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Curis Inc

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FY2024 Annual Report · Curis Inc
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 
________________________________
FORM 10-K
(Mark One)
☒
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
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
Commission File Number 000-30347
CURIS, INC.
(Exact Name of Registrant as Specified in Its Charter)
Delaware
04-3505116
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer
Identification No.)
128 Spring Street, Building C - Suite 500, Lexington, Massachusetts, 02421
(Address of principal executive offices) (Zip Code)
617-503-6500
(Registrant’s telephone number, including area code)
________________________________
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, $0.01 par value per share
CRIS
Nasdaq Capital 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  x
 
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  x
 
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.    x  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).    x  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. x
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).x
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ☐    No  x
 
The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant (without admitting that any person whose shares 
are not included in such calculation is an affiliate) based on the last reported sale price of the common stock on June 28, 2024 was approximately $40.6 million. 
As of March 27, 2025, there were 8,487,818 shares of the registrant’s common stock outstanding.
DOCUMENTS INCORPORATED BY REFERENCE
Specified portions of the registrant’s proxy statement for the annual meeting of stockholders scheduled to be held on May 20, 2025, which are to be filed 
with the Commission not later than 120 days after the close of the Registrant’s fiscal year ended December 31, 2024 pursuant to Regulation 14A, have been 
incorporated by reference in Items 10-14 of Part III of this Annual Report on Form 10-K.

CURIS, INC.
TABLE OF CONTENTS
Form 10-K
PART I
ITEM 1.
BUSINESS
5
ITEM 1A.
RISK FACTORS
41
ITEM 1B.
UNRESOLVED STAFF COMMENTS
82
ITEM 1C.
CYBERSECURITY
82
ITEM 2.
PROPERTIES
82
ITEM 3.
LEGAL PROCEEDINGS
82
ITEM 4.
MINE SAFETY DISCLOSURES
82
PART II
ITEM 5.
MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS 
AND ISSUER PURCHASES OF EQUITY SECURITIES
82
ITEM 6.
[RESERVED]
83
ITEM 7.
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND 
RESULTS OF OPERATIONS
83
ITEM 7A.
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
93
ITEM 8.
FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
93
ITEM 9.
CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
FINANCIAL DISCLOSURE
115
ITEM 9A.
CONTROLS AND PROCEDURES
115
ITEM 9B.
OTHER INFORMATION
116
ITEM 9C.
DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS
116
PART III
ITEM 10.
DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
116
ITEM 11.
EXECUTIVE COMPENSATION
117
ITEM 12.
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND 
RELATED STOCKHOLDER MATTERS
117
ITEM 13.
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR 
INDEPENDENCE
117
ITEM 14.
PRINCIPAL ACCOUNTANT FEES AND SERVICES
117
PART IV
ITEM 15.
EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
117
ITEM 16.
FORM 10-K SUMMARY
123
SIGNATURES
123
Table of Contents
2

PART I
Cautionary Note Regarding Forward-Looking Statements and Industry Data
This Annual Report on Form 10-K contains forward-looking statements within the meaning of the U.S. Private Securities 
Litigation Reform Act of 1995, which involve risks and uncertainties. All statements other than statements of historical fact 
contained in this Annual Report are statements that could be deemed forward-looking statements, including without limitation 
any statements with respect to the plans, strategies and objectives of management for future operations; statements concerning 
product research, development and commercialization plans, timelines and anticipated results; statements of expectation or 
belief; statements with respect to clinical trials and studies; statements with respect to royalties and milestones; statements with 
respect to the therapeutic potential of drug candidates; expectations of revenue, expenses, earnings or losses from operations, 
or other financial results; and statements of assumptions underlying any of the foregoing. Without limiting the foregoing, the 
words such as “expect(s)”, “believe(s)”, “will”, “may”, “anticipate(s)”, “focus(es)”, “plans”, “mission”, “strategy”, 
“potential”,“estimate(s)”, “opportunity”,“intend”, “project”, “seek”, “should”, “would”, “likelihood”, and similar 
expressions, whether in the negative or affirmative, are intended to identify forward-looking statements, although not all 
forward-looking statements contain these identifying words. Forward-looking statements may include, but are not limited to, 
statements about:
•
the initiation, timing, progress and results of future preclinical studies and clinical trials, and our research and 
development program for emavusertib;
•
our estimates of the period in which we anticipate that existing cash and cash equivalents will enable us to fund our 
current and planned operations;
•
our ability to continue as a going concern;
•
our ability to obtain additional financing; 
•
our ability to establish and maintain collaborations;
•
our plans to develop and commercialize emavusertib;
•
the timing or likelihood of regulatory filings and approvals;
•
the implementation of our business model and strategic plans for our business, drug candidate and technology;
•
our estimates regarding expenses, future revenue and capital requirements;
•
developments and projections relating to our competitors and our industry;
•
our commercialization, marketing and manufacturing capabilities and strategy;
•
the rate and degree of market acceptance and clinical utility of our products;
•
our competitive position; and
•
our intellectual property position.
Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes 
in circumstances that are difficult to predict. Our actual results could differ materially from those anticipated in these forward-
looking statements as a result of various factors. We therefore caution you against relying on any of these forward-looking 
statements. Important factors that could cause actual results to differ materially from those in these forward-looking statements 
include the factors discussed below under the heading “Risk Factor Summary,” and the risk factors detailed further in Item 1A, 
“Risk Factors” of Part I of this Annual Report and in our reports filed with the Securities and Exchange Commission after this 
Annual Report.
This Annual Report includes statistical and other industry and market data that we obtained from industry publications 
and research, surveys, and studies conducted by third parties as well as our own estimates. All of the market data used in this 
Annual Report involve a number of assumptions and limitations, and you are cautioned not to give undue weight to such data. 
Industry publications and third party research, surveys, and studies generally indicate that their information has been obtained 
from sources believed to be reliable, although they do not guarantee the accuracy or completeness of such information. Our 
estimates of the potential market opportunities for emavusertib include several key assumptions based on our industry 
knowledge, industry publications, third party research, and other surveys, which may be based on a small sample size and may 
fail to accurately reflect market opportunities. While we believe that our internal assumptions are reasonable, no independent 
source has verified such assumptions.
The forward-looking statements included in this Annual Report represent our estimates as of the filing date of this Annual 
Report. We specifically disclaim any obligation to update these forward-looking statements in the future. These forward-
looking statements should not be relied upon as representing our estimates or views as of any date subsequent to the date of this 
Annual Report.
Other Information
Unless otherwise indicated, or unless the context of the discussion requires otherwise, we use the terms “we,” “us,” 
“our” and similar references to refer to Curis, Inc. and its subsidiaries, on a consolidated basis. We use the term “Curis” to 
refer to Curis, Inc. on a stand-alone basis.
Table of Contents
3

Risk Factor Summary
Investment in our securities involves risk. You should carefully consider the following summary of what we believe to 
be the principal risks facing our business, in addition to the risks described more fully in Item 1A, “Risk Factors” of Part I of 
this Annual Report on Form 10-K and other information included in this Annual Report. The risks and uncertainties described 
below are not the only risks and uncertainties we face. Additional risks and uncertainties not presently known to us or that we 
presently deem less significant may also impair our business operations. 
If any of the following risks occurs, our business, financial condition, and results of operations and future growth 
prospects could be materially and adversely affected, and the actual outcomes of matters as to which forward-looking 
statements are made in this Annual Report could be materially different from those anticipated in such forward-looking 
statements.
•
We have identified conditions and events that raise substantial doubt about our ability to continue as a going concern.
•
We have incurred substantial losses, expect to continue to incur substantial losses for the foreseeable future and may 
never generate significant revenue or achieve or maintain profitability.
•
We will require substantial additional capital, and if we are unable to raise capital when needed, we could be forced to 
delay, reduce or eliminate our drug development program or commercialization efforts, and our ability to continue 
operations could be adversely affected.
•
We depend heavily on the success of emavusertib, which is still in early clinical development. Clinical trials of 
emavusertib may not be successful. If we are unable to commercialize emauvsertib or experience significant delays in 
doing so, our business will be materially harmed.
•
We have never obtained marketing approval for a drug candidate and we may be unable to obtain, or may be delayed 
in obtaining, marketing approval for emavusertib or any future drug candidates that we, or any future collaborators, 
may develop.
•
We may not be successful in establishing additional strategic collaborations, which could adversely affect our ability to 
develop and commercialize emavusertib. 
•
We rely in part on third parties to conduct clinical trials of emavusertib, and if such third parties perform inadequately, 
including failing to meet deadlines for the completion of such trials, research or testing, then we may not be able to 
successfully develop and commercialize emavusertib and grow our business.
•
Even if we complete the necessary preclinical studies and clinical trials, the marketing approval process is expensive, 
time consuming and uncertain, which may prevent us or any future collaborators from obtaining approvals for the 
commercialization of emavusertib.
•
We face substantial competition, and our competitors may discover, develop or commercialize drugs before or more 
successfully than we do.
•
We may not be able to obtain and maintain patent protection for our technologies and drugs, our licensors may not be 
able to obtain and maintain patent protection for the technology or drugs that we license from them, and the patent 
protection we or they do obtain may not be sufficient to stop our competitors from using similar technology.
•
The alleged events of default, or any future allegations of an event of default, under the Oberland Purchase Agreement 
could have a material adverse effect on our business, financial condition and stock price, including our ability to 
continue as a going concern. 
•
If we are not able to attract and retain key management and scientific personnel and advisors, we may not successfully 
develop emavusertib or achieve our other business objectives.
Table of Contents
4

ITEM 1.
BUSINESS
Overview
We will require substantial funds to maintain our research and development program and support operations in the near 
term. We have incurred losses and negative cash flows from operations since our inception. As of December 31, 2024, we had 
$20.0 million in cash and cash equivalents. In March 2025, we completed a registered direct offering and concurrent private 
placement for net proceeds of approximately $9.0 million. We expect these available cash resources, together with the proceeds 
from the March 2025 offering, to fund our existing operations into the fourth quarter of 2025. We have based this assessment 
on assumptions that may prove to be wrong, and we could exhaust our available capital resources sooner than we expect. 
We will require substantial additional funding in the immediate term to fund the development of emavusertib through 
regulatory approval and commercialization, and to support our continued operations. We will need to seek additional funding 
through a number of potential avenues, including private or public equity financings, collaborations, or other strategic 
transactions. We have faced and expect to continue to face substantial difficulty in raising capital. If sufficient funds are not 
available, we will have to delay, reduce the scope of, or eliminate our research and development program for emavusertib, 
including related clinical trials and operating expenses, potentially delaying the time to market for or preventing the marketing 
of emavusertib, which would adversely affect our business prospects and our ability to continue our operations, and would have 
a negative impact on our financial condition and ability to pursue our business strategies. In addition, we may seek to engage in 
one or more strategic alternatives, such as a strategic partnership with one or more parties, the licensing, sale or divestiture of 
some of our assets or proprietary technologies or the sale of our company, but there can be no assurance that we would be able 
to enter into such a transaction or transactions on a timely basis or on terms favorable to us, or at all. If we are unable to obtain 
sufficient capital, we would be unable to fund our operations and may be required to evaluate alternatives, which could include 
dissolving and liquidating our assets or seeking protection under the bankruptcy laws, and a determination to file for bankruptcy 
could occur at a time that is earlier than when we would otherwise exhaust our cash resources. If we decide to dissolve and 
liquidate our assets or to seek protection under the bankruptcy laws, it is unclear to what extent we would be able to pay our 
obligations, and, accordingly, it is further unclear whether and to what extent any resources would be available for distributions 
to stockholders.
Emavusertib
We are a biotechnology company focused on the development of emavusertib (CA-4948), an orally available, small 
molecule inhibitor of Interleukin-1 receptor associated kinase, or IRAK4. IRAK4 plays an essential role in the toll-like receptor, 
or TLR, and interleukin-1 receptor, or IL-1R, signaling pathways, which are frequently dysregulated in patients with cancer. 
TLRs and the IL-1R family signal through the adaptor protein Myeloid Differentiation Primary Response Protein 88, which 
results in the assembly and activation of IRAK4, initiating a signaling cascade that induces cytokine and survival factor 
expression mediated by the NF-κB protein complex. Many B-cell leukemias and lymphomas are associated with constitutive 
activation of the NF-κB protein complex, which contributes to these cancers' proliferation and survival. The B-cell receptor, or 
BCR, and TLR pathways drive NF-κB activation. Preclinical studies have demonstrated that targeting both the BCR and TLR 
pathways is more synergistic than targeting either pathway alone. Similarly, preclinical studies targeting IRAKi in combination 
with FMS-like tyrosine kinase 3, or FLT3, have demonstrated the ability to overcome the adaptive resistance incurred when 
targeting FLT3 alone. In acute myeloid leukemia, or AML, patient derived xenografts, emavusertib has shown monotherapy 
anti-tumor activity as well as synergy with both azacitidine and venetoclax. In the clinic, emavusertib has shown anti-tumor 
activity across a broad range of hematologic malignancies, including monotherapy activity in AML, particularly those with a 
FLT3 mutation. In non-Hodgkin's lymphoma patients, particularly in primary central nervous system lymphoma, or PCNSL, 
emavusertib has shown anti-tumor activity in combination with a Bruton Tyrosine Kinase, or BTK, inhibitor. 
TakeAim Lymphoma
Emavusertib is currently undergoing testing in combination with ibrutinib, a BTK inhibitor, in a Phase 1/2 open-label, 
single arm expansion trial in patients with relapsed or refractory, or R/R, PCNSL (CA-4948-101, NCT03328078), also known 
as the TakeAim Lymphoma Phase 1/2 study. In June 2022 and December 2023, we provided preliminary clinical data for 
patients with various hematological malignancies in the combination portion of the ongoing TakeAim Lymphoma Phase 1/2 
study. In December 2023, we provided clinical and safety data of emavusertib in combination with ibrutinib in several non-
Hodgkin's lymphoma subtypes, including PCNSL patients. In July and December 2024, emavusertib was granted Orphan Drug 
Designation by the European Commission and the U.S. Food and Drug Administration, or FDA, respectively, for the treatment 
of patients with PCNSL. In September 2024 and March 2025, we provided additional clinical data of emavusertib in 
combination with ibrutinib in R/R PCNSL. We expect additional data from this study in the fourth quarter of 2025.
In March 2025, we announced that we had completed productive meetings with both the European Committee for 
Medicinal Products for Human Use, or CHMP, and the FDA on the suitability of using the ongoing TakeAim Lymphoma Phase 
1/2 study to support a potential accelerated regulatory path for a Conditional Marketing Authorization, or CMA, submission in 
Europe and a New Drug Application, or NDA, submission in the U.S.   
 
 
 
 
 
 
 
For submission in Europe, we engaged CHMP for scientific advice on the potential for CMA submission, with the 
following feedback:
Table of Contents
5

•
Current, single-arm, study could support a CMA;
•
Primary endpoint of Overall Response Rate, or ORR, for a single-arm study is supported; 
•
45 patients may be sufficient to support a CMA, assuming compelling and consistent results; 
•
Due to the rarity of disease the proposed size of the safety database may be acceptable and will be a review issue for 
CMA; and
•
Contribution of effect of each of emavusertib and ibrutinib as well as the emavusertib/ibrutinib combination in a 
BTKi-naïve population is required for CMA.
For submission in the U.S., we discussed with FDA the potential for an NDA submission for Accelerated Approval based 
on the lack of approved treatments, with the following feedback:
•
Current, single-arm, study could support a submission for Accelerated Approval;
•
ORR, supported by adequate duration of response, could be acceptable for Accelerated Approval; 
•
The number of patients needed to support safety and efficacy is a review issue, which is part of the NDA submission 
process; and
•
An analysis of 100 mg vs 200 mg emavusertib dosing and contribution of effect of emavusertib, ibrutinib, and the 
emavusertib/ibrutinib combination in a BTKi-naïve population is required prior to NDA submission.
Both the CHMP and FDA encouraged us to continue discussions to align on the confirmatory study design, which is 
required prior to the CMA or NDA submission.
TakeAim Leukemia
In addition to the TakeAim Lymphoma Phase 1/2 study, emavusertib is currently undergoing testing in a Phase 1/2 open-
label, single arm expansion trial in patients with R/R AML and high-risk myelodysplastic syndromes, or hrMDS 
(CA-4948-102, NCT04278768), also known as the TakeAim Leukemia Phase 1/2 study. In January and December 2022, July 
and December 2023, and May and December 2024, we presented clinical data for patients from the ongoing TakeAim 
Leukemia Phase 1/2 study. Enrollment in the TakeAim Leukemia study is substantially complete.
AML Triplet Study
We have initiated a Phase 1 clinical study of emavusertib as an add-on agent to the combination of azacitidine and 
venetoclax in AML (CA-4948-104, 2023-505828-58), which we refer to as the AML Triplet study. The AML Triplet study is 
currently being conducted in Spain, Germany, and Italy. The study is assessing the safety and tolerability of different dosing 
regimens of emavusertib in the triple combination in patients who achieved a complete remission on venetoclax and azacitidine, 
while remaining positive for minimal residual disease. To date, the trial has enrolled the first dosing cohort of emavusertib in 
combination with azacitidine and venetoclax. All patients in this cohort tolerated the triple regimen well, with no unexpected 
adverse events. As a result, the external Clinical Safety Review Committee recommended to escalate to the next dosing cohort, 
and enrollment for this cohort is currently ongoing.
Other Clinical Programs
Our pipeline also includes several pre-clinical and clinical compounds which we deprioritized to enable us to focus our 
available resources on the continued development of emavusertib.
Outlicensed Programs
Erivedge
Erivedge, a first-in-class orally administered small molecule Hedgehog signaling pathway antagonist, is approved by the 
FDA for the treatment of adults with metastatic basal cell carcinoma, or BCC, or with locally advanced BCC that has recurred 
following surgery or who are not candidates for surgery, and who are not candidates for radiation. Erivedge is being 
commercialized globally under a collaborative research, development, and license agreement with Genentech Inc., a member of 
the Roche Group, or Genentech. Erivedge is currently marketed and sold in the U.S. by Genentech, and in the European Union, 
Australia and several other countries by Roche.
For the years ended December 31, 2024 and 2023, royalty payments from Genentech accounted for $10.9 million and 
$9.9 million, or 100% and 99% of our gross revenues, respectively. During both of the years ended December 31, 2024 and 
2023, 88% of our cash receipts associated with Erivedge reverted to the purchasers under the Oberland Purchase Agreement, 
described below.
For a further discussion of our Hedgehog collaborative research, development, and license agreement with Genentech, see 
“Our Collaborations and License Agreements — Genentech.”
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6

CA-170
CA-170 is an oral small molecule drug candidate that targets V-domain Ig Suppressor of T-cell Activation, or VISTA, and 
PDL1 immune checkpoint proteins, both of which independently function as negative regulators of immune activation. Our 
collaboration partner, Aurigene Discovery Technologies Limited, now known as Aurigene Oncology Limited, or Aurigene, is 
conducting a Phase 2b/3 randomized study evaluating CA-170 in combination with chemoradiation. 
For a further discussion of our collaborative research, development, and license agreement with Aurigene, see “Our 
Collaborations and License Agreements — Aurigene.”
Our Collaborations and License Agreements
Aurigene
In January 2015, we entered into an exclusive collaboration agreement with Aurigene for the discovery, development and 
commercialization of small molecule compounds in the areas of immuno-oncology and precision oncology worldwide, except 
for India and Russia, which are territories retained by Aurigene. We currently have three licensed programs under the Aurigene 
collaboration, including the IRAK4 program under which we are developing emavusertib. 
In September 2016, we and Aurigene entered into an amendment to the collaboration agreement. Under the terms of the 
amendment, in exchange for the issuance of our common stock, Aurigene waived payment of up to a total of $24.5 million in 
potential milestones and other payments associated with the first four programs in the collaboration that may have become due 
from us under the collaboration agreement. To the extent any of these waived milestones or other payments are not payable by 
us, for example in the event one or more of the milestone events do not occur, we will have the right to deduct the unused 
waived amount from any one or more of the milestone payment obligations tied to achievement of commercial milestone 
events. The amendment also provides that, in the event supplemental program activities are performed by Aurigene, we will 
provide up to $2.0 million of additional funding for each of the two licensed programs besides the IRAK4 licensed program. 
In February 2020, we and Aurigene further amended the collaboration agreement. Under the terms of the amended 
agreement, Aurigene expanded its rights to develop and commercialize CA-170 to Asia and will conduct a Phase 2b/3 
randomized study evaluating CA-170, in combination with chemoradiation, in approximately 240 patients with non-squamous 
non-small cell lung cancer. In September 2024, the collaboration agreement was further amended to expand Aurigene's rights to 
develop and commercialize CA-170 worldwide. We are entitled to receive royalty payments on potential future sales of CA-170 
at percentage rates ranging from the high single digits up to 10%, subject to specified reductions. In addition, we are entitled to 
receive a low double-digit percentage of Aurigene’s sublicensing revenues subject to specified reductions.
We currently have licensed the following programs under the collaboration: 
•
IRAK4 Program - a precision oncology program of small molecule inhibitors of IRAK4. The development 
candidate is emavusertib.
•
PD1/TIM3 Program - an immuno-oncology program of small molecule antagonists of PD1 and TIM3 immune 
checkpoint pathways. The development candidate is CA-327.
•
An immuno-oncology program.
For each of the IRAK4, PD1/TIM3, and the immuno-oncology programs, we are obligated to use commercially 
reasonable efforts to develop, obtain regulatory approval for, and commercialize at least one product in each of the U.S., 
specified countries in the European Union and Japan. Aurigene is obligated to use commercially reasonable efforts to perform 
its obligations under the development plan for its licensed programs.
For each of the IRAK4, PD1/TIM3, and the immuno-oncology programs, we have remaining unpaid or unwaived 
payment obligations of $42.5 million per program, related to regulatory approval and commercial sales milestones, plus 
specified additional payments for approvals for additional indications, if any. 
We have agreed to pay Aurigene tiered royalties on our and our affiliates’ annual net sales of products at percentage rates 
ranging from the high single digits up to 10%, subject to specified reductions.
We have agreed to make certain payments to Aurigene upon our entry into sublicense agreements on any program(s), 
including:
•
with respect to amounts that we and our affiliates receive from sublicensees under a licensed program in the U.S. or 
the European Union, a declining percentage of non-royalty sublicense revenues that is dependent on the stage of the 
most advanced product for such licensed program at the time the sublicense is granted, including, for example 25% of 
such amounts following the earlier of (1) initiation of the first Phase 2 trial and (2) determination by us that human 
proof-of-concept has been established in any indication and 15% of such amounts after initiation of the first pivotal 
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7

