# EDGAR Filing Document

**Accession Number:** 0001662579
**File Stem:** 0001628280-26-012000
**Filing Date:** 2026-2
**Character Count:** 692261
**Document Hash:** 145697158e27793d21337caa9eabed52
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-26-012000.hdr.sgml**: 20260226

**ACCESSION NUMBER**: 0001628280-26-012000

**CONFORMED SUBMISSION TYPE**: 10-K

**PUBLIC DOCUMENT COUNT**: 116

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260226

**DATE AS OF CHANGE**: 20260226

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** C4 Therapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001662579
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 475617627
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 10-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39567
- **FILM NUMBER:** 26681746

**BUSINESS ADDRESS:**
- **STREET 1:** 490 ARSENAL WAY
- **STREET 2:** SUITE 120
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472
- **BUSINESS PHONE:** (617) 231-0700

**MAIL ADDRESS:**
- **STREET 1:** 490 ARSENAL WAY
- **STREET 2:** SUITE 120
- **CITY:** WATERTOWN
- **STATE:** MA
- **ZIP:** 02472

?xml version='1.0' encoding='ASCII'? cccc-20251231

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**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, 2025**

**OR**

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

**FOR THE TRANSITION PERIOD FROM &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; TO**

**Commission File Number 001-39567**

_____________________________________

**C4 Therapeutics, Inc.**

**(Exact name of Registrant as specified in its Charter)** 

_____________________________________

---

| | |
|:---|:---|
| **Delaware** | **47-5617627** |
| **(State or other jurisdiction of<br>incorporation or organization)** | **(I.R.S. Employer**<br>**Identification No.)** |
| **490 Arsenal Way, Suite 120**<br>**Watertown, MA** | **02472** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

**Registrant's telephone number, including area code: (617) 231-0700**

_____________________________________

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

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading<br>Symbol(s)** | **Name of each exchange on which registered** |
| Common Stock, $0.0001 par value per share | CCCC | The Nasdaq Global Select Market |

---

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

_____________________________________

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes □ No ⌧

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes □ No ⌧

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

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). Yes ⌧ No □

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

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | □ | Accelerated filer | □ |
| Non-accelerated filer | ⌧ | Smaller reporting company | ⌧ |
| Emerging growth company | □ | | |

---

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

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. □

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. □

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). □

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. □

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). □

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

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the Registrant, based on the closing price of the shares of common stock on The NASDAQ Stock Market on June 30, 2025, was $100,051,846.

The number of shares of Registrant's Common Stock outstanding as of February 23, 2026 was 97,578,175.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant's definitive proxy statement for its 2026 Annual Meeting of Stockholders to be filed pursuant to Regulation 14A within 120 days of the end of the registrant's fiscal year ended December 31, 2025 are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein.

PCAOB Auditor Firm ID: 185 Auditor Name: KPMG LLP Auditor Location: Boston, MA, United States

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**Table of Contents**

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| | | |
|:---|:---|:---|
| | | **Page** |
| **[PART I](#i5011ba653e214f14a9bed9a7ac77aa67_22)** | | |
| [Item 1.](#i5011ba653e214f14a9bed9a7ac77aa67_25) | <u>[Business](#i5011ba653e214f14a9bed9a7ac77aa67_25)</u> | [1](#i5011ba653e214f14a9bed9a7ac77aa67_25) |
| [Item 1A.](#i5011ba653e214f14a9bed9a7ac77aa67_28) | <u>[Risk Factors](#i5011ba653e214f14a9bed9a7ac77aa67_28)</u> | [29](#i5011ba653e214f14a9bed9a7ac77aa67_28) |
| [Item 1B.](#i5011ba653e214f14a9bed9a7ac77aa67_31) | <u>[Unresolved Staff Comments](#i5011ba653e214f14a9bed9a7ac77aa67_31)</u> | [71](#i5011ba653e214f14a9bed9a7ac77aa67_31) |
| Item 1C. | <u>[Cybersecurity](#i5011ba653e214f14a9bed9a7ac77aa67_34)</u> | [71](#i5011ba653e214f14a9bed9a7ac77aa67_34) |
| [Item 2.](#i5011ba653e214f14a9bed9a7ac77aa67_37) | <u>[Properties](#i5011ba653e214f14a9bed9a7ac77aa67_37)</u> | [72](#i5011ba653e214f14a9bed9a7ac77aa67_37) |
| [Item 3.](#i5011ba653e214f14a9bed9a7ac77aa67_40) | <u>[Legal Proceedings](#i5011ba653e214f14a9bed9a7ac77aa67_40)</u> | [72](#i5011ba653e214f14a9bed9a7ac77aa67_40) |
| [Item 4.](#i5011ba653e214f14a9bed9a7ac77aa67_43) | <u>[Mine Safety Disclosures](#i5011ba653e214f14a9bed9a7ac77aa67_43)</u> | [72](#i5011ba653e214f14a9bed9a7ac77aa67_43) |
| **[PART II](#i5011ba653e214f14a9bed9a7ac77aa67_46)** |  |  |
| [Item 5.](#i5011ba653e214f14a9bed9a7ac77aa67_49) | <u>[Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities](#i5011ba653e214f14a9bed9a7ac77aa67_49)</u> | [73](#i5011ba653e214f14a9bed9a7ac77aa67_49) |
| [Item 6.](#i5011ba653e214f14a9bed9a7ac77aa67_52) | <u>[\[Reserved\]](#i5011ba653e214f14a9bed9a7ac77aa67_52)</u> | [73](#i5011ba653e214f14a9bed9a7ac77aa67_52) |
| [Item 7.](#i5011ba653e214f14a9bed9a7ac77aa67_55) | <u>[Management's Discussion and Analysis of Financial Condition and Results of Operations](#i5011ba653e214f14a9bed9a7ac77aa67_55)</u> | [73](#i5011ba653e214f14a9bed9a7ac77aa67_55) |
| [Item 7A.](#i5011ba653e214f14a9bed9a7ac77aa67_76) | <u>[Quantitative and Qualitative Disclosures About Market Risk](#i5011ba653e214f14a9bed9a7ac77aa67_76)</u> | [83](#i5011ba653e214f14a9bed9a7ac77aa67_76) |
| [Item 8.](#i5011ba653e214f14a9bed9a7ac77aa67_79) | <u>[Financial Statements and Supplementary Data](#i5011ba653e214f14a9bed9a7ac77aa67_79)</u> | [83](#i5011ba653e214f14a9bed9a7ac77aa67_79) |
| [Item 9.](#i5011ba653e214f14a9bed9a7ac77aa67_82) | <u>[Changes in and Disagreements with Accountants on Accounting and Financial Disclosure](#i5011ba653e214f14a9bed9a7ac77aa67_82)</u> | [83](#i5011ba653e214f14a9bed9a7ac77aa67_82) |
| [Item 9A.](#i5011ba653e214f14a9bed9a7ac77aa67_85) | <u>[Controls and Procedures](#i5011ba653e214f14a9bed9a7ac77aa67_85)</u> | [83](#i5011ba653e214f14a9bed9a7ac77aa67_85) |
| [Item 9B.](#i5011ba653e214f14a9bed9a7ac77aa67_88) | <u>[Other Information](#i5011ba653e214f14a9bed9a7ac77aa67_88)</u> | [84](#i5011ba653e214f14a9bed9a7ac77aa67_88) |
| [Item 9C.](#i5011ba653e214f14a9bed9a7ac77aa67_91) | <u>[Disclosure Regarding Foreign Jurisdictions that Prevent Inspections](#i5011ba653e214f14a9bed9a7ac77aa67_91)</u> | [84](#i5011ba653e214f14a9bed9a7ac77aa67_91) |
| **[PART III](#i5011ba653e214f14a9bed9a7ac77aa67_94)** |  |  |
| [Item 10.](#i5011ba653e214f14a9bed9a7ac77aa67_97) | <u>[Directors, Executive Officers and Corporate Governance](#i5011ba653e214f14a9bed9a7ac77aa67_97)</u> | [85](#i5011ba653e214f14a9bed9a7ac77aa67_97) |
| [Item 11.](#i5011ba653e214f14a9bed9a7ac77aa67_100) | <u>[Executive Compensation](#i5011ba653e214f14a9bed9a7ac77aa67_100)</u> | [85](#i5011ba653e214f14a9bed9a7ac77aa67_100) |
| [Item 12.](#i5011ba653e214f14a9bed9a7ac77aa67_103) | <u>[Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters](#i5011ba653e214f14a9bed9a7ac77aa67_103)</u> | [85](#i5011ba653e214f14a9bed9a7ac77aa67_103) |
| [Item 13.](#i5011ba653e214f14a9bed9a7ac77aa67_106) | <u>[Certain Relationships and Related Transactions, and Director Independence](#i5011ba653e214f14a9bed9a7ac77aa67_106)</u> | [85](#i5011ba653e214f14a9bed9a7ac77aa67_106) |
| [Item 14.](#i5011ba653e214f14a9bed9a7ac77aa67_109) | <u>[Principal Accounting Fees and Services](#i5011ba653e214f14a9bed9a7ac77aa67_109)</u> | [85](#i5011ba653e214f14a9bed9a7ac77aa67_109) |
| **[PART IV](#i5011ba653e214f14a9bed9a7ac77aa67_112)** |  |  |
| [Item 15.](#i5011ba653e214f14a9bed9a7ac77aa67_115) | <u>[Exhibits, Financial Statement Schedules](#i5011ba653e214f14a9bed9a7ac77aa67_115)</u> | [86](#i5011ba653e214f14a9bed9a7ac77aa67_115) |
| [Item 16](#i5011ba653e214f14a9bed9a7ac77aa67_118) | <u>[Form 10-K Summary](#i5011ba653e214f14a9bed9a7ac77aa67_118)</u> | [88](#i5011ba653e214f14a9bed9a7ac77aa67_118) |

---

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS**

This Annual Report on Form 10-K, or Form 10-K, including the section entitled "Management's Discussion and Analysis of Financial Condition and Results of Operations," contains express or implied forward-looking statements that are based on our management's belief and assumptions, and on information currently available to our management. Although we believe that the expectations reflected in these forward-looking statements are reasonable, these statements relate to future events or our future operational or financial performance, and involve known and unknown risks, uncertainties, and other factors that may cause our actual results, performance, or achievements to be materially different from any future results, performance, or achievements expressed or implied by these forward-looking statements. Forward-looking statements in this Form 10-K may include, but are not limited to, statements about:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the initiation, timing, progress, results, safety and efficacy, and cost of our research and development programs and our current and future preclinical studies and clinical trials, including statements regarding the timing of initiation and completion of studies or trials, the period during which the results of the trials will become available, and our research and development programs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to obtain funding for our operations necessary to continue or complete further development, manufacturing and commercialization of our product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to obtain and maintain regulatory approval for any of our current or future product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the period of time over which we anticipate our existing cash and cash equivalents, and marketable securities will be sufficient to fund our operating expenses and capital expenditure requirements;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to identify and develop product candidates for treatment of additional disease indications;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the potential attributes and benefits of our product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the rate and degree of market acceptance and clinical utility for any product candidates we may develop;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the pricing and reimbursement of our product candidates, if approved, including the possibility for reduced pricing of any approved products if they are later subject to mandatory price negotiation with the Centers for Medicare and Medicaid Services under the Inflation Reduction Act of 2022 or other applicable laws;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the effects of competition with respect to any of our current or future product candidates, as well as innovations by current and future competitors in our industry;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the implementation of our strategic plans for our business, any product candidates we may develop, and our TORPEDO<sup>®</sup> platform;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the ability and willingness of our third-party strategic collaborators to continue research, development, and manufacturing activities relating to our product candidates, including our ability to advance programs under our existing collaboration agreements with F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., or Roche, Betta Pharmaceuticals Co., Ltd., or Betta Pharma, and Merck KGaA, Darmstadt, Germany, or Merck KGaA, or other new collaboration agreements;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the scope of protection we are able to establish and maintain for intellectual property rights covering our product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our financial performance, including but not limited to our estimates of our future expenses, revenues, capital requirements, and our needs for additional financing;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• future agreements with third parties in connection with the manufacturing and commercialization of our product candidates, if approved;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the size and growth potential of the markets for our product candidates and our ability to serve those markets;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• regulatory developments in the United States and foreign countries;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to contract with third-party suppliers and manufacturers and their ability to perform adequately;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to attract and retain key scientific or management personnel;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• developments relating to our competitors and our industry;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the effect of any geopolitical conflicts or new or increased international tariffs, including mitigation efforts and economic effects, on any of the foregoing or other aspects of our business operations, including but not limited to our preclinical studies, ongoing clinical trials and future clinical trials; and

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• other risks and uncertainties, including those discussed in Part I, Item 1A - Risk Factors in this Form 10-K.

In some cases, forward-looking statements can be identified by terminology such as "will," "may," "should," "could," "expects," "intends," "plans," "aims," "anticipates," "believes," "estimates," "predicts," "potential," "continue," or the negative of these terms or other comparable terminology, although not all forward-looking statements contain these words. These statements are only predictions. You should not place undue reliance on forward-looking statements because they involve known and unknown risks, uncertainties, and other factors, which are, in some cases, beyond our control and which could materially affect results. Factors that may cause actual results to differ materially from current expectations include, among other things, those listed under the section titled "Risk Factors" and elsewhere in this Form 10-K. If one or more of these risks or uncertainties occur, or if our underlying assumptions prove to be incorrect, actual events or results may vary significantly from those expressed or implied by the forward-looking statements. No forward-looking statement is a promise or a guarantee of future performance.

The forward-looking statements in this Form 10-K represent our views as of the date of this Form 10-K. We anticipate that subsequent events and developments will cause our views to change. However, while we may elect to update these forward-looking statements at some point in the future, we have no current intention of doing so except to the extent required by applicable law. You should therefore not rely on these forward-looking statements as representing our views as of any date subsequent to the date of this Form 10-K.

This Form 10-K may include statistical and other industry and market data that we obtained from industry publications and research, surveys, and studies conducted by third parties. 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. We have not independently verified the information contained in such sources.

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**SUMMARY OF RISK FACTORS**

Our ability to implement our business strategy is subject to numerous risks that you should be aware of before making an investment decision. These risks are described more fully in Part I, Item 1A - Risk Factors in this Form 10-K. These risks include, among others:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• We are a clinical-stage biopharmaceutical company and have incurred significant losses since our inception. We expect to incur losses over at least the next several years and may never achieve or maintain profitability. Our net loss was $105.0 million and $105.3 million for the years ended December 31, 2025 and 2024, respectively.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• We will need substantial additional funding to pursue our business objectives and continue our operations. If we are unable to raise capital when needed, we may be required to delay, limit, reduce or terminate our research or product development programs or future commercialization efforts.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Our approach to the discovery and development of product candidates based on our TORPEDO platform is unproven, which makes it difficult to predict the time, cost and likelihood of successfully developing any products.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• While we are a clinical-stage company and have commenced clinical trials of several product candidates, we have never obtained regulatory approval to commercialize any of our product candidates. Our business could be harmed if we are unable to develop, obtain regulatory approval for and/or commercialize our product candidates, or if we experience significant delays in doing any of these things.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• We cannot be certain of the timely completion or outcome of our preclinical testing and clinical trials. In addition, the results of preclinical studies may not be predictive of the results of clinical trials and the results of any early-stage clinical trials we commence may not be predictive of the results of later-stage clinical trials.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Our preclinical studies and clinical trials may fail to demonstrate adequately the safety and efficacy of any of our product candidates, which would prevent, delay, or require additional research or analysis to proceed with development, regulatory approval, and commercialization of our current and future product candidates.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• We have ongoing collaborations with Roche, Betta Pharma, and Merck KGaA. We may also seek to enter into additional collaborations in the future with third parties for the discovery, development and/or commercialization of certain of our product candidates. However, we may never realize the full potential benefits under these existing or potential collaboration arrangements.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• We face substantial competition, which may result in others discovering, developing or commercializing products for the same indication and/or patient population before or more successfully than we do.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• We rely, and expect to continue to rely, on third parties for the manufacture of our product candidates for preclinical and clinical testing, as well as for commercial manufacture if any of our product candidates receive marketing approval. This reliance on third parties may increase the risk that we will not have sufficient quantities of our product candidates in a timely manner, or at an acceptable cost or quality.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• If we are unable to obtain required marketing approvals for, commercialize, manufacture, obtain, and maintain patent protection for or gain market acceptance of our product candidates, or if we experience significant delays in doing so, our business will be materially harmed and our ability to generate revenue from product sales will be materially impaired.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Potential changes in government programs and changes in government staffing or funding levels could affect various aspects of our business, and our degrader clinical candidates that require government review or approval may experience delays in obtaining requisite authorizations.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• International trade policies, including tariffs, sanctions, and trade barriers may adversely affect our business, financial condition and results of operations and prospects.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• If we are unable to obtain and maintain patent protection for our technology and any future products or if the scope of the patent protection obtained is not sufficiently broad or enforceable, our competitors could develop and commercialize technology, product candidates, or products similar or identical to ours, and our ability to successfully commercialize our technology, product candidates, and any future products may be impaired.

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**NOTE REGARDING COMPANY REFERENCES**

Unless the context otherwise requires, the terms "C4 Therapeutics," the "Company," "we," "us," and "our" in this Form 10-K refer to C4 Therapeutics, Inc. and its consolidated subsidiary.

**NOTE REGARDING TRADEMARKS**

We own or have rights to various trademarks, service marks, and trade names that are used in connection with the operation of our business, including our company name, C4 Therapeutics, our logo, the name of our TORPEDO technology platform and the names of our BIDAC and MONODAC protein degrader product candidates. This Form 10-K may also contain trademarks, service marks, and trade names of third parties, including, without limitation, our collaboration partners Roche, Biogen, Merck KGaA, and Pfizer Inc., which are the property of their respective owners. Our use or display of third parties' trademarks, service marks, trade names or products in this Form 10-K is not intended to and does not imply a relationship with, or endorsement or sponsorship by us. Solely for convenience, the trademarks, service marks, and trade names referred to in this Form 10-K may appear without the®, <sup>TM</sup> or <sup>SM</sup> symbols, but the omission of such references is not intended to indicate, in any way, that we will not assert, to the fullest extent under applicable law, our rights or the right of the applicable owner of these trademarks, service marks, and trade names.

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**PART I**

**Item 1. Business.**

**Overview**

We are a clinical-stage biopharmaceutical company dedicated to delivering on the promise of targeted protein degradation, or TPD, science to create a new generation of small-molecule medicines that transform patients' lives. Leveraging our proprietary TORPEDO platform, we efficiently design and optimize small molecule protein degraders that are highly active against their desired targets by harnessing the body's natural process for destroying unwanted proteins. Our strategy is to develop degraders that modulate clinically validated disease pathways with best-in-class or first-in-class potential to address significant unmet patient needs. To date, our degraders have demonstrated oral bioavailability and catalytic activity, and we have also leveraged our capability to design compounds that are brain penetrant.

*Our Clinical and Preclinical Pipeline*

Our clinical pipeline has two oncology degraders, cemsidomide, an IKZF1 and IKZF3 degrader, for multiple myeloma, or MM, and CFT8919, an EGFR L858R degrader for non-small-cell lung cancer, or NSCLC. Our discovery strategy is focused on selecting targets where we believe TPD offers a compelling mechanistic rationale and first-in-class potential in inflammation, neuroinflammation and neurodegeneration diseases. Our solely-owned pipeline is reflected below.

![pipeline.jpg](cccc-20251231_g1.jpg)

Our most advanced product candidate, cemsidomide, is an orally bioavailable MonoDAC (molecular glue type) degrader targeting IKZF1 and IKZF3, or IKZF1/3. Cemsidomide has the opportunity to address a significant unmet need across multiple lines of therapy in multiple myeloma supported by a strong mechanistic rationale, well-defined biology, and a differentiated safety profile with compelling anti-myeloma activity demonstrated in our Phase 1 trial in combination with dexamethasone.

Our other clinical-stage oncology product candidate, CFT8919, is an orally bioavailable, allosteric, mutant-selective BiDAC degrader of epidermal growth factor receptor, or EGFR, with an L858R mutation in non-small cell lung cancer, or NSCLC. Our collaboration partner, Betta Pharma, is conducting clinical development of CFT8919 in Greater China. In preclinical studies, CFT8919 demonstrated equivalent anti-proliferation activity against the major EGFR-inhibitor resistance mutations, including L858R-C797S, L858R-T790M, and L858R-T790M-C797S compared to L858R single mutation in Ba/F3 cell models in vitro.

We are further diversifying our internal pipeline by developing new degraders focused on inflammation, neuroinflammation, and neurodegeneration. We have engineered degraders that have successfully achieved blood-brain barrier penetration in preclinical studies, which is a key step in developing medicines with the potential to treat brain metastases in central nervous system diseases. This element is a key part of our strategy is selecting targets where there is a strong degrader rationale over other therapeutic modalities. We are also advancing a discovery pipeline in collaboration with Merck KGaA, and Roche. Our partnership strategy allows us to further expand our reach in both oncology and non-oncology indications.

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**Our Strategy**

We are committed to improving outcomes for patients through the discovery, development, and commercialization of novel therapies in oncology as well as inflammation, neuroinflammation, and neurodegeneration.

Key elements of our strategy are to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• **Advance our clinical oral oncology degrader programs.** We currently are advancing two clinical programs that were developed from our proprietary TORPEDO platform and have the potential to improve patients' outcomes.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;◦ **Develop cemsidomide as a potential best-in-class IKZF1/3 degrader:** The Phase 1 trial of cemsidomide in combination with dexamethasone demonstrated a differentiated safety profile with compelling anti-myeloma activity. Cemsidomide is advancing to the next phase of development with an efficient regulatory strategy, which includes the potential for two accelerated approvals. Our development strategy includes a Phase 2 trial evaluating cemsidomide in combination with dexamethasone as well as a Phase 1b evaluating cemsidomide in combination with elranatamab, pursuant to the Pfizer Agreement (defined below).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• **Progress new internal discovery strategy focused on inflammation, neuroinflammation, and neurodegeneration, which are areas that could benefit from a TPD approach.** Through our target identification process, we evaluate where TPD could have an outsized patient impact. We have selected targets that modulate clinically validated pathway(s) with a clear target-to-disease link where degraders potentially offer a clear and compelling advantage over other therapeutic options, including developing degraders that are central nervous system, or CNS, penetrant. We have extended capabilities to identify molecular glue degraders for targets with and without G- and RT-loops by utilizing DNA-encoded library (DEL) technology and are advancing our programs to lead optimization and development candidate nominations.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• **Collaborate with partners to realize the full value of the TORPEDO platform.** We have existing strategic collaborations with Merck KGaA, and Roche under which we are working to identify and develop novel degraders across multiple therapeutic areas and targets. These partnerships allow us to advance and accelerate our research and enable access to additional capabilities and expand the utility of our TORPEDO platform to address high unmet patient needs.

**Our Product Candidates—Highly Potent and Selective Targeted Protein Degraders** 

***Cemsidomide: An IKZF1/3 Degrader for Multiple Myeloma***

Cemsidomide is an orally bioavailable degrader designed to target IKZF1/3, for the treatment of MM. IKZF1/3 are targets that have a strong mechanistic rationale and well-defined biology. In preclinical studies, cemsidomide has shown robust activity in MM in subcutaneous xenograft mouse models, providing preclinical proof of concept. We believe that the differentiated pharmacology of cemsidomide, including its high potency, may translate into improved clinical outcomes for MM patients.

*IKZF1 and IZKF3 Are Well Understood Biological Targets for Certain Blood Cancers* 

IKZF1 and IKZF3 are transcription factors central to the differentiation of lympho-myeloid multipotent progenitor cells through mature immune cells, including T cells and plasma cells, such as B cells. IKZF1/3 directly regulate the activity of IRF4, another transcription factor that MM is dependent on for survival. Degradation of these transcription factors leads to myeloma cell death as well as T-cell activation. Further, IKZF1/3 has been clinically validated as lenalidomide and pomalidomide degrade these targets through their mechanism of action.

*Clinical Trials of Cemsidomide in MM* 

The first-in-human Phase 1 dose escalation clinical trial for cemsidomide was designed to primarily investigate safety, tolerability, and anti-tumor activity. Secondary and exploratory objectives were to characterize the pharmacokinetics, or PK, and pharmacodynamics, or PD, profile of cemsidomide. The trial evaluated cemsidomide in combination with dexamethasone for patients with relapsed or refractory MM.

In August 2021, the United States Food and Drug Administration, or FDA, granted orphan drug designation to cemsidomide for the treatment of MM.

In September 2025, at the International Myeloma Society Annual Meeting and in December 2024 at the American Society of Hematology Annual Meeting, we presented data from the Phase 1 dose escalation trial evaluating cemsidomide in combination with dexamethasone. Patients enrolled received at least three lines of specified prior therapy, including lenalidomide, pomalidomide, proteasome inhibitors and an anti-CD38 monoclonal antibody, or mAb. Of the patients

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enrolled on the trial, 75% received prior CAR-T or T-cell engager therapy, highlighting the fact that, despite newer available MM therapies in earlier lines, patients are still progressing on these therapies. These data also showed that neutropenia, a common side effect of all IKZF1/3 degraders, was manageable and there were no discontinuations related to cemsidomide safety. Additionally, cemsidomide as a monotherapy and in combination with dexamethasone showed immune cell activation at clinically relevant doses in MM. Together, the data supports a potential best-in-class profile with a well-tolerated and differentiated safety profile and compelling anti-myeloma activity observed across a broad range of doses in patients who have undergone numerous lines of prior therapy, including B-cell maturation antigen, or BCMA, therapies. We are advancing cemsidomide to later-stage studies, which includes an efficient regulatory strategy with potential for two accelerated approvals.

![cemsi development plan.jpg](cccc-20251231_g2.jpg)

Cemsidomide in combination with dexamethasone is being evaluated in the Phase 2 MOMENTUM (Multi-center trial Of cemsidoMidE iN relapsed/refracTory mUltiple Myeloma) clinical trial for MM patients who have had at least three prior lines of therapy. In 2024, the annual MM prevalence was approximately 42,000 patients in the fourth line setting in the United States, United Kingdom, Germany, Italy, France and Spain. This patient population is expected to grow as immune-based therapies move into earlier treatment lines and patients continue to progress on these therapies. The Phase 2 MOMENTUM trial has the potential for accelerated approval in the later-line MM setting. The trial will enroll approximately 100 patients and aims to assess the anti-myeloma activity and further characterize the safety, tolerability, PK, and PD of this combination regimen. In February 2026, patients began enrolling in the Phase 2 MOMENTUM trial and full trial enrollment is expected to be completed in Q1 2027.

![2l rationale.jpg](cccc-20251231_g3.jpg)

Cemsidomide is also being evaluated in a Phase 1b clinical trial in combination with elranatamab, a BCMAxCD3 Bispecific, in earlier lines of MM therapy. The trial aims to assess safety and tolerability of this combination at various clinically relevant doses of cemsidomide. Importantly, cemsidomide has demonstrated the ability to activate T-cells at doses that also show anti-myeloma activity. We believe that the BCMA bispecific in combination with cemsidomide has the potential to enhance depth of response while maintaining a manageable safety profile..

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.![version 2 phase 1b.jpg](cccc-20251231_g4.jpg)

*Multiple Myeloma* 

According to estimates available through Evaluate Pharma, in 2024 there were approximately 65,370 new cases of MM in the United States, United Kingdom, and Germany, France, Spain, and Italy, or EU4, combined. Although overall outcomes for patients with MM have improved substantially over the past several decades, including the emergence of immune-based regimens there remains an unmet need.

New approaches and outcomes for MM have improved over the past several decades with the emergence of immune-based regimens, despite newer therapies, IKZF1/3 degradation continues to play a key role in treating MM patients. Based on fluorescence in situ hybridization, or FISH, studies on bone marrow, patients are stratified into high-risk or standard-risk categories. High-risk patients eligible for hematopoietic cell transplantation receive induction therapy with a combination regimen, often including an IKZF1/3 targeting drug like lenalidomide, to reduce the number of tumor cells prior to stem cell collection. Alternatively, patients who are ineligible for hematopoietic cell transplantation immediately receive a combination regimen, often with three to four classes of drugs, including an IKZF1/3 targeting drug and a steroid, typically dexamethasone, until progression or unacceptable toxicity.

***CFT8919: Potent, Oral, Allosteric, Mutant-Selective Degrader of EGFR L858R***

*EGFR is a Well-Characterized Protein Target for Oncology with Known Resistance Mechanisms*

EGFR is a receptor tyrosine kinase that is involved in cell signaling pathways that control cell division and survival. Mutations in the EGFR gene cause the EGFR protein to signal aberrantly in some types of cancer cells, including a subset of patients with NSCLC. Of the known EGFR tyrosine kinase domain mutations, approximately 90% occur as deletions in exon 19 or as point mutations in exon 21, the latter resulting in arginine replacing leucine at codon 858 (L858R). The L858R activating mutation in exon 21 accounts for approximately 25-45% of EGFR-mutant NSCLC. EGFR tyrosine kinase inhibitors, or TKIs, have been developed and provide significant clinical benefit. However, patients ultimately develop resistance, often by acquisition of a secondary resistance mutation in EGFR. T790M is the most prevalent resistance mutation after first- and second-generation EGFR TKIs including gefitinib, erlotinib, afatinib, and dacomitinib. A third-generation covalent EGFR inhibitor, osimertinib, can overcome this resistance mechanism and is now approved in the first-line setting, but acquired resistance remains an issue. Patients whose disease progresses after osimertinib lack effective treatment options and the EGFR C797S mutation is the most common on-target resistance mechanism.

CFT8919 is a mutant-selective degrader targeting EGFR L858R, which remains active in the setting of resistant secondary mutations (T790M and/or C797S). We believe there may be an opportunity for CFT8919 as a component of first-line

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therapy, where we hope to achieve deeper and more durable responses due to the advantages of a degrader over a standard protein inhibitor. Further, since 30-60% of NSCLC patients develop brain metastases overtime, penetration of the CNS sufficient to drive therapeutic effect in this compartment was a key factor in our selection of CFT8919 as our development candidate.

*Clinical Trials of CFT8919 in Non-Small Cell Lung Cancer*

In May 2023, we entered into an exclusive licensing and collaboration agreement with Betta Pharma for the development and commercialization of CFT8919 in Greater China, including mainland China, Hong Kong SAR, Macau SAR and Taiwan. We believe this partnership will enable us to expedite the overall development of CFT8919 in patients with EGFR-driven resistance mutations due to a high prevalence of EGFR L858R driven NSCLC in Greater China. As a result, Betta Pharma is conducting the Phase 1 clinical study in Greater China and, in November 2024, we announced that Betta Pharma had dosed the first patient in this clinical trial. Data generated from this clinical trial will inform our ex-China clinical development strategy. We retain all rights to develop and commercialize CFT8919 outside of Greater China.

*Non-Small-Cell Lung Cancer*

According to consensus estimates available through Evaluate Pharma approximately 419,380 patients in the United States, United Kingdom, and EU4 combined were diagnosed with NSCLC in 2024 and between 10–15% of these patients have mutant EGFR, or mEGFR. The EGFR mutation is particularly common in NSCLC patients of Asian heritage. In China, where approximately 45,780 patients are diagnosed with NSCLC annually, approximately 50% of diagnoses are driven by the EGFR mutation.

The EGFR L858R mutation is the second most common activating EGFR mutation, found in approximately 40% of EGFR diagnoses in the United States and China. When treated with standard of care EGFR inhibitors, patients with EGFR L858R mutations have worse outcomes with therapy compared to patients who exhibit an exon19 deletion. When using osimertinib as a monotherapy in the front-line setting in patients with EGFR L858R, the median progression-free survival, or PFS, is 14.4 months compared to 21.4 months for patients with an exon19 deletion. The most EGFR-mediated resistance mechanism to osimertinib in this patient population is the C797S mutation. This shorter median PFS rate and resistance demonstrates the unmet medical need for the L858R patient population.

**Our Discovery Approach & Strategy** 

We employ a comprehensive approach that leverages our decade-long learnings and successes to design, optimize, and select drug candidates that can maximize the potential therapeutic benefit of our protein degraders. We have the capability to design two different types of protein degraders depending on the target, which include MonoDAC degraders (molecular glue type) and BiDAC degraders (heterobivalent). MonoDAC degraders (molecular glue type) function by binding to E3 ligases and creating a new surface on the E3 ligases that enhances the binding of the E3 ligases to target proteins. BiDAC (heterobivalent) degraders are designed to have one end of the molecule bind to the disease-causing target protein and the other end bind to the E3 ligase.

Our approach is centered on advancing a high-value portfolio of degraders in both oncology and diseases of inflammation, neuroinflammation, and neurodegeneration, leveraging validated biological pathways, where there are large unmet needs. Our discovery strategy is focused on developing degraders to treat inflammation, neuroinflammation and neurodegenerative diseases focuses on targets with first-in-class potential, that modulate clinically validated pathways and offer additional disease-relevant biology to further improve efficacy that are uniquely suited for targeted protein degradation. Prolonged CNS exposure and finely-tuned degradation kinetics to optimize efficacy and safety are key design parameters of our degraders. To that end, we have invested heavily in experimental tools, computational and predictive models, and team expertise to analyze and optimize the catalytic strength of our degraders through our TORPEDO platform. We have also extended our screening capabilities to identify molecular glue degraders for targets with and without G- and RT-loops by utilizing DNA-encoded, or DEL, technology as well as through enhancements to our TORPEDO platform.

We are focused on selecting targets that are uniquely suited for targeted protein degradation and that modulate clinically validated pathways for autoimmune disorders provides high potential to extend known immunology biology to treat neuroinflammation and neurodegeneration with targeted protein degraders. Degraders have the potential to deliver the efficacy of a biologic in the CNS where biologics are not effective. Furthermore, degraders also have the potential to outperform small molecule inhibitors in efficacy and safety in CNS diseases due to lower exposure requirements, extended PKPD, and the ability to design candidates that avoid high maximal concentrations necessary to drive exposure into the brain. Our approach provides an opportunity to streamline clinical decision-making via a focused early clinical proof-of-concept, including early validation based on pharmacodynamic markers in healthy subjects, followed by potentially significant opportunities for expansion to several diseases.

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***Our TORPEDO*** ***Platform***

Our proprietary TORPEDO platform is an important element of our leading approach to TPD. The platform is a collection of experimental approaches and tools that gives us the ability to design, analyze, and predict degrader performance. We have made significant investments in building both computational and experimental methods to enhance our ability to rationally design degraders. These tools allow us to design degraders at the molecular level that have desired properties for the applicable protein target or disease, such as oral bioavailability, CNS penetration, enhanced potency, and selectivity.

Our degraders are designed to activate the E3 ligase and facilitate target protein binding and ubiquitination, resulting in rapid overall target degradation. The ability of our degraders to repeat this process recursively, with the same single degrader molecule interacting sequentially with many copies of the target protein, allows us to design our product candidates for catalytic degradation turnover and, as a result, create candidates that have the potential to provide a greater therapeutic effect. Our degraders need to achieve sufficient binding affinity to initiate brief ternary complex formation, but, unlike traditional inhibitors, they do not need to achieve prolonged stable binding to achieve desired physiological effects.

Another key element of our platform is our investment in Cereblon. Our lead degrader candidates utilize Cereblon as the E3 ligase. There are over 600 E3 ligases in the human proteome, of which the biology has been well characterized in no more than 50 of such E3 ligases. A limited number of E3 ligases, including Cereblon, VHL, MDM2, IAPs and ß-TRCP, have been reported to be suitable for targeted protein degradation. We have chosen to focus on Cereblon as the E3 ligase target of our protein degradation approach for several reasons:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Cereblon is widely expressed across tissues and is present in all cellular compartments, including the cytoplasm and nucleus, potentially allowing for Cereblon-mediated targeted protein degradation across a wide variety of clinical settings and potential targets.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• We have developed multiple distinct, proprietary Cereblon binders that facilitate rational design of degraders with desired drug-like properties, such as oral bioavailability, solubility, CNS penetration, permeability, and stability. All of our product candidates and programs benefit from the use of these proprietary Cereblon binders in the design of novel degraders. Our library of Cereblon binders offers a proprietary and powerful toolkit for degrader discovery. This Cereblon binder toolkit enables a rational design approach to identifying and optimizing degraders with desired properties, as each of these binder classes facilitate the design of degraders with distinct drug-like properties and, importantly, unique "exit trajectories" from the Cereblon surface following protein degradation, which can promote better target degradation turnover.

Taken together, our TORPEDO platform allows us to rapidly iterate and improve our degrader discovery processes and design our degraders and product candidates to have specific properties that enhance catalytic degradation turnover and drug performance, which directly impact disease. These features of our platform and discovery process allow us to create product candidates that addresses large unmet medical needs.

***Advantages of Targeted Protein Degradation Over Inhibitors***

*Improved and Sustained Potency*

Degraders have the ability to offer a many-fold amplification of effect because a single degrader molecule can exert its effect recursively on a large number of target proteins. This ability of a degrader molecule to repeat its catalytic cycle multiple times is known as catalytic amplification. In contrast, traditional protein inhibitors rely on one-to-one binding of an inhibitor molecule with a target protein, with the protein only deactivated while the inhibitor is bound. This means that much higher concentrations of a protein inhibitor drug are needed to achieve the same level of therapeutic effect as a protein degrader.

In addition to requiring significantly less drug than a protein inhibitor, a degrader's impact on target protein function is more durable than that of a traditional inhibitor. This is because the activity of a target protein resumes as soon as an inhibitor is no longer bound to it, whereas a degrader completely eliminates its target protein and disease-causing activity is prevented until the cell is able to synthesize replacement proteins – a process that can take hours or even days. Therefore, in contrast to a typical reversible inhibitor, the effect of a degrader can persist well after it has been cleared from the body. The ability of a degrader to eliminate its target completely is another mechanism for improved potency relative to a traditional inhibitor. This is because a single protein can often have multiple functions, each mediated by a different domain. An inhibitor can only interfere with protein functions directly impacted by the region to which it binds. In the case of a disease-causing protein where more than one function contributes to pathogenic activity (for example, aberrant enzyme activity as well as ability to form multi-protein complexes), a degrader will eliminate all functions and therefore have a more profound effect versus an inhibitor that only blocks one. All these factors mean that degraders may help to achieve a more durable biological effect and better clinical outcomes.

*High Selectivity*

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One of the primary challenges of protein inhibition is attempting to identify and develop molecules that only target cancerous cells or disease-causing proteins without having deleterious effects on normal cells or other proteins, commonly referred to as off-target effects.

Each step in the protein degradation catalytic cycle requires specific positioning of the target protein and E3 ligase to progress through the cycle, and these positioning requirements can serve as filters to increase selectivity of a degrader molecule so that only the target protein is ultimately degraded, even if the degrader binds to multiple proteins. For example, degraders not only interact with the target protein, but must do so in such a way that targets an E3 ligase and assumes a ternary complex conformation amenable to productive target protein ubiquitination. As a result, even if a degrader were to bind to a non-target protein, the resulting ternary complex may not have a conformation that is appropriate to facilitate ubiquitination and subsequent degradation. We are able to leverage these intrinsic properties of the ubiquitin-proteasome protein degradation pathway to design degraders to be highly selective for disease-causing proteins.

*Expansive Target Landscape*

Traditional inhibitors can only have a therapeutic effect if they are able to bind tightly to a site on a disease-causing protein that interferes with its function. This requires that the inhibitor binds directly to a protein's active site, or to an allosteric site in a way that leads to a conformational change that impairs protein activity. This inherently limits the number of druggable targets addressable with traditional inhibitors, as many potential binding sites are not in regions of a protein that interfere with function. In contrast, degraders can use any binding site on a protein to facilitate formation of a ternary complex with an E3 ligase that leads to its destruction. Additionally, whereas an inhibitor requires high affinity to its binding site to maintain occupancy and block function, degraders can interact with relatively weaker affinity in a transient fashion and still enable ubiquitination and destruction of the protein. Targeted protein degradation greatly expands the potential target pool to include a significant proportion of those currently considered undruggable.

***Our Discovery Programs***

We are progressing our internal discovery-stage pipeline in inflammation, neuroinflammation and neurodegenerative disease areas where there are clear and compelling advantages over inhibitors. We have consistently been able to develop orally bioavailable and highly catalytic heterobivalent degraders that can penetrate the blood brain barrier to achieve high CNS exposure and provide compelling results in CNS models, thus we are capitalizing on our experience to deliver degraders with first-in-class potential that are CNS penetrant. As part of our discovery strategy, we are selecting targets that modulate clinically validated pathways in an effort to focus on early clinical validation, followed by growth in value through indication expansion.

Artificial Intelligence (AI) is increasingly being used in the pharmaceutical industry. We are employing AI as a tool to assist in degrader discovery and optimization, which is a significant element of our current business and our future strategy. Our scientists direct the use of AI in these efforts and make all decisions on which degraders to advance through discovery.

![Discovery pathways.jpg](cccc-20251231_g5.jpg)

In addition to our internal discovery strategy, we also have discovery programs in collaboration with our partners, Merck KGaA and Roche.

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**Collaborations and License Agreements** 

***Pfizer Supply Agreement***

On September 30, 2025, we entered into a Clinical Trial Collaboration and Supply Agreement with Pfizer Inc., or the Pfizer Agreement. Pursuant to the Pfizer Agreement, Pfizer will supply elranatamab (ELREXFIO<sup>®</sup>), a B-cell maturation antigen CD3 targeted bispecific antibody, for the Phase 1b trial evaluating the safety and tolerability of cemsidomide, an IKZF1/3 degrader, and dexamethasone in combination with elranatamab as a second-line or later therapy for patients with multiple myeloma. Under the terms of the Pfizer Agreement, Pfizer will supply elranatamab for use in the Phase 1b trial at no cost, while we will sponsor, conduct and pay the costs of the trial. The Pfizer Agreement provides that we and Pfizer will jointly own clinical data generated from the trial. The collaboration is managed by a joint development committee responsible for coordinating all regulatory and other activities under the Pfizer Agreement. Under the terms of the Pfizer Agreement, each party has various termination rights under certain circumstances, including material breach, insolvency, and other customary provisions, subject to certain conditions.

***Merck KGaA Collaboration and License Agreement***

In March 2024, we entered into a license and collaboration agreement with Merck KGaA, or the Merck KGaA Agreement, to discover two targeted protein degraders against critical oncogenic proteins. Pursuant to the terms of the Merck KGaA Agreement, we granted Merck KGaA a worldwide, exclusive license under certain of our intellectual property rights to develop, manufacture, and commercialize two targeted protein degraders against critical oncogenic proteins. Merck KGaA is responsible for all development, regulatory approval, manufacturing and commercialization costs. Under the terms of the Merck KGaA Agreement made an upfront cash payment of $16.0 million and agreed to fund our discovery research efforts. We are eligible to receive approximately $740 million in the aggregate in discovery, regulatory, and commercial milestone payments across the collaboration, plus tiered royalties on net sales. Royalties payable from Merck KGaA to us range from mid-single digit to low-double digit percentages, subject to reductions under certain circumstances as described in the Merck KGaA Agreement. In April 2025, the Company earned a $1.0 million milestone for the achievement of a discovery milestone for one of the collaboration targets.

The collaboration is managed by a joint research committee, or Merck KGaA JRC, and a joint steering committee, or Merck KGaA JSC, each of which is comprised of our representatives and those of Merck KGaA. Under the Merck KGaA Agreement, Merck KGaA has final decision-making authority over the Merck KGaA JSC, which has the authority to decide matters that cannot be resolved by the Merck KGaA JRC. Merck KGaA may terminate the Merck KGaA Agreement on a project-by-project basis or in its entirety upon 60 days' prior written notice. Each party also has various termination rights under certain circumstances, including but not limited to patent challenges, insolvency, or a material breach by the other party, subject to certain conditions.

***Betta Pharma License and Collaboration Agreement***

In May 2023, we entered into a license and collaboration agreement with Betta Pharma, or the Betta Pharma License Agreement, to collaborate on the development and commercialization of CFT8919, an orally bioavailable BiDAC degrader that is designed to be potent and selective against EGFR bearing an oncogenic L858R mutation, in Greater China, comprised of mainland China, Hong Kong SAR, Macau SAR and Taiwan, with us retaining rights to develop and commercialize CFT8919 in the rest of the world other than Greater China, or the C4T Territory.

Pursuant to the terms of the Betta Pharma License Agreement, we granted Betta Pharma an exclusive license under certain of our intellectual property rights to develop, manufacture and commercialize CFT8919 for all uses in humans in Greater China. Betta Pharma is responsible for all development, regulatory approval, manufacturing and commercialization costs in Greater China except where Betta Pharma acts as our agent in Greater China in connection with a global trial sponsored by us. As part of the collaboration, Betta Pharma has made an upfront cash payment of $10.0 million and we are eligible to receive up to $357.0 million in aggregate milestone payments, plus tiered royalties on net sales of CFT8919 in Greater China. Royalties payable from Betta Pharma to us range from low to mid double-digit percentages, subject to certain reductions under certain circumstances as described in the Betta Pharma License Agreement. In addition, as part of the collaboration, we have agreed to make milestone payments to Betta Pharma of up to $40.0 million following our receipt of approval of a New Drug Application for CFT8919 from the FDA, with the milestone amount based on the percentage of patients in contemplated clinical trials that were enrolled by Betta Pharma and the line of therapy of the approval. In addition, we have agreed to pay Betta Pharma tiered royalties on net sales of CFT8919 in the C4T territory in the low single digit percentage range, subject to certain reductions under certain circumstances as described in the Betta Pharma License Agreement. The royalty term for all contemplated royalties under the Betta Pharma License Agreement shall terminate on a product-by-product and country-by-country basis on the latest of (i) the twelve (12) year anniversary of the first commercial sale of such product in such country, (ii) the expiration of any regulatory exclusivity period that covers such product in such country, and (iii) the expiration of the last-to-expire licensed patent that covers such product in such

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country. Further, in January 2024, an affiliate of Betta Pharma purchased shares of our common stock for $25.0 million as described below.

The collaboration is managed by a joint steering committee, which is composed of representatives from both Betta Pharma and the Company. Following the completion of the dose escalation phase of the Phase 1 trial of CFT8919, Betta Pharma may terminate the Betta Pharma License Agreement for convenience upon at least 90 days' prior written notice. Each party also has various termination rights under certain circumstances, including but not limited to regulatory safety stoppages, patent challenges, insolvency, or a material breach by the other party, subject to certain conditions.

***Roche Amended and Restated License Agreement***

We entered into an amended and restated license agreement with Roche in December 2018, or the Roche Agreement. Under the Roche Agreement, we agreed to collaborate with Roche in the research, development, manufacture, and commercialization of target-binding degrader medicines using our proprietary TORPEDO platform for the treatment of cancers and other indications. Under the Roche Agreement, we are responsible for conducting preclinical research and development activities for a number of targets selected by Roche in accordance with a target selection and replacement procedure set forth in the Roche Agreement. We are also responsible for conducting Phase 1 clinical trials for products directed to certain targets and for manufacturing activities in connection with the applicable research plans, subject to Roche's right to assume manufacturing responsibilities at pre-defined times. We and Roche each share in the costs of these research activities.

Under the Roche Agreement, we granted Roche an exclusive option to obtain an exclusive, worldwide license, with the right to sublicense through multiple tiers, to develop and commercialize products directed at each target that is subject to the collaboration. Upon the exercise of its option for a particular target, Roche is responsible for the manufacture, development, and commercialization of products directed to that target, at its sole expense. However, we have the option to co-develop products directed to certain targets, in which case we would be responsible for a portion of the development costs associated with such co-developed products and eligible to receive increased royalties on sales of such co-developed products. We also have an option to co-detail products for which we have exercised our co-development option. If we exercise our co-detail option, we will be responsible for a portion of the co-detailing costs. We generally have the right to opt out of these co-development and co-detailing activities.

In November 2020, we signed an amendment to the Roche Agreement that provides a mechanism through which we and Roche can mutually agree to terminate the Roche Agreement on a target-by-target basis by the entry into a mutual target termination agreement. Upon a termination of this nature, the Roche Agreement, as amended, provides that all rights in know-how and intellectual property in support of products that use inhibition as their mode of action, referred to as the Roche Field, will revert to Roche and all rights in respect of know-how and intellectual property in support of products that use degradation as their mode of action, referred to as the C4T Field, will revert to us. Further, this amendment states that, following the entry into a mutual target termination agreement, Roche will have rights in and responsibility for any know-how and intellectual property generated as a result of the collaboration that fits within the Roche Field, and we will have rights in and responsibility for any know-how and intellectual property generated as a result of the collaboration that fits within the C4T Field. In support of this allocation of rights, Roche provided us, and we provided Roche, with a perpetual, irrevocable, fully paid up, exclusive (even as to party granting the license), sublicensable (including in multiple tiers) license to the patents that are allocated to a party under the mutual target termination agreement and a perpetual, irrevocable fully paid up, non-exclusive, sublicensable (including in multiple tiers) license to the know-how that is allocable to a party under the mutual termination agreement.

In November 2020, we and Roche mutually agreed to terminate the Roche Agreement as to the target EGFR. Further, in November 2021, July 2022, and December 2023, we and Roche mutually agreed to terminate the Roche Agreement as to BRAF and then two additional undisclosed targets. As a result, Roche is now free to pursue these targets in the Roche Field and we are free to pursue these targets in the C4T Field, and all rights in and responsibility for know-how and intellectual property related to these targets in the Roche Field reverted to the Roche parties, and all rights in and responsibility for know-how and intellectual property related to these targets in the C4T Field reverted to us, with Roche assigning the patents in the C4T Field to us. In September 2023, Roche designated a new undisclosed target to be added to the collaboration pursuant to the Roche Agreement. As a result of these efforts, two targets currently remain as part of this collaboration. In December 2023, we and Roche mutually agreed to further amend the Roche Agreement to adjust the timing of Roche's option rights to the remaining two targets to begin upon Roche's receipt of the dose range finding data package.

Upon signing the Roche Agreement, we received upfront consideration of $40.0 million from Roche. In addition, we receive annual research funding from Roche for each active research plan and we are eligible to receive additional payments upon the achievement of predetermined research and development success criteria with respect to certain targets. In March 2025, the Company achieved a $2.0 million milestone for each of the active collaboration targets upon the

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progression of targets to the lead series identification achievement phase. Under the Roche Agreement, as amended, if Roche exercises its option right for either of the two remaining targets, Roche is obligated to pay an exercise fee of $8.0 million. For each target option exercised by Roche, we are eligible to receive milestone payments up to $273.0 million upon the achievement of certain research, development, and commercial milestones with respect to corresponding products, subject to certain reductions and exclusions based on intellectual property coverage. Roche is also required to pay us up to $150.0 million per target in one-time sales-based milestone payments upon the achievement of specified levels of net sales of a product directed to such target. Finally, we are eligible to receive tiered royalties ranging from mid-single digit to mid-teen percentages on net sales of products sold by Roche pursuant to its exercise of its option rights, subject to certain reductions. For sales of products for which we exercise our co-development right, the applicable royalty rates will be increased by a low-single digit percentage.

