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Rhythm Pharmaceuticals

rytm · NASDAQ Healthcare
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FY2024 Annual Report · Rhythm Pharmaceuticals
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ANNUAL REPORT

About Rhythm Pharmaceuticals 
Rhythm is a commercial-stage biopharmaceutical 
company committed to transforming the lives of patients 
living with rare neuroendocrine diseases. 
Rhythm’s lead asset, IMCIVREE® (setmelanotide), an MC4R agonist designed to treat hyperphagia and 
severe obesity, is approved by the U.S. Food and Drug Administration (FDA) to reduce excess body weight 
and maintain weight reduction long term in adult and pediatric patients 2 years of age and older with 
syndromic or monogenic obesity due to Bardet-Biedl syndrome (BBS) or genetically confirmed 
pro-opiomelanocortin (POMC), including proprotein convertase subtilisin/kexin type 1 (PCSK1), deficiency 
or leptin receptor (LEPR) deficiency. Both the European Commission (EC) and the UK’s Medicines & 
Healthcare Products Regulatory Agency (MHRA) have authorized IMCIVREE for the treatment of 
obesity and the control of hunger associated with genetically confirmed BBS or genetically confirmed
loss-of-function biallelic POMC, including PCSK1, deficiency or biallelic LEPR deficiency in adults and 
children 2 years of age and above. Additionally, Rhythm is advancing a broad clinical development program 
for setmelanotide in other rare diseases, as well as investigational MC4R agonists bivamelagon and 
RM-718, and a preclinical suite of small molecules for the treatment of congenital hyperinsulinism. Rhythm’s 
headquarters is in Boston, MA.
RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT     1

Letter to Shareholders
2      RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT
Through our work and the work of those who came before us, we were able to develop setmelanotide, secure 
regulatory approval, and bring it to patients in the United States, Europe, Great Britain and beyond. From the 
first evidence of setmelanotide’s efficacy in animal models to treating thousands of trial or commercial patients 
globally, our belief in the importance of this pathway and the potential of setmelanotide to correct the defective 
signaling and transform the lives of patients living with these diseases has continued to grow. We are excited for 
what is still to come as we continue to interrogate the different ways this pathway can be impaired and evaluate 
our next generation of MC4R agonists. 
Dear Fellow Shareholders: 
As we look at Rhythm’s recent accomplishments – including truly compelling topline 
data from our Phase 3 trial of setmelanotide in acquired hypothalamic obesity – I am 
reminded of the importance of simply following the science in pursuit of our mission to 
better the lives of patients and families. From our founding, we have leveraged more 
than 40 years of research into the MC4R pathway, which has contributed significantly 
to our understanding of MC4R agonism and MC4R pathway diseases. 
The MC4R pathway, located in the hypothalamus of the brain, 
regulates energy balance through its modulation of energy intake 
and energy expenditure while controlling feelings of hunger and 
satiety. When pathway function is impaired, hunger and food 
intake increase and energy utilization decreases, which when 
combined can lead to dramatic increases in body weight, often 
from a very early age. 
At Rhythm, we are exploring two distinct causes for this impairment: first, the genetic side, where variants 
within certain pathway genes drive dysfunction of the pathway that manifests from birth, such as POMC 
deficiency and Bardet-Biedl syndrome; and second, injury to the hypothalamus or failure of the hypothalamus 
to normally develop which disrupts pathway anatomy. Injury may come from certain brain tumors, such as 
craniopharyngioma, or their treatment and can result in acquired hypothalamic obesity, whereas the congenital 
form is due to idiopathic defects that lead to a failure of neurodevelopment and may cause congenital 
hypothalamic obesity. These impairments of pathway signaling – whether caused by injury, a failure of the 
hypothalamus to develop normally, or a genetic defect – result in a deficiency of the hormone, hypothalamic 
derived alpha-melanocyte stimulating hormone (alpha-MSH). IMCIVREE (setmelanotide) acts as a replacement 
for alpha-MSH, filling its critical role of agonizing the MC4 receptor to reduce energy intake, increase energy 
expenditure and consequentially reduce body weight. 
The first preclinical evidence of setmelanotide’s potential was published in 2009 when it was shown to reduce 
food consumption and body weight in mice. Interestingly, a year later we saw the first publication definitively 
linking craniopharyngioma, hypothalamic obesity and the MC4R pathway. Our seminal clinical work through an 
investigator-initiated Phase 2 study in the genetic disease POMC deficiency showed remarkable – and previously 
unseen – weight loss of approximately 25% in two patients. Initial studies in two other genetic diseases, LEPR 
deficiency and BBS, showed positive results, as well, ultimately leading to regulatory approvals in 2020 and 
2022. 
In parallel, published research pointed to the links between an anatomical injury to the hypothalamus, impaired 
MC4R pathway function and low levels of alpha-MSH in patients with craniopharyngioma associated acquired 
hypothalamic obesity. Fast forward 15 years, our Phase 2, open label extension and Phase 3 trials have 
demonstrated that patients respond to MC4R agonists.

These studies delivered remarkable results in a patient population for whom nothing else has worked. Extending 
our learnings from these data, we hypothesized that setmelanotide could additionally help patients with 
congenital hypothalamic obesity. Early data from France, where investigators have treated a small number of 
patients with congenital hypothalamic obesity, are highly encouraging.  
In pursuit of our strategy to fully interrogate the different ways MC4R signaling can be impaired, we continue to 
investigate other genetic variants in the MC4R pathway beyond our initial approvals for POMC, LEPR and BBS 
genes, which established strong proof of concept for this approach. Four additional genes are being studied in 
our fully enrolled Phase 3 EMANATE trial which we expect to read out in the first quarter of 2026. Additionally, we 
believe our recently completed Phase 2 DAYBREAK study provides us with a road map for genes we may want to 
study next. From Rhythm’s beginning, we recognized that we not only had to follow the science in establishing 
the importance of the biology (in this case the MC4R pathway), but we needed to help patients affected with 
these diseases get to a diagnosis. Our Rhythm sponsored genetic testing program now has samples from over 
100,000 patients submitted by more than 6,000 physicians. Our genetic database, believed to be one of the 
largest of its kind, has driven our genetic indication strategy. One powerful observation from our DAYBREAK 
study, the setmelanotide response of patients with a MAGEL2 gene variant, informed our decision to initiate 
our new Phase 2 trial in Prader-Willi syndrome (PWS), since MAGEL2 is one of the genes thought to contribute to 
obesity and hyperphagia in PWS.
Recognizing the power and potential of the MC4R pathway, Rhythm is fully committed to being the world’s 
leading biopharmaceutical company researching and treating MC4R diseases. We have significantly deepened 
and evolved our pipeline to ensure the longevity and impact of our MC4R agonist franchise. Leveraging our 
proprietary knowledge of setmelanotide, we developed RM-718, a more targeted and specific next-generation 
MC4R agonist that can be administered once weekly. Furthermore, our acquisition of LG Chem’s oral MC4R 
agonist, bivamelagon, reflected our excitement at the first ever clinical-stage, small molecule MC4R agonist. 
With these two next generation MC4R agonists, we believe we are well positioned to continue leading the 
way in MC4R agonism, generating more data and bringing potentially life-changing therapies to patients. We 
understand it is not enough to do great science or to have approved therapies. The ultimate measure of success 
is when patients with these diseases can get to an accurate diagnosis and have access to a safe and effective 
medicine delivered in a convenient way, which ensures they will get the full benefit of MC4R agonism wherever 
they live in the world.
As we move forward, we remain steadfast in our resolve to follow the science to discover and develop meaningful 
treatments that can improve the lives of patients with rare neuroendocrine diseases. With a solid foundation in 
place and science leading us in multiple directions, we will continue to grow and evolve. We have much work to 
do. It’s an exciting time at Rhythm. 
Thank you for your continued support and trust. 
Sincerely, 
David Meeker, MD
Chairman, Chief Executive Officer and President
Our Rhythm sponsored genetic testing program now has 
samples from over 100,000 patients submitted by more than 
6,000 physicians. Our genetic database, believed to be one of 
the largest of its kind, has driven our genetic indication strategy. 
RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT     3

The MC4R Pathway
4      RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT
The melanocortin-4 receptor (MC4R) pathway is the central regulator of body weight. Located in the 
hypothalamus of the brain, it plays an indispensable role in regulating the two sides of the energy balance, 
energy intake and energy expenditure, while also controlling our feelings of hunger and satiety. Amongst 
all homeostatic systems, the MC4R pathway is unique in its architecture, with two counter-active neuronal 
populations converging to regulate the activity of a single effector neuron – the MC4R neuron.
Proopiomelanocortin (POMC) neurons produce the natural agonist of the MC4R, alpha-melanocyte stimulating 
hormone (a-MSH). When activated by a-MSH, MC4R neurons promote feelings of fullness, reduces food 
consumption and increases energy balance to collectively promote weight loss. Conversely, Agouti-related 
peptide (AgRP), produced by eponymous neurons, is the natural MC4R antagonist which inhibits MC4R neurons 
to increase feelings of hunger, increase food consumption and decrease energy expenditure to promote weight 
gain. Importantly, POMC and AgRP neurons are the cellular targets for the obesity related hormone leptin, 
which activates and inhibits them, respectively. When functioning normally, the MC4R pathway bidirectionally 
regulates these facets of energy balance to maintain a stable body weight. However, disruption to pathway 
function, which can be caused by genetic variants in critical pathway genes or brain injuries, can lead to 
conditions like hyperphagia, a pathological hunger that can lead to abnormal food-seeking behaviors, decreased 
energy expenditure and severe obesity. 
As the first FDA approved MC4R agonist for the treatment of obesity and hyperphagia, the development of 
IMCIVREE© (setmelanotide) leveraged more than 40 years of scientific research. Below is an overview of some of 
the seminal research into the MC4R pathway and MC4R agonism that underpins Rhythm’s success in defining, 
identifying and transforming the lives of patients living with MC4R pathway diseases. 
Impaired LEPR Signaling Reduces Activation of MC4R-Expressing 
Neurons, Which Can Lead to Hyperphagia and Obesity

 
RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT     5

Alpha-MSH producing neurons of the 
hypothalamus are identified. 
“Alpha-Melanocyte Stimulating Hormone: 
Immunohistochemical Identification and 
Mapping in Neurons of Rat Brain” 
published in the Proceedings of the 
National Academy of Sciences (PNAS) 
offered the first significant insights into the 
identity of hypothalamic POMC 
neurons in the rat brain using
 Immunofluorescence to label alpha-MSH in 
the arcuate nucleus.
1978
1993
1997
1998
First evidence that MC4R dysfunction leads to 
severe obesity and hyperphagia. 
“Targeted Disruption of the Melanocortin-4 
Receptor Results in Obesity in Mice” published in 
Cell revealed the importance of the MC4R to energy 
balance and body weight. Targeted deletion of the 
MC4R from the mouse genome led to severe 
obesity, hyperphagia (increased food intake), 
hyperinsulinemia, and hyperglycemia. These 
findings marked the MC4R as a potential 
anti-obesity target for drug discovery.  
Hypothalamic AgRP is identified as the 
natural MC4R antagonist. 
“Antagonism of Central Melanocortin Receptors
 in Vitro and in Vivo by Agouti-Related Protein” 
published in Science was the first study to 
identify AgRP as a hypothalamic neuropeptide that 
antagonizes central melanocortin receptors, playing 
a crucial role in the regulation of body weight.
The first patient with clinical POMC deficiency 
obesity was described. 
“Early Onset Obesity, Adrenal Insufficiency, and Red Hair 
Pigmentation Caused by POMC Mutations in Humans” 
published in Nature Genetics identified and characterized the 
first patients diagnosed with POMC deficiency. These patients 
presented with hyperphagia and rapid weight gain starting in 
infancy and severe obesity and genetic testing revealed 
complete loss of function mutations in the POMC gene. The 
study emphasized the importance of genetic 
testing in diagnosing rare forms of obesity and opened 
avenues for developing targeted therapies.
The first MC4R-deficient patient was described. 
“A Frameshift Mutation in MC4R Associated with Dominantly 
Inherited Human Obesity” published in Nature Genetics exam-
ined the clinical consequence of naturally arising mutations 
in the human MC4R gene. Consistent with the phenotype of 
POMC deficiency, MC4R deficient patients exhibited severe 
early onset obesity and hyperphagia. These data lent clinical 
validation to the MC4R knockout model and highlighted the 
increased focus on the MC4R as an anti-obesity drug target.
6      RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT
The MC4R is identified in humans. 
“Molecular Cloning, Expression, 
and Gene Localization of a Fourth 
Melanocortin Receptor”
 published in The Journal of 
Biological Chemistry was the first 
demonstration of the existence 
of the MC4R in humans and its 
activation by a-MSH, laying the 
groundwork for the 
identification of synthetic MC4R 
agonists. 

RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT    7
2001
The MC4R pathway is the functional 
target for the anti-obesity hormone leptin. 
“Leptin Activates Anorexigenic POMC 
Neurons through a Neural Network in the 
Arcuate Nucleus” published in Nature 
showed how leptin activates appetite-
suppressing POMC neurons in the 
hypothalamus to regulate feeding 
behavior and established a circuit diagram 
for how leptin, AgRP and POMC neurons 
are wired together to facilitate precise 
control of energy balance. This 
represented the first conception of the 
‘leptin-melanocortin’ system.
2005
Appetite regulating MC4R neurons 
are identified in the hypothalamus. 
“Divergence of the melanocortin 
pathway in the control of food 
intake and energy expenditure” 
published in Cell used cutting edge 
genetic techniques to identify 
the critical population of MC4R 
neurons responsible for controlling 
satiety and food intake. These data 
lent mechanistic insight to the 
development of hyperphagia and 
obesity in MC4R-pathway disease 
and highly enabled drug discovery 
initiatives. 
2009
The first MC4R peptide agonist clinical trial identified a 
class-based cardiovascular side effect in general obesity. 
“Modulation of Blood Pressure by Central Melanocortinergic 
Pathway” published in the New England Journal of Medicine 
reported results from a double-blind, dose-escalating, crossover 
trial that showed that the MC4R peptide agonist, LY2112688 
(Eli Lilly), led to significant increases in systolic and diastolic 
blood pressures at 24 hours compared to placebo. These data 
identified a new challenge for MC4R agonist drug discovery - to 
separate the potential weight loss efficacy from the 
cardiovascular liability of pharmacological MC4R agonism. 
The first preclinical evidence of setmelanotide’s weight loss 
efficacy is published.
 “Analysis of the therapeutic functions of novel melanocortin re-
ceptor agonists in MC3R- and MC4R-deficient C57BL/6J mice”, 
published in Peptides demonstrated BIM-22493 (aka. setmel-
anotide) significantly reduced food consumption and body 
weight in obese mice and that the effect was contingent upon 
the presence of a functional MC4R. These data supported the 
potential efficacy and mechanism of action of setmelanotide.
The first MC4R small molecule agonist fails to deliver clinical 
efficacy in general obesity.  
“Potent and Selective Agonism of the Melanocortin Receptor 
4 With MK-0493 Does Not Induce Weight Loss in Obese Human 
Subjects: Energy Intake Predicts Lack of Weight Loss Efficacy” 
published in Clinical Pharmacology & Therapeutics presented 
findings from Phase I and 2 studies demonstrating a lack of 
significant effects by MK-0493 (Merck) on energy intake and 
weight loss in obese individuals. 
2009 (cont.)

The first publication to identify a definitive link 
between craniopharyngioma (CP), 
hypothalamic obesity and the MC4R pathway.
 “Changes of Peripheral a-Melanocyte-
Stimulating Hormone in Childhood Obesity” 
published in Metabolism, revealed that alpha-MSH 
levels are significantly lower in patients with CP 
due to damage to the hypothalamus. This 
supported MC4R pathway dysfunction as a driver 
of obesity, hyperphagia and low energy 
expenditure in hypothalamic obesity and provides 
mechanistic rationale for alpha-MSH replacement 
therapy through pharmacological MC4R agonism.
2010
2016
2014
A long acting MC4R peptide agonist fails to deliver 
efficacy in general obesity clinical trial. 
“Investigation of Safety, Tolerability, 
Pharmacokinetics, and Pharmacodynamics of Single 
and Multiple Doses of a Long-Acting a-MSH Analog in 
Healthy Overweight and Obese Subjects” 
published in The Journal of Clinical Pharmacology, 
reported a lack of weight loss in patients treated with 
MC4-NN2-0453 (Novo Nordisk) and the emergence 
of hyperpigmentation due to MC1R activity, further 
highlighting the challenges of clinical MC4R agonism.
2018
Setmelanotide is the first MC4R agonist to 
demonstrate CV-safe weight loss efficacy in 
clinical POMC deficiency. 
“Proopiomelanocortin Deficiency Treated with 
a Melanocortin-4 Receptor Agonist,” published 
in New England Journal of Medicine detailed 
the long term treatment of patients with POMC 
deficiency using setmelanotide. The collabo-
ration between Rhythm Pharmaceuticals and 
researchers at Charite University, Germany, 
demonstrated significant weight loss in two 
genetically confirmed POMC deficient pa-
tients with no evidence of elevations in blood 
pressure. These groundbreaking findings 
highlighted the potential of setmelanotide as a 
mechanism-based therapy for hyperphagia and 
obesity in patients with MC4R pathway related 
obesity.
Setmelanotide again made headlines, 
this time in patients with leptin receptor 
deficiency obesity.  
“MC4R Agonism Promotes Durable 
Weight Loss in Patients with Leptin 
Receptor Deficiency” published in 
Nature Medicine, reported out results of 
a Phase 2 study conducted by Rhythm 
in three patients with leptin receptor 
(LEPR) deficiency living with hyper-
phagia and severe early-onset obesity. 
Treatment with setmelanotide led to 
substantial reductions in 
hyperphagia and body weight with mild 
adverse events and no significant 
changes in blood pressure.
8      RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT

RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT    9
2020
The Phase 3 studies that led to setmelanotide’s 
first regulatory approval for treatment of POMC 
and LEPR deficiency. 
“Efficacy and Safety of Setmelanotide, an MC4R 
Agonist, in Individuals with Severe Obesity due to 
LEPR or POMC Deficiency: Single-Arm, 
Open-Label, Multicentre, Phase 3 Trials”, 
published in The Lancet Diabetes & 
Endocrinology documented results from two 
Phase 3 studies conducted by Rhythm in which
setmelanotide demonstrated clinically meaningful 
and statistically significant reductions in body 
weight and hunger in patients with POMC or LEPR 
deficiency, paving the way for setmelanotide to 
be approved later that year and commercialized 
by Rhythm under the brand name IMCIVREE. 
2022
Setmelanotide’s second regulatory approval for the 
treatment of obesity associated with Bardet-Biedl 
Syndrome (BBS). 
“Efficacy and Safety of Setmelanotide, a 
Melanocortin-4 Receptor Agonist, in Patients with 
Bardet-Biedl Syndrome and Alström Syndrome: a 
Multicentre, Randomised, Double-Blind, Placebo-
Controlled, Phase 3 Trial with an Open-Label Period” was 
published in The Lancet Diabetes & Endocrinology. The 
paper detailed how setmelanotide therapy resulted in 
significant body weight hunger reductions in patients 
with Bardet-Biedl syndrome (BBS), yielding the data on 
which the FDA approved a label expansion for IMCIVREE 
as the first treatment for obesity in these patients.
Setmelanotide demonstrates transformative 
weight loss in patients li ing with 
hypothalamic obesity.
 “Setmelanotide for the Treatment of Acquired 
Hypothalamic Obesity: a Phase 2, Open-Label, 
Multicentre Trial” published in The 
Lancet Diabetes & Endocrinology presented 
data from
 Phase 2 study conducted by Rhythm 
that showed setmelanotide demonstrated highly 
significant and clinically meaningful reductions in 
weight and hunger in patients with acquired 
hypothalamic obesity, with a mean reduction in 
BMI of 26% over 12 months of treatment. This 
study laid the groundwork for Rhythm’s 
successful Phase 3 trial in hypothalamic obesity.
2024
a
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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, 2024 
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 
46-2159271 
(State or Other Jurisdiction of 
(I.R.S. Employer 
Incorporation or Organization) 
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 
Trading Symbol(s) 
Name of each exchange on which registered 
Common Stock, $0.001 par value per share 
RYTM 
The Nasdaq Stock Market LLC (Nasdaq Global 
Market) 
 
Securities registered pursuant to Section 12(g) of the Act: None 
 
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒  No   ☐ 
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes  ☐  No  ☒ 
 
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 
12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes ☒   
No  ☐ 
 
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T  
(§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No  ☐ 
 
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth 
company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange 
Act. 
Large accelerated filer ☒ 
               Accelerated filer ☐ 
 
 
Non-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.  ☒ 
 
If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the 
correction of an error to previously issued financial statements. ☐ 
Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the 
registrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b). ☐ 
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes  ☐  No  ☒. 
 
The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant was approximately $2.4 billion, based on the closing price 
of the registrant’s Common Stock on June 28, 2024, 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 63,223,727 shares of the registrant's Common Stock outstanding as of February 24, 2025. 
 
DOCUMENTS INCORPORATED BY REFERENCE 
 
The registrant intends to file a definitive proxy statement for the registrant's 2025 Annual Meeting of Stockholders within 120 days of the end of the fiscal year ended 
December 31, 2024. Portions of such definitive proxy statement are incorporated by reference into Part III of this Annual Report on Form 10-K. 
 
 

2 
RHYTHM PHARMACEUTICALS, INC. 
ANNUAL REPORT ON FORM 10-K 
For the Year Ended December 31, 2024 
Table of Contents 
 
 
 
     
Page No. 
PART I 
 
 
 
 
 
 
Item 1.    Business 
 
6
 
 
 
 
Item 1A. Risk Factors 
 
53
 
 
 
 
Item 1B. Unresolved Staff Comments 
 
117
 
 
 
 
Item 1C. Cybersecurity 
 
117
 
 
 
 
Item 2.    Properties 
 
119
 
 
 
 
Item 3.    Legal Proceedings 
 
119
 
 
 
 
Item 4.    Mine Safety Disclosures 
 
119
 
 
 
PART II  
 
 
 
 
 
Item 5.    Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer 
Purchases of Equity Securities 
 
120
 
 
 
 
Item 6.   [Reserved] 
 
121
 
 
 
 
Item 7.   Management’s Discussion and Analysis of Financial Condition and Results of 
Operations 
 
121
 
 
 
 
Item 7A. Quantitative and Qualitative Disclosures about Market Risk 
 
136
 
 
 
 
Item 8.   Financial Statements and Supplementary Data 
 
136
 
 
 
 
Item 9.   Changes in and Disagreements with Accountants on Accounting and Financial 
Disclosures 
 
136
 
 
 
 
Item 9A. Controls and Procedures 
 
137
 
 
 
 
Item 9B. Other Information 
 
139
 
 
 
 
Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections 
 
140
 
 
 
PART III  
 
 
 
 
 
Item 10. Directors, Executive Officers and Corporate Governance 
 
140
 
 
 
 
Item 11. Executive Compensation 
 
140
 
 
 
 
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related 
Stockholder Matters 
 
140
 
 
 
 
Item 13. Certain Relationships and Related Transactions and Director Independence 
 
141
 
 
 
 
Item 14. Principal Accountant Fees and Services 
 
141
 
 
 
PART IV 
 
142
 
 
 
 
Item 15. Exhibits and Financial Statement Schedules 
 
142
 
 
 
 
Item 16. Form 10-K Summary 
 
145
 
 
 
SIGNATURES 
 
146
 
 
 

3 
 
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 the marketing and commercialization of IMCIVREE® 
(setmelanotide), bivamelagon (formerly LB54640), and RM-718, and the timing of commercialization, the success, cost 
and timing of our product development activities and clinical trials, the ongoing enrollment of patients in our clinical trials, 
our expectations surrounding potential regulatory submissions, progress, or approvals and timing thereof for any of our 
product candidates; the estimated market size and addressable population for our drug products; the announcement of data 
from our clinical trials, including our Phase 3 trial evaluating setmelanotide for patients with acquired hypothalamic 
obesity, the substudy evaluating setmelanotide for patients with congenital hypothalamic obesity, the Phase 3 EMANATE 
trial evaluating setmelanotide in genetically caused MC4R pathway diseases, and the Phase 2 trial evaluating the oral 
MC4R agonist bivamelagon in acquired hypothalamic obesity; Part C of the Phase 1 trial evaluating RM-718; the open-
label Phase 2 trial evaluating setmelanotide in patients with Prader-Willi syndrome, 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, including in international regions, 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 relationship 
with third parties, our marketing, commercial sales, and revenue generation, expectations surrounding our manufacturing 
arrangements, the potential financial impact, growth prospects and future benefits of our ongoing discovery efforts with 
respect to congenital hyperinsulinism, the impact of economic conditions on our business and operations and our future 
financial results, changes in the political and regulatory landscape, 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. Additionally, certain information we may disclose 
(either herein or elsewhere) is informed by the expectations of various stakeholders or third-party frameworks and, as 
such, may not necessarily be material for purposes of our filings under U.S. federal securities laws, even if we use 
“material” or similar language in discussing such matters.   
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. 

4 
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. To date, we have 
generated approximately $227.6 million 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.  
• 
Our Revenue Interest Financing Agreement with Healthcare Royalty Partners, our license agreement with 
LGC, and our other agreements, could restrict our ability to commercialize IMCIVREE, limit cash flow 
available for our operations and expose us to risks that could adversely affect our business, financial condition 
and results of operations. 
• 
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. Failure to obtain or maintain coverage and adequate reimbursement 
for setmelanotide or our other product candidates, if any and if approved, could severely 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 and preliminary data may not be predictive of final results. 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 with each of the MC4R pathway deficiencies is very 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 and, guidance in the United States or abroad, 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 
specified 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 

5 
commercialization of setmelanotide. 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 marking 
of an in vitro companion diagnostic device would 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. 
• 
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 CHI program remains in the discovery stage and although we intend to identify an investigational 
candidate in 2025, we cannot be assured that we will ever successfully develop and commercialize a CHI 
product candidate. 
• 
If the third parties we rely on, and will continue to rely on, do not successfully carry out their contractual 
obligations or meet expected timelines, we may not be able to obtain additional regulatory approvals for or 
continue to commercialize setmelanotide and our business could be materially adversely affected.  
• 
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 sufficient 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 or our other product candidates, others could compete against us more directly, 
which would have a material adverse impact on our business, results of operations, financial condition and 
prospects. 
• 
Global events, such as pandemics, economic, political and regulatory changes and uncertainties, have and 
may continue to adversely impact our business, including our preclinical studies, clinical trials and other 
commercialization prospects.  
 
 
 
 
 
 

6 
 
 
PART I 
Item 1. Business 
Overview 
We are a global, commercial-stage biopharmaceutical company dedicated to transforming the lives of patients 
living with rare neuroendocrine diseases. We are focused on advancing our melanocortin-4 receptor (MC4R) agonists, 
including our lead asset, IMCIVREE® (setmelanotide), as precision medicines designed to treat hyperphagia and severe 
obesity caused by rare MC4R pathway diseases. While obesity affects hundreds of millions of people worldwide, we are 
developing therapies for a subset of individuals who have hyperphagia, a pathological, insatiable hunger and impaired 
satiety accompanied by persistent and abnormal food-seeking behaviors, decreased energy expenditure and severe obesity 
due to diseases such as acquired or congenital hypothalamic obesity, Bardet-Biedl syndrome (BBS) or other diseases 
caused by impaired MC4R pathway signaling. The MC4R pathway is a neuro-endocrine pathway in the brain that is 
responsible for regulating hunger, caloric intake and energy expenditure, which consequently affect body weight. 
IMCIVREE, an MC4R agonist for which we hold worldwide rights, is the first-ever therapy that is marketed in the United 
States, European Union (EU), United Kingdom, Canada and several other countries and regions for certain rare MC4R 
pathway diseases, including BBS.  
Our late-stage clinical development program in acquired hypothalamic obesity presents a meaningful expansion 
opportunity for setmelanotide. Acquired hypothalamic obesity is a rapid-onset, severe obesity caused by injury to the 
hypothalamus, which may impair MC4R pathway signaling. We believe there are between 5,000 and 10,000 patients in 
United States living with acquired hypothalamic obesity with an annual incidence of 500 new cases, with similar 
prevalence and incidence in Europe, as well as between 5,000 and 8,000 patients in Japan. We believe this represents a 
significant global unmet need as there are no therapies specifically approved for hypothalamic obesity. With setmelanotide, 
we observed positive efficacy results in our Phase 2 trial, with a clinically meaningful BMI reduction of 25.5% in 
11 patients who reached 12 months or more on therapy through the extension phase of the trial. In addition, similar positive 
data suggesting potential efficacy have been reported from a pre-approval, early-access program in France. We have 
completed enrollment in our Phase 3 trial in patients with acquired hypothalamic obesity and we are on track to disclose 
topline data in the second quarter of 2025. During the first quarter of 2025, we completed enrollment in a supplemental, 
12-patient Japanese cohort of the global Phase 3 trial in acquired hypothalamic obesity designed to enable potential 
registration of setmelanotide in Japan for this rare disease. In addition, we added an independent substudy to our ongoing 
global trial, in order to evaluate setmelanotide in patients with congenital hypothalamic obesity, a rare disease caused by 
certain brain abnormalities that may impair the function of the MC4R pathway, with enrollment of the first patients in this 
substudy expected in the first quarter of 2025. Our preliminary estimate of the prevalence of congenital hypothalamic 
obesity is in excess of 1,000 patients in the United States with a similar prevalence in Europe, and this is in addition to the 
prevalence for acquired hypothalamic obesity above.  
For IMCIVREE, which was first approved in the United States in 2020, we have demonstrated success in 
achieving regulatory approvals and securing market access in approved indications in more than 15 countries in addition 
to the United States, and we continue to seek access in additional markets. IMCIVREE is approved by the U.S. Food and 
Drug Administration (FDA) to reduce excess body weight and maintain weight reduction long term in adult and pediatric 
patients aged 2 years and older with syndromic or monogenic obesity due to BBS or pro-opiomelanocortin (POMC), 
proprotein convertase subtilisin/kexin type 1 (PCSK1), or leptin receptor (LEPR) deficiency as determined by an FDA-
approved test demonstrating variants in POMC, PCSK1, or LEPR genes that are interpreted as pathogenic, likely 
pathogenic, or of uncertain significance (VUS). The European Commission (EC) and the United Kingdom’s Medicines & 
Healthcare Products Regulatory Agency (MHRA) have authorized IMCIVREE for the treatment of obesity and the control 
of hunger associated with genetically confirmed BBS or loss-of-function biallelic POMC, including PCSK1, deficiency 
or biallelic LEPR deficiency in adults and children 2 years of age and above.  
With our efforts in hypothalamic obesity and other potential indications, we are advancing what we believe is the 
most comprehensive clinical research and development program ever initiated in MC4R pathway diseases, with multiple 

7 
ongoing and planned clinical trials.  Our MC4R pathway program is designed to expand the total number of patients who 
we believe could benefit from setmelanotide therapy or from one of our new drug candidates. Our Phase 3 EMANATE 
trial, comprised of four independent substudies evaluating setmelanotide in genetically caused MC4R pathway diseases, 
is ongoing. Following the completion of our Phase 2 DAYBREAK trial, we identified six genetically-defined cohorts that 
we believe merit further investigation for potential setmelanotide efficacy. We also are evaluating setmelanotide for the 
treatment of Prader-Willi syndrome (PWS) in a 26-week, open-label Phase 2 trial which was initiated at a single site in 
the United States during the first quarter of 2025.  
In addition to setmelanotide, we have two earlier-stage investigational MC4R agonists in clinical development, 
RM-718, designed for weekly administration, and bivamelagon (formerly LB54640), an oral small molecule, which are 
each advancing in Phase 1 and 2 clinical trials, respectively. These investigational assets are designed to be highly selective 
for the MC4R and MC1R sparing and thereby not cause hyperpigmentation. We completed enrollment in our Phase 2 trial 
evaluating bivamelagon, in acquired hypothalamic obesity in the first quarter of 2025. With RM-718, we anticipate 
initiating Part C of our Phase 1 trial to evaluate this weekly MC4R agonist in patients with acquired hypothalamic obesity 
in the first quarter of 2025.  
We are leveraging what we believe is the largest known DNA database focused on obesity - with approximately 
100,000 sequencing samples as of December 31, 2024 - to improve the understanding, diagnosis and care of people living 
with severe obesity due to certain variants in genes associated with the MC4R pathway. Our sequencing-based 
epidemiology estimates show that each of these genetically-defined MC4R pathway deficiencies are considered rare 
diseases, according to established definitions based on patient populations. Our epidemiology estimates are approximately 
4,600 to 7,500 for U.S. patients in initial FDA-approved indications, including obesity due to BBS and biallelic POMC, 
PCSK1 or LEPR deficiencies. Our epidemiology estimates for the two more prevalent indications being studied in our 
Phase 3 EMANATE trial (SH2B1 and POMC/PCSK1) suggest that approximately 29,000 U.S. patients with one of these 
genetically driven obesities have the potential to respond well to setmelanotide. Similarly, our epidemiology estimates for 
patients with genetic indications who demonstrated an initial response following stage 1 of our Phase 2 DAYBREAK trial 
is approximately 65,300. All these patients face similar challenges as other patients with rare diseases, namely lack of 
awareness, resources, tests, tools and especially therapeutic options.  
We are working to expand access to IMCIVREE globally. 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 multiple field teams in the United States and Europe engaging with physicians who 
treat patients with severe obesity, and we plan to build out our own team in Japan in preparation for potential registration 
of setmelanotide for acquired hypothalamic obesity. We continue to bring together health care providers, patients and 
families with educational and awareness events. Our genetic testing programs fuel MC4R pathway research, disease 
education and awareness and patient finding. 
With 283 employees, including 76 employees in 11 countries outside of North America, as of February 1, 2025, 
an ever-expanding network of key opinion leaders, and an increasing number of identified, diagnosed and treated patients, 
we are focused on changing the paradigm for the treatment of rare MC4R pathway diseases. Our focused disease awareness 
and patient finding efforts fuel the key elements of our strategy, including: 
1. Prepare for potential global launch of IMCIVREE in hypothalamic obesity: With topline data in our Phase 
3 pivotal trial on track to be disclosed in the second quarter of 2025, we are focused on efficiently analyzing that 
data, and submitting regulatory filings in the United States, the EU and the United Kingdom – to be followed by 
a regulatory submission in Japan - and preparing for global commercialization, if approved. 
2. Continue to increase global access to IMCIVREE: With access for IMCIVREE achieved in more than 
15 countries in addition to the United States for BBS and/or POMC and LEPR deficiencies, we remain focused 
on community building programs, disease awareness and education efforts, patient finding and securing 

8 
reimbursement. We continue to seek market access for IMCIVREE on a country-by-country basis in Europe and 
additional international markets. 
3. Advance MC4R-focused pipeline:  Our clinical development programs are designed to expand the overall 
patient population that we believe may benefit from MC4R agonism, both in additional disease states and next 
generation assets. Life-cycle management is a key driver for advancing our pipeline. Bivamelagon and RM-718, 
which are being evaluated in the clinic for hypothalamic obesity, have composition of matter patent protection in 
the United States out to 2040 (with the possibility of patent term extension out to 2045) and 2036 (with the 
possibility of patent term extension out to 2041), respectively, provided, however, that in each case the maximum 
patent term extension is 14 years following initial FDA approval, so the ultimate patent term extension date could 
be earlier, depending on the first approval date for each product candidate. In addition to our pivotal trial 
evaluating setmelanotide in hypothalamic obesity, our Phase 3 EMANATE trial and our Phase 2 PWS trial with 
setmelanotide are ongoing, and therefore may add significant opportunity to the total addressable market for our 
first-generation MC4R agonist. In addition, we are advancing new product candidates for congenital 
hyperinsulinism (CHI), a rare genetic disease. 
 

9 
Market Overview 
Severe Obesity, Hyperphagia, and the MC4R Pathway 
Rare MC4R pathway diseases are distinct from general obesity. The hallmark characteristics of rare MC4R 
pathway diseases are severe obesity and hyperphagia, a pathological and insatiable hunger that drives a severe 
preoccupation with food and extreme food-seeking behaviors. Lifestyle interventions are not therapeutic in patients with 
these diseases because they fail to address the underlying genetic or acquired impairment of central energy regulation and 
satiety. 
Accordingly, the discovery that the MC4R pathway regulates both energy intake (hunger) and energy expenditure 
has made it an important target for therapeutics. Studies have shown that injuries to the hypothalamus region of the brain 
in patients with certain tumors impair MC4R signaling, leading to increased hunger, reduced energy expenditure and rapid 
onset of severe obesity. In addition to obesity due to BBS and POMC, PCSK1 or LEPR deficiencies, recent advances in 
genetic studies have identified several diseases characterized at least in part with hyperphagia and early-onset, severe 
obesity that appear to be the result of genetic variants affecting the MC4R pathway, including certain variants of the 
POMC, PCSK1, LEPR, SRC1 and SH2B1 genes, as well as MC4R deficiency obesity and deficiencies in many additional 
genes with strong or very strong relevance to the MC4R pathway. With a deeper understanding of this critical signaling 
pathway, we are taking a different approach to drug development by focusing on specific genetic variants and acquired 
injury affecting the MC4R pathway. We believe that this approach has the potential to provide clinically meaningful 
improvements in the treatment of rare obesity and hyperphagia by addressing lost function in the MC4R pathway. 
Rare MC4R Pathway Diseases 
The MC4R pathway has been the focus of extensive scientific investigation for many years. This neuro-endocrine 
pathway in the hypothalamus is a key signaling pathway responsible for regulating hunger,  caloric intake, and energy 
expenditure, which consequently affects body weight. It is known to be a critical component in the regulation of energy 
balance. The critical role of the MC4R pathway in weight regulation is supported by the observation that single gene 
variants at various points in this pathway may result in early-onset, severe obesity.  
The MC4R pathway is illustrated in the figure below. Under normal conditions, POMC neurons are activated by 
adiposity and satiety signals, including  the hormone leptin acting through the LEPR. POMC neurons produce a protein, 
which is processed by the PCSK1 enzyme, into melanocyte stimulating hormone, or MSH, the natural agonist, or activator 
of the MC4R. When upstream genetic variants, traumatic injuries or lesions disrupt this pathway, it can lead to insufficient 
MC4R activation and downstream signaling, the result of which can be hyperphagia, reduced energy expenditure and 
severe obesity. 

10 
The figure below also illustrates some of the genes that are upstream of the MC4R and the potential effect variants 
in those genes can have on the activation of the MC4R, which regulates food intake and energy expenditure.  
MC4R Agonism Development Targets: Upstream Deficiencies Affecting the MC4R Pathway 
 
AgRP, agouti-related protein; LEPR, leptin receptor; MC4R, melanocortin-4 receptor; MSH, melanocyte-stimulating hormone; ACTH, 
adrenocorticotropic hormone; PCSK1, proprotein convertase subtilisin/kexin-type 1; POMC, proopiomelanocortin. Reference: Yazdi FT et al. PeerJ. 
2015;3:e856. 
We are focused on developing our MC4R agonists, including our lead asset setmelanotide, as a precision 
treatment for certain rare MC4R pathway diseases. In addition to acquired hypothalamic obesity, congenital hypothalamic 
obesity and PWS, we are evaluating setmelanotide for the treatment of obesity due to variants in one of a number of genes 
associated with the MC4R pathway. Setmelanotide has the potential to restore lost function in this pathway by activating 
the intact MC4R-expressing neuron downstream of the genetic impairment. In this way, we believe setmelanotide may act 
as restorative therapy, to restore lost signaling of the MC4R pathway. 
Epidemiology Estimates of Rare MC4R Pathway Diseases 
While obesity is a global epidemic, we are focused on rare MC4R pathway diseases. Impairment of the MC4R 
pathway is characterized by hyperphagia and rapid-onset obesity or the presence of early-onset, severe obesity. Of the tens 
of millions of individuals with obesity in the United States, the U.S. Center for Disease Control (CDC) estimates that there 
are approximately 5 million individuals whose severe obesity had onset between the ages of 2 and 5 years old. The tables 
below summarizes the estimated prevalence for indications currently approved or under pivotal clinical investigation.  
These calculations rely on internal and proprietary sequencing data and current estimated responder rates to setmelanotide 
therapy, and they 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). 
 

11 
 
 
 
Approved by the U.S. FDA and authorized by the EC and United Kingdom’s MHRAa 
 
Estimated U.S. prevalence 
Estimated European prevalence 
Bardet-Biedl syndrome 
4,000 –  5,000b 
4,000 –  5,000b  
Obesity due to POMC or LEPR  
deficiency 
caused 
by 
biallelic 
variants in the POMC, PCSK1 or 
LEPR genes 
~600 – 2,500 
Similar prevalence as U.S.c  
 
a. 
Authorized by the EC and MHRA for use in patients 2 years of age and older. Approved by the FDA for use 
in patients 2 years of age and older with monogenic or syndromic obesity. 
b. For BBS, prevalence estimates vary between populations, from 1 in 100,000 in northern European 
populations with higher prevalence rates in some additional regions throughout the world. We estimate the 
number of patients with BBS in the United States is between 4,000 and 5,000, with a similar number in 
continental Europe and the United Kingdom (UK). These estimates are based on our patient identification 
efforts in the United States and Europe and our proprietary genetic sequencing data, as well as our belief that 
BBS, like most rare diseases, is underdiagnosed. We believe the BBS health care provider network in EU 
member states and the UK is particularly well-established and more advanced than in the United States, and 
based on field work, we believe there are approximately 1,500 patients diagnosed and being cared for at 
academic centers in Europe.  Applying these population-adjusted identified patient populations to the United 
States and other countries with comparable population genetics supports our epidemiology estimates.  
c. 
For POMC or LEPR deficiencies, we estimate European prevalence is similar to the United States. While 
our sequencing data include patients from the United States and Europe, at the time, we did not have a 
comparable number of sequencing samples from European countries, and these estimates are therefore based 
on applying relative population percentages to the Rhythm-derived estimates described above. 
Separately, in Canada, where IMCIVREE is approved for weight management in adult and pediatric patients 
6 years of age and older with obesity due to BBS or biallelic POMC, PSCK1 or LEPR deficiency, we estimated at the time 
of our filing for approval with Health Canada that there are approximately 300 – 400 individuals with BBS. This was 
based on data on file, a range of prevalence estimates for BBS in Canada between 1 in 125,000 to 1 in 160,000, and a 
population in Canada of 38,929,902 as of July 1, 2022, according to StatsCan. Also, our prevalence estimate accounted 
for a reported founder effect in the province of Newfoundland, where estimated prevalence is approximately 1 in 17,500 
(Forsythe E, Beales PL. Eur J Hum Genet. 2013;21(1):8-13). The prevalence of POMC, PCSK1, and LEPR deficiency 
obesity in Canada is not well characterized as very little data are available.  

12 
 
 
 
Setmelanotide currently being evaluated in Phase 3 trials 
 
Estimated U.S. population 
Estimated European population 
Acquired hypothalamic obesity  
5,000 – 10,000d 
3,500 – 10,000e  
Congenital hypothalamic obesity 
>1,000f 
>1,000f 
Obesity due to POMC insufficiency 
caused by heterozygous variants in 
the POMC or PCSK1 genes 
6,000g 
 Similar prevalence as U.S. g 
Obesity due to LEPR insufficiency 
caused by heterozygous variants in 
the LEPR gene 
4,000 g 
 Similar prevalence as U.S. g 
Obesity due to SRC1 deficiency 
caused by a variant in the NCOA1 
gene (SRC1 deficiency obesity) 
~20,000 g 
 Similar prevalence as U.S. g 
Obesity due to SH2B1 deficiency 
caused by a variant in the SH2B1 
gene or 16p11.2 deletion 
encompassing the SH2B1 gene 
(SH2B1 deficiency obesity) 
~23,000 g 
 Similar prevalence as U.S. g 
 
 
 
Setmelanotide currently being evaluated in Phase 2 DAYBREAK trial  
Obesity due a deficiency in the MC4R 
pathway caused by variants in the 
SEMA3 family, PHIP, TBX3 or 
PLXNA family  
~65,300g,h  
Similar prevalence as U.S.f  
 
d. For acquired hypothalamic obesity in the United States, our internal Company estimates are based on 
reported incidence of hypothalamic obesity following craniopharyngioma and long-term survival rates, (Zacharia, et al., 
Neuro-Oncology 14(8):1070–1078, 2012. doi:10.1093/neuonc/nos142; and Muller, et al., Neuro-Oncology 17(7), 1029–
1038, 2015 doi:10.1093/neuonc/nov044.) 
e. 
Our European prevalence estimate for acquired hypothalamic obesity is limited to the EU4 (Germany, 
France, Spain, Italy), UK and the Netherlands. The total 2020 population estimates for the six key countries (EU4, the 
Netherlands, and UK) of 339,295,304 was used to reach a final prevalence of 0.1-0.3 in 10,000 patients. In addition, we 
estimate the prevalence of acquired hypothalamic obesity in Japan to be approximately 5,000 to 8,000 based on our review 
of tumor registries and claims data.   
f. 
Epidemiology of congenital hypothalamic obesity is expected to be comparable between the United States 
and EU4 (Germany, France, Spain, Italy), United Kingdom and the Netherlands combined in the absence of specific 
regional data. Our internal Company estimate is driven mainly by septo-optic dysplasia (Garne, et al., European Journal 
of Medical Genetics 61(9):483–488, 2018. doi: 10.1016/j.ejmg.2018.05.010; and Cerbone, et al., EClinicalMedicine 19, 
2020. doi: 10.1016/j.eclinm.2019.11.017.). 
g. For patients with genetic variants of the MC4R pathway, 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 

13 
for these monogenic indications. For the four rare MC4R pathway diseases we are studying on the Phase 3 EMANATE 
trial (POMC insufficiency, LEPR insufficiency, SRC1 deficiency and SH2B1 deficiency), we believe that the patient 
populations in continental Europe and UK 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 sequencing data from European countries 
and these estimates are therefore based on applying relative population percentages to the Rhythm-derived estimates 
described above. 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 continue to expand with the addition of new genes, the addressable population faces the challenges 
of a rare disease population. 
h. As announced on December 6, 2023, during our ‘Update on MC4R Pathway Programs’ event for investors 
and analysts. U.S. prevalence estimates based on results from our URO genetic testing program with samples from more 
than 36,000 participants, classification of variants for pathogenic, likely pathogenic and 20% of VUS and applied to 
established estimate of approximately 5 million people in the United States with early-onset obesity; 1. van der Klaauw et 
al. Cell. 2019;176:729-742.e18. 2. Marenne et al. Cell Metab. 2020;31:1107-1119.e12. 3. Bamshad et al. Am J Hum 
Genet.1999;64:1550-1562. 4. Ackinci et al. J Clin Res Pediatr Endocrinol. 2019;11:341-349. 
Limitations of Current Therapies 
Although drugs approved for general obesity potentially can be used in patients with obesity and rare MC4R 
pathway diseases, other than IMCIVREE, all currently available products have limited efficacy and treat symptoms 
without addressing the underlying biology of MC4R impairment. 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 rare MC4R pathway diseases, these therapies also do not specifically 
address the impaired signaling in this central energy regulating pathway. Similarly, metabolic and bariatric surgery which 
has been shown to be quite effective in the general population with obesity, may be unsuccessful in patients with rare 
MC4R pathway diseases for the same reason. 
MC4R Pathway Program 
IMCIVREE® (setmelanotide) 
IMCIVREE is approved by the FDA to reduce excess body weight and maintain weight reduction long term in 
adult and pediatric patients aged 2 years and older with syndromic or monogenic obesity due to BBS, or POMC, PCSK1, 
or LEPR deficiency as determined by an FDA-approved test demonstrating variants in POMC, PCSK1, or LEPR genes 
that are interpreted as pathogenic, likely pathogenic, or VUS. The EC and United Kingdom’s MHRA have authorized 
setmelanotide for the treatment of obesity and the control of hunger associated with genetically confirmed BBS or 
genetically confirmed loss-of-function biallelic POMC, including PCSK1, deficiency or biallelic LEPR deficiency in 
adults and children 2 years of age and above. IMCIVREE also was approved by Health Canada, where it is indicated in 
adults and pediatric patients 6 years of age and older with impairments in the MC4R pathway due to genetic diseases, for 
the treatment of obesity and control of hunger in BBS or biallelic POMC, PCSK1, or LEPR deficiency.  
IMCIVREE is the only therapeutic specifically approved for patients with these diseases. As an MC4R agonist, 
IMCIVREE is designed to address impaired MC4R pathway activity arising due to genetic impairments upstream of the 
MC4R. IMCIVREE contains setmelanotide acetate, an MC4R 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 

14 
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 MC4R pathway. People living with obesity due to POMC, PCSK1 or LEPR deficiency 
struggle with hyperphagia, an extreme, insatiable hunger, beginning at a young age and resulting in early-onset, severe 
obesity. 
Bardet-Biedl syndrome 
Bardet-Biedl syndrome (BBS) is a life-threatening, ultra-rare orphan disease. BBS is a disease that causes 
hyperphagia and severe obesity beginning in early childhood, as well as vision loss, polydactyly, kidney abnormalities, 
and other signs and symptoms. For patients with BBS, hyperphagia and obesity can have significant health consequences. 
BBS is part of a class of disorders 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, including in the MC4R pathway, is thought to contribute 
to hyperphagia and obesity in BBS. BBS is a genetically heterogeneous disease that has been associated with mutations in 
29 genes, to date. All result in a similar syndrome of clinical manifestations. Recent scientific studies identify deficiencies 
affecting the MC4R pathway as a potential cause of the hyperphagia and obesity associated with BBS, and demonstrate 
that an MC4R agonist can directly impact these symptoms.  
Pivotal Phase 3 Clinical Trial Evaluating Setmelanotide in BBS  
Approvals and marketing authorizations for BBS in the United States, the EU, the United Kingdom, and Canada 
were based on data from our pivotal Phase 3 clinical trial of setmelanotide in patients with BBS. As we first reported in 
December 2020, the trial met its primary endpoint and all key secondary endpoints, with statistically significant and 
clinically meaningful reductions in weight and hunger at 52 weeks on therapy.  
The pivotal data that formed the basis for IMCIVREE’s approvals in BBS were published in the peer-reviewed 
journal The Lancet Diabetes and Endocrinology in November 2022. As previously disclosed, treatment with setmelanotide 
resulted in significant weight and hunger reductions after one year of treatment among patients with BBS. The primary 
endpoint was achieved by 32.3% (95% confidence interval (CI), 16.7%, 51.4%; p=0.0006) of patients ≥12 years old, all 

15 
of whom were patients with BBS. Data highlights among patients with BBS (n=32) after 52 weeks of setmelanotide 
include: 
• 
Fifteen (15) patients ≥18 years achieved a mean (SD) percent reduction in BMI of -9.1% (6.8%; 95% CI, 
−13.4%, −4.8%); 
• 
Fourteen (14) patients <18 years achieved a mean (SD) change in BMI Z score of −0.8 (0.5; 95% CI, −1.0, 
−0.5), and 12 patients (85.7%) achieved ≥0.2-point reduction in BMI Z; and 
• 
Fourteen (14) patients ≥12 years who reported hunger scores achieved reduction of -30.5% in maximal 
hunger score. 
The safety results observed in this study were consistent with that observed with setmelanotide in previous clinical 
trials in patients with other rare MC4R pathway diseases. Skin hyperpigmentation (n=23; 60.5%) was the most common 
adverse event (AE). Two patients experienced serious AEs, neither of which was considered related to setmelanotide 
treatment.  
Pivotal Phase 3 Clinical Trials Evaluating Setmelanotide in Biallelic 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% were adults 
and 38% were aged 16 years or younger. In Study 1, 50% of patients were female, 70% were White, and the median 
baseline BMI was 40.0 kg/m2 (range: 26.6-53.3). In Study 2, 73% of patients were female, 91% were White, and the 
median baseline BMI was 46.6 kg/ m2 (range: 35.8-64.6). 
In the POMC/PCSK1 study, 80% of patients with obesity due to POMC or PCSK1 deficiency met the primary 
endpoint, achieving a ≥10% weight loss after one year of treatment with IMCIVREE. In the LEPR study, 46% of patients 
with obesity due to LEPR deficiency met the primary endpoint by achieving a ≥10% weight loss after 1 year of treatment 
with IMCIVREE. 
Phase 3 Trial Results in Patients Between 2 Years Old and Younger than 6  
The hyperphagia and severe obesity of rare, genetically-caused MC4R pathway diseases can present early in life. 
Therefore, we believe access to treatment earlier in life will lead to better outcomes for children. In 2023, we completed 
our 52-week, Phase 3 pediatrics trial and demonstrated that setmelanotide met the primary endpoint and achieved clinically 
meaningful weight reduction in patients within this age range. This trial was a multi-center, one-year, open-label trial in 
pediatric patients with obesity due to biallelic POMC, PCSK1 or LEPR deficiency or a clinical diagnosis of BBS with 
genetic confirmation. The primary efficacy endpoint was a responder analysis, based on the proportion of patients who 
experience a decrease from baseline in BMI-Z score of ≥0.2. 
These data were published in the peer-reviewed journal The Lancet Diabetes & Endocrinology in November 2024:  
• 
83 percent of all patients (10 of 12) achieved ≥ 0.2 reduction in BMI-Z score from baseline to week 52;  
• 
18 percent mean reduction from baseline in BMI at week 52 (N=12);  
• 
3.04 mean reduction from baseline in BMI-Z score at week 52 (N=12); and 

16 
• 
The safety profile was consistent with past trials evaluating setmelanotide. 
Based on these data, IMCIVREE received authorization as the first-ever precision medicine in the EU for control 
of hunger and treatment of obesity in adults and children as young as 2 years old, living with BBS or POMC, PCSK1, or 
LEPR deficiency on July 31, 2024. The UK’s MHRA also expanded marketing authorization for IMCIVREE to include 
patients as young as 2 years with BBS or POMC, PCSK1 or LEPR deficiency on December 3, 2024. In addition, on 
December 20, 2024, the FDA also approved an expanded indication for IMCIVREE to include children as young as 2 years 
old. 
 