study. This sharing will also extend to royalties that we receive from sublicensees, subject to minimum royalty 
percentage rates that we are obligated to pay to Aurigene, which generally range from mid-to-high single-digit royalty 
percentage rates up to 10%;
•
with respect to sublicensing revenues we and our affiliates receive from sublicensees under a licensed program in 
Asia, 50% of such sublicensing revenues, including both non-royalty sublicensee revenues and royalties that we 
receive from sublicensees; and
•
with respect to non-royalty sublicensing revenues we and our affiliates receive from sublicensees under a licensed 
program outside of the U.S., the European Union and Asia, a percentage of such non-royalty sublicense revenues 
ranging from 30% to 50%. We are also obligated to share 50% of royalties that we receive from sublicensees that we 
receive in these territories.
Our royalty payment obligations (including those on sales by sublicensees) under the collaboration agreement with respect 
to a product in a country will expire on a product-by-product and country-by-country basis on the later of: (i) expiration of the 
last-to-expire valid claim of the Aurigene patents covering the manufacture, use or sale of such product in such country; and 
(ii) 10 years from the first commercial sale of such product in such country.
The term of the collaboration agreement began upon signing and, unless earlier terminated, will expire upon either: (i) 90 
days after the completion by Aurigene of its obligations under all research plans if we have not exercised the option with 
respect to at least one program by such time; or (ii) expiration of the last-to-expire royalty term for any and all products. Upon 
expiration (but not on earlier termination) of the collaboration agreement, all licenses granted by Aurigene to us that were in 
effect immediately prior to such expiration shall survive on a non-exclusive, royalty-free, fully paid, irrevocable, perpetual 
basis.
The collaboration agreement may be terminated, either in its entirety or with respect to a particular program, by either 
Aurigene or us for uncured material breach by the other party, other than an uncured material breach by the other party of its 
diligence obligations with respect to a program or licensed program. If an uncured material breach other than a diligence breach 
relates to a particular program or licensed program, the non-breaching party may terminate the collaboration agreement only 
with respect to that program or licensed program. However, after initiation of the first pivotal clinical trial of a product for a 
licensed program, Aurigene may not terminate the collaboration agreement with respect to such licensed program for an 
uncured non-diligence breach by us, except in the case of our uncured material breach of our payment obligations with respect 
to such licensed program, but Aurigene may pursue any and all remedies that may be available to it at law or in equity as a 
result of such breach. Similarly, after initiation of the first pivotal clinical trial of a product for a licensed program, we may not 
terminate the collaboration agreement with respect to the license we have granted Aurigene for its territory of India and Russia 
for such licensed program for an uncured non-diligence breach by Aurigene, but we may pursue any and all remedies that may 
be available to us at law or in equity as a result of such breach.
On a program-by-program basis, we may terminate the collaboration agreement as it relates to a program or licensed 
program for an uncured breach by Aurigene with respect to such program or licensed program, and Aurigene may terminate the 
collaboration agreement as it relates to a licensed program for an uncured breach by us with respect to such licensed program.
In addition, we may terminate the collaboration agreement in its entirety or as it relates to a particular program or licensed 
program or on a country-by-country basis, for any reason or for no reason at any time upon 60 days’ prior written notice to 
Aurigene.
In the event of termination of the collaboration agreement in its entirety before we have exercised the option for any 
program, or termination of the collaboration agreement as it relates to any program prior to exercise of the option for such 
program, all rights and licenses granted by either Aurigene or us to the other party with respect to such program under the 
collaboration agreement (including the option for such program) will automatically terminate.
If the royalty term with respect to a product for any licensed program in any country has expired on or before any 
termination of the collaboration agreement in its entirety or as to such licensed program, the license granted by Aurigene to us 
with respect to such product in such country, as well as the corresponding license granted to Aurigene in its territory, shall 
survive such termination of the collaboration agreement.
Solely in the event of termination of the collaboration agreement by Aurigene for our uncured breach, or our termination 
of the collaboration agreement for convenience, the following will apply to any program that was a licensed program 
immediately prior to such termination:
•
our license with respect to any licensed program that is not a terminated program (defined below), either in our entire 
territory or in countries within our territory outside of the terminated region (defined below), as applicable, shall 
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continue in full force and effect, subject to all terms and conditions of the collaboration agreement, including our 
payment obligations;
•
our license with respect to any terminated program, either in our entire territory or in the terminated region, as 
applicable, shall terminate and revert to Aurigene;
•
we will grant Aurigene a perpetual, royalty-free (except for pass-through royalties and milestone payments payable 
by us under licenses to third party patent rights with respect to products developed or commercialized by or on behalf 
of Aurigene) license, with the right to sublicense, under our relevant patent rights and other technology solely to 
develop, manufacture and commercialize compounds and products for any terminated program, either in our entire 
territory or in the terminated region, as applicable. The foregoing license will be non-exclusive with respect to our 
patent rights and exclusive with respect to our other technology;
•
we will grant to Aurigene a right of first negotiation, exercisable within 90 days after termination, to obtain an 
exclusive, royalty-bearing license, with the right to sublicense, under our relevant patent rights solely to develop, 
manufacture and commercialize compounds and products for any terminated program, either in our entire territory or 
in the terminated region, as applicable, upon commercially reasonable terms and conditions to be negotiated in good 
faith by the parties;
•
we will perform other specified activities and actions reasonably necessary for Aurigene to develop, manufacture and 
commercialize compounds and products for any terminated program, either in our entire territory or in the terminated 
region, as applicable; and
•
the applicable license to Aurigene will survive termination.
For purposes of the foregoing, “terminated program” means: (i) in the case of termination of the collaboration agreement 
in its entirety by Aurigene for our uncured non-diligence breach, any program that was a licensed program immediately prior to 
such termination, but excluding, except in the case of our uncured material breach of our payment obligations with respect to 
such licensed program, any such licensed program for which initiation of the first pivotal clinical trial of a product has occurred 
prior to such termination; (ii) in the case of any termination of the collaboration agreement as to a particular licensed program 
by Aurigene either for our uncured non diligence breach (to the extent termination as to such licensed program is permitted) or 
our uncured diligence breach, such licensed program; (iii) in the case of our termination of the collaboration agreement in its 
entirety for convenience, any program that was a licensed program immediately prior to such termination; or (iv) in the case of 
our termination of the collaboration agreement as to a particular licensed program for convenience, such licensed program; 
provided, however, that, in the case of the preceding clauses (iii) and (iv), if our termination of the collaboration agreement in 
its entirety or as to a particular licensed program for convenience was with respect only to a particular country or subset of 
countries within the entire territory as applicable, a terminated region, the applicable licensed program(s) shall be considered 
“terminated program(s)” only in the terminated region but shall remain licensed program(s) in the rest of our territory.
Genentech
In 2003, we entered into a collaborative research, development and license agreement with Genentech, which we refer to 
as the collaboration agreement.
Under the terms of our collaboration agreement with Genentech, we granted Genentech an exclusive, global, royalty-
bearing license, with the right to sublicense, to make, use, sell and import molecules capable of inhibiting the Hedgehog 
signaling pathway (including small molecules, proteins and antibodies) for human therapeutic applications, including cancer 
therapy. Genentech subsequently granted a sublicense to Roche for non-U.S. rights to Erivedge other than in Japan where such 
rights are held by Chugai. Genentech and Roche are responsible for worldwide clinical development, regulatory affairs, 
manufacturing and supply, formulation, and sales and marketing of Erivedge.
We are eligible to receive up to an aggregate of $115.0 million in contingent cash milestone payments, exclusive of 
royalty payments, in connection with the development of Erivedge or another small molecule Hedgehog pathway inhibitor, 
assuming the successful achievement by Genentech and Roche of specified clinical development and regulatory objectives. Of 
this amount, we have received $59.0 million to date. 
In addition to the contingent cash milestone payments, our wholly owned subsidiary, Curis Royalty, LLC, or Curis 
Royalty, is entitled to a royalty on net sales of Erivedge that ranges from 5% to 7.5% based upon global Erivedge sales by 
Roche and Genentech. The royalty rate applicable to Erivedge may be decreased by 2% on a country-by-country basis in certain 
specified circumstances, including when a competing product that binds to the same molecular target as Erivedge is approved 
by the applicable country’s regulatory authority in another country and is being sold in such country by a third party for use in 
the same indication as Erivedge, or when there is no issued intellectual property covering Erivedge in a territory in which sales 
are recorded. During the third quarter of 2015, the FDA and the CHMP approved another Hedgehog signaling pathway 
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inhibitor, Odomzo® (sonidegib), which is marketed by Sun Pharmaceutical Industries Ltd., for use in locally advanced BCC. 
Accordingly, Genentech has reduced royalties to Curis Royalty on its net sales in the United States of Erivedge by 2% since the 
fourth quarter of 2015, and we anticipate that Genentech will reduce by 2% royalties on net sales of Erivedge outside of the 
United States on a country-by-country basis to the extent that sonidegib is approved by the applicable country’s regulatory 
authority and is being sold in such country. However, pursuant to the Oberland Purchase Agreement described below, we have 
retained our rights with respect to the 2% of royalties that are subject to such reduction in countries where such reduction may 
or has occurred, subject to the terms and conditions of the Oberland Purchase Agreement, which we refer to as the “Retained 
Royalty Amounts”. 
As a result of our licensing agreements with various universities, we are also obligated to make payments to university 
licensors on royalties that Curis Royalty earns in eligible territories in an amount that is equal to 5% of the royalty payments 
received from Genentech. This obligation endures on a country-by-country basis for a period of 10 years from the first 
commercial sale of Erivedge on a country-by-country basis, and the first U.S. sale occurred in February 2012. During the year 
ended December 31, 2022, our obligation to one of the licensors expired for sales in the U.S. and expired entirely for the other 
licensor.
Unless terminated earlier, the collaboration agreement will expire six months after the later of the expiration of 
Genentech’s obligation to pay royalties to us under the collaboration agreement or such time as no activities have occurred 
under the collaboration agreement for a period of twelve months. The collaboration agreement may be terminated earlier by 
either party for cause upon sixty days prior written notice. In addition, Genentech may terminate the collaboration agreement, 
either in whole or in part, without cause, upon six months prior written notice. In the event of any termination where specific 
license grants survive, we will continue to have the right to receive royalties on product sales for Erivedge. If we terminate the 
collaboration agreement for cause or Genentech terminates the collaboration agreement without cause, all licenses granted to 
Genentech automatically terminate and revert to us. In addition, Genentech has agreed that it will no longer conduct any 
development or commercialization activities on any compounds identified in the course of conducting activities under the 
research plan for the collaboration agreement for so long as such compounds continue to be covered by valid patent claims.
Transactions Related to Erivedge Royalties
In March 2019, we and Curis Royalty entered into a royalty interest purchase agreement, referred to as the Oberland 
Purchase Agreement, with TPC Investments I LP and TPC Investments II LP, referred to as the Purchasers, each of which is a 
Delaware limited partnership managed by Oberland Capital Management, LLC, and Lind SA LLC, referred to as the Agent, a 
Delaware limited liability company managed by Oberland Capital Management, LLC, as collateral agent for the Purchasers, for 
the purpose of providing operating cash flow and extinguishing a previous credit agreement. In connection with entering into 
the Oberland Purchase Agreement, Curis Royalty and the Agent also entered into a security agreement, we and the Agent 
entered into a pledge agreement and we and Curis Royalty entered into a consent and payment direction letter agreement with 
Genentech.
Pursuant to the Oberland Purchase Agreement, the Purchasers acquired the rights to a portion of certain royalty and 
royalty-related payments excluding a portion of non-U.S. royalties retained by Curis Royalty, referred to as the Purchased 
Receivables, owed by Genentech under our collaboration agreement with Genentech. Upon closing of the Oberland Purchase 
Agreement, Curis Royalty received an upfront purchase price of $65.0 million from the Purchasers, approximately $33.8 
million of which was used to pay off the remaining loan principal under the credit agreement with HealthCare Royalty Partners 
III, L.P., or HealthCare Royalty, and $3.7 million of which was used to pay transaction costs, including $3.4 million to 
HealthCare Royalty in accrued and unpaid interest and prepayment fees under the credit agreement, resulting in net proceeds of 
$27.5 million. Curis Royalty will also be entitled to receive milestone payments of $53.5 million if the Purchasers receive 
payments pursuant to the Oberland Purchase Agreement in excess of $117.0 million on or prior to December 31, 2026, which 
milestone payments may each be paid, at the option of the Purchasers, in a lump sum in cash or out of the Purchasers' portion of 
future payments under the Oberland Purchase Agreement.
Pursuant to the terms of the Oberland Purchase Agreement, so long as an event of default by Curis Royalty has not 
occurred under the security agreement, royalty and royalty-related payments owed by Genentech under the Genentech 
collaboration agreement in each calendar year shall be allocated in the following order: (1) Curis Royalty shall receive 
payments reflecting the Retained Royalty Amounts, as defined above, to the extent actually paid by Genentech under the 
Genentech collaboration agreement, (2) Curis Royalty shall receive payments to satisfy Curis’ royalty obligations to certain 
academic institutions subject to a specified percentage cap and/or a specified period of time, (3) Curis Royalty shall receive a 
fixed amount of payments to reimburse intellectual property and other enforcement costs, whether or not actually incurred by 
us, (4) the Purchasers shall receive 100% of all payments up to $13.2 million in the aggregate in such calendar year, and (5) any 
additional payments in such calendar year shall be paid 65% to Curis Royalty and 35% to the Purchasers.
The Oberland Purchase Agreement also provides that, so long as an event of default by Curis Royalty has not occurred 
under the security agreement, if Curis Royalty recovers any monetary award or settlement or any other non-ordinary course 
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lump sum payment made in respect of the royalty and royalty-related payments owed by Genentech under the Genentech 
collaboration agreement that does not specifically relate to any calendar period, then such payment or other recovery shall be 
allocated in the following order: (1) Curis Royalty shall receive payments to satisfy Curis’ royalty obligations to certain 
academic institutions up to a specified percentage cap, (2) the Purchasers shall receive 100% of all such payments up to an 
amount equal to the product of $13.2 million and the number of full calendar years, and any fraction thereof, in the period 
beginning on the first day of the calendar quarter in which such payment or other recovery is received and ending on December 
31, 2028, subject to certain exceptions, and (3) any additional payment shall be paid 65% to Curis Royalty and 35% to the 
Purchasers. Following an event of default under the security agreement, the Agent has the right to stop all allocations of 
payments that would have otherwise been allocated to Curis Royalty pursuant to the foregoing two paragraphs and instead 
retain all such payments.
In addition, the Oberland Purchase Agreement provides that after the occurrence of an event of default by Curis Royalty 
under the security agreement, as described below, the Purchasers shall have the option, for a period of 180 days, to require 
Curis Royalty to repurchase the Purchased Receivables at a price, referred to as the Put/Call Price, equal to 250% of the sum of 
the upfront purchase price and any portion of the milestone payments paid in a lump sum by the Purchasers, if any, minus 
certain payments previously received by the Purchasers with respect to the Purchased Receivables. Additionally, Curis Royalty 
shall have the option at any time to repurchase the Purchased Receivables at the Put/Call Price as of the date of such repurchase. 
The Oberland Purchase Agreement will terminate upon the earlier to occur of (i) the date on which Curis Royalty’s rights 
to receive the Purchased Receivables owed by Genentech under the Genentech collaboration agreement have terminated in their 
entirety or (ii) the date on which payment in full of the Put/Call Price is received by the Purchasers pursuant to the Purchasers’ 
exercise of their put option or Curis Royalty’s exercise of its call right as described above.
Pursuant to the security agreement, Curis Royalty granted to the Agent a first priority lien and security interest in all of its 
assets and all real, intangible and personal property, including all of its right, title and interest in and to the Erivedge royalty 
payments. The security interest secures the obligations of Curis Royalty arising under the Oberland Purchase Agreement, the 
security agreement or otherwise with respect to the due and prompt payment of (i) an amount equal to the Put/Call Price and (ii) 
all fees, costs, expenses, indemnities and other payments of Curis Royalty under or in respect of the Oberland Purchase 
Agreement and the security agreement. Additionally, in connection with the transaction, Curis granted to the Agent a first 
priority lien and security interest of Curis’ equity interest in Curis Royalty pursuant to a pledge agreement.
Corporate Information
We were organized as a Delaware corporation in February 2000. We began our operations in July 2000 upon the 
completion of the merger of Creative BioMolecules, Inc., Ontogeny, Inc. and Reprogenesis, Inc. Our principal executive office 
is located at 128 Spring Street, Building C – Suite 500, Lexington, MA 02421 and our telephone number is (617) 503-6500.
Curis® and the Curis logo are trademarks or registered trademarks of Curis, and Erivedge® is a trademark of Genentech. 
This Annual Report on Form 10-K may also contain trademarks and trade names of others.
Website Access to Reports
We maintain a website with the address www.curis.com. We are not including the information contained in our website as 
part of, or incorporating it by reference into, this Annual Report on Form 10-K. Our website address is included in this Annual 
Report on Form 10-K as an inactive textual reference only. We make available free of charge through our website our Annual 
Reports on Form 10-K, our quarterly reports on Form 10-Q, our current reports on Form 8-K and any such amendments to 
those reports as soon as reasonably practicable after we electronically file such material with, or furnish such material to, the 
Securities and Exchange Commission, or SEC. The SEC maintains a website, www.sec.gov, that contains reports, proxy and 
information statements and other information regarding issuers that file electronically with the SEC. In addition, we provide 
paper copies of our filings free of charge upon request. We also make available on our website our corporate governance 
guidelines, the charters for our audit committee, compensation committee and nominating and corporate governance committee, 
and our code of business conduct and ethics, and such information is available in print to any stockholder of Curis who requests 
it.
Intellectual Property
Our policy is to obtain and enforce the patents and proprietary technology rights that are key to our business. We intend to 
continue to file U.S. and foreign patent applications to protect technology, inventions and improvements that are considered 
important to the development of our business. We will be able to protect our proprietary technologies from unauthorized use by 
third-parties only to the extent that our proprietary rights are covered by valid and enforceable patents or are effectively 
maintained as trade secrets.
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In the U.S., as of December 31, 2024, we have 55 issued or allowed patents expiring on various dates between 2025 and 
2042 as well as numerous pending patent applications. We have foreign counterpart patent filings for most of our U.S. issued 
patents and patent applications. These patents and patent applications are directed to various inventions including compositions 
of matter, methods of making and using these compositions for multiple applications, methods for drug screening and 
discovery, and patents which relate to our proprietary technologies.
Emavusertib. In conjunction with the October 2015 exercise of our option to license the IRAK-4 program, we obtained 
world-wide (except for India and Russia) exclusive licenses to the Aurigene intellectual property relevant to the program. The 
portfolio consists of U.S. and foreign filings which cover emavusertib and related IRAK-4 inhibitory compounds and methods 
of use thereof. As of December 31, 2024, there are 9 issued or allowed U.S. patents expiring between 2035 and 2042 included 
in such filings.
Other Aurigene Collaboration Programs. In conjunction with the October 2016 exercise of our option to license the PD-
L1/TIM3 program under our collaboration with Aurigene and the March 2018 exercise of our option to the fourth program in 
immuno-oncology, we obtained world-wide (except for India and Russia) exclusive licenses to the Aurigene intellectual 
property relevant to the program. The portfolio consists of U.S. and foreign filings which cover various genera of compounds 
from each program and methods of use thereof. As of December 31, 2024, there are 10 issued U.S. patents expiring between 
2034 and 2038 included in such filings.
Fimepinostat and other Targeted Drug Candidates. As of December 31, 2024, we have 27 issued U.S. patents that expire 
on various dates between 2028 and 2039, including patents covering the composition of matter for fimepinostat, which expires 
in 2032. We also have several U.S. and foreign utility patent applications directed to our novel small molecules. Our patents 
and patent applications cover compositions of matter, methods of manufacturing these molecules, formulations, and methods of 
using these molecules to treat a variety of therapeutic indications. We intend to continue to file additional U.S. and foreign 
applications as the programs progress.
Erivedge and the Hedgehog Signaling Pathway. As of December 31, 2024, we have 9 issued U.S. patents expiring on 
various dates between 2025 and 2036, which relate to the Hedgehog signaling pathway, including patents covering Erivedge’s 
composition of matter, which expire in 2028. Our patents and patent applications cover certain small molecule agonists and 
inhibitors of the Hedgehog signaling pathway, drug screening and discovery methods, as well as methods of using Hedgehog 
small molecules to activate or inhibit the Hedgehog signaling pathway for a variety of therapeutic indications or diagnostic 
uses. In addition, we have filed foreign patent applications corresponding to many of the aforementioned U.S. filings that could 
provide additional patent protection for products that activate or inhibit the Hedgehog signaling pathway.
Our academic and research institution collaborators have certain rights to publish data and information regarding their 
discoveries to which we have rights. While we believe that the prepublication access to the data developed by our collaborators 
pursuant to our collaboration agreements will be sufficient to permit us to apply for patent protection in the areas in which we 
are interested in pursuing further research, there is considerable pressure on such institutions to rapidly publish discoveries 
arising from their efforts. This may affect our ability to obtain patent protection in the areas in which we may have an interest. 
In addition, these collaboration agreements typically contain provisions that provide us with, at a minimum, an option to license 
the institution’s rights to intellectual property arising from the collaboration.
We are party to various license agreements that give us rights to commercialize various technologies and to use 
technologies in our research and development processes. The consideration payable in exchange for these licenses includes up-
front fees, issuances of shares of common stock, annual royalties, milestone payments and royalties on net sales by our sub-
licensees and us. The licensors may terminate these agreements if we fail to meet certain diligence requirements, fail to make 
payments or otherwise commit a material breach that is not cured after notice.
In addition, we depend upon trade secrets, know-how and continuing technological advances to develop and maintain our 
competitive position. To maintain the confidentiality of trade secrets and proprietary information, we require our employees, 
scientific advisors, consultants and collaborators, upon commencement of a relationship with us, to execute confidentiality 
agreements and, in the case of parties other than our research and development collaborators, to agree to assign their inventions 
to us. These agreements are designed to protect our proprietary information and to grant us ownership of technologies that are 
developed in connection with their relationship to us.
Government Regulation and Product Approval
Government authorities in the United States, at the federal, state and local level, and in other countries and jurisdictions, 
including the European Union, or EU, extensively regulate, among other things, the research, development, testing, 
manufacture, quality control, approval, packaging, storage, recordkeeping, labeling, advertising, promotion, distribution, 
marketing, sales, pricing, reimbursement, post-approval monitoring and reporting, and import and export of pharmaceutical 
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products. The processes for obtaining regulatory approvals in the United States and in foreign countries and jurisdictions, along 
with subsequent compliance with applicable statutes and regulations and other regulatory authorities, require the expenditure of 
substantial time and financial resources and may have a significant impact on our business.
Review and Approval of Drugs in the United States
In the United States, the FDA approves and regulates drug products under the Federal Food, Drug, and Cosmetic Act, or 
FDCA, and related regulations and guidance documents. 
A company, institution, or organization which takes responsibility for the initiation and management of a clinical 
development program for such products is referred to as a sponsor. A sponsor seeking approval to market and distribute a new 
drug in the United States must satisfactorily secure each of the following:
•
completion of preclinical laboratory tests in compliance with the FDA’s good laboratory practice, or GLP, 
regulations;
•
design of a clinical protocol and submission to the FDA of an investigational new drug application, or IND, which 
must take effect before human clinical trials may begin;
•
approval by an independent institutional review board, or IRB, representing each clinical site before each clinical trial 
may be initiated;
•
performance of adequate and well-controlled human clinical trials in accordance with good clinical practices, or 
GCPs, to establish the safety and efficacy of the proposed drug product for each proposed indication;
•
submission to the FDA of an NDA for a drug candidate product requesting marketing for one or more proposed 
indications;
•
review of the request for approval by an FDA advisory committee, where appropriate or if applicable;
•
completion of one or more FDA inspections of the manufacturing facility or facilities at which the product, or 
components thereof, are produced to assess compliance with current Good Manufacturing Practices, or similar 
foreign standards, which we refer to as cGMPs, to assure the product’s identity, strength, quality and purity;
•
satisfactory completion of FDA audits of the sponsor, vendors, and/or clinical trial sites to assure compliance with 
GCPs and the integrity of the clinical data;
•
payment of substantial application and program fees pursuant to the Prescription Drug User Fee Act, or PDUFA;
•
securing FDA approval of the NDA authorizing marketing of the product in the United States for particular 
indications and under certain conditions; and
•
compliance with any post-approval requirements, including the potential requirement to implement a Risk Evaluation 
and Mitigation Strategy, or REMS, and the potential requirement to conduct post-approval studies.
Preclinical Studies
Before a sponsor begins testing a compound with potential therapeutic value in humans, the drug candidate enters the 
preclinical testing stage. Preclinical studies include laboratory evaluation of purity and stability of the manufactured substance, 
or active pharmaceutical ingredient and the formulated product, as well as in vitro and animal studies to assess the safety and 
activity of the drug candidate for initial testing in humans and to establish a rationale for therapeutic use. These studies are 
typically referred to as IND-enabling studies. The conduct of preclinical studies is subject to federal regulations and 
requirements, including GLP regulations and standards and the United States Department of Agriculture’s Animal Welfare Act, 
if applicable. Some long-term preclinical testing, such as animal tests of reproductive adverse events and carcinogenicity, and 
long-term toxicity studies, may continue after the IND is submitted.
The IND and IRB Processes
An IND is a request for FDA authorization to administer an investigational drug candidate to humans. Such authorization 
must be secured prior to interstate shipment and administration of any new drug that is not the subject of an approved NDA. In 
support of a request for an IND, sponsors must submit a protocol for each clinical trial and any subsequent protocol 
amendments must be submitted to the FDA as part of the IND. In addition, the results of the preclinical tests, together with 
manufacturing information, analytical data, any available clinical data or literature and plans for clinical trials, among other 
things, are submitted to the FDA as part of an IND. The FDA requires a 30-day waiting period after the filing of each IND 
before clinical trials may begin. This waiting period is designed to allow the FDA to review the IND to determine whether 
human research subjects will be exposed to unreasonable health risks. Beyond reviewing an IND, to assure the safety and rights 
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of patients, the FDA’s review also focuses on the quality of the investigation and whether it will be adequate to permit an 
evaluation of the drug candidate’s effectiveness and safety. At any time during this 30-day period, the FDA may raise concerns 
or questions about the conduct of the trials as outlined in the IND and impose a clinical hold or partial clinical hold. In this case, 
the IND sponsor and the FDA must resolve any outstanding concerns before clinical trials can begin.
Following commencement of a clinical trial under an IND, the FDA may also place a clinical hold or partial clinical hold 
on that trial. Clinical holds are imposed by the FDA whenever there is concern for patient safety and may be a result of new 
data, findings, or developments in clinical, nonclinical, and/or chemistry, manufacturing and controls, or CMC. A clinical hold 
is an order issued by the FDA to the sponsor to delay a proposed clinical investigation or to suspend an ongoing investigation. 
A partial clinical hold is a delay or suspension of only part of the clinical work requested under the IND. For example, a 
specific protocol or part of a protocol is not allowed to proceed, while other protocols may do so. No more than 30 days after 
imposition of a clinical hold or partial clinical hold, the FDA will provide the sponsor a written explanation of the basis for the 
hold. Following issuance of a clinical hold or partial clinical hold, an investigation may only resume after the FDA has notified 
the sponsor that the investigation may proceed. The FDA will base that determination on information provided by the sponsor 
correcting the deficiencies previously cited or otherwise satisfying the FDA that the investigation can proceed.
A sponsor may choose, but is not required, to conduct a foreign clinical study under an IND. When a foreign clinical 
study is conducted under an IND, all IND requirements must be met unless waived. When a foreign clinical study is not 
conducted under an IND, the sponsor must ensure that the study complies with certain regulatory requirements of the FDA in 
order to use the study as support for an IND or application for marketing approval. Specifically, the studies must be conducted 
in accordance with GCP, including undergoing review and receiving approval by an independent ethics committee, or IEC, and 
seeking and receiving informed consent from subjects. GCP requirements encompass both ethical and data integrity standards 
for clinical studies. The GCP regulations are intended to help ensure the protection of human subjects enrolled in clinical 
studies, as well as the quality and integrity of the resulting data. 
Clinical Studies Outside the United States in Support of FDA Approval
In connection with our clinical development program, we may conduct trials at sites outside the United States. When a 
foreign clinical study is conducted under an IND, all IND requirements must be met unless waived. When a foreign clinical 
study is not conducted under an IND, the sponsor must ensure that the study complies with certain regulatory requirements of 
the FDA in order to use the study as support for an IND or application for marketing approval. Specifically, the studies must be 
conducted in accordance with GCP, including undergoing review and receiving approval by an independent ethics committee, 
or IEC, and seeking and receiving informed consent from subjects. GCP requirements encompass both ethical and data integrity 
standards for clinical studies. The FDA’s regulations are intended to help ensure the protection of human subjects enrolled in 
non-IND foreign clinical studies, as well as the quality and integrity of the resulting data. They further help ensure that non-
IND foreign studies are conducted in a manner comparable to that required for IND studies. 
The acceptance by the FDA of study data from clinical trials conducted outside the United States in support of US 
approval may be subject to certain conditions or may not be accepted at all. In cases where data from foreign clinical trials are 
intended to serve as the sole basis for marketing approval in the U.S., the FDA will generally not approve the application on the 
basis of foreign data alone unless (i) the data are applicable to the U.S. population and U.S. medical practice; (ii) the trials were 
performed by clinical investigators of recognized competence and pursuant to GCP regulations; and (iii) the data may be 
considered valid without the need for an on-site inspection by the FDA, or if the FDA considers such inspection to be 
necessary, the FDA is able to validate the data through an on-site inspection or other appropriate means.
In addition, even where the foreign study data are not intended to serve as the sole basis for approval, the FDA will not 
accept the data as support for an application for marketing approval unless the study is well-designed and well-conducted in 
accordance with GCP requirements and the FDA is able to validate the data from the study through an onsite inspection if 
deemed necessary. Many foreign regulatory authorities have similar approval requirements. In addition, such foreign trials are 
subject to the applicable local laws of the foreign jurisdictions where the trials are conducted.
In addition to the foregoing IND requirements, an IRB representing each institution participating in the clinical trial must 
review and approve the plan for any clinical trial before it commences at that institution, and the IRB must conduct a continuing 
review and reapprove the trial at least annually. The IRB must review and approve, among other things, the trial protocol and 
informed consent information to be provided to trial subjects. An IRB must operate in compliance with FDA regulations. An 
IRB can suspend or terminate approval of a clinical trial at its institution, or an institution it represents, if the clinical trial is not 
being conducted in accordance with the IRB’s requirements or if the drug candidate has been associated with unexpected 
serious harm to patients.
Additionally, some trials are overseen by an independent group of qualified experts organized by the trial sponsor, known 
as a data monitoring committee. This group provides authorization for whether a trial may move forward at designated check 
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points based on access that only the group maintains to available data from the trial. Suspension or termination of development 
during any phase of clinical trials can occur if it is determined that the participants or patients are being exposed to an 
unacceptable health risk. Other reasons for suspension or termination may be made based on evolving business objectives and/
or competitive climate.
Sponsors of clinical trials are required to register and disclose certain clinical trial information for some trials on a public 
registry (clinicaltrials.gov) maintained by the U.S. National Institutes of Health, or NIH.  In particular, information related to 
the product, patient population, phase of investigation, study sites and investigators and other aspects of the clinical trial is 
made public as part of the registration of the clinical trial. The NIH’s Final Rule on registration and reporting requirements for 
clinical trials became effective in 2017. The FDA had historically not enforced these reporting requirements due to the United 
States Department of Health and Human Services', or HHS, long delay in issuing final implementing regulations.  With those 
regulations now in place, the FDA has issued, as of December 19, 2024, six notices of non-compliance, thereby signaling the 
government’s willingness to begin enforcing these requirements against non-compliant clinical trial sponsors. While these 
notices of non-compliance did not result in civil monetary penalties, the failure to submit clinical trial information to 
clinicaltrials.gov is a prohibited act under the FDCA with violations subject to potential civil monetary penalties of up to 
$10,000 for each day the violation continues. Violations may also result in injunctions and/or criminal prosecution or 
disqualification from federal grants
Expanded Access to an Investigational Drug for Treatment Use 
Expanded access, sometimes called “compassionate use,” is the use of investigational new drug products outside of 
clinical trials to treat patients with serious or immediately life-threatening diseases or conditions when there are no comparable 
or satisfactory alternative treatment options. FDA regulations allow access to investigational drugs under an IND by the 
company or the treating physician for treatment purposes on a case-by-case basis for: individual patients (single-patient IND 
applications for treatment in emergency settings and non-emergency settings); intermediate-size patient populations; and larger 
populations for use of the drug under a treatment protocol, or Treatment IND Application. 
When considering an IND application for expanded access to an investigational product with the purpose of treating a 
patient or a group of patients, the sponsor and treating physicians or investigators will determine suitability when all of the 
following criteria apply: patient(s) have a serious or immediately life-threatening disease or condition, and there is no 
comparable or satisfactory alternative therapy to diagnose, monitor, or treat the disease or condition; the potential patient 
benefit justifies the potential risks of the treatment and the potential risks are not unreasonable in the context or condition to be 
treated; and the expanded use of the investigational drug for the requested treatment will not interfere with initiation, conduct, 
or completion of clinical investigations that could support marketing approval of the product or otherwise compromise the 
potential development of the product.
There is no obligation for a sponsor to make its candidate products available for expanded access; however, as required by 
the 21st Century Cures Act, or Cures Act, passed in 2016, sponsors are required to make their expanded access policies publicly 
available upon the earlier of initiation of a Phase 2 or Phase 3 study; or 15 days after the drug receives designation as a 
breakthrough therapy, fast track product, or regenerative medicine advanced therapy.
In addition, on May 30, 2018, the Right to Try Act, was signed into law. The law, among other things, provides a federal 
framework for certain patients to access certain investigational new drug products that have completed a Phase 1 clinical trial 
and that are undergoing investigation for FDA approval. Under certain circumstances, eligible patients can seek treatment 
without enrolling in clinical trials and without obtaining FDA permission under the FDA expanded access program. There is no 
obligation for a drug manufacturer to make its drug products available to eligible patients, but the manufacturer must develop 
an internal policy and respond to patient requests according to that policy. 
Human Clinical Studies in Support of an NDA
Clinical trials involve the administration of the investigational product to human subjects under the supervision of 
qualified investigators in accordance with GCP requirements, which include, among other things, the requirement that all 
research subjects provide their informed consent in writing before their participation in any clinical trial. Clinical trials are 
conducted under written trial protocols detailing, among other things, the inclusion and exclusion criteria, the objectives of the 
trial, the parameters to be used in monitoring safety and the effectiveness criteria to be evaluated. 
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The clinical investigation of an investigational drug is generally divided into four phases. Although the phases are usually 
conducted sequentially, they may overlap or be combined. The four phases of an investigation are as follows:
•
Phase 1.    Phase 1 studies include the initial introduction of an investigational new drug into humans. These studies 
are designed to evaluate the safety, dosage tolerance, metabolism and pharmacologic actions of the investigational 
drug in humans, the side effects associated with increasing doses, and if possible, to gain early evidence on 
effectiveness.
•
Phase 2.    Phase 2 includes clinical trials conducted to preliminarily or further evaluate the effectiveness of the 
investigational drug for a particular indication(s) in patients with the disease or condition under trial, to determine 
dosage tolerance and optimal dosage, and to identify possible adverse side effects and safety risks associated with the 
drug. Phase 2 clinical trials are typically closely monitored and conducted in a limited patient population.
•
Phase 3.    Phase 3 clinical trials are often controlled clinical trials conducted at geographically dispersed clinical trial 
sites. They are performed after preliminary evidence suggesting effectiveness of the drug has been obtained, and are 
intended to further evaluate dosage, clinical effectiveness and safety, to establish the overall benefit-risk relationship 
of the investigational drug, and to provide an adequate basis for product approval.
•
Phase 4.    Post-approval studies may be conducted after initial marketing approval. These studies are used to gain 
additional experience from the treatment of patients in the intended therapeutic indication.
A clinical trial may combine the elements of more than one phase and the FDA often requires more than one Phase 3 trial 
to support marketing approval of a drug candidate. A company’s designation of a clinical trial as being of a particular phase is 
not necessarily indicative that the study will be sufficient to satisfy the FDA requirements of that phase because this 
determination cannot be made until the protocol and data have been submitted to and reviewed by the FDA. Moreover, as noted 
above, a pivotal trial is a clinical trial that is believed to satisfy FDA requirements for the evaluation of a drug candidate’s 
safety and efficacy such that it can be used, alone or with other pivotal or non-pivotal trials, to support regulatory approval. 
Generally, pivotal trials are Phase 3 trials, but they may be Phase 2 trials if the design provides a well-controlled and reliable 
assessment of clinical benefit, particularly in an area of unmet medical need.
In March 2022 the FDA released a final guidance entitled “Expansion Cohorts: Use in First-In-Human Clinical Trials to 
Expedite Development of Oncology Drugs and Biologics,” which outlines how developers can utilize an adaptive trial design 
commonly referred to as a seamless trial design in early stages of oncology product development (i.e., the first-in-human 
clinical trial) to compress the traditional three phases of trials into one continuous trial called an expansion cohort trial. 
Information to support the design of individual expansion cohorts are included in IND applications and assessed by the FDA. 
Expansion cohort trials can potentially bring efficiency to product development and reduce developmental costs and time.
In June 2023, the FDA issued draft guidance with updated recommendations for GCPs aimed at modernizing the design 
and conduct of clinical trials. The updates are intended to help pave the way for more efficient clinical trials to facilitate the 
development of medical products. The draft guidance is adopted from the International Council for Harmonisation’s, or ICH’s, 
recently updated E6(R3) draft guideline that was developed to enable the incorporation of rapidly developing technological and 
methodological innovations into the clinical trial enterprise. That guideline was finalized by the ICH on January 6, 2025. In 
addition, the FDA issued draft guidance outlining recommendations for the implementation of decentralized clinical trials.
In December 2022, with the passage of the Food and Drug Omnibus Reform Act, or FDORA, Congress required sponsors 
to develop and submit a diversity action plan, or DAP, for each Phase 3 clinical trial or any other “pivotal study” of a new drug. 
These plans are meant to encourage the enrollment of more diverse patient populations in late-stage clinical trials of FDA-
regulated products. Specifically, DAPs must include the sponsor’s goals for enrollment, the underlying rationale for those goals, 
and an explanation of how the sponsor intends to meet them. In addition to these requirements, the legislation directs the FDA 
to issue new guidance on DAPs. In June 2024, the FDA issued draft guidance setting out its policies for the collection of race 
and ethnicity data in clinical trials. Unlike most guidance documents issued by the FDA, the DAP guidance when finalized will 
have the force of law because FDORA specifically dictates that the form and manner for submission of DAPs are specified in 
FDA guidance. 
Interactions with the FDA During the Clinical Development Program
Following the clearance of an IND and the commencement of clinical trials, the sponsor will continue to have interactions 
with the FDA. Progress reports detailing the results of clinical trials must be submitted annually within 60 days of the 
anniversary dates that the IND went into effect and more frequently if serious adverse events occur. These reports must include 
a development safety update report. In addition, IND safety reports must be submitted to the FDA for any of the following: 
serious and unexpected suspected adverse reactions; findings from other studies or animal or in vitro testing that suggest a 
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significant risk in humans exposed to the product; and any clinically important increase in the occurrence of a serious suspected 
adverse reaction over that listed in the protocol or investigator brochure. Phase 1, Phase 2, and Phase 3 clinical trials may not be 
completed successfully within any specified period, or at all. The FDA will typically inspect one or more clinical sites to assure 
compliance with GCP and the integrity of the clinical data submitted. With passage of FDORA, Congress clarified the FDA’s 
authority to conduct inspections by expressly permitting inspection of facilities involved in the preparation, conduct, or analysis 
of clinical and non-clinical studies submitted to the FDA as well as other persons holding study records or involved in the study 
process.
In addition, sponsors are given opportunities to meet with the FDA at certain points in the clinical development program. 
Specifically, sponsors may meet with the FDA prior to the submission of an IND, a Pre-IND meeting, at the end of Phase 2 
clinical trial, a EOP2 meeting, and before an NDA is submitted, a Pre-NDA meeting. Meetings at other times may also be 
requested. There are five types of meetings that occur between sponsors and the FDA. Type A meetings are those that are 
necessary for an otherwise stalled product development program to proceed or to address an important safety issue. Type B 
meetings include pre-IND and pre-NDA meetings as well as end of phase meetings such as EOP2 meetings. A Type C meeting 
is any meeting other than a Type A or Type B meeting regarding the development and review of a product, including, for 
example, meetings to facilitate early consultations on the use of a biomarker as a new surrogate endpoint that has never been 
previously used as the primary basis for product approval in the proposed context of use. A Type D meeting is focused on a 
narrow set of issues (should be limited to no more than 2 focused topics) and should not require input from more than 3 
disciplines or divisions. Finally, INTERACT meetings are intended for novel products and development programs that present 
unique challenges in the early development of an investigational product.
These meetings provide an opportunity for the sponsor to share information about the data gathered to date with the FDA 
and for the FDA to provide advice on the next phase of development. For example, at an EOP2 meeting, a sponsor may discuss 
its Phase 2 clinical results and present its plans for the pivotal Phase 3 clinical trial(s) that it believes will support the approval 
of the new product. Such meetings may be conducted in person, via teleconference/videoconference, or written response only 
with minutes reflecting the questions that the sponsor posed to the FDA and the agency’s responses. The FDA has indicated 
that its responses, as conveyed in meeting minutes and advice letters, only constitute mere recommendations and/or advice 
made to a sponsor and, as such, sponsors are not bound by such recommendations and/or advice. Nonetheless, from a practical 
perspective, a sponsor’s failure to follow the FDA’s recommendations for design of a clinical program may put the program at 
significant risk of failure. In September 2023, the FDA issued draft guidance outlining the terms of such meetings in more 
detail.
Manufacturing and Other Regulatory Requirements
Concurrent with clinical trials, companies often complete additional animal studies and must also develop additional 
information about the chemistry and physical characteristics of the drug as well as 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 drug candidate and, among other things, must develop methods for testing the 
identity, strength, quality, purity, and potency of the final drug. Additionally, appropriate packaging must be selected and tested 
and stability studies must be conducted to demonstrate that the drug candidate does not undergo unacceptable deterioration over 
its shelf life.
Specifically, the FDA’s regulations require that pharmaceutical products be manufactured in specific approved facilities 
and in accordance with cGMPs. The cGMP regulations include requirements relating to organization of personnel, buildings 
and facilities, equipment, control of components and product containers and closures, production and process controls, 
packaging and labeling controls, holding and distribution, laboratory controls, records and reports and returned or salvaged 
products. Manufacturers and other entities involved in the manufacture and distribution of approved pharmaceuticals are 
required to register their establishments with the FDA and some state agencies, and they are subject to periodic unannounced 
inspections by the FDA for compliance with cGMPs and other requirements. The PREVENT Pandemics Act, which was 
enacted in December 2022, clarifies that foreign drug manufacturing establishments are subject to registration and listing 
requirements even if a drug undergoes further manufacture, preparation, propagation, compounding, or processing at a separate 
establishment outside the United States prior to being imported or offered for import into the United States.
Inspections must follow a “risk-based schedule” that may result in certain establishments being inspected more frequently. 
Manufacturers may also have to provide, on request, electronic or physical records regarding their establishments. Delaying, 
denying, limiting, or refusing inspection by the FDA may lead to a product being deemed to be adulterated. Changes to the 
manufacturing process, specifications or container closure system for an approved product are strictly regulated and often 
require prior FDA approval before being implemented. The FDA’s regulations also require, among other things, the 
investigation and correction of any deviations from cGMP and the imposition of reporting and documentation requirements 
upon the sponsor and any third party manufacturers involved in producing the approved product.
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Pediatric Studies
Under the Pediatric Research Equity Act of 2003, or PREA, an application or supplement thereto must contain data that 
are adequate to assess the safety and effectiveness of the product for the claimed indications in all relevant pediatric 
subpopulations, and to support dosing and administration for each pediatric subpopulation for which the product is safe and 
effective. Sponsors must also submit pediatric study plans prior to the assessment data. Those plans must contain an outline of 
the proposed pediatric study or studies the sponsor plans to conduct, including study objectives and design, any deferral or 
waiver requests and other information required by regulation. The sponsor, the FDA, and the FDA’s internal review committee 
must then review the information submitted, consult with each other and agree upon a final plan. The FDA or the sponsor may 
request an amendment to the plan at any time.
A sponsor must submit an Initial Pediatric Study Plan, or iPSP, no later than either 60 calendar days after the date of the 
end-of-Phase 2 meeting or such other time as agreed upon between FDA and the sponsor. In the absence of an end-of-Phase 2 
meeting, the sponsor should submit the iPSP as early as practicable but before the initiation of any Phase 3 studies, or any 
combined Phase 2 and Phase 3 studies, of the drug that is the subject of the iPSP. If a Phase 3 study, or a combined Phase 2 and 
Phase 3 study, will not be conducted or will be conducted but not under IND, the sponsor should submit the iPSP no later than 
210 calendar days before it submits a marketing application or supplement.
The FDA may, on its own initiative or at the request of the sponsor, grant deferrals for submission of some or all pediatric 
data until after approval of the product for use in adults, or full or partial waivers from the pediatric data requirements. A 
deferral may be granted for several reasons, including a finding that the product or therapeutic candidate is ready for approval 
for use in adults before pediatric trials are complete or that additional safety or effectiveness data needs to be collected before 
the pediatric trials begin. The law now requires the FDA to send a PREA Non-Compliance letter to sponsors who have failed to 
submit their pediatric assessments required under PREA, have failed to seek or obtain a deferral or deferral extension or have 
failed to request approval for a required pediatric formulation. It further requires the FDA to publicly post the PREA Non-
Compliance letter and sponsor’s response. In May 2023, the FDA issued new draft guidance that further describes the pediatric 
study requirements under PREA.
Unless otherwise required by regulation, the pediatric data requirements do not apply to products with orphan designation, 
although FDA has recently taken steps to limit what it considers abuse of this statutory exemption in PREA by announcing that 
it does not intend to grant any additional orphan drug designations for rare pediatric subpopulations of what is otherwise a 
common disease. The FDA also maintains a list of diseases that are exempt from PREA requirements due to low prevalence of 
disease in the pediatric population. A notable exception is that early pediatric evaluations of certain molecularly targeted 
oncology drugs are required, regardless of orphan designation, by section 505B(a)(1)(B) of the FDCA.
Section 505(b)(2) NDAs
NDAs for most new drug products are based on two full clinical studies which must contain substantial evidence of the 
safety and efficacy of the proposed new product for the proposed use. These applications are submitted under Section 505(b)(1) 
of the FDCA. The FDA is, however, authorized to approve an alternative type of NDA under Section 505(b)(2) of the FDCA. 
This type of application allows the sponsor to rely, in part, on the FDA’s previous findings of safety and efficacy for a similar 
product, or published literature. Specifically, Section 505(b)(2) applies to NDAs for a drug for which the investigations made to 
show whether or not the drug is safe for use and effective in use and relied upon by the sponsor for approval of the application 
“were not conducted by or for the applicant and for which the applicant has not obtained a right of reference or use from the 
person by or for whom the investigations were conducted.”
Section 505(b)(2) thus authorizes the FDA to approve an NDA based on safety and effectiveness data that were not 
developed by the sponsor. NDAs filed under Section 505(b)(2) may provide an alternate and potentially more expeditious 
pathway to FDA approval for new or improved formulations or new uses of previously approved products. If the 505(b)(2) 
sponsor can establish that reliance on the FDA’s previous approval is scientifically appropriate, the sponsor may eliminate the 
need to conduct certain preclinical or clinical studies of the new product. The FDA may also require companies to perform 
additional studies or measurements to support the change from the approved product. The FDA may then approve the new drug 
candidate for all or some of the label indications for which the referenced product has been approved, as well as for any new 
indication sought by the Section 505(b)(2) sponsor.
Fast Track, Breakthrough Therapy, Priority Review and Regenerative Advanced Therapy Designations
The FDA is authorized to designate certain products for expedited review if they are intended to address an unmet medical 
need in the treatment of a serious or life-threatening disease or condition. These programs are referred to as fast track 
designation, breakthrough therapy designation, priority review designation, and accelerated approval, collectively referred to as 
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facilitated regulatory pathways, and regenerative advanced therapy designation. None of these expedited programs changes the 
standards for approval but they may help expedite the development or approval process for drug candidates. 
Specifically, the FDA may designate a product for Fast Track review if it is intended, whether alone or in combination 
with one or more other products, for the treatment of a serious or life-threatening disease or condition, and it demonstrates the 
potential to address unmet medical needs for such a disease or condition. For Fast Track products, sponsors may have greater 
interactions with the FDA and the FDA may initiate review of sections of a Fast Track product’s marketing application before 
the application is complete. This rolling review may be available if the FDA determines, after preliminary evaluation of clinical 
data submitted by the sponsor, that a Fast Track product may be effective. The sponsor must also provide, and the FDA must 
approve, a schedule for the submission of the remaining information and the sponsor must pay applicable user fees. However, 
the FDA’s time period goal for reviewing a Fast Track application does not begin until the last section of the application is 
submitted. In addition, the Fast Track designation may be withdrawn by the FDA if the FDA believes that the designation is no 
longer supported by data emerging in the clinical trial process.
Second, a product may be designated as a Breakthrough Therapy if it is intended, either alone or in combination with one 
or more other products, to treat a serious or life-threatening disease or condition and preliminary clinical evidence indicates that 
the product may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, 
such as substantial treatment effects observed early in clinical development. The FDA may take certain actions with respect to 
Breakthrough Therapies, including holding meetings with the sponsor throughout the development process; providing timely 
advice to the product sponsor regarding development and approval; involving more senior staff in the review process; assigning 
a cross-disciplinary project lead for the review team; and taking other steps to help the sponsor design the clinical trials in an 
efficient manner.
Third, the FDA may designate a marketing application for priority review if it is for a product that treats a serious 
condition and, if approved, would provide a significant improvement in safety or effectiveness. The FDA determines, on a case- 
by-case basis, whether the proposed product represents a significant improvement when compared with other available 
therapies. Significant improvement may be illustrated by evidence of increased effectiveness in the treatment of a condition, 
elimination or substantial reduction of a treatment-limiting product reaction, documented enhancement of patient compliance 
that may lead to improvement in serious outcomes, and evidence of safety and effectiveness in a new subpopulation. A priority 
review is intended to direct overall attention and resources to the evaluation of such applications, and to shorten the FDA’s goal 
for taking action on a marketing application from ten months to six months.
Finally, with passage of the Cures Act in December 2016, Congress authorized the FDA to accelerate review and approval 
of products designated as regenerative advanced therapies. A product is eligible for this designation if it is a regenerative 
medicine therapy that is intended to treat, modify, reverse or cure a serious or life-threatening disease or condition and 
preliminary clinical evidence indicates that the drug has the potential to address unmet medical needs for such disease or 
condition. The benefits of a regenerative advanced therapy designation include early interactions with FDA to expedite 
development and review, benefits available to breakthrough therapies, potential eligibility for priority review and accelerated 
approval based on surrogate or intermediate endpoints.
Accelerated Approval Pathway
The FDA may grant accelerated approval to a product for a serious or life-threatening condition that provides meaningful 
therapeutic advantage to patients over existing treatments based upon a determination that the product has an effect on a 
surrogate endpoint that is reasonably likely to predict clinical benefit. The FDA may also grant accelerated approval for such a 
condition when the product has an effect on an intermediate clinical endpoint that can be measured earlier than an effect on 
irreversible morbidity or mortality, or IMM, and that is reasonably likely to predict an effect on IMM or other clinical benefit, 
taking into account the severity, rarity, or prevalence of the condition and the availability or lack of alternative treatments. 
Products granted accelerated approval must meet the same statutory standards for safety and effectiveness as those granted 
traditional approval.
For the purposes of accelerated approval, a surrogate endpoint is a marker, such as a laboratory measurement, 
radiographic image, physical sign, or other measure that is thought to predict clinical benefit, but is not itself a measure of 
clinical benefit. Surrogate endpoints can often be measured more easily or more rapidly than clinical endpoints. An intermediate 
clinical endpoint is a measurement of a therapeutic effect that is considered reasonably likely to predict the clinical benefit of a 
drug, such as an effect on IMM. The FDA has limited experience with accelerated approvals based on intermediate clinical 
endpoints, but has indicated that such endpoints generally may support accelerated approval where the therapeutic effect 
measured by the endpoint is not itself a clinical benefit and basis for traditional approval, if there is a basis for concluding that 
the therapeutic effect is reasonably likely to predict the ultimate clinical benefit of a product.
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The accelerated approval pathway is most often used in settings in which the course of a disease is long and an extended 
period of time is required to measure the intended clinical benefit of a product, even if the effect on the surrogate or 
intermediate clinical endpoint occurs rapidly. Thus, accelerated approval has been used extensively in the development and 
approval of products for treatment of a variety of cancers in which the goal of therapy is generally to improve survival or 
decrease morbidity and the duration of the typical disease course requires lengthy and sometimes large trials to demonstrate a 
clinical or survival benefit. Thus, the benefit of accelerated approval derives from the potential to receive approval based on 
surrogate endpoints sooner than possible for trials with clinical or survival endpoints, rather than deriving from any explicit 
shortening of the FDA approval timeline, as is the case with priority review.
The accelerated approval pathway is usually contingent on a sponsor’s agreement to conduct, in a diligent manner, 
additional post approval confirmatory studies to verify and describe the product’s clinical benefit. As a result, a drug candidate 
approved on this basis is subject to rigorous post marketing compliance requirements, including the completion of Phase 4 or 
post approval clinical trials to confirm the effect on the clinical endpoint. Failure to conduct required post approval studies, or 
confirm a clinical benefit during post marketing studies, would allow the FDA to initiate expedited proceedings to withdraw the 
approval of the product. All promotional materials for drug candidates approved under accelerated regulations are subject to 
prior review by the FDA.
With passage of FDORA in December 2022, Congress modified certain provisions governing accelerated approval of 
drug products. Specifically, the new legislation authorized the FDA to require a sponsor to have its confirmatory clinical trial 
underway before accelerated approval is awarded and to submit progress reports on its post-approval studies to the FDA every 
six months until the study is completed. Moreover, FDORA established expedited procedures authorizing the FDA to withdraw 
an accelerated approval if certain conditions are met, including where a required confirmatory study fails to verify and describe 
the predicted clinical benefit or where evidence demonstrates the product is not shown to be safe or effective under the 
conditions of use. The FDA may also use such procedures to withdraw an accelerated approval if a sponsor fails to conduct any 
required post-approval trial of the product with due diligence, including with respect to “conditions specified by the Secretary.” 
The new procedures include the provision of due notice and an explanation for a proposed withdrawal, and opportunities for a 
meeting with the Commissioner or the Commissioner’s designee and a written appeal, among other things. 
In March 2023, the FDA issued draft guidance that outlines its current thinking and approach to accelerated approval. The 
agency indicated that the accelerated approval pathway is commonly used for approval of oncology drugs due to the serious and 
life-threatening nature of cancer. Although single-arm trials have been commonly used to support accelerated approval, a 
randomized controlled trial is the preferred approach as it provides a more robust efficacy and safety assessment and allows for 
direct comparisons to an available therapy. To that end, the FDA outlined considerations for designing, conducting, and 
analyzing data for trials intended to support accelerated approvals of oncology therapeutics. Subsequently, in December 2024 
and January 2025, the FDA issued additional draft guidances relating to accelerated approval. These guidances describe the 
FDA’s views on what it means to conduct a confirmatory trial with due diligence and how the agency plans to interpret whether 
such a study needs to be underway at the time of approval. While these guidances are currently only in draft form and will 
ultimately not be legally binding even when finalized, sponsors typically observe the FDA’s guidance closely to ensure that 
their investigational products qualify for accelerated approval. 
Project Optimus
Project Optimus is an initiative of the Oncology Center of Excellence at the FDA. This project focuses on dose 
optimization and dose selection in oncology drug development, and whether the current paradigm based on cytotoxic 
chemotherapeutics leads to doses and schedules of molecularly targeted therapies that provide more toxicity without additional 
efficacy, among other things. In Project Optimus, drug developers have the opportunity to meet with the FDA’s Oncology 
Review Divisions early in their development programs, well before conducting trials intended for registration, to discuss dose-
finding and dose optimization. The program thus allows sponsors to develop strategies for dose finding and dose optimization 
that leverages nonclinical and clinical data in dose selection, including randomized evaluations of a range of doses in trials, with 
the objective of performing these studies as early as possible in the development program to bring promising new therapies to 
patients. In August 2024, the FDA issued final guidance to assist sponsors in identifying the optimal dosage(s) for human 
prescription drugs for the treatment of oncologic diseases during clinical development prior to submitting an application for 
approval for a new indication and usage.
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Submission and Filing of an NDA 
In order to obtain approval to market a drug in the United States, a marketing application must be submitted to the FDA 
that provides data establishing the safety and effectiveness of the proposed drug product for the proposed indication. The 
application includes all relevant data available from pertinent preclinical and clinical trials, including negative or ambiguous 
results as well as positive findings, together with detailed information relating to the product’s chemistry, manufacturing, 
controls and proposed labeling, among other things. Data can come from company-sponsored clinical trials intended to test the 
safety and effectiveness of a use of a product, or from a number of alternative sources, including studies initiated by 
investigators. To support marketing approval, the data submitted must be sufficient in quality and quantity to establish the 
safety and effectiveness of the investigational drug product to the satisfaction of the FDA.
The application is the vehicle through which sponsors formally propose that the FDA approve a new product for 
marketing and sale in the United States for one or more indications. Every new drug candidate must be the subject of an 
approved NDA before it may be commercialized in the United States. Under federal law, the submission of most applications is 
subject to an application user fee, which for federal fiscal year 2025 is $4,310,002 for an application requiring clinical data. The 
sponsor of an approved application is also subject to an annual program fee, which for fiscal year 2025 is $403,889. Certain 
exceptions and waivers are available for some of these fees, such as an exception from the application fee for products with 
orphan designation and a waiver for certain small businesses. If an application is withdrawn prior to the FDA acceptance for 
filing, 75% of these fees may be refunded to the sponsor. If an application is withdrawn after filing, a lower portion of these 
fees may be refunded in certain circumstances.
Following submission of an NDA, the FDA conducts a preliminary review of all applications within 60 days of receipt 
and must inform the sponsor at that time or before whether an application is sufficiently complete to permit substantive review. 
In pertinent part, FDA’s regulations state that an application “shall not be considered as filed until all pertinent information and 
data have been received” by the FDA. In the event that FDA determines that an application does not satisfy this standard, it will 
issue a Refuse to File, or RTF, determination to the sponsor. Typically, an RTF will be based on administrative incompleteness, 
such as clear omission of information or sections of required information; scientific incompleteness, such as omission of critical 
data, information or analyses needed to evaluate safety and efficacy or provide adequate directions for use; or inadequate 
content, presentation, or organization of information such that substantive and meaningful review is precluded. The FDA may 
request additional information rather than accept an application for filing. In this event, the application must be resubmitted 
with the additional information. The resubmitted application is also subject to review before the FDA accepts it for filing.
Once the submission is accepted for filing, the FDA begins an in-depth substantive review. The FDA has agreed to 
specified performance goals in the review process of NDAs. Under that agreement, 90% of applications seeking approval of 
New Molecular Entities, or NMEs, are meant to be reviewed within ten months from the date on which FDA accepts the NDA 
for filing, and 90% of applications for NMEs that have been designated for “priority review” are meant to be reviewed within 
six months of the filing date. The review process and the Prescription Drug User Fee Act goal date may be extended by the 
FDA for three additional months to consider new information or clarification provided by the sponsor to address an outstanding 
deficiency identified by the FDA following the original submission.
The FDA seeks to meet these timelines for review of an application but its ability to do so may be affected by a variety of 
factors. While the costs associated with review of an application are typically covered by the PDUFA user fee program, other 
activities, including government budget and funding levels, the ability to hire and retain key personnel and statutory, regulatory 
and policy changes, may impact the FDA’s review and approval of marketing applications. Average review times at the agency 
have fluctuated in recent years, as a result. For example, during the past decade, the U.S. government has shut down several 
times and certain regulatory agencies, including the FDA, have had to furlough critical employees and stop critical activities. 
Further, there is substantial uncertainty as to how measures currently being implemented by the new Trump Administration 
across the government will impact the FDA and other federal agencies with jurisdiction over drug products. 
Before approving an application, the FDA typically will inspect the facility or facilities where the product is or will be 
manufactured. These pre-approval inspections may cover all facilities associated with an NDA submission, including drug 
component manufacturing, (e.g., active pharmaceutical ingredients), finished drug product manufacturing, and control testing 
laboratories. The FDA will not approve an application unless it determines that the manufacturing processes and facilities are in 
compliance with cGMP requirements and adequate to assure consistent production of the product within required specifications. 
Additionally, before approving an NDA, the FDA will typically inspect one or more clinical sites to assure compliance 
with GCP. With passage of FDORA, Congress clarified FDA’s authority to conduct inspections by expressly permitting 
inspection of facilities involved in the preparation, conduct, or analysis of clinical and non-clinical studies submitted to FDA as 
well as other persons holding study records or involved in the study process.
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Moreover, the FDA will review a sponsor’s financial relationship with the principal investigators who conducted the 
clinical trials in support of the NDA. That is because, under certain circumstances, principal investigators at a clinical trial site 
may also serve as scientific advisors or consultants to a sponsor and receive compensation in connection with such services. 
Depending on the level of that compensation and any other financial interest a principal investigator may have in a sponsor, the 
sponsor may be required to report these relationships to the FDA. The FDA will then evaluate that financial relationship and 
determine whether it creates a conflict of interest or otherwise affects the interpretation of the trial or the integrity of the data 
generated at the principal investigator’s clinical trial site. If so, the FDA may exclude data from the clinical trial site in 
connection with its determination of safety and efficacy of the investigational product.
In addition, as a condition of approval, the FDA may require a sponsor to develop a Risk Evaluation and Mitigation 
Strategy, or REMS. REMS use risk minimization strategies beyond the professional labeling to ensure that the benefits of the 
product outweigh the potential risks. To determine whether a REMS is needed, the FDA will consider the size of the population 
likely to use the product, seriousness of the disease, expected benefit of the product, expected duration of treatment, seriousness 
of known or potential adverse events, and whether the product is a new molecular entity. Under the FDA Reauthorization Act 
of 2017, the FDA must implement a protocol to expedite review of responses to inspection reports pertaining to certain 
applications, including applications for products in shortage or those for which approval is dependent on remediation of 
conditions identified in the inspection report.
The FDA may also refer an application to an advisory committee or explain why such referral was not made. Typically, 
an advisory committee is a panel of independent experts, including clinicians and other scientific experts, that reviews, 
evaluates and provides a recommendation as to whether the application should be approved and under what conditions. The 
FDA is not bound by the recommendations of an advisory committee, but it considers such recommendations carefully when 
making decisions.
The FDA’s Decision on an NDA
The FDA reviews an application to determine, among other things, whether the product is safe and whether it is effective 
for its intended use(s), with the latter determination being made on the basis of substantial evidence. The term “substantial 
evidence” is defined under the FDCA as “evidence consisting of adequate and well-controlled investigations, including clinical 
investigations, by experts qualified by scientific training and experience to evaluate the effectiveness of the product involved, 
on the basis of which it could fairly and responsibly be concluded by such experts that the product will have the effect it 
purports or is represented to have under the conditions of use prescribed, recommended, or suggested in the labeling or 
proposed labeling thereof.” The FDA has interpreted this evidentiary standard to require at least two adequate and well-
controlled clinical investigations to establish effectiveness of a new product. Under certain circumstances, however, the FDA 
has indicated that a single trial with certain characteristics and additional confirmatory information may satisfy this standard. 
After evaluating the application and all related information, including the advisory committee recommendations, if any, 
and inspection reports of manufacturing facilities and clinical trial sites, the FDA will issue either a Complete Response Letter, 
or CRL, or an approval letter. To reach this determination, the FDA must determine that the drug is effective and that its 
expected benefits outweigh its potential risks to patients. This “benefit-risk” assessment is informed by the extensive body of 
evidence about the product’s safety and efficacy in the NDA. This assessment is also informed by other factors, including: the 
severity of the underlying condition and how well patients’ medical needs are addressed by currently available therapies; 
uncertainty about how the premarket clinical trial evidence will extrapolate to real-world use of the product in the post-market 
setting; and whether risk management tools are necessary to manage specific risks.
A CRL indicates that the review cycle of the application is complete, and the application will not be approved in its 
present form. A CRL generally outlines the deficiencies in the submission and may require substantial additional testing or 
information in order for the FDA to reconsider the application. The CRL may require additional clinical or other data, 
additional pivotal Phase 3 clinical trial(s) and/or other significant and time-consuming requirements related to clinical trials, 
preclinical studies or manufacturing. If a CRL is issued, the sponsor will have one year to respond to the deficiencies identified 
by the FDA, at which time the FDA can deem the application withdrawn or, in its discretion, grant the sponsor an additional 
six-month extension to respond. The FDA has committed to reviewing resubmissions in response to an issued CRL in either 
two or six months depending on the type of information included. Even with the submission of this additional information, 
however, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval. The FDA has 
taken the position that a CRL is not final agency action making the determination subject to judicial review.
An approval letter, on the other hand, authorizes commercial marketing of the product with specific prescribing 
information for specific indications.  That is, the approval will be limited to the conditions of use (e.g., patient population, 
indication) described in the FDA-approved labeling. Further, depending on the specific risk(s) to be addressed, the FDA may 
require that contraindications, warnings or precautions be included in the product labeling, require that post-approval trials, 
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including Phase 4 clinical trials, be conducted to further assess a product’s safety after approval, require testing and surveillance 
programs to monitor the product after commercialization or impose other conditions, including distribution and use restrictions 
or other risk management mechanisms under a REMS which can materially affect the potential market and profitability of the 
product. The FDA may prevent or limit further marketing of a product based on the results of post-marketing trials or 
surveillance programs. After approval, some types of changes to the approved product, such as adding new indications, 
manufacturing changes and additional labeling claims, are subject to further testing requirements and FDA review and 
approval. 
Under the Ensuring Innovation Act, which was signed into law in April 2021, the FDA must publish action packages 
summarizing its decisions to approve new drugs within 30 days of approval of such products. To date, CRLs are not publicly 
available documents.
Post-Approval Regulation
Drugs manufactured or distributed pursuant to FDA approvals are subject to pervasive and continuing regulation by the 
FDA, including, among other things, requirements relating to recordkeeping, periodic reporting, product sampling and 
distribution, advertising and promotion and reporting of adverse experiences with 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 user fee requirements for any marketed products and the establishments at which such 
products are manufactured, as well as new application fees for supplemental applications with clinical data.
In addition, manufacturers and other entities involved in the manufacture and distribution of approved products are 
required to register their establishments with the FDA and state agencies, and are subject to periodic unannounced inspections 
by the FDA and these state agencies for compliance with cGMP requirements. Changes to the manufacturing process are 
strictly regulated and often require prior FDA approval before being implemented. FDA regulations also require investigation 
and correction of any deviations from cGMP and impose reporting and documentation requirements upon the sponsor and any 
third party manufacturers that the sponsor may decide to use. Accordingly, manufacturers must continue to expend time, 
money, and effort in the area of production and quality control to maintain cGMP compliance.
Once an approval is granted, the FDA may withdraw the approval if compliance with regulatory requirements and 
standards is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown 
problems with a product, including adverse events of unanticipated severity or frequency, or with manufacturing processes, or 
failure to comply with regulatory requirements, may result in revisions to the approved labeling to add new safety information; 
imposition of post-market studies or clinical trials to assess new safety risks; or imposition of distribution 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;
•
safety alerts, Dear Healthcare Provider letters, press releases or other communications containing warnings or other 
safety information about a product;
•
mandated modification of promotional materials and labeling and issuance of corrective information;
•
fines, warning letters, untitled letters or other enforcement-related letters or clinical holds on post-approval clinical 
trials;
•
refusal of the FDA to approve pending NDAs or supplements to approved NDAs, or suspension or revocation of 
product license approvals;
•
product seizure or detention, or refusal to permit the import or export of products; 
•
injunctions or the imposition of civil or criminal penalties; and
•
consent decrees, corporate integrity agreements, debarment, or exclusion from federal health care programs.
The FDA strictly regulates the marketing, labeling, advertising and promotion of products that are placed on the market. 
Products may be promoted only for the approved indications and in accordance with the provisions of the approved label. In 
September 2021, the FDA published final regulations which describe the types of evidence that the agency will consider in 
determining the intended use of a drug. The FDA and other agencies actively enforce the laws and regulations prohibiting the 
promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject to 
significant liability. 
It may be permissible, under very specific, narrow conditions, for a manufacturer to engage in nonpromotional, non-
misleading communication regarding off-label information, such as distributing scientific or medical journal information. 
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Moreover, with passage of the Pre-Approval Information Exchange Act, or PIE Act, in December 2022, sponsors of products 
that have not been approved may proactively communicate to payors certain information about products in development to help 
expedite patient access upon product approval. Previously, such communications were permitted under FDA guidance but the 
new legislation explicitly provides protection to sponsors who convey certain information about products in development to 
payors, including unapproved uses of approved products. In addition, in January 2025, the FDA published final guidance 
outlining its policies governing the distribution of scientific information to healthcare providers about unapproved uses of 
approved products. The final guidance calls for such communications to be truthful, non-misleading and scientifically sound 
and to include all information necessary for healthcare providers to interpret the strengths and weaknesses and validity and 
utility of the information about the unapproved use of the approved product. If a company engages in such communications 
consistent with the guidance’s recommendations, the FDA indicated that it will not treat such communications as evidence of 
unlawful promotion of a new intended use for the approved product.
If a company is found to have promoted off-label uses, it may become subject to adverse public relations and 
administrative and judicial enforcement by the FDA, the Department of Justice, or the Office of the Inspector General of the 
Department of Health and Human Services, as well as state authorities. This could subject a company to a range of penalties 
that could have a significant commercial impact, including civil and criminal fines and agreements that materially restrict the 
manner in which a company promotes or distributes drug products. 
Generic Drugs and Regulatory Exclusivity
In 1984, as part of the FDCA, Congress established an abbreviated regulatory scheme authorizing the FDA to approve 
generic drugs that are shown to contain the same active ingredients as, and to be bioequivalent to, drugs previously approved by 
the FDA pursuant to NDAs and it also enacted Section 505(b)(2). To obtain approval of a generic drug, a sponsor must submit 
an abbreviated new drug application, or ANDA, to the FDA. In support of such applications, a generic manufacturer may rely 
on the preclinical and clinical testing conducted for a drug product previously approved under an NDA, known as the reference 
listed drug, or RLD.
Specifically, in order for an ANDA to be approved, the FDA must find that the generic version is identical to the RLD 
with respect to the active ingredients, the route of administration, the dosage form, the strength of the drug and the conditions of 
use of the drug. At the same time, the FDA must also determine that the generic drug is “bioequivalent” to the innovator drug. 
Under the statute, a generic drug is bioequivalent to a RLD if “the rate and extent of absorption of the drug do not show a 
significant difference from the rate and extent of absorption of the listed drug.” Upon approval of an ANDA, the FDA indicates 
whether the generic product is “therapeutically equivalent” to the RLD in its publication “Approved Drug Products with 
Therapeutic Equivalence Evaluations,” also referred to as the “Orange Book.” Physicians and pharmacists consider a 
therapeutic equivalent generic drug to be fully substitutable for the RLD. 
Under provisions of the FDCA, the FDA may not approve an ANDA or 505(b)(2) application until any applicable period 
of regulatory exclusivity for the RLD has expired. The FDCA provides a period of five years of regulatory exclusivity for a new 
drug containing a new chemical entity, or NCE. For the purposes of this provision, FDA has consistently taken the position that 
an NCE is a drug that contains no active moiety that has previously been approved by the FDA in any other NDA. This 
interpretation was confirmed with enactment of the Ensuring Innovation Act in April 2021. An active moiety is the molecule or 
ion responsible for the physiological or pharmacological action of the drug substance. In cases where such NCE exclusivity has 
been granted, a generic or follow-on drug application may not be filed with the FDA until the expiration of five years unless the 
submission is accompanied by a Paragraph IV certification, in which case the sponsor may submit its application four years 
following the original product approval. 
The FDCA also provides for a period of three years of regulatory exclusivity if the NDA includes reports of one or more 
new clinical investigations, other than bioavailability or bioequivalence studies, which were conducted by or for the sponsor 
and are essential to the approval of the application. This three-year exclusivity period often protects changes to a previously 
approved drug product, such as new indications, dosage forms, route of administration or combination of ingredients. Three-
year exclusivity would be available for a drug product that contains a previously approved active moiety, provided the statutory 
requirement for a new clinical investigation is satisfied. Unlike five-year NCE exclusivity, an award of three-year exclusivity 
does not block the FDA from accepting ANDAs or 505(b)(2) NDAs seeking approval for generic versions of the drug as of the 
date of approval of the original drug product; rather, this three-year exclusivity covers only the conditions of use associated 
with the new clinical investigations and, as a general matter, does not prohibit the FDA from approving follow-on applications 
for drugs containing the original active ingredient.
Five-year and three-year exclusivity also will not delay the submission or approval of a traditional NDA filed under 
Section 505(b)(1) of the FDCA; however, a sponsor submitting a traditional NDA would be required to conduct or obtain a 
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right of reference to all of the preclinical studies and adequate and well-controlled clinical trials necessary to demonstrate safety 
and effectiveness.
As part of the submission of an NDA or certain supplemental applications, NDA sponsors are required to list with the 
FDA each patent with claims that cover the sponsor’s product or an approved method of using the product. Upon approval of a 
new drug, each of the patents listed in the application for the drug is then published in the Orange Book. The FDA’s regulations 
governing patent listings were largely codified into law with enactment of the Orange Book Modernization Act in January 
2021. When an ANDA applicant files its application with the FDA, the applicant is required to certify to the FDA concerning 
any patents listed for the reference product in the Orange Book. Specifically, the ANDA applicant must certify that: (i) the 
required patent information has not been filed; (ii) the listed patent has expired; (iii) the listed patent has not expired, but will 
expire on a particular date and approval is sought after patent expiration; or (iv) the listed patent is invalid or will not be 
infringed by the new product. Moreover, to the extent that the Section 505(b)(2) NDA applicant is relying on studies conducted 
for an already approved product, the applicant also is required to certify to the FDA concerning any patents listed for the NDA-
approved product in the Orange Book to the same extent that an ANDA applicant would.
If the generic drug or follow-on drug applicant does not challenge the innovator’s listed patents, the FDA will not approve 
the ANDA or 505(b)(2) application until all the listed patents claiming the referenced product have expired. A certification that 
the new generic product will not infringe the already approved product’s listed patents or that such patents are invalid or 
unenforceable is called a Paragraph IV certification. If the ANDA applicant has provided a Paragraph IV certification to the 
FDA, the applicant must also send notice of the Paragraph IV certification to the NDA owner and patent holders once the 
ANDA has been accepted for filing by the FDA. The NDA owner and patent holders may then initiate a patent infringement 
lawsuit in response to the notice of the Paragraph IV certification. The filing of a patent infringement lawsuit within 45 days 
after the receipt of a Paragraph IV certification automatically prevents the FDA from approving the ANDA or 505(b)(2) NDA 
until the earliest of 30 months after the receipt of the Paragraph IV notice, expiration of the patent and a decision in the 
infringement case that is favorable to the ANDA or 505(b)(2) NDA applicant.
Orphan Drug Designation and Exclusivity
Under the Orphan Drug Act, the FDA may designate a drug product as an “orphan drug” if it is intended to treat a rare 
disease or condition generally meaning that it affects fewer than 200,000 individuals in the United States, or more in cases in 
which there is no reasonable expectation that the cost of developing and making a drug product available in the United States 
for treatment of the disease or condition will be recovered from sales of the product. A company must request orphan drug 
designation before submitting an NDA for the candidate product. If the request is granted, the FDA will disclose the identity of 
the therapeutic agent and its potential use. Orphan drug designation does not shorten the Prescription Drug User Fee Act, or 
PDUFA, goal dates for the regulatory review and approval process, although it does convey certain advantages such as tax 
benefits and exemption from the PDUFA application fee.
If a product with orphan designation receives the first FDA approval for the disease or condition for which it has such 
designation or for a select indication or use within the rare disease or condition for which it was designated, the product 
generally will receive orphan drug exclusivity. Orphan drug exclusivity means that the FDA may not approve another sponsor’s 
marketing application for the same drug for the same indication for seven years, except in certain limited circumstances. 
Orphan exclusivity does not block the approval of a different product for the same rare disease or condition, nor does it block 
the approval of the same product for different indications. If a drug designated as an orphan drug ultimately receives marketing 
approval for an indication broader than what was designated in its orphan drug application, it may not be entitled to exclusivity. 
Orphan exclusivity will not bar approval of another product under certain circumstances, including if a subsequent 
product with the same drug for the same indication is shown to be clinically superior to the approved product on the basis of 
greater efficacy or safety, or providing a major contribution to patient care, or if the company with orphan drug exclusivity is 
not able to meet market demand. This is the case despite an earlier court opinion holding that the Orphan Drug Act 
unambiguously required the FDA to recognize orphan drug exclusivity regardless of a showing of clinical superiority. Under 
Omnibus legislation signed by President Trump on December 27, 2020, the requirement for a product to show clinical 
superiority applies to drugs that received orphan drug designation before enactment of FDARA in 2017, but have not yet been 
approved or licensed by FDA.
In September 2021, the Court of Appeals for the 11th Circuit, in Catalyst Pharms, Inc. v. Becerra, or Catalyst, held that, 
for the purpose of determining the scope of orphan drug exclusivity, the term “same disease or condition” in the statute means 
the designated “rare disease or condition” and could not be interpreted by the FDA to mean the “indication or use.” Although 
there have been legislative proposals to overrule this decision, they have not been enacted into law. On January 23, 2023, the 
FDA announced that, in matters beyond the scope of the Catalyst court order, the FDA will continue to apply its existing 
regulations tying orphan-drug exclusivity to the uses or indications for which the orphan drug is approved. More recently 
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however, on February 14, 2025, a federal district court in Washington, DC fully embraced the reasoning of the Catalyst 