Unless earlier terminated, the Roche Agreement expires on the date when no royalty or other payment obligations under the Roche Agreement are or will become due. We and Roche each may terminate the Roche Agreement in its entirety or on a target-by-target or product-by-product basis and, in our case, on a country-by-country basis, for the other party's uncured material breach of its obligations under the Roche Agreement or upon the other party's bankruptcy, insolvency or similar proceedings. Roche may terminate the Roche Agreement for convenience on a target-by-target, product-by-product or country-by-country basis. In the event we are acquired by a competitor of Roche, Roche has the right to require us to terminate our research, development, and co-detailing activities under the Roche Agreement, after which time we would not be eligible to receive payments for such terminated activities.

The collaboration is managed by a joint research committee, or the Roche JRC. The Company has control over the Roche JRC prior to Roche's exercise of its option rights as to a particular target, with Roche assuming control of the Roche JRC thereafter.

***Biogen Collaborative Research and License Agreement***

In December 2018, we entered into a collaborative research and license agreement, or the Biogen Agreement, with Biogen MA, Inc., or Biogen, whereby we agreed to collaborate with Biogen and use our proprietary protein degrader platform to research, develop, and identify small molecule protein degraders. In February 2020, we entered into an amendment to the Biogen Agreement that provided further clarity around Biogen's ownership of target binding moieties, which are portions of molecules, and any related intellectual property that are directed at or bind to collaboration targets. This amendment further provides that Biogen licenses to us rights to use these Biogen target binding moieties and any related intellectual property as needed in order to conduct the research and development activities contemplated under the Biogen Agreement.

Under the Biogen Agreement, we granted Biogen an exclusive license under our intellectual property, with the right to sublicense through multiple tiers, (a) for the purpose of performing candidate development activities in accordance with research and development plans agreed upon by the parties and (b) for the purpose of exploiting all degraders and products for any use in the world.

Under the terms of the Biogen Agreement, for which the research term ended in June 2023, we were responsible for conducting research and development activities for a number of targets selected by Biogen in accordance with a target selection and replacement procedure set forth in the agreement. Upon Biogen's commencement of the IND-enabling study for a degrader directed towards each target selected by Biogen, Biogen is responsible for, and agreed to use commercially reasonable efforts to carry out, all further development, regulatory affairs, manufacturing, and commercialization for at least one product directed against each such target in certain territories.

Upon execution of the Biogen Agreement, Biogen paid us an upfront payment of $45.0 million as prepayment for candidate development activities. Upon Biogen's receipt of degraders directed to each target that satisfy pre-defined criteria, we received payments ranging from $2.0 million to $5.0 million per target. In 2024, Biogen paid us a total of $16.0 million for two development candidates we delivered to Biogen that had commenced IND-enabling studies. In September 2025, the Company received and earned a $2.0 million milestone from Biogen after Biogen advanced BIIB142, an IRAK4 degrader that the Company delivered to Biogen, into the clinic. Further, in January 2026, the Company earned a second $2.0 million milestone from Biogen after Biogen advanced BIIB129, a BTK degrader, that was designed by us, into Phase 1 clinical development. For each target, Biogen is required to pay the Company (a) development and commercialization milestone payments totaling up to $35.0 million and (b) sales milestone payments totaling up to $26.0 million for the achievement of certain amounts of net sales of all products directed to such target, each subject to certain reductions. In addition, Biogen is required to pay us royalties on a product-by**-**product and country-by-country basis on the net sales of each product, at percentages in the mid-single digits, subject to certain reductions.

Unless earlier terminated, the Biogen Agreement expires on the date of the last product-by-product and country-by-country basis upon the expiration of the last-to-expire valid claim of a patent right covering the composition of matter of method of use in the approved label of the applicable product in the applicable country. We and Biogen each may terminate the

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Biogen Agreement (a) with respect to one or more development candidates, products or collaboration targets or, only in the case of Biogen, the entire agreement, for the other party's uncured material breach of its obligations and (b) in its entirety upon the other party's bankruptcy, insolvency or similar proceedings. Biogen may also terminate the Biogen Agreement in its entirety or with respect to one or more development candidates, products or collaboration targets for convenience.

**Competition**

The biotechnology and pharmaceutical industries are characterized by rapidly advancing technologies, intense competition, and a strong emphasis on intellectual property and proprietary products. While we believe that our technology, expertise, scientific knowledge, and intellectual property estate provide us with competitive advantages, we face potential competition from many different sources, including major pharmaceutical, specialty pharmaceutical, biotechnology companies, academic institutions, governmental agencies, and public and private research institutions that conduct research, seek patent protection, and establish collaborative arrangements for research, development, manufacturing, and commercialization. Not only must we compete with other companies that are focused on protein degradation, but any product candidates that we successfully develop and commercialize will compete with existing therapies and new therapies that may become available in the future. Moreover, our industry is characterized by the existence of large numbers of patents and frequent allegations of patent infringement.

Our focus is on the discovery and development of protein degradation therapies using our TORPEDO platform. There are several biotechnology companies developing product candidates based on chimeric small molecules for targeted protein degradation, as well as several large pharmaceutical companies and academic institutions have disclosed investments and research in this field. In addition to competition from other protein degradation therapies, any products that we develop may also face competition from other types of therapies, such as small molecule, antibody, T cell or gene therapies.

Our lead product candidates target oncologic indications. The most common methods of treating patients in oncologic indications are surgery, radiation, and drug therapy, including chemotherapy, hormone therapy, cellular therapy, and targeted drug therapy. There are a variety of available drug therapies marketed for cancer. In many cases, these drugs are administered in combination to enhance efficacy. Some of the currently approved drug therapies are branded and subject to patent protection and others are available on a generic basis. Many of these approved drugs are therapies and are widely accepted by physicians, patients, and third-party payors. In general, although there has been considerable progress over the past few decades in the treatment of cancer and the currently marketed therapies provide benefits to many patients, these therapies are all limited to some extent in their efficacy and frequency of adverse events, and none of them are successful in treating all patients. As a result, the level of morbidity and mortality from cancer remains high.

In addition to currently marketed drugs, there are also several product candidates in preclinical development for the treatment of oncologic indications. These products in development may provide efficacy, safety, convenience, and other benefits that are not provided by currently marketed therapies. As a result, they may provide significant competition for any of our product candidates for which we obtain market approval.

If any of our product candidates are approved for the indications for which we expect to conduct clinical trials, they will compete with the foregoing therapies and currently marketed drugs, as well any drugs potentially in development. It is also possible that we will face competition from other biologic or pharmaceutical approaches, as well as from other types of therapies.

Many of our current or potential competitors, either alone or with their collaboration partners, have significantly greater financial resources and expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals, and marketing approved products than we do. These competitors also compete with us in recruiting and retaining qualified scientific and management personnel, and establishing clinical trial sites, and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs. Mergers and acquisitions in the pharmaceutical and biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. These competitors also compete with us in recruiting and retaining qualified scientific and management personnel, and establishing clinical trial sites, and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs. Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are more convenient or are less expensive than any products that we may develop. Our competitors also may obtain FDA or other regulatory approval for their products more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market position before we are able to enter the market. In addition, our ability to compete may be affected in many cases by insurers or other third-party payors seeking to encourage the use of generic products. There are generic products currently on the market for certain of the indications that we are pursuing, and additional

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products are expected to become available on a generic basis over the coming years. If our product candidates are approved, we expect that they will be priced at a significant premium over competitive generic products.

The key competitive factors affecting the success of all our programs, if approved, are likely to be their efficacy, safety, convenience, price, level of generic competition, and availability of reimbursement.

**Manufacturing of Drug Candidates**

We generally obtain our supplies for our drug candidates from third party contract manufacturing organizations, or CMOs, on a purchase order basis and do not have long-term committed supply arrangements with respect to our product candidates and other materials. Should any of these manufacturers become unavailable to us for any reason, we believe that there are a number of potential replacements, although we may incur some delay in identifying and qualifying such replacements. For additional information, see the section titled "Risk Factors—*Risks Related to Dependence on Third Parties—Manufacturing pharmaceutical products is complex and subject to product delays or loss for a variety of reasons. We contract with third parties for the manufacture of our product candidates for preclinical testing and clinical trials and expect to continue to do so for commercialization. This reliance on third parties increases the risk that we will not have sufficient quantities of our product candidates or products or that we will not have the quantities we desire or require at an acceptable cost or quality or at the right time, which could delay, prevent or impair our development or commercialization efforts.*"

All of our drug candidates are organic compounds of low molecular weight, which are often referred to in the biopharmaceutical community as small molecules, but our BiDAC degraders tend to be larger than traditional small molecule therapeutics. We have selected these compounds not only on the basis of their potential clinical activity and tolerability, but also on their physical properties. Our candidates are manufactured using reliable and reproducible synthetic processes from readily available starting materials and are based on chemistry that is amenable to scale up. We expect to continue to develop drug candidates that can be produced cost effectively at contract manufacturing facilities.

**Commercialization Plans** 

We have not yet established our own commercial organization or distribution capabilities because our product candidates are still in clinical development. We have retained full commercialization rights for all of our programs in development other than those subject to our collaboration agreements. Prior to any of our product candidates receiving marketing approval, at an appropriate time, we will need to develop a plan to commercialize them in the United States and other key markets. We currently anticipate that we would build our own focused, specialized sales, and marketing organization to support the commercialization in the United States of product candidates for which we receive marketing approval and that can be commercialized with such capabilities. We expect to utilize a variety of types of collaboration, co-promotion, distribution, and other marketing arrangements with one or more third parties to commercialize our product candidates in markets outside the United States or for situations in which a larger sales and marketing organization is required.

As product candidates advance through our pipeline, our commercial plans may change. Some of our research programs target potentially larger indications. Data, the size of the development programs, the size of the target market, the size of a commercial infrastructure, and manufacturing needs may all influence our strategies in the United States, Europe, and the rest of the world.

**Intellectual Property** 

Our commercial success depends in part upon our ability to secure and maintain patent and other proprietary protection for our protein degradation technologies, including our TORPEDO platform, our solely-owned product candidates, any product candidates co-owned with Roche, and know-how related to our business. To protect our core technology and products, we will need to successfully prosecute, defend and, if necessary, enforce our intellectual property rights, including, in particular, our patent rights, preserve the confidentiality of our trade secrets and operate without infringing valid and enforceable intellectual property rights of others. For our product candidates, we generally intend to pursue patent protection covering compositions of matter, pharmaceutical compositions, methods of use, including combination therapies, processes of manufacture and process intermediates, where relevant. We continually assess and refine our intellectual property strategies as we develop new technologies and product candidates. We currently plan to file additional patent applications based on our intellectual property strategies, where appropriate, including where we seek to adapt to competition or to improve our business opportunities.

The patent positions for biopharmaceutical companies like us are generally uncertain and can involve complex legal, scientific, and factual issues. Further, the laws governing the protection of intellectual property may change over time due to the issuance of new judicial decisions or the passage of new laws, rules or regulations. In addition, the coverage claimed in a patent application can be significantly reduced before a patent is issued and its scope can be reinterpreted and challenged even after issuance. As a result, we cannot guarantee that any of our product candidates will be protected or

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remain protectable by valid, enforceable patents. We also cannot predict whether the patent applications we are currently pursuing will issue as patents in any particular jurisdiction or whether the claims of any issued patents will provide sufficient proprietary protection from competitors. Any patents that we hold may be challenged, circumvented or invalidated by third parties.

The exclusivity terms of our patents depend upon the laws of the countries in which they are obtained. In the countries in which we currently file, the patent term is 20 years from the earliest date of filing of a non-provisional patent application. The term of a United States patent may be extended to compensate for the time required to obtain regulatory approval to sell a drug (referred to as a patent term extension) or by delays encountered during patent prosecution that are caused by the United States Patent and Trademark Office (referred to as patent term adjustment). For example, the Hatch-Waxman Act permits a patent term extension for FDA-approved new chemical entity drugs of up to five years beyond the ordinary expiration date of one patent that covers the approved drug or its use. The length of the patent term extension is related to the length of time the drug is under regulatory review and diligence during the review process. Patent term extensions in the United States cannot extend the term of a patent beyond a total of 14 years from the date of product approval and only one patent covering an approved drug, or its method of use, may be extended. A similar kind of patent extension, referred to as a Supplementary Protection Certificate, is available in Europe. Legal frameworks may also be available in certain other jurisdictions to extend the term of a patent. We currently intend to seek patent term extensions for our products on any of our issued patents in any jurisdiction where we have a qualifying patent and the extension is available; however, there is no guarantee that the applicable regulatory authorities, including the FDA in the United States, will agree with our assessment of whether extensions of this nature should be granted and, even if granted, the length of these extensions. Further, even if any of our patents are extended or adjusted, those patents, including the extended or adjusted portion of those patents, may be held invalid or unenforceable by a court of final jurisdiction in the United States or a foreign country.

***Patents and Patent Applications***

As of December 31, 2025, in total, we owned thirty-four issued United States patents, more than thirty-seven United States patent applications (which include provisional and United States utility applications), four patent applications filed under the Patent Cooperation Treaty, or PCT, sixty-four patents granted in foreign countries, and over two hundred sixty-five patent applications that are pending in foreign countries.

Our patent portfolio is generally organized into two categories: platform patent filings designed to cover inventions relating to our proprietary TORPEDO platform; and protein target-specific degrader patent filings, each of which categories is described in more detail below.

***TORPEDO Platform Portfolio***

We solely own our platform patent estate, which has been designed using our proprietary TORPEDO platform. As of December 31, 2025, our platform patent portfolio included twenty-five issued United States patents, seventeen pending United States patent applications, one PCT patent application, twenty-five patents granted in foreign countries, and more than ninety pending foreign patent applications. This patent portfolio covers a variety of our ligands that bind to the Cereblon E3 ubiquitin ligase, or CRBN, either alone, as part of a MonoDAC molecule, or as part of a BiDAC molecule that includes a protein ligand to a disease-modifying protein target.

Specifically, this platform portfolio consists of eighteen patent families covering the TORPEDO platform with composition of matter claims directed to various classes of CRBN ligands and degraders derived therefrom, as well as claims to associated methods of use, pharmaceutical compositions, and processes of manufacture. Patents in these families, if issued and maintained, will expire between 2037 and 2044, without taking into account potential patent term extensions or adjustments.

***Products and Target Portfolio***

Our patent applications directed to target-specific degraders, including our product candidates, are focused on composition of matter, pharmaceutical composition, method of use, and process of manufacture claims covering novel compounds designed to degrade disease-causing proteins. As of December 31, 2025, we owned six issued United States patents, nineteen pending United States patent applications, four PCT patent applications, three patents granted in foreign countries, and more than one hundred sixty foreign patent applications covering our degraders and product candidates.

Specifically, as of December 31, 2025, we owned five patent families (two United States patents, four United States patent applications, ten foreign patents, and sixty-seven foreign patent applications) presenting composition of matter and pharmaceutical composition claims to compounds that cause the degradation of the IKZF1/3 protein target, as well as associated methods of use to treat cancer and processes of manufacture. Four of these patent families include claims directed to compositions of matter generally and specifically covering cemsidomide, one of our lead product candidates, and associated methods of use, pharmaceutical compositions, and processes of manufacture, which if issued and

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maintained through the payment of all required fees, will expire in 2040, 2041, 2043 and 2046, respectively, without regard to any possible patent term extensions or adjustments. The fifth patent family (comprising one United States patent) covering our IKZF1/3 degraders is directed to a separate genus than that covered in the previous four families and, if maintained through the payment of all required fees, will expire in 2039, without regard to any possible patent term extensions or adjustments.

As of December 31, 2025, we owned two patent families (three issued United States patents, two United States patent applications, twenty-five foreign patents, and forty-five foreign patent applications) with claims directed to compositions of matter covering our EGFR degraders, including our CFT8919 product candidate, and associated methods of use, pharmaceutical compositions, and processes of manufacture. United States and foreign patents claiming priority to these patent applications, if granted and maintained through the payment of all required fees, will expire in 2040 and 2042, respectively, without regard to any possible patent term extensions or adjustments.

As of December 31, 2025, we owned ten patent families (one issued United States patent, ten United States patent applications, one PCT patent application, and twenty-seven foreign patent applications) with claims directed to compositions of matter covering our BRAF degraders, and associated methods of use, pharmaceutical compositions, and processes of manufacture. United States and foreign patents claiming priority to these patent applications, if granted and maintained through the payment of all required fees, will expire between 2041 and 2046, without regard to any possible patent term extensions or adjustments.

As of December 31, 2025, we owned seven patent families (three issued United States patents, five United States patent applications, two PCT patent applications, and thirty-nine foreign patent applications) with claims directed to compositions of matter covering degraders to undisclosed/other targets and associated methods of use, pharmaceutical compositions, and processes of manufacture. United States and foreign patents claiming priority to these patent applications, if granted and maintained through the payment of all required fees, will expire between 2041 and 2044, without regard to any possible patent term extensions or adjustments.

***Collaboration Patent Applications Co-owned with Roche***

As of December 31, 2025, we co-owned with Roche two United States patent applications pertaining to our collaboration. Our rights to these patent applications are governed by the Roche Agreement, which is described above.

***Target Platform Collaborations***

We work or have worked with strategic partners to expand our platform potential, including Roche, Biogen, Merck Sharp & Dohme, LLC, or Merck, and Merck KGaA. Under the agreements with each of these partners, we generally assign our solely or co-invented patent rights in development candidates to the applicable partner in exchange for financial benefits in the products under development under those agreements

***Trade Secrets***

We also rely on trade secrets, technical know-how and continuing innovation to develop and maintain our competitive advantage. Under the agreements we enter into with them, any of our employees and consultants who are identified on any company-owned patent applications assign any rights they may have in any such patent applications to us. We also rely on confidentiality or other agreements with our employees, consultants, and other advisors to protect our proprietary information. Our policy is to require third parties that receive material confidential information to enter into confidentiality or other agreements with us that contain appropriate protections for our confidential and trade secret information.

***Trademarks***

We own various registered and unregistered trademarks and service marks in the United States and overseas, including C4 THERAPEUTICS, our housemark logo, the name of our TORPEDO platform, and the names of our BIDAC degraders and MONODAC degraders.

**Government Regulation**

The FDA and comparable regulatory agencies in state and local jurisdictions, and in foreign countries impose substantial requirements upon the clinical development, manufacture, and marketing of pharmaceutical products. These agencies and other federal, state and local entities regulate research and development activities, and the testing, manufacture, quality control, safety, effectiveness, labeling, storage, packaging, recordkeeping, tracking, approval, import, export, distribution, advertising, and promotion of our products.

***United States Government Regulation of Drug Products***

In the United States, the FDA regulates drugs under the Federal Food, Drug and Cosmetic Act, or the FDCA, its implementing regulations, and other federal statutes and regulations. The process of obtaining regulatory approvals and the

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subsequent compliance with applicable federal, state, local and foreign statutes and regulations requires the expenditure of substantial time and financial resources. Failure to comply with the applicable United States requirements at any time during the product development process, approval process or after approval may subject an applicant to a variety of administrative or judicial sanctions, such as the FDA's refusal to approve a pending NDA, withdrawal of an approval, imposition of a clinical hold, issuance of warning letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement or civil or criminal penalties.

The process required by the FDA before product candidates may be marketed in the United States generally involves the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• nonclinical laboratory and animal tests, some of which must be conducted in accordance with good laboratory practice, or GLP, requirements;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• submission to the FDA of an investigational new drug, or IND, application, which must become effective before clinical trials may begin;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• approval by an independent institutional review board, or IRB, for each clinical site or centrally before each trial may be initiated;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• adequate and well controlled human clinical trials to establish the safety and efficacy of the proposed product candidate for its intended use, performed in accordance with good clinical practices, or GCP, requirements;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• submission to the FDA of an NDA and payment of user fees;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• satisfactory completion of an FDA advisory committee review, if applicable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• pre-approval inspection of manufacturing facilities and selected clinical investigators for their compliance with current good manufacturing practices, or cGMP, and GCP;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• satisfactory completion of FDA audits of clinical trial sites to assure compliance with GCP and the integrity of the clinical data; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• FDA review and approval of an NDA to permit commercial marketing for particular indications for use.

The testing and approval process requires substantial time, effort, and financial resources.

***Preclinical Studies***

Preclinical studies include laboratory evaluation of drug substance chemistry, pharmacology, toxicity, and drug product formulation, as well as animal studies to assess potential safety and efficacy. Prior to commencing the first clinical trial with a product candidate, a sponsor must submit the results of the preclinical tests and preclinical literature, together with manufacturing information, analytical data, and any available clinical data or literature, among other required information, to the FDA as part of an IND. Some preclinical studies may continue even after the IND is submitted. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA, within the 30-day time period, raises safety concerns or questions about the conduct of the clinical trial and imposes a clinical hold. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. As a result, submission of an IND may not result in FDA authorization to commence a clinical trial.

***Clinical Trials***

Clinical trials involve the administration of the investigational new drug to human subjects under the supervision of qualified investigators in accordance with GCP requirements. A separate submission to the existing IND must be made for each successive clinical trial conducted during product development, as well as amendments to previously submitted clinical trials. Further, an independent IRB for each institution participating in the clinical trial must review and approve the plan for any clinical trial, its informed consent form, and other communications to study subjects before the clinical trial commences at that site. The IRB must continue to oversee the clinical trial while it is being conducted, including any changes to the study plans.

Regulatory authorities, an IRB or the sponsor may suspend or discontinue a clinical trial at any time on various grounds, including a finding that the subjects are being exposed to an unacceptable health risk, the clinical trial is not being conducted in accordance with the FDA's or the IRB's requirements or if the drug has been associated with unexpected serious harm to subjects. Some studies also include a data safety monitoring board, or DSMB, which receives special access to unblinded data during the clinical trial and may advise the sponsor to halt the clinical trial if it determines that there is an unacceptable safety risk for subjects or other grounds, such as no demonstration of efficacy.

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Phase 1—Studies are initially conducted to test the product candidate for safety, dosage tolerance, structure-activity relationships, mechanism of action, absorption, metabolism, distribution, and excretion in healthy volunteers or subjects with the target disease or condition. If possible, Phase 1 clinical trials may also be used to gain an initial indication of product effectiveness.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Phase 2—Controlled studies are conducted with groups of subjects with a specified disease or condition to provide enough data to evaluate the preliminary efficacy, optimal dosages and dosing schedule, and expanded evidence of safety. Multiple Phase 2 clinical trials may be conducted to obtain information prior to beginning larger and more expansive Phase 3 clinical trials.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Phase 3—These clinical trials are generally undertaken in larger subject populations to provide statistically significant evidence of efficacy and to further test for safety in an expanded subject population at multiple clinical trial sites. These clinical trials are intended to establish the overall risk/benefit profile of the product and provide an adequate basis for product labeling.

Typically, clinical trials are designed in consultation with the FDA or foreign regulatory authorities during these development phases. The indications under development can influence the study designs employed during the conduct of clinical trials, such as for a first-line cancer treatment indication which may require head-to-head data demonstrating clinical superiority or non-inferiority to currently available therapies. The timeline for first-line cancer indication development programs may also be longer than for indications sought in the second or later lines of treatment due to a desire for regulatory authorities to expedite access to later-line treatments for those whose cancer has progressed despite available and earlier-line treatments. As such, many new oncology products initially seek an indication in treatments beyond the first line of treatment, which tend to be a smaller available treatment population in any oncology indication, and any later approvals sought for those products in earlier lines of treatment that target a larger treatment population may require the conduct of additional clinical trials.

The FDA has implemented initiatives that may affect the development of oncology product candidates. For example, Project Optimus, which was launched in 2021, is an initiative to reform the dose selection and dose optimization paradigm across oncology drug development to emphasize selection of a dose or doses that maximize not only the efficacy of a drug but also its safety and tolerability. Project Optimus requires that developers of oncology drugs implement strategies in ongoing programs to leverage nonclinical and clinical data in dose selection, including the potential need to conduct randomized evaluations of a range of doses in trials, and require that these studies take place as early as possible in the development program.

In addition, 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 drug developers can utilize an adaptive trial design commonly referred to as a seamless trial design in early stages of oncology drug 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 drug development and reduce developmental costs and time.

The FDA may require, or companies may pursue, additional clinical trials after a product is approved. In certain instances, FDA may mandate these clinical trials, called Phase 4 trials, as a condition of approval of the product. The results of Phase 4 trials can confirm the effectiveness of a product candidate and can provide important safety information.

Clinical trials must be conducted under the supervision of qualified investigators in accordance with GCP requirements, which include the requirements that all research subjects provide their informed consent in writing for their participation in any clinical trial and the review and approval of the study by an IRB. Investigators must also provide information to the clinical trial sponsors to allow the sponsors to make specified financial disclosures to the FDA. Clinical trials are conducted under protocols detailing, among other things, the objectives of the trial, the trial procedures, the parameters to be used in monitoring safety and the efficacy criteria to be evaluated and a statistical analysis plan. Information about some clinical trials, including a description of the trial and trial results, must be submitted within specific timeframes to the NIH for public dissemination on www.clinicaltrials.gov. Sponsors also must disclose certain results of these clinical trials, although disclosure of results may be delayed until after the new product or new indication has been approved by the FDA.

Progress reports detailing the results of the clinical trials must be submitted at least annually to the FDA and more frequently if serious adverse events occur. Written IND safety reports must be submitted to the FDA and investigators for serious and unexpected suspected adverse events, findings from other studies or animal or in vitro testing that suggest a significant risk for human subjects and any clinically important increase in the rate of a serious suspected adverse reaction over that listed in the protocol or investigator brochure. The sponsor must submit an IND safety report within 15 calendar

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days after the sponsor determines that the information qualifies for reporting. The sponsor also must notify the FDA of any unexpected fatal or life-threatening suspected adverse reaction within 7 calendar days after the sponsor's initial receipt of information.

The manufacture of investigational drugs for the conduct of human clinical trials is subject to cGMP requirements. Investigational drugs and active pharmaceutical ingredients imported into the United States are also subject to regulation by the FDA relating to their labeling and distribution. Further, the export of investigational drug products outside of the United States is subject to regulatory requirements of the receiving country, as well as U.S. export requirements under the FDCA. Progress reports detailing the results of the clinical trials must be submitted at least annually to the FDA and the IRB, and more frequently if serious adverse effects occur.

Concurrent with clinical trials, companies usually complete additional animal studies and must also develop additional information about the chemistry and physical characteristics of the product candidate, 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 product candidate and, among other things, must develop methods for testing the identity, strength, quality, and purity of the final product. Additionally, appropriate packaging must be selected and tested, and stability studies must be conducted to demonstrate that the product candidate does not undergo unacceptable degradation over its shelf life.

***FDA Expedited Review and Approval Programs***

The FDA has various programs, including fast track designation, breakthrough therapy designation, accelerated approval, and priority review, which are intended to expedite or simplify the process for the development and FDA review of drugs that are intended for the treatment of serious or life-threatening diseases or conditions and demonstrate the potential to address unmet medical needs. The purpose of these programs is to provide important new drugs to patients earlier than under standard FDA review procedures.

Under the fast track program, the sponsor of a new drug candidate may request that FDA designate the drug candidate for a specific indication as a fast track drug concurrent with, or after, the filing of the IND for the drug candidate. To be eligible for a fast track designation, the FDA must determine, based on the request of a sponsor, that a product is intended to treat a serious or life threatening disease or condition and demonstrates the potential to address an unmet medical need. The FDA will determine that a product will fill an unmet medical need if it will provide a therapy where none exists or provide a therapy that may be potentially superior to existing therapy based on efficacy or safety factors. Fast track designation provides additional opportunities for interaction with the FDA's review team and may allow for rolling review of NDA components before the completed application is submitted, if the sponsor provides a schedule for the submission of the sections of the NDA, the FDA agrees to accept sections of the NDA and determines that the schedule is acceptable and the sponsor pays any required user fees upon submission of the first section of the NDA. However, the FDA's time period goal for reviewing an application does not begin until the last section of the NDA is submitted. The FDA may decide to rescind the fast track designation if it determines that the qualifying criteria no longer apply.

In addition, a sponsor can request breakthrough therapy designation for a drug if it is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. Drugs designated as breakthrough therapies are eligible for intensive guidance from the FDA on an efficient drug development program, organizational commitment to the development and review of the product, including involvement of senior managers, and, like fast track products, are also eligible for rolling review of the NDA. Both fast track and breakthrough therapy products may be eligible for accelerated approval and/or priority review, if relevant criteria are met.

Under the FDA's accelerated approval pathway, the FDA may approve a drug for a serious or life threatening illness that provides meaningful therapeutic benefit to patients over existing treatments based upon a surrogate endpoint that is reasonably likely to predict clinical benefit, or on a clinical endpoint that can be measured earlier than irreversible morbidity or mortality, that is reasonably likely to predict an effect on irreversible morbidity or mortality or other clinical benefit, taking into account the severity, rarity or prevalence of the condition and the availability or lack of alternative treatments. 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 verify and describe the effect on the clinical endpoint. Under the Food and Drug Omnibus Reform Act of 2022, or FDORA, the FDA is now permitted to require that these trials be underway prior to approval or within a specific time period after the date of approval for a product granted accelerated approval. Under FDORA, the FDA has increased authority for expedited procedures to withdraw approval of a drug or indication approved under accelerated approval if, for example, the confirmatory trial fails to verify the predicted clinical benefit of the product. Under FDORA, FDA also is empowered to take action, such as issuing fines, against companies that fail to conduct with due diligence any post-approval confirmatory study or submit timely reports to the agency on their

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progress. All promotional materials for drug candidates approved under accelerated approval regulations are subject to prior review by the FDA unless the sponsor is otherwise informed by the FDA.

Once an NDA is submitted for a product intended to treat a serious condition, the FDA may assign a priority review designation if FDA determines that the product, if approved, would provide a significant improvement in safety or effectiveness. A priority review means that the goal for the FDA to review an application is six months, rather than the standard review of ten months under the Prescription Drug User Fee Act, or PDUFA, guidelines. Under the current PDUFA performance goals, these six- and ten-month review periods are measured from the 60-day filing date rather than the receipt date for NDAs for new molecular entities, which typically adds approximately two months to the timeline for review from the date of submission.

Even if a product qualifies for one or more of these programs, the FDA may later decide that the product no longer meets the conditions for qualification or decide that the time period for FDA review or approval will not be shortened. In addition, the manufacturer of an investigational drug for a serious or life-threatening disease is required to make available, such as by posting on its website, its policy on responding to requests for expanded access. Furthermore, fast track designation, breakthrough therapy designation, accelerated approval, and priority review do not change the standards for approval and may not ultimately expedite the development or approval process.

***NDA Submission and Review by the FDA***

Assuming successful completion of the required clinical and preclinical testing, among other items, the results of product development, including chemistry, manufacture and controls, nonclinical studies and clinical trials are submitted to the FDA, along with proposed labeling, as part of an NDA. The submission of an NDA requires payment of a substantial user fee to the FDA. These user fees must be filed at the time of the first submission of the application, even if the application is being submitted on a rolling basis. Fee waivers or reductions are available in some circumstances. One basis for a waiver of the application fee is if the applicant employs fewer than 500 employees, including employees of affiliates, the applicant does not have an approved marketing application for a product that has been introduced or delivered for introduction into interstate commerce and the applicant, including its affiliates, is submitting its first marketing application. Orphan-designated drugs are also exempt from the application fee.

Under the Pediatric Research Equity Act, or PREA, an NDA or supplement to an NDA for a new active ingredient, indication, dosage form, dosage regimen or route of administration must contain data that are adequate to assess the safety and efficacy of the drug 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. PREA generally does not apply to a drug for an indication for which orphan drug designation has been granted, except that PREA will apply to an original NDA for a new active ingredient that is orphan-designated if the drug is a molecularly targeted cancer product intended for the treatment of an adult cancer and is directed at a molecular target that FDA determines to be substantially relevant to the growth or progression of a pediatric cancer. The FDA may, on its own initiative or at the request of the applicant, grant deferrals for submission of some or all pediatric data until after approval of the product for use in adults or full or partial waivers from the pediatric data requirements.

The FDA may refer applications for drugs that contain active ingredients, including any ester or salt of the active ingredients, which have not previously been approved by the FDA to an advisory committee. The FDA may also refer drugs which present difficult questions of safety, purity or potency to an advisory committee. An advisory committee is typically a panel that includes clinicians and other experts who review, evaluate, and make 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 reviews applications to determine, among other things, whether a product is safe and effective for its intended use and whether the manufacturing controls are adequate to assure and preserve the product's identity, strength, quality, and purity. Before approving an NDA, the FDA will inspect the facility or facilities where the product is manufactured. The FDA will not approve an application unless it determines that the manufacturing processes and facilities, including contract manufacturers and subcontractors, 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 trial sites to assure compliance with GCPs.

Once the FDA receives an application, it has 60 days to review the NDA to determine if it is substantially complete to permit a substantive review, before it accepts the application for filing. Once the submission is accepted for filing, the FDA begins an in-depth review of the NDA. Under the goals and policies agreed to by the FDA under PDUFA, the FDA's review goal for a standard NDA for a new molecular entity, or NME, is 10 months from the 60-day filing date. For priority review applications, the FDA's review goal for NME NDAs is within six months of the 60-day filing date. Such deadlines are referred to as the PDUFA date. The PDUFA date is only a goal, and the FDA does not always meet its PDUFA dates.

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The review process and the PDUFA date may also be extended if the FDA requests or the NDA sponsor otherwise provides additional information or clarification during the review period that amends the original application.

Once the FDA's review of the application is complete, the FDA will issue either a Complete Response Letter, or CRL, or an approval letter. A CRL indicates that the review cycle of the application is complete, and the application is not ready for approval. A CRL generally contains a statement of specific conditions that must be met in order to secure final approval of the NDA and may require additional clinical or preclinical testing or other information or analyses in order for the FDA to reconsider the application in a resubmitted NDA. Even with the submission of additional information, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval. If and when those conditions have been met to the FDA's satisfaction, the FDA may issue an approval letter. An approval letter authorizes commercial marketing of the drug with specific prescribing information for specific indications.

The FDA may delay or refuse approval of an NDA if applicable regulatory criteria are not satisfied, require additional testing or information, require post-marketing testing and surveillance to monitor safety or efficacy of a product and/or impose other conditions, including distribution restrictions or other risk management mechanisms. For example, the FDA may require a Risk Evaluation and Mitigation Strategy, or REMS, as a condition of approval or following approval to mitigate any identified or suspected serious risks and ensure safe use of the drug. The FDA may prevent or limit further marketing of a product or impose additional post-marketing requirements, based on the results of post-marketing studies 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, FDA notification, and prior FDA review and approval. Further, should new safety information arise, additional testing, product labeling changes or FDA notification may be required.

If regulatory approval of a product is granted, such approval may entail limitations on the indicated uses for which such product may be marketed or may include contraindications, a boxed warning, or other warnings or precautions in the product labeling, which has resulted in a boxed warning. A boxed warning is the strictest warning put in the labeling a drug product by the FDA when there is reasonable evidence of an association of a serious hazard with the drug. The FDA also may not approve the inclusion of all labeling claims sought by an applicant. Once approved, the FDA may withdraw the product approval if compliance with pre- and post-marketing regulatory standards is not maintained or if problems occur after the product reaches the marketplace. In addition, the FDA may require Phase 4 post-marketing studies to monitor the effectiveness or safety of an approved product and may limit further marketing of the product based on the results of these post-marketing studies.

***U.S. Post-Approval Requirements***

Any products manufactured or distributed by us pursuant to FDA approvals will be subject to continuing regulation by the FDA, including periodic reporting, product sampling and distribution, advertising, promotion, drug shortage reporting, compliance with any post-approval requirements imposed as a condition of approval such as Phase 4 clinical trials, or a REMS, and recordkeeping and reporting requirements, including adverse experiences.

After approval, many changes to the approved product, such as adding new indications or other labeling claims are subject to prior FDA review and approval. There also are continuing, annual program fee requirements for approved products, as well as new application fees for supplemental applications with clinical data. Drug manufacturers and their subcontractors, and those supplying products, ingredients, and components of them, are required to register their establishments with the FDA and certain state agencies, and to list their drug products, and are subject to periodic announced and unannounced inspections by the FDA, and these state agencies for compliance with cGMPs and other requirements, which impose procedural and documentation requirements.

Changes to the manufacturing process are strictly regulated and often require prior FDA approval or notification before being implemented. FDA regulations also require investigation and correction of any deviations from cGMP and specifications, 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.

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 withdrawal of marketing approval, mandatory revisions to the approved labeling to add new safety information or other limitations, imposition of post-market studies or clinical trials to assess new safety risks, or imposition of distribution or other restrictions under a REMS program, among other consequences.

The FDA closely regulates the marketing and promotion of drugs. A company can make only those claims relating to safety and efficacy that are consistent with the FDA approved labeling. Physicians, in their independent professional medical judgement, may prescribe legally available products for uses that are not described in the product's labeling and

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that differ from those tested by us and approved by the FDA. However, manufacturers and third parties acting on their behalf are prohibited from marketing or promoting drugs in a manner inconsistent with the approved labeling. The FDA and other agencies 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. Further, FDA's Office of Prescription Drug Promotion scrutinizes promotional materials and advertising. Any materials that are false, misleading or promote unapproved uses may lead to enforcement actions and could require corrective communications.

Failure to comply with any of the FDA's requirements could result in significant adverse enforcement actions. These may include a variety of administrative or judicial sanctions, such as refusal to approve pending applications, license suspension or revocation, withdrawal of an approval, imposition of a clinical hold or termination of clinical trials, FDA Form 483s, warning letters, untitled letters, modification of promotional materials or labeling, product recalls, product seizures or detentions, refusal to allow imports or exports, total or partial suspension of production or distribution, debarment, injunctions, fines, consent decrees, corporate integrity agreements, refusals of government contracts and new orders under existing contracts, exclusion from participation in federal and state healthcare programs, restitution, debarment, disgorgement or civil or criminal penalties, including fines and imprisonment. It is also possible that failure to comply with the FDA's requirements relating to the promotion of prescription drugs may lead to investigations alleging violations of federal and state healthcare fraud and abuse and other laws, as well as state consumer protection laws. Any of these sanctions could result in adverse publicity, among other adverse consequences.

***U.S. Marketing Exclusivity***

The FDA provides periods of non-patent regulatory exclusivity, which provides the holder of an approved NDA limited protection from new competition in the marketplace for the innovation represented by its approved drug for a period of three or five years following the FDA's approval of the NDA. Five years of exclusivity are available to new chemical entities, or NCEs. An NCE is a drug that contains no active moiety that has been approved by the FDA in any other NDA. An active moiety is the molecule or ion responsible for the therapeutic activity of the drug substance, excluding those appended portions of the molecule that cause the drug to be an ester, salt, including a salt with hydrogen or coordination bonds or other noncovalent bonds not involving the sharing of electron pairs between atoms, derivatives, such as a complex (i.e., formed by the chemical interaction of two compounds), chelate (i.e., a chemical compound) or clathrate (i.e., a polymer framework that traps molecules) of the molecule. During the exclusivity period, the FDA may not accept for review or approve an Abbreviated New Drug Application, or ANDA, or a 505(b)(2) NDA submitted by another company that contains the previously approved active moiety. An ANDA or 505(b)(2) application, however, may be submitted one year before NCE exclusivity expires if a Paragraph IV certification is filed.

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 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. If the request is granted, the FDA will disclose the identity of the therapeutic agent and its potential use. Orphan product designation does not convey any advantage in or shorten the duration of the regulatory review and approval process.

If an orphan-designated drug 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 any other applications for the same product for the same indication for seven years, except in certain limited circumstances. If an orphan-designated drug receives marketing approval for an indication broader than what was designated in its orphan product application, it may not be entitled to exclusivity. Orphan exclusivity also will not block approval of another product under certain circumstances, including if a subsequent product with the same active ingredient 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. Further, the FDA may approve more than one product for the same orphan indication or disease as long as the products contain different active ingredients. Moreover, competitors may obtain approval for the same product but for a different indication for which the orphan product has exclusivity.

In addition, the FDCA also provides incentives for sponsors to conduct studies of drugs in pediatric populations. A drug may be eligible for pediatric exclusivity if a sponsor voluntarily completes a pediatric study that fairly responds to an FDA-issued Written Request. If granted, pediatric exclusivity adds six months to existing regulatory exclusivity periods and patent terms for all approved drug products that contain the active moiety for which pediatric exclusivity was granted.

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***Regulation Outside the United States***

We will be subject to similar foreign laws and regulations concerning the development of our product candidates outside of the United States, including the European Union, or EU, and China.

***European Union Drug Development***

In the EU, our product candidates also will be subject to extensive regulatory requirements. As in the United States, medicinal products can be marketed only if a marketing authorization from the competent regulatory agencies has been obtained, and the various phases of preclinical and clinical research in the EU are subject to significant regulatory controls.

In April 2014, the EU adopted the Clinical Trials Regulation EU No 536/2014, or Clinical Trials Regulation, which replaced the Clinical Trials Directive 2001/20/EC on January 31, 2022. All clinical trials in the EU must now be conducted in accordance with the Clinical Trials Regulation. This regulation aims at simplifying and streamlining the approval of clinical trials in the EU; for example, the Clinical Trials Regulation provides for a streamlined application procedure via a single entry point (the Clinical Trials Information System, or CTIS), and also establishes rules on the protection of subjects and informed consent, transparency requirements, and strictly defined deadlines for the assessment of clinical trial applications.

In the EU, the Pediatric Committee, or PDCO, of the European Medicines Agency, or EMA, must approve the pediatric investigation plan, or PIP, prior to the filing of a marketing authorization application, or MAA, unless the EMA has granted (1) a product-specific waiver, (2) a class waiver or (3) a deferral for one or more of the measures included in the PIP. The PIP outlines the pharmaceutical company's strategy for investigation of the new medicinal product in the pediatric population. Before an MAA can be filed, or an existing marketing authorization can be amended, the EMA assesses whether companies have complied with the agreed studies and measures listed in each relevant PIP. If an applicant obtains a marketing authorization in all EU Member States, or a marketing authorization granted through the centralized procedure by the European Commission, or EC, and the study results for the pediatric population are included in the product information, even when negative, the medicine is then eligible for an additional six-month period of qualifying patent protection through extension of the term of any supplementary protection certificate, or SPC, so long as an application for this extension is made at the same time as filing the SPC application for the product, or at any point up to two years before the SPC expires. 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.

***European Union Expedited Review and Development***

PRIME, or PRIority MEdicine, is a scheme provided by the EMA to enhance support for the development of medicines that target an unmet medical need and provides the possibility for accelerated assessment of products representing substantial innovation where the MAA will be made through the centralized procedure. To qualify for PRIME, product candidates require early clinical evidence that the therapy has the potential to offer a major therapeutic advantage over existing treatments or benefits patients without treatment options. Products from small-and medium-sized enterprises, or SMEs, may qualify for earlier entry into the PRIME scheme than larger companies. Among the benefits of PRIME are the appointment of a rapporteur from the EMA's scientific committees to provide continuous support and help build knowledge ahead of an MAA, early dialogue and scientific advice at key development milestones, and the potential to qualify products for accelerated review earlier in the application process. The receipt of PRIME designation does not change the standards for approval but may expedite the development or approval process. Where, during the course of development, a product no longer meets the eligibility criteria, support under the PRIME scheme may be withdrawn.

***European Union Drug Review and Approval***

In the EU, medicinal products can only be commercialized after obtaining a marketing authorization, or MA. Centralized MAs are issued by the EC through the centralized procedure, based on the opinion of the Committee for Medicinal Products for Human Use, or CHMP, of the EMA, are valid throughout the EU, and in the additional countries (Iceland, Liechtenstein and Norway) of the EEA. The centralized procedure is mandatory for certain types of products, such as medicinal products produced by certain biotechnological processes, products designated as orphan medicinal products, advanced therapy medicinal products (i.e., gene therapy, somatic cell therapy or tissue engineered medicines) and medicinal products containing a new active substance indicated for the treatment of HIV, AIDS, cancer, neurodegenerative disorders, diabetes, autoimmune and other immune dysfunctions and viral diseases. The centralized procedure is optional for products containing a new active substance not yet authorized in the EU, or for products that constitute a significant therapeutic, scientific or technical innovation or which are in the interest of public health in the EU. National MAs are issued by the competent authorities of the EU Member States and only cover their respective territory, are available for products not falling within the mandatory scope of the centralized procedure. Under the above described procedures, before

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granting the MA, the EMA or the competent authorities of the EU 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.

A pediatric-use marketing authorization, or PUMA, is available for medicines that are already authorized, no longer covered by an SPC or patent that qualifies as an SPC and are to be exclusively developed for use in children. A PUMA is a dedicated MA covering the indication and formulation of a medicinal product developed exclusively for use in the pediatric population, where such development has been in accordance with an approved PIP. There are various incentives to apply for a PUMA, including access to the centralized procedure even where the product would otherwise fall outside the mandatory scope of this procedure.

***European Union Orphan Designation***

In the EU, the EC grants orphan designation in respect of a product, after receiving the opinion of the EMA's Committee for Orphan Medicinal Products, if its sponsor can establish that: (1) the product is intended for the diagnosis, prevention or treatment of a life-threatening or chronically debilitating condition; (2) either (i) such condition affects no more than five in 10,000 persons in the EU when the application is made, or (ii) it is unlikely that the product, without the benefits derived from orphan status, would generate sufficient return in the EU to justify the necessary investment in its development; and (3) there exists no satisfactory method of diagnosis, prevention or treatment of such condition authorized for marketing in the EU, or, if such a method exists, the product would be a significant benefit to those affected by that condition.

In the EU, orphan designation entitles a party to financial incentives such as reduction of fees or fee waivers and 10 years of market exclusivity is granted following the grant of an MA. During this market exclusivity period, neither the EMA nor the EC nor any of the competent authorities in the EU Member States can accept an application or grant an MA for a "similar medicinal product," except in limited circumstances. A "similar medicinal product" is defined as a medicinal product containing a similar active substance or substances as contained in an authorized orphan medicinal product, and which is intended for the same therapeutic indication. This period may be reduced to six years if, at the end of the fifth year, it is established that the orphan designation criteria are no longer met, including where it is shown that the product is sufficiently profitable not to justify maintenance of market exclusivity. An MA may be granted to a similar medicinal product to an authorized orphan product in very select cases, such as if: (i) it is established that a similar medicinal product is safer, more effective or otherwise clinically superior to the authorized orphan product; (ii) the MA holder for the authorized orphan product consents to the authorization of the similar medicinal product; or (iii) the MA holder for the authorized orphan product cannot supply enough orphan medicinal product. Orphan designation must be requested before submitting an application for an MA. Orphan designation does not convey any advantage in, or shorten the duration of, the regulatory review and approval process. All of the aforementioned EU rules are generally applicable in the EEA.

***Drug Development in China***

All clinical trials conducted in China for the purpose of seeking marketing approvals must be approved by the China National Medical Products Administration, or NMPA, and conducted at hospitals satisfying GCP requirements. In addition to a standalone China trial to support development, imported drug applicants may include Chinese clinical sites as part of an international multi-center trial, or IMCT. Domestically manufactured drugs are not subject to foreign approval requirements, and in contrast to prior practice, the NMPA has decided to permit those drugs to conduct development via an IMCT as well.

The Drug Administration Law of the PRC, which was revised in 2019, or the rDAL, has now adopted an implied approval system for clinical trials of new drugs. Trials can proceed if, after 60 business days, the applicant has not received any objections from the Center for Drug Evaluation, or CDE, as opposed to the lengthier previous clinical trial pre-approval process in which the applicant had to wait for affirmative approval. The rDAL also expands the number of trial sites by abolishing the GCP accreditation system and requiring trial sites to follow a more simplified notification procedure.

The NMPA finalized in November 2021 the Guideline on Clinical Value-Oriented Research and Development for Oncology Drugs as part of its policies intended to encourage the research and development of innovative oncology drugs with significant clinical value, and discourage repeated research and development of "me-too" drugs with minimal or no clinical value to patients.

Clinical trials conducted in China must be registered and published through the Drug Clinical Trial Information Platform (http://www.chinadrugtrials.org.cn). Applicants are required to pre-register the trial information within one month after obtaining the clinical trial approval to obtain the trial's unique registration number and to complete registration of certain follow-up information before the first subject's enrollment in the trial. If the foregoing pre-registration and registration is not obtained within one year after obtaining the clinical trial approval, the applicant shall submit an explanation, and if the procedure is not completed within three years, the clinical trial approval automatically expires.