Development of Setmelanotide for Additional Indications 
Acquired Hypothalamic Obesity 
We are on track and plan to read out topline data from our ongoing Phase 3 clinical trial evaluating setmelanotide 
as a treatment for acquired hypothalamic obesity in the second quarter of 2025. Acquired hypothalamic obesity is 
characterized by rapid-onset, severe obesity caused by injury to the hypothalamic region which may impair MC4R pathway 
signaling leading to hyperphagia, decreased energy expenditure, and severe obesity. It occurs most frequently after 
hypothalamic damage resulting from craniopharyngioma or other intracranial tumor, traumatic brain injury, stroke, or 
surgical resection or radiation of brain tumors. There are no known approved therapies for this disease.   
In 2022, setmelanotide demonstrated potential to transform the care of individuals living with the rapid onset of 
extreme weight gain of hypothalamic obesity with clinical data that suggested setmelanotide treatment resulted in 
significant, durable weight loss. On the basis of these results, we requested, and setmelanotide received, Breakthrough 
Therapy Designation from the FDA for the treatment of acquired hypothalamic obesity in 2022.  
Lesions of the hypothalamus can derive from various types of tumors (e.g., craniopharyngiomas, gliomas, 
pituitary adenomas, hamartomas) or may be caused by surgeries and/or 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 acquired hypothalamic obesity display a 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 completed enrollment in our global Phase 3, 120-patient trial of setmelanotide in acquired hypothalamic 
obesity with patients aged 4 years or older with hypothalamic obesity randomized 2:1 to setmelanotide therapy or placebo 
for a total of 60 weeks, including up to eight weeks for dose titration. We enrolled a total of 131 patients in this trial; 
however, as discussed with both the FDA and the EMA, we expect our planned regulatory submissions will be based on 
data from the pivotal, 120-patient cohort. The primary endpoint is the percent change in BMI after 52 weeks on a 
therapeutic regimen of setmelanotide versus placebo. We are on track to report top-line study results in the second quarter 
of 2025. 
On January 10, 2025, we announced that we completed enrollment in a supplemental cohort of 12 Japanese 
patients, which we added to our global Phase 3 trial in acquired hypothalamic obesity. Based on discussions with Japan’s 
Pharmaceuticals and Medical Devices Agency (PMDA), we plan to use data from this cohort as part of our planned 
registration package seeking approval from Japan’s Ministry of Health, Labor and Welfare. In addition to efficacy data, 
we will plan to collect and submit pharmacokinetic (PK) data from Japanese patients in an effort to expedite the typical 
pathway of collecting such data in an earlier-stage trial in Japanese subjects. Our review of certain tumor registries and 
claims data in Japan point to a higher per-capita prevalence and incidence rate of this disease than in Europe and the United 
States. We estimate there are approximately 5,000 to 8,000 patients in Japan with hypothalamic obesity.  
The pivotal Phase 3 trial follows positive efficacy results from our 16-week Phase 2 trial, as well as data 
demonstrating durable and deepening weight loss in patients who transitioned from the Phase 2 trial to our open-label, 
long-term extension trial. We enrolled 18 patients in its open-label, 16-week Phase 2 trial designed to evaluate 

17 
setmelanotide in acquired hypothalamic obesity in patients with a body mass index (BMI) ≥95th percentile (children 6 to 
<18 years) or ≥35 kg/m2 (adults ≥18 years). The primary endpoint was the proportion of patients who achieved a 5% or 
greater reduction in BMI after 16 weeks of treatment. Hunger was also assessed daily, as self-reported by individual 
patients. These data were published in the peer-reviewed journal The Lancet Diabetes & Endocrinology in April 2024. In 
this trial, we observed a consistent reduction in body weight and hunger in all adherent patients. Results demonstrated: 
• 
89% (16 of 18) of patients achieved the primary endpoint; 
• 
78% (14 of 18) of patients achieved a 10% or greater reduction in BMI at 16 weeks; 
• 
Mean percent reduction in BMI was 15% from baseline; 
• 
In pediatric patients (n=13), the mean (standard deviation [SD]) BMI Z score at Week 16 was 2.7 (1.3), a 
reduction of 1.3 (1.0) points from baseline; and 
• 
Mean (SD) most hunger score at baseline was 6.6 (1.6), compared with 3.7 (2.5) at Week 16, for a reduction 
of –2.9 (2.3) points or 45% for patients ≥12 years of age (n=11). 
The publication also included preliminary data from our long-term extension of the Phase 2 study that were 
disclosed at ObesityWeek® 2023. These data show patients with hypothalamic obesity (n=12) achieved mean BMI 
reduction of approximately 26% at one year on setmelanotide treatment. Consistent with prior experience, setmelanotide 
was generally well tolerated. The most common adverse events (AEs) in the primary trial included nausea (61.1%), 
vomiting (33.3%), skin hyperpigmentation (33.3%), diarrhea (22.2%), and COVID-19 (22.2%). Two patients discontinued 
due to AEs and a third patient was non-compliant. No new safety concerns were observed during the long-term extension 
trial. 
In addition, a poster presentation was delivered at ObesityWeek® in San Antonio, TX, in November 2024, with 
new, real-world data showing improvements in hunger scores and BMI reductions in adult patients in France with acquired 
hypothalamic obesity who were treated with setmelanotide. These data were generated from eight patients with acquired 
hypothalamic obesity age 18 years or older with a previous resection of a tumor in the hypothalamus who were being 
treated with setmelanotide for three months or longer in five different hospitals in France under pre-marketing early access 
authorization. We believe these data were particularly encouraging because they suggest that setmelanotide has the 
potential to improve clinical outcomes in adults with acquired hypothalamic obesity. Mean duration between the time the 
patients had their tumor resected and setmelanotide treatment began was 12.1 years. Results from the analysis included: 
• 
Mean BMI reduction from baseline: 
o 
5.6% (-2.3 kg/m2) after one month of treatment (N=8); 
o 
12.8% (-5.7 kg/m2) after three months of treatment (N=8); and 
o 
21.3% (-7.6 kg/m2) after six months of treatment (n=5); 
• 
At three months of treatment, all patients had achieved a reduction in weight of 5% or more; 
• 
All eight patients showed a reduction in three or more categories of hunger score (daily average hunger, daily 
most hunger, daily least hunger, daily morning hunger) from baseline as assessed by questionnaires; and 
Congenital hypothalamic obesity  
Congenital hypothalamic obesity is a rare disease caused by certain brain abnormalities that may impair the 
function of the MC4R pathway, which regulates satiety or food intake and energy expenditure. It is a severe, refractory 
obesity that is underdiagnosed and not widely understood with high unmet need as there are no approved treatment options. 

18 
It is it is often associated with pituitary and hypothalamic dysfunction. Unlike acquired hypothalamic obesity – which is 
known to be caused by certain brain tumors and their treatment – there is little recognition and or understanding of 
congenital hypothalamic obesity and its different causes, as the connection between the severe obesity and MC4R pathway 
in the hypothalamus may not be evident.   
An impairment in the MC4R pathway can lead to reduced energy expenditure and hyperphagia and, consequently, 
severe obesity. Rare diseases that may cause congenital hypothalamic obesity include septo-optic dysplasia (or de Morsier 
syndrome), optic nerve hypoplasia, multiple pituitary hormone deficiency (also known as combined pituitary hormone 
deficiency) and pituitary stalk interruption syndrome. Each of these diseases is considered rare and between 12% and 40% 
of patients with these diseases may have congenital hypothalamic obesity. We estimate the prevalence of congenital 
hypothalamic obesity to be in excess of 1,000 patients in the United States and in excess of 1,000 patients in Europe.  
U.S. and European experts have highlighted an urgent, unmet medical need for therapeutic options for patients 
with congenital hypothalamic obesity, as none are approved for this heterogenous patient population.  
On November 19, 2024, we announced a poster presentation delivered during the 62nd annual meeting of the 
European Society for Paediatric Endocrinology (EPSE) in Liverpool, England, which detailed two case reports from 
patients with congenital hypothalamic obesity treated with setmelanotide through our pre-approval, early-access program 
for setmelanotide in France. The poster details included:   
• 
Female, age 15, with septo-optic dysplasia as cause of hypothalamic obesity, achieved a body weight 
decrease of 9.6% from baseline (94 kg) at month 3 and BMI-Z score change from 3.1 at baseline to 2.8; and 
• 
Male, age 9, with pituitary stalk interruption syndrome (PSIS) as cause of hypothalamic obesity, achieved a 
body weight decrease of 5.2% from baseline (64 kg) at month 3 and BMI-Z score change from 3.7 at baseline 
to 3.5.  
Based on these case reports, in the first quarter of 2025 we added a 34-week substudy, which is designed to 
evaluate setmelanotide in 39 patients with congenital hypothalamic obesity aged 4 years and older as a protocol amendment 
to our ongoing Phase 3 trial evaluating setmelanotide in patients with acquired hypothalamic obesity. The substudy in 
congenital hypothalamic obesity is independent from the pivotal Phase 3 trial cohort in acquired hypothalamic obesity.  
Clinical Development to Address Additional MC4R Pathway Diseases 
We also are advancing a broad clinical development program evaluating setmelanotide, and we are leveraging 
the largest known DNA database focused on obesity - with approximately 100,000 sequencing samples as of 
December 2024 - to improve the understanding, diagnosis and care of people living with hyperphagia and severe obesity 
due to certain variants in genes associated with the MC4R pathway. There remains a significant unmet need with no 
effective therapeutic options for patients with these rare MC4R pathway diseases, and we believe setmelanotide has the 
potential to address the hyperphagia and severe obesity associated with these rare genetic diseases.   
Phase 3 EMANATE Trial 
The ongoing pivotal Phase 3 EMANATE clinical trial is a randomized, double-blind, placebo-controlled trial, 
designed to evaluate setmelanotide therapy over a 52-week period in four independent substudies in patients with obesity 
due to: a heterozygous variant of the POMC/PCSK1 genes or LEPR gene and certain variants of the SRC1 gene or the 
SH2B1 gene.  
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 MC4R pathway dysfunction. Obesity due to rare 
variants in the SRC1 gene is an autosomal dominant disorder that is characterized by early-onset severe obesity and 
hyperphagia, as SRC1 variants found in individuals with severe obesity significantly impaired leptin-induced POMC 
expression (Yang et al 2019, Nat Comm. 10, Article 1718). Specifically, SRC1 is a transcriptional coactivator that has links  
 

19 
to both the leptin receptor and to POMC. When the leptin receptor is activated, SRC1 is activated through a cascade of 
events that then drives the expression of POMC. Individuals who have heterozygous loss-of-function variants in their 
SRC1 genes can have insufficient leptin receptor activation of the MC4R pathway as a result of decreased POMC 
expression. This decreases the amount of available MSH to activate the MC4R, consequently resulting in hyperphagia and 
obesity in these individuals. Obesity due to variants in the SH2B1 gene is a rare genetic disease that is characterized by 
early-onset severe obesity, hyperphagia, hyperinsulinemia, and reduced final height. SH2B1 variants 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 removes 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. 
On January 10, 2025, we announced enrollment completion in this 52-week trial. We consider the two most 
encouraging substudies to be SH2B1 (n=121) and POMC and/or PCSK1 (n=79). The epidemiology estimates for these 
two genetic indications suggest that approximately 29,000 U.S. patients with one of these genetic deficiencies have the 
potential to respond to setmelanotide. The epidemiology for the additional two genetic indications enrolled in this trial, 
SRC1 (n=73) and LEPR (n=23), suggest as many as 24,000 U.S. patients with one of these genetic deficiencies may have 
the potential to respond to setmelanotide. However, the vast majority of genetic variants of the SRC1 gene are classified 
as VUS and mostly benign; similarly, pathogenic or likely pathogenic variants of the LEPR gene are ultra-rare. The trial 
design with four independent substudies allows for independent data readouts and potential registration for each genetic 
cohort on its own. As the SRC1 and LEPR substudies are under-enrolled and therefore underpowered, it is likely that we 
would need to complete additional studies in order to seek regulatory approval for these genetic indications. We believe 
the SH2B1 and POMC/PCSK1 substudies are sufficiently enrolled and powered to seek registration, pending success. The 
primary endpoint for each substudy is the difference in mean percent change in BMI from baseline to 52 weeks in 
setmelanotide arm compared to placebo arm. We anticipate reporting topline data  in the first half of 2026. 
Proof of Concept Achieved in Exploratory Phase 2 Basket Study 
In January 2021, we announced proof-of-concept data from our exploratory Phase 2 Basket Study in multiple 
patient cohorts of patients with severe obesity due to a variant in one of the two alleles in the POMC, PCSK1, or LEPR 
genes (PPL HET obesity), as well as the SRC1 and SH2B1 genes. We subsequently furnished updated data in multiple 
presentations at medical meetings throughout 2021. The exploratory Phase 2 Basket Study was an open label study 
designed to evaluate setmelanotide in patients with obesity defined as 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 variant. The primary endpoint of the study was the percent of patients in each subgroup showing 
at least a 5% loss of body weight over three months (such patients are referred to as clinical responders for this study). 
PPL HET Obesity (POMC, LEPR, PCSK1) highlights included: 
• 
Overall, 12 of 35 patients (34.3%) achieved the primary endpoint. This full analysis includes six patients who 
withdrew early; 
 
• 
Mean reduction from baseline in body weight over three months across all 35 patients was -3.7%, 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 over three months was -10.1%. 
 
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 on published data as being pathogenic, likely pathogenic, likely 
benign or benign, or classified as a variant of unknown significance or VUS. As genetics of obesity remains an emerging 

20 
field, the vast majority of variants in genes associated with the MC4R pathway are classified as VUS. 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. 
• 
Patients with PPL 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%) with a pathogenic or likely pathogenic variant achieved greater than 5% 
weight loss over three months; 
 
• 
Four of eight patients (50.0%) with the N221D variant of the PCSK1 gene achieved greater than 5% weight 
loss over three months; and 
 
• 
Four of 19 patients (21.1%) with a variant of unknown significance (VUS) achieved greater than 5% weight 
loss over three months. 
 
In September 2021, we presented updated interim data from the SRC1 and SH2B1 cohorts at the at the 59th 
Annual European Society for Paediatric Endocrinology (ESPE) Meeting. The data presented were based on an interim 
analysis of patients who completed 12 weeks of therapy. These presentations included analyses that showed setmelanotide 
achieved clinically meaningful weight loss or BMI Z reduction in 30% (9 of 30) of study participants with obesity due to 
variants of the SRC1 gene and clinically meaningful weight loss or BMI Z reduction in 43% (15 of 35) of study participants 
with obesity due to variants of the SH2B1 gene, including 16p11.2 chromosomal deletions. 
Specifically, in the SRC1 cohort, a total of 30 patients with obesity and deficiency in the SRC1 gene were enrolled 
in the full analysis set of this study. These patients had a mean BMI of 45.4 kg/m2 or BMI Z of 3.0 at baseline. Highlights 
of these data, as of a cut-off date of March 16, 2021, include: 
• 
Nine of 30 (or 30%) of patients achieved a clinically meaningful response to setmelanotide at three months, 
as defined by weight loss of 5% or greater from baseline, or for patients under 18 years old, a reduction of at 
least 0.15 in BMI Z score: 
 
o 
In adult patients 18 years or older, six of 20 (or 30%) achieved 5% or greater weight loss at three months; 
 
o 
In patients younger than 18 years, three of 10 (or 30%) achieved a BMI Z reduction of 0.15% or more 
at three months. 
 
• 
Across all enrolled patients, the mean overall weight loss from baseline to three months among patients 
18 years and older (a sample of 20) was -4.0% (a standard deviation of 3.3%), and the mean overall BMI Z 
score reduction from baseline to three months among patients younger than 18 years (n=10) was -0.21 (a 
standard deviation of 0.23). 
In addition, these interim data showed a clear separation between patients who responded to setmelanotide 
treatment at three months and those who did not: 
• 
The mean body weight reduction for adult patients who responded (n= 6) was 7.9% (90% confidence interval 
(CI), −9.7 to −6.0), as compared to 2.3% (90% CI, −3.2 to −1.4) for adult patients who did not respond (a 
sample of 14); 
 
• 
The mean BMI Z reduction for patients younger than 18 years who responded (n= 3) was 0.48 (90% CI, 
−0.95 to −0.01), as compared to 0.09 (90% CI, −0.11 to −0.07) for those who did not respond (n= 7). 

21 
In the SH2B1 cohort, a total of 35 patients with obesity and 16p11.2 deletions that include the SH2B1 gene or 
deficiency in the SH2B1 gene were enrolled in the full analysis set of this study. These patients had a mean BMI of 
47.2 kg/m2 or BMI Z of 3.6 at baseline. Highlights of these interim data, as of a cut-off date of March 16, 2021, include: 
• 
Fifteen of 35 (or 42.9%) of patients achieved a clinically meaningful response to setmelanotide at three 
months, as defined by weight loss of 5% or greater from baseline, or for patients under 18 years old, a 
reduction of at least 0.15 in BMI Z score: 
 
o 
In patients 18 or older, eight of 22 (or 36.4%) achieved 5% or greater weight loss at three months; 
o 
In patients younger than 18 years, seven of 13 (or 53.8%) achieved a BMI Z reduction of 0.15% or more 
at three months. 
 
Across all enrolled patients, the mean overall weight loss from baseline to three months among patients 18 years 
and older (n= 22) was -3.1% (a standard deviation of 3.9%), and the mean overall BMI Z score reduction from baseline to 
three months among patients younger than 18 years (n= 13) was -0.15 (a standard deviation of 0.13). In addition, the 
interim data showed a clear separation between patients who responded to setmelanotide treatment at three months and 
those who did not: 
• 
The mean body weight reduction for adult patients who responded (n= 8) was 7.2% (90% CI, −8.6 to −5.8), 
as compared to 0.8% (90% CI, −1.9 to 0.3) for adult patients who did not respond (n= 14); 
 
• 
The mean BMI Z reduction for patients younger than 18 years who responded (n= 7) was 0.25 (90% CI, 
−0.29 to −0.21), as compared to 0.03 (90% CI, −0.08 to 0.02) patients younger than 18 years who did not 
respond (n= 7). 
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.  
Phase 2 DAYBREAK trial  
In 2024, we completed our Phase 2 DAYBREAK trial, a signal- finding study with a two-stage design, that 
successfully identified six cohorts of interest for further study. We believe the DAYBREAK trial was the most 
comprehensive Phase 2 trial ever initiated in rare MC4R pathway diseases. This trial was designed to evaluate 
setmelanotide in patients with hyperphagia and severe obesity caused by variants in one of 31 pre-identified genes known 
to have strong relevance to the MC4R pathway.  
Stage 1 of the trial ruled out several genes for further exploration based on patient prevalence or lack of response. 
We designed Stage 1 to evaluate setmelanotide in patients who carry a confirmed variant in one or more genes with strong 
or very strong relevance to the MC4R pathway. This first stage of the study consisted of a 16-week open-label treatment 
period; patients 18 years or older who achieved a body mass index (BMI) at least 3% less than the Baseline BMI at the 
end of Stage 1 and patients <18 years old who achieved a BMI at least 3% less than the Baseline BMI or a decrease in 
BMI Z-score of at least 0.05 at the end of Stage 1 were eligible for enrollment in the second stage of the study.  
A total of 49 patients who completed Stage 1 with a response to setmelanotide (as detailed below) were 
randomized into Stage 2 of the trial. Stage 2 was a 24-week, double-blind, placebo-controlled withdrawal study. These 
patients were stratified into genetically defined cohorts and randomized 2:1 to receive setmelanotide or placebo. After 
analyzing the results from Stage 2, we deemed the following genes or gene families to merit further study with MC4R 
agonism: SEMA3 family, PHIP, and TBX3 or PLXNA family.  

22 
On November 4, 2024, we presented topline data from the DAYBREAK trial at ObesityWeek® 2024 in San 
Antonio, Texas. Results from Stage 2 showed: 
• 
A significantly higher proportion of patients in the setmelanotide arm achieved or maintained 5% BMI 
reduction from baseline through the end of Stage 2 compared with the placebo arm (84.4% vs. 29.4%, 
p=0.001); a -12.4% mean percent BMI reduction was observed for all patients (n=29) on continuous 
setmelanotide therapy of 40 weeks; 
• 
Change in BMI between baseline and the end of stage 2 was variable between gene cohorts, with the 
most consistent pattern of response seen in patients with PHIP variants.  
• 
Other encouraging responses were observed from the SIM1, MAGEL2, PLXNA(1-4), and SEMA3(A-
G) genes; and 
• 
Setmelanotide was well tolerated with no new safety concerns. 
During our “Update on MC4R Pathway Program” event on December 6, 2023, we announced data from the 
Stage 1 open-label part of DAYBREAK, which demonstrated potential efficacy in patients in multiple genetically-defined 
cohorts. We presented data from the full analysis set for DAYBREAK, which included 164 patients. A total of 112 patients 
completed the 16-week Stage 1 of the Phase 2 trial, with 52 patients who discontinued. The rates of response from Stage 
1 of the trial were:  
• 
30% of patients (12 of 40) with variants in the SEMA3 gene cohort; 
• 
35.6% of patients (16 of 45) with variants in the PLXNAs gene cohort; 
• 
56.3% of patients (9 of 16) with variants in the PHIP gene cohort; 
• 
40% of patients (2 of 5) with variants in the TBX3 gene cohort; 
• 
30% of patients (3 of 10) with variants in the MAGEL2 gene cohort; and 
• 
25% of patients (5 of 20) with variants in the SIM1 gene cohort.  
 
For those who completed Stage 1, the rates of response of patients who achieved a BMI reduction of greater than 
5% from a post-hoc analysis were:  
• 
44.4% of patients (12 of 27) with variants in the PLXNs gene cohort; 
• 
61.5% of patients (16 of 26) with variants in the SEMA3 gene cohort; and 
• 
69.2% of patients (9 of 13) with variants in the PHIP gene cohort. 
 
We believe these data and analyses from DAYBREAK provide valuable insight into the MCR4 pathway, and we 
will continue our work to better understand which gene variants have loss of function and maybe disease causing as 
opposed to those variants which are benign. We believe this work will allow us to identify more accurately patients who 
may respond to MC4R agonism. We may continue clinical development in these genetic indications with bivamelagon 
and/or RM-718.  
Phase 2 Trial in Prader-Willi Syndrome 
Prader-Willi syndrome (PWS) is a rare genetic disorder that results in a number of physical, mental and behavioral 
problems. Key features of PWS include an excess weight gain due to a combination of low resting energy expenditure and 
a severe, constant hyperphagia with onset in early-mid childhood. There are currently no approved therapies that 
effectively reduce the extreme hyperphagia or address low resting energy expenditure experienced by patients with PWS, 
which, if not managed by stringent food restrictions and environmental controls, often results in life-threatening obesity. 
Approximately 20,000 people in the United States and approximately 400,000 people worldwide are estimated to be living 
with this disease. Currently, there are no approved therapies for the treatment of PWS. 

23 
While the underlying etiology of the hyperphagia and excess weight gain in PWS is multifactorial, there remains 
a logical biological justification for MC4R agonism in this patient population. The critical chromosomal region relevant 
for PWS contains genetic regions that may impact signaling within the MC4R pathway. Notably, deletions in this region 
have been shown to be associated with decreased expression of PCSK1, which encodes a key prohormone convertase 
enzyme in the MC4R pathway.  Relevant mouse models recapitulate the hyperphagia phenotype seen in PWS (Polex-Wolf 
J et al 2018). Disruption of MAGEL2 expression, a gene within the PWS region, leads to defective leptin sensing in POMC 
neurons (Mercer et al. PLoS Genet. 2013;9:e1003207. 7. Pravdivyi et al. Hum Mol Genet. 2015;24:4276-4283). 
Interestingly, there was a potential efficacy signal in some patients with a MAGEL2 variant in our Phase 2 DAYBREAK 
trial (Ortiz et al 2024). Finally, patients with PWS may have a reduced response to leptin on POMC neurons and 
consequently reduced MC4R pathway activity (Miller 2020). We believe setmelanotide, a potent MC4R agonist, has the 
potential to restore signaling and regulation of hunger, energy expenditure, and weight. 
In 2016, we completed a Phase 2 trial that evaluated setmelanotide in patients [N=40] with PWS 16-65 years of 
age. The study had co-primary endpoints of weight and hyperphagia after 4 weeks of placebo or one of three arms on 
setmelanotide therapy (0.5mg, 1.5mg or 2.5mg). No statistically significant treatment differences were observed for the 
co-primary endpoints. The AEs reported in this study were consistent with those reported in other setmelanotide trials. 
The most common AEs reported thought to be related to setmelanotide were injection site reactions.   
On January 10, 2025, we announced our plan to initiate a new, 26-week, open-label Phase 2 trial evaluating 
setmelanotide for treatment of PWS. Unlike the design of our earlier trial, this new trial design calls for an increased dose 
of setmelanotide and longer duration of administration. We plan to enroll up to 20 patients with PWS and obesity aged 6 
to 65 years old. Patients will be dose escalated up to 3 mg/day (ages 6 to <12) and up to 5 mg/day as tolerated (ages 12-65) 
and will receive a daily subcutaneous dose of setmelanotide. The primary endpoints are safety and tolerability. Key 
secondary endpoints will assess weight, hyperphagia, behavior and pharmacokinetics. This trial is being conducted at a 
single site in the United States.  
Weekly Formulation of Setmelanotide 
In collaboration with Camurus AB, or Camurus, we have developed a once-weekly, long-acting formulation of 
setmelanotide using FluidCrystal® technology. When injected subcutaneously, aqueous body fluid may be absorbed by 
the excipient lipid phase, which may then form a gel-like depot consisting of liquid crystals formed in situ leading to slow 
diffusion of setmelanotide from the depot. While we believe that this formulation may be more convenient and less 
burdensome than setmelanotide, which is a once-daily administration, for patients and their families, we have paused 
development in favor of advancing RM-718. In the event RM-718 shows positive efficacy and safety results, we will 
discontinue development of the weekly formulation of setmelanotide. Concurrently, we are engaging with applicable 
regulatory authorities to address the impact of our discontinuing development of the weekly formulation of setmelanotide, 
which was a component of our pediatric investigation plan, or PIP, in the EU (and the United Kingdom) and in 
January 2025 we submitted a request to modify the PIP to remove elements related to the weekly formulation and we 
expect to receive a decision sometine in Q2 2025.   
We have completed one Phase 3 trial evaluating the weekly formulation of setmelanotide in patients with rare 
MC4R pathway diseases. This weekly switch trial was a randomized, double-blind switch trial in patients with obesity due 
to biallelic or heterozygous POMC, PCSK1 or LEPR deficiency or a clinical diagnosis of BBS with genetic confirmation, 
who were previously enrolled in our long-term, open-label extension trial. Patients were randomized 1:1 to receive once-
weekly setmelanotide and once-daily placebo, or once-daily setmelanotide and once-weekly placebo for 13 weeks. 
Following the 13-week randomized treatment period, patients crossed over to an open-label, 13-week study in which all 
patients  received once-weekly setmelanotide. The study was intended to provide detailed pharmacokinetic 
characterization of the weekly formulation.  
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. It is noteworthy that the pattern of effects differed among each of the other MC4R therapies, 

24 
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 adverse events, or 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. 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 only infrequently led to clinical trial discontinuation. 
Over the course of our clinical development program, a total of 926 patients who participated in our trials have 
received the daily or weekly formulation of setmelanotide, including 24 patients who had been on setmelanotide therapy 
for more than five years, as of November 24, 2024 (excluding commercial therapy):  
 
 
  
  
Duration of   
Setmelanotide Therapy  
 
Number of patients 
<1 year  
678 
>1 year  
248 
>2 years  
168  
>3 years  
119 
>4 years  
57 
>5 years  
24 
Total  
926  
 
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 approximately half of the 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. 

25 
Overall, the most common AEs reported among setmelanotide treated patients in our clinical trials have been skin 
hyperpigmentation, injection site reactions, nausea, headache, vomiting, diarrhea and decreased appetite. 
Life Cycle Management and Pipeline Expansion 
In 2024, we made significant strides in our development of two new clinical programs designed to expand our 
MC4R agonist product portfolio. RM-718 and bivamelagon are being evaluated in hypothalamic obesity in Phase 1 and 2 
trials, respectively. In addition, we are advancing potential candidates for CHI, a rare genetic disease. 
Bivamelagon, an oral MC4R agonist  
On January 4, 2024, we announced that we entered into a global licensing agreement with LG Chem, Ltd., or 
LGC, a leading global company headquartered in South Korea that specializes in life sciences as one of its core businesses, 
for bivamelagon, an investigational oral small molecule MC4R agonist now in a Phase 2 clinical trial. The development 
of an effective oral therapy for treating MC4R pathway diseases has been a major goal for the industry and we believe the 
early data from LGC suggests bivamelagon has the potential to address MC4R pathway diseases without 
hyperpigmentation or cardiovascular side effects. We believe our deep developmental experience and global commercial 
presence uniquely position us to develop this molecule with the goal of offering a portfolio of treatment options to patients 
struggling with hyperphagia and severe obesity enabling the treatment that is right for them.  
In a Phase 1 trial in healthy overweight adults, bivamelagon demonstrated dose-dependent weight reduction. 
Bivamelagon also demonstrated favorable safety results in the trial, with no changes in blood pressure or heart rate 
observed and no hyperpigmentation observed. In addition, bivamelagon has received orphan drug designation from FDA 
for the treatment of LEPR deficiency. 
We completed enrollment in our Phase 2 trial evaluating bivamelagon in acquired hypothalamic obesity in the 
first quarter of 2025. The Phase 2 trial is a randomized, placebo-controlled, double-blind study to assess the effect of 
bivamelagon on safety, weight reduction, hunger, and quality of life measures in patients 12 years of age and older (N=28) 
with acquired hypothalamic obesity. Patients will take an oral daily dose of either bivamelagon (low, middle, or high dose) 
or placebo for 14 weeks. The primary endpoint of the study is the change from baseline in body mass index after 14 weeks 
of treatment, and patients may continue on therapy for up to 52 weeks. 
RM-718, a next generation MC4R peptide agonist   
Our MC4R peptide agonist for weekly administration, the new chemical entity, RM-718, has demonstrated the 
potential to reduce body weight and hunger, with favorable safety results observed in preclinical studies. RM-718 is 
designed to be more highly targeted and MC1R sparing with the potential to not cause hyperpigmentation. In a series of 
pre-clinical studies, RM-718 reduced overall body weight, body weight gain and food consumption in animal models. We 
initiated a Phase 1 in-human trial in the first quarter of 2024, including a multiple-ascending dose study in patients with 
hypothalamic obesity.  
RM-718 is an investigational, synthetic, cyclic heptamer (7-amino acid-containing) peptide, and is designed as a 
selective and potent MC4R agonist that spares other melanocortin receptors. The RM-718 formulation is a sustained 
release depot designed for once weekly (QW), subcutaneous (SC) injection, consisting of RM-718 and excipients. The 
major components are phospholipids (PL) that are a natural part of the cell membrane and, once injected into tissue and 
coming into contact with aqueous body fluids and tissues, can precipitate and trap a co-administered drug to form a drug-
PL co-precipitate (nanometer-sized phospholipid particles) that functions as a depot. Over time, this depot slowly diffuses 
into the surrounding tissue and/or is degraded by local phospholipase (slowly hydrolyzing phospholipids) resulting in a 
slow and controlled release of RM-718 over time. 
On March 25, 2024, we announced that the first participants had been dosed in our Phase 1 clinical trial of 
RM-718. This Phase 1 trial is a three-part study to evaluate safety, tolerability and PK. The study consists of Part A: single 
ascending doses (SAD) of RM-718 in healthy participants 18 to 55 years old with obesity; Part B: multiple ascending 
doses (MAD) of RM-718 in healthy participants 18 to 55 years old with obesity; and Part C: MAD of RM-718 in patients 

26 
12 to 65 years old with hypothalamic obesity. Cohorts in Parts A and B are double-blind, placebo-controlled, and 
randomized 2:1. Study participants will receive one weekly dose of either RM-718 or placebo in Part A, four weekly doses 
of either RM-718 or placebo in Part B, and 16 weekly doses of open-label RM-718 in Part C. In all Parts, RM-718 or 
placebo doses are administered weekly via subcutaneous injection.  
We completed a protocol amendment in December 2024 and we expect to begin enrolling patients with acquired 
hypothalamic obesity in Part C of the Phase 1 trial evaluating RM-718 in the first quarter of 2025. We plan to enroll up to 
30 patients with acquired hypothalamic obesity for 16 weeks in Part C of this Phase 1 trial, and patients may continue on 
therapy for up to 52 weeks. The anticipated total enrollment for all of Parts A, B and C of this study is up to 120 participants. 
Nonclinical studies of RM-718 in obese rats over 3 weeks of treatment demonstrated significant and stable 
reduction of body weight (-12.9 %) and body weight gain, reduced food, and water consumption (~ -25%) and 
improvement in insulin sensitivity without any pharmacological effects on the cardiovascular and respiratory systems. 
Studies in rodents (diet induced obese rats and mice including obese Zucker rats and Sprague Dawley rats) also 
demonstrated that RM-718 suppressed food intake and weight gain.  
Nonclinical toxicology studies of RM-718 administered for 28 days were conducted in rats and cynomolgus 
monkeys with doses up to 30 mg/kg. RM-718 was well tolerated in rats and monkeys, with no evidence of systemic 
toxicity. RM-718-related clinical observations of hyperpigmentation of skin on the muzzle in monkeys were rare (observed 
in only one monkey at the 30 mg/kg dose). Microscopic analysis showed minimal to moderate increased pigment of the 
epidermis of the skin of the muzzle at ≥10 mg/kg/doses, and we believe this result is probably species-specific and the 
result of MC1R stimulation. Chronic toxicology studies in non-human primates (NHP) and rats (39 and 26 weeks, 
respectively) have recently completed and we believe support long-term dosing in patients. 
In safety pharmacology studies evaluating potential adverse effects on the cardiovascular and respiratory systems 
in cynomolgus monkeys, RM-718 produced no treatment-related changes in effects on heart rate, blood pressure, 
electrocardiographic changes, or respiratory parameters up to the 30 mg/kg weekly dose. Moreover, the MC4R peptide 
agonist LY2112688 (formulated by Eli Lilly and Company), continuous SC infusion for 3 days of LY2112688 at 0.5 and 
1 mg/kg/day, resulted in a slight increase in blood pressure at the 1 mg/kg/day dose level, relative to the reference item 
(saline), with effects being more pronounced during the night cycle, with no definitive effect on heart rate. These changes 
were not noted following continuous administration of RM-718 at doses of 1 and 5 mg/kg/day for 3 days, with heart rate 
and blood pressure remaining comparable to the reference item (saline) up to 96 hours post start of infusion. A slight, non-
dose dependent decrease in body temperature was seen in all test article-treated groups over the course of the study, all 
within normal variation for monkeys and it was not considered adverse.  
Congenital Hyperinsulinism Program  
In February 2023, we completed the acquisition of Xinvento B.V., or Xinvento, a Dutch private limited liability 
company based in the Netherlands, through our wholly-owned subsidiary Rhythm Pharmaceuticals Netherlands B.V., a 
Dutch private limited liability company. Xinvento was founded in 2021 by Claudine van der Sande to identify and develop 
novel investigational therapeutic candidates designed to improve the care of patients and families living with CHI.  
Ms. Van der Sande joined Rhythm as a vice president and head of our CHI program following the acquisition.   
CHI is a rare disease that we believe is well aligned with our corporate strategy and broadens our focus into an 
adjacent endocrine indication with a high unmet need. CHI is the most frequent cause of severe, random and persistent 
hypoglycemia in newborns and children. Hypoglycemia results from an over-secretion of insulin, which causes blood 
sugar levels to fall dangerously low. Without proper and immediate treatment, patients with CHI may suffer seizures, 
coma, or even death and, longer term, children may experience developmental delays, epilepsy, cerebral palsy, and other 
neurological damage. Available treatments are suboptimal in terms of safety, tolerability and effectiveness. Patient and 
family surveys conducted by Congenital Hyperinsulinism International, a global patient advocacy organization, 
demonstrate that hypoglycemic (low blood sugar) levels are occurring one or more times per day in 48% of patients, and 
up to once a week in an additional 20% of patients, in each case, despite being on standard of care. In the United States, 
the estimated incidence rate for CHI is 1:29,000 to 1:31,000, according to the literature. With the acquisition, Rhythm 
acquired a suite of assets designed to treat patients with this disease. In our CHI Program, we are focused on identifying 

27 
and nominating a development candidate to advance into IND-enabling studies. We anticipate nominating a product 
candidate in 2025. 
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 to better understand rare MC4R pathway diseases. Our obesity 
DNA database contains sequencing data from approximately 100,000 individuals, as of December 31, 2024. Our 
sequencing data has come from four distinct sources in recent years: the Genetic Obesity ID | Genotyping Study, a global 
network of collaborations with obesity researchers with individual sample collections, institutional biobanks and 
Uncovering Rare Obesity (URO) or Rare Obesity Advanced Diagnosis (ROAD) programs. 
More than 90% of our DNA sequencing database is derived from the U.S. population. Therefore, our estimates 
of patient populations in Canada and Europe are more preliminary, but we believe the prevalence of these genetic diseases 
in Canada and Europe are similar to those in United States. 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. 
URO, our sponsored genetic testing program designed to increase access to genetic testing and help determine if 
individuals have an underlying genetic cause of their severe obesity, is the primary driver of how we collect sequencing 
samples and identify patients in the North America region. As obesity has reached epidemic levels in the United States, 
we are focused on identifying people with early-onset obesity that may be caused by certain rare genetic variants.  
This program complements several initiatives designed to advance the understanding of genetic causes of severe 
obesity, and URO 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 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. 
Our U.S. partner, Prevention Genetics, a subsidiary of Exact Sciences Corp., a Clinical Laboratory Improvement 
Amendments-College of American Pathologists of CLIA/CAP-certified independent laboratory, conducts the genetic 
testing for URO. 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. 
The ROAD program outside the United States mirrors the URO program as it is designed to increase awareness 
of rare MC4R pathway diseases caused by genetic variants and support patient identification in the International region. 
We collect samples from individuals with severe obesity from seven countries, including Spain, Italy, Ireland, Israel, 
Turkey and Germany. Our partner CGC Genetics Unilabs conducts the genetic testing for ROAD. This program covers 
the cost of the test, the kit and shipment. 
As of the end of 2024, we have collected samples from approximately 100,000 individuals with severe obesity, 
primarily through our URO and ROAD programs, which now are our primary source of sequencing samples. 
Commercial Efforts for IMCIVREE 
We are focused on developing our global commercial infrastructure to make IMCIVREE available in as many 
markets as possible. 
IMCIVREE, an MC4R agonist for which we hold worldwide rights, is the first-ever precision medicine developed 
for patients with certain rare MC4R-pathway diseases approved or authorized in the United States, the EU, the United 
Kingdom, Canada and other countries and regions. IMCIVREE is approved by the FDA to reduce excess body weight and 
maintain weight reduction long term in adult and pediatric patients aged 2 years and older with syndromic or monogenic 

28 
obesity due to BBS or POMC, PCSK1, or LEPR deficiency, as determined by an FDA-approved test demonstrating 
variants in POMC, PCSK1, or LEPR genes that are interpreted as pathogenic, likely pathogenic, or VUS. The EC and the 
MHRA have authorized IMCIVREE for the treatment of obesity and the control of hunger associated with genetically 
confirmed BBS or loss-of-function biallelic POMC, including PCSK1, deficiency or biallelic LEPR deficiency in adults 
and children 2 years of age and above.   
We have achieved market access for IMCIVREE for BBS or POMC and LEPR deficiencies, or both, in more 
than 15 countries outside the United States, and we continue to collaborate with authorities to achieve access in additional 
markets.  
While we are focused on commercial access for IMCIVREE for BBS and POMC and LEPR deficiencies, we are 
working with the broader community of patients and families, physicians, scientists and more to engage with them on the 
impact of hyperphagia and severe obesity caused by rare MC4R pathway diseases. Individually, populations with each of 
these MC4R pathway diseases are rare, and affected patients face many of the same challenges as any classically rare 
disease patient populations. There is little or no awareness about rare MC4R pathway diseases, 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 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. 
Competition 
The biotechnology and pharmaceutical industries are intensely competitive and subject to rapid and significant 
technological change. We have competitors with general obesity medications 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 weight management in patients with obesity due to 
BBS or POMC, PCSK1 or LEPR deficiencies, and there are no other approved treatments for addressing hyperphagia 
related behaviors of patients with rare MC4R pathway diseases. Metabolic and bariatric surgery may be less effective at 
achieving long-term weight loss in patients with MC4R pathway diseases given that hyperphagia increases risk of weight 
regain. Also, existing therapies indicated for general obesity and those in clinical development for the same, such as 
incretin therapies that target the receptors for the hormones glucagon-like peptide-1 (GLP-1) and glucose-stimulated 
insulinotropic polypeptide (GIP), do not specifically target or restore function impaired by genetic deficiencies and trauma 
to the hypothalamus that disrupt MC4R pathway signaling, which we believe is a root cause of hyperphagia and obesity 
in patients with these diseases. Studies such as the SURMOUNT 1 study, which served as the basis of the FDA approval 
of tirzepitide for obesity, specifically excluded patients with: “obesity induced by other endocrinologic disorders or 
monogenetic or syndromic forms of obesity.” In addition, several companies report having early-stage programs that are 
exploring MC4R agonisms. 
Licensing Agreements 
Ipsen Pharma S.A.S. 
Pursuant to our March 21, 2013 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 

29 
patents and 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 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 as of December 31, 2024, we have paid $4.0 million in clinical and regulatory 
milestones and $9.0 million in commercial 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 in collaboration 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 subcutaneous 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. As of December 31, 2024, we have made $2.3 million of milestone payments to Camurus. 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. 
RareStone Group Ltd. 
In December 2021, we entered into an Exclusive License Agreement with RareStone, or the RareStone License. 
Pursuant to the RareStone License, we granted to RareStone an exclusive, sublicensable, royalty-bearing license under 
certain patent rights and know-how to develop, manufacture, commercialize and otherwise exploit any pharmaceutical 
product that contains setmelanotide in the diagnosis, treatment or prevention of conditions and diseases in humans in 
China, including mainland China, Hong Kong and Macao. RareStone has a right of first negotiation in the event that 
Rhythm chooses to grant a license to develop or commercialize the licensed product in Taiwan. 

30 
According to the terms of the RareStone License, RareStone has agreed to seek local approvals to commercialize 
IMCIVREE for the treatment of obesity and hyperphagia due to POMC, PCSK1, or LEPR deficiency, as well as Bardet-
Biedl and Alström syndromes. Additionally, RareStone agreed to fund efforts to identify and enroll patients from China 
in Rhythm’s global EMANATE trial, a Phase 3, randomized, double-blind, placebo-controlled trial to evaluate 
setmelanotide in four independent sub-studies in patients with obesity due to a heterozygous variant of POMC/PCSK1 or 
LEPR; certain variants of the SRC1 gene, and certain variants of the SH2B1 gene. According to the terms of the RareStone 
License, RareStone made an upfront payment to Rhythm of $7.0 million and issued Rhythm 1,077,586 ordinary shares. 
Rhythm will be eligible to receive development and commercialization milestones of up to $62.5 million, as well as tiered 
royalty payments on annual net sales of IMCIVREE. 
On October 28, 2022, we delivered written notice, or the October 2022 Notice, to RareStone that we have 
terminated the RareStone License for cause.  In accordance with the October 2022 Notice, we maintain that RareStone has 
materially breached its obligations under the RareStone License to fund, perform or seek certain key clinical studies and 
waivers, including with respect to our global EMANATE trial, among other obligations. On December 21, 2022, 
RareStone provided written notice to us that it objects to the claims in the October 2022 Notice, including our termination 
of the RareStone License for cause. On March 16, 2023, we provided written notice, or the March 2023 Notice, to 
RareStone reaffirming our position that RareStone has materially breached its obligations under the RareStone License 
and that we have terminated the RareStone License for cause, and also requested documentation supporting RareStone’s 
purported dispute notice objecting to the claims in the October 2022 Notice.  On May 10, 2023, RareStone provided written 
notice to us reaffirming its objections to the claims in our October 2022 Notice and March 2023 Notice, including to our 
termination of the RareStone License for cause.  On November 29, 2023, RareStone wrote to us seeking to negotiate and 
execute a commercial supply agreement as contemplated under the Exclusive License Agreement, and on January 19, 
2024, we responded in writing again reaffirming our position that RareStone has materially breached its obligations under 
the RareStone License and that we have terminated the RareStone License for cause.  Since our last written response in 
January 2024, we have engaged in discussions with RareStone in an effort to reach a resolution, however, we cannot 
predict whether a resolution will ever be reached. 
 
LG Chem  
In January 2024, we entered into a license agreement and share issuance agreement with LG Chem, Ltd, or LGC. 
Under the terms of the license agreement, we obtained worldwide rights to exploit LGC’s proprietary compound 
bivamelagon  and have assumed sponsorship of two ongoing LGC Phase 2 studies designed to evaluate safety, tolerability, 
pharmacokinetics and weight loss efficacy of bivamelagon. The SIGNAL trial is a randomized, placebo-controlled, 
double-blind study designed to enroll and evaluate approximately 28 patients with acquired hypothalamic obesity. 
Participants will receive one of three doses of bivamelagon by oral administration once daily for up to 52 weeks, and the 
primary endpoint of the study is the change from baseline in body mass index after 14 weeks of treatment. The open-label, 
single-arm, 16-week ROUTE trial is designed to enroll five patients with POMC or LEPR deficiency obesity.  
 
We paid LGC $40.0 million in cash and issued shares of our common stock with an aggregate value of 
$20.0 million. The shares were issued at a per share price equal to the ten-day volume weighted-average closing price for 
our common stock, calculated as of the trading day immediately prior to January 4, 2024. We also agreed to make a 
$40.0 million payment in cash 18 months after the effective date of the license agreement.  
 