decision in another decision challenging the scope of orphan drug exclusivity. The implications of this decision, and its impact 
on the FDA’s implementation of the Orphan Drug Act, are unclear at this point. 
Pediatric Exclusivity
Pediatric exclusivity is another type of non-patent marketing exclusivity in the United States and, if granted, provides for 
the attachment of an additional six months of regulatory exclusivity, including orphan exclusivity. For drug products, the six-
month exclusivity may be attached to the term of any existing patent or regulatory exclusivity available under provisions of the 
FDCA. This six-month exclusivity may be granted if an NDA sponsor submits pediatric data that fairly respond to a written 
request from the FDA for such data. The data do not need to show the product to be effective in the pediatric population 
studied; rather, if the clinical trial is deemed to fairly respond to the FDA’s request, the additional protection is granted. If 
reports of requested pediatric studies are submitted to and accepted by the FDA within the statutory time limits, whatever 
statutory or regulatory periods of exclusivity or patent protection cover the product are extended by six months. This is not a 
patent term extension, but it effectively extends the regulatory period during which the FDA cannot approve another 
application.  
Patent Term Restoration and Extension
A patent claiming a new drug product may be eligible for a limited patent term extension under provisions of the FDCA, 
which permits a patent restoration of up to five years for patent term lost during product development and the FDA regulatory 
review. The restoration period granted on a patent covering a product is typically one-half the time between the effective date of 
an IND and the submission date of an NDA, plus the time between the submission date of an NDA and the ultimate approval 
date. Patent term restoration cannot be used to extend the remaining term of a patent past a total of 14 years from the product’s 
approval date. Only one patent applicable to an approved product is eligible for the extension, and the application for the 
extension must be submitted prior to the expiration of the patent in question. A patent that covers multiple products for which 
approval is sought can only be extended in connection with one of the approvals. The United States Patent and Trademark 
Office reviews and approves the application for any patent term extension or restoration in consultation with the FDA.
FDA Approval of Companion Diagnostics
If safe and effective use of a therapeutic depends on an in vitro diagnostic, then the FDA generally will require approval 
or clearance of that diagnostic, known as a companion diagnostic, 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 diagnostics. According to the guidance, if the FDA determines that a 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 companion diagnostic device is not approved or cleared for 
that indication. Approval or clearance of the companion diagnostic device will ensure that the device has been adequately 
evaluated and has adequate performance characteristics in the intended population. 
In April 2020, the FDA issued additional guidance which describes considerations for the development and labeling of 
companion diagnostic devices to support the indicated uses of multiple drug or biological oncology products, when appropriate. 
This guidance builds upon existing policy regarding the labeling of companion diagnostics. In its 2014 guidance, the FDA 
stated that if evidence is sufficient to conclude that the companion diagnostic is appropriate for use with a specific group of 
therapeutic products, the companion diagnostic’s intended use/indications for use should name the specific group of therapeutic 
products, rather than specific products. The 2020 guidance expands on the policy statement in the 2014 guidance by 
recommending that companion diagnostic developers consider a number of factors when determining whether their test could 
be developed, or the labeling for approved companion diagnostics could be revised through a supplement, to support a broader 
labeling claim such as use with a specific group of oncology therapeutic products (rather than listing an individual therapeutic 
product(s)).
Under the FDCA, in vitro diagnostics, including companion diagnostics, are regulated as medical devices. In the United 
States, the FDCA and its implementing regulations, and other federal and state statutes and regulations govern, among other 
things, medical device design and development, preclinical and clinical testing, premarket clearance or approval, registration 
and listing, manufacturing, labeling, storage, advertising and promotion, sales and distribution, export and import, and 
post-market surveillance. Unless an exemption applies, diagnostic tests require marketing clearance or approval from the FDA 
prior to commercial distribution. 
The FDA previously has required in vitro companion diagnostics intended to select the patients who will respond to the 
drug candidate to obtain pre-market approval, or PMA, simultaneously with approval of the therapeutic drug candidate. The 
PMA process, including the gathering of clinical and preclinical data and the submission to and review by the FDA, can take 
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several years or longer. It involves a rigorous premarket review during which the sponsor must prepare and provide the FDA 
with reasonable assurance of the device’s safety and effectiveness and information about the device and its components 
regarding, among other things, device design, manufacturing and labeling. PMA applications are subject to an application fee. 
For federal fiscal year 2025, the standard fee is $540,783 and the small business fee is $135,196.
After a device is placed on the market, it remains subject to significant regulatory requirements. Medical devices may be 
marketed only for the uses and indications for which they are cleared or approved. Device manufacturers must also establish 
registration and device listings with the FDA. A medical device manufacturer’s manufacturing processes and those of its 
suppliers are required to comply with the applicable portions of the Quality System Regulation, which covers the methods and 
documentation of the design, testing, production, processes, controls, quality assurance, labeling, packaging, and shipping of 
medical devices. Domestic facility records and manufacturing processes are subject to periodic unscheduled inspections by the 
FDA. The FDA also may inspect foreign facilities that export products to the United States.
It is possible that an in vitro companion diagnostic device could be subject to FDA enforcement discretion from 
compliance with the FDCA if it meets the definition of a Laboratory Developed Test, or LDT. However, FDA issued a final 
rule in April 2024 to end enforcement discretion for LDTs and actively regulate such products as medical devices. Under this 
final rule, LDTs are required to come into compliance with the FDA’s medical device regulatory requirements in a staged 
approach over the course of four years. The implementation of this LDT final rule could potentially be affected by the 
Executive Order, Regulatory Freeze Pending Review, issued by President Trump on January 20, 2025 and/or the anticipated 
change in leadership at the FDA under the new administration. Further, while the final regulation is set to take effect on May 6, 
2025, a number of parties have challenged the legality of the LDT regulation in a federal district court. That court held a 
hearing on this matter on February 19, 2025, and is expected to issue a ruling soon.
Review and Approval of Drug Products in the European Union
In addition to regulations in the U.S., a sponsor will be subject to a variety of foreign regulations governing clinical trials 
and commercial sales and distribution of its products outside of the U.S. Whether or not a sponsor obtains FDA approval for a 
drug candidate, the sponsor must obtain approval by the comparable regulatory authorities of foreign countries or economic 
areas, such as the EU, before commencing clinical trials or marketing products in those countries or areas. In the EU, drug 
candidates also may be subject to extensive regulatory requirements. As in the U.S., medicinal products can be marketed only if 
a marketing authorization from the competent regulatory agencies has been obtained. Similar to the U.S., the various phases of 
preclinical and clinical research in the EU are subject to significant regulatory controls.  
With the exception of the EU/European Economic Area, or EEA, applying the harmonized regulatory rules for medicinal 
products, the approval process and requirements governing the conduct of clinical trials, product licensing, pricing, and 
reimbursement vary greatly between countries and jurisdictions and can involve additional testing and additional administrative 
review periods. The time required to obtain approval in other countries and jurisdictions might differ from and be longer than 
that required to obtain FDA approval. Regulatory approval in one country or jurisdiction does not ensure regulatory approval in 
another, but a failure or delay in obtaining regulatory approval in one country or jurisdiction may negatively impact the 
regulatory process in others.
Clinical Trial Approval in the EU
On January 31, 2022, the new Clinical Trials Regulation (EU) No 536/2014, or CTR, became effective in the EU and 
replaced the prior Clinical Trials Directive 2001/20/EC. The new regulation aims at simplifying and streamlining the 
authorization, conduct and transparency of clinical trials in the EU. Under the new coordinated procedure for the approval of 
clinical trials, the sponsor of a clinical trial to be conducted in more than one Member State of the EU, or EU Member State, 
will only be required to submit a single application for approval. The submission will be made through the Clinical Trials 
Information System, a new clinical trials portal overseen by the European Medicines Agency, or EMA, and available to clinical 
trial sponsors, competent authorities of the EU Member States and the public. 
Beyond streamlining the process, the new regulation includes a single set of documents to be prepared and submitted for 
the application as well as simplified reporting procedures for clinical trial sponsors, and a harmonized procedure for the 
assessment of applications for clinical trials, which is divided in two parts. Part I is assessed by the competent authorities of all 
EU Member States in which an application for authorization of a clinical trial has been submitted, or Member States concerned. 
Part II is assessed separately by each Member State concerned. Strict deadlines have been established for the assessment of 
clinical trial applications. The role of the relevant ethics committees in the assessment procedure will continue to be governed 
by the national law of the concerned EU Member State. However, overall related timelines will be defined by the CTR.
The new regulation did not change the preexisting requirement that a sponsor must obtain prior approval from the 
competent national authority of the EU Member State in which the clinical trial is to be conducted. If the clinical trial is 
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conducted in different EU Member States, the competent authorities in each of these EU Member States must provide their 
approval for the conduct of the clinical trial. Furthermore, the sponsor may only start a clinical trial at a specific clinical site 
after the applicable ethics committee has issued a favorable opinion.
As of January 31, 2025, all clinical trials (including those which are ongoing) are subject to the provisions of the CTR. 
The failure to transition ongoing clinical trials to the CTR can result in corrective measures under Article 77 of the CTR, 
including revocation of the authorization of the clinical trial or suspension of the clinical trial as well as criminal sanctions and 
fines under national law of EU Member States.
As in the US, parties conducting certain clinical trials must post clinical trial information in the European Union at the 
EudraCT website: https://eudract.ema.europa.eu.
PRIME Designation in the EU
In March 2016, the EMA launched an initiative to facilitate development of drug candidates in indications, often rare, for 
which few or no therapies currently exist. The PRIority MEdicines, or PRIME, scheme is intended to encourage drug 
development in areas of unmet medical need and provides accelerated assessment of products representing substantial 
innovation reviewed under the centralized procedure. Products from small and medium-sized enterprises, or SMEs, may qualify 
for earlier entry into the PRIME scheme than larger companies. Many benefits accrue to sponsors of drug candidates with 
PRIME designation, including but not limited to, early and proactive regulatory dialogue with the EMA, frequent discussions 
on clinical trial designs and other development program elements, and accelerated marketing authorization application 
assessment once a dossier has been submitted. Importantly, a dedicated Agency contact and rapporteur from the CHMP or 
Committee for Advanced Therapies, or CAT, are appointed early in PRIME scheme facilitating increased understanding of the 
product at EMA’s Committee level. 
Pediatric Studies
In the EEA, companies developing a new medicinal product must agree upon a Pediatric Investigation Plan, or PIP, with 
the EMA’s pediatric committee, or PDCO, and must conduct pediatric clinical trials in accordance with that PIP, unless a 
waiver applies (e.g., because the relevant disease or condition occurs only in adults). The PIP sets out the timing and measures 
proposed to generate data to support a pediatric indication of the drug for which marketing authorization is being sought. The 
marketing authorization application for the product must include the results of pediatric clinical trials conducted in accordance 
with the PIP, unless a waiver applies, or a deferral has been granted by the PDCO 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, in which 
case the pediatric clinical trials must be completed at a later date. 
Marketing Authorization
In the EEA, marketing authorizations, or MAs, for medicinal products may be obtained through several different 
procedures founded on the same basic regulatory process.
The centralized procedure provides for the grant of a single MA that is valid for all EU Member States. The centralized 
procedure is compulsory for medicinal products produced by certain biotechnological processes, products designated as orphan 
medicinal products, and products with a new active substance indicated for the treatment of certain diseases, including cancer. It 
is optional for those products that are highly innovative or for which a centralized process is in the interest of patients. 
Under the centralized procedure in the EU, the maximum timeframe for the evaluation of an MA application is 210 days, 
excluding clock stops, when additional written or oral information is to be provided by the sponsor in response to questions 
asked by the CHMP. Accelerated evaluation may be granted by the CHMP in exceptional cases. These are defined as 
circumstances in which a medicinal product is expected to be of a “major public health interest.” Three cumulative criteria must 
be fulfilled in such circumstances: the seriousness of the disease, such as severely disabling or life-threatening diseases, to be 
treated; the absence or insufficiency of an appropriate alternative therapeutic approach; and anticipation of high therapeutic 
benefit. In these circumstances, the EMA ensures that the opinion of the CHMP is given within 150 days.
The decentralized procedure provides for approval by one or more other concerned EU Member States of an assessment 
of an application for MA conducted by one EU Member State, known as the reference EU Member State. In accordance with 
this procedure, a sponsor submits an application for MA to the reference EU Member State and the concerned EU Member 
States. This application is identical to the application that would be submitted to the EMA for authorization through the 
centralized procedure. The reference EU Member State prepares a draft assessment and drafts of the related materials within 
120 days after receipt of a valid application. The resulting assessment report is submitted to the concerned EU Member States 
which, within 90 days of receipt, must decide whether to approve the assessment report and related materials. 
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If a concerned EU Member State cannot approve the assessment report and related materials due to concerns relating to a 
potential serious risk to public health, disputed elements may be referred to the European Commission, whose decision is 
binding on all EU Member States.
A MA may be granted only to a sponsor established in the EU. Regulation No. 1901/2006 provides that prior to obtaining 
a MA in the EU, a sponsor must demonstrate compliance with all measures included in a Pediatric Investigation Plan, or PIP, 
approved by the Pediatric Committee of the EMA, covering all subsets of the pediatric population, unless the EMA has granted 
a product-specific waiver, class waiver, or a deferral for one or more of the measures included in the PIP. 
Conditional Marketing Authorization
In particular circumstances, EU legislation (Article 14–a Regulation (EC) No 726/2004 (as amended by Regulation (EU) 
2019/5 and Regulation (EC) No 507/2006 on Conditional Marketing Authorizations for Medicinal Products for Human Use) 
enables sponsors to obtain a CMA prior to obtaining the comprehensive clinical data required for an application for a full MA. 
Such conditional approvals may be granted for drug candidates (including medicines designated as orphan medicinal products) 
if (1) the drug candidate is intended for the treatment, prevention or medical diagnosis of seriously debilitating or life-
threatening diseases; (2) the drug candidate is intended to meet unmet medical needs of patients; (3) a CMA may be granted 
prior to submission of comprehensive clinical data provided that the benefit of the immediate availability on the market of the 
medicinal product concerned outweighs the risk inherent in the fact that additional data are still required; (4) the risk-benefit 
balance of the drug candidate is positive, and (5) it is likely that the sponsor will be in a position to provide the required 
comprehensive clinical trial data. A CMA may contain specific obligations to be fulfilled by the CMA holder, including 
obligations with respect to the completion of ongoing or new studies and with respect to the collection of pharmacovigilance 
data. CMAs are valid for one year, and may be renewed annually, if the risk-benefit balance remains positive, and after an 
assessment of the need for additional or modified conditions or specific obligations. The timelines for the centralized procedure 
described above also apply with respect to the review by the CHMP of applications for a CMA.
Exceptional Circumstances
An 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 CMA as it is reserved to 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 an MA However, unlike the CMA, 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. Under these procedures, before 
granting the MA, the EMA or the competent authorities of the member states make an assessment of the risk-benefit balance of 
the product on the basis of scientific criteria concerning its quality, safety, and efficacy. 
Periods of Authorization and Renewals
An MA is valid for five years in principle and 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 authorizing 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 nine months before the MA ceases to be valid. 
Once renewed, the MA is valid for an unlimited period, unless the European Commission or the competent authority decides, 
on justified grounds relating to pharmacovigilance, to proceed with one additional five-year renewal. Any authorization which 
is not followed by the actual placing of the drug on the EU market (in case of centralized procedure) or on the market of the 
authorizing member state within three years after authorization ceases to be valid (the so-called sunset clause).
Regulatory Requirements After Marketing Authorization
Following MA of a medicinal product in the EU, the holder of the authorization is required to comply with a range of 
requirements applicable to the manufacturing, marketing, promotion and sale of medicinal products. These include compliance 
with the EU’s stringent pharmacovigilance or safety reporting, as well as rules potentially requiring post-authorization studies 
and additional monitoring obligations. In addition, the manufacturing of authorized medicinal products, for which a separate 
manufacturer’s license is mandatory, must also be conducted in strict compliance with the applicable EU laws, regulations and 
guidance, including Directive 2001/83/EC, Directive 2003/94/EC, Regulation (EC) No 726/2004 and the European 
Commission Guidelines for Good Manufacturing Practice. These requirements include compliance with EU cGMP standards 
when manufacturing medicinal products and active pharmaceutical ingredients, including the manufacture of active 
pharmaceutical ingredients outside of the EU with the intention to import the active pharmaceutical ingredients into the EU. 
Finally, the marketing and promotion of authorized drugs, including industry-sponsored continuing medical education and 
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advertising directed toward the prescribers of drugs and/or the general public, are strictly regulated in the EU notably under 
Directive 2001/83EC, as amended, and EU Member State laws. Direct-to-consumer advertising of prescription medicines is 
prohibited across the EU.
Regulatory Data Exclusivity in the European Union
In the EU, new chemical entities approved on the basis of a complete independent data package qualify for eight years of 
data exclusivity upon MA and an additional two years of market exclusivity pursuant to Regulation (EC) No 726/2004, as 
amended, and Directive 2001/83/EC, as amended. Data exclusivity prevents regulatory authorities in the EU from referencing 
the innovator’s data to assess a generic (abbreviated) application for a period of eight years. During the additional two-year 
period of market exclusivity, a generic MA application can be submitted, and the innovator’s data may be referenced, but no 
generic medicinal product can be marketed until the expiration of the market exclusivity. The overall ten-year period will be 
extended to a maximum of eleven years if, during the first eight years of those ten years, the MA holder obtains an 
authorization for one or more new therapeutic indications which, during the scientific evaluation prior to authorization, is held 
to bring a significant clinical benefit in comparison with existing therapies. 
The EU pharmaceutical legislation is currently undergoing a complete review process, in the context of the 
Pharmaceutical Strategy for Europe initiative, launched by the European Commission in November 2020. The European 
Commission’s proposal for revision of several legislative instruments related to medicinal products was published in April 2023 
and includes, among other things, provisions that would potentially reduce the duration of regulatory data protection. The 
European Parliament requested several amendments in April 2024. At this time, the proposed revisions remain to be agreed and 
adopted by the European Parliament and European Council and the proposals may therefore be substantially revised before 
adoption, which is not anticipated before early 2026. The revisions may, however, have a significant impact on the 
pharmaceutical industry in the long term, if and when adopted.
Pediatric Exclusivity
Products that are granted a MA with the results of the pediatric clinical trials conducted in accordance with the PIP are 
eligible for a six-month extension of the protection under a supplementary protection certificate (if any is in effect at the time of 
approval) even where the trial results are negative. In the case of orphan medicinal products, a two-year extension of the orphan 
market exclusivity may be available. This pediatric reward is subject to specific conditions and is not automatically available 
when data in compliance with the PIP are developed and submitted.
Orphan Drug Designation and Exclusivity in the EU
Regulation (EC) No 141/2000 and Regulation (EC) No. 847/2000 provide that a product can be designated an orphan 
medicinal product by the European Commission if its sponsor can establish: that the product is intended for the diagnosis, 
prevention or treatment of (1) a life-threatening or chronically debilitating condition affecting not more than five in ten 
thousand persons in the EU when the application is made, or (2) a life-threatening, seriously debilitating or serious and chronic 
condition in the EU and that without incentives the medicinal product is unlikely to be developed. For either of these 
conditions, the sponsor must demonstrate that there exists no satisfactory method of diagnosis, prevention or treatment of the 
condition in question that has been authorized in the EU or, if such method exists, the medicinal product will be of significant 
benefit to those affected by that condition. 
Once authorized, orphan medicinal products are entitled to ten years of market exclusivity in all EU Member States and in 
addition a range of other benefits during the development and regulatory review process including scientific assistance for trial 
protocols, authorization through the centralized MA procedure covering all member countries and a reduction or elimination of 
registration and MA fees. However, MA may be granted to a similar medicinal product with the same orphan indication during 
the ten-year period with the consent of the MA holder for the original orphan medicinal product or if the manufacturer of the 
original orphan medicinal product is unable to supply sufficient quantities. MA may also be granted to a similar medicinal 
product with the same orphan indication if the product is safer, more effective or otherwise clinically superior to the original 
orphan medicinal product. The period of market exclusivity may, in addition, be reduced to six years if it can be demonstrated 
on the basis of available evidence that the original orphan medicinal product is sufficiently profitable not to justify maintenance 
of market exclusivity.
Orphan drug exclusivity will not bar approval of another product under certain circumstances, including if a subsequent 
product with the same drug for the same indication is shown to be clinically superior to the approved product on the basis of 
greater efficacy or safety, or providing a major contribution to patient care, or if the company with orphan drug exclusivity is 
not able to meet market demand. This is the case despite an earlier court opinion holding that the Orphan Drug Act 
unambiguously required the FDA to recognize orphan exclusivity regardless of a showing of clinical superiority.
Patent Term Extensions
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The EU also provides for patent term extension through Supplementary Protection Certificates, or SPCs. The rules and 
requirements for obtaining a SPC are similar to those in the U.S. An SPC may extend the term of a patent for up to five years 
after its originally scheduled expiration date and can provide up to a maximum of fifteen years of marketing exclusivity for a 
drug. In certain circumstances, these periods may be extended for six additional months if pediatric exclusivity is obtained. 
Although SPCs are available throughout the EU, sponsors must apply on a country-by-country basis. Similar patent term 
extension rights exist in certain other foreign jurisdictions outside the EU.
Reimbursement and Pricing of Prescription Pharmaceuticals
In the EU, similar political, economic, and regulatory developments to those in the U.S. may affect our ability to 
profitably commercialize our drug candidates, if approved. In markets outside of the U.S. and the EU, reimbursement and 
healthcare payment systems vary significantly by country and many countries have instituted price ceilings on specific products 
and therapies. In many countries, including those of the EU, the pricing of prescription pharmaceuticals is subject to 
governmental control and access. 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, 
pharmaceutical firms may be required to conduct a clinical trial that compares the cost-effectiveness of the product to other 
available therapies.
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. An EU Member State may 
approve a specific price for a product, or it may instead adopt a system of direct or indirect controls on the profitability of the 
company placing the product on the market. Other Member States allow companies to fix their own prices for products but 
monitor and control prescription volumes and issue guidance to physicians to limit prescriptions. Recently, many countries in 
the EU have increased the amount of discounts required on pharmaceuticals and these efforts could continue as countries 
attempt to manage healthcare expenditures, especially in light of the severe fiscal and debt crises experienced by many 
countries in the EU. The downward pressure on healthcare costs in general, particularly prescription products, has become 
intense. As a result, increasingly high barriers are being established to the entry of new products. Political, economic, and 
regulatory developments may further complicate pricing negotiations, and pricing negotiations may continue after 
reimbursement has been obtained. 
Reference pricing used by various EU Member States, and parallel trade (i.e., arbitrage between low-priced and high-
priced Member States) can further reduce prices. There can be no assurance that any country that has price controls or 
reimbursement limitations for pharmaceutical products will allow favorable reimbursement and pricing arrangements for any 
drug candidates, if approved in those countries. 
Approval of Companion Diagnostic Devices
In the EU, medical devices such as companion diagnostics must comply with the General Safety and Performance 
Requirements, or SPRs, detailed in Annex I of the EU Medical Devices Regulation (Regulation (EU) 2017/745) (MDR), which 
came into force on May 26, 2021, and replaced the previously applicable EU Medical Devices Directive (Council Directive 
93/42/EEC). Compliance with SPRs and additional requirements applicable to companion medical devices is a prerequisite to 
be able to affix the CE Mark of Conformity to medical devices, without which they cannot be marketed or sold. To demonstrate 
compliance with the SPRs, a manufacturer must undergo a conformity assessment procedure, which varies according to the 
type of medical device and its classification. The MDR is meant to establish a uniform, transparent, predictable, and sustainable 
regulatory framework across the EU for medical devices.
Separately, the regulatory authorities in the EU also adopted a new In Vitro Diagnostic Regulation (IVDR) (EU) 
2017/746, which became effective in May 2022. The new regulation replaces the In Vitro Diagnostics Directive (IVDD) 98/79/
EC. Manufacturers wishing to apply to a notified body for a conformity assessment of their in vitro diagnostic medical device 
had until May 2022 to update their technical documentation to meet the requirements and comply with the new, more stringent 
IVDR. The IVDR, among other things: strengthens the rules on placing devices on the market and reinforces surveillance once 
they are available; establishes explicit provisions on manufacturers’ responsibilities for the follow-up of the quality, 
performance, and safety of devices placed on the market; improves the traceability of medical devices throughout the supply 
chain to the end-user or patient through a unique identification number; sets up a central database to provide patients, healthcare 
professionals, and the public with comprehensive information on products available in the EU; and strengthens rules for the 
assessment of certain high-risk devices, such as implants, which may have to undergo an additional check by experts before 
they are placed on the market.
Brexit and the Regulatory Framework in the United Kingdom
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The United Kingdom’s (UK) withdrawal from the EU, commonly referred to as Brexit, took place on January 31, 2020. 
The EU and the UK reached an agreement on their new partnership in the Trade and Cooperation Agreement, which entered 
into force on May 1, 2021. As of January 1, 2021, the Medicines and Healthcare Products Regulatory Agency, or the MHRA, 
became responsible for supervising medicines and medical devices in Great Britain, comprising England, Scotland and Wales 
under domestic law, whereas Northern Ireland continues to be subject to EU rules under the Northern Ireland Protocol, as 
amended by the so called Windsor Framework agreed in February 2023. As of January 1, 2025, the changes introduced by the 
Windsor Framework resulted in the MHRA being responsible for approving all medicinal products destined for the UK market 
(Great Britain and Northern Ireland), and the EMA will no longer have any role in approving medicinal products destined for 
Northern Ireland. The MHRA relies on the Human Medicines Regulations 2012 (SI 2012/1916) (as amended), or the HMR, as 
the basis for regulating medicines. The HMR has incorporated into the domestic law the body of EU law instruments governing 
medicinal products that pre-existed prior to the UK’s withdrawal from the EU. 
As of January 1, 2024 on, a new international recognition procedure, or IRP, applies which intends to facilitate approval 
of pharmaceutical products in the UK. The IRP is open to applicants that have already received an authorization for the same 
product from one of the MHRA’s specified Reference Regulators, or RRs. The RRs notably include EMA and regulators in the 
EEA member states for approvals in the EU centralized procedure and mutual recognition procedure as well as the FDA (for 
product approvals granted in the U.S.). The RR assessment must have undergone a full and standalone review. RR assessments 
based on reliance or recognition cannot be used to support an IRP application. A CHMP positive opinion or an MRDC positive 
end of procedure outcome is an RR authorization for the purposes of IRP.
General Data Protection Regulation
The collection, use, disclosure, transfer, or other processing of personal data regarding individuals in the EEA, including 
personal health data, is subject to the GDPR, which became effective on May 25, 2018. In the UK, the GDPR is retained in 
domestic law as the UK GDPR and sits alongside an amended version of the Data Protection Act of 2018. The GDPR is wide-
ranging in scope and imposes numerous requirements on companies that process personal data, including requirements relating 
to processing health and other sensitive data, obtaining consent of the individuals to whom the personal data relates, providing 
information to individuals regarding data processing activities, implementing safeguards to protect the security and 
confidentiality of personal data, providing notification of data breaches, and taking certain measures when engaging third-party 
processors. The GDPR also imposes strict rules on the transfer of personal data to countries outside the EU, including the U.S., 
and permits data protection authorities to impose large penalties for violations of the GDPR, including potential fines of up to 
€20 million or 4% of annual global revenues of the respective group of companies, whichever is greater. The GDPR also 
confers a private right of action on data subjects and consumer associations to lodge complaints with supervisory authorities, 
seek judicial remedies, and obtain compensation for damages resulting from violations of the GDPR. Compliance with the 
GDPR is a rigorous and time-intensive process that may increase the cost of doing business or require companies to change 
their business practices to ensure full compliance.
For transfers of personal data from the EU to the U.S., the European Commission adopted an adequacy decision for the 
EU-U.S. Data Privacy Framework in July 2023. The adequacy decision permits U.S. companies who self-certify to the EU-U.S. 
Data Privacy Framework to rely on it as a valid data transfer mechanism for data transfers from the EU to the United States. 
However, some privacy advocacy groups have already suggested that they will be challenging the EU-U.S. Data Privacy 
Framework. If these challenges are successful, they may not only impact the EU-U.S. Data Privacy Framework, but also further 
limit the viability of the standard contractual clauses and other data transfer mechanisms. Following the withdrawal of the UK 
from the EU, the UK Data Protection Act 2018 applies to the processing of personal data that takes place in the UK and 
includes parallel obligations to those set forth by GDPR. In relation to data transfers, both the UK and the EU have determined, 
through separate “adequacy” decisions, that data transfers between the two jurisdictions are in compliance with the UK Data 
Protection Act and the GDPR, respectively. The UK and the U.S. have also agreed to a U.S.-UK “Data Bridge”, which 
functions similarly to the EU-U.S. Data Privacy Framework and provides an additional legal mechanism for companies to 
transfer data from the UK to the U.S. Switzerland has also approved an adequacy decision in relation to the Swiss-U.S. Data 
Privacy Framework (which functions similarly to the EU-U.S. Data Privacy Framework and the U.S.-UK Data Bridge in 
relation to data transfers from Switzerland to the U.S.). 
Healthcare Law and Regulation
Health care providers and third party payors play a primary role in the recommendation and prescription of drug products 
that are granted marketing approval. Arrangements with providers, consultants, third party payors and customers are subject to 
broadly applicable fraud and abuse, anti-kickback, false claims laws, patient privacy laws and regulations and other health care 
laws and regulations that may constrain our business and/or financial arrangements. Restrictions under applicable federal and 
state health care laws and regulations, include:
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•
the federal Anti-Kickback Statute, which prohibits, among other things, persons and entities from knowingly and 
willfully soliciting, offering, paying, receiving or providing remuneration, directly or indirectly, in cash or in kind, to 
induce or reward either the referral of an individual for, or the purchase, order or recommendation of, any good or 
service, for which payment may be made, in whole or in part, under a federal health care program such as Medicare 
and Medicaid;
•
the federal civil and criminal false claims laws, including the civil False Claims Act, and civil monetary penalties 
laws, which prohibit individuals or entities from, among other things, knowingly presenting, or causing to be 
presented, to the federal government, claims for payment that are false, fictitious or fraudulent or knowingly making, 
using or causing to made or used a false record or statement to avoid, decrease or conceal an obligation to pay money 
to the federal government;
• the Foreign Corrupt Practices Act, or FCPA, which prohibits companies and their intermediaries from making, or 
offering or promising to make improper payments to non-U.S. officials for the purpose of obtaining or retaining 
business or otherwise seeking favorable treatment; and
•
the federal transparency requirements known as the federal Physician Payments Sunshine Act which requires certain 
manufacturers of drugs, devices, biologics and medical supplies to report annually to the Centers for Medicare & 
Medicaid Services, or CMS, within the HHS information related to payments and other transfers of value made by 
that entity to physicians, other healthcare providers and teaching hospitals, as well as ownership and investment 
interests held by physicians and their immediate family members.
Further, some state laws require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary 
compliance guidelines and the relevant compliance guidance promulgated by the federal government in addition to requiring 
manufacturers to report information related to payments to physicians and other health care providers or marketing 
expenditures. Additionally, some state and local laws require the registration of pharmaceutical sales representatives in the 
jurisdiction. 
Pharmaceutical Insurance Coverage and Healthcare Reform
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 third party payors to reimburse all or part of the associated health 
care costs. Significant uncertainty exists as to the coverage and reimbursement status of products approved by the FDA and 
other government authorities. Thus, even if a drug candidate is approved, sales of the product will depend, in part, on the extent 
to which third party payors, including government health programs in the United States such as Medicare and Medicaid, 
commercial health insurers and managed care organizations, provide coverage and establish adequate reimbursement levels for, 
the product. The process for determining whether a payor will provide coverage for a product may be separate from the process 
for setting the price or reimbursement rate that the payor will pay for the product once coverage is approved. Third party payors 
are increasingly challenging the prices charged, examining the medical necessity and reviewing the cost-effectiveness of 
medical products and services and imposing controls to manage costs. Third party payors may limit coverage to specific 
products on an approved list, also known as a formulary, which might not include all of the approved products for a particular 
indication.
In order to secure coverage and reimbursement for any product that might be approved for sale, a company may need to 
conduct expensive pharmacoeconomic studies in order to demonstrate the medical necessity and cost-effectiveness of the 
product, in addition to the costs required to obtain FDA or other comparable marketing approvals. Nonetheless, drug candidates 
may not be considered medically necessary or cost effective. A decision by a third party payor not to cover a product could 
reduce physician utilization once the product is approved and have a material adverse effect on sales, results of operations and 
financial condition. Additionally, a payor’s decision to provide coverage for a product does not imply that an adequate 
reimbursement rate will be approved. Further, one payor’s determination to provide coverage for a product does not assure that 
other payors will also provide coverage and reimbursement for the product, and the level of coverage and reimbursement can 
differ significantly from payor to payor.
The containment of health care costs also has become a priority of federal, state and foreign governments and the prices of 
products have been a focus in this effort. Governments have shown significant interest in implementing cost-containment 
programs, including price controls, restrictions on reimbursement and requirements for substitution of generic products. 
Adoption of price controls and cost-containment measures, and adoption of more restrictive policies in jurisdictions with 
existing controls and measures, could further limit a company’s revenue generated from the sale of any approved products. 
Coverage policies and third party reimbursement rates may change at any time. Even if favorable coverage and reimbursement 
status is attained for one or more products for which a company or its collaborators receive marketing approval, less favorable 
coverage policies and reimbursement rates may be implemented in the future.
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A primary trend in the U.S. healthcare industry and elsewhere is cost containment. There have been a number of federal 
and state proposals during the last few years regarding the pricing of pharmaceutical and biopharmaceutical products, limiting 
coverage and reimbursement for drugs, government control and other changes to the health care system in the United States. 
In March 2010, President Obama signed into law the Patient Protection and Affordable Care Act, as amended by the 
Health Care and Education Affordability Reconciliation Act, or collectively the ACA. In addition, other legislative changes 
have been proposed and adopted since the ACA was enacted. In August 2011, the Budget Control Act of 2011, among other 
things, created measures for spending reductions by Congress. A Joint Select Committee on Deficit Reduction, tasked with 
recommending a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, was unable to reach required 
goals, thereby triggering the legislation’s automatic reduction to several government programs. These changes included 
aggregate reductions to Medicare payments to providers of up to 2% per fiscal year, which went into effect in April 2013 and 
will remain in effect through 2031. 
Under current legislation, the actual reductions in Medicare payments may vary up to 4%. The Consolidated 
Appropriations Act, which was signed into law by President Biden in December 2022, made several changes to sequestration of 
the Medicare program. Section 1001 of the Act delays the 4% Statutory Pay-As-You-Go Act of 2010 (PAYGO) sequester for 
two years, through the end of calendar year 2024. Triggered by enactment of the American Rescue Plan Act of 2021, the 4% 
cut to the Medicare program would have taken effect in January 2023. The Act’s health care offset title includes Section 4163, 
which extends the 2% Budget Control Act of 2011 Medicare sequester for six months into fiscal year 2032 and lowers the 
payment reduction percentages in fiscal years 2030 and 2031.
Since enactment of the ACA, there have been, and continue to be, numerous legal challenges and Congressional actions to 
repeal and replace provisions of the law. For example, with enactment of the Tax Cuts and Jobs Act of 2017, which was signed 
by President Trump on December 22, 2017, Congress repealed the “individual mandate.” The repeal of this provision, which 
requires most Americans to carry a minimal level of health insurance, became effective in 2019. Further, 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 Patient Protection and Affordable Care Act. Litigation and legislation over the ACA are 
likely to continue, with unpredictable and uncertain results.
During the first Trump Administration, the Congress and administration sought to overturn the ACA and related 
measures. Shortly after taking office in January 2025, President Trump revoked numerous executive orders issued by President 
Biden, including at least two executive orders (e.g.,EO 14009, Strengthening Medicaid and the Affordable Care Act, and EO 
14070, Continuing to Strengthen Americans’ Access to Affordable, Quality Health Coverage) which were designed to further 
implement the ACA. There may be similar efforts to change the ACA, and the accompanying uncertainty, for the foreseeable 
future. 
Pharmaceutical Prices
The prices of prescription pharmaceuticals have also been the subject of considerable discussion in the United States. 
There have been U.S. Congressional inquiries, as well as proposed and enacted state and federal legislation designed to, among 
other things, bring more transparency to pharmaceutical pricing, review the relationship between pricing and manufacturer 
patient programs, and reduce the costs of pharmaceuticals under Medicare and Medicaid. 
In addition, in October 2020, HHS and the FDA published a final rule allowing states and other entities to develop a 
Section 804 Importation Program, or SIP, to import certain prescription drugs from Canada into the United States. That 
regulation was challenged in a lawsuit by the Pharmaceutical Research and Manufacturers of America, or PhRMA, but the case 
was dismissed by a federal district court in February 2023 after the court found that PhRMA did not have standing to sue HHS. 
Seven states (Colorado, Florida, Maine, New Hampshire, New Mexico, Texas and Vermont) have passed laws allowing for the 
importation of drugs from Canada. As of May 2024, five states had submitted Section 804 Importation Program proposals to 
the FDA and, on January 5, 2024, the FDA approved Florida’s plan for Canadian drug importation. That state now has authority 
to import certain drugs from Canada for a period of two years once certain conditions are met. Florida will first need to submit a 
pre-import request for each drug selected for importation, which must be approved by the FDA. The state will also need to 
relabel the drugs and perform quality testing of the products to meet FDA standards. 
Further, on November 20, 2020, HHS finalized a regulation removing safe harbor protection for price reductions from 
pharmaceutical manufacturers to plan sponsors under Part D, either directly or through pharmacy benefit managers, unless the 
price reduction is required by law. The final rule would also eliminate the current safe harbor for Medicare drug rebates and 
create new safe harbors for beneficiary point-of-sale discounts and pharmacy benefit manager service fees. It originally was set 
to go into effect on January 1, 2022, but with passage of the Inflation Reduction Act, or IRA, has been delayed by Congress to 
January 1, 2032.
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On August 16, 2022, the IRA was signed into law by President Biden. The new legislation has implications for Medicare 
Part D, which is a program available to individuals who are entitled to Medicare Part A or enrolled in Medicare Part B to give 
them the option of paying a monthly premium for outpatient prescription drug coverage. Among other things, the IRA requires 
manufacturers of certain drugs to engage in price negotiations with Medicare (beginning in 2026), 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; and replaces the Part D coverage gap discount program with a new discounting program (beginning in 2025). The 
IRA permits the Secretary of the HHS to implement many of these provisions through guidance, as opposed to regulation, for 
the initial years. 
Specifically, with respect to price negotiations, Congress authorized Medicare to negotiate lower prices for certain costly 
single-source drug products that do not have competing generics or biosimilars and are reimbursed under Medicare Part B and 
Part D.  CMS may negotiate prices for ten high-cost drugs paid for by Medicare Part D starting in 2026, followed by 15 Part D 
drugs in 2027, 15 Part B or Part D drugs in 2028, and 20 Part B or Part D drugs in 2029 and beyond. This provision applies to 
drug products that have been approved for at least 9 years. Further, the legislation subjects drug manufacturers to civil monetary 
penalties and a potential excise tax for failing to comply with the legislation by offering a price that is not equal to or less than 
the negotiated “maximum fair price” under the law or for taking price increases that exceed inflation). In addition, the IRA 
established inflation rebate programs under Medicare Part B and Part D. These programs require manufacturers to pay rebates 
to Medicare if they raise their prices for certain Part B and Part D drugs faster than the rate of inflation. On December 9, 2024, 
with issuance of its 2025 Physician Fee Schedule final regulation, CMS finalized its rules governing the IRA inflation rebate 
programs.  The new law also caps Medicare out-of-pocket drug costs at an estimated $4,000 a year in 2024 and, thereafter 
beginning in 2025, at $2,000 a year.
The IRA includes a provision, known as the orphan drug exclusion, that excludes from price negotiations those orphan 
drugs that have been designated for only one rare disease or condition and for which the only approved indication (or 
indications) is for such disease or condition. Thus, as CMS stated in final guidance in July 2023, a drug or biologic that is 
designated for more than one rare disease or condition will not qualify for the orphan drug exclusion, even if it is not approved 
for any indications for the additional diseases or conditions. Further, CMS will only consider active designations/approvals 
when evaluating a drug or biologic for the orphan drug exclusion. CMS has also clarified that, if a drug loses its orphan drug 
status, the agency will use the earliest date of approval/licensure to determine whether the product is a qualifying single source 
drug subject to price negotiations.
The first cycle of negotiations for the Medicare Drug Price Negotiation Program commenced in the summer of 2023. On 
August 15, 2024, the HHS published the results of the first Medicare drug price negotiations for ten selected drugs that treat a 
range of conditions, including diabetes, chronic kidney disease, and rheumatoid arthritis. The prices of these ten drugs will 
become effective January 1, 2026. On January 17, 2025, shortly before the new administration took office, CMS announced its 
selection of 15 additional drugs covered by Part D for the second cycle of negotiations. There has been uncertainty about the 
extent to which the new administration would support the price negotiation program. Following the change in administrations, 
CMS issued a public statement on January 29, 2025, declaring that lowering the cost of prescription drugs is a top priority of 
the new administration and CMS is committed to considering opportunities to bring greater transparency in the negotiation 
program. The second cycle of negotiations with participating drug companies will occur during 2025, and any negotiated prices 
for this second set of drugs will be effective starting January 1, 2027.
On June 6, 2023, Merck filed a lawsuit against HHS and CMS asserting that, among other things, the IRA’s Drug Price 
Negotiation Program for Medicare constitutes an uncompensated taking in violation of the Fifth Amendment of the 
Constitution. Subsequently, a number of other parties, including the U.S. Chamber of Commerce, Bristol Myers Squibb 
Company, the Pharmaceutical Research and Manufacturers of America, Astellas, Novo Nordisk, Janssen Pharmaceuticals, 
Novartis, AstraZeneca and Boehringer Ingelheim, also filed lawsuits in various courts with similar constitutional claims against 
HHS and CMS. HHS has generally won the substantive disputes in these cases, and various federal district court judges have 
expressed skepticism regarding the merits of the legal arguments being pursued by the pharmaceutical industry. Certain of these 
cases are now on appeal and, on October 30, 2024, the Court of Appeals for the Third Circuit heard oral argument in three of 
these cases. Litigation involving these and other provisions of the IRA will continue with unpredictable and uncertain results.
At the state level, legislatures are increasingly passing legislation and implementing regulations designed to control 
pharmaceutical pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access 
and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other 
countries and bulk purchasing. In addition, regional health care authorities and individual hospitals are increasingly using 
bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug 
and other health care programs. These measures could reduce the ultimate demand for our products, once approved, or put 
pressure on our product pricing. We expect that additional state and federal healthcare reform measures will be adopted in the 
future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, 
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which could result in reduced demand for our drug candidates or additional pricing pressures. This may be increasingly true 
with respect to products approved pursuant to the accelerated approval pathway. State Medicaid programs and other payers are 
developing strategies and implementing significant coverage barriers, or refusing to cover these products outright, arguing that 
accelerated approval drugs have insufficient or limited evidence despite meeting the FDA’s standards for accelerated approval.
In the European Union, pricing and reimbursement schemes vary widely from country to country. Some countries provide 
that products may be marketed only after a reimbursement price has been agreed. Some countries may require the completion of 
additional studies that compare the cost-effectiveness of a particular drug candidate to currently available therapies or so-called 
health technology assessments, in order to obtain reimbursement or pricing approval. For example, the European Union 
provides options for its member states to restrict the range of products for which their national health insurance systems provide 
reimbursement and to control the prices of medicinal products for human use. European Union member states may approve a 
specific price for a product or it may instead adopt a system of direct or indirect controls on the profitability of the company 
placing the product on the market. Other member states allow companies to fix their own prices for products, but monitor and 
control prescription volumes and issue guidance to physicians to limit prescriptions. Recently, many countries in the European 
Union have increased the amount of discounts required on pharmaceuticals and these efforts could continue as countries attempt 
to manage healthcare expenditures, especially in light of the severe fiscal and debt crises experienced by many countries in the 
European Union. The downward pressure on health care costs in general, particularly prescription drugs, has become intense. 
As a result, increasingly high barriers are being established to the entry of new products. Political, economic and regulatory 
developments may further complicate pricing negotiations, and pricing negotiations may continue after reimbursement has been 
obtained. Reference pricing used by various European Union member states, and parallel trade, i.e., arbitrage between low-
priced and high-priced member states, can further reduce prices. There can be no assurance that any country that has price 
controls or reimbursement limitations for pharmaceutical products will allow favorable reimbursement and pricing 
arrangements for any products, if approved in those countries.
Federal and State Data Privacy Laws
There are multiple privacy and data security laws that may impact our business activities, in the United States and in other 
countries where we conduct trials or where we may do business in the future. These laws are evolving and may increase both 
our obligations and our regulatory risks in the future. For example, in the health care industry generally, under HIPAA, HHS 
has issued regulations to protect the privacy and security of protected health information, or PHI, used or disclosed by covered 
entities including certain healthcare providers, health plans and healthcare clearinghouses. HIPAA also imposes certain 
obligations on the business associates of covered entities that obtain protected health information in providing services to or on 
behalf of covered entities. HIPAA may apply to us in certain circumstances and may also apply to our business partners in ways 
that may impact our relationships with them. In addition, our clinical trials are regulated by the Common Rule, which also 
includes specific privacy-related provisions. In addition to federal privacy regulations, there are a number of state laws 
governing confidentiality and security of health information that may be applicable to our business. In addition to possible 
federal civil and criminal penalties for HIPAA violations, state attorneys general are authorized in some circumstances to file 
civil actions for damages or injunctions in federal courts to enforce HIPAA and seek attorney’s fees and costs associated with 
pursuing federal civil actions. State attorneys general also have authority to enforce state privacy and security laws. New laws 
and regulations governing privacy and security may be adopted in the future as well.
In addition to potential enforcement by HHS, we are also potentially subject to privacy enforcement from the Federal 
Trade Commission, or FTC. The FTC has been particularly focused on the unpermitted processing of health and genetic data 
through its recent enforcement actions and is expanding the types of privacy violations that it interprets to be "unfair" under 
Section 5 of the FTC Act, as well as the types of activities it views to trigger the Health Breach Notification Rule (which the 
FTC also has the authority to enforce). The agency is also in the process of developing rules related to commercial surveillance 
and data security that may impact our business. We will need to account for the FTC's evolving rules and guidance for proper 
privacy and data security practices in order to mitigate our risk for a potential enforcement action, which may be costly. If we 
are subject to a potential FTC enforcement action, we may be subject to a settlement order that requires us to adhere to very 
specific privacy and data security practices, which may impact our business. We may also be required to pay fines as part of a 
settlement (depending on the nature of the alleged violations). If we violate any consent order that we reach with the FTC, we 
may be subject to additional fines and compliance requirements. Finally, both the FTC and HHS’s enforcement priorities (as 
well as those of other federal regulators) may be impacted by the change in administration and new leadership.
There are also increased restrictions at the federal level relating to transferring sensitive data outside of the United States 
to certain foreign countries. For example, in 2024, Congress passed H.B. 815, which included the Protecting Americans’ Data 
from Foreign Adversaries Act of 2024. This law creates certain restrictions for entities that disclose sensitive data (including 
potential health data) to countries such as China. Failure to comply with these rules can lead to a potential FTC enforcement 
action. Additionally, the Department of Justice recently finalized a rule implementing Executive Order 14117, which creates 
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similar restrictions related to the transfer of sensitive US data to countries such as China. These data transfer restrictions (and 
others that may pass in the future) may create operational challenges and legal risks for our business.
States also are passing privacy laws that may impact our business operations. In 2018 California passed into law the 
California Consumer Privacy Act, or the CCPA, which took effect on January 1, 2020, and imposed many requirements on 
businesses that process the personal information of California residents. Many of the CCPA’s requirements are similar to those 
found in the GDPR, including requiring businesses to provide notice to data subjects regarding the information collected about 
them and how such information is used and shared, and providing data subjects the right to request access to such personal 
information and, in certain cases, request the erasure of such personal information. The CCPA also affords California residents 
the right to opt-out of “sales” of their personal information. The CCPA contains significant penalties for companies that violate 
its requirements. In November 2020 California voters passed a ballot initiative for the California Privacy Rights Act, or the 
CPRA, which went into effect on January 1, 2023, and significantly expanded the CCPA to incorporate additional GDPR-like 
provisions including requiring that the use, retention, and sharing of personal information of California residents be reasonably 
necessary and proportionate to the purposes of collection or processing, granting additional protections for sensitive personal 
information, and requiring greater disclosures related to notice to residents regarding retention of information. The CPRA also 
created a new enforcement agency – the California Privacy Protection Agency – whose sole responsibility is to enforce the 
CPRA, which will further increase compliance risk. The provisions in the CPRA may apply to some of our business activities. 
In addition to California, a number of other states have passed comprehensive privacy laws similar to the CCPA and 
CPRA. These laws are either in effect or will go into effect sometime over the next several years. Like the CCPA and CPRA, 
these laws create obligations related to the processing of personal information, as well as special obligations for the processing 
of “sensitive” data, which includes health data in some cases. Some of the provisions of these laws may apply to our business 
activities. There are also states that are strongly considering or have already passed comprehensive privacy laws that will go 
into effect over the next several years. Other states will be considering similar laws in the future, and Congress has also been 
debating passing a federal privacy law. There are also states that are specifically regulating health information that may affect 
our business. For example, the State of Washington passed the My Health My Data Act in 2023 which specifically regulated 
health information that is not otherwise regulated by the HIPAA rules, and the law also has a private right of action, which 
further increases the relevant compliance risk. Connecticut and Nevada have also passed similar laws regulating consumer 
health data, and more states are considering such legislation. These laws may impact our business activities, including our 
identification of research subjects, relationships with business partners and ultimately the marketing and distribution of our 
products.
Plaintiffs' lawyers are also increasingly using privacy-related statutes at both the state and federal level to bring lawsuits 
against companies for their data-related practices. In particular, there have been a significant number of cases filed against 
companies for their use of pixels and other web trackers. These cases often allege violations of the California Invasion of 
Privacy Act and other state laws regulating wiretapping, as well as the federal Video Privacy Protection Act. 
Competition
Emavusertib, if approved, and our outlicensed program, Erivedge, will compete with existing and new products being 
developed by others for treatment of the same indications. Competition in the development of human therapeutics and, in 
particular, human therapeutics that target signaling pathways to treat cancers, is intense and rapidly evolving. Our competitors 
include large pharmaceutical and biopharmaceutical companies, as well as specialized biotechnology firms, that are developing 
cancer therapies in the same indications as we are. Many competitors have substantially greater research, development, 
manufacturing, marketing, and financial capabilities, than we do. Successful development and commercialization of products 
depends on the ability to differentiate the benefits of our products (e.g. efficacy, safety, dosing, route of administration, 
convenience, and cost-effectiveness) over competing drug therapies. There are several companies developing drug candidates 
that target the same molecular targets and signaling pathways, and in some cases the same cancer indications, which are being 
pursued by us. 
Emavusertib. 
We believe our primary competitors for emavusertib are those companies pursuing oncology indications in IRAK4, R/R 
AML or hrMDS with a FLT3 mutation, R/R PCNSL, and frontline AML combinations with azacitidine and venetoclax. 
Companies pursuing IRAK 4 inhibitors include a pre-clinical stage company, Kurome Therapeutics (IRAK1/4) and a 
clinical stage company, Rigel Pharmaceuticals, Inc. (R289). 
Astellas Pharma, Inc. (gilteritinib) has an approved FLT3 inhibitor. Other companies developing FLT3 inhibitors include: 
Aptose Biosciences, Inc. (tuspetinib), HEC Pharma Co., Ltd. (HEC73543), Ellipses Pharma (EP0042), CSPC Pharmaceuticals 
Group Limited (SKLB1028), and Eilean Therapeutics (lomonitinib).
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Abbvie, Inc. has an approved BTK inhibitor, ibrutinib, which is being used pursuant to the National Comprehensive 
Cancer Network guidelines as a treatment for PCNSL. Other companies pursuing R/R PCNSL are Bayer AG (copanlisib in 
combination with ibrutinib), Gilead Sciences, Inc. (axicabtagene ciloleucel), Ono Pharmaceuticals Co., Ltd. (tirabrutinib), and 
BeiGene, Ltd. (zanubrutinib in combination with rituximab and methotrexate). Additionally, there are several marketed 
products that are being studied in combination as potential treatments for PCNSL (ibrutinib, rituximab and lenalidomide). 
Companies pursuing frontline AML in combination with either azacitidine and venetoclax, or both, include: Faron 
Pharmaceuticals Oy (bexmarilimab), Novartis AG (sabatolimab), OncoVerity, Inc. (cusatuzumab), Glycomimetics, Inc. 
(uproleselan), Shattuck Labs, Inc. (SL-17254), Bio-Path Holdings, Inc. (prexigebersen), Astellas Pharma, Inc. (gilteritinib), and 
ImmunoGen, Inc. (pivekimab sunirine). 
Erivedge.
In 2015, Sun Pharmaceuticals Industries Ltd.'s sonidegib (Odomzo®), a Hedgehog signaling pathway inhibitor indicated 
for the treatment of adult patients with locally advanced BCC that has recurred following surgery or radiation, or those who are 
not candidates for surgery or radiation, received regulatory approvals in the United States and European Union. Other 
commercially available Hedgehog pathway inhibitors include Pfizer Inc.'s glasdegib (Daurismo™). We are aware of several 
other biotechnology and pharmaceutical companies that have drug development programs relating to compounds that modulate 
the Hedgehog signaling pathway, including: PellePharm Inc. (patidegib), and Senhwa Biosciences Inc. (silmitasertib / 
CX-4945). 
Many competing companies have financial, marketing and human resource capacities that are substantially greater than 
our own, which may provide these competitors with significant advantages over us. Others have extensive experience in 
undertaking clinical trials, in obtaining regulatory approval to market products, in manufacturing products on a large scale and 
in effectively promoting products to healthcare providers, health plans and consumers which may enhance their competitive 
position relative to ours. In addition to competing with pharmaceutical and biotechnology companies, the products that we are 
developing would also compete with those being developed by academic and research institutions, government agencies and 
other public organizations. Any of these organizations may discover new therapies, seek patent protection or establish 
collaborative arrangements for products and technologies that compete with our products and technologies.
The technologies underlying the development of human therapeutic products are expected to continue to undergo rapid 
and significant advancement and unpredictable changes. Accordingly, our technological and commercial success will be based, 
among other things, on our ability to develop proprietary positions in key scientific areas and efficiently evaluate potential 
product opportunities.
The timing of a product’s introduction may be a major factor in determining eventual commercial success and 
profitability. Early entry may have important advantages in gaining product acceptance and market share. Accordingly, we 
believe the relative speed with which we or any current or future collaborator(s) can complete preclinical and clinical testing, 
obtain regulatory approvals, and supply commercial quantities of a product will have an important impact on our competitive 
position, both in the U.S. and abroad. Other companies may succeed in developing similar products that are introduced earlier, 
are more effective, or are produced and marketed more effectively, or at a minimum obtain a portion of the market share. For 
example, our competitors may discover, characterize and develop important targeted cancer molecules before we do, which 
could have a material adverse effect on any of our related research programs. If research and development by others renders any 
of our products obsolete or noncompetitive, then our potential for success and profitability may be adversely affected.
We rely on, or intend to rely on, strategic collaborators for support in our research programs and for preclinical evaluation 
and clinical development of our potential products and manufacturing and marketing of any products. Our strategic 
collaborators may conduct multiple product development efforts within each disease area that is the subject of our strategic 
collaboration with them. Our strategic collaboration agreements may not restrict the strategic collaborator from pursuing 
competing internal development efforts. Any of our drug candidates, therefore, may be subject to competition with a drug 
candidate under development by a strategic collaborator.
Manufacturing and Supply
We do not have our own manufacturing capabilities. We currently rely on collaborators or subcontractors and third party 
manufacturers and suppliers, and we have no plans to develop our own manufacturing capability. Instead, we plan to continue 
to rely on corporate collaborators or subcontractors and third party manufacturers and suppliers to manufacture products. If any 
of our current or planned suppliers encounter regulatory compliance problems or enforcement actions for their own or a 
collaborative product, it could have a material adverse effect on our business prospects.
We employ a material sourcing strategy that complies with regulatory requirements for building increasing amounts of 
quality into the product, beginning with raw materials and following through to packaged drug product for clinical use. Starting 
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materials for the drug substance are typically sourced from qualified suppliers, and their production is conducted under our 
supervision. Where appropriate, redundant suppliers are added to ensure availability of key materials.
Drug substance and drug product production, and subsequent packaging, labeling and distribution are conducted in the 
various locations under GMP controls.
Sales and Marketing
We have no sales, marketing or distribution experience or infrastructure. We must build infrastructure related to product 
sales, marketing and distribution or make arrangements with third parties to perform these services.
Human Capital Resources
As of December 31, 2024, we had 34 employees, of which 33 are full-time. Of our employees, 22 are currently involved 
in research and development, including medical doctors, biologists, and other clinical or scientific disciplines who seek to 
identify and develop new applications for our existing proprietary portfolio. None of our employees is a party to a collective 
bargaining agreement, and we consider our relations with our employees to be good. 
We believe that our future success largely depends upon our continued ability to attract and retain highly skilled 
employees. We offer our employees a comprehensive compensation package. Our well-designed compensation and benefits 
package includes salaries, annual bonuses, equity compensation, 401(k) match, life insurance, premium health and workers’ 
compensation insurance, paid vacation, holidays and year-end shutdown. Our equity compensation plans, pursuant to which we 
may grant stock options, restricted stock, restricted stock units and other equity-based awards, are designed to align our 
employees’ interests with our stockholders’ interests and motivate effective performance, which drives company success. In 
addition, we provide certain wellness resources for our employees, such as work-life counseling and support through an 
employee assistance program. We have adopted a written code of business conduct and ethics that applies to our directors, 
officers and employees, including our principal executive officer, principal financial officer and principal accounting officer.
Segment Reporting
We are engaged solely in the discovery and development of innovative drug candidates for the treatment of human 
cancers. Accordingly, we have determined that we operate in one operating segment.
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Information about our Executive Officers
Our executive officers as of March 31, 2025 are as follows:
Name
Age
Position
James E. Dentzer
58
President and Chief Executive Officer 
Jonathan Zung, Ph.D.
60
Chief Development Officer
Diantha Duvall
53
Chief Financial Officer
James E. Dentzer
Mr. Dentzer has served on our board and as our President and Chief Executive Officer since 
September 2018. From March 2018 to September 2018, Mr. Dentzer served as our Chief 
Operating Officer and Chief Financial Officer. From March 2016 to March 2018, Mr. 
Dentzer served as our Chief Administrative Officer and Chief Financial Officer. Mr. Dentzer 
has also held the positions of secretary and treasurer from March 2016 to March 2019. 
Previously, Mr. Dentzer served as Chief Financial Officer of Dicerna Pharmaceuticals, Inc., 
a biotechnology company, from December 2013 to December 2015. Prior to that, he was the 
Chief Financial Officer of Valeritas, Inc., a medical technology company, from March 2010 
to December 2013. Prior to joining Valeritas, Inc., he was the Chief Financial Officer of 
Amicus Therapeutics, Inc., a biotechnology company, from October 2006 to October 2009. 
In prior positions, he spent six years as Corporate Controller of Biogen Inc., a biotechnology 
company, and six years in various senior financial roles at E.I. du Pont de Nemours and 
Company, a chemical, petroleum and biotechnology company, in the U.S. and Asia. Mr. 
Dentzer also serves as a director of Imunon, Inc., a clinical stage drug development 
company. Mr. Dentzer holds a B.A. in philosophy from Boston College and an M.B.A. from 
the University of Chicago. 
Jonathan Zung, Ph.D.
Dr. Zung has served as our Chief Development Officer since May 2023. From January 2021 
to March 2023, Dr. Zung served as Chief Development Officer of Evelo Biosciences, Inc., a 
clinical stage biotechnology company. From May 2020 to December 2020, Dr. Zung served 
as President of Sponsor and CRO programs of WCG Clinical, a clinical services provider, 
and from June 2018 to May 2020, he served as President of Site Division. From April 2016 
to April 2018, Dr. Zung was Group President of Clinical Development and 
Commercialization Services Organization at Covance, Inc., a contract research organization. 
Prior to Covance, Inc., Dr. Zung held leadership roles at UCB Biosciences, Bristol Myers 
Squibb, and Pfizer. Dr. Zung holds a B.S. in chemistry from Florida Institute of Technology 
and a Ph.D. in analytical chemistry from Emory University.
Diantha Duvall
Ms. Duvall has served as our Chief Financial Officer since August 2022. From March 2019 
to June 2022, Ms. Duvall served as Chief Financial Officer of Genocea Biosciences, Inc., a 
biotechnology company focused on the development of cancer immunotherapies. From 
February 2017 to January 2019, Ms. Duvall served as Vice President, Finance and Chief 
Accounting Officer at Bioverativ, Inc., a biopharmaceutical company focused on therapies 
for hemophilia and other rare blood disorders. Prior to joining Bioverativ, Inc., Ms. Duvall 
was Global Commercial Controller and U.S. Commercial Controller at Biogen in 2016 and 
2015, respectively. Prior to Biogen, Ms. Duvall held positions of increasing responsibility at 
Merck and Co., Inc., a pharmaceutical company, from 2009 to 2015 and 
PricewaterhouseCoopers LLP, an accounting firm, from 1996 through 2009. Ms. Duvall 
holds a B.A. in economics and public policy from Colby College and an M.S. in accounting 
and M.B.A. from Northeastern University.
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ITEM  1A.
RISK FACTORS
You should carefully consider the risks described below in addition to the other information set forth in this Annual 
Report on Form 10-K, including the Management’s Discussion and Analysis of Financial Condition and Results of Operations 
section and the Consolidated Financial Statements and related notes. These risks, some of which have occurred and any of 
which may occur in the future, can have a material adverse effect on our business, financial condition, results of operations or 
the price of our publicly traded securities. The risks described below are not the only risks we face. Additional risks and 
uncertainties not currently known to us, or that we currently deem to be immaterial, may occur or become material in the future 
and adversely affect our business, reputation, financial condition, results of operations or the price of our publicly traded 
securities. Therefore, historical operating results, financial and business performance, events and trends are often not a reliable 
indicator of future operating results, financial and business performance, events or trends. If any of the following risks occurs, 
our business, financial condition, and results of operations and future growth prospects could be materially and adversely 
affected. 
RISKS RELATING TO OUR FINANCIAL RESULTS AND NEED FOR FINANCING
We have identified conditions and events that raise substantial doubt about our ability to continue as a going concern.
We will require substantial funds to maintain our research and development program and support operations in the near 
term. We have incurred losses and negative cash flows from operations since our inception. As of December 31, 2024, we had 
$20.0 million in cash and cash equivalents. In March 2025, we completed a registered direct offering and concurrent private 
placement for net proceeds of approximately $9.0 million. We expect these available cash resources, together with the proceeds 
from the March 2025 offering, to fund our existing operations into the fourth quarter of 2025. We have based this assessment 
on assumptions that may prove to be wrong, and we could exhaust our available capital resources sooner than we expect. Based 
on our current cash and cash equivalents, recurring losses and cash outflows from operations since inception, an expectation of 
continuing losses and cash outflows from operations for the foreseeable future and the need to raise additional capital to finance 
our future operations, we have concluded that we do not have sufficient cash on hand to support current operations beyond the 
next 12 months from the date of filing this Annual Report on Form 10-K.
We will require substantial additional funding in the immediate term to fund the development of emavusertib through 
regulatory approval and commercialization, and to support our continued operations. We will need to seek additional funding 
through a number of potential avenues, including private or public equity financings, collaborations, or other strategic 
transactions. We have faced and expect to continue to face substantial difficulty in raising capital. If sufficient funds are not 
available, we will have to delay, reduce the scope of, or eliminate our research and development program for emavusertib, 
including related clinical trials and operating expenses, potentially delaying the time to market for or preventing the marketing 
of emavusertib, which would adversely affect our business prospects and our ability to continue our operations, and would have 
a negative impact on our financial condition and ability to pursue our business strategies. In addition, we may seek to engage in 
one or more strategic alternatives, such as a strategic partnership with one or more parties, the licensing, sale or divestiture of 
some of our assets or proprietary technologies or the sale of our company, but there can be no assurance that we would be able 
to enter into such a transaction or transactions on a timely basis or on terms favorable to us, or at all. If we are unable to obtain 
sufficient capital, we would be unable to fund our operations and may be required to evaluate alternatives, which could include 
dissolving and liquidating our assets or seeking protection under the bankruptcy laws, and a determination to file for bankruptcy 
could occur at a time that is earlier than when we would otherwise exhaust our cash resources. If we decide to dissolve and 
liquidate our assets or to seek protection under the bankruptcy laws, it is unclear to what extent we would be able to pay our 
obligations, and, accordingly, it is further unclear whether and to what extent any resources would be available for distributions 
to stockholders.
If we are unable to continue as a going concern, we may have to liquidate our assets and may receive less than the value 
at which those assets are carried on our audited financial statements, and it is likely that investors will lose all or a part of their 
investment. The report from our independent registered public accounting firm issued in connection with this Annual Report on 
Form 10-K contains, and future reports may contain, statements expressing substantial doubt about our ability to continue as a 
going concern. If we seek additional financing to fund our business activities in the future and there remains substantial doubt 
about our ability to continue as a going concern, investors or other financing sources may be unwilling to provide funding to us 
on commercially reasonable terms, if at all.
We have incurred substantial losses, expect to continue to incur substantial losses for the foreseeable future and may 
never generate significant revenue or achieve or maintain profitability.
We have incurred significant annual net operating losses in every year since our inception. We expect to continue to incur 
significant and increasing net operating losses for at least the next several years. Our net loss was $43.4 million for the year 
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ended December 31, 2024. As of December 31, 2024, we had an accumulated deficit of $1.2 billion. As noted above, we have 
identified conditions and events that raise substantial doubt about our ability to continue as a going concern. We have not 
completed the development of any drug candidate on our own. Other than Erivedge®, which is being commercialized and 
further developed by Genentech and Roche under our collaboration agreement with Genentech, we may never have a drug 
candidate approved for commercialization. Since our inception, we have funded our operations primarily through private and 
public placements of our equity securities, license fees, contingent cash payments, research and development funding from our 
corporate collaborators and the monetization of certain royalty rights. We have devoted substantially all of our financial 
resources and efforts to research and development and general and administrative expense to support such research and 
development. Our net losses may fluctuate significantly from quarter to quarter and year to year. Net losses and negative cash 
flows have had, and will continue to have, an adverse effect on our stockholders’ equity and working capital. 
We anticipate that our expenses will increase substantially if and as we:
•
continue to develop and conduct clinical trials for emavusertib;
•
seek regulatory and marketing approvals for emavusertib, if it successfully completes clinical trials;
•
maintain, expand, and protect our intellectual property portfolio; 
•
hire and retain additional personnel;
•
require the manufacture of larger quantities of emavusertib for clinical development and, potentially, 
commercialization;
•
establish sales, marketing, distribution and other commercial infrastructure in the future to commercialize various 
drugs for which we may obtain marketing approval, if any;
•
add equipment and physical infrastructure as may be required to support our research and development program;
•
seek to identify and develop additional drug candidates; and
•
acquire or in-license other drug candidates or technologies.
Our ability to become and remain profitable depends on our ability to generate significant revenue. Our only current 
source of revenues comprises licensing and royalty revenues that we earn under our collaboration with Genentech related to the 
development and commercialization of Erivedge. A significant portion of our royalty and royalty related revenues under our 
collaboration with Genentech will be paid to TPC Investments I LP and TPC Investments II LP, or the Purchasers, pursuant to 
the royalty interest purchase agreement we and Curis Royalty entered into with the Purchasers and Lind SA LLC, or Agent, on 
March 22, 2019, or the Oberland Purchase Agreement. 
We do not expect to generate significant revenues other than those related to Erivedge unless and until we are, or any 
collaborator is, able to obtain marketing approval for, and successfully commercialize emauvsertib. Successful 
commercialization will require achievement of key milestones, including initiating and successfully completing clinical trials of 
emavusertib, obtaining marketing approval for emavusertib, manufacturing, marketing, and selling those drugs for which we, or 
any of our collaborators, may obtain marketing approval, satisfying any post marketing requirements and obtaining 
reimbursement for our drugs from private insurance or government payors. Because of the uncertainties and risks associated 
with these activities, we are unable to accurately predict the timing and amount of revenues and whether or when we might 
achieve profitability. We and any collaborators may never succeed in these activities and, even if we do, or any collaborators 
do, we may never generate revenues that are large enough for us to achieve profitability. Even if we do achieve profitability, we 
may not be able to sustain or increase profitability. Our failure to become and remain profitable would decrease the value of our 
company and could impair our ability to raise capital, expand our business, maintain our research and development efforts, 
diversify our pipeline of drug candidates, or continue our operations and cause a decline in the value of our common stock.
We will require substantial additional capital, which may be difficult to obtain, and if we are unable to raise capital 
when needed, we could be forced to delay, reduce or eliminate our drug development program or commercialization 
efforts, and our ability to continue operations could be adversely affected.
We will require substantial funds to continue our research and development program for emavusertib and to fulfill our 
planned operating goals. Our planned operating and capital requirements currently include the support of our current and future 
research and development activities for emavusertib, as well as other candidates we have, and may continue to license under our 
collaboration with Aurigene. We will require substantial additional capital to fund the further development of emavusertib, as 
well as to fund our general and administrative costs and expenses. Moreover, our agreements with collaborators impose 
significant potential financial obligations on us. For example, under our collaboration, license and option agreement with 
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Aurigene, we are required to make milestone and royalty fee payments, which impose significant potential financial obligations 
on us. 
In March 2025, we completed a registered direct offering and concurrent private placement for net proceeds of 
approximately $9.0 million. Based upon our current operating plan, we believe that our existing cash and cash equivalents of 
$20.0 million as of December 31, 2024, together with the proceeds from the March 2025 offering, should enable us to fund our 
existing operations into the fourth quarter of 2025. We have based this assessment on assumptions that may prove to be wrong, 
and it is possible that we will not achieve the progress that we expect with these funds because the actual costs and timing of 
clinical development and regulatory and commercial activities are difficult to predict and are subject to substantial risks and 
delays, and that we will use our capital resources sooner than we currently expect. This estimate does not reflect any additional 
expenditures that may result from any further strategic transactions to expand and diversify our product pipeline, including 
acquisitions of assets, businesses, rights to products, drug candidates or technologies or strategic alliances or collaborations that 
we may pursue. 
Our ability to raise additional funds in the future will depend on financial, economic and market conditions, many of 
which are outside of our control, and we may be unable to raise financing when needed, or on terms favorable to us, or at all. 
Furthermore, high volatility and instability in the capital markets, interest rate fluctuations, heightened inflation, and economic 
uncertainty have resulted in a significant disruption of the biotechnology financial markets and have had, and could continue to 
have, a negative impact on the price of our common stock and ability to raise capital. If the disruption persists and deepens, we 
could continue to experience an inability to raise additional funds, and our cost of financing or restrictions on our access to 
potential sources of liquidity could persist. If we are unable to obtain sufficient funding, we may be forced to delay, reduce in 
scope or eliminate our research and development program for emavusertib, including related clinical trials and operating 
expenses, potentially delaying the time to market for, or preventing the marketing of, emavusertib. In addition, we may seek to 
engage in one or more strategic alternatives, such as a strategic partnership with one or more parties, the licensing, sale or 
divestiture of some of our assets or proprietary technologies or the sale of our company, but there can be no assurance that we 
would be able to enter into such a transaction or transactions on a timely basis or on terms favorable to us, or at all. 
Our failure to raise capital through a financing or strategic alternative as and when needed could adversely affect our 
business prospects and our ability to continue operations, and would have a negative impact on our financial condition and our 
ability to pursue our business strategy. If we are unable to raise sufficient capital we would be unable to fund our operations and 
may be required to evaluate alternatives, which could include dissolving and liquidating our assets or seeking protection under 
the bankruptcy laws, and a determination to file for bankruptcy could occur at a time that is earlier than when we would 
otherwise exhaust our cash resources.
In February 2024, we entered into an amended and restated sales agreement, or the 2024 Sales Agreement, with Cantor 
Fitzgerald & Co., or Cantor, and JonesTrading Institutional Services LLC, or JonesTrading, to sell from time to time up to 
$100.0 million shares of our common stock through an “at-the-market offering” program under which Cantor and JonesTrading 
act as sales agents. The extent to which we utilize the 2024 Sales Agreement with Cantor and JonesTrading as a source of 
funding will depend on a number of factors, including the prevailing market price of our common stock, general market 
conditions and other restrictions and the extent to which we are able to secure funds from other sources. Accordingly, we may 
not be able to sell additional shares under the 2024 Sales Agreement at prices or amounts that we deem acceptable, and there 
can be no assurance that we will be able to sell any additional shares of common stock contemplated under the 2024 Sales 
Agreement. We sold 188,316 shares of common stock under the 2024 Sales Agreement representing gross proceeds of $1.2 
million during the twelve months ended December 31, 2024.
Furthermore, there are a number of factors that may affect our future capital requirements and further accelerate our need 
for additional working capital, many of which are outside our control, including the following:
•
unanticipated costs in our research and development program;
•
the timing and cost of obtaining regulatory approvals for emavusertib and maintaining compliance with regulatory 
requirements;
•
payments due to licensors, including Aurigene, for patent rights and technology used in our drug development 
programs;
•
the costs of commercialization activities for emavusertib if it receives marketing approval, to the extent such costs are 
our responsibility, including the costs and timing of establishing drug sales, marketing, distribution and 
manufacturing capabilities;
•
unplanned costs to prepare, file, prosecute, defend, and enforce patent claims and other patent-related costs, including 
litigation costs and technology license fees; and
•
our ability to continue as a going concern.
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In connection with the Oberland Purchase Agreement, we transferred and encumbered certain royalty and royalty 
related payments on commercial sales of Erivedge; Curis Royalty granted a first priority lien and security interest in all 
of its assets, including its rights to the Erivedge royalty payments; and we granted the Purchasers a first priority lien 
and security interest in our equity interest in Curis Royalty. As a result, in the event of a default by us or Curis Royalty, 
Curis Royalty could lose all retained rights to certain future royalty and royalty related payments, Curis Royalty could 
be required to repurchase the Purchased Receivables at a price that is a multiple of the payments we have received, and 
our ability to enter into future arrangements may be inhibited, all of which could have a material adverse effect on our 
business, financial condition and stock price, including our ability to continue as a going concern.
Pursuant to the Oberland Purchase Agreement, the Purchasers acquired the rights to a portion of certain royalty and 
royalty related payments excluding a portion of non-U.S. royalties retained by Curis Royalty, referred to as the Purchased 
Receivables, owed by Genentech under our collaboration agreement with Genentech. In connection with entering into the 
Oberland Purchase Agreement, Curis Royalty and the Agent entered into a security agreement and Curis and the Purchasers 
entered into a pledge agreement.
Following an event of default under the security agreement entered into between Curis Royalty and the Agent, the Agent 
has the right to stop all allocations of payments that would have otherwise been allocated to Curis Royalty pursuant to the 
Oberland Purchase Agreement and instead retain all such payments. In addition, the Oberland Purchase Agreement provides 
that after the occurrence of an event of default by Curis Royalty under the security agreement, as described below, the 
Purchasers shall have the option, for a period of 180 days, to require Curis Royalty to repurchase the Purchased Receivables at 
a price, referred to as the Put/Call Price, equal to 250% of the sum of the upfront purchase price and any portion of the 
milestone payments paid in a lump sum by the Purchasers, if any, minus certain payments previously received by the 
Purchasers with respect to the Purchased Receivables.
Pursuant to the security agreement, Curis Royalty granted to the Agent a first priority lien and security interest in all of its 
assets and all real, intangible and personal property, including all of its right, title and interest in and to the Erivedge royalty 
payments. The security interest secures the obligations of Curis Royalty arising under the Oberland Purchase Agreement, the 
security agreement or otherwise with respect to the due and prompt payment of (i) an amount equal to the Put/Call Price and (ii) 
all fees, costs, expenses, indemnities and other payments of Curis Royalty under or in respect of the Oberland Purchase 
Agreement and the security agreement.
The obligations of Curis Royalty under the Oberland Purchase Agreement may be accelerated upon the occurrence of an 
event of default under the security agreement (subject to certain cure periods), which events of default include:
•
any royalty and royalty related payments to be remitted into a certain Curis Royalty designated account controlled by 
the Agent pursuant to a control agreement, referred to as the royalty account, into which all royalty and royalty 
related payments must be paid by Curis or Curis Royalty are not so remitted in accordance with the Oberland 
Purchase Agreement;
•
any representation or warranty made by Curis or Curis Royalty in the Oberland Purchase Agreement or any other 
transaction document proves to be incorrect or misleading in any material respect when made;
•
a default by Curis or Curis Royalty in the performance of affirmative and negative covenants set forth in the Oberland 
Purchase Agreement or any other transaction document;
•
a default by Curis in the performance or observance of its indemnity obligations under the Oberland Purchase 
Agreement;
•
the failure by Genentech to pay material amounts owed under the Genentech collaboration agreement because of an 
actual breach or default by Curis under the Genentech collaboration agreement;
•
the failure of the security agreement to create a valid and perfected first priority security interest in any of the 
collateral;
•
a material breach or default by Curis under our agreement with Curis Royalty pursuant to which we transferred our 
rights to the royalty revenues under the Genentech collaboration agreement to Curis Royalty;
•
the voluntary or involuntary commencement of bankruptcy proceedings by either Curis or Curis Royalty and other 
insolvency related events;
•
any materially adverse effect on the binding nature of any of the Oberland Purchase Agreement, security agreement, 
pledge agreement or other transaction documents, the Genentech collaboration agreement or our agreement with 
Curis Royalty; 
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•
any person shall be designated as an independent director of Curis Royalty other than in accordance with Curis 
Royalty’s limited liability company operating agreement; or 
•
Curis shall at any time cease to own, of record and beneficially, 100% of the equity interests in Curis Royalty.
Upon the occurrence and continuance of an event of default under the security agreement, the Agent may exercise its 
rights and remedies under the security agreement with respect to Curis Royalty and to the collateral pledged thereunder, 
including, among other things, acceleration of the obligations under the security agreement, the sale or other realization of the 
collateral and performance of Curis Royalty’s obligations under the purchase and sale agreement that we entered into in 2012 
with Curis Royalty pursuant to which we transferred to Curis Royalty rights to certain royalty and royalty-related payments 
owed by Genentech to us under our collaboration agreement with Genentech. Additionally, Curis granted to the Agent a first 
priority lien and security interest of Curis’ equity interest in Curis Royalty pursuant to a pledge agreement. Upon the occurrence 
and continuance of an event of default under the security agreement, the Agent may exercise its rights and remedies under the 
pledge agreement with respect to the equity interests, including, among other things, the rights to receive distributions and 
exercise voting rights with respect to the equity interests and to sell or otherwise realize upon the collateral in satisfaction of the 