***Other Healthcare Laws***

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Healthcare providers, physicians and third-party payors will play a primary role in the recommendation and prescription of any products for which we obtain marketing approval. Our business operations and any current or future arrangements with third-party payors, healthcare providers and physicians may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may constrain the business or financial arrangements and relationships through which we develop, market, sell and distribute any drugs for which we obtain marketing approval. In the United States, these laws include, without limitation, state and federal anti-kickback, false claims, physician transparency and patient data privacy and security laws and regulations, including but not limited to those described below.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The federal Anti-Kickback Statute, which prohibits, among other things, persons and entities from knowingly and willfully soliciting, offering, paying, receiving or providing any remuneration (including any kickback, bride or certain rebate), directly or indirectly, overtly or covertly, in cash or in kind, to induce or reward or in return for, either the referral of an individual for, or the purchase order or recommendation of, any good or service, for which payment may be made, in whole or in part, under a federal healthcare program such as Medicare and Medicaid. A person or entity need not have actual knowledge of the federal Anti-Kickback Statute or specific intent to violate it in order to have committed a violation. There are a number of statutory exceptions and regulatory safe harbors protecting some common activities from prosecution. Violations are subject to civil and criminal fines and penalties for each violation, plus up to three times the remuneration involved, imprisonment, and exclusion from government healthcare programs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The federal civil and criminal false claims laws, including the civil False Claims Act, or FCA, which prohibit individuals or entities from, among other things, knowingly presenting or causing to be presented, to the federal government, claims for payment or approval that are false, fictitious or fraudulent; knowingly making, using or causing to be made or used a false statement or record material to a false or fraudulent claim or obligation to pay or transmit money or property to the federal government; or knowingly concealing or knowingly and improperly avoiding or decreasing an obligation to pay money to the federal government. Manufacturers can be held liable under the FCA even when they do not submit claims directly to government payors if they are deemed to "cause" the submission of false or fraudulent claims. In addition, the government may assert that a claim that includes items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the civil False Claims Act. The FCA also permits a private individual acting as a "whistleblower" to bring actions on behalf of the federal government alleging violations of the FCA and to share in any monetary recovery;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The federal civil monetary penalties laws, which impose civil fines for, among other things, the offering or transfer or remuneration to a Medicare or state healthcare program beneficiary if the person knows or should know it is likely to influence the beneficiary's selection of a particular provider, practitioner or supplier of services reimbursable by Medicare or a state health care program, unless an exception applies. The government may also assert that a claim including items or services resulting from a violation of the federal Anti-Kickback statute constitutes a false or fraudulent claim under federal civil monetary penalties laws;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Health Insurance Portability and Accountability Act of 1996, or HIPAA, imposes criminal and civil liability for knowingly and willfully executing a scheme or attempting to execute a scheme, to defraud any healthcare benefit program, including private payors, knowingly and willfully embezzling or stealing from a healthcare benefit program, willfully obstructing a criminal investigation of a healthcare offense or falsifying, concealing or covering up a material fact or making any materially false statements in connection with the delivery of or payment for healthcare benefits, items or services. Similar to the federal Anti-Kickback Statute, a person or entity need not have actual knowledge of the statute or specific intent to violate it in order to have committed a violation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009, or HITECH, and their respective implementing regulations, imposes, among other things, specified requirements on covered entities and their business associates relating to the privacy and security of individually identifiable health information including mandatory contractual terms and required implementation of technical safeguards of such information. HITECH also created new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly applicable to business associates in some cases, and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorneys' fees and costs associated with pursuing federal civil actions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Physician Payments Sunshine Act, enacted as part of the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010, or collectively, the ACA, imposed new annual reporting requirements for certain manufacturers of drugs, devices, biologics and medical supplies for which payment is available under Medicare, Medicaid or the Children's Health Insurance Program, for certain

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payments and "transfers of value" provided to physicians (defined to include doctors, dentists, optometrists, podiatrists and chiropractors), certain other licensed health care practitioners and teaching hospitals, as well as ownership and investment interests held by such physicians and their immediate family members; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Analogous state and foreign laws and regulations, such as state anti-kickback and false claims laws, which 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 may be broader in scope than their federal equivalents; state and foreign laws require pharmaceutical companies to comply with the pharmaceutical industry's voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government or otherwise restrict payments that may be made to healthcare providers; state and foreign laws that require drug manufacturers to report information related to drug pricing and payments and other transfers of value to physicians and other healthcare providers and restrict marketing practices or require disclosure of marketing expenditures and pricing information; state and local laws that require the registration of pharmaceutical sales representatives; state and foreign laws that govern the privacy and security of health information in some circumstances. These data privacy and security laws may differ from each other in significant ways and often are not pre-empted by HIPAA, which may complicate compliance efforts. Furthermore, some states have passed laws that require pharmaceutical companies to comply with the April 2003 Office of Inspector General Compliance Program Guidance for Pharmaceutical Manufacturers and/or the Pharmaceutical Research and Manufacturers of America's Code on Interactions with Healthcare Professionals.

In addition, pharmaceutical manufacturers may also be subject to federal and state consumer protection and unfair competition laws and regulations, which broadly regulate marketplace activities and that potentially harm consumers.

The distribution of drugs and biological products is subject to additional requirements and regulations, including extensive record-keeping, licensing, storage and security requirements intended to prevent the unauthorized sale of pharmaceutical products.

The full scope and enforcement of each of these laws is uncertain and subject to rapid change in the current environment of healthcare reform. Federal and state enforcement bodies have continued to increase their scrutiny of interactions between healthcare companies and healthcare providers, which has led to a number of investigations, prosecutions, convictions and settlements in the healthcare industry. It is possible that governmental authorities will conclude that our business practices do not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other related governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, damages, fines, imprisonment, disgorgement, exclusion from government funded healthcare programs, such as Medicare and Medicaid, reputational harm, additional oversight and reporting obligations if we become subject to a corporate integrity agreement or similar settlement to resolve allegations of non-compliance with these laws and the curtailment or restructuring of our operations. If any of the physicians or other healthcare providers or entities with whom we expect to do business is found to be not in compliance with applicable laws, they may be subject to similar actions, penalties and sanctions. Ensuring business arrangements comply with applicable healthcare laws, as well as responding to possible investigations by government authorities, can be time- and resource-consuming and can divert a company's attention from its business.

***Coverage and Reimbursement***

In the United States and markets in other countries, patients who are prescribed treatments for their conditions and providers performing the prescribed services generally rely on third-party payors to reimburse all or part of the associated healthcare costs. Thus, even if a product candidate is approved, sales of the product will depend, in part, on the extent to which third-party payors, including government health programs in the United States such as Medicare and Medicaid, commercial health insurers and managed care organizations, provide coverage and establish adequate reimbursement levels for, the product. In the United States, no uniform policy of coverage and reimbursement for drug products exists among third-party payors. Therefore, coverage and reimbursement for drug products can differ significantly from payor to payor. The process for determining whether a third-party 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 regulatory approvals. Additionally, companies

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may also need to provide discounts to purchasers, private health plans or government healthcare programs. Nonetheless, product candidates may not be considered medically necessary or cost effective. A decision by a third-party payor not to cover a product could reduce physician utilization once the product is approved and have a material adverse effect on sales, our operations and financial condition. Additionally, a third-party 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 healthcare costs 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 payor 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 regulatory approval, less favorable coverage policies and reimbursement rates may be implemented in the future.

***Healthcare Reform***

In the United States and some foreign jurisdictions, there have been, and likely will continue to be, a number of legislative and regulatory changes and proposed changes regarding the healthcare system directed at broadening the availability of healthcare, improving the quality of healthcare and containing or lowering the cost of healthcare. For example, in 2010, the United States Congress enacted the ACA, which, among other things, included changes to the coverage and payment for products under government health care programs. The ACA included provisions of importance to our potential product candidate that:

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• expanded eligibility criteria for Medicaid programs, thereby potentially increasing a manufacturer's Medicaid rebate liability;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• expanded manufacturers' rebate liability under the Medicaid Drug Rebate Program;

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a licensure framework for follow-on biologic products;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• establishment of a Center for Medicare & Medicaid Innovation at CMS to test innovative payment and service delivery models to lower Medicare and Medicaid spending, potentially including prescription drug spending;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• established the Medicare Part D coverage gap discount program by requiring manufacturers to provide 70% point-of-sale-discounts off the negotiated price of applicable brand drugs to eligible beneficiaries during their coverage gap period as a condition for the manufacturers' outpatient drugs to be covered under Medicare Part D; and

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

Other legislative changes have been proposed and adopted in the United States since the ACA was enacted. In August 2011, the Budget Control Act of 2011, among other things, included aggregate reductions of Medicare payments to providers of 2% per fiscal year that will remain in effect through 2031. The American Taxpayer Relief Act of 2012, among other things, further reduced Medicare payments to several providers, including hospitals, imaging centers and cancer treatment centers and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. The American Rescue Plan Act of 2021 eliminated the statutory Medicaid drug rebate cap, previously set at 100% of a drug's average manufacturer price, for single source and innovator multiple source drugs, effective January 1, 2024. These laws and regulations may result in additional reductions in Medicare and other healthcare funding and otherwise affect the prices we may obtain for any of our product candidates for which we may obtain regulatory approval or the frequency with which any such product candidate is prescribed or used.

The Inflation Reduction Act of 2022 (the "IRA") also included several provisions that could impact our business to varying degrees, including provisions that reduce the out-of-pocket cap for Medicare Part D beneficiaries to $2,000 starting in 2025, impose new manufacturer financial liability on certain drugs in Medicare Part D, allow the United States government to negotiate Medicare Part B and Part D price caps for certain high-cost drugs and biologics without generic or biosimilar

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competition, require companies to pay rebates to Medicare for certain drug prices that increase faster than inflation, and delay the rebate rule that would limit the fees that pharmacy benefit managers can charge. Further, under the IRA, orphan drugs are exempted from the Medicare drug price negotiation program, but only if they have one or more orphan disease designations and their only approved indications are for a rare disease or condition. If a product receives multiple rare disease designations or has multiple approved indications, it will not qualify for the orphan drug exemption. The implementation of the IRA is currently subject to ongoing litigation challenging the constitutionality of the IRA's Medicare drug price negotiation program. The future of the IRA and its impact on our business and the healthcare industry in general is not yet known.

In addition, the One Big Beautiful Bill Act of 2025 imposed significant reductions in Medicaid funding, additional work requirements for certain Medicaid beneficiaries and more frequent eligibility redeterminations. These changes are expected to place increased pressure on state Medicaid budgets and could reduce enrollment, utilization and reimbursement levels for prescription drugs, including our products, which could adversely affect our business.

The costs of prescription pharmaceuticals have also been the subject of considerable discussion in the United States. To date, there have been several recent U.S. congressional inquiries, as well as proposed and enacted federal and state legislation designed to, among other things, bring more transparency to drug pricing, review the relationship between pricing and manufacturer patient programs, reduce the costs of drugs under Medicare and reform government program reimbursement methodologies for drug products. The Trump Administration has issued executive orders and supported proposed regulatory initiatives in 2025 that could have a significant impact on the prices that we, or any collaborators, may receive for any approved products.

On May 12, 2025, President Trump signed an executive order directing the Secretary of HHS to set and communicate most-favored-nation ("MFN") price targets to manufacturers and propose a rulemaking plan to impose MFN pricing if "significant progress" is not made, and also directing the federal government to support regulatory paths to allow direct-to-patient sales for companies that meet these targets. The executive order further states that the Administration will take additional action (for example, examining whether marketing approvals should be modified or rescinded or considering individual drug importation waiver authorities) should manufacturers fail to offer American consumers the MFN lowest price. In July 2025, President Trump sent letters to certain pharmaceutical companies demanding that these companies extend MFN pricing to Medicaid and newly launched drugs as well as move to direct-to-consumer models priced at MFN pricing, and soliciting binding commitments by September 29, 2025. Since this time, multiple drug manufacturers have announced plans to, for certain of their drugs, lower prices to reflect similar pricing around the world, and to sell these reduced-price drugs on a direct-to-consumer purchasing platform developed by the federal government; however, it is not known what results will occur to the extent the recipients of these letters do not reduce their U.S. prices.

On December 19, 2025, CMS released two proposed rules that would incorporate MFN pricing principles into federal reimbursement for prescription drugs. The first proposal, the Global Benchmark for Efficient Drug Pricing Model ("GLOBE") for Medicare Part B, would require manufacturers of specified single source drugs and sole source biologics to pay incremental rebates based on international benchmark prices, with participation triggered for products meeting CMS's spending and eligibility criteria. The second proposal, the Guarding U.S. Medicare Against Rising Drug Costs ("GUARD") model for Medicare Part D, would similarly mandate manufacturer rebates for qualifying sole source drugs where the Medicare net price exceeds an MFN benchmark derived from international reference pricing methodologies. As proposed, GLOBE would begin a five year performance period on October 1, 2026 and GUARD would begin its performance period in 2027. These proposals will likely be subject to legal challenges that could delay their implementation or modify their impact on manufacturer pricing and revenue. Additionally, in November 2025, CMS introduced the GENErating cost Reductions fOr U.S. Medicaid ("GENEROUS") Model, a voluntary MFN framework for manufacturers participating in the Medicaid Drug Rebate Program. Although it is voluntary, the GENEROUS Model could also impact the drug pricing landscape for manufacturers.

Individual states in the United States have also increasingly passed legislation and implemented 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. For example, we may face competition in the United States for our development candidates and investigational medicines, if approved, from therapies sourced from foreign countries that have placed price controls on pharmaceutical products. In the United States, the FDA issued a final guidance document outlining a pathway for manufacturers to obtain an additional National Drug Code for an FDA-approved drug that was originally intended to be marketed in a foreign country and that was authorized for sale in that foreign country. The market implications of the final guidance are unknown at this time. Proponents of drug reimportation may attempt to pass legislation that would directly allow reimportation under certain circumstances. For example, the FDA works with states and Indian Tribes that propose to develop Section 804 Importation Programs for eligible prescription drugs from Canada in accordance with the Medicare Prescription Drug, Improvement, and Modernization Act of 2003. In January 2024 the FDA

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authorized a Section 804 importation program proposed by Florida, and several other states have pending proposals before the FDA. If successfully implemented, importation of drugs from Canada may materially and adversely affect the price we receive for any of our product candidates. Other legislation or regulations allowing the reimportation of drugs, if enacted, could decrease the price we receive for any products that we may develop and adversely affect our future revenues and prospects for profitability. Further, legally mandated price controls on payment amounts by third-party payors or other restrictions could adversely affect our business prospects, financial condition and results of operations. In addition, regional healthcare 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 healthcare programs. This could reduce the ultimate demand for our product candidates or put pressure on our product pricing.

Outside the United States, ensuring coverage and adequate payment for a product also involves challenges. Pricing of prescription pharmaceuticals is subject to government control in many countries. For example, in Canada, price control legislation for patented medicines is currently undergoing significant change that may have significant effects on profitability for companies selling products in Canada. Pricing negotiations with government authorities can extend well beyond the receipt of regulatory approval for a product and may require a clinical trial that compares the cost-effectiveness of a product to other available therapies. The conduct of such a clinical trial could be expensive and result in delays in commercialization.

**Human Capital Resources** 

As of December 31, 2025, we had 104 full-time employees, including 40 employees with an M.D. and/or Ph.D. degree. Of these full-time employees, 69 employees were engaged in research and development activities and 35 employees were engaged in general and administrative activities. We currently have seven senior leaders, six of whom serve as executive officers. None of our employees are represented by a labor union or covered by a collective bargaining agreement. We consider our relationship with our employees to be good.

We believe that our future success depends upon our continued ability to attract and retain highly skilled employees. We provide our employees with competitive salaries and bonuses, opportunities for equity ownership, development programs that enable continued learning and growth and a robust employment package that promotes well-being across all aspects of their lives, including health care, retirement planning and paid time off. As part of our promotion and retention efforts, we also invest in ongoing development.

We are committed to creating an inclusive workplace where all employees can flourish, contribute and be their best. We have focused on creating a foundation of psychological safety, training leaders and employees on inclusive workplace practices, equitable pay practices and supporting employees with wellness programs that allow employees to bring their full selves to work each day. We support our local community in their efforts to bridge the opportunity gap for underserved communities. We believe this focus on a strong corporate culture, being a strong corporate citizen and fostering an inclusive work environment that embraces diversity in perspectives and experiences is a critical component to business success.

**Corporate Information**

We were incorporated in October 2015 under the laws of the State of Delaware. Our principal executive offices are located at 490 Arsenal Way, Suite 120, Watertown, Massachusetts 02472, and our telephone number is (617) 231-0700. We have one wholly owned subsidiary, C4T Securities Corporation, a Massachusetts corporation.

**Available Information**

Our website address is www.c4therapeutics.com. Information on our website is not incorporated by reference herein. We will make available on our website, free of charge, our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, including exhibits, and any amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. The SEC maintains an Internet site, http://www.sec.gov, containing reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

A copy of our Corporate Governance Guidelines, Code of Business Conduct and Ethics and the charters of the (i) Audit Committee, (ii) Organization, Leadership and Compensation Committee, and (iii) Nominating and Corporate Governance Committee are posted on our website, www.c4therapeutics.com, under the heading "Corporate Governance" and are available in print to any person who requests copies by contacting us by calling (617) 231-0700 or by writing to C4 Therapeutics, Inc., 490 Arsenal Way, Suite 120, Watertown, Massachusetts 02472, Attention: Corporate Secretary.

We intend to use press releases, our company website, including our Investor Relations website, and our LinkedIn, and Twitter accounts, which are listed below, as a means of disclosing material non-public information and for complying with our disclosure obligations under Regulation FD.

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![Capture.jpg](cccc-20251231_g6.jpg) www.linkedin.com/company/c4-therapeutics-inc

.![X logo.jpg](cccc-20251231_g7.jpg)https://twitter.com/C4Therapeutics

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**Item 1A. Risk Factors.**

*Investing in our common stock involves a high degree of risk. You should carefully consider the risks described below together with all the other information in this Annual Report on Form 10-K, including the section titled "Management's Discussion and Analysis of Financial Condition and Results of Operations" and our financial statements and related notes appearing at the end of this Annual Report on Form 10-K, in evaluating our company. The risks and uncertainties described below and in our other filings with the SEC, may not be the only ones that we face. The occurrence of any of the events or developments described below, if they actually occur, could harm our business, financial condition, results of operations and growth prospects. As a result, the market price of our common stock could decline, and you may lose all or part of your investment in our common stock.* 

**Risks related to our financial position and need for additional capital** 

***We are a clinical-stage biopharmaceutical company and have incurred significant losses since our inception. We expect to incur losses over at least the next several years and may never achieve or maintain profitability.***

We are a clinical-stage biopharmaceutical company with limited operating history. Our net loss was $105.0 million and $105.3 million for the years ended December 31, 2025 and 2024, respectively. As of December 31, 2025, we had an accumulated deficit of $738.7 million. To date, we have not generated any revenue from product sales and have financed our operations primarily through sales of our equity interests, including public offerings of our common stock, proceeds from our collaborations, share issuances and debt financing. We are still in the early stages of development of our product candidates. As a result, we expect that it will be several years, if ever, before we have a product candidate ready for regulatory approval and commercialization. We may never succeed in these activities and, even if we do, may never generate revenues that are significant enough to achieve profitability. To become and remain profitable, we must succeed in developing, obtaining marketing approval for, and commercializing products that generate significant revenue. This will require us to be successful in a range of challenging activities, including, without limitation, successfully completing preclinical studies and clinical trials of our product candidates, discovering additional product candidates, establishing arrangements with third parties for the conduct of our clinical trials, procuring clinical and commercial-scale manufacturing, obtaining marketing approval for our product candidates, manufacturing, marketing and selling any products for which we may obtain marketing approval, identifying collaborators to develop product candidates we identify or additional uses of existing product candidates, and successfully completing development of product candidates for our collaboration partners.

We expect to continue to incur significant expenses and increasing operating losses for at least the next several years. We anticipate that our expenses will increase substantially if and as we:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• initiate, conduct, and successfully complete first-in-human and later-stage clinical trials of our product candidates and as we expand the scope of our proprietary research and development portfolios;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• leverage our TORPEDO platform to identify and then advance additional product candidates into preclinical and clinical development;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• expand the capabilities of our TORPEDO platform;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• seek marketing approvals for any product candidates that successfully complete clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• ultimately establish a sales, marketing, and distribution infrastructure and scale up external manufacturing capabilities to commercialize any products for which we expect to obtain marketing approval;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• advance, expand, maintain, and protect our intellectual property portfolio; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• manage staffing needs to meet the changing needs of the business as we advance additional product candidates and/or continue to develop existing product candidates.

Further, we expect to continue to incur additional costs associated with operating as a public company, including significant legal, accounting, insurance, investor relations, and other expenses.

Our expenses could increase beyond our expectations if we are required by the FDA, the European Medicines Agency, or other regulatory authorities to perform trials in addition to those that we currently expect, or if we experience any delays in either establishing appropriate manufacturing arrangements for or completing our clinical trials or the clinical development of any of our product candidates.

Because of the numerous risks and uncertainties associated with pharmaceutical product development, we are unable to accurately predict the timing or amount of increased expenses we will incur or when, if ever, we will be able to achieve

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profitability. Even if we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to become and remain profitable would depress the value of our company and could impair our ability to raise capital, maintain our research and development efforts, expand our business or continue operations. A decline in the value of our company, or in the value of our common stock, could also cause you to lose all or part of your investment.

If one or more of the product candidates that we develop is approved for commercial sale, we anticipate incurring significant costs associated with commercializing those approved products. Even if we are able to generate revenues from the sale of any approved products, we may not become profitable and may need to obtain additional funding to continue operations.

***We will need substantial additional funding to pursue our business objectives and continue our operations. If we are unable to raise capital when needed, we may be required to delay, limit, reduce, or terminate our research or product development programs or future commercialization efforts.***

We expect our expenses to increase substantially in connection with our ongoing activities, particularly as we prepare for and initiate, conduct, and complete our ongoing and planned first-in-human Phase 1/2 clinical trials of our product candidates, advance our TORPEDO platform and continue research and development activities, expand our proprietary research and development portfolios and initiate and continue clinical trials of, and potentially seek marketing approval for, our current and future preclinical programs. In addition, if we obtain marketing approval for any of our product candidates, we expect to incur significant commercialization expenses related to product manufacturing, marketing, sales, and distribution. Further, we expect to continue to incur additional costs associated with operating as a public company. Accordingly, we will need to obtain substantial additional funding in connection with our continuing operations. If we are unable to raise capital when needed or on attractive terms, we may be required to delay, limit, reduce or terminate our research, product development programs or any future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

We had cash, cash equivalents, and marketable securities of approximately $297.1 million as of December 31, 2025. In October 2025, we sold 21,895,000 shares, or the Shares, of our common stock and, in lieu of common stock to certain investors, pre-funded warrants to purchase 28,713,500 shares of common stock, or the Pre-Funded Warrants, as well as accompanying Class A warrants to purchase an aggregate of 50,608,500 shares of our common stock (or, for those investors who so choose, pre-funded warrants), or the Class A Warrants, and Class B warrants to purchase an aggregate of 50,608,500 shares of our common stock (or, for those investors who so choose, pre-funded warrants), or the Class B Warrants, in an underwritten offering, or the 2025 Offering. We received net proceeds of approximately $117.0 million, after deducting the underwriting discount and commissions and estimated offering expenses. We believe that together these funds will be sufficient to fund our planned operating expenses until the end of 2028. We have based this estimate on assumptions that may prove to be wrong, and we could deplete our current capital resources sooner than we currently expect. We cannot predict whether any Pre-Funded Warrants, Class A Warrants, or Class B Warrants issued in the 2025 Offering will be exercised and, therefore, have not included any anticipated proceeds from the potential exercise of these warrants in our estimate of our cash runway.

Our future capital requirements will depend on many factors, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the timing, progress, costs, and results of our ongoing and planned first-in-human Phase 1/2 clinical trials for our product candidates and any future clinical development of those product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the scope, progress, costs, and results of clinical development stage programs and our other product candidates and development programs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the number and development requirements of other product candidates that we pursue;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the success of our ongoing collaborations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs, timing, and outcomes of regulatory review of our product candidates;

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the revenue, if any, received from commercial sales of our product candidates for which we receive marketing approval and the timing of the receipt of any such revenue;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any delays or interruptions, including delays due to any global health epidemics, that we experience in our preclinical studies, clinical trials, and/or supply chain;

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to establish collaboration arrangements with other biotechnology or pharmaceutical companies on favorable terms, if at all, for the development or commercialization of our product candidates or access to our TORPEDO platform.

Our current cash, cash equivalents, and marketable securities will not be sufficient for us to fund any of our product candidates through regulatory approval. As a result, we will need to raise substantial additional capital to complete the development and commercialization of our product candidates. Identifying potential product candidates and conducting preclinical studies and clinical trials is a time-consuming, expensive and uncertain process that takes years to complete. We may never generate the necessary data or results required to obtain marketing approval and achieve product sales. In addition, our product candidates, if approved, may not achieve commercial success. Our commercial revenues, if any, will be derived from sales of products that we do not expect to be commercially available for several years, if at all. Adequate additional funds may not be available to us on acceptable terms, or at all. In addition, we may seek additional capital due to favorable market conditions or strategic considerations, even if we believe we have sufficient funds for our current or future operating plans.

If one or more of the product candidates that we develop is approved for commercial sale, we anticipate incurring significant costs associated with commercializing those approved products. Even if we are able to generate revenues from the sale of any approved products, we may not become profitable and may need to obtain additional funding to continue operations.

***We remain early in the development lifecycle, which may make it difficult for you to evaluate the success of our business to date and assess our future viability.***

We commenced operations in late 2015 and initiated our first Phase 1/2 clinical trial in 2021. Our activities to date have been limited to organizing and staffing our company, business planning, raising capital, conducting discovery and research activities, filing patent applications, identifying potential product candidates, developing and advancing our TORPEDO platform, undertaking preclinical studies, establishing arrangements with third parties for the manufacture of initial quantities of our product candidates, and preparing for and conducting early-stage clinical trials. While we have conducted clinical trials and our partner Betta Pharma is conducting a clinical trial evaluating one of our product candidates, all of our other potential product candidates are still in the discovery stage. We have not yet demonstrated our ability to obtain marketing approvals, manufacture a commercial-scale product directly or through a third party or conduct sales, marketing, and distribution activities necessary for successful product commercialization. Consequently, any predictions you make about our future success or viability may not be as accurate as they could be if we had a longer operating history or if we had already successfully completed some or all of these types of activities in the past.

In addition, as a biopharmaceutical company, we may encounter unforeseen expenses, difficulties, complications, delays, and other known and unknown challenges. We will need to transition at some point from a company with a research and development focus to a company capable of supporting commercial activities and we may not be successful in making that transition.

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

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

Until the time, if ever, when we can generate substantial revenue from product sales, we expect to finance our cash needs through a combination of equity offerings, share issuances, private placements, debt financings, collaborations, strategic alliances, and marketing, distribution or licensing arrangements. Although we may receive potential future payments under our collaborations, we do not currently have any committed external source of funds. If we raise additional capital through the sale of equity or convertible debt securities, your ownership interest will be diluted and the terms of any securities we may issue in the future may include liquidation or other preferences that adversely affect your rights as a common stockholder. Debt financing and preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making acquisitions, or capital expenditures or declaring dividends.

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

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**Risks related to the discovery and development of our product candidates**

***Our approach to the discovery and development of product candidates based on our TORPEDO platform for targeted protein degradation is unproven, which makes it difficult to predict the time, cost of development, and likelihood of successfully developing any products.***

Treating diseases using targeted protein degradation is a new treatment modality. Our future success depends on the successful development of this novel therapeutic approach. Very few small molecule product candidates using targeted protein degradation, such as those developed through our TORPEDO platform, have been tested in humans and none of the product candidates developed through our TORPEDO platform have been approved in the United States, Europe, or any other jurisdiction. The data underlying the feasibility of developing these types of therapeutic products is both preliminary and limited. If any adverse learnings are made by other developers of targeted protein degraders, there is a risk that development of our product candidates could be materially impacted. Discovery and development of small molecules that harness the ubiquitin proteasome pathway to degrade protein targets have been impeded largely by the complexities and limited understanding of the functions, biochemistry, and structural biology of the specific components of the ubiquitin-proteasome system, including E3 ligases and their required accessory proteins involved in target protein ubiquitination, as well as by challenges of engineering compounds that promote protein-to-protein interactions.

The scientific research that forms the basis of our efforts to develop our degrader product candidates under our TORPEDO platform is ongoing and the scientific evidence to support the feasibility of developing TORPEDO platform-derived therapeutic treatments is both preliminary and limited. Further, certain cancer patients have shown inherent primary resistance to approved drugs that inhibit disease-causing proteins, and other patients have developed acquired secondary resistance to these inhibitors. Although we believe our product candidates may have the ability to degrade the specific mutations that confer resistance to currently marketed inhibitors of disease-causing enzymes, any inherent primary or acquired secondary resistance to our product candidates in patients would prevent or diminish their clinical benefit, as would be the case if the scientific research that forms the basis of our efforts proves to be contradicted.

While we have conducted early-stage clinical trials, at this time, we have not yet completed a late stage or registrational clinical trial of any product candidate. As a result, we are continuing to assess the safety of our lead product candidate in patients. Although some of our earlier-stage product candidates have produced observable results in animal studies, these product candidates may not demonstrate the same chemical and pharmacological properties in humans and may interact with human biological systems in unforeseen, ineffective or harmful ways. As a result, there could be adverse effects from treatment with any of our current or future product candidates that we cannot predict at this time.

Additionally, the regulatory approval process for novel product candidates such as ours can be more expensive and take longer than for other, better-known or extensively studied product candidates. Although other companies are also developing therapeutics based on targeted protein degradation, no regulatory authority has granted approval for any therapeutic of this nature at this time. As a result, it is more difficult for us to predict the time and cost of developing our product candidates and we cannot predict whether the application of our TORPEDO platform, or any similar or competitive protein degradation platforms, will result in the development of product candidates that may receive marketing approval. Any development problems we experience in the future related to our TORPEDO platform or any of our research programs may cause significant delays or unanticipated costs or may prevent the development of a commercially viable product. Any of these factors may prevent us from completing our preclinical studies or any clinical trials that we may initiate, as well as from commercializing any product candidates we may develop on a timely or profitable basis, if at all.

***We are a clinical stage biotechnology company and, while we have commenced clinical trials of certain of our product candidates, our other product candidates are still in the discovery stage. If we are unable to advance to clinical development, develop, obtain regulatory approval for and commercialize our product candidates or experience significant delays in doing so, our business may be materially harmed.***

We are a clinical-stage biotechnology company and, while we have product candidates in ongoing clinical trials, our other product candidates are currently in the discovery stage. As a result, the risk of failure of such product candidates is high. We have invested substantially all of our research and development efforts and associated financial resources into building our TORPEDO platform and identifying and conducting preclinical development of our current product candidates. Our ability to generate revenue from product sales, which we do not expect will occur for several years, if ever, will depend heavily on the successful development and eventual commercialization of one or more of our product candidates. The success of our product candidates will depend on several factors, including the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• sufficiency of our financial and other resources;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• successful initiation of clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• successful patient enrollment in, and conduct and completion of, clinical trials;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• receipt and related terms of marketing approvals from applicable regulatory authorities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• obtaining and maintaining patent or trade secret protection and regulatory exclusivity for our product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• making suitable arrangements with third-party manufacturers for both clinical and, if approved, commercial supplies of our product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• developing product candidates that achieve the therapeutic properties desired and appropriate for their intended indications;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• establishing sales, marketing and distribution capabilities, and launching commercial sales of our products, if approved, whether alone or in collaboration with others;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• acceptance of our products, if and when approved, by patients, the medical community, and third-party payors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• obtaining and maintaining third-party coverage and adequate reimbursement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• establishing a continued acceptable safety profile of our products and maintaining that profile following approval;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• effectively competing with other therapies; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the skill and success of our third-party collaboration partners in accomplishing any of the aforementioned activities in the markets in which they are developing our product candidate(s) in a timely manner.

If we do not successfully achieve one or more of these objectives in a timely manner, or at all, we could experience significant delays or an inability to successfully commercialize our product candidates, which could materially harm our business. Moreover, if we do not receive regulatory approvals, we may not be able to continue our operations.

***Relative to companies that are more established than we are or that have a larger footprint than we do, we have relatively limited experience as a company in completing preclinical studies to enable the filing of INDs, submitting INDs or commencing, enrolling, and conducting clinical trials.***

Our experience as a company in completing IND-enabling preclinical studies comes from our work in commencing clinical development of our product candidates. While this work represents a substantial amount of progress, we still have relatively limited experience as a company in commencing, enrolling, and conducting clinical trials. In part because of this limited experience, while we continue to make strides in advancing our clinical trials, we cannot be certain that our planned clinical trials will begin, enroll, or be completed on time, if at all. Additionally, even if the applicable regulatory authorities agree with the design and implementation of the clinical trials set forth in our INDs upon initial IND submission, we cannot guarantee that those regulatory authorities will not change their requirements in the future. These considerations apply to previously submitted INDs described above, additional INDs that we may submit in the future and also to new clinical trials we may submit as amendments to existing or new INDs.

Further, large-scale clinical trials would require significant additional financial and management resources and reliance on third-party clinical investigators, contract research organizations, or CROs, and consultants. Relying on third-party clinical investigators, CROs and consultants may cause us to encounter delays that are outside of our control and, for each of the product candidates that is currently in clinical development, we have engaged CROs to lead our first-in-human Phase 1/2 clinical trials. Relying on third parties in the conduct of our preclinical studies or clinical trials exposes us to a risk that they may not adequately adhere to study or trial protocols or comply applicable regulations, including good laboratory practices or good clinical practices, or GCP, as required for any studies or trials we plan to submit to regulatory authorities. We may also be unable to identify and contract with sufficient investigators, CROs, and consultants on a timely basis or at all, and we may also determine and have in the past determined after a clinical trial has commenced that a change in CRO is warranted. There can be no assurance that we will be able to negotiate, enter into, and maintain appropriate contractual arrangements with our current or potential future CROs, if and when necessary for our other product candidates, on terms that are acceptable to us on a timely basis, or at all.

***Our preclinical studies and clinical trials may fail to demonstrate adequately the safety and efficacy of any of our product candidates, which would prevent or delay development, regulatory approval, and commercialization. Further, the results of preclinical studies may not be predictive of future results in later studies or trials and initial success in clinical trials may not be indicative of results obtained when these trials are completed or in later stage clinical trials.***

Before obtaining regulatory approval for the commercial sale of any of our product candidates, we must demonstrate through lengthy, complex, and expensive preclinical studies and clinical trials that our product candidates are both safe and effective for use in each target indication. This testing is expensive and can take many years to complete. Further, the outcome of these activities is inherently uncertain, as failure can occur at any time during the clinical development process. Because many of our product candidates are in an early stage of development and have either never been tested in humans or have only completed early clinical trials, there is a high risk of failure. In addition, because targeted protein degraders

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are a relatively new class of product candidates, any failures or adverse outcomes in preclinical or clinical testing seen by other developers in this class could materially impact the success of our programs. We may never succeed in developing marketable products.

It is also possible that the results of preclinical studies and early clinical trials of our product candidates may not be predictive of the results of later-stage clinical trials. Preclinical and clinical data are often susceptible to varying interpretations and analyses and many companies that have believed their product candidates performed satisfactorily in preclinical studies and clinical trials have nonetheless failed to obtain marketing approval of their product candidates. Although product candidates may demonstrate promising results in preclinical studies and early clinical trials, they may not prove to be effective or safe in subsequent clinical trials. The results of the dose escalation portion of our completed, ongoing, and planned first-in-human Phase 1/2 clinical trials of our product candidates may not be predictive of the results of further clinical trials of these product candidates or any other product candidates and, in the case of ongoing and planned first-in-human Phase 1/2 clinical trials, may not be sufficient to enable us to progress to the Phase 2 portion of a Phase 1/2 clinical trial. Testing on animals occurs under different conditions than testing in humans and, therefore, the results of animal studies may not accurately predict human experience.

There is typically an extremely high rate of attrition from the failure of product candidates proceeding through preclinical studies and clinical trials. As was the case for our CFT8634 product candidate, which was the subject of a Phase 1/2 clinical trial that we ultimately elected to shut down, product candidates in clinical trials may fail to show the desired safety and efficacy profile despite having progressed successfully through preclinical studies and/or initial or earlier stage clinical trials. Likewise, early, smaller-scale clinical trials may not be predictive of eventual safety or effectiveness in large-scale pivotal clinical trials. In particular, the small number of patients in our planned early clinical trials or the designs of these trials may make the results of these trials less predictive of the outcome of later clinical trials. Many companies in the biopharmaceutical industry have suffered significant setbacks in advanced clinical trials due to lack of efficacy, insufficient durability of efficacy or unacceptable safety issues, notwithstanding promising results in earlier trials. Most product candidates that commence preclinical studies and clinical trials are never approved as marketable products. Any setbacks of this nature in our clinical development could materially harm our business, financial condition, results of operations and prospects.

Additionally, we expect that the first clinical trials for our product candidates will be open-label studies, where both the patient and investigator know whether the patient is receiving the investigational product candidate or either an existing approved drug or placebo. This is the case with our completed and ongoing first-in-human clinical trials and will be the case in the first-in-human clinical trials of the additional product candidates we presently expect to advance into clinical development. Open-label clinical trials often test only the investigational product and sometimes do so at different dose levels. Open-label clinical trials are subject to various limitations that may exaggerate any therapeutic effect as patients in open-label clinical trials are aware or whether they are receiving treatment. In addition, open-label clinical trials may be subject to an "investigator bias," where those assessing and reviewing the physiological outcomes of the clinical trials are aware of which patients have received treatment and may interpret the information of the treated group more favorably given this knowledge.

Any preclinical studies or clinical trials that we may conduct or have conducted may not demonstrate the safety and efficacy necessary to obtain regulatory approval to market our product candidates. If the results of our ongoing or future preclinical studies or clinical trials are inconclusive with respect to the safety and efficacy of our product candidates, if evidence of target degradation does not correlate with clinical efficacy, if we do not meet the clinical endpoints with statistical and clinically meaningful significance or if there are safety concerns associated with our product candidates, we may be prevented from or delayed in obtaining marketing approval for those product candidates. In some instances, there can be significant variability in safety or efficacy results between different preclinical studies and clinical trials of the same product candidate due to numerous factors, including changes in trial procedures set forth in protocols, differences in the size and type of the patient populations, changes in and adherence to the clinical trial protocols and the rate of dropout among clinical trial participants.

While we have commenced clinical trials of several of our product candidates, and our partner Betta Pharma has commenced a clinical trial of another of our product candidates, we have not yet initiated clinical trials for the remainder of our product candidates. As is the case with all drugs, it is likely that there may be side effects associated with the use of our product candidates related to on-target toxicity, off-target toxicity, or other mechanisms of drug toxicity including chemical-based toxicity. Results of our clinical trials could reveal a high and unacceptable severity and prevalence of side effects of this nature. If unacceptable levels of toxicity are observed or if our product candidates have other characteristics that are unexpected, we may abandon their development, modify our development plans as to dose level and/or dose schedule or otherwise, or limit development to more narrow 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. For example, due to observed safety signals, we previously modified the dosing schedule in our Phase 1/2 clinical trial of cemsidomide.

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Further, if we were to observe unacceptable levels of side effects, or if other developers of similar targeted protein degraders were to find an unacceptable severity or prevalence of side effects with their drug candidates, our trials could be suspended or terminated, and the FDA or comparable foreign regulatory authorities could order us to cease further development of or deny approval of our product candidates for any or all targeted indications. Drug-related side effects could also affect patient recruitment or the ability of enrolled patients to complete an ongoing trial or result in potential product liability claims. Many compounds 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. Any of these occurrences may significantly harm our business, financial condition, and prospects.

***The conclusions and analyses drawn from announced or published interim top-line and preliminary data from our clinical trials from time to time may change as more patient data become available. Further, all interim data that we provide remains subject to audit and verification procedures that could result in material changes in the final data.***

From time to time, we may publish interim, top-line, or preliminary data from our clinical trials. Interim data from clinical trials that we may conduct 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. In addition, preliminary or top-line data also remains subject to audit and verification procedures that may result in the final data being different, potentially in material ways, from the preliminary data we previously announced or published. As a result, interim, top-line, and preliminary data should be viewed with caution until final data are available. Adverse differences between preliminary or interim data and final data could significantly harm our reputation, business, financial condition, results of operations, and prospects.

***Drug development is a lengthy and expensive process with an uncertain outcome. We may incur unexpected costs or experience delays in completing, or ultimately be unable to complete, the development and commercialization of our product candidates.***

While we have commenced clinical trials of several product candidates (either directly or through our partner, Betta Pharma), the risk of failure for all of our product candidates, whether in the discovery or clinical development stage, remains high. We are unable to predict when or if any of our product candidates will prove effective or safe in humans or will receive marketing approval. Before obtaining marketing approval from regulatory authorities for the sale of any product candidate, we must conduct extensive clinical trials to demonstrate the safety and efficacy of our product candidates in humans.

Clinical testing is expensive, difficult to design and implement, can take many years to enroll and complete and is uncertain as to the timing and outcome. A failure of one or more clinical trials can occur at any stage of the process or we may choose not to continue clinical development of a product candidate for a variety of other reasons, as we have done in the past. We may experience numerous unforeseen events during or as a result of clinical trials, which could delay or prevent our ability to receive marketing approval or commercialize our product candidates, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• delays in reaching, or the failure to reach, a consensus with regulators on clinical trial design or the inability to produce acceptable preclinical results to enable entry into human clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the supply or quality of our product candidates or other materials necessary to conduct clinical trials may be insufficient or inadequate, including as a result of delays in the testing, validation, manufacturing and delivery of product candidates to the clinical sites by us or by third parties with whom we have contracted to perform certain of those functions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• delays in reaching, or the failure to reach, agreement on acceptable clinical trial contracts or clinical trial protocols with prospective trial sites or CROs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the failure of regulators or institutional review boards, or IRBs, to authorize us or our investigators to commence a clinical trial or conduct a clinical trial at a prospective trial site;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• difficulty in designing clinical trials and in selecting endpoints for diseases that have not been well studied and for which the natural history and course of the disease is poorly understood;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the selection of certain clinical endpoints that may require prolonged periods of clinical observation or analysis of the resulting data;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the number of patients required for clinical trials of our product candidates may be larger than we anticipate, enrollment in these clinical trials may be slower than we anticipate, participants may drop out of these clinical trials at a higher rate than we anticipate or fail to return for post-treatment follow-up or we may be unable to recruit suitable patients to participate in our clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our product candidates may have undesirable side effects or other unexpected characteristics, causing us or our investigators, regulators or IRBs to suspend or terminate our clinical trials;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we may have to suspend or terminate clinical trials of our product candidates for various reasons, including if we find that the participants are being exposed to unacceptable health risks;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the third parties with whom we contract may fail to comply with regulatory requirements or meet their contractual obligations to us in a timely manner, or at all;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the requirement from regulators or IRBs that we or our investigators suspend or terminate clinical trials for various reasons, including noncompliance with regulatory requirements or unacceptable safety risks;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• clinical trials of our product candidates may produce negative or inconclusive results and we may decide, or regulators may require us, to conduct additional clinical trials, modify our development plans as to dose level and/or dose schedule or otherwise, or abandon product development programs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the cost of clinical trials of our product candidates may be greater than we anticipate or greater than we believe is warranted based on the data that emerges from clinical trials of our product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• staffing shortages, including but not limited to the lack of appropriately trained or experienced clinical research associates or medical staff at the institutions where we conduct our clinical trials or the lack of sufficient support personnel at these institutions involved in site contracting and activation, may cause delays or create other challenges to the timely and efficient conduct of our clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• imposition of a clinical hold by regulatory authorities for any reason, including as a result of a serious adverse event, concerns with a class of product candidates or after an inspection of our clinical trial operations, trial sites or manufacturing facilities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• occurrence of serious adverse events associated with the product candidate that are viewed to outweigh its potential benefits; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• disruptions caused by any global health epidemics, which may increase the likelihood that we encounter certain of these difficulties or cause other delays in initiating, enrolling, conducting, or completing our planned clinical trials.

We also may encounter challenges in our clinical development programs due to evolving regulatory policy in the United States or other jurisdictions. For example, in 2021, the FDA's Oncology Center of Excellence launched Project Optimus, an initiative to reform dose selection in oncology drug development, and this initiative is still being implemented. If the FDA believes we have not sufficiently established that the selected dose or doses for our product candidates maximize efficacy as well as safety and tolerability, the FDA may require us to conduct additional clinical trials or generate additional dosing-related information, which could significantly delay and/or increase the expense of our clinical development programs.

If we are required to conduct additional clinical trials or other testing of our product candidates beyond those that we currently contemplate, if we are unable to successfully enroll or complete clinical trials of our product candidates or other testing, if the results of these trials or tests are not positive or are only modestly positive, or if there are safety concerns related to our product candidates, we may:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• be delayed in obtaining marketing approval for our product candidates, if at all;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• obtain approval for indications or patient populations that are not as broad as intended or desired;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• obtain approval with labeling that includes significant use or distribution restrictions or safety warnings;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• be required to perform additional clinical trials to support marketing approval;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• have regulatory authorities withdraw or suspend their approval, or impose restrictions on distribution of a product candidate in the form of a risk evaluation and mitigation strategy, or REMS;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• be subject to additional post-marketing testing requirements or changes in the way the product is administered; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• have our product removed from the market after obtaining marketing approval.

Our product development costs also will increase if we experience delays in preclinical studies or clinical trials or in obtaining marketing approvals. While we have commenced clinical trials of several product candidates and our partner Betta Pharma has commenced a clinical trial of another of our product candidates, we do not know whether any of our (or our partner's) other clinical trials will begin as planned, will need to be restructured or will be completed on schedule, or at all. Significant clinical trial delays also could shorten any periods during which we may have the exclusive right to commercialize our product candidates or could allow our competitors to bring products to market before we do and impair our ability to successfully commercialize our product candidates, which may harm our business, results of operations, financial condition and prospects.

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Further, cancer therapies sometimes are characterized as first-line, second-line or third-line. The FDA often approves new oncology therapies initially only for third-line or later use, meaning for use after two or more other treatments have failed. When cancer is detected early enough, first-line therapy, usually systemic anti-cancer therapy (e.g., chemotherapy), surgery, radiation therapy or a combination of these, is sometimes adequate to cure the cancer or prolong life without a cure. Second-line and third-line therapies are administered to patients when prior therapy has been shown to not be effective. Our ongoing and planned early-stage clinical trials will be with patients who have received one or more prior treatments and we expect that we would initially seek regulatory approval of our lead product candidates as second-line or later therapy. Subsequently, for those products that prove to be sufficiently beneficial, if any, we would expect to seek approval potentially as a first-line therapy, but any product candidates we develop, even if approved for second-line or third-line therapy, may not be approved for first-line therapy and, prior to seeking and/or receiving any approvals for first-line therapy, we may have to conduct additional clinical trials.

***Targeted protein degradation is a novel modality that continues to attract substantial interest from existing and emerging biotechnology and pharmaceutical companies. As a result, we face substantial competition, which may result in others discovering, developing or commercializing products for the same indication and/or patient population before or more successfully than we do.***

The biotechnology and pharmaceutical industries are characterized by rapidly advancing technologies, intense competition and a strong emphasis on proprietary products. We face, and will continue to face, competition from third parties that use protein degradation, antibody therapy, inhibitory nucleic acid, immunotherapy, gene editing, or gene therapy development platforms and from companies focused on more traditional therapeutic modalities, such as small molecule inhibitors. The competition we face and will face is likely to come from multiple sources, including major pharmaceutical, specialty pharmaceutical and biotechnology companies, academic institutions, government agencies and public and private research institutions.

TPD is an emerging therapeutic modality that has the potential to deliver therapies that improve outcomes for patients. As a result, a number of biotechnology and pharmaceutical companies are already working to develop degradation-based therapies and the number of companies entering this space continues to increase. We are aware of several biotechnology companies developing product candidates based on chimeric small molecules for targeted protein degradation, as well as several large pharmaceutical companies and academic institutions have disclosed investments and research in this field. In addition to competition from other protein degradation therapies, any products that we develop may also face competition from other types of therapies, such as small molecule, antibody, T cell or gene therapies.

Many of our current or potential competitors, either alone or with their collaboration partners, have significantly greater financial resources and expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals, and marketing approved products than we do. These competitors also compete with us in recruiting and retaining qualified scientific and management personnel and establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our product candidates. Mergers and acquisitions in the pharmaceutical and biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors, the scale of which could be difficult to compete against. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements with large and established companies. Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are safer, more effective, have fewer or less severe side effects, are more convenient or are less expensive than any product candidate that we may develop. Our competitors also may obtain FDA or other regulatory approval for their product candidates more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market position before we are able to enter the market. In addition, our ability to compete may be affected in many cases by insurers or other third-party payors seeking to encourage the use of generic products. There are generic products currently on the market for certain of the indications that we are pursuing, and additional products are expected to become available on a generic basis over the coming years. If our product candidates are approved, we expect that they will be priced at a significant premium over competitive generic products.

***Our ability to use our net operating loss carryforwards and research and development tax credit carryforwards may be limited.***

As of December 31, 2025, we had $359.6 million federal net operating loss carryforwards and $474.9 million gross in U.S. state net operating loss carryforwards, portions of which expire at various dates through 2045. Under current law, federal net operating losses generated in tax years beginning after 2017, if any, will not expire and may be carried forward indefinitely, but our ability to deduct such federal net operating losses in tax years beginning after December 31, 2021 will be limited to the lesser of the net operating loss carryover or 80% of the corporation's adjusted taxable income (subject to Section 382 of the Internal Revenue Code of 1986, as amended). It is uncertain if and to what extent various states will

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conform to the federal tax laws. In addition, at the state level, there may be periods during which the use of net operating losses is suspended or otherwise limited, which could accelerate or permanently increase state taxes owed.

As of December 31, 2025, we also had U.S. federal and state research and development tax credit carryforwards of $18.8 million and $9.2 million, respectively, which expire at various dates through 2045. These tax credit carryforwards could expire unused and be unavailable to offset our future income tax liabilities.

In addition, under Sections 382 and 383 of the Internal Revenue Code of 1986, as amended, or the Code, and corresponding provisions of state law, if a corporation undergoes an "ownership change," which is generally defined as a greater than 50% change, by value, in its equity ownership over a three-year period, the corporation's ability to use its pre-change net operating loss carryforwards and other pre-change tax attributes to offset its post-change income or taxes may be limited. In 2021, we completed a study of ownership changes from inception through December 31, 2020, which concluded that we experienced ownership changes as defined by Section 382 of the Code. However, there were no net operating loss carryforwards that were limited or expired unused. We have not updated the study to assess whether a change of ownership has occurred following the period covered by the 2021 study. We may have experienced additional ownership changes that have not been identified that could result in the expiration of our net operating loss and tax credit carryforwards before utilization and we may experience subsequent shifts in our stock ownership, some of which are outside our control. As a result, if we earn net taxable income and determine that an ownership change has occurred and our ability to use our historical net operating loss and tax credit carryforwards is materially limited, that will harm our future operating results by effectively increasing our future tax obligations.

***Changes in tax laws could adversely affect our business and financial condition.***

The rules dealing with U.S. federal, state and local income taxation are constantly under review by persons involved in the legislative process and by the Internal Revenue Service, or the IRS, and the U.S. Treasury Department. For example, the One Big Beautiful Bill Act, or the OBBBA, was signed into law on July 4, 2025 and made significant changes to U.S. federal tax law. Changes to tax laws (which changes may have retroactive application) could adversely affect us or holders of our common stock. In recent years, many changes to tax laws have been made and changes are likely to continue to occur in the future. Future changes in tax laws could have a material adverse effect on our business, cash flow, financial condition or results of operations. We urge investors to consult with their legal and tax advisers regarding the implications of potential changes in tax laws on an investment in our common stock.