In addition and subject to, among other conditions, the completion of Phase 2 development of bivamelagon, we 
have agreed to pay LGC royalties of between low-to-mid single digit percent of net revenues from products covered by 
our patent portfolio directed toward the MC4R agonists, including setmelanotide, RM-718, and bivamelagon (collectively, 
our “MC4R portfolio”), including bivamelagon, commencing in 2029 and also dependent upon achievement of various 
regulatory and indication approvals, and subject to customary deductions and anti-stacking provisions. Royalties may 
further increase to a low, double-digit percent royalty, though such royalty would only be applicable on net sales of 
bivamelagon in a region if bivamelagon is covered by a composition of matter or method of use patent controlled by LGC 
in 
such 
region 
and 
our 
MC4R 
portfolio 
is 
not 
covered 
by 
any 
composition 
of 
matter 
or  

31 
method of use patents controlled by us in such region. Such increased rate would only apply on net sales of bivamelagon 
for the limited remainder of the royalty term in the relevant region. 
 
Patents and Proprietary Rights 
Our MC4R portfolio of licensed and exclusively owned patent families, which includes setmelanotide, RM-718, 
and bivamelagon, consists of 45 patent families currently being prosecuted or maintained, which include applications and 
patents directed to compositions of matter, formulations, and methods of making, and methods of treatment. These patent 
families have been filed in over 40 jurisdictions, including all major markets such as the United States, Europe, Australia, 
Brazil, Canada, China, India, Israel, Japan,  Korea, Mexico, New Zealand, Russia, and Singapore. In the key patent families 
directed to selected peptide-based MC4R receptor agonists, including the composition of matter for setmelanotide, we 
have 10 issued United States patents and over 225 issued non-United States patents in various jurisdictions. Patents issuing 
in these patent families will have a standard 20-year term and expire between 2026 and 2045, in each instance provided 
that all appropriate maintenance fees are paid and not including any patent term adjustment, patent term extension, or 
supplementary protection certificates that may be available on a country-by-country basis. For example, in a key patent 
family providing composition of matter coverage for setmelanotide, we have received 5 years of patent term extension in 
the United States, extending patent protection in that patent family through 2032.  
In addition to the patents and patent applications discussed above, we co-own one patent family with the 
University of Strasbourg and the French National Institute of Health and Medical Research, which is directed to specific 
uses of MC4R agonists. We also own three patent families directed to small molecule compounds for use in our CHI 
program, with patent claims that will expire when issued between 2043 and 2045, without factoring in any available patent 
term extension. 
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 
maintenance of trade secrets and careful protection of our proprietary information. Our license from Ipsen for the 
melanocortin program requires 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. 

32 
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. IMCIVREE has received FDA approval and we have been awarded 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 
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. 
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 assurances 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 confidentiality agreements further 
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, 
Braine 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.  We have also entered into commercial supply agreements with both Polypeptide 
and Recipharm. Under our agreements, we pay these third parties for services and/or manufacture of setmelanotide in 

33 
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 the future. In 
connection with our commercialization of setmelanotide or any future product candidate, we have engaged and could need 
to engage other third parties to assist in manufacturing and/or supply chain related aspects. While there are a limited 
number of companies that can produce raw materials and API in the quantities and with the quality and purity that we 
require for our product, based on our diligence to date, we believe our current network of manufacturing partners are able 
to fulfill these requirements, and are capable of continuing to expand capacity as needed. Additionally, we have, and will 
continue to evaluate further relationships with additional suppliers to increase overall capacity as well as further reduce 
risks associated with reliance on a limited number of suppliers for manufacturing. 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 additional capacity or seek alternate suppliers. We believe that our current suppliers and CMOs are 
able to scale production to meet our clinical and commercial demands. Because we rely on these CMOs, we have personnel 
with pharmaceutical development and manufacturing experience who are responsible for maintaining our CMO 
relationships. 
Setmelanotide is distributed in the United States through our specialty pharmacy and in the EU/UK through third-
party service providers that deliver the medication to patients. We plan to continue building out our network for 
commercial distribution in jurisdictions in which setmelanotide is approved. 
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 New Drug Application, or NDA, process or by comparable 
foreign regulatory authorities through similar applications before it may be legally marketed in the United States and in 
foreign jurisdictions. 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 

34 
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, certain of which must be 
conducted in accordance with FDA’s Good Laboratory Practice requirements and other applicable 
regulations; 
• 
submission to the FDA of an 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 potential inspection 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 allowance 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 
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 allowance 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 among other things, 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. While the IND is active, 
progress reports summarizing the results of the clinical trials and nonclinical studies performed since the last progress 
report, among other information, 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 
 

35 
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. 
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 
selected and tested, and stability studies must be conducted to demonstrate that the product candidate does not undergo 
unacceptable deterioration over its shelf life. 
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, including results from 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 
 

36 
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 an NDA, the FDA will typically inspect one or more clinical sites to assure compliance 
with GCPs. 
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 

37 
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 
application may be eligible for priority review. An NDA for a Fast Track product candidate 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 
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. An NDA is eligible for priority review 
if the product candidate 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, depending on the design of the applicable clinical trials, 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 confirmatory clinical studies to verify 
and describe the anticipated effect on irreversible morbidity or mortality or other clinical benefit, and may require that 
such confirmatory studies be underway prior to granting any accelerated approval. Products receiving accelerated approval 
may be subject to expedited withdrawal procedures if the sponsor fails to conduct the required confirmatory studies in a 
timely manner 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. 

38 
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 may 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. 
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 

39 
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; 
• 
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 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 
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 data 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 non-patent 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, including, for example, new indications or 

40 
dosages , 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. 
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 existing periods of regulatory exclusivity if a 
sponsor conducts clinical trials in children in response to a written request from the FDA. The issuance of a written request 
from the FDA 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.  
After an in vitro device is authorized by the FDA and 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 currently covers the methods and documentation of the design, testing, production, processes, controls, 
quality assurance, labeling, packaging and shipping of medical devices. Manufacturing sites for devices also remain 
subject to periodic unscheduled inspections by the FDA. 
Regulation of Combination Products in the United States 
Certain products 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 

41 
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. 
Foreign Regulation 
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. 
Regulation and Procedures Governing Marketing Authorization of Medicinal Products in the European Union 
Non-clinical studies and clinical trials 
Similarly to the United States, the various phases of non-clinical and clinical research in the EU are subject to 
significant regulatory controls. 
Non-clinical studies are performed to demonstrate the health or environmental safety of new biological 
substances. Non-clinical (pharmaco-toxicological) studies must be conducted in compliance with the principles of good 
laboratory practice (GLP) as set forth in EU Directive 2004/10/EC (unless otherwise justified for certain particular 
medicinal products, e.g., radio-pharmaceutical precursors for radio-labeling purposes) . In particular, non-clinical studies, 
both in vitro and in vivo, must be planned, performed, monitored, recorded, reported and archived in accordance with the 
GLP principles, which define a set of rules and criteria for a quality system for the organizational process and the conditions 
for non-clinical studies. These GLP standards reflect the Organization for Economic Co-operation and Development 
requirements. 
Clinical trials of medicinal products in the EU must be conducted in accordance with EU and national regulations 
and the International Council for Harmonization of Technical Requirements for Pharmaceuticals for Human Use (ICH) 
guidelines on good clinical practices (GCP) as well as the applicable regulatory requirements and the ethical principles 
that have their origin in the Declaration of Helsinki. If the sponsor of the clinical trial is not established within the EU, it 
must appoint an EU entity to act as its legal representative. The sponsor must take out a clinical trial insurance policy, and 
in most EU member states, the sponsor is liable to provide ‘no fault’ compensation to any study subject injured in the 
clinical trial. 
The regulatory landscape related to clinical trials in the EU has been subject to recent changes. The EU Clinical 
Trials Regulation (CTR), which was adopted in April 2014 and repeals the EU Clinical Trials Directive, became applicable 
on January 31, 2022. Unlike directives, the CTR is directly applicable in all EU member states without the need for member 
states to further implement it into national law. The CTR notably harmonizes the assessment and supervision processes 
for clinical trials throughout the EU via a Clinical Trials Information System, which contains a centralized EU portal and 
database. 
While the EU Clinical Trials Directive required a separate clinical trial application (CTA) to be submitted in each 
member state in which the clinical trial takes place, to both the competent national health authority and an independent 

42 
ethics committee, much like the FDA and IRB respectively, the CTR introduces a centralized process and only requires 
the submission of a single application for multi-center trials. The CTR allows sponsors to make a single submission to 
both the competent authority and an ethics committee in each member state, leading to a single decision per member state. 
The CTA must include, among other things, a copy of the trial protocol and an investigational medicinal product dossier 
containing information about the manufacture and quality of the medicinal product under investigation. The assessment 
procedure of the CTA has been harmonized as well, including a joint assessment by all member states concerned, and a 
separate assessment by each member state with respect to specific requirements related to its own territory, including 
ethics rules. Each member state’s decision is communicated to the sponsor via the centralized EU portal. Once the CTA is 
approved, clinical study development may proceed. 
The CTR transition period ended on January 31, 2025, and all clinical trials (and related applications) are now 
fully subject to the provisions of the CTR.   
Medicines used in clinical trials must be manufactured in accordance with Good Manufacturing Practice (GMP). 
Other national and EU-wide regulatory requirements may also apply. 
Marketing Authorizations 
In the EU, medicinal product candidates can only be commercialized after obtaining a marketing authorization, 
(MA). To obtain regulatory approval of a product candidate in the EU, we must submit an MA application, (MAA). The 
process for doing this depends, among other things, on the nature of the medicinal product. 
There are two types of MAs: 
• 
“Centralized MAs” are issued by the European Commission (EC) through the centralized procedure, based 
on the opinion of the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines 
Agency (EMA) and are valid throughout the EU. The centralized procedure is mandatory for certain types 
of products, such as (i) medicinal products derived from biotechnological processes, (ii) designated orphan 
medicinal products, (iii) advanced therapy medicinal products (ATMPs) such as gene therapy, somatic cell-
therapy or tissue-engineered medicines, and (iv) medicinal products containing a new active substance 
indicated for the treatment certain diseases, such as HIV/AIDS, cancer, neurodegenerative diseases, diabetes, 
auto-immune and other immune dysfunctions and viral diseases. The centralized procedure is optional for 
any products containing a new active substance not yet authorized in the EU, or for products that constitute 
a significant therapeutic, scientific or technical innovation or for which the granting of a MA would be in the 
interest of public health in the EU. 
• 
“National MAs” are issued by the competent authorities of the EU member states, only cover their respective 
territory, and are available for product candidates not falling within the mandatory scope of the centralized 
procedure. Where a product has already been authorized for marketing in an EU member state, this national 
MA can be recognized in another member state through the mutual recognition procedure. If the product has 
not received a national MA in any member state at the time of application, it can be approved simultaneously 
in various member states through the decentralized procedure. Under the decentralized procedure an identical 
dossier is submitted to the competent authorities of each of the member states in which the MA is sought, 
one of which is selected by the applicant as the reference member state. 
A MA has an initial validity for five years in principle. The MA 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 MA 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 MA was granted, at least six months before the 
MA 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 MA. Once subsequently 
definitively renewed, the MA shall be valid for an unlimited period. Any authorization which is not followed by the actual 
placing of the medicinal product on the EU market or on the market of the authorizing EU member state(s) within three 
years after authorization ceases to be valid (the so-called “sunset clause”). 

43 
Under the centralized procedure, 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. In exceptional cases, the CHMP might perform an accelerated review of 
a MAA in no more than 150 days (not including clock stops). Innovative products that target an unmet medical need and 
are expected to be of major public health interest may be eligible for a number of expedited development and review 
programs, such as the PRIME scheme, which provides incentives similar to the breakthrough therapy designation in the 
United States. In March 2016, the EMA launched an initiative, the Priority Medicines (PRIME) scheme, a voluntary 
scheme aimed at enhancing the EMA’s support for the development of medicines that target unmet medical needs. It is 
based on increased interaction and early dialogue with companies developing promising medicines, to optimize their 
product development plans and speed up their evaluation to help them reach patients earlier. Product developers that 
benefit from PRIME designation can expect to be eligible for accelerated assessment but this is not guaranteed. Many 
benefits accrue to sponsors of product candidates with PRIME designation, including but not limited to, early and proactive 
regulatory dialogue with the EMA, frequent discussions on clinical trial designs and other development program elements, 
and accelerated MAA assessment once a dossier has been submitted. Importantly, a dedicated contact and rapporteur from 
the CHMP is appointed early in the PRIME scheme facilitating increased understanding of the product at EMA’s 
committee level. An initial meeting initiates these relationships and includes a team of multidisciplinary experts at the 
EMA to provide guidance on the overall development and regulatory strategies. 
Moreover, in the EU, a “conditional” MA may be granted in cases where all the required safety and efficacy data 
are not yet available. The conditional MA is subject to conditions to be fulfilled for generating the missing data or ensuring 
increased safety measures. It is valid for one year and has to be renewed annually until fulfillment of all the conditions. 
Once the pending studies are provided, it can become a “standard” MA. However, if the conditions are not fulfilled within 
the timeframe set by the EMA, the MA ceases to be renewed. Furthermore, MA may also be granted “under exceptional 
circumstances” when the applicant can show that it is unable to provide comprehensive data on the efficacy and safety 
under normal conditions of use even after the product has been authorized and subject to specific procedures being 
introduced. This may arise in particular when the intended indications are very rare and, in the present state of scientific 
knowledge, it is not possible to provide comprehensive information, or when generating data may be contrary to generally 
accepted ethical principles. This MA is close to the conditional MA as it is reserved for medicinal products to be approved 
for severe diseases or unmet medical needs and the applicant does not hold the complete data set legally required for the 
grant of a MA. However, unlike the conditional MA, the applicant does not have to provide the missing data and will never 
have to. Although the MA “under exceptional circumstances” is granted definitively, the risk-benefit balance of the 
medicinal product is reviewed annually and the MA is withdrawn in case the risk-benefit ratio is no longer favorable. 
Data and marketing exclusivity 
The EU also provides opportunities for market exclusivity. Upon receiving MA, reference product candidates 
generally receive eight years of data exclusivity and an additional two years of market exclusivity. If granted, the data 
exclusivity period prevents applicants generic or biosimilar applicants from relying on the pre-clinical and clinical trial 
data contained in the dossier of the reference product when applying for a generic or biosimilar MA in the EU during a 
period of eight years from the date on which the reference product was first authorized in the EU. During the market 
exclusivity period, an application for a generic or biosimilar MA can be submitted and a related MA may be granted, and 
the innovator’s data may be referenced, but no generic or biosimilar can be placed on the EU market until 10 years have 
elapsed from the initial MA of the reference product in the EU. The overall ten-year period can be extended to a maximum 
of eleven years if, during the first eight years of those ten years, the MA 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. However, there is no guarantee that a product will be 
considered by the EU’s regulatory authorities to be a new chemical entity, and products may not qualify for data 
exclusivity. 
Orphan Medicinal Products 
The criteria for designating an “orphan medicinal product” in the EU are similar in principle to those in the United 
States. Regulation (EC) No. 141/2000, as implemented by Regulation (EC) No. 847/2000 provides that a medicinal 
product can be designated as an orphan if its sponsor can establish that: (1) the product is intended for the diagnosis, 
prevention or  

44 
 treatment of a life threatening or chronically debilitating condition; (2) either (a) such condition affects not more than five 
in ten thousand persons in the EU when the application is made, or (b) the product, without the benefits derived from the 
orphan status, would not generate sufficient return in the EU to justify the necessary investment; and (3) there exists no 
satisfactory method of diagnosis, prevention or treatment of the condition in question that has been authorized in the EU 
or, if such method exists, the medicinal product will be of significant benefit to those affected by that condition. 
In the EU, an application for designation as an orphan product can be made any time prior to the filing of the 
application for MA. Orphan designation entitles a party to incentives such fee reductions or fee waivers, protocol 
assistance, and access to the centralized procedure. Once authorized, orphan medicinal products are entitled to a ten-years 
period of market exclusivity for the approved therapeutic indication, which means that the competent authorities cannot 
accept another MAA, or grant a MA, or accept an application to extend a MA for a similar product for the same indication 
for a period of ten years. The period of market exclusivity is extended by two years for orphan medicinal products that 
have also complied with an agreed pediatric investigation plan (PIP). No extension to any supplementary protection 
certificate can be granted on the basis of pediatric studies for orphan indications. Orphan designation does not convey any 
advantage in, or shorten the duration of, the regulatory review and approval process. 
The orphan exclusivity period may, however, be reduced to six years if, at the end of the fifth year, it is established 
that the product no longer meets the criteria for which it received orphan destination, including where it is shown that the 
product is sufficiently profitable not to justify maintenance of market exclusivity, or where the prevalence of the condition 
has increased above the threshold. Granting of an authorization for another similar orphan medicinal product where another 
product has market exclusivity can happen at any time if: (i) the second applicant can establish that its product, although 
similar to the authorized product, is safer, more effective or otherwise clinically superior, (ii) inability of the applicant to 
supply sufficient quantities of the orphan medicinal product or (iii) where the applicant consents to a second orphan 
medicinal product application. A company may voluntarily remove a product from the orphan register. 
Pediatric Development 
In the EU, MAAs for new medicinal products have to include the results of trials conducted in the pediatric 
population, in compliance with a PIP agreed with the EMA’s Pediatric Committee (PDCO). The PIP sets out the timing 
and measures proposed to generate data to support a pediatric indication of the drug for which an MA is being sought. The 
PDCO can grant a deferral of the obligation to implement some or all of the measures of the PIP until there are sufficient 
data to demonstrate the efficacy and safety of the product in adults. Further, the obligation to provide pediatric clinical 
trial data can be waived by the PDCO when these data are not needed or appropriate because the product is likely to be 
ineffective or unsafe in children, the disease or condition for which the product is intended occurs only in adult populations, 
or when the product does not represent a significant therapeutic benefit over existing treatments for pediatric patients. 
Once the MA is obtained in all member states and study results are included in the product information, even when 
negative, the product is eligible for a six-months supplementary protection certificate extension (if any is in effect at the 
time of approval) or, in the case of orphan pharmaceutical products, a two year extension of the orphan market exclusivity 
is granted. 
Post-Approval Requirements 
Similar to the United States, both MA holders and manufacturers of medicinal products are subject to 
comprehensive regulatory oversight by the EMA, the EC and/or the competent regulatory authorities of the member states. 
The holder of a MA must establish and maintain a pharmacovigilance system and appoint an individual qualified person 
for pharmacovigilance (QPPV) who is responsible for the establishment and maintenance of that system, and oversees the 
safety profiles of medicinal products and any emerging safety concerns. Key obligations include expedited reporting of 
suspected serious adverse reactions and submission of periodic safety update reports (PSURs). 
All new MAA must include a risk management plan (RMP) describing the risk management system that the 
company will put in place and documenting measures to prevent or minimize the risks associated with the product. The 
regulatory authorities may also impose specific obligations as a condition of the MA. Such risk-minimization measures or 
post-authorization obligations may include additional safety monitoring, more frequent submission of PSURs, or the 
conduct of additional clinical trials or post-authorization safety studies. 

45 
The advertising and promotion of medicinal products is also subject to laws concerning promotion of medicinal 
products, interactions with physicians, misleading and comparative advertising and unfair commercial practices. All 
advertising and promotional activities for the product must be consistent with the approved summary of product 
characteristics, and therefore all off-label promotion is prohibited. Direct-to-consumer advertising of prescription 
medicines is also prohibited in the EU. Although general requirements for advertising and promotion of medicinal products 
are established under EU directives, the details are governed by regulations in each member state and can differ from one 
country to another. 
The aforementioned EU rules are generally applicable in the European Economic Area (EEA) which consists of 
the 27 EU member states plus Norway, Liechtenstein and Iceland. 
Failure to comply with EU and member state laws that apply to the conduct of clinical trials, manufacturing 
approval, MA of medicinal products and marketing of such products, both before and after grant of the MA, manufacturing 
of pharmaceutical products, statutory health insurance, bribery and anti-corruption or with other applicable regulatory 
requirements may result in administrative, civil or criminal penalties. These penalties could include delays or refusal to 
authorize the conduct of clinical trials, or to grant MA, product withdrawals and recalls, product seizures, suspension, 
withdrawal or variation of the MA, total or partial suspension of production, distribution, manufacturing or clinical trials, 
operating restrictions, injunctions, suspension of licenses, fines and criminal penalties.  
Regulation of Combination Products in the European Union 
The EU regulates medical devices and medicinal products separately, through different legislative instruments, 
and the applicable requirements will vary depending on the type of drug-device combination product. EU guidance has 
been published to help manufacturers select the right regulatory framework.  
Drug-delivery products intended to administer a medicinal product where the medicinal product and the device 
form a single integral product are regulated as medicinal products in the EU. The EMA is responsible for evaluating the 
quality, safety and efficacy of MAAs submitted through the centralized procedure, including the safety and performance 
of the medical device in relation to its use with the medicinal product. The EMA or the EU member state national 
competent authority will assess the product in accordance with the rules for medicinal products described above but the 
device part must comply with the EU Medical Devices Regulation (including the general safety and performance 
requirements provided in Annex I). MAA must include – where available – the results of the assessment of the conformity 
of the device part with the EU Medical Devices Regulation contained in the manufacturer’s EU declaration of conformity 
of the device or the relevant certificate issued by a notified body. If the MAA does not include the results of the conformity 
assessment and where for the conformity assessment of the device, if used separately, the involvement of a notified body 
is required, the competent authority must require the applicant to provide a notified body opinion on the conformity of the 
device.  
By contrast, in case of drug-delivery products intended to administer a medicinal product where the device and 
the medicinal product do not form a single integral product (but are e.g. co-packaged), the medicinal product is regulated 
in accordance with the rules for medicinal products described above while the device part is regulated as a medical device 
and will have to comply with all the requirements set forth by the EU Medical Devices Regulation. The characteristics of 
non-integral devices used for the administration of medicinal products may impact the quality, safety and efficacy profile 
of the medicinal products. To the extent that administration devices are co-packaged with the medicinal product or, in 
exceptional cases, where the use of a specific type of administration device is specifically provided for in the product 
information of the medicinal product, additional information may need to be provided in the MAA for the medicinal 
product on the characteristics of the medical device(s) that may impact on the quality, safety and/or efficacy of the 
medicinal product.  
The requirements regarding quality documentation for medicinal products when used with a medical device, 
including single integral products, co-packaged and referenced products, are outlined in the EMA guideline of July 22, 
2021, which became effective on January 1, 2022.  
The aforementioned EU rules are generally applicable in the EEA. 

46 
Regulation of Companion Diagnostics in the European Union 
In the EU, in vitro diagnostic medical devices were regulated by Directive 98/79/EC (IVDD) which regulated the 
placing on the market, the CE marking, the essential requirements, the conformity assessment procedures, the registration 
obligations for manufactures and devices as well as the vigilance procedure. In vitro diagnostic medical devices had to 
comply with the requirements provided for in the Directive, and with further requirements implemented at national level 
(as the case may be). 
The regulation of companion diagnostics is subject to further requirements since the in vitro diagnostic medical 
devices Regulation No 2017/746 (IVDR) became applicable on May 26, 2022. Following subsequent legislative changes, 
European institutions adopted a “progressive” roll-out of the IVDR to prevent disruption in the supply of in vitro diagnostic 
medical devices. The IVDR fully applies since May 26, 2022 but there is a tiered system extending the grace period for 
many devices (depending on their risk classification) before they have to be fully compliant with the IVDR. 
The IVDR introduces a new classification system for companion diagnostics which are now specifically defined 
as diagnostic tests that support the safe and effective use of a specific medicinal product, by identifying patients that are 
suitable or unsuitable for treatment. Companion diagnostics will have to undergo a conformity assessment by a notified 
body. Before it can issue an EU certificate, the notified body must seek a scientific opinion from the EMA on the suitability 
of the companion diagnostic to the medicinal product concerned if the medicinal product falls exclusively within the scope 
of the centralized procedure for the authorization of medicines, or the medicinal product is already authorized through the 
centralized procedure, or a MAA for the medicinal product has been submitted through the centralized procedure. For 
other substances, the notified body can seek the opinion from a national competent authority or the EMA. 
The aforementioned EU rules are generally applicable in the EEA. 
Brexit and the Regulatory Framework in the United Kingdom 
The United Kingdom (UK) left the EU on January 31, 2020, following which existing EU medicinal product 
legislation continued to apply in the UK during the transition period under the terms of the EU-UK Withdrawal Agreement. 
The transition period, which ended on December 31, 2020, maintained access to the EU single market and to the global 
trade deals negotiated by the EU on behalf of its members. The transition period provided time for the UK and EU to 
negotiate a framework for partnership for the future, which was then crystallized in the Trade and Cooperation Agreement 
(TCA) and became effective on the January 1, 2021. The TCA includes specific provisions concerning pharmaceuticals, 
which include the mutual recognition of GMP inspections of manufacturing facilities for medicinal products and GMP 
documents issued, but does not foresee wholesale mutual recognition of UK and EU pharmaceutical regulations. 
EU laws which have been transposed into UK law through secondary legislation continue to be applicable as 
“retained EU law”, however new EU legislation such as the EU CTR or in relation to orphan medicines is not be applicable. 
The UK government has passed the Medicines and Medical Devices Act 2021, which introduces delegated powers in favor 
of the Secretary of State or an ‘appropriate authority’ to amend or supplement existing regulations in the area of medicinal 
products and medical devices. This allows new rules to be introduced in the future by way of secondary legislation, which 
aims to allow flexibility in addressing regulatory gaps and future changes in the fields of human medicines, clinical trials 
and medical devices. 
As of January 1, 2021, the Medicines and Healthcare products Regulatory Agency (MHRA) is the UK’s 
standalone medicines and medical devices regulator. As a result of the Northern Ireland protocol, different rules will apply 
in Northern Ireland than in England, Wales, and Scotland, together, Great Britain (GB); broadly, Northern Ireland will 
continue to follow the EU regulatory regime, but its national competent authority will remain the MHRA. On February 27, 
2023, the UK Government and the European Commission reached a political agreement on the “Windsor Framework” 
which will revise the Protocol on Ireland/Northern Ireland in order to address some of the perceived shortcomings in its 
operation. Under the changes, Northern Ireland will be reintegrated under the regulatory authority of the MHRA with 
respect to medicinal products. The Windsor Framework was approved by the EU-UK Joint Committee on March 24, 2023, 
so the UK government and the EU will enact legislative measures to bring it into law. On June 9, 2023, the MHRA 
announced that the medicines aspects of the Windsor Framework will apply from January 1, 2025. 

47 
The MHRA has introduced changes to national licensing procedures, including procedures to prioritize access to 
new medicines that will benefit patients, including a 150-day assessment and a rolling review procedure. All existing EU 
MAs for centrally authorized products were automatically converted or grandfathered into UK MAs, effective in GB 
(only), free of charge on January 1, 2021, unless the MA holder chooses to opt-out. After Brexit, companies established 
in the UK cannot use the centralized procedure and instead must follow one of the UK national authorization procedures 
or one of the remaining post-Brexit international cooperation procedures to obtain an MA to commercialize products in 
the UK. A new international recognition framework has been in place from January 1, 2024, whereby the MHRA will 
have regard to decisions on the approval of MAs made by the EMA and certain other regulators when determining an 
application for a new GB MA. 
There will be no pre-MA orphan designation. Instead, the MHRA will review applications for orphan designation 
in parallel to the corresponding MA application. The criteria are essentially the same, but have been tailored for the market, 
i.e., the prevalence of the condition in GB, rather than the EU, must not be more than five in 10,000. Should an orphan 
designation be granted, the period or market exclusivity will be set from the date of first approval of the product in GB. 
Additionally, on June 26, 2022, the MHRA published its response to a 10-week consultation on the post-Brexit 
regulatory framework for medical devices and diagnostics. In this response the MHRA confirmed that it would bring 
forward legislative changes to the UK Medical Devices Regulations 2002 (which are based on EU legislation, primarily 
the EU Medical Devices Directive and the (EU) IVDD), in particular to create new access pathways to support innovation, 
create an innovative framework for regulating software and artificial intelligence as medical devices, reform in vitro 
diagnostic medical devices regulation, and foster sustainability through the reuse and remanufacture of medical devices. 
Regulations implementing the new regime were originally scheduled to come into force in July 2023, but have recently 
been postponed to July 2025. Devices bearing CE marks issued by EU notified bodies under the EU Medical Devices 
Regulation or EU Medical Devices Directive are now subject to transitional arrangements. The UK Government has 
introduced legislation that provides that CE-marked medical devices may be placed on the GB market on the following 
timelines: 
• 
general medical devices compliant with the EU Medical Devices Directive or EU Active Implantable 
Medical Devices Directive with a valid declaration and CE marking can be placed on the GB market up until 
the sooner of expiry of the certificate or June 30, 2028; and 
• 
general medical devices, including custom-made devices, compliant with the EU Medical Devices 
Regulation can be placed on the GB market up until June 30, 2030. 
Following these transitional periods, it is expected that all medical devices will require a UK Conformity Assessed 
(UKCA) mark. Manufacturers may choose to use the UKCA mark on a voluntary basis until June 30, 2023. However, 
UKCA marking will not be recognized in the EU. The rules for placing medical devices on the market in Northern Ireland, 
which is part of the UK, differ from those in the rest of the UK. Compliance with this legislation is a prerequisite to be 
able to affix the UKCA mark to our products, without which they cannot be sold or marketed in GB. 
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 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 

48 
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.  We 
are also enrolled in the Medicaid Drug Rebate Program and other governmental pricing programs, and have price reporting 
and payment obligations under these programs. 
In the EU, pricing and reimbursement schemes vary widely from one member state to another. Some member 
states 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 (HTA), in order to obtain 
reimbursement or pricing approval. For example, the EU provides options for its member states to restrict the range of 
products for which their national health insurance systems provide reimbursement and to control the prices of medicinal 
products for human use. 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 
prescription only medicinal products, has become more intense. As a result, increasingly high barriers are being erected to 
the entry of new products. 
HTA of medicinal products is, however, becoming an increasingly common part of the pricing and reimbursement 
procedures in some EU member states, including 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 

49 
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. 
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 
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 non-physician practitioners (physician assistants, nurse practitioners, clinical nurse specialists, certified registered 
nurse anesthetists, anesthesiology assistants, and certified nurse midwives) 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. 

50 
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 national laws (including anti-bribery laws) of the EU member 
states. In the UK, the UK Bribery Act 2010 applies to any company incorporated in or “carrying on business”, 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/or 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 legislation and national laws on medicinal products including on the promotion of 
medicinal products, interactions with physicians, misleading and comparative advertising and unfair commercial practices, 
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 Laws 
Numerous state, federal and foreign laws, regulations and standards govern the collection, use, access to, 
confidentiality and security of health-related and other personal information, and could apply now or in the future to our 
operations or the operations of our partners. In the United States, numerous federal and state laws and regulations, 
including data breach notification laws, health information privacy and security laws and consumer protection laws and 
regulations govern the collection, use, disclosure, and protection of health-related and other personal information. In 
addition, certain foreign laws govern the privacy and security of personal data, including health-related data. Privacy and 
security laws, regulations, and other obligations are constantly evolving, may conflict with each other to complicate 
compliance efforts, and can result in investigations, proceedings, or actions that lead to significant civil and/or criminal 
penalties and restrictions on data processing. 
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. 

51 
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; 
• 
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; 
• 
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,” such as IMCIVREE, 
from the 340B ceiling price requirements for these covered entities; 
• 
a 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. On June 17, 2021, the U.S. Supreme Court dismissed the most recent judicial challenge to the ACA brought by 
several states without specifically ruling on the constitutionality of the ACA. Thus, the ACA will remain in effect in its 
current form.  
In addition, 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, which went 
into effect on April 1, 2013 and will remain in effect through 2032, 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. On March 11, 2021, the American Rescue Plan 
Act of 2021 was signed into law, which eliminated the statutory Medicaid drug rebate cap, beginning January 1, 2024. 
The rebate was previously capped at 100% of a drug’s AMP. 
Most significantly, in August 2022, President Biden signed the Inflation Reduction Act of 2022 (IRA) into law.  
This statute marks the most significant action by Congress with respect to the pharmaceutical industry since adoption of 
the ACA in 2010.  Among other things, the IRA requires manufacturers of certain drugs to engage in price negotiations 
with Medicare, with prices that can be negotiated subject to a cap; imposes rebates under Medicare Part B and Medicare 
Part D to penalize price increases that outpace inflation (first due in 2023); redesigns the Medicare Part D benefit 
(beginning in 2024);  and replaces the Part D coverage gap discount program with a new manufacturer discount program 
(beginning in 2025).  CMS has published the negotiated prices for the initial ten drugs, which will first be effective in 
2026, and has published the list of the subsequent 15 drugs that will be subject to negotiation.  The IRA permits the 

52 
Secretary of the Department of Health and Human Services (HHS) to implement many of these provisions through 
guidance, as opposed to regulation, for the initial years. HHS has and will continue to issue and update guidance as these 
programs are implemented, although the Medicare drug price negotiation program is currently subject to legal challenges.  
While the impact of the IRA on the pharmaceutical industry cannot yet be fully determined, it is likely to be significant.    
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, drug price increase 
disclosure and other transparency measures. Some states have enacted legislation creating so-called prescription drug 
affordability boards, which ultimately may attempt to impose price limits on certain drugs in these states. 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 IMCIVREETM and our product candidates, if 
approved. 
In the EU, on December 15, 2021, Regulation No 2021/2282 on HTA, amending Directive 2011/24/EU, was 
adopted. The Regulation entered into force in January 2022 and has been applicable since January 2025, with phased 
implementation based on the type of product, i.e. oncology and advanced therapy medicinal products as of 2025, orphan 
medicinal products as of 2028, and all other medicinal products by 2030. The Regulation intends to boost cooperation 
among EU member states in assessing health technologies, including new medicinal products, and provide the basis for 
cooperation at the EU level for joint clinical assessments in these areas. It will permit EU member states to use common 
HTA tools, methodologies, and procedures across the EU, working together in four main areas, including joint clinical 
assessment of the innovative health technologies with the highest 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. 
Human Capital 
We are expanding the reach of Rhythm across many fronts - the number of addressable patients, indications, 
geographies, pipeline assets and employees – and we fully recognize that having the talent, experience and expertise is 
crucial to do so. With a disciplined, sustainable, and resilient approach, we are working to execute on a global strategy 
built on translational research and clinical development expertise, global regulatory capabilities, and proven commercial 
and market access successes. As of February 1, 2025, we had 283 employees – including 76 employees in 11 countries 
outside of North America, and we believe our employees are committed to learning from and collaborating with each 
other, each contributing to our mission. In 2024, the number of employees increased by 21 percent and we are proud to 
have maintained a rolling turnover rate of less than 11 percent. We believe we are recruiting and onboarding high quality 
talent in a competitive biotech environment, and our employees are choosing to stay and grow at Rhythm. We have been 
named to The Boston Globe’s Top Places to Work in Massachusetts list for 2023 and 2024.  
We believe that our future success largely depends upon our continued ability to attract, hire and retain highly 
skilled employees. We emphasize several measures and objectives in managing our human capital assets, including, among 
others, employee engagement and belonging, development and training, talent acquisition and retention, employee 
wellness, inclusion, and competitive compensation and pay equity. We frequently assess the external market with the aim 
to 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 
various aspects of their lives, including health care, retirement planning and paid time off. In addition, we regularly collect 
employee feedback in an effort to ensure open communication, measure employee engagement and identify opportunities 
for improvement.  We maintain efforts to ensure our employees are enabled to take advantage of flexible working 
arrangements. 
We believe that developing an 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; it is our policy to pursue the best talent and to not make employment (including hiring, promotion, 

53 
or compensation) or other contracting decisions on the basis of any legally protected characteristics. We continue to focus 
on ensuring 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 inspired to 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, and you should not consider information on our website to be part of 
this Annual Report. 
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. 
  
PART II - OTHER INFORMATION 
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 on Form 10-K for the period ended December 31, 2024 (the “Annual Report”), 
including our audited condensed 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 
significant 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 global, 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 primarily focused on 
developing and commercializing IMCIVREE® (setmelanotide) to treat patients living with hyperphagia and severe obesity 
caused by rare MC4R pathway diseases.  Our business activities have included 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.  To date 
 
 
 

54 
we have generated approximately $227.6 million of revenue from product sales.  In the United States, IMCIVREE is 
approved to reduce excess body weight and maintain weight reduction long term in adult and pediatric patients aged 
2 years and older with syndromic or monogenic obesity due to Bardet-Biedl syndrome (BBS) or pro-opiomelanocortin 
(POMC), proprotein convertase subtilisin/kexin type 1 (PCSK1), or leptin receptor (LEPR) deficiency as determined by 
an FDA-approved test demonstrating variants in POMC, PCSK1, or LEPR genes that are interpreted as pathogenic, likely 
pathogenic, or of uncertain significance (VUS).  The European Commission (EC) and the United Kingdom’s Medicines & 
Healthcare Products Regulatory Agency (MHRA) has authorized IMCIVREE for the treatment of obesity and the control 
of hunger associated with genetically confirmed BBS or genetically confirmed loss-of-function biallelic POMC, including 
PCSK1, deficiency or biallelic LEPR deficiency in adults and children 2 years of age and above.. Health Canada has 
approved IMCIVREE for weight management in adult and pediatric patients 6 years of age and older with obesity due to 
BBS or genetically-confirmed POMC, PCSK1, or LEPR deficiency due to variants interpreted as pathogenic, likely 
pathogenic, or of uncertain significance.  In total, to date we have achieved market access or named patient sales of 
IMCIVREE for BBS or POMC and LEPR deficiencies, or both, in more than 15 countries outside the United States, and 
we continue to collaborate with authorities to achieve access in additional markets. 
We first commercialized IMCIVREE in the United States in the first quarter of 2021 and therefore do not have a 
long history operating as a commercial company. We are continuing to transition 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 
transition. We are still at the early stages of demonstrating 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. 
In February 2023, in order to expand our pipeline and build on our focus on rare endocrinology diseases, we 
acquired Xinvento B.V., a Netherlands-based biotech company focused on developing therapies for congenital 
hyperinsulinism (CHI).  Our CHI program remains in the discovery phase and we do not expect to derive revenue from 
our CHI program for many years, if at all. There can be no assurance that regulatory approvals will be received or if 
received that they will be received when anticipated and ultimately we may fail to realize the anticipated benefits of our 
CHI program or those benefits may take longer to realize than expected. 
Since our inception, we have focused substantially all our efforts and financial resources on the research and 
development of setmelanotide, which is approved by the FDA and Health Canada and authorized by the EC and the 
MHRA, as noted above, and is in development to address patients affected by several other indications. We have funded 
our operations to date primarily through the proceeds from the sales of common stock and preferred stock, asset sales, 
royalty interest financing, 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 $260.6 million and $184.7 million for the years ended December 31, 2024 and 2023, 
respectively.  As of December 31, 2024, we had an accumulated deficit of $1,155.3 million. Substantially all 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, with 
clinical trials of our product candidates (RM-718), which is designed to be a more selective MC4R agonist with weekly 
administration (now in Phase 1 trials), and bivamelagon, an investigational oral small molecule, which is also designed to 
be a more selective MC4R agonist, (now in Phase 2 clinical trials), and with the development of any other product 
candidates we may choose to pursue, including a product candidate for CHI, yet to be identified. We also expect to devote 
substantial financial resources to the research and development and potential commercialization of a product candidate for 
CHI.    
In addition, since we have market access for IMCIVREE for BBS or POMC and LEPR deficiencies, or both, in 
more than 15 countries outside of the United States, we expect to continue to incur significant sales, marketing and 
outsourced manufacturing expenses. Nevertheless, setmelanotide may not be a commercially successful drug. We have 
and will continue to incur additional costs associated with operating as a public company. As a result, we expect to continue 

55 
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. 
Our ability to become profitable depends upon our ability to generate revenue. As of December 31, 2024, we 
have generated approximately $227.6 million of revenue from product sales. Our ability to generate revenue depends on 
a number of factors, including, but not limited to, our ability to: 
• 
continue to commercialize setmelanotide by building a commercial organization and/or entering into 
collaborations with third parties; 
• 
ensure IMCIVREE is available to patients; 
• 
continue to achieve market acceptance of setmelanotide in the medical community and with third-party 
payors; 
• 
continue to initiate and successfully complete later-stage clinical trials for setmelanotide, RM-718, 
bivamelagon, or other product candidates that meet their clinical endpoints; 
• 
continue to initiate and successfully complete all studies required to obtain U.S. and foreign marketing 
approvals for setmelanotide as a treatment to address patients with deficiencies affecting the MC4R pathway; 
and 
• 
successfully manufacture or contract with others to manufacture setmelanotide, or RM-718 and bivamelagon 
if approved. 
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 in its approved indications in the United 
States, Canada, the EU and the United Kingdom and advancing setmelanotide through clinical development for additional 
indications in the United States and for potential additional approvals in other countries. Developing pharmaceutical 
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, as well as in connection with 
research and development activities for setmelanotide, RM-718, and bivamelagon, and in connection with our CHI 
program and the potential identification and development of a product candidate for CHI. We intend to use our available 
cash resources to advance the clinical development of setmelanotide, for disease-education and community-building 
activities, 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 sales of 
IMCIVREE, we may still require significant additional capital to fund the continued development of setmelanotide and 
our operating needs thereafter, as well as research and development activities for setmelanotide, RM-718, bivamelagon, 
and a product candidate for our CHI program. 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 December 2024, we raised aggregate net proceeds of approximately $832.7 million through 
the issuance of our common stock after deducting underwriting discounts, commissions and offering related transaction 
costs. We 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. In June 2022, we entered into a Revenue 
Interest Financing Agreement, or RIFA, with HealthCare Royalty Partners for a total investment amount of up to $100.0 

56 
million, conditioned upon our achievement of certain clinical development and sales milestones. As of December 31, 2024, 
we have received $96.7 million of aggregate proceeds, net of debt issuance costs, under the RIFA. We also received 
$147.8 million in net proceeds under the Investment Agreement, with certain affiliates of Perceptive Advisors LLC, or 
Perceptive, and certain other investors, relating to the issuance and sale of 150,000 shares of a new series of the Company’s 
Series A Convertible Preferred Stock, par value $0.001 per share, titled the “Series A Convertible Preferred Stock”, or the 
Convertible Preferred Stock, for an aggregate purchase price of $150.0 million, or $1,000 per share. As of December 31, 
2024, our cash and cash equivalents and short-term investments were approximately $320.6 million. We expect that our 
existing cash and cash equivalents and short-term investments will be sufficient to fund our operations into 2027. 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, as well as for research and development activities for setmelanotide, RM-718, 
bivamelagon, and a product candidate for our CHI program. Raising funds in the current economic and geopolitical 
environment 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. 
We maintain the majority of our cash and cash equivalents in accounts with major U.S. and multi-national 
financial institutions, and our deposits at certain of these institutions exceed insured limits. Market conditions can impact 
the viability of these institutions. In the event of failure of any of the financial institutions where we maintain our cash and 
cash equivalents, there can be no assurance that we would be able to access uninsured funds in a timely manner or at all. 
Any inability to access or delay in accessing these funds could adversely affect our business and financial position. 
Any additional fundraising efforts may divert our management from their day-to-day activities, which may 
adversely affect our ability to commercialize IMCIVREE and develop setmelanotide, RM-718, bivamelagon, and a product 
candidate for our CHI program. 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. 
Our Revenue Interest Financing Agreement with Healthcare Royalty Partners could restrict our ability to 
commercialize IMCIVREE, limit cash flow available for our operations and expose us to risks that could adversely 
affect our business, financial condition and results of operations. 
On June 16, 2022, we entered into the RIFA, with entities managed by HealthCare Royalty Management, 
collectively referred to as the RIFA Investors. Pursuant to the RIFA and subject to customary closing conditions, the RIFA 
Investors agreed to pay us an aggregate investment amount of up to $100.0 million (the “RIFA Investment Amount”). 
Under the terms of the RIFA, we received $37.5 million on June 29, 2022 upon FDA approval of IMCIVREE in BBS, and 
an additional $37.5 million on September 29, 2022, following EC marketing authorization for BBS on September 6, 2022. 
On September 12, 2023, we received the remaining $24.4 million of the RIFA Investment Amount, net of debt issuance 

57 
costs, following the achievement of a specified amount of cumulative net sales of IMCIVREE between July 1, 2022 and 
September 30, 2023. 
As consideration for the Investment Amount and pursuant to the RIFA, we agreed to pay the RIFA Investors a 
tiered royalty on our annual net revenues (the “Revenue Interest”), including worldwide net product sales and upfront 
payments and milestones. The applicable tiered percentage will initially be 11.5% on annual net revenues up to 
$125 million, 7.5% on annual net revenues of between $125 million and $300 million and 2.5% on annual net revenues 
exceeding $300 million. If the RIFA Investors have not received cumulative minimum payments equal to 60% of the 
amount funded by the Investors to date by March 31, 2027 or 120% of the amount funded by the RIFA Investors to date 
by March 31, 2029, we must make a cash payment immediately following each applicable date to the Investors sufficient 
to gross the Investors up to such minimum amounts after giving full consideration of the cumulative amounts paid by us 
to the RIFA Investors through each date, referred to as the Under Performance Payment.  As the repayment of the funded 
amount is contingent upon worldwide net product sales and upfront payments, milestones, and royalties, the repayment 
term may be shortened or extended depending on actual worldwide net product sales and upfront payments, milestones, 
and royalties. As of December 31, 2024 we have made $20.4 million of payments, including $12.9 million in the year 
ended December 31, 2024. 
The RIFA Investors’ rights to receive the Revenue Interests will terminate on the date on which the RIFA 
Investors have received payments equal to a certain percentage of the funded portion of the Investment Amount including 
the aggregate of all payments made to the RIFA Investors as of such date, each percentage tier referred to as the Hard Cap, 
unless the RIFA is earlier terminated. The total Revenue Interests payable by us to the RIFA Investors is capped between 
185% and 250% of the RIFA Investment Amount paid to us, dependent on the aggregate royalty paid between 2028 and 
2032. If a change of control event occurs, the RIFA Investors may accelerate payments due under the RIFA, up to the 
Hard Cap plus any other obligations payable under the RIFA. 
Our obligations under the RIFA could have significant negative consequences for our security holders and our 
business, results of operations and financial condition by, among other things: 
• 
increasing our vulnerability to adverse economic and industry conditions; 
• 
limiting our ability to obtain additional financing or enter into IMCIVREE collaboration or other business 
agreements; 
• 
requiring the dedication of a portion of our cash flow from operations to service our indebtedness, which will 
reduce the amount of cash available for other purposes; 
• 
limiting our flexibility to plan for, or react to, changes in our business; 
• 
placing us at a possible competitive disadvantage with competitors that are less leveraged than us or have 
better access to capital; and 
• 
if we fail to comply with the terms of the RIFA, resulting in an event of default that is not cured or waived, 
Investors could seek to enforce their security interest in our cash and cash equivalents and all assets relating 
to IMCIVREE that secures such indebtedness. 
To the extent we incur additional debt (including without limitation additional amounts under the RIFA), the risks 
described above could increase.  

58 
Risks Related to the Development of Setmelanotide and Other Product Candidates and our CHI Program 
Positive results from earlier 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 in all 
patient populations studied and there can be no guarantee that future trials will achieve their endpoints. 
Positive results observed in one patient population are not necessarily predictive of positive results for other 
populations. 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 impairments 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 diseases of extreme and unrelenting 
appetite and obesity. We hypothesize that patients with other upstream genetic variants in genes upstream of the MC4R in 
the MC4R pathway may also respond with reductions in weight and hunger after treatment with setmelanotide. However, 
patients with other upstream genetic variants may not have a similar response to setmelanotide, and until we obtain more 
clinical data in other genetic variants, we will not be sure that we can achieve proof of concept or magnitude of response 
sufficient to demonstrate statistical significance in such populations. 
We are actively working to advance additional genetic variants related to patient populations carrying such 
genetic variants in other MC4R pathway related genes in the MC4R pathway through our clinical development programs. 
Our continued development efforts are focused on obesity related to several single gene, or monogenic, MC4R pathway 
impairments: BBS; obesity due to a genetic variant in one of the two alleles of the POMC, PCSK1 or LEPR gene, or HETs; 
obesity due to steroid receptor coactivator 1, or SRC1, variants; obesity due to SH2B adapter protein 1, or SH2B1; 
hypothalamic obesity; Prader-Willi Syndrome (PWS) and MC4R deficiency obesity. For example, in April 2022 we 
enrolled the first patient in our pivotal Phase 3 EMANATE clinical trial of setmelanotide. The trial is a randomized, 
double-blind, placebo-controlled study with four independent sub-studies evaluating setmelanotide in patients with: 
heterozygous POMC/PCSK1 obesity; heterozygous LEPR obesity; certain variants of the SRC1; or certain variants of 
SH2B1 genes. Each of the four sub-studies will be entirely independent of the others and, if successful, is designed to 
support separate regulatory submissions to the FDA and EMA in each studied population. However, the FDA and EMA 
may not view positive results in one sub-study, even if such results are statistically significant and clinically meaningful, 
as being sufficient for approval for any given indication. 
Success in a basket trial, or any trial in one cohort, may not predict success in another cohort. In contrast, in the 
event of an adverse safety issue, clinical hold, or other adverse finding in one or more cohorts being tested, such event 
could adversely affect our trials in the other cohorts and may delay or prevent completion of such 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 in clinical trials or in post-approval 
use in the real world, 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 EC or foreign regulatory authorities. If we fail to obtain positive results in our Phase 3 clinical trials 

59 
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, but even if we obtain 
results in our Phase 3 clinical trials that we believe are positive, there is no guarantee that the FDA or the EC or foreign 
regulatory authorities will agree that such results are sufficient to support submission or approval of an NDA or NDA 
supplement. 
Interim, “topline” and preliminary data from our preclinical and 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. 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. 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. 
From time to time, we may also disclose real-world data from early access programs in particular patient cohorts, 
which are not controlled trials and may not be predictive of future results. 
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 a 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 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 exclusive license agreement with LGC is important to our business. If we or LGC fail to adequately perform under 
the agreement, the development of bivamelagon could be delayed, or if we or LGC terminate the agreement, we would 
lose our rights to develop and commercialize bivamelagon. 
In January 2024, we entered into a license agreement and share issuance agreement with LGC. Pursuant to the 
terms of the license agreement, we obtained exclusive worldwide rights to develop LGC’s proprietary compound 
bivamelagon  and assumed sponsorship of two ongoing LGC Phase 2 studies designed to evaluate safety, tolerability, 
pharmacokinetics and weight loss efficacy of bivamelagon, one of which remains ongoing. Subject to the completion of 
Phase 2 development of bivamelagon, we agreed to pay LGC royalties of between low-to-mid single digit percent of net 
revenues from our MC4R portfolio, including bivamelagon, commencing in 2029 and dependent upon achievement of 
various regulatory and indication approvals, and subject to customary deductions and anti-stacking. Royalties may further 
increase to a low double digit percent royalty, though such royalty would only be applicable on net sales of bivamelagon 
in a region if bivamelagon is covered by a composition of matter or method of use patent controlled by LGC in such region 
and the Company’s MC4R portfolio is not covered by any composition of matter or method of use patents controlled by 

60 
the Company in such region. Such increased rate would only apply on net sales of bivamelagon for the limited remainder 
of the royalty term in the relevant region.  The license agreement will continue until the expiration of the obligation to pay 
royalties in all countries or regions, unless terminated earlier. We or LGC can terminate the license agreement in certain 
circumstances, including for the other party’s material uncured breach. If the license agreement is terminated, we would 
lose our rights to develop and commercialize bivamelagon, and, under some circumstances, we could be subject to certain 
ongoing payments, penalties and fees, all of which in turn would have a material adverse effect on our business. 
The number of patients with each of the MC4R pathway variants 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 individuals with severe obesity that provide another approach to estimating 
prevalence. As of December 31, 2024, our database had approximately 100,000 sequencing samples. Since the published 
epidemiology studies for these genetic variants 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 (which remain subject to change based 
on ongoing research and publications by us or any third party): 
• 
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. 
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 adults with severe obesity (body mass index, or BMI, greater than 
40 kg/m2) and for children with severe early-onset obesity (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 diseases), defined as patients having biallelic variants in the POMC or PCSK1 genes that are 
interpreted as pathogenic, likely pathogenic, or of uncertain significance, of approximately 0.05%. 

