date you otherwise become ineligible for continued coverage under COBRA.

Notwithstanding  the  foregoing,  if  the  Company  determines  that  it  cannot  provide  such  reimbursement  of  premiums  to  you  without
potentially violating applicable law, the Company shall not be obligated to make any such payments or reimbursements lo you.

If  the  Qualifying  Termination  occurs  at  any  time  within  the  throe  (3)  months  immediately  preceding  or  the  twelve  (12)  months
immediately  following  a  Change  of  Control,  then  each  outstanding  equity  award  in  the  Company  held  by  you  (including,  without
limitation, the Option) shall immediately vest and, if applicable, become exercisable with respect to one hundred percent (100%) of the
shares of equity of the Company subject thereto. The foregoing provisions of this paragraph shall apply notwithstanding anything express
or implied to the contrary in any agreement or award between you and the  Company, or in any plan of the Company, that is applicable to
such outstanding equity award.

409A  Matters.Notwithstanding  anything  herein  to  the  contrary,  in  the  event  that  any  compensation  or  benefit  that  constitutes
"nonqualified deferred compensation" within the meaning of Section 409A of the Internal Revenue Code of 1986, as amended (the " "),
becomes payable upon the occurrence of a Change of Control, such compensation or benefit shall not be paid unless such change of

control constitutes a "change in control event" within the meaning of Section 409A or the Code.

Withholding Taxes. All  payments  and  benefits  described  in  this  letter  agreement  or  that  you  may  otherwise  be  entitled  or  eligible  to
receive as a result of your employment with the Company will be subject to applicable federal. state and local tax withholdings.

280G Matters. If any payment or benefit you would receive under this letter, when combined with any other payment or benefit you
receive  pursuant  to  the  termination  of  your  employment  with  the  Company  ("Payment") would  (i)  constitute  a  '·parachute  payment"
within the meaning of Section 2800 of the Code, and (ii) but for this sentence, be subject to the excise tax imposed by Section 4999 of
the Code (the "Excise Tax''), then such Payment shall be either (x) the full amount of such Payment or (y) such lesser amount (with your
choice of whether lo reduce cash payments or stock option compensation or both) as would result in no portion of the Payment being
subject to the Excise Tax. whichever of the foregoing amounts, taking into account the applicable federal, state and local employment
taxes, income taxes and the Excise Tax results in your receipt, on an after-tax. basis, of the greater amount of the Payment notwid1st-
anding that all or some portion of the Payment may be subject to the Excise Tax..

Definitions

Separation from Service. For purposes of this letter, "Separation from Service" means a "separation from service" within the
meaning of Section 409A of the Code. Each installment payment provided under this letter shall at all times be considered a
separate and distinct payment for purposes of Section 409Aof the Code. Notwithstanding anything in this letter to the contrary,
to the extent required to avoid a prohibited distribution under Section 409A of the Code, the benefits provided under this letter
will  not  be  provided  to  you  until  the  earlier  of  (a)  the  expiration  of  the  six-month  period  measured  from  the  date  of  your
Separation  from  Service  with  the  Company  or  (b)  the  date  of  your  death.  Upon  the  first  business  day  after  expiration  of  the
relevant  period,  all  payments  delayed  pursuant  to  the  preceding  sentence  will  be  paid  iii  a  lump  sum  and  any  remaining
payments due will be paid as otherwise provided herein.

Cause.  '·Cause  "  shall  mean  the  occurrence  of  any  of  the  following  events  by  the  individual:  (i)  commission  of  any  crime
involving  the  Company,  or  any  crime  involving  fraud,  breach  of  trust,  or  physical  or  emotional  harm  to  any  person,  moral
turpitude or dishonesty; (ii) any unauthorized use or disclosure of the Company's proprietary information (other than any such
use  or  disclosure  that  is  not  intentional  and  is  not  material);  (iii)  any  intentional  misconduct  or  gross  negligence  that  has  a
material adverse effect on the Company's business or reputation; (iv) any material breach by you of any agreement between you
and the Company that is not cured within thirty (30) days after receipt of written notice from the Company describing any such
breach; or (v) repeated and willful failure to perform the duties, functions and responsibilities of the individual's position after a
written warning from the Company.

Good Reason. " Good Reason" shall mean your resignation from all positions you then hold with the Company if: (A) without
your written consent (i) there is a material diminution in the nature or scope of your responsibilities, duties, authority, or tide;
(ii) there is a material reduction of your base salary; provided, however, that a material reduction in your base salary pursuant to
a salary reduction program affecting all or substantially all of the employees of the Company and that does not adversely affect
you  to  a  greater  extent  than  other  similarly  situated  employees  shall  not  constitute  Good  Reason;  or  (iii)  you  are  required  to
relocate your primary work location to a facility or location that would increase your one way commute distance by more than
thirty-five (35) miles from your primary work location as of immediately prior to such change, (B)  you  provide written notice
outlining such conditions,  acts or omissions  to  the Company's Chief Executive Officer, President, or General Counsel within
thirty (30) days immediately following such material change or reduction, (C) such material change or reduction is not remedied
by  the  Company  within  thirty  (30)  days  following  the  Company's  receipt  of  such  written  notice  and  (D)  your  resignation  is
effective not later than thirty (30) days after the expiration of such thirty (30) day cure period.  "Good Reason"  shall also mean
your resignation, at your sole discretion, on the one-year anniversary of a Change of Control from all positions you then hold
with the Company or its successor if by that date you have not entered into a written letter or agreement with the Company or
such successor that provides for your continued employment with the Company or such successor. For purposes of clarification,
any Qualifying Termination that occurs on the first anniversary of a Change of Control shall be deemed and treated as occurring
within the twelve (12) months immediately following a Change of  Control for all purposes of this letter.