***If serious adverse events, undesirable side effects or unexpected characteristics or results are identified during the development of any product candidates we may develop, we may need to modify, abandon, or limit our further clinical development of those product candidates.***

While we have commenced clinical trials of several product candidates and our partner Betta Pharma has commenced a clinical trial of another of our product candidates, all of our other product candidates are still in the discovery stage at this time, which means that we have not yet evaluated any of our other product candidates in human clinical trials. It is impossible to predict when or if any product candidates we may develop will prove safe in humans. Any of the product candidates developed through our TORPEDO platform may cause undesirable side effects, which could arise at any time during preclinical or clinical development.

A potential risk with product candidates developed through our TORPEDO platform, or in any protein degradation product candidate, is that healthy proteins or proteins not targeted for degradation may be degraded or that the degradation of the targeted protein in and of itself could cause adverse events, undesirable side effects or unexpected characteristics or results. There is also the potential risk of delayed adverse events following treatment using product candidates developed through our TORPEDO platform.

If any product candidates we develop are associated with serious adverse events or undesirable side effects or have other characteristics or results that are unexpected, we may choose or need to abandon their development, modify our development plans as to dose level and/or dose schedule or otherwise, or limit development to certain uses or subpopulations in which the adverse events, undesirable side effects or other characteristics are less prevalent, less severe or more acceptable from a risk-benefit perspective. The occurrence of any of these types of events would have an adverse effect on our business, financial condition, results of operations, and prospects. Many product candidates that initially showed promise in early-stage testing for treating cancer or other diseases have later been found to cause side effects that prevented further clinical development of the product candidates or limited their competitiveness in the market. For example, single agent BRAF inhibitors can cause a secondary malignancy called keratocanthoma, which is a skin cancer caused by paradoxical activation of BRAF upon inhibitor binding.

***If we experience delays or difficulties in the enrollment of patients in our clinical trials, our timelines for submitting applications for and receiving necessary marketing approvals could be delayed, or we may be prevented from obtaining marketing approvals altogether.***

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We may not be able to initiate clinical trials for our product candidates if we are unable to locate and enroll a sufficient number of eligible patients to participate in these trials, as required by the FDA or similar regulatory authorities outside of the United States. While we believe that we will be able to enroll a sufficient number of patients into each of our ongoing and planned clinical trials, we cannot predict with certainty how difficult it will be to enroll patients for trials, some of which are in rare indications. Our ability to identify and enroll eligible patients for clinical trials of our product candidates may turn out to be limited or we may be slower in enrolling these trials than we anticipate. In addition, some of our competitors have ongoing clinical trials for product candidates that treat the same indications as our product candidates and, as a result, patients who would be eligible for our clinical trials may instead elect to enroll in clinical trials of our competitors' product candidates. Patient enrollment in clinical trials may also be affected by other factors including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the severity of the disease under investigation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the eligibility criteria for the trial in question;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the perceived risks and benefits of the product candidates offered in the clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the efforts to facilitate timely enrollment in clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the patient referral practices of physicians;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the availability of suitable and sufficient staffing at clinical trial sites;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the burden on patients due to the scope and invasiveness of required procedures under clinical trial protocols, some of which may be inconvenient and/or uncomfortable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the ability to monitor patients adequately during and after treatment;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the proximity and availability of clinical trial sites for prospective patients; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the impact of any global health epidemics, which may affect the conduct of a clinical trial, including by slowing potential enrollment or reducing the number of eligible patients for clinical trials or by interfering with patients' ability to return to the clinical trial site for required monitoring, procedures, or follow-up.

Our inability to enroll a sufficient number of patients for our clinical trials, or our inability to do so on a timely basis, would result in significant delays and could require us to abandon one or more clinical trials altogether. Enrollment delays in our clinical trials may also result in increased development costs for our product candidates, which would cause the value of our company to decline and limit our ability to obtain additional financing.

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

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

***We or our partners may develop our product candidates in combination with other drugs. If the FDA or similar regulatory authorities outside of the United States do not approve these other drugs, revoke their approval of these other drugs or if safety, efficacy, manufacturing or supply issues arise with the drugs we choose to evaluate in combination with our product candidates, we may be unable to obtain approval of or market our product candidates.***

Based on the study design for a number of our product candidates, once a recommended dose is identified from the dose escalation portion of our first-in-human Phase 1/2 clinical trial, we often plan to conduct a portion of that clinical trial in combination with one or more other medicines. We did not develop or obtain marketing approval for, nor do we manufacture or sell, any of the currently approved drugs that we may study in combination with our product candidates. If the FDA or similar regulatory authorities outside of the United States revoke their approval of the drug or drugs that we intend to deliver in combination with our product candidates, we will not be able to market our product candidates in combination with those revoked drugs.

If safety or efficacy issues arise with any of these drugs, we could experience significant regulatory delays and the FDA or similar regulatory authorities outside of the United States may require us to redesign or terminate certain of our clinical

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trials. If the drugs we use are replaced as the standard of care for the indications we choose for our product candidates, the FDA or similar regulatory authorities outside of the United States may require us to conduct additional clinical trials. In addition, if manufacturing or other issues result in a shortage of supply of the drugs with which we determine to combine with our product candidates, we may not be able to complete clinical development of our product candidates on our current timeline or at all.

Even if our product candidates were to receive marketing approval or be commercialized for use in combination with other existing drugs, we would continue to be subject to the risks that the FDA or similar regulatory authorities outside of the United States could revoke approval of the drugs used in combination with our product candidates or that safety, efficacy, manufacturing or supply issues could arise with these existing drugs.

Combination therapies are commonly used for the treatment of cancer and we would be subject to similar risks if we were to elect to develop any of our other product candidates for use in combination with other drugs or for indications other than cancer. This could result in our own products being removed from the market or being less successful commercially.

***We may not be successful in our efforts to identify or discover additional potential product candidates.***

While our current clinical-stage programs are focused on oncology targets, a key element of our strategy is to apply our TORPEDO platform to develop product candidates that address a broad array of targets and new therapeutic areas, such as inflammation, neuroinflammation and neurodegenerative diseases. The therapeutic discovery activities that we are conducting may not be successful in identifying product candidates that are useful in treating cancer or other diseases. Our research programs may initially show promise in identifying potential product candidates, yet fail to yield product candidates for clinical development for a number of reasons, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• potential product candidates may, on further study, be shown to have harmful side effects or other characteristics that indicate that they are unlikely to be drugs that will receive marketing approval or achieve market acceptance;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• potential product candidates may not be effective in treating their targeted diseases; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the market size for the target indications of a potential product candidate may diminish over time due to improvements in the standard of care to the point that further development is not warranted.

Research programs to identify new product candidates require substantial technical, financial and human resources. We may choose to focus our efforts and resources on a potential product candidate that ultimately proves to be unsuccessful. If we are unable to identify suitable product candidates for preclinical and clinical development, we will not be able to obtain revenues from sale of products in future periods, which likely would result in significant harm to our financial position and adversely impact our stock price.

***If we do not achieve our projected development goals in the timeframes we announce and expect, the commercialization of our products may be delayed and, as a result, our stock price may decline.***

From time to time, we may estimate the timing of the anticipated accomplishment of various scientific, clinical, regulatory, and other product development goals, which we sometimes refer to as milestones. These milestones may include the commencement or completion of preclinical studies and clinical trials and the submission of regulatory filings. From time to time, we may publicly announce the expected timing of some of these milestones. Each of these milestones is and will be based on numerous assumptions. The actual timing of these milestones can vary dramatically compared to our estimates, in some cases for reasons beyond our control. If we do not meet these milestones as publicly announced, or at all, our revenue may be lower than expected or the commercialization of our products may be delayed or never achieved and, as a result, our stock price may decline.

**Risks related to dependence on third parties** 

***We expect to rely on third parties to conduct our current and future clinical trials and those third parties may not perform satisfactorily, including by failing to meet deadlines for the completion of our clinical trials or failing to comply with contractual obligations, regulatory requirements, or our clinical protocols.***

We currently rely on and plan to continue to rely on CROs to conduct our clinical trials of our product candidates. Additionally, we must contract with third-party research sites for the conduct of our clinical trials. Just as we rely on Betta Pharma to develop CFT8919 in Greater China in an efficient and effective manner, we may also similarly rely on other third party collaboration partners in the future to develop one or more of our product candidates in various territories on certain timelines. Our agreements with these CROs, sites, and other third parties might terminate for a variety of reasons, including a failure to perform by the third parties. If we were ever to need to enter into alternative arrangements or if we were to need to change a CRO for an ongoing clinical trial, which we have done in the past, we might experience delays in our clinical development activities.

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Our reliance on CROs for research and development activities will reduce our control over these activities but will not relieve us of our responsibilities for how these activities are performed. For example, we will remain responsible for ensuring that each of our clinical trials is conducted in accordance with the general investigational plan and protocols in the applicable IND. Moreover, the FDA requires compliance with standards, commonly referred to as GCPs, for conducting, recording and reporting the results of clinical trials to assure that data and reported results are credible and accurate and that the rights, safety and confidentiality of trial participants are protected. GCP compliance extends not only to sponsors of clinical research but also to third parties including CROs and sites involved in the conduct of clinical research. Similarly, other regulators throughout the world require compliance with similar standards that are also applicable to clinical trial sponsors and other third parties like CROs and clinical trial sites.

Further, these CROs or sites may have relationships with other entities, some of which may be our peers or competitors. If the CROs or sites with whom we work do not successfully carry out their contractual duties, meet expected deadlines or conduct our clinical trials in accordance with regulatory requirements or our stated protocols, we may not be able to obtain, or may be delayed in obtaining, marketing approvals for our product candidates and may not be able to, or may be delayed in our efforts to, successfully commercialize our product candidates. Our failure or the failure of these third parties to comply with applicable regulatory requirements or our stated protocols could also subject us to enforcement action. Moreover, our business may be implicated if any of these third parties violates federal or state fraud and abuse or false claims laws and regulations or healthcare privacy and security laws.

We also currently rely on certain foreign or foreign-owned third-party vendors to manufacture certain materials used in clinical trials of our product candidates or to provide services in connection with our clinical trials or discovery activities. Our engagement with these foreign and foreign-owned vendors may be subject to new U.S. legislation or investigations, sanctions, tariffs, trade restrictions and other foreign regulatory requirements, which could cause us to need to identify alternate service providers, increase the cost or reduce the supply of materials available to us, delay the procurement or supply of these materials, delay or impact clinical trials or commercial launch of any resulting product, or have an adverse effect on our ability to secure significant commitments from governments to purchase our potential therapies, any of which could adversely affect our financial condition and business prospects.

***Manufacturing pharmaceutical products is complex and subject to product delays or loss for a variety of reasons. We contract with third parties for the manufacture of our product candidates for preclinical testing and clinical trials and expect to continue to do so for commercialization. This reliance on third parties increases the risk that we will not have sufficient quantities of our product candidates or products or that we will not have the quantities we desire or require at an acceptable cost or quality or at the right time, which could delay, prevent, or impair our development or commercialization efforts.***

We do not own or operate, and currently have no plans to establish, any manufacturing facilities. We rely on and expect to continue to rely on contract manufacturing organizations, or CMOs, for both drug substance and finished drug product. This reliance on third parties may increase the risk that we will not have sufficient quantities of our product candidates or products or that we will not have the quantities we desire or require at an acceptable cost or quality, which could delay, prevent, or impair our development or commercialization efforts, including where a pre-approval inspection or an inspection of manufacturing sites is required and FDA is unable to complete those required inspections during the review period for any reason.

We may be unable to establish agreements with CMOs or to do so on acceptable terms. Even if we are able to establish agreements with CMOs, reliance on third-party manufacturers entails additional risks, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• reliance on the third party for regulatory, compliance, quality assurance, and manufacturing success;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the possible breach of the manufacturing agreement by the third-party CMO;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the possible risk that the CMO will cease offering the services we require or shut down operations altogether, either temporarily or permanently, due to a regulatory concern, financial insolvency, non-compliance with applicable law or another reason;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the possible misappropriation of our proprietary information, including our trade secrets and know-how; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the possible termination or non-renewal of the agreement by the third party at a time that is costly or inconvenient for us or the inability of the CMO to provide us with a manufacturing slot when we need it.

We have only limited supply agreements in place with respect to our product candidates and these existing arrangements do not extend to commercial supply. We acquire many key materials on a purchase order basis. As a result, we do not have long-term committed arrangements with respect to our product candidates and other materials. If we anticipate receiving or receive marketing approval for any of our product candidates, we will need to establish or have established an agreement for commercial manufacture with one or more third parties. In addition, new U.S. legislation or investigations, as well as

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possible sanctions, tariffs, trade restrictions and/or other foreign regulatory requirements, could serve to limit the third parties we could engage, increase the cost or reduce the supply of materials available to us, or otherwise adversely affect our business prospects, financial condition and results of operations.

Third-party manufacturers may not be able to comply with current good manufacturing practices, or cGMP, regulations or similar regulatory requirements outside of the United States. Some of our molecules are highly potent and, in the absence of additional safety data, they receive a high occupational exposure band, or OEB. These assigned OEBs dictate the containment and other precautions that must be taken as part of the manufacture of our product candidates and, for molecules with high OEB designations, serve to limit the number of CMOs who are qualified to manufacture our molecules. Our failure, or the failure of our CMOs, to comply with applicable regulations, including the ability of our CMOs to work with our highly potent materials and the safety protocols in connection therewith, could result in sanctions being imposed on us, including clinical holds, fines, injunctions, civil penalties, delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of product candidates or products, operating restrictions and criminal prosecutions, any of which could significantly and adversely affect supplies of our products.

Our product candidates and any products that we may develop may compete with other product candidates and products for access to manufacturing facilities. As a result, we may not obtain access to these facilities on a priority basis or at all. There are a limited number of manufacturers that operate under cGMP regulations and that might be capable of manufacturing for us, particularly, in some cases, given the potency or OEB of our compounds.

Any performance failure or delay in performance on the part of our existing or future manufacturers could delay clinical development or marketing authorization. While our CMOs have experienced performance issues in the past that have not ultimately delayed our clinical development efforts, in the future, we could experience a manufacturing issue that would have a material impact on development of our product candidates and the occurrence of an event of this nature would largely be outside of our control. We do not currently have arrangements in place for redundant supply or a second source for drug substance or drug product. If our current CMOs cannot perform as agreed, we may be required to replace them. While we have identified several potential alternative vendors who could manufacture some or all of our product candidates, switching vendors could result in significant additional costs and delays to our operations as we select and qualify a replacement manufacturer, we may be constrained in the vendors we can select, particularly for compounds that have high OEB designations, or we may not be able to reach agreement with an alternative manufacturer on acceptable terms. Similarly, our clinical supply partners, such as Pfizer in the case of elranatamab, may rely on a variety of third parties in connection with the manufacturing of their products. Any performance failure or delay on the part of Pfizer or any of these third parties that delays, halts, or otherwise materially impacts the availability of supply of these combination therapies could have a material impact on development of our product candidates.

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

Additionally, we currently rely on single source suppliers for a portion of our supply chain for our preclinical and clinical trial supplies. If our current or future suppliers, whether for raw materials, drug substance, or drug product, are unable to supply us with sufficient materials for our preclinical studies and clinical trials, we may experience delays in our development efforts as we locate and qualify new suppliers or manufacturers.

The third-party manufacturers on whom we rely may incorporate their own proprietary processes into our product candidate manufacturing processes. We have limited control and oversight of a third party's proprietary manufacturing processes. If a third-party manufacturer were to modify its processes, those modifications could negatively impact our manufacturing, including product loss or failure that requires additional manufacturing runs or a change in manufacturer, both of which could significantly increase the cost of and significantly delay the manufacture of our product candidates.

As our product candidates progress through preclinical studies and clinical trials towards approval and commercialization, we expect that various aspects of the product development and manufacturing process will evolve in an effort to optimize processes and results. Some of those product and manufacturing process changes may involve the use of third-party proprietary technology, which could then cause us to need to obtain a license from third parties. In addition, these types of changes may require that we make amendments to our regulatory applications, which could further delay the timeframes under which modified manufacturing processes can be used for any of our product candidates.

In addition, as we advance our product candidates into later stage clinical trials and plan for the potential commercialization of our product candidates, we may determine that it is necessary or appropriate to bring on additional suppliers of drug product and/or drug substance, which could result in changes to the manufacturing processes for our product candidates and may require us to provide additional information to regulatory authorities. If we were to bring on

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additional CMOs for our product candidates, we may also be required to demonstrate analytical comparability and/or conduct additional bridging studies or trials, all of which would require additional time and expense.

***We have existing collaborations and may enter into future collaborations, strategic alliances, or licensing arrangements with third parties for the research, development and commercialization of certain product candidates. If any of these existing or future arrangements are not successful, or if we are unable to enter into such arrangements on favorable terms or at all, we may not be able to capitalize on the market potential of those product candidates. In addition, these collaborations or other arrangements could impact our intellectual property rights and business operations.***

We have the following ongoing collaborations and license arrangements involving our research and development programs:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the Roche Agreement, with collaboration activities ongoing as to two targets,

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the Merck KGaA Agreement for the development and commercialization of two targeted protein degraders against critical oncogenic proteins that we had previously progressed within our internal discovery pipeline,

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the Betta Pharma License Agreement under which Betta Pharma received an exclusive license for the development, manufacturing and commercialization of CFT8919 in Greater China.

We may enter into similar collaboration, strategic alliances, joint ventures or licensing arrangements in the future with third parties that we believe will complement or augment our research, development, and commercialization efforts. However, it is possible that we will not be able to enter into such arrangements on favorable terms or at all, such that we may not be able to capitalize on the market potential of our current or future product candidates.

Under our current collaboration agreements, we are generally responsible for developing drug candidates leveraging our TORPEDO platform based on partner-selected targets. These agreements, as well as our agreements with prior research collaboration partners, provide that our current and past collaboration partners have exclusive rights to develop degraders for their selected and reserved targets. As a result, we are not permitted to pursue a target of potential interest – either alone or with another partner – while that target is bound by these restrictions.

Further, if our collaborations do not result in the successful development and commercialization of products or if one of our collaborators terminates its agreement with us or elects not to pursue a program within a collaboration, we may not receive any future research funding or milestone or royalty payments under that collaboration or in respect of that terminated program. In that event, we may choose to abandon the program or to advance it independently, which would require us to commit significant additional resources. Collaborators may terminate agreements (i) for convenience (generally upon 60 to 270 days' notice), (ii) with respect to specific targets, or (iii) for uncured material breaches. Such termination could delay our development programs, make it more difficult to attract new collaborators or adversely affect our reputation in the business and financial communities. All of the risks relating to product development, marketing approval and commercialization described in this report apply to the activities of our collaborators.

Our collaborators may fail to adequately obtain, maintain, enforce, or defend intellectual property arising from licensed programs or may use our proprietary information in a way that could jeopardize or invalidate our proprietary information or expose us to potential litigation. Generally, our collaborators have the first right to enforce and defend certain intellectual property rights under the applicable collaboration arrangement. We may have the right to assume the enforcement and defense of these intellectual property rights if our collaborator does not, but our ability to do so may be compromised by their actions. If any licensed program were to revert to us, our ability to protect any associated intellectual property or other proprietary rights may be impacted by the intellectual property filings made or other steps taken by our collaborator prior to the reversion. Further, our collaborators may own or co-own intellectual property covering our products that result from our collaboration and, in such cases, we would not have the exclusive right to commercialize the collaboration intellectual property.

Further, we face significant competition in seeking appropriate strategic partners and the negotiation process for these transactions is time-consuming, complex, and expensive. Additionally, our existing partners may decide to acquire or partner with other companies developing targeted protein degraders or directed at the targets or indications to which our product candidates are directed, which may have an adverse impact on our business prospects, financial condition and results of operations.

If we do enter into additional collaboration agreements and strategic partnerships or further license our product candidates, we may not be able to realize the benefit of those transactions if we are unable to successfully integrate them with our existing operations.

**Risks related to the commercialization of our product candidates** 

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***Even if any of our product candidates 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.***

If any of our product candidates receives marketing approval, it may nonetheless fail to gain sufficient market acceptance by physicians, patients, third-party payors, and others in the medical community. For example, current cancer treatments, such as chemotherapy and radiation therapy, are well-established in the medical community and doctors may continue to rely on these treatments. If our product candidates do not achieve an adequate level of acceptance, we may not generate significant revenue from product sales and we may not become profitable. The degree of market acceptance of our product candidates, if approved for commercial sale, will depend on a number of factors, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the efficacy and potential advantages compared to alternative treatments;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the prevalence and severity of any side effects, in particular compared to alternative treatments;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to offer our products for sale at competitive prices and the ability of governmental authorities to require that we negotiate the pricing of our products, as well as the timing of these mandatory negotiations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the convenience and ease of administration compared to alternative treatments;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the willingness of the target patient population to try new therapies and of physicians treating these patients to prescribe these therapies;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the strength of marketing, sales, and distribution support;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the availability of third-party insurance coverage and adequate reimbursement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the timing of any marketing approval in relation to other product approvals;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• support from patient advocacy groups; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any restrictions on the use of our products together with other medications.

***As a company, we currently have no marketing and sales organization and no experience in marketing products. If we are unable to establish marketing and sales capabilities or enter into agreements with third parties to market and sell our product candidates, if approved, we may not be able to generate product revenue.***

As a company, we currently have no sales, marketing, or distribution capabilities and no experience in marketing products. We intend to develop an in-house marketing organization and sales force, which will require significant capital expenditures, management resources, and time. We will have to compete with other pharmaceutical and biotechnology companies to recruit, hire, train, and retain marketing and sales personnel.

If we are unable or decide not to establish internal sales, marketing, and distribution capabilities, we will pursue arrangements with third-party sales, marketing, and distribution collaborators regarding the sales and marketing of our products, if approved. However, there can be no assurance that we will be able to establish or maintain these types of arrangements on favorable terms or if at all, or if we are able to do so, that these third-party arrangements will provide effective sales forces or marketing and distribution capabilities. Any revenue we receive will depend upon the efforts of these third parties, which may not be successful. We may have little or no control over the marketing and sales efforts of these third parties and our revenue from product sales may be lower than if we had commercialized our product candidates ourselves. We also face competition in our search for third parties to assist us with the sales and marketing efforts of our product candidates.

There can be no assurance that we will be able to develop in-house sales and distribution capabilities or establish or maintain relationships with third-party collaborators to commercialize any product in the United States or overseas.

***The market opportunities for our product candidates may be relatively small as we expect that they will initially be approved only for those patients who are ineligible for other approved treatments or have failed prior treatments. In addition, our estimates of the prevalence of our target patient populations may be inaccurate.***

Our current product candidates target cancer, but cancer therapies are sometimes characterized as first-line, second-line, third-line, or subsequent line and the FDA often approves new therapies initially only for a particular line of use. When cancer is detected early enough, first-line therapy is sometimes adequate to cure the cancer or prolong life without a cure. Whenever first-line therapy – usually chemotherapy, antibody drugs, tumor-targeted small molecules, immunotherapy, hormone therapy, radiation therapy, surgery, other targeted therapies, or a combination of these therapies – proves unsuccessful, second-line therapy may be administered. Second-line therapies often consist of more chemotherapy, radiation, antibody drugs, tumor-targeted small molecules, or a combination of these. Third-line therapies can include chemotherapy, antibody drugs and small molecule tumor-targeted therapies, more invasive forms of surgery, and new

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technologies. We expect initially to seek approval of our product candidates in most instances as a later-line therapy, for use in patients with relapsed or refractory cancer. Subsequently, for those product candidates that prove to be sufficiently safe and beneficial, if any, we would expect to seek approval as a second-line therapy and potentially as a first-line therapy, but there is no guarantee that any of our product candidates, even if approved as a second- or third- or subsequent line of therapy, would subsequently be approved for an earlier line of therapy. Further, it is possible that, prior to getting any approvals for our product candidates in earlier lines of treatment, we might have to conduct additional clinical trials.

Our projections of both the number of people who have the cancers we are targeting, who may have their tumors genetically sequenced, as well as the subset of people with these cancers in a position to receive a particular line of therapy and who have the potential to benefit from treatment with our product candidates, are based on our reasonable beliefs and estimates. These estimates have been derived from a variety of sources, including scientific literature, surveys of clinics, patient foundations, or market research and may prove to be incorrect or out of date. Further, new therapies may change the estimated incidence or prevalence of the cancers that we are targeting. Consequently, even if our product candidates are approved for a second- or third-line of therapy, the number of patients that may be eligible for treatment with our product candidates may turn out to be much lower than expected. In addition, we have not yet conducted market research to determine how treating physicians would expect to prescribe a product that is approved for multiple tumor types if there are different lines of approved therapies for each of those tumor types.

***Even if we or, in the case of CFT8919, Betta Pharma, receive marketing approval of any of our product candidates, our products may become subject to unfavorable pricing regulations, third-party reimbursement practices, or healthcare reform initiatives, any of which would impact our business.***

The regulations that govern marketing approvals, pricing, coverage, and reimbursement for new drug products vary widely from country to country. Current and future legislation may significantly change the approval requirements in ways that could involve additional costs and cause delays in obtaining approvals. 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 product licensing approval is granted. To obtain reimbursement or pricing approval in some countries, we may be required to conduct a clinical trial that compares the cost-effectiveness of our product candidate to other available therapies. In some foreign markets, prescription pharmaceutical pricing remains subject to continuing governmental control even after initial approval is granted. As a result, we or, in the case of CFT8919, Betta Pharma, might obtain marketing approval for a product candidate in a particular country, but then be subject to price regulations that delay the commercial launch of the product, possibly for lengthy time periods, which would negatively impact the revenues, if any, we are able to generate from the sale of the product in that country. Adverse pricing limitations may, therefore, hinder our ability to recoup our investment in one or more of our product candidates, even if our product candidates obtain marketing approval. See the section entitled "*Business — Coverage and Reimbursement*" and "*Business — Healthcare Reform*" in this Annual Report on Form 10-K.

Our and, in the case of CFT8919, Betta Pharma's ability to commercialize any product candidates successfully also will depend in part on the extent to which coverage and adequate reimbursement for these products and related treatments will be available from government healthcare programs, private health insurers and other organizations. Government authorities and third-party payors, such as private health insurers and health maintenance organizations, decide which medications they will pay for and establish reimbursement levels.

A primary trend in the U.S. healthcare industry and elsewhere is cost containment. Multiple executive actions in the first half of 2025 signal the federal government's increasing focus on lowering prescription drug prices, adding to the uncertainty surrounding future drug pricing and reimbursement frameworks. For example:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• In May 2025, President Trump signed the executive order titled "Delivering Most-Favored-Nation Prescription Drug Pricing," which directs the Secretary of Health and Human Services, or HHS, to identify and communicate most-favored-nation price targets for prescription drugs and to propose a rulemaking plan to impose such pricing if "significant progress" is not made. The order also directs the federal government to explore regulatory pathways that would facilitate direct-to-patient sales for manufacturers that meet these price targets. Additionally, it signals potential further action against manufacturers that fail to offer most-favored-nation pricing, including evaluating whether to modify or rescind marketing approvals or allow individual drug importation waivers. Notably, a similar rule promulgated during President Trump's first term would have tied Medicare Part B reimbursement rates to the lowest price available for a drug in certain foreign countries. That rule was subject to litigation and ultimately rescinded by the Biden Administration in August 2021. In a related development, FDA Commissioner Makary announced in July 2025 that the agency is considering a new fast-track priority review voucher program for manufacturers that commit to pricing drugs in line with those in economically comparable countries. The implementation timeline and commercial implications of these proposals remain uncertain.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• In April 2025, President Trump issued the executive order "Lowering Drug Prices by Once Again Putting Americans First," which contains a broad set of directives aimed at reducing drug costs. Among other actions, the

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order directs HHS to revise guidance under the Inflation Reduction Act, or the IRA, to eliminate the so-called "pill penalty," which currently subjects small molecule drugs to Medicare price negotiation four years earlier than biologics. The order also calls for a comprehensive evaluation of the role played by pharmacy benefit managers, or PBMs, in drug pricing and market access.

Further, the Medicare Drug Price Negotiation Program, administered by CMS as part of the Inflation Reduction Act of 2022, commonly referred to as the IRA, may apply to our products if they are selected for negotiation, which could materially reduce the amount of revenue we can generate from our products if they are approved. Prior to the enactment of the OBBBA, orphan drugs were exempt from Medicare price negotiation under the IRA only if they had received a single orphan designation and were approved solely for the corresponding rare disease or condition. The OBBBA amended this exemption to apply more broadly to provide that any orphan-designated drug is exempt from price negotiation, regardless of the number of orphan designations it has received, provided the drug's approved indications are exclusively for those rare diseases. The OBBBA also included significant reforms to Medicaid, including an estimated $1 trillion in reduced federal Medicaid spending from 2025 through 2034, the imposition of work requirements for certain adult enrollees, more frequent eligibility redeterminations, and increased cost-sharing for beneficiaries. These changes are expected to reduce overall Medicaid enrollment and access to care. Although the effect on our future product candidates or business is unknown, any decrease in the number of insured patients or reimbursement levels for our products could adversely affect our potential for revenue and our commercial prospects.

Government authorities and third-party payors have attempted to control costs by limiting coverage and the amount of reimbursement for particular medications. Increasingly, government authorities and third-party payors are requiring that drug companies provide them with predetermined discounts from list prices and are challenging the prices charged for medical products. Coverage and reimbursement may not be available for any product that we commercialize and, even if these are available, the level of reimbursement may not be satisfactory. Reimbursement may affect the demand for, or the price of, any product candidate for which we obtain marketing approval. Obtaining and maintaining coverage and adequate reimbursement for our products may be difficult. We may be required to conduct expensive pharmacoeconomic studies to justify coverage and reimbursement or the level of reimbursement relative to other therapies. In addition, in light of the requirements of the IRA, we may be required to negotiate pricing for our product candidates, if approved, with Medicare, with those negotiated prices going into effect nine years after product approval. If coverage and adequate reimbursement are not available or reimbursement is available only to limited levels, we may not be able to successfully commercialize any product candidate for which we obtain marketing approval.

There may be significant delays in obtaining coverage and reimbursement for newly approved drugs. In addition, coverage may be more limited than the purposes for which the drug is approved by the FDA or similar regulatory authorities outside of the United States. Moreover, eligibility for coverage and reimbursement does not imply that a drug will be paid for in all cases or at a rate that covers our costs, including research, development, intellectual property, manufacture, sale and distribution expenses. Interim reimbursement levels for new drugs, if applicable, may also not be sufficient to cover our costs and may not be made permanent. Reimbursement rates may vary according to the use of the drug and the clinical setting in which it is used, may be based on reimbursement levels already set for lower cost drugs and may be incorporated into existing payments for other services. Net prices for drugs may be reduced by mandatory discounts or rebates required by government healthcare programs or private payors and by any future relaxation of laws that presently restrict imports of drugs from countries where they may be sold at lower prices than in the United States.

In the United States, no uniform policy for coverage and reimbursement for products exists among third-party payors. Therefore, coverage and reimbursement for our products can differ significantly from payor to payor. The process for determining whether a payor will provide coverage for a product may be separate from the process for setting the reimbursement rate that the payor will pay for the product. 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. Third-party payors may also limit coverage to specific products on an approved list, or formulary, which might not include all of the FDA-approved products for a particular indication. Third-party payors often rely upon Medicare coverage policy and payment limitations in setting their own reimbursement policies. Our inability to promptly obtain coverage and adequate reimbursement rates from both government-funded and private payors for any approved products that we develop could have an adverse effect on our operating results, our ability to raise capital needed to commercialize products and our overall financial condition.

***Product liability lawsuits against us could cause us to incur substantial liabilities and to limit commercialization of any products that we may develop.***

We face an inherent risk of product liability exposure related to the testing of our product candidates in human clinical trials and will face an even greater risk if or when we commercially sell any products that we may develop. If we cannot successfully defend ourselves against claims that our product candidates or products caused injuries, we will incur substantial liabilities. Regardless of merit or eventual outcome, liability claims may result in:

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• decreased demand for any product candidates or products that we may develop;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• termination of clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• withdrawal of marketing approval, product recall, restriction on the approval or a "black box" warning or contraindication for an approved drug;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• withdrawal of clinical trial participants;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• significant costs to defend the related litigation and/or increased product liability insurance costs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• substantial monetary awards to trial participants or patients;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• loss of revenue;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• injury to our reputation and significant negative media attention;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• reduced resources of our management to pursue our business strategy; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the inability to commercialize any products that we may develop.

We currently maintain product liability insurance coverage to support our clinical development activities. We may need to purchase additional product liability insurance coverage as we expand our clinical trials and if and when we commence commercialization of our product candidates. Insurance coverage is increasingly expensive. We may not be able to maintain insurance coverage at a reasonable cost or in an amount adequate to satisfy any liability that may arise.

**Risks related to our intellectual property** 

***If we are unable to obtain and maintain patent protection for our technology, product candidates, and products or if the scope of the patent protection obtained is not sufficiently broad or enforceable, our competitors could develop and commercialize technology, product candidates, and products similar or identical to ours, our ability to successfully commercialize our technology, product candidates, and products may be impaired or we may not be able to compete effectively in our market.***

We rely on a combination of patents, trade secrets and confidentiality and assignment agreements to protect our intellectual property and prevent others from exploiting our platform technologies, our pipeline drug product candidates, any future drug product candidates we may develop, and their manufacture and use.

Our commercial success depends in part on our ability to obtain, maintain and enforce patents and other proprietary protection in the United States and other countries with respect to our proprietary technology, product candidates and products. We seek to protect our proprietary position by filing patent applications in the United States and abroad related to our novel technologies and product candidates; however, any disclosure to, or misappropriation by, third parties of our confidential proprietary information could enable competitors to quickly duplicate or surpass our technological achievements, thereby eroding our competitive position.

The patent prosecution process is expensive and time-consuming and we may not be able to file, prosecute and maintain all necessary or desirable patent applications at a reasonable cost or in a timely manner. We may fail to identify patentable aspects of our research and development output before it is too late to obtain patent protection. In addition, in some circumstances, we do not have the right to control the preparation, filing and prosecution of patent applications, or to maintain the patents and patent applications, covering technology that we license from third parties or that we license to our collaborators. Therefore, these patents and applications may not be prosecuted and enforced in a manner consistent with the best interests of our business.

The patent position of the biopharmaceutical industry generally is highly uncertain, involves complex legal and factual questions and has been the subject of extensive litigation. Publications in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and other jurisdictions are typically not published until 18 months after filing, or in some cases not at all. As a result, we cannot know with certainty whether we were the first to make the inventions claimed in our owned, co-owned or licensed patents or pending patent applications, or whether we were the first inventors to file for patent protection of those inventions. Accordingly, the issuance, scope, validity, enforceability and commercial value of our patent rights, or those of our collaborators, are highly uncertain. Our pending and future patent applications may not result in patents being issued that protect our technology, product candidates or products, in whole or in part, or that effectively prevent others from commercializing competitive technologies, product candidates and products. Changes in the patent laws or other laws or their interpretation in the United States and other countries may diminish the value of our patents and patent applications, narrow the scope of our patent protection, or cause us to be required to pay royalties to third parties. If the breadth or strength of protection provided by our patents and patent applications is

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threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future product candidates.

Our owned, co-owned, and licensed patent estate consists of both patents and patent applications, which are at various stages of prosecution. Even if such patent applications issue as patents, the patents may not issue in a form that provides meaningful protection, prevents competitors from competing with us, or otherwise provides any competitive advantage. Competitors may be able to circumvent our patents by developing similar or alternative technologies, product candidates, or products in a non-infringing manner.

The issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our owned, co-owned and licensed patents, as well as patents obtained by our collaborators, may be challenged in the courts or patent offices in the United States and abroad. Such challenges may result in loss of exclusivity or freedom to operate, or in patent claims being narrowed, invalidated or held unenforceable, in whole or in part, which could limit our ability to stop others from using or commercializing similar or identical technology, product candidates, or products or limit the duration of the patent protection. Given the time required for the development, testing, and regulatory review of new product candidates, patents protecting our drug product candidates or products may expire before or shortly after commercialization. As a result, our patent portfolio, or that of our collaborators, may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours.

***Changes in patent laws or patent jurisprudence could diminish the value of our patents in general or increase third party challenges to our patents, thereby impairing our ability to protect our product candidates.***

Patent reform legislation and evolving jurisprudence could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents. The Leahy-Smith America Invents Act, or the Leahy-Smith Act, made significant changes to U.S. patent law, including changes affecting patent prosecution and patent litigation, and the first-inventor-to-file provisions of the Leahy-Smith Act became effective on March 16, 2013. These changes require us to act promptly during the period from invention to filing of a patent application because a third party could file a patent application before us that is blocking to our patent filings. However, even with the intention to act promptly, circumstances could prevent us from promptly filing or prosecuting patent applications on our inventions. The Leahy-Smith Act also enlarged the scope of disclosures that qualify as prior art, which can impact our ability to obtain patent protection for an invention.

The Leahy-Smith Act also created new procedures under which third parties may challenge issued patents in the United States, including post-grant review, *inter partes* review and derivations proceedings, all of which are adversarial proceedings conducted at the USPTO. For patents with a priority date of March 16, 2013 or later (which is the case for all of our patent filings), third parties may seek post-grant review during the nine-month period after issuance of the patent, and may seek *inter partes* review thereafter. These proceedings apply standards of review that differ from federal court litigation and can result in cancellation of some or all claims in a patent. In addition, changes in USPTO rules and court decisions, including with respect to claim construction and standards applied in these proceedings, may affect the outcomes of challenges. If any of our patents are challenged in a proceeding of this nature, we may not be successful in defending the challenged patent, which could result in our losing rights under the challenged patent in whole or in part and could adversely affect our business, financial condition, results of operations and prospects.

***We may become involved in lawsuits or other proceedings to protect or enforce our patents, the patents of our licensors or other intellectual property, or to defend against challenges, which could be expensive, time-consuming and unsuccessful.***

Competitors may infringe our issued patents, the patents of our licensors or collaborators, or our other intellectual property. To counter infringement or unauthorized use, we may be required to file infringement claims or initiate other proceedings, which can be expensive, time-consuming and unpredictable. Any claims we assert could provoke counterclaims against us alleging that we infringe third-party patents or that our patents are invalid or unenforceable.

In an infringement or enforcement proceeding, a court or other tribunal may decide that a patent of ours or our licensors or collaborators is invalid or unenforceable, in whole or in part, construe the patent's claims narrowly, or refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the technology in question. An adverse result could put one or more of our patents at risk of being invalidated, held unenforceable, or interpreted narrowly. In addition, the U.S. Supreme Court's June 2024 *Loper Bright Enterprises v. Raimondo* decision, which overturned a long-established doctrine of courts giving deference to administrative agencies' interpretations of statutory language and related rules and regulations, has introduced additional uncertainty regarding how courts will interpretation patent statutes and regulations and evaluate USPTO regulations, policies and decisions in future litigation involving patent validity or enforceability.

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Even if resolved in our favor, litigation or other proceedings relating to intellectual property could cause us <u>to incur significant expenses and could distract our technical and management personnel from their normal responsibilities. There may be public announcements of interim developments, and if securities analysts or investors perceive such developments to be negative, it could have a substantial adverse effect on the price of our common stock. These matters could substantially increase our operating losses and reduce the resources available for development and any future sales, marketing or distribution activities. We may not have sufficient financial or other resources to conduct such matters adequately, and some competitors may be able to sustain these costs more effectively than</u> we <u>can.</u>

Even if we successfully assert our patents, a court may not award remedies that sufficiently compensate us for our losses, and we may determine that we must settle these matters on terms that are unfavorable to us. If we are unable to enforce our intellectual property rights adequately against perceived infringers, our business prospects could be materially and adversely affected.

***We may need to license intellectual property from third parties and such licenses may not be available, or may not be available on commercially reasonable terms.***

Third parties may hold intellectual property, including patent rights, that are important or necessary to the development, manufacture or commercialization of our product candidates, products or our collaborators' products. In that case, we or our collaborators may need to obtain a license from the applicable third party, and such a license may not be available, or may not be available on commercially reasonable terms, which could adversely affect on our business and financial condition.

The licensing and acquisition of third-party intellectual property rights is competitive. Companies that are more established or have greater resources than we do may also be pursuing strategies to license or acquire third-party rights that we may consider necessary or attractive in order to commercialize our product candidates, and such companies may have a competitive advantage due to their size, cash resources or clinical development and commercialization capabilities. We may not be able to successfully complete such negotiations or acquire the rights to the intellectual property we seek.

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

Our commercial success depends upon our ability and the ability of our collaborators to develop, manufacture, market, and sell our product candidates and to use our proprietary technologies without infringing the proprietary rights of third parties. There is considerable intellectual property litigation in the biopharmaceutical industry, as well as administrative proceedings for challenging patents in the United States and foreign jurisdictions.

We may become party to or threatened with adversarial proceedings or litigation regarding intellectual property rights with respect to our product candidates and technology, including proceedings before the USPTO (such as derivation, reexamination, post-grant review, *inter partes* review, or interference proceedings) and oppositions, revocations, invalidity actions and other comparable proceedings in foreign jurisdictions. Third parties may assert infringement claims against us based on existing patents or patents that may be granted in the future. Because patent applications can take many years to issue, there may be currently pending patent applications that later issue as patents that our product candidates may infringe, and we may currently unaware of relevant third-party patents or patent application with claims to materials, formulations, methods of manufacture or methods for treatment related to the use or manufacture of our drug candidates. In addition, third parties may obtain patents in the future and claim that our product candidates or use of our technologies infringes upon these patents.

If we are found by a court of competent jurisdiction to infringe a third party's intellectual property rights, we could be required to obtain a license to continue developing and marketing our product candidates, products, or technology. We may not be able to obtain any required license on commercially reasonable terms or at all, and any license we obtain may be non-exclusive. We could be forced, including by court order, to cease commercializing the infringing technology or product and could be found liable for monetary damages, including treble damages and attorneys' fees if we are found to have willfully infringed a patent. A finding of infringement could prevent us from commercializing our product candidates or force us to cease some of our business operations, which could materially harm our business. Claims that we have misappropriated the confidential information or trade secrets of third parties could have similar negative effects.

***A number of other companies, as well as universities and other organizations, file and obtain patents in the same areas as our product candidates, which are TPDs, or our platform technologies, and these patent filings could be asserted against us or our collaborators in the future, which could adversely affect our business and, if successful, could lead to expensive litigation, affect the profitability of any future products and/or prohibit the sale or use of our product candidates or any future products.***

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Our MonoDAC and BiDAC product candidates are small molecule pharmaceuticals, which degrade specific proteins. A number of companies and institutions have patent applications and issued patents in this general area, including AbbVie Inc., Accutar Biotechnology, Inc., Amgen Inc., Amphista Therapeutics, Ltd., Araxes Pharma, LLC, Arvinas, Inc., Astellas Pharma Inc., AstraZeneca PLC, Aurigen Discovery Technologies, Ltd., Bayer AG (and its subsidiary Vividion Therapeutics, Inc.), BeOne Medicines USA, Inc., BioTheryX, Inc., Boehringer Ingelheim International GmbH, Bristol Myers Squibb Company (and its subsidiary Celgene Corporation), Captor Therapeutics Inc., Cullgen Inc., the Dana-Farber Cancer Institute and its Center for Protein Degradation, Dialectic Therapeutics, Inc., Foghorn Therapeutics, Inc., Frontier Medicines Corporation, GlaxoSmithKline PLC, Genentech, Inc., Glubio Therapeutics, Inc., Halda Therapeutics OpCo, Inc., Hinova Pharmaceuticals, Inc., Janssen Biotech, Inc., Kymera Therapeutics, Inc., Monte Rosa Therapeutics, Inc., Novartis International AG, Nurix Therapeutics, Inc., Orum Therapeutics, Inc., Otsuka Pharmaceuticals, Inc., Pfizer Inc., PhoreMost, Ltd., Plexium, Inc., Prelude Therapeutics, Inc., Inc., Roche AG, Salarius Pharmaceuticals Inc., Salarius Pharmaceuticals, Inc., Seed Therapeutics, Inc., Sichuan Haisco Pharmaceutical Co., Ltd., SK Life Science Labs, Inc. (a subsidiary of SK Biopharmaceuticals Co. Ltd)., the University of Michigan School of Medicine, Vertex Pharmaceuticals, Inc., Vicinitas Therapeutics, Inc., and others. If any such third party were to assert that its patents are infringed by any product candidate or potential future product we may develop, or by their manufacture or use, we or our collaborators may be drawn into expensive and time-consuming litigation, which could adversely affect our business prospects, financial condition and results of operations, and distract of members of our management team and employees at large. Further, if litigation of this nature were successful, it could have a material and adverse effect on the profitability of our potential future products or prohibit their sale.

We may not be aware of patent claims that are currently pending or may be filed in the future that could affect our business or product candidates. Patent applications are typically published between six and 18 months from filing and new claims can sometimes be presented in already pending applications without being visible to the public for a period of time. As a result, we cannot provide any assurance that a third party will not present or has not presented a patent claim that covers one or more of our product candidates or their methods of use or manufacture. If that were to occur and as we have done in certain past circumstances, we or our collaborators, as applicable, may need to take steps to invalidate, narrow or avoid the applicable patent or application, including through third-party submissions, oppositions, post-grant review or *inter partes* review proceedings, or litigation or declaratory judgment actions before a court. We or our collaborators may choose not to pursue such steps, or our attempt may not be successful. If we determine that we require a license to a third party's patent or patent application, we may discover that a license is not be available on reasonable terms, or at all, which could prevent us or our collaborators from developing, manufacturing or commercializing affected potential future products or using our proprietary technologies.

***Our product candidates, if approved, will be subject to The Drug Price Competition and Patent Term Restoration Act of 1984, which is also referred to as the Hatch-Waxman Act, in the United States, which can increase the risk of litigation with generic companies trying to sell our potential future products and may cause us to lose patent protection and could adversely affect the exclusivity of any approved products.***

Because our clinical candidates are pharmaceutical molecules that will be reviewed by the FDA's Center for Drug Evaluation and Research, if and when approved, they will be subject in the United States to the patent listing and litigation framework of the Hatch-Waxman Act, as amended to date, which allows a generic company to submit an Abbreviated New Drug Application, or ANDA, to the FDA to obtain approval to sell a generic version of our drug using bioequivalence data only. Under the Hatch-Waxman Act, we will list patents that cover our drug products, if approved, or their respective approved methods of use in the FDA's compendium of "Approved Drug Products with Therapeutic Equivalence Evaluation," sometimes referred to as the Orange Book.

There are detailed rules and requirements regarding which patents may be listed in the Orange Book, and we may be unable to obtain patents that satisfy the requirements. Even if we submit a patent for listing, the FDA may decline to list it, or a generic drug manufacturer, the U.S. Federal Trade Commission or another entity may challenge the listing. If one of our product candidates is approved and a patent covering that product candidate is not listed in the Orange Book, a generic drug manufacturer may be able to seek approval without needing to provide advance notice to us with respect to any unlisted patent in connection with any ANDA filed with the FDA to obtain permission to sell a generic version of that product candidate.

n the United States, the FDA may grant five years of data exclusivity for new chemical entities, or NCEs, which are drugs that contain no active portion that has been approved by the FDA in any other new drug application, or NDA. We expect that all of our potential future products will qualify as NCEs; however, the FDA will not conduct an assessment for NCE status until it is reviewing a marketing application for that drug. A generic company can submit an ANDA to the FDA four years after approval of any of our drug products designated as an NCE. An ANDA filing is considered a technical act of patent infringement and can include certifications that the company will wait until the natural expiration date of our Orange Book listed patents to sell a generic version of our product or that one or more of our listed patents are invalid,

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unenforceable or not infringed. If the generic manufacturer elects the latter, we will have 45 days to bring a patent infringement lawsuit against the generic company. Such litigation is costly, time-consuming, and uncertain, may involve multiple generic challengers, and could result in earlier generic entry, loss of exclusivity, or outcomes that adversely affect the strength, validity or enforceability of our patents. We may also determine that it is necessary to settle these types of lawsuits in a manner that allows the generic company to enter our market prior to the expiration of our patents or otherwise in a manner that a may have similar adverse effects on our patents.

***Pharmaceutical companies are subject to intense review by the U.S. Federal Trade Commission and comparable agencies in other countries regarding how they conduct or settle patent litigation, and we may face similar scrutiny that could result in fines, penalties or loss of rights..***

The U.S. Federal Trade Commission, or FTC, has lawsuits in federal court to challenge ANDA litigation settlements between innovator and generic companies as anti-competitive. The FTC has taken the position that transfers of value in connection with a settlement, whether monetary or not monetary, may constitute an improper "reverse payment" in some circumstances, including agreements relating to the timing of an authorized generic launch.

In 2013, the U.S. Supreme Court's in *FTC v. Actavis, Inc.* held that certain reverse payment settlements can potentially violate antitrust laws and are subject to the standard antitrust rule-of-reason analysis, with the burden of proving that an agreement is unlawful on the FTC. The Supreme Court identified considerations relevant to that analysis, including potential adverse effects on competition, the justification for any payment or transfer of value, the patentee's ability to bring about anti-competitive harm, whether the size of the any payment may serve as a surrogate for the patent's weakness, and whether antitrust scrutiny would unduly discourage settlement.

If we face drug patent litigation, including Hatch-Waxman litigation, the FTC or other regulators may challenge our conduct or any settlement, which could affect if and how we resolve disputes and could result in significant expense, penalties or other adverse outcomes. In addition, settlements could also be challenged by third-party payors such as insurance companies, direct purchasers or others who consider themselves adversely affected by a settlement through follow-on litigation, including class actions, which can be expensive and protracted. If we were to face lawsuits of this nature, we may not be successful in defeating these claims and we may, therefore, be subject to substantial payment obligations, which we may not be able to satisfy in whole or in part.

***We may not be able to obtain patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984 in the United States and, as a result, our product candidates, if approved, may not have patent protection for a sufficient period.***

In the United States, the Drug Price Competition and Patent Term Restoration Act of 1984 permits one patent term extension of up to five years beyond the normal expiration of one patent per product, which if related to a method of treatment patent, is limited to the approved indication. The extension is typically calculated based on the clinical trial and FDA review periods, subject to statutory limits, including a cap such that the extended term generally may not exceed fourteen years from the date of drug approval.