61 
• 
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. 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 adults with 
severe obesity (BMI, greater than 40 kg/m2) and for children with severe early-onset obesity (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 diseases 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, of approximately 0.09%. 
• 
Bardet-Biedl Syndrome. Our addressable patient population estimate for BBS is approximately 4,000 to 
5,000 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;  
• 
comparisons to our patient identification efforts in Europe where we believe there are approximately 
1,500 patients diagnosed and being cared for at academic centers in Europe;  
• 
our patient identification efforts to date in the United States;  
• 
our internal sequencing yield for biallelic pathogenic or likely pathogenic variants in BBS genes of 
approximately 0.3%; 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. 
• 
POMC, PCSK1, or LEPR Heterozygous Obesities; SRC1 and SH2B1 Obesities. Our potential 
setmelanotide-responsive patient population estimate for POMC, PCSK1, or LEPR heterozygous, SRC1 
and SH2B1 obesity patients with at least one variant interpreted as pathogenic, likely pathogenic, or of 
uncertain significance suspected pathogenic is approximately 53,000 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 with onset prior to 6 years of age); 
• 
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 of 
approximately 10-15%; and 

62 
• 
a clinical response rate of 40% for patients carrying pathogenic or likely pathogenic variants, and 
20% for patients carrying a variant of uncertain significance. 
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 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. 
• 
Hypothalamic obesity. Our addressable patient population estimate for hypothalamic obesity (HO) is 5,000 
to 10,000 patients in the United States. This estimate is based on: 
• 
diagnosis of an underlying HO etiology such as craniopharyngioma (CP), astrocytoma, or other brain 
tumors with CP accounting for approximately 50% of HO etiologies; 
• 
an annual incidence of CP of approximately 1.3 to 2.2 per million per year in the United States, which 
projects to approximately 600 cases of CP per year based on a United States population of approximately 
329 million; 
• 
approximately 50% (based on a published range of 6% to 91%) of CP patients develop HO; 
• 
published estimates of overall survival (OS) after CP diagnosis, with a 20-year OS of 84%; 
• 
allowing for patients that develop HO due to other factors besides CP, results in an estimated HO 
prevalence after CP diagnosis in the United States exceeding 2,500-7,500 patients; and 
• 
internal Company estimate is based on reported incidence of hypothalamic obesity following CP and 
long-term survival rates. 
• 
Obesity due to a deficiency in the MC4R pathway caused by variants in the SEMA3 family, PHIP, TBX3 or 
PLXNA family. Our addressable patient population estimate for obesity patient with variants in these genes 
is approximately 63,500 patients in the United States. This estimate is based on: 
• 
results from our URO genetic testing program with samples from more than 36,000 participants, 
classification of variants for pathogenic, likely pathogenic and 20% of with a variant of uncertain 
significance and applied to established estimate of approximately 5 million people in the United States 
with early-onset obesity. 
We believe that the patient populations in the EU are similar to 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. 

63 
Defining the exact genetic variants that result in MC4R pathway diseases 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, including general obesity, 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 public 
health emergencies; 
• 
ability to obtain and maintain patient consents; 
• 
patient referral practices of physicians; 
• 
the ability to monitor patients adequately during and after treatment; 

64 
• 
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 health conditions or being forced to quarantine, or, because they may be late-stage cancer patients 
or for other reasons, will not survive the full terms of the clinical trials. 
In addition, the pediatric population is an important patient population for setmelanotide, RM-718, and 
bivamelagon, and our addressable patient population estimates include pediatric populations. However, it may be more 
challenging to conduct studies in younger participants, 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 could result in increased costs to 
us and could delay, prevent or limit our ability to generate revenue, achieve profitability 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, at a minimum, will be required 
for regulatory approvals and the commercial marketing of setmelanotide for additional indications as well as RM-718 and 
bivamelagon. 
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 such trial may be suspended; 
• 
delays in filing or receiving authorization to proceed under an additional investigational new drug 
application, or IND, or similar foreign application 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 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 or maintaining Institutional Review Board, or IRB, and/or ethics committee approval 
or opinion to conduct a clinical trial at a prospective site or sites; 

65 
• 
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, RM-718, bivamelagon 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 GCPs or applicable regulatory guidelines in other countries; 
• 
occurrence of adverse events associated with setmelanotide, RM-718 or bivamelagon that are viewed to 
outweigh their 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 or related non-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 
delay 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, a clinical trial may be suspended or terminated by us, the FDA or other equivalent competent 
authorities in foreign jurisdictions, the IRB at the sites where the IRBs 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; 

66 
• 
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; 
• 
inconclusive results, 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 or non-clinical studies or clinical trials of setmelanotide, RM-718 or 
bivamelagon will increase our costs, slow down our product candidate development and the regulatory approval processes 
and delay or potentially jeopardize our ability to commence product sales, generate product revenue and achieve 
profitability. 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, RM-718 or bivamelagon. 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, RM-718 or bivamelagon, in each case if approved, 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. 
In addition, the FDA’s and other regulatory authorities’ policies with respect to clinical trials may change and 
additional government regulations may be enacted. For instance, the regulatory landscape related to clinical trials in the 
EU recently evolved. The EU Clinical Trials Regulation (CTR) which was adopted in April 2014 and repeals the EU 
Clinical Trials Directive, became applicable on January 31, 2022. While the EU Clinical Trials Directive required a 
separate clinical trial application (CTA) to be submitted in each member state in which the clinical takes place, to both the 
competent national health authority and an independent ethics committee, the CTR introduces a centralized process and 
only requires the submission of a single application for multi-center trials. The CTR allows sponsors to make a single 
submission to both the competent authority and an ethics committee in each member state, leading to a single decision per 
member state. The assessment procedure of the CTA has been harmonized as well, including a joint assessment by all 
member states concerned, and a separate assessment by each member state with respect to specific requirements related to 
its own territory, including ethics rules. Each member state’s decision is communicated to the sponsor via the centralized 
EU portal. Once the CTA is approved, clinical study development may proceed. The CTR transition period ended on 
January 31, 2025 and all clinical trials (and related applications) are now fully subject to the provisions of the CTR. 
Compliance with the CTR requirements by us and our third-party service providers, such as CROs, may impact our 
developments plans. 
It is currently unclear to what extent the United Kingdom will seek to align its regulations with the EU. On 
January 17, 2022, the MHRA launched an eight-week consultation on reframing the UK legislation for clinical trials and 
which aimed to streamline clinical trials approvals, enable innovation, enhance clinical trials transparency, enable greater 
risk proportionality, and promote patient and public involvement in clinical trials. The UK Government published its 
response to the consultation on March 21, 2023 confirming that it would bring forward changes to the legislation. These 
resulting legislative amendments will determine how closely the UK regulations are aligned with the CTR. A decision by 
the UK not to closely align its regulations with the new approach adopted in the EU may have an effect on the cost of 
conducting clinical trials in the UK as opposed to other countries. Under the terms of the Protocol on Ireland/Northern 
Ireland, provisions of the CTR which relate to the manufacture and import of investigational medicinal products and 
auxiliary medicinal products apply in Northern Ireland. Once the changes brought by the Windsor Framework are 
implemented, this may have a further impact on the application of the CTR in Northern Ireland. 
If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or 
policies governing clinical trials, our development plans may be impacted. 

67 
Research and development in the pharmaceutical industry is costly, risky, time-intensive and complicated.  In 
particular, our CHI program is a pre-clinical discovery-stage program and we may not succeed in identifying a CHI 
program candidate to translate to development and even if we do we may not succeed in developing a CHI program 
product candidate. 
Research and development in the pharmaceutical industry is an expensive, high-risk, lengthy, complicated, 
resource intensive process. In order to develop a product successfully, we must, among other things: 
• 
conduct scientific discovery in areas that are uncertain, unproven and complex; 
• 
identify potential product candidates; 
• 
submit for and receive regulatory approvals or allowances to perform clinical trials; 
• 
design and conduct appropriate preclinical studies and clinical trials according to good laboratory practices 
and good clinical practices and disease-specific expectations of the FDA and other regulatory bodies; 
• 
Select and recruit suitable clinical investigators and subjects for our clinical trials; 
• 
Obtain and correctly interpret data establishing adequate safety of our product candidates and demonstrating 
that our product candidates are effective for their proposed indications; 
• 
Submit for and receive regulatory approvals; and 
• 
Manufacture the product candidates according to current Good Manufacturing Practices, or cGMPs, and 
other applicable standards and regulations. 
There is a high rate of failure inherent in this process, and potential products that appear promising at early stages 
of the research and development process may fail for a number of reasons. Importantly, positive results from preclinical 
studies of a product candidate may not be predictive of similar results in human clinical trials, promising results from 
earlier clinical trials of a product candidate may not be replicated in later clinical trials, and observations from ongoing 
trials, including observations based on interim, preliminary, or blinded data, may not be representative of results after the 
trials are completed and all data are collected and analyzed. Many companies in the pharmaceutical and biotechnology 
industries have suffered significant setbacks in late-stage clinical trials even after achieving positive results in earlier stages 
of development and have abandoned development efforts or sought partnerships in order to continue development. 
In addition, there are many other difficulties and uncertainties inherent in pharmaceutical research and 
development that could significantly delay or otherwise materially impair our ability to develop future product candidates, 
including the following: 
• 
Conditions imposed by regulators, ethics committees or institutional review boards for preclinical testing and 
clinical trials relating to the scope or design of our clinical trials, including selection of endpoints and number 
of required patients or clinical sites; 
• 
Challenges in designing clinical trials that may support any potential claims of superiority over current 
standard of care or future competitive therapies; 
• 
Restrictions placed upon, or other difficulties with respect to, clinical trials and clinical trial sites, including 
with respect to potential clinical holds or suspension or termination of clinical trials due to, among other 
things, potential safety or ethical concerns or noncompliance with regulatory requirements; 

68 
• 
Delayed or reduced enrollment in clinical trials, high discontinuation rates or overly concentrated patient 
enrollment in specific geographic regions; 
• 
Failure by third-party contractors, contract research organizations, or CROs, clinical investigators, clinical 
laboratories, or suppliers to comply with regulatory requirements or meet their contractual obligations in a 
timely manner; 
• 
Greater than anticipated cost of our clinical trials; and 
• 
Insufficient product supply or inadequate product quality. 
• 
Evolving competitive landscape for our products and product candidates, which could cause us to modify 
our development programs, notwithstanding positive data or trial results in existing trials, in order to seek 
alternate indications or routes of administration or to substitute or otherwise modify our product candidates 
in light of the evolving competitive landscape and changing commercial prospects for our product and 
product candidates. 
In addition, we cannot state with certainty when or whether our CHI program will ever identify a product 
candidate to translate from research to the development stage or whether our other product candidates now under 
development will be approved or launched; whether, if initially granted, such approval will be maintained; whether we 
will be able to develop, license, or otherwise acquire additional products or product candidates; or whether our products, 
once launched, will be commercially successful.  
Failure to successfully develop setmelanotide for additional indications or to develop product candidates for any 
of the foregoing reasons may materially adversely affect our business, financial condition, results of operations and 
prospects and the value of our common stock. 
Setmelanotide, RM-718 or bivamelagon 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, RM-718 or bivamelagon 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. 
Setmelanotide, RM-718 and bivamelagon are MC4R agonists. 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; 

69 
• 
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. Also, 
setmelanotide has likely off target effects on the closely related MC1 receptor, which mediates skin pigmentation in 
response to sun exposure. Other MC1 receptor mediated effects include darkening of skin blemishes, such as freckles and 
moles, and hair color change. These MC1 receptor mediated skin effects are not tolerated by all patients, as a small number 
of patients have withdrawn from treatment due to skin darkening. These effects have generally been reversible in clinical 
trials after discontinuation of setmelanotide, 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. 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, RM-718 or bivamelagon from obtaining or 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 associated with or caused by the products, 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; 
• 
the FDA, the EU competent authorities 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; 

70 
• 
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; 
• 
our other MC4 agonist products or product candidates may be perceived by regulators or other third parties 
as unsafe, which could adversely affect our development efforts and product portfolio; 
• 
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, RM-718 
or bivamelagon, and could substantially increase the costs of commercializing setmelanotide, RM-718 or bivamelagon 
and significantly impact our ability to successfully commercialize setmelanotide, RM-718 or bivamelagon and generate 
revenues. 
We may not be able to obtain or maintain orphan drug designations for setmelanotide, RM-718 or bivamelagon or to 
obtain or maintain orphan exclusivity. Even with exclusivity, competitors may obtain approval for different drugs that 
treat the same indications as setmelanotide, RM-718 and bivamelagon. 
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 
disease or condition 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 disease or condition 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 designation is granted by the EC based on a scientific opinion of the EMA’s Committee for 
Orphan Medicinal Products. A medicinal product may be designated as orphan if its sponsor can establish that (i) the 
product is intended for the diagnosis, prevention or treatment of a life-threatening or chronically debilitating condition; 
(ii) either (a) such condition affects no more than 5 in 10,000 persons in the EU when the application is made, or (b) the 
product, without the benefits derived from orphan status, would not generate sufficient return in the EU to justify 
investment; and (iii) there exists no satisfactory method of diagnosis, prevention or treatment of such condition authorized 
for marketing in the EU, or if such a method exists, the medicinal product will be of significant benefit to those affected 
by the condition. The application for orphan designation must be submitted before the application for marketing 
authorization. 
Grant of orphan designation by the EC also entitles the holder of this designation to financial incentives such as 
reduction of fees or fee waivers, protocol assistance, and access to the centralized marketing authorization procedure. In 

71 
addition to a range of other benefits during the development and regulatory review, orphan medicinal products are, upon 
grant of marketing authorization and assuming the requirement for orphan designation are also met at the time the 
marketing authorization is granted, entitled to ten years of exclusivity in all EU member states for the approved therapeutic 
indication, which means that the competent authorities cannot accept another MAA, grant a marketing authorization, or 
accept an application to extend a marketing authorization for a similar product for the same indication for a period of ten 
years. The period of market exclusivity is extended by two years for orphan medicinal products that have also complied 
with an agreed pediatric investigation plan, or PIP. No extension to any supplementary protection certificate can be granted 
on the basis of pediatric studies for orphan indications. Orphan medicinal product designation does not convey any 
advantage in, or shorten the duration of, the regulatory review and approval process. 
The ten-year market exclusivity in the EU may be reduced to six years if, at the end of the fifth year, it is 
established that the product no longer meets the criteria for which it received orphan designation, including where it is 
shown that the product is sufficiently profitable not to justify maintenance of market exclusivity, or where the prevalence 
of the condition has increased above the threshold. Additionally granting of an authorization for another similar orphan 
medicinal product where another product has market exclusivity can happen at any time: (i) the second applicant can 
establish that its product, although similar, is safer, more effective or otherwise clinically superior; (ii) the applicant cannot 
supply enough orphan medicinal product or (iii) where the applicant consents to a second orphan medicinal product 
application. 
In connection with IMCIVREE’s approval, the FDA granted us seven years of orphan drug exclusivity for 
setmelanotide 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. The FDA also granted us seven 
years of orphan drug exclusivity for setmelanotide for chronic weight management in adult and pediatric patients 6 years 
of age and older with monogenic or syndromic obesity due to BBS. In the EU, we obtained ten years of market exclusivity 
for setmelanotide for the treatment of obesity and the control of hunger associated with genetically confirmed loss-of-
function biallelic POMC, including PCSK1, deficiency or biallelic LEPR deficiency in adults and children 6 years of age 
and above.  Following the FDA’s approval of the expanded indication for IMCIVREE to include patients as young as 
2 years of age in December 2024, we believe the FDA will review the request we made to similarly expand the scope of 
the current orphan drug exclusivity for IMCIVREE, however, we cannot estimate when or if the scope of IMCIVREE’s 
orphan drug exclusivity will be expanded. 
We have also been granted orphan designation for setmelanotide for the treatment of Alström syndrome in both 
the United States and the EU. Setmelanotide has also been granted orphan designation for setmelanotide in treating Prader-
Willi syndrome and acquired hypothalamic obesity in the EU. There can be no assurance that we will be able to maintain 
the benefits of orphan drug exclusivity, or that the FDA or the EC will grant orphan designations 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 though we have obtained orphan drug exclusivity for certain uses of setmelanotide, such exclusivities 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. 

72 
Although we have obtained Breakthrough Therapy designation for setmelanotide for the treatment of obesity associated 
with certain defects upstream of the MC4R in the leptin melanocortin pathway, which includes POMC deficiency 
obesity, LEPR deficiency obesity, Bardet-Biedl syndrome and Alström syndrome, as well as hypothalamic obesity in the 
United States and PRIME designation in the EU for setmelanotide for the treatment of obesity and the control of hunger 
associated with deficiency disorders of the MC4R pathway, the FDA may rescind the Breakthrough Therapy 
designation and the EMA may withdraw the PRIME designation and we may be unable to obtain Breakthrough 
Therapy designation or the PRIME designation for other uses. In addition, Breakthrough Therapy designation by the 
FDA or PRIME designation by the EMA may not lead to a faster development, regulatory review or approval process, 
and neither do they increase the likelihood that setmelanotide will receive additional marketing approvals in the United 
States or additional marketing authorizations in the EU. 
The FDA is authorized under the FDCA to give certain product candidates “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 or biologics, to treat a serious or life-threatening disease or condition, where 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, a process also known as 
rolling review. Product candidates designated as breakthrough therapies by the FDA may be eligible for other expedited 
programs, such as priority review, provided the relevant criteria are met. 
Designation as Breakthrough Therapy is within the discretion of the FDA. Accordingly, even if we believe our 
product candidates meet the criteria for designation as Breakthrough Therapy, 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 (PRIority MEdicines) scheme was launched by the EMA in 2016. In the EU, innovative products 
that target an unmet medical need and are expected to be of major public health interest may be eligible for a number of 
expedited development and review programs, such as the PRIME scheme, which provides incentives similar to the 
Breakthrough Therapy designation in the United States. PRIME is a voluntary scheme aimed at enhancing the EMA’s 
support for the development of medicines that target unmet medical needs. It is based on increased interaction and early 
dialogue with companies developing promising medicines, to optimize their product development plans and speed up their 
evaluation to help them reach patients earlier. The benefits of a PRIME designation include the appointment of a rapporteur 
before submission of an MAA, early dialogue and scientific advice at key development milestones, and the potential to 
qualify products for accelerated review earlier in the application process. In late June 2018, setmelanotide was granted 
eligibility to PRIME by the Committee for Medicinal Products for Human Use, or CHMP for the treatment of obesity and 
the control of hunger associated with deficiency disorders of the MC4R receptor pathway. 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. However, the EMA may later decide that such product candidates no longer meet the conditions for 
qualification or decide that the time period for review or approval will not be shortened. Neither does the PRIME 
designation guarantee that the EC will grant additional marketing authorizations for setmelanotide. 
Product developers that benefit from PRIME designation may be eligible for accelerated assessment (in 150 days 
instead of 210 days), which may be granted for medicinal products of major interest from a public health perspective or 
that target an unmet medical need, but this is not guaranteed. 

73 
We may not be able to translate the once-daily, subcutaneous injection formulations of setmelanotide into alternate 
formulations, including alternate methods of delivery for setmelanotide or alternative methods of delivery for or other 
product candidates 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 subcutaneous (SC) injection using small insulin type 
needles and syringes. 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 would be injected once weekly. 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. 
While we have started consultations with regulatory authorities about the potential path for approval of the once-
weekly formulation, and have initiated clinical studies 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. 
While we believe that this once-weekly formulation may be more convenient and less burdensome than 
setmelanotide, which is currently approved as a once-daily administration, we have paused development of this once-
weekly formulation in favor of advancing RM-718. In the event RM-718 shows sufficiently positive efficacy and safety 
results, we plan to discontinue development of the weekly formulation of setmelanotide.  Concurrently, we are engaging 
with applicable regulatory authorities to address the impact of our discontinuing development of the weekly formulation 
of setmelanotide, which was a component of our pediatric investigation plan, or PIP, in the EU (and the United Kingdom) 
and in January 2025 we submitted a request to modify the PIP to remove elements related to the weekly formulation and 
we expect to receive a decision sometine in Q2 2025.  We cannot estimate the probability of success with respect to our 
development of additional formulations, nor the resources and time needed to succeed. If we are unable to develop and 
gain approval of new formulations of setmelanotide or of our other product candidates, our products may not achieve 
significant market acceptance and our business, financial condition and results of operations may be materially harmed. 
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 certification 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 certification of an in vitro companion diagnostic device would require substantial 
financial resources, and could delay or prevent the receipt of additional regulatory approvals for setmelanotide, or 
adversely affect those approvals 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. 
In the EU, until May 25, 2022, in vitro diagnostic medical devices were regulated by Directive 98/79/EC, or the 
IVDD, which has been repealed and replaced by Regulation (EU) No 2017/746, or the IVDR. Unlike the IVDD, the IVDR 
is directly applicable in EU member states without the need for member states to implement into national law. The 

74 
regulation of companion diagnostics is now subject to further requirements set forth in the IVDR. Following subsequent 
legislative changes, European institutions adopted a “progressive” roll-out of the IVDR to prevent disruption in the supply 
of in vitro diagnostic medical devices. The IVDR became applicable on May 26, 2022 but there is a tiered system extending 
the grace period for many devices (depending on their risk classification) before they have to be fully compliant with the 
regulation. For instance, under these provisions, class C devices (including devices that are intended to be used as 
companion diagnostics) had until May 26, 2026 to comply with the new requirements. In June 2024, to address issues 
related to notified body capacity, the EC adopted an extension of the grace period, resulting in an extended transition 
period until December 31, 2028 for certain class C devices, subject to compliance with the transitional provisions. The 
IVDR introduces a new classification system for companion diagnostics which are now specifically defined as diagnostic 
tests that support the safe and effective use of a specific medicinal product, by identifying patients that are suitable or 
unsuitable for treatment. Companion diagnostics will have to undergo a conformity assessment by a notified body. Before 
it can issue an EU certificate, the notified body must seek a scientific opinion from the EMA on the suitability of the 
companion diagnostic to the medicinal product concerned if the medicinal product falls exclusively within the scope of 
the centralized procedure for the authorization of medicines, or the medicinal product is already authorized through the 
centralized procedure, or MAA for the medicinal product has been submitted through the centralized procedure. For other 
substances, the notified body can seek the opinion from a national competent authority or the EMA. These modifications 
may make it more difficult and costly for us to obtain regulatory clearances or approvals or certification for our companion 
diagnostics or to manufacture, market or distribute our products after clearance, approval or certification is obtained. 
Compliance with the new requirements may impact our development plans for setmelanotide. 
If the FDA or a comparable regulatory authority requires clearance, approval or certification of a companion 
diagnostic for setmelanotide, RM-718 or bivamelagon, any delay or failure by us or our current and future collaborators 
to develop or obtain regulatory clearance or approval of, or certification of, 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 January 2022, the FDA granted the de novo request for classification for the 
POMC/PCSK1/LEPR CDx Panel for market authorization as a Class II device. If the FDA or a comparable regulatory 
authority requires clearance, approval or certification of a companion diagnostic when we seek additional approvals for 
setmelanotide, RM-718 or bivamelagon, any delay or failure by us or our current and future collaborators to develop or 
obtain regulatory clearance or approval of, or certification of, 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 research and discovery activities and in 
our clinical trials. If these third parties do not successfully carry out their contractual obligations or meet expected 
timelines, we may not be able to advance our pre-clinical and clinical programs or obtain, on a timely basis or at all, 
additional regulatory approvals for or commercialize our product candidates, and our business could be substantially 
harmed. 
We have agreements with third-party CROs to operationalize, provide monitors for and to manage data for our 
research and discovery efforts (including in our CHI program) and our ongoing clinical trials. We rely heavily on these 
parties for the execution of research and discovery activities and clinical trials and control only certain aspects of their 
activities. As a result, we have less direct control over the start-up, conduct, timing and completion of these activities and 
clinical trials, and the management of data developed through these activities and 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 activities and these trials and are subject to enforcement which may include civil and criminal liabilities for any 

75 
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, among others, may materially adversely affect the willingness or ability of third parties to conduct 
our research and discovery activities and our clinical trials and may subject us to unexpected cost increases that are beyond 
our control. Nevertheless, we are responsible for ensuring that all of our activities and each of our studies is conducted in 
accordance with the applicable protocol, legal, regulatory and scientific standards, and our reliance on third parties, 
including CROs, does not relieve us of our regulatory responsibilities. We and our CROs are required to comply with 
GCPs, which are regulations and 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 and foreign 
regulatory authorities enforce GCPs through periodic inspections of clinical trial sponsors, principal investigators, and trial 
sites, and IRBs. If we or our CROs fail to comply with applicable GCPs, 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, if ever. We cannot assure you that, upon 
inspection, the FDA or foreign regulatory authorities will determine that any of our clinical trials have complied with 
GCPs. In addition, our clinical trials must be conducted with products produced under cGMPs and similar foreign 
requirements. 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 obligations or meet expected timelines, if 
they need to be replaced or if the quality or accuracy of the clinical and other data they obtain are compromised due to the 
failure to adhere to our protocols, regulatory requirements or for other reasons, any related activities or clinical trials may 
be extended, delayed or terminated, and we may not be able to obtain regulatory approval for, or successfully 
commercialize a CHI therapeutic product, setmelanotide, RM-718 or bivamelagon. As a result, our financial results and 
the commercial prospects for setmelanotide, RM-718 or bivamelagon, would be harmed, our costs could increase and our 
ability to generate revenue could be delayed. 
Risks Related to the Commercialization of IMCIVREE and, if Approved, our Products Candidates 
The successful commercialization of IMCIVREE and any other product candidates for which we obtain approval will 
depend in part on the extent to which governmental authorities, private health insurers, and other third-party payors 
provide coverage and adequate reimbursement. Failure to obtain or maintain coverage and adequate reimbursement 
for IMCIVREE 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 successfully commercialize IMCIVREE or any other product candidates for which we obtain 
approval 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 

76 
authorities and third-party payors, such as private health insurers and health maintenance organizations, decide which 
medications they will pay for and provide reimbursement. 
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 recently approved 
products, such as IMCIVREE, and, as a result, they may not cover or provide adequate payment. Even if we show improved 
efficacy or improved convenience of administration, 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 IMCIVREE 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 IMCIVREE to each payor separately, with no assurance that coverage and adequate 
reimbursement will be applied consistently or obtained in the first instance or that step edits or other conditions on 
reimbursement will not be imposed. 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, the United Kingdom 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 IMCIVREE with other available therapies. If reimbursement for IMCIVREE 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 IMCIVREE 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 Canada, the United Kingdom 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. The extent to which 
pricing and reimbursement decisions are influenced by the HTA of the specific medicinal product varies . In addition, in 
the EU, 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 

77 
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. 
On December 13, 2021, Regulation No 2021/2282 on HTA, amending Directive 2011/24/EU, was adopted. The 
Regulation entered into force in January 2022 and has been applicable since January 2025, with phased implementation 
based on the type of product, i.e. oncology and advanced therapy medicinal products as of 2025, orphan medicinal products 
as of 2028, and all other medicinal products by 2030.  This Regulation intends to boost cooperation among EU member 
states in assessing health technologies, including new medicinal products, and provide the basis for cooperation at the EU 
level for joint clinical assessments in these areas. It will permit EU member states to use common HTA tools, 
methodologies, and procedures across the EU, working together in four main areas, including joint clinical assessment of 
the innovative health technologies with the highest 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. 
If we are unable to establish, maintain or expand our sales, marketing and distribution capabilities or enter into 
agreements with third parties to market, sell, and distribute IMCIVREE, we may not be able to generate revenue. 
In order to market IMCIVREE, we must continue to build our sales, marketing, distribution, managerial and other 
non-technical capabilities or make arrangements with third parties to perform these services. Although we have received 
FDA and Health Canada approval, and EC and MHRA marketing authorization for certain indications, we are early in our 
commercialization efforts. 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, maintain or expand our sales, marketing, market access, named patient sales, patient services, reimbursement 
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, Canada, the European 
Union and the United Kingdom. 
We intend to seek marketing authorizations in various countries worldwide. In order to market any product 
outside of the United States, Canada, the EU or the United Kingdom, 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 or 
marketing authorization from the EC or the MHRA. 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 and Europe, 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 or maintain market acceptance for IMCIVREE, which would limit the revenue that we generate 
from the sale of IMCIVREE. 
The commercial success of IMCIVREE will also depend upon the awareness and acceptance of IMCIVREE 
within the medical community, including physicians, patients and third-party payors. If IMCIVREE does not achieve or 

78 
maintain 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 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 clinical diagnosis and/or genetic testing, as needed, for certain of IMCIVREE’s 
indications, including obtaining and interpreting clinical or 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 patients with obesity; 
• 
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 EC; 
• 
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 and our ability to increase awareness of IMCIVREE 
through marketing efforts; 
• 
our ability to obtain sufficient third-party coverage or reimbursement; 

79 
• 
the willingness of patients to pay out-of-pocket in the absence of third-party coverage (including in the case 
of named patient sales, which can be a costly and uncertain source of revenues) and the willingness of 
healthcare providers to obtain reimbursement, which can be challenging and may factor into their decision 
to prescribe IMCIVREE; and 
• 
the likelihood that competent authorities in foreign jurisdictions may require development of a REMS or 
other specific obligations as a condition of approval or post-approval, may not agree with our proposed 
REMS or other specific obligations, or may impose additional requirements that limit the promotion, 
advertising, distribution or sales of IMCIVREE. 
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 and generate data that could, even absent 
regulatory approvals, establish a perception of efficacy in our targeted patient population, which could make IMCIVREE 
appear 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, payors 
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 and our other product candidates. 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 treatment approved to reduce excess body weight and maintain weight 
reduction long term in patients with obesity due to BBS or POMC, PCSK1 or LEPR deficiencies, and there are no 
comparable treatments approved for patients with 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, 
and hypothalamic obesity. Bariatric surgery is often not considered an appropriate 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 poor outcomes with bariatric surgery. Also, existing therapies indicated for general obesity, including glucagon-
like peptide-1 (GLP-1) receptor agonists, and glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like 
peptide-1 (GLP-1) agonists, do not specifically restore function impaired by genetic deficiencies in the MC4R pathway, 
which we believe is the root cause of hyperphagia and obesity in patients with MC4R genetic variants. At present, we are 
aware of multiple ongoing research and development programs for general obesity with various new mechanisms of action 
including some MC4R agonists.  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, RM-718, and bivamelagon 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 

80 
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; 
• 
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 and commercial product with a 
$20.0 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. 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, 
RM-718, and bivamelagon, 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, RM-718, bivamelagon, 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 
successfully complete 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 NDAs, NDA supplements or comparable 
foreign regulatory submissions to the other equivalent competent authorities in foreign jurisdictions. Our failure or the 
failure of our CMOs to successfully complete any potential preapproval inspections of the manufacturing facilities of 
setmelanotide, RM-718, and bivamelagon could delay the regulatory approval process. In addition, our clinical trials must 
be conducted with products produced in accordance with GMP and similar foreign 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 

81 
which could significantly impact the global supply chain for setmelanotide, RM-718, and bivamelagon. 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, RM-718, and bivamelagon 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 Switzerland, LLC, or Corden, (formerly Peptisyntha SA prior to its acquisition by 
Corden), and Neuland Laboratories for certain process development and manufacturing services for regulatory starting 
materials and/or raw materials in connection with the manufacture of setmelanotide. We have entered into long-term 
commercial supply agreements with PolyPeptide Group and Astrea MONTS S.A.S. for manufacturing of drug substance 
and drug product for IMCIVREE. 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. 
We do not perform the manufacturing of any drug products and are completely dependent on our CMOs to comply 
with GMPs and similar foreign requirements for manufacture of both drug substance, or 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 GMPs and similar foreign requirements, and, therefore, the company’s management 
practices and oversight, including routine auditing, are critical. If our CMOs cannot successfully manufacture material that 
conforms 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, RM-718, and bivamelagon 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, RM-718, and 
bivamelagon 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, RM-718, or 
bivamelagon. 
Our CMOs 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, RM-718, bivamelagon, 
and placebo to complete our ongoing and planned clinical trials, and for commercial IMCIVREE 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, RM-718, and bivamelagon, and our commercial IMCIVREE supply, which could delay, prevent or limit 
our ability to generate revenue and continue our business. 
We do not have long term supply agreements in place with all of our contractors involved with the manufacturing 
of our weekly formulation of setmelanotide, RM-718, and bivamelagon. We currently place individual batch or campaign 
orders with the CMOs/suppliers that are individually contracted under existing master services and quality agreements for 
the weekly formulation of setmelanotide, RM-718, and bivamelagon. 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 and foreign regulatory authorities may have to approve 
these changes. We plan to continue to rely upon CMOs and, potentially, collaboration partners to manufacture commercial 
quantities of setmelanotide, RM-718, and bivamelagon, if approved. Our current scale of manufacturing appears adequate 

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to support all of our current needs for clinical trial and initial commercial supplies for setmelanotide, RM-718, and 
bivamelagon, if approved. Going forward, we may need to identify additional CMOs or partners to produce setmelanotide, 
RM-718, and bivamelagon on a larger scale. 
In light of our election to terminate the exclusive license agreement with RareStone Group Ltd., or RareStone, the 
development of setmelanotide in certain indications and commercialization of IMCIVREE in certain markets could be 
delayed or terminated and our business could be adversely affected. 
In December 2021, we entered into an Exclusive License Agreement with RareStone, or the RareStone License. 
Pursuant to the RareStone License, we granted to RareStone an exclusive, sublicensable, royalty-bearing license under 
certain patent rights and know-how to develop, manufacture, commercialize and otherwise exploit any pharmaceutical 
product that contains setmelanotide in the diagnosis, treatment or prevention of conditions and diseases in humans in 
China, including mainland China, Hong Kong and Macao. RareStone has a right of first negotiation in the event that we 
choose to grant a license to develop or commercialize the licensed product in Taiwan. 
On October 28, 2022, we delivered a written notice to RareStone that we have terminated the RareStone License 
for cause (the “October 2022 Notice”). In accordance with the October 2022 Notice, we maintain that RareStone has 
materially breached its obligations under the RareStone License to fund, perform or seek certain key clinical studies and 
waivers, including with respect to our global EMANATE trial, among other obligations. On December 21, 2022, 
RareStone provided us written notice that it objects to the claims in our October 2022 Notice, including our termination 
of the RareStone License for cause.  On March 16, 2023, we provided written notice to RareStone (the “March 2023 
Notice”) reaffirming our position that RareStone has materially breached its obligations under the RareStone License and 
that we have terminated the RareStone License for cause, and also requested documentation supporting RareStone’s 
purported dispute notice objecting to the claims in the October 2022 Notice. On May 10, 2023, RareStone provided us 
written notice reaffirming its objections to the claims in our October 2022 Notice and March, 2023 Notice, including our 
termination of the RareStone License for cause. On November 29, 2023, RareStone wrote to us seeking to negotiate and 
execute a commercial supply agreement as contemplated under the Exclusive License Agreement, and on January 19, 
2024, we responded in writing again reaffirming our position that RareStone has materially breached its obligations under 
the RareStone License and that we have terminated the RareStone License for cause.  Since our last written response in 
January 2024, we have engaged in discussions with RareStone in an effort to reach a resolution, however, we cannot 
predict whether a resolution will ever be reached. 
There can be no assurance that we will be able to negotiate an appropriate cure to the alleged material breaches, 
which we believe are incurable, and, if required, we expect to seek appropriate relief under the terms of the RareStone 
License. Termination of, or any possible litigation focused on, the RareStone License could cause significant delays in our 
product development and commercialization efforts for setmelanotide and could prevent us from commercializing 
IMCIVREE in the markets covered by the RareStone License without first expanding our internal capabilities or entering 
into another agreement with a third party. Any alternative collaboration or license could also be on less favorable terms to 
us. In addition, under the agreement, RareStone agreed to provide funding for certain clinical development activities. To 
date, no such funding has been provided. If the agreement were terminated, however, we may need to refund any such 
potential payments and seek additional funding to support the research and development of setmelanotide or discontinue 
any research and development activities for setmelanotide in China, including mainland China, Hong Kong and Macao, 
which could have a material adverse effect on our business. 
Risks Related to Our Intellectual Property Rights 
If we are unable to adequately protect our proprietary technology or maintain issued patents directed to setmelanotide, 
RM-718, and bivamelagon, others could compete against us sooner, which could 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 
adequately protect our intellectual property and proprietary technology, competitors may be able to use our technologies 

83 
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, RM-718, and 
bivamelagon. In addition, our CHI program intellectual property may not have the scientific value and commercial 
potential which we envision. 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 positions. The patent positions of biotechnology and pharmaceutical companies, including our patent 
positions, 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, RM-718, or bivamelagon. 
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 may 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, RM-718, or bivamelagon 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, RM-718, or bivamelagon, 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, RM-718, or bivamelagon; 
• 
any of our pending patent applications will issue as patents; 
• 
we will be able to successfully commercialize IMCIVREE or our other product candidates 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; 

84 
• 
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 positions, 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. 

85 
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 or our other product 
candidates. 
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 
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, RM-718, or bivamelagon 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 or our other product candidates. 
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 of setmelanotide and commercialization of IMCIVREE or our other product candidates; 
• 
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 inventorship 
or 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. 

86 
Issued patents covering setmelanotide or our other product candidates 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 or one of our other product candidates, the defendant could claim that the patent covering 
setmelanotide or the other product candidates are 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 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, our other product candidates, 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 or our other product candidates. 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 and our other product candidates 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 2024 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 or bivamelagon. 
We have licensed our rights to setmelanotide from Ipsen, and our rights to bivamelagon from LGC. Our licenses 
with Ipsen and LGC impose various obligations on us, and provide Ipsen and LGC the right to terminate the license in the 

87 
event of our material breach of the license agreement, our failure to initiate or complete certain development of a licensed 
product, or our commencement of an action seeking to have an Ipsen or LGC licensed patent right declared invalid. 
Termination of our license from Ipsen or LGC 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 and bivamelagon, 
respectively, as well as harm our competitive business position and our business prospects. Furthermore, if our license 
agreement with LGC were terminated, we may be subject to certain refunds or be subject to certain payments to LGC. 
We also have licensed from Camurus its drug delivery technology, FluidCrystal®, to formulate once-weekly 
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. 
We may enter into additional license agreements 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. 
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 or bivamelagon, as well as harm our 
competitive business position and our business prospects. 
While we have registered trademarks for the commercial trade name IMCIVREE (setmelanotide) in the United States, 
the European Union, and other jurisdictions, we have not yet obtained trademark protection for IMCIVREE in certain 
foreign jurisdictions and failure to secure such registrations could adversely affect our business. 
While we have received registered trademarks for the commercial trade name IMCIVREE (setmelanotide) and 
its logo in the United States, the EU, and other countries, we have not yet 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. 
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 and our other product candidates, our 
business may be materially harmed. 
Depending upon the timing, duration and specifics of FDA marketing approval for setmelanotide and our other 
product candidates, one or more of the U.S. patents we own or 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. We have received patent term 
extension for IMCIVREE and will apply for patent term extension for our other product candidates at the appropriate time, 
however, we may not be granted an extension for these other product candidates 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. 

88 
Because setmelanotide contains active ingredients that the FDA has determined to be a new chemical entity, it 
has been afforded five years of non-patent data exclusivity by the FDA. Following the expiration of this exclusivity period, 
the FDA may approve generic products referencing the information included in our NDA for setmelanotide. 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. 
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 
products. 
The United States enacted the America Invents Act of 2011, wide is a 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 
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 or our other product candidates, 
which would materially adversely affect our commercial development efforts. 
Risks Related to Regulatory Approval and Marketing of Setmelanotide and Other Legal and 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 our 
product candidates. If we are not able to obtain, or if there are delays in obtaining, required regulatory approvals for 
our product candidates, we will not be able to commercialize such candidates and our ability to generate revenue will 
be materially impaired. 
Our business depends largely on its successful clinical development, regulatory approval and commercialization 
of our product candidates.  In the United States, IMCIVREE is approved to reduce excess body weight and maintain weight 
reduction long term in adults and pediatric patients 2 years of age and older with syndromic or monogenic obesity due to 
BBS or POMC, PCSK1 or LEPR deficiency as determined by a FDA-approved test demonstrating variants in POMC, 
PCSK1 or LEPR genes that are interpreted as pathogenic, likely pathogenic, or of uncertain significance.  Health Canada 
has approved IMCIVREE for weight management in adult and pediatric patients 6 years of age and older with obesity due 
to BBS or genetically-confirmed POMC, PCSK1, or LEPR deficiency due to variants interpreted as pathogenic, likely 
pathogenic, or of VUS. The EC has authorized setmelanotide for the treatment of obesity and the control of hunger 

89 
associated with genetically confirmed BBS or genetically confirmed loss-of-function biallelic POMC, including PCSK1, 
deficiency or biallelic LEPR deficiency in adults and children 2 years of age and above. The UK’s MHRA authorized 
setmelanotide for the treatment of obesity and the control of hunger associated with genetically confirmed BBS or 
genetically confirmed loss-of-function biallelic POMC, including PCSK1, deficiency or biallelic LEPR deficiency in 
adults and children 2 years of age and above. Setmelanotide 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 EU and the United Kingdom, and our other product candidates will 
require similar efforts before we are permitted to commercialize them for any indication. The clinical trials, manufacturing 
and marketing of our product candidates 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 such 
product candidates. 
Before obtaining regulatory approvals for the commercial sale of any product candidate, we must demonstrate 
through nonclinical 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 postmarketing 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 or 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 or EC approval 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 our product 
candidates 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 our product candidates are safe and effective for their intended uses; 
• 
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 or the applicable foreign 
regulatory agency may identify deficiencies in our chemistry, manufacturing or controls of our product 
candidates, or in the commercial production of such product candidates that may be required to support 
product approval; 

90 
• 
the CROs that we retain to conduct our clinical trials may take actions outside of our control that materially 
adversely impact our clinical trials; 
• 
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 a product 
candidate 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 or other equivalent competent authorities in foreign jurisdictions may not approve the formulation, 
labeling or specifications of our product candidates; 
• 
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; 
• 
we may not be able to meet any post-market requirements or commitments agreed to in connection with 
regulatory approvals 
• 
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 our product candidate; 
• 
the EC may grant only conditional marketing authorization or based on the EMA’s opinion 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 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, or to successfully market IMCIVREE. Moreover, because our business is largely dependent upon 
setmelanotide, any such setback in our pursuit of regulatory approvals would have a material adverse effect on our business 
and prospects. 
Future regulatory legislation or regulation may increase the difficulty and cost for us to obtain marketing approval of 
and commercialize our product candidates. 
The EU pharmaceutical legislation is currently undergoing a complete review process, in the context of the 
Pharmaceutical Strategy for Europe initiative, launched by the EC in November 2020. The EC’s proposal for a revision of 
several legislative instruments related to medicinal products (potentially reducing the duration of regulatory data 
protection, revising the eligibility for expedited pathways, etc.) was published on April 26, 2023. The proposed revisions 
remain to be agreed and adopted by the European Parliament and European Council and the proposals may therefore be 
 

91 
substantially revised before adoption, which is not anticipated before early 2026. The revisions, may, however, have a 
significant impact on the pharmaceutical industry and our business in the long term. 
In the United States, the FDA oversees the rare pediatric disease priority review voucher program (the “PRV 
Program”), which aims to incentive drug development for rare pediatric diseases.  Under the PRV Program, a company 
sponsor that receives a drug approval may qualify for a voucher that can be redeemed to receive priority review for a 
different product and these vouchers can be transferred or sold.  Under the current provisions in the law enacting the PRV 
Program, the PRV Program began to sunset after December 20, 2024.  These changes to the PRV Program could impact 
existing and future development programs and could negatively impact our business. 
Disruptions at the FDA, including those caused by changing presidential administrations and related priorities, 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 and foreign regulatory authorities to review and or approve new products can be affected 
by a variety of factors, including reductions in force or hiring freezes, government budget and funding levels, statutory, 
regulatory, and policy changes, the FDA’s and foreign regulatory authorities’ ability to hire and retain key personnel and 
accept the payment of user fees, and other events that may otherwise affect the FDA’s and foreign regulatory authorities’ 
ability to perform routine functions, including uncertainty associated with the new presidential administration in the United 
States. Average review times at the FDA and foreign regulatory authorities have fluctuated in recent years as a result of 
some of these factors and could also fluctuate in the future. 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, the 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 the COVID-19 pandemic, the FDA postponed most inspections of domestic and foreign 
manufacturing facilities at various points. If a prolonged government shutdown occurs, or if global health concerns or any 
other disruptions 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 or our other product 
candidates from being marketed abroad, and any current or future approvals we have been or may be granted for 
setmelanotide or other products in the United States would not assure approval of setmelanotide or other products 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 UK’s withdrawal from the EU, commonly referred to as Brexit, has resulted 
in the relocation of the EMA from the UK 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 MHRA, including delays in granting 

92 
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, or any other product candidates 
in the EU and/or the UK. Although we have obtained FDA approval and marketing authorization from the EC and the 
MHRA for setmelanotide, any delay in obtaining, or an inability to obtain, any marketing authorization, for any of our 
other product candidates, as a result of Brexit or otherwise, would prevent us from commercializing our product candidates 
in the UK 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 UK and/or EU for any 
of our other product candidates, which could significantly and materially harm our business. 
The terms of our current and future potential marketing approvals for setmelanotide and other product candidates and 
ongoing regulation may limit how we manufacture and market setmelanotide and other products, 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, and the same may be true for our other product 
candidates, if approved. We and setmelanotide will also be subject to ongoing requirements by the FDA and foreign 
regulatory authorities, governing labeling, packaging, storage, advertising, promotion, marketing, distribution, 
importation, exportation, post-approval changes, manufacturing, recordkeeping, and submission of safety and other post 
market information. Advertising and promotional materials must comply with the FDCA and implementing regulations 
and foreign regulations and are subject to FDA and foreign regulatory authorities 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 and foreign regulatory authorities also has the authority to require, as part of an NDA or similar 
foreign application or post approval, the submission of a REMS or other specific obligations, which may include Elements 
to Assure Safe Use. Any REMS or other specific obligations required by the FDA or foreign regulatory authorities 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. Similar requirements apply 
in foreign jurisdictions. 
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; 

93 
• 
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. 
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 GMP 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 GMP. 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. Noncompliance with such obligations can lead 
to the variation, suspension or withdrawal of marketing authorization or imposition of financial penalties or other 
enforcement measures. 

94 
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, particularly under 
the new presidential administration, 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 and elsewhere, the 
pharmaceutical industry has been a particular focus of these efforts and has been significantly affected by major legislative 
and regulatory initiatives. We expect that current laws, as well as other healthcare reform measures that may be adopted 
in the future, including executive orders, 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.  
New and changing laws and regulations may also create uncertainty about how such laws and regulations will be 
interpreted and applied. If the Company is found to have violated laws and regulations, it could materially adversely affect 
the Company’s business, results of operations and financial condition. 
The Patient Protection and Affordable Care Act (ACA) was signed into law in 2010. 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; 
• 
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,” such as IMCIVREE, 
from the 340B ceiling price requirements for these covered entities; 
• 
a 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. 
Since its enactment, certain provisions of the ACA have been subject to judicial, executive, and legislative 
challenges and may be subject to additional challenges in the future. 