obligations. The exercise by the Agent of the foregoing rights shall be deemed to constitute an exercise by the Purchasers of 
their put option under the Oberland Purchase Agreement.
If any of the above events of default were to occur, Curis Royalty may not have sufficient funds to pay the Put/Call Price 
and the Agent could foreclose on the secured royalty and royalty related payment stream and/or our equity interests in Curis 
Royalty. In such an event, we could lose our right to royalty and royalty related payments not transferred to the Purchasers 
pursuant to the Oberland Purchase Agreement and we could lose our rights in Curis Royalty. In addition, in the event 
Genentech exercises its set-off rights against royalty payments to Curis Royalty pursuant to our collaboration agreement with 
Genentech, Curis Royalty may be required to satisfy its royalty-sharing obligations to the Purchasers with amounts from its 
working capital. The Oberland Purchase Agreement also contains exculpation and indemnification obligations of Curis and 
Curis Royalty on behalf of the Agent and the Purchasers. Further, the encumbrance of all of Curis Royalty’s assets, including 
the right to royalties from sales of Erivedge, and our equity interests in Curis Royalty pursuant to the security agreement and 
pledge agreement, respectively, may inhibit us from raising additional funds or entering into other strategic arrangements. Any 
of these consequences of an event of default could have a material adverse effect on our business, financial condition and stock 
price, including our ability to continue as a going concern.
In March 2023, Curis and Curis Royalty received a letter from counsel to Oberland Capital Management, LLC, the 
Purchasers and the Agent alleging defaults under Sections 4.04 and 6.04(b) of the Oberland Purchase Agreement and 
demanding cure of the asserted default under Section 6.04(b) of the Oberland Purchase Agreement, which each such alleged 
default separately entitles the Purchasers to exercise the put option, which would require Curis Royalty to repurchase the 
Purchased Receivables at the Put/Call Price. Curis and Curis Royalty dispute these allegations. However, if Oberland elects to 
pursue these claims, and if Curis and Curis Royalty are unsuccessful in defending against these claims, it could have a material 
adverse impact on Curis and Curis Royalty, including their ability to continue as a going concern. We have not received any 
further communication on this topic from counsel to Oberland Capital Management, LLC, or the Purchasers and the Agent 
since the March 2023 letter. As of December 31, 2024, the estimated amount of the Put/Call Price is approximately $110.0 
million.
The amount of royalty revenue Curis Royalty receives from sales of Erivedge has been adversely affected by a 
competing drug, and may further be affected in the future.
Pursuant to the terms of our collaboration agreement with Genentech, our subsidiary Curis Royalty is entitled to receive 
royalties on net sales of Erivedge that range from 5% to 7.5% based upon global Erivedge sales by Roche and Genentech. The 
royalty rate applicable to Erivedge may be decreased in certain specified circumstances, including when a competing drug 
product that binds to the same molecular target as Erivedge is approved by the applicable country’s regulatory authority and is 
being sold in such country by a third party for use in the same indication as Erivedge, or when there is no issued intellectual 
property covering Erivedge in a territory in which sales are recorded. In 2015, the U.S. Food and Drug Administration, or FDA, 
and the European Medicines Agency's Committee for Medicinal Products for Human Use, or CHMP, approved an additional 
Hedgehog signaling pathway inhibitor marketed by Sun Pharmaceutical Industries Ltd., or Sun Pharmaceutical, sonidegib 
(Odomzo®), for the treatment of adults with locally advanced basal cell carcinoma, or BCC. Accordingly, Genentech reduced 
royalties on its net sales in the U.S. of Erivedge from 5-7.5% to 3-5.5%. Furthermore, Genentech has reduced by 2% royalties 
on net sales of Erivedge outside of the United States on a country-by-country basis to the extent that sonidegib is approved by 
the applicable country’s regulatory authority and is being sold in such country. We also believe that sales of sonidegib have, 
and are likely to continue to, adversely affect sales of Erivedge, including those in the U.S. and ex-U.S. countries, which would 
adversely affect the resulting revenue we may receive from Genentech. A decrease in sales of Erivedge, or in the royalty rate 
that we receive for sales of Erivedge, could adversely affect our operating results.
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If the estimates we make and the assumptions on which we rely in preparing our financial statements prove inaccurate, 
our actual results may vary significantly.
Our financial statements have been prepared in accordance with generally accepted accounting principles, or GAAP. The 
preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of our 
assets, liabilities, revenues and expenses, the amounts of charges taken by us, and disclosures related thereto. Such estimates 
and judgments include the value of certain liabilities. We base our estimates and judgments on historical experience and on 
various other assumptions that we believe to be reasonable under the circumstances. However, these estimates and judgments, 
and their underlying assumptions, may change over time. Accordingly, our actual financial results may vary significantly from 
the estimates contained in our financial statements.
RISKS RELATING TO THE DEVELOPMENT AND COMMERCIALIZATION OF OUR DRUG 
CANDIDATES
We depend heavily on the success of emavusertib. Emavusertib is still in early clinical development. Clinical trials of 
emavusertib may not be successful. If we are unable to commercialize emavusertib or experience significant delays in 
doing so, our business will be materially harmed.
 Our ability to generate drug revenues, which we do not expect will occur for many years, if ever, will depend heavily on 
the successful development and eventual commercialization of emavusertib. Our success depends heavily on our ongoing and 
future clinical trials of emavusertib, which are in early-stage clinical development.
We, and any collaborators, are not permitted to commercialize, market, promote or sell any drug candidate in the U.S. 
without obtaining marketing approval from the FDA. Foreign regulatory authorities, such as the European Medicines Agency, 
or EMA, impose similar requirements. We, and any collaborators, must complete extensive preclinical development and clinical 
trials to demonstrate the safety and efficacy of emavusertib in humans before we will be able to obtain these approvals.
Clinical testing is expensive, difficult to design and implement, can take many years to complete and is inherently 
uncertain as to outcome. We cannot guarantee that any clinical trials will be conducted as planned or completed on schedule, if 
at all. The clinical development of drug candidates generally, and emavusertib specifically, is susceptible to the risk of failure 
inherent at any stage of drug development. 
We, or any collaborators, may experience any of a number of possible unforeseen adverse events in connection with 
clinical trials of emavusertib, many of which are beyond our control and any of which could adversely affect our business, 
financial condition, operations and prospects and cause a decline in our stock price, including: 
•
we, or our collaborators, may fail to demonstrate efficacy in a clinical trial or across a broad population of patients;
•
it is possible that even if emavusertib has a beneficial effect, that effect will not be detected during clinical evaluation 
as a result of one or more of a variety of factors, including the size, duration, design, measurements, conduct or 
analysis of our clinical trials. Conversely, as a result of the same factors, our clinical trials may indicate an apparent 
positive effect of emavusertib that is greater than the actual positive effect, if any;
•
adverse events or undesirable side effects caused by, or other unexpected properties of, emavusertib could cause us, 
any collaborators, an institutional review board or regulatory authorities to interrupt, delay or halt clinical trials of 
emavusertib and could result in a more restrictive label or the delay or denial of marketing approval by the FDA or 
comparable foreign regulatory authorities; 
•
we cannot be certain that we will not observe safety events in our clinical trials, which may lead to future clinical 
holds, or necessitate additional or amended trials.
•
if emavusertib is associated with adverse events or undesirable side effects or has properties that are unexpected, we, 
or any collaborators, may need to abandon development or limit its development to certain uses or subpopulations in 
which the undesirable side effects or other characteristics are less prevalent, less severe or more acceptable from a 
risk-benefit perspective. 
•
regulators or institutional review boards may not authorize us or our investigators to commence a clinical trial or 
conduct a clinical trial at a prospective trial site;
•
we, or any collaborators, may have delays in reaching or fail to reach agreement on acceptable clinical trial contracts 
or clinical trial protocols with prospective trial sites;
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•
clinical trials of emavusertib may produce unfavorable or inconclusive results, including with respect to its safety, 
tolerability, efficacy, or pharmacodynamic and pharmacokinetic profile;
•
we, or any collaborators, may decide, or regulators may require us, to conduct additional clinical trials or abandon our 
drug development program;
•
the number of patients required for clinical trials of emavusertib may be larger than we anticipate, patient enrollment 
in these clinical trials may be slower than we anticipate or participants may drop out of these clinical trials at a higher 
rate than we anticipate;
•
our estimates of the patient populations available for study may be higher than actual patient numbers and result in 
our inability to sufficiently enroll our trials;
•
the cost of planned clinical trials of emavusertib may be greater than we anticipate;
•
our third party contractors, including those manufacturing emavusertib or components or ingredients thereof or 
conducting clinical trials on our behalf, may fail to comply with regulatory requirements or meet their contractual 
obligations to us in a timely manner or at all;
•
patients that enroll in a clinical trial may misrepresent their eligibility to do so or may otherwise not comply with the 
clinical trial protocol, resulting in the need to drop the patients from the clinical trial, increase the needed enrollment 
size for the clinical trial or extend the clinical trial’s duration;
•
the FDA or comparable foreign regulatory authorities may disagree with our, or any collaborators', clinical trial 
designs or our or their interpretation of data from preclinical studies and clinical trials;
•
the FDA or comparable foreign regulatory authorities may fail to approve or subsequently find fault with the 
manufacturing processes or facilities of third party manufacturers with which we, or any collaborators, enter into 
agreements for clinical and commercial supplies;
•
the supply or quality of raw materials or manufactured emavusertib or other materials necessary to conduct clinical 
trials of emavusertib may be insufficient, inadequate or not available at an acceptable cost, or we may experience 
interruptions in supply; 
•
the approval policies or regulations of the FDA or comparable foreign regulatory authorities may significantly change 
in a manner rendering our clinical data insufficient to obtain marketing approval; 
•
constraints on our, or any collaborators’, ability to conduct or complete clinical trials for emavusertib, including 
slowdowns in patient enrollment, restrictions on patient monitoring at hospital clinical trial sites, closures of third 
party facilities, and other disruptions to clinical trial activities; and
•
any delay in enrolling patients or our inability to continue or complete our clinical trials of emavusertib will delay or 
may cause us to terminate our clinical development plans for emavusertib, may require us to incur additional clinical 
development costs, may slow down our drug candidate development and approval process, and could impair our 
ability to ultimately obtain FDA approval for emavusertib and commence product sales and generate revenue.
The therapeutic efficacy of emavusertib is unproven in humans, and we may not be able to successfully develop and 
commercialize emavusertib.
Emavusertib is a novel chemical and biologic entity and its potential benefit as a therapeutic cancer drug is unproven. For 
example, emavusertib may not prove to be an effective inhibitor of the molecular targets its being designed to act against, and 
may not demonstrate in patients any or all of the pharmacological benefits that may have been demonstrated in preclinical 
studies. Emavusertib may interact with human biological systems in unforeseen, ineffective or harmful ways. If the FDA 
determines that emavusertib is associated with significant side effects or has characteristics that are unexpected, we may need to 
delay or abandon its development or limit development to certain uses or subpopulations in which the undesirable side effects 
or other characteristics are less prevalent, less severe or more acceptable from a risk benefit perspective. Moreover, we may 
determine after conducting clinical trials or related studies that emavusertib does not possess the anticipated therapeutic 
characteristics, and we may decide to abandon or discontinue any one of our clinical studies. 
Moreover, many drug candidates that initially showed promise in early stage testing for treating cancer have later been 
found to cause side effects that prevented further development of the compound or resulted in their removal from the market. 
As a result of these and other risks described herein that are inherent in the development and commercialization of novel 
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therapeutic agents, we may not successfully develop or commercialize emavusertib, in which case we will not achieve 
profitability and the value of our stock will likely decline.
If we experience delays in the enrollment of patients in our clinical trials of emavusertib, our receipt of necessary 
regulatory approvals could be delayed or prevented. 
We may not be able to initiate or continue clinical trials for emavusertib if we are unable to locate and enroll a sufficient 
number of eligible patients to participate in these trials. Patient enrollment is a significant factor in the timing of clinical trials, 
and is affected by many factors, including:
•
our ability to successfully enroll patients with primary central nervous system lymphoma in the TakeAim Lymphoma 
Phase 1/2 study;
•
the size and nature of the patient population;
•
the severity of the disease under investigation;
•
the availability of approved therapeutics for the relevant disease;
•
the proximity of patients to clinical sites;
•
the eligibility criteria and design for the trial;
•
efforts to facilitate timely enrollment;
•
competing clinical trials; and
•
clinicians’ and patients’ perceptions as to the potential advantages and risks of the drug being studied in relation to 
other available therapies, including any new drugs that may be approved for the indications we are investigating.
In addition, many of our competitors have ongoing clinical trials for drug candidates that could be competitive with 
emavusertib. Patients who would otherwise be eligible for our clinical trials may instead enroll in clinical trials of our 
competitors’ drug candidates or rely upon treatment with existing therapies that may preclude them from eligibility for our 
clinical trials.
Our inability to enroll a sufficient number of patients for our clinical trials could result in significant delays or may 
require us to abandon one or more clinical trials altogether and may result in increased development costs for our drug 
candidates, which would likely cause the value of our stock price to decline.
Results of preclinical studies and early clinical trials may not be predictive of results of future late stage clinical trials, 
and interim, “top-line,” initial, and preliminary data from our clinical trials may change as more patient data become 
available or as additional analyses are conducted and audit and verification procedures could result in material changes 
to the final data.
We cannot assure you that we will be able to replicate in human clinical trials the results we observed in animal models. 
Moreover, the outcome of preclinical studies and early clinical trials may not be predictive of the success of later clinical trials, 
and interim results of clinical trials do not necessarily predict success in future clinical trials. Many companies in the 
pharmaceutical and biotechnology industries have suffered significant setbacks in late stage clinical trials after achieving 
positive results in earlier development, and we could face similar setbacks. The design of a clinical trial can determine whether 
its results will support approval of a drug and flaws in the design of a clinical trial may not become apparent until the clinical 
trial is well advanced. In addition, preclinical and clinical data are often susceptible to varying interpretations and analyses. 
Many companies that believed their drug candidates performed satisfactorily in preclinical studies and clinical trials have 
nonetheless failed to obtain marketing approval for the drug candidates. Even if we, or any collaborators, believe that the results 
of clinical trials for a drug candidate warrants marketing approval, the FDA or comparable foreign regulatory authorities may 
disagree and may not grant marketing approval of such drug candidate.
In some instances, there can be significant variability in safety or efficacy results between different clinical trials of the 
same drug candidate due to numerous factors, including changes in trial procedures set forth in protocols, differences in the size 
and type of the patient populations, changes in and adherence to the dosing regimen and other clinical trial protocols and the 
rate of dropout among clinical trial participants. If we fail to receive positive results in clinical trials of emavusertib, the 
development timeline and regulatory approval and commercialization prospects for emavusertib, and, correspondingly, our 
business and financial prospects would be negatively impacted.
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In addition, from time to time, we publish interim, “top-line,” initial, or preliminary data from our clinical studies. 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. Initial, preliminary or “top-line” data also 
remain subject to audit and verification procedures that may result in the final data being materially different from the data we 
previously published. As a result, interim, “top-line,” initial, and preliminary data should be viewed with caution until the final 
data are available. Material adverse changes between such data and final published data could significantly harm our business 
prospects.
We have never obtained marketing approval for a drug candidate and we may be unable to obtain, or may be delayed in 
obtaining, marketing approval for emavusertib or any future drug candidates that we, or any future collaborators, may 
develop.
We have never obtained marketing approval for a drug candidate. It is possible that the FDA may refuse to accept for 
substantive review any new drug applications, or NDAs, that we submit for a drug candidate such as emavusertib or may 
conclude after review of our data that our application is insufficient to obtain marketing approval of a drug candidate. For 
example, the FDA does not accept or approve our NDAs for emavusertib, it may require that we conduct additional clinical 
trials, preclinical studies or manufacturing validation studies and submit that data before it will reconsider our application. 
Depending on the extent of these or any other FDA-required trials or studies, approval of such NDA may be delayed by several 
years, or may require us to expend more resources than we have available. It is also possible that additional trials or studies, if 
performed and completed, may not be considered sufficient by the FDA to approve such NDAs. Any delay in obtaining, or an 
inability to obtain, marketing approvals would prevent us from commercializing emavusertib or any future drug candidates that 
we or any future collaborators may develop, or any companion diagnostics, generating revenues and achieving and sustaining 
profitability. If any of these outcomes occur, we may be forced to abandon our development efforts, which could significantly 
harm our business.
Even if any drug candidates that we, or any collaborators, may develop receive marketing approval, we or others may 
later discover that the drug is less effective than previously believed or causes undesirable side effects that were not 
previously identified, which could compromise our ability, or that of any collaborators, to market the drug.
It is possible that our clinical trials, or those of any collaborator, may indicate an apparent positive effect of a drug 
candidate that is greater than the actual positive effect, if any, or alternatively fail to identify undesirable side effects. If, 
following approval of a drug candidate, we, or others, discover that the drug is less effective than previously believed or causes 
undesirable side effects that were not previously identified, any of the following adverse events could occur:
•
regulatory authorities may withdraw their approval of the drug or seize the drug;
•
we, or any future collaborators, may be required to recall the drug, change the way the drug is administered or 
conduct additional clinical trials;
•
additional restrictions may be imposed on the marketing of, or the manufacturing processes for, the particular drug;
•
we may be subject to fines, injunctions or the imposition of civil or criminal penalties;
•
regulatory authorities may require the addition of labeling statements, such as a “black box” warning or a 
contraindication;
•
we, or any future collaborators, may be required to create a Medication Guide outlining the risks of the previously 
unidentified side effects for distribution to patients;
•
we, or any future collaborators, could be sued and held liable for harm caused to patients;
•
the drug may become less competitive; and
•
our reputation may suffer.
Any of these events could harm our business and operations, and could negatively impact our stock price.
Even if emavusertib receives marketing approval, it may fail to achieve the degree of market acceptance by physicians, 
patients, third party payors and others in the medical community necessary for commercial success, in which case we 
may not generate significant revenues or become profitable.
We have never commercialized a drug, and even if emavusertib is approved by the appropriate regulatory authorities for 
marketing and sale, it may nonetheless fail to gain sufficient market acceptance by physicians, patients, third party payors and 
others in the medical community. Physicians are often reluctant to switch their patients from existing therapies even when new 
and potentially more effective or convenient treatments enter the market. Further, patients often acclimate to the therapy that 
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they are currently taking and do not want to switch unless their physicians recommend switching drugs or they are required to 
switch therapies due to lack of reimbursement for existing therapies.
Efforts to educate the medical community and third party payors on the benefits of emavusertib may require significant 
resources and may not be successful. If emavusertib is approved but does not achieve an adequate level of market acceptance, 
we may not generate significant revenues and we may not become profitable. The degree of market acceptance of emavusertib, 
if approved for commercial sale, will depend on a number of factors, including:
•
the efficacy and safety of the drug;
•
the potential advantages of the drug compared to competitive therapies;
•
the prevalence and severity of any side effects;
•
whether the drug is designated under physician treatment guidelines as a first-, second- or third-line therapy;
•
our ability, or the ability of any future collaborators, to offer the drug for sale at competitive prices;
•
the drug’s convenience and ease of administration compared to alternative treatments;
•
the willingness of the target patient population to try, and of physicians to prescribe, the drug and patient adherence to 
the drug’s dosing regimen once prescribed;
•
limitations or warnings, including distribution or use restrictions, contained in the drug’s approved labeling;
•
the strength of sales, marketing and distribution support;
•
changes in the standard of care for the targeted indications for the drug; and
•
availability and amount of coverage and reimbursement from government payors, managed care plans and other third 
party payors.
We may expend our limited resources to pursue a particular drug candidate or indication and fail to capitalize on drug 
candidates or indications that may be more profitable or for which there is a greater likelihood of success.
Because we have limited financial and managerial resources, we focus on our research and clinical development program 
for emavusertib as we believe it may have the best potential in certain specific indications. As a result, we have and may delay 
or forgo pursuit of certain opportunities with our other drug candidates or for other indications that later prove to have greater 
commercial potential. Our resource allocation decisions may cause us to fail to capitalize on viable commercial drugs or 
profitable market opportunities. Our spending on current and future proprietary research and development program for 
emavusertib for specific indications may not yield any commercially viable drug. If we do not accurately evaluate the 
commercial potential or target market for a particular drug candidate, we may relinquish valuable rights to that drug candidate 
through collaboration, licensing or other royalty arrangements in cases in which it would have been more advantageous for us 
to retain sole development and commercialization rights to such drug candidate. 
We currently have no sales, marketing, or distribution experience and, as such, we must build infrastructure related to 
product sales, marketing and distribution or make arrangements with third parties to perform these services, and any 
such third parties may not successfully market or sell any drugs we develop.
We currently have no sales, marketing, or drug distribution experience or capabilities. If we receive required regulatory 
approvals to commercialize emavusertib, we may plan to rely primarily on sales, marketing and distribution arrangements with 
third parties, including our collaborative partners. For example, as part of our agreements with Genentech, we have granted 
Genentech the exclusive rights to distribute drugs resulting from such collaboration, and Genentech is currently 
commercializing Erivedge. We may have to enter into additional marketing and/or sales arrangements in the future and we may 
not be able to enter into these additional arrangements on terms that are favorable to us, if at all. In addition, we may have 
limited or no control over the sales, marketing, and distribution activities of these third parties, and sales through these third 
parties could be less profitable for us than direct sales. These third parties could sell competing drugs and may devote 
insufficient sales efforts or resources to our drugs. Our future revenues will be materially dependent upon the successful efforts 
of these third parties.
We may seek to independently market and sell emavusertib. If we undertake to perform sales, marketing and distribution 
functions ourselves, we could face a number of additional risks, including:
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•
we may not be able to attract and build a significant and skilled marketing staff or sales force;
•
the cost of establishing a marketing staff or sales force may not be justifiable in light of the revenues generated by any 
particular drug; and
•
our direct sales and marketing efforts may not be successful.
We face substantial competition, and our competitors may discover, develop or commercialize drugs before or more 
successfully than we do. 
Emavusertib and Erivedge, our outlicensed program, face competition from existing and new technologies and drugs 
being developed by biotechnology, medical device, and pharmaceutical companies, as well as universities and other research 
institutions. There are several companies developing drug candidates that target the same molecular targets and signaling 
pathways, and in some cases the same cancer indications, which are being pursued by us. 
 Emavusertib. 
We believe our primary competitors for emavusertib are those companies pursuing oncology indications in IRAK4, R/R 
AML or hrMDS with a FLT3 mutation, R/R PCNSL, and frontline AML combinations with azacitidine and venetoclax. 
Companies pursuing IRAK 4 inhibitors include a pre-clinical stage company, Kurome Therapeutics (IRAK1/4) and a 
clinical stage company, Rigel Pharmaceuticals, Inc. (R289). 
Astellas Pharma, Inc. (gilteritinib) has an approved FLT3 inhibitor. Other companies developing FLT3 inhibitors include: 
Aptose Biosciences, Inc. (tuspetinib), HEC Pharma Co., Ltd. (HEC73543), Ellipses Pharma (EP0042), CSPC Pharmaceuticals 
Group Limited (SKLB1028), and Eilean Therapeutics (lomonitnib).
Abbvie, Inc. has an approved BTK inhibitor, ibrutinib, which is being used pursuant to the National Comprehensive 
Cancer Network guidelines as a treatment for PCNSL. Other companies pursuing R/R PCNSL are Bayer AG (copanlisib in 
combination with ibrutinib), Gilead Sciences, Inc. (axicabtagene ciloleucel), Ono Pharmaceuticals Co., Ltd. (tirabrutinib), and 
BeiGene, Ltd. (zanubrutinib in combination with rituximab and methotrexate). Additionally, there are several marketed 
products that are being studied in combination as potential treatments for PCNSL (ibrutinib, rituximab and lenalidomide).
Companies pursuing frontline AML in combination with either azacitidine and venetoclax, or both, include: Faron 
Pharmaceuticals Oy (bexmarilimab), Novartis AG (sabatolimab), OncoVerity, Inc. (cusatuzumab), Glycomimetics, Inc. 
(uproleselan), Bio-Path Holdings, Inc. (prexigebersen), Astellas Pharma, Inc. (gilteritinib), and ImmunoGen, Inc. (pivekimab 
sunirine).
Erivedge 
We are aware of several companies that have clinical development programs relating to compounds that modulate the 
Hedgehog signaling pathway and may compete with Erivedge, including PellePharm, Inc. (patidegib), and Cyclene 
Pharmaceuticals Inc./Senhwa Biosciences Inc. (silmitasertib / CX-4945). Furthermore, glasdegib (Daurismo™) is marketed by 
Pfizer Inc. for the treatment of newly diagnosed adult AML patients for whom intensive chemotherapy is not an option, and 
sonidegib (Odomzo™) is marketed by Sun Pharmaceutical for the treatment of adults with locally advanced BCC. Under the 
terms of our collaboration agreement with Genentech, our royalty on sales of Erivedge has been reduced and may be further 
reduced as a result of sales of sonidegib.
Many of our competitors have substantially greater capital resources, research and development staff and facilities, and 
more extensive experience than we have. As a result, efforts by other biotechnology, medical device and pharmaceutical 
companies could render our programs or drugs uneconomical or result in therapies superior to those that we develop alone or 
with a collaborator. We face competition from companies that are more experienced in drug development and 
commercialization, obtaining regulatory approvals and drug manufacturing. Mergers and acquisitions in the pharmaceutical and 
biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors. 
Other smaller companies may also prove to be significant competitors, particularly through collaborative arrangements with 
large and established companies. These third parties compete with us in recruiting and retaining qualified scientific and 
management personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring 
technologies complementary to, or necessary for, our program. As a result, any of these companies may be more successful in 
obtaining collaboration agreements or other monetary support, approval and commercialization of their drugs and/or may 
develop competing drugs more rapidly and/or at a lower cost.
If we are not able to compete effectively, then we may not be able, either alone or with others, to advance the 
development and commercialization of emavusertib or Erivedge, which would adversely affect our ability to grow our business 
and become profitable.
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Even if we, or any collaborators, are able to commercialize any drug candidate that we, or they, develop, the drug may 
become subject to unfavorable pricing regulations, third party payor reimbursement practices or healthcare reform 
initiatives, any of which could harm our business.
The commercial success of any drug candidate that we, or any collaborators, may develop will depend substantially, both 
domestically and abroad, on the extent to which the costs of such drug candidate will be paid by third party payors, including 
government health care programs and private health insurers. If coverage is not available, or reimbursement is limited, we, or 
any collaborators, may not be able to successfully commercialize the drug candidate. Even if coverage is provided, the 
approved reimbursement amount may not be high enough to allow us, or any collaborators, to establish or maintain pricing 
sufficient to realize a sufficient return on our or their investments. In the U.S., no uniform policy of coverage and 
reimbursement for drugs exists among third party payors and coverage and reimbursement levels for drugs 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 our drugs to each payor separately, with no assurance 
that coverage and adequate reimbursement will be applied consistently or obtained in the first instance.
There is significant uncertainty related to third party payor coverage and reimbursement of newly approved drugs. 
Marketing approvals, pricing and reimbursement for new drug products vary widely from country to country. Some countries 
require approval of the sale price of a drug before it can be marketed. In many countries, the pricing review period begins after 
marketing or drug licensing approval is granted. In some foreign markets, prescription pharmaceutical pricing remains subject 
to continuing governmental control even after initial approval is granted. As a result, we, or any future collaborators, might 
obtain marketing approval for a drug in a particular country, but then be subject to price regulations that delay commercial 
launch of the drug, possibly for lengthy time periods, which may negatively impact the revenues we are able to generate from 
the sale of the drug in that country. Adverse pricing limitations may hinder our ability or the ability of any future collaborators 
to recoup our or their investment in one or more drug candidates, even if the drug candidate obtains marketing approval.
Patients who are provided medical treatment for their conditions generally rely on third party payors to reimburse all or 
part of the costs associated with their treatment. Therefore, our ability, and the ability of any future collaborators, to 
successfully commercialize emavusertib will depend in part on the extent to which coverage and adequate reimbursement for 
the drug and related treatments will be available from third party payors. Third party payors decide which medications they will 
cover and establish reimbursement levels. The healthcare industry is acutely focused on cost containment, both in the U.S. and 
elsewhere. Government authorities and other third party payors have attempted to control costs by limiting coverage and the 
amount of reimbursement for particular medications, which could affect our ability or that of any future collaborators to sell our 
drug candidates profitably. These payors may not view our drug as cost-effective, and coverage and reimbursement may not be 
available to our customers, or those of any future collaborators, or may not be sufficient to allow our drug to be marketed on a 
competitive basis. Cost-control initiatives could cause us, or any future collaborators, to decrease the price we, or they, might 
establish for our drug, which could result in lower than anticipated drug revenues. If the prices for our drug, if any, decrease or 
if governmental and other third party payors do not provide coverage or adequate reimbursement, our prospects for revenue and 
profitability will suffer.
There may also be delays in obtaining coverage and reimbursement for newly approved drugs, and coverage may be more 
limited than the indications for which the drug is approved by the FDA or comparable foreign regulatory authorities. Moreover, 
eligibility for reimbursement does not imply that any drug will be paid for in all cases or at a rate that covers our costs, 
including research, development, manufacture, sale and distribution. Reimbursement rates may vary, by way of example, 
according to the use of the drug and the clinical setting in which it is used. Reimbursement rates may also be based on 
reimbursement levels already set for lower cost drugs or may be incorporated into existing payments for other services.
In addition, increasingly, third party payors are requiring higher levels of evidence of the benefits and clinical outcomes 
of new technologies and are challenging the prices charged. Further, the net reimbursement for drug products may be subject to 
additional reductions if there are changes to laws that presently restrict imports of drugs from countries where they may be sold 
at lower prices than in the U.S. An inability to promptly obtain coverage and adequate payment rates from both government-
funded and private payors for any drug candidate for which we, or any future collaborator, obtain marketing approval could 
significantly harm our operating results, our ability to raise capital needed to commercialize drugs and our overall financial 
condition.
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Product liability lawsuits against us or our collaborators could divert our resources, cause us to incur substantial 
liabilities and limit commercialization of any drugs that we may develop.
We and our collaborators face a risk of product liability claims, which could expose us and them to significant liabilities 
and costs and prevent or interfere with the development or commercialization of any drug candidates or drugs that we may 
develop. Any such product liability claims may include allegations of defects in manufacturing, defects in design, a failure to 
warn of dangers inherent in the drug, negligence, strict liability or a breach of warranties. Claims could also be asserted under 
state consumer protection acts. If we or our collaborators cannot successfully defend ourselves against product liability claims, 
we or our collaborators may incur substantial liabilities or be required to limit commercialization of any drug candidates or 
drugs that we may develop. Regardless of their merit or eventual outcome, such liability claims would require us to spend 
significant time, money and other resources to defend such claims, and could result in decreased demand for any drug 
candidates or drugs that we may develop, injury to our reputation and significant loss of revenue. 
Although we currently have product liability insurance for our clinical trials, this insurance is subject to deductibles and 
coverage limitations and may not be adequate in scope to protect us in the event of a successful product liability claim.
RISKS RELATING TO OUR DEPENDENCE ON THIRD PARTIES
We may not be successful in establishing additional strategic collaborations, which could adversely affect our ability to 
develop and commercialize emavusertib, which we have strategically determined to pursue with a collaborator.
We may seek corporate collaborators or licensees for the further development and commercialization of emavusertib in 
one or more geographic territories, particularly in territories outside of the U.S. We face significant competition in seeking 
appropriate collaborators and a number of recent business combinations in the biotechnology and pharmaceutical industry may 
result in a reduced number of potential future collaborators. In addition, collaborations are complex and time-consuming to 
negotiate and document. We may not be able to negotiate collaborations on a timely basis, on acceptable terms, or at all. If we 
are unable to do so, we may have to curtail the development of emavusertib, reduce or delay its development program, delay its 
potential commercialization or reduce the scope of any sales or marketing activities, or increase our expenditures and undertake 
development or commercialization activities at our own expense. Moreover, we may not be successful in our efforts to establish 
a collaboration or other alternative arrangements because our research and development pipeline may be insufficient, our 
program may be deemed to be at too early of a stage of development for collaborative effort and/or third parties may not view 
emavusertib as having the requisite potential to demonstrate safety and efficacy or as sufficiently differentiated compared to 
existing or emerging treatments. We are also restricted under the terms of certain of our existing collaboration agreements from 
entering into collaborations regarding or otherwise developing drug candidates that are similar to the drug candidates that are 
subject to those agreements, such as developing drug candidates that inhibit the same molecular target. In addition, 
collaboration agreements that we enter into in the future may contain further restrictions on our ability to enter into potential 
collaborations or to otherwise develop emavusertib. Even if we are successful in our efforts to establish new collaborations, the 
terms that we agree upon may not be favorable to us and such collaboration agreements may not lead to development or 
commercialization of drug candidates in the most efficient manner, or at all.
Moreover, if we fail to establish and maintain one or more collaborations for emavusertib:
•
the development of emavusertib may be terminated or delayed;
•
our cash expenditures related to development of emavusertib would increase significantly and we may need to seek 
additional financing;
•
we may be required to hire additional employees or otherwise develop additional expertise, such as clinical, 
regulatory, sales and marketing expertise, for which we have not budgeted;
•
we will have to bear all of the risk related to the development of emavusertib; and
•
our future prospects may be adversely affected and our stock price could decline.
We rely in part on third parties to conduct clinical trials of emavusertib, and if such third parties perform inadequately, 
including failing to meet deadlines for the completion of such trials, research or testing, then we may not be able to 
successfully develop and commercialize emavusertib and grow our business. 
We rely heavily on third parties such as consultants, clinical investigators, contract research organizations and other 
similar entities to complete certain aspects of our preclinical testing and clinical trials and provide services in connection with 
such clinical trials, and expect to continue to do so for the foreseeable future. Despite having contractual remedies available to 
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us under our agreements with such contractors, we cannot control whether or not they devote sufficient time, skill and resources 
to our ongoing development program. Furthermore, these third parties may also have relationships with other entities, some of 
which may be our competitors. These third parties may not complete activities on schedule, or at all, or may not conduct our 
clinical trials in accordance with the established clinical trial protocol or design. In addition, the FDA and its foreign 
equivalents require us to comply with certain standards, referred to as “good clinical practices,” and applicable regulatory 
requirements, for conducting, recording and reporting the results of clinical trials. These requirements assure that data and 
reported results are credible and accurate and that the rights, integrity and confidentiality of trial participants are protected. Our 
reliance on third parties does not relieve us of these responsibilities and requirements. If any of our third party contractors do 
not comply with good clinical practices or other applicable regulatory requirements, we may not be able to use the data and 
reported results from the applicable trial. Any failure by a third party to conduct our clinical trials as planned or in accordance 
with regulatory requirements could delay or otherwise adversely affect our efforts to obtain regulatory approvals for and 
commercialize emavusertib.
We depend on third parties to produce emavusertib, and if these third parties do not successfully formulate or 
manufacture the drug candidate, our business could be harmed. 
In order to continue to develop emavusertib, apply for regulatory approvals, and commercialize the drug candidate, as 
applicable, we or any collaborators must be able to manufacture emavusertib in adequate clinical and commercial quantities, in 
compliance with regulatory requirements, including those related to quality control and quality assurance, at acceptable costs 
and in a timely manner. The manufacture of emavusertib may be complex, may be difficult to accomplish and may be difficult 
to scale-up when large-scale production is required. Manufacture may be subject to delays, inefficiencies and low yields of 
quality drugs. The cost of manufacturing emavusertib may be prohibitively expensive.
To the extent that we or any collaborators seek to enter into manufacturing arrangements with third parties, we and such 
collaborators will depend upon these third parties to perform their obligations in a timely and effective manner and in 
accordance with government regulations. We may be unable to establish any agreements with contract manufacturers or to do 
so on acceptable terms. Contract manufacturers may breach their manufacturing agreements because of factors beyond our and 
our collaborators’ control, or may terminate or fail to renew a manufacturing agreement based on their own business priorities, 
becoming costly and/or inconvenient for us and our collaborators. Even if we are able to establish agreements with contract 
manufacturers, reliance on contract manufacturers entails additional risks, including:
•
manufacturing delays if our third party contractors give greater priority to the supply of other products over our drug 
candidate or otherwise do not satisfactorily perform according to the terms of the agreements between us and them, or 
if unforeseen events in the manufacturing process arise;
•
the failure of third party contractors to comply with applicable regulatory requirements;
•
the possible mislabeling of clinical supplies, potentially resulting in the wrong dose amounts being supplied or active 
drug or placebo not being properly identified;
•
the possibility of clinical supplies not being delivered to clinical sites on time, leading to clinical trial interruptions, or 
of drug supplies not being distributed to commercial vendors in a timely manner, resulting in lost sales; and
•
the possible misappropriation of our proprietary information, including our trade secrets and know-how.
Any manufacturing problem, the loss of a contract manufacturer or any loss of storage could be disruptive to our 
operations, delay our clinical trials and, if our products are approved for sale, result in lost sales.
Any contract manufacturers with whom we or our collaborators enter into manufacturing arrangements will be subject to 
ongoing periodic, unannounced inspection by the FDA and state and foreign agencies or their designees to ensure strict 
compliance with current good manufacturing practices and other governmental regulations and corresponding foreign 
standards. Any failure by contract manufacturers, collaborators, or us to comply with applicable regulations could result in 
sanctions being imposed, including fines, injunctions, civil penalties, denial by regulatory authorities of marketing approval for 
our drug candidate, delays, suspension or withdrawal of approvals, imposition of clinical holds, seizures or recalls of our drug 
candidate, operating restrictions and criminal prosecutions, any of which could significantly and adversely affect our business. 
If we or a collaborator need to change manufacturers, the FDA and corresponding foreign regulatory agencies must approve 
any new manufacturers in advance. This would involve testing and pre-approval inspections to ensure compliance with FDA 
and foreign regulations and standards.
If third party manufacturers fail to perform their obligations, our competitive position and ability to generate revenue may 
be adversely affected in a number of ways, including:
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•
we, and any collaborators, may not be able to initiate or continue certain preclinical and/or clinical trials of our drug 
candidate under development;
•
we, and any collaborators, may be delayed in submitting applications for regulatory approvals for our drug candidate; 
and
•
we, and any collaborators, may not be able to meet commercial demand for any approved drug products.
Because we rely on a limited number of suppliers for the raw materials used in emavusertib, any delay, shortage or 
interruption in the supply of such raw materials or contamination in our manufacturing process could lead to delays in 
the manufacture and supply of emavusertib.
We rely on third parties to supply certain raw materials necessary to produce emavusertib for preclinical studies and 
clinical trials. There are a small number of suppliers for certain raw materials that we use to manufacture our drug candidate. 
We purchase these materials from our suppliers on a purchase order basis and do not have long-term supply agreements in 
place, which exposes us to a variety of risks, including a potential inability to obtain critical materials and reduced control over 
production costs, delivery schedules, reliability and quality. Additionally, our suppliers are subject to risks related to cyber 
attacks that could cause disruptions in manufacturing. Any unanticipated disruption to our contract manufacturing caused by 
problems at suppliers could delay shipment of our drug candidate, increase our cost of goods sold and result in lost sales with 
respect to any approved products. Suppliers may extend lead times, limit supplies, or increase prices due to capacity constraints 
or other factors beyond our control. Any significant delay in the supply of raw materials for our drug candidate for a preclinical 
study or an ongoing clinical trial due to the need to replace a third party supplier could considerably delay completion of certain 
preclinical studies and/or clinical trials. Moreover, if we are unable to purchase sufficient raw materials after regulatory 
approval for our drug candidate, the commercial launch of our drug candidate could be delayed, or there could be a supply 
shortage, each of which would impair our ability to generate revenues from their sale.
In addition, a material shortage, contamination, recall or restriction on the use of substances in the manufacture of our 
drug candidate, or the failure of any of our key suppliers to deliver necessary components required for the manufacture of our 
drug candidate, could adversely impact or disrupt the commercial manufacture or the production of clinical material, which 
could materially and adversely affect our development timelines and our business, financial condition, results of operations, and 
future prospects.
We are reliant on Genentech and Roche for the successful commercialization of Erivedge. If Genentech and Roche do 
not successfully commercialize Erivedge for metastatic BCC and/or advanced BCC, our future revenue may be 
substantially harmed.
Our levels of revenue in each period depend upon Genentech’s ability to successfully continue to commercialize 
Erivedge for patients with metastatic BCC and/or advanced BCC and to demonstrate its superiority over existing therapies and 
standards of care. Product sales of Erivedge could be unsuccessful if:
•
Erivedge becomes no longer accepted as safe, efficacious, cost-effective and preferable for the treatment of advanced 
BCC to current therapies in the medical community or future competing drug products and by third party payors;
•
Genentech and/or Roche do not continue to develop and implement effective marketing, sales and distribution 
strategies and operations, including a commercially viable manufacturing process that is compliant with current good 
manufacturing practices, for development and commercialization of Erivedge for metastatic and/or advanced BCC;
•
we, Genentech, or Roche encounter third party patent interference, derivation, inter partes review, post grant review, 
reexamination or patent infringement claims with respect to Erivedge;
•
Genentech and/or Roche do not comply with regulatory and legal requirements applicable to the sale of Erivedge for 
metastatic and/or advanced BCC; or 
•
Genentech does not exercise its first right to maintain or defend intellectual property rights associated with Erivedge.
We depend on third parties for the research and, as applicable, development and commercialization of our drug 
candidates. If one or more of our collaborators fails or delays in developing or, as applicable, commercializing our drug 
candidates based upon our technologies, our business prospects and operating results could suffer and our stock price 
could decline.
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Pursuant to our collaboration with Genentech, we have granted to Genentech exclusive rights to develop and 
commercialize drugs based upon our Hedgehog signaling pathway technologies. Collaborations involving our drug candidates, 
including our collaborations with Aurigene and Genentech, pose the following risks to us:
•
Our collaborators each have significant discretion in determining the efforts and resources that they will apply to their 
respective collaboration with us. If a collaborator fails to allocate sufficient time, attention and resources to our 
collaboration, the successful development and commercialization of drug candidates under such collaboration is 
likely to be adversely affected. 
•
Our collaborators may develop and commercialize, either alone or with others, drugs that are similar to or competitive 
with the drug candidates that are the subject of our respective collaborations. For example, Genentech and Roche are 
involved in the commercialization of many cancer medicines and are seeking to develop several other cancer drug 
therapies, and Aurigene has other active cancer-focused discovery programs and has also entered into license 
agreements with other companies that focus on cancer therapies.
•
Our collaborators may change the focus of their development and commercialization efforts or pursue higher-priority 
programs and there can be no assurance that third parties engaged to develop or commercialize our drug candidates or 
products will succeed in developing or commercializing our products or devote sufficient resources to the 
development or commercialization of our drug candidates or products. In addition, potential competitors may have 
substantially greater financial and other resources and may be able to expend more funds and effort with respect to 
competing products than Genentech or other third parties engaged by us.
•
Our collaborators may enter into one or more transactions with third parties, including a merger, consolidation, 
reorganization, sale of substantial assets, sale of substantial stock or change of control. Any such transaction could 
divert the attention of our collaborative partner’s management and adversely affect its ability to retain and motivate 
key personnel who are important to the continued development of the program under such collaboration. In addition, 
an acquirer could determine to reprioritize our collaborator’s development program such that our collaborator ceases 
to diligently pursue the development of our program, and/or terminates our collaboration.
•
Our collaborators may, under specified circumstances, terminate their collaborations with us on short notice and for 
circumstances outside of our control, which could make it difficult for us to attract new collaborators or adversely 
affect how we are perceived in the scientific, biotech, pharma and financial communities.
•
Our collaborators may utilize our intellectual property rights in such a way as to invite litigation that could jeopardize 
or invalidate our intellectual property rights, or expose us to potential liability.
•
Disputes may arise between collaborators and us regarding ownership of or other rights in the intellectual property 
generated in the course of the collaborations.
•
If any of our collaborators were to breach or terminate its arrangement with us, the development and 
commercialization of the affected drug candidate or program could be delayed, curtailed or terminated.
RISKS RELATING TO EMPLOYEE MATTERS AND MANAGING GROWTH
If we are not able to attract and retain key management and scientific personnel and advisors, we may not successfully 
develop emavusertib or achieve our other business objectives.
We depend upon our senior management team. The loss of the service of any of the key members of our senior 
management may significantly delay or prevent the achievement of drug development and other business objectives. Our 
officers all serve pursuant to “at will” employment arrangements and can terminate their employment with us at any time. We 
do not maintain “key person” insurance for any of our executives or other employees. In the future, we may be dependent on 
other members of our management, scientific and development team.
Our ability to compete in the biotechnology and pharmaceutical industries depends upon our ability to attract and retain 
highly qualified managerial, scientific and medical personnel. Our industry has experienced a high rate of turnover of 
management personnel in recent years. If we lose one or more of our executive officers or other key employees, our ability to 
successfully implement our business strategy could be seriously harmed. Furthermore, replacing executive officers or other key 
employees may be difficult and take an extended period of time because of the limited number of individuals in our industry 
with the breadth of skills and experience required to develop, market and commercialize drugs successfully. Competition to hire 
from this limited pool is intense, and we may be unable to hire, train, retain or motivate additional key employees on acceptable 
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terms given the competition among numerous pharmaceutical and biotechnology companies, universities and research 
institutions for similarly qualified personnel. 
We rely on consultants and advisors, including scientific and clinical advisors, to assist us in formulating our research and 
development and commercialization strategy. Our consultants and advisors may be employed by other entities and may have 
commitments under consulting or advisory contracts with those entities that may limit their availability to us. If we are unable 
to continue to attract and retain highly qualified personnel, our ability to develop and commercialize emavusertib will be 
limited.
We may in the future seek to acquire complementary businesses and technologies or otherwise seek to expand our 
operations and grow our business, which may divert management resources and adversely affect our financial condition 
and operating results.
We may in the future seek to expand our operations, including through internal growth and/or the acquisition of 
businesses and technologies that we believe are a strategic complement to our business model. We may not be able to identify 
suitable acquisition candidates or expansion strategies and successfully complete such acquisitions or successfully execute any 
such other expansion strategies. We may never realize the anticipated benefits of any efforts to expand our business. 
Furthermore, the expansion of our business, either through internal growth or through acquisitions, poses significant risks to our 
existing operations, financial condition and operating results, including:
•
a diversion of management attention from our existing operations;
•
increased operating complexity of our business, requiring greater personnel and resources;
•
significant additional cash expenditures to expand our operations and acquire and integrate new businesses and 
technologies;
•
unanticipated expenses and potential delays related to integration of the operations, technology and other resources of 
any acquired companies;
•
uncertainty related to the value, benefits or legitimacy of intellectual property or technologies acquired;
•
retaining and assimilating key personnel and the potential impairment of relationships with our employees;
•
incurrence of debt, other liabilities and contingent liabilities, including potentially unknown contingent liabilities; and
•
dilutive stock issuances.
RISKS RELATING TO OUR INTELLECTUAL PROPERTY
We may not be able to obtain and maintain patent protection for our technologies and drugs, our licensors may not be 
able to obtain and maintain patent protection for the technology or drugs that we license from them, and the patent 
protection we or they do obtain may not be sufficient to stop our competitors from using similar technology.
The long-term success of our business depends in significant part on our ability to:
•
obtain patents to protect our technologies and discoveries;
•
protect trade secrets from disclosure to competitors;
•
operate without infringing upon the proprietary rights of others; and
•
prevent others from infringing on our proprietary rights.
The patent positions of pharmaceutical and life science companies, including ours, are generally uncertain and involve 
complex legal, scientific and factual questions. The laws, procedures and standards that the U.S. Patent and Trademark Office 
and various foreign intellectual property offices use to grant and maintain patents, and the standards that courts use to interpret 
patents, are not always applied predictably or uniformly and have changed in significant ways and are expected to continue to 
change. In addition, the laws of foreign countries may not protect our rights to the same extent or in the same manner as the 
laws of the U.S. For example, European patent law restricts the patentability of methods of treatment of the human body more 
than U.S. law does. Consequently, the level of protection, if any, that will be obtained and provided by our patents if we attempt 
to enforce them, and they are challenged, is uncertain.
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Patents may not issue from any of the patent applications that we own or license. If patents do issue, the type and extent 
of patent claims issued to us may not be sufficient to protect our technology from exploitation by our competitors. Our patents 
also may not afford us protection against competitors with similar technology. Assuming the other requirements for 
patentability are met, currently, the first to file a patent application is generally entitled to the patent. Prior to March 16, 2013, in 
the U.S., patent applications were subject to a “first to invent” rule of law. Applications filed on or after March 16, 2013 (with 
the exception of certain applications claiming priority to applications filed prior to March 16, 2013, such as continuations and 
divisionals) are subject to new laws including a “first to file” rule of law. Publications of discoveries in the scientific literature 
often lag behind the actual discoveries, and patent applications in the U.S. and other jurisdictions are typically not published 
until 18 months after filing, or in some cases not at all. Additionally, how the U.S. Patent & Trademark Office and U.S. courts 
will interpret the new laws remains significantly uncertain at this time. We cannot be certain that any existing or future 
application will be subject to the “first to file” or “first to invent” rule of law, that we were the first to make the inventions 
claimed in our existing patents or pending patent applications subject to the prior laws, or that we were the first to file for patent 
protection of such inventions subject to the new laws.
We may not have rights under patents that may cover one or more of our drug candidates. Patents of others may overlap 
with our own patents regarding one or more of our drug candidates. In some cases, these patents may be owned or controlled by 
third party competitors and may prevent or impair our ability to exploit our technology. As a result, we or our current or 
potential future collaborative partners may be required to obtain licenses under third party patents to develop and commercialize 
some of our drug candidates. If we are unable to secure licenses to such patented technology on acceptable terms, we or our 
collaborative partners may not be able to develop and commercialize the affected drug candidate or candidates.
It is also possible that we will fail to identify patentable aspects of our research and development output before it is too 
late to obtain patent protection. Moreover, in some circumstances, we do not have the right to control the preparation, filing and 
prosecution of patent applications, or to maintain the patents, covering technology or drugs that we license from third parties 
and are reliant on our licensors. If we do not control the filing, prosecution of certain patent rights, we cannot be certain that 
these patents and applications will be prosecuted and enforced in a manner consistent with the best interests of our business.
The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our owned and 
licensed patents may be challenged in courts or patent offices in the U.S. and abroad. Such challenges may result in loss of 
exclusivity or in patent claims being narrowed, invalidated or held unenforceable, which could limit our ability to stop others 
from using or commercializing similar or identical technology and drugs, or limit the duration of the patent protection of our 
technology and drugs. Given the amount of time required for the development, testing, and regulatory review of new drug 
candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized. As a 
result, our owned and licensed patent portfolio may not provide us with sufficient rights to exclude others from 
commercializing drugs similar or identical to ours.
We may become involved in expensive and unpredictable patent litigation or other contentious intellectual property 
proceedings, which could result in liability for damages or require us to cease our development and commercialization 
efforts.
There are substantial threats of litigation and other adversarial opposition proceedings regarding patent and other 
intellectual property rights in the pharmaceutical and life science industries. We may become a party to patent litigation or other 
proceedings regarding intellectual property rights.
Situations that may give rise to patent litigation or other disputes over the use of our intellectual property include:
•
initiation of litigation or other proceedings against third parties to enforce our patent rights, to seek to invalidate the 
patents held by third parties or to obtain a judgment that our drug candidates do not infringe such third parties’ 
patents;
•
participation in interference and/or derivation proceedings to determine the priority of invention if our competitors 
file U.S. patent applications that claim technology also claimed by us;
•
initiation of opposition, reexamination, post grant review or inter partes review proceedings by third parties that seek 
to limit or eliminate the scope of our patent protection;
•
initiation of litigation by third parties claiming that our processes or drug candidates or the intended use of our drug 
candidates infringes their patent or other intellectual property rights; and
•
initiation of litigation by us or third parties seeking to enforce contract rights relating to intellectual property that may 
be important to our business.
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Any patent litigation or other proceeding, even if resolved favorably, will likely require us to incur substantial costs and 
be a distraction to management. Some of our competitors may be able to sustain the cost of such litigation or other proceedings 
more effectively than we can because of their substantially greater financial resources. In addition, our collaborators and 
licensors may have rights to file and prosecute claims of infringement of certain of our intellectual property, and we are reliant 
on them. If a patent litigation or other intellectual property proceeding is resolved unfavorably, we or any collaborative partners 
may be enjoined from manufacturing or selling our future drugs without a license from the other party and be held liable for 
significant damages. Moreover, we may not be able to obtain required licenses on commercially acceptable terms or any terms 
at all. In addition, we could be held liable for lost profits if we are found to have infringed a valid patent, or liable for treble 
damages if we are found to have willfully infringed a valid patent. Litigation results are highly unpredictable, and we or any 
collaborative partner may not prevail in any patent litigation or other proceeding in which we may become involved. Any 
changes in, or unexpected interpretations of, the patent laws may adversely affect our ability to enforce our patent position. 
Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could damage our ability to 
compete in the marketplace.
We face risks relating to the enforcement of our intellectual property rights in China and India that could adversely 
affect our business.
We have conducted chemical development work through contract research agreements with contract research 
organizations, or CROs, in China and India. We seek to protect our intellectual property rights under this arrangement through, 
among other things, non-disclosure and assignment of invention covenants. Enforcement of intellectual property rights and 
confidentiality protections in China may not be as effective as in the U.S. or other countries. Policing unauthorized use of 
proprietary technology is difficult and expensive, and we might need to resort to litigation to enforce or defend patents issued to 
us or to determine the enforceability, scope and validity of our proprietary rights or those of others. The experience and 
capabilities of Chinese courts in handling intellectual property litigation vary, and outcomes are unpredictable. Further, such 
litigation may require significant expenditure of cash and management efforts and could harm our business, financial condition 
and results of operations. An adverse determination in any such litigation will impair our intellectual property rights and may 
harm our business, prospects and reputation.
In addition, we collaborate with Aurigene, an Indian company, in the development of new therapeutic compounds. Some 
or all of the intellectual property arising from this collaboration may be developed by Aurigene’s employees, consultants, and 
third party contractors, and we have exercised our option right under the collaboration agreement to obtain exclusive licenses to 
Aurigene’s rights in this intellectual property. Accordingly, our rights depend in part on Aurigene’s contracts with its 
employees and contractors and Aurigene’s ability to protect its trade secrets and other confidential information in India, both 
before and after we exercise our option to obtain exclusive license rights on a program-by-program basis. Enforcement of 
intellectual property rights and confidentiality protections in India may not be as effective as in the U.S. or other countries. 
Policing unauthorized use of proprietary technology is difficult and expensive, and we or Aurigene might need to resort to 
litigation to protect our trade secrets and confidential information. The experience and capabilities of Indian courts in handling 
intellectual property litigation vary, and outcomes are unpredictable. Further, such litigation may require significant expenditure 
of cash and management efforts and could harm our business, financial condition and results of operations. An adverse 
determination in any such litigation would impair our intellectual property rights and may harm our business, prospects and 
reputation.
If we are unable to keep our trade secrets confidential, our technology and proprietary information may be used by 
competitors.
We rely heavily on trade secrets, including unpatented know-how, technology and other proprietary information, to 
maintain our competitive position. We seek to protect this information through confidentiality and intellectual property license 
or assignment provisions in agreements with our employees, consultants and other third party contractors, including our 
contract research agreements with CROs in China and India, as well as through other security measures. Similarly, our 
agreements with Genentech and Aurigene require each collaborator to enter into such agreements with its employees, 
consultants, and other third party contractors. The confidentiality and intellectual property provisions of our agreements and 
security measures may be breached, and we or they may not have adequate remedies for any such breach. In addition, our trade 
secrets may otherwise become known or be independently developed by competitors.
We have agreements under which we license rights to technology from third parties, and we could lose license rights to 
intellectual property that are important to our business under certain circumstances.
We are party to agreements that provide us licenses of intellectual property or sharing of rights to intellectual property 
that is important to our business, and we may enter into additional agreements in the future that provide us licenses to valuable 
technology. These licenses, including our agreement with Aurigene, impose, and future licenses may impose, various 
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commercialization, milestone and other obligations on us, including the obligation to terminate our use of licensed subject 
matter under certain contingencies. If a licensor becomes entitled to, and exercises, termination rights under a license, we would 
lose valuable rights and could lose our ability to develop our drugs. We may need to license other intellectual property to 
commercialize future drugs. Our business may suffer if any current or future licenses terminate, if the licensors fail to abide by 
the terms of the license or fail to prevent infringement by third parties, if the licensed patents or other rights are found to be 
invalid, or if we are unable to enter into necessary licenses on acceptable terms. 
We may be subject to claims that our employees have wrongfully used or disclosed alleged trade secrets of their former 
employers.
As is common in the biotechnology and pharmaceutical industry, we employ individuals who were previously employed 
at other biotechnology or pharmaceutical companies, including our current and potential competitors. Although no claims 
against us are currently pending, we may be subject to claims that such employees, or as a result, we, have inadvertently or 
otherwise used or disclosed trade secrets or other proprietary information of their former employers. 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.
RISKS RELATING TO REGULATORY APPROVAL AND MARKETING OF OUR DRUG CANDIDATES AND 
OTHER LEGAL COMPLIANCE MATTERS
Even if we complete the necessary preclinical studies and clinical trials, the marketing approval process is expensive, 
time consuming and uncertain and may prevent us or any future collaborators from obtaining approvals for the 
commercialization of emavusertib. As a result, we cannot predict when or if, and in which territories, we, or any future 
collaborators, will obtain marketing approval to commercialize emavusertib.
The research, testing, manufacturing, labeling, approval, selling, marketing, promotion and distribution of products are 
subject to extensive regulation by the FDA and comparable foreign regulatory authorities. We, and any future collaborators, are 
not permitted to market emavusertib in the U.S. or in other countries until we, or they, receive approval of an NDA from the 
FDA or marketing approval from applicable regulatory authorities outside the U.S. Emavusertib is in various stages of 
development and is subject to the risks of failure inherent in drug development. We have not submitted an application for or 
received marketing approval for emavusertib in the United States or in any other jurisdiction. We have limited experience in 
conducting and managing the clinical trials necessary to obtain marketing approvals, including FDA approval of an NDA.
The process of obtaining marketing approvals, both in the United States and abroad, is lengthy, expensive and uncertain. 
It may take many years, if approval is obtained at all, and can vary substantially based upon a variety of factors, including the 
type, complexity and novelty of the drug candidates involved. Securing marketing approval requires the submission of 
extensive preclinical and clinical data and supporting information, including manufacturing information, to regulatory 
authorities for each therapeutic indication to establish the drug candidate’s safety and efficacy. The FDA or other regulatory 
authorities may determine that emavusertib is not safe and effective, only moderately effective or has undesirable or unintended 
side effects, toxicities or other characteristics that preclude our obtaining marketing approval or prevent or limit commercial 
use. 
In addition, changes in marketing approval policies during the development period, changes in or the enactment or 
promulgation of additional statutes, regulations or guidance or changes in regulatory review for each submitted product 
application, may cause delays in the approval or rejection of an application. For example, in December 2022, with the passage 
of the Food and Drug Omnibus Reform Act, or FDORA, Congress required sponsors to develop and submit a diversity action 
plan, or DAP, for each Phase 3 clinical trial or any other “pivotal study” of a new drug product. These plans are meant to 
encourage the enrollment of more diverse patient populations in late-stage clinical trials of FDA-regulated products. In June 
2024, as mandated by FDORA, the FDA issued draft guidance outlining the general requirements for DAPs. Unlike most 
guidance documents issued by the FDA, the DAP guidance when finalized will have the force of law because FDORA 
specifically dictates that the form and manner for submission of DAPs are specified in FDA guidance. 
Further, on January 31, 2022, the new Clinical Trials Regulation (EU) No 536/2014 became effective in the European 
Union and replaced the prior Clinical Trials Directive 2001/20/EC. The new regulation aims at simplifying and streamlining the 
authorization, conduct and transparency of clinical trials in the European Union. Under the new coordinated procedure for the 
approval of clinical trials, the sponsor of a clinical trial to be conducted in more than one EU Member State will only be 
required to submit a single application for approval. The submission will be made through the Clinical Trials Information 
System, a new clinical trials portal overseen by the EMA and available to clinical trial sponsors, competent authorities of the 
EU Member States and the public. 
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Moreover, principal investigators for our future clinical trials may serve as scientific advisors or consultants to us and 
receive compensation in connection with such services. Under certain circumstances, we may be required to report some of 
these relationships to the FDA or comparable foreign regulatory authorities. The FDA or a comparable foreign regulatory 
authority may conclude that a financial relationship between us and a principal investigator has created a conflict of interest or 
otherwise affected interpretation of the study. The FDA or comparable foreign regulatory authority may therefore question the 
integrity of the data generated at the applicable clinical trial site and the utility of the clinical trial itself may be jeopardized. 
This could result in a delay in approval, or rejection, of our marketing applications by the FDA or comparable foreign 
regulatory authority, as the case may be, and may ultimately lead to the denial of marketing approval of one or more of our 
product candidates.
Regulatory authorities have substantial discretion in the approval process and varying interpretations of the data obtained 
from preclinical and clinical testing could delay, limit or prevent marketing approval of a drug candidate. The FDA or other 
regulatory authorities may determine that (i) our drug candidate is not safe and effective, only moderately effective or has 
undesirable or unintended side effects, toxicities or other characteristics that preclude our obtaining marketing approval or 
prevent or limit commercial use; (ii) the dose used in a clinical trial has not been optimized and require us to conduct additional 
dose optimization studies; or (iii) the comparator arm in a trial is no longer the appropriate comparator due to the evolution of 
the competitive landscape or subsequent data of the comparator product, even if the FDA or other regulatory authority had 
previously approved the trial design, and we may be required to amend the trial or we may not receive approval of the 
indication. Any marketing approval we, or any future collaborators, ultimately obtain may be limited or subject to restrictions 
or post approval commitments that render the approved product not commercially viable.
Further, the FDA may determine that we must provide additional evidence and data before approving a NDA for our 
candidate products. For example, the FDA reviews an application to determine whether there is “substantial evidence” to 
support a finding of effectiveness for the proposed product for its intended use(s), The FDA has interpreted this evidentiary 
standard to generally require at least two adequate and well-controlled clinical trials to establish effectiveness of a new product. 
Under certain circumstances, however, the FDA has indicated that a single trial with certain characteristics and additional 
confirmatory evidence may satisfy this standard. The FDA issued draft guidance in September 2023 that outlines considerations 
for relying on confirmatory evidence in lieu of a second clinical trial to demonstrate effectiveness. In the event that we submit 
an NDA on the basis of one clinical trial and confirmatory evidence, the FDA could determine that such information is not 
sufficient to support approval of the application and the agency could require us to conduct an additional trial in support of the 
NDA. 
In addition, we could be adversely affected by several significant administrative law cases decided by the U.S. Supreme 
Court in 2024. In Loper Bright Enterprises v. Raimondo, for example, the court overruled Chevron U.S.A., Inc. v. Natural 
Resources Defense Council, Inc., which for 40 years required federal courts to defer to permissible agency interpretations of 
statutes that are silent or ambiguous on a particular topic. The U.S. Supreme Court stripped federal agencies of this presumptive 
deference and held that courts must exercise their independent judgment when deciding whether an agency such as the FDA 
acted within its statutory authority under the Administrative Procedure Act, or the APA. Additionally, in Corner Post, Inc. v. 
Board of Governors of the Federal Reserve System, the court held that actions to challenge a federal regulation under the APA 
can be initiated within six years of the date of injury to the plaintiff, rather than the date the rule is finalized. The decision 
appears to give prospective plaintiffs a personal statute of limitations to challenge longstanding agency regulations. Another 
decision, Securities and Exchange Commission v. Jarkesy, overturned regulatory agencies’ ability to impose civil penalties in 
administrative proceedings. These decisions could introduce additional uncertainty into the regulatory process and may result in 
additional legal challenges to actions taken by federal regulatory agencies, including the FDA and Centers for Medicare & 
Medicaid Services, or CMS, that we rely on. In addition to potential changes to regulations as a result of legal challenges, these 
decisions may result in increased regulatory uncertainty and delays and other impacts, any of which could adversely impact our 
business and operations.
Further, our ability to develop and market new drug products may be impacted by litigation challenging the FDA’s 
approval of another company’s drug product. In April 2023, the U.S. District Court for the Northern District of Texas 
invalidated the approval by the FDA of mifepristone, a drug product which was originally approved in 2000 and whose 
distribution is governed by various measures adopted under a REMS. The Court of Appeals for the Fifth Circuit declined to 
order the removal of mifepristone from the market but did hold that plaintiffs were likely to prevail in their claim that changes 
allowing for expanded access of mifepristone, which the FDA authorized in 2016 and 2021, were arbitrary and capricious. In 
June 2024, the Supreme Court reversed that decision after unanimously finding that the plaintiffs (anti-abortion doctors and 
organizations) did not have standing to bring this legal action against the FDA. On October 11, 2024, the Attorneys General of 
three states (Missouri, Idaho and Kansas) filed an amended complaint in the district court in Texas challenging FDA’s actions. 
On January 16, 2025, the district court agreed to allow these states to file an amended complaint and continue to pursue this 
challenge. Depending on the outcome of this litigation, our ability to develop new drug product candidates and to maintain 
approval of existing drug products could be delayed, undermined or subject to protracted litigation.
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Any delay in obtaining or failure to obtain required approvals could negatively affect our ability or that of any future 
collaborators to generate revenue from emavusertib, which likely would result in significant harm to our financial position and 
adversely impact our stock price.
Failure to obtain marketing approval in foreign jurisdictions would prevent emavusertib from being marketed abroad. 
Any approval we may be granted for emavusertib in the U.S. would not assure approval of emavusertib in foreign 
jurisdictions and if emavusertib is approved for marketing in a foreign jurisdiction, it will be subject to risk associated 
with foreign operations.
In order to market and sell our products in the European Union and other foreign jurisdictions, we, and any future 
collaborators, must obtain separate marketing approvals and comply with numerous and varying regulatory requirements. The 
approval procedure varies among countries and can involve additional testing. The time required to obtain approval may differ 
substantially from that required to obtain FDA approval. The marketing approval process outside the United States generally 
includes all of the risks associated with obtaining FDA approval. In addition, in many countries outside the United States, a 
product must be approved for reimbursement before the product can be approved for sale in that country. We, and any future 
collaborators, may not obtain approvals from regulatory authorities outside the United States on a timely basis, if at all. 
Approval by the FDA does not ensure approval by regulatory authorities in other countries or jurisdictions, and approval by one 
regulatory authority outside the U.S. does not ensure approval by regulatory authorities in other countries or jurisdictions or by 
the FDA. We may file for marketing approvals but not receive the necessary approvals to commercialize our products in any 
market.
In many countries outside the United States, a drug candidate must also be approved for reimbursement before it can be 
sold in that country. In some cases, the price that we intend to charge for our product, if approved, is also subject to approval. 
Obtaining non-U.S. regulatory approvals and compliance with non-U.S. regulatory requirements could result in significant 
delays, difficulties and costs for us and any future collaborators and could delay or prevent the introduction of our drug 
candidate in certain countries. In addition, if we or any future collaborators fail to obtain the non-U.S. approvals required to 
market our drug candidate outside the United States or if we or any future collaborators fail to comply with applicable non-U.S. 
regulatory requirements, our target market will be reduced and our ability to realize the full market potential of our drug 
candidate will be harmed and our business, financial condition, results of operations and prospects may be adversely affected.
Additionally, we could face heightened risks with respect to obtaining marketing authorization in the United Kingdom, or 
UK, as a result of the withdrawal of the UK from the EU, commonly referred to as Brexit. The UK is no longer part of the 
European Single Market and EU Customs Union. As of January 1, 2025, the Medicines and Healthcare Products Regulatory 
Agency, or MHRA, is responsible for approving all medicinal products destined for the UK market (i.e., Great Britain and 
Northern Ireland). At the same time, a new international recognition procedure, or IRP, will apply, which intends to facilitate 
approval of pharmaceutical products in the UK. The IRP is open to applicants that have already received an authorization for 
the same product from one of the MHRA’s specified Reference Regulators, or RRs. The RRs notably include EMA and 
regulators in the EU/European Economic Area, or EEA, member states for approvals in the EU centralized procedure and 
mutual recognition procedure as well as the FDA (for product approvals granted in the U.S.). However, the concrete 
functioning of the IRP is currently unclear. Any delay in obtaining, or an inability to obtain, any marketing approvals may force 
us or our collaborators to restrict or delay efforts to seek regulatory approval in the UK for our product candidates, which could 
significantly and materially harm our business.
In addition, foreign regulatory authorities may change their approval policies and new regulations may be enacted. For 
instance, the EU pharmaceutical legislation is currently undergoing a complete review process, in the context of the 
Pharmaceutical Strategy for Europe initiative, launched by the European Commission in November 2020. The European 
Commission’s proposal for revision of several legislative instruments related to medicinal products, which may reduce the 
duration of regulatory data protection and exclusivity periods for orphan drugs, and revise the eligibility for expedited pathways 
in addition to other changes, was published on April 26, 2023. On April 10, 2024 the European Parliament adopted a position 
on the proposal requesting several amendments to the package. The proposed revisions remain to be agreed and adopted by the 
European Parliament and European Council and the proposals may therefore be 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.
We expect that we will be subject to additional risks in commercializing emavusertib if it receives marketing approval 
outside the United States, including tariffs, trade barriers and regulatory requirements; economic weakness, including inflation, 
or political instability in particular foreign economies and markets; compliance with tax, employment, immigration and labor 
laws for employees living or traveling abroad; foreign currency fluctuations, which could result in increased operating expenses 
and reduced revenue, and other obligations incident to doing business in another country; and workforce uncertainty in 
countries where labor unrest is more common than in the United States.
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We, or any future collaborators, may not be able to obtain orphan drug designation or orphan drug exclusivity for 
emavusertib and, even if we do, that exclusivity may not prevent the FDA or the EMA from approving competing 
products.
Regulatory authorities in some jurisdictions, including the United States and Europe, may designate drugs for relatively 
small patient populations as orphan drugs. Under the Orphan Drug Act, the FDA may designate a drug as an orphan drug if it is 
a product intended to treat a rare disease or condition, which is generally defined as a patient population of fewer than 200,000 
individuals annually in the United States.
Generally, a product with orphan drug designation only becomes entitled to orphan drug exclusivity if it receives the first 
marketing approval for the indication for which it has such designation, in which case the FDA or the EMA will be precluded 
from approving another marketing application for the same product for that indication for the applicable exclusivity period. The 
applicable exclusivity period is seven years in the United States and ten years in Europe. The European exclusivity period can 
be reduced to six years if a product no longer meets the criteria for orphan drug designation or if the product is sufficiently 
profitable so that market exclusivity is no longer justified. 
We or any future collaborators may seek orphan drug designations for emavusertib and may be unable to obtain such 
designations. Even if we do secure such designations and orphan drug exclusivity for a product, that exclusivity may not 
effectively protect the product from competition because different products can be approved for the same condition. Further, the 
FDA can subsequently approve the same drug for the same condition if the FDA concludes that the later product is clinically 
superior in that it is shown to be safer, to be more effective or to make a major contribution to patient care. Finally, orphan drug 
exclusivity may be lost if the FDA or the EMA determines that the request for designation was materially defective or if the 
manufacturer is unable to assure sufficient quantity of the product to meet the needs of patients with the rare disease or 
condition. 
The FDA and Congress may further reevaluate the Orphan Drug Act and its regulations and policies. This may be 
particularly true in light of a September 2021 decision from the Court of Appeals for the 11th Circuit. In Catalyst Pharms, Inc. 
v. Becerra, or Catalyst, held that, for the purpose of determining the scope of orphan drug exclusivity, the term “same disease 
or condition” in the statute means the designated “rare disease or condition” and could not be interpreted by the FDA to mean 
the “indication or use.” Thus, the court concluded, orphan drug exclusivity applies to the entire designated disease or condition 
rather than the approved “indication or use.” Although there have been legislative proposals to overrule this decision, they have 
not been enacted into law. On January 23, 2023, the FDA announced that, in matters beyond the scope of the Catalyst court 
order, the FDA will continue to apply its existing regulations tying orphan-drug exclusivity to the uses or indications for which 
the orphan drug is approved. More recently however, on February 14, 2025, a federal district court in Washington, DC fully 
embraced the reasoning of the Catalyst decision in another decision challenging the scope of orphan drug exclusivity. The 
implications of this decision, and its impact on the FDA’s implementation of the Orphan Drug Act, are unclear at this point. 
We do not know if, when, or how the FDA or Congress may change the orphan drug regulations and policies in the 
future, and it is uncertain how any changes might affect our business. Depending on what changes the FDA may make to its 
orphan drug regulations and policies, our business could be adversely impacted.
In addition, to obtain orphan drug designation in the EU, we would need to demonstrate that there exists no satisfactory 
method of diagnosis, prevention or treatment of the condition in question that has been authorized in the EU or, if such method 
exists, the medicinal product will be of significant benefit to those affected by that condition. There is no assurance that we 
would be able to meet that standard for any of our product candidates. Further, if we do obtain orphan drug designation for a 
candidate product in the EU, we will not be able to maintain that designation if we are not able to show, to the satisfaction of 
the EU regulatory authorities, that the candidate product is of significant benefit to patients over available commercial products 
for the indication in the EU and any additional products that are ahead of our product candidate in clinical development for the 
indication.   
If we, or our collaborators, obtain marketing approval for emavusertib, it will be subject to ongoing regulation and 
could be subject to restrictions or withdrawal from the market, and we may be subject to substantial penalties if we fail 
to comply with regulatory requirements, when and if emavusertib is approved.
If we, or our collaborators, obtain marketing approval for emauvsertib, it will be subject to continual requirements of and 
review by the FDA and other regulatory authorities. These requirements include submissions of safety and other post-marketing 
information and reports, registration and listing requirements, current Good Manufacturing Practices, or similar foreign 
standards, which we refer to as cGMPs, relating to quality control and manufacturing, quality assurance and corresponding 
maintenance of records and documents, and requirements regarding the distribution of samples to physicians and 
recordkeeping. In addition, the approval may be subject to limitations on the indicated uses for which the product may be 
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marketed or to the conditions of approval, or contain requirements for costly post-marketing testing and surveillance to monitor 
the safety or efficacy of the medicine, including the requirement to implement a risk evaluation and mitigation strategy. 
Accordingly, if we receive marketing approval for emavusertib, we will continue to expend time, money and effort in all areas 
of regulatory compliance, including manufacturing, production, product surveillance and quality control. If we fail to comply 
with these requirements, we could have the marketing approvals for our product withdrawn by regulatory authorities and our 
ability to market any products could be limited, which could adversely affect our ability to achieve or sustain profitability. 
If we obtain marketing approval for emavusertib, we and our collaborators must also comply with requirements 
concerning advertising and promotion for emavusertib. Promotional communications with respect to prescription products are 
subject to a variety of legal and regulatory restrictions and must be consistent with the information in the product’s approved 
labeling. Thus, we will not be able to promote emavusertib for indications or uses for which it is not approved. The FDA and 
other agencies, including the Department of Justice, or the DOJ, closely regulate and monitor the post-approval marketing and 
promotion of products to ensure that they are marketed and distributed only for the approved indications and in accordance with 
the provisions of the approved labeling. 
We will also need to carefully navigate the FDA’s various regulations, guidance and policies, along with recently enacted 
legislation, to ensure compliance with restrictions governing promotion of our products. In September 2021, the FDA published 
final regulations which describe the types of evidence that the Agency will consider in determining the intended use of a drug 
or biologic. Moreover, with passage of the Pre-Approval Information Exchange Act in December 2022, sponsors of products 
that have not been approved may proactively communicate to payors certain information about products in development to help 
expedite patient access upon product approval. In addition, in January 2025, the FDA published final guidance outlining its 
policies governing the distribution of scientific information to healthcare providers about unapproved uses of approved 
products. The final guidance calls for such communications to be truthful, non-misleading and scientifically sound and to 
include all information necessary for healthcare providers to interpret the strengths and weaknesses and validity and utility of 
the information about the unapproved use of the approved product. If a company engages in such communications consistent 
with the guidance’s recommendations, the FDA indicated that it will not treat such communications as evidence of unlawful 
promotion of a new intended use for the approved product.
Violations of the Federal Food, Drug, and Cosmetic Act and other statutes, including the False Claims Act, relating to the 
promotion and advertising of prescription products may lead to investigations and enforcement actions alleging violations of 
federal and state health care fraud and abuse laws, as well as state consumer protection laws. 
Failure to comply with regulatory requirements, may yield various results, including: 
•
restrictions on such products, manufacturers or manufacturing processes; 
•
restrictions on the labeling or marketing of a product; 
•
restrictions on distribution or use of a product; 
•
requirements to conduct post-marketing studies or clinical trials; 
•
warning letters or untitled letters; 
•
withdrawal of the products from the market; 
•
refusal to approve pending applications or supplements to approved applications that we submit; 
•
recall of products; 
•
damage to relationships with collaborators; 
•
unfavorable press coverage and damage to our reputation; 
•
fines, restitution or disgorgement of profits or revenues; 
•
suspension or withdrawal of marketing approvals; 
•
refusal to permit the import or export of our products; 
•
product seizure; 
•
injunctions or the imposition of civil or criminal penalties; and 
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•
litigation involving patients using our products.
Non-compliance with EU requirements regarding safety monitoring or pharmacovigilance, and with requirements related 
to the development of products for the pediatric population, can also result in significant financial penalties. Similarly, failure to 