We may not receive the full benefit of a possible patent term extension, or any extension at all, for reasons including selection of an ineligible patent, failure to apply within the required time periods, failure to apply prior to patent expiration or other failure to satisfy any other requirements. In addition, the FDA and the USPTO may not agree with our assessment of eligibility or the length of any extension and may refuse to grant, or may grant a more limited extension than, what we requested. If this occurs, competitors may be able to obtain approval of competing products following patent expiration and may launch their product earlier than might otherwise be the case, which could adversely affect on our ability to generate product revenue.

In the European Union, supplementary protection certificates may be available to extend a patent term by up to five years to compensate for time lost during regulatory review, and this period may be extended to five and a half years if certain pediatric clinical data requirements are met. These certificates are currently granted by the national patent offices on a country-by-country basis, which can require significant resources and may result in certificates being granted in some, but not all, countries, or not at all.

***Weakening patent laws and enforcement by courts in the United States and changes in the legal landscape may impact our ability to protect our markets.***

The U.S. Supreme Court has issued opinions in patent cases in recent years that many consider may weaken patent protection in the United States, including by narrowing the scope of patent protection available in certain circumstances, limiting patentable subject matter, or otherwise making it easier to invalidate patents in court. In addition, there have been proposals for additional changes to United States and foreign patent laws that, if adopted, could impact our ability to obtain patent protection for our proprietary technology, product candidates or future products or to enforce our patents. Depending

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on future actions by the U.S. Congress, the U.S. courts, the USPTO and law-making bodies in other countries, the laws and regulations governing patents could change in unpredictable ways that may weaken our ability to obtain new patents or enforce our existing patents and patents that we might obtain in the future.

In addition, enforcement and validity challenges in foreign jurisdictions can present additional uncertainty, difficulties and cost. If we encounter such difficulties in protecting or are otherwise precluded from effectively protecting our intellectual property rights in foreign jurisdictions, our business prospects could be substantially harmed. For example, we could become a party to foreign opposition proceedings, such as at the European Patent Office, or patent litigation and other proceedings in a foreign court. If so, uncertainties resulting from the initiation and continuation of such proceedings could have an adverse effect on our ability to compete in the marketplace. The cost of foreign adversarial proceedings can also be substantial, and in many foreign jurisdictions, the losing party must pay the attorney fees of the winning party.

***We may be subject to claims by third parties asserting that we, our employees, consultants or contractors have misappropriated third party's intellectual property or claiming ownership of what we regard as our own intellectual property.***

We employ individuals who were previously employed at universities and at other biotechnology or pharmaceutical companies, including competitors or potential competitors. We have also received confidential and proprietary information from collaborators, prospective licensees, and other third parties that may be subject to contractual confidentiality and non-use obligations. Although we attempt to ensure that our employees do not use the proprietary information or know-how of others in their work for us, we may be subject to claims that we or these employees have used or disclosed trade secrets or other proprietary information of a former employer or other third party, or that former employers or other third parties have an ownership interest in our patents.

Litigation may be necessary to defend against these claims. We may not be successful in defending these claims, and if we fail, we could be required to pay monetary damages, and could lose valuable intellectual property rights, such as exclusive ownership of, or the right to use valuable intellectual property. Even if we are successful, litigation could be costly, could cause reputational harm and could be a distraction to our management and other employees.

In addition, while it is our policy to require our employees, consultants, and contractors involved in developing intellectual property to execute agreements assigning any resulting intellectual property to us, we may be unsuccessful in executing such an agreement with each party who develops intellectual property that we regard as our own. Assignment agreements may not be self-executing or may be breached, and we may be forced to bring or defend claims to determine ownership of what we regard as our intellectual property. An employee or contractor could also create an invention but not inform us of it, in which case we could lose the benefit of the invention and that person could leave to develop the invention elsewhere.

***Obtaining and maintaining patent protection depends on compliance with various procedural, documentary, fee payment, and other requirements imposed by governmental patent offices, and the protection of our patents could be reduced or eliminated if we fail to comply with these requirements.***

Periodic maintenance fees on issued patents are due to be paid to the USPTO and annuity fees are due to be paid to foreign patent offices at various times over the life of a patent application and any resulting patent. Patent offices also impose numerous procedural, documentary, fee payment, and other requirements during patent prosecution. While inadvertent lapse can sometimes be cured by payment of late fees or other measures under applicable rules, there are situations in which noncompliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of a patent or patent rights in a jurisdiction. Noncompliance events that could result in abandonment or lapse of a patent or patent application include, but are not limited to, failure to respond to official actions within prescribed time limits, non-payment of fees, and failure to properly legalize and submit formal documents. If we experience abandonment of lapse, competitors may be able to enter the market, which would adversely affect our business.

***If we are unable to protect the confidentiality of our trade secrets, our business and competitive position would be harmed.***

In addition to patents, we rely on trade secrets, including unpatented know-how, technology, and other proprietary information, to maintain our competitive position. We seek to protect these trade secrets, in part, through non-disclosure, confidentiality and assignment agreements with parties who have access to them, such as our employees, corporate and scientific collaborators, contract manufacturers, consultants, advisors and other third parties.

These agreements may not effectively prevent disclosure of confidential information, may not result in effective assignment of intellectual property to us, and may not provide an adequate remedy in the event of unauthorized disclosure or other breaches of the agreements. In addition, others may independently discover our trade secrets and proprietary information, in which case we would not be able to assert trade secret rights against that third party.

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Despite our efforts, parties with access to our proprietary information, including our trade secrets, may breach their agreements and disclose or misappropriate our trade secrets, and we may not be able to obtain adequate remedies for such breaches. Enforcing trade secret claims is difficult, expensive and time-consuming, and the outcome is unpredictable. Some courts outside the United States are less willing or unwilling to protect trade secrets. If any of our trade secrets are lawfully obtained or independently developed by competitors, we would have no right to prevent their use, and our competitive position could be harmed.

***We only have limited geographical protection with respect to certain of our patents and we may not be able to protect our intellectual property rights throughout the world.***

Filing, prosecuting, maintaining and defending patents covering our product candidates in all countries throughout the world would be prohibitively expensive. As a result, our intellectual property rights in some countries ma be less extensive than the protection we might have in the United States. In-licensing patents covering our product candidates in all countries throughout the world may similarly be prohibitively expensive or unavailable. Even in jurisdictions in which we develop or commercialize our product candidates, it may be prohibitively expensive or impractical to obtain and maintain broad patent protection.

Competitors may use our and our licensors' technologies in jurisdictions where we have not obtained patent protection or licensed patents to develop their own products and may export otherwise infringing products to territories where we or our licensors have patent protection but where enforcement is less effective as in the United States or the European Union. These products may compete with our product candidates, and our or our licensors' patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

We may decide to abandon certain national and regional patent applications while they are still pending. The grant proceeding of each national or regional patent is an independent proceeding that may lead to situations in which applications may be rejected by the relevant patent office, while substantively similar applications are granted by others. For example, relative to other countries, China has a heightened detailed description requirement for patentability. Further, generic drug manufacturers or other competitors may challenge the scope, validity or enforceability of our or our licensors' patents, requiring us or our licensors to engage in complex, lengthy and costly litigation or other proceedings. Generic drug manufacturers may develop, seek approval for and launch generic versions of our potential future products. It is also quite common that depending on the country, the scope of patent protection may vary for the same product candidate or technology.

The laws of some jurisdictions do not protect intellectual property rights to the same extent as the laws or regulations in the United States and the European Union, and many companies have encountered significant difficulties in protecting and defending proprietary rights in such jurisdictions. Legal systems in certain countries may not favor enforcement of patents, trade secrets or other forms of intellectual property. We could become a party to foreign opposition proceedings (such as at the European Patent Office) or patent litigation and other proceedings in foreign courts, which can be lengthy and costly; in many jurisdictions, the losing party may be required to pay the winning party's attorneys' fees.

Proceedings to enforce our patent rights in foreign jurisdictions, whether or not successful, could result in substantial costs and divert attention from other aspects of our business, and could additionally put our or our licensors' patents at risk of being invalidated or interpreted narrowly, could increase the risk of our or our licensors' patent applications not issuing or could provoke third parties to assert claims against us. We may not prevail in any lawsuits or proceedings, and damages or other remedies may be awarded to the adverse party, which may be commercially significant. If we prevail, damages or other remedies awarded to us, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license. Further, while we intend to protect our intellectual property rights in our expected significant markets, we cannot ensure that we will be able to initiate or maintain similar efforts in all jurisdictions in which we may wish to market our product candidates. Accordingly, our efforts to protect our intellectual property rights in these countries may be inadequate, which may have an adverse effect on our ability to successfully commercialize our product candidates in all of our expected significant foreign markets. If we or our licensors encounter difficulties in protecting or are otherwise precluded from effectively protecting the intellectual property rights important for our business in such jurisdictions, the value of these rights may be diminished and we may face additional competition in those jurisdictions.

In some jurisdictions, compulsory licensing laws may compel patent owners to grant licenses to third parties, and in some countries limit the enforceability of patents against government agencies or government contractors. In such countries, patent owners may have limited remedies, which could materially diminish the value of the affected patents. If we or our licensors are forced to grant licenses to third parties under patents relevant to our business, or are prevented from enforcing patent rights, our competitive position in those jurisdictions could be substantially impaired.

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**Risks related to regulatory matters** 

***Receiving regulatory approval from the FDA and foreign regulatory authorities is lengthy, time-consuming and inherently unpredictable and, if we are ultimately unable to obtain marketing approval for our product candidates, our business will be substantially harmed.***

The amount of time required to obtain approval by the FDA and foreign regulatory authorities is unpredictable but typically takes many years following the commencement of clinical trials and depends upon numerous factors, including the substantial discretion of the regulatory authorities. In addition, approval standards, regulations or the type and amount of clinical data necessary to gain approval may change during the course of a product candidate's clinical development and may vary among jurisdictions. We have not obtained marketing approval for any product candidate, and it is possible that none of our existing product candidates, or any product candidates we may seek to develop in the future (independently or with one of our collaboration partners), will ever obtain marketing approval.

Our product candidates could fail to receive or retain marketing approval for many reasons, including the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the FDA or other regulatory authorities, may disagree with the design or implementation of our clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we may be unable to demonstrate to the satisfaction of the health authority that a product candidate is safe and effective for its proposed indication, or that it is of sufficient strength, identity, or quality in accordance with the health authority's standards;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• results of clinical trials may not meet the level of statistical significance required by the health authority for approval;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we may be unable to demonstrate that a product candidate's clinical and other benefits outweigh its safety risks;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the health authority may disagree with our interpretation of data from preclinical studies or clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• data collected from clinical trials of our product candidates may not have sufficient validity or quality to support the submission of an NDA to the FDA or other submission to a foreign regulatory authority or to obtain marketing approval in the United States or any other country or jurisdiction;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the health authority may find deficiencies with or fail to approve the manufacturing processes or facilities of third-party manufacturers with which we contract for clinical and commercial supplies; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the approval standards, policies, or regulations of a health authority may significantly change in a manner rendering our clinical data insufficient for approval.

This lengthy drug development process, as well as the unpredictability of future clinical trial results, may result in our failing to obtain regulatory approval to allow us to market any of our product candidates, which would significantly harm our business, results of operations, and prospects. The FDA and other health authorities have substantial discretion in the approval process and determining when or whether regulatory approval will be obtained for any of our product candidates, including in the context of accelerated approvals. Even if we believe the data collected from clinical trials of our product candidates are promising, that data may not be sufficient to support approval by the FDA or any other health authority.

In addition, even if we were to obtain approval, regulatory authorities may approve any of our product candidates for fewer or more limited indications than we request, may not approve the price we intend to charge for our products, may grant approval contingent on the performance of costly post-marketing clinical trials or may approve a product candidate with a label that does not include the labeling claims necessary or desirable for the successful commercialization of that product candidate. Any of the foregoing scenarios could materially harm the commercial prospects for our product candidates.

***Even if we obtain FDA approval for any of our product candidates in the United States, we may never obtain approval for or commercialize any of them in any other jurisdiction, which would limit our ability to realize their full market potential.***

In order to market any products in any particular jurisdiction, we must establish and comply with numerous and varying regulatory requirements on a country-by-country basis regarding safety and efficacy.

Approval by the FDA in the United States does not ensure approval by regulatory authorities in other countries or jurisdictions. However, the failure to obtain approval in one jurisdiction may negatively impact our ability to obtain approval elsewhere. In addition, clinical trials conducted in one country may not be accepted by regulatory authorities in other countries and regulatory approval in one country does not guarantee regulatory approval in any other country.

Approval processes vary among countries and can involve additional product testing and validation, and additional administrative review periods. Seeking foreign regulatory approval could result in difficulties and increased costs for us and require additional preclinical studies or clinical trials, which could be costly and time consuming. Regulatory

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requirements can vary widely from country to country and could delay or prevent the introduction of our products in those countries. We do not have any product candidates approved for sale in any jurisdiction, including in international markets, and we do not have experience as a company in obtaining regulatory approval in international markets. If we fail to comply with regulatory requirements in international markets or to obtain and maintain required approvals, or if regulatory approvals in international markets are delayed, our target market will be reduced and our ability to realize the full market potential of any product we develop will be unrealized.

***Even if we receive regulatory approval of any of our product candidates, we will be subject to ongoing regulatory obligations and continued regulatory review, which may result in significant additional expense, and we may be subject to penalties if we fail to comply with regulatory requirements or experience unanticipated problems with our product candidates.***

If any of our product candidates are approved, they will be subject to ongoing regulatory requirements for manufacturing, labeling, packaging, storage, advertising, promotion, sampling, record-keeping, conduct of post-marketing studies, and submission of safety, efficacy and other post-market information, including both federal and state requirements in the United States and requirements of comparable foreign regulatory authorities. In addition, FDA and comparable foreign regulatory authorities may impose additional requirements or limitations based on information we submit, such as requiring us to conduct post-approval studies in special populations that are difficult to conduct or complete. We will also be subject to continued compliance with cGMP and GCP requirements for any clinical trials that we conduct post-approval.

Manufacturers and manufacturers' facilities are required to comply with extensive FDA and comparable foreign regulatory authority requirements, including ensuring that quality control and manufacturing procedures conform to cGMP regulations and applicable product tracking and tracing requirements. As such, we and our CMOs will be subject to continual review and inspections to assess compliance with cGMP and adherence to commitments made in any NDA, other marketing application, and previous responses to inspection observations. Accordingly, we and others with whom we work must continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, production, and quality control.

Any regulatory approvals that we receive for our product candidates may be subject to limitations on the approved indicated uses for which the product may be marketed or to the conditions of approval, or contain requirements for potentially costly post-marketing testing, including Phase 4 clinical trials and surveillance to monitor the safety and efficacy of the product candidate. The FDA may also require a REMS program as a condition of approval of our product candidates, which could entail requirements for long-term patient follow-up, a medication guide, physician communication plans or additional elements to ensure safe use, such as restricted distribution methods, patient registries, and other risk minimization tools. Comparable foreign regulatory authorities may also have programs similar to REMS. In addition, if the FDA or a comparable foreign regulatory authority approves our product candidates, we will have to comply with requirements including submissions of safety and other post-marketing information and reports and registration.

The FDA may impose consent decrees or withdraw approval if compliance with regulatory requirements and standards is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown problems with our product candidates, including adverse events of unanticipated severity or frequency, or with our third-party CMOs or 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 restrictions or other restrictions under a REMS program. Other potential consequences include, among other things:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• restrictions on the marketing or manufacturing of our products, withdrawal of the product from the market or voluntary or mandatory product recalls;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• fines, warning letters, or holds on clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• refusal by the FDA to approve pending applications or supplements to approved applications filed by us or suspension or revocation of license approvals;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• product seizure or detention or refusal to permit the import or export of our product candidates; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• injunctions or the imposition of civil or criminal penalties.

The FDA strictly regulates 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. 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. However, physicians may, in their independent medical judgment, prescribe legally available products for off-label uses. The FDA does not regulate the behavior of physicians in their choice of treatments, but the FDA does restrict manufacturers'

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communications on the subject of off-label use of their products. The policies of the FDA and of comparable foreign regulatory authorities may change and additional government regulations may be enacted that could prevent, limit or delay regulatory approval of our product candidates. We cannot predict the likelihood, nature, or extent of government regulation that may arise from future legislation or administrative action, either in the United States or abroad. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained and we may not achieve or sustain profitability. In addition, the U.S. Supreme Court's June 2024 decision to overturn established case law giving deference to regulatory agencies' interpretations of ambiguous statutory language has introduced uncertainty regarding the extent to which the FDA's regulations, policies and decisions may become subject to increasing legal challenges, delays, and/or changes.

***A Breakthrough Therapy designation by the FDA, even if granted for any of our product candidates, may not lead to a faster development or regulatory review or approval process, and it does not increase the likelihood that our product candidates will receive marketing approval.***

We may seek Breakthrough Therapy designation for some or all of our current and future product candidates, including cemsidomide. A Breakthrough Therapy is defined as a drug that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates that the drug 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 product 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. Drugs designated as breakthrough therapies by the FDA may also be eligible for other expedited approval programs, including accelerated approval.

Designation as a Breakthrough Therapy is within the discretion of the FDA. Accordingly, even if we believe one of our product candidates meets the criteria for designation as a Breakthrough Therapy, the FDA may disagree and instead determine not to make such a designation. In any event, although Breakthrough Therapy designation is designed to expedite the development and review of drugs that receive such designation, the receipt of a Breakthrough Therapy designation for a product candidate may not result in a faster development process, review or approval compared to candidate products considered for approval under non-expedited FDA review procedures and does not assure ultimate approval by the FDA of a product candidate. In addition, even if one or more of our product candidates qualify as Breakthrough Therapies, the FDA may later decide that the product no longer meets the conditions for qualification. Thus, even though we intend to seek Breakthrough Therapy designation for our lead product candidates and some or all of our future product candidates for the treatment of various cancers, there can be no assurance that we will receive Breakthrough Therapy designations.

***A Fast Track designation by the FDA, even if granted for one or all of our lead product candidates, or any of our other current or future product candidates, may not lead to a faster development or regulatory review or approval process, and does not increase the likelihood that our product candidates will receive marketing approval.***

At various times, we may seek Fast Track designation for one or more of our product candidates. If a drug is intended for the treatment of a serious or life-threatening condition and the drug demonstrates the potential to address unmet medical needs for this condition, the drug sponsor may apply for FDA Fast Track designation for a particular indication. We may seek Fast Track designation for one or all of our lead product candidates and/or certain of our future product candidates, but there is no assurance that the FDA will grant this status to any of our proposed product candidates and we might only be successful in receiving a Fast Track designation from the FDA for a product candidate after applying on more than one occasion. Marketing applications filed by sponsors of products in Fast Track development may qualify for priority review under the policies and procedures offered by the FDA, but the receipt of a Fast Track designation does not assure any such qualification or ultimate marketing approval by the FDA. The FDA has broad discretion whether or not to grant a Fast Track designation, so even if we believe a particular product candidate is eligible for this designation, there can be no assurance that the FDA would decide to grant it. Even if we do receive a Fast Track designation, and even though Fast Track designation is designed to expedite the development and review of drugs that receive such designation, we may not experience a faster development process, review or approval compared to conventional FDA procedures, and receiving a Fast Track designation does not provide assurance of ultimate FDA approval. In addition, the FDA may withdraw a Fast Track designation if it believes that the designation is no longer supported by data from our clinical development program. In addition, the FDA may withdraw any Fast Track designation at any time.

***We have obtained Orphan Drug Designation for cemsidomide for the treatment of MM and, if we decide to seek Orphan Drug Designation for any other current or future product candidates, we may be unsuccessful or may be unable to***

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***maintain the benefits associated with Orphan Drug Designation, including the potential for supplemental market exclusivity.***

In August 2021, the FDA granted Orphan Drug Designation to cemsidomide for the treatment of MM. We may seek Orphan Drug Designation for one or more of our other current or future product candidates. Regulatory authorities in some jurisdictions, including the United States and the European Union, may designate drugs for relatively small patient populations as orphan drugs. Under the Orphan Drug Act, the FDA may grant an Orphan Drug Designation to a drug intended to treat a rare disease or condition, defined as a disease or condition with a patient population of fewer than 200,000 in the United States, or a patient population greater than 200,000 in the United States when there is no reasonable expectation that the cost of developing and making available the drug in the United States will be recovered from sales in the United States for that drug. In the United States, receipt of an Orphan Drug Designation entitles a party to financial incentives such as opportunities for grant funding towards clinical trial costs, tax advantages and user-fee waivers. After the FDA grants Orphan Drug Designation, the generic identity of the drug and its potential orphan use are disclosed publicly by the FDA. Although Orphan Drug Designation is intended to incent drug development for rare diseases or conditions, Orphan Drug Designation does not convey any advantage in, or shorten the duration of, the regulatory review and approval process. In addition, while receipt of Orphan Drug Designation may result in a waiver of any obligation by FDA to conduct studies in pediatric populations, such waiver may not apply to oncology drugs

If a product that has an Orphan Drug Designation subsequently receives the first FDA approval for a particular active ingredient for the disease for which it has such designation, the product is entitled to orphan product exclusivity, which means that the FDA may not approve any other applications, including an NDA, to market the same drug for the same indication for seven years, except in limited circumstances such as a showing of clinical superiority to the product with orphan drug exclusivity or if the FDA finds that the holder of the orphan drug exclusivity has not shown that it can assure the availability of sufficient quantities of the orphan drug to meet the needs of patients with the disease or condition for which the drug was designated. As a result, even if one of our product candidates receives orphan drug exclusivity, the FDA can still approve other drugs that have a different active ingredient for use in treating the same indication or disease. Further, the FDA can waive orphan drug exclusivity if we are unable to manufacture sufficient supply of our product.

We may also seek Orphan Drug Designations for some or all of our other current or future product candidates in additional orphan indications in which there is a medically plausible basis for the use of these product candidates. Even when we obtain an Orphan Drug Designation, exclusive marketing rights in the United States may be limited if we seek approval for an indication broader than the orphan designated indication and may be lost if the FDA later determines that the request for designation was materially defective or if we, through our manufacturer, are unable to assure sufficient quantities of the product to meet the needs of patients with the rare disease or condition. In addition, even if we seek Orphan Drug Designation for other product candidates, we may never receive these designations. For example, the FDA has expressed concerns regarding the regulatory considerations for Orphan Drug Designation as applied to tissue agnostic therapies and the FDA may interpret the FDCA and its orphan drug regulations, in a way that limits or blocks our ability to obtain an Orphan Drug Designation or orphan drug exclusivity, if our product candidates are approved, for our targeted indications.

***We may seek approval of our product candidates, where applicable, under the FDA's accelerated approval pathway. This pathway may not lead to a faster development or regulatory review or approval process and it does not increase the likelihood that our product candidates will receive marketing approval.***

We plan to seek accelerated approval of our lead product candidate, cemsidomide, and may seek approval of future product candidates, where applicable, using the FDA's accelerated approval pathway. A product may be eligible for accelerated approval if it treats a serious or life-threatening condition and generally provides a meaningful advantage over available therapies. In addition, it must demonstrate an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit, or on a clinical endpoint that can be measured earlier than irreversible morbidity or mortality, or IMM, that is reasonably likely to predict an effect on IMM or other clinical benefit. Under the Food and Drug Omnibus Reform Act, commonly referred to as FDORA, the FDA is permitted to require that a post-approval confirmatory study or studies be underway prior to approval or within a specified time period after the date accelerated approval is granted. FDORA also requires sponsors to send updates to the FDA every 180 days on the status of these studies, including progress towards enrollment targets, and the FDA must promptly post this information publicly. FDORA also gives the FDA increased authority to withdraw accelerated approval on an expedited basis if the sponsor fails to conduct such activities in a timely manner, send the necessary updates to the FDA, or if such post-approval studies fail to verify the drug's predicted clinical benefit; and to take action, such as issuing fines, against companies that fail to conduct with due diligence any post-approval confirmatory study or submit timely reports to the agency on their progress. In addition, the FDA generally requires pre-approval of promotional materials for products receiving accelerated approval, which could adversely impact the timing of the commercial launch of the product. Thus, even if we seek to utilize the accelerated approval pathway for any of our product candidates, we may not be able to obtain accelerated approval, and even if we do, that product may not

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experience a faster development or regulatory review or approval process. In addition, receiving accelerated approval does not assure the product's accelerated approval will eventually be converted to a traditional approval.

***The FDA may identify in a written request that pediatric information would be beneficial for a product candidate for which we obtained approval and request that we conduct pediatric studies. We may elect not to perform these studies or, if we opted to conduct these studies, we may not be able to complete them or the data generated from these studies may not be acceptable to the FDA.***

Section 505A of the FDC Act provides incentives to drug manufacturers who conduct studies of drugs in children. Referred to as the "pediatric exclusivity provision," this law provides an additional six months of non-patent exclusivity to pharmaceutical manufacturers that conduct acceptable pediatric studies of new and currently-marketed drug products for which pediatric data would be beneficial pursuant to a written request by the FDA. As a result, if we received a written request for pediatric studies from the FDA, conducted pediatric clinical studies and submitted reports that were accepted by the FDA within the statutory time limits, we could receive an additional six-months of regulatory exclusivity beyond all other types of patent and non-patent exclusivity then in effect for all our approved drug products that contain the active moiety for which pediatric exclusivity was granted. However, even if we received a written request for pediatric studies from the FDA for one or more of our drug products, we may determine not to or be unable to carry out pediatric studies that comply with Section 505A of the FDCA, or we may carry out studies that are not accepted by the FDA for this purpose. If this situation were to arise, we would not receive this six-month regulatory exclusivity extension.

***Disruptions at the FDA, the SEC and other government agencies caused by the change in presidential administration, funding shortages or potential funding shortages 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, which could negatively impact our business and our timelines.***

The ability of the FDA to review and clear or 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, substantial changes in leadership and shifting policy priorities as a result of changes in the presidential administration and its appointees tasked to oversee the agency, and statutory, regulatory, and policy changes. Average review times at the agency have fluctuated as a result of these factors. In addition, government funding of the SEC, and other government agencies on which our operations may rely is subject to the impacts of political events, which are inherently fluid and unpredictable. For example, the U.S. government has issued certain policies and executive orders directed towards reducing the employee headcount and costs associated with U.S. administrative agencies, including the FDA, and it remains unclear the degree to which these efforts may limit or otherwise adversely affect the FDA's ability to conduct routine activities.

Disruptions and personnel turnover, as a result of leadership changes, staff reductions or otherwise, at the FDA and other agencies, including as a result of government shutdowns, such as the one that occurred must recently in October 2025, workforce furloughs, reductions in force and significant organizational changes, may slow the time necessary for review and approval (including any applications we may file with respect to our current and future product candidates), which could adversely affect our business. Changes and cuts in FDA staffing have been reported by some in the pharmaceutical industry as creating instances of delays in the FDA's responsiveness or in its ability to review IND submissions or applications, issue regulations or guidance, or implement or enforce regulatory requirements in a timely fashion or at all. These funding and staffing changes at the FDA, SEC or other regulatory agencies may delay review of our submissions or public filings, which in turn could negatively impact our business or operations.

***Our relationships with customers, healthcare providers, and third-party payors are or will be subject, directly or indirectly, to foreign, federal and state healthcare fraud and abuse laws, false claims laws, health information privacy and security laws, and other healthcare laws and regulations. If we are unable to comply or have not fully complied with these laws, we could face substantial penalties.***

Healthcare providers and third-party payors in the United States and elsewhere will play a primary role in the recommendation and prescription of any product candidates for which we obtain marketing approval. Our current and future arrangements with healthcare professionals, principal investigators, consultants, customers and third-party payors subject us to various federal and state fraud and abuse laws and other healthcare laws that may constrain the business or financial arrangements and relationships through which we research, sell, market and distribute our product candidates, if we obtain marketing approval. In particular, the research of our product candidates, as well as the promotion, sales and marketing of healthcare items and services, as well as certain business arrangements in the healthcare industry, are subject to extensive laws designed to: (i) prevent fraud, kickbacks, self-dealing and other abusive practices, (ii) guarantee the security and privacy of health information, and (iii) increase transparency around the financial relationships between physicians, teaching hospitals and manufacturers of drugs, medical devices and biologics. These laws and regulations may

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restrict or prohibit a wide range of pricing, discounting, marketing and promotion, structuring and commission(s), certain customer incentive programs and other business or financial arrangements. See the sections entitled "*Business — Other Healthcare Laws*" and "*Business — Healthcare Reform*" in this Annual Report on Form 10-K.

Ensuring that our business arrangements and practices with third parties comply with applicable healthcare laws and regulations will likely be costly. 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, disgorgement, imprisonment, exclusion from participating in government funded healthcare programs such as Medicare and Medicaid, additional reporting requirements and oversight if we become subject to a corporate integrity agreement or similar agreement to resolve allegations of non-compliance with these laws, contractual damages, reputational harm, and the curtailment or restructuring of our operations. The shifting compliance environment and the need to build and maintain robust and expandable systems to comply with multiple jurisdictions with different compliance or reporting requirements increases the possibility that a healthcare company may run afoul of one or more of the requirements.

If the physicians or other providers or entities with whom we expect to do business are found not to comply with applicable laws, they may be subject to significant criminal, civil or administrative sanctions, including exclusions from government funded healthcare programs. Even if resolved in our favor, litigation or other legal proceedings relating to healthcare laws and regulations may cause us to incur significant expenses and could distract our technical and management personnel from their normal responsibilities. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments. If securities analysts or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common stock. Litigation or proceedings of this nature could substantially increase our operating losses and reduce the resources available for development, manufacturing, sales, marketing or distribution activities. Uncertainties resulting from the initiation and continuation of litigation or other proceedings relating to applicable healthcare laws and regulations could have an adverse effect on our ability to compete in the marketplace.

***The successful commercialization of our product candidates in the United States and abroad will depend in part on the extent to which third-party payors, including governmental authorities and private health insurers, provide coverage and adequate reimbursement levels, as well as implement pricing policies favorable for our product candidates. Failure to obtain or maintain coverage and adequate reimbursement for our product candidates, if approved, could limit our ability to market those products and decrease our ability to generate revenue.***

Significant uncertainty exists as to the coverage and reimbursement status of any products for which we may obtain regulatory approval. In the United States and in other countries, 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. The availability of coverage and adequacy of reimbursement for our products by third-party payors, including government health care programs (e.g., Medicare, Medicaid or TRICARE in the United States), managed care providers, private health insurers, health maintenance organizations and other organizations is essential for most patients to be able to afford medical services and pharmaceutical products such as our product candidates. Third-party payors decide which medications they will pay for and establish reimbursement levels. See the section entitled "*Business — Coverage and Reimbursement*" in this Annual Report on Form 10-K

Our ability to successfully commercialize our product candidates will depend in part on the extent to which coverage and adequate reimbursement for our products and related treatments will be available from third-party payors. Moreover, a payor's decision to provide coverage for a product does not imply that an adequate reimbursement rate will be approved. If coverage and adequate reimbursement is not available, or is available only to limited levels, we may not be able to successfully commercialize our product candidates. Even if coverage is provided, the approved reimbursement amount may not be high enough to allow us to establish or maintain pricing sufficient to realize a sufficient return on our investment. A decision by a third-party payor not to cover or not to separately reimburse for our medical products or therapies using our products could reduce physician utilization of our products once approved.

We cannot be sure that coverage and reimbursement in the United States and other countries will be available for our current or future product candidates or for any procedures using our current or future product candidates, and any reimbursement that may become available may not be adequate or may be decreased or eliminated in the future.

In the United States, no uniform policy for coverage and reimbursement for products exists among third-party payors. Therefore, coverage and reimbursement for our products can differ significantly from payor to payor. The process for determining whether a payor will provide coverage for a product may be separate from the process for setting the reimbursement rate that the payor will pay for the product. One payor's determination to provide coverage for a product

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does not assure that other payors will also provide coverage and reimbursement for the product. Third-party payors may also limit coverage to specific products on an approved list, or formulary, which might not include all of the FDA-approved products for a particular indication. The principal decisions about reimbursement for new medicines in the United States are typically made by the Centers for Medicare & Medicaid Services, or CMS, an agency within HHS. CMS will decide whether and to what extent our products will be covered and reimbursed under Medicare and private payors tend to follow CMS to a substantial degree. Factors considered by payors in determining reimbursement are based on whether the product is:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a covered benefit under its health plan;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• safe, effective, and medically necessary;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• appropriate for the specific patient;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• cost-effective; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• neither experimental nor investigational.

We cannot be sure that coverage and reimbursement will be available for or accurately estimate the potential revenue from our product candidates or assure that coverage and reimbursement will be available for any product that we may develop.

Further, increasing efforts by third-party payors in the United States and abroad to cap or reduce healthcare costs may cause payor organizations to limit both coverage and the level of reimbursement for newly approved products and, as a result, they may not cover or provide adequate payment for our product candidates. In order to secure coverage and reimbursement for any product that might be approved for sale, we may need to conduct expensive pharmacoeconomic studies in order to demonstrate the medical necessity and cost-effectiveness of our products, in addition to the costs required to obtain FDA or comparable regulatory approvals. Additionally, we may also need to provide discounts to purchasers, private health plans or government healthcare programs. Our product candidates may nonetheless not be considered medically necessary or cost-effective. If third-party payors do not consider a product to be cost-effective compared to other available therapies, they may not cover the product after approval as a benefit under their plans or, if they do, the level of payment may not be sufficient to allow a company to sell its products at a profit. We expect to experience pricing pressures from third-party payors in connection with the potential sale of any of our product candidates.

Lastly, in some foreign countries, the proposed pricing for a drug must be approved before it may be lawfully marketed. The requirements governing drug pricing vary widely from country to country. For example, EU Member States can restrict the range of medicinal products for which their national health insurance systems provide reimbursement and they can control the prices of medicinal products for human use. To obtain reimbursement or pricing approval, some of these countries may require the completion of clinical trials that compare the cost effectiveness of a particular product candidate to currently available therapies. An EU Member State may approve a specific price for the medicinal product, or it may instead adopt a system of direct or indirect controls on the profitability of the company placing the medicinal product on the market. Approaches between EU Member States are diverging. For example, in France, effective market access will be supported by agreements with hospitals and products may be reimbursed by the French social security system. The price of medicines is negotiated with the Economic Committee for Health Products. 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 of our product candidates. Historically, products launched in the European Union do not follow price structures of the United States and generally prices in the European Union tend to be significantly lower than prices in the United States.

***Enacted and future healthcare legislation may increase the difficulty and cost for us to progress our clinical programs and obtain marketing approval of and commercialize our product candidates and may affect the prices we may set.***

In the United States and other jurisdictions, there have been, and we expect there will continue to be, a number of legislative and regulatory changes and proposed changes to the healthcare system that could affect our future results of operations. In particular, there have been and continue to be a number of initiatives at the U.S. federal and state levels that seek to reduce healthcare costs and improve the quality of healthcare. Individual states in the United States have also increasingly passed legislation and implemented regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures and, in some cases, designed to encourage importation from other countries and bulk purchasing. See the section entitled "*Business — Government Regulation - Healthcare Reform*" in this Annual Report on Form 10-K.

We expect that additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the extent to which state and federal governments cover particular healthcare products and services, and could limit the amounts that the federal and state governments will pay for healthcare products and services, or cause us to need to

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identify or engage alternate service providers. This could result in reduced demand for any product candidate we develop, additional pricing pressures, delayed or limited supply of materials needed for our research or development activities, or other adverse effects to our financial condition and business prospects.

In markets outside of the United States, reimbursement and healthcare payment systems vary significantly by country and many countries have instituted price ceilings on specific products and therapies. The price control regulations outside of the United States can have a significant impact on the profitability of a given market, and further uncertainty is introduced if and when these laws change.

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative action in the United States or any other jurisdiction. The continuing efforts of the government, insurance companies, managed care organizations and other payors of healthcare services to contain or reduce costs of healthcare and/or impose price controls may adversely affect:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the demand for our product candidates, if we obtain regulatory approval;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to set a price that we believe is fair for our approved products;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to generate revenue and achieve or maintain profitability;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the level of taxes that we are required to pay; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the availability of capital.

If we or any third parties we may engage are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we or these third parties are not able to maintain regulatory compliance, our product candidates may lose any regulatory approval that may have been obtained and we may not achieve or sustain profitability.

***We may face potential liability under applicable privacy and data protection laws, rules, regulations, or standards or contractual obligations in the United States, the European Union, the United Kingdom, or other jurisdictions with respect to our processing of personal information, including patient health information from clinical trials sponsored by us and compliance with these evolving requirements could require significant resources and adversely affect our business.***

Most healthcare providers in the U.S., including research institutions from which we may obtain patient health information, are subject to privacy and security regulations promulgated under the Health Insurance Portability and Accountability Act of 1966, or HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act. We could be subject to civil, criminal, and administrative penalties if we obtain, use, or disclose individually identifiable health information maintained by a HIPAA-covered entity in a manner not authorized or permitted by HIPAA. We may also be subject to state laws requiring notification of affected individuals and state regulators in the event of a breach of personal information, which is broader than the health information protected by HIPAA. Failing to keep personal information secure may lead to claims or liability under HIPAA, other applicable laws, or our contracts with HIPAA-covered entities and may constitute unfair acts or practices in or affecting commerce in violation of Section 5(a) of the Federal Trade Commission Act, or the FTC Act. The FTC's guidance for securing consumers' personal information is similar to what is required by HIPAA, but this guidance may change in the future, resulting in increased complexity and the need to expend additional resources to ensure compliance.

In the U.S., more than 20 states have passed or proposed broad comprehensive privacy laws, which are similar but may differ in material ways, and may require additional investment in compliance programs, impact data collection strategies and the availability of previously useful data and potentially increasing compliance costs or require changes in business practices and policies.

Further, the federal government and several states have restricted data transactions involving countries outside of the U.S. For example, the Department of Justice's January 8, 2025, Rule on Preventing Access to U.S. Sensitive Personal Data and Government-Related Data by Countries of Concern or Covered Persons prohibits transfers of certain data, including health data, genetic data, and biospecimens to countries of concern, including China. The rule also prohibits covered businesses from engaging in certain investment agreements, employment agreements or vendor agreements involving such data and countries of concern, absent specified cybersecurity controls. Violations of these laws and regulations may be punishable by criminal or civil sanctions, result in exclusion from participation in federal and state programs or restrict our ability to use certain vendors, sites, investigators, or service providers in global clinical trials.

Outside of the United States, we face stringent privacy and data protection laws. The European Economic Area, or EEA, adopted the European Union General Data Protection Regulation, or EU GDPR, and the EU GDPR, as transposed into the laws of the United Kingdom, the UK GDPR, collectively referred to as the GDPR. The GDPR imposes stringent data protection compliance requirements on controllers and processors of personal data of subjects located in the EEA and UK,

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including special protections for health, biometric, and genetic information and provides for significant penalties for noncompliance. Further, the GDPR provides a broad right for EEA Member States to create supplemental national laws relating to the processing of health, genetic, and biometric data, potentially limiting our ability to use and share such data or causing our costs to increase, and harming our business and financial condition.

We may be subject to the supervision of local data protection authorities in jurisdictions where our business activities involve monitoring the behavior of individuals in the EEA or UK (for example, when undertaking clinical trials). The GDPR confers a private right of action on data subjects and consumer associations, introduces mandatory data breach notification requirements, requires us to maintain records of our processing activities and to document data protection impact assessments where there is high risk processing, imposes additional obligations on us when we are contracting with service providers, requires appropriate technical and organizational measures to safeguard personal data, and requires us to adopt appropriate privacy governance including policies, procedures, training, and data audits.

The GDPR also imposes strict rules on the transfer of personal data out of the EEA and UK to jurisdictions that have not been deemed to offer "adequate" privacy protections, including the United States in certain circumstances, unless a derogation or adequate international transfer safeguards exist. In certain instances, we may be required to carry out transfer impact assessments to ensure the law in the recipient country provides "essentially equivalent" personal data protections as those provided in the EEA and UK, and may be required to adopt supplementary measures if this standard is not met. Any inability to transfer personal data from the EEA to the United States in compliance with data protection laws may impede our ability to conduct trials and may adversely affect our business and financial position.

We take steps to comply with the GDPR when applicable to us, but compliance is a rigorous and time-intensive process that may increase our cost of doing business or require us to change our business practices. Noncompliance with the GDPR or other applicable EEA and UK laws and regulations could subject us to significant financial penalties and in the event of noncompliance, or perceived noncompliance, we could be subject to litigation or adverse publicity, which could materially and adversely affect us.

The respective provisions and enforcement of the EU GDPR and UK GDPR have already and may in the future diverge and EEA Member States have adopted national laws to implement the GDPR that may partially deviate from the GDPR and the EEA Member States may interpret GDPR obligations slightly differently, which may create additional regulatory challenges and uncertainties for us, could increase legal risk, complexity and cost to our handling of personal data and may require us to adapt our privacy and data security compliance programs.

Outside of the United States and Europe, many jurisdictions in which we have CROs or otherwise do business are also considering or have enacted comprehensive data protection legislation to which we may become subject. The global data protection landscape is rapidly evolving, and we may be or become subject to numerous federal, state and foreign laws and regulations governing the collection, use, disclosure, transfer, security and processing of personal information, such as information that we collect about participants and healthcare providers in connection with clinical trials. Implementation standards and enforcement practices are likely to remain uncertain for the foreseeable future, which may create risk in our business, affect our or our service providers' ability to operate in certain jurisdictions or to collect, store, transfer, use or share personal information, result in liability or impose additional compliance or other costs on us. Any failure or perceived failure by us to comply with federal, state or foreign laws or self-regulatory standards could result in negative publicity, diversion of management time and effort or proceedings against us.

If our CMOs, CROs or other contractors or consultants fail to comply with applicable regulatory requirements, we could be subject to a range of regulatory actions that could affect our or our contractors' ability to develop and commercialize our product candidates or could harm or prevent sales of any future products, or could substantially increase the costs and expenses of developing, commercializing, and marketing our product candidates or any future products.

***If we or our third-party manufacturers and suppliers fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or penalties or incur costs that could have an adverse effect on the success of our business.***

We are subject to numerous environmental, health, and safety laws and regulations, including those governing laboratory procedures and the handling, use, storage, treatment, and disposal of hazardous materials and wastes. Our research and development activities involve the use of biological and hazardous materials and produce hazardous waste products. We generally contract with third parties for the disposal of these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials, which could cause an interruption of our commercialization efforts, research and development efforts and business operations, environmental damage resulting in costly clean-up and liabilities under applicable laws and regulations governing the use, storage, handling, and disposal of these materials and specified waste products. Although we believe that the safety procedures utilized by our third-party CMOs for handling and disposing of these materials generally comply with the standards prescribed by these laws and regulations, we cannot guarantee that this

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is the case or eliminate the risk of accidental contamination or injury from these materials. Upon an event of this nature, we may be held liable for any resulting damages and such liability could exceed our resources and state or federal or other applicable authorities may curtail our use of certain materials and/or interrupt our business operations. Further, environmental laws and regulations are complex, change frequently, and have tended to become more stringent. We cannot predict the impact of any changes of this nature and cannot be certain of our future compliance. In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These current or future laws and regulations may impair our research, development, or production efforts. Failure to comply with these laws and regulations also may result in substantial fines, penalties, or other sanctions.

Although we maintain workers' compensation insurance to cover us for costs and expenses, we may incur due to injuries to our employees resulting from the use of hazardous materials or other work-related injuries, this insurance may not provide adequate coverage against potential liabilities. We do not carry specific biological waste or hazardous waste insurance coverage, workers compensation or property and casualty and general liability insurance policies that include coverage for damages and fines arising from biological or hazardous waste exposure or contamination.

***We are subject to United States and certain foreign export and import controls, sanctions, embargoes, anti-corruption laws and anti-money laundering laws and regulations. Compliance with these legal standards could impair our ability to compete in domestic and international markets. We can face criminal liability and other serious consequences for violations, which can harm our business.***

We are subject to export control and import laws and regulations, including the U.S. Export Administration Regulations, U.S. Customs regulations, various economic and trade sanctions regulations administered by the U.S. Treasury Department's Office of Foreign Assets Controls, the U.S. Foreign Corrupt Practices Act of 1977, as amended, the U.S. domestic bribery statute contained in 18 U.S.C. § 201, the U.S. Travel Act, the USA PATRIOT Act of 2001 and other state and national anti-bribery and anti-money laundering laws in the countries in which we conduct activities. Anti-corruption laws are interpreted broadly and prohibit companies and their employees, agents, contractors, and other collaborators from authorizing, promising, offering or providing, directly or indirectly, improper payments or anything else of value to recipients in the public or private sector. In the future, we may engage third parties for clinical trials outside of the United States, to sell our products abroad once we enter a commercialization phase and/or to obtain necessary permits, licenses, patent registrations, and other regulatory approvals. We may also have direct or indirect interactions with officials and employees of government agencies or government-affiliated hospitals, universities, and other organizations. We can be held liable for the corrupt or other illegal activities of our employees, agents, contractors, and other collaborators, even if we do not explicitly authorize or have actual knowledge of these activities. Any violations of the laws and regulations described above may result in substantial civil and criminal fines and penalties, imprisonment, the loss of export or import privileges, debarment, tax reassessments, breach of contract and fraud litigation, reputational harm, and other consequences.

***We use artificial intelligence throughout our business in our ongoing effort to be innovative and increase efficiency, but the challenges we may face in its implementation and use could adversely impact our business.***

As part of our continuous effort to be innovative and increase efficiency throughout our business, we employ artificial intelligence (AI) and machine learning as a tool, including to assist in degrader discovery and optimization. While there are advantages to AI and machine learning, there are also inherent risks with its use, including risks related to accuracy, AI hallucinations, cybersecurity, data privacy, information technology, intellectual property, regulatory, legal, operational, competitive, reputational, and other risks and challenges that could adversely affect our business. Moreover, the regulatory landscape surrounding the use of AI, both in the U.S. and abroad, is complex and continuously evolving. In the U.S., a number of states have advanced laws focusing on AI governance and regulation. At the federal level, the Trump Administration has endorsed a federal moratorium on the enforcement of state AI laws, including through a December 11, 2025 executive order on "Ensuring a National Policy Framework for Artificial Intelligence," though states continue to act on AI regulation. In the European Union, the Artificial Intelligence Act recently passed, with further regulations expected to come. These new laws contribute to a complicated legislative patchwork and could subject us to increased compliance costs, and we may face costly enforcement actions or litigation in the event of any actual or perceived non-compliance. We may not be able to adequately mitigate the various risks we could face as a result of our use of AI, and this could adversely affect our business, financial condition, and operations.

**Risks related to employee matters, managing growth, and operational matters**

***We are highly dependent on our key personnel and anticipate hiring new key personnel. If we are not successful in attracting and retaining highly qualified personnel, we may not be able to successfully implement our business strategy.***

Our ability to compete in the highly competitive biotechnology and pharmaceutical industries depends upon our ability to attract and retain highly qualified managerial, scientific, medical personnel, sales and marketing, and other personnel. We

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are highly dependent on our management, scientific and medical personnel, including our President and Chief Executive Officer, Chief Scientific Officer, Chief Medical Officer, Chief Financial Officer, Chief People Officer, and Chief Business Officer. The loss of the services of any of our executive officers, other key employees, and other scientific and medical advisors, and an inability to find suitable replacements could result in delays in product development, and harm our business. While we expect to engage in an orderly transition process if and when we integrate newly appointed officers and managers, we face a variety of risks and uncertainties relating to management transition, including diversion of management attention from business concerns, failure to retain other key personnel, or loss of institutional knowledge.

We conduct our operations at our facilities in Watertown, Massachusetts. The Massachusetts region is headquarters to many other biopharmaceutical companies and many academic and research institutions. Competition for skilled personnel in our market is intense and may limit our ability to hire and retain highly qualified personnel on acceptable terms or at all. Changes to U.S. immigration and work authorization laws and regulations, including those that restrain the flow of scientific and professional talent, can be significantly affected by political forces and levels of economic activity. Our business may be materially adversely affected if legislative or administrative changes to immigration or visa laws and regulations impair our hiring processes and goals or projects involving personnel who are not U.S. citizens.

To encourage valuable employees to remain at our company, in addition to salary and cash incentives, we have provided equity awards that vest over time or based on the achievement of milestones. The value to our employees of equity awards that vest over time may be significantly affected by movements in our stock price that are beyond our control and may, at any time, be insufficient to counteract more lucrative offers from other companies. The same may be true in respect of equity awards that vest based on the achievement of milestones. Despite our efforts to retain valuable employees, members of our management, scientific and development teams may terminate their employment with us on short notice. Although we have employment agreements with our executive employees, these employment agreements provide for at-will employment, which means that any of our executive employees could leave our employment at any time, with or without notice. Our success also depends on our ability to continue to attract, retain and motivate highly skilled junior, mid-level, and senior managers, as well as junior, mid-level, and senior scientific, medical, and general and administrative personnel.

In addition, we have scientific and clinical advisors who assist us in formulating our development and clinical strategies. These advisors are not our employees and may have commitments to, or consulting or advisory contracts with, other entities that may limit their availability to us. In addition, our advisors may have arrangements with other companies to assist those companies in developing products or technologies that may compete with ours.

***Our internal computer systems, or those of any of our collaborators, vendors, contractors, or consultants, may fail or suffer security breaches, incidents or compromises, which could result in a disruption of our product development programs and could harm our reputation or subject us to liability, and adversely affect our business and financial results.***

Our internal computer systems and those of any collaborators, vendors, contractors or consultants are vulnerable to damage from computer viruses, unauthorized access, natural disasters, terrorism, war, and telecommunication and electrical failures. We and certain of our service providers have experienced and may in the future experience cybersecurity incidents. If an event of this nature were to occur and cause interruptions in our operations, it could result in a material disruption of our development programs and our business operations, whether due to a loss of our trade secrets or other proprietary information or other similar disruptions. For example, the loss of clinical trial data from completed or future clinical trials could result in delays in our marketing approval efforts and significantly increase our costs to recover or reproduce the data. Bad actors around the world use increasingly sophisticated methods, including the use of AI, to engage in illegal activities involving the theft and misuse of personal information, confidential information, and intellectual property. To the extent that any disruption, security breach, incident or compromise were to result in a loss of or damage to our data or applications or the inappropriate disclosure of confidential or proprietary information, we could incur liability, our competitive position could be harmed, and the further development and commercialization of our product candidates could be delayed. Additionally, we may have data security obligations with respect to the information of third parties that we store. Unauthorized access or use of any third-party data or information of this nature could result in fines or other penalties that may impact our relationships with these third parties and our operations.