95 
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. 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. 
Most significantly, in August 2022, President Biden signed the Inflation Reduction Act of 2022 (IRA) into law.  
This statute marks the most significant action by Congress with respect to the pharmaceutical industry since adoption of 
the ACA in 2010.  Among other things, the IRA requires manufacturers of certain drugs to engage in price negotiations 
with Medicare, with prices that can be negotiated subject to a cap; imposes rebates under Medicare Part B and Medicare 
Part D to penalize price increases that outpace inflation (first due in 2023); redesigns the Medicare Part D benefit 
(beginning in 2024);  and replaces the Part D coverage gap discount program with a new manufacturer discount program 
(beginning in 2025).  CMS has published the negotiated prices for the initial ten drugs, which will first be effective in 
2026, and has published the list of the subsequent 15 drugs that will be subject to negotiation.  The IRA permits the 
Secretary of the Department of Health and Human Services (HHS) to implement many of these provisions through 
guidance, as opposed to regulation, for the initial years. HHS has and will continue to issue and update guidance as these 
programs are implemented, although the Medicare drug price negotiation program is currently subject to legal challenges. 
The impact of the IRA on us and the pharmaceutical industry cannot yet be fully determined, but is likely to be significant. 
Under the IRA manufacturer discount program that replaced the coverage gap discount program as of January 1, 
2025, manufacturers must give a 10 percent discount on Part D drugs in the initial coverage phase, and a 20 percent 
discount on Part D drugs in the so-called “catastrophic phase” (the phase after the patient incurs costs above the initial 
phase out-of-pocket threshold, which is $2,000 beginning in 2025). The IRA allows the 10 and 20 percent discounts to be 
phased in over time for certain drugs for “specified manufacturers.” In April 2024, CMS informed us that we are deemed 
a specified manufacturer. We are still evaluating the potential impact of this status on our future revenues. 
IMCIVREE is not currently reimbursed under Medicare Part D, but if we were to be reimbursed under Medicare 
Part D in the future, the reimbursement amount will be impacted by the 10 and 20 percent discounts under the IRA’s new 
discounting program.  We anticipate that these increased discounts could impact IMCIVREE revenues, while also having 
an industry-wide impact on the cost of Part D drugs. The impact on IMCIVREE revenues could be offset because the 
IRA’s redesign of certain Part D components, some of which went into effect in 2024, resulted in an increase in the number 
of patients able to afford this therapy.  The amount of the offset, if any, is inherently uncertain and difficult to predict. 
The IRA manufacturer discounting program also increases financial obligations of Part D prescription drug plans 
with respect to beneficiaries in the catastrophic coverage phase. This may incentivize Part D prescription drug plans to 
seek greater price concessions from us in order to include IMCIVREE on their formularies. 
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, drug price increase 
reporting, and other transparency measures. Some states have enacted legislation creating so-called prescription drug 
affordability boards, which ultimately may attempt to impose price limits on certain drugs in these states. These types of 
initiatives may result in additional reductions in Medicare, Medicaid, and other healthcare funding, and may otherwise 
affect the prices we may obtain for IMCIVREE or the frequency with which IMCIVREE is prescribed or used. 
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 product 

96 
candidates or additional pricing pressures.  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. 
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 IMCIVREE 
and any other product candidates for which we obtain approval 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 IMCIVREE 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” in this 
Annual Report. 
If we fail to comply with our reporting and payment obligations under the Medicaid Drug Rebate Program or other 
governmental pricing programs in which we participate, 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. 
Medicaid is a joint federal and state program administered by the states for low income and disabled beneficiaries. 
We participate in and have certain price reporting obligations under the Medicaid Drug Rebate Program, or the MDRP, as 
a condition of having covered outpatient drugs payable under Medicaid and, if applicable, under Medicare Part B. The 
MDRP requires us to pay a rebate to state Medicaid programs every quarter for each unit of our covered outpatient drugs 
dispensed to Medicaid beneficiaries and paid for by a state Medicaid program. The rebate is based on pricing data that we 
must report on a monthly and quarterly basis to the Centers for Medicare & Medicaid Services, or CMS, the federal agency 
that administers the MDRP and other governmental healthcare programs. These data include the average manufacturer 
price (AMP) for each drug and, in the case of innovator products, the best price, which in general represents the lowest 
price available from the manufacturer to certain entities in the United States in any pricing structure, calculated to include 
all sales and associated rebates, discounts and other price concessions.  The Medicaid rebate consists of two components, 
the basic rebate and the additional rebate, which is triggered if the AMP for a drug increases faster than inflation. If we 
become aware that our MDRP government price reporting submission for a prior quarter was incorrect or has changed as 
a result of recalculation of the pricing data, we must resubmit the corrected data for up to three years after those data 
originally were due. If we fail to provide information timely or are found to have knowingly submitted false information 
to the government, we may be subject to civil monetary penalties and other sanctions, including termination from the 
MDRP. In the event that CMS terminates our rebate agreement pursuant to which we participate in the MDRP, no federal 
payments would be available under Medicaid or Medicare Part B for our covered outpatient drugs. Our failure to comply 
with our MDRP price reporting and rebate payment obligations could negatively impact our financial results. 
The recently-enacted IRA imposes rebates under Medicare Part B and Medicare Part D that are triggered by price 
increases that outpace inflation (first due in 2023), 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.  The Medicare Part D rebate will be calculated on 
the basis of the AMP figures we report pursuant to the MDRP. 
Federal law requires that any company that participates in the MDRP also participate in the Public Health 
Service’s 340B drug pricing program in order for federal funds to be available for the manufacturer’s drugs under Medicaid 
and, if applicable, Medicare Part B. We participate in the 340B program, which is administered by the Health Resources 
and Services Administration, or HRSA, and requires us to charge statutorily defined covered entities no more than the 
340B “ceiling price” for our covered outpatient drugs. These 340B covered entities include a variety of community health 

97 
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,” such as IMCIVREE, from the ceiling price requirements for these covered entities. The 340B ceiling price 
is calculated using a statutory formula based on the AMP and rebate amount for the covered outpatient drug as calculated 
under the MDRP, and in general, products subject to Medicaid price reporting and rebate liability are also subject to the 
340B ceiling price calculation and discount requirement. We must report 340B ceiling prices to HRSA on a quarterly 
basis, and HRSA publishes those prices to 340B covered entities. In addition, HRSA has finalized regulations regarding 
the calculation of the 340B ceiling price and the imposition of civil monetary penalties on manufacturers that knowingly 
and intentionally overcharge covered entities for 340B-eligible drugs. HRSA has also finalized a revised regulation 
implementing an administrative dispute resolution process through which 340B covered entities may pursue claims against 
participating manufacturers for overcharges, and through which manufacturers may pursue claims against 340B covered 
entities for engaging in unlawful diversion or duplicate discounting of 340B drugs. Our failure to comply 340B program 
requirements could negatively impact our financial results. Any additional future changes to the definition of average 
manufacturer price and the Medicaid rebate amount under legislation or regulation could affect our 340B ceiling price 
calculations and also negatively impact our financial results. 
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 participate in the 
U.S. Department of Veterans Affairs, or VA, Federal Supply Schedule, or FSS, pricing program. As part of this program, 
we are required 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 must 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. 
We also participate in the Tricare Retail Pharmacy program, under which we are 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 are 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 are 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. 
Individual states continue to consider and have enacted legislation to limit the growth of healthcare costs, 
including the cost of prescription drugs and combination products. A number of states have either implemented or are 
considering implementation of drug price transparency legislation. Requirements of pharmaceutical manufacturers under 
such laws include advance notice of planned price increases, reporting price increase amounts and factors considered in 
taking such increases, wholesale acquisition cost information disclosure to prescribers, purchasers, and state agencies, and 
new product notice and reporting. Such legislation could limit the price or payment for certain drugs, and a number of 
states are authorized to impose civil monetary penalties or pursue other enforcement mechanisms against manufacturers 
who fail to comply with drug price transparency requirements, including the untimely, inaccurate, or incomplete reporting 
of drug pricing information. 
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. CMS, the Department of Health & 
Human Services Office of Inspector General, and other governmental agencies have pursued manufacturers that were 
alleged to have failed to report these data to the government in a timely or accurate manner. Governmental agencies may 
also make changes in program interpretations, requirements or conditions of participation, some of which may have 

98 
implications for amounts previously estimated or paid. We cannot assure you that any submissions we are required to 
make under the MDRP, the 340B program, the VA/FSS program, the Tricare Retail Pharmacy Program, and other 
governmental drug pricing programs will not be found to be incomplete or incorrect. 
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 the reduction of excess body 
weight and maintenance of weight reduction long term in adult and pediatric patients 2 years of age and older with 
monogenic or syndromic obesity due to BBS or POMC, PCSK1, or LEPR, deficiency confirmed by FDA-approved test 
demonstrating variants in POMC, PCSK1, or LEPR genes that are interpreted as pathogenic, likely pathogenic, or of 
uncertain significance.  
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 setmelanotide, the active 
ingredient in 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. 
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. 

99 
We may be subject to federal, state and foreign healthcare laws and regulations, including fraud and abuse laws, health 
information privacy and security laws, and antitrust laws. 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, and other product candidates,  if approved. Our arrangements and interactions with healthcare professionals, 
third-party payors, patients and others will expose us to broadly applicable fraud and abuse, antikickback, 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, state and foreign 
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. 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. 
• 
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 

100 
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. 
• 
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 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), 
certain non-physician practitioners (physician assistants, nurse practitioners, clinical nurse specialists, 
certified nurse anesthetists, anesthesiology assistants and certified nurse-midwives) and teaching 
hospitals, as well as ownership and investment interests held by physicians and their immediate family 
members. 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. 
• 
Analogous foreign laws and regulations, including restrictions imposed on the promotion and marketing 
of medicinal products in the EU member states and other countries, 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 

101 
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, federal and foreign 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. 
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 antitrust, 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, whether knowingly or unknowingly, 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 or unintentional failures to comply with the regulations of the FDA and applicable non U.S. regulators, provide 
accurate 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. 
Actual or perceived failure to comply with data protection, privacy and security laws and regulations could lead to 
government enforcement actions and significant penalties against us, and adversely impact our operating results. 
The global data protection landscape is rapidly evolving, and we are or may become subject to numerous state, 
federal and foreign laws, requirements and regulations governing the collection, use, disclosure, retention, and security of 
personal information. Implementation standards and enforcement practices are likely to remain uncertain for the 
foreseeable future, and we cannot yet determine the impact future laws, regulations, standards, or perception of their 
requirements may have on our business. This evolution may create uncertainty in our business, affect our ability to operate 
in certain jurisdictions or to collect, store, transfer use and share personal information, necessitate the acceptance of more 

102 
onerous obligations in our contracts, result in liability or impose additional costs on us. The cost of compliance with these 
laws, regulations and standards is high and is likely to increase in the future. Any failure or perceived failure by us to 
comply with federal, state or foreign laws or regulations, our internal policies and procedures or our contracts governing 
our processing of personal information could result in negative publicity, government investigations and enforcement 
actions, claims by third parties and damage to our reputation, any of which could have a material adverse effect on our 
financial performance, business and operating results. 
In the United States, numerous federal and state laws and regulations, including HIPAA, as amended by the 
Health Information Technology for Economic and Clinical Health Act of 2009 and regulations implemented thereunder, 
collectively HIPAA, state data breach notification laws, state health information privacy laws and federal and state 
consumer protection laws, including Section 5 of the Federal Trade Commission Act, which govern the collection, use, 
disclosure and protection of health-related and other personal information, may apply to our operations and the operations 
of current and future collaborators. 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. Further, we may also be subject 
to other state laws governing the privacy, processing and protection of personal information. For example, the California 
Consumer Privacy Act as amended by the California Privacy Rights Act, collectively, the CCPA, requires covered 
businesses that process the personal information of California residents to, among other things: (i) provide certain 
disclosures to California residents regarding the business’s collection, use, and disclosure of their personal information; 
(ii) receive and respond to requests from California residents to access, delete, and correct their personal information, or 
to opt out of certain disclosures of their personal information; and (iii) enter into specific contractual provisions with 
service providers that process California resident personal information on the business’s behalf. Additional compliance 
investment and potential business process changes may also be required. Similar laws have passed in other states, and are 
continuing to be proposed at the state and federal level, reflecting a trend toward more stringent privacy legislation in the 
United States. The enactment of such laws could have potentially conflicting requirements that would make compliance 
challenging. In addition, 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. In the event that we are subject to 
or affected by HIPAA, the CCPA, or other domestic privacy and data protection laws, any liability from failure to comply 
with the requirements of these laws could adversely affect our financial condition. 
Furthermore, the Federal Trade Commission, or FTC, and many state Attorneys General continue to enforce 
federal and state consumer protection laws against companies for online collection, use, dissemination and security 
practices that appear to be unfair or deceptive. For example, according to the FTC, failing to take appropriate steps to keep 
consumers’ personal information secure can constitute unfair acts or practices in or affecting commerce in violation of 
Section 5(a) of the Federal Trade Commission Act. The FTC expects a company’s data security measures to be reasonable 
and appropriate in light of the sensitivity and volume of consumer information it holds, the size and complexity of its 
business, and the cost of available tools to improve security and reduce vulnerabilities. 
Our operations abroad may also be subject to increased scrutiny or attention from data protection authorities. For 
example, in Europe, the collection and use of personal data, including health and genetic data, is governed by the provisions 
of the GDPR. The GDPR became effective on May 25, 2018, and imposes strict requirements for the processing of the 
personal data of individuals within the European Economic Area, or EEA, or in the context of our activities in the EEA, 
including health data from clinical trials and AE reporting. In particular, these requirements include certain obligations 
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 EEA, security breach notifications, and security and confidentiality of the personal 
data, and violations of these requirements could result in substantial fines, 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 

103 
as associated costs, diversion of internal resources, and reputational harm. Data protection authorities from the different 
EU and EEA member states may also interpret the GDPR and national laws differently and impose additional 
requirements, which adds to the complexity of processing personal data in the EU and the EEA. 
Additionally, from January 1, 2021, we have had to comply with the GDPR and also the United Kingdom GDPR, 
or UK GDPR, which, together with the amended United Kingdom Data Protection Act 2018, retains the GDPR in United 
Kingdom national law following Brexit. The UK 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. 
Among other requirements, the GDPR and UK GDPR also regulate transfers of personal data subject to the GDPR 
or UK GDPR to third countries that have not been found to provide adequate protection to such personal data, including 
the United States. Case law from the Court of Justice of the European Union, or the CJEU, states that reliance on the 
standard contractual clauses - a standard form of contract approved by the EC as an adequate personal data transfer 
mechanism - alone may not necessarily be sufficient in all circumstances and that transfers must be assessed on a case-by-
case basis. On July 10, 2023, the European Commission adopted its Adequacy Decision in relation to the new EU-US Data 
Privacy Framework, or the DPF, rendering the DPF effective as a GDPR transfer mechanism to U.S. entities self-certified 
under the DPF. On October 12, 2023, the UK Extension to the DPF came into effect (as approved by the UK Government), 
as a data transfer mechanism from the UK to U.S. entities self-certified under DPF.  Following a period of legal complexity 
and uncertainty regarding international personal data transfers, particularly to the United States, we expect the regulatory 
guidance and enforcement landscape to continue to develop, in relation to transfers to the United States and elsewhere. In 
particular, we expect the DPF Adequacy Decision to be challenged and international transfers to the United States and to 
other jurisdictions more generally to continue to be subject to enhanced scrutiny by regulators. As a result, we may have 
to make certain operational changes and implement revised standard contractual clauses and other relevant documentation 
for existing data transfers arrangements within required time frames. 
Although we work to comply with applicable laws, regulations and standards, our contractual obligations and 
other legal obligations, these requirements are evolving and may be modified, interpreted and applied in an inconsistent 
manner from one jurisdiction to another, and may conflict with one another or other legal obligations with which we must 
comply. Our failure to comply with our obligations under the GDPR or UK 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, the UK GDPR, and other countries’ privacy or data security-related laws could adversely impact our 
ability to use the data generated in our studies. And any actual or perceived failure to comply with these data protection 
laws or adequately address privacy and security concerns could lead to government enforcement actions and significant 
penalties against us, and adversely impact our operating results. 
In addition, we may use artificial intelligence, or AI, machine learning, and automated decision-making 
technologies, collectively, AI Technologies, in our business. The regulatory framework for AI Technologies is rapidly 
evolving as many federal, state, and foreign government bodies and agencies have introduced or are currently considering 
additional laws and regulations. Additionally, existing laws and regulations may be interpreted in ways that would affect 
the operation of AI Technologies. As a result, implementation standards and enforcement practices are likely to remain 
uncertain for the foreseeable future, and we cannot yet determine the impact future laws, regulations, standards, or market 
perception of their requirements may have on our business and may not always be able to anticipate how to respond to 
these laws or regulations.    
It is possible that new laws and regulations will be adopted in the United States and in other non-U.S. jurisdictions, 
or that existing laws and regulations, including competition and antitrust laws, may be interpreted in ways that would limit 
our ability to use AI Technologies for our business, or require us to change the way we use AI Technologies in a manner 
that negatively affects the performance of our products, services, and business and the way in which we use AI 
Technologies. We may need to expend resources to adjust our products or services in certain jurisdictions if the laws, 
regulations, or decisions are not consistent across jurisdictions. Further, the cost to comply with such laws, regulations, or 
decisions and/or guidance interpreting existing laws, could be significant and would increase our operating expenses (such 
as by imposing additional reporting obligations regarding our use of AI Technologies). Such an increase in operating 
expenses, as well as any actual or perceived failure to comply with such laws and regulations, could adversely affect our 
business, financial condition and results of operations. 

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Our future growth depends, in part, on our ability to continue 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 continue to commercialize setmelanotide and our 
other product candidates in foreign markets for which we intend to rely on collaborations with third parties. As we continue 
to 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; 
• 
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 or our other product candidates outside of the United States and 
require us to develop and implement costly compliance programs. 
If we continue to 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. 

105 
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. 
The results of the United Kingdom’s departure 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 UK, the UK formally 
withdrew from the EU on January 31, 2020. 
Since the end of the Brexit transition period on January 1, 2021, Great Britain (England, Scotland and Wales) has 
not been directly subject to EU law and has operated under a separate regulatory regime to the EU. It is currently unclear 
to what extent the UK Government will seek to align its regulations with the EU. EU law which has been transposed into 
UK law through secondary legislation still remains applicable in Great Britain, however, new EU legislation such as the 
CTR is not applicable in Great Britain post-Brexit. While the UK has indicated a general intention that new laws regarding 
the development, manufacture and commercialization of medicinal products in the UK will align closely with EU law, 
there remain limited detailed proposals for the future regulation of medicinal products. 
Under the terms of the Ireland/Northern Ireland Protocol, EU law still generally applies to Northern Ireland. 
However, on February 27, 2023, the UK Government and the EC reached a political agreement in the “Windsor 
Framework” to address discrepancies in the Protocol’s operation. This new framework fundamentally changes the existing 
system under the Northern Ireland Protocol, including with respect to the regulation of medicinal products in the UK. In 
particular, the MHRA will be responsible for approving all medicinal products destined for the UK market (i.e., Great 
Britain and Northern Ireland), and the EMA will no longer have any role in approving medicinal products destined for 
Northern Ireland. A single UK-wide MA will be granted by the MHRA for all medicinal products to be sold in the UK, 
enabling products to be sold in a single pack and under a single authorization throughout the UK. The Windsor Framework 
was approved by the EU-UK Joint Committee on March 24, 2023, so the UK government and the EU will enact legislative 
measures to bring it into law. On June 9, 2023, the MHRA announced that the medicines aspects of the Windsor 
Framework will apply from January 1, 2025. 
Whilst the EU-UK Trade and Cooperation Agreement (TCA) includes the mutual recognition of GMP inspections 
of manufacturing facilities for medicinal products and GMP documents issued, it does not contain wholesale mutual 
recognition of UK and EU pharmaceutical regulations and product standards. There may be divergent local requirements 
in Great Britain from the EU in the future, which may impact clinical and development activities that occur in the UK. 
Similarly, clinical trial submissions in the UK will not be able to be bundled with those of EU Member States within the 
EMA Clinical Trial Information System, or CTIS. Any divergences may increase the cost and complexity of running our 
business, including with respect to the conduct of clinical trials. 
Since a significant proportion of the regulatory framework in the UK applicable to our business and our product 
candidates is derived from EU directives and regulations, the withdrawal could continue to impact the regulatory regime 
with respect to the development, manufacture, importation, approval and commercialization of our product candidates in 
the UK. Great Britain is no longer covered by the EU’s procedures for the grant of MA (Northern Ireland is for now 
covered by the centralized authorization procedure and can be covered under the decentralized or mutual recognition 
procedures). A separate MA is required to market medicinal products in Great Britain. Such changes could increase our 
costs and otherwise adversely affect our business. Any delay in obtaining, or an inability to obtain regulatory approvals, 
as a result of Brexit or otherwise, may prevent us from commercializing our product candidates in Great Britain and restrict 

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our ability to generate revenue and achieve or sustain profitability. If any of these outcomes occur, we may be forced to 
restrict or delay efforts to seek regulatory approval in Great Britain for our product candidates, which could significantly 
and materially harm our business. 
Any further changes in relation to international trade, tariff and import/export regulations as a result of Brexit or 
otherwise may impose unexpected duty costs or other non-tariff barriers on us. These developments, or the perception that 
any of them could occur, may reduce global trade and, in particular, trade between the impacted nations and the UK.  
It is unclear what financial, regulatory and legal implications the withdrawal of the UK from the EU will have in 
the long-term and how such withdrawal will affect us, and the full extent to which our business could be adversely affected. 
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, technical, clinical development, regulatory, and sales and marketing personnel will also be 
critical to our success. We may not be able to attract and retain these personnel on acceptable terms given the competition 
among numerous pharmaceutical and biotechnology companies 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.  In addition, we rely on existing employment-related 
visa programs to attract and retain qualified personnel.  Immigration policy changes and uncertainty associated with the 
new presidential administration in the United States, including potential changes to the number of employment-related 
visas available as well as the process to obtain them, could make it more difficult to retain existing personnel and to recruit 
qualified candidates.  If we and our impacted candidates or employees are unable to obtain work visas in sufficient 
quantities or at a sufficient rate for a significant period of time, our business could be adversely affected. 
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 
continue our transition from a research and development focused company to a commercial-stage 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.  We may not be able to successfully recruit the 
personnel we require to operate and expand our business, including our expansion into new countries and markets due to 
a number of factors, including a lack of understanding of local employment practices, cultural barriers, low or no brand 
recognition as a desired employer or place to work, or the perceived risk of joining a company with a limited operating 
history. 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 
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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 and our other product candidates. Many of our suppliers and 
collaborative and clinical trial relationships are located outside the United States, and we have and may continue to hire 
employees located outside of the United States. Accordingly, our business has and may continue to be 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 our approved products and 
compete effectively will depend, in part, on our ability to effectively manage the future development and expansion of our 
Company. 
Our information technology 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 and other product 
candidate development programs, regulatory investigations, enforcement actions and lawsuits. 
In the ordinary course of our business, we produce, collect, process and store sensitive data, including intellectual 
property, our proprietary business information and that of our suppliers, as well as personally identifiable information, 
including of our employees. Similarly, our third-party CROs, CMOs and other contractors and consultants possess certain 
amounts of our sensitive data. We have implemented and maintain an array of physical, administrative and technical 
controls to ensure the confidentiality, integrity and availability of such sensitive information, and the secure maintenance 
of this information is material to our operations and business strategy. Even with the implementation of strong security 
measures, our information technology systems and those of our third-party CROs, CMOs and other contractors and 
consultants are susceptible to attack, damage, or interruption from computer security incidents and cyberattacks such as 
malware (e.g., ransomware), phishing and other social engineering attacks employee or contractor theft, misuse or human 
error, denial or degradation of service attacks, supply chain attacks, advanced persistent threats from nation-state actors  
and unauthorized access or use by persons inside or outside our organization. As a result of our hybrid work environment, 
we also face increased cybersecurity risks due to employees accessing company resources from insecure networks, and 
using personal (i.e., “bring-your-own-device”) or unmanaged devices which often lack enterprise-grade security controls 
and all of which creates additional opportunities for cybercriminals to exploit vulnerabilities and use social engineering 
techniques to carry out a cyberattack. Any such attack, incident or breach could compromise our information technology 
systems which may result in sensitive information being accessed, publicly disclosed, lost, corrupted or stolen. Further, 
cyberattacks are increasing in their frequency, persistence, sophistication and intensity, often conducted by organized and 
well-funded criminal groups with a wide range of motives and expertise. Consequently, our security controls may not 
always prevent a targeted cyberattack, and a threat actor may remain undetected in our systems for an extended period of 
time. There can be no assurance that our cybersecurity risk management program and processes, including our policies, 
controls or procedures, will be fully implemented, complied with or effective in protecting our systems and information. 
We maintain cyber liability insurance; however, it may not be sufficient to cover the financial, legal, business or 
reputational losses that may result from a service interruption or breach of our systems.  
The global healthcare industry is increasingly integrating AI technologies and tools. However, like any emerging 
technology, AI presents its own set of risks, many of which are not yet known or fully understood. For example, AI 
algorithms may have inherent flaws, and data sets could be insufficient, low-quality, or biased. Additionally, inappropriate 
or controversial data practices by data scientists, engineers, and end-users could compromise results of AI processes. If AI 
applications generate flawed or inaccurate analyses or date, it could lead to competitive disadvantages, legal liabilities, 
and harm to our brand or reputation. Furthermore, the use of AI-based software might result in the inadvertent release of 
confidential information.  
 
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 

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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. 
We have put into place safeguards with technology, process and education to mitigate the risks inherent in our 
information technology systems and to defend against cyberattacks and security incidents.  Although we do not believe 
that we have experienced any significant system failure, accident or security breach to date, including any significant or 
material cyberattacks and/or other information technology security incidents, if such an event were to occur and cause 
interruptions in our operations, it could result in a material disruption of our programs and material harm to our business 
and reputation. For example, the breach or 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 or prevented.  It could also expose us to risks, including an inability to provide our services and fulfill contractual 
demands, and could cause management distraction and the obligation to devote significant financial and other resources 
to mitigate such problems, which would increase our future information security costs, including through organizational 
changes, deploying additional personnel, reinforcing administrative, physical and technical safeguards, further training of 
employees, changing third-party vendor control practices and engaging third-party subject matter experts and consultants 
and reduce the demand for our product and services.  
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 5.2% of our outstanding voting stock as of December 31, 2024.  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. 
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 and our other 
product candidates; 
• 
the failure of the FDA or EMA to approve IMCIVREE for additional indications or to initially approve 
our other product candidates; 
• 
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 the rare diseases we intend 
to address; 
• 
regulatory or legal developments in the United States and other countries; 
• 
failure of setmelanotide or our other product candidates, if approved, to achieve commercial success; 

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• 
fluctuations in stock market prices and trading volumes of similar companies; 
• 
general market conditions and overall fluctuations in U.S. equity markets; 
• 
global macroeconomic conditions or instability, including with respect to inflation rates or interest rates, 
curtailment of trade and other business restrictions such as tariffs, boycotts, labor shortages, supply chain 
shortages, disruptions and instability in the banking industry and other parts of the financial services 
sector, outbreak of disease or epidemics, or other economic, political or legal changes, uncertainties or 
adverse developments; 
• 
terrorism and/or political instability, unrest and wars, such as the conflicts involving Ukraine and Russia 
or Israel and Hamas, which could delay or disrupt our business, and if such political unrest escalates or 
spills over to or otherwise impacts additional regions it could heighten many of the other risk factors 
included in this sections; 
• 
natural disasters and other extreme weather events (including as a result of climate change), which could 
cause significant damage to the infrastructure upon which our business operations rely, and the timing, 
nature or severity of which we may be unable to prepare for; 
• 
global political changes and uncertainty, including in the United States with the changes arising from a 
new presidential administration and resulting changes and uncertainty in administrative agencies with 
authority over our business; 
• 
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, which may be significant and difficult to 
anticipate over time. 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; 
• 
any lawsuit, including any intellectual property infringement lawsuit in which we may become involved; 

110 
• 
regulatory developments affecting setmelanotide and our other product candidates; 
• 
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 
• 
the level of underlying demand for setmelanotide and our customers’ buying patterns. 
If our quarterly operating results fall below the expectations of investors or securities analysts for any given 
quarter, 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, 2024, we had approximately $610.2 million and $694.0 million of unused federal and 
state NOL carryforwards, respectively, and approximately $13.8 million and $4.8 million of unused federal and state 
carryforwards of research tax credits, respectively. Of the federal NOL carryforwards at December 31, 2024, 
$537.2 million can be carried forward indefinitely. Additionally, as of December 31, 2024, we had federal orphan drug 
credits related to qualifying research of $34.6 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 limit 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. 
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, 2024, we had 62,390,654 shares of 
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111 
stock outstanding. In addition, on July 10, 2023, we filed with the SEC a prospectus supplement to the prospectus included 
in the Company’s registration statement on Form S-3ASR filed with the SEC on March 2, 2023, covering the resale from 
time to time by the holders of the Convertible Preferred Stock of up to an aggregate of 3,124,995 shares of common stock, 
to satisfy registration rights that the Company granted to such holders in connection with the issuance of the Convertible 
Preferred Stock. To the extent the holders of the Convertible Preferred Stock convert their shares to common stock and 
sell such shares, the price of our common stock could be significantly impacted. 
We may be at an increased risk of securities litigation, including 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 and have an increased risk of securities litigation, 
including class action litigation. 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. 
Additionally, our Convertible Preferred Stock ranks senior to the shares of the Company’s common stock, with respect to 
the payment of dividends and the distribution of assets upon a liquidation, dissolution or winding up of the Company. 
Holders of the Convertible Preferred Stock will be entitled to a regular dividend at a rate as specified in the Amended and 
Restated Certificate of Designations filed by the Company with the Secretary of State of the State of Delaware. 
Therefore, the success of an investment in shares of our common stock will depend upon any future appreciation 
in their value. There is no guarantee that shares of our common stock will appreciate in value or even maintain the price 
at which you purchased them. 
Our common stock is subordinated to our Convertible Preferred Stock. 
In connection with the closing of our Investment Agreement, the Company issued 150,000 shares of a new series 
of the Company’s Convertible Preferred Stock for an aggregate purchase price of $150.0 million, or $1,000 per share. The 
Convertible Preferred Stock ranks senior to the shares of the Company’s common stock, with respect to the payment of 
dividends and the distribution of assets upon a liquidation, dissolution or winding up of the Company. The Convertible 
Preferred Stock has an initial liquidation preference of $1,000 per share; provided that the liquidation preference in 
dissolution or upon a change of control shall be increased to be 175% of the then applicable liquidation preference, as 
described in the Amended and Restated Certificate of Designations. The Convertible Preferred Stock is convertible into 
shares of our common stock at the option of the holders thereof subject to the terms of the Amended and Restated 
Certificate of Designations.  
Additionally, holders of the Convertible Preferred Stock generally will be entitled to vote with the holders of the 
shares of our common stock, subject to certain restrictions pursuant to the terms of the Amended and Restated Certificate 
of Designations, on all matters submitted for a vote of holders of shares of our common stock (voting together with the 
holders of shares of our common stock as one class) on an as-converted basis, subject to certain ownership limitations. On 
May 7, 2024, the Company filed an Amended and Restated Certificate of Designations in respect of the Convertible 
Preferred Stock containing certain technical amendments to the terms of the Convertible Preferred Stock. The amendments 
contained in the Amended and Restated Certificate of Designations (x) limited the voting rights of the Convertible 
Preferred Stock to 24.9438 shares of the Company’s common stock per $1,000 liquidation preference of Convertible 
Preferred Stock and (y) eliminated a 1% step up in the interest rate that otherwise would have applied in the unlikely event 
that the Company was required to obtain and failed to obtain stockholder approval for certain conversion shares underlying 
the Convertible Preferred Stock. Additionally, certain matters will require the approval of the holders of two-thirds of the 
outstanding Convertible Preferred Stock, voting as a separate class, including (1) the authorization, creation, increase in 

112 
the authorized amount of, or issuance of any class or series of senior or pari passu equity securities or any security 
convertible into, or exchangeable or exercisable for, shares of senior or pari passu equity securities, (2) amendments, 
modifications or repeal of any provision of the Company’s charter or of the Amended and Restated Certificate of 
Designations that would adversely affect the rights, preferences or voting powers of the Convertible Preferred Stock, and 
(3) certain business combinations and binding or statutory share exchanges or involving the Convertible Preferred Stock 
unless such events do not adversely affect the rights, preferences or voting powers of the Convertible Preferred Stock. 
In the future, we may make additional offerings of debt or preferred equity securities, including convertible or 
non-convertible senior or subordinated notes, convertible or non-convertible preferred stock, medium-term notes and trust 
preferred securities, to raise cash or bolster our liquidity, to refinance indebtedness, for working capital, to finance strategic 
initiatives and future acquisitions or for other purposes. Upon liquidation, holders of our debt securities and shares of 
preferred stock and lenders with respect to other borrowings may receive distributions of our available assets prior to the 
holders of our common stock. In addition, any preferred stock we may issue could have a preference on liquidating 
distributions or a preference on distribution payments that could limit our ability to make a distribution to the holders of 
our common stock. Since our decision to issue securities in any future offering will depend on market conditions and other 
factors beyond our control, we cannot predict or estimate the amount, timing or nature of our future offerings. Thus, our 
stockholders bear the risk of our future offerings reducing the market price of our common stock. 
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 

113 
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 an alternate preferred 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 
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 have in the past and may in the future 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. For example, in February 2023, in order to 
expand our pipeline and build on our focus on rare endocrinology diseases, we acquired Xinvento B.V., a Netherlands-
based biotech company focused on developing therapies for CHI.  As 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 
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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. From time to time, we may raise additional capital through the 
sale of common stock or securities convertible or exchangeable into common stock, such as our sale of Convertible 
Preferred Stock under the Investment Agreement, which did cause in the case of the Investment Agreement and may cause 
in the future a stockholder’s ownership interest in our Company to 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 rights to setmelanotide, our intellectual property or future revenue streams, or 
grant licenses on terms that are not favorable to us. See above, under the heading “Our common stock is subordinated to 
our Convertible Preferred Stock.” 
Unfavorable global political or 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 political system, 
economy and in the global financial markets. The global economy, including credit and financial markets, has recently 
experienced extreme volatility and disruptions, including severely diminished liquidity and credit availability, rising 
interest and inflation rates, declines in consumer confidence, declines in economic growth, increases in unemployment 
rates, uncertainty about economic stability, and rising political uncertainty. A severe or prolonged economic downturn or 
recession and a continued increase in inflation rates or interest rates 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. There can be no assurance that further deterioration in credit and financial markets and confidence in economic 
conditions will not occur. 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. Increased inflation rates and related 
increases in interest rates can adversely affect us by increasing our costs, including labor and employee benefit costs. In 
addition, geopolitical conflicts and war could disrupt or otherwise adversely impact our operations and those of third 
parties upon which we rely. Related sanctions, export controls or other actions have and may in the future be initiated by 
nations including the United States, the EU or Russia (e.g., potential cyberattacks, disruption of energy flows, etc.), which 
could adversely affect our business and/or our supply chain, our CROs, CMOs and other third parties with which we 
conduct business. The changes arising from a new presidential administration in the United States and the prospect of new 
leadership in key administrative agencies (such as the FDA and SEC) as well as volatile political conditions in other 
countries in which we do business could also create additional uncertainty for our industry and our business, including in 
ways that we cannot foresee.  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. 
Business interruptions could adversely affect our operations. 
Our operations are vulnerable to interruption by fire, severe weather conditions, power loss, telecommunications 
failure, terrorist activity, public health crises and pandemic diseases, and other natural and man-made disasters or events 

115 
beyond our control. Our facilities and employees are located in regions that experience severe weather from time to time. 
We have not undertaken a systematic analysis of the potential consequences to our business and financial results from a 
major tornado, flood, fire, earthquake, power loss, terrorist activity, public health crisis, pandemic diseases or other 
disasters and do not have a recovery plan for such disasters. In addition, we do not carry sufficient insurance to compensate 
us for actual losses from interruption of our business that may occur, and any losses or damages incurred by us could harm 
our business. The occurrence of any of these business disruptions could seriously harm our operations and financial 
condition and increase our costs and expenses. 
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 existing and new compliance initiatives and corporation 
governance policies, and we will need to hire additional qualified accounting, financial, legal and compliance personnel 
with appropriate public company experience. 
As a public 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 and retain additional accounting, financial, legal 
and compliance personnel with appropriate public company experience and technical accounting and securities laws 
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 and commercialization 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. 
We have in the past failed and may in the future fail to maintain an effective system of internal control over financial 
reporting. This may prevent us from accurately reporting our financial results or preventing 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. 
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 and maintain compliance with Section 404, we engage in a process to document 
and evaluate our internal control over financial reporting, which is both costly and challenging. In this regard, we 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 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, from time to time we may not 
be able to conclude that our internal control over financial reporting is effective as required by Section 404, as was the 
case for the year ended December 31, 2023 and quarterly periods in 2024, due to a material weakness identified in internal 
controls related to ineffective information technology general controls in the areas of user access and program change 
management over our key accounting and reporting information technology system. Additionally, the material weakness 
in our internal control over financial reporting resulted in our management being unable to conclude that our disclosure 
controls and procedures were effective for the applicable period. The material weakness has since been remediated; 
however, additional material weaknesses may arise in the future. 

116 
In addition, 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, as it did in our Annual Report on Form 10-K for the year ended 
December 31, 2023. A material weakness could result in a restatement of our financial statements, failure to meet our 
reporting obligations in a timely manner, 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. Ineffective internal control over financial reporting could also reduce our ability to obtain financing or could 
increase the cost of any financing we obtain. Any of these could, in turn, result in an adverse reaction in the financial 
markets due to a loss of confidence in the reliability of our financial statements. 
We have previously identified a material weakness in our internal controls over financial reporting and may identify 
additional material weaknesses in the future or otherwise fail to maintain an effective system of internal controls, which 
may result in material misstatements of our consolidated financial statements or cause us to fail to meet our periodic 
reporting obligations. 
A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, 
such that there is a reasonable possibility that a material misstatement of a company’s annual or interim financial statements 
will not be prevented or detected on a timely basis. We previously identified a material weakness in internal control related 
to ineffective information technology general controls, or ITGCs, in the areas of user access and program change 
management over our key accounting and reporting information technology, or IT, system. As a result, the related business 
process controls (specifically, the IT application controls and IT-dependent manual controls) that are dependent on the 
ineffective ITGCs, or that use data produced from the system impacted by the ineffective ITGCs, were also ineffective. 
Although the material weakness identified above did not result in any material misstatements in our consolidated financial 
statements for the periods presented and there were no changes to previously released financial results, our management 
concluded that these control deficiencies constitute a material weakness and that our internal control over financial 
reporting was not effective as of December 31, 2023. 
Our management designed and implemented new controls and measures to remediate this material weakness, and 
management has concluded that the material weaknesses described above have been remediated. However, we cannot 
assure you that the measures we are taking will be sufficient to avoid the identification of additional material weaknesses 
in the future. Our failure to implement and maintain effective internal control over financial reporting could result in errors 
in our consolidated financial statements that could result in a restatement of our financial statements and could cause us to 
fail to meet our periodic reporting obligations, any of which could diminish investor confidence in us and cause a decline 
in the price of our common stock. 
The increasing focus on environmental sustainability and social initiatives could increase our costs, harm our 
reputation and adversely impact our financial results. 
There has been increasing public focus by investors, customers, environmental activists, the media and 
governmental and nongovernmental organizations on a variety of environmental, social and other sustainability matters. 
We experience pressure to make commitments relating to sustainability matters that affect us, including the design and 
implementation of specific risk mitigation strategic initiatives relating to sustainability. If we are not effective in addressing 
environmental, social and other sustainability matters affecting our business, or setting and meeting relevant sustainability 
goals, our reputation and financial results may suffer. We have undertaken certain initiatives, including disclosures, to 
improve the sustainability profile of our products and/or operations and respond to stakeholder expectations; however, 
such initiatives may be costly and may not have the desired effect. For example, sustainability-related initiatives are often 
based on methodologies, standards, or data that are still evolving and subject to varying interpretations. We cannot 
guarantee that our approach, either now or in future, will align with the expectations of particular stakeholders or that 
certain disclosures will not be considered erroneous or subject to misinterpretation. In addition, this emphasis on 
environmental, social and other sustainability matters has resulted and may result in the adoption of new laws and 
regulations, including new reporting requirements. Such requirements and other expectations are not uniform, and may be 

117 
inconsistently interpreted or applied, which can increase the complexity and cost of compliance. If we fail to comply with 
new laws, regulations or reporting requirements, our reputation and business could be adversely impacted.  Additionally, 
many of our business partners and suppliers may be subject to similar reporting and stakeholder expectations, which may 
augment or create additional risks, including risks that may not be known to us.  Simultaneously, there are efforts by some 
stakeholders to reduce companies’ efforts on certain environmental, social and sustainability-related initiatives. Both 
advocates and opponents of these matters are increasingly resorting to a range of activism forms, including media 
campaigns and litigation, to advance their perspectives. To the extent we are subject to such activism, it may require us to 
incur costs or otherwise adversely impact our business. 
Short sellers of our stock may be manipulative and may drive down the market price of our common stock. 
Short selling is the practice of selling securities that the seller does not own, but rather has borrowed or intends 
to borrow from a third party with the intention of buying identical securities at a later date to return to the lender. A short 
seller hopes to profit from a decline in the value of the securities between the sale of the borrowed securities and the 
purchase of the replacement shares, as the short seller expects to pay less in that purchase than it received in the sale. It is 
therefore in the short seller’s interest for the price of the stock to decline, and some short sellers publish, or arrange for the 
publication of, opinions or characterizations regarding the relevant issuer, often involving misrepresentations of the 
issuer’s business prospects and similar matters calculated to create negative market momentum, which may permit them 
to obtain profits for themselves as a result of selling the stock short. 
As a public entity, we may be the subject of concerted efforts by short sellers to spread negative information in 
order to gain a market advantage. In addition, the publication of misinformation may also result in further lawsuits, the 
uncertainty and expense of which could adversely impact our business, financial condition, and reputation. There are no 
assurances that we will not face further short sellers’ efforts or similar tactics in the future, and the market price of our 
common stock may decline as a result of their actions. 
 
Item 1B. Unresolved Staff Comments 
None. 
 
 
Item 1C. Cybersecurity 
Cybersecurity Risk Management and Strategy 
We have developed and implemented a cybersecurity risk management program intended to protect the 
confidentiality, integrity, and availability of our critical systems and information. 
We design and assess our cybersecurity program based on the NIST Cybersecurity Framework (CSF). This 
framework provides us with a common language and structure for identifying, assessing, and managing cybersecurity risks 
across our organization. We do not claim to comply with the standards or specifications by using this framework. It is a 
guide to help us manage the cybersecurity risks that are relevant to our business. 
Our cybersecurity program is integrated into our overall enterprise risk management program, and shares common 
methodologies, reporting channels and governance processes that apply across the enterprise risk management program to 
other legal, compliance, strategic, operational, and financial risk areas. To this end, we have implemented a cybersecurity 
program that includes the following key elements: 
• 
A Cybersecurity Manager responsible for, among other things, developing and maintaining our 
administrative, technical, and physical cybersecurity controls. 
• 
Risk assessments using the CIS Risk Assessment Method (RAM), which identify material cybersecurity risks 
to our critical systems and information. 

118 
• 
A vulnerability management program that involves the continuous monitoring of information systems for 
vulnerabilities, and a process to effectively remediate those vulnerabilities based on criticality level. 
• 
A comprehensive Disaster Recovery plan to ensure IT personnel and Business owners are prepared for any 
disruption to Rhythm’s business. 
• 
A constantly available Security Operations Center (SOC) to monitor our critical infrastructure and execute 
immediate, human-led responses to confirmed threats.  
• 
External technology and security providers to assess, test or otherwise assist with aspects of our cybersecurity 
program. 
• 
Cybersecurity awareness training for employees, including supplemental training for senior management and 
other personnel who access highly sensitive information. 
• 
A trained incident response team and written procedures to effectively respond to potential computer security 
incidents.  
• 
A third-party risk management process to evaluate the business risk of working with key service providers 
and vendors who access sensitive information. 
We have not identified any cybersecurity incidents that have materially affected our operations, business strategy, 
results of operations, or financial condition. We face risks from cybersecurity threats that, if realized, are reasonably likely 
to materially affect us, including our operations, business strategy, results of operations, or financial condition. For more 
information, see the section titled “Risk Factors— Our information technology 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.” 
Cybersecurity Governance 
Our Board considers cybersecurity risk as part of its risk oversight function and has delegated to the Audit 
Committee (the “Committee”) oversight of cybersecurity risks. The Committee oversees management’s implementation 
of our cybersecurity program.  
The Committee receives periodic reports from management on our cybersecurity program and risks. In addition, 
management updates the Committee, as necessary, regarding any material cybersecurity incidents, as well as any incidents 
with lesser impact potential. The Committee reports to the full Board regarding its activities and risk management 
functions, including those related to cybersecurity. Board members receive presentations on cybersecurity risk and strategy 
from our Senior Cybersecurity Manager, as part of the Board’s continuing education on topics that impact public 
companies. 
The Senior Cybersecurity Manager, with the help of our IT and Legal team is responsible for assessing and 
managing our material risks from cybersecurity threats. This position has the primary responsibility for our overall 
cybersecurity risk management program and supervises both our internal personnel and our retained external cybersecurity 
consultants. The current Senior Cybersecurity Manager has extensive information security and program management 
experience and has held past positions as a virtual CISO for a wide range of organizations. 
Our management team supervises efforts to prevent, detect, mitigate, and remediate cybersecurity risks and 
incidents through various means, which may include briefings from internal security personnel and other information 
obtained from governmental, public, or private sources, including external consultants engaged by us, and alerts and 
reports produced by security tools deployed in the IT environment. 

119 
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 July 2030. This facility houses our research, clinical, 
regulatory, commercial and administrative personnel.  See Note 6 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 we may 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 24, 2025, there were 17 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. 
 
 

121 
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 
December 31, 2017 through December 31, 2024 for (1) our common stock, (2) the Nasdaq Composite Index (U.S.) and 
(3) the Nasdaq Biotechnology Index. Pursuant to applicable SEC 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 
Except as previously disclosed in Current Reports on Form 8-K filed on January 4, 2024 and April 1, 2024, we 
did not make any unregistered sales of equity securities during the period covered by the report.   
Purchases of Equity Securities by the Issuer and Affiliated Purchasers 
None. 
 
Item 6. [Reserved] 
 
 
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations 
You should read the following discussion and analysis of our financial condition and results of operations 
together with our consolidated financial statements and 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 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. 