comply with the EU’s requirements regarding the protection of personal information can also lead to significant penalties and 
sanctions. Further, the marketing and promotion of authorized drugs, including industry-sponsored continuing medical 
education and advertising directed toward the prescribers of drugs and/or the general public, are strictly regulated in the EU 
notably under Directive 2001/83EC, as amended, and are also subject to EU Member State laws. Direct-to-consumer 
advertising of prescription medicines is prohibited across the EU. 
Accordingly, assuming we, or our collaborators, receive marketing approval for emavusertib, we, and our collaborators, 
and our and their contract manufacturers will continue to expend time, money and effort in all areas of regulatory compliance, 
including manufacturing, production, product surveillance and quality control. If we, and our collaborators, are not able to 
comply with post-approval regulatory requirements, our or our collaborators’ ability to market any future products could be 
limited, which could adversely affect our ability to achieve or sustain profitability. Further, the cost of compliance with post-
approval regulations may have a negative effect on our operating results and financial condition.
We may seek approval from the FDA or comparable foreign regulatory authorities to use accelerated development 
pathways for our drug product candidates. If we are not able to use such pathways, we may be required to conduct 
additional clinical trials beyond those that are contemplated, which would increase the expense of obtaining, and delay 
the receipt of, necessary marketing approvals, if we receive them at all. In addition, even if an accelerated approval 
pathway is available to us, it may not lead to expedited approval of our drug product candidates, or approval at all. 
Under the Federal Food, Drug and Cosmetic Act, or the FDCA, and implementing regulations, the FDA may grant 
accelerated approval to a product candidate to treat a serious or life-threatening condition that provides meaningful therapeutic 
benefit over available therapies, upon a determination that the product has an effect on a surrogate endpoint or intermediate 
clinical endpoint that is reasonably likely to predict clinical benefit. The FDA considers a clinical benefit to be a positive 
therapeutic effect that is clinically meaningful in the context of a given disease, such as irreversible morbidity or mortality. For 
the purposes of accelerated approval, a surrogate endpoint is a marker, such as a laboratory measurement, radiographic image, 
physical sign, or other measure that is thought to predict clinical benefit, but is not itself a measure of clinical benefit. An 
intermediate clinical endpoint is a clinical endpoint that can be measured earlier than an effect on irreversible morbidity or 
mortality that is reasonably likely to predict an effect on irreversible morbidity or mortality or other clinical benefit 
measurement of a therapeutic effect that is considered reasonably likely to predict the clinical benefit of a drug. The accelerated 
approval pathway may be used in cases in which the advantage of a new drug over available therapy may not be a direct 
therapeutic advantage, but is a clinically important improvement from a patient and public health perspective. 
Prior to seeking such accelerated approval, we will continue to seek feedback from the FDA or comparable foreign 
regulatory agencies and otherwise evaluate our ability to seek and receive such accelerated approval. There can be no assurance 
that the FDA or foreign regulatory agencies will agree with our surrogate endpoints or intermediate clinical endpoints in any of 
our clinical trials, or that we will decide to pursue or submit any additional applications for accelerated approval or any other 
form of expedited development, review or approval. Similarly, there can be no assurance that, after feedback from the FDA or 
comparable foreign regulatory agencies, we will continue to pursue or apply for accelerated approval or any other form of 
expedited development, review or approval. Furthermore, for any submission of an application for accelerated approval or 
application under another expedited regulatory designation, there can be no assurance that such submission or application will 
be accepted for filing or that any expedited development, review or approval will be granted on a timely basis, or at all. 
Finally, there can be no assurance that we will satisfy all FDA requirements, including new provisions that govern 
accelerated approval. For example, with passage of the FDORA in December 2022, Congress modified certain provisions 
governing accelerated approval of drug and biologic products. Specifically, the new legislation authorized the FDA to require a 
sponsor to have its confirmatory clinical trial underway before accelerated approval is awarded and to submit progress reports 
on its post-approval studies to FDA every six months until the study is completed. Moreover, FDORA established expedited 
procedures authorizing FDA to withdraw an accelerated approval if certain conditions are met, including where a required 
confirmatory study fails to verify and describe the predicted clinical benefit or where evidence demonstrates the product is not 
shown to be safe or effective under the conditions of use. The FDA may also use such procedures to withdraw an accelerated 
approval if a sponsor fails to conduct any required post-approval study of the product with due diligence, including with respect 
to “conditions specified by the Secretary.” The new procedures include the provision of due notice and an explanation for a 
proposed withdrawal, and opportunities for a meeting with the Commissioner or the Commissioner’s designee and a written 
appeal, among other things. We will need to fully comply with these and other requirements in connection with the 
development and approval of any product candidate that qualifies for accelerated approval.
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In March 2023, the FDA issued draft guidance that outlines its current thinking and approach to accelerated approval. 
The FDA indicated that the accelerated approval pathway is commonly used for approval of oncology drugs due to the serious 
and life-threatening nature of cancer. Although single-arm trials have been commonly used to support accelerated approval, a 
randomized controlled trial is the preferred approach as it provides a more robust efficacy and safety assessment and allows for 
direct comparisons to an available therapy. To that end, the FDA outlined considerations for designing, conducting, and 
analyzing data for trials intended to support accelerated approvals of oncology therapeutics. Subsequently, in December 2024 
and January 2025, the FDA issued additional draft guidances relating to accelerated approval. These guidances describe FDA’s 
views on what it means to conduct a confirmatory trial with due diligence and how the agency plans to interpret whether such a 
study needs to be underway at the time of approval. While these guidances are currently only in draft form and will ultimately 
not be legally binding even when finalized, sponsors typically observe the FDA’s guidance closely to ensure that their 
investigational products qualify for accelerated approval.
In the EU, a conditional marketing authorization may be granted in cases where all the required safety and efficacy data 
are not yet available. A conditional marketing authorization is subject to conditions to be fulfilled for generating missing data or 
ensuring increased safety measures. A conditional marketing authorization is valid for one year and has to be renewed annually 
until fulfillment of all relevant conditions. Once the applicable pending studies are provided, a conditional marketing 
authorization can become a “standard” marketing authorization. However, if the conditions are not fulfilled within the 
timeframe set by the EMA, the marketing authorization will cease to be renewed.
Accordingly, a failure to obtain and maintain accelerated approval or any other form of expedited development, review or 
approval for our product candidates, or withdrawal of a product candidate, would result in a longer time period until 
commercialization of such product candidate, could increase the cost of development of such product candidate and could harm 
our competitive position in the marketplace. 
We may seek certain designations for emavusertib, including Breakthrough Therapy and Fast Track designations, in 
the U.S., and PRIME Designation in the EU, but we might not receive such designations, and even if we do, such 
designations may not lead to a faster development or regulatory review or approval process.
We may seek certain designations for emavusertib that could expedite review and approval by the FDA. A Breakthrough 
Therapy product is defined as a product that is intended, alone or in combination with one or more other products, to treat a 
serious condition, and preliminary clinical evidence indicates that the product may demonstrate substantial improvement over 
existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical 
development. For drug candidates that have been designated as Breakthrough Therapies, interaction and communication 
between the FDA and the sponsor of the trial can help to identify the most efficient path for clinical development while 
minimizing the number of patients placed in ineffective control regimens. Products designated as Breakthrough Therapies by 
the FDA may also be eligible for priority review if supported by clinical data at the time the NDA is submitted to the FDA.
The FDA may also designate a product for Fast Track review if it is intended, whether alone or in combination with one 
or more other products, for the treatment of a serious or life-threatening disease or condition, and it demonstrates the potential 
to address unmet medical needs for such a disease or condition. For Fast Track products, sponsors may have greater interactions 
with the FDA and the FDA may initiate review of sections of a Fast Track product’s application before the application is 
complete. This rolling review may be available if the FDA determines, after preliminary evaluation of clinical data submitted 
by the sponsor, that a Fast Track product may be effective. The sponsor must also provide, and the FDA must approve, a 
schedule for the submission of the remaining information and the sponsor must pay applicable user fees. 
Designation as a Breakthrough Therapy or Fast Track is within the discretion of the FDA. Accordingly, even if we 
believe that emavusertib meets the criteria for these designations, the FDA may disagree and instead determine not to make 
such designation. Further, even if we receive Breakthrough Therapy or Fast Track designation, the receipt of such designation 
for a drug candidate may not result in a faster development or regulatory review or approval process compared to products 
considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, 
even if emavusertib qualifies for one of these designations, the FDA may later decide that it no longer meets the conditions for 
qualification or decide that the time period for FDA review or approval will not be shortened.
Project Optimus is an initiative of the Oncology Center of Excellence at the FDA. This project focuses on dose 
optimization and dose selection in oncology drug development, and whether the current paradigm based on cytotoxic 
chemotherapeutics leads to doses and schedules of molecularly targeted therapies that provide more toxicity without additional 
efficacy, among other things. There is no assurance, however, that this initiative will lead to early discussions with the FDA or 
expedited studies leading to optimization of dose selection for emavusertib, and could subject us to incur additional costs and 
extend the testing of our drug candidate to further evaluate dose optimization and dose selection, which could further delay our 
ability to obtain regulatory approvals, if at all.
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In the EU, we may seek PRIME designation for emavusertib in the future. PRIME is a voluntary program aimed at 
enhancing the EMA’s role to reinforce scientific and regulatory support in order to optimize development and enable 
accelerated assessment of new medicines that are of major public health interest with the potential to address unmet medical 
needs. The program focuses on medicines that target conditions for which there exists no satisfactory method of treatment in the 
EU or even if such a method exists, it may offer a major therapeutic advantage over existing treatments. PRIME is limited to 
medicines under development and not authorized in the EU and for which the sponsor intends to apply for an initial marketing 
authorization application through the centralized procedure. To be accepted for PRIME, a drug candidate must meet the 
eligibility criteria in respect of its major public health interest and therapeutic innovation based on information that is capable of 
substantiating the claims. The benefits of a PRIME designation include the appointment of a CHMP rapporteur to provide 
continued support and help to build knowledge ahead of a marketing authorization application, early dialogue and scientific 
advice at key development milestones, and the potential to qualify products for accelerated review, meaning reduction in the 
review time for an opinion on approvability to be issued earlier in the application process. PRIME enables a sponsor to request 
parallel EMA scientific advice and health technology assessment advice to facilitate timely market access. Even if we receive 
PRIME designation for emavusertib, the designation may not result in a materially faster development process, review or 
approval compared to conventional EMA procedures. Further, obtaining PRIME designation does not assure or increase the 
likelihood of EMA’s grant of a marketing authorization.
If we are required by the FDA to obtain clearance or approval of a companion diagnostic in connection with approval of 
a candidate therapeutic product, and we do not obtain or there are delays in obtaining FDA clearance or approval of a 
diagnostic device, we will not be able to commercialize the drug candidate and our ability to generate revenue will be 
materially impaired.   
In August 2014, the FDA issued final guidance clarifying the requirements that will apply to approval of therapeutic 
products and in vitro companion diagnostics. According to the guidance, if the FDA determines that a 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 companion diagnostic is not also approved or cleared for 
that indication. Under the Federal Food, Drug, and Cosmetic Act, or FDCA, companion diagnostics are regulated as medical 
devices and the FDA has generally required companion diagnostics intended to select the patients who will respond to cancer 
treatment to obtain premarket approval, or a PMA. Consequently, we anticipate that certain of our companion diagnostics may 
require us or our collaborators to obtain a PMA. 
The PMA process, including the gathering of clinical and preclinical data and the submission to and review by the FDA, 
involves a rigorous premarket review during which the applicant must prepare and provide the FDA with reasonable assurance 
of the device's safety and effectiveness and information about the device and its components regarding, among other things, 
device design, manufacturing and labeling. PMA approval is not guaranteed and may take considerable time, and the FDA may 
ultimately respond to a PMA submission with a not approvable determination based on deficiencies in the application and 
require additional clinical trial or other data that may be expensive and time-consuming to generate and that can substantially 
delay approval. As a result, if we or our collaborators are required by the FDA to obtain approval of a companion diagnostic for 
a candidate therapeutic product, and we or our collaborators do not obtain or there are delays in obtaining FDA approval of a 
diagnostic device, we will not be able to commercialize the drug candidate and our ability to generate revenue will be materially 
impaired. 
It is possible that an in vitro companion diagnostic device could be subject to FDA enforcement discretion from 
compliance with the FDCA if it meets the definition of a Laboratory Developed Test, or LDT. However, FDA issued a final 
rule in April 2024 to end enforcement discretion for LDTs and actively regulate such products as medical devices. Under this 
final rule, LDTs are required to come into compliance with FDA’s medical device regulatory requirements in a staged approach 
over the course of four years. The implementation of this LDT final rule could potentially be affected by the Executive Order, 
Regulatory Freeze Pending Review, issued by President Trump on January 20, 2025 and/or the anticipated change in leadership 
at FDA under the new administration. Further, while the final regulation is set to take effect on May 6, 2025, a number of 
parties have challenged the legality of the LDT regulation in a federal district court. That court held a hearing on this matter on 
February 19, 2025, and is expected to issue a ruling soon.
In its August 2014 guidance, the FDA also indicated that companion diagnostics used to make treatment decisions in 
clinical trials of a therapeutic product generally will be considered investigational devices. When a companion diagnostic is 
used to make critical treatment decisions, such as patient selection, the FDA stated that the diagnostic will be considered a 
significant risk device requiring an investigational device exemption. The FDA may find that a companion diagnostic that we, 
alone or with a third party, plan to develop does not comply with those requirements and, if this were to occur, we would not be 
able to proceed with our planned trial of the applicable drug candidate in these patient populations. 
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Given our limited experience in developing and commercializing diagnostics, we do not plan to develop companion 
diagnostics internally and thus will be dependent on the sustained cooperation and effort of third party collaborators in 
developing and obtaining approval for these companion diagnostics. We may not be able to enter into arrangements with a 
provider to develop a companion diagnostic for use in connection with a registrational trial for our drug candidates or for 
commercialization of our drug candidates, or do so on commercially reasonable terms, which could adversely affect and/or 
delay the development or commercialization of our drug candidates. We and our future collaborators may encounter difficulties 
in developing and obtaining approval for the companion diagnostics, including issues relating to selectivity/specificity, 
analytical validation, reproducibility, or clinical validation. Any delay or failure by our collaborators to develop or obtain 
regulatory approval of the companion diagnostics could delay or prevent approval of our drug candidates. In addition, we, our 
collaborators or third parties may encounter production difficulties that could constrain the supply of the companion 
diagnostics, and both they and we may have difficulties gaining acceptance of the use of the companion diagnostics by 
physicians.  
We believe that adoption of screening and treatment into clinical practice guidelines is important for payer access, 
reimbursement, utilization in medical practice and commercial success, but both our collaborators and we may have difficulty 
gaining acceptance of the companion diagnostic into clinical practice guidelines. If such companion diagnostics fail to gain 
market acceptance, it would have an adverse effect on our ability to derive revenues from sales, if any, of any of our drug 
candidates that are approved for commercial sale. In addition, any companion diagnostic collaborator or third party with whom 
we contract may decide not to commercialize or to discontinue selling or manufacturing the companion diagnostic that we 
anticipate using in connection with development and commercialization of our drug candidate, or our relationship with such 
collaborator or third party may otherwise terminate. We may not be able to enter into arrangements with another provider to 
obtain supplies of an alternative diagnostic test for use in connection with the development and commercialization of our drug 
candidates or do so on commercially reasonable terms, which could adversely affect and/or delay the development or 
commercialization of our drug candidate.
Disruptions at the FDA, the SEC and other government agencies, including from government shutdowns, funding 
shortages, global health concerns, personnel losses, regulatory reform or other disruptions to these agencies’ operations, 
could hinder their ability to hire and retain key leadership and other personnel, prevent new products and services from 
being developed or commercialized in a timely manner or otherwise prevent those agencies from performing normal 
business functions on which the operation of our business may rely, which could negatively impact our business. 
The ability of the FDA to review and approve new products can be affected by a variety of factors, including government 
budget and funding levels, ability to hire and retain key personnel and accept the payment of user fees, and statutory, regulatory 
and policy changes. Average review times at the agency have fluctuated in recent years as a result. Disruptions at the FDA and 
other agencies may also slow the time necessary for new drug candidates to be reviewed and/or approved by necessary 
government agencies, which would adversely affect our business. In addition, government funding of the SEC and other 
government agencies on which our operations may rely, including those that fund research and development activities, is 
subject to the political process, which is inherently fluid and unpredictable. Further, while the FDA’s review of NDAs and other 
applications is funded through the user fee program established under PDUFA, the Trump Administration has indicated that it 
will be reviewing that program and its implementation.
Disruptions at the FDA and other agencies may also slow the time necessary for new drug candidates 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 and the SEC, have had 
to furlough critical FDA, SEC and other government employees and stop critical activities. If a prolonged government 
shutdown occurs, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, 
which could have a material adverse effect on our business. Further, future government shutdowns could impact our ability to 
access the public markets and obtain necessary capital in order to properly capitalize and continue our operations. 
In addition, disruptions may result from events similar to the COVID-19 pandemic. During the COVID-19 pandemic, a 
number of companies announced receipt of complete response letters due to the FDA’s inability to complete required 
inspections for their applications. In the event of a similar public health emergency in the future, the FDA may not be able to 
continue its current pace and review timelines could be extended. Regulatory authorities outside the United States facing similar 
circumstances may adopt similar restrictions or other policy measures in response to a similar public health emergency and may 
also experience delays in their regulatory activities.
There is also substantial uncertainty as to how measures being implemented by the new Trump Administration across the 
government will impact the FDA, CMS and other federal agencies with jurisdiction over our activities. For example, since 
taking office, President Trump has issued a number of executive orders, which could have a significant impact on the manner in 
which the FDA conducts its operations and engages in regulatory and oversight activities. These include E.O. 14192, 
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“Unleashing Prosperity Through Deregulation,” January 31, 2025; E.O. 14212, “Establishing the President’s Make America 
Healthy Again Commission,” February 13, 2025; and E.O. 14219, Ensuring Lawful Governance and Implementing the 
President’s ‘Department of Government Efficiency” Deregulatory Initiative,” February 21, 2025.  
If these or other orders or executive actions impose constraints on FDA’s ability to engage in oversight and 
implementation activities in the normal course, our business may be negatively impacted. In addition, the loss of FDA 
personnel could lead to further disruptions and delays in FDA review and oversight of our product candidates. Similarly, efforts 
by the new administration to substantially reduce or delay research funding by the National Institutes of Health of medical 
research could have substantial direct or indirect impacts on our research activities.  
If a prolonged government shutdown or other disruption occurs, it could significantly impact the ability of the FDA to 
timely review and process our regulatory submissions, which could have a material adverse effect on our business. Future 
shutdowns or other disruptions could also affect other government agencies such as the SEC, which may also impact our 
business by delaying review of our public filings, to the extent such review is necessary, and our ability to access the public 
markets.
If the FDA, EMA or other comparable foreign regulatory authorities approve generic versions of any of our small 
molecule investigational products that receive marketing approval, or such authorities do not grant our products 
appropriate periods of exclusivity before approving generic versions of those products, the sales of our products, if 
approved, could be adversely affected.
Once an NDA is approved, the product covered thereby becomes a “reference listed drug” in the FDA’s publication, 
“Approved Drug Products with Therapeutic Equivalence Evaluations,” commonly known as the Orange Book. Manufacturers 
may seek approval of generic versions of reference listed drugs through submission of abbreviated new drug applications, or 
ANDAs, in the United States. In support of an ANDA, a generic manufacturer need not conduct clinical trials to assess safety 
and efficacy. Rather, the sponsor generally must show that its product has the same active ingredient(s), dosage form, strength, 
route of administration and conditions of use or labelling as the reference listed drug and that the generic version is 
bioequivalent to the reference listed drug, meaning it is absorbed in the body at the same rate and to the same extent. Generic 
products may be significantly less costly to bring to market than the reference listed drug and companies that produce generic 
products are generally able to offer them at lower prices. Thus, following the introduction of a generic drug, a significant 
percentage of the sales of any branded product or reference listed drug is typically lost to the generic product.
The FDA may not approve an ANDA for a generic product until any applicable period of regulatory exclusivity for the 
reference listed drug has expired. The FDCA provides a period of five years of regulatory exclusivity for a new drug containing 
a new chemical entity. Specifically, in cases where such exclusivity has been granted, an ANDA may not be submitted to the 
FDA until the expiration of five years unless the submission is accompanied by a Paragraph IV certification that a patent 
covering the reference listed drug is either invalid or will not be infringed by the generic product, in which case the sponsor 
may submit its application four years following approval of the reference listed drug.
Generic drug manufacturers may seek to launch generic products following the expiration of any applicable regulatory 
exclusivity period we obtain if our products are approved, even if we still have patent protection for such products. Competition 
that our product could face from generic versions of our product could materially and adversely affect our future revenue, 
profitability, and cash flows and substantially limit our ability to obtain a return on the investments we have made in the drug 
candidate.
Current and future legislation may increase the difficulty and cost for us and any future collaborators to obtain 
reimbursement for any drug candidate that does receive marketing approval and our ability to generate revenue will be 
materially impaired.
In the United States and foreign jurisdictions, there have been a number of legislative and regulatory changes and 
proposed changes regarding the healthcare system that could prevent or delay marketing approval of our drug candidates, 
restrict or regulate post-approval activities and affect our ability to profitably sell any drug candidates for which we obtain 
marketing approval. We expect that current laws, as well as other healthcare reform measures that may be adopted in the future, 
may result in more rigorous coverage criteria and in additional downward pressure on the price that we, or any collaborators, 
may receive for any approved products.
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In March 2010, President Obama signed into law the Patient Protection and Affordable Care Act, or PPACA, as amended 
by the Health Care and Education Affordability Reconciliation Act, or collectively the ACA. In addition, other legislative 
changes have been proposed and adopted since the ACA was enacted. In August 2011, the Budget Control Act of 2011, among 
other things, created measures for spending reductions by Congress. A Joint Select Committee on Deficit Reduction, tasked 
with recommending a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, was unable to reach 
required goals, thereby triggering the legislation’s automatic reduction to several government programs. These changes 
included aggregate reductions to Medicare payments to providers of up to 2% per fiscal year, which went into effect in April 
2013 and will remain in effect through 2031 under the CARES Act. The American Taxpayer Relief Act of 2012, among other 
things, reduced Medicare payments to several providers and increased the statute of limitations period for the government to 
recover overpayments to providers from three to five years. Further, with the passage of the Inflation Reduction Act, or the 
IRA, in August 2022, Congress extended the expansion of PPACA premium tax credits through 2025.
These and other laws may result in additional reductions in Medicare and other healthcare funding and otherwise affect 
the prices we may obtain for any of our products or drug candidates for which we may obtain regulatory approval or the 
frequency with which any such product is prescribed or used. For example, the Consolidated Appropriations Act, which was 
signed into law by President Biden in December 2022, made several changes to sequestration of the Medicare program. Section 
1001 of the Act delays the 4% Statutory Pay-As-You-Go Act of 2010 (PAYGO) sequester for two years, through the end of 
calendar year 2024. Triggered by enactment of the American Rescue Plan Act of 2021, the 4% cut to the Medicare program 
would have taken effect in January 2023. The Act’s health care offset title includes Section 4163, which extends the 2% Budget 
Control Act of 2011 Medicare sequester for six months into fiscal year 2032 and lowers the payment reduction percentages in 
fiscal years 2030 and 2031.
Since enactment of the ACA, there have been, and continue to be, numerous legal challenges and Congressional actions 
to repeal and replace provisions of the law. For example, with enactment of the Tax Cuts and Jobs Act of 2017, which was 
signed by President Trump on December 22, 2017, Congress repealed the “individual mandate.” The repeal of this provision, 
which requires most Americans to carry a minimal level of health insurance, became effective in 2019 Further, on June 17, 
2021, the U.S. Supreme Court dismissed an action challenging the PPACA after finding that the plaintiffs did not have standing 
to challenge the constitutionality of the law. Litigation and legislation over the PPACA are likely to continue, with 
unpredictable and uncertain results. 
During the first Trump Administration, the Congress and administration sought to overturn the ACA and related 
measures. Shortly after taking office in January 2025, President Trump revoked numerous executive orders issued by President 
Biden, including at least two executive orders (e.g., EO 14009, Strengthening Medicaid and the Affordable Care Act, and EO 
14070, Continuing to Strengthen Americans’ Access to Affordable, Quality Health Coverage) where were designed to further 
implement the ACA. We anticipate similar efforts to change the ACA, and the accompanying uncertainty, for the foreseeable 
future. 
We expect that these healthcare reforms, as well as other healthcare reform measures that may be adopted in the future, 
may result in additional reductions in Medicare and other healthcare funding, more rigorous coverage criteria, new payment 
methodologies and additional downward pressure on the price that we receive for any approved product and/or the level of 
reimbursement physicians receive for administering any approved product we might bring to market. Reductions in 
reimbursement levels may negatively impact the prices we receive or the frequency with which our products are prescribed or 
administered. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction 
in payments from private payors. Accordingly, such reforms, if enacted, could have an adverse effect on anticipated revenue 
from a drug candidate that we may successfully develop and for which we may obtain marketing approval and may affect our 
overall financial condition and ability to develop or commercialize the drug candidate.
The prices of prescription pharmaceuticals in the United States and foreign jurisdictions are subject to considerable 
legislative and executive actions and could impact the prices we obtain for our products, if and when licensed.
The prices of prescription pharmaceuticals have been the subject of considerable discussion in the United States. There 
have been U.S. Congressional inquiries, as well as proposed and enacted state and federal legislation designed to, among other 
things, bring more transparency to pharmaceutical pricing, review the relationship between pricing and manufacturer patient 
programs, and reduce the costs of pharmaceuticals under Medicare and Medicaid.
In addition, in October 2020, HHS and the FDA published a final rule allowing states and other entities to develop a 
Section 804 Importation Program, or SIP, to import certain prescription drugs from Canada into the United States. That 
regulation was challenged in a lawsuit by the Pharmaceutical Research and Manufacturers of America, or PhRMA, but the case 
was dismissed by a federal district court in February 2023 after the court found that PhRMA did not have standing to sue HHS. 
Seven states have passed laws allowing for the importation of drugs from Canada. Two states have passed legislation 
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establishing workgroups to examine the impact of a state importation program. As of May 2024, five states had submitted 
Section 804 Importation Program proposals to the FDA and, on January 5, 2024, the FDA approved Florida’s plan for Canadian 
drug importation. That state now has authority to import certain drugs from Canada for a period of two years once certain 
conditions are met. Florida will first need to submit a pre-import request for each drug selected for importation, which must be 
approved by the FDA. The state will also need to relabel the drugs and perform quality testing of the products to meet FDA 
standards.
Further, on November 20, 2020, HHS finalized a regulation removing safe harbor protection for price reductions from 
pharmaceutical manufacturers to plan sponsors under Part D, either directly or through pharmacy benefit managers, unless the 
price reduction is required by law. The final rule would also eliminate the current safe harbor for Medicare drug rebates and 
create new safe harbors for beneficiary point-of-sale discounts and pharmacy benefit manager service fees. It was originally set 
to go into effect on January 1, 2022, but with passage of the IRA has been delayed by Congress to January 1, 2032.
On August 16, 2022, the Inflation Reduction Act of 2022, or IRA, was signed into law by President Biden. The new 
legislation has implications for Medicare Part D, which is a program available to individuals who are entitled to Medicare Part 
A or enrolled in Medicare Part B to give them the option of paying a monthly premium for outpatient prescription drug 
coverage. Among other things, the IRA requires manufacturers of certain drugs to engage in price negotiations with Medicare 
(beginning in 2026), with prices that can be negotiated subject to a cap and it replaces the Part D coverage gap discount 
program with a new discounting program (beginning in 2025). In addition, the IRA established inflation rebate programs under 
Medicare Part B and Part D. These programs require manufacturers to pay rebates to Medicare if they raise their prices for 
certain Part B and Part D drugs faster than the rate of inflation. On December 9, 2024, with issuance of its 2025 Physician Fee 
Schedule final regulation, CMS finalized its rules governing the IRA inflation rebate programs. The IRA permits the Secretary 
of HHS to implement many of these provisions through guidance, as opposed to regulation, for the initial years.
Specifically, with respect to price negotiations, Congress authorized Medicare to negotiate lower prices for certain costly 
single-source drug products that do not have competing generics or biosimilars and are reimbursed under Medicare Part B and 
Part D. CMS may negotiate prices for ten high-cost drugs paid for by Medicare Part D starting in 2026, followed by 15 Part D 
drugs in 2027, 15 Part B or Part D drugs in 2028, and 20 Part B or Part D drugs in 2029 and beyond. This provision applies to 
drug products that have been approved for at least 9 years. Nonetheless, since CMS may establish a maximum price for these 
products in price negotiations, we would be fully at risk of government action if our products are the subject of Medicare price 
negotiations. Moreover, given the risk that could be the case, these provisions of the IRA may also further heighten the risk that 
we would not be able to achieve the expected return on our drug products or full value of our patents protecting our products if 
prices are set after such products have been on the market for nine years.
The first cycle of negotiations for the Medicare Drug Price Negotiation Program commenced in the summer of 2023. On 
August 15, 2024, the HHS published the results of the first Medicare drug price negotiations for ten selected drugs that treat a 
range of conditions, including diabetes, chronic kidney disease, and rheumatoid arthritis. The prices of these ten drugs will 
become effective January 1, 2026. On January 17, 2025, CMS announced its selection of 15 additional drugs covered by Part D 
for the second cycle of negotiations. Thereafter, following the change in administrations, CMS issued a public statement on 
January 29, 2025, declaring that lowering the cost of prescription drugs is a top priority of the new administration and CMS is 
committed to considering opportunities to bring greater transparency in the negotiation program. The second cycle of 
negotiations with participating drug companies will occur during 2025, and any negotiated prices for this second set of drugs 
will be effective starting January 1, 2027.
In addition, we will need to carefully navigate the IRA and its provisions governing orphan drugs. Specifically, the IRA 
includes a provision, known as the orphan drug exclusion, that excludes from price negotiations those orphan drugs that have 
been designated for only one rare disease or condition and for which the only approved indication (or indications) is for such 
disease or condition. Thus, as CMS stated in final guidance in July 2023, a drug or biologic that is designated for more than one 
rare disease or condition will not qualify for the orphan drug exclusion, even if the drug or biologic is not approved for any 
indications for the additional diseases or conditions. While there is Congressional support for expanding the orphan drug 
exclusion to include orphan drugs with more than one approved indication, no legislation has been enacted. Accordingly, if one 
of our product candidates is designated and approved as an orphan drug for one disease or condition, and we subsequently 
receive approval of that product for a different disease or condition, the product will no longer be excluded from the IRA price 
negotiation provision under the orphan drug exclusion and that could impact our revenues and business.
Further, the legislation subjects drug manufacturers to civil monetary penalties and a potential excise tax for failing to 
comply with the legislation by offering a price that is not equal to or less than the negotiated “maximum fair price” under the 
law or for taking price increases that exceed inflation. The legislation also requires manufacturers to pay rebates for drugs in 
Medicare Part D whose price increases exceed inflation. The new law also caps Medicare out-of-pocket drug costs at an 
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estimated $4,000 a year in 2024 and, thereafter beginning in 2025, at $2,000 a year. In addition, the IRA potentially raises legal 
risks with respect to individuals participating in a Medicare Part D prescription drug plan who may experience a gap in 
coverage if they required coverage above their initial annual coverage limit before they reached the higher threshold, or 
“catastrophic period” of the plan. Individuals requiring services exceeding the initial annual coverage limit and below the 
catastrophic period, must pay 100% of the cost of their prescriptions until they reach the catastrophic period. Among other 
things, the IRA contains many provisions aimed at reducing this financial burden on individuals by reducing the co-insurance 
and co-payment costs, expanding eligibility for lower income subsidy plans, and price caps on annual out-of-pocket expenses, 
each of which could have potential pricing and reporting implications.
On June 6, 2023, Merck & Co. filed a lawsuit against the HHS and CMS asserting that, among other things, the IRA’s 
Drug Price Negotiation Program for Medicare constitutes an uncompensated taking in violation of the Fifth Amendment of the 
Constitution. Subsequently, a number of other parties, including the U.S. Chamber of Commerce, Bristol Myers Squibb 
Company, PhRMA, Astellas, Novo Nordisk, Janssen Pharmaceuticals, Novartis, AstraZeneca and Boehringer Ingelheim, also 
filed lawsuits in various courts with similar constitutional claims against the HHS and CMS. HHS has generally won the 
substantive disputes in these cases, and various federal district court judges have expressed skepticism regarding the merits of 
the legal arguments being pursued by the pharmaceutical industry. Certain of these cases are now on appeal and, on October 30, 
2024, the Court of Appeals for the Third Circuit heard oral argument in three of these cases. We expect that litigation involving 
these and other provisions of the IRA will continue, with unpredictable and uncertain results. Accordingly, while it is currently 
unclear how the IRA will be effectuated, we cannot predict with certainty what impact any federal or state health reforms will 
have on us, but such changes could impose new or more stringent regulatory requirements on our activities or result in reduced 
reimbursement for our products, any of which could adversely affect our business, results of operations and financial condition.
At the state level, individual states are increasingly aggressive in passing legislation and implementing regulations 
designed to control pharmaceutical product pricing, including price or patient reimbursement constraints, discounts, restrictions 
on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage 
importation from other countries and bulk purchasing. In addition, regional healthcare organizations and individual hospitals 
are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in 
their prescription drug and other healthcare programs. These measures could reduce the ultimate demand for our products, once 
approved, or put pressure on our product pricing. We expect that additional state and federal healthcare reform measures will be 
adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products 
and services, which could result in reduced demand for our drug candidates or additional pricing pressures. This may be 
increasingly true with respect to products approved pursuant to the accelerated approval pathway. State Medicaid programs and 
other payers are developing strategies and implementing significant coverage barriers, or refusing to cover these products 
outright, arguing that accelerated approval drugs have insufficient or limited evidence despite meeting the FDA’s standards for 
accelerated approval.
In the European Union, similar political, economic and regulatory developments may affect our ability to profitably 
commercialize our drug candidates, if approved. In markets outside of the United States and the European Union, 
reimbursement and healthcare payment systems vary significantly by country, and many countries have instituted price ceilings 
on specific products and therapies. In many countries, including those of the European Union, the pricing of prescription 
pharmaceuticals is subject to governmental control and access. 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 or our collaborators may be required to conduct a clinical trial that compares the cost-
effectiveness of our product to other available therapies. If reimbursement of our product is unavailable or limited in scope or 
amount, or if pricing is set at unsatisfactory levels, our business could be materially harmed.
We may be subject to certain healthcare laws and regulations, which could expose us to criminal sanctions, civil 
penalties, contractual damages, reputational harm, fines, disgorgement, exclusion from participation in government 
healthcare programs, curtailment or restricting of our operations, and diminished profits and future earnings.
Healthcare providers, third party payors and others will play a primary role in the recommendation and prescription of 
any product for which we obtain marketing approval. Our future arrangements with healthcare providers and third party payors 
will expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may constrain the business 
or financial arrangements and relationships through which we market, sell and distribute any product for which we obtain 
marketing approval. Potentially applicable U.S. federal and state healthcare laws and regulations include the following:
Anti-Kickback Statute. The federal Anti-Kickback Statute prohibits, among other things, persons and entities from 
knowingly and willfully soliciting, offering, receiving or providing remuneration, directly or indirectly, in cash or in kind, to 
induce or reward either the referral of an individual for, or the purchase, order or recommendation of, any good or service, for 
which payment may be made under federal healthcare programs such as Medicare and Medicaid;
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False Claims Laws. The federal false claims laws, including the civil False Claims Act, impose criminal and civil 
penalties, including those from civil whistleblower or qui tam actions against individuals or entities for knowingly presenting, 
or causing to be presented to the federal government claims for payment that are false or fraudulent or making a false statement 
to avoid, decrease or conceal an obligation to pay money to the federal government;
HIPAA. The federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, imposes criminal and civil 
liability for executing or attempting to execute a scheme to defraud any healthcare benefit program;
False Statements Statute. The federal false statements statute prohibits knowingly and willfully falsifying, concealing or 
covering up a material fact or making any materially false statement in connection with the delivery of or payment for 
healthcare benefits, items or services;
Transparency Requirements. The federal Physician Payments Sunshine Act requires certain manufacturers of drugs for 
which payment is available under Medicare, Medicaid, or the Children’s Health Insurance Program, with specific exceptions, to 
report annually to the HHS information related to healthcare provider payments and other transfers of value and healthcare 
provider ownership and investment interests; and
Analogous State and Foreign Laws. Analogous state laws and regulations, such as state anti-kickback and false claims 
laws, and transparency laws, may apply to sales or marketing arrangements, and claims involving healthcare items or services 
reimbursed by non-governmental third party payors, including private insurers, and some state laws require pharmaceutical 
companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance 
promulgated by the federal government, in addition to requiring drug manufacturers to report information related to payments 
to physicians and other healthcare providers or marketing expenditures. 
Efforts to ensure that our business arrangements with third parties, and our business generally, will comply with 
applicable healthcare laws and regulations will involve substantial costs. It is possible that governmental authorities will 
conclude that our business practices may not comply with current or future statutes, regulations or case law involving 
applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of 
these laws or any other governmental regulations that may apply to us, we may be subject to significant civil, criminal and 
administrative penalties, damages, fines, imprisonment, exclusion of products from government funded healthcare programs, 
such as Medicare and Medicaid, disgorgement, contractual damages, and reputational harm, any of which could substantially 
disrupt our operations. If any of the physicians or other providers or entities with whom we expect to do business is found not to 
be in compliance with applicable laws, they may be subject to criminal, civil or administrative sanctions, including exclusions 
from government funded healthcare programs.
We are subject to stringent privacy laws, information security laws, regulations, policies, and contractual obligations 
and failure to comply with such requirements could subject us to significant fines and penalties, which may have a 
material adverse effect on our business, financial condition or results of operations.
We are subject to data privacy and protection laws and regulations that apply to the collection, transmission, storage and 
use of personally-identifying information, which among other things, impose certain requirements relating to the privacy, 
security and transmission of personal information, including comprehensive regulatory systems in the U.S., EU and United 
Kingdom. The legislative and regulatory landscape for privacy and data protection continues to evolve in jurisdictions 
worldwide, and there has been an increasing focus on privacy and data protection issues with the potential to affect our 
business. Failure to comply with any of these laws and regulations could result in enforcement action against us, including 
fines, claims for damages by affected individuals, damage to our reputation and loss of goodwill, any of which could have a 
material adverse effect on our business, financial condition, results of operations or prospects.
There are numerous U.S. federal and state laws and regulations related to the privacy and security of personal information. 
In particular, regulations promulgated pursuant to HIPAA establish privacy and security standards that limit the use and 
disclosure of individually identifiable health information, or protected health information, and require the implementation of 
administrative, physical and technological safeguards to protect the privacy of protected health information and ensure the 
confidentiality, integrity and availability of electronic protected health information. Determining whether protected health 
information has been handled in compliance with applicable privacy standards and our contractual obligations can be complex 
and may be subject to changing interpretation. These obligations may be applicable to some or all of our business activities now 
or in the future.
If we are unable to properly protect the privacy and security of protected health information, we could be found to have 
breached our contracts. Further, if we fail to comply with applicable privacy laws, including applicable HIPAA privacy and 
security standards, we could face civil and criminal penalties. HHS enforcement activity can result in financial liability and 
reputational harm, and responses to such enforcement activity can consume significant internal resources. In addition, state 
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attorneys general are authorized to bring civil actions seeking either injunctions or damages in response to violations that 
threaten the privacy of state residents. We cannot be sure how these regulations will be interpreted, enforced or applied to our 
operations. In addition to the risks associated with enforcement activities and potential contractual liabilities, our ongoing 
efforts to comply with evolving laws and regulations at the federal and state level may be costly and require ongoing 
modifications to our policies, procedures and systems. 
In addition to federal privacy requirements there also are state law requirements that may impact our business operations. 
In 2018, California passed into law the California Consumer Privacy Act, or the CCPA, which took effect on January 1, 2020, 
and imposed many requirements on businesses that process the personal information of California residents. Many of the 
CCPA’s requirements are similar to those found in the General Data Protection Regulation, or the GDPR, including requiring 
businesses to provide notice to data subjects regarding the information collected about them and how such information is used 
and shared, and providing data subjects the right to request access to such personal information and, in certain cases, request the 
erasure of such personal information. The CCPA also affords California residents the right to opt out of “sales” of their personal 
information. The CCPA contains significant penalties for companies that violate its requirements. 
In November 2020, California voters passed a ballot initiative for the California Privacy Rights Act, or the CPRA, which 
went into effect on January 1, 2023, and significantly expand the CCPA to incorporate additional GDPR-like provisions 
including requiring that the use, retention and sharing of personal information of California residents be reasonably necessary 
and proportionate to the purposes of collection or processing, granting additional protections for sensitive personal information, 
and requiring greater disclosures related to notice to residents regarding retention of information. The CPRA also created a new 
enforcement agency – the California Privacy Protection Agency – whose sole responsibility is to enforce the CPRA, which will 
further increase compliance risk. The provisions in the CPRA may apply to some of our business activities. 
In addition to California, at least 18 other states have passed comprehensive privacy laws similar to the CCPA and CPRA. 
These laws are either in effect or will go into effect sometime before the end of 2026. Like the CCPA and CPRA, these laws 
create obligations related to the processing of personal information, as well as special obligations for the processing of 
“sensitive” data (which includes health data in some cases). Some of the provisions of these laws may apply to our business 
activities. There are also states that are considering or have already passed comprehensive privacy laws during the 2023 
legislative sessions that will go into effect in 2024 and beyond. There are also states that are specifically regulating health 
information that may affect our business. For example, Washington state recently passed a health privacy law that will regulate 
the collection and sharing of health information, and the law also has a private right of action, which further increases the 
relevant compliance risk. These laws may impact our business activities, including our identification of research subjects, 
relationships with business partners and ultimately the marketing and distribution of our products.
Plaintiffs’ lawyers are also increasingly using privacy-related statutes at both the state and federal level to bring lawsuits 
against companies for their data-related practices. In particular, there have been a significant number of cases filed against 
companies for their use of pixels and other web trackers. These cases often allege violations of the California Invasion of 
Privacy Act and other state laws regulating wiretapping, as well as the federal Video Privacy Protection Act. The rise in these 
types of lawsuits creates potential risk for our business. 
Similar to the laws in the U.S., there are significant privacy and data security laws that apply in Europe and other 
countries. The collection, use, disclosure, transfer, or other processing of personal data, including personal health data, 
regarding individuals who are located in the European Economic Area, or the EEA, and the processing of personal data that 
takes place in the EEA, is regulated by the GDPR, which went into effect in May 2018 and which imposes obligations on 
companies that operate in our industry with respect to the processing of personal data and the cross-border transfer of such data. 
The GDPR imposes onerous accountability obligations requiring data controllers and processors to maintain a record of their 
data processing and policies. If our or our partners’ or service providers’ privacy or data security measures fail to comply with 
the GDPR requirements, we may be subject to litigation, regulatory investigations, enforcement notices requiring us to change 
the way we use personal data and/or fines of up to 20 million Euros or up to 4% of the total worldwide annual turnover of the 
group of companies of the preceding financial year, whichever is higher, as well as compensation claims by affected 
individuals, negative publicity, reputational harm and a potential loss of business and goodwill.
The GDPR places restrictions on the cross-border transfer of personal data from the EU to countries that have not been 
found by the EC to offer adequate data protection legislation. There are ongoing concerns about the ability of companies to 
transfer personal data from the EU to other countries. In July 2020, the Court of Justice of the EU, or the CJEU, invalidated the 
EU-U.S. Privacy Shield, one of the mechanisms used to legitimize the transfer of personal data from the EEA to the U.S. The 
CJEU decision also drew into question the long-term viability of an alternative means of data transfer, the standard contractual 
clauses, for international transfers of personal data from the EEA. This CJEU decision resulted in increased scrutiny on data 
transfers and increased our costs of compliance with data privacy legislation as well as our costs of negotiating appropriate 
privacy and security agreements with our vendors and business partners.
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In October 2022, President Biden signed an executive order to implement the EU-U.S. Data Privacy Framework, which 
serves as a replacement to the EU-U.S. Privacy Shield. The EC adopted the adequacy decision on July 10, 2023. The adequacy 
decision permits U.S. companies who self-certify to the EU-U.S. Data Privacy Framework to rely on it as a valid data transfer 
mechanism for data transfers from the EU to the U.S. However, some privacy advocacy groups have already suggested that 
they will be challenging the EU-U.S. Data Privacy Framework. If these challenges are successful, they may not only impact the 
EU-U.S. Data Privacy Framework, but also further limit the viability of the standard contractual clauses and other data transfer 
mechanisms. The uncertainty around this issue has the potential to impact our business. Following the withdrawal of the UK 
from the EU, the UK Data Protection Act 2018 applies to the processing of personal data that takes place in the UK and 
includes parallel obligations to those set forth by GDPR. In relation to data transfers, both the UK and the EU have determined, 
through separate “adequacy” decisions, that data transfers between the two jurisdictions are in compliance with the UK Data 
Protection Act and the GDPR, respectively. The UK and the U.S. have also agreed to a U.S.-UK “Data Bridge”, which 
functions similarly to the EU-U.S. Data Privacy Framework and provides an additional legal mechanism for companies to 
transfer data from the UK to the U.S. In addition to the UK, Switzerland is also in the process of approving an adequacy 
decision in relation to the Swiss-U.S. Data Privacy Framework (which would function similarly to the EU-U.S. Data Privacy 
Framework and the U.S.-UK Data Bridge in relation to data transfers from Switzerland to the U.S.). Any changes or updates to 
these developments have the potential to impact our business.
Beyond GDPR, there are privacy and data security laws in a growing number of countries around the world. While many 
loosely follow GDPR as a model, other laws contain different or conflicting provisions. These laws will impact our ability to 
conduct our business activities, including both our clinical trials and the sale and distribution of commercial products, through 
increased compliance costs, costs associated with contracting and potential enforcement actions.
While we continue to address the implications of the recent changes to data privacy regulations, data privacy remains an 
evolving landscape at both the domestic and international level, with new regulations coming into effect and continued legal 
challenges, and our efforts to comply with the evolving data protection rules may be unsuccessful. It is possible that these laws 
may be interpreted and applied in a manner that is inconsistent with our practices. We must devote significant resources to 
understanding and complying with this changing landscape. Failure to comply with laws regarding data protection would 
expose us to risk of enforcement actions taken by data protection authorities in the EEA and elsewhere and carries with it the 
potential for significant penalties if we are found to be non-compliant. Similarly, failure to comply with federal and state laws 
in the U.S. regarding privacy and security of personal information could expose us to penalties under such laws. Any such 
failure to comply with data protection and privacy laws could result in government-imposed fines or orders requiring that we 
change our practices, claims for damages or other liabilities, regulatory investigations and enforcement action, litigation and 
significant costs for remediation, any of which could adversely affect our business. Even if we are not determined to have 
violated these laws, government investigations into these issues typically require the expenditure of significant resources and 
generate negative publicity, which could harm our business, financial condition, results of operations or prospects.
Accordingly, any breach of privacy laws or data security laws, particularly any breach resulting in a significant security 
incident or breach involving the misappropriation, loss or other unauthorized use or disclosure of sensitive or confidential 
patient or consumer information, could have a material adverse effect on our business, reputation and financial condition. As a 
data controller, we will be accountable for any third-party service providers we engage to process personal data on our behalf, 
including our CROs. There is no assurance that privacy and security-related safeguards we implement will protect us from all 
risks associated with the third-party processing, storage and transmission of such information. In certain situations, both in the 
United States and in other countries, we also may be obligated as a result of a security breach to notify individuals and/or 
government entities about these breaches. 
Given the breadth and depth of changes in data protection obligations, preparing for and complying with such 
requirements is rigorous and time intensive and requires significant resources and a review of our technologies, systems and 
practices, as well as those of any third party collaborators, service providers, contractors or consultants that process or transfer 
personal data collected in the European Union. The GDPR and other changes in laws or regulations associated with the 
enhanced protection of certain types of sensitive data, such as healthcare data or other personal information from our clinical 
trials, could require us to change our business practices and put in place additional compliance mechanisms, may interrupt or 
delay our development, regulatory and commercialization activities and increase our cost of doing business, and could lead to 
government enforcement actions, private litigation and significant fines and penalties against us and could have a material 
adverse effect on our business, financial condition or results of operations. 
We are subject to U.S. and foreign anti-corruption and anti-money laundering laws with respect to our operations and 
non-compliance with such laws can subject us to criminal and/or civil liability and harm our business.
We are subject to the U.S. Foreign Corrupt Practices Act of 1977, as amended, or the FCPA, the U.S. domestic bribery 
statute contained in 18 U.S.C. § 201, the U.S. Travel Act, the USA PATRIOT Act, and other state and national anti-bribery and 
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anti-money laundering laws in countries in which we conduct activities. Anti-corruption laws are interpreted broadly and 
prohibit companies and their employees, agents, third party intermediaries, joint venture partners and collaborators from 
authorizing, promising, offering, or providing, directly or indirectly, improper payments or benefits to recipients in the public or 
private sector. We may have direct or indirect interactions with officials and employees of government agencies or government-
affiliated hospitals, universities, and other organizations. In addition, we may engage third party intermediaries to promote our 
clinical research activities abroad and/or to obtain necessary permits, licenses, and other regulatory approvals. We can be held 
liable for the corrupt or other illegal activities of these third party intermediaries, our employees, representatives, contractors, 
partners, and agents, even if we do not explicitly authorize or have actual knowledge of such activities.
We have adopted a code of business conduct and ethics that mandates compliance with the FCPA and other anti-
corruption laws applicable to our business throughout the world. We cannot assure you, however, that our employees and third 
party intermediaries will comply with this code or such anti-corruption laws. Noncompliance with anti-corruption and anti-
money laundering laws could subject us to whistleblower complaints, investigations, sanctions, settlements, prosecution, other 
enforcement actions, disgorgement of profits, significant fines, damages, other civil and criminal penalties or injunctions, 
suspension and/or debarment from contracting with certain persons, the loss of export privileges, reputational harm, adverse 
media coverage, and other collateral consequences. If any subpoenas, investigations, or other enforcement actions are launched, 
or governmental or other sanctions are imposed, or if we do not prevail in any possible civil or criminal litigation, our business, 
results of operations and financial condition could be materially harmed. In addition, responding to any action will likely result 
in a materially significant diversion of management’s attention and resources and significant defense and compliance costs and 
other professional fees. In certain cases, enforcement authorities may even cause us to appoint an independent compliance 
monitor which can result in added costs and administrative burdens.
We are subject to governmental export and import controls that could impair our ability to compete in international 
markets due to licensing requirements and subject us to liability if we are not in compliance with applicable laws.
Our products and solutions are subject to export control and import laws and regulations, including the U.S. Export 
Administration Regulations, U.S. Customs regulations, and various economic and trade sanctions regulations administered by 
the U.S. Treasury Department’s Office of Foreign Assets Controls. Exports of our products and solutions outside of the United 
States must be made in compliance with these laws and regulations. If we fail to comply with these laws and regulations, we 
and certain of our employees could be subject to substantial civil or criminal penalties, including the possible loss of export or 
import privileges, fines, which may be imposed on us and responsible employees or managers, and, in extreme cases, the 
incarceration of responsible employees or managers.
In addition, changes in our products or solutions or changes in applicable export or import laws and regulations may 
create delays in the introduction, provision, or sale of our products and solutions in international markets, prevent customers 
from using our products and solutions or, in some cases, prevent the export or import of our drugs and solutions to certain 
countries, governments or persons altogether. Any limitation on our ability to export, provide, or sell our products and solutions 
could adversely affect our business, financial condition and results of operations.
Changes in U.S. and international trade policies, particularly with respect to China and Canada, may adversely impact 
our business and operating results.
We rely on third party contract manufacturing organizations, or CMOs, to produce our product candidate. One of our 
CMOs has a Chinese subcontractor that produces regulatory starting materials. Another CMO operates in Canada and produces 
our drug product. The U.S. government has recently made statements and taken certain actions that may lead to potential 
changes to U.S. and international trade policies, including imposing several rounds of tariffs and export control restrictions. 
Recently both China and Canada have each imposed tariffs indicating the potential for further trade barriers. It is unknown 
whether and to what extent new tariffs, export controls, or other new laws or regulations will be adopted, or the effect that any 
such actions would have on us or our industry. Sustained uncertainty about, or the further escalation of, trade and political 
tensions could result in a disadvantageous manufacturing environment in China and Canada. Any unfavorable government 
policies on international trade, such as capital controls or tariffs, or export controls, may increase the cost of manufacturing of 
our product candidate, and may affect the import of raw materials and drug product used in our preclinical and clinical studies 
from China, Canada, or other countries. 
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If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or 
penalties or incur costs that could harm our business.
We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory 
procedures and the handling, use, storage, treatment and disposal of hazardous materials and wastes. From time to time and in 
the future, our operations may involve the use of hazardous and flammable materials, including chemicals and biological 
materials, and may also produce hazardous waste products. Even if we contract with third parties for the disposal of these 
materials and waste products, we cannot completely eliminate the risk of contamination or injury resulting from these materials. 
In the event of contamination or injury resulting from the use or disposal of our hazardous materials, we could be held liable for 
any resulting damages, and any liability could exceed our resources. We also could incur significant costs associated with civil 
or criminal fines and penalties for failure to comply with such laws and regulations.
We maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our 
employees resulting from the use of hazardous materials, however this insurance may not provide adequate coverage against 
potential liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted against 
us.
In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety 
laws and regulations. Current or future environmental laws and regulations may impair our research, development or production 
efforts. In addition, failure to comply with these laws and regulations may result in substantial fines, penalties or other 
sanctions.
Our employees may engage in misconduct or other improper activities, including non-compliance with regulatory 
standards and requirements, which could cause significant liability for us and harm our reputation.
We are exposed to the risk of employee fraud or other misconduct, including intentional failures to comply with FDA 
regulations or similar regulations of comparable foreign regulatory authorities, provide accurate information to the FDA or 
comparable foreign regulatory authorities, comply with manufacturing standards we have established, comply with federal and 
state healthcare fraud and abuse laws and regulations and similar laws and regulations established and enforced by comparable 
foreign regulatory authorities, report financial information or data accurately or disclose unauthorized activities to us. Employee 
misconduct could also involve the improper use of 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 the precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks 
or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in 
compliance with such laws, standards or regulations. If any such actions are instituted against us, and we are not successful in 
defending ourselves or asserting our rights, those actions could have a significant impact on our business and results of 
operations, including the imposition of significant fines or other sanctions.
Our internal computer systems, or those of any collaborators or contractors or consultants, may fail or suffer security 
breaches or other cyber incidents, which could result in a material disruption of our product development program.
Despite the implementation of security measures and certain data recovery measures, our internal computer systems and 
those of our current and any future collaborators and other contractors or consultants are vulnerable to damage or other impacts 
from cyber-attacks, computer viruses, unauthorized access, sabotage, natural disasters, terrorism, war and telecommunication 
and electrical failures. We may experience security breaches of our information technology systems. Any system failure, 
accident or security breach that causes interruptions in our operations, for us or those third parties with which we contract, 
could result in a material disruption of our product development program and our business operations, whether due to a loss of 
our trade secrets or other proprietary information or other similar disruptions, in addition to possibly requiring substantial 
expenditures of resources to remedy. For example, the loss of clinical trial data from an ongoing, completed or future clinical 
trial 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 
inappropriate disclosure of confidential or proprietary information, we may incur liabilities, our competitive position could be 
harmed and the further development and commercialization of emavusertib may be delayed. In addition, we may not have 
adequate insurance coverage to provide compensation for any losses associated with such events.
We are subject to risks caused by misappropriation, misuse, leakage, falsification or intentional or accidental release or 
loss of information maintained in the information systems and networks of our company, including personal information of our 
employees. In addition, outside parties have in the past penetrated, and may in the future penetrate, our systems or those of our 
vendors or fraudulently induce our employees or employees of our vendors to disclose sensitive information to an unintended 
recipient or to gain access to our data. Like other companies, we have experienced, and may in the future experience, threats to 
our data and systems, including malicious codes and viruses, phishing, and other cyber-attacks. The number and complexity of 
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these threats continue to increase over time. If a material breach of our security or that of our vendors occurs, the market 
perception of the effectiveness of our security measures could be harmed, we could lose business and our reputation and 
credibility could be damaged. We could be required to expend significant amounts of money and other resources to repair or 
replace information systems or networks. Although we develop and maintain systems and controls designed to prevent these 
events from occurring, and we have a process to identify and mitigate threats, the development and maintenance of these 
systems, controls and processes is costly and requires ongoing monitoring and updating as technologies change and efforts to 
overcome security measures become more sophisticated. Moreover, despite our efforts, the possibility of these events occurring 
cannot be eliminated entirely.
RISKS RELATING TO OUR COMMON STOCK
If we fail to meet the requirements for continued listing on the Nasdaq Capital Market, our common stock could be 
delisted from trading, which would decrease the liquidity of our common stock and our ability to raise additional 
capital.
Our common stock is currently listed on the Nasdaq Capital Market. We are required to meet specified requirements to 
maintain our listing on the Nasdaq Capital Market, including a minimum bid price of $1.00 per share for our common stock and 
standards relative to minimum stockholders’ equity, minimum market value of publicly held shares and various additional 
requirements. In the past we have, from time to time, received deficiency letters from Nasdaq as a consequence of our failure to 
satisfy such requirements. On February 21, 2025, we received a deficiency letter from Listing Qualifications Department of 
Nasdaq notifying us that the market value of our listed securities had closed for the last 30 consecutive business days below the 
minimum $35,000,000 requirement for continued listing on the Nasdaq Capital Market pursuant to Nasdaq Listing Rule 
5550(b)(2), or Minimum MVLS Requirement. We have 180 calendar days, or until August 20, 2025, or Compliance Period, to 
regain compliance with the Minimum MVLS Requirement. In order to regain compliance, the market value of our listed 
securities must close at $35,000,000 or more for a minimum of ten consecutive business days. If we do not regain compliance 
within the Compliance Period, we will receive written notification that our securities are subject to delisting from the Nasdaq 
Capital Market. There can be no assurance that we can regain, or maintain in the future, compliance with the Nasdaq continued 
listing requirements.
If we fail to satisfy the Nasdaq Capital Market’s continued listing requirements and we are delisted from Nasdaq, we may 
transfer to and commence trading on the OTC Markets or another quotation medium. As a result, an investor would likely find 
it more difficult to trade or obtain accurate price quotations for our shares. Delisting would likely also reduce the visibility, 
liquidity, and value of our common stock, reduce institutional investor interest in our company, and may increase the volatility 
of our common stock. Delisting could also cause a loss of confidence of potential industry partners, lenders, and employees, 
which could further harm our business and our future prospects. Some or all of these material adverse consequences may 
contribute to a further decline in our stock price.
Our stock price has and may continue to fluctuate significantly and the market price of our common stock could drop 
below the price paid by our investors.
The trading price of our common stock has been volatile and is likely to continue to be volatile in the future. The stock 
market, particularly in recent years, has experienced significant volatility with respect to pharmaceutical and biotechnology 
company stocks. 
Prices for our stock will be determined in the marketplace and may be influenced by many factors, including:
•
the timing and result of clinical trials of emavusertib;
•
regulatory actions with respect to emavusertib or our competitors’ products and drug candidates;
•
market conditions in the biotechnology and pharmaceutical sectors;
•
actual or anticipated changes to our research and development plans;
•
the success of, and announcements regarding, existing and new technologies and/or drug candidates by us or our 
competitors;
•
rumors relating to us or our collaborators or competitors;
•
commencement or termination of collaborations;
•
litigation or public concern about the safety of emavusertib;
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•
deviations in our operating results from the estimates of securities analysts or the failure by one or more securities 
analysts to continue to cover our stock;
•
entering into new collaboration agreements or termination of existing collaboration agreements;
•
adverse results or delays in clinical trials being conducted by us or any collaborators;
•
any intellectual property disputes or other lawsuits involving us;
•
third party sales of large blocks of our common stock;
•
sales of our common stock by our executive officers, directors or significant stockholders;
•
sales by us of our common stock to fund our operations;
•
the loss of any of our key scientific or management personnel;
•
limited trading volume in our common stock;
•
actual or anticipated variations in our quarterly operating results and any subsequent restatement of such results;
•
general economic and market conditions, including adverse changes in the domestic and international financial 
markets; and 
•
the other factors described in this “Risk Factors” section.
While we cannot predict the individual effect that these factors may have on the price of our common stock, these factors, 
either individually or in the aggregate, could result in significant variations in price during any given period of time.
In the past, securities class action litigation has often been instituted against companies following periods of volatility in 
their stock price. This type of litigation could result in substantial costs and divert our management’s attention and resources.
Fluctuations in our quarterly and annual operating results could adversely affect the price of our common stock which 
could result in substantial losses for purchasers of our common stock.
Our quarterly and annual operating results may fluctuate significantly. Some of the factors that may cause our operating 
results to fluctuate on a period-to-period basis include:
•
payments we may be required to make to collaborators to exercise license rights and satisfy milestones and royalty 
obligations;
•
the status of, and level of expenses incurred in connection with, our program for emavusertib;
•
any intellectual property infringement lawsuit or other litigation in which we may become involved;
•
the implementation of restructuring and cost-savings strategies;
•
the occurrence of an event of default under the Oberland Purchase Agreement;
•
the implementation or termination of collaboration, licensing, manufacturing or other material agreements with third- 
parties, and non-recurring revenue or expenses under any such agreement; 
•
compliance with regulatory requirements; 
•
fluctuations in sales of Erivedge and related royalty and milestone payments; and
•
general conditions in the global economy and financial markets.
If any of the foregoing matters were to occur, or if our operating results fall below the expectations of investors or 
securities analysts, the price of our common stock could decline substantially, which could result in substantial losses for 
purchasers of our common stock. In addition, we currently have no drug revenues and depend entirely on funds raised through 
other sources, such as funding through equity offerings. Our ability to raise funds in this manner depends upon, among other 
things, our stock price.
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We and our collaborators may not achieve projected research, development, commercialization and marketing goals in 
the time frames that we or they announce, which could have an adverse impact on our business and could cause our 
stock price to decline.
We set goals for, and make public statements regarding, the timing of certain accomplishments, such as the 
commencement and completion of preclinical studies, and clinical trials, and other developments and milestones relating to our 
business and our collaboration agreements. Our collaborators may also make public statements regarding their goals and 
expectations for their collaborations with us. The actual timing of any such events can vary dramatically due to a number of 
factors including delays or failures in our and our current and potential future collaborators’ preclinical studies or clinical trials, 
the amount of time, effort and resources committed to our program by all parties, and the inherent uncertainties in the 
regulatory approval and commercialization process. As a result:
•
our or our collaborators’ preclinical studies and clinical trials may not advance or be completed in the time frames we 
or they announce or expect;
•
we or our collaborators may not make regulatory submissions, receive regulatory approvals or commercialize 
approved drugs as predicted; and
•
we or our collaborators may not be able to adhere to our or their current schedule for the achievement of key 
milestones under any program.
If we or any collaborators fail to achieve research, development and commercialization goals as planned, our business 
could be materially adversely affected and the price of our common stock could decline.
Future sales of shares of our common stock, including by us, employees and large stockholders, including pursuant to 
our 2024 Sales Agreement with Cantor and JonesTrading could result in dilution to our stockholders and negatively 
affect our stock price.
Most of our outstanding common stock can be traded without restriction at any time. As such, sales of a substantial 
number of shares of our common stock in the public market could occur at any time. These sales, or the perception in the 
market that the holders of a large number of shares intend to sell such shares, could reduce the market price of our common 
stock.
We have a significant number of shares that are subject to outstanding options and in the future, we may issue additional 
options, warrants or other derivative securities convertible into our common stock. The exercise of any such options, warrants 
or other derivative securities, and the subsequent sale of the underlying common stock, could cause a further decline in our 
stock price and could dilute our stockholders. These sales also might make it difficult for us to sell equity securities in the future 
at a time and at a price that we deem appropriate.
In addition, we may offer and sell up to $100.0 million shares of common stock registered under our universal shelf 
registration statement on Form S-3 pursuant to our 2024 Sales Agreement with Cantor and JonesTrading, in one or more “at-
the-market” offerings. We have sold 188,316 shares under our 2024 Sales Agreement, representing gross proceeds of $1.2 
million during the year ended December 31, 2024. The extent to which we continue to utilize the 2024 Sales Agreement with 
Cantor and JonesTrading as a source of funding will depend on a number of factors, including the prevailing market price of 
our common stock, general market conditions and other restrictions and the extent to which we are able to secure funds from 
other sources. 
In addition, sales of substantial amounts of shares of our common stock or other securities by us or our employees and 
other stockholders could dilute our stockholders, lower the market price of our common stock and impair our ability to raise 
capital through the sale of equity or equity-related securities.
We do not intend to pay dividends on our common stock, and any return to investors will come, if at all, only from 
potential increases in the price of our common stock.
We have never declared nor paid cash dividends on our common stock. We currently plan to retain all of our future 
earnings, if any, to finance the operation, development and growth of our business. As a result, capital appreciation, if any, of 
our common stock will be your sole source of gain for the foreseeable future.
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We have anti-takeover defenses that could delay or prevent an acquisition that our stockholders may consider 
favorable, or prevent attempts by our stockholders to replace or remove current management, which could result in a 
decline in the price of our common stock.
Provisions of our certificate of incorporation, our bylaws, and Delaware law may deter unsolicited takeovers or delay or 
prevent changes in control of our management, including transactions in which our stockholders might otherwise receive a 
premium for their shares over then-current market prices. In addition, these provisions may limit the ability of stockholders to 
approve transactions that they may deem to be in their best interest. For example, we have divided our board of directors into 
three classes that serve staggered three-year terms, we may issue shares of our authorized “blank check” preferred stock, and 
our stockholders are limited in their ability to call special stockholder meetings.
In addition, we are subject to the anti-takeover provisions of Section 203 of the Delaware General Corporation Law, 
which prohibits an “interested stockholder,” which is either a person who owns at least 15% of our outstanding voting stock or 
an affiliate or associate of ours who owned at least 15% of our outstanding voting stock at any time within the prior three years, 
from engaging in a business combination with us 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. These provisions 
could discourage, delay or prevent a change in control.
GENERAL RISK FACTORS
If we are not able to maintain effective internal controls under Section 404 of the Sarbanes-Oxley Act, our 
business and stock price could be adversely affected. 
Section 404 of the Sarbanes-Oxley Act of 2002 requires us, on an annual basis, to review and evaluate our internal 
controls. Any failure by us to maintain the effectiveness of our internal controls in accordance with the requirements of 
Section 404 of the Sarbanes-Oxley Act, as such requirements exist today or may be modified, supplemented or amended in the 
future, could have a material adverse effect on our business, operating results and stock price.
Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.
Under Section 382 of the Internal Revenue Code of 1986, as amended, or the Code, if a company undergoes an 
“ownership change,” generally defined as a greater than 50% change (by value) in its equity ownership by certain stockholders 
over a three-year period, the corporation’s ability to use its pre-change net operating loss carryforwards and other pre-change 
tax attributes (such as research tax credits) to offset its post change taxable income or taxes may be limited. Changes in our 
stock ownership, some such changes being out of our control, may have resulted or could in the future result in an ownership 
change. If such an ownership change occurred or occurs in the future, utilization of a portion of our net operating loss and tax 
credit carryforwards could be limited in future periods and a portion of the carryforwards could expire before being available to 
reduce future income tax liabilities.
There is also a risk that due to regulatory changes, such as suspensions on the use of net operating losses, or other 
unforeseen reasons, our existing net operating losses could expire or otherwise become unavailable to offset future income tax 
liabilities. In addition, under current law, net operating loss carryforwards arising after December 31, 2017 may only be used to 
offset 80% of taxable income in a year (although such losses may be carried forward indefinitely), which may significantly 
impact our ability to utilize our net operating losses to offset taxable income in the future. In addition, state net operating losses 
generated in one state cannot be used to offset income generated in another state. For these reasons, even if we attain 
profitability, we may be unable to use a material portion of our net operating losses and other tax attributes.
We are subject to risks associated with public health crises and epidemics/pandemics, such as the COVID-19 
pandemic.
Public health outbreaks, epidemics, and pandemics of contagious or infectious diseases, such as COVID-19, may 
significantly disrupt our business. Such outbreaks pose the risk that we or our employees, contractors, suppliers, or other 
partners may be prevented from conducting business activities for an indefinite period of time due to spread of the disease, or 
due to shutdowns that may be requested or mandated by federal, state and local governmental authorities. Business disruptions 
could include disruptions or restrictions on our ability to travel, as well as temporary closures of our facilities or the facilities of 
our contractors, suppliers, and other partners. Outbreaks could also impact the global supply chain, primarily through 
constraints on raw materials. Constraints on raw materials could also impact companies outside of our direct industry, which 
could result in a competitive supply environment causing higher costs. Additionally, the risk of cyber-attacks or other privacy 
or data security incidents may be heightened as a result of our moving increasingly towards a remote working environment as a 
result of public health outbreaks, which may be less secure and more susceptible to hacking attacks.
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ITEM 1B.
UNRESOLVED STAFF COMMENTS
Not applicable.
ITEM 1C.
CYBERSECURITY
We have processes for assessing, identifying and managing cybersecurity risks, which are built into our information 
technology function and are designed to help protect our information assets and operations from internal and external cyber 
threats, protect employee and clinical trial information from unauthorized access or attack, as well as secure our networks and 
systems. Such processes include physical, procedural and technical safeguards, response plans, and routine review of our 
policies and procedures to identify risks and refine our practices. We engage certain external parties, including consultants, to 
enhance our cybersecurity oversight. 
Our Audit Committee of the Board of Directors, or the Audit Committee, is responsible for overseeing cybersecurity risk 
and periodically updates our Board of Directors on such matters. The Audit Committee receives periodic updates from 
management, including our head of information technology, regarding cybersecurity matters, and is notified between such 
updates regarding any significant new cybersecurity threats or incidents. We do not believe that there are currently any risks 
from known cybersecurity threats, including as a result of any prior cybersecurity incidents, that have material affected or are 
reasonably likely to materially affect us, including our business strategy, results of operations or financial condition.
Management is responsible for the operational oversight of company-wide cybersecurity strategy, policy, and standards. 
Our head of information technology, who has 25 years of information technology management experience, reports to our chief 
financial officer, oversees and manages the day-to-day functions of our cybersecurity risks, and works with an incident 
response team to evaluate security and privacy incidents and the implementation of appropriate actions.
In an effort to deter and detect cyber threats, we annually provide all employees with cybersecurity and prevention 
training, which covers timely and relevant topics, including social engineering, phishing, password protection, confidential data 
protection, and mobile security, and educate employees on the importance of reporting all incidents immediately. We also use 
technology-based tools to mitigate cybersecurity risks and to bolster our employee-based cybersecurity programs.
ITEM  2.
PROPERTIES
Our headquarters consist of office and laboratory space in Lexington, Massachusetts. We occupy approximately 31,112 
feet of space under a lease agreement, which we entered into in December 2019 and which was amended in January 2022. We 
believe this office and laboratory space will be sufficient to meet our needs for the foreseeable future and that suitable 
additional space will be available as and when needed.
ITEM  3.
LEGAL PROCEEDINGS
We are currently not a party to any material legal proceedings.
ITEM  4.
MINE SAFETY DISCLOSURES
Not applicable.
PART II
ITEM  5.
MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS 
AND ISSUER PURCHASES OF EQUITY SECURITIES
Market Information.    Our common stock is traded on the Nasdaq Capital Market under the trading symbol “CRIS.”
Holders.    On March 27, 2025, there were 99 holders of record of our common stock. The number of record holders may 
not be representative of the number of beneficial owners because many of the shares of our common stock are held by 
depositories, brokers or other nominees.
Dividends.    We have never declared or paid any cash dividends on our common stock. We currently intend to retain 
earnings, if any, to support our business strategy and do not anticipate paying cash dividends in the foreseeable future. Payment 
of future dividends, if any, will be at the sole discretion of our board of directors after taking into account various factors, 
including our financial condition, operating results, capital requirements and any plans for expansion.
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Issuer Purchases of Equity Securities.    None. 
Unregistered Sales of Equity Securities.    During the period covered by this Annual Report on Form 10-K, we did not 
issue any unregistered equity securities other than pursuant to transactions previously disclosed in our Current Reports on Form 
8-K.
Performance Graph.    Not required.
ITEM 6.
[RESERVED]
ITEM  7.
MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS 
OF OPERATIONS
The following discussion of our financial condition and results of operations should be read in conjunction with the 
Consolidated Financial Statements and the related notes appearing elsewhere in this Annual Report. This discussion contains 
forward-looking statements, based on current expectations and related to future events and our future financial performance, 
that involve risks and uncertainties. Our actual results may differ materially from those anticipated in these forward-looking 
statements as a result of many important factors, including those set forth under Part I, Item 1A, “Risk Factors” and elsewhere 
in this Annual Report. As used throughout this Annual Report, the terms “the Company,” “we,” “us,” and “our” refer to the 
business of Curis, Inc. and its wholly owned subsidiaries, except where the context otherwise requires, and the term “Curis” 
refers to Curis, Inc. 
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Overview
Emavusertib
We are a biotechnology company focused on the development of emavusertib (CA-4948), an orally available, small 
molecule inhibitor of Interleukin-1 receptor associated kinase, or IRAK4. IRAK4 plays an essential role in the toll-like receptor, 
or TLR, and interleukin-1 receptor, or IL-1R, signaling pathways, which are frequently dysregulated in patients with cancer. 
TLRs and the IL-1R family signal through the adaptor protein Myeloid Differentiation Primary Response Protein 88, which 
results in the assembly and activation of IRAK4, initiating a signaling cascade that induces cytokine and survival factor 
expression mediated by the NF-κB protein complex. Many B-cell leukemias and lymphomas are associated with constitutive 
activation of the NF-κB protein complex, which contributes to these cancers' proliferation and survival. The B-cell receptor, or 
BCR, and TLR pathways drive NF-κB activation. Preclinical studies have demonstrated that targeting both the BCR and TLR 
pathways is more synergistic than targeting either pathway alone. Similarly, preclinical studies targeting IRAKi in combination 
with FMS-like tyrosine kinase 3, or FLT3, have demonstrated the ability to overcome the adaptive resistance incurred when 
targeting FLT3 alone. In acute myeloid leukemia, or AML, patient derived xenografts, emavusertib has shown monotherapy 
anti-tumor activity as well as synergy with both azacitidine and venetoclax. In the clinic, emavusertib has shown anti-tumor 
activity across a broad range of hematologic malignancies, including monotherapy activity in AML, particularly those with a 
FLT3 mutation. In non-Hodgkin's lymphoma patients, particularly in primary central nervous system lymphoma, or PCNSL, 
emavusertib has shown anti-tumor activity in combination with a Bruton Tyrosine Kinase, or BTK, inhibitor. 
TakeAim Lymphoma
Emavusertib is currently undergoing testing in combination with ibrutinib, a BTK inhibitor, in a Phase 1/2 open-label, 
single arm expansion trial in patients with relapsed or refractory, or R/R, PCNSL (CA-4948-101, NCT03328078), also known 
as the TakeAim Lymphoma Phase 1/2 study. In June 2022 and December 2023, we provided preliminary clinical data for 
patients with various hematological malignancies in the combination portion of the ongoing TakeAim Lymphoma Phase 1/2 
study. In December 2023, we provided clinical and safety data of emavusertib in combination with ibrutinib in several non-
Hodgkin's lymphoma subtypes, including PCNSL patients. In July and December 2024, emavusertib was granted Orphan Drug 
Designation by the European Commission and the U.S. Food and Drug Administration, or FDA, respectively, for the treatment 
of patients with PCNSL. In September 2024 and March 2025, we provided additional clinical data of emavusertib in 
combination with ibrutinib in R/R PCNSL. We expect additional data from this study in the fourth quarter of 2025.
In March 2025, we announced that we had completed productive meetings with both the European Committee for 
Medicinal Products for Human Use, or CHMP, and the FDA on the suitability of using the ongoing TakeAim Lymphoma Phase 
1/2 study to support a potential accelerated regulatory path for a Conditional Marketing Authorization, or CMA, submission in 
Europe and a New Drug Application, or NDA, submission in the U.S.   
 