Any actual or perceived security breach, incident or compromise of our platform, systems, and networks could damage our reputation and brand, expose us to a risk of litigation and possible liability, and require us to expend significant capital and other resources to respond to and alleviate problems caused by the security breach. Our ability to maintain adequate cyber-crime and liability insurance may be reduced. Some jurisdictions have enacted laws requiring companies to notify individuals of data security breaches involving certain types of personal data and our agreements with certain partners require us to notify them in the event of a security incident. These types of mandatory disclosures are costly, could lead to negative publicity, and may cause our partners to lose confidence in the effectiveness of our data security measures. Any of these events could harm our reputation or subject us to liability, and materially and adversely affect our business and

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financial results. Although we maintain cyber liability insurance, we cannot be certain that its coverage will be adequate for liabilities actually incurred or that insurance will continue to be available to us on economically reasonable terms, or at all.

***Our employees, independent contractors, vendors, principal investigators, CROs, and consultants may engage in misconduct or other improper activities, including non-compliance with regulatory standards and requirements, and insider trading laws.***

We are exposed to the risk that our employees, independent contractors, vendors, principal investigators, CROs, CMOs, and consultants may engage in fraudulent conduct or other illegal activity. Misconduct by these parties could include, among other things:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• intentional, reckless, or negligent conduct or disclosure of unauthorized activities that violate study and trial protocols or the regulations of the FDA or similar foreign regulatory authorities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• violations of healthcare fraud and abuse laws and regulations in the United States and abroad;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• violations of U.S. federal securities laws relating to trading in our common stock; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• failures to report financial information or data accurately.

In particular, sales, marketing, and business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, misconduct, kickbacks, self-dealing, and other abusive practices. These laws and regulations regulate a wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs, and other business arrangements. Other forms of misconduct could involve the improper use of information obtained in the course of clinical trials or creating fraudulent data in our preclinical studies or clinical trials, which could result in regulatory sanctions and cause serious harm to our reputation. We have adopted a code of business conduct and ethics and other corporate governance and compliance documents, policies and charters applicable to all of our employees. However, it is not always possible to identify and deter misconduct by employees and other third parties. Further, the precautions we take to detect and prevent this type of 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 comply with these laws or regulations. Additionally, we are subject to the risk that a person could allege fraud or other misconduct, even if none occurred. If any actions of this nature are instituted against us and we are not successful in defending ourselves or asserting our rights, those actions could have a significant impact on our business, including the imposition of civil, criminal and administrative penalties, damages, monetary fines, possible exclusion from participation in Medicare, Medicaid and other federal healthcare programs, contractual damages, reputational harm, diminished profits and future earnings, or curtailment of our operations, any of which could adversely affect our business prospects, financial condition, and results of operations.

**Risks related to our common stock**

***Future sales and issuances of our common stock or rights to purchase common stock and issuances of common stock upon the exercise of outstanding warrants would result in additional dilution of the percentage ownership of our stockholders and could cause our stock price to fall.***

We may choose to raise additional capital in the future through the sale of shares or other securities convertible into shares, depending on market conditions, strategic considerations, and operational requirements. To the extent we raise additional capital in this manner, our stockholders will be diluted. For example, in October 2024, we filed a registration statement on Form S-3, or the Registration Statement, with the SEC that became effective on November 13, 2024 and registered the offering, issuance and sale of an unspecified amount of common stock, preferred stock, debt securities, warrants and/or units of any combination thereof. Simultaneously, we entered into a sales agreement, or the Sales Agreement, with TD Securities (USA) LLC, or TD Cowen, as sales agent, to provide for the issuance and sale by us of up to $200.0 million of common stock from time to time in "at-the-market" offerings under the Registration Statement and related prospectus filed with the Registration Statement, or the 2024 ATM Program. To date, we have sold 3,769,483 shares of our common stock under the 2024 ATM Program for gross proceeds of approximately $9.6 million, before deducting commissions to TD Cowen. In November 2025, we filed a registration statement on Form S-3 and related prospectus for the offering and sale of up to a maximum aggregate offering price of $125.0 million of our common stock under the 2024 ATM Program.

In addition, as of the date of this Annual Report on Form 10-K, we had outstanding Class A Warrants exercisable for 50,608,500 shares of our common stock and Class B Warrants exercisable for 50,608,500 shares of our common stock, or collectively, the Class A and B Warrants, and pre-funded warrants to purchase 28,713,500 shares of our common stock. The pre-funded warrants may be exercised at any time after the date of issuance through either a nominal cash payment or a cashless exercise, at the holder's election, until all of the Pre-Funded Warrants are exercised in full, according to a formula set forth in the pre-funded warrant. Accordingly, we will not receive any meaningful additional funds upon the

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exercise of the pre-funded warrants. If some or all of these Class A and B Warrants and pre-funded warrants are exercised, our stockholders could experience substantial dilution and such exercise may cause the market price of our stock to decline.

Future issuances of our common stock or other equity securities, or the perception that sales of this nature may occur, could adversely affect the trading price of our common stock, and impair our ability to raise capital through future offerings of shares or equity securities. No prediction can be made as to the effect, if any, that future sales of common stock or the availability of common stock for future sales will have on the trading price of our common stock.

***Our outstanding Class A Warrants and Class B Warrants may not be exercised, and we may therefore not receive any additional funds notwithstanding our issuance of these warrants.***

As of the date of this Annual Report on Form 10-K, we had outstanding Class A Warrants exercisable for 50,608,500 shares of our common stock and Class B Warrants exercisable for 50,608,500 shares of our common stock. If all of these Class A and Class B Warrants were exercised for cash, we would receive an additional $224.7 million in gross proceeds from the 2025 Offering. However, the warrant holders are not currently obligated to exercise these warrants, which means that we may receive little to no additional proceeds notwithstanding our issuance of these warrants. Both the Class A and Class B Warrants have an exercise price of $2.22 per share of common stock (or $2.2199 per pre-funded warrant) and are exercisable at any time after the date of issuance. The Class A Warrants expire on the earlier of (i) 30 calendar days following the public release of nine-month median follow-up data from any expansion cohort in our planned Phase 1b trial of cemsidomide with elranatamab, or (ii) the fifth anniversary of the date of issuance. The Class B Warrants expire on the fifth anniversary of the date of issuance. The holders of these warrants are unlikely to exercise their warrants voluntarily unless our stock price is above the exercise price and we cannot provide any assurance that our stock price will meaningfully exceed the exercise price before the warrants expire. If our stock price remains at or below the exercise price, the warrants will likely expire unexercised, and we will not receive any additional funds from these warrants to support our clinical trials and operations.

While we have the right to mandatorily require exercise of the Class B Warrants, this right is subject to significant limitations. Specifically, we may only require the exercise of the Class B Warrants on or after the six-month anniversary of the date of issuance, and only if the per share closing price of our common stock on The Nasdaq Global Select Market exceeds $6.66, subject to certain adjustments, or the Mandatory Exercise Price, on each of the ten consecutive trading days prior to our notice of mandatory exercise. The Mandatory Exercise Price is three times higher than the exercise price of the Class B Warrants and substantially above our current trading price. Given current market conditions and our stock performance, the closing price of our common stock may never reach and maintain the Mandatory Exercise Price for the requisite ten-day period. Consequently, we may never be able to compel exercise of the Class B Warrants.

In addition, the Class A and Class B Warrants may be exercised on a cashless basis if there is no effective registration statement registering the shares underlying such warrants, in which case we would not receive any additional proceeds. Though we intend to maintain an effective registration statement for the underlying shares, we may not be able to do so. If the Class A and Class B Warrants are not exercised for cash, or only a portion of the Class A and Class B Warrants are exercised for cash, we would not receive anticipated warrant exercise proceeds which could materially and adversely affect our financial condition and ability to execute our business strategy.

***Currently, our common stock is listed on the Nasdaq Global Select Market. However, there may not be enough liquidity in that market to enable you to sell your shares of our common stock.***

Currently, our common stock is listed on the Nasdaq Global Select Market. If an active trading market for our shares is not sustained, you may not be able to sell your shares quickly or at the market price. We cannot predict the extent to which investor interest in us will lead to sustaining an active, liquid trading market. Further, an inactive market may also impair our ability to raise capital by selling shares of our common stock and may impair our ability to enter into strategic partnerships or acquire companies or products by using our shares of common stock as consideration.

***If securities or industry analysts do not publish or cease publishing research or reports about our business, or if they issue an adverse or misleading opinion regarding our stock, our stock price and trading volume could decline.***

The trading market for our common stock is and will continue to be influenced by the research and reports that industry or securities analysts publish about us, our business or the targeted protein degradation space. We do not have control over these analysts. There can be no assurance that existing analysts will continue to provide research coverage or that new analysts will begin to provide coverage. Although we have obtained analyst coverage, if any of the analysts who cover us were to issue an adverse or misleading opinion regarding us, our business model, our intellectual property or our stock performance, or if our preclinical studies and future clinical trials and results of operations fail to meet the expectations of any of these analysts, our stock price would likely decline. If one or more of these covering analysts were to cease coverage of us or fail to publish reports on us regularly, we could lose visibility in the financial markets, which in turn could cause a decline in our stock price or trading volume.

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***The price of our common stock may be volatile and fluctuate substantially, which could result in substantial losses for purchasers of our common stock.***

The trading price of shares of our common stock has been and may continue to be volatile and subject to wide fluctuations in response to various factors, some of which we cannot control. The stock market in general, and the market for smaller biopharmaceutical companies in particular, have experienced extreme volatility that has often been unrelated to the operating performance of particular companies. As a result of this volatility, you may not be able to sell your common stock at or above the price at which you acquired it. The market price for our common stock may be influenced by many factors, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the degree of success of competitive products or technologies or changes in standard of care regimens;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• results of preclinical studies and clinical trials of our product candidates or those of our competitors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the timing and progress of our clinical development activities and the timing of our release of data from our clinical trials;

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

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the recruitment or departure of key personnel;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the level of expenses related to any of our product candidates or clinical development programs and the value of the cash, cash equivalents, and marketable securities we hold;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the results of our efforts to discover, develop, acquire, or in-license additional technologies or product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• actual or anticipated changes in estimates as to financial results, development timelines, or recommendations by securities analysts;

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• changes in the structure of healthcare payment systems;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• market conditions in the pharmaceutical and biotechnology sectors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• effects of public health crises, pandemics and epidemics;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• general economic, industry, and market conditions, including those impacted by interest rates and tariffs; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the other factors described in this "Risk Factors" section.

If any of the foregoing factors were viewed as likely to have a negative impact on our business, prospects or operations or if our operating results fall below the expectations of investors or securities analysts, the price of our common stock could decline substantially. In the past, following periods of volatility in the market price of a company's securities, securities class-action litigation often has been instituted against that company. Litigation of this nature, if instituted against us, could cause us to incur substantial costs to defend these claims and divert management's attention and resources, which could seriously harm our business, financial condition, results of operations, and prospects. Further, our director and officer liability insurance cost may increase as a result of litigation of this nature and our insurance deductible may be significant before our insurers are required to provide any coverage to us.

***We have broad discretion in the use of the capital we have raised and may not use our capital effectively.***

Our management has broad discretion in the application of the net proceeds from our prior financings, including our initial and follow-on public offerings, and could spend the proceeds in ways that do not improve our results of operations or enhance the value of our common stock. The failure by our management to apply these funds effectively could result in financial losses that could have an adverse effect on our business, cause the price of our common stock to decline and delay the development of our product candidates. Pending their use, we may invest the net proceeds from our financing activities in a manner that does not produce income or that loses value.

***Our executive officers, directors, and principal stockholders will have the ability to control or significantly influence matters submitted to stockholders for approval.***

Our executive officers and directors, combined with our stockholders who have reported through filings made with the SEC that they own more than 5% of our outstanding common stock, in the aggregate, beneficially own a significant percentage of our shares. As a result, our executive officers and directors, combined with our greater than 5% stockholders, have the ability to control or significantly influence us through this ownership position. These stockholders, if acting together, will consequently continue to control matters submitted to our stockholders for approval, as well as our

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management and affairs. For example, these persons, if they choose to act together, would control the election of directors and approval of any merger, consolidation or sale of all or substantially all of our assets. This concentration of ownership control may:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• delay, defer, or prevent a change in control;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• entrench our management and the board of directors; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• impede a merger, consolidation, takeover, or other business combination involving us that other stockholders may desire.

***Anti-takeover provisions under our charter documents and Delaware law could delay or prevent a change of control, which could limit the market price of our common stock and may prevent or frustrate attempts by our stockholders to replace or remove our current management.***

Our amended and restated certificate of incorporation and amended and restated by-laws contain provisions that could delay or prevent a change of control of our company or changes in our board of directors that our stockholders might consider favorable. Some of these provisions include:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a board of directors divided into three classes serving staggered three-year terms, the result of which is that not all members of the board will be elected at one time;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a prohibition on stockholder action through written consent, the result of which is that all stockholder actions will have to be taken at a meeting of our stockholders;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a requirement that special meetings of stockholders be called only by the board of directors acting pursuant to a resolution approved by the affirmative vote of a majority of the directors then in office;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• advance notice requirements for stockholder proposals and nominations for election to our board of directors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a requirement that no member of our board of directors may be removed from office by our stockholders except for cause and, in addition to any other vote required by law, upon the approval of not less than two-thirds of all outstanding shares of our voting stock then entitled to vote in the election of directors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a requirement of approval of not less than two-thirds of all outstanding shares of our voting stock to amend any by-laws by stockholder action or to amend specific provisions of our certificate of incorporation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the authority of the board of directors to issue preferred stock on terms determined by the board of directors without stockholder approval and which preferred stock may include rights superior to the rights of the holders of common stock.

In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporate Law, which may prohibit certain business combinations with stockholders owning 15% or more of our outstanding voting stock. These anti-takeover provisions and other provisions in our amended and restated certificate of incorporation and amended and restated by-laws could make it more difficult for stockholders or potential acquirers to obtain control of our board of directors or initiate actions that are opposed by the then-current board of directors and could also delay or impede a merger, tender offer, or proxy contest involving our company. These provisions could also discourage proxy contests and make it more difficult for you and other stockholders to elect directors of your choosing or cause us to take other corporate actions you desire. Any delay or prevention of a change of control transaction or changes in our board of directors could cause the market price of our common stock to decline.

***We will continue to incur additional costs as a result of operating as a public company and our management will be required to devote substantial time to compliance initiatives and corporate governance practices.***

As a public company, we will continue to incur significant legal, accounting, and other expenses that we would not have to incur as a private company. The Sarbanes-Oxley Act of 2002, or Sarbanes-Oxley, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of The Nasdaq Stock Market LLC and other applicable securities rules and regulations impose various requirements on public companies, including establishment and maintenance of effective disclosure and financial controls and corporate governance practices. Our management and other personnel devote a substantial amount of time to these compliance initiatives. Moreover, these rules and regulations increase our legal and financial compliance and insurance costs and make some activities more time-consuming and costly. For example, these rules and regulations make it more difficult and more expensive for us to obtain director and officer liability insurance, which in turn could make it more difficult for us to attract and retain qualified members of our board of directors.

We continually evaluate these rules and regulations and cannot always predict or estimate the amount of additional costs we may incur or the timing of these costs. These rules and regulations are also often subject to varying interpretations, in

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many cases due to their lack of specificity and, as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices.

Pursuant to Section 404 of Sarbanes-Oxley, or Section 404, we are required to furnish a report by our management on our internal control over financial reporting. However, as a "smaller reporting company," we will not be required to include an attestation report on internal control over financial reporting issued by our independent registered public accounting firm until we are no longer a smaller reporting company. As of the end of our fiscal year ended December 31, 2025, we qualified as a "non-accelerated filer" as defined in the Securities Exchange Act of 1934, as amended, or the Exchange Act, and as a "smaller reporting company." Our compliance with Section 404 necessitates that we incur substantial accounting expense and expend significant management efforts.

We will need to continue to dedicate internal resources, potentially engage outside consultants, and adopt a detailed work plan to assess and document the adequacy of internal control over financial reporting, continue steps to improve control processes as appropriate, validate through testing that controls are functioning as documented and implement a continuous reporting and improvement process for internal control over financial reporting. Despite our efforts, there is a risk we will be able to conclude, within the prescribed timeframe or at all, that our internal control over financial reporting is effective as required by Section 404. Further, we cannot assure you that the measures we have taken in the past or will take in the future will prevent the occurrence of future material weaknesses or significant deficiencies in our internal control over financial reporting. If we identify one or more material weaknesses in the future, it could result in an adverse reaction in the financial markets and restrict our future access to the capital markets due to a loss of confidence in the reliability of our condensed consolidated financial statements.

***Our amended and restated by-laws designate specific courts as the exclusive forum for certain litigation that may be initiated by our stockholders, which could limit our stockholders' ability to obtain a favorable judicial forum for disputes with us.***

Pursuant to our amended and restated by-laws, unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware is the sole and exclusive forum for state law claims for (i) any derivative action or proceeding brought on our behalf; (ii) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers, or other employees to us or our stockholders; (iii) any action asserting a claim arising pursuant to any provision of the Delaware General Corporation Law or our amended and restated certificate of incorporation or amended and restated by-laws; (iv) any action to interpret, apply, enforce, or determine the validity of our amended and restated certificate of incorporation or amended and restated by-laws; or (v) any action asserting a claim governed by the internal affairs doctrine. We refer to this provision in our amended and restated by-laws as the Delaware Forum Provision. The Delaware Forum Provision will not apply to any causes of action arising under the Securities Act of 1933, as amended, the Securities Act, or the Exchange Act, as amended.

Our amended and restated by-laws further provide that unless we consent in writing to the selection of an alternative forum, the U.S. District Court for the District of Massachusetts shall be the sole and exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act, as our headquarters are located in Watertown, Massachusetts. We refer to this provision in our amended and restated by-laws as the Federal Forum Provision. In addition, our amended and restated by-laws provide that any person or entity purchasing or otherwise acquiring any interest in shares of our capital stock is deemed to have notice of and consented to the Delaware Forum Provision and the Federal Forum Provision.

The Delaware Forum Provision and the Federal Forum Provision in our amended and restated by-laws may impose additional litigation costs on stockholders in pursuing any such claims. Additionally, these forum selection clauses may limit our stockholders' ability to bring a claim in a judicial forum that they find favorable for disputes with us or our directors, officers or employees, and may discourage the filing of lawsuits against us and our directors, officers, and employees, even though an action, if successful, might benefit our stockholders. In addition, while the Delaware Supreme Court ruled in March 2020 that federal forum selection provisions purporting to require claims under the Securities Act be brought in federal court are "facially valid" under Delaware law, there is uncertainty as to whether other courts will enforce our Federal Forum Provision. If the Federal Forum Provision is found to be unenforceable, we may incur additional costs associated with resolving such matters. The Federal Forum Provision may also impose additional litigation costs on stockholders who assert that the provision is not enforceable or invalid. The Court of Chancery of the State of Delaware and the U.S. District Court for the District of Massachusetts may also reach different judgments or results than would other courts, including courts where a stockholder considering an action may be located or would otherwise choose to bring the action, and such judgments may be more or less favorable to us than our stockholders.

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

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

***Business disruptions, including due to natural disasters, global conflicts or political unrest, and unstable market conditions and downturns in economic and market conditions may have serious adverse consequences on our business, financial condition and stock price.***

Our operations and those of any CMOs, CROs and other contractors and consultants that we may engage could be impacted by earthquakes, power shortages, telecommunications failures, water shortages, floods, hurricanes, typhoons, fires, extreme weather conditions, medical epidemics and other natural or man-made disasters or business interruptions, for which we are predominantly self-insured. Our ability to obtain clinical supplies of our product candidates, or if approved, commercial supplies for any future approved products, could be disrupted if the operations of these suppliers are affected by a man-made or natural disaster or other business interruption.

Our results of operations could be adversely affected by general conditions in the global economy and in the global financial markets. For example, the global financial crisis caused extreme volatility and disruptions in the capital and credit markets. Similarly, the significant volatility associated with recent geopolitical tensions, including with China, and the global conflicts, such as those between Russia and Ukraine and Israel and Hamas, have caused significant instability and disruptions in the capital and credit markets. Sanctions imposed by the United States and other countries in response to such conflicts may also adversely impact the financial markets and the global economy, and any economic countermeasures by the affected countries or others could exacerbate market and economic instability. Global economic conditions continue to be volatile and uncertain in the United States and abroad. Our operations could be adversely affected by economic and political changes in the markets, including higher inflation rates, increasing interest rates, supply chain disruptions, recessions, trade restrictions, and economic embargoes imposed by the United States.

Changes in U.S. federal policy that affect the geopolitical landscape could give rise to circumstances outside our control that could have negative impacts on our business operations. For example, in 2025, the U.S. imposed blanket tariffs on many imports to the U.S. and significantly higher so-called reciprocal tariffs applicable to imports from many countries. Historically, tariffs have led to increased trade and political tensions, between not only the U.S. and China, but also between the U.S. and other countries. In response to tariffs, other countries have implemented retaliatory tariffs on U.S. goods. Political tensions as a result of trade policies could reduce trade volume, investment, technological exchange and other economic activities between major international economies, resulting in a material adverse effect on global economic conditions and the stability of global financial markets. Any changes in political, trade, regulatory, and economic conditions, including U.S. trade policies, could have a material adverse effect on our financial condition or results of operations. Until we know what policy changes are made, whether those policy changes are challenged and subsequently upheld by the court system and how those changes impact our business and the business of our competitors over the long term, we will not know if, overall, we will benefit from them or be negatively affected by them.

A severe or prolonged economic downturn could result in a variety of risks to our business, including weakened demand for our product candidates, and could also impact our ability to raise additional capital when needed on acceptable terms, if at all. Our general business strategy may be adversely affected by any economic downturn of this nature, volatile business environment or continued unpredictable and unstable market conditions. If the current equity and credit markets deteriorate, or do not improve, it may make any necessary debt or equity financing more difficult, costly and dilutive, or not available at all.

Failure to secure any necessary financing in a timely manner and on favorable terms could have an adverse effect on our growth strategy, financial performance, and stock price and could require us to delay, modify, or abandon clinical development plans. In addition, there is a risk that one or more of our current service providers, manufacturers, and other partners may not survive these difficult economic times, which could directly affect our ability to attain our operating goals on schedule and on budget.

Historically, securities class action litigation has often been brought against a company following a decline in the market price of its securities. This risk is especially relevant for us because biotechnology and pharmaceutical companies have experienced significant stock price volatility in recent years. If we were to be sued, it could result in substantial costs and a diversion of management's attention and resources, which could adversely affect our business prospects, financial condition, and results of operations.

***Adverse developments affecting the financial services industry, such as actual events or concerns involving liquidity, defaults, or non-performance by financial institutions or transactional counterparties, could adversely affect the Company's current and projected business operations and its financial condition and results of operations.***

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Adverse developments that affect financial institutions, such as events involving liquidity that are rumored or actual, have in the past and may in the future lead to market-wide liquidity problems. We periodically assess our banking and other relationships as we believe necessary or appropriate, including to ensure that we have appropriate diversification in these relationships. Nonetheless, our access to funding sources and other credit arrangements in amounts adequate to finance or capitalize our current and projected future business operations could be significantly impaired by factors that affect the Company, the financial institutions with which the Company has credit agreements or arrangements directly, or the financial services industry or economy in general. These factors could include, among others, events such as liquidity constraints or failures, the ability to perform obligations under various types of financial, credit or liquidity agreements or arrangements, disruptions or instability in the financial services industry or financial markets, or concerns or negative expectations about the prospects for companies in the financial services industry. These factors could involve financial institutions or financial services industry companies with which the Company has financial or business relationships, but could also include factors involving financial markets or the financial services industry generally.

**Item 1B. Unresolved Staff Comments.** 

Not applicable.

**Item 1C. Cybersecurity.**

**Cyber Risk Management and Strategy** 

We have implemented and maintain an ongoing cybersecurity risk management program, under the oversight of the audit committee of the board of directors, that is focused on identifying, assessing and mitigating cyber risk. We engage with multiple third-party vendors who provide a variety of services ranging from ongoing security advisory services to security monitoring and response management. In addition, we also have a process to assess and review the cybersecurity practices of third-party vendors and service providers, including through the use of vendor questionnaires and contractual security requirements, as appropriate. In addition to these efforts, we have implemented an ongoing enterprise risk management program that includes processes designed to identify, assess, and address cybersecurity risks. Our cybersecurity efforts are informed by industry standards and include periodic, targeted risk assessments supported by cybersecurity technologies, including third-party security solutions and monitoring tools, designed to monitor, identify, and address cybersecurity risks.

Additionally, as a public company, we are subject to various regulatory requirements around our internal controls, including our controls around our information technology systems and their impact on our financial statements or systems. We have engaged a third party vendor to advise us on our compliance with these requirements, including around our controls related to cybersecurity, and strategies to mitigate related risk. If we were to identify any control deficiencies that represent cybersecurity risks, those would be reported to the Chief Financial Officer and the audit committee, together with plans for corrective action, as appropriate.

Although risks from cybersecurity threats to date have not materially affected, and we do not believe they are reasonably likely to materially affect, us, our business strategy, results of operations or financial condition, we do, from time to time, experience threats and security incidents relating to our, and our third party vendors', information systems. For more information, please see the section entitled "Risk Factors" in this Annual Report on Form 10-K.

**Governance Related to Cybersecurity Risks**

Our cyber risk management program and related operations and processes are managed by our Director of Information Technology, in consultation with the legal and human resources teams. The Director of Information Technology has primary responsibility for day-to-day management of our cyber risk management program, including monitoring for cybersecurity risks. Currently, the Director of Information Technology role is held by an individual who has over 19 years of cybersecurity, information technology, and systems engineering experience. The Director of Information Technology reports to the Chief People Officer.

The Director of Information Technology meets with the Chief People Officer periodically to monitor and review the outcomes of our cybersecurity risk management processes and to discuss and address matters related to cybersecurity risk management strategy. The Director of Information Technology, working with the General Counsel and Chief People Officer, provides periodic reports on cybersecurity risks to the audit committee, which is responsible for reviewing and overseeing the Company's risk management processes, including cybersecurity risks. The Chief Financial Officer, Chief People Officer and General Counsel and/or other senior members of the legal team, participate in audit committee meetings, which are generally led by the Chief Financial Officer, as well as meetings of the full board of directors.

Our enterprise risk management process is overseen by our General Counsel and Chief Financial Officer. In collecting information on enterprise risk, cyber security is specifically included as a risk category, and the results of our enterprise risk assessment processes, including risks related to cybersecurity, are also discussed with the audit committee and among senior management on a periodic basis. Further, in accordance with the committee's charter, the chair of the audit

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committee provides periodic updates on committee activities to the full board of directors, which may include discussion of any cyber risks.

**Item 2. Properties.** 

We currently lease approximately 111,611 square feet of office and laboratory space in Watertown, Massachusetts under a lease that expires in 2032. We sublease approximately 33,447 square feet of our office and laboratory space in Watertown, Massachusetts, under a sublease arrangement that expires in 2029. We believe that our facilities are sufficient to meet our current needs for the foreseeable future and that suitable additional space will be available as and when needed.

**Item 3. Legal Proceedings.**

We are not currently a party to any material legal proceedings. From time to time, we may be subject to various legal proceedings and claims that arise in the ordinary course of our business activities. Regardless of the outcome, litigation can have a material adverse effect on us because of defense and settlement costs, diversion of management resources, and other factors.

**Item 4. Mine Safety Disclosures.**

Not applicable.

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**PART II**

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

**Market information**

Our common stock has been publicly traded on the Nasdaq Global Select Market under the symbol "CCCC" since October 2, 2020. Prior to that time, there was no public market for our common stock.

**Holders**

As of December 31, 2025, there were approximately 100 holders of record of our common stock. This number does not include beneficial owners whose shares are held by nominees in street name.

**Dividends**

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

**Securities authorized for issuance under equity compensation plans**

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

**Recent sales of unregistered securities**

None.

**Purchases of equity securities by the issuer or affiliated purchasers**

Neither we nor any affiliated purchaser or anyone acting on our behalf or on behalf of an affiliated purchaser made any purchases of shares of our common stock during the year ended December 31, 2025.

**Item 6. [Reserved]**

Not applicable.

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

*The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our consolidated financial statements and the related notes to those statements included elsewhere in this Annual Report on Form 10-K. In addition to historical financial information, the following discussion and analysis contains forward-looking statements that involve risks, uncertainties, and assumptions. Some of the numbers included herein have been rounded for the convenience of presentation. Our actual results may differ materially from those anticipated in these forward-looking statements as a result of many factors, including those discussed under Item 1A, Risk Factors, in this Annual Report on Form 10-K.*

**Overview**

We are a clinical-stage biopharmaceutical company dedicated to delivering on the promise of targeted protein degradation, or TPD, science to create a new generation of small-molecule medicines that transform patients' lives. Leveraging our proprietary TORPEDO platform, we efficiently design and optimize small molecule protein degraders that are highly active against their desired targets by harnessing the body's natural process for destroying unwanted proteins. Our strategy is to develop degraders that modulate clinically validated disease pathways with best-in-class or first-in-class potential to address significant unmet patient needs. To date, our degraders have demonstrated oral bioavailability and catalytic activity, and we have also leveraged our capability to design compounds that are brain penetrant.

Our clinical pipeline has two oncology degraders, cemsidomide, an IKZF1 and IKZF3 degrader, for multiple myeloma, or MM, and CFT8919, an EGFR L858R degrader for non-small-cell lung cancer, or NSCLC. Our discovery strategy is focused on inflammation, neuroinflammation and neurodegeneration across validated pathways with potential to be first-in-class and where there is a strong degrader rationale.

Our most advanced product candidate, cemsidomide, is an orally bioavailable MonoDAC degrader targeting of protein targets called IKZF1 and IKZF3. Cemsidomide is currently in clinical development for multiple myeloma, or MM in a Phase 2 trial in combination with dexamethasone and a Phase 1b trial exploring cemsidomide in combination with elranatamab. Pfizer will supply elranatamab for the Phase 1b trial, pursuant to the Pfizer Agreement. With a strong mechanistic rationale and well-defined biology of targeting IKZF1 and IKZF3, as well as potential best-in-class profile,

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cemsidomide has the opportunity to address a significant unmet need across multiple lines of therapy. In August 2021, the United States Food and Drug Administration, or FDA, granted orphan drug designation to cemsidomide for the treatment of MM. In September 2025 at the International Myeloma Society Annual Meeting and in December 2024, we shared data evaluating cemsidomide in combination with dexamethasone in MM that demonstrated a well-tolerated profile with compelling anti-myeloma activity.

Our other clinical oncology product candidate is CFT8919, an orally bioavailable, allosteric, mutant-selective BiDAC degrader of EGFR with an L858R mutation in NSCLC. CFT8919 is currently in clinical development in Greater China conducted by our collaboration partner, Betta Pharma. In preclinical studies, CFT8919 demonstrated equipotent anti-proliferation activity against the major EGFR-inhibitor resistance mutations, including L858R-C797S, L858R-T790M, and L858R-T790M-C797S compared to L858R single mutation in Ba/F3 cell models in vitro. In May 2023, we entered into an exclusive license and collaboration agreement with Betta Pharma for the development and commercialization of CFT8919 in Greater China, including mainland China, Hong Kong SAR, Macau SAR and Taiwan, with us retaining rights to develop and commercialize CFT8919 in the rest of the world. In November 2024, Betta Pharma initiated a Phase 1 clinical trial of CFT8919 in EGFR L858R NSCLC in Greater China and is continuing to progress the trial. Data generated from this trial will inform our ex-China clinical development strategy.

Beyond these initial product candidates, we are further diversifying our pipeline by developing new degraders for our own proprietary pipeline and for the pipeline we are developing in collaboration with Merck KGaA and Roche. We have engineered degraders that have successfully achieved blood-brain barrier penetration in preclinical studies, which is a key step in developing medicines with the potential to treat brain metastases in inflammation, neuroinflammation and neurodegeneration diseases, where degraders may be advantageous.

**Recent Developments**

In February, 2026, first patient was dosed in the Phase 2 MOMENTUM trial evaluating cemsidomide in combination with dexamethasone.

In October 2025, we entered into a supply agreement with Pfizer, pursuant to which Pfizer will supply elranatamab (ELREXFIO<sup>®</sup>), a B-cell maturation antigen CD3 targeted bispecific antibody, for the Phase 1b trial of cemsidomide in combination with elranatamab.

In October 2025, we raised $125 million in gross proceeds through an underwritten offering with the potential to earn up to $225 million in additional proceeds if the outstanding warrants are exercised.

**Components of Operating Results** 

***Revenues***

To date, we have not generated any revenue from product sales and do not expect to generate any revenue from the sale of products for the foreseeable future. Our revenues to date have been generated through research collaboration and license agreements. We recognize revenue over the expected performance period under each agreement. We expect that our revenue for the next several years will be derived primarily from our current collaboration agreements and any additional collaborations that we may enter into in the future. To date, we have not received any royalties under any of our existing collaboration agreements.

For a description of our collaboration agreements with Merck KGaA, Merck Sharp & Dohme, LLC, or Merck, Betta Pharma, Roche, and Biogen, please see Note 8, *Collaboration and license agreements*, to the consolidated financial statements in this Annual Report on Form 10-K.

***Research and development expenses***

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• salaries, benefits, and other related costs, including stock-based compensation expense, for personnel engaged in research and development functions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• expenses incurred under agreements with third parties, including contract research organizations and other third parties that conduct research, preclinical, and clinical activities on our behalf as well as third parties that manufacture our product candidates for use in our preclinical and clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• costs of outside consultants, including their fees, and related travel expenses;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the costs of laboratory supplies and acquiring materials for preclinical studies and clinical trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• facility-related expenses, which include direct depreciation costs of equipment and allocated expenses for rent and maintenance of facilities and other operating costs; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• third-party licensing fees.

We expense research and development costs as incurred. Costs for external development activities are recognized based on an evaluation of the progress to completion of specific tasks using information provided to us by our vendors. Payments for these activities are based on the terms of the individual agreements, which may differ from the pattern of costs incurred, and are reflected in our consolidated financial statements as prepaid or accrued research and development expenses. Nonrefundable advance payments for goods or services to be received in the future for use in research and development activities are recorded as prepaid expenses and expensed as the related goods are delivered or the services are performed.

We expect that our research and development expenses will continue to increase substantially in connection with our planned preclinical and clinical development activities.

***General and administrative expenses***

General and administrative expenses consist primarily of salaries and other related costs, including stock-based compensation, for personnel in our executive, finance, legal, business development, and administrative functions. General and administrative expenses also include legal fees relating to corporate matters; professional fees for accounting, auditing, tax and consulting services; insurance costs; travel expenses; and facility-related expenses, which include direct depreciation costs and allocated expenses for rent and maintenance of facilities and other operating costs.

We expect that our general and administrative expenses will continue to increase in the future to support increased research and development activities. These increases will likely include higher costs related to the hiring of additional personnel; fees to outside consultants, lawyers, and accountants; and investor and public relations.

***Impairment of long-lived assets expense***

Impairment of long-lived assets expense consists of amounts that are not recoverable when the carrying amount of an asset exceeds the fair value of the asset, when changes in certain circumstances occur.

***Restructuring***

Restructuring expenses consist of one-time costs incurred under a reduction plan to align with the needs of the business. These costs include employee severance, benefits and related termination costs.

***Other income (expense), net***

Other income (expense), net primarily consists of the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• interest expense and amortization of our long-term debt;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• loss on extinguishment of debt; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• interest and other income earned on our cash, cash equivalents, and marketable securities and accretion of discount on marketable securities.

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**Results of operations** 

***Comparison of years ended December 31, 2025 and 2024***

*Revenue* 

Revenue from our collaboration and license agreements consisted of the following (in thousands):

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Revenue from collaboration agreements: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Merck KGaA Agreement | $18482 | $7304 |
| &nbsp;&nbsp;&nbsp;&nbsp;Merck Agreement | 6020 | 3979 |
| &nbsp;&nbsp;&nbsp;&nbsp;Betta Agreement | 649 | 3415 |
| &nbsp;&nbsp;&nbsp;&nbsp;Roche Agreement | 8796 | 3988 |
| &nbsp;&nbsp;&nbsp;&nbsp;Biogen Agreement | 2000 | 16898 |
| Total revenue from collaboration agreements | $35947 | $35584 |

---

The $0.4 million increase in revenue from our collaboration and license agreement in the year ended December 31, 2025 as compared to the year ended December 31, 2024 is primarily driven by:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;•a $11.2 million increase in revenue recognized from the Merck KGaA collaboration reflecting the prioritization of one KRAS project;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $4.8 million increase in revenue related to the Roche collaboration as the two active programs in the collaboration have progressed to the lead series identification achievement phase in 2025, and a milestone was earned for each program; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $2.0 million increase in revenue recognized under our former exclusive license and collaboration agreement with Merck upon receipt of notice of termination in September 2025.

These increases were partially offset by:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $14.9 million decrease in revenue recognized under the Biogen collaboration, as the active research conducted as part of the collaboration concluded in March 2024, and a total of $16.0 million of milestones were achieved and recognized in full during 2024, compared to one $2.0 million milestone achieved and recognized in full during 2025; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $2.9 million decrease in revenue recognized under the Betta Pharma collaboration, as a result higher program activity in the prior year.

*Research and Development Expenses* 

The following table summarizes our research and development expenses (in thousands):

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| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Research and development expenses: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Personnel expenses | $35187 | $36752 |
| &nbsp;&nbsp;&nbsp;&nbsp;Preclinical and development expenses | 25226 | 29364 |
| &nbsp;&nbsp;&nbsp;&nbsp;Clinical expenses | 19544 | 20808 |
| &nbsp;&nbsp;&nbsp;&nbsp;Facilities and supplies | 14289 | 12349 |
| &nbsp;&nbsp;&nbsp;&nbsp;Professional fees | 5375 | 6731 |
| &nbsp;&nbsp;&nbsp;&nbsp;Intellectual property and other expenses | 4619 | 4633 |
| Total research and development expenses | $104240 | $110637 |

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The $6.4 million decrease in research and development expense in the year ended December 31, 2025 from the year ended December 31, 2024 is primarily driven by:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $4.1 million decrease in preclinical development and discovery expenses as a result of higher drug development costs in 2024 related to start up costs associated with Betta Pharma's Phase 1 trial of CFT8919;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $1.6 million decrease in personnel expenses related to lower stock-based compensation expense;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $1.4 million decrease in professional fees; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $1.3 million decrease in clinical expenses as a result of our completion of the Phase 1 clinical trial of CFT1946.

These decreases were partially offset by a $1.9 million increase in facilities and supplies due to the end of our sublease agreement in June 2025.

*General and Administrative Expenses* 

The following table summarizes our general and administrative expenses (in thousands):

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| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| General and administrative expenses: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Personnel expenses | $25337 | $31278 |
| &nbsp;&nbsp;&nbsp;&nbsp;Professional fees | 6350 | 6659 |
| &nbsp;&nbsp;&nbsp;&nbsp;Facilities and supplies | 3274 | 2751 |
| &nbsp;&nbsp;&nbsp;&nbsp;Other expenses | 1235 | 1436 |
| Total general and administrative expenses | $36196 | $42124 |

---

The $5.9 million decrease in general and administrative expense in the year ended December 31, 2025, as compared to the year ended December 31, 2024, was primarily driven by a $5.9 million decrease in personnel expenses related to lower stock-based compensation expense.

*Impairment of long-lived assets expense*

The $10.7 million increase in impairment of long-lived assets expense for the year ended December 31, 2025, as compared to the year ended December 31, 2024, is a result of our entry into a new sublease agreement in September 2025, which commenced in February 2026 and will result in net negative cash flows over the term of the sublease.

*Restructuring expenses*

The $2.4 million decrease of restructuring expenses in the year ended December 31, 2025, as compared to the year ended December 31, 2024, is driven by the restructuring activities that occurred and were completed in 2024.

*Other Income (Expense)*

The $4.1 million decrease in other income (expense) for the year ended December 31, 2025 as compared to the year ended December 31, 2024 was driven by lower interest income from reduced invested balances and lower interest rates in 2025.

**Liquidity and capital resources** 

***Sources of liquidity***

Since inception, we have incurred significant operating losses. We expect to incur significant expenses and operating losses for the foreseeable future as we continue the development of our programs. We do not currently have any approved products and have never generated any revenue from product sales. To date, we have financed our operations primarily through the sale of preferred stock, public offerings of our common stock, and payments from collaboration partners. As of December 31, 2025, we had cash, cash equivalents and marketable securities of approximately $297.1 million.

In November 2021, we filed an automatically effective registration statement on Form S-3, or the Registration Statement, with the SEC which registers the offering, issuance, and sale of an unspecified amount of common stock, preferred stock, debt securities, warrants, and/or units of any combination thereof. We simultaneously entered into a sales agreement with Cowen and Company, LLC (now TD Securities (USA) LLC), as sales agent, to provide for the issuance and sale by us of up to $200.0 million of common stock from time to time in "at-the-market" offerings under the Registration Statement and related prospectus filed with the Registration Statement, or the 2021 ATM Program. Under this Registration Statement, the Company sold a total of 15,318,264 shares of its common stock at an average price of $5.54 per share for proceeds, net of

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commissions and fees, of $82.3 million. For the year ended December 31, 2025, 4,132,122 shares of common stock, for net proceeds of $24.4 million, settled under the 2021 ATM Program.

In connection with the execution of the Betta Pharma License Agreement, we entered into a stock purchase agreement dated May 29, 2023, or the Betta Stock Purchase Agreement, with Betta Pharma and an affiliate of Betta Pharma, Betta Investment (Hong Kong) Limited, or Betta Investment, pursuant to which Betta Investment agreed to purchase 5,567,928 shares of the Company's common stock for an aggregate purchase price of approximately $25.0 million, or $4.49 per share, which represented a 25% premium over the 60-trading-day volume weighted average closing price as of two trading days prior to the effective date of the Betta Stock Purchase Agreement. The $25.0 million of proceeds that we received were recorded as $20.0 million for the issuance of shares, with the remaining $5.0 million of premium paid on the share price recorded as consideration for revenue under the Betta Pharma License Agreement. The Betta Stock Purchase Agreement has certain restrictions customary to agreements of this nature. Closing under the Betta Stock Purchase Agreement occurred in January 2024 (see Note 8).

In October 2024, the Company filed a registration statement on Form S-3, or the 2024 Registration Statement, with the SEC that became effective on November 13, 2024 and registered the offering, issuance and sale of an unspecified amount of common stock, preferred stock, debt securities, warrants and/or units of any combination thereof. Simultaneously, the Company entered into a sales agreement with TD Securities (USA) LLC, as sales agent, to provide for the issuance and sale by the Company of up to $200.0 million of common stock from time to time in "at-the-market" offerings under the 2024 Registration Statement and related prospectus filed with the 2024 Registration Statement, or the 2024 ATM Program. For the year ended December 31, 2025, a total of 3,769,483 shares of the Company's common stock at an average purchase price of $2.55 had been sold through the 2024 ATM Program, resulting in net proceeds of $9.4 million. No sales were made in 2024 under the 2024 ATM Program. In October 2025, the Company terminated the sales agreement prospectus related to the 2024 ATM Program.

In October 2025, we entered into an underwriting agreement, or the Underwriting Agreement, with Jefferies LLC, TD Securities (USA) LLC and Evercore Group LLC, or collectively, the Underwriters, related to the 2025 Offering, of (i) 21,895,000 shares, or the Shares, of the Company's common stock, par value $0.0001 per share, or the Common Stock; (ii) in lieu of Common Stock to certain investors, Pre-Funded Warrants to purchase an aggregate of 28,713,500 shares of Common Stock, or the Pre-Funded Warrants; (iii) accompanying Class A Warrants to purchase an aggregate of 50,608,500 shares of Common Stock (or pre-funded warrants in lieu thereof), or the Class A Warrants, and together with the Class B Warrants (as defined below), the Class A and Class B Warrants; and (iv) accompanying Class B Warrants to purchase an aggregate of 50,608,500 shares of Common Stock (or pre-funded warrants in lieu thereof), or the Class B Warrants, and together with the Pre-Funded Warrants and the Class A Warrants, the Warrants. Each Share was offered and sold together with accompanying Class A and Class B Warrants each exercisable for one share of Common Stock at a combined offering price of $2.47 per Share and accompanying Class A and Class B Warrants, and each Pre-Funded Warrant was offered and sold together with accompanying Class A and Class B Warrants at a combined offering price of $2.4699 per Pre-Funded Warrant and accompanying Class A and Class B Warrants. We received net proceeds from the 2025 Offering, after deducting the underwriting discount and commissions and estimated offering expenses, of approximately $116.9 million. If all Warrants are exercised, the aggregate net proceeds to us from the 2025 Offering, after deducting underwriting discounts and commissions and estimated offering expenses, are expected to be $341.7 million.

In November 2025, the Company filed a registration statement on Form S-3, or the 2025 Registration Statement, with the SEC that became effective on December 10, 2025 and registered the offering, issuance and sale of an unspecified amount of common stock, preferred stock, debt securities, warrants and/or units of any combination thereof. Simultaneously, the Company entered into a sales agreement with TD Securities (USA) LLC, as sales agent, to provide for the issuance and sale by the Company of up to $125.0 million of common stock from time to time in "at-the-market" offerings under the 2025 Registration Statement and related prospectus filed with the 2025 Registration Statement, or the 2025 ATM Program. No sales have been made under the 2025 ATM program for the year ended December 31, 2025 (See Note 9).

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***Cash flows***

The following table summarizes our sources and uses of cash for the period presented (in thousands):

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| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Net change in cash, cash equivalents and restricted cash: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Net cash used in operating activities | $(98694) | $(65157) |
| &nbsp;&nbsp;&nbsp;&nbsp;Net cash used in investing activities | (8601) | (51270) |
| &nbsp;&nbsp;&nbsp;&nbsp;Net cash provided by financing activities | 126399 | 45336 |
| Net change in cash, cash equivalents and restricted cash | $19104 | $(71091) |

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*Operating activities* 

Net cash used in operating activities was $98.7 million for the year ended December 31, 2025 and was driven primarily by:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our net loss of $105.0 million;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $18.8 million decrease in deferred revenue;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $6.0 million decrease in accrued expenses and other current liabilities; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $5.8 million decrease in the operating lease liability.

These amounts were partially offset by $38.2 million of non-cash expense related to stock compensation expense, depreciation and amortization, and reduction in carrying amount of our right-of-use asset;

Net cash used in operating activities for the year ended December 31, 2024 was driven primarily by:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our net loss of $105.3 million;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $5.2 million decrease in the operating lease liability;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $4.3 million increase in prepaid expenses and current and long-term assets; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $1.3 million decrease in accrued expenses and other liabilities.

These amounts were partially offset by:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $37.9 million of non-cash expense related to stock compensation expense, depreciation, and reduction in carrying amount of our right-of-use asset;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• a $9.9 million increase in deferred revenue due to the recognition of revenue under our collaboration agreements; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• an $8.7 million decrease in accounts receivable.

*Investing activities* 

The $8.6 million of net cash used in investing activities for the year ended December 31, 2025 was attributable to $8.0 million for the purchases of marketable securities, net of sales and proceeds from maturities.

The $51.3 million of net cash used in investing activities for the year ended December 31, 2024 was attributable to $51.1 million for the purchases of marketable securities, net sales and proceeds from maturities.

*Financing activities* 

The $126.4 million of net cash provided by financing activities for the year ended December 31, 2025 was primarily driven by:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $116.9 million of net proceeds from our underwritten offering; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $9.3 million of net proceeds from our at-the-market offering.

The $45.3 million of net cash provided by financing activities for the year ended December 31, 2024 was primarily driven by:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $24.4 million of net proceeds from our at-the-market offering; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• $20.0 million in proceeds for the closing of the Betta Stock Purchase Agreement.

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***Funding requirements***

Since our inception, we have incurred significant operating losses, and we expect to continue to incur significant expenses and increasing operating losses for the foreseeable future as we advance the preclinical and clinical development of our product candidates. In addition, we expect to continue to incur costs associated with operating as a public company.

Specifically, we anticipate that our expenses will increase in the future, if and as we:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• continue our ongoing first-in-human Phase 1/2 trials and advance our product candidates into later stage trials;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• advance additional product candidates into preclinical and clinical development;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• continue to invest in our proprietary TORPEDO platform;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• advance, expand, maintain, and protect our intellectual property portfolio;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• manage staffing needs to meet the changing needs of our business as we advance additional product candidates or continue to develop existing product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• seek marketing approvals for any product candidates that successfully complete clinical trials; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• ultimately establish a sales, marketing, and distribution infrastructure and scale up external manufacturing capabilities to commercialize any products for which we may obtain marketing approval.

Because of the numerous risks and uncertainties associated with the development and commercialization of our product candidates, we are unable to estimate the amounts of increased capital and operating costs associated with our current and anticipated preclinical and clinical development. Our future capital requirements will depend on many factors, including:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the progress, costs, and results of ongoing and planned first-in-human clinical trials for our lead product candidates and any future clinical development of those lead product candidates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the scope, progress, costs, and results of preclinical and clinical development for our other product candidates and development programs;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the number and development requirements of other product candidates that we pursue;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the progress and success of our existing and any future collaborations with third party partners, including whether or not we receive additional research support or milestone payments from our collaboration partners upon the achievement of milestones;

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

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our willingness and ability to establish additional collaboration arrangements with other biotechnology or pharmaceutical companies on favorable terms, if at all, for the development or commercialization of current or additional future product candidates;

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the revenue, if any, received from commercial sales of our product candidates for which we receive marketing approval.

As a result of the anticipated expenditures described above, we will need to obtain substantial additional financing to support our continuing operations and pursue our long-term business plan. Until such time, if ever, that we can generate substantial revenue from product sales, we expect to finance our cash needs through a combination of equity offerings, debt offerings, collaborations, strategic alliances and marketing, distribution or licensing arrangements. Although we may receive potential future milestone and royalty payments under our collaborations with Merck KGaA, Betta Pharma, Roche, and Biogen, we do not have any committed external source of funds as of December 31, 2025. Adequate additional funds may not be available to us on acceptable terms, or at all. If we are unable to raise capital when needed or on attractive terms, we may be required to delay, limit, reduce or terminate our research, product development or future commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves.

If we raise additional capital through the sale of equity securities, each investor's ownership interest will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect your rights as a common

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stockholder. Preferred equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as making acquisitions or capital expenditures or declaring dividends.