Invention,  Non-Disclosure,  Non-Competition  and  Non-Solicitation    Obligations.
At  or  prior  to  the  Start  Date,  you  shall
execute and deliver for the benefit of the Company the Employee Confident1ality, Assignment of Inventions, Non-Competition and Non-
Solicitation Agreement in the form attached hereto as Exhibit A.

At-Will Employment. This letter shall not be construed as an agreement, either express or implied, to employ you for any stated term,
and shall in no way alter the Company's policy of

employment  at-Will.  Similarly,  nothing  in  this  letter  shall  be  construed  as  an  agreement,  either  express  or  implied,  to  pay  you  any
compensation or grant you any benefit beyond the end of your employment with the Company except  as otherwise  explicitly   set forth
 in  this  letter    This  letter supersedes  all  prior understandings whether written or oral, with respect to the subject matter of this letter.

[The remainder of this page is intentionally left blank.]

Jennifer, I look forward to working with you as part of the Rhythm team. Please indicate your acceptance of this letter of employment by
signing a copy of this offer letter and returning it to us by Tuesday, September 29, 2020.

Sincerely,

David Meeker
President & Chief Executive Officer

The foregoing correctly sets forth the terms of my at-will  employment with Rhythm. I am not  relying on any representations other than
those set forth above.

Jennifer Chien

Date: September 27, 2020

EXHIBITA
EXECUTED NDA

[See al/ached]

Subsidiaries of Rhythm Pharmaceuticals, Inc.

Entity
Rhythm Pharmaceuticals Limited
Rhythm Securities Corp.

Jurisdiction of Organization or Incorporation
Ireland
Massachusetts

Exhibit 21.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 23.1

We consent to the incorporation by reference in the following Registration Statements:

(1) Registration Statement (Form S-3 No. 333-228323) of Rhythm Pharmaceuticals, Inc.,

(2) Registration Statement (Form S-8 No. 333-236829) pertaining to the 2017 Equity Incentive Plan and the 2017

Employee Stock Purchase Plan of Rhythm Pharmaceuticals, Inc.,

(3) Registration Statement (Form S-8 No. 333-229642) pertaining to the 2017 Equity Incentive Plan and the 2017

Employee Stock Purchase Plan of Rhythm Pharmaceuticals, Inc.,

(4) Registration Statement (Form S-8 No. 333-223647) pertaining to the 2017 Equity Incentive Plan of Rhythm

Pharmaceuticals, Inc., and

(5) Registration Statement (Form S-8 No. 333-220925) pertaining to the 2017 Equity Incentive Plan and the 2017

Employee Stock Purchase Plan of Rhythm Pharmaceuticals, Inc.;

of our reports dated March 1, 2021, with respect to the consolidated financial statements of Rhythm Pharmaceuticals,
Inc. and the effectiveness of internal control over financial reporting of Rhythm Pharmaceuticals, Inc. included in this
Annual Report (Form 10-K) of Rhythm Pharmaceuticals, Inc. for the year ended December 31, 2020.

/s/ Ernst & Young LLP

Boston, Massachusetts
March 1, 2021

Exhibit 31.1

CERTIFICATION

I, David P. Meeker M.D., certify that:

1.  I have reviewed this annual report on Form 10-K of Rhythm Pharmaceuticals, Inc.;

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(s) 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(s) 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.

Date:  March 1, 2021

/s/ David P. Meeker M.D.
Name: David P. Meeker M.D.
Title:  Chief Executive Officer and President
          (Principal Executive Officer)

Exhibit 31.2

CERTIFICATION

I, Hunter C. Smith, certify that:

1.  I have reviewed this annual report on Form 10-K of Rhythm Pharmaceuticals, Inc.;  

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(s) 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(s) 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.  

Date:  March 1, 2021

/s/ Hunter C. Smith
Name: Hunter C. Smith
Title:   Chief Financial Officer
           (Principal Financial And Accounting Officer)

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER
PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I,  David P. Meeker M.D., certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that, to my knowledge, this Annual Report on Form 10-K of Rhythm Pharmaceuticals, Inc.
for  the  fiscal  year  ended  December  31,  2020  fully  complies  with  the  requirements  of  Section  13(a)  or  15(d)  of  the
Securities Exchange Act of 1934 and the information contained in such Form 10-K fairly presents, in all material respects,
the financial condition and results of operations of Rhythm Pharmaceuticals, Inc.

/s/ David P. Meeker M.D.
Name: David P. Meeker M.D.
Title:   Chief Executive Officer and President
          (Principal Executive Officer) 

March 1, 2021

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER
PURSUANT TO 18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I,  Hunter  C.  Smith,  certify  pursuant  to  18  U.S.C.  Section  1350,  as  adopted  pursuant  to  Section  906  of  the
Sarbanes-Oxley Act of 2002, that, to my knowledge, this Annual Report on Form 10-K of Rhythm Pharmaceuticals, Inc.
for  the  fiscal  year  ended  December  31,  2020  fully  complies  with  the  requirements  of  Section  13(a)  or  15(d)  of  the
Securities Exchange Act of 1934 and the information contained in such Form 10-K fairly presents, in all material respects,
the financial condition and results of operations of Rhythm Pharmaceuticals Inc.

/s/ Hunter C. Smith
Name: Hunter C. Smith
Title:   Chief Financial Officer
           (Principal Financial and Accounting Officer)

March 1, 2021