122 
In this Item 7, we discuss the results of operations for the years ended December 31, 2024 and 2023 and 
comparisons of our cash flows for the year ended December 31, 2024 to the year ended December 31, 2023. Discussion 
and analysis of our 2022 fiscal year, as well as the year-over-year comparison of our 2023 financial performance to 2022, 
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, 2023, filed with the SEC on February 29, 
2024. 
Overview 
We are a global, commercial-stage biopharmaceutical company dedicated to transforming the lives of patients 
living with rare neuroendocrine diseases. We are focused on advancing our melanocortin-4 receptor (MC4R) agonists, 
including our lead asset, IMCIVREE® (setmelanotide), as precision medicines designed to treat hyperphagia and severe 
obesity caused by MC4R pathway diseases. While obesity affects hundreds of millions of people worldwide, we are 
advancing therapies for a subset of individuals who have hyperphagia, a pathological, insatiable hunger and impaired 
satiety accompanied by persistent and abnormal food-seeking behaviors, decreased energy expenditure and severe obesity 
due to diseases such as acquired or congenital hypothalamic obesity, Bardet-Biedl syndrome (BBS) or other diseases 
caused by impaired MC4R pathway signaling. The MC4R pathway is a neuro-endocrine pathway in the brain that is 
responsible for regulating hunger, caloric intake and energy expenditure, which consequently affect body weight. 
IMCIVREE, an MC4R agonist for which we hold worldwide rights, is the first-ever therapy developed for patients with 
certain rare diseases that is approved or authorized in the United States, European Union (EU), United Kingdom, Canada 
and several other countries and regions.  
IMCIVREE is approved by the U.S. Food and Drug Administration (FDA) to reduce excess body weight and 
maintain weight reduction long term in adult and pediatric patients aged 2 years and older with syndromic or monogenic 
obesity due to BBS or proopiomelanocortin (POMC), proprotein convertase subtilisin/kexin type 1 (PCSK1), or leptin 
receptor (LEPR) deficiency as determined by an FDA-approved test demonstrating variants in POMC, PCSK1, or LEPR 
genes that are interpreted as pathogenic, likely pathogenic, or of uncertain significance (VUS). The European Commission 
(EC) and the United Kingdom’s Medicines & Healthcare Products Regulatory Agency (MHRA) have authorized 
IMCIVREE for the treatment of obesity and the control of hunger associated with genetically confirmed BBS or loss-of-
function biallelic POMC, including PCSK1, deficiency or biallelic LEPR deficiency in adults and children 2 years of age 
and above. In addition to the United States, we have achieved market access or named patient sales for IMCIVREE for 
BBS or POMC and LEPR deficiencies, or both, in 15 countries outside the United States, and we continue to collaborate 
with authorities to achieve access in additional markets.  
With our efforts in hypothalamic obesity and other potential indications, we are advancing what we believe is the 
most comprehensive clinical research and development program ever initiated in MC4R pathway diseases, with multiple 
ongoing and planned clinical trials. Our MC4R pathway program is designed to expand the total number of patients who 
we believe could benefit from setmelanotide therapy or from one of our new drug candidates.  Our Phase 3 EMANATE 
trial, comprised of four independent substudies evaluating setmelanotide in genetically caused MC4R pathway diseases is 
ongoing.  Following the completion of our Phase 2 DAYBREAK trial, we identified six genetically-defined cohorts that 
we believe merit further investigation for potential setmelanotide efficacy. We also are evaluating setmelanotide for the 
treatment of Prader-Willi syndrome (PWS) in a 26-week, open-label Phase 2 trial which was initiated at a single site in 
the United States during the first quarter of 2025.  
In addition to setmelanotide, we have two earlier-stage investigational MC4R agonists in clinical development, 
RM-718, designed for weekly administration, and bivamelagon, an oral small molecule, which are each advancing in 
Phase 1 and 2 clinical trials, respectively. These investigational assets are designed to be highly selective for the MC4R 
and MC1R sparing and thereby not cause hyperpigmentation. We completed enrollment in our Phase 2 trial evaluating 
bivamelagon, in acquired hypothalamic obesity in the first quarter of 2025. With RM-718, we anticipate initiating Part C 
of our Phase 1 trial to evaluate this weekly MC4R agonist in patients with acquired hypothalamic obesity in the first quarter 
of 2025. 
We are leveraging what we believe is the largest known DNA database focused on obesity - with approximately 
100,000 sequencing samples as of December 31, 2024 - to improve the understanding, diagnosis and care of people living 

123 
with severe obesity due to certain variants in genes associated with the MC4R pathway. Our sequencing-based 
epidemiology estimates show that each of these genetically-defined MC4R pathway deficiencies are considered rare 
diseases, according to established definitions based on patient populations. Our epidemiology estimates are approximately 
4,600 to 7,500 for U.S. patients in initial FDA-approved indications, including obesity due to BBS and biallelic POMC, 
PCSK1 or LEPR deficiencies. Our epidemiology estimates for the two more prevalent indications being studied in our 
Phase 3 EMANATE trial (SH2B1 and POMC/PCSK1) suggest that approximately 29,000 U.S. patients with one of these 
genetically driven obesities have the potential to respond well to setmelanotide. Similarly, our epidemiology estimates for 
patients with genetic indications who demonstrated an initial response following stage 1 of our Phase 2 DAYBREAK trial 
is approximately 65,300. All these patients face similar challenges as other patients with rare diseases, namely lack of 
awareness, resources, tests, tools and, especially, therapeutic options.  
We are developing setmelanotide to address additional patients with acquired hypothalamic obesity. In our Phase 
2 trial evaluating setmelanotide as a treatment for hypothalamic obesity, as announced in November 2022, 16 of 18 patients 
achieved the primary endpoint with a body mass index (BMI) decrease greater than 5 percent on setmelanotide therapy, 
and we observed a 14.5 mean percent reduction in BMI across all patients. As part of our November 2022 presentation, 
we detailed that fourteen of these patients transitioned from this Phase 2 trial into our open-label, long-term extension trial 
and they remained on therapy, as of November 3, 2023. Twelve of these 14 patients had achieved a 25.5% reduction in 
mean BMI from baseline at one year on setmelanotide therapy.  On February 22, 2024, we provided an update on progress 
of our pivotal, Phase 3 clinical trial evaluating setmelanotide in patients with acquired hypothalamic obesity. We 
completed enrollment in the Phase 3 clinical trial is designed to enroll 120 patients aged 4 years or older randomized 2:1 
to setmelanotide therapy or placebo for a total of 60 weeks, including up to eight weeks for dose titration. The primary 
endpoint is the percent change in BMI after approximately 52 weeks on a therapeutic regimen of setmelanotide versus 
placebo. Key secondary endpoints include the proportion of patients who achieve ≥5% reduction in BMI from baseline in 
adults (≥18) or BMI Z-score reduction of ≥0.2 from baseline in pediatrics after approximately 52 weeks on a therapeutic 
regimen of compared with placebo, and mean change in the weekly average of the daily most hunger score in patients ≥12 
years from baseline after approximately 52 weeks on a therapeutic regimen of setmelanotide versus placebo. We expect 
to report top-line study results in the first half of 2025. 
To date, we have not generated sufficient cash flow from product sales and have financed our operations primarily 
through the proceeds received from the sales of common and preferred stock, royalty interest financing, 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 Convertible Preferred Stock (as 
defined below).  Since our initial public offering, or IPO, on October 10, 2017 and our underwritten follow-on offerings 
through October 2022, we have raised aggregate net proceeds of approximately $832.7 million through the issuance of our 
common stock after deducting underwriting discounts, commissions and offering related transaction costs. We also 
received $100.0 million from the sale of our Rare Pediatric Disease Priority Review Voucher, or PRV, to Alexion 
Pharmaceuticals, Inc. in February 2021.  In June 2022, we entered into the Revenue Interest Financing Agreement 
(“RIFA”), with entities managed by HealthCare Royalty Partners, collectively referred to as the Investors, and through 
December 31, 2024 have received cumulative proceeds of $96.7 million, net of certain transaction costs.  We also received 
$147.8 million in net proceeds under the Investment Agreement, with certain affiliates of Perceptive Advisors LLC, or 
Perceptive, and certain other investors, relating to the issuance and sale of 150,000 shares of a new series of the Company’s 
Series A Convertible Preferred Stock, par value $0.001 per share, titled the “Series A Convertible Preferred Stock”, or the 
Convertible Preferred Stock, for an aggregate purchase price of $150.0 million, or $1,000 per share.  As of December 31, 
2024, our cash and cash equivalents and short-term investments were approximately $320.6 million. We expect that our 
existing cash and cash equivalents and short-term investments will be sufficient to fund our operations into 2027. 
We expect to continue to fund our operations through the sale of equity, debt financings or other sources. We 
have built our own marketing and commercial sales infrastructure in the United States and are in the process of building a 
similar infrastructure in several European markets and the United Kingdom.  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. 

124 
As of December 31, 2024, we had an accumulated deficit of $1,155.3 million. Our net losses were $260.6 million 
and $184.7 million for the years ended December 31, 2024 and 2023, 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 and our other product candidates; 
• 
engage contract manufacturing organizations, or CMOs, for the manufacture of clinical and commercial-
grade setmelanotide; 
• 
seek regulatory approval for setmelanotide for future indications, and for our other product candidates; 
• 
expand our clinical and financial operations and build a marketing and commercialization infrastructure;  
• 
engage in the sales and marketing efforts necessary to support the continued commercial efforts of 
IMCIVREE globally; 
• 
take into account the levels, timing and collection of revenue earned from sales of IMCIVREE and other 
products approved in the future, if any; and 
• 
continue to operate as a public company. 
As of December 31, 2024, our cash and cash equivalents and short-term investments were approximately 
$320.6 million.  We expect that our cash and cash equivalents and short-term investments as of December 31, 2024, will 
enable us to fund our operating expenses into 2027. 
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.  
Financial Operations Overview 
Revenue 
To date, we have generated approximately $227.6 million of revenue from product sales. Our lead product 
candidate, IMCIVREE, was approved by the FDA in November 2020 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. IMCIVREE became commercially available in the United States in the first quarter of 2021.  We recorded our first 
sales of IMCIVREE in the United States in March 2021 and we made our first sales in France in March 2022 under the 
paid early access program.  IMCIVREE was approval by the FDA and the EC in adult and pediatric patients six years of 
age and older with obesity due to BBS in June and September 2022, respectively.  Following these approvals for BBS, 
sales of  IMCIVREE have grown, and we expect will continue to grow as we identify and treat more patients with this 
disease and obtain reimbursement throughout the international markets in which we operate. 
Cost of sales  
All of our inventory of IMCIVREE produced prior to FDA approval is available for commercial or clinical use.  
Most of the manufacturing costs have been recorded as research and development expenses in prior periods.  We expect 
cost of sales to increase in 2025 as we continue to sell inventory that is produced after we began capitalizing manufacturing 
costs for IMCIVREE commercial inventory.     

125 
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; 
• 
facilities, depreciation, and other expenses, which include rent and maintenance of facilities, insurance and 
other operating costs;  
• 
acquired in process research and development costs associated with the acquisition of Xinvento B.V., or 
Xinvento in the three months ended March 31, 2023; and 
• 
acquired in process research and development costs associated with the acquisition of LG Chem, Ltd.’s, or 
LGC’s, proprietary compound bivamelagon in the three months ended March 31, 2024. 
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: 
 
 
December 31,  
Research and development summary 
     
2024 
     
2023 
Research and development expense 
 
$ 
 237,957  
$ 
 134,951 
 
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, RM-718, bivamelagon, and a potential 
therapeutic product candidate for congenital hyperinsulinism (CHI) 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. 
 
 

126 
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 
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 commercialization of setmelanotide as 
well as salaries and related benefits for commercial employees, including stock-based compensation.  As we further 
implement and execute our commercialization plans to market setmelanotide in new territories 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. 
 
 
 
December 31,  
Selling, general and administrative summary 
     
2024 
     
2023 
Selling, general and administrative expense 
 
$  144,304  
$  117,532 
 
We anticipate that our selling, general and administrative expenses will increase in the future to support continued 
and expanding commercialization efforts for IMCIVREE in the United States and the European Union as well as increased 
costs of operating as a global commercial stage biopharmaceutical 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 local rules and regulations in the United States and foreign jurisdictions, 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 consolidated 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. 
 
 

127 
Revenue Recognition 
In accordance with Accounting Standards Codification (ASC) 606, Revenue from Contracts with Customers, we 
recognize revenue when a customer obtains control of promised goods or services, in an amount that reflects the 
consideration we expect to receive in exchange for the goods or services provided. To determine revenue recognition for 
arrangements within the scope of ASC 606, we perform the following five steps: (1) identify the contracts with a customer; 
(2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction 
price to the performance obligations in the contract; and (5) recognize revenue when or as the entity satisfies a performance 
obligation. At contract inception, we assess the goods or services promised within each contract and determine those that 
are performance obligations and assess whether each promised good or service is distinct. We then recognize as revenue 
the amount of the transaction price that is allocated to the respective performance obligation when or as the performance 
obligation is satisfied. For all contracts that fall into the scope of ASC 606, we have identified one performance obligation: 
the sale of IMCIVREE to our customers. We have not incurred or capitalized any incremental costs associated with 
obtaining contracts with customers. 
In the United States, which accounts for the largest portion of our total revenues, the Company sells its product 
to one material specialty pharmacy.  The product is distributed through third-party logistics, or 3PL, distribution agent that 
does not take title to the product.  Once the product is delivered to the Company’s specialty pharmacy provider, our 
customer in the United States, the customer (or “wholesaler”) takes title to the product.  The wholesaler then distributes 
the product to patients.  In our distribution agreement with the 3PL company, the Company acts as principal because we 
retain control of the product. Internationally, we make sales primarily to specialty distributors and retail pharmacy chains, 
as well as hospitals, many of which are government-owned or supported.  The Company offers returns of product sold to 
the customer on a limited basis, however, no material returns have been recognized to date. 
Revenue is recorded at net selling price (transaction price), which includes estimates of variable consideration.  
Our variable consideration consists of government rebates, trade discounts, product returns and other incentives.  The 
largest of our variable consideration components is government rebates for which reserves are established for estimated 
rebates for programs such as Medicaid, Medicare and Tricare in the United States as well as certain government rebates 
and pricing adjustments in certain international markets that we operate.  We estimate these rebates based upon a range of 
possible outcomes that take into consideration the estimated payer mix.  These reserves are recorded in the same period 
the related revenue is recognized, resulting in a reduction of product revenue and the establishment of a liability that is 
included in accrued expenses and other current liabilities on our consolidated balance sheets.  On a quarterly basis, we 
update our estimates and record any necessary adjustments in the period identified.  Overall, these reserves reflect our best 
estimates of the amount of consideration to which we are entitled based on the terms of the applicable contract. If actual 
results in the future vary from estimates, we adjust these estimates, which would affect net product revenue and earnings 
in the period such variances become known.  Provisions for trade discounts, chargebacks and allowances are recorded as 
reductions to accounts receivable, and returns, government rebates, and other incentives are recorded as a component of 
accrued expenses. 
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 
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. 

128 
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 maintain the Rhythm Pharmaceuticals, Inc. 2017 Equity Incentive Plan, (the “2017 Plan”) which provides 
for the grant of incentive stock options, non-qualified stock options, stock appreciation rights, performance units, restricted 
stock awards, restricted stock units and stock grants to employees, consultants, advisors and directors, as determined by 
the board of directors. As of December 31, 2024, we had reserved 12,475,344 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. 
On February 9, 2022, our board of directors adopted the Rhythm Pharmaceuticals, Inc. 2022 Employment 
Inducement Plan (the “2022 Inducement Plan”), which became effective on such date without stockholder approval 
pursuant to Rule 5635(c)(4) of the Nasdaq Stock Market LLC listing rules (“Rule 5635(c)(4)”).  The 2022 Inducement 
Plan provides for the grant of non-qualified stock options, stock appreciation rights, performance units, restricted stock 
awards, restricted stock units and stock grants. In accordance with Rule 5635(c)(4), awards under the 2022 Inducement 
Plan may only be made to a newly hired employee who has not previously been a member of our board of directors, or an 
employee who is being rehired following a bona fide period of non-employment by the Company or a subsidiary, as a 
material inducement to the employee’s entering into employment with the Company or its subsidiary. An aggregate of 
1,000,000 shares of our common stock have been reserved for issuance under the 2022 Inducement Plan.  
The exercise price of stock options granted under the 2022 Inducement Plan will not be less than the fair market 
value of a share of our common stock on the grant date. Other terms of awards, including vesting requirements, are 
determined by our board of directors and are subject to the provisions of the 2022 Inducement Plan. Stock options granted 
to employees generally vest over a four-year period but may be granted with different vesting terms. Certain options may 
provide for accelerated vesting in the event of a change in control. Stock options granted under the 2022 Inducement Plan 
expire no more than 10 years from the date of grant. As of December 31, 2024, there were 495,978 stock option awards 
outstanding, 317,554 restricted stock unit awards outstanding and 14,586 shares of common stock available for future 
grant under the 2022 Inducement Plan. 
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. 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 
previously 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 computed the historical 
volatility data using the daily closing prices for the selected companies' shares during the equivalent period of the 

129 
calculated expected term of our stock-based awards. We 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. 
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, 2024, 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. 
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, occurs when there is a greater than 50% change in the ownership of stock among certain 
5% shareholders over a three-year period.  
 

130 
Results of Operations 
Comparison of years ended December 31, 2024 and 2023 
The following table summarizes our results of operations for the years ended December 31, 2024 and 2023, 
together with the changes in those items in dollars and as a percentage: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Year Ended  
  
 
 
 
  
 
 
December 31,  
 
Change 
  
 
    
2024 
     
2023 
    
$ 
     
% 
  
 
 
(in thousands) 
  
Statement of Operations Data: 
  
  
   
 
 
Product revenue, net 
 $  130,126  $
 77,428  $  52,698  
 68 %
Total revenues 
   130,126   
 77,428    52,698 
 
 68 %
Costs and expenses: 
   
        
      
 
   
Cost of sales 
  
 13,368   
 9,302   
 4,066  
 44 %
Research and development 
   237,957    134,951    103,006  
 76 %
Selling, general, and administrative 
    144,304     117,532     26,772  
 23 %
Total costs and expenses 
    395,629     261,785     133,844  
 51 %
Loss from operations 
    (265,503)    (184,357)    (81,146) 
 44 %
Other income (expense), net 
   
 5,247    
 243    
 5,004   2,059 %
Loss before income taxes 
   (260,256)   (184,114)   (76,142) 
 41 %
Provision for income taxes 
  
 346   
 564   
 (218) 
 (39)%
Net loss 
 $ (260,602) $ (184,678) $  (75,924) 
 41 %
 
Product revenue, net increased by $52.7 million to $130.1 million in 2024 from $77.4 million in 2023, an increase 
of 68%. We expect our sales of IMCIVREE to continue to increase following the FDA approval for the treatment of 
patients with BBS in the United States in June 2022.  We have achieved market access for IMCIVREE for BBS or POMC 
and LEPR deficiencies, or both, in more than 15 countries outside the United States, and we continue to collaborate with 
authorities to achieve access in additional markets. For the years ended December 31, 2024 and 2023, a substantial amount 
of our product revenue, or 74% and 77%, respectively, was generated from sales of our product to patients in the United 
States.  
Cost of sales. Cost of sales increased by $4.1 million to $13.4 million in 2024 from $9.3 million in 2023, an 
increase of 44%, which was driven primarily by the increase in product revenue in 2024.  Cost of sales is composed of 
royalty expense due to Ipsen on our net product sales, amortization of our capitalized sales-based milestone payment made 
to Ipsen, upon our first commercial sale in the United States and EU, the cost of product, as well as costs associated with 
our patient assistance programs.  Specifically, the $4.1 million increase in cost of sales in 2024 was due to $2.6 million of 
additional royalties due to our growth in sales and $1.5 million due to higher product costs from higher net product revenue.  
We expect cost of sales as a percentage of product revenue, net to continue to be in a range of 10% to 12% in foreseeable 
future.  
Research and development expense. Research and development expense increased by $103.0 million to 
$238.0 million in 2024 from $135.0 million in 2023, an increase of 76%. The increase was primarily due to the following: 
• 
acquired in-process research and development costs associated with the acquisition of LGC’s proprietary 
compound bivamelagon of $92.4 million; 
• 
an increase of $8.1 million in salaries, benefits and stock-based compensation related to the hiring of 
additional full-time employees in order to support the growth of our research and development programs; 
• 
an increase of $7.5 million in our Phase 3 acquired hypothalamic obesity trial, our Phase 1 clinical trial of 
RM-718 and the Phase 2 bivamelagon trial acquired from LGC. These costs were partially offset by reduced 

131 
activity due to the completion and wind down of our long term extension trial, Phase 2 Basket trial, Phase 3 
pediatrics trial, and switch trial; and 
• 
an increase of $4.3 million due to increased CMC development costs related to RM-718 and bivamelagon.  
The above increases were partially offset by: 
• 
the purchase of in-process research and development assets of $5.7 million from Xinvento in 2023, which 
did not recur in 2024; and 
• 
a decrease in our clinical trial costs associated with decreased activity in our Phase 2 DAYBREAK trial and 
pediatrics trial for setmelanotide therapy of approximately $3.6 million. 
Selling, general and administrative expense. Selling, general and administrative expense increased by 
$26.8 million to $144.3 million in 2024 from $117.5 million in 2023, an increase of 23%. The increase was primarily due 
to the following: 
• 
an increase of $18.7 million due to increased compensation and benefits related costs associated with 
additional headcount to support our expanding business operations as well as to establish commercial 
operations in international regions; 
• 
an increase of $6.7 million related to increased marketing and promotion costs to support continued revenue 
growth; and 
• 
an increase of $3.1 million related to professional services costs,  including legal, consulting and tax services. 
The above increases were partially offset by: 
• 
a decrease in inventoriable costs that were capitalized to inventory as labor and overhead, of $1.7 million.    
Other income (expense), net.  Other income (expense), net increased by $5.0 million to $5.2 million in 2024 from 
$0.2 million in 2023, which was due to the following: 
• 
a gain of $8.9 million recognized for the change in fair value of a forward contract recorded with the issuance 
of Convertible Preferred Stock; and 
• 
a change in fair value of the embedded derivative in our debt royalty obligation of $1.2 million, realized 
foreign currency gains of $0.4 million and other income of $0.4 million; and 
• 
an increase in interest income of $0.8 million earned on our short-term investments, based on higher 
investment balances from the net proceeds of $147.8 million from the convertible preferred stock issuance. 
These increases were slightly offset by: 
• 
recognition of $4.0 million of non-cash interest expense in 2024 associated with accretion of the current 
liability payable to LGC in July 2025; and 
• 
an increase in non-cash interest expense of $2.7 million related to amortization of debt discount and deferred 
financing fees associated with our higher deferred royalty obligation balance, based on the receipt of our 
final $25.0 million sales milestone in the three months ended September 30, 2023. 
 

132 
Liquidity and Capital Resources 
As of December 31, 2024, our cash and cash equivalents and short-term investments were approximately 
$320.6 million.  
Cash flows 
The following table provides information regarding our cash flows for the years ended December 31, 2024 and 
2023: 
 
 
 
 
 
 
 
 
 
  
 
 
Year Ended December 31,  
 
2024 
    
2023 
 
(in thousands) 
Net cash (used in) provided by: 
 
  
Operating activities 
$  (113,879) $  (136,157)
Investing activities 
  
 (48,173)   
 (5,665)
Financing activities 
  
 191,242    
 74,368 
Effect of exchange rates on cash 
 
 2   
 (142)
Net increase (decrease) in cash, cash equivalents and restricted cash 
$ 
 29,192    
 (67,596)
 
Net cash used in operating activities 
The use of cash in all periods resulted primarily from our net losses, adjusted for non-cash charges and changes 
in components of operating assets and liabilities. 
Net cash used in operating activities was $113.9 million for the year ended December 31, 2024, and consisted 
primarily of a net loss of $260.6 million adjusted for non-cash items of $43.8 million, which consisted of stock-based 
compensation, depreciation and amortization, non-cash interest expense, non-cash accretion and amortization of short-
term investments, non-cash accretion of other current liability, non-cash rent expense, gain on settlement of forward 
contract, and the change in the fair value of our embedded derivative liability.  Our net loss also included $92.4 million of 
acquired In-Process Research and Development (IPR&D) assets, which are classified as investing activities. The change 
in operating assets and liabilities provided net cash of approximately $10.6 million, primarily driven by increases to 
accounts payable and accrued expenses of $21.9 million, net decreases in long-term assets of $7.9 million, offset by net 
increases in accounts receivable and inventory of $13.8 million and net increases to prepaid expenses of $5.5 million. 
Net cash used in operating activities was $136.2 million for the year ended December 31, 2023, and consisted 
primarily of a net loss of $184.7 million adjusted for non-cash items of $38.0 million, which consisted of stock-based 
compensation, depreciation and amortization, non-cash rent expense, accretion and amortization of our short-term 
investments and the change in the fair value of our embedded derivative liability.  Our net loss also included $5.7 million 
of acquired IPR&D assets, which are classified as investing activities. The change in operating assets and liabilities 
reflected a total net source of cash of approximately $4.8 million primarily driven by a net increase in accounts payable 
and accrued expenses of $14.8 million, decreases in long term assets of $1.7 million  and decreases in prepaid expenses 
and other current assets of $2.7 million.  The net cash sources described above were partially offset by net cash uses from 
increases in accounts receivable and inventory totaling $14.4 million, based on the ongoing growth in the business. 
Net cash used in investing activities 
Net cash used in investing activities was $48.2 million for the year ended December 31, 2024 and related to 
purchases of short term investments for $268.3 million and cash used for the purchase of LGC’s proprietary compound 
bivamelagon for $40.0 million in January 2024, offset by gross maturities of short-term investments of $260.6 million. 
Net cash used in investing activities was $5.7 million for the year ended December 31, 2023 which related 
primarily to cash used to purchase Xinvento’s IPR&D assets in February 2023.  Our gross purchases of short-term 

133 
investments of $354.9 million were generally offset by gross proceeds from maturities of short-term investments of 
$355.0 million.  
Net cash provided by financing activities 
Net cash provided by financing activities was $191.2 million for the year ended December 31, 2024, and consisted 
of net proceeds of $147.8 million from the issuance of Convertible Perferred Stock as well as net proceeds from our ATM 
equity offering of $39.1 million.  We also received proceeds of $17.2 million from the exercise of stock options and the 
issuance of common stock from our 2017 Employee Stock Purchase Plan, or the ESPP. These proceeds were offset by 
$12.9 million of repayments on our deferred royalty obligation.  
Net cash provided by financing activities was $74.4 million for the year ended December 31, 2023, which 
consisted of  net proceeds of $48.9 million from the issuance of common stock in August 2023, net proceeds of 
$24.4 million from the final investment tranche of our deferred royalty obligation and $8.5 million of cash proceeds from 
the exercise of stock options and the issuance of common stock from the ESPP. These proceeds were partially offset by 
$7.4 million of repayments of our deferred royalty obligation.  
Revenue Interest Financing Agreement 
On June 16, 2022, we entered into the RIFA with HealthCare Royalty, for a total investment amount of up to 
$100 million. In exchange for the total investment amount to be received by us, HealthCare Royalty will receive a tiered 
royalty based on global net product sales generated by IMCIVREE. For additional information, see Note 11, “Long-term 
Obligations” to the consolidated financial statements included elsewhere in this Annual Report. 
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 and build out our global 
organization. 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 existing cash and cash equivalents and short-term investments will be sufficient to fund our 
operations into 2027. Our cash and cash equivalents are maintained at financial institutions in amounts that exceed 
federally-insured limits. In the event of failure of any of the financial institutions where we maintain our cash and cash 
equivalents, there can be no assurance that we will be able to access uninsured funds in a timely manner or at all.  
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, as well as for RM-718 
and bivamelagon, and in connection with a therapeutic product candidate for CHI; 
• 
the costs, timing and outcome of regulatory review of our setmelanotide program; as well as for RM-718 and 
bivamelagon, and in connection with a therapeutic product candidate for CHI; 

134 
• 
the costs related to the acquisition, integration, research and development and commercialization efforts 
related to the acquisition of Xinvento B.V. and any related therapeutic product candidates; 
• 
the obligations owed to Ipsen, Camurus and LG Chem, 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 became 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 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.  
Further, the global economy, including credit and financial markets, has recently experienced extreme volatility 
and disruptions, including severely diminished liquidity and credit availability, rising interest and inflation rates, declines 
in consumer confidence, declines in economic growth, increases in unemployment rates and uncertainty about economic 
stability. All of these factors could impact our liquidity and future funding requirements, including but not limited to our 
ability to raise additional capital when needed on acceptable terms, if at all. The duration of this economic slowdown is 
uncertain and the impact on our business is difficult to predict. See “Risk Factors— Unfavorable global political or 
economic conditions could adversely affect our business, financial condition or results of operations.” 
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. 
ATM 
On November 2, 2021, we entered into a Sales Agreement with Cowen and Company, LLC (“Cowen”), pursuant 
to which we may issue and sell shares of its common stock, having an aggregate offering price of up to $100.0 million, 
from time to time through an “at the market” equity offering program under which Cowen acts as sales agent (the “ATM 
Program”). Between August 10, 2023 and August 21, 2023, we sold approximately two million shares of our common 
stock in the ATM Program for net proceeds of approximately $48.9 million. 

135 
On February 29, 2024, we and Cowen entered into Amendment No. 1 to Sales Agreement (the “Amendment”) to 
increase the aggregate offering price of the shares of common stock that may be issued and sold pursuant to the Sales 
Agreement to $200.0 million (excluding the aggregate offering price of shares of common stock issued and sold pursuant 
to the Sales Agreement prior to February 29, 2024). In connection with the Amendment, on February 29, 2024, we filed 
with the SEC a prospectus supplement, dated February 29, 2024, which, combined with the Base Prospectus (together, the 
“New Prospectus”), amended the Prior Prospectus in its entirety. The issuances and sales under the Sales Agreement, as 
amended by the Amendment, will be made pursuant to the Registration Statement and the New Prospectus. 
Beginning on December 10, 2024 the company sold 744,595 shares of common stock in the ATM program for 
net proceeds of $41.2 million as of December 31, 2024.  The company sold an additional 587,510 shares of common stock 
in the ATM program through January 21, 2025 for net proceeds of approximately $32.1 million. 
Other funding 
On September 19, 2022, we completed a public offering of 4,800,000 shares of common stock at a price to the 
public of $26.00 per share. We received $116,887 in net proceeds after deducting underwriting discounts, commissions 
and offering expenses. In addition, we granted the underwriters a 30-day option to purchase up to an additional 
720,000 shares of its common stock at the price to the public, less underwriting discounts and commissions. On 
October 18, 2022, we completed the sale of an additional 580,000 shares of common stock at a price to the public of 
$26.00 per share pursuant to the partial exercise of the underwriters’ option to purchase additional shares, for aggregate 
net proceeds of approximately $14,175, after deducting underwriting discounts, commissions and offering expenses. 
In April 2024, we received $147.8 million in net proceeds under the Investment Agreement, with certain affiliates 
of Perceptive Advisors LLC, or Perceptive, and certain other investors, relating to the issuance and sale of 150,000 shares 
of a new series of the Company’s Convertible Preferred Stock for an aggregate purchase price of $150.0 million, or 
$1,000 per share.   
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 LG Chem, 
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 and at 
December 31, 2024 there were $27.0 million of remaining milestones that may be achieved and due to Ipsen at a future 
date. During 2022, we paid Ipsen a $4.0 million milestone upon our first commercial sale of IMCIVREE in Europe.  We 
did not make additional milestone payments to Ipsen during 2023 or 2024.  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 the weekly formulation of setmelanotide is 
successfully developed, receives regulatory approval and is commercialized, Camurus may receive aggregate payments of 
up to $64.8 million upon the achievement of certain development and commercial milestones under the license agreement 
and royalties on future product sales.  As of December 31, 2024, there were $62.5 million of remaining milestones that 
may be achieved and for which Camurus would receive payment at a future date. We paid Camurus a $1.0 million 
milestone in 2022 upon the achievement of a development milestone.  We did not make any milestone payments to 
Camurus during 2023 or 2024. 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 weekly formulation of setmelanotide.   

136 
Under the terms of the LG Chem license agreement, we have paid LG Chem $40 million in cash, issued shares 
of our common stock with an aggregate value of $20 million and agreed to make a $40 million payment in cash 18 months 
after the effective date of the license agreement.  We have also agreed to pay LG Chem up to $205 million in cash upon 
achieving various regulatory and sales milestones based on net sales of bivamelagon.  In addition and subject to the 
completion of Phase 2 development of bivamelagon, the Company has agreed to pay LGC royalties of between low-to-
mid single digit percent of net revenues from its MC4R portfolio, including bivamelagon, commencing in 2029 and 
dependent upon achievement of various regulatory and indication approvals, and subject to customary deductions and anti-
stacking. Royalties may further increase to a low double digit percent royalty, though such royalty would only be applicable 
on net sales of bivamelagon in a region if bivamelagon is covered by a composition of matter or method of use patent 
controlled by LGC in such region and the Company’s MC4R portfolio is not covered by any composition of matter or 
method of use patents controlled by the Company in such region. Such increased rate would only apply on net sales of 
bivamelagon for the limited remainder of the royalty term in the relevant region.  We entered into this agreement in 2024 
and have not yet made any milestone payments. 
Based on our current development plans as of December 31, 2024, we expect to make milestone payments to 
third parties, during the next 12 months from the filing of this Annual Report. These milestones include a $40.0 million 
payment to LG Chem in July of 2025 (which is the second and final license fee installment, payable to LGC within eighteen 
(18) months of the effective date of the LG Chem license agrreement) and a $2.0 million payment to the sellers of Xinvento 
upon the commencement of Good Laboratory Practice (GLP) toxicity trials (currently expected to begin in 2025. 
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 our financial statements and are 
excluded from the table below. 
On May 2, 2024, we entered into an agreement to amend the current operating lease agreement for our head office 
facility in Boston, Massachusetts. Under the amendment, the current lease was extended for five years through July 31, 
2030.  The 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. 
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. 
 

137 
Item 9A. Controls and Procedures 
Limitations on Effectiveness of Controls and Procedures 
 
We maintain disclosure controls and procedures (as that term is defined in Rules 13a-15(e) and 15d-15(e) under 
the Exchange Act). 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 Exchange Act), 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, 2024, our disclosure controls and 
procedures were effective at the reasonable assurance level.  
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) of the Exchange Act). Our management assessed the effectiveness of our 
internal control over financial reporting as of December 31, 2024. 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 upon such assessment, our management concluded that our internal control over financial reporting was 
effective as of December 31, 2024. 
Material Weakness in Internal Control 
 
As previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2023, we identified 
a material weakness in internal control related to ineffective information technology general controls, or ITGCs, in the 
areas of user access and program change management over our key accounting and reporting information technology, or 
IT, system. As a result, the related business process controls (IT application controls and IT-dependent manual controls) 
that are dependent on the ineffective ITGCs, or that use data produced from the system impacted by the ineffective ITGCs, 
were also ineffective. 
The material weakness identified above did not result in any material misstatements in our financial statements 
or disclosures, and there were no changes to previously released financial results.   
Remediation of Material Weakness 
 
Our management is committed to maintaining a strong internal control environment. In response to the identified 
material weakness above, we implemented measures designed to improve internal control over financial reporting to 
remediate the control deficiencies that led to our material weakness. 
Our remediation actions included: (i) developing and implementing additional training and awareness programs 
addressing ITGCs and policies, including educating control owners concerning the principles and requirements of each 
control, with a focus on user access; (ii) increasing the extent of oversight and verification checks included in the operation 
of user access and program change management controls and processes; (iii) deploying additional tools to support 
administration of user access and program change management; and (iv) enhancing quarterly management reporting on 
the remediation measures to the Audit Committee of the Board of Directors. 

138 
Management has concluded that the material weaknesses described above have been remediated. The applicable 
controls have been in place for a sufficient period of time and management has concluded, through testing, that the controls 
operated effectively. 
Changes in Internal Control Over Financial Reporting  
 
Except as described above, 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 2024 that have materially 
affected, or are reasonably likely to materially affect, our internal control over financial reporting.  
Attestation of Independent Registered Public Accounting Firm 
 
Ernst & Young LLP, our independent registered public accounting firm, has issued an attestation report on our 
internal control over financial reporting, which is included below. 
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, 
2024, 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, 2024, 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, 2024 and 2023, the related 
consolidated statements of operations and comprehensive loss, convertible preferred stock and stockholders’ equity and 
cash flows for each of the three years in the period ended December 31, 2024, and the related notes and our report dated 
February 28, 2025 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. 

139 
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 
February 28, 2025   
  
 
Item 9B. Other Information 
 
a) Disclosure in lieu of reporting on a Current Report on Form 8-K. 
 
None. 
 
b) Insider Trading Arrangements and Policies. 
 
On December 13, 2024, Yann Mazabraud, the Company’s EVP, Head of International, adopted a trading 
plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act for 
the sale of up to 99,495 shares of the Company’s common stock until November 11, 2025. 
 
On December 16, 2024, Pamela Cramer, the Company’s Chief Human Resources Officer, terminated a 
trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange 
Act, originally adopted on May 10, 2024, for the sale of up to 98,937 shares of the Company’s common 
stock, originally set to expire on May 15, 2025. 
 
On December 16, 2024, Pamela Cramer, the Company’s Chief Human Resources Officer, adopted a 
trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange 
Act for the sale of up to 50,394 shares of the Company’s common stock until March 17, 2026. 
 
Other than as disclosed above, during the three months ended December 31, 2024, no director or officer 
of the Company adopted or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading 
arrangement,” as each term is defined in Item 408(a) of Regulation S-K. 
 
 

140 
Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections. 
Not applicable. 
PART III 
Item 10. Directors, Executive Officers and Corporate Governance 
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 2025 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, 2024.  
 
Item 11. Executive Compensation 
The information required under this item is incorporated herein by reference to our definitive proxy statement for 
our 2025 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, 2024. 
 
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, 2024, regarding our common stock that may be 
issued under (1) the 2017 Plan; (2) our 2017 Employee Stock Purchase Plan, (the 2017 ESPP); and (3) the 2022 
Inducement Plan. 
 
 
     
Number of Securities 
     
Weighted-Average 
     
Number of Securities 
 
 
to be Issued Upon Exercise  
Exercise Price 
 
Available for Future 
 
 
of Outstanding Options,  
of Outstanding Options,  
Issuance Under Equity 
Plan Category: 
 
Warrants and Rights 
 
Warrants and Rights 
 
Compensation Plans 
Equity compensation plans approved 
by stockholders 
  
 
  
 
  
2017 Plan 
  
 7,873,890  
$ 
 23.32  
  
 4,622,751 
2017 ESPP 
  
 —  
 
 —  
  
 1,875,738 
Equity compensation plans not 
approved by stockholders 
  
 
 
 
 
2022 Inducement Plan 
 
 813,532  
 
 22.91  
 
 14,856 
Total 
  
 8,687,422  
$ 
 19.19  
 
 6,513,345 
 
(1) The 2017 Plan provides for an annual increase on each January 1 commencing in 2018 and ending in 2027, 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. 
 
 

141 
(2) The 2017 ESPP provides for an annual increase on each January 1 commencing in 2018 and ending in 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. 
(3) The 2022 Inducement Plan adopted on February 9, 2022. Awards issued under the 2022 Inducement Plan may only be made to a newly hired employee 
who has not previously been a member of the Company’s board of directors, or an employee who is being rehired following a bona fide period of 
non-employment by the Company or a subsidiary, as a material inducement to the employee’s entering into employment with the Company or its 
subsidiary. An aggregate of 1,000,000 shares of the Company’s common stock were reserved for issuance under the 2022 Inducement Plan. The 
material terms of the 2022 Inducement Plan are described in Note 9 to the consolidated financial statements included herein.  
Other 
The remaining information required under this item is incorporated herein by reference to our definitive proxy 
statement for our 2025 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, 2024. 
 
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 2025 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, 2024. 
 
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 2025 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, 2024. 
 
 
 

142 
PART IV 
Item 15. Exhibits and Financial Statement Schedules 
(a) 1. Consolidated Financial Statements. 
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. 
 
 
 

143 
Exhibit Index 
* 
 
 
 
 
 
 
 
 
 
 
     
 
     
Incorporated by Reference 
 
Exhibit 
Number 
 
Exhibit Description 
 
Form 
     
Date 
     
Number 
 
2.1 
 
Asset Purchase Agreement, dated January 5, 2021, 
between the Registrant and Alexion Pharmaceuticals, 
Inc. 
 
8-K 
 
1/5/2021 
 
2.1 
 
2.2 
 
Share Purchase Agreement, by and between Rhythm 
Pharmaceuticals Netherlands B.V. and Xinvento B.V., 
dated February 27, 2023. 
 
10-K 
 
3/1/2023 
 
2.2 
 
3.1 
 
Amended and Restated Certificate of Incorporation. 
 
10-Q 
 
5/4/2020 
 
3.1 
 
3.2 
 
Amended and Restated Bylaws. 
 
8-K 
 
12/18/2023 
 
3.1 
 
3.3 
 
Amended and Restated Certificate of Designations 
 
10-Q 
 
05/07/2024 
 
3.4 
 
4.1 
 
Form of Common Stock Certificate. 
 
S-1/A 
 
9/25/2017 
 
4.1 
 
4.2 
 
Form of Indenture to be entered into between the 
Registrant and a trustee acceptable to the registrant. 
 
S-3 
 
11/2/2021 
 
4.3 
 
4.3 
 
Form of Indenture. 
 
S-3ASR  
3/2/2023 
 
4.1 
 
4.4 
 
Description of the Registrant’s Securities registered 
pursuant to Section 12 of the Securities Exchange Act of 
1934. 
 
10-K 
 
3/1/2023 
 
4.3 
 
10.1† 
 
Form of Indemnification Agreement. 
 
S-1/A 
 
9/25/2017 
 
10.1 
 
10.2† 
 
2015 Equity Incentive Plan and Form of Option 
Agreement and Notice of Exercise. 
 
S-1/A 
 
9/25/2017 
 
10.21 
 
10.3.1† 
 
2017 Equity Incentive Plan and Form of Option 
Agreement and Notice of Exercise.  
 
10-Q 
 
11/14/2017 
 
10.2 
 
10.3.2† 
 
2017 Equity Incentive Plan Restricted Stock Unit Award 
Agreement 
 
10-K 
 
3/2/2020 
 
10.18 
 
10.3.3† 
 
2017 Equity Incentive Plan Performance Unit 
Agreement 
 
10-Q 
 
05/07/2024 
 
10.4 
 
10.4.1† 
 
2017 Employee Stock Purchase Plan 
 
10-Q 
 
11/14/2017 
 
10.10 
 
10.4.2† 
 
First Amendment to the 2017 Employee Stock Purchase 
Plan 
 
S-1 
 
6/18/2018 
 
10.17 
 
10.5.1† 
 
2022 Employment Inducement Plan and Form of Option 
Agreement 
 
10-K 
 
3/1/2022 
 
10.5.1 
 
10.5.2† 
 
2022 Employment Inducement Plan Form of Restricted 
Stock Unit Agreement 
 
10-K 
 
3/1/2022 
 
10.5.2 
 
10.6† 
 
Non-Employee Director Compensation Program 
 
10-Q 
 
8/6/2024 
 
10.1 
 
10.7‡ 
 
License Agreement, dated March 21, 2013, by and 
between the Registrant (f/k/a Rhythm Metabolic, Inc.) 
and Ipsen Pharma S.A.S. 
 
S-1 
 
9/5/2017 
 
10.6 
 
10.8‡ 
 
License Agreement, dated January 4, 2016, by and 
between the Registrant and Camurus AB. 
 
S-1 
 
9/5/2017 
 
10.8 
 
10.9‡‡ 
 
License Agreement, dated December 3, 2021, by and 
between the Registrant and RareStone Group Ltd. 
 
10-K 
 
3/1/2022 
 
10.10 
 
10.10.1‡ 
 
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). 
 
S-1 
 
9/5/2017 
 
10.7 
 
10.10.2‡ 
 
First Amendment to Development and Manufacturing 
Services Agreement, dated February 20, 2020, by and 
between the Registrant and Corden Pharma Brussels 
S.A. 
 
10-Q 
 
5/4/2020 
 
10.3 
 

144 
10.10.3‡ 
 
Second Amendment to Development and Manufacturing 
Services Agreement, dated July 15, 2020, by and 
between the Registrant and Corden Pharma Brussels 
S.A. 
 
10-Q 
 
8/3/2020 
 
10.1 
 
10.11 
 
Development and Manufacturing Services Agreement, 
dated as of December 21, 2016, by and between 
Registrant and Recipharm Monts S.A.S. 
 
S-1 
 
9/5/2017 
 
10.15 
 
10.12.1 
 
Lease, dated November 25, 2015, by and between the 
Registrant and 500 Boylston & 222 Berkeley Owner 
(DE) LLC. 
 
S-1 
 
9/5/2017 
 
10.11 
 
10.12.2 
 
First Amendment to Lease, dated April 15, 2016, by and 
between the Registrant and 500 Boylston & 222 
Berkeley Owner (DE) LLC. 
 
10-K 
 
3/8/2019 
 
10.9 
 
10.12.3 
 
Second Amendment to Lease, dated August 6, 2018, by 
and between the Registrant and 500 Boylston & 222 
Berkeley Owner (DE) LLC. 
 
8-K 
 
8/9/2018 
 
10.1 
 
10.12.4 
 
Third Amendment to Lease, dated August 6, 2018, by 
and between the Registrant and 500 Boylston & 222 
Berkeley Owner (DE) LLC. 
 
10-Q 
 
05/07/2024 
 
10.5 
 
10.13† 
 
Amended & Restated Offer Letter, dated August 3, 
2023, by and between the Registrant and Hunter Smith. 
 
8-K 
 
8/3/2023 
 
10.4 
 
10.14† 
 
Offer Letter, dated September 4, 2020, by and between 
the Registrant and Yann Mazabraud. 
 
10-Q 
 
11/2/2020 
 
10.1 
 
10.19† 
 
Amended & Restated Offer Letter, dated July 28, 2023, 
by and between the Registrant and Joseph Shulman. 
 
8-K 
 
8/3/2023 
 
10.2 
 
10.20† 
 
Amended & Restated Offer Letter, dated August 3, 
2023, by and between the Registrant and Jennifer Chien. 
 
8-K 
 
8/3/2023 
 
10.3 
 
10.21† 
 
Amended & Restated Offer Letter, dated July 28, 2023, 
by and between the Registrant and David P. Meeker. 
 
8-K 
 
8/3/2023 
 
10.1 
 
10.22† 
 
Offer Letter, dated July 9, 2021, by and between the 
Registrant and Pamela Cramer 
 
10-Q 
 
8/3/2021 
 
10.1 
 
10.23‡‡ 
 
Revenue Interest Financing Agreement, dated June 16, 
2022, by and between the Company and entities 
managed by HealthCare Royalty Management, LLC 
 
10-Q 
 
8/03/2022 
 
10.1 
 
10.24‡‡ 
 
Exclusive License Agreement, dated January 4, 2024, by 
and between Rhythm Pharmaceuticals, Inc. and LG 
Chem, Ltd. 
 
10-K 
 
2/29/2024 
 
10.25 
 
10.25‡‡ 
 
Investment Agreement dated April 1, 2024, by and 
between Rhythm Pharmaceuticals, Inc., certain affiliates 
of Perceptive Advisors LLC, and certain other investors 
 
8-K 
 
04/01/2024 
 
10.1 
 
19.0* 
 
Rhythm Global Insider Trading Policy 
 
 
 
 
 
 
 
21.1* 
 
List of Subsidiaries. 
 
 
 
 
 
 
 
23.1* 
 
Consent of Ernst & Young LLP, Independent Registered 
Public Accounting Firm. 
 
 
 
 
 
 
 
31.1* 
 
Certification of the Chief Executive Officer, as required 
by Section 302 of the Sarbanes-Oxley Act of 2002 (18 
U.S.C. 1350). 
 
 
 
 
 
 
 
31.2* 
 
Certification of the Chief Financial Officer, as required 
by Section 302 of the Sarbanes-Oxley Act of 2002 (18 
U.S.C. 1350). 
 
 
 
 
 
 
 
32.1** 
 
Certification of the Chief Executive Officer, as required 
by Section 906 of the Sarbanes-Oxley Act of 2002 (18 
U.S.C. 1350). 
 
 
 
 
 
 
 

145 
32.2** 
 
Certification of the Chief Financial Officer, as required 
by Section 906 of the Sarbanes-Oxley Act of 2002 (18 
U.S.C. 1350). 
 
 
 
 
 
 
 
97† 
 
Policy for Recovery of Erroneously Awarded 
Compensation 
 
10-K 
 
2/29/2024 
 
97 
 
101.INS* 
 
Inline XBRL Instance Document- the Instance 
Document does not appear in the interactive data file 
because its XBRL tags are embedded within the Inline 
XBRL document. 
 
 
 
 
 
 
 
101.SCH* 
 
Inline XBRL Taxonomy Extension Schema Document.  
 
 
 
 
 
 
101.CAL* 
 
Inline XBRL Taxonomy Extension Calculation 
Linkbase Document. 
 
 
 
 
 
 
 
101.DEF* 
 
Inline XBRL Taxonomy Extension Definition Linkbase 
Document. 
 
 
 
 
 
 
 
101.LAB* 
 
Inline XBRL Taxonomy Extension Label Linkbase 
Document. 
 
 
 
 
 
 
 
101.PRE* 
 
Inline XBRL Taxonomy Extension Presentation 
Linkbase Document. 
 
 
 
 
 
 
 
104* 
 
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. 
‡‡ 
Indicates that portions of this exhibit (indicated by asterisks) have been omitted pursuant to Regulation S-K, Item 
601(b)(10). Such omitted information is not material and the registrant customarily and actually treats such 
information as private or confidential. 
 
 
Item 16. Form 10-K Summary 
None 
 
 

146 
SIGNATURES 
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. 
 
 
 
 
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 
 
    
Date 
 
  
 
 
 
/s/ David P. Meeker M.D. 
 Chief Executive Officer, Director, Chairman of the Board 
 
 February 28, 2025 
David P. Meeker M.D. 
 (Principal Executive Officer) 
 
 
 
 
  
 
 
 
/s/ Hunter Smith 
 Chief Financial Officer 
 
 February 28, 2025 
Hunter Smith 
 (Principal Financial Officer) 
 
 
 
 
  
 
 
 
/s/ Christopher P. German 
 Corporate Controller 
 
 February 28, 2025 
Christopher P. German 
 (Principal Accounting Officer) 
 
 
 
 
  
 
 
 
/s/ Edward T. Mathers 
 Lead Director 
 
 February 28, 2025 
Edward T. Mathers 
  
 
 
 
 
  
 
 
 
/s/ Stuart Arbuckle 
 Director 
 
 February 28, 2025 
Stuart Arbuckle 
  
 
 
 
 
  
 
 
 
/s/ Camille L. Bedrosian, M.D.  Director 
 
 February 28, 2025 
Camille L. Bedrosian M.D. 
  
 
 
 
 
  
 
 
 
/s/ Jennifer L. Good 
 Director 
 
 February 28, 2025 
Jennifer L. Good 
  
 
 
 
 
  
 
 
 
/s/ Christophe R. Jean 
 Director 
 
 February 28, 2025 
Christophe R. Jean 
  
 
 
 
 
  
 
 
 
/s/ David W. J. McGirr 
 Director 
 
 February 28, 2025 
David W. J. McGirr 
  
 
 
 
 
  
 
 
 
/s/ Lynn A. Tetrault 
 Director 
 
 February 28, 2025 
Lynn A. Tetrault 
  
 
 
 
 

F-1 
RHYTHM PHARMACEUTICALS, INC.  
 
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS 
 
 
Page No. 
Report of Independent Registered Public Accounting Firm (PCAOB ID No. 42) 
F-2
 
Audited Consolidated Financial Statements: 
 
Consolidated Balance Sheets 
F-5
Consolidated Statements of Operations and Comprehensive Loss 
F-6
Consolidated Statements of Convertible Preferred Stock & Stockholders’ Equity 
F-7
Consolidated Statements of Cash Flows 
F-8
Notes to Consolidated Financial Statements 
F-9
 
 
 
 

F-2 
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, 2024 and 2023, the related consolidated statements of operations and comprehensive loss, convertible 
preferred stock and stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2024, 
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, 2024 
and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 
2024, 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, 2024, 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 February 28, 2025 expressed an unqualified opinion 
thereon. 
 
Basis for Opinion 
 
These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion 
on the Company’s financial statements based on our audits. We are a public 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. 
 
Critical Audit Matter 
 
The critical audit matters communicated below are matters arising from the current period audit of the financial statements 
that were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or 
disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex 
judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial 
statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate 
opinions on the critical audit matters or on the accounts or disclosures to which they relate. 
 