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

***Contractual obligations***

The following is a summary of our significant contractual obligations as of December 31, 2025 (in thousands):

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| | **Total** | **Less than<br>1 Year** | **1 to 3<br>Years** | **4 to 5<br>Years** | **More than<br>5 Years** |
| &nbsp;&nbsp;&nbsp;&nbsp;Operating lease commitments <br>(see Note 6) | $71125 | $9366 | $21008 | $25198 | $15553 |

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We enter into contracts in the normal course of business with third-party CROs for clinical trials, preclinical studies, manufacturing and other services and products for operating purposes. These contracts generally provide for termination following a certain period after notice and therefore we believe that our non-cancelable obligations under these agreements are not material, and they are not included in the table above. We have not included milestone or royalty payments or other contractual payment obligations in the table above if the timing and amount of such obligations are unknown or uncertain.

**Critical accounting estimates** 

This management's discussion and analysis of financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with generally accepted accounting principles in the United States, or the United States GAAP. The preparation of our consolidated financial statements and related disclosures requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues, costs and expenses, and the disclosure of contingent assets and liabilities in our consolidated financial statements. We base our estimates on historical experience, known trends and events and various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. We evaluate our estimates and assumptions on an ongoing basis. Our actual results may differ from these estimates under different assumptions or conditions.

While our significant accounting policies are described in more detail in Note 2, *Summary of significant accounting policies*, to our consolidated financial statements in this Annual Report on Form 10-K, we believe that the following accounting policies are those most critical to the judgments and estimates used in the preparation of our consolidated financial statements.

***Revenues from contracts***

We account for our revenue in accordance with Accounting Standards Codification, or ASC, 606, *Revenue from Contracts with Customers*, or ASC 606. Under ASC 606, an entity recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration that the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, the entity performs the following five steps at inception of the agreement or upon material modification of the agreement: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price, including variable consideration, if any; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation.

We consider the pattern of satisfaction of the performance obligations under step (v) above to be a critical accounting estimate. More specifically, the determination of the level of achievement of research and development service performance obligations, whose pattern of satisfaction is measured using costs incurred to date as compared to total costs incurred and expected to be incurred in the future is driven by a critical accounting estimate.

In estimating the costs expected to be incurred in the future, management uses its most recent budget and long-range plan, adjusted for any pertinent information. While this is our best estimate as of the reporting period, costs expected to be incurred in the future require management judgment as the scope and timing of research and development activities may change significantly over time. We may adjust the scope of our research and development activities based on several factors, such as additional work needed to support advancement of a product candidate or a change in the number of patients in trials. Further, research and development services may no longer be within the scope of a collaboration agreement, as has been the case with certain of our programs. The timing of when research and development costs are expected to be incurred may change as a result of external factors, such as delays caused by manufacturing or supply chain, or difficulty in enrolling patients; or internal factors, such as prioritization of programs. Our estimate of the scope and

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timing of research and development services performed relative to the actual scope and timing may have a significant impact on revenue recognition.

***Prepaid and accrued research and development expenses***

As part of preparing our consolidated financial statements, we are required to estimate our accrued research and development expenses. This process involves reviewing quotations and contracts, identifying services that have been performed on our behalf and estimating the level of service performed and the associated cost incurred for the service when we have not yet been invoiced or otherwise notified of the actual cost. We make estimates of the accrued expenses as of each balance sheet date in our consolidated financial statements based on facts and circumstances known to us at that time. In addition, there may be instances in which payments made to our vendors will exceed the level of services provided and result in a prepayment of the expense, in which case such amounts are reflected as prepaid expenses and other current assets. In accruing service fees, we estimate the time period over which services will be performed and the level of effort to be expended in each period. If the actual timing of the performance of services or the level of effort varies from our estimate, we adjust the accrual or the amount of prepaid expenses accordingly. Although we do not expect our estimates to be materially different from amounts actually incurred, our understanding of the status and timing of services performed relative to the actual status and timing of services performed may vary and could have a significant impact on reported amounts.

Non-refundable advance payments for goods or services to be received in the future for use in research and development activities are deferred and capitalized in prepaid expenses and other current assets. The capitalized amounts are expensed as the related goods are delivered or the services are performed.

***Operating leases (incremental borrowing rate)***

We account for leases in accordance with ASC Topic 842, *Leases*, or ASC 842. Under ASC 842, at inception or upon modification of a lease arrangement, we may be required to remeasure our lease liabilities and the corresponding right-of-use assets. The lease liability is measured by calculating the present value of lease payments under the lease arrangement using the incremental borrowing rate. Incremental borrowing rate is the rate of interest that we would have to pay to borrow, on a collateralized basis, an amount equal to the lease payments over a similar term equal to the lease term in a similar economic environment.

Since the incremental borrowing rates implicit in our leases are not readily determinable, we use the estimated incremental borrowing rates based on the information available at commencement date in determining the discount rate used to calculate the present value of lease payments. As we have no recent external borrowings, the incremental borrowing rates are determined using information on indicative borrowing rates that would be available to us based on the value and borrowing term provided by financial institutions, adjusted for company and market specific factors. This determination requires management judgment, including when determining peer groups, our own risk profile, and when adjusting for company and market specific factors.

Although we do not expect our estimates of the incremental borrowing rates to generate material differences within a reasonable range of sensitivities, judgment is involved in selecting an appropriate rate, and the rate selected for our leases will have an impact on the value of the lease liability and corresponding right-of-use asset in the consolidated balance sheets.

***Stock options***

We account for all stock-based awards granted to employees and non-employees as stock-based compensation expense at fair value. Our stock-based payments include stock options, restricted stock units, and grants of common stock, including common stock subject to vesting. The measurement date for awards is the date of grant, and stock-based compensation costs are recognized as expense over the requisite service period, which is generally the vesting period, on a straight-line basis. Stock-based compensation expense is classified in the consolidated statements of operations and comprehensive loss based on the function to which the related services are provided. We recognize stock-based compensation expense for the portion of awards that have vested. Forfeitures are recorded as they occur. The fair value of each stock option grant is estimated on the date of grant using the Black-Scholes option pricing model. The Black-Scholes option pricing model includes various assumptions, including the expected term of the award, the expected volatility and the expected risk-free interest rate over the expected term of the award, expected dividend payments, and the fair value of the common stock underlying the stock-based award.

We consider the expected volatility to be a critical accounting estimate. As we do not have sufficient trading history, we use the average historical volatility of a representative group of publicly traded biopharmaceutical companies, including our own, to calculate the expected volatility for use in the Black-Scholes option pricing model. This assumption reflects our

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best estimate, but it involves inherent uncertainties based on market conditions generally outside our control. As a result, if a different volatility had been used, stock-based compensation cost could have been materially impacted.

**Item 7A. Quantitative and Qualitative Disclosures About Market Risk.** 

We are exposed to market risks in the ordinary course of our business. These risks primarily include interest rate sensitivities. Our interest-earning assets consist of cash, cash equivalents, and marketable securities. Our interest income is sensitive to changes in the general level of interest rates, primarily United States interest rates. As of December 31, 2025, we had marketable securities of $222.5 million. Our marketable securities are short-term in nature with a weighted-average maturity date of 0.6 years. As such, while these interest-earning instruments carry a degree of interest rate risk, historical fluctuations in interest income have not been significant for us.

**Item 8. Financial Statements and Supplementary Data.** 

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

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

None.

**Item 9A. Controls and Procedures.** 

*Evaluation of Disclosure Controls and Procedures*

Our management, with the participation of our principal executive officer and our principal financial officer, evaluated, as of the end of the period covered by this Annual Report on Form 10-K, the effectiveness of our disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act. The term "disclosure controls and procedures," as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act 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, including its principal executive and principal financial officers, or persons performing similar functions, 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, 2025, our principal executive officer and principal financial officer concluded that our disclosure controls and procedures as of such date are effective at the reasonable assurance level.

*Management's Annual Report on Internal Control over Financial Reporting*

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

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with United States GAAP, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors; and

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

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

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Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2025. In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission, or COSO, in its 2013 Internal Control – Integrated Framework. Based on our assessment, our management has concluded that, as of December 31, 2025, our internal control over financial reporting is effective based on those criteria.

*Changes in Internal Control over Financial Reporting*

We continuously seek to improve the efficiency and effectiveness of our internal controls. This results in refinements to processes throughout the company. There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the year ended December 31, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

*Inherent Limitations on Effectiveness of Controls*

The effectiveness of any system of internal control over financial reporting, including ours, is subject to inherent limitations, including the exercise of judgment in designing, implementing, operating, and evaluating the controls and procedures, and the inability to eliminate misconduct completely. Accordingly, any system of internal control over financial reporting, including ours, no matter how well designed and operated, can only provide reasonable, not absolute assurances. In addition, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. We intend to continue to monitor and upgrade our internal controls as necessary or appropriate for our business, but there can be no assurance that such improvements will be sufficient to provide us with effective internal control over financial reporting. See "Risk Factors—*We will continue to incur additional costs as a result of operating as a public company and our management will be required to devote substantial time to new compliance initiatives and corporate governance practices.*"

**Item 9B. Other Information.**

Rule 10b5-1 Trading Plans

During the fiscal year ended December 31, 2025, none of our directors and officers (as defined in Rule 16a-1(f) under the Exchange Act) adopted, modified or terminated a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement," as those terms are defined in Item 408(a) of Regulation S-K.

**Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.**

None.

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**PART III** 

**Item 10. Directors, Executive Officers and Corporate Governance.**

The information required by this Item 10 will be included in our definitive proxy statement to be filed with the Securities and Exchange Commission, or SEC, with respect to our 2026 Annual Meeting of Stockholders within 120 days after the end of the year covered by this Annual Report on Form 10-K and is incorporated herein by reference.

**Item 11. Executive Compensation.**

The information required by this Item 11 will be included in our definitive proxy statement to be filed with the SEC within 120 days after the end of the year covered by this Annual Report on Form 10-K with respect to our 2026 Annual Meeting of Stockholders and is incorporated herein by reference.

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

The information required by this Item 12 will be included in our definitive proxy statement to be filed with the SEC within 120 days after the end of the year covered by this Annual Report on Form 10-K with respect to our 2026 Annual Meeting of Stockholders and is incorporated herein by reference.

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

The information required by this Item 13 will be included in our definitive proxy statement to be filed with the SEC within 120 days after the end of the year covered by this Annual Report on Form 10-K with respect to our 2026 Annual Meeting of Stockholders and is incorporated herein by reference.

**Item 14. Principal Accounting Fees and Services.** 

The information required by this Item 14 will be included in our definitive proxy statement to be filed with the SEC within 120 days after the end of the year covered by this Annual Report on Form 10-K with respect to our 2026 Annual Meeting of Stockholders and is incorporated herein by reference.

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**PART IV**

**Item 15. Exhibits, Financial Statement Schedules.** 

*1. Financial Statements*

For a list of the financial statements included herein, see *Index to the Consolidated Financial Statements* on page F-1 of this Annual Report on Form 10-K, incorporated into this Item by reference.

*2. Financial Statement Schedules*

Financial statement schedules have been omitted because they are either not required or not applicable or the information is included in the consolidated financial statements or the notes thereto.

*3. Exhibits*

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| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **Exhibit<br>Number** | **Description of Exhibit** | **Form** | **File<br>Number** | **Date of<br>Filing** | **Exhibit<br>Number** | **Filed<br>Herewith** |
| 3.1 | <u>[Fifth Amended and Restated Certificate of Incorporation of the Registrant](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex33.htm)</u> | 8-K | 001–39567 | 10/06/2020 | 3.3 |  |
| 3.2 | <u>[Certificate of Amendment to the Fifth Amended and Restated Certificate of Incorporation of the Registrant](https://www.sec.gov/ix?doc=/Archives/edgar/data/0001662579/000162828023013738/cccc-20230427.htm)</u> | DEF14A | 001–39567 | 04/28/2023 | A |  |
| 3.3 | <u>[Certificate of Amendment to the Fifth Amended and Restated Certificate of Incorporation of the Registrant](https://www.sec.gov/Archives/edgar/data/1662579/000162828025032155/c4t-certificateofamendme.htm)</u> | 8-K | 001–39567 | 06/18/2025 | 3.1 |  |
| 3.4 | <u>[Form of Second Amended and Restated Bylaws of the Registrant](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex35.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 3.5 |  |
| 4.1 | <u>[Form of Specimen Common Stock Certificate](http://www.sec.gov/Archives/edgar/data/1662579/000119312520255106/d772024dex43.htm)</u> | S-1/A | 333–248719 | 09/28/2020 | 4.3 |  |
| 4.2 | <u>[F](https://www.sec.gov/Archives/edgar/data/1662579/000119312525241591/d19436dex41.htm)[orm of Pre-Funded Warrant](https://www.sec.gov/Archives/edgar/data/1662579/000119312525241591/d19436dex41.htm)</u> | 8-K | 001–39567 | 10/16/2025 | 4.1 |  |
| 4.3 | <u>[Form of](https://www.sec.gov/Archives/edgar/data/1662579/000119312525241591/d19436dex42.htm)[Class A](https://www.sec.gov/Archives/edgar/data/1662579/000119312525241591/d19436dex42.htm)[Warrant](https://www.sec.gov/Archives/edgar/data/1662579/000119312525241591/d19436dex42.htm)</u> | 8-K | 001–39567 | 10/16/2025 | 4.2 |  |
| 4.4 | <u>[Form of Class](https://www.sec.gov/Archives/edgar/data/1662579/000119312525241591/d19436dex43.htm)[B](https://www.sec.gov/Archives/edgar/data/1662579/000119312525241591/d19436dex43.htm)[Warrant](https://www.sec.gov/Archives/edgar/data/1662579/000119312525241591/d19436dex43.htm)</u> | 8-K | 001–39567 | 10/16/2025 | 4.3 |  |
| 4.5 | <u>[Description of Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934, as amended](exhibit45-descriptionofsec.htm)</u> |  |  |  |  | X |
| 10.1# | <u>[2015 Stock Option and Grant Plan, as amended and forms of award agreements thereunder](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex101.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 10.1 |  |
| 10.2# | <u>[2020 Stock Option and Incentive Plan and forms of award agreements thereunder](https://www.sec.gov/Archives/edgar/data/1662579/000162828023004711/exhibit102.htm)</u> | 10-K | 001-39567 | 02/23/2023 | 10.2 |  |
| 10.3# | <u>[Form of Non-Qualified Stock Option Agreement for Inducement Grants](https://www.sec.gov/Archives/edgar/data/1662579/000162828024006144/c4t-formofnsoagreementin.htm)</u> | 10-K | 001-39567 | 02/22/2024 | 10.19 |  |
| 10.4# | <u>[2020 Employee Stock Purchase Plan](http://www.sec.gov/Archives/edgar/data/1662579/000119312520255106/d772024dex103.htm)</u> | S-1/A | 333–248719 | 09/28/2020 | 10.3 |  |
| 10.5# | <u>[Senior Executive Cash Incentive Bonus Plan](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex104.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 10.4 |  |
| 10.6# | <u>[Form of Director Indemnification Agreement](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex105.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 10.5 |  |
| 10.7# | <u>[Form of Officer Indemnification Agreement](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex106.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 10.6 |  |
| 10.8# | <u>[Form of Executive Employment Agreement](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex107.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 10.7 |  |
| 10.9# | <u>[Employment Agreement between the Registrant and Andrew Hirsch, dated September 6, 2020](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex108.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 10.8 |  |
| 10.10† | <u>[Collaborati](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex1010.htm)[ve](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex1010.htm)[Research and License Agreement between the Registrant and Biogen MA, Inc., dated December 28, 2018](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex1010.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 10.10 |  |

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| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **Exhibit<br>Number** | **Description of Exhibit** | **Form** | **File<br>Number** | **Date of<br>Filing** | **Exhibit<br>Number** | **Filed<br>Herewith** |
| 10.11† | <u>[Amendment No. 1 to Collaborative Research and License Agreement between the Registrant and Biogen MA, Inc., dated February 25, 2020](http://www.sec.gov/Archives/edgar/data/1662579/000156459021012531/cccc-ex1011_218.htm)</u> | 10-K | 001-39567 | 03/11/2021 | 10.11 |  |
| 10.12† | <u>[Amended and Restated License Agreement among the Registrant, F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., dated December 20, 2018](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex1011.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 10.11 |  |
| 10.13† | <u>[First Amendment to the Amended and Restated License Agreement among the Registrant, F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., dated November 12, 2020](http://www.sec.gov/Archives/edgar/data/1662579/000156459021012531/cccc-ex1013_217.htm)</u> | 10-K | 001-39567 | 03/11/2021 | 10.13 |  |
| 10.14 | <u>[Lease by 480 Arsenal Group LLC to the Registrant, dated July 5, 2017, as amended](http://www.sec.gov/Archives/edgar/data/0001662579/000119312520243234/d772024dex1014.htm)</u> | S-1 | 333–248719 | 09/10/2020 | 10.14 |  |
| 10.15 | <u>[Third Amendment to Lease, dated November 24, 2021, by and between C4 Therapeutics, Inc. and Columbia Massachusetts Arsenal Office Properties, LLC](http://www.sec.gov/Archives/edgar/data/1662579/000156459021058797/cccc-ex101_7.htm)</u> | 8-K | 001-39567 | 11/30/2021 | 10.1 |  |
| 10.16† | <u>[License and Collaboration Agreement, dated May 29, 2023, by and between C4 Therapeutics, Inc. and Betta Pharmaceuticals Co., Ltd.](https://www.sec.gov/Archives/edgar/data/1662579/000162828023020025/redacted-projectgeoffreyxc.htm)</u> | 8-K | 001-39567 | 05/30/2023 | 10.1 |  |
| 10.17† | <u>[Research Collaboration and License Agreement dated March 1, 2024, by and between C4 Therapeutics, Inc., and Merck KGaA, Darmstadt, Germany](https://www.sec.gov/Archives/edgar/data/1662579/000162828024021368/a240301_c4t-mkdgcollabor.htm)</u> | 10-Q | 001-39567 | 05/08/2024 | 10.1 |  |
| 10.18# | <u>[Form of Performance-Accelerated Restricted Stock Unit Award Agreement](parsuagreementfebruary20.htm)</u> |  |  |  |  | X |
| 19.1 | <u>[Company Policy on Insider Trading and Disclosure, Special Trading Procedures for Insiders, and Rule 10b5-1 Trading Plan Policy](https://www.sec.gov/Archives/edgar/data/1662579/000162828025008433/statementofcompanypolicy.htm)</u> | 10-K | 001-39567 | 02/27/2025 | 19.0 |  |
| 21.1 | <u>[Subsidiaries of the Registrant](exhibit2112025.htm)</u> |  |  |  |  | X |
| 23.1 | <u>[Consent of KPMG LLP, Independent Registered Public Accounting Firm](exhibit2312025.htm)</u> |  |  |  |  | X |
| 31.1 | <u>[Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](cccc-20251231x10kex311.htm)</u> |  |  |  |  | X |
| 31.2 | <u>[Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002](cccc-20251231x10kex312.htm)</u> |  |  |  |  | X |
| 32.1\* | <u>[Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](cccc-20251231x10kex321.htm)</u> |  |  |  |  | X |
| 32.2\* | <u>[Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002](cccc-20251231x10kex322.htm)</u> |  |  |  |  | X |
| 97 | <u>[Executive Compensation](https://www.sec.gov/Archives/edgar/data/1662579/000162828024006144/ex97-executivecompensati.htm)[Recovery](https://www.sec.gov/Archives/edgar/data/1662579/000162828024006144/ex97-executivecompensati.htm)[Policy](https://www.sec.gov/Archives/edgar/data/1662579/000162828024006144/ex97-executivecompensati.htm)</u> | 10-K | 001-39567 | 02/22/2024 | 97 |  |

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| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **Exhibit<br>Number** | **Description of Exhibit** | **Form** | **File<br>Number** | **Date of<br>Filing** | **Exhibit<br>Number** | **Filed<br>Herewith** |
| 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 (formatted as Inline XBRL document and contained in Exhibit 101) |  |  |  |  |  |

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_____________________________________

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|:---|:---|
| # | Indicates a management contract or any compensatory plan, contract or arrangement. |
| † | Portions of this exhibit (indicated by asterisks) will be omitted in accordance with the rules of the Securities and Exchange Commission. |
| \* | Exhibits 32.1 and 32.2 are being furnished and shall not be deemed to be "filed" for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, nor shall such exhibit be deemed to be incorporated by reference in any registration statement or other document filed under the Securities Act, or the Exchange Act, except as otherwise stated in such filing. |

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**Item 16. Form 10-K Summary**

Not applicable.

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**SIGNATURES**

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized**.**

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| | | |
|:---|:---|:---|
| | C4 Therapeutics, Inc. | C4 Therapeutics, Inc. |
| Date: February 26, 2026 | By: | /s/ Andrew J. Hirsch |
|  |  | **Andrew J. Hirsch** |
|  |  | **President and Chief Executive Officer** |

---

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Report has been signed below by the following persons on behalf of the Registrant in the capacities and on the dates indicated.

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| | | |
|:---|:---|:---|
| **Name** | **Title** | **Date** |
| /s/ Andrew J. Hirsch | President, Chief Executive Officer, and Director | February 26, 2026 |
| **Andrew J. Hirsch** | (Principal Executive Officer) |  |
| /s/ Kendra R. Adams | Chief Financial Officer and Treasurer | February 26, 2026 |
| **Kendra R. Adams** | (Principal Financial Officer)  |  |
| /s/ Mark Mossler | Chief Accounting Officer | February 26, 2026 |
| **Mark Mossler** | (Principal Accounting Officer)  |  |
| /s/ Ronald Cooper | Chairman and Director | February 26, 2026 |
| **Ronald Cooper** |  |  |
| /s/ Kenneth C. Anderson, M.D. | Director | February 26, 2026 |
| **Kenneth C. Anderson, M.D.** |  |  |
| /s/ Laura Bessen, M.D. | Director | February 26, 2026 |
| **Laura Bessen, M.D.** |  |  |
| /s/ Stephen Fawell, Ph.D. | Director | February 26, 2026 |
| **Stephen Fawell, Ph.D.** |  |  |
| /s/ Donna Grogan, M.D. | Director | February 26, 2026 |
| **Donna Grogan, M.D.** |  |  |
| /s/ Utpal Koppikar | Director | February 26, 2026 |
| **Utpal Koppikar** |  |  |
| /s/ Stephen L. Hoerter | Director | February 26, 2026 |
| **Stephen L. Hoerter** |  |  |
| /s/ Owen Hughes | Director | February 26, 2026 |
| **Owen Hughes** |  |  |

---

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**INDEX TO CONSOLIDATED FINANCIAL STATEMENTS** 

---

| | |
|:---|:---|
| <u>[Report of Independent Registered Public Accounting Firm](#i5011ba653e214f14a9bed9a7ac77aa67_127)</u> | F-[2](#i5011ba653e214f14a9bed9a7ac77aa67_127) |
| <u>[Consolidated Balance Sheets](#i5011ba653e214f14a9bed9a7ac77aa67_130)</u> | F-[4](#i5011ba653e214f14a9bed9a7ac77aa67_130) |
| <u>[Consolidated Statements of Operations and Comprehensive Loss](#i5011ba653e214f14a9bed9a7ac77aa67_133)</u> | F-[5](#i5011ba653e214f14a9bed9a7ac77aa67_133) |
| <u>[Consolidated Statements of Stockholders' Equity](#i5011ba653e214f14a9bed9a7ac77aa67_136)</u> | F-[6](#i5011ba653e214f14a9bed9a7ac77aa67_136) |
| <u>[Consolidated Statements of Cash Flows](#i5011ba653e214f14a9bed9a7ac77aa67_139)</u> | F-[7](#i5011ba653e214f14a9bed9a7ac77aa67_139) |
| <u>[Notes to Consolidated Financial Statements](#i5011ba653e214f14a9bed9a7ac77aa67_142)</u> | F-[8](#i5011ba653e214f14a9bed9a7ac77aa67_142) |

---

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**Report of Independent Registered Public Accounting Firm**

To the Stockholders and Board of Directors

C4 Therapeutics, Inc.:

*Opinion on the Consolidated Financial Statements*

We have audited the accompanying consolidated balance sheets of C4 Therapeutics, Inc. and subsidiary (the Company) as of December 31, 2025 and December 31, 2024, the related consolidated statements of operations and comprehensive loss, stockholders' equity, and cash flows for each of the years in the two-year period ended December 31, 2025, and the related notes (collectively, 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, 2025 and December 31, 2024, and the results of its operations and its cash flows for each of the years in the two-year period ended December 31, 2025, in conformity with U.S. generally accepted accounting principles.

*Basis for Opinion*

These consolidated financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these 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 respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the 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 Matter*

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: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of a critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

*Revenue recognition for certain research and development services*

As discussed in Notes 2 and 8 to the consolidated financial statements, the Company is party to collaboration agreements which have various performance obligations, including the promise to perform research and development (R&D) services for or on behalf of the customer. For certain collaboration agreements, the Company recognizes revenue for the transaction price allocated to each of the R&D performance obligations as the R&D services are provided, using an input method, according to costs incurred as related to the research and development target and the total costs incurred and expected to be incurred in the future to satisfy that individual performance obligation. Amounts received by the Company prior to satisfying the revenue recognition criteria are recorded as deferred revenue. For the year ended December 31, 2025, the Company recognized revenue from collaboration agreements of $35.9 million, a portion of which related to R&D services performed. In addition, as of December 31, 2025, a portion of the Company's current and net of current deferred revenue related to R&D services to be performed.

We identified the evaluation of revenue recognition for certain R&D services as a critical audit matter. Specifically, evaluating the estimate of costs expected to be incurred in satisfying certain R&D performance obligations, including the assessment of the nature of the R&D services to be performed, involved especially challenging auditor judgment.

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

The following are the primary procedures we performed to address this critical audit matter. For a selection of R&D performance obligations, we evaluated the estimate of total R&D service costs expected to be incurred by:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• inspecting the underlying contract with the customer to gain an understanding of the nature of the R&D services to be performed

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• comparing the Company's prior period estimates to actual R&D service costs incurred to assess the Company's ability to estimate accurately

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• inspecting underlying documentation and third-party evidence and comparing it to management's estimate of total R&D service costs incurred and expected to be incurred

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• inquiring of R&D personnel of the Company to evaluate factors related to the nature of the R&D services to be performed and their impact on the total R&D service costs to be incurred, including progress to date and the estimate of remaining R&D service costs.

![KPMG.jpg](cccc-20251231_g8.jpg)

We have served as the Company's auditor since 2016.

Boston, Massachusetts

February 26, 2026

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Consolidated Balance Sheets** 

**(in thousands, except share and per share amounts)**

---

| | | |
|:---|:---|:---|
| | **December 31,** | **December 31,** |
| | **2025** | **2024** |
| **Assets** |  |  |
| Current assets: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Cash and cash equivalents | $74603 | $55499 |
| &nbsp;&nbsp;&nbsp;&nbsp;Marketable securities, current | 173934 | 189405 |
| &nbsp;&nbsp;&nbsp;&nbsp;Accounts receivable | 2401 | 3102 |
| &nbsp;&nbsp;&nbsp;&nbsp;Prepaid expenses and other current assets | 7172 | 9761 |
| Total current assets | 258110 | 257767 |
| Marketable securities, non-current | 48563 | 22359 |
| Property and equipment, net | 4744 | 5842 |
| Right-of-use asset | 40532 | 57536 |
| Restricted cash | 3443 | 3443 |
| Other assets | 3683 | 2655 |
| Total assets | $359075 | $349602 |
| **Liabilities and stockholders' equity** |  |  |
| Current liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Accounts payable | $858 | $1328 |
| &nbsp;&nbsp;&nbsp;&nbsp;Accrued expenses and other current liabilities | 13314 | 19363 |
| &nbsp;&nbsp;&nbsp;&nbsp;Deferred revenue, current | 12493 | 18712 |
| &nbsp;&nbsp;&nbsp;&nbsp;Operating lease liability, current | 6367 | 5774 |
| Total current liabilities | 33032 | 45177 |
| Deferred revenue, net of current | 15841 | 28457 |
| Operating lease liability, net of current | 53615 | 59982 |
| Total liabilities | 102488 | 133616 |
| Commitments and contingencies (See Note 6 and Note 9) |  |  |
| Stockholders' equity: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Preferred stock, par value of $0.0001 per share; 10,000,000 shares authorized, and no shares issued or outstanding as of December 31, 2025 and 2024, respectively |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Common stock, par value of $0.0001 per share; 300,000,000 and 150,000,000 shares authorized as of December 31, 2025 and December 31, 2024, and 96,914,418 and 70,625,899 shares issued and outstanding as of December 31, 2025 and 2024, respectively | 9 | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;Additional paid-in capital | 995221 | 849625 |
| &nbsp;&nbsp;&nbsp;&nbsp;Accumulated other comprehensive income | 50 | 53 |
| &nbsp;&nbsp;&nbsp;&nbsp;Accumulated deficit | (738693) | (633699) |
| Total stockholders' equity | 256587 | 215986 |
| Total liabilities and stockholders' equity | $359075 | $349602 |

---

The accompanying notes are an integral part of these consolidated financial statements.

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Consolidated Statements of Operations and Comprehensive Loss**

**(in thousands, except share and per share amounts)**

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Revenue from collaboration agreements | $35947 | $35584 |
| Operating expenses: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Research and development | 104240 | 110637 |
| &nbsp;&nbsp;&nbsp;&nbsp;General and administrative | 36196 | 42124 |
| &nbsp;&nbsp;&nbsp;&nbsp;Impairment loss on right-of-use asset | 10733 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Restructuring |  | 2437 |
| Total operating expenses | 151169 | 155198 |
| Loss from operations | (115222) | (119614) |
| Other income (expense), net |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Interest and other income, net | 10349 | 14429 |
| Total other income, net | 10349 | 14429 |
| Loss before income taxes | (104873) | (105185) |
| &nbsp;&nbsp;&nbsp;&nbsp;Income tax expense | (121) | (131) |
| Net loss | $(104994) | $(105316) |
| Net loss per share - basic and diluted | $(1.27) | $(1.52) |
| Weighted-average number of shares - basic and diluted | 82894459 | 69372993 |
| Other Comprehensive income (loss): |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Unrealized (loss) gain on marketable securities | (3) | 180 |
| Comprehensive loss | $(104997) | $(105136) |

---

The accompanying notes are an integral part of these consolidated financial statements.

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Consolidated Statements of Stockholders' Equity**

**(in thousands, except share amounts)**

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| | **Common Stock** | **Common Stock** | **Additional<br>Paid-In<br>Capital** | **Accumulated<br>Other<br>Comprehensive<br>Income (Loss)** | **Accumulated<br>Deficit** | **Total<br>Stockholders'<br>Equity** |
| | **Shares** | **Amount** | **Additional<br>Paid-In<br>Capital** | **Accumulated<br>Other<br>Comprehensive<br>Income (Loss)** | **Accumulated<br>Deficit** | **Total<br>Stockholders'<br>Equity** |
| Balance as of December 31, 2023 | 60467188 | $6 | $774618 | $(127) | $(528383) | $246114 |
| &nbsp;&nbsp;&nbsp;&nbsp;Issuance of common stock pursuant to the Betta Pharma Stock Purchase Agreement | 5567928 | 1 | 19999 |  |  | 20000 |
| &nbsp;&nbsp;&nbsp;&nbsp;Issuance of common stock pursuant to the at-the-market equity program, net | 4132122 |  | 24370 |  |  | 24370 |
| &nbsp;&nbsp;&nbsp;&nbsp;Exercise of stock options and release of stock units | 149818 |  | 778 |  |  | 778 |
| &nbsp;&nbsp;&nbsp;&nbsp;Issuance of common stock upon vesting of restricted stock units, net of shares repurchased for tax withholding | 176819 |  | (194) |  |  | (194) |
| &nbsp;&nbsp;&nbsp;&nbsp;Issuance of common stock under the 2020 ESPP | 110895 |  | 382 |  |  | 382 |
| &nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation |  |  | 29662 |  |  | 29662 |
| &nbsp;&nbsp;&nbsp;&nbsp;Unrealized gain on marketable securities |  |  |  | 180 |  | 180 |
| &nbsp;&nbsp;&nbsp;&nbsp;Net loss |  |  |  |  | (105316) | (105316) |
| &nbsp;&nbsp;&nbsp;&nbsp;Other | 21129 |  | 10 |  |  | 10 |
| Balance as of December 31, 2024 | 70625899 | $7 | $849625 | $53 | $(633699) | $215986 |
| &nbsp;&nbsp;&nbsp;&nbsp;Issuance of common stock pursuant to the underwritten offering, net | 21895000 | 2 | 116867 |  |  | 116869 |
| &nbsp;&nbsp;&nbsp;&nbsp;Issuance of common stock pursuant to the at-the-market equity program, net | 3769483 |  | 9340 |  |  | 9340 |
| &nbsp;&nbsp;&nbsp;&nbsp;Exercise of stock options and release of stock units | 50000 |  | 107 |  |  | 107 |
| &nbsp;&nbsp;&nbsp;&nbsp;Issuance of common stock upon vesting of restricted stock units, net of shares repurchased for tax withholding | 349766 |  | (193) |  |  | (193) |
| &nbsp;&nbsp;&nbsp;&nbsp;Issuance of common stock under the 2020 ESPP | 170703 |  | 273 |  |  | 273 |
| &nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation |  |  | 19099 |  |  | 19099 |
| &nbsp;&nbsp;&nbsp;&nbsp;Unrealized gain on marketable securities |  |  |  | (3) |  | (3) |
| &nbsp;&nbsp;&nbsp;&nbsp;Net loss |  |  |  |  | (104994) | (104994) |
| &nbsp;&nbsp;&nbsp;&nbsp;Other | 53567 |  | 103 |  |  | 103 |
| Balance as of December 31, 2025 | 96914418 | $9 | $995221 | $50 | $(738693) | $256587 |

---

The accompanying notes are an integral part of these consolidated financial statements.

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Consolidated Statements of Cash Flows**

**(in thousands)**

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Cash flows used in operating activities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Net loss | $(104994) | $(105316) |
| &nbsp;&nbsp;&nbsp;&nbsp;Adjustments to reconcile net loss to cash used in operating activities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation expense | 19099 | 29662 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Impairment of right-of-use asset | 10733 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Depreciation and amortization | 1959 | 1818 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reduction in carrying amount of right-of-use asset | 6434 | 6421 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accretion of premium on marketable securities | (2742) | (5396) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other | 99 | 6 |
| &nbsp;&nbsp;&nbsp;&nbsp;Changes in operating assets and liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts receivable | 701 | 8697 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Prepaid expenses and other current and long-term assets | 1144 | (4328) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts payable | (468) | (119) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accrued expenses and other current liabilities | (6049) | (1267) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Operating lease liability | (5774) | (5219) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deferred revenue | (18836) | 9884 |
| Net cash used in operating activities | (98694) | (65157) |
| Cash flows provided by investing activities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Proceeds from maturities of marketable securities | 219080 | 233231 |
| &nbsp;&nbsp;&nbsp;&nbsp;Purchase of marketable securities | (227074) | (284321) |
| &nbsp;&nbsp;&nbsp;&nbsp;Purchases of property and equipment | (607) | (180) |
| Net cash used in investing activities | (8601) | (51270) |
| Cash flows provided by financing activities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Proceeds from underwritten offering, net of issuance costs paid of $8.1 million | 116870 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Proceeds from issuance of common stock pursuant to the at-the-market equity program, net | 9341 | 24370 |
| &nbsp;&nbsp;&nbsp;Proceeds from issuance of common stock pursuant to the Betta Pharma Stock Purchase Agreement |  | 20000 |
| &nbsp;&nbsp;&nbsp;&nbsp;Proceeds from exercises of stock options | 107 | 778 |
| &nbsp;&nbsp;&nbsp;&nbsp;Payments for repurchase of common stock for tax withholding | (193) | (194) |
| &nbsp;&nbsp;&nbsp;&nbsp;Other | 274 | 382 |
| Net cash provided by financing activities | 126399 | 45336 |
| Net change in cash, cash equivalents and restricted cash | 19104 | (71091) |
| Cash, cash equivalents and restricted cash at beginning of period | 58942 | 130033 |
| Cash, cash equivalents and restricted cash at end of period | $78046 | $58942 |
| Reconciliation of cash, cash equivalents and restricted cash: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Cash, cash equivalents and restricted cash at end of year | $78046 | $58942 |
| &nbsp;&nbsp;&nbsp;&nbsp;Less: restricted cash | (3443) | (3443) |
| &nbsp;&nbsp;&nbsp;&nbsp;Cash and cash equivalents at end of the year | $74603 | $55499 |

---

**Years Ended December 31,**

The accompanying notes are an integral part of these consolidated financial statements.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements**

**Note 1. Nature of the business**

We are a clinical-stage biopharmaceutical company dedicated to delivering on the promise of TPD science to create a new generation of small-molecule medicines that transform patients' lives. By leveraging our proprietary TORPEDO platform, we have the capability to efficiently design and optimize small molecule protein degraders that are highly active against their desired targets by harnessing the body's natural process for destroying unwanted proteins. To date, our platform has produced several novel, oral, highly catalytic and brain penetrant degraders that have demonstrated robust target degradation, several of which are progressing through clinical development and have the potential to overcome drug resistance often seen with inhibitors and improve patient outcomes.

Our clinical pipeline is comprised of two oncology programs which our research efforts are focused on inflammation, neuroinflammation, and neurodegeneration. Additionally, our partnership strategy allows us to further expand our reach in both oncology and non-oncology indications.

The Company was incorporated in Delaware on October 7, 2015 and has its principal office in Watertown, Massachusetts.

***Liquidity and capital resources***

Since its inception, the Company's primary activities have been focused on performing research and development activities, building the Company's intellectual property, recruiting personnel, and raising capital to support these activities. To date, the Company has funded its operations primarily with proceeds received from the sales of redeemable convertible preferred stock, public offerings of the Company's common stock, equity issuances, through its collaboration agreements, and debt financing.

The Company has incurred recurring losses since its inception, including net losses of $105.0 million and $105.3 million for the years ended December 31, 2025 and 2024, respectively. In addition, as of December 31, 2025, the Company had an accumulated deficit of $738.7 million. To date, the Company has not generated any revenue from product sales as none of its product candidates has been approved for commercialization. The Company expects to continue to generate operating losses for the foreseeable future.

The Company expects that its cash, cash equivalents, and marketable securities of $297.1 million as of December 31, 2025 will be sufficient to fund its operations for at least the next twelve months from the date of issuance of these consolidated financial statements. Accordingly, the consolidated financial statements have been prepared on a basis that assumes the Company will continue as a going concern and contemplates the realization of assets and satisfaction of liabilities and commitments in the ordinary course of business.

***Risks and uncertainties***

The Company is subject to risks common to other life science companies in the early development stage including, but not limited to, uncertainty of ability to raise additional financing, product development and commercialization, development by its competitors of new technological innovations, dependence on key personnel, market acceptance of products, lack of marketing and sales history, product liability, protection of proprietary technology and intellectual property, and compliance with the Food and Drug Administration, or the FDA, and other government regulations. If the Company does not successfully advance its programs into and through human clinical trials and commercialize any of its product candidates either directly or through collaborations with other companies, the Company may be unable to produce product revenue or achieve profitability. There can be no assurance that the Company's research and development efforts will be successful, adequate protection for the Company's intellectual property will be obtained, any products developed will obtain necessary government regulatory approval, or any approved products will be commercially viable. Even if the Company's product development efforts are successful, it is uncertain when, if ever, the Company will generate significant revenue from product sales. The Company operates in an environment of rapid change in technology and substantial competition from pharmaceutical and biotechnology companies.

**Note 2. Summary of significant accounting policies**

***Basis of presentation***

The Company has prepared the accompanying consolidated financial statements in conformity with generally accepted accounting principles in the United States of America, or U.S. GAAP. Any reference in these notes to applicable guidance is meant to refer to the authoritative U.S. GAAP as found in the Accounting Standards Codification, or ASC, and Accounting Standards Update, or ASU, of the Financial Accounting Standards Board, or FASB.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

***Principles of consolidation***

The Company's consolidated financial statements include the accounts of C4 Therapeutics, Inc. and its wholly owned subsidiary, C4T Securities Corporation, a Massachusetts securities corporation. All significant intercompany balances and transactions have been eliminated in consolidation.

***Use of estimates***

The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. The Company bases its estimates and assumptions on historical experience when available and on various factors that it believes to be reasonable under the circumstances. This process may result in actual results differing materially from those estimated amounts used in the preparation of the consolidated financial statements if these results differ from historical experience or other assumptions do not turn out to be substantially accurate, even if such assumptions are reasonable when made. Areas where management uses subjective judgment include, but are not limited to, amounts and timing of revenues recognized under the Company's research and development collaboration arrangements, prepaid and accrued research and development expense, estimates of the useful lives of long-lived assets, assessments of the impairment of long-lived assets, measurement of right-of-use assets and lease liabilities, incremental borrowing rate used in the measurement of lease liability, and valuation and recognition of share-based compensation expense. The Company assesses estimates on an ongoing basis, and bases its estimates on historical experience, known trends and various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results could materially differ from those estimates.

***Segments***

Operating segments are defined as components of an enterprise for which separate and discrete information is available for evaluation by the chief operating decision-maker in deciding how to allocate resources and assess performance. The Company has one operating segment. The Company's chief operating decision maker, its Chief Executive Officer, manages the Company's operations on a consolidated basis for the purpose of allocating resources. All of the Company's long-lived assets are held in the United States.

***Cash equivalents***

The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. The Company's cash equivalents are measured at fair value on a recurring basis.

***Restricted cash***

Restricted cash consists of cash placed in a separate restricted bank account as required under the terms of the Company's lease agreement for its Watertown, Massachusetts facilities, as further described within Note 6, *Leases*.

***Marketable securities***

The Company classifies marketable securities with a remaining maturity of greater than three months at the date of purchase as available-for-sale. Marketable securities with a remaining maturity date greater than one year are classified as non-current assets. Available-for-sale securities are carried at fair value with the unrealized gains and losses included in accumulated other comprehensive (loss) income as a component of stockholders' equity until realized. Any premium or discount arising at purchase is amortized and/or accreted to interest income and/or expense over the life of the instrument. Realized gains and losses are determined using the specific identification method and are included in other income (expense).

***Concentrations of credit risk***

Financial instruments that potentially subject the Company to significant concentration of credit risk consist primarily of cash, cash equivalents, marketable securities, and restricted cash. The Company may maintain deposits in financial institutions in excess of government insured limits. The Company believes that it is not exposed to significant credit risk as its deposits are held at financial institutions that management believes to be of high credit quality, and the Company has not experienced any losses on these deposits. Additionally, the Company has established guidelines relative to credit ratings and maturities intended to safeguard principal balances and maintain liquidity. The Company maintains its funds in accordance with its investment policy, which defines allowable investments, specifies credit quality standards and is designed to limit credit exposure to any single issuer.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

***Fair value of financial instruments***

ASC Topic 820, *Fair Value Measurement*, or ASC 820, establishes a fair value hierarchy for instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the Company's own assumptions (unobservable inputs). Observable inputs are those that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company's assumptions about the inputs that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. ASC 820 identifies fair value as the exchange price or exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As a basis for considering market participant assumptions in fair value measurements, ASC 820 establishes a three-tier value hierarchy that distinguishes between the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Level 1—Observable inputs that reflect quoted market prices in active markets for identical assets or liabilities in active markets.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Level 2—Inputs other than Level 1 inputs that are either directly or indirectly observable in the marketplace.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Level 3—Unobservable inputs, which are supported by little or no market activity, and may be developed using estimates of assumptions developed by the Company, which reflect those that a market participant may use.

To the extent the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair values requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized as Level 3. A financial instrument's level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The Company evaluates transfers between levels at the end of each reporting period.

***Property and equipment***

Property and equipment are recorded at cost, less accumulated depreciation. Expenditures for repairs and maintenance are expensed as incurred. When assets are retired or disposed of, the assets and related accumulated depreciation are derecognized from the accounts, and any resulting gain or loss is included in the determination of net loss.

Depreciation on equipment is calculated using the straight-line method over the estimated useful lives of the assets as follows:

---

| | |
|:---|:---|
| **Asset category** | **Estimated useful life** |
| Laboratory equipment | 5 years |
| Computer equipment | 3 years |
| Office equipment, furniture and fixtures | 5 years |
| Leasehold improvements | Lesser of useful life or remaining lease term |

---

***Leases***

The Company accounts for leases in accordance with ASC Topic 842, *Leases*, or ASC 842. At the inception of an arrangement, the Company determines whether the arrangement is or contains a lease based on specific facts and circumstances present, the existence of an identified asset(s), if any, and the Company's control over the use of the identified asset(s), if applicable. As provided by ASC 842, the Company elected to combine lease and non-lease components as a single component for all leases. Operating lease liabilities and their corresponding right-of-use assets are recorded based on the present value of future lease payments over the expected lease term. Certain adjustments to the right-of-use asset may be required for items such as incentives received. The Company typically only includes an initial lease term in its assessment of a lease arrangement; options to renew a lease are not included in the assessment unless there is reasonable certainty that the Company will renew. The interest rate implicit in lease contracts is typically not readily determinable. As such, in calculating the lease liability, the Company utilizes its incremental borrowing rate, which is the rate incurred to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. Lease expense is recognized over the expected lease term on a straight-line basis.

***Impairment of long-lived assets***

The Company evaluates its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceed the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell.

***Warrants***

The Company accounts for warrants as either equity-classified or liability-classified instruments based on an assessment of the warrant's specific terms and applicable authoritative guidance in ASC 480, "Distinguishing Liabilities from Equity" ("ASC 480"), and ASC 815, "Derivatives and Hedging" ("ASC 815"). The assessment considers whether the warrants are freestanding financial instruments pursuant to ASC 480, 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, including whether the warrants are indexed to the Company's own ordinary shares and whether warrant holders could potentially require "net cash settlement" in a circumstance outside of the Company's control, among other conditions for equity classification. This assessment, which requires the use of professional judgment, is conducted at the time of warrant issuance and as of each subsequent quarterly period end-date while the warrants are outstanding.

For issued or modified warrants that meet all the criteria for equity classification, the warrants are required to be recorded as a component of equity at the time of issuance. For issued or modified warrants that do not meet all the criteria for equity classification, the warrants are required to be recorded as liabilities at their initial fair value on the date of issuance, and each balance sheet date thereafter. Changes in the estimated fair value of warrants classified as liabilities are recognized as a non-cash gain or loss on the statements of operations.

The Pre-Funded Warrants, Class A Warrants, and Class B warrants that the Company issued in conjunction with the 2025 Offering met the criteria for equity classification under ASC 815 and were classified as equity.

***Commitments and contingencies***

Liabilities for loss contingencies arising from claims, assessments, litigation, fines and penalties and other sources are recorded when it is probable that a liability has been incurred, and the amount can be reasonably estimated. Legal costs incurred in connection with loss contingencies are expensed as incurred.

***Revenue recognition***

The Company recognizes revenue in accordance with ASC Topic 606, *Revenue from Contracts with Customers*, or ASC 606. This standard applies to all contracts with customers, except for contracts that are within the scope of other standards. Under ASC 606, an entity recognizes revenue when its customer obtains control of promised goods or services, in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services.

The Company enters into collaboration and licensing agreements with strategic partners, which are within the scope of ASC 606, under which it may exclusively license rights to research, develop, manufacture, and commercialize its product candidates to third parties. The terms of these arrangements typically include payment to the Company of one or more of the following: (1) non-refundable, upfront license fees; (2) reimbursement of certain costs; (3) customer option fees for additional goods or services; (4) development milestone payments; (5) regulatory and commercial milestone payments; and (6) royalties on net sales of licensed products.

In determining the appropriate amount of revenue to be recognized as it fulfills its obligations under each of its agreements, the Company performs the following steps: (i) identification of the promised goods or services in the contract; (ii) determination of whether the promised goods or services are performance obligations including whether they are distinct in the context of the contract; (iii) measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance obligations; and (v) recognition of revenue when (or as) the Company satisfies each performance obligation. As part of the accounting for these arrangements, the Company must use its judgment to determine: (a) the number of performance obligations based on the determination under step (ii) above; (b) the transaction price under step (iii) above; (c) the stand-alone selling price for each performance obligation identified in the contract for the allocation of transaction price in step (iv) above; and (d) the contract term and pattern of satisfaction of the performance obligations under step (v) above. The Company uses judgment to determine whether milestones or other variable consideration, except for royalties, should be included in the transaction price as described further below. The transaction price is allocated to each performance obligation on a relative stand-alone selling price basis, for which the Company recognizes revenue as or when the performance obligations under the contract are satisfied.

Amounts due to the Company for satisfying the revenue recognition criteria or that are contractually due based upon the terms of the collaboration agreements are recorded as accounts receivable in the Company's consolidated balance sheet.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

Amounts received prior to satisfying the revenue recognition criteria are recorded as deferred revenue in the Company's consolidated balance sheets. Amounts expected to be recognized as revenue within the 12 months following the balance sheet date are classified as current deferred revenue. Amounts not expected to be recognized as revenue within the 12 months following the balance sheet date are classified as deferred revenue, net of current portion.

*Upfront license fees* 

If the license to the Company's intellectual property is determined to be distinct from the other promises or performance obligations identified in the arrangement, the Company recognizes revenue from non-refundable, upfront fees allocated to the license when the license is transferred to the customer and the customer is able to use and benefit from the license. In assessing whether a promise or performance obligation is distinct from the other promises, the Company considers factors such as the research, manufacturing, and commercialization capabilities of the customer; the retention of any key rights by the Company; and the availability of the associated expertise in the general marketplace. In addition, the Company considers whether the customer can benefit from a promise for its intended purpose without the receipt of the remaining promises, whether the value of the promise is dependent on the unsatisfied promise, whether there are other vendors that could provide the remaining promise and whether it is separately identifiable from the remaining promise. For licenses that are combined with other promises, the Company exercises judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue. The Company evaluates the measure of progress each reporting period and, if necessary, adjusts the measure of performance and related revenue recognition.

*Customer options*

If an arrangement is determined to contain customer options that allow the customer to acquire additional goods or services, the goods and services underlying the customer options are not considered to be performance obligations at the outset of the arrangement, as they are contingent upon option exercise. The Company evaluates the customer options for material rights or options to acquire additional goods or services for free or at a discount. If the customer options are determined to represent a material right, the material right is recognized as a separate performance obligation at the outset of the arrangement. The Company allocates the transaction price to material rights based on the relative standalone selling price, which is determined based on the identified discount and the probability that the customer will exercise the option. Amounts allocated to a material right are not recognized as revenue until, at the earliest, the option is exercised. If an option is not exercised and the target is terminated, the Company will accelerate and recognize all remaining revenue related to the material right performance obligation.