 
 
 
 
 
 
For submission in Europe, we engaged CHMP for scientific advice on the potential for CMA submission, with the 
following feedback:
•
Current, single-arm, study could support a CMA;
•
Primary endpoint of Overall Response Rate, or ORR, for a single-arm study is supported; 
•
45 patients may be sufficient to support a CMA, assuming compelling and consistent results; 
•
Due to the rarity of disease the proposed size of the safety database may be acceptable and will be a review issue for 
CMA; and
•
Contribution of effect of each of emavusertib and ibrutinib as well as the emavusertib/ibrutinib combination in a 
BTKi-naïve population is required for CMA.
For submission in the U.S., we discussed with FDA the potential for an NDA submission for Accelerated Approval based 
on the lack of approved treatments, with the following feedback:
•
Current, single-arm, study could support a submission for Accelerated Approval;
•
ORR, supported by adequate duration of response, could be acceptable for Accelerated Approval; 
•
The number of patients needed to support safety and efficacy is a review issue, which is part of the NDA submission 
process; and
•
An analysis of 100 mg vs 200 mg emavusertib dosing and contribution of effect of emavusertib, ibrutinib, and the 
emavusertib/ibrutinib combination in a BTKi-naïve population is required prior to NDA submission.
Both the CHMP and FDA encouraged us to continue discussions to align on the confirmatory study design, which is 
required prior to the CMA or NDA submission.
TakeAim Leukemia
In addition to the TakeAim Lymphoma Phase 1/2 study, emavusertib is currently undergoing testing in a Phase 1/2 open-
label, single arm expansion trial in patients with R/R AML and high-risk myelodysplastic syndromes (CA-4948-102, 
NCT04278768), also known as the TakeAim Leukemia Phase 1/2 study. In January and December 2022, July and December 
2023, and May and December 2024, we presented clinical data for patients from the ongoing TakeAim Leukemia Phase 1/2 
study. Enrollment in the TakeAim Leukemia study is substantially complete.
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AML Triplet Study
We have initiated a Phase 1 clinical study of emavusertib as an add-on agent to the combination of azacitidine and 
venetoclax in AML (CA-4948-104, 2023-505828-58), which we refer to as the AML Triplet study. The AML Triplet study is 
currently being conducted in Spain, Germany, and Italy. The study is assessing the safety and tolerability of different dosing 
regimens of emavusertib in the triple combination in patients who achieved a complete remission on venetoclax and azacitidine, 
while remaining positive for minimal residual disease. To date, the trial has enrolled the first dosing cohort of emavusertib in 
combination with azacitidine and venetoclax. All patients in this cohort tolerated the triple regimen well, with no unexpected 
adverse events. As a result, the external Clinical Safety Review Committee recommended to escalate to the next dosing cohort, 
and enrollment for this cohort is currently ongoing.
Our Collaborations and License Agreements
We are party to a collaboration agreement with Genentech Inc., or Genentech, a member of the Roche Group, under 
which Genentech and F. Hoffmann-La Roche Ltd, or Roche, are commercializing Erivedge® (vismodegib), a first-in-class 
orally administered small molecule Hedgehog signaling pathway antagonist. Erivedge is approved for the treatment of 
advanced basal cell carcinoma, or BCC.
In January 2015, we entered into an exclusive collaboration agreement with Aurigene Discovery Technologies Limited, 
or Aurigene, which was amended in September 2016, February 2020, and September 2024, for the discovery, development and 
commercialization of small molecule compounds in the areas of immuno-oncology and precision oncology worldwide, except 
for India and Russia, which are territories retained by Aurigene. We currently have licensed the IRAK4 (including 
emavusertib), PD1/TIM3, and the immuno-oncology programs under the Aurigene collaboration.
Liquidity and Events that Raise Substantial Doubt About Our Ability to Continue as a Going Concern
Since our inception, we have funded our operations primarily through private and public placements of our equity 
securities, license fees, contingent cash payments, royalties and research and development funding from our corporate 
collaborators, and the monetization of certain royalty rights. We have never been profitable on an annual basis and had an 
accumulated deficit of $1.2 billion as of December 31, 2024. For the year ended December 31, 2024, we incurred a net loss of 
$43.4 million and used $39.6 million of cash in operations. We expect to continue to generate operating losses in the 
foreseeable future. In March 2025, we completed a registered direct offering and concurrent private placement for net proceeds 
of approximately $9.0 million. We expect these available cash resources, together with the proceeds from the March 2025 
offering, to fund our existing operations into the fourth quarter of 2025. We have based this assessment on assumptions that 
may prove to be wrong, and we could exhaust our available capital resources sooner than we expect. Our current cash and cash 
equivalents are not expected to fund our operations beyond 12 months from the date of filing this Annual Report on Form 10-K. 
We will require substantial additional funds in the immediate term to maintain our research and development program and 
support operations. See “Risk Factors – We have identified conditions and events that raise substantial doubt about our ability 
to continue as a going concern.”, “Liquidity and Capital Resources—Funding Requirements” below and Note 1, “Nature of 
Business,” to our Consolidated Financial Statements included in Part II, Item 8, “Financial Statements and Supplementary 
Data,” of this Annual Report on Form 10-K for a further discussion of our liquidity and the conditions and events that raise 
substantial doubt regarding our ability to continue as a going concern.
We will need to generate significant revenues to achieve profitability, and do not expect to achieve profitability in the 
foreseeable future, if at all. We will require additional funding to fund the development of emavusertib through regulatory 
approval and commercialization, and to support our continued operations. We will need to seek additional funding through a 
number of potential avenues, including private or public equity financings, collaborations, or other strategic transactions. If 
sufficient funds are not available, we will have to delay, reduce the scope of, or eliminate our research and development 
program for emavusertib, including related clinical trials and operating expenses, potentially delaying the time to market for or 
preventing the marketing of emavusertib, which could adversely affect our business prospects and our ability to continue our 
operations, and would have a negative impact on our financial condition and ability to pursue our business strategies. In 
addition, we may seek to engage in one or more strategic alternatives, such as a strategic partnership with one or more parties, 
the licensing, sale or divestiture of some of our assets or proprietary technologies or the sale of our company, but there can be 
no assurance that we would be able to enter into such a transaction or transactions on a timely basis or on terms favorable to us, 
or at all. If we are unable to obtain sufficient capital, we would be unable to fund our operations and may be required to 
evaluate alternatives, which could include dissolving and liquidating our assets or seeking protection under the bankruptcy 
laws, and a determination to file for bankruptcy could occur at a time that is earlier than when we would otherwise exhaust our 
cash resources. If we decide to dissolve and liquidate our assets or to seek protection under the bankruptcy laws, it is unclear to 
what extent we would be able to pay our obligations, and, accordingly, it is further unclear whether and to what extent any 
resources would be available for distributions to stockholders.
Key Drivers
We believe that near term key drivers to our success will include:
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•
our ability to focus and successfully plan and execute current and planned clinical trials for emavusertib, and for such 
clinical trials to generate favorable data; 
•
our ability to raise additional financing to fund operations; and/or
•
our ability to collaborate or license emavusertib and to successfully develop and commercialize emavusertib. 
Our Collaborations and License Agreements
Our current collaborations and license agreements are summarized below and detailed in the Business section of this 
Annual Report on Form 10-K. See "Item 1. Business—Our Collaborations and License Agreements."
Aurigene
Our exclusive collaboration agreement, as amended, with Aurigene provides for the discovery, development and 
commercialization of small molecule compounds in the areas of immuno-oncology and selected precision oncology targets. As 
of December 31, 2024, we have licensed the IRAK4, PD1/TIM3, and the immuno-oncology programs under the Aurigene 
collaboration, including emavusertib. 
Under the collaboration agreement, as amended, Aurigene granted us an option to obtain exclusive, royalty-bearing 
licenses to relevant Aurigene technology to develop, manufacture and commercialize products containing certain of such 
compounds anywhere in the world, except for India and Russia, which are territories retained by Aurigene. 
For each of the current licensed programs, we have remaining unpaid or unwaived payment obligations of $42.5 million 
per program, related to regulatory approval and commercial sales milestones, plus specified additional payments for approvals 
for additional indications, if any. 
We have agreed to pay Aurigene tiered royalties on our and our affiliates’ annual net sales of products at percentage rates 
ranging from the high single digits up to 10%, subject to specified reductions. In addition, we have agreed to make certain 
payments to Aurigene upon our entry into sublicense agreements on any program(s).
Genentech Hedgehog Signaling Pathway Collaboration Agreement
In 2003, we entered into a collaborative research, development and license agreement with Genentech, which we refer to 
as the collaboration agreement. 
Under the terms of our collaboration agreement with Genentech, we granted Genentech an exclusive, global, royalty-
bearing license, with the right to sublicense, to make, use, sell and import molecules capable of inhibiting the Hedgehog 
signaling pathway (including small molecules, proteins and antibodies) for human therapeutic applications, including cancer 
therapy. Genentech subsequently granted a sublicense to Roche for non-U.S. rights to Erivedge, other than in Japan where such 
rights are held by Chugai. Genentech and Roche are responsible for worldwide clinical development, regulatory affairs, 
manufacturing and supply, formulation, and sales and marketing of Erivedge.
We are eligible to receive up to an aggregate of $115.0 million in contingent cash milestone payments, exclusive of 
royalty payments, in connection with the development of Erivedge or another small molecule Hedgehog pathway inhibitor, 
assuming the successful achievement by Genentech and Roche of specified clinical development and regulatory objectives. Of 
this amount, we have received $59.0 million to date. 
In addition to the contingent cash milestone payments, our wholly owned subsidiary, Curis Royalty, LLC, or Curis 
Royalty, is entitled to a royalty on net sales of Erivedge that ranges from 5% to 7.5% based upon global Erivedge sales by 
Roche and Genentech. We recognized $10.9 million of royalty revenue from Genentech’s net sales of Erivedge during the year 
ended December 31, 2024.
Financial Operations Overview
General.    Our future operating results will largely depend on the progress of emavusertib. The results of our operations 
will vary significantly from year to year and quarter to quarter and depend on, among other factors, the cost and outcome of any 
preclinical development or clinical trials then being conducted. For a discussion of our liquidity and funding requirements, see 
“Liquidity and Events that Raise Substantial Doubt About Our Ability to Continue as a Going Concern” and “Liquidity and 
Capital Resources – Funding Requirements”. 
Liability Related to the Sale of Future Royalties.   In March 2019, we and our wholly owned subsidiary, Curis Royalty 
LLC, or Curis Royalty, entered into the royalty interest purchase agreement, or the Oberland Purchase Agreement, with entities 
managed by Oberland Capital Management, LLC, or the Purchasers, and Lind SA LLC, as collateral agent for the Purchasers, 
or Agent. Pursuant to the Oberland Purchase Agreement, the Purchasers acquired the rights to a portion of certain royalty and 
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royalty-related payments excluding a portion of non-U.S. royalties retained by Curis Royalty, referred to as the Purchased 
Receivables, owed by Genentech under our collaboration agreement with Genentech. Upon closing of the Oberland Purchase 
Agreement, Curis Royalty received proceeds of $65.0 million from the Purchasers, approximately $33.8 million of which was 
used to pay off the remaining loan principal under the credit agreement with HealthCare Royalty Partners III, L.P., or 
HealthCare Royalty, and $3.7 million of which was used to pay transaction costs, including $3.4 million to HealthCare Royalty 
in accrued and unpaid interest and prepayment fees under the loan, resulting in net proceeds of $27.5 million. Curis Royalty 
will also be entitled to receive milestone payments of $53.5 million if the Purchasers receive payments pursuant to the Oberland 
Purchase Agreement in excess of $117.0 million on or prior to December 31, 2026, which milestone payments may each be 
paid, at the option of the Purchasers, in a lump sum in cash or out of the Purchaser’s portion of future payments under the 
Oberland Purchase Agreement. 
Revenue.    We do not expect to generate any revenues from our direct sale of products for several years, if ever. 
Substantially all of our revenues to date have been derived from license fees, research and development payments, and other 
amounts that we have received from our strategic collaborators and licensees, including royalty payments. We recognize royalty 
revenues related to Genentech’s sales of Erivedge and we expect to continue to recognize royalty revenue in future quarters 
from Genentech’s sales of Erivedge in the U.S. and Roche’s sales of Erivedge outside of the U.S. However, a significant 
portion of our royalty and royalty-related revenues under our collaboration with Genentech will be paid to the Purchasers, 
pursuant to the Oberland Purchase Agreement. The Oberland Purchase Agreement will terminate upon the earlier to occur of (i) 
the date on which Curis Royalty’s rights to receive the Purchased Receivables owed by Genentech under the Genentech 
collaboration agreement have terminated in their entirety or (ii) the date on which payment in full of the Put/Call Price is 
received by the Purchasers pursuant to the Purchasers’ exercise of their put option or Curis Royalty’s exercise of its call right. 
For additional information regarding the Oberland Purchase Agreement, see Note 8, “Liability Related to the Sale of Future 
Royalties,” to our Consolidated Financial Statements included in Part II, Item 8, “Financial Statements and Supplementary 
Data,” of this Annual Report on Form 10-K.
We could receive additional milestone payments from Genentech, provided that contractually specified development and 
regulatory objectives are met. Also, we could receive milestone payments from the Purchasers, provided that contractually 
specified royalty payment amounts are met within applicable time periods. Our only source of revenues and/or cash flows from 
operations for the foreseeable future will be royalty payments that are contingent upon the continued commercialization of 
Erivedge under our collaboration with Genentech, and contingent cash payments for the achievement of clinical, development 
and regulatory objectives, if any, that are met, under our collaboration with Genentech. Our receipt of additional payments 
under our collaboration with Genentech cannot be assured, nor can we predict the timing of any such payments, as the case may 
be.
Research and Development.    Research and development expense primarily consists of costs incurred to develop 
emavusertib. These expenses consist primarily of: 
•
salaries and related expenses for personnel, including stock-based compensation expense;
•
costs of conducting clinical trials, including amounts paid to clinical centers, clinical research organizations and 
consultants, among others;
•
other outside service costs including regulatory costs and costs for contract manufacturing;
•
the cost of companion drugs;
•
facility costs; and
•
certain payments that we make to Aurigene under our collaboration agreement, including, for example, milestone 
payments.
We expense research and development costs as incurred. 
Research and development activities are central to our business model. Drug candidates in later stages of clinical 
development generally have higher development costs than those in earlier stages, primarily due to the increased size and 
duration of later-stage clinical trials. As a result, we expect that our research and development expenses will increase 
substantially over the next several years as we conduct larger clinical trials of emavusertib; prepare regulatory filings for 
emavusertib; continue to develop additional drug candidates; and potentially advance our drug candidates into later stages of 
clinical development. 
The successful development and commercialization of emavusertib is highly uncertain. At this time, we cannot reasonably 
estimate or know the nature, timing and costs of the efforts that will be necessary to complete the preclinical and clinical 
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development of emavusertib. This uncertainty is due to the numerous risks and uncertainties associated with product 
development and commercialization, including the uncertainty of:
•
our ability to successfully enroll our current and future clinical trials and our ability to initiate future clinical trials;
•
the scope, quality of data, rate of progress and cost of clinical trials and other research and development activities 
undertaken by us or our collaborators;
•
the cost and timing of regulatory approvals and maintaining compliance with regulatory requirements;
•
the results of future preclinical studies and clinical trials;
•
the cost of establishing clinical and commercial supplies of emavusertib and any products that we may develop;
•
the cost and timing of establishing sales, marketing and distribution capabilities;
•
our ability to become and remain profitable, which requires that we, either alone or with collaborators, must develop 
and eventually commercialize emavusertib with significant market potential and successfully launch a product for 
commercial sale;
•
the effect of competing technological and market developments; and
•
the cost and effectiveness of filing, prosecuting, defending and enforcing any patent claims and other intellectual 
property rights.
Any changes in the outcome of any of these variables with respect to the development of emavusertib could mean a 
significant change in the costs and timing associated with the development of emavusertib. For example, if the FDA or another 
regulatory authority requests additional or unanticipated data for our clinical trials or requires us to conduct clinical trials or 
other testing beyond those that we currently expect, or if we experience significant delays in enrollment in any of our clinical 
trials, we could be required to expend significant additional financial resources and time to complete clinical development of 
that drug candidate. We may never obtain regulatory approval for emavusertib. If we do obtain regulatory approval for our drug 
candidate, drug commercialization will take several years and the associated costs will be significant.
A further discussion of some of the risks and uncertainties associated with completing our research and development 
program on schedule, or at all, and some consequences of failing to do so, are set forth under “Part I, Item 1A—Risk Factors” 
of this Annual Report on Form 10-K. 
General and Administrative.    General and administrative expense consists primarily of salaries and related expenses, 
including stock-based compensation expense for personnel in executive, finance, accounting, business development, legal, 
information technology, corporate communications and human resource functions. Other costs include facility costs not 
otherwise included in research and development expense, insurance, and professional fees for legal, patent and accounting 
services. Patent costs include certain patents covered under collaborations, a portion of which is reimbursed by collaborators 
and a portion of which is borne by us.
Critical Accounting Estimates
The preparation of our Consolidated Financial Statements in conformity with accounting principles generally accepted in 
the United States requires that we make estimates and assumptions that affect the reported amounts and disclosure of certain 
assets and liabilities at our balance sheet date. We base our estimates on historical experience and on various other factors that 
we believe to be appropriate under the circumstances, the results of which form the basis for making judgments about the 
carrying value of certain 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 more fully described in Note 2, “Summary of Significant Accounting 
Policies,” to our Consolidated Financial Statements included in Part II, Item 8, “Financial Statements and Supplementary Data,” 
of this Annual Report on Form 10-K, we believe that the following accounting estimates are critical to understanding the 
judgment and estimate we use in preparing our financial statements.
The discussion of our critical accounting estimates is not intended to be a comprehensive discussion of all of our 
accounting estimates. In many cases, the accounting treatment of a particular transaction is specifically dictated by generally 
accepted accounting principles, with no need for management’s judgment in their application. There are also areas in which 
management’s judgment in selecting any available alternative would not produce a materially different result.
Accrued Research and Development 
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We have entered into various agreements with contract research organizations, or CROs, contract manufacturing 
organizations, or CMOs, and other service providers. Our research and development accruals are estimated based on the level of 
services performed, progress of the studies, and contracted costs. The estimated costs of research and development provided, 
but not yet invoiced, are included in accrued liabilities on the balance sheet. If the actual timing of the performance of services 
or the level of effort varies from the original estimates, we will adjust the accrual accordingly. Payments made to third parties 
under these arrangements in advance of the performance of the related services are recorded as prepaid expenses and other 
current assets and other assets until the services are rendered. To date, our estimated accruals have not differed materially from 
actual costs incurred.
Results of Operations (all amounts rounded to the nearest thousand)
Years Ended December 31, 2024 and December 31, 2023
The following table summarizes our results of operations for the years ended December 31, 2024 and December 31, 2023: 
For the Year Ended
December 31,
Percentage Increase/ 
(Decrease)
2024
2023
Revenues, net
$ 
10,908 $ 
10,023 
 9 %
Costs and Expenses:
Cost of royalties
 