 
 
 
Accrued and Prepaid Research and Development Expenses related to Phase 3 EMANATE, Phase 3 evaluation of
setmelanotide on acquired hypothalamic obesity and Phase 2 evaluation of bivamelagon on acquired hypothalamic
obesity clinical trials 
Description of the Matter 
 
 
The Company’s accrued expenses and other current liabilities related to research
and development costs were $17.9 million at December 31, 2024. In addition, the 
Company’s prepaid expenses and other current assets and other long-term assets 
related to research and development costs were $7.6 million and $6.2 million,
respectively, at December 31, 2024. As discussed in Note 2 of the consolidated
financial 
statements, 
the 
Company’s 
research 
and 
development

F-3 
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 the
balance sheet date. 
 
Auditing certain of the Company’s accrued and prepaid research and
development expenses for clinical trials was complex and judgmental, as
accounting for the costs associated with these clinical trials required significant
estimates of the level of services performed and the associated costs incurred by
service providers. Additionally, due to the long duration of these clinical trials
and the timing of invoicing received from third parties, the actual amounts
incurred are not always known prior to the issuance of the Company’s financial
statements. 
How We Addressed the Matter in 
Our Audit 
 
To evaluate the prepaid and accrued research and development costs for these
clinical trials at December 31, 2024, our audit procedures included, among others,
testing the completeness and accuracy of the underlying data used in the estimates
and evaluating the significant judgements and estimates made by management to
determine the recorded prepaid and accrued amounts. To test the significant
judgments and estimates, we corroborated the progress of research and 
development activities through discussion with the Company’s research and
development personnel that oversee the research and development projects and
inspected the Company’s contracts with third parties and any pending change
orders to assess the impact on amounts recorded. In addition, we tested estimates
of costs incurred to date by confirming actual costs incurred with the relevant
third parties and through review of invoices received by the Company. We also
analyzed fluctuations in prepaid and accrued amounts by vendor and by trial
throughout the period subject to audit, evaluated the costs incurred per trial, site
and/or patient for reasonableness and tested subsequent invoices received from
third parties 
 
 
 
Allowances for Rebates under the Medicaid Drug Rebate Program 
 
 
 
Description of the Matter 
 
As discussed in Note 2 to the Company’s consolidated financial statements, the
Company recognizes revenue from product sales based on amounts due from
customers net of allowances for variable consideration. Variable consideration
includes, among others, rebates mandated by law under Medicaid. The Company
includes an estimate of variable consideration in its transaction price at the time
of sale, when control of the product transfers to the customer. The Company 
estimates its Medicaid Drug Rebate Program accruals based on monthly sales,
historical experience of claims submitted by the various states and jurisdictions,
contractual rebate rates and estimated lag time of the rebate invoices. Rebate 
accruals inclusive of estimated amounts payable for claims not yet received or
processed as part of the Company’s Medicaid program are recorded within
accrued expenses and other current liabilities on the Company’s consolidated
balance sheet. 
 
Auditing the allowances for rebates owed pursuant to the Medicaid Drug Rebate
Program in the U.S. was complex and judgmental due to the complexity of the
government mandated calculations. The allowances for rebates owed pursuant to
the Medicaid Drug Rebate Program in the U.S. are sensitive to these calculations.
 
 
 

F-4 
How We Addressed the Matter in 
Our Audit 
 
 
Our audit procedures to test the allowances for rebates owed pursuant to the
Medicaid Drug Rebate Program included, among others, procedures to assess the 
methodology used to determine the allowance, procedures to test the
completeness and accuracy of the underlying data used in the analysis and
procedures to test the significant assumptions utilized. To assess the methodology
used to determine the allowance, we involved our government pricing specialists
to assist in evaluating the Company’s methodology and calculations to measure
certain estimated rebates. To test the completeness and accuracy of the underlying
data used in the Company’s analysis, we compared the data used in the
Company’s calculations to third-party invoices, historical claims data and actual
cash payments through the date of the Company’s financial statements. To test
the significant assumptions used in the analysis, we involved our government 
pricing specialists to assist us evaluating the calculations to measure certain
estimated rebates. 
 
 
/s/ Ernst & Young LLP 
 
We have served as the Company’s auditor since 2015. 
 
Boston, Massachusetts 
February 28, 2025 
 
 
 

F-5 
RHYTHM PHARMACEUTICALS, INC. 
CONSOLIDATED BALANCE SHEETS 
(in thousands, except share and per share data) 
 
 
 
 
 
 
 
 
 
December 31,  
 
December 31,  
 
     
2024 
     
2023 
 
 
 
 
 
 
 
Assets 
 
 
 
 
Current assets: 
  
 
    
 
  
Cash and cash equivalents 
 
$ 
 89,137  
$ 
 60,081 
Short-term investments 
 
  
 231,428  
  
 215,765 
Accounts receivable, net 
 
 
 18,512  
 
 14,867 
Inventory 
 
 
 18,741  
 
 8,624 
Prepaid expenses and other current assets 
 
  
 16,382  
  
 8,931 
Total current assets 
 
  
 374,200  
  
 308,268 
Property and equipment, net 
 
  
 632  
  
 1,341 
Right-of-use asset 
 
 
 3,477  
 
 781 
Intangible assets, net 
 
 
 6,174  
 
 7,028 
Restricted cash 
 
  
 464  
  
 328 
Other long-term assets 
 
 
 7,326  
 
 14,999 
Total assets 
 
$ 
 392,273  
$ 
 332,745 
Liabilities, Convertible Preferred Stock and Stockholders’ equity 
 
  
   
  
  
Current liabilities: 
 
  
   
  
  
Accounts payable 
 
$ 
 12,328  
$ 
 4,885 
Accrued expenses and other current liabilities 
 
  
 62,658  
  
 48,262 
Other current liability - LG Chem 
 
 
 37,704  
 
 — 
Deferred revenue 
 
 
 1,286  
 
 1,286 
Deferred royalty obligation, current 
 
 
 1,541  
 
 — 
Lease liability 
 
  
 —  
  
 770 
Total current liabilities 
 
  
 115,517  
  
 55,203 
Long-term liabilities: 
 
  
   
  
  
Deferred royalty obligation 
 
 
 108,269  
 
 106,143 
Lease liability, non-current 
 
  
 3,938  
  
 490 
Derivative liability 
 
 
 —  
 
 1,150 
Total liabilities 
 
  
 227,724  
  
 162,986 
Commitments and contingencies (Note 12) 
 
 
 
 
Series A convertible preferred stock, $0.001 par value: 150,000 shares authorized; 
150,000 and 0 shares issued and outstanding at December 31, 2024 and 
December 31, 2023, respectively. Liquidation preference of $150,000 as of 
December 31, 2024. 
 
 
 142,820  
 
 — 
Stockholders’ equity: 
 
  
   
  
  
Common stock, $0.001 par value: 120,000,000 shares authorized; 62,390,654 and 
59,426,559 shares issued and outstanding at December 31, 2024 and 
December 31, 2023, respectively 
 
  
 61  
  
 59 
Additional paid-in capital 
 
 
 1,177,045  
 
 1,064,302 
Accumulated other comprehensive (loss) income 
 
 
 (39) 
 
 134 
Accumulated deficit 
 
  
 (1,155,338) 
  
 (894,736)
Total stockholders’ equity 
 
  
 21,729  
  
 169,759 
Total liabilities, convertible preferred stock and stockholders’ equity 
 
$ 
 392,273  
$ 
 332,745 
 
The accompanying notes are an integral part of these financial statements. 
 
 

F-6 
RHYTHM PHARMACEUTICALS, INC. 
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS 
(in thousands, except share and per share data) 
 
 
 
 
 
 
 
 
 
 
 
 
Year Ended  
Year Ended 
 
Year Ended 
 
 
December 31,   
December 31,  
 
December 31,  
 
     
2024 
     
2023 
     
2022 
Revenues: 
 
 
 
 
 
 
  
 
Product revenue, net 
 $ 
 130,126  $ 
 77,428  $ 
 16,884 
License revenue 
  
 —   
 —   
 6,754 
Total revenues 
  
 130,126   
 77,428   
 23,638 
Costs and expenses: 
  
  
  
Cost of sales 
  
 13,368   
 9,302   
 2,133 
Research and development 
  
 237,957   
 134,951   
 108,630 
Selling, general, and administrative 
   
 144,304    
 117,532    
 92,032 
Total costs and expenses 
   
 395,629    
 261,785    
 202,795 
Loss from operations 
   
 (265,503)   
 (184,357)   
 (179,157)
Other income (expense): 
   
     
     
  
Other income (expense), net 
   
 2,239    
 190    
 (790)
Gain on settlement of forward contract 
  
 8,900   
 —   
 — 
Interest expense 
  
 (20,603)  
 (13,892)  
 (5,201)
Interest income 
   
 14,711    
 13,945    
 4,029 
Total other income (expense), net 
   
 5,247    
 243    
 (1,962)
Loss before income taxes 
  
 (260,256)  
 (184,114)  
 (181,119)
Provision for income taxes 
  
 346   
 564   
 — 
Net loss 
 $  (260,602) $  (184,678) $  (181,119)
Accrued dividends on convertible preferred stock 
  
 (3,970)  
 —   
 — 
Net loss attributable to common stockholders 
 $  (264,572) $  (184,678) $  (181,119)
Net loss per share attributable to common stockholders, basic 
and diluted 
 $ 
 (4.34) $ 
 (3.20) $ 
 (3.47)
 
  
  
  
Weighted-average common shares outstanding, basic and diluted 
   60,995,204    57,673,128    52,120,701 
 
  
  
  
Other comprehensive loss: 
  
  
  
Net loss attributable to common stockholders 
 $  (264,572) $  (184,678) $  (181,119)
Foreign currency translation adjustment 
  
 2   
 (140)  
 — 
Unrealized (loss) gain, net on marketable securities, net of tax 
   
 (175)   
 366    
 (91)
Comprehensive loss 
 $  (264,746) $  (184,452) $  (181,210)
 
The accompanying notes are an integral part of these financial statements. 
 

F-7 
RHYTHM PHARMACEUTICALS, INC. 
CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK & STOCKHOLDERS' EQUITY 
(in thousands, except share data) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
Accumulated 
  
 
 
 
 
 
Series A Convertible 
 
 
  
 
 
Additional 
 
Other 
  
 
 
Total 
 
 
Preferred Stock 
 
Common Stock 
 
Paid-In 
 Comprehensive  
Accumulated 
 
Stockholders’ 
 
     
Shares 
     
Amount 
   
Shares 
    Amount      
Capital 
    Income (Loss) 
 
Deficit 
    
Equity 
Balance at December 31, 2021 
 
 —  
 
 — 
 50,283,574   
 50  
 
 813,041   
 (1)
 
 (528,939)  
 284,151 
Stock compensation expense 
 
 —   
  
 — 
  
 —    
 —   
 
 19,831    
 — 
 
 —    
 19,831 
Issuance of common stock in connection with ESPP 
 
 —   
  
 — 
  
 92,932   
 —   
 
 626    
 — 
 
 —    
 626 
Issuance of common stock in connection with exercise of stock options 
and vesting of restricted stock units 
 
 —   
  
 — 
  
 855,923    
 1   
 
 9,751    
 — 
 
 —    
 9,752 
Issuance of common stock upon completion of public offering, net of 
offering costs 
 
 —   
  
 — 
  
 5,380,000   
 5   
 
 131,107    
 — 
 
 —    
 131,112 
Net unrealized loss on marketable securities 
 
 —   
  
 — 
  
 —    
 —   
 
 —    
 (91)
 
 —    
 (91)
Net loss 
 
 —  
 
 — 
 —   
 —  
 
 —   
 — 
 
 (181,119)  
 (181,119)
Balance at December 31, 2022 
 
 — 
 $ 
 — 
   56,612,429 
$ 
 56 
 $ 
 974,356 
 $ 
 (92)
$ 
 (710,058)  $ 
 264,262 
Stock compensation expense 
 
 —   
  
 — 
  
 —    
 —   
 
 32,553    
 — 
 
 —    
 32,553 
Issuance of common stock in connection with ESPP 
 
 —   
  
 — 
  
 49,819   
  
 
 1,053    
 — 
 
 —    
 1,053 
Issuance of common stock in connection with exercise of stock options 
and vesting of restricted stock units 
 
 —   
  
 — 
  
 745,066    
 1   
 
 7,467    
 — 
 
 —    
 7,468 
Issuance of common stock upon completion of ATM equity offering, net 
of offering costs 
 
 —  
 
 — 
 2,019,245   
 2  
 
 48,873   
 — 
 
 —   
 48,875 
Foreign currency translation adjustment 
 
 —  
 
 — 
 —   
 —  
 
 —   
 (140)
 
 —   
 (140)
Net unrealized gain on marketable securities 
 
 —   
  
 — 
  
 —    
 —   
 
 —    
 366 
 
 —    
 366 
Net loss 
 
 —  
 
 — 
 —   
 —  
 
 —   
 — 
 
 (184,678)  
 (184,678)
Balance at December 31, 2023 
 
 — 
 $ 
 — 
   59,426,559 
$ 
 59 
 $ 
 1,064,302 
 $ 
 134 
$ 
 (894,736)  $ 
 169,759 
Issuance of Series A Preferred Stock, net of $2,250 of issuance costs 
 
 150,000 
 
 138,850 
 — 
 
 — 
 
 — 
 
 — 
 
 — 
 
 — 
Stock compensation expense 
 
 — 
 
 — 
 —    
 —   
 
 39,682    
 — 
 
 —    
 39,682 
Issuance of common stock in connection with ESPP 
 
 — 
 
 — 
 44,554   
 —  
 
 1,270   
 — 
 
 —   
 1,270 
Issuance of common stock in connection with exercise of stock options 
and vesting of restricted stock units 
 
 — 
 
 — 
 1,742,803   
 2  
 
 15,972   
 — 
 
 —   
 15,974 
Issuance of common stock as consideration for LGC license 
 
 — 
 
 — 
 432,143   
 —  
 
 18,716   
 — 
 
 —   
 18,716 
Issuance of common stock upon completion of ATM equity offering, net 
of $1,125 offering costs 
 
 — 
 
 — 
 744,595   
 —  
 
 41,073   
 — 
 
 —   
 41,073 
Accretion of preferred stock dividends 
 
 — 
 
 3,970 
 —   
 —  
 
 (3,970)  
 — 
 
 —   
 (3,970)
Foreign currency translation adjustment 
 
 — 
 
 — 
 —   
 —  
 
 —   
 2 
 
 —   
 2 
Net unrealized loss on marketable securities 
 
 — 
 
 — 
 —    
 —   
 
 —    
 (175)
 
 —    
 (175)
Net loss 
 
 — 
 
 — 
 —    
 —   
 
 —    
 — 
 
 (260,602)   
 (260,602)
Balance at December 31, 2024 
 
 150,000 
$ 
 142,820 
 62,390,654 
$ 
 61 
$ 
 1,177,045 
$ 
 (39)
$ 
 (1,155,338)
$ 
 21,729 
 
The accompanying notes are an integral part of these financial statements. 
 

F-8 
RHYTHM PHARMACEUTICALS, INC. 
CONSOLIDATED STATEMENTS OF CASH FLOWS 
(in thousands) 
 
 
 
 
 
 
 
 
 
 
 
 
Year ended December 31,  
 
     
2024 
     
2023 
 
2022 
Operating activities 
 
 
 
 
 
 
Net loss 
 
$  (260,602) 
$  (184,678)
$  (181,119)
Adjustments to reconcile net loss to net cash used in operating activities: 
 
  
   
  
  
   
Stock-based compensation expense 
 
  
 39,682  
  
 32,553 
  
 19,831 
Depreciation and amortization 
 
  
 1,563  
  
 1,758 
  
 1,672 
Non-cash interest expense 
 
 
 20,603  
 
 13,360 
 
 5,389 
Non-cash accretion & amortization of short-term investments 
 
 
 (8,165) 
 
 (9,835)
 
 (2,314)
Non-cash rent expense 
 
  
 400  
  
 401 
  
 (267)
Loss on RareStone equity investment 
 
 
 —  
 
 — 
 
 1,040 
Change in fair value of embedded derivative liability 
 
 
 (1,420) 
 
 (190)
 
 (250)
Gain on settlement of forward contract 
 
 
 (8,900) 
 
 — 
 
 — 
Acquired IPR&D assets classified as investing activities 
 
 
 92,385  
 
 5,667 
 
 — 
Changes in operating assets and liabilities: 
 
  
 
  
   
Accounts receivable 
 
 
 (3,645) 
 
 (8,643)
 
 (5,199)
Inventory 
 
 
 (10,117) 
 
 (5,707)
 
 (2,806)
Prepaid expenses and other current assets 
 
  
 (5,524) 
  
 2,876 
  
 498 
Deferred revenue 
 
 
 —  
 
 (148)
 
 (6,606)
Other long-term assets, net 
 
  
 7,943  
  
 1,656 
  
 (4,840)
Accounts payable, accrued expenses and other liabilities 
 
  
 21,918  
  
 14,773 
  
 1,543 
Net cash used in operating activities 
 
   (113,879) 
  
 (136,157)
   (173,428)
Investing activities 
 
  
   
  
  
   
Purchases of short-term investments 
 
   (268,313) 
  
 (354,918)
   (251,937)
Maturities of short-term investments 
 
  
 260,640  
  
 354,967 
   284,247 
Acquisition of IPR&D assets 
 
 
 (40,500) 
 
 (5,667)
 
 — 
Payment of milestone obligation under license agreement 
 
 
 —  
 
 — 
 
 (4,000)
Purchases of property and equipment 
 
  
 —  
  
 (47)
  
 (281)
Net cash (used in) provided by investing activities 
 
  
 (48,173) 
  
 (5,665)
 
 28,029 
Financing activities 
 
  
   
  
  
   
Repayment of deferred royalty obligation 
 
 
 (12,900) 
 
 (7,398)
 
 — 
Proceeds from the exercise of stock options 
 
  
 15,976  
  
 7,468 
  
 9,752 
Proceeds from issuance of common stock from ESPP 
 
  
 1,270  
  
 1,053 
  
 626 
Net proceeds from issuance of common stock 
 
 
 39,146  
 
 48,875 
  131,112 
Proceeds from royalty financing agreement, net of issuance costs 
 
 
 —  
 
 24,370 
 
 72,338 
Gain on settlement of forward contract 
 
 
 8,900  
 
 — 
 
 — 
Proceeds from Series A Preferred Stock, net of issuance costs 
 
 
 138,850  
 
 — 
 — 
Net cash provided by financing activities 
 
  
 191,242  
  
 74,368 
   213,828 
Effect of exchange rates on cash 
 
 
 2  
 
 (142)
 
 — 
Net increase (decrease) in cash, cash equivalents and restricted cash 
 
  
 29,192  
  
 (67,596)
  
 68,429 
Cash, cash equivalents and restricted cash at beginning of period 
 
  
 60,409  
  
 128,005 
 
 59,576 
Cash, cash equivalents and restricted cash at end of period 
 
$ 
 89,601  
$ 
 60,409 
$  128,005 
Supplemental disclosure of non-cash investing and financing activities: 
 
 
 
 
  
Non-current liability issued in exchange for the acquisition of IPR&D 
 $ 
 33,669  $ 
 — 
$ 
 — 
Issuance of common stock in exchange for IPR&D 
 $ 
 18,716  $ 
 — 
$ 
 — 
Accretion of preferred stock dividends 
 $ 
 3,970  $ 
 — 
$ 
 — 
 
The accompanying notes are an integral part of these financial statements. 

F-9 
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 global, commercial-stage biopharmaceutical 
company dedicated to transforming the lives of patients and their families living with rare neuroendocrine  diseases. We 
are focused on advancing our melanocortin-4 receptor agonists, including our lead asset, IMCIVREE® (setmelanotide), as 
a precision medicine designed to treat hyperphagia and severe obesity caused by MC4R pathway diseases. While obesity 
affects hundreds of millions of people worldwide, we are developing therapies for a subset of individuals who have 
hyperphagia, a pathological hunger, and severe obesity due to an impaired MC4R pathway, which may be caused by 
traumatic injury or genetic variants. The MC4R pathway is an endocrine pathway in the brain that is responsible for 
regulating hunger, caloric intake and energy expenditure, which consequently affect body weight. IMCIVREE, an MC4R 
agonist for which we hold worldwide rights, is the first-ever therapy developed for patients with certain rare diseases that 
is approved or authorized in the United States, European Union (EU), Great Britain, Canada and other countries and 
regions. 
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 has wholly owned subsidiaries in 
the US, Ireland, the United Kingdom, the Netherlands, France, Germany, Italy, Spain, Japan and Canada. 
The Company is subject to risks and uncertainties common to commercial-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 sufficient revenue from product sales to fund 
operations.  
Liquidity 
The Company has incurred operating losses and negative cash flows from operations since inception.  As of 
December 31, 2024, the Company had an accumulated deficit of $1,155,338.  The Company has primarily funded these 
losses through the proceeds from the sales of our common stock and preferred stock, asset sales, royalty financing, out-
license arrangements, as well as capital contributions received from the former parent company, Rhythm Holdings LLC. 
To date, the Company has minimal 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, the acquisition of in process research and development assets, manufacturing, conducting 
clinical trials for its product candidates, protecting its intellectual property, 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, 2024, the Company had $320,565 of cash and cash equivalents and short-term investments on 
hand.  In the future, the Company will be dependent on obtaining funding from third parties, such as proceeds from the 
 

F-10 
issuance of debt, sale of equity, proceeds from out license arrangements, product sales 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 but are not limited to, estimates related to determining 
our net product revenue, and accruals related to research and development expenses. 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. 
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 currently operates in two business segments, which are U.S. and international 
segments for the development and commercialization of therapies for patients with rare diseases. A single management 
team that reports to the Chief Executive Officer comprehensively manages the entire business. The Company meets the 
aggregation criteria of ASC 280 and therefore has one reportable segment for the year ended December 31, 2024.   
In November 2023, the FASB issued ASU 2023-07 – Segment Reporting (Topic 280) – Improvements to 
Reportable Segment Disclosures, which improves segment disclosure requirements, primarily through enhanced 
disclosure requirements for significant segment expenses. The improved disclosure requirements apply to all public entities 
that are required to report segment information, including those with only one reportable segment. The Company adopted 
the guidance in the fiscal year beginning January 1, 2024. There was no impact on the Company’s reportable segments 
identified and additional required disclosures have been included in Note 15.   

F-11 
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. 
The Company is exposed to risks associated with extending credit to customers related to the sale of products. 
The Company does not require collateral to secure amounts due from its customers. For the years ended December 31, 
2024 and 2023, approximately 74% and 77%, respectively, of all of the Company’s revenue was generated from a single 
customer in the United States.  As of December 31, 2024 and 2023, approximately 67% and 67%, respectively, of the 
Company’s accounts receivable was outstanding from a single customer in the United States. 
 
The Company relies on third-party manufacturers and suppliers for manufacturing and supply of its product. The 
inability of the suppliers or manufacturers to fulfill supply requirements of the Company could materially impact future 
operating results. A change in the relationship with the suppliers or manufacturer, or an adverse change in their business, 
could materially impact future operating results. 
 
The Company relies on separate third parties to perform genetic testing in the United States and Europe, 
respectively. The inability of the vendor to fulfill testing services for the Company could materially impact future operating 
results and adversely impact our ability to further develop setmelanotide. A change in the relationship with the genetic 
testing service providers, or an adverse change in their business, could materially impact future operating results. 
 
Cash and Cash Equivalents 
The Company considers all highly liquid investments with 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 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, 2024, 2023, and 2022, the Company did not recognize any credit losses related to its available-
for-sale debt securities. Further, as of December 31, 2024 and 2023, 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 card. 

F-12 
Accounts Receivable, net 
Accounts receivable consists of amounts due from customers, net of customer allowances for cash discounts and 
any estimated expected credit losses. The Company's measurement of expected credit losses is based on relevant 
information about past events, including historical experience, current conditions, and reasonable and supportable forecasts 
that affect the collectability of the reported amount. To date, the Company has not experienced any material credit losses. 
The Company's contracts with its customers have customary payment terms that generally require payment within 90 days. 
The Company analyzes amounts that are past due for collectability, and periodically evaluates the creditworthiness of its 
customer.  At December 31, 2024 and 2023, the Company determined an allowance for doubtful account was not required 
based upon its review of contractual payments and its customer payment histories.  
 
Revenue Recognition 
The Company recognizes revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers, 
or ASC 606. Under ASC 606, an entity recognizes revenue when its customer obtains control of promised goods or services 
in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. 
Product Revenue, Net 
In the United States, which accounts for the largest portion of our total revenues, the Company sells its product 
to one material specialty pharmacy.  The product is distributed through third-party logistics, or 3PL, distribution agent that 
does not take title to the product.  Once the product is delivered to the Company’s specialty pharmacy provider, our 
customer in the United States, the customer (or “wholesaler”) takes title to the product.  The wholesaler then distributes 
the product to patients.  In our distribution agreement with the 3PL company, the Company acts as principal because we 
retain control of the product. Internationally, we make sales primarily to specialty distributors and retail pharmacy chains, 
as well as hospitals, many of which are government-owned or supported.  The Company offers returns of product sold to 
the customer on a limited basis, however, no material returns have been recognized to date. 
Revenue from product sales is recognized when the customer obtains control of our product, which occurs at a 
point in time, upon transfer of title to the customer because at that point in time we have no ongoing obligations to the 
customer.  There are no other performance obligations besides the sale of product.  We classify payments to our customers 
or other parties in the distribution channel for services that are distinct and priced at fair value as selling, general and 
administrative expenses in our consolidated statements of operations and comprehensive loss. Otherwise, payments to a 
customer or other parties in the distribution channel that do not meet those criteria are classified as a reduction of revenue, 
as discussed further below.  Taxes collected from the customer relating to product sales and remitted to governmental 
authorities are excluded from revenue.  Because our payment terms are generally ninety days or less, the Company 
concluded there is not a significant financing component because the period between the transfer of a promised good or 
service to the customer and when the customer pays for that good or service will be one year or less.  The Company 
expenses incremental costs of obtaining a contract as and when incurred since the expected amortization period of the 
asset that we would have recognized is one year or less. 
Reserves for Variable Consideration 
Revenues from product sales are recorded at the net sales price, or the transaction price, which includes estimates 
of variable consideration for which reserves are established and which result from discounts, rebates, and co-pay assistance 
that are offered within contracts between us and our customers, health care providers and other indirect customers relating 
to the sale of IMCIVREE.  These reserves are based on the amounts earned or to be claimed on the related sales and are 
classified as reductions of accounts receivable (if the amount is payable to the customer) or a current liability (if the amount 
is payable to a party other than a customer).  Where appropriate, these estimates take into consideration a range of possible 
outcomes that are probability-weighted for relevant factors such as our historical experience, current contractual and 
statutory requirements, specific known market events and trends, industry data and forecasted customer buying and 
payment patterns.  Overall, these reserves reflect our best estimates of the amount of consideration to which we are entitled 
based on the terms of the contract.  The amount of variable consideration that is included in the transaction price may be 
constrained and is included in the net sales price only to the extent that it is considered probable that a significant reversal 

F-13 
in the amount of the cumulative revenue recognized will not occur in a future period.  Actual amounts of consideration 
ultimately received may differ from our estimates.  If actual results in the future vary from our estimates, we will adjust 
these estimates, which would affect net product revenue and earnings in the period such variances become known. 
The following are the components of variable consideration related to product revenue: 
Government rebates:  The Company is subject to discount obligations under government programs, including 
U.S. Medicaid programs, Medicare and Tricare in the United States as well as certain government rebates and pricing 
adjustments in certain international markets that we operate.  We estimate these rebates based upon a range of possible 
outcomes that take into consideration the estimated payer mix.  These reserves are recorded in the same period the related 
revenue is recognized, resulting in a reduction of product revenue and the establishment of a liability that is included in 
accrued expenses and other current liabilities on our condensed consolidated balance sheets.  On a quarterly basis, we 
update our estimates and record any necessary adjustments in the period that we identify the adjustments. 
Trade discounts and allowances:  The Company provides customary invoice discounts on IMCIVREE sales to 
certain of our customers for items such as prompt payment. These are recorded as a reduction of revenue in the period the 
related product revenue is recognized.  In addition, we receive and pay for various distribution services from our customers 
in the distribution channel.  For services that are not distinct from the sale of our product, such fees are classified as a 
reduction of product revenue. 
Product returns:  Our customers have limited return rights related to the product’s damage or defect.  The 
Company estimates the amount of product sales that may be returned and records the estimate as a reduction of revenue 
and a refund liability in the period the related product revenue is recognized. Based on the distribution model for 
IMCIVREE, the Company believes there will be minimal returns and these reserves have not been material to date. 
Other incentives:  Other incentives include co-payment assistance the Company provides to patients with 
commercial insurance that have coverage and reside in states that allow co-payment assistance.  The calculation of the 
accrual for co-pay assistance is based on an estimate of claims and the cost per claim that we expect to receive associated 
with product that has been recognized as revenue.  The estimate is recorded as a reduction of revenue in the same period 
the related revenue is recognized. 
Provisions for trade discounts, chargebacks and allowances are recorded as reductions to accounts receivable, 
and returns, government rebates, and other incentives are recorded as a component of accrued expenses. 
The table below summarizes balances and activity in each of the product revenue allowance and reserve categories 
as follows: 
 
    Provision for Cash Discounts    Fees, Rebates and Other Incentives    
Total 
Beginning Balance at December 31, 2022 
 $ 
 99  $ 
 2,710  $  2,809 
Provision related to sales in the current year 
  
 1,672   
 17,351    19,023 
Credit and payments made 
  
 (1,572)   
 (10,586)    (12,158)
Ending balance December 31, 2023 
 $ 
 199  $ 
 9,475  $  9,674 
Provision related to sales in the current year 
  
 2,317   
 27,315    29,632 
Credit and payments made 
   
 (2,263)   
 (20,940)    (23,203)
Ending balance December 31, 2024 
 $ 
 253  $ 
 15,850  $  16,103 
 
Provision for cash discounts are recorded as reductions of accounts receivable, and fees, rebates, and other 
incentives are recorded as components of accrued expenses. 
 
 

F-14 
License Agreements 
We generate revenue from license or similar agreements with pharmaceutical companies for the development and 
commercialization of certain of our products and product candidates. Such agreements may include the transfer of 
intellectual property rights in the form of licenses, transfer of technological know-how, delivery of drug substances, 
research and development services, and participation on certain committees with the counterparty. Payments made by the 
customers may include non-refundable upfront fees, payments upon the exercise of customer options, payments based 
upon the achievement of defined milestones, and royalties on sales of products and product candidates if they are approved 
and commercialized. 
If a license to our intellectual property is determined to be distinct from the other performance obligations 
identified in the arrangement, we recognize the transaction price allocated to the license as revenue upon transfer of control 
of the license. We evaluate all other promised goods or services in the agreement to determine if they are distinct. If they 
are not distinct, they are combined with other promised goods or services to create a bundle of promised goods or services 
that is distinct. Optional future services where any additional consideration paid to us reflects their standalone selling 
prices do not provide the customer with a material right and, therefore, are not considered performance obligations. If 
optional future services are priced in a manner which provides the customer with a significant or incremental discount, 
they are material rights, and are accounted for as separate performance obligations.  
We utilize judgment to determine the transaction price. In connection therewith, we evaluate contingent 
milestones at contract inception to estimate the amount which is not probable of a material reversal to include in the 
transaction price using the most likely amount method. Milestone payments that are not within our control, such as 
regulatory approvals, are not considered probable of being achieved until those approvals are received and therefore the 
variable consideration is constrained. The transaction price is then allocated to each performance obligation on a relative 
stand-alone selling price basis, for which we recognize revenue as or when the performance obligations under the contract 
are satisfied. At the end of each reporting period, we re-evaluate the probability of achieving development milestone 
payments that may not be subject to a material reversal and, if necessary, adjust our estimate of the overall transaction 
price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect license and other revenue, 
as well as earnings, in the period of adjustment.  
We then determine whether the performance obligations or combined performance obligations are satisfied over 
time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing 
revenue from non-refundable, upfront fees. We evaluate the measure of progress, as applicable, for each reporting period 
and, if necessary, adjust the measure of performance and related revenue recognition. 
When consideration is received, or such consideration is unconditionally due, from a customer prior to 
transferring goods or services to the customer under the terms of a contract, a contract liability is recorded within deferred 
revenue. Contract liabilities within deferred revenue are recognized as revenue after control of the goods or services is 
transferred to the customer and all revenue recognition criteria have been met. 
For arrangements that include sales-based royalties, including sales-based milestone payments, and a license of 
intellectual property that is deemed to be the predominant item to which the royalties relate, we recognize revenue at the 
later of when the related sales occur or when the performance obligation to which some or all of the royalties have been 
allocated has been satisfied (or partially satisfied).  Refer to Note 10 “Significant Agreements”, for discussion related to 
the Company’s accounting for the  RareStone Group, Ltd. agreement. 
Deferred Royalty Obligation  
We treat the debt obligation to HealthCare Royalty Management, LLC as discussed further in Note 11, “Long-
Term Obligations”, as a deferred royalty obligation, amortized using the effective interest rate method over the estimated 
life of the revenue streams. We recognize interest expense thereon using the effective rate, which is based on our current 
estimates of future revenues over the life of the arrangement. In connection therewith, we periodically assess our expected 
revenues using internal projections, impute interest on the carrying value of the deferred royalty obligation, and record 
interest expense using the imputed effective interest rate. To the extent our estimates of future revenues are greater or less 

F-15 
than previous estimates or the estimated timing of such payments is materially different than previous estimates, we will 
account for any such changes by adjusting the effective interest rate on a prospective basis, with a corresponding impact 
to the reclassification of our deferred royalty obligation. The assumptions used in determining the expected repayment 
term of the deferred royalty obligation and amortization period of the issuance costs requires that we make estimates that 
could impact the classification of such costs, as well as the period over which such costs will be amortized. 
Inventory 
Prior to receiving approval from the FDA in November 2020 to sell IMCIVREE in the United States, the 
Company expensed all costs incurred related to the manufacture of IMCIVREE as research and development expense 
because of the inherent risks associated with the development of a drug candidate, the uncertainty about the regulatory 
approval process and the lack of history for the Company of regulatory approval of drug candidates. The Company values 
inventories at the lower of cost or estimated net realizable value. The Company determines the cost of inventories, which 
includes amounts related to materials and manufacturing overhead, on a first-in, first-out basis. Raw materials and work 
in process includes all inventory costs prior to packaging and labelling, including raw materials, active pharmaceutical 
ingredient, and drug product. Finished goods include packaged and labelled products. Raw materials and work in process 
that may be used for either research and development or commercial sale are classified as inventory until the material is 
consumed or otherwise allocated for research and development. If the material is intended to be used for research and 
development, it is expensed as research and development once that determination is made.    
Inventory consists of the following: 
 
 
 
 
 
 
 
 
 
December 31,   
December 31,  
 
     
2024 
     
2023 
Raw Materials 
 
$ 
 6,776  
$ 
 4,625 
WIP 
 
  
 1,250  
  
 1,104 
Finished Goods 
 
  
 10,715  
  
 2,895 
Total Inventory 
 
$ 
 18,741  
$ 
 8,624 
 
Cost of Product Sales 
Cost of product sales consists of manufacturing costs, transportation and freight, amortization of capitalized 
intangibles, royalty payments and indirect overhead costs associated with the manufacturing and distribution of 
IMCIVREE. Cost of product sales may also include periodic costs related to certain manufacturing services and inventory 
adjustment charges.  Finally, cost of sales may also include costs related to excess or obsolete inventory adjustment 
charges, abnormal costs, unabsorbed manufacturing and overhead costs, and manufacturing variances. 
Intangible Assets, net 
Definite-lived intangible assets related to capitalized milestones under license agreements are amortized on a 
straight-line basis over their remaining useful lives, which are estimated to be the remaining patent life. If our estimate of 
the product’s useful life is shorter than the remaining patent life, then a shorter period is used. Amortization expense is 
recorded as a component in cost of sales in the consolidated statements of operations and comprehensive loss.  
Impairment of Long-Lived Assets  
The Company evaluates its long-lived assets, which consist primarily of property and equipment and finite lived 
intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of such 
assets may not be recoverable. Factors that the Company considers in deciding when to perform an impairment review 
include significant underperformance of the business in relation to expectations, significant negative industry or economic 
trends and significant changes or planned changes in the use of the assets. The Company measures recoverability of assets 
to be held and used by comparing the carrying amount of an asset to the future undiscounted net cash flows expected to 
be generated by the asset. If such assets are considered to be impaired, the Company measures the impairment to be 
recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset, less the cost to 

F-16 
sell.  No events or changes in circumstances existed to require an impairment assessment during the years ended 
December 31, 2024, 2023 and 2022. 
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: 
 
 
 
 
 
 
 
 
 
 
December 31,  
 
     
2024 
     
2023 
Prepaid research and development costs 
 
$ 
 7,580  
$ 
 2,259 
Other current assets 
 
  
 8,802  
  
 6,672 
Prepaid expenses and other current assets 
 
$ 
 16,382  
$ 
 8,931 
 
Other Long-Term Assets 
Other long-term assets consist primarily of costs incurred in advance of services being received, including 
services related to clinical trial programs.  Since the Company will not receive services within one year of the balance 
sheet date, these assets are considered long-term.  Other long-term assets consists of the following: 
 
 
 
 
 
 
 
 
 
 
December 31,  
 
     
2024 
     
2023 
Long-term research and development costs 
 
$ 
 6,209  
$ 
 12,594 
Other long-term assets 
 
  
 1,117  
  
 2,405 
Other long-term assets 
 
$ 
 7,326  
$ 
 14,999 
 
Property and Equipment 
Property and equipment consists of the following: 
 
 
 
 
 
 
 
 
 
 
 
 
Useful  
 
December 31,  
 
     
Life 
     
2024 
     
2023 
Leasehold improvements 
  
* 
 $ 
 2,705  
$ 
 2,705 
Office equipment 
  
5 years  
  
 154  
  
 155 
Computers and software 
  
3 years  
  
 1,291  
  
 1,291 
Furniture, fixtures and equipment 
  
5 years  
  
 1,249  
  
 1,249 
 
  
   
  
 5,399  
  
 5,400 
Less accumulated depreciation and amortization 
  
   
  
 (4,767) 
  
 (4,059)
Property and equipment, net 
  
   
$ 
 632  
$ 
 1,341 
 
* Shorter of asset life or lease term. 
Depreciation and amortization expense related to property and equipment for the years ended December 31, 2024, 
2023 and 2022 was $710, $903, and $896 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. 

F-17 
Acquired IPR&D and Milestone Expense 
In an asset acquisition, payments incurred prior to regulatory approval to acquire rights to in-process research and 
development projects are expensed as acquired IPR&D and recorded as a component of research and development expense 
in the consolidated statements of operations and comprehensive net loss unless the project has an alternative future use. 
These costs include upfront and development milestone payments related to licensing arrangements, or other asset 
acquisitions that provide rights to develop, manufacture and/or sell pharmaceutical products. Where contingent 
development milestone payments are due to third parties, prior to regulatory approval, the payment obligations are 
expensed when the milestone results are achieved. Regulatory and commercial milestone payments made to third parties 
subsequent to regulatory approval are capitalized as intangible assets and amortized to cost of products sold over the 
remaining useful life of the related product. 
Foreign Currency Translation 
The assets and liabilities of the Company’s subsidiaries with functional currencies other than the U.S. dollar are 
translated into U.S. dollars at exchange rates in effect at the balance sheet date. Revenue and expense amounts for these 
subsidiaries are translated using the average exchange rates for the period. Changes resulting from foreign currency 
translation are included in accumulated other comprehensive income (loss) on the Company’s consolidated statement of 
stockholders’ equity.  Net foreign currency exchange transaction gains (losses), which are included in other (expense) 
income, net on our consolidated statements of operations, were immaterial for the years ended December 31, 2024, 2023 
and 2022. 
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 and derivative liability at December 31, 2024 and  
2023 were carried at fair value, determined according to the fair value hierarchy.  See Note 5 for further discussion. 
The carrying amounts reflected in the consolidated balance sheets for accounts payable and accrued expenses and 
other current liabilities approximate their fair values due to their short-term maturities at December 31, 2024 and 2023, 
respectively. 
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 

F-18 
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. 
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 as provision for income taxes 
in the accompanying consolidated statements of operations. As of December 31, 2024 and 2023, no accrued interest or 
penalties are included as a component of accrued expenses in the consolidated balance sheets. 
Net Loss Per Share 
Basic net loss per share is computed by dividing net loss available to common shareholders 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 more dilutive of the 
if-converted or treasury stock method. For purposes of the diluted net loss per share calculation, stock options, restricted 
stock units and performance 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. 

F-19 
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, under either the 
treasury stock or if-converted method for the periods indicated: 
 
 
 
 
 
 
 
 
 
 
 
 
 
Year Ended 
 
 
December 31,  
 
     
2024 
     
2023 
 
2022 
Stock options 
 
 
 6,611,391  
  6,551,025 
 
 6,354,544 
Restricted stock units 
 
   1,805,412  
   1,079,382 
  
 774,166 
Performance stock units 
 
 
 249,322  
 
 581,246 
 
 804,797 
Common stock reserved for the conversion of Series A 
convertible preferred stock 
 
 
 3,124,995  
 
 
Potential common shares 
 
  11,791,120  
  8,211,653 
 
 7,933,507 
 
Comprehensive Loss 
Comprehensive 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, foreign currency translation adjustments 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 $1,311, $555 and $406 for the years ended December 31, 2024, 2023 and 2022, 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.  See Note 16. 
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. 
In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax 
Disclosures, or ASU 2023-09. The new guidance requires that an entity, on an annual basis, disclose additional income 
tax information, primarily related to the rate reconciliation and income taxes paid. The amendments in the ASU are 
intended to enhance the transparency and decision usefulness of income tax disclosures. The amendments in this update 
are effective for us beginning in fiscal year ending December 31, 2025.  We are currently evaluating the impact of the new 
standard on our consolidated financial statements which is expected to result in enhanced disclosures, however, we do not 
otherwise expect the adoption of the new guidance to have a material impact on our financial condition or results of 
operations. 
In November 2023, the FASB issued ASU 2023-07 – Segment Reporting (Topic 280) – Improvements to 
Reportable Segment Disclosures, which improves segment disclosure requirements, primarily through enhanced 
disclosure requirements for significant segment expenses. The improved disclosure requirements apply to all public entities 
that are required to report segment information, including those with only one reportable segment. The Company adopted 
the guidance in the fiscal year beginning January 1, 2024. There was no impact on the Company’s reportable segments 
identified and additional required disclosures have been included in Note 15. 

F-20 
3. Asset Acquisitions 
LG Chem, Ltd. 
On January 4, 2024, the Company entered into a license agreement and share issuance agreement with LG Chem, 
Ltd. (“LGC”).  Under the terms of the license agreement, the Company obtained worldwide rights to LGC’s proprietary 
compound bivamelagon and assumed sponsorship of two ongoing LGC Phase 2 studies designed to evaluate safety, 
tolerability, pharmacokinetics and weight loss efficacy of bivamelagon.  
 
The total purchase consideration of $92.4 million consisted of cash payments with a present value of $73.7 million 
and $18.7 million in the Company’s common shares. At closing, $40.0 million of cash paid was paid and shares were 
issued at a per share price equal to the ten-day volume weighted average closing price for our common stock, calculated 
as of the trading day immediately prior to January 4, 2024. The total purchase consideration also includes an additional 
$40.0 million license fee payable 18 months from the date of execution, whose present value at closing was $33.7 million 
and is being accreted to its full value through interest expense. The company recorded $0.8 million of transaction costs 
associated with this transaction, which are recorded as selling, general and administrative expenses. The carrying value of 
the license fee payable is $37.7 million as of December 31, 2024. 
 
In addition, under the terms of the license agreement, we agreed to pay LGC up to $205 million in cash upon 
achieving various regulatory and sales milestones based on net sales of bivamelagon.  In addition and subject to the 
completion of Phase 2 development of bivamelagon, the Company has agreed to pay LGC royalties of between low-to-
mid single digit percent of net revenues from its MC4R portfolio, including bivamelagon, commencing in 2029 and 
dependent upon achievement of various regulatory and indication approvals, and subject to customary deductions and anti-
stacking. Royalties may further increase to a low double digit percent royalty, though such royalty would only be applicable 
on net sales of bivamelagon in a region if bivamelagon is covered by a composition of matter or method of use patent 
controlled by LGC in such region and the Company’s MC4R portfolio is not covered by any composition of matter or 
method of use patents controlled by the Company in such region. Such increased rate would only apply on net sales of 
bivamelagon for the limited remainder of the royalty term in the relevant region. 
 
The assets acquired were In-Process Research and Development (“IPR&D”) assets.  However, since the IPR&D 
assets were determined to have no alternative future use, the Company recognized the $92.4 million of purchase 
consideration as research and development expense in the year ended December 31, 2024. 
The Company determined that the additional contingent consideration did not meet the definition of a derivative 
as of the acquisition date.  Therefore, the Company did not record a contingent consideration liability on the acquisition 
date.  The Company will recognize any future contingent consideration payments related to the LGC transaction in the 
period in which the achievement of the underlying milestones becomes probable.  
 
Xinvento B.V. 
On February 27, 2023, the Company, through its wholly-owned Dutch subsidiary, Rhythm Pharmaceuticals 
Netherlands B.V., a Dutch private limited liability company (“Rhythm BV”), entered into a Share Purchase Agreement 
(the “Purchase Agreement”) with Xinvento B.V., a Dutch private limited liability company based in the Netherlands 
(“Xinvento”), and the other parties named therein, pursuant to which, and concurrently with the execution thereof, Rhythm 
BV acquired all of the issued and outstanding shares of Xinvento. The aggregate consideration at closing was 
approximately $5.7 million, inclusive of transaction costs, as adjusted pursuant to the terms of the Purchase Agreement 
and subject to the distribution and payment terms set forth therein (the “Closing Purchase Price”).   
In addition to the Closing Purchase Price, the Purchase Agreement provides for the payment of additional 
contingent consideration totaling up to $206 million upon achievement of certain development, regulatory and commercial 
milestones by Xinvento, as follows: (i) up to an aggregate of $6 million in clinical development milestones; (ii) up to an 
aggregate of $125 million in regulatory approval and commercial milestones; and (iii) up to an aggregate of $75 million 
in sales milestones in the event a second molecule is selected, developed and approved. 

F-21 
The total purchase consideration of $5.7 million was composed of $4.5 million of cash paid at closing, a 
$0.5 million holdback, payable on the one-year anniversary of the acquisition, and $0.6 million of acquisition-related costs.  
The $0.5 million holdback was paid in the quarter ended March 31, 2024, and is reflected in investing activities in the 
consolidated statement of cash flow for the year ended December 31, 2024.  The Company determined that substantially 
all of the value as of acquisition date related to Xinvento’s In-Process Research and Development.  As a result, the 
Company determined this transaction should be accounted for as an asset acquisition.     
The assets acquired were In-Process Research and Development (IPR&D) assets.  However, since the IPR&D 
assets were determined to have no alternative future use, the Company recognized the $5.7 million of purchase 
consideration as research and development expense in the year ended December 31, 2023. 
The Company determined that the additional contingent consideration did not meet the definition of a derivative 
as of the acquisition date.  Therefore, the Company did not record a contingent consideration liability on the acquisition 
date.  The Company will recognize any future contingent consideration payments related to the Xinvento transaction in 
the period in which the achievement of the underlying milestones becomes probable. 
Xinvento's results of operations are included in the consolidated financial statements from the date of acquisition. 
For the years ended December 31, 2024 and 2023, the net loss associated with the operations of Xinvento was de minimis 
in the Company’s consolidated statements of operations. 
4. Accrued Expenses 
Accrued expenses consists of the following: 
 
 
 
 
 
 
 
 
 
 
December 31,  
 
December 31,  
 
     
2024 
     
2023 
Research and development costs 
 
$ 
 17,871  
$ 
 12,925 
Professional fees 
 
  
 4,280  
  
 3,833 
Payroll related 
 
  
 18,216  
  
 15,439 
Royalties 
 
 
 2,091  
 
 1,180 
Sales allowances 
 
 
 15,850  
 
 9,475 
Other 
 
  
 4,350  
  
 5,410 
Accrued expenses and other current liabilities 
 
$ 
 62,658  
$ 
 48,262 
 
5. Fair Value of Financial Assets and Liabilities 
The following tables present information about the Company's financial assets and liabilities measured at fair 
value on a recurring basis and indicate the level of the fair value hierarchy utilized to determine such fair values: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fair Value Measurements as of 
 
 
December 31, 2024 using: 
 
     
Level 1 
     
Level 2 
     
Level 3 
     
Total 
Assets: 
 
 
 
 
 
 
 
 
Cash equivalents: 
   
     
     
     
  
Commercial Paper 
 
$ 
 —  
$ 
 2,984  
$ 
 —  
$ 
 2,984 
Money market funds 
 
 
 71,334  
 
 —  
 
 —  
 
 71,334 
Marketable securities: 
 
  
   
  
   
  
   
  
  
US treasury securities 
 
 
 65,118  
 
 —  
 
 —  
 
 65,118 
Corporate debt securities and commercial paper 
 
 
 —  
  166,310  
 
 —  
  166,310 
Derivative asset 
 
 
 —  
 
 —  
 
 270  
 
 270 
Total 
 
$ 
 136,452  
$  169,294  
$ 
 270  
$  306,016 
 

F-22 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Fair Value Measurements as of 
 
 
December 31, 2023 using: 
 
     
Level 1 
     
Level 2 
     
Level 3 
     
Total 
Assets: 
 
 
 
 
 
 
 
 
Cash equivalents: 
   
     
     
     
  
Money market funds 
 
  
 40,868  
  
 4,979  
  
 —  
  
 45,847 
Marketable securities: 
 
  
   
  
   
  
   
  
  
Corporate debt securities and commercial paper 
 
 
 —  
  215,765  
 
 —  
  215,765 
Total 
 
$ 
 40,868  
$  220,744  
$ 
 —  
$  261,612 
Liabilities: 
 
 
 
 
 
 
 
 
Derivative liability 
 
$ 
 —  
$ 
 —  
$ 
 1,150  
$ 
 1,150 
Total 
 
$ 
 —  
$ 
 —  
$ 
 1,150  
$ 
 1,150 
 
As of December 31, 2024 and 2023 the carrying amount of cash and cash equivalents and short-term investments 
was $320,565 and $275,846, 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.  
The embedded derivative (asset) or liability associated with our deferred royalty obligation, as discussed further 
in Note 12, “Long-Term Obligations”, is measured at fair value using an option pricing Monte Carlo simulation model 
and is included as a component of the deferred royalty obligation. The embedded derivative (asset) or liability is subject 
to remeasurement at the end of each reporting period, with changes in fair value recognized as a component of other 
(expense) income, net. The assumptions used in the option pricing Monte Carlo simulation model include: (1) our estimates 
of the probability and timing of related events; (2) the probability-weighted net sales of IMCIVREE, including worldwide 
net product sales, upfront payments, milestones and royalties; (3) our risk-adjusted discount rate that includes a company 
specific risk premium; (4) our cost of debt; (5) volatility; and (6) the probability of a change in control occurring during 
the term of the instrument. 
The forward contract associated with our Series A Convertible Preferred Stock, as discussed further in Note 9, 
“Series A Preferred Stock”, is measured at fair value. In order to value the forward contract, a binomial lattice model was 
used to determine the fair value of the Series A Preferred Stock.  The fair value of the forward contract was measured as 
the difference between the consideration payable of $150,000 and the fair value of the Series A Preferred Stock. The fair 
value of the forward contract was determined to be $0 at initial issuance and the change in the fair value from initial 
issuance to settlement of $8,900 was recognized as other income in the condensed consolidated statements of operation 
for the year ended December 31, 2024. The significant assumptions used in the binomial lattice model include: (1) the 
Company’s common stock price on the issuance and settlement dates; (2) the Conversion Price as of $48.00 as per the 
Agreement; (3) a 20-year term to maturity; (4) risk free rates (4.6% - 5%); and (5) volatility (68% and 67%). 
The following tables set forth a summary of the changes in the estimated fair value of our embedded derivative 
liability (asset) (in thousands):  
 
 
 
 
 
 
 
 
 
Year ended 
 
 
December 31, 
 
     
2024 
 
2023 
Beginning aggregate estimated fair value of Level 3 liability (asset) 
 
$ 
 1,150  
$ 
 1,340 
Change in fair value of embedded derivative 
 
 
 (1,420) 
 
 (190)
Fair value of forward contract - Series A Convertible Preferred Stock 
 
 
 8,900  
 
 — 
Settlement of forward contract 
 
 
 (8,900) 
 
 — 
Ending aggregate estimated fair value of Level 3 liability (asset) 
 
$ 
 (270) 
$ 
 1,150 
 
The estimated fair value of the derivative (asset) or liability related to our Royalty Interest Financing Agreement 
(RIFA) with HealthCare Royalty was determined using Level 3 inputs. The fair value measurement of the derivative (asset) 

F-23 
or liability is sensitive to changes in the unobservable inputs used to value the financial instrument. Changes in the inputs 
could result in changes to the fair value of each financial instrument.  
Marketable Securities 
The following tables summarize the Company's marketable securities: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Gross 
 
Gross 
 
 
 
 
 
Amortized 
 
Unrealized 
 
Unrealized 
 
Fair 
 
     
Cost 
     
Gains 
     
Losses 
     
Value 
Assets 
 
 
 
 
 
 
 
 
Corporate debt securities and commercial paper 
(due within 1 year) 
 
$ 
 166,255  
$ 
 147  
$ 
 (92) 
$ 
 166,310 
U.S. Treasury Securities 
 
 
 65,074  
 
 79  
 
 (35) 
 
 65,118 
 
 
$ 
 231,329  
$ 
 226  
$ 
 (127) 
$ 
 231,428 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2023 
 
 
 
 
 
Gross 
 
Gross 
 
 
 
 
 
Amortized 
 
Unrealized 
 
Unrealized 
 
Fair 
 
     
Cost 
     
Gains 
     
Losses 
     
Value 
Assets 
 
 
 
 
 
 
 
 
Corporate debt securities and commercial paper 
(due within 1 year) 
 
$ 
 215,491  
$ 
 282  
$ 
 (7) 
$ 
 215,765 
 
 
$ 
 215,491  
$ 
 282  
$ 
 (7) 
$ 
 215,765 
 
 
6. Intangible Assets, Net 
As of December 31, 2024, the Company’s definite-lived intangible assets, which totaled $6,174, resulted from 
the capitalization of certain milestone payments made to Ipsen Pharma, S.A.S., or Ipsen, in accordance with the terms of 
the Company’s license agreement with Ipsen, in connection with the Company’s first commercial sale of IMCIVREE in 
the U.S. in March 2021.  
As of December 31, 2024, amortization expense for the next five years and beyond is summarized as follows: 
2025 
 
$ 
 854 
2026 
 
 
 855 
2027 
 
 
 854 
2028 
 
 
 855 
2029 
 
 
 855 
Thereafter 
 
  
 1,901 
Total 
 
$ 
 6,174 
 
The Company began amortizing its finite-lived intangible assets in April 2021 over an 11 year period based on 
IMCIVREE’s expected patent exclusivity period. Amortization expense totaled $855, $855 and  $774 for the years ended 
December 31, 2024, 2023 and 2022, respectively. Amortization expense is recorded as a component of cost of sales on the 
consolidated statements of operations and comprehensive loss.   
 
 
 

F-24 
7. Common Stock 
Common Stock 
On February 29, 2024, the Company and Cowen entered into Amendment No. 1 to Sales Agreement (the 
“Amendment”) to increase the aggregate offering price of the shares of common stock that may be issued and sold pursuant 
to the Sales Agreement to $200,000,000 (excluding the aggregate offering price of shares of common stock issued and 
sold pursuant to the Sales Agreement prior to February 29, 2024). In connection with the Amendment, on February 29, 
2024, the Company filed with the Securities Exchange Commission a prospectus supplement, dated February 29, 2024, 
which, combined with the Base Prospectus (together, the “New Prospectus”), amended the Prior Prospectus in its entirety. 
The issuances and sales under the Sales Agreement, as amended by the Amendment, will be made pursuant to the 
Registration Statement and the New Prospectus. 
In the quarter ended December 31, 2024 the Company sold 744,595 shares of common stock in the ATM program 
for net proceeds of $41.2 million.  The Company also sold an additional 587,510 shares of common stock in the ATM 
program through January 21, 2025 for net proceeds of approximately $32.1 million. 
On September 19, 2022, the Company completed a public offering of 4,800,000 shares of common stock at a 
price to the public of $26.00 per share. The Company received $116,887 in net proceeds after deducting underwriting 
discounts, commissions and offering expenses. In addition, the Company granted the underwriters a 30-day option to 
purchase up to an additional 720,000 shares of its common stock at the price to the public, less underwriting discounts and 
commissions. On October 18, 2022, the Company completed the sale of an additional 580,000 shares of common stock at 
a price to the public of $26.00 per share pursuant to the partial exercise of the underwriters’ option to purchase additional 
shares, for aggregate net proceeds of approximately $14,175, after deducting underwriting discounts, commissions and 
offering expenses. 
On November 2, 2021, the Company entered into a Sales Agreement with Cowen and Company, LLC (“Cowen”), 
pursuant to which the Company may issue and sell shares of its common stock, having an aggregate offering price of up 
to $100.0 million, from time to time through an “at the market” equity offering program under which Cowen acts as sales 
agent 
(the 
“ATM 
Program”). 
Between 
August 10, 
2023 
and 
August 21, 
2023, 
the 
Company 
sold 
approximately two million shares of its common stock in the ATM Program for net proceeds of approximately 
$48.9 million. 
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. 
8. Stock-based Compensation 
2017 Equity Incentive Plan 
The Rhythm Pharmaceuticals, Inc. 2017 Equity Incentive Plan (the “2017 Plan”) provides for the grant of 
incentive stock options, non-qualified stock options, stock appreciation rights, performance units, restricted stock awards, 
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 increases on the first day of each calendar 
year, 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, 2025, 2024 
and 2023, 2,495,626, 2,377,062,  and 2,264,497 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.   

F-25 
Shares of common stock issued upon the 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, 2024, an aggregate of 12,475,344 shares of common stock were authorized for issuance 
under the 2017 Plan, of which a total of approximately 4,622,751 shares of common stock remained available for future 
awards. In addition, a total of 7,852,593 shares of common stock reserved for issuance were subject to currently 
outstanding stock options, performance share units and restricted stock units granted under the Plan. 
2022 Inducement Plan 
On February 9, 2022, the Company’s board of directors adopted the Rhythm Pharmaceuticals, Inc. 2022 
Employment Inducement Plan (the “2022 Inducement Plan”), which became effective on such date without stockholder 
approval pursuant to Rule 5635(c)(4) of the Nasdaq Stock Market LLC listing rules (“Rule 5635(c)(4)”). The 2022 
Inducement Plan provides for the grant of non-qualified stock options, stock appreciation rights, performance units, 
restricted stock awards, restricted stock units and stock grants. In accordance with Rule 5635(c)(4), awards under the 2022 
Inducement Plan may only be made to a newly hired employee who has not previously been a member of the Company’s 
board of directors, or an employee who is being rehired following a bona fide period of non-employment by the Company 
or a subsidiary, as a material inducement to the employee’s entering into employment with the Company or its subsidiary. 
An aggregate of 1,000,000 shares of the Company’s common stock have been reserved for issuance under the 2022 
Inducement Plan. 
The exercise price of stock options granted under the 2022 Inducement Plan will not be less than the fair market 
value of a share of the Company’s common stock on the grant date. Other terms of awards, including vesting requirements, 
are determined by the Company’s board of directors and are subject to the provisions of the 2022 Inducement Plan. Stock 
options granted to employees generally vest over a four-year period but may be granted with different vesting terms. 
Certain options may provide for accelerated vesting in the event of a change in control. Stock options granted under the 
2022 Inducement Plan expire no more than 10 years from the date of grant. As of December 31, 2024, there were 495,978 
stock option awards outstanding, 317,554 restricted stock unit awards outstanding and 14,586 shares of common stock 
available for future grant under the 2022 Inducement Plan. 
2017 Employee Stock Purchase Plan 
The Company maintains the Rhythm Pharmaceuticals, Inc. 2017 Employee Stock Purchase Plan, (the “2017 
ESPP”), which became effective in connection with the completion of the Company’s IPO in October 2017.  As of 
December 31, 2024, a total of 1,872,738 shares of common stock were reserved for issuance under the 2017 ESPP. In 
addition, the number of shares authorized under the 2017 ESPP increases on the first day of each calendar year, 
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, 2025, 2024 and 2023, no shares 
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. During the years ended December 31, 2024, 2023 
and 2022, shares of 44,554, 49,819, and 92,932 were issued under the 2017 ESPP.  
 
The purchase price of common stock under our ESPP is equal to 85.0% of the lower of (i) the market value per 
share of the common stock on the first business day of an offering period or (ii) the market value per share of the common 
stock on the purchase date. The fair value of the discounted purchases made under our ESPP is calculated using the Black-

F-26 
Scholes model. The fair value of the look-back provision plus the 15.0% discount is recognized as compensation expense 
over the 6 month purchase period. 
 
Stock Options 
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. The Company bases its estimate of expected volatility using a blend of its stock price history for 
the length of time it has market data for its stock and using 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. 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, 2024, 2023 and 2022, the Company granted 926,543, 842,528, and 
1,929,345 stock option awards pursuant to the 2017 Plan 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 2017 Plan during the years ended December 31, 2024, 2023, and 2022  was $32.69, $17.72, and 
$4.14, respectively.  
During the years ended December 31, 2024, 2023 and 2022, the Company granted 57,100, 229,360, and 347,985 
stock option awards pursuant to the 2022 Inducement Plan.  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, 2024, 2023 and 2022 was $29.16, $15.30, and $13.05, 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: 
 
 
 
 
 
 
 
 
 
 
 
 
 
Year ended 
 
 
December 31,  
 
 
2024 
   
2023 
   
2022 
  
Risk‑free interest rate 
 
 4.29 % 
 2.35 % 
 2.19 % 
Expected term (in years) 
 
 6.13   
 6.11   
 6.11  
Expected volatility 
 
 74.59 % 
 76.11 % 
 69.16 % 
Expected dividend yield 
 
 —   
 —   
 —  
 

F-27 
A summary of the Company's stock option activity for the year ended December 31, 2024 is as follows: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
 
     
 
     
Weighted‑ 
      
 
 
 
 
 
 
 
Weighted- 
 
Average 
  
 
 
 
 
 
 
 
Average 
 
Remaining 
 
Aggregate 
 
 
 
 
Number of  
Exercise 
 
Contractual 
 
Intrinsic 
 
 
 
 
Options 
 
Price 
 
Term 
 
Value 
Outstanding as of December 31, 2023 
   6,551,025  
$ 
 19.19  
 
 7.23 
$ 
 — 
Granted 
  
 983,643  
$ 
 47.17  
  
 — 
$ 
 — 
Exercised 
  
 (818,658) 
$ 
 19.51  
  
 — 
$ 
 24,745 
Cancelled 
  
 (104,619) 
$ 
 20.97  
  
 — 
$ 
 — 
Outstanding as of December 31, 2024 
   6,611,391  
$ 
 23.29  
 
 6.66 
$ 
 216,413 
Options exercisable at December 31, 2024 
   4,578,779  
$ 
 20.36  
 
 5.95 
$ 
 163,090 
 
Restricted Stock Units 
 
The Company may grant restricted stock units (“RSUs”) to employees and nonemployee directors under the 2017 
Plan and to employees under the 2022 Inducement Plan. Each RSU represents a right to receive one share of the Company's 
common stock upon the completion of a specific period of continued service. RSU awards granted are valued at the market 
price of the Company's common stock on the date of grant. The Company recognizes stock-based compensation expense 
for the fair values of these RSUs on a straight-line basis over the requisite service period of these awards. 
A summary of the Company's restricted stock unit activity for the year ended December 31, 2024 is as follows: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted- 
 
 
 
 
 
 
Average 
 
 
 
 
Number of 
 
Grant Date 
 
 
 
     
RSUs 
     
Fair Value 
Unvested as of December 31, 2023 
  
 1,104,607  
$ 
 17.44 
Granted 
  
 1,210,654  
  
 44.22 
Vested 
  
 (321,392) 
  
 15.48 
Cancelled 
  
 (167,160) 
  
 20.08 
Unvested as of December 31, 2024 
  
 1,826,709  
$ 
 36.40 
 
As of December 31, 2024, the aggregate intrinsic value of unvested RSUs was $102,259. 
 
Performance Stock Units  
 
In November 2021, the Company granted a maximum of 956,145 performance stock units (“PSUs”) to employees 
under the 2017 Plan.  Each PSU represents a right to receive one share of the Company's common stock upon vesting.  
The performance-based stock units granted in 2021 vested on December 31, 2023 based upon i) continued service through 
the vesting date and (ii) the achievement of specific clinical development and regulatory performance events, as approved 
by the compensation committee.  PSU awards are valued at the market price of the Company's common stock on the date 
of grant. The Company recognizes stock-based compensation expense for the fair value of these PSUs for the awards that 
are probable of vesting over the service period.  During each financial period, management estimates the probable number 
of PSU’s that would vest until the ultimate achievement of the performance goal is known.  In the year ended December 31, 
2024, 581,346 of the PSUs granted in 2021 vested. 
 
In April 2024, the Company granted a maximum of 340,000 PSUs to employees under the 2017 Plan.  Each PSU 
represents a right to receive one share of the Company's common stock upon vesting. The performance-based stock units 
granted in 2024 will vest annually based on the achievement of the following milestones i) continued service through the 
vesting date, ii) the achievement of annual net product revenue amounts, and iii) the achievement of specific clinical 
development and regulatory performance events, as approved by the compensation committee. The Company  
 
 

F-28 
recognizes stock-based compensation expense for the fair value of these PSUs for the awards that are probable of vesting 
over the service period. The Company granted 249,322 PSU’s as of December 31, 2024. During each financial period, 
management estimates the probable number of PSU’s that would vest until the ultimate achievement of the performance 
goal is known. As of December 31, 2024 none of these PSU’s have vested. 
 
A summary of the Company's performance stock unit activity for the year ended December 31, 2024 is as follows: 
 
 
 
 
 
 
 
Weighted- 
 
 
 
 
 
 
Average 
 
 
 
 
Number of  
Grant Date 
 
 
 
     
PSUs 
     
Fair Value 
Unvested as of December 31, 2023 
  
 581,346  
$ 
 13.24 
Granted 
  
 249,322  
  
 38.92 
Vested 
  
 (581,346) 
  
 40.60 
Cancelled 
  
 —  
  
 — 
Unvested as of December 31, 2024 
  
 249,322  
$ 
 13.24 
 
The following table summarizes the classification of the Company's stock-based compensation expenses related 
to stock options, restricted stock units, performance stock units and the employee stock purchase plan recognized in the 
Company's consolidated statements of operations and comprehensive loss. 
 
 
 
Year Ended 
 
 
December 31,  
 
     
2024 
 
2023 
 
2022 
Research and development 
 
$  10,514  
$  8,449  
$  5,814 
Selling, general, and administrative 
 
   29,168  
   24,104  
   14,017 
Total 
 
$  39,682  
$  32,553  
$  19,831 
 
Stock-based compensation expense by award type recognized during the years ended December 31, 2024 , 2023 
and 2022 was as follows: 
 
 
 
Year Ended 
 
 
December 31,  
 
     
2024 
 
2023 
 
2022 
Stock options 
 
$  21,788  
$  17,671  
$  15,477 
Employees stock purchase plan 
 
 
 538  
 
 581  
 
 408 
Restricted stock units 
 
   16,886  
   5,998  
   2,918 
Performance stock units 
 
 
 470  
 
 8,303  
 
 1,028 
Total 
 
$  39,682  
$  32,553  
$  19,831 
 
As of December 31, 2024, the Company has unrecognized compensation cost of $36,031 related to non-vested 
employee, non-employee and director stock option awards under all equity plans that are expected to be recognized over 
a weighted-average period of 2.04 years. The Company has unrecognized compensation cost of $51,615 related to 
non-vested employee restricted stock unit and performance stock unit awards under all equity plans that are expected to 
be recognized over a weighted-average period of 2.46 years.  

F-29 
9. Series A Convertible Preferred Stock 
On April 1, 2024, the Company entered into the Investment Agreement with certain affiliates of Perceptive 
Advisors LLC (“Perceptive”) and certain other investors (each, an “Investor” and collectively, the “Investors”), relating 
to the issuance and sale of 150,000 shares of a new series of the Company’s Series A Convertible Preferred Stock, par 
value $0.001 per share, titled the “Series A Convertible Preferred Stock” (the “Convertible Preferred Stock”), for an 
aggregate purchase price of $147,750, net of $2,250 of issuance costs, or $1,000 per share (the “Issuance”).  The Issuance 
closed on April 15, 2024.   
The Company determined the obligation to issue 150,000 shares of Convertible Preferred Stock to Perceptive and 
Investors in the future at a set price represented a forward contract which was required to be accounted for at fair value. 
The fair value of the forward contract was measured as the difference between the fair value of the Convertible Preferred 
Stock, as determined using a binomial lattice valuation model, and the consideration payable to the Company. The 
assumptions used in the binomial lattice model include: (1) the Company’s common stock price on the issuance and 
settlement dates; (2) the Conversion Price as of $48.00 as per the Agreement; (3) a 20-year term to maturity; (4) risk-free 
rates; and (5) volatility. The fair value of the forward contract upon issuance was determined to be $0. Upon closing, the 
value of the forward contract was determined to be $8,900 and the fair value of the Convertible Preferred Stock was 
determined to be $141,100. The Convertible Preferred Stock was recorded at its fair value on the Issuance and the change 
in fair value of the forward contract was recorded as other income in its consolidated statement of operations for the year 
ended December 31, 2024. Issuance costs of $2,250 were incurred and recorded as a reduction in the carrying value of the 
Convertible Preferred Stock in the year ended December 31, 2024.   
The Company classifies its Convertible Preferred Stock outside of stockholders’ equity as the redemption of such 
shares is outside the Company’s control. The Company did not adjust the carrying values of the Convertible Preferred 
Stock to redemption value as the shares are not probable of becoming redeemable as of December 31, 2024.  
The Convertible Preferred Stock has the following rights and privileges:  
Liquidation:  
The Series A Preferred Stock will rank senior to the Company’s common stock with respect to the distribution of 
assets upon the Company’s liquidation, dissolution or winding up. 
Upon any liquidation, dissolution or winding-up of the Company, whether voluntary or involuntary 
(“Liquidation”), each holder of Convertible Preferred Stock shall be entitled to receive payment for the greater of (i) 1.75 
multiplied by the sum of the Liquidation Preference (i.e., Initial Liquidation Preference of $1,000 per share plus Paid-in-
Kind (“PIK”) Dividends) plus unpaid Regular Dividends (to the extent such accumulated and unpaid Regular Dividends 
are not included in such Liquidation Preference) or (ii) the amount such holder would have received if the Convertible 
Preferred Stock were fully converted to common stock. If the assets available for distribution are not sufficient to pay the 
holders of the Convertible Preferred Stock pursuant to the preceding sentence, the assets will be distributed ratably to the 
holders of the Convertible Preferred Stock. 
Voting: 
Holders of the Convertible Preferred Stock have the right to vote with the holders of common stock on each 
matter submitted for a vote on an as-converted basis, subject to the terms of the Convertible Preferred Stock as specified 
in the Amended and Restated Certificate of Designations. 
The holders of the Convertible Preferred Stock shall also have certain protective voting rights. Specifically, as 
long as the Convertible Preferred Stock are outstanding, each of the following events require at least a two thirds 
affirmative vote of the Convertible Preferred Stock holders: (a) any amendment or modification of the Certificate of 
Incorporation to authorize or create, or to increase the authorized number of shares of, any class or series of Dividend 
Parity Stock, Liquidation Parity Stock, Dividend Senior Stock or Liquidation Senior Stock, (b) any amendment, 
modification, repeal or waiver of any provision of the Certificate of Incorporation or the Amended and Restated Certificate 

F-30 
of Designations that adversely affects the rights, preferences, privileges or powers of the Convertible Preferred Stock, 
(c) increase or decrease the number of authorized shares of Convertible Preferred Stock or issue additional shares of 
Convertible Preferred Stock, (d) the Company’s consolidation or combination with, or merger with or into, another Person, 
or any binding or statutory share exchange or involving the Convertible Preferred Stock, in each case unless: (i) the 
Convertible Preferred Stock either (x) remains outstanding after such consolidation, combination, merger, share exchange 
or reclassification; or (y) is converted or reclassified into, or is exchanged for, or represents solely the right to receive, 
preference securities of the continuing, resulting or surviving Person of such consolidation, combination, merger, share 
exchange or reclassification, or the parent thereof; (ii) the Convertible Preferred Stock that remains outstanding or such 
preference securities, as applicable, have rights, preferences and voting powers that, taken as a whole, are not materially 
less favorable to the Holders or the holders thereof, as applicable, than the rights, preferences and voting powers, taken as 
a whole, of the Convertible Preferred Stock immediately before the consummation of such consolidation, combination, 
merger, share exchange or reclassification; and (iii) the issuer of the Convertible Preferred Stock that remains outstanding 
or such preference securities, as applicable, is a corporation duly organized and existing under the laws of the United States 
of America, any State thereof or the District of Columbia that, if not the Company, will succeed to the Company under the 
Amended and Restated Certificate of Designations and the Convertible Preferred Stock. 
Redemption: 
The Company has the right to redeem all Convertible Preferred Stock after the Redemption Trigger Date, which 
is the fifth anniversary of the Initial Issue Date of April 15, 2024. The amount payable on the redemption date is equal to 
the Liquidation Preference (i.e., Initial Liquidation Preference of $1,000 per share plus PIK Dividends) plus any unpaid 
Regular Dividends (to the extent such accumulated and unpaid Regular Dividends are not included in such Liquidation 
Preference). 
If a change of control occurs, each holder shall have the right to require the Company to repurchase all, or any 
whole number of shares that is less than all, of the holder’s Convertible Preferred Stock at an amount equal to 1.75 
multiplied by the sum of the Liquidation Preference (i.e., Initial Liquidation Preference of $1,000 per share plus PIK 
Dividends) plus any unpaid Regular Dividends (to the extent such accumulated and unpaid Regular Dividends are not 
included in such Liquidation Preference).  As of December 31, 2024, the Company does not consider a change of control 
to be probable and therefore the Convertible Preferred Stock is not considered redeemable.  
Dividends: 
After the second anniversary, dividends on the Convertible Preferred Stock accrue quarterly, at a 6% annual rate, 
and if not paid out in cash before the quarter end, will become PIK Dividends and added to the liquidation preference, or 
original issue price plus PIK Dividends.  Since dividends do not commence until the second anniversary of the Issuance, 
the Convertible Preferred Stock is considered increasing rate preferred stock. Accordingly, the Company accretes the 
dividends, using the effective interest method, from Issuance to the first contractual call date, April 15, 2029.  The 
Company accrued dividends of $3,970 for the year ended December 31, 2024, as a reduction to Additional Paid-In Capital 
and an increase to the carrying value of Convertible Preferred Stock.  The carrying value of Convertible Preferred Stock 
as of December 31, 2024 is $142,820.  
Conversions:  
Holders of Convertible Preferred Stock have the option to convert any number of whole shares at any time. The 
conversion is based on the sum of the Liquidation Preference plus unpaid Dividends divided by the $48.00 Conversion 
Price. Given the Initial Liquidation Preference of $1,000, each share of Convertible Preferred Stock would be convertible 
into 20.8333 shares of common stock, prior to any adjustments such as PIK Dividends, unpaid Dividends, stock splits, or 
voluntary conversion rate increases. Upon conversion, cash will be paid in lieu of any fractional share of common stock. 
However, based on certain restrictions on the conversion of the Convertible Preferred Stock specified in the Amended and 
Restated Certificate of Designations, a holder of Convertible Preferred Stock is not entitled to effect a conversion of any 
portion of its shares of Convertible Preferred Stock, or to vote in its capacity as a holder of shares of Convertible Preferred 
Stock with respect to matters submitted to holders of the common stock if, after giving effect to such conversion, that 
holder would beneficially own in excess of 4.99%, in the case of one holder, or 9.99%, in the case 
 

F-31 
of the other holder, of the number of shares of common stock outstanding immediately after giving effect to such exercise. 
On May 7, 2024, the Company filed an Amended and Restated Certificate of Designations in respect of the 
Convertible Preferred Stock containing certain technical amendments to the terms of the Convertible Preferred Stock. The 
amendments contained in the Amended and Restated Certificate of Designations (x) limited the voting rights of the 
Convertible Preferred Stock to 24.9438 shares of the Company’s common stock per $1,000 liquidation preference of 
Convertible Preferred Stock and (y) eliminated a 1% step up in the interest rate that otherwise would have applied in the 
unlikely event that the Company was required to obtain and failed to obtain stockholder approval for certain conversion 
shares underlying the Convertible Preferred Stock. 
On July 10, 2024, the Company filed with the SEC a prospectus supplement to the prospectus included in the 
Company’s registration statement on Form S-3ASR filed with the SEC on March 2, 2023, covering the resale from time 
to time by the Investors of up to an aggregate of 3,124,995 shares of common stock, to satisfy registration rights that the 
Company granted to such stockholders in connection with the Issuance. 
10. Significant Agreements 
License Agreements 
RareStone Group Ltd. 
In December 2021, the Company entered into an Exclusive License Agreement with RareStone Group Ltd., or 
the RareStone License. Pursuant to the RareStone License, we granted to RareStone an exclusive, sublicensable, royalty-
bearing license under certain patent rights and know-how to develop, manufacture, commercialize and otherwise exploit 
any pharmaceutical product that contains setmelanotide in the diagnosis, treatment or prevention of conditions and diseases 
in humans in China, including mainland China, Hong Kong and Macao. RareStone has a right of first negotiation in the 
event that the Company chooses to grant a license to develop or commercialize the licensed product in Taiwan. The 
arrangement includes a license and an additional performance obligation to supply product upon the request of RareStone. 
According to the terms of the RareStone License, RareStone has agreed to seek local approvals to commercialize 
IMCIVREE for the treatment of obesity and hyperphagia due to biallelic POMC, PCSK1 or LEPR deficiency, as well as 
Bardet-Biedl and Alström syndromes. Additionally, RareStone has agreed to fund efforts to identify and enroll patients 
from China in the Company’s global EMANATE trial, a Phase 3, randomized, double-blind, placebo-controlled trial to 
evaluate setmelanotide in four independent sub-studies in patients with obesity due to a heterozygous variant of 
POMC/PCSK1 or LEPR; certain variants of the SRCI gene, and certain variants of the SH2B1 gene. In accordance with 
the terms of the RareStone License, RareStone made an upfront payment to Rhythm of $7,000 and issued Rhythm 
1,077,586 ordinary shares. The Company is eligible to receive development and commercialization milestones of up to 
$62,500, as well as tiered royalty payments on annual net sales of IMCIVREE.  
The Company initially estimated the fair value of the RareStone equity to be $2,440 based on a preliminary 
valuation during the first quarter of 2022.  Upon completion of the valuation procedures during the second quarter of 2022, 
the Company concluded the initial fair value of the RareStone equity to be $1,040.  During the third quarter of 2022, the 
Company estimated the fair value of the RareStone equity to be de minimis based upon the results of an updated valuation 
and recorded an other-than-temporary impairment of $1,040 related to the decline in fair value as a component of other 
expense in our consolidated statements of operations and other comprehensive loss for the year ended December 31, 2022.  
The other-than-temporary impairment of $1,040 included the reclassification of a $300 unrealized loss previously recorded 
as a component of accumulated other comprehensive income (loss) in our consolidated statement of stockholders’ equity 
during the second quarter of 2022.  
The Company received total upfront consideration of $8,040 comprised of an upfront payment of $7,000, and the 
estimated fair value of the RareStone equity of $1,040. The Company determined that the RareStone License contains two 
 
 
 

F-32 
performance obligations, the delivery of the license and the supply of clinical and commercial product. The Company 
further determined the supply of commercial product to RareStone contains a significant future discount and estimates the 
discount to be $1,286, which is recorded as a component of deferred revenue on the consolidated balance sheet at 
December 31, 2024. 
Based on a relative fair-value allocation between the license and the manufacture of clinical and commercial 
product, the Company recognized $6,754 of license revenue in the consolidated statements of operations and 
comprehensive loss during the year ended December 31, 2022.  The discount related to commercial manufacturing supply 
will be deferred and recognized over the commercial supply period or upon termination of the agreement.  No license 
revenue was recognized during the years ended December 31, 2023 or 2024. 
On October 28, 2022, we delivered written notice, or the October 2022 Notice, to RareStone that we have 
terminated the RareStone License for cause. In accordance with the October 2022 Notice, we maintain that RareStone has 
materially breached its obligations under the RareStone License to fund, perform or seek certain key clinical studies and 
waivers, including with respect to our global EMANATE trial, among other obligations. On December 21, 2022, 
RareStone provided written notice to us that it objects to the claims in the October 2022 Notice, including our termination 
of the RareStone License for cause.  On March 16, 2023, we provided written notice, or the March 2023 Notice, to 
RareStone reaffirming our position that RareStone has materially breached its obligations under the RareStone License 
and that we have terminated the RareStone License for cause, and also requested documentation supporting RareStone’s 
purported dispute notice objecting to the claims in the October 2022 Notice.   
On May 10, 2023, RareStone provided written notice to the Company reaffirming its objections to the claims in 
our October 2022 Notice and March 2023 Notice, including to the Company’s termination of the RareStone License for 
cause.  On November 29, 2023, RareStone wrote to us seeking to negotiate and execute a commercial supply agreement 
as contemplated under the Exclusive License Agreement, and on January 19, 2024, we responded in writing again 
reaffirming our position that RareStone has materially breached its obligations under the RareStone License and that we 
have terminated the RareStone License for cause.   
Since our last written response in January 2024, we have engaged in discussions with RareStone in an effort to 
reach a resolution, however, we cannot predict whether a resolution will ever be reached. 
Ipsen Pharma S.A.S. 
Pursuant to our March 21, 2013 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 capitalized a $5,000 and $4,000 commercial milestone as a finite-lived intangible asset, as a result 
of the first commercial sales of IMCIVREE in the U.S. and Europe during March 2021 and March 2022, respectively.  
There were no research and development expenses related to milestones recorded in each of the years ended December 31, 
2024, 2023 and 2022.  
Camurus 
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 

F-33 
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.  The Company recorded development milestone expenses related to this license agreement of $1,000 during the 
year ended December 31, 2022. The expenses were recorded as research and development expenses when the milestone 
criteria were met in full during 2022.  There are no research and development expenses related to milestones recorded in 
2023 or 2024. 
11. Long-Term Obligations 
On June 16, 2022, we entered into a RIFA with entities managed by HealthCare Royalty Management, LLC, 
collectively referred to as the Investors. Pursuant to the RIFA and subject to customary closing conditions, the Investors 
have agreed to pay the Company an aggregate investment amount of up to $100,000, or the Investment Amount. Under 
the terms of the RIFA, we received $37,500 on June 29, 2022 upon FDA approval of IMCIVREE in BBS, referred to as 
the Initial Investment Amount, and we received an additional $37,500 on September 29, 2022 of the Investment Amount 
upon EMA approval for BBS.  On September 12, 2023, we received the remaining $24,370 of the Investment Amount, 
net of debt issuance costs, following the achievement of a specified amount of cumulative net sales of IMCIVREE between 
July 1, 2022 and September 30, 2023. 
As consideration for the Investment Amount and pursuant to the RIFA, we agreed to pay the Investors a tiered 
royalty on our annual net revenues, or Revenue Interest, including worldwide net product sales and upfront payments and 
milestones. The applicable tiered percentage will initially be 11.5% on annual net revenues up to $125,000, 7.5% on annual 
net revenues of between $125,000 and $300,000 and 2.5% on annual net revenues exceeding $300,000. If the Investors 
have not received cumulative minimum payments equal to 60% of the amount funded by the Investors to date by March 31, 
2027, or 120% of the amount funded by the Investors to date by March 31, 2029, we must make a cash payment 
immediately following each applicable date to the Investors sufficient to gross the Investors up to such minimum amounts 
after giving full consideration of the cumulative amounts paid by us to the Investors through each date, referred to as the 
Under Performance Payment.  As the repayment of the funded amount is contingent upon worldwide net product sales and 
upfront payments, milestones, and royalties, the repayment term may be shortened or extended depending on actual 
worldwide net product sales and upfront payments, milestones, and royalties.  As of December 31, 2024 we have made 
$20,430 of payments.   
The Investors’ rights to receive the Revenue Interests will terminate on the date on which the Investors have 
received payments equal to a certain percentage of the funded portion of the Investment Amount including the aggregate 
of all payments made to the Investors as of such date, each percentage tier referred to as the Hard Cap, unless the RIFA is 
earlier terminated. The total Revenue Interests payable by us to the Investors is capped between 185% and 250% of the 
Investment Amount paid, dependent on the aggregate royalty paid between 2028 and 2032. If a change of control of occurs, 
the Investors may accelerate payments due under the RIFA up to the Hard Cap plus any other obligations payable under 
the RIFA. 
The repayment period commenced on July 8, 2022 for the Initial Investment Amount, and expires on the earlier 
of (i) the date at which the Investors received cash payments totaling an aggregate of a Hard Cap ranging from 185% to 
250% of the Initial Investment Amount or (ii) the legal maturity date of July 8, 2034.  If the Investors have not received 
payments equal to 250% of the Investment Amount by the twelve-year anniversary of the initial closing date, we will be 
required to pay an amount equal to the Investment Amount plus a specific annual rate of return less payments previously 
received by Investors. In the event of a change of control, we are obligated to pay Investors an amount equal to the Hard 
Cap in effect at the time, ranging from 185% to 250% plus any Under Performance Payment of the Investment Amount 
less payments previously received by Investors. In addition, upon the occurrence of an event of default, including, among 
others, our failure to pay any amounts due to Investors under the deferred royalty obligation, insolvency, our failure to pay 
indebtedness when due, the revocation of regulatory approval of IMCIVREE in the U.S. or our breach of any covenant 
contained in the RIFA and our failure to cure the breach within the prescribed time frame, we are obligated to pay Investors 
an amount equal to the Hard Cap in effect at the time of default ranging from 185% to 250% plus any Under Performance 

F-34 
Payment of the Investment Amount less payments previously received by Investors. In addition, upon an event of default, 
Investors may exercise all other rights and remedies available under the RIFA, including foreclosing on the collateral that 
was pledged to Investors, which consists of all of our present and future assets relating to IMCIVREE. 
We have evaluated the terms of the RIFA and concluded that the features are similar to those of a debt instrument. 
Accordingly, we have accounted for the transaction as long-term debt and presented it as a deferred royalty obligation on 
our consolidated balance sheets. We have further evaluated the terms of the RIFA and determined that the repayment of 
the Hard Cap in effect at the time which ranges from 185% to 250% of the Investment Amount, less any payments made 
to date, upon a change of control is an embedded derivative that requires bifurcation from the debt instrument and fair 
value recognition. We determined the fair value of the derivative using an option pricing Monte Carlo simulation model 
taking into account the probability of change of control occurring and potential repayment amounts and timing of such 
payments that would result under various scenarios, as further described in Note 5, “Fair Value of Financial Instruments” 
to our consolidated financial statements. During the second quarter of 2022, the Company recorded $1,590 for the initial 
fair value of the embedded derivative liability (asset).  The fair value of the embedded derivative liability (asset) was 
($270) and $1,150 as of December 31, 2024 and December 31, 2023, respectively. We will remeasure the embedded 
derivative to fair value each reporting period until the time the features lapse and/or termination of the deferred royalty 
obligation. For the years ended December 31, 2024 and December 31, 2023, we recognized other income of $1,420 and 
$190, due to the remeasurement of the embedded derivative liability. The carrying value of the deferred royalty obligation 
at December 31, 2024 was $109,810 based on $100,000 of proceeds, net of the initial fair value of the bifurcated embedded 
derivative liability upon execution of the RIFA, and debt issuance costs incurred. The carrying value is classified as $1,541 
within current liabilities and $108,269 within long-term liabilities on the consolidated balance sheet as of December 31, 
2024. The carrying value of the deferred royalty obligation approximated fair value at December 31, 2024. The effective 
interest rate as of December 31, 2024 was 16.02%. In connection with the deferred royalty obligation, we incurred debt 
issuance costs totaling $3,287. Debt issuance costs have been netted against the debt and are being amortized over the 
estimated term of the debt using the effective interest method, adjusted on a prospective basis for changes in the underlying 
assumptions and inputs. The assumptions used in determining the expected repayment term of the debt and amortization 
period of the issuance costs requires that we make estimates that could impact the classification of these costs, as well as 
the period over which these costs will be amortized. 
12. Commitments and Contingencies 
Legal Proceedings 
The Company, from time to time, may be party to various litigation arising in the ordinary course of business. 
The Company is not presently subject to any pending or threatened litigation that it believes, if determined adversely to 
the Company, individually, or taken together, would reasonably be expected to have a material adverse effect on its 
business or financial results. 
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 10 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, 2024, the Company does not expect 
to make milestone payments due to third parties during  the  next  12  months  from  the  filing  of  this  Annual  Report 
on  Form 10-K, in connection with our license agreements. These milestones generally become  due  and  payable  upon 
achievement of such milestones or sales and achievement of development milestones.  When the  achievement  of  these  
milestones or sales have not occurred, such contingencies are not recorded in the Company’s consolidated financial 
statements. 
 
 

F-35 
13. Related-Party Transactions 
Expenses paid directly to related parties for the years ended December 31, 2024 and 2023, were immaterial. 
Outstanding payments due to related parties as of December 31, 2024 and December 31, 2023 were immaterial. 
 
14. Income Taxes  
The components of loss before income taxes are as follows: 
 
 
As of 
 
December 31,  
 
2024 
    
2023 
    
2022 
United States 
$ (258,927) $ (178,669) $ (181,119)
Foreign 
 
 (1,329)  
 (5,445)  
 — 
Loss before income taxes 
$ (260,256) $ (184,114) $ (181,119)
 
Components of provision for income taxes are as follows: 
 
 
As of 
 
December 31,  
Current: 
2024 
     
2023 
     
2022 
U.S. Federal 
$ 
 —  $
 —  $ 
 — 
U.S. State and Local 
 
 — 
 
 1 
 
 — 
Foreign 
 
 346 
 
 563 
 
 — 
Total Current Expense 
$ 
 346  $
 564  $ 
 — 
 
  
   
   
Deferred: 
  
   
   
U.S. Federal 
$ 
 —  $
 —  $ 
 — 
U.S. State and Local 
 
 —   
 —   
 — 
Foreign 
 
 —   
 —   
 — 
Total Deferred Expense 
$ 
 —  $
 —  $ 
 — 
 
A reconciliation of the income tax benefit at the federal statutory tax rate to the Company's effective income tax 
rate is as follows: 
 
 
 
 
 
 
 
 
 
 
 
As of 
  
 
 
December 31,  
  
 
     
2024 
     
2023 
   
2022 
   
Statutory tax rate 
  
 21.00 %    21.00 %    21.00 % 
State tax, net of federal benefit 
  
 5.61  
 10.24  
 9.83  
Research and development credit 
  
 0.25  
 0.65  
 0.78  
Orphan drug credit 
  
 3.50  
 3.37  
 2.15  
Stock compensation 
  
 (0.57) 
 (1.37) 
 (0.29) 
Other 
  
 (1.61) 
 (0.16) 
 (0.02) 
Rate changes 
 
 (2.04) 
 (6.52) 
 —  
Executive Compensation 
 
 (2.26) 
 (0.32) 
 (0.01) 
License Agreement 
 
 (1.51) 
 —  
 —  
Change in valuation allowance 
  
 (22.50) 
 (27.10) 
 (33.44) 
Effective tax rate 
  
 (0.13) %   
 (0.21) % 
 — % 
 

F-36 
The principal components of the Company's deferred tax assets and liabilities are as follows: 
 
 
 
 
 
 
 
 
 
 
As of 
 
 
December 31,  
 
     
2024 
     
2023 
Deferred tax assets: 
   
     
  
Net operating loss carryforwards 
 $  167,375  $  153,685 
Research and development credits 
   
 17,604    
 16,139 
Orphan drug credit 
   
 34,603    
 25,484 
Capitalized license fee 
   
 21,661    
 2,311 
Stock-based compensation 
  
 5,113   
 13,159 
Section 174 Costs 
  
 67,624   
 50,688 
Deferred revenue 
  
 336   
 350 
Section 163(j) Interest Limitation 
  
 4,417   
Accrued Expenses & Other 
   
 7,971    
 5,680 
Total deferred tax assets 
    326,704     267,496 
Valuation allowance 
   (325,503)  (267,158)
Net deferred tax assets 
  
 1,201   
 338 
Deferred tax liabilities: 
  
  
Operating lease right-of-use asset and other 
  
 (1,201)  
 (338)
Total deferred tax liabilities 
 $ 
 (1,201) $ 
 (338)
 
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, 2024 and 2023, 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 $58,344 in 2024 and 
$49,901 in 2023 primarily relates to the net loss incurred by the Company during each period. 
As of December 31, 2024, the Company had federal and state net operating loss carryforwards of approximately 
$610,234 and $694,029, 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, 2024, $537,214 can be carried forward indefinitely.  As of December 31, 2024, the 
Company had gross foreign net operating loss carryforwards of approximately $2,566 which have an indefinite 
carryforward period. 
As of December 31, 2024, the Company had federal and state research tax credits of approximately $13,802 and 
$4,812, respectively, which may be used to offset future tax liabilities. Additionally, as of 2024, the Company had a federal 
orphan drug credit related to qualifying research of $34,603. 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 provided U.S. deferred income taxes or foreign withholding taxes on unremitted earnings 
of foreign subsidiaries of approximately $250 as such amounts are considered to be indefinitely reinvested in these 
jurisdictions. The accumulated earnings in the foreign subsidiaries are primarily utilized to fund working capital 

F-37 
requirements as its subsidiaries continue to expand their operations. The amount of any unrecognized deferred tax liability 
related to undistributed foreign earnings is immaterial. 
The Company has not recorded any reserves for uncertain tax positions as of December 31, 2024 and 2023. 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 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.   
Interest and penalty charges, if any, related to unrecognized tax benefits will be classified as provision for income 
taxes in the accompanying statements of operations and comprehensive loss. As of December 31, 2024 and 2023, 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, local, and foreign 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. 
15.  Segment and Geographic 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 currently operates in two business segments, which are U.S. and international 
segments for the development and commercialization of therapies for patients with rare diseases. A single management 
team that reports to the Chief Executive Officer comprehensively manages the entire business. The Company meets the 
aggregation criteria of ASC 280 and therefore has one reportable segment for the year ended December 31, 2024.   
The table below is a summary of the segment profit or loss, including significant segment expenses (in thousands): 
Segment Analysis 
 
 
2024 
 
2023 
 
2022 
 
 
 
 
 
 
 
 
 
 
Net product revenue - U.S. 
 $ 
 96,108  
$ 
 62,425  
$ 
 14,324 
Net product revenue - International 
  
 34,018  
 
 15,002  
 
 2,560 
Total net product revenue 
  
 130,126  
 
 77,428  
 
 16,884 
License revenue 
  
 —  
 
 —  
 
 6,754 
Total net revenue 
  
 130,126  
 
 77,428  
 
 23,638 
 
  
 
 
 
 
 
 
 
Cost of sales 
  
 13,368  
 
 9,302  
 
 2,133 
Global headcount expense 
  
 119,084  
 
 96,413  
 
 70,777 
Preclinical, clinical and development expense 
  
 82,180  
 
 74,465  
 
 66,013 
Commercial & medical affairs 
  
 55,767  
 
 47,905  
 
 41,756 
Corporate, general & administrative 
  
 32,135  
 
 27,154  
 
 20,220 
Other segment expenses 
  
 93,094  
 
 6,571  
 
 1,896 
Other (income) expense, net 
  
 (11,139) 
 
 317  
 
 1,179 
Interest (income) expense, net 
  
 5,893  
 
 (585) 
 
 783 
Income taxes 
  
 346  
 
 564  
 
 (0)
Net loss 
 
$ 
 (260,602) 
$ 
 (184,678) 
$ 
 (181,119)
 

F-38 
Geographic Data 
The Company allocates, for the purpose of geographic data reporting, its revenue based upon the location of its 
customers. Total revenue by geographic area was as follows: 
 
     
Year ended December 31, 
 
     
2024 
     
 
2023 
 
 
2022 
US 
 
$ 
 96,108  
$ 
 62,425  
$ 
 21,078 
International 
 
 
 34,018  
 
 15,003  
 
 2,560 
Total revenues 
 
$ 
 130,126  
$ 
 77,428  
$ 
 23,638 
 
As of December 31, 2024 and 2023, long-lived assets at locations outside the United States were not material. 
16. 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 within the above notes to these consolidated financial statements, and except as described below.  
From January 1, 2025 to January 21, 2025 the Company sold approximately 0.6 million shares of its common 
stock in the ATM Program for net proceeds of approximately $32.1 million. 

Senior 
Management
RHYTHM PHARMACEUTICALS | 2024 ANNUAL REPORT
Board 
of Directors
David Meeker, MD
Chairman
Ed Mathers, 
Lead Director
Partner, New Enterprise 
Associates
Stuart Arbuckle
Executive Vice President 
and Chief Operating Officer, 
Vertex Pharmaceuticals
Camille L. Bedrosian, MD
Chief Medical Officer, 
Amylyx Pharmaceuticals, Inc.
Jennifer Good
President and Chief Executive 
Officer,
Trevi Therapeutics, Inc.
Christophe R. Jean
Strategic Advisor,
Oraxys S.A.
David McGirr
Former Senior Vice President 
and Chief Financial Officer,
Cubist Pharmaceuticals, Inc.
Lynn Tetrault, JD
Former Executive Vice 
President of 
Human Resources 
and Corporate Affairs,
Astra Zeneca, PLC
David Meeker, MD
Chairman, 
President and 
Chief Executive 
Officer
Alastair Garfield
Chief Scientific
Officer
Jennifer Lee
Executive Vice 
President, Head of 
North America
Yann Mazabraud
Executive Vice 
President, Head 
of International
Hunter Smith
Chief Financial 
Officer
Joe Shulman
Chief Technical 
Officer
Pam Cramer
Chief Human 
Resources Officer
Dana Washburn
Senior Vice 
President, Clinical 
Development
Elisabeth 
Crönert-Bendell
Senior Vice President, 
Head of Strategy
Jim Flaherty
Senior Vice 
President and 
General Counsel
Alicia Fiscus
Senior Vice President, 
Global Regulatory 
Affairs
(Appointed April 2025)

Cautionary Note Regarding 
Forward-Looking Statements 
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 forwardlooking. 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 
the safety, efficacy, and regulatory and clinical design or progress of our product candidates and the ability 
of MC4R agonists, including setmelanotide, to treat certain MC4R pathway diseases; the marketing and 
commercialization of IMCIVREE® (setmelanotide), bivamelagon (formerly LB54640), and RM-718, and the timing 
of commercialization, the success, cost and timing of our product development activities and clinical trials, 
the ongoing enrollment of patients in our clinical trials, our expectations surrounding potential regulatory 
submissions, progress, or approvals and timing thereof for any of our product candidates; the estimated market 
size and addressable population for our drug products; and the announcement of data from our clinical trials, 
including from our DAYBREAK and EMANATE trials, and the timing thereof. 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.
Rhythmtx.com 
© 2025, Rhythm Pharmaceuticals, Inc. 
All rights reserved. Rhythm, IMCIVREE, GOLD Academy, 
LEAD for Rare Obesity, Uncovering Rare Obesity, and their 
corresponding logos are trademarks of Rhythm Pharmaceuticals, Inc.