*Research and development services*

The promises under the Company's collaboration agreements may include research and development services to be performed by the Company for or on behalf of the customer. Payments or reimbursements resulting from the Company's research and development efforts are recognized as the services are performed and presented on a gross basis because the Company is the principal for such efforts. Reimbursements from and payments to the customer that are the result of a collaborative relationship with the customer, instead of a customer relationship, such as co-development activities, are recorded as a reduction to research and development expense.

*Milestone payments*

At the inception of each arrangement that includes development milestone payments, the Company evaluates whether the milestones are considered probable of being achieved and estimates the amount to be included in the transaction price using the most likely amount method. If it is probable that a significant revenue reversal would not occur, the associated milestone value is included in the transaction price. Milestone payments that are not within the control of the Company or the licensee, such as regulatory approvals, are not considered probable of being achieved until those approvals are received. The Company evaluates factors such as the scientific, clinical, regulatory, commercial and other risks that must be overcome to achieve the particular milestone in making this assessment. There is considerable judgment involved in determining whether it is probable that a significant revenue reversal would not occur. At the end of each subsequent reporting period, the Company reevaluates the probability of achievement of all milestones subject to constraint and, if necessary, adjusts its estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect revenues and earnings in the period of adjustment.

For further discussion of accounting for collaboration revenues, see *Note 8. Collaboration and license agreements.*

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

***Research and development expenses***

Research and development costs are expensed as incurred and consist of the costs associated with conducting preclinical studies and clinical trials, which primarily include salaries, stock-based compensation and other employee benefit expenses, lab related supplies and other operational costs related to the Company's research and development activities, including allocated facility-related expenses and external costs of outside vendors engaged to conduct research and development activities.

Clinical trial costs are a significant component of the Company's research and development expenses. The Company historically has contracted with third parties that perform various clinical trial activities on behalf of the Company in the ongoing development of the Company's product candidates. As part of the process of preparing the consolidated financial statements, the Company is required to estimate their accrued research and development expenses. The Company makes estimates of the accrued expenses as of each balance sheet date in the consolidated financial statements based on facts and circumstances known at that time, and include reviewing open contracts and purchase orders, communicating with its personnel to identify services that have been performed on its behalf and estimating the level of service performed and the associated costs incurred for the services when the Company has not yet been invoiced or otherwise notified of the actual costs. If contracted amounts with third parties are modified (for instance, as a result of changes in the clinical trial protocol or scope of work to be performed), the Company will modify the related accruals accordingly on a prospective basis. Revisions in the scope of a contract are charged to expense in the period in which the facts that give rise to the revision become reasonably certain.

In addition, there may be instances in which payments made to the Company's vendors will exceed the level of services provided and result in a prepayment of the expense, in which case such amounts are reflected as prepaid expenses and other current assets. In accruing service fees, the Company estimates the time period over which services will be performed and the level of effort to be expended in each period. If the actual timing of the performance of services or the level of effort varies from the estimate, the Company adjusts the accrual or the amount of prepaid expenses accordingly. Nonrefundable advance payments for goods or services to be received in the future for use in research and development activities are deferred and capitalized in prepaid expenses and other current assets. The capitalized amounts are expensed as the related goods are delivered or the services are performed.

***Stock-based compensation***

The Company applies ASC Topic 718, *Compensation - Stock Compensation*, or ASC 718, to account for its stock-based payments. In accordance with the ASC 718, the Company determines whether an award should be classified and accounted for as a liability award or an equity award. All of the Company's grants of stock-based awards to employees were classified as equity awards and are recognized in the Company's financial statements based on the grant date fair value measured using the Black-Scholes option pricing model. The Black-Scholes option pricing model estimates the fair value of the equity award using the expected term, expected volatility, risk-free interest rate, dividend rate, and the fair value of the common stock underlying the stock-based award.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Company estimates the expected term using the "simplified" method, whereby, the expected term equals the arithmetic average of the vesting term and the contractual term of the option.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Due to the lack of sufficient company-specific historical and implied volatility data, the Company has based its computation of expected volatility on the historical volatility of a representative group of public companies with similar characteristics to the Company, including stage of product development and life science industry focus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The risk-free interest rates for periods within the expected life of the option were based on the U.S. Treasury yield curve in effect during the period the options were granted.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The expected dividend yield is assumed to be zero as the Company has never paid dividends and currently has no plans to pay any dividends on its common stock.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The fair value of the common stock underlying shared-based awards is the quoted market price of the Company's common stock on the date of the grant.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• The Company recognizes forfeitures as they occur.

The fair value of the awards are recognized as stock-based compensation expense on a straight-line basis over the requisite service period of the awards, which is generally the vesting period. For awards subject to both performance and service-based vesting conditions, the Company recognizes stock-based compensation expense over the remaining service period if the performance condition is considered probable of achievement using management's best estimates. Stock-based

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

compensation expense is classified in the consolidated statement of operations and comprehensive loss in the same manner in which the award recipients' payroll costs are classified or in which the award recipients' service payments are classified.

A change in any of the terms or conditions of an equity award is accounted for as a modification of the award. Incremental compensation cost is measured as the excess, if any, of the fair value of the modified award over the fair value of the original award immediately before its terms are modified, measured based on the fair value of the awards and other pertinent factors at the modification date. For vested awards, the Company recognizes incremental compensation cost in the period the modification occurs. For unvested awards, the Company recognizes the expense over the remaining requisite service period, the sum of the incremental compensation cost and the remaining unrecognized compensation cost for the original award on the modification date. If the fair value of the modified award is lower than the fair value of the original award immediately before modification, the minimum compensation cost the Company recognizes is the cost of the original award.

***Income taxes***

The Company accounts for income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequence of events that have been recognized in the consolidated financial statements or the Company's tax returns. Under this method, deferred tax assets and liabilities are determined based on the differences between the consolidated financial statements and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Changes in deferred tax assets and liabilities are recorded in the provision for income taxes. The Company assesses the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent it believes, based upon the weight of available evidence, that it is more likely than not that all or a portion of the deferred tax assets will not be realized, a valuation allowance is established.

The Company evaluates its uncertain tax positions using the provisions of ASC Topic 740, *Income taxes*, or ASC 740, which prescribes a recognition threshold that a tax position is required to meet before being recognized in the consolidated financial statements by using a "more-likely-than-not" criteria for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The provision for income taxes includes the effects of any resulting tax reserves, or unrecognized tax benefits, which are considered appropriate as well as the related net interest and penalties.

***Comprehensive loss***

Comprehensive loss is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. Comprehensive loss includes net loss as well as other changes in stockholders' equity which includes certain changes in equity that are excluded from net loss. The Company's only element of other comprehensive income is unrealized gains and losses on marketable securities.

***Net loss per share***

The Company applies the two-class method to compute basic and diluted net income (loss) per share attributable to common stockholders when it has issued shares that meet the definition of participating securities. The two-class method determines net income (loss) per share for each class of common and participating securities according to dividends declared or accumulated and participation rights in undistributed earnings. The two-class method requires income (loss) available to common stockholders for the period to be allocated between common and participating securities based upon their respective rights to share in the earnings as if all income (loss) for the period had been distributed. The Company's pre-funded warrants, Class A warrants, and Class B warrants participate in any dividends declared by the Company and are therefore considered to be participating securities. The participating securities are not required to participate in the losses of the Company, and therefore during periods of loss there is no allocation required under the two-class method.

Basic net income (loss) per share attributable to common stockholders is computed by dividing the net income (loss) attributable to common stockholders by the weighted average number of shares of common stock outstanding for the period. Diluted net income (loss) attributable to common stockholders is computed by adjusting net income (loss) per share attributable to common stockholders to reallocate undistributed earnings based on the potential impact of dilutive securities. Diluted net income (loss) per share attributable to common stockholders is computed by dividing the diluted net income (loss) attributable to common stockholders by the weighted average number of shares of common stock outstanding for the period, including potential dilutive common shares. The Company computes diluted (loss) earnings per share after giving consideration to the dilutive effect of stock options and unvested restricted stock that are outstanding during the period, except where such securities would be anti-dilutive.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

Common stock equivalent shares are excluded from the computation of diluted net loss per share if their effect is antidilutive. In periods in which the Company reports a net loss, diluted net loss per share is generally the same as basic net loss per share since dilutive common shares are not assumed to have been issued if their effect is anti-dilutive.

***Going concern***

At each reporting period, the Company evaluates whether there are conditions or events 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 Company is required to make certain additional disclosures if it concludes substantial doubt exists and it is not alleviated by the Company's plans or when its plans alleviate substantial doubt about the Company's ability to continue as a going concern. The Company's evaluation entails analyzing prospective operating budgets and forecasts for expectations of the Company's cash needs and comparing those needs to the current cash, cash equivalent, and marketable securities balances.

***Recently adopted accounting standards***

In December 2023, the FASB issued ASU 2023-09, *Income Taxes (Topic 740): Improvements to Income Tax Disclosures*, or ASU 2023-09. ASU 2023-09 requires a company's annual financial statements to include consistent categories and greater disaggregation of information in the rate reconciliation, and income taxes paid disaggregated by jurisdiction. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. Adoption is either with a prospective method or a fully retrospective method of transition.

The Company has adopted Accounting Standards Update 2023-09, *Income Taxes (Topic 740): Improvements to Income Tax Disclosures* ("ASU 2023-09") for the year ended December 31, 2025, and applied the new disclosure requirements prospectively to the current annual period. Prior period disclosures have not been adjusted to reflect the new disclosure requirements. Please see additional disclosures related to income taxes in Note 12, *Income Taxes,* in the Notes to Consolidated Financial Statements.

***Recently issued accounting standards***

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, or ASU 2024-03. ASU 2024-03 requires enhanced disclosures of disaggregated income statement expenses. Disclosure within the notes of the financial statements for each annual and interim period should include: employee compensation, depreciation, and intangible asset amortization, included in each relevant expense caption; certain amounts that are already required to be disclosed under current GAAP in the same disclosure as the other disaggregation requirement; a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively; and the total amount of selling expenses and, in annual reporting periods, an entity's definition of selling expenses. ASU 2024-03 is effective for fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning December 15, 2027. Early adoption is permitted. The Company is currently evaluating the effect that adoption of ASU 2024-03 will have on its consolidated financial statements.

**Note 3. Fair value measurements**

The following tables present information about the Company's financial assets measured at fair value on a recurring basis and indicates the level of the fair value hierarchy utilized to determine such fair values as of December 31, 2025 (in thousands):

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Fair Value** | **Level 1** | **Level 2** | **Level 3** |
| Cash equivalents: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Money market funds | $59857 | $59857 | $— | $— |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | 11476 |  | 11476 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. government debt securities | 3000 |  | 3000 |  |
| Marketable securities: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | 176614 |  | 176614 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury securities | 29130 |  | 29130 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. government debt securities | 16753 |  | 16753 |  |
| Total cash equivalents and marketable securities | $296830 | $59857 | $236973 | $— |

---

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

The following table sets forth the fair value of the Company's financial assets by level within the fair value hierarchy at December 31, 2024 (in thousands):

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Fair Value** | **Level 1** | **Level 2** | **Level 3** |
| Cash equivalents: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Money market funds | $46219 | $46219 | $— | $— |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury securities | 9043 |  | 9043 |  |
| Marketable securities: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | 186931 |  | 186931 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury securities | 18302 |  | 18302 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. government debt securities | 6531 |  | 6531 |  |
| Total cash equivalents and marketable securities | $267026 | $46219 | $220807 | $— |

---

The Company classifies its money market funds, which are valued based on quoted market prices in active markets, with no valuation adjustment, as Level 1 assets within the fair value hierarchy.

Marketable securities consist of U.S. Treasury securities, U.S. government debt securities, and corporate debt securities, all of which are classified as available-for-sale pursuant to ASC 320, *Investments – Debt and Equity Securities*. Marketable securities are classified within Level 2 of the fair value hierarchy because pricing inputs are other than quoted prices in active markets, which are either directly or indirectly observable as of the reporting date, and fair value is determined using models or other valuation methodologies on a recurring basis.

**Note 4. Marketable securities**

Marketable securities at December 31, 2025 consisted of the following (in thousands):

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Amortized**<br>**Cost** | **Gross**<br>**Unrealized**<br>**Gains** | **Gross**<br>**Unrealized**<br>**Losses** | **Fair**<br>**Value** |
| Marketable securities, current: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | $131038 | $50 | $(37) | $131051 |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury securities | 28107 | 26 | (2) | 28131 |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. government debt securities | 14756 |  | (4) | 14752 |
| Marketable securities, non-current |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | 45544 | 33 | (14) | 45563 |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. government debt securities | 2002 |  | (1) | 2001 |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury securities | $1000 | $— | $(1) | $999 |
| Total marketable securities, current and non-current | $222447 | $109 | $(59) | $222497 |

---

Marketable securities at December 31, 2024 consisted of the following (in thousands):

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Amortized**<br>**Cost** | **Gross**<br>**Unrealized**<br>**Gains** | **Gross**<br>**Unrealized**<br>**Losses** | **Fair**<br>**Value** |
| Marketable securities, current: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | $164469 | $189 | $(85) | $164573 |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury securities | 18291 | 12 | (1) | 18302 |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. government debt securities | 6527 | 4 |  | 6531 |
| Marketable securities, non-current |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | 22424 | 12 | (78) | 22358 |
| Total marketable securities, current and non-current | $211711 | $217 | $(164) | $211764 |

---

Marketable securities classified as current have maturities of less than one year. Marketable securities classified as non-current are those that: (i) have a maturity of greater than one year, and (ii) the Company does not intend to liquidate within

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

the next twelve months, although these funds are available for use and, therefore, are classified as available-for-sale. No available-for-sale debt securities held as of December 31, 2025 or December 31, 2024 had remaining maturities greater than five years.

Marketable securities in unrealized loss positions as of December 31, 2025 consisted of the following (in thousands, except number of securities):

---

| | | | |
|:---|:---|:---|:---|
| | **Number of<br>Securities** | **Fair<br>Value** | **Gross<br>Unrealized<br>Losses** |
| Marketable securities in continuous unrealized loss position for less than 12 months: |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | 46 | $80929 | $(50) |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. government debt securities | 14 | 19753 | (5) |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury securities | 5 | 7502 | (3) |
| Marketable securities in continuous unrealized loss position for greater than 12 months: |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | 3 | 3746 | (1) |
| Total marketable securities in unrealized loss position | 68 | $111930 | $(59) |

---

Marketable securities in unrealized loss positions as of December 31, 2024 consisted of the following (in thousands, except number of securities):

---

| | | | |
|:---|:---|:---|:---|
| | **Number of<br>Securities** | **Fair<br>Value** | **Gross<br>Unrealized<br>Losses** |
| Marketable securities in continuous unrealized loss position for less than 12 months: |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Corporate debt securities | 41 | $62447 | $(163) |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. Treasury securities | 2 | 2981 | (1) |
| &nbsp;&nbsp;&nbsp;&nbsp;U.S. government debt securities | 1 | 1986 |  |
| Total marketable securities in unrealized loss position | 44 | $67414 | $(164) |

---

Based on factors such as historical experience, market data, issuer-specific factors, and current economic conditions, the Company did not record an allowance for credit losses at December 31, 2025 and 2024, related to these securities.

**Note 5. Property and equipment**

Property and equipment consisted of the following (in thousands):

---

| | | |
|:---|:---|:---|
| | **As of December 31,** | **As of December 31,** |
| | **2025** | **2024** |
| Property and equipment |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Laboratory equipment | $8819 | $8212 |
| &nbsp;&nbsp;&nbsp;&nbsp;Leasehold improvements | 4548 | 4712 |
| &nbsp;&nbsp;&nbsp;&nbsp;Furniture and fixtures | 1435 | 1435 |
| &nbsp;&nbsp;&nbsp;&nbsp;Office equipment | 621 | 621 |
| &nbsp;&nbsp;&nbsp;&nbsp;Computer equipment | 98 | 98 |
| Total property and equipment | 15521 | 15078 |
| Less: accumulated depreciation | (10777) | (9236) |
| Total property and equipment, net | $4744 | $5842 |

---

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

Depreciation expense related to property and equipment was as follows (in thousands):

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Depreciation expense | $1541 | $1473 |

---

**Note 6. Leases**

In July 2017, the Company entered into a lease of office and laboratory space for its headquarters in Watertown, Massachusetts, or the Watertown Lease. The Watertown Lease had a non-cancelable term of ten years with an option to extend for one additional five-year period and is subject to rent escalation throughout the term. Additionally, the Watertown Lease required the Company to provide collateral, which was recorded as restricted cash on the consolidated balance sheets. The Watertown Lease commenced in April 2018. The Watertown Lease was classified as an operating lease and, upon the commencement in April 2018, the Company recorded a lease liability of $15.1 million and a right-of-use asset of $16.7 million, which is inclusive of $1.5 million of construction costs funded by the Company. In initially calculating the lease liability and the right-of-use asset, the Company did not include the additional five-year period option as management did not believe there was reasonable certainty that the Company would exercise the option. In addition to rent, the Company is also responsible for paying its pro rata share of costs incurred for common area maintenance, real estate taxes and property insurance related to the leased space, which are accounted for as variable lease costs.

In November 2021, the Company entered into an amendment to the Watertown Lease, or the Amended Lease. The Amended Lease serves to extend the lease term of the Company's existing leased space, or the Existing Leased Space, and provides additional office and laboratory space, or the Newly Leased Space. The Amended Lease commenced in January 2022 and the Company's obligation to pay rent on the Newly Leased Space commenced in March 2022, with the amount of this new rent obligation added to the Company's continuing obligation to pay rent on the Existing Leased Space. The Amended Lease terminates in March 2032, which is 10 years from the rent commencement date for the Newly Leased Space. The Amended Lease is subject to fixed rate rent escalations, provides for up to $2.6 million in tenant improvements, and provides an option for the Company to extend the lease term of the Amended Lease for one additional five-year period. Upon executing the Amended Lease, the Company increased its collateral to $3.3 million, which is recorded as restricted cash on the accompanying consolidated balance sheets as of December 31, 2025 and 2024. In addition to rent, under the terms of the Amended Lease, the Company is also responsible for paying its pro rata share of costs incurred for common area maintenance, real estate taxes and property insurance related to the leased space, including both the Existing Leased Space and, as of January 2022, the Newly Leased Space, which amounts are accounted for as variable lease costs.

*Accounting for the amended lease*

As the Amended Lease extends the term of the Existing Leased Space and provides access to the Newly Leased Space, in accordance with the provisions of ASC 842, the Company accounted for the Amended Lease as two separate contracts: 1) modification of the existing lease agreement to extend the lease term of the Existing Leased Space, and 2) new lease agreement for the right-of-use of the Newly Leased Space.

As the Company maintained control of the Existing Leased Space upon execution of the Amended Lease, the Company recorded an increase in right-of-use asset and lease liability of $20.1 million related to the new rental payments during the extended term and current incremental borrowing rate of the Existing Leased Space upon execution of the Amended Lease. The calculation of the lease liability and the right-of-use asset of the Existing Leased Space does not include the additional five-year period option as the Company does not believe there is reasonable certainty that the option will be exercised.

As noted above, the lease for the Newly Leased Space commenced in January 2022. As a result, the Company recorded a right-of-use asset of $44.4 million, and a corresponding lease liability of $44.1 million for the Newly Leased Space. The calculation of the lease liability and the right-of-use asset of the Newly Leased Space does not include the additional five-year period option provided under the Amended Lease as the Company does not believe there is reasonable certainty that the option will be exercised. As stated above, the Amended Lease provides for up to $2.6 million of tenant improvement allowance which was used in full in the year ended December 31, 2023.

In May 2022, the Company entered into a sublease agreement with a third party, or the Sublease, for a portion of the office and laboratory space in Suite 200 at 490 Arsenal Way, Watertown, Massachusetts. The term of the Sublease ended in June 2025.

In September 2025, the Company entered into a sublease agreement with a third party, or the 2025 Sublease, for a portion of the office and laboratory space in Suite 200 at 490 Arsenal Way, Watertown, Massachusetts. The term of the 2025

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

Sublease commences in February 2026 and ends in January 2029, with an option to extend for an additional two year term. This transaction triggered an impairment analysis, which resulted in the recognition of a $10.6 million impairment charge for the Suite 200 right-of-use (ROU) asset for the year ended December 31, 2025.

The impairment charge reduces the carrying value of the associated ROU asset, leasehold improvements and certain furniture and fixture assets that remained in the facility to their estimated fair values. The fair values are estimated using a discounted cash flows approach based on forecasted future cash flows expected to be derived from the property based on current sublease market rent, which is considered a Level 3 input in the fair value hierarchy, and other key assumptions such as future sublease market conditions and the discount rate.

The elements of lease costs were as follows (in thousands):

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Lease cost: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Operating lease cost | $9747 | $10030 |
| &nbsp;&nbsp;&nbsp;&nbsp;Variable lease cost | 2649 | 1843 |
| &nbsp;&nbsp;&nbsp;&nbsp;Sublease income | (1637) | (2626) |
| Total lease cost | $10759 | $9247 |

---

The following table summarizes the lease term and incremental borrowing rate applied in arriving at the lease liability:

---

| | | |
|:---|:---|:---|
| | **As of December 31,** | **As of December 31,** |
| | **2025** | **2024** |
| Remaining lease term | 6.1 years | 7.1 years |
| Incremental borrowing rate | 5.3% | 5.3% |

---

Future lease payments under non-cancelable leases as of December 31, 2025 for each of the years ending December 31 are as follows (in thousands):

---

| | |
|:---|:---|
| Undiscounted lease payments: |  |
| &nbsp;&nbsp;&nbsp;&nbsp;2026 | $9366 |
| &nbsp;&nbsp;&nbsp;&nbsp;2027 | 9646 |
| &nbsp;&nbsp;&nbsp;&nbsp;2028 | 11362 |
| &nbsp;&nbsp;&nbsp;&nbsp;2029 | 12413 |
| &nbsp;&nbsp;&nbsp;&nbsp;2030 | 12785 |
| &nbsp;&nbsp;&nbsp;&nbsp;Thereafter | 15553 |
| Total undiscounted lease payments | 71125 |
| Less: imputed interest | (11143) |
| Total operating lease liability as of December 31, 2025 | $59982 |

---

**Note 7. Accrued expenses and other current liabilities**

Accrued expenses and other current liabilities consisted of the following (in thousands):

---

| | | |
|:---|:---|:---|
| | **As of December 31,** | **As of December 31,** |
| | **2025** | **2024** |
| Accrued expenses and other current liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Accrued compensation and benefits | $8656 | $7428 |
| &nbsp;&nbsp;&nbsp;&nbsp;Accrued research and development | 3259 | 10064 |
| &nbsp;&nbsp;&nbsp;&nbsp;Other | 1399 | 1871 |
| Total accrued expenses and other current liabilities | $13314 | $19363 |

---

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

**Note 8. Collaboration and license agreements**

***Pfizer Collaboration and Supply Agreement***

On September 30, 2025, the Company entered into a Clinical Trial Collaboration and Supply Agreement, or the Pfizer Agreement, with Pfizer, Inc., or Pfizer. Pursuant to the Pfizer Agreement, Pfizer will supply the Company with elranatamab (ELREXFIO<sup>®</sup>), a B-cell maturation antigen CD3 targeted bispecific antibody, for the Company's upcoming Phase 1b trial evaluating the safety and tolerability of cemsidomide, an IKZF1/3 degrader, and dexamethasone in combination with elranatamab as a second-line or later therapy for patients with multiple myeloma. Under the terms of the Pfizer Agreement, Pfizer will supply elranatamab for use in the trial at no cost to the Company and the Company will sponsor, conduct and pay the costs of the trial. The Pfizer Agreement provides that the Company and Pfizer will jointly own clinical data generated from the trial. The collaboration is managed by a joint development committee responsible for coordinating all regulatory and other activities under the Pfizer Agreement. Under the terms of the Pfizer Agreement, each party has various termination rights under certain circumstances, including material breach, insolvency, and other customary provisions, subject to certain conditions.

***Merck KGaA Collaboration and License Agreement***

On March 1, 2024, the Company entered into a license and collaboration agreement, or the Merck KGaA Agreement, with Merck KGaA, Darmstadt, Germany, or Merck KGaA, to discover two targeted protein degraders against critical oncogenic proteins.

Under the terms of the Merck KGaA Agreement, the Company granted Merck KGaA a worldwide, exclusive license under certain of the Company's intellectual property rights to develop, manufacture, and commercialize two targeted protein degraders against critical oncogenic proteins within the KRAS family. Merck KGaA is responsible for all development, regulatory approval, manufacturing and commercialization costs. Under the terms of the Merck KGaA Agreement, Merck KGaA agreed to make an upfront cash payment of $16.0 million and to fund the Company's discovery research efforts. The Company is eligible to receive approximately $740.0 million in the aggregate in discovery, regulatory, and commercial milestone payments across the collaboration, plus tiered royalties on net sales. Royalties payable from Merck KGaA to the Company range from mid-single digit to low-double digit percentages, subject to reductions under certain circumstances as described in the Merck KGaA Agreement. In April 2025, the Company earned a $1.0 million milestone for the achievement of a discovery milestone for one of the active collaboration targets, which resulted in the addition of $1.0 million to the transaction price for the collaboration.

The collaboration is managed by a joint research committee, or Merck KGaA JRC, and a joint steering committee, or Merck KGaA JSC, each of which is comprised of representatives of Merck KGaA and the Company. Under the Merck KGaA Agreement, Merck KGaA has final decision-making authority over the Merck KGaA JSC, which has the authority to decide matters that cannot be resolved by the Merck KGaA JRC. Merck KGaA may terminate the Merck KGaA Agreement on a project-by-project basis or in its entirety upon 60 days' prior written notice. Each party also has various termination rights under certain circumstances, including but not limited to patent challenges, insolvency, or a material breach by the other party, subject to certain conditions. As the research activities with Merck KGaA have progressed and evolved over time, there is now one target on which the parties continue to collaborate.

*Merck KGaA Agreement Accounting*

The Company identified two performance obligations at the outset of the Merck KGaA Agreement, represented by the two potential research and development targets. While the Company is obligated under the Merck KGaA Agreement to provide the exclusive license and perform certain research activities, the Company determined that the license, the research activities, and participation on the Merck KGaA JRC and Merck KGaA JSC are considered promised services. Participation on the Merck KGaA JRC and Merck KGaA JSC to oversee the research activities contemplated under the Merck KGaA Agreement were determined to be quantitatively and qualitatively immaterial and, therefore, were excluded from the performance obligations. The total transaction price of the Merck KGaA Agreement is allocated to the performance obligations based on their relative standalone selling price. The Company recognizes the transaction price allocated to the performance obligations as the research and development services are provided, using an input method, in proportion to costs incurred to date for each research development target as compared to total costs incurred and expected to be incurred in the future to satisfy the underlying obligation. Incremental fees for research and development services are paid at agreed upon FTE rates and recognized as revenue in the period incurred.

As of December 31, 2025, the total transaction price of $17.0 million is allocated to the one remaining performance obligation and $3.9 million remains unsatisfied.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

Amounts due to the Company that have not yet been received are recorded as accounts receivable and amounts received that have not yet been recognized as revenue are recorded in deferred revenue on the Company's condensed consolidated balance sheet.

***Betta Pharma License and Collaboration Agreement***

On May 29, 2023, the Company entered into a license and collaboration agreement, or the Betta Pharma License Agreement, with Betta Pharmaceuticals, Co. Ltd., or Betta Pharma, to collaborate on the development, manufacturing, and commercialization of CFT8919 in Greater China, comprised of mainland China, Hong Kong SAR, Macau SAR and Taiwan, with the Company retaining rights to CFT8919 in the rest of the world other than Greater China, or the C4T Territory.

Under the terms of the Betta Pharma License Agreement, the Company granted Betta Pharma an exclusive license under certain of the Company's intellectual property rights to develop, manufacture and commercialize CFT8919 for all uses in humans in Greater China. Betta Pharma is responsible for all development, regulatory approval, manufacturing and commercialization costs in Greater China except where Betta Pharma acts as the Company's agent in Greater China in connection with a global trial sponsored by the Company. As part of the collaboration, Betta Pharma made an upfront cash payment of $10.0 million to the Company and has agreed to make up to $357.0 million in aggregate milestone payments, plus tiered royalties on net sales of CFT8919 in Greater China. These payments are subject to a withholding tax by the State Taxing Authority of the People's Republic of China. Royalties payable from Betta Pharma to the Company range from low to mid double-digit percent, subject to certain reductions under certain circumstances as described in the Betta Pharma License Agreement. In addition, as part of the collaboration, the Company has agreed to make milestone payments to Betta Pharma of up to $40.0 million following the Company's receipt of approval of a New Drug Application for CFT8919 from the FDA, with the milestone amount based on the percentage of patients in contemplated clinical trials that were enrolled by Betta Pharma and the line of therapy of the approval. In addition, the Company has agreed to pay Betta Pharma tiered royalties on net sales of CFT8919 in the C4T Territory in the low single digit percent range, subject to reductions under certain circumstances as described in the Betta Pharma License Agreement.

In connection with the execution of the Betta Pharma License Agreement, the Company, Betta Pharma, and an affiliate of Betta Pharma, Betta Investment (Hong Kong) Limited, or Betta Investment, entered into a stock purchase agreement dated May 29, 2023, or the Betta Stock Purchase Agreement, and together with the Betta Pharma License Agreement, or the Betta Agreements, pursuant to which Betta Investment agreed to purchase 5,567,928 shares of the Company's common stock, or the Shares, for an aggregate purchase price of approximately $25.0 million, or $4.49 per share, which represented a 25% premium over the 60-trading-day volume weighted average closing price as of two trading days prior to the effective date of the Betta Stock Purchase Agreement. The closing under the Betta Stock Purchase Agreement occurred on January 4, 2024. The $25.0 million of proceeds that the Company received were recorded as $20.0 million for the issuance of shares, with the remaining $5.0 million of premium paid on the share price recorded as consideration for revenue under the Betta Pharma License and Collaboration Agreement. The Betta Stock Purchase Agreement has certain restrictions customary to agreements of this nature. Based on a Schedule 13G filed with the SEC on January 12, 2024 and information known to the Company as of December 31, 2025, the Company believes that Betta Investment beneficially owns 4,874,550 shares of the Company's common stock. Following the Offering (as defined Note 9), Betta Investment is no longer considered a related party to the Company based on its current holdings.

The collaboration is managed by a joint steering committee, which is composed of representatives from both Betta Pharma and the Company. Following the completion of the dose escalation phase of the Phase 1 trial of CFT8919, Betta Pharma may terminate the Betta Pharma License Agreement for convenience upon at least 90 days' prior written notice. Each party also has various termination rights under certain circumstances, including but not limited to regulatory safety stoppages, patent challenges, insolvency, or a material breach by the other party, subject to certain conditions.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

*Betta Agreements accounting*

The Company expects to recognize revenue under the Betta Agreements from one type of arrangement, the licensing agreement. The Betta Agreements will consist of the following activities: (1) license of intellectual property, (2) clinical supply agreement, (3) manufacturing technology transfer, and (4) commercial manufacturing supply agreement. The clinical supply agreement, or the Betta Pharma Supply Agreement, was signed on August 31, 2024. The Company recognizes the transaction price allocated to the performance obligation as the costs related to manufactured clinical supply are incurred, using an input method, in proportion to costs incurred to date as compared to total costs incurred and expected to be incurred in the future to satisfy the underlying obligation. The clinical manufacturing costs are paid at agreed upon rates and included in the estimated transaction price. The estimated transaction price as of December 31, 2025 is $125.0

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

million, consisting of the $10.0 million upfront cash consideration, $5.0 million from the closing of the Betta Stock Purchase Agreement, a $2.0 million milestone achieved in December 2023 under the Betta Pharma License Agreement, and the estimated consideration expected to be received from the manufactured clinical supply of $108.0 million. This estimate includes a number of assumptions, including but not limited to the duration and total volume of clinical supply to be provided by the Company pursuant to the Betta Pharma Supply Agreement. In the event there are fluctuations in the Company's assumptions, the estimates of consideration expected to be received pursuant to the Betta Pharma Supply Agreement will also change. Due to scientific and technical uncertainties of the clinical trials, the Company cannot be certain that this amount will be recognized as revenue in future periods.

Amounts due to the Company that have not yet been received are recorded as accounts receivable and amounts received that have not yet been recognized as revenue are recorded as deferred revenue on the Company's consolidated balance sheet.

***Roche Collaboration and License Agreement***

In March 2016, the Company entered into a license agreement with Roche, which was amended in June 2016 and again in March 2017. The Company and Roche amended and restated that agreement (as so amended) in December 2018. This amended and restated agreement is referred to as the Roche Agreement. Under the Roche Agreement, the Company and Roche agreed to collaborate in the research, development, manufacture and commercialization of target-binding degrader medicines using the Company's proprietary TORPEDO platform for the treatment of cancers and other indications. Under the Roche Agreement, the Company may elect to opt into certain co-development rights, in which case the Company will receive an increased royalty rate on future product sales from products directed to that target. In addition, if the Company opts into certain co-detailing rights, it is also entitled to reimbursement of certain commercialization costs. Upon entry into the Roche Agreement, the Company received additional upfront consideration of $40.0 million.

In November 2020, the Company signed a further amendment, the effect of which was to provide that the parties would develop up to five potential targets, with Roche maintaining its option rights to license and commercialize products directed to those targets. The November 2020 amendment also provides a mechanism through which the Company and Roche can mutually agree to terminate the Roche Agreement on a target-by-target basis by the entry into a Mutual Target Termination Agreement. Upon the entry into a Mutual Target Termination Agreement, the Roche Agreement provides that all rights and responsibilities for know-how and other intellectual property in support of products that use inhibition as their mode of action revert to Roche and all rights and responsibilities for know-how and other intellectual property in support of products that use degradation as their mode of action revert to the Company. In support of this allocation of rights, Roche provides the Company, and the Company provides Roche, with a perpetual irrevocable, fully paid up, exclusive (even as to party granting the license), sublicensable (including in multiple tiers) license to the patents and know-how that are allocated to a party under a Mutual Target Termination Agreement. As the research activities with Roche have progressed and evolved over time, there are now two targets on which the parties continue to collaborate, with Roche maintaining its option rights to license and commercialize products directed to those two targets. In December 2023, the Company signed a second amendment to the Roche Agreement, the effect of which was to update the terms of the agreement as it pertains to the two targets on which the parties continue to collaborate. Under the second amendment to the Roche Agreement, Roche retains its option rights to license and commercialize products directed to those targets but the timing of its option rights are adjusted to begin upon Roche's receipt of the dose range finding data package. There was no material impact to the accounting in 2023 as a result of the second amendment to the Roche Agreement.

Under the Roche Agreement, as amended, the Company receives annual research plan payments of $1.0 million for each active research plan. For the two targets that remain under collaboration among the parties, Roche is required to pay the Company fees of $2.0 million upon the progression of targets to the lead series identification achievement phase. In March 2025, the Company achieved this $2.0 million milestone for each of the active collaboration targets, which resulted in the addition of $4.0 million to the transaction price for the collaboration. In the event Roche exercises its option rights as to one of these targets, Roche is required to pay the Company an option exercise fee of $8.0 million.

Under the Roche Agreement, as amended, for each target option exercised by Roche, the Company is eligible to receive milestone payments up to $273.0 million upon the achievement of certain development milestones with respect to corresponding products, subject to certain reductions and exclusions based on intellectual property coverage. Roche is also required to pay the Company up to $150.0 million per target in one-time sales-based milestone payments upon the achievement of specified levels of net sales of a product directed to such target. Finally, Roche is required to pay the Company tiered royalties ranging from the mid-single digits to mid-teen percentages on net sales of products sold by Roche pursuant to its exercise of its option rights, subject to certain reductions. For sales of products for which the Company exercises its co-development right, the applicable royalty rates will be increased by a low-single digit percentage.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

The collaboration is managed by a joint research committee, or Roche JRC. The Company has control over the Roche JRC prior to Roche's exercise of its option rights as to a particular target, with Roche assuming control of the Roche JRC thereafter, Roche may terminate the Roche Agreement on a target-by-target or product-by-product basis under several scenarios, upon at least 90 days' prior written notice. Each party also has various termination rights under certain circumstances, including but not limited to insolvency or a material breach by the other party, subject to certain conditions.

*Roche Agreement accounting* 

At commencement, the Company identified twelve performance obligations within the Roche Agreement, represented by the six potential research and development targets then included in the collaboration and the option rights held by Roche for each of those six targets. A non-exclusive royalty-free license to use the Company's intellectual property to conduct research and development activities, and participation on the Roche JRC were identified as promised services. However, the Company determined that the research and development license and research and development services were not distinct from one another, and participation on the Roche JRC was determined to be quantitatively and qualitatively immaterial.

The total transaction price of the Roche Agreement is allocated to the performance obligations based on their relative standalone selling price. The allocated transaction price is recognized as revenue from collaboration agreements in one of two ways:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Research and development targets: The Company recognizes the portion of the transaction price allocated to each of the research and development performance obligations as the research and development services are provided, using an input method, in proportion to costs incurred to date for each research development target as compared to total costs incurred and expected to be incurred in the future to satisfy the underlying obligation related to said research and development target. The transfer of control occurs over this period and, in management's judgment, is the best measure of progress towards satisfying the performance obligation.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Option rights: The transaction price allocated to the options rights, which are considered material rights, is recognized in the period that Roche elects to exercise or elects to not exercise its option right to license and commercialize the underlying research and development target.

The following table summarizes the allocation of the total transaction price to the identified performance obligations under the arrangement, and the amount of the transaction price unsatisfied as of December 31, 2025 (in thousands):

---

| | | |
|:---|:---|:---|
| | **Transaction**<br>**Price**<br>**Allocated** | **Transaction**<br>**Price**<br>**Unsatisfied** |
| Performance obligations: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Research and development targets | $20834 | $8049 |
| &nbsp;&nbsp;&nbsp;&nbsp;Option rights | 2397 | 2397 |
| Total | $23231 | $10446 |

---

Amounts due to the Company that have not yet been received are recorded as accounts receivable and amounts received that have not yet been recognized as revenue are recorded as deferred revenue on the Company's consolidated balance sheet.

***Merck License and Collaboration Agreement***

On December 11, 2023, the Company and Merck Sharp & Dohme, LLC, or Merck, entered into an exclusive license and collaboration agreement, or the Merck Agreement, to develop degrader-antibody conjugates, or DACs, an emerging modality designed to selectively target and neutralize disease-causing proteins in cancer cells. The Merck Agreement was terminated by Merck, effective late November 2025.

Under the terms of the Merck Agreement, the Company received a $10.0 million upfront payment in January 2024.

*Merck Agreement Accounting*

The Company identified one performance obligation at the outset of the Merck Agreement, which consists of: (1) the exclusive license and (2) the research activities for the initial undisclosed oncology target and the joint research plan. The Company determined that the license and research activities were not distinct from one another, as the license had limited value without the performance of the research activities by the Company. Participation on the Merck JRC to oversee the

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

research activities and the technology transfer associated with the Merck Agreement were determined to be quantitatively and qualitatively immaterial and therefore were excluded from performance obligations. The Company recognized the transaction price allocated to this performance obligation as the research and development services were provided, using an input method, in proportion to costs incurred for each research development target as compared to total costs incurred and expected to be incurred in the future to satisfy the underlying obligation. The transfer of control occurs over this period and, in management's judgment, was the best measure of progress towards satisfying the performance obligation.

As of December 31, 2025, the total transaction price of $10.0 million was allocated to the research and development services performance obligation and has been fully recognized.

***Biogen Collaboration Research and License Agreement***

In December 2018, the Company entered into a collaboration research and license agreement, or the Biogen Agreement, with Biogen MA, Inc., or Biogen. In February 2020, the Company and Biogen amended the Biogen Agreement to provide further clarity around Biogen's ownership of target binding moieties (which are portions of molecules), and any related intellectual property that are directed at or bind to collaboration targets. This amendment further provided that Biogen licenses to the Company rights to use these Biogen target binding moieties and any related intellectual property as needed in order to conduct the research and development activities contemplated under the Biogen Agreement. Pursuant to the terms of the Biogen Agreement, the Company and Biogen agreed to collaborate on research activities to develop novel treatments for neurological conditions such as Alzheimer's disease and Parkinson's disease through medicines that rely on TPD as their mode of action, all of which are created using the Company's degrader technology. Under the terms of the Biogen Agreement, the Company was engaged to develop TPD therapeutics that utilize degrader technology for up to five target proteins over a period of 54 months, ending in June 2023. On a target-by-target basis, after successful completion of a defined target evaluation period, Biogen assumes full rights and responsibility for continued development of each target. As of June 30, 2024, the research term of the Biogen Agreement has been fully satisfied.

In exchange for the non-exclusive research license from Biogen, as well as a $45.0 million nonrefundable upfront payment, the Company has granted Biogen a license to develop, commercialize, and manufacture products related to each of the targets (which is contingent on the parties not terminating the agreement), performs initial research services for drug discovery, has provided a non-exclusive research and commercial license to its intellectual property, and participates on the joint steering committee, or the Biogen JSC. For any target, following the achievement of development candidate criteria and prior to any IND-enabling study, Biogen will bear all costs and expenses of and will have sole discretion and decision-making authority with respect to the performance of further activities with respect to any degrader under development under the Biogen Agreement and all products that incorporate that degrader. Biogen is also required to pay the Company up to $35.0 million per target in development milestones and $26.0 million per target in one-time sales-based payments for the first product to achieve certain levels of net sales. In addition, Biogen is required to pay the Company royalties on a licensed product-by-licensed product basis, on worldwide net product sales. All milestone and sales-based payments are made after the Company has met the defined criteria in the joint research plan for that target, at which time Biogen will have control of the products related to the targets for commercialization; the receipt of these payments is contingent on the further development of products directed to the targets to commercialization by Biogen, without any additional research and development efforts from the Company.

In September 2025, the Company earned a $2.0 million milestone from Biogen after Biogen advanced BIIB142, a development candidate for IRAK4 that the Company delivered to Biogen, into the clinic. In April and September 2024, the Company earned payments of $8.0 million each from Biogen after Biogen accepted delivery of two development

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

candidates. The Company's performance obligation under the Biogen Agreement was fully satisfied as of March 31, 2024 and the transaction price has been fully allocated.

The Company has recognized the full amount as revenue during the year ended December 31, 2025.

***Summary of revenue recognized from collaboration agreements***

Revenue from collaboration agreements was as follows (in thousands):

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Revenue from collaboration agreements: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Merck KGaA Agreement | $18482 | $7304 |
| &nbsp;&nbsp;&nbsp;&nbsp;Merck Agreement | 6020 | 3979 |
| &nbsp;&nbsp;&nbsp;&nbsp;Betta Agreement | 649 | 3415 |
| &nbsp;&nbsp;&nbsp;&nbsp;Roche Agreement | 8796 | 3988 |
| &nbsp;&nbsp;&nbsp;&nbsp;Biogen Agreement | 2000 | 16898 |
| Total revenue from collaboration agreements | $35947 | $35584 |

---

Supplemental information related to the collaboration and license agreements consisted of the following in the Company's consolidated balance sheet as of December 31, 2025 (in thousands):

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Accounts**<br>**Receivable** | **Deferred**<br>**Revenue,**<br>**Current** | **Deferred**<br>**Revenue,**<br>**Net of Current** | **Deferred**<br>**Revenue,**<br>**Total** |
| Supplemental information: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Merck KGaA Agreement | $1892 | $3913 | $— | $3913 |
| &nbsp;&nbsp;&nbsp;&nbsp;Betta Agreement | 9 | 531 | 14194 | 14725 |
| &nbsp;&nbsp;&nbsp;&nbsp;Roche Agreement | 500 | 8049 | 1647 | 9696 |
| Total | $2401 | $12493 | $15841 | $28334 |

---

Supplemental information related to the collaboration and license agreements consisted of the following in the Company's consolidated balance sheet as of December 31, 2024 (in thousands):

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Accounts**<br>**Receivable** | **Deferred**<br>**Revenue,**<br>**Current** | **Deferred**<br>**Revenue,**<br>**Net of Current** | **Deferred**<br>**Revenue,**<br>**Total** |
| Supplemental information: |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Merck KGaA Agreement | $2064 | $5396 | $7977 | $13373 |
| &nbsp;&nbsp;&nbsp;&nbsp;Merck Agreement |  | 3441 | 2581 | 6022 |
| &nbsp;&nbsp;&nbsp;&nbsp;Betta Agreement | 1038 | 4038 | 11243 | 15281 |
| &nbsp;&nbsp;&nbsp;&nbsp;Roche Agreement |  | 5837 | 6656 | $12493 |
| Total | $3102 | $18712 | $28457 | $47169 |

---

Supplemental financial information related to the collaboration and license agreements are (in thousands):

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Revenue recognized that was included in the contract liability at the beginning of the period | $25930 | $12184 |
| Revenue recognized from performance obligations fully or partially satisfied in previous periods | 1339 |  |

---

As of December 31, 2025, the aggregate amount of the estimated transaction price allocated to performance obligations under the Merck KGaA Agreement, the Betta Agreements, and Roche Agreement that are partially unsatisfied was $135.1

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

million. The majority of the remaining transaction price to be recognized as revenue is based on the estimated manufactured clinical supply costs under the Betta Pharma collaboration. Due to scientific and technical uncertainties of the clinical trials, the Company cannot be certain that this amount will be recognized as revenue in future periods.

**Note 9. Stockholders' equity**

***At-The-Market Equity Program***

In November 2021, the Company filed an automatically effective registration statement on Form S-3, or the Registration Statement, with the SEC that registers the offering, issuance and sale of an unspecified amount of common stock, preferred stock, debt securities, warrants and/or units of any combination thereof. Simultaneously, the Company entered into a sales agreement with Cowen and Company, LLC (now known as TD Securities (USA) LLC), as sales agent, to provide for the issuance and sale by the Company of up to $200.0 million of common stock from time to time in "at-the-market" offerings under the Registration Statement and related prospectus filed with the Registration Statement, or the 2021 ATM Program. For the year ended December 31, 2024, the Company settled 4,132,122 shares for net proceeds of $24.4 million. As of December 31, 2024, a total of 15,318,264 shares of the Company's common stock were sold at an average price of $5.54 per share for proceeds, net of commissions and fees, of $82.3 million.

In October 2024, the Company filed a registration statement on Form S-3, or the 2024 Registration Statement, with the SEC that became effective on November 13, 2024 and registered the offering, issuance and sale of an unspecified amount of common stock, preferred stock, debt securities, warrants and/or units of any combination thereof. Simultaneously, the Company entered into a sales agreement with TD Securities (USA) LLC, as sales agent, to provide for the issuance and sale by the Company of up to $200.0 million of common stock from time to time in "at-the-market" offerings under the 2024 Registration Statement and related prospectus filed with the 2024 Registration Statement, or the 2024 ATM Program. For the year ended December 31, 2025, a total of 3,769,483 shares of the Company's common stock at an average purchase price of $2.55 had been sold through the 2024 ATM Program, resulting in net proceeds of $9.4 million. No sales were made in 2024 under the 2024 ATM Program. In October 2025, the Company terminated the sales agreement prospectus related to the 2024 ATM Program.

In November 2025, the Company filed a registration statement on Form S-3, or the 2025 Registration Statement, with the SEC that became effective on December 10, 2025 and registered the offering, issuance and sale of up to $400 million of common stock, preferred stock, debt securities, warrants and/or units or any combination thereof, together with a sales agreement prospectus for the offer and sale of up to $125.0 million of common stock from time to time in "at-the-market" offerings under the 2025 Registration Statement and related prospectus filed with the 2025 Registration Statement, or the 2025 ATM Program. No sales have been made under the 2025 ATM program for the year ended December 31, 2025.

***Certificate of Amendment to Fifth Amended and Restated Certificate of Incorporation***

In June 2025, the Company's stockholders approved, and the Company filed, an amendment to the Company's Fifth Amended and Restated Certificate of Incorporation to increase the number of authorized shares of common stock from 150,000,000 to 300,000,000. The certificate of amendment, which was filed with the Secretary of State of the State of Delaware, became effective on June 18, 2025.

***Underwritten Offering***

In October 2025, the Company entered into an underwriting agreement, or the Underwriting Agreement, with Jefferies LLC, TD Securities (USA) LLC and Evercore Group L.L.C., or collectively, the Underwriters, related to an underwritten offering, or the Offering, of (i) 21,895,000 shares, or the Shares, of the Company's common stock, par value $0.0001 per share, or the Common Stock; (ii) in lieu of Common Stock to certain investors, pre-funded warrants to purchase an aggregate of 28,713,500 shares of Common Stock, or the Pre-Funded Warrants; (iii) accompanying Class A warrants to purchase an aggregate of 50,608,500 shares of Common Stock (or pre-funded warrants in lieu thereof), or the Class A Warrants, and together with the Class B Warrants (as defined below), the Class A and Class B Warrants; and (iv) accompanying Class B warrants to purchase an aggregate of 50,608,500 shares of Common Stock (or pre-funded warrants in lieu thereof), or the Class B Warrants, and together with the Pre-Funded Warrants and the Class A Warrants, the Warrants. Each Share was offered and sold together with accompanying Class A and Class B Warrants each exercisable for one share of Common Stock at a combined offering price of $2.47 per Share and accompanying Class A and Class B Warrants, and each Pre-Funded Warrant was offered and sold together with accompanying Class A and Class B Warrants at a combined offering price of $2.4699 per Pre-Funded Warrant and accompanying Class A and Class B Warrants. The Company received net proceeds from the Offering, after deducting the underwriting discount and commissions and estimated offering expenses, of approximately $116.9 million. If all Warrants are exercised, the aggregate net proceeds to

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

the Company from the Offering, after deducting underwriting discounts and commissions and estimated offering expenses, are expected to be $341.7 million. See Note 10 for details on the Warrants.

**Note 10. Warrants**

In connection with the 2025 Offering, the Company issued 28,713,500 Pre-Funded Warrants, which have an initial exercise price per share of $0.0001, subject to certain adjustments. Each Pre-Funded Warrant can be exercised for one share of common stock. The Pre-Funded Warrants may be exercised at any time after the date of issuance by cash or cashless exercise, at the holder's election, until all of the Pre-Funded Warrants are exercised in full, subject to the Beneficial Ownership Limitation. The Pre-Funded Warrants do not expire.

In connection with the 2025 Offering, the