98  
212 
 (54) %
Research and development
 
38,562  
39,496 
 (2) %
General and administrative
 
16,790  
18,647 
 (10) %
Other income
 
1,153  
919 
 25 %
Net loss
$ 
(43,389) $ 
(47,413) 
 (8) %
Revenues, net
Revenues, net increased by $0.9 million, or 9%, for the year ended December 31, 2024 as compared to the year ended 
December 31, 2023. Revenues, net are primarily comprised of royalties on net sales of Erivedge.
Cost of royalties
Cost of royalties is comprised of amounts due to third party university patent licensors in connection with Genentech and 
Roche's Erivedge net sales.
Research and Development Expenses. 
Research and development expenses are summarized as follows:
For the Year Ended
December 31,
Percentage Increase/ 
(Decrease)
2024
2023
Direct research and development expenses
$ 
22,246 $ 
23,078 
 (4) %
Employee related costs
 
14,499  
14,330 
 1 %
Facility related costs
 
1,817  
2,088 
 (13) %
Total research and development expenses
$ 
38,562 $ 
39,496 
 (2) %
Research and development expense decreased by $0.9 million or 2%, for the year ended December 31, 2024 as compared 
to the year ended December 31, 2023. The decrease was primarily attributable to lower clinical and consulting costs, partially 
offset by higher manufacturing costs. 
We expect that a majority of our research and development expenses for the foreseeable future will be incurred in 
connection with our efforts to advance emavusertib, including clinical and preclinical development costs, manufacturing, and 
payments to our collaborators and/or licensors.
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General and Administrative Expenses. 
General and administrative expenses are summarized as follows:
For the Year Ended
December 31,
Percentage Increase/ 
(Decrease)
2024
2023
Employee related costs
$ 
8,722 $ 
9,171 
 (5) %
Professional, legal, and consulting costs
 
4,810  
5,598 
 (14) %
Facility related costs
 
2,354  
2,810 
 (16) %
Insurance costs
 
904  
1,068 
 (15) %
Total general and administrative expenses
$ 
16,790 $ 
18,647 
 (10) %
General and administrative expenses decreased by $1.9 million, or 10%, for the year ended December 31, 2024 as 
compared to the year ended December 31, 2023. The decrease was primarily attributable to lower consulting, legal, facility, 
insurance, and employee-related costs. 
Other Income 
Other income increased by $0.2 million, or 25%, for the year ended December 31, 2024 as compared to the year ended 
December 31, 2023. The increase was primarily attributable to a decrease in the expense related to the sale of future royalties 
partially offset by a decrease in interest income. 
Liquidity and Capital Resources
We have financed our operations primarily through private and public placements of our equity securities, license fees, 
contingent cash payments and research and development funding from our corporate collaborators, and the monetization of 
certain royalty rights. See “Funding Requirements” below and Note 1, “Nature of Business,” to our Consolidated Financial 
Statements included in Part II, Item 8, "Financial Statements and Supplementary Data," of this Annual Report on Form 10-K 
for a further discussion of our liquidity and the conditions and events that raise substantial doubt regarding our ability to 
continue as a going concern.
As of December 31, 2024, our principal sources of liquidity consisted of cash and cash equivalents of $20.0 million, 
excluding our restricted cash, long-term of $0.5 million. Our cash and cash equivalents are highly liquid investments with a 
maturity of three months or less at date of purchase. We maintain cash balances with financial institutions in excess of insured 
limits.
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Equity Offerings
In February 2024, we entered into an amended and restated sales agreement, or the 2024 Sales Agreement, with Cantor 
Fitzgerald & Co., or Cantor, and JonesTrading Institutional Services LLC, or JonesTrading, to sell from time to time up to 
$100.0 million shares of our common stock through an “at-the-market offering” program under which Cantor and JonesTrading 
act as sales agents. We sold 188,316 shares under the 2024 Sales Agreement representing gross proceeds of $1.2 million during 
the year ended December 31, 2024.
In July 2023, we issued and sold, in a registered direct offering to certain institutional investors an aggregate of 920,488 
shares of our common stock at a purchase price of $16.40 per share for net proceeds of approximately $13.8 million.
In October 2024, we entered into a securities purchase agreement with certain institutional investors, pursuant to which 
we issued and sold: (i) in a registered direct offering, 2,398,414 shares of our common stock and (ii) in a concurrent private 
placement, warrants to purchase up to an aggregate of 2,398,414 shares of our common stock, or the Warrants, at an exercise 
price of $4.92 per share. We refer to the registered direct offering and concurrent private placement collectively as the October 
2024 Offerings. The Warrants were exercisable immediately upon closing on October 30, 2024 and will expire five years 
following the issuance date. The combined purchase price for one share of common stock and the associated Warrant was 
$5.045. The net proceeds we received from the October 2024 Offerings were approximately $10.8 million, excluding the 
proceeds from any exercise of the Warrants.
In March 2025, we entered into a securities purchase agreement with certain institutional investors, pursuant to which we 
agreed to sell and issue: (i) in a registered direct offering, 1,974,432 shares of our common stock and (ii) in a concurrent private 
placement, (a) in lieu of Shares to certain investors, unregistered pre-funded warrants to purchase up to an aggregate of 
2,184,009 shares our common stock (the “Pre-Funded Warrants”), at an exercise price of $0.01 per share, and (b) unregistered 
warrants (the “Common Warrants” and together with the Pre-Funded Warrants, the “Unregistered Warrants”) to purchase up to 
an aggregate of 8,316,882 shares of our common stock, at an exercise price of $2.41 per share. Each Common Warrant will be 
exercisable beginning on the effective date of stockholder approval of the issuance of the shares of Common Stock upon 
exercise of the Common Warrants and will have a term of five years from the date of issuance. Each Pre-Funded Warrant will 
be exercisable immediately upon issuance and continuing through and including the date the Pre-Funded Warrant is exercised 
in full. The combined purchase price for one share of our common stock and the associated Common Warrant is $2.41. The 
combined purchase price for one Pre-Funded Warrant and the associated Common Warrant is $2.40. The aggregate gross 
proceeds to the Company from the Offerings were approximately $10.0 million, before deducting fees payable to the placement 
agent, advisory fees and other estimated offering expenses payable by the Company, and excluding the proceeds from any 
exercise of the Unregistered Warrants. 
Royalty Interest Purchase Agreement
In March 2019, we and Curis Royalty entered into the royalty interest purchase agreement, or the Oberland Purchase 
Agreement, with the Purchasers. We sold to the Purchasers rights to a portion of certain royalty and royalty-related payments 
excluding a portion of non-U.S. royalties retained by Curis Royalty, referred to as the Purchased Receivables, owed by 
Genentech under our collaboration agreement with Genentech.
As upfront consideration for the purchase of the royalty rights, the Purchasers paid to Curis Royalty $65.0 million less 
certain transaction expenses. Curis Royalty will also be entitled to receive up to $53.5 million in milestone payments based on 
sales of Erivedge if the Purchasers receive payments pursuant to the Oberland Purchase Agreement in excess of $117.0 million 
on or prior to December 31, 2026. For further discussion please refer to Note 8, “Liability Related to the Sale of Future 
Royalties,” to our Consolidated Financial Statements included in Part II, Item 8, “Financial Statements and Supplementary 
Data,” of this Annual Report on Form 10-K.
The Oberland Purchase Agreement has default provisions, that if triggered, would require Curis Royalty to repurchase at 
a price, or the Put/Call Price, equal to 250% of the sum of the upfront purchase price and any portion of the milestone payments 
paid in a lump sum by the Purchasers, if any, minus certain payments previously received by the Purchasers with respect to the 
Purchased Receivables. 
Cash Flows from Operating Activities
Cash flows from operating activities consist of our net loss adjusted for various non-cash items and changes in operating 
assets and liabilities. Cash used in operating activities during 2024 and 2023 was $39.6 million and $38.4 million, respectively. 
Net cash used in operations increased $1.1 million in 2024 compared to 2023 due to timing of payments partially offset by 
decreased operating expenses.
Cash Flows from Investing Activities
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Cash provided by investing activities in 2024 and 2023 was $29.4 million and $37.8 million, respectively. Cash provided 
by investing activities during both periods was primarily attributable to net investment activity from purchases and sales and 
maturities of short-term investments for the respective periods.
Cash Flows from Financing Activities
Cash provided by financing activities in 2024 and 2023 was $3.4 million and $7.6 million, respectively. Cash provided by 
financing activities in 2024 was primarily due to proceeds from the October 2024 Offerings and 2024 Sales Agreement, 
partially offset by payments related to the Oberland Purchase Agreement. Cash provided by financing activities in 2023 was 
primarily due to proceeds from the 2023 registered direct offering, partially offset by payments related to the Oberland 
Purchase Agreement.
Funding Requirements
We have incurred significant losses since our inception. As of December 31, 2024, we had an accumulated deficit of 
approximately $1.2 billion. We will require substantial funds in the immediate term to continue our research and development 
program and to fulfill our planned operating goals. Our planned operating and capital requirements currently include the 
support of our current and future research and development activities for emavusertib as well as development candidates we 
have and continue to license under our collaboration with Aurigene. We will require substantial additional capital in the 
immediate term to fund the further development of emavusertib and our general and administrative costs. Moreover, our 
agreements with collaborators impose significant potential financial obligations on us.
In March 2025, we completed a registered direct offering and concurrent private placement for net proceeds of 
approximately $9.0 million. Based upon our current operating plan, we believe that our existing cash and cash equivalents of 
$20.0 million as of December 31, 2024, together with the proceeds from the March 2025 offering, should enable us to fund our 
existing operations into the fourth quarter of 2025. We have based this assessment on assumptions that may prove to be wrong, 
and we could exhaust our available capital resources sooner than we expect. Our current cash and cash equivalents are not 
expected to fund our operations beyond 12 months from the date of filing this Annual Report on Form 10-K. See Note 1, “Risk 
Factors – We have identified conditions and events that raise substantial doubt about our ability to continue as a going 
concern.” and “Nature of Business,” to our Consolidated Financial Statements included in Part II, Item 8, “Financial Statements 
and Supplementary Data,” of this Annual Report on Form 10-K for a further discussion of our liquidity and the conditions and 
events that raise substantial doubt regarding our ability to continue as a going concern. Our resources are focused on 
emavusertib. If we are unable to obtain sufficient funding, we will be forced to delay, reduce in scope or eliminate our research 
and development program for emavusertib, including related clinical trials and operating expenses, potentially delaying the time 
to market for, or preventing the marketing of, emavusertib, which would adversely affect our business prospects and our ability 
to continue operations, and would have a negative impact on our financial condition and our ability to pursue our business 
strategies. We have faced and expect to continue to face substantial difficulty in raising capital. Our ability to raise additional 
funds will depend on financial, economic and market conditions, many of which are outside of our control, and we may be 
unable to raise financing when needed, or on terms favorable to us, or at all. In addition, we may seek to engage in one or more 
strategic alternatives, such as a strategic partnership with one or more parties, the licensing, sale or divestiture of some of our 
assets or proprietary technologies or the sale of our company, but there can be no assurance that we would be able to enter into 
such a transaction or transactions on a timely basis or on terms favorable to us, or at all. Our failure to raise capital through a 
financing or strategic alternative as and when needed would have a negative impact on our financial condition and our ability to 
pursue our business strategy. If we are unable to obtain sufficient capital, we would be unable to fund our operations and may 
be required to evaluate alternatives, which could include dissolving and liquidating our assets or seeking protection under the 
bankruptcy laws, and a determination to file for bankruptcy could occur at a time that is earlier than when we would otherwise 
exhaust our cash resources. If we decide to dissolve and liquidate our assets or to seek protection under the bankruptcy laws, it 
is unclear to what extent we would be able to pay our obligations, and, accordingly, it is further unclear whether and to what 
extent any resources would be available for distributions to stockholders.
Furthermore, there are a number of factors that may affect our future capital requirements and further accelerate our need 
for additional working capital, many of which are outside our control, including the following:
•
unanticipated costs in our research and development program;
•
the timing and cost of obtaining regulatory approvals for emavusertib and maintaining compliance with regulatory 
requirements;
•
payments due to licensors, including Aurigene, for patent rights and technology used in our drug development 
programs;
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•
the costs of commercialization activities for emavusertib if it receives marketing approval, to the extent such costs are 
our responsibility, including the costs and timing of establishing drug sales, marketing, distribution and manufacturing 
capabilities;
•
unplanned costs to prepare, file, prosecute, defend and enforce patent claims and other patent-related costs, including 
litigation costs and technology license fees; and
•
our ability to continue as a going concern.
To become and remain profitable, we, either alone or with collaborators, must develop and eventually commercialize one 
or more drug candidates with significant market potential. This will require us to be successful in a range of challenging 
activities, including completing preclinical testing and clinical trials of our drug candidates, obtaining marketing approval for 
these drug candidates, manufacturing, marketing and selling those drugs for which we may obtain marketing approval and 
satisfying any post marketing requirements. We may never succeed in these activities and, even if we do, may never generate 
revenues that are significant or large enough to achieve profitability. While Erivedge is being commercialized by Genentech 
and Roche, emavusertib is currently only in early clinical testing.
For the foreseeable future, we will need to spend significant capital in an effort to develop and commercialize 
emavusertib and we expect to incur substantial operating losses. Our failure to become and remain profitable would, among 
other things, depress the market price of our common stock and could impair our ability to raise capital, expand our business, 
diversify our research and development program or continue our operations.
Contractual Obligations
Our headquarters consist of office and laboratory space in Lexington, Massachusetts. We occupy approximately 31,112 
feet of space. In addition to the base rent, we are responsible for our share of operating expenses and real estate taxes for a 
portion of the leased space, in accordance with the terms of the lease agreement. The future minimum lease payments and 
related obligations under the agreement are $4.1 million over 2.3 years. In addition, our cash commitments for outside service 
obligations are $1.1 million over 2.5 years. 
New Accounting Pronouncements
See Note 2, "Summary of Significant Accounting Policies," to our Consolidated Financial Statements included in Part II, 
Item 8, “Financial Statements and Supplementary Data,” of this Annual Report on Form 10-K for a description of recent 
accounting pronouncements applicable to our business. 
ITEM  7A.
QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Not required.
ITEM 8.
FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
Report of Independent Registered Public Accounting Firm
To the Board of Directors and Stockholders of Curis, Inc.
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Curis, Inc. and its subsidiaries (the "Company") as of 
December 31, 2024 and 2023, and the related consolidated statements of operations and comprehensive loss, of stockholders’ 
equity (deficit) and of cash flows for the years then ended, including 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 as of December 31, 2024 and 2023, and the results of its operations and its cash flows for 
the years then ended in conformity with accounting principles generally accepted in the United States of America.
Substantial Doubt about the Company’s Ability to Continue as a Going Concern
The accompanying consolidated financial statements have been prepared assuming that the Company will continue as a going 
concern. As discussed in Note 1 to the consolidated financial statements, the Company has incurred recurring losses and cash 
outflows from operations that raise substantial doubt about its ability to continue as a going concern. Management's plans in 
regard to these matters are also described in Note 1. The consolidated financial statements do not include any adjustments that 
might result from the outcome of this uncertainty.
Basis for Opinion
These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express 
an opinion on the Company’s consolidated financial statements based on our audits. We are a public accounting firm registered 
with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with 
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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 of these consolidated financial statements in accordance with the standards of the PCAOB. Those 
standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial 
statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we 
engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an 
understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness 
of the Company's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, 
whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a 
test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included 
evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall 
presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.
Critical Audit Matters
The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial 
statements that was communicated or required to be communicated to the audit committee and that (i) relates to accounts or 
disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or 
complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated 
financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate 
opinion on the critical audit matter or on the accounts or disclosures to which it relates.
External Research and Development Costs
As described in Note 2 to the consolidated financial statements, research and development costs are expensed as incurred. 
These expenses primarily include salaries and related expense for personnel, including stock-based compensation expense, 
external research and development costs, regulatory costs, facility costs, and certain payments made under collaboration 
agreements. The Company’s research and development expense for the year ended December 31, 2024 was $38.6 million, a 
significant portion of which relates to external research and development costs. Management recognizes external research and 
development costs based on an evaluation of the level of activity and services performed using information provided to the 
Company by its service providers. This process involves reviewing vendor invoices, open contracts and purchase orders, 
communicating with applicable personnel to identify services that have been performed on the Company’s behalf, and 
estimating the level of service performed and the associated cost incurred for the service when the Company has not yet been 
invoiced or otherwise notified of actual costs. 
The principal consideration for our determination that performing procedures relating to external research and development 
costs is a critical audit matter is a high degree of auditor effort in performing procedures related to the Company’s external 
research and development costs.
Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall 
opinion on the consolidated financial statements. These procedures included, among others, testing external research and 
development costs, on a sample basis, by obtaining and inspecting source documentation such as the underlying contractual 
agreements, purchase orders, invoices received, and information received from third-party service providers, where applicable.
/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
March 31, 2025
We have served as the Company's auditor since 2002.
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CURIS, INC. AND SUBSIDIARIES
Consolidated Balance Sheets
(In thousands, except share and per share data)
December 31,
2024
2023
ASSETS
Current assets:
Cash and cash equivalents
$ 
19,997 $ 
26,681 
Short-term investments
 
—  
29,653 
Accounts receivable
 
3,349  
2,794 
Prepaid expenses and other current assets
 
3,039  
1,780 
Total current assets
 
26,385  
60,908 
Property and equipment, net
 
231  
434 
Restricted cash, long-term
 
544  
544 
Operating lease right-of-use asset
 
3,163  
3,056 
Other assets
 
1,960  
3,358 
Goodwill
 
8,982  
8,982 
Total assets
$ 
41,265 $ 
77,282 
LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Current liabilities:
Accounts payable
$ 
3,024 $ 
3,172 
Accrued liabilities
 
7,111  
9,040 
Current portion of operating lease liability
 
1,336  
1,305 
Current portion of liability related to sale of future royalties
 
7,556  
8,504 
Total current liabilities
 
19,027  
22,021 
Long-term operating lease liability
 
1,618  
1,489 
Liability related to the sale of future royalties, net
 
26,618  
34,102 
Total liabilities
 
47,263  
57,612 
Commitments and contingencies, Note 7
Stockholders’ equity:
Preferred stock, $0.01 par value—5,000,000 shares authorized, no shares issued and 
outstanding at December 31, 2024 and 2023
 
—  
— 
Common stock, $0.01 par value—34,171,875 shares authorized, 8,487,818 shares 
issued and outstanding at December 31, 2024; 22,781,250 shares authorized, 5,894,085 
shares issued and outstanding at December 31, 2023
 
85  
59 
Additional paid-in capital
 
1,233,716  
1,215,792 
Accumulated deficit
 
(1,239,799)  
(1,196,410) 
Accumulated other comprehensive gain (loss)
 
—  
229 
Total stockholders’ equity (deficit)
 
(5,998)  
19,670 
Total liabilities and stockholders’ equity (deficit)
$ 
41,265 $ 
77,282 
The accompanying notes are an integral part of these consolidated financial statements.
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CURIS, INC. AND SUBSIDIARIES
Consolidated Statements of Operations and Comprehensive Loss
(In thousands, except share and per share data)
Years Ended December 31,
2024
2023
Revenues, net
$ 
10,908 $ 
10,023 
Operating expenses:
Cost of royalties
 
98  
212 
Research and development
 
38,562  
39,496 
General and administrative
 
16,790  
18,647 
Total operating expenses
 
55,450  
58,355 
Loss from operations
 
(44,542)  
(48,332) 
Other income:
Interest income
 
1,768  
2,938 
Expense related to the sale of future royalties
 
(615)  
(2,019) 
Total other income
 
1,153  
919 
Net loss
$ 
(43,389) $ 
(47,413) 
Net loss per common share (basic and diluted)
$ 
(6.88) $ 
(8.96) 
Weighted average common shares (basic and diluted)
 
6,306,284  
5,293,294 
Net Loss
$ 
(43,389) $ 
(47,413) 
Other comprehensive income (loss):
Unrealized gain (loss) on marketable securities
 
(229)  
415 
Comprehensive loss
$ 
(43,618) $ 
(46,998) 
The accompanying notes are an integral part of these consolidated financial statements.
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CURIS, INC. AND SUBSIDIARIES
Consolidated Statements of Stockholders’ Equity (Deficit)
(In thousands, except share data)
 
Common Stock
Additional
Paid-in
Capital
Accumulated
Deficit
Accumulated
Other
Comprehensive
Gain (Loss)
Total
Stockholders’
Equity 
(Deficit)
 
Shares
Amount
December 31, 2022
 
4,830,464 
$ 
48 
$ 1,195,687 
$ (1,148,997) $ 
(186) $ 
46,552 
Issuance of common stock in connection with 2023 
Registered Direct, net of issuance costs
 
920,488 
 
9 
 
13,805 
 
— 
 
—  
13,814 
Stock-based compensation
 
— 
 
— 
 
6,000 
 
— 
 
—  
6,000 
Issuance of common stock under employee benefit 
plans, including restricted stock awards
 
149,633 
 
2 
 
300 
 
— 
 
—  
302 
Cancellation of restricted stock awards
 
(6,500)  
— 
 
— 
 
— 
 
—  
— 
Unrealized gain on marketable securities
 
— 
 
— 
 
— 
 
— 
 
415  
415 
Net loss
 
— 
 
— 
 
— 
 
(47,413)  
—  
(47,413) 
December 31, 2023
 
5,894,085 
$ 
59 
$ 1,215,792 
$ (1,196,410) $ 
229 $ 
19,670 
Stock-based compensation
 
— 
 
— 
 
5,927 
 
— 
 
—  
5,927 
Issuance of common stock in connection with 
October 2024 Financings, net of issuance costs
 
2,398,414 
 
24 
 
5,948 
 
— 
 
—  
5,972 
Issuance of warrants in connection with October 
2024 Financings, net of issuance costs
 
— 
 
— 
 
4,798 
 
— 
 
—  
4,798 
Issuance of shares in connection with 2024 Sales 
Agreement, net of issuance costs
 
188,316 
 
2 
 
1,110 
 
— 
 
—  
1,112 
Issuance of common stock under employee benefit 
plans, net of shares received to settle minimum tax 
obligation for vesting of restricted stock awards
 
11,378 
 
— 
 
141 
 
— 
 
—  
141 
Cancellation of restricted stock awards
 
(4,375)  
— 
 
— 
 
— 
 
—  
— 
Reclassification of accumulated gain on maturity of 
investments
 
— 
 
— 
 
— 
 
— 
 
(229)  
(229) 
Net loss
 
— 
 
— 
 
— 
 
(43,389)  
—  
(43,389) 
December 31, 2024
 
8,487,818 
 
85 
 1,233,716 
 
(1,239,799)  
—  
(5,998) 
The accompanying notes are an integral part of these consolidated financial statements.
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CURIS, INC. AND SUBSIDIARIES
Consolidated Statements of Cash Flows
(In thousands)
 
Years Ended December 31,
 
2024
2023
Cash flows from operating activities:
Net loss
$ 
(43,389) $ 
(47,413) 
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization
 
203 
 
255 
Non-cash lease expense
 
1,274 
 
1,344 
Stock-based compensation expense
 
5,927 
 
6,000 
Non-cash activity related to the sale of future royalties
 
154 
 
(340) 
Amortization of premiums and discounts on investments
 
(16)  
(1,059) 
Changes in operating assets and liabilities:
Accounts receivable
 
(555)  
181 
Prepaid expenses and other assets
 
139 
 
405 
Accounts payable and accrued and other liabilities
 
(2,077)  
3,340 
Operating lease liability
 
(1,223)  
(1,147) 
Total adjustments
 
3,826 
 
8,979 
Net cash used in operating activities
 
(39,563)  
(38,434) 
Cash flows from investing activities:
Purchases of investments
 
(18,098)  
(70,340) 
Sales and maturities of investments
 
47,540 
 
108,126 
Net cash provided by investing activities
 
29,442 
 
37,786 
Cash flows from financing activities:
Proceeds from issuance of common stock and Warrants, net of issuance costs
 
12,023 
 
14,117 
Payment of liability of future royalties, net of imputed interest
 
(8,586)  
(6,537) 
Net cash provided by financing activities
 
3,437 
 
7,580 
Net increase (decrease) in cash and cash equivalents and restricted cash
 
(6,684)  
6,932 
Cash and cash equivalents and restricted cash, beginning of period
 
27,225 
 
20,293 
Cash and cash equivalents and restricted cash, end of period
$ 
20,541 
$ 
27,225 
Supplemental cash flow data:
Issuance costs in accounts payable
 
50 
 
— 
Cash paid for interest
 
461 
 
2,359 
Increase in right-of-use assets and operating lease liabilities resulting from lease modification
 
(1,383)  
— 
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents
 
19,997 
 
26,681 
Restricted cash, long-term
 
544 
 
544 
Total cash, cash equivalents and restricted cash shown in the statement of cash flows
$ 
20,541 
$ 
27,225 
 
The accompanying notes are an integral part of these consolidated financial statements.
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98

Notes to Consolidated Financial Statements
(1)
Nature of Business
Curis, Inc. is a biotechnology company focused on the development of emavusertib (CA-4948), an orally available, small 
molecule inhibitor of Interleukin-1 receptor associated kinase, or IRAK4. Throughout these Consolidated Financial Statements, 
Curis, Inc. and its wholly owned subsidiaries are collectively referred to as the “Company” or “Curis”.
The Company is party to a collaboration agreement with Genentech Inc. (“Genentech”), a member of the Roche Group, 
under which Genentech and F. Hoffmann-La Roche Ltd (“Roche”) are commercializing Erivedge® (vismodegib), a first-in-
class orally administered small molecule Hedgehog signaling pathway antagonist. Erivedge is approved for the treatment of 
advanced basal cell carcinoma (“BCC”).
The Company is party to an exclusive collaboration agreement with Aurigene Discovery Technologies Limited 
(“Aurigene”) for the discovery, development and commercialization of small molecule compounds in the areas of immuno-
oncology and precision oncology, including emavusertib.
The Company is subject to risks common to companies in the biotechnology industry as well as risks that are specific to 
the Company’s business, including, but not limited to: the Company’s ability to obtain adequate financing to fund its 
operations; the Company’s ability to continue as a going concern; the Company’s ability to advance and expand its research and 
development program for emavusertib; the Company’s ability to execute on its overall business strategies; the Company’s 
ability to obtain and maintain necessary intellectual property protection; development by the Company’s competitors of new or 
better technological innovations; the Company’s ability to comply with regulatory requirements; the Company’s ability to 
obtain and maintain applicable regulatory approvals and commercialize any approved drug candidates; and the ability of the 
Company and its wholly owned subsidiary, Curis Royalty, LLC (“Curis Royalty”), to satisfy the terms of the royalty interest 
purchase agreement (the “Oberland Purchase Agreement”) with TPC Investments I LP and TPC Investments II LP (the 
“Purchasers”), each of which is a Delaware limited partnership managed by Oberland Capital Management, LLC, and Lind SA 
LLC (the “Agent”), a Delaware limited liability company managed by Oberland Capital Management, LLC, as collateral agent 
for the Purchasers.
The Company’s future operating results will largely depend on the progress of emavusertib and the magnitude of 
payments that it may receive and make under its current and potential future collaborations. The results of the Company’s 
operations have varied and will likely continue to vary significantly from year to year and quarter to quarter and depend on a 
number of factors, including, but not limited to the timing, outcome and cost of the Company’s preclinical studies and clinical 
trials for its drug candidate.
The Company will require substantial funds in the immediate term to maintain its research and development program and 
support operations. The Company has incurred losses and cash outflows from operations since its inception. The Company had 
an accumulated deficit of approximately $1.2 billion as of December 31, 2024 and incurred a net loss of $43.4 million and used 
$39.6 million of cash in operations for the year ended December 31, 2024. The Company expects to continue to generate 
operating losses in the foreseeable future. 
In accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 
2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (Subtopic 205-40), the 
Company has concluded there are conditions and events, considered in the aggregate, that raise substantial doubt about the 
Company’s ability to continue as a going concern within one year after the date that the Consolidated Financial Statements are 
issued. Based on the Company's $20.0 million of existing cash and cash equivalents at December 31, 2024, recurring losses and 
cash outflows from operations since inception, an expectation of continuing losses and cash outflows from operations for the 
foreseeable future and the need to raise additional capital to finance the Company's future operations, the Company concluded it 
does not have sufficient cash on hand to support current operations within the next 12 months from the date of filing this 
Annual Report on Form 10-K. These factors raise substantial doubt regarding the Company’s ability to continue as a going 
concern.
The Company plans to seek additional funding through a number of potential avenues, including private or public equity 
financings, collaborations, or other strategic transactions. The Company has faced and expects to continue to face substantial 
difficulty in raising capital. The Company may not be able to obtain funding on acceptable terms, or at all. The terms of any 
financing may adversely affect the holdings or the rights of the Company’s stockholders. The Company’s ability to raise 
additional funds will depend, among other factors, on financial, economic and market conditions, many of which are outside of 
its control, and it may be unable to raise financing when needed, or on terms favorable to the Company. If necessary funds are 
not available, the Company will have to delay, reduce the scope of, or eliminate its development of emavusertib, potentially 
delaying the time to market for or preventing the marketing of emavusertib, which would have a material adverse effect on the 
Company’s operations and future prospects. If the Company is unable to obtain sufficient capital, the Company would be 
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99

unable to fund its operations and may be required to evaluate alternatives, which could include dissolving and liquidating its 
assets or seeking protection under the bankruptcy laws, and a determination to file for bankruptcy could occur at a time that is 
earlier than when the Company would otherwise exhaust its cash resources. If the Company decides to dissolve and liquidate its 
assets or to seek protection under the bankruptcy laws, it is unclear to what extent the Company would be able to pay its 
obligations, and, accordingly, it is further unclear whether and to what extent any resources would be available for distributions 
to stockholders.
(2)
Summary of Significant Accounting Policies
(a)
Basis of Presentation and Principles of Consolidation
The accompanying Consolidated Financial Statements have been prepared in conformity with accounting principles 
generally accepted in the U.S. (“GAAP”) and include the accounts of our wholly owned subsidiaries. All intercompany 
balances and transactions have been eliminated in consolidation.
The Company’s Consolidated Financial Statements have been prepared on a going concern basis, which contemplates the 
realization of assets and satisfaction of liabilities in the ordinary course of business. In accordance with FASB ASU No. 
2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (Subtopic 205-40), the 
Company has concluded there are conditions and events, considered in the aggregate, that raise substantial doubt about the 
Company’s ability to continue as a going concern within one year after the date that the Consolidated Financial Statements are 
issued. The Consolidated Financial Statements do not include any adjustments that might result from the outcome of this 
uncertainty.
(b)
Use of Estimates and Assumptions
The preparation of the Company’s Consolidated Financial Statements in conformity with GAAP requires management to 
make estimates and assumptions that affect the reported amounts and disclosure of revenue, expenses and certain assets and 
liabilities at the balance sheet date. Such estimates include the performance obligations under the Company’s collaboration 
agreements; the collectability of receivables; and the value of certain liabilities. Actual results may differ from such estimates. 
(c)
Cash Equivalents, Restricted Cash, and Investments
Cash equivalents consist of highly liquid investments purchased with original maturities of three months or less. 
The Company classified $0.5 million of its cash as restricted cash, long-term as of both December 31, 2024 and 2023. 
These amounts represent the security deposit associated with the Company's Lexington, Massachusetts headquarters. 
The Company’s short-term investments were marketable debt securities with original maturities of greater than three 
months from the date of purchase, but less than twelve months from the balance sheet date. Marketable securities consisted of 
commercial paper, corporate bonds and notes, and/or government obligations. All of the Company’s investments were 
designated available-for-sale and are stated at fair value. Unrealized gains and losses on investments are included in 
accumulated other comprehensive income (loss) as a separate component of stockholders’ equity. Realized gains and losses, 
dividends and interest income are included in other income in the period during which the securities are sold. Any premium or 
discount arising at purchase is amortized and/or accreted to interest income. As of December 31, 2024, all of the Company's 
investments have matured.
(d)
Concentrations and Significant Customer Information
Financial instruments which potentially subject the Company to concentrations of credit risk consist principally of cash 
and cash equivalents and accounts receivable. The Company maintains deposits in federally insured financial institutions in 
excess of federally insured limits. 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's operations are located entirely within the U.S. The Company's focus is primarily on the development of 
emavusertib, a small molecule IRK4 inhibitor. The Company's customer, Genentech, accounted for 100% and 99% of the total 
gross revenues for the years ended December 31, 2024 and 2023, respectively.
The Company’s accounts receivable at December 31, 2024 and December 31, 2023 represents amounts due from royalties 
earned on sales of Erivedge by Genentech and Roche.
The Company relies on third parties to manufacture and supply emavusertib. In addition, there are a small number of 
suppliers for certain raw materials that the Company uses to manufacture emavusertib. 
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(e)
Long-Lived Assets Other than Goodwill
 
Long-lived assets other than goodwill consist of property and equipment. The Company applies the guidance in FASB 
Codification Topic 360-10-05, Impairment or Disposal of Long-Lived Assets. If it were determined that the carrying value of 
the Company’s other long-lived assets might not be recoverable based upon the existence of one or more indicators of 
impairment, the Company would measure for impairment. Recoverability is measured by a comparison of the carrying amount 
of an asset to future net cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its 
estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset 
exceeds the fair value of the asset. The Company did not recognize any material impairment charges for the years ended 
December 31, 2024 or December 31, 2023.
Purchased equipment is recorded at cost. The Company does not currently hold any leased equipment. Depreciation and 
amortization are provided on the straight-line method over the estimated useful lives of the related assets or the remaining terms 
of the leases, whichever is shorter, as follows:
Useful Life
Laboratory equipment, computers and software
3-5 years
Leasehold improvements
Lesser of lease or asset life
Office furniture and equipment
5 years
(f)
Leases
The Company determines if an arrangement is a lease at contract inception. The Company made an accounting policy 
election to not recognize leases with an initial term of 12 months or less within its Consolidated Balance Sheets and to 
recognize those lease payments on a straight-line basis in its Consolidated Statements of Operations and Comprehensive Loss 
over the lease term. Operating lease assets represent the Company's right to use an underlying asset for the lease term and 
operating lease liabilities represent its obligation to make lease payments arising from the lease. Operating lease assets and 
liabilities are recognized at the commencement date of the lease based upon the present value of lease payments over the lease 
term. When determining the lease term, the Company includes options to extend or terminate the lease when it is reasonably 
certain that the Company will exercise that option. 
As the Company's lease does not provide an implicit interest rate, the Company uses its incremental borrowing rate, which 
is based on rates that would be incurred to borrow on a collateralized basis over a term equal to the lease payments in a similar 
economic environment, in determining the present value of lease payments.
The lease payment used to determine the operating lease asset may include lease incentives, stated rent increases and was 
recognized as an operating lease right-of-use asset in the Consolidated Balance Sheets. The Company's lease agreements may 
include both lease and non-lease components, which may be accounted for as a single lease component when the payments are 
fixed. Variable payments included in the lease agreement are expensed as incurred. 
The Company's operating lease is reflected in operating lease right-of-use asset and operating lease liability in the 
Consolidated Balance Sheets. Lease expense for lease payments is recognized on a straight-line basis over the lease term. 
(g)
Other assets
Other assets consist of long-term prepayments and deposits.
(h)
Goodwill 
The Company had goodwill of $9.0 million as of both December 31, 2024 and 2023. The Company applies the guidance 
in the FASB Codification Topic 350, Intangibles—Goodwill and Other. The Company performs its annual goodwill assessment 
as of December 31. As part of its annual goodwill assessment, the Company determined (1) it operates as a single reporting unit 
and (2) the fair value of the Company exceeded the carrying value of its net assets. Accordingly, no goodwill impairment was 
recognized for each of the years ended December 31, 2024 and 2023, and there have been no cumulative impairments.
(i)
Revenue Recognition 
The Company applies the revenue recognition guidance in accordance with FASB Codification Topic 606, Revenue from 
Contracts with Customers. 
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The Company recognizes royalty revenues related to Genentech’s and Roche’s sales of Erivedge. For arrangements that 
include sales-based royalties, including milestone payments based on the level of sales, and where the license is deemed to be 
the predominant item to which the royalties relate, the Company recognizes revenue at the later of (i) when the related sales 
occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or 
partially satisfied). The Company expects to continue recognizing royalty revenue from Genentech’s sales of Erivedge in the 
U.S. and Roche's sales of Erivedge outside of the U.S. (see Note 10, Research and Development Collaborations). However, a 
significant portion of Erivedge royalties will be paid to the Purchasers pursuant to the Oberland Purchase Agreement (see Note 
8, Liability Related to the Sale of Future Royalties).
(j)
Research and Development
The Company expenses research and development costs as they are incurred. Research and development expense 
primarily consists of costs incurred to discover, research and develop emavusertib. These expenses primarily include: (1) 
salaries and related expenses for personnel, including stock-based compensation expense; (2) external research and 
development costs, including amounts paid to clinical centers, clinical research organizations and consultants, costs of contract 
manufacturing, and the cost of companion drugs; (3) regulatory costs; (4) facility costs; and (5) certain payments that we make 
under the Company's collaboration agreements. 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 prepaid amounts are expensed as the related goods 
are delivered or the services are performed.
(k)
External Research and Development Costs 
The Company has entered into various research and development contracts with clinical research organizations, clinical 
manufacturing organizations, and other service providers both inside and outside of the United States. These agreements are 
generally cancellable. The Company recognizes external research and development costs based on an evaluation of the level of 
activity and services performed, using information provided to the Company by its service providers. This process involves 
reviewing vendor invoices, open contracts and purchase orders, communicating with applicable personnel to identify services 
that have been performed on the Company’s behalf, and estimating the level of service performed and the associated cost 
incurred for the service when the Company has not yet been invoiced or otherwise notified of actual costs.
(l)
Basic and Diluted Loss per Common Share
Basic and diluted net losses per share were determined by dividing net loss by the weighted average number of common 
shares outstanding during the period. Diluted net loss per common share is the same as basic net loss per common share for all 
periods presented, as the effect of the potential common stock equivalents is antidilutive due to the Company’s net loss position 
for all periods presented. Antidilutive securities consist of stock options outstanding of 1,160,251 and 840,880 as of December 
31, 2024 and 2023, respectively, unvested restricted stock awards of 40,137 and 110,500 as of December 31, 2024 and 2023, 
respectively and warrants of 2,398,414 as of December 31, 2024. 
(m)
Stock-Based Compensation
The Company accounts for stock-based compensation transactions using a grant-date fair-value based method under 
FASB Codification Topic 718, Compensation-Stock Compensation.
The Company measures compensation cost for stock-based compensation at fair value and recognizes the expense as 
compensation expense over the period that the recipient is required to provide service in exchange for the award, which 
generally is the vesting period. The fair value for restricted stock awards is based on the closing share price of the Company's 
common stock on the date of grant. The Company uses the Black-Scholes option pricing model to measure the fair value of 
stock options. This model requires estimates related to the award’s expected life and future stock price volatility of the 
underlying equity security. Actual compensation expense recognized over the vesting period will only be for those shares that 
vest.
The expected volatility is based on the annualized daily historical volatility of the Company’s stock price for a time period 
consistent with the expected term of each grant. Management believes that the historical volatility of the Company’s stock price 
best represents the future volatility of the stock price. The risk-free rate is based on the U.S. Treasury yield in effect at the time 
of grant for the expected term of the respective grant. The expected term is based on historical data. The Company has not 
historically paid cash dividends, and does not expect to pay cash dividends in the foreseeable future. 
(n)
Comprehensive Loss
Comprehensive loss is comprised of net loss and other comprehensive income (loss). Other comprehensive income (loss) 
includes unrealized gains and losses arising during the period on available-for-sale securities.
(o)
Segment Reporting
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The Company has determined that it operates in a single reportable segment, which is the research and development of 
innovative drug candidates for the treatment of human cancer. See Note 14, Segment Information.
(p)
Interest Expense on Liability related to the Sale of Future Royalties
In March 2019 the Company entered into the Oberland Purchase Agreement. Pursuant to the terms of the Oberland 
Purchase Agreement the Company sold to the Purchasers a portion of its rights to receive royalties from Genentech on potential 
net sales of Erivedge. As a result of the obligation to pay future royalties to the Purchasers, the Company recorded the proceeds 
as a liability in its Consolidated Balance Sheet that is accounted for using the interest method over the expected life of the 
Oberland Purchase Agreement. As a result, the Company imputes interest on the transaction and records imputed interest 
expense at the estimated interest rate. The Company's estimate of the interest rate under the Oberland Purchase Agreement is 
based on the amount of royalty payments expected to be received by the Purchasers over the life of the arrangement. 
(q)
Warrants
The Company accounts for warrants to purchase shares of its common stock in accordance with the guidance in FASB 
Codification Topic 480, Distinguishing Liabilities from Equity (“ASC 480”) and FASB Codification Topic 815, Derivatives 
and Hedging (“ASC 815”). The Company classifies warrants issued for the purchase of shares of its common stock as either 
equity or liability instruments based on an assessment of the specific terms and conditions of the contract. The assessment 
considers whether the warrants are freestanding financial instruments or embedded in a host instrument, and whether the 
warrants meet the definition of a liability pursuant to ASC 480, and whether the warrants meet all of the requirements for equity 
classification under ASC 815. For warrants that meet all of the criteria for equity classification, the warrants are recorded as a 
component of equity without subsequent remeasurement at the time of issuance. 
(r)
New Accounting Pronouncements
Recently Adopted
In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable 
Segment Disclosures, which provides updates to qualitative and quantitative reportable segment disclosure requirements, 
including enhanced disclosures about significant segment expenses and increased interim disclosure requirements, among 
others. ASU No. 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods in fiscal years 
beginning after December 15, 2024. The Company adopted this ASU for the fiscal year beginning January 1, 2024. See Note 
14, Segment Information.
Issued, Not Yet Adopted
In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax 
Disclosures, which requires disclosure of disaggregated income taxes paid, prescribes standard categories for the components of 
the effective tax rate reconciliation, and modifies other income tax-related disclosures. ASU No. 2023-09 is effective for fiscal 
years beginning after December 15, 2024 and allows for adoption on a prospective basis, with a retrospective option. Early 
adoption is permitted. The Company is currently evaluating the impact of the ASU on the income tax disclosures within the 
Consolidated Financial Statements.
In November 2024, the FASB issued ASU-2024-03, Income Statement—Reporting Comprehensive Income—Expense 
Disaggregation Disclosures (Topic 220): Disaggregation of Income Statement Expenses. The ASU requires additional 
disclosures of the nature of the expenses included in the income statement, including disaggregation of the expense captions 
presented on the Consolidated Statements of Operations into specific categories. ASU No. 2024-03 is effective for fiscal years 
beginning after December 15, 2026, and for interim periods beginning after December 15, 2027 and allows for adoption on a 
prospective basis, with a retrospective option. Early adoption is permitted. The Company is currently evaluating the impact of 
the ASU on the Consolidated Financial Statement disclosures.
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103

(3)
 Fair Value of Financial Instruments
The Company applies the provisions of FASB Codification 820, Fair Value Measurements (“ASC 820”) for its financial 
assets and liabilities that are re-measured and reported at fair value each reporting period and the non-financial assets and 
liabilities that are re-measured and reported at fair value on a non-recurring basis. Fair value is the price that would be received 
from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement 
date. When determining fair value, the Company considers the principal or most advantageous market in which it would 
transact and considers assumptions that market participants would use when pricing the asset or liability. ASC 820 establishes a 
three-level valuation hierarchy for disclosure of fair value measurements. Financial assets and liabilities are categorized within 
the valuation hierarchy based upon the lowest level of input that is significant to the measurement of fair value. The three levels 
of the hierarchy are defined as follows:
Level 1
Quoted 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.
In accordance with the fair value hierarchy, the following tables show the fair value as of December 31, 2024 and 2023 of 
those financial assets and liabilities that are measured at fair value on a recurring basis, according to the valuation techniques 
the Company used to determine their fair value. 
Quoted Prices in
Active Markets
(Level 1)
Other
Observable
Inputs
(Level 2)
Unobservable
Inputs
(Level 3)
Fair Value
(in thousands)
As of December 31, 2024
Assets:
Cash equivalents:
Money market funds
$ 
17,201 $ 
— $ 
— $ 
17,201 
Total
$ 
17,201 $ 
— $ 
— $ 
17,201 
Quoted Prices in
Active Markets
(Level 1)
Other
Observable
Inputs
(Level 2)
Unobservable
Inputs
(Level 3)
Fair Value
(in thousands)
As of December 31, 2023
Assets:
Cash equivalents:
Money market funds
$ 
16,780 $ 
— $ 
— $ 
16,780 
U.S. treasury securities and government agency 
obligations
 
—  
4,735  
—  
4,735 
Corporate debt securities and commercial paper
 
—  
2,021  
—  
2,021 
Short-term investments:
Corporate debt securities and commercial paper
 
—  
12,996  
—  
12,996 
U.S. treasury securities and government agency 
obligations
 
—  
16,657  
—  
16,657 
Total
$ 
16,780 $ 
36,409 $ 
— $ 
53,189 
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104

(4)
Investments
As of December 31, 2024, all of the Company's investments have matured.
The amortized cost, unrealized gains and losses and fair value of investments available-for-sale as of December 31, 2023 
are as follows:
(in thousands)
Amortized
Cost
Unrealized
Gain
Unrealized
Loss
Fair Value
Short-term investments:
Corporate debt securities and commercial paper
$ 
12,999 $ 
— $ 
(3) $ 
12,996 
U.S. treasury securities and government agency 
obligations
 
16,655  
3  
(1)  
16,657 
Total investments
$ 
29,654 $ 
3 $ 
(4) $ 
29,653 
The weighted average remaining maturity of short-term investments was 0.2 years at December 31, 2023.
No credit losses on available-for-sale securities were recognized during the year ended December 31, 2023. In its 
evaluation to determine expected credit losses, management considered all available historical and current information, 
expectations of future economic conditions, the type of security, the credit rating of the security, and the size of the loss 
position, as well as other relevant information. As of December 31, 2024, all of the Company's investments have matured.
As of December 31, 2023, the Company held no investments that have been in a continuous unrealized loss position for 
12 months or longer.
(5)
Property and Equipment, Net
Property and equipment consisted of the following:
December 31,
(in thousands)
2024
2023
Laboratory equipment, computers and software
$ 
77 $ 
1,140 
Leasehold improvements
 
257  
257 
Office furniture and equipment
 
910  
1,028 
 
1,244  
2,425 
Less—Accumulated depreciation and amortization
 
(1,013)  
(1,991) 
Property and equipment, net
$ 
231 $ 
434 
Depreciation and amortization expense related to property and equipment was $0.2 million and $0.3 million for the years 
ended December 31, 2024 and 2023, respectively.
(6)
Accrued Liabilities
Accrued liabilities consisted of the following:
December 31,
(in thousands)
2024
2023
Employee related costs
$ 
3,255 $ 
3,701 
Research and development costs
 
3,049  
4,163 
Professional and legal fees
 
771  
1,059 
Other
 
36  
117 
Total
$ 
7,111 $ 
9,040 
(7)
Leases and Commitments
(a)
Operating Leases
The Company has a single lease for real estate, including laboratory and office space, and certain equipment, located at 
128 Spring Street in Lexington, Massachusetts which commenced on May 1, 2020.
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A portion of the Company’s leased space is subject to an early termination option that becomes effective on the lease 
commencement date of a new lease for larger premises within the landlord’s commercial real estate portfolio. The landlord had 
the option to early terminate the lease agreement by providing written notice to the Company eighteen months prior to 
December 31, 2025, or by June 30, 2024. The Company previously expected the lease to end as of December 31, 2025, and the 
Company no longer expects the lease to end early, which was accounted for as a lease modification. The lease will expire on 
April 30, 2027. During the year ended December 31, 2024, the Company recognized an increase of $1.4 million to the lease 
liability and right-of-use asset as a result of the lease modification.
The discount rate associated with the Company’s right-of-use asset is 10%. The total cash obligation for the base rent over 
the seven-year term of this lease is approximately $10.5 million, of which $1.5 million was paid during the year ended 
December 31, 2024.
The Company's lease is an operating lease. The following table summarizes the presentation in the Company's 
Consolidated Balance Sheet for the operating lease:
December 31,
(in thousands)
2024
2023
Assets:
Operating lease right-of-use asset
$ 
3,163 $ 
3,056 
Liabilities:
Operating lease liability - short-term
$ 
1,336 $ 
1,305 
Operating lease liability - long-term
 
1,618  
1,489 
Total operating liability
$ 
2,954 $ 
2,794 
The following table summarizes the effect of lease costs in our Consolidated Statements of Operations and 
Comprehensive Loss:
For the Year Ended December 31,
(in thousands)
2024
2023
Operating lease cost
Research and development
$ 
844 $ 
483 
General and administrative
 
722  
1,182 
Total
$ 
1,566 $ 
1,665 
The Company’s lease payments through the end of the expected lease term are expected to be as follows:
Year Ending December 31,
(in thousands)
2025
 
1,558 
2026
 
1,287 
2027
 
433 
Total lease payments
$ 
3,278 
Less: interest
 
324 
Present value of operating lease liabilities
$ 
2,954 
(b)
License and Funding Agreements
In exchange for the right to use licensed technology in its research and development efforts, the Company has entered into 
various license agreements and funding agreements. These license agreements generally stipulate that the Company is obligated 
to pay royalties on future revenues, if any, resulting from use of the underlying licensed technology. Such revenues may include 
up-front license fees, contingent payments upon collaborators’ achievement of development and regulatory objectives, and 
royalties. In addition, some of the agreements commit the Company to make contractually defined payments upon the 
attainment of scientific or clinical milestones. The Company expenses these payments as they are incurred and expenses royalty 
payments as related future product sales or as royalty revenues are recorded. The Company accrues expenses for scientific and 
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clinical objectives over the period that the work required to meet the respective objective is completed, provided that the 
Company believes that the achievement of such objective is probable. 
(8)
Liability Related to the Sale of Future Royalties
In March 2019, the Company and Curis Royalty entered into the royalty interest purchase agreement (“Oberland 
Purchase Agreement”) with TPC Investments I LP and TPC Investments II LP ("the Purchasers"), each of which is a Delaware 
limited partnership managed by Oberland Capital Management, LLC, and Lind SA LLC, a Delaware limited liability company 
managed by Oberland Capital Management, LLC, as collateral agent for the Purchasers. The Company sold to the Purchasers a 
portion of its rights to receive royalties from Genentech on potential net sales of Erivedge. Concurrently with the closing of the 
Oberland Purchase Agreement, Curis Royalty used a portion of the proceeds to terminate and repay the then existing loan with 
Healthcare Royalty Partners III, L.P.
As upfront consideration for the purchase of the royalty rights, the Purchasers paid to Curis Royalty $65.0 million less 
certain transaction expenses. Curis Royalty will also be entitled to receive up to $53.5 million in milestone payments based on 
sales of Erivedge if the Purchasers receive payments pursuant to the Oberland Purchase Agreement in excess of $117.0 million 
on or prior to December 31, 2026.
The Oberland Purchase Agreement provides that after the occurrence of an event of default as defined under the security 
agreement by Curis Royalty, the Purchasers shall have the option, for a period of 180 days, to require Curis Royalty to 
repurchase a portion of certain royalty and royalty related payments, excluding a portion of non-U.S. royalties retained by Curis 
Royalty ("Purchased Receivables"), at a price (the "Put/Call Price") equal to 250% of the sum of the upfront purchase price and 
any portion of the milestone payments paid in a lump sum by the Purchasers, if any, minus certain payments previously 
received by the Purchasers with respect to the Purchased Receivables. The Company concluded the put option is an embedded 
derivative that requires bifurcation from the deferred royalty obligation and evaluates the fair value of the put option each 
reporting period. The estimated fair value of the put option is immaterial as of both December 31, 2024 and 2023. Additionally, 
Curis Royalty shall have the option at any time to repurchase the Purchased Receivables at the Put/Call Price as of the date of 
such repurchase. No events of default occurred as of December 31, 2024.
As a result of the obligation to pay future royalties to the Purchasers, the Company recorded the proceeds as a liability on 
its Consolidated Balance Sheets. It accounts for the liability and interest expense using the interest method over the expected 
life of the Oberland Purchase Agreement. As a result, the Company imputes interest on the transaction and records imputed 
interest expense at the estimated interest rate. The Company's estimate of the interest rate under the Oberland Purchase 
Agreement is based on the amount of royalty payments expected to be received by the Purchasers over the life of the Oberland 
Purchase Agreement. The projected amount of royalty payments expected to be paid to the Purchasers involves the use of 
significant estimates and assumptions with respect to the revenue growth rate in the Company's projections of sales of Erivedge. 
The Company periodically assesses the expected royalty payments to Curis Royalty from Genentech using a combination of 
historical results and forecasts from market data sources. To the extent such payments are greater or less than its estimates or 
the timing of such payments is materially different than its original estimates, the Company will prospectively adjust the 
amortization of the liability. 
The Company determined the fair value of the liability related to the sale of future royalties at the time of the Oberland 
Purchase Agreement to be $65.0 million. The Company uses the prospective method to impute interest on this obligation. 
Under the prospective method, the current effective annual imputed interest rate is 6.2% as of December 31, 2024. The carrying 
value of the liability related to the sale of future royalties approximates fair value as of December 31, 2024. The Company 
incurred $0.6 million of transaction costs in connection with the Oberland Purchase Agreement. These transaction costs will be 
amortized to imputed interest expense over the estimated term of the Oberland Purchase Agreement.
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107

The following table shows the activity with respect to the liability related to the sale of future royalties during the years 
ended December 31, 2023 and 2024:
(in thousands)
Carrying value of liability related to the sale of future royalties at January 1, 2023
$ 
49,483 
Imputed interest expense
 
2,138 
Other
 
(119) 
Less: payments to the Purchasers
 
(8,896) 
Carrying value of liability related to the sale of future royalties at December 31, 2023
$ 
42,606 
Imputed interest expense
 
559 
Other
 
56 
Less: payments to the Purchasers
 
(9,047) 
Carrying value of liability related to the sale of future royalties at December 31, 2024
$ 
34,174 
The Company has revised the balance sheet classification of the liability related to the sale of future royalties, net to adjust 
for an immaterial reclassification of the presentation of this liability between long term and short term. A summary of 
adjustments as of December 31, 2023 are as follows:
As Previously 
reported
Adjustment
As Revised
December 31, 2023
Current portion of liability related to sale of future royalties
 
—  
8,504  
8,504 
Liability related to sale of future royalties, net
 
42,606  
(8,504)  
34,102 
The revisions increased total current liabilities by the amounts noted above and have no impact on total liabilities for any 
of the periods presented. The revisions did not impact the Consolidated Statement of Operations and Comprehensive Loss, the 
Consolidated Statement of Cash Flows, or the Consolidated Statement of Stockholders' Equity (Deficit). 
(9)
Common Stock
(a)
Charter Amendments 
In September 2023, the Company's stockholders approved an increase to the number of authorized shares of its common 
stock from 11,390,625 shares to 22,781,250 shares.
In May 2024, the Company's stockholders approved an increase to the number of authorized shares of its common stock 
from 22,781,250 shares to 34,171,875 shares.
(b)
Sales Agreement with Cantor Fitzgerald & Co. and JonesTrading Institutional Services LLC
In February 2024, the Company entered into an amended and restated sales agreement with Cantor Fitzgerald & Co. 
(“Cantor”) and JonesTrading Institutional Services LLC (“JonesTrading”) (the “2024 Sales Agreement”). Pursuant to the 2024 
Sales Agreement, the Company can sell from time to time up to $100.0 million shares of the Company’s common stock through 
an “at-the-market offering” program under which Cantor and JonesTrading act as sales agents. Subject to the terms and 
conditions of the 2024 Sales Agreement, Cantor and JonesTrading can sell the common stock by any method deemed to be an 
“at-the-market” offering as defined in Rule 415 promulgated under the Securities Act of 1933, as amended.
Pursuant to the terms of the 2024 Sales Agreement, the aggregate compensation payable to each of Cantor and 
JonesTrading is 3% of the gross proceeds from sales of the common stock sold by Cantor or JonesTrading, as applicable. The 
Company sold 188,316 shares of common stock under the 2024 Sales Agreement representing gross proceeds of $1.2 million 
during the year ended December 31, 2024. As of December 31, 2024, $98.8 million of shares of common stock remained 
available for sale under the 2024 Sales Agreement.
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108

(c)
2023 Registered Direct Offering
In July 2023, the Company sold and issued, in a registered direct offering (the “July Registered Direct”) to certain 
institutional investors, an aggregate of 920,488 shares of common stock at a purchase price per share of $16.40 per share for net 
proceeds of approximately $13.8 million.
(d)
October 2024 Offerings
In October 2024, the Company entered into a securities purchase agreement with certain institutional investors, pursuant 
to which the Company issued and sold: (i) in a registered direct offering, 2,398,414 shares of the Company's common stock and 
(ii) in a concurrent private placement, warrants to purchase up to an aggregate of 2,398,414 shares of the Company's common 
stock (the “Warrants”), at an exercise price of $4.92 per share. The registered direct offering and concurrent private placement 
are collectively referred to as the "October 2024 Offerings". The Warrants were exercisable immediately upon closing on 
October 30, 2024 and will expire five years following the issuance date. The combined purchase price for one share of common 
stock and the associated Warrant was $5.045. The net proceeds to the Company from the October 2024 Offerings were 
approximately $10.8 million, excluding the proceeds from any exercise of the Warrants.
The Company concluded the Warrants meet the equity scope exception under ASC 815-40. The total net proceeds were 
allocated to common stock and the Warrants based on the relative fair value. The relative fair value of the common stock and 
Warrants were $6.0 million and $4.8 million, respectively. 
The Company calculated the fair value of the Warrants using the Black-Scholes option pricing model with the following 
weighted average inputs:
October 28 , 
2024 (Issuance 
Date)
Stock price
$4.92
Expected term (years)
4.78
Risk-free interest rate
4.1%
Expected volatility
117%
Expected dividend yield
None
(e)
March 2025 Offerings
In March 2025, the Company entered into a securities purchase agreement with certain institutional investors, pursuant to 
which the Company agreed to sell and issue: (i) in a registered direct offering, 1,974,432 shares of the Company’s common 
stock and (ii) in a concurrent private placement, (a) in lieu of shares to certain investors, unregistered pre-funded warrants to 
purchase up to an aggregate of 2,184,009 shares of common stock (the “Pre-Funded Warrants”), at an exercise price of $0.01 
per share, and (b) unregistered warrants (the “Common Warrants” and together with the Pre-Funded Warrants, the 
“Unregistered Warrants”) to purchase up to an aggregate of 8,316,882 shares of common stock, at an exercise price of $2.41 per 
share. Each Common Warrant will be exercisable beginning on the effective date of stockholder approval of the issuance of the 
shares of Common Stock upon exercise of the Common Warrants and will have a term of five years from the date of issuance. 
Each Pre-Funded Warrant will be exercisable immediately upon issuance and continuing through and including the date the 
Pre-Funded Warrant is exercised in full. The combined purchase price for one share of the Company's common stock and the 
associated Common Warrant is $2.41. The combined purchase price for one Pre-Funded Warrant and the associated Common 
Warrant is $2.40. The aggregate gross proceeds to the Company from the Offerings were approximately $10.0 million, before 
deducting fees payable to the placement agent, advisory fees and other estimated offering expenses payable by the Company, 
and excluding the proceeds from any exercise of the Unregistered Warrants. 
(10) Research and Development Collaborations
(a)
Genentech
In June 2003, the Company licensed its proprietary Hedgehog pathway antagonist technologies to Genentech for human 
therapeutic use. The primary focus of the collaborative research plan has been to develop molecules that inhibit the Hedgehog 
pathway for the treatment of various cancers. The collaboration is currently focused on the development of Erivedge, which is 
being commercialized by Genentech in the U.S. and by Genentech's parent company, Roche, outside of the U.S. for the 
treatment of advanced BCC. Pursuant to the collaboration agreement, the Company is eligible to receive up to an aggregate of 
$115.0 million in contingent cash milestone payments, exclusive of royalty payments, in connection with the development of 
Erivedge or another small molecule Hedgehog pathway inhibitor, assuming the successful achievement by Genentech and 
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109

Roche of specified clinical development and regulatory objectives. Of this amount, the Company has received $59.0 million in 
cash milestone payments as of December 31, 2024.
In addition to these payments and pursuant to the collaboration agreement, the Company is entitled to a royalty on net 
sales of Erivedge that ranges from 5% to 7.5%. The royalty rate applicable to Erivedge may be decreased by 2% on a country-
by-country basis in certain specified circumstances.
The Company recognized $10.9 million and $9.9 million in royalty revenues under the Genentech collaboration during 
the years ended December 31, 2024 and 2023, respectively. Cost of royalties comprises payments to university licensors and 
was not material for the years ended December 31, 2024 and 2023.
The Company has accounts receivable from Genentech under this collaboration of $3.3 million and $2.7 million as of 
December 31, 2024 and 2023, respectively, in its Consolidated Balance Sheets.
As further discussed in Note 8, Liability Related to the Sales of Future Royalties, a significant portion of royalty revenues 
received from Genentech on net sales of Erivedge will be paid to the Purchasers pursuant to the Oberland Purchase Agreement. 
(b)
Aurigene
In January 2015, the Company entered into an exclusive collaboration agreement with Aurigene for the discovery, 
development and commercialization of small molecule compounds in the areas of immuno-oncology and selected precision 
oncology targets. Under the collaboration agreement, Aurigene granted the Company an option to obtain exclusive, royalty-
bearing licenses to relevant Aurigene technology to develop, manufacture and commercialize products containing certain of 
such compounds anywhere in the world, except for India and Russia, which are territories retained by Aurigene.
In September 2016, the Company and Aurigene entered into an amendment to the collaboration agreement. Under the 
terms of the amendment, in exchange for the issuance of shares of the Company's common stock, Aurigene waived payment of 
up to a total of $24.5 million in potential milestones and other payments associated with the first four programs in the 
collaboration that may have become due from the Company under the collaboration agreement. To the extent any of these 
waived milestones or other payments are not payable by the Company, for example in the event one or more of the milestone 
events do not occur, the Company will have the right to deduct the unused waived amount from any one or more of the 
milestone payment obligations tied to achievement of commercial milestone events. The amendment also provides that, in the 
event supplemental program activities are performed by Aurigene, the Company will provide up to $2.0 million of additional 
funding for each of the two licensed programs besides the IRAK4 licensed program.
In February 2020, the Company and Aurigene further amended their collaboration agreement. Under the terms of the 
amended agreement, Aurigene expanded their rights to develop and commercialize CA-170 to Asia and will conduct a Phase 
2b/3 randomized study evaluating CA-170, in combination with chemoradiation, in approximately 240 patients with non-
squamous non-small cell lung cancer. In September 2024, the collaboration agreement was further amended to expand 
Aurigene's rights to develop and commercialize CA-170 worldwide. The Company is entitled to receive royalty payments on 
potential future sales of CA-170 at percentage rates ranging from the high single digits up to 10%, subject to specified 
reductions. In addition, the Company is entitled to receive a low double-digit percentage of Aurigene’s sublicensing revenues 
subject to specified reductions. 
As of December 31, 2024, the Company has licensed the following programs under the collaboration:
•
IRAK4 Program - a precision oncology program of small molecule inhibitors of IRAK4. The development 
candidate is emavusertib.
•
PD1/TIM3 Program - an immuno-oncology program of small molecule antagonists of PD1 and TIM3 immune 
checkpoint pathways. The development candidate is CA-327.
•
An immuno-oncology program.
For each of the IRAK4, PD1/TIM3, and the immuno-oncology programs the Company is obligated to use commercially 
reasonable efforts to develop, obtain regulatory approval for, and commercialize at least one product in each of the U.S., 
specified countries in the European Union and Japan. Aurigene is obligated to use commercially reasonable efforts to perform 
its obligations under the development plan for its licensed programs.
For each of the IRAK4, PD1/TIM3, and the immuno-oncology programs, the Company has remaining unpaid or 
unwaived payment obligations of $42.5 million per program, related to regulatory approval and commercial sales milestones, 
plus specified additional payments for approvals for additional indications, if any.
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110

(11)  Stock Plans and Stock-Based Compensation
As of December 31, 2024, the Company had two shareholder-approved, stock-based compensation plans: (i) the Fifth 
Amended and Restated 2010 Stock Incentive Plan (“2010 Plan”) and (ii) the Amended and Restated 2010 Employee Stock 
Purchase Plan, (“ESPP”). New employees are generally issued options as an inducement equity award under Nasdaq Listing 
Rule 5635(c)(4) outside of the 2010 Plan (“Inducement Awards”). 
The Fifth Amended and Restated 2010 Stock Incentive Plan
The 2010 Plan permits the granting of incentive and non-qualified stock options and stock awards to employees, officers, 
directors, and consultants of the Company and its subsidiaries at prices determined by the Company’s board of directors. In 
May 2024, the Company's stockholders approved the amendment and restatement of the 2010 Plan to reserve an additional 
942,100 shares of common stock for issuance under the 2010 Plan. The Company can issue up to 2,101,600 shares of its 
common stock pursuant to awards granted under the 2010 Plan. Options vest and become exercisable based on a schedule 
determined by the board of directors and expire up to ten years from the date of grant. The 2010 Plan uses a “fungible share” 
concept under which each share of stock subject to awards granted as options and stock appreciation rights (“SARs”), will 
cause one share per share under the award to be removed from the available share pool, while each share of stock subject to 
awards granted as restricted stock, restricted stock units, other stock-based awards or performance awards where the price 
charged for the award is less than 100% of the fair market value of the Company’s common stock will cause 1.3 shares per 
share under the award to be removed from the available share pool. As of December 31, 2024, the Company has only granted 
options to purchase shares of the Company’s common stock with an exercise price equal to the closing market price of the 
Company’s common stock on the Nasdaq Capital Market on the grant date and issued restricted stock awards at no cost to 
Company employees, excluding officers. 
During the year ended December 31, 2024, the Company’s board of directors granted options to purchase 457,670 shares 
of the Company’s common stock to officers and employees of the Company under the 2010 Plan. These options vest and 
become exercisable as to 25% of the shares underlying the award after the first year and as to an additional 6.25% of the shares 
underlying the award in each subsequent quarter, based upon continued employment over a four-year period, and are 
exercisable at a price equal to the closing price of the Company’s common stock on the grant date. 
During the year ended December 31, 2024, the Company’s board of directors granted options to its non-employee 
directors to purchase 21,250 shares of common stock under the 2010 Plan, which will vest and become exercisable in one year 
from the date of grant. These options were granted at an exercise price that equaled the closing market price of the Company’s 
common stock on the grant date.
During the year ended December 31, 2023, the Company’s board of directors granted restricted stock awards ("RSAs"), 
for an aggregate amount of 117,000 shares to the employees of the Company, excluding officers, under the 2010 Plan. These 
RSAs vest as to 50% of the shares underlying the award on the first anniversary of the date of the grant and 50% after the 
second anniversary, based upon continued employment.
As of December 31, 2024, 912,598 shares remained available for grant under the 2010 Plan.
Inducement Awards
The Company grants Inducement Awards to certain new employees. These options generally vest as to 25% of the shares 
underlying the option on the first anniversary of the grant date, and as to an additional 6.25% of the shares underlying the 
option on each successive quarter thereafter. During the year ended December 31, 2024, the Company’s board of directors 
granted Inducement Awards to purchase 39,350 shares of common stock. These options were granted at an exercise price that 
equaled the closing market price of the Company’s common stock on grant date.
Stock Options
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111

A summary of stock option activity under the 2010 Plan and Inducement Awards are summarized as follows:
Number of
Options
Weighted
Average
Exercise
Price per
Share
Weighted
Average
Remaining 
Contractual 
Life
Aggregate 
Intrinsic 
Value 
(000's)
Outstanding, December 31, 2023
 
840,880 $ 
47.58 
7.16
$ 
91 
Granted
 
518,270  
11.39 
Exercised
 
—  
— 
Canceled
 
(198,899)  
45.82 
Outstanding, December 31, 2024
 1,160,251 $ 
33.44 
7.19
$ 
— 
Exercisable at December 31, 2024
 
575,688 $ 
55.36 
5.50
$ 
— 
Vested and unvested expected to vest at December 31, 2024
 1,160,251 $ 
33.44 
7.19
$ 
— 
The weighted average grant date fair values of stock options granted during the years ended December 31, 2024 and 2023 
were $9.50 and $11.70, respectively, and were calculated using the following estimated assumptions under the Black-Scholes 
option pricing model:
For the Year Ended
December 31,
2024
2023
Expected term (years)
6.0
5.5
Risk-free interest rate
3.9-4.5%
3.5-4.7%
Expected volatility
114-116%
115-116%
Expected dividend yield
None
None
As of December 31, 2024, there was approximately $5.7 million of unrecognized compensation cost related to unvested 
employee stock option awards outstanding, which is expected to be recognized as expense over a weighted average period of 
2.3 years. There were no employee stock options exercised during the year ended December 31, 2024.
Restricted Stock Awards
The following table presents a summary of outstanding RSAs under the 2010 Plan as of December 31, 2024:
Number of
Shares
Weighted
Average
Grant Date 
Fair Value
Unvested, December 31, 2023
 
110,500 $ 
18.20 
Awarded
 
—  
— 
Vested
 
(65,988)  
18.20 
Forfeited
 
(4,375)  
18.20 
Unvested, December 31, 2024
 
40,137 $ 
18.20 
As of December 31, 2024, there were 40,137 shares outstanding underlying RSAs that are expected to vest. As of 
December 31, 2024, there was $0.3 million of unrecognized compensation costs related to RSAs, which are expected to be 
recognized as expense over a remaining weighted average period of 0.4 years. The fair value of RSAs that vested during the 
year ended December 31, 2024 was $1.0 million. There were no RSAs that vested during the year ended December 31, 2023. 
The weighted average grant date fair value of RSAs granted during the year ended December 31, 2023 was $18.20.
Amended and Restated 2010 Employee Stock Purchase Plan
In May 2024, the Company's stockholders approved an amendment to the ESPP to reserve an additional 400,000 shares of 
common stock for issuance under the ESPP. The Company has reserved 500,000 shares of common stock for issuance under 
the ESPP. Eligible employees may purchase shares of the Company’s common stock at 85% of the lower closing market price 
of the common stock at the beginning of the enrollment period or ending date of the any purchase period within a two-year 
enrollment period, as defined. The Company has four six-month purchase periods per each two-year enrollment period. If, 
within any one of the four purchase periods in an enrollment period, the purchase period ending stock price is lower than the 
stock price at the beginning of the enrollment period, the two-year enrollment resets at the new lower stock price. During the 
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112

year ended December 31, 2024, 32,168 shares were issued under the ESPP. As of December 31, 2024, there were 394,463 
shares available for future purchase under the ESPP.
For the years ended December 31, 2024 and 2023, the Company recorded compensation expense related to its ESPP and 
calculated the fair value of shares expected to be purchased under the ESPP using the Black-Scholes model.
Stock-Based Compensation Expense
For the years ended December 31, 2024 and 2023, the Company recorded stock-based compensation expense to the 
following line items in its costs and expenses section of the Consolidated Statements of Operations and Comprehensive Loss: 
For the Year Ended December 31,
2024
2023
Research and development expenses
$ 
2,760 $ 
2,770 
General and administrative expenses
 
3,167  
3,230 
Total stock-based compensation expense
$ 
5,927 $ 
6,000 
No income tax benefits have been recorded for the years ended December 31, 2024 and 2023, as the Company has 
recorded a full valuation allowance and management has concluded that it is more likely than not that the net deferred tax assets 
will not be realized (see Note 13, Income Taxes).
(12) Retirement Savings Plan
The Company has a 401(k) retirement savings plan covering substantially all of the Company’s employees. The Company 
made matching contributions of $0.6 million during each of the years ended December 31, 2024 and 2023. 
(13) Income Taxes 
For the years ended December 31, 2024 and 2023, the Company did not record any federal or state income tax expense 
given its continued operating losses, all of which were attributable to the United States.
A reconciliation between income tax benefit and the expected tax benefit at the statutory rate for the years ended 
December 31, 2024 and 2023 are as follows:
 
For the Year Ended
December 31,
 
2024
2023
Statutory federal income tax rate
 21.0 %
 21.0 %
State income taxes, net of federal benefit
 5.9 %
 6.1 %
Research and development tax credits
 4.3 %
 3.7 %
Orphan drug tax credits
 4.4 %
 4.9 %
Expiration of NOLs/credits
 (6.1) %
 (6.3) %
Other
 (0.3) %
 1.5 %
Stock based compensation
 (1.7) %
 (2.5) %
Change in valuation allowance
 (27.5) %
 (28.4) %
Effective income tax rate
 — %
 — %
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113

The principal components of the Company’s deferred tax assets at December 31, 2024 and December 31, 2023, 
respectively, are as follows:
December 31,
2024
2023
Deferred Tax Assets:
NOL carryforwards
$ 
104,122 $ 
91,036 
Research and development tax credit carryforwards 
 
18,220  
16,973 
Orphan drug tax credit carryforwards
 
26,885  
24,983 
Depreciation and amortization
 
4,597  
5,552 
Capitalized research and development expenditures
 
41,283  
42,271 
Stock options
 
5,571  
4,857 
Accrued expenses and other
 
154  
973 
Oberland agreement
 
9,336  
11,640 
Lease liability
 
807  
763 
Total gross deferred tax asset
 
210,975  
199,048 
Valuation allowance
 
(210,112)  
(198,212) 
Net deferred tax asset
$ 
863 $ 
836 
Deferred tax liabilities:
Right of use asset
 
(863)  
(836) 
Total gross deferred tax liabilities
$ 
(863) $ 
(836) 
Net deferred tax assets (liabilities)
$ 
— $ 
— 
As of December 31, 2024, the Company had U.S. federal tax-effected net operating loss carryforwards of $84.5 million, 
of which $32.1 million will expire in years 2025 through 2037 and the remainder do not expire but are subject to 80% 
limitation. As of December 31, 2024, the Company had state net operating loss carryforwards of $19.6 million that will expire 
between years 2033 and 2044. 
As of December 31, 2024 and 2023, the Company had federal research and development credit carryforwards of $14.0 
million and $12.9 million, respectively. The credits will expire in the years 2025 through 2044. As of December 31, 2024 and 
2023, the Company had state research and development credit carryforwards of $4.2 million and $4.1 million, respectively. The 
credits will expire in the years 2025 through 2039, unless previously utilized.
As of December 31, 2024 and 2023, the Company had orphan drug tax credit carryforwards of $26.9 million and $25.0 
million, respectively. These credits, if any, relate to qualified expenses incurred for fimepinostat and emavusertib since 
receiving the Orphan Drug designation. The credits will expire in the years 2035 through 2044.
As of December 31, 2024 and 2023, the Company had deferred tax assets associated with the capitalization of Section 174 
costs of $21.8 million and $16.9 million, respectively, which were included in capitalized research and development 
expenditures in the table above.
The Company has evaluated the positive and negative evidence bearing upon the realizability of its deferred tax assets, 
and has determined that it is more likely than not that the Company will not recognize the benefits of the deferred tax assets. 
Accordingly, the Company had a valuation allowance of approximately $210.1 million and $198.2 million as of December 31, 
2024 and 2023, respectively. The valuation allowance increased approximately $11.9 million and $13.5 million during the years 
ended December 31, 2024 and 2023.
Utilization of the NOL may be subject to a substantial annual limitation under Section 382 of the Internal Revenue Code 
of 1986 due to ownership change limitations that have occurred previously or that could occur in the future. These ownership 
changes may limit the amount of NOL carryforwards that can be utilized annually to offset future taxable income and tax, 
respectively. The Company completed a §382 study in 2019 and determined no ownership changes have occurred and no 
limitation on NOLs through December 31, 2018. There could be additional ownership changes in the future, which may result 
in additional limitations in the utilization of the carryforward NOLs and credits, and the Company does not expect to have any 
taxable income for the foreseeable future.
An individual tax position must satisfy for some or all of the benefits of that position to be recognized in a company’s 
financial statements. At December 31, 2024 and 2023, the Company had no unrecognized tax benefits. The Company has not, 
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114

as yet, conducted a study of its R&D credit carryforwards. This study may result in an adjustment to the Company’s R&D 
credit carryforwards, however, until a study is completed and any adjustment is known, no amounts are being presented as an 
uncertain tax position under FASB Codification Topic 740 Income Taxes. A full valuation allowance has been provided against 
the Company’s R&D 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 Consolidated Balance Sheets or Consolidated Statements of Operations and 
Comprehensive Loss if an adjustment were required.
As of December 31, 2024, the Company is generally no longer subject to examination by taxing authorities for years prior 
to 2021. However, NOL’s and credits in the United States may be subject to adjustments by taxing authorities in future years in 
which they are utilized. The Company is currently not under examination by the IRS or any other jurisdictions for any tax 
years. The Company recognizes both accrued interest and penalties related to unrecognized benefits in income tax expense. The 
Company has not recorded any interest or penalties on any unrecognized tax benefits since its inception.
(14) Segment Information
The Company has determined that it operates in a single reportable segment, which is the research and development of 
innovative drug candidates for the treatment of human cancer. Resources are allocated and performance is assessed by the 
Company's President and Chief Executive Officer, whom the Company has determined to be its Chief Operating Decision 
Maker (CODM).
The CODM considers actual operating results on an annual basis on a consolidated basis, including consolidated net loss, 
when making decisions about allocating capital and personnel to the segment in the annual budgeting and forecasting process, 
which includes comparison of budget to actual and current period to prior period variances. The CODM assesses performance 
for the operating segment and decides, in part, how to allocate resources based on net loss that also is reported on the 
Consolidated Statement of Operations as net loss. The measure of segment assets is reported on the Consolidated Balance 
Sheets as total assets.
In addition to the significant categories included within net loss presented on the Company's Consolidated Statement of 
Operations, the following table is representative of the significant expense categories for the years ended December 31, 2024 
and 2023, including a reconciliation to Net Loss: 
For the Year Ended
December 31,
2024
2023
Revenues, net
$ 
10,908 $ 
10,023 
Direct research and development expenses
 
22,246  
23,078 
Research and development employee related costs
 
14,499  
14,330 
General and administrative employee related costs
 
8,722  
9,171 
Professional, legal, and consulting costs
 
4,810  
5,598 
Other segment items (1)
 
4,020  
5,259 
Net loss
$ 
(43,389) $ 
(47,413) 
(1) Other operating expenses for the reportable segment includes cost of royalties, facility related costs, insurance costs, and other income.
ITEM  9.
CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
FINANCIAL DISCLOSURE
None.
ITEM 9A.
CONTROLS AND PROCEDURES
Evaluation of Disclosure Controls & Procedures
Our management, with the participation of our chief executive officer and chief financial officer, evaluated the 
effectiveness of our disclosure controls and procedures as of December 31, 2024. The term “disclosure controls and 
procedures,” as defined in Rules 13a-15(e) and 15d-15(e) promulgated under the Securities Exchange Act of 1934, as amended, 
or the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to 
be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized 
and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, 
without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the 
reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, 
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115

including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required 
disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide 
only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost 
benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of 
December 31, 2024, our chief executive officer and chief financial officer concluded that, as of such date, our disclosure 
controls and procedures were effective at the reasonable assurance level.
Management’s Report on Internal Control Over Financial Reporting
Our management is responsible for establishing and maintaining adequate internal control over financial reporting. 
Internal control over financial reporting is defined in Rules 13a-15(f) or 15d-15(f) promulgated under the Exchange Act as a 
process designed by, or under the supervision of, our principal executive and principal financial officers and effected by our 
board of directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial 
reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting 
principles and includes those policies and procedures that:
•
pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and 
dispositions of our assets;
•
provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in 
accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in 
accordance with authorizations of management and our board of directors; and
•
provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of 
our assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. 
Also, projections of evaluations of effectiveness to future periods are subject to the risk that controls may become inadequate 
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2024. In 
making this assessment our management used the criteria established in Internal Control—Integrated Framework (2013) issued 
by the Committee of Sponsoring Organizations of the Treadway Commission, or COSO.
Based on our assessment, management concluded that, as of December 31, 2024, our internal control over financial 
reporting is effective based on the criteria established in Internal Control—Integrated Framework (2013) issued by COSO.
Changes in Internal Control Over Financial Reporting
There have been no changes in our internal control over financial reporting, as such term is defined in Rules 13a-15(f) and 
15d-15(f) promulgated under the Securities Exchange Act of 1934, during the fourth quarter of 2024 that have materially 
affected, or are reasonably likely to materially affect, our internal control over financial reporting.
ITEM 9B.
OTHER INFORMATION
Director and Executive Officer Trading Arrangements
During the fourth quarter of 2024, none of our directors or officers adopted or terminated any contract, instruction or 
written plan for the purchase or sale of our securities intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) 
under the Exchange Act or any “non-Rule 10b5-1 trading arrangement” (as defined in Item 408(c) of Regulation S-K).
ITEM 9C.
DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS
Not applicable. 
PART III
ITEM 10.
DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
Information concerning directors that is required by this Item 10 will be set forth in our proxy statement for our 2025 
annual meeting of stockholders, or 2025 proxy statement, under the headings “Directors and Nominees for Director,” and 
“Board Committees” which information is incorporated herein by reference. The information concerning our code of ethics will 
be set forth in our 2025 proxy statement under the heading “Code of Business Conduct and Ethics.” The information 
concerning our insider trading policy will be set forth in our 2025 proxy statement under the heading “Insider Trading Policy.” 
The name, age, position, and term of office and periods of service of each of our executive officers is set forth under the 
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116

heading “Information about our Executive Officers” in Part I of this Annual Report on Form 10-K, which information is 
incorporated herein by reference.
ITEM 11.
EXECUTIVE COMPENSATION
Information required by this Item 11 will be set forth in our 2025 proxy statement under the headings “Executive and 
Director Compensation” and “Compensation Committee Interlocks and Insider Participation” which information is incorporated 
herein by reference. Pay versus performance disclosures under the heading "Pay Versus Performance" from our 2025 proxy 
statement are not incorporated herein by reference.
ITEM 12.
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND 
RELATED STOCKHOLDER MATTERS
Information required by this Item 12 relating to security ownership of certain beneficial owners and management will be 
set forth in our 2025 proxy statement under the heading “Security Ownership of Certain Beneficial Owners and Management,” 
which information is incorporated herein by reference. Information required by this Item 12 relating to securities authorized for 
issuance under equity compensation plans will be set forth in our 2025 proxy statement under the heading “Executive and 
Director Compensation—Securities Authorized for Issuance Under Equity Compensation Plans,” which information is 
incorporated herein by reference.
ITEM 13.
CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR 
INDEPENDENCE
Information required by this Item 13 will be set forth in our 2025 proxy statement under the headings “Policies and 
Procedures for Related Person Transactions,” “Determination of Independence” and “Board Committees,” which information is 
incorporated herein by reference.
ITEM 14.
PRINCIPAL ACCOUNTANT FEES AND SERVICES
Information required by this Item 14 will be set forth in our 2025 proxy statement under the heading “Independent 
Registered Public Accounting Firm’s Fees and Other Matters,” which information is incorporated herein by reference.
PART IV
ITEM 15.
EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
(a)(1) Financial Statements.
 
Page number
in this report
Curis, Inc. and Subsidiaries
Report of Independent Registered Public Accounting Firm (PCAOB ID 238)
93
Consolidated Balance Sheets as of December 31, 2024 and 2023
95
Consolidated Statements of Operations and Comprehensive Loss for the Years Ended December 31, 
2024 and 2023
96
Consolidated Statements of Stockholders’ Equity for the Years Ended December  31, 2024 and 2023
97
Consolidated Statements of Cash Flows for the Years Ended December 31, 2024 and 2023
98
Notes to Consolidated Financial Statements
99
(a)(2) Financial Statement Schedules.
All schedules are omitted because they are not applicable or the required information is shown in the Financial 
Statements or Notes thereto.
(a)(3) List of Exhibits.
Articles of Incorporation and By-laws
3.1
Restated Certificate of Incorporation of Curis, 
Inc., as amended
Link
8-K
5/23/2024
3.1
 
 
Incorporated by Reference
Exhibit
No.
Description
Link to 
Filing
Form
SEC Filing
Date
Exhibit
Number
Filed with
this 10-K
Table of Contents
117

3.2
Certificate of Designations of Curis, Inc.
Link
S-3 (333-50906)
8/10/2001
3.2
3.3
Amended and Restated By-laws of Curis, Inc.
Link
10-K
3/13/2023
3.3
Instruments defining the rights of security 
holders, including indentures
4.1
Form of Curis Common Stock Certificate
Link
10-K
3/1/2004
4.1
4.2
Description of Registrant's Securities
Link
X
4.3
Form of Unregistered Warrant issued 
pursuant to the Securities Purchase 
Agreement, dated October 28, 2024, by and 
among Curis, Inc. and the Purchasers named 
therein
Link
8-K
10/30/2024
4.1
Material contracts—Management Contracts 
and Compensatory Plans
#10.1
Employment Agreement, dated March 29, 
2016, as amended September 24, 2018 by and 
between Curis, Inc. and James E. Dentzer.
Link
10-Q
11/1/2018
10.2
#10.2
Employment Agreement, dated August 4, 
2022, by and between Curis, Inc. and Diantha 
Duvall
Link
10-Q
11/9/2022
10.1
#10.3
Amended and Restated Employment 
Agreement, dated November 1, 2023, by and 
between Curis, Inc. and Jonathan Zung
Link
10-K
2/8/2024
10.3
#10.4
Form of Indemnification Agreement, by and 
between Curis, Inc. and each non-employee 
director of the Board of Directors of Curis, 
Inc.
Link
10-Q
8/7/2014
10.3
#10.5
Curis 2010 Stock Incentive Plan
Link
Def 14A
4/16/2010
Exhibit 
A
#10.6
Curis 2010 Employee Stock Purchase Plan
Link
Def 14A
4/16/2010
Exhibit 
B
#10.7
Form of Incentive Stock Option Agreement 
for awards granted to named executive 
officers under Curis’ 2010 Stock Incentive 
Plan
Link
8-K
6/4/2010
10.1
#10.8
Form of Non-Statutory Stock Option 
Agreement for awards granted to directors 
and named executive officers under Curis’ 
2010 Stock Incentive Plan
Link
8-K
6/4/2010
10.2
#10.9
Form of Restricted Stock Agreement for 
awards granted to directors and named 
executive officers under Curis’ 2010 Stock 
Incentive Plan
Link
8-K
6/4/2010
10.3
#10.10
Curis Amended and Restated 2010 Stock 
Incentive Plan, as amended
Link
8-K
5/28/2015
99.1
#10.11
Form of Incentive Stock Option Agreement 
for awards granted to named executive 
officers under Curis’ Amended and Restated 
2010 Stock Incentive Plan, as amended
Link
10-K
3/8/2018
10.21
#10.12
Form of Non-Statutory Stock Option 
Agreement for awards granted to directors 
and named executive officers under Curis’ 
Amended and Restated 2010 Stock Incentive 
Plan, as amended
Link
10-K
3/8/2018
10.22
 
 
Incorporated by Reference
Exhibit
No.
Description
Link to 
Filing
Form
SEC Filing
Date
Exhibit
Number
Filed with
this 10-K
Table of Contents
118

#10.13
Form of Restricted Stock Agreement for 
awards granted to directors and named 
executive officers under Curis’ Amended and 
Restated 2010 Stock Incentive Plan, as 
amended
Link
10-K
3/8/2018
10.23
#10.14
Form of Incentive Stock Option Agreement 
(Online Acceptance) for awards granted to 
named executive officers under Curis’ 
Amended and Restated 2010 Stock Incentive 
Plan
Link
10-K
3/9/2017
10.21
#10.15
Form of Nonstatutory Stock Option 
Agreement (Online Acceptance) granted to 
directors and named executive officers under 
Curis’ Amended and Restated 2010 Stock 
Incentive Plan
Link
10-K
3/9/2017
10.22
#10.16
Curis Second Amended and Restated 2010 
Stock Incentive Plan
Link
8-K
5/22/2017
99.1
#10.17
Form of Incentive Stock Option Agreement 
for awards granted to named executive 
officers under Curis’ Second Amended and 
Restated 2010 Stock Incentive Plan
Link
10-K
3/8/2018
10.27
#10.18
Form of Non-Statutory Stock Option 
Agreement for awards granted to directors 
and named executive officers under Curis’ 
Second Amended and Restated 2010 Stock 
Incentive Plan
Link
10-K
3/8/2018
10.28
#10.19
Form of Restricted Stock Agreement for 
awards granted to directors and named 
executive officers under Curis’ Second 
Amended and Restated 2010 Stock Incentive 
Plan
Link
10-K
3/8/2018
10.29
#10.20
Form of Non-Statutory Stock Option 
Agreement - Inducement Grant pursuant to 
Nasdaq Stock Market Rule 5635(c)(4)
Link
S-8
1/6/2017
99.1
#10.21
Curis Third Amended and Restated 2010 
Stock Incentive Plan, as amended
Link
8-K
6/10/2020
99.1
#10.22
Form of Incentive Stock Option Agreement 
for awards granted to named executive 
officers under Curis’ Third Amended and 
Restated 2010 Stock Incentive Plan
Link
10-K
2/24/2022
10.22
#10.23
Form of Non-Statutory Stock Option 
Agreement for awards granted to directors 
and named executive officers under Curis’ 
Third Amended and Restated 2010 Stock 
Incentive Plan
Link
X
#10.24
Curis Fourth Amended and Restated 2010 
Stock Incentive Plan
Link
8-K
6/2/2021
99.1
#10.25
Curis Amended and Restated 2010 Employee 
Stock Purchase Plan, as amended
Link
8-K
5/23/2024
10.2
#10.26
Curis Fifth Amended and Restated 2010 
Stock Incentive Plan
Link
8-K
5/23/2024
10.1
#10.27
Form of Incentive Stock Option Agreement 
for awards granted to named executive 
officers under Curis’ Fifth Amended and 
Restated 2010 Stock Incentive Plan
Link
X
 
 
Incorporated by Reference
Exhibit
No.
Description
Link to 
Filing
Form
SEC Filing
Date
Exhibit
Number
Filed with
this 10-K
Table of Contents
119

#10.28
Form of Non-Statutory Stock Option 
Agreement for awards granted to directors 
and named executive officers under Curis” 
Fifth Amended and Restated 2010 Stock 
Incentive Plan
Link
X
Material contracts—Leases
10.29
Lease, dated December 5, 2019, by and 
between Curis, Inc. and 128 Spring Street 
Lexington, LLC relating to the premises at 
128 Spring Street, Lexington, Massachusetts
Link
8-K
12/6/2019
10.1
10.30
First Amendment to Lease Agreement, dated 
January 27, 2022, by and between Curis, Inc. 
and 99 Hayden, LLC, successor-in-interest to 
128 Spring Street Lexington, LLC
Link
8-K
2/2/2022
10.1
Material contracts—Financing Agreements
10.31
Consent and Payment Direction Letter 
Agreement, dated November 20, 2012 and 
effective as of December 11, 2012 by and 
between Curis, Inc., Curis Royalty LLC and 
Genentech, Inc.
Link
10-K
3/13/2013
10.32
10.32
Consent and Payment Direction Letter 
Agreement, dated March 3, 2017 by and 
between Curis, Inc., Curis Royalty LLC and 
Genentech, Inc.
Link
10-K
3/9/2017
10.28
††10.33
Purchase and Sale Agreement, dated as of 
December 11, 2012 between Curis, Inc. and 
Curis Royalty LLC
Link
10-K
3/13/2023
10.32
†10.34
Royalty Interest Purchase Agreement, dated 
March 22, 2019, by and between, Curis, Inc., 
Curis Royalty LLC, a wholly owned 
subsidiary of Curis, Inc., TPC Investments I 
LP and TPC Investments II LP
Link
10-K
3/26/2019
10.40
10.35
Security Agreement, dated March 22, 2019, 
by and between, Curis Royalty LLC, a wholly 
owned subsidiary of Curis, Inc., TPC 
Investments I LP and TPC Investments II LP
Link
10-K
3/26/2019
10.41
10.36
Pledge Agreement, dated March 22, 2019, by 
and between, Curis, Inc., TPC Investments I 
LP and TPC Investments II LP
Link
10-K
3/26/2019
10.42
10.37
Consent and Payment Direction Letter 
Agreement, dated March 22, 2019, by and 
between Curis, Inc., Curis Royalty LLC and 
Genentech, Inc.
Link
10-K
3/26/2019
10.43
Material contracts—License and 
Collaboration Agreements
†10.38
Collaborative Research, Development and 
License Agreement, dated June 11, 2003, by 
and between Curis, Inc. and Genentech, Inc.
Link
10-Q
8/6/2015
10.1
††10.39
Collaboration, License and Option 
Agreement, dated January 18, 2015, by and 
between Curis, Inc. and Aurigene Discovery 
Technologies Limited
Link
10-K
2/24/2022
10.36
††10.40
First Amendment to Collaboration, License 
and Option Agreement, dated September 7, 
2016, by and between Curis, Inc. and 
Aurigene Discovery Technologies Limited
Link
10-K
2/24/2022
10.37
 
 
Incorporated by Reference
Exhibit
No.
Description
Link to 
Filing
Form
SEC Filing
Date
Exhibit
Number
Filed with
this 10-K
Table of Contents
120

†10.41
Second Amendment to Collaboration, License 
and Option Agreement, dated February 5, 
2020, by and between Curis, Inc. and 
Aurigene Discovery Technologies Limited
Link
10-K
3/19/2020
10.41
††10.42
Third Amendment to Collaboration, License 
and Option Agreement, dated June 4, 2020, 
by and between Curis, Inc. and Aurigene 
Discovery Technologies Limited
Link
10-Q
11/14/2024
10.1
††10.43
Fourth Amendment to Collaboration, License 
and Option Agreement, dated September 16, 
2024, by and between Curis, Inc. and 
Aurigene Oncology Limited (formerly known 
as Aurigene Discovery Technologies Limited)
Link
10-Q
11/14/2024
10.2
Material contracts—Miscellaneous
10.44
Common Stock Purchase Agreement, dated 
January 18, 2015, by and between Curis, Inc. 
and Aurigene Discovery Technologies 
Limited
Link
10-K
2/24/2015
10.34
10.45
Stock Purchase Agreement, dated September 
7, 2016, by and between Curis, Inc. and 
Aurigene Discovery Technologies Limited
Link
10-Q
11/3/2016
10.3
10.46
Registration Rights Agreement, dated January 
18, 2015, by and between Curis, Inc. and 
Aurigene Discovery Technologies Limited
Link
10-K
2/24/2015
10.35
10.47
Registration Rights Agreement, dated 
September 7, 2016, by and between Curis, 
Inc. and Aurigene Discovery Technologies 
Limited
Link
10-Q
11/3/2016
10.4
10.48
Amended and Restated Sales Agreement, 
dated February 8, 2024, by and among Curis, 
Inc., Cantor Fitzgerald & Co. and 
JonesTrading Institutional Services LLC
Link
S-3
2/8/2024
1.2
10.49
Form of Securities Purchase Agreement, 
dated July 5, 2023, by and among Curis, Inc. 
and the Purchasers named therein
Link
8-K
7/6/2023
10.1
10.50
Form of Securities Purchase Agreement, 
dated October 28, 2024, by and among Curis, 
Inc. and the Purchasers named therein
Link
8-K
10/30/2024
10.1
10.51
Registration Rights Agreement, dated October 
28, 2024, by and among Curis, Inc. and the 
Purchasers named therein
Link
8-K
10/30/2024
10.2
Insider Trading Policy
19
Third Amended and Restated Insider Trading 
Policy
Link
X
Additional Exhibits
21
Subsidiaries of Curis
Link
X
23.1
Consent of PricewaterhouseCoopers LLP
Link
X
31.1
Certification of the Principal Executive 
Officer pursuant to Rule 13a-14(a) of the 
Exchange Act/15d-14(a) of the Exchange Act
Link
X
31.2
Certification of the Principal Financial Officer 
pursuant to Rule 13a-14(a) of the Exchange 
Act/15d-14(a) of the Exchange Act
Link
X
 
 
Incorporated by Reference
Exhibit
No.
Description
Link to 
Filing
Form
SEC Filing
Date
Exhibit
Number
Filed with
this 10-K
Table of Contents
121

32.1
Certification of the Chief Executive Officer 
pursuant to Rule 13a-14(b)/15d-14(b) of the 
Exchange Act and 18 U.S.C. Section 1350
Link
X
32.2
Certification of the Chief Financial Officer 
pursuant to Rule 13a-14(b)/15d-14(b) of the 
Exchange Act and 18 U.S.C. Section 1350
Link
X
#97
Dodd-Frank Compensation Recovery Policy
Link
X
101.INS
InLine XBRL Instance Document
X
101.SCH
InLine XBRL Taxonomy Extension Schema 
Document
X
101.CAL
InLine XBRL Taxonomy Extension 
Calculation Linkbase Document
X
101.DEF
InLine XBRL Taxonomy Extension 
Definition Linkbase Document
X
101.LAB
InLine XBRL Taxonomy Extension Label 
Linkbase Document
X
101.PRE
InLine XBRL Taxonomy Extension 
Presentation Linkbase Document
X
104
Cover Page Interactive Data File
X
 
 
Incorporated by Reference
Exhibit
No.
Description
Link to 
Filing
Form
SEC Filing
Date
Exhibit
Number
Filed with
this 10-K
# 
Indicates management contract or compensatory plan or arrangement.
† 
Confidential treatment has been granted as to certain portions, which portions have been separately filed with the 
Securities and Exchange Commission.
†† 
Portions of this exhibit have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K.
Table of Contents
122

ITEM 16.
FORM 10-K SUMMARY
None.
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused 
this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
CURIS, INC.
By:
 
/s/ JAMES E. DENTZER
 
James E. Dentzer
President and Chief Executive Officer
Date: March 31, 2025 
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following 
persons on behalf of the registrant and in the capacities and on the dates indicated.
 
Signature
Title
Date
/s/ JAMES E. DENTZER
President, Chief Executive Officer 
and Director (Principal Executive 
Officer)
March 31, 2025
James E. Dentzer
/s/ DIANTHA DUVALL
Chief Financial Officer (Principal 
Financial and Accounting Officer)
March 31, 2025
Diantha Duvall
/s/ MARTYN D. GREENACRE
Chairman of the Board of Directors
March 31, 2025
Martyn D. Greenacre
/s/ ANNE E. BORGMAN
Director
March 31, 2025
Anne E. Borgman
/s/ JOHN A. HOHNEKER
Director
March 31, 2025
John A. Hohneker
/s/ KENNETH I. KAITIN
Director
March 31, 2025
Kenneth I. Kaitin
/s/ MARC RUBIN
Director
March 31, 2025
Marc Rubin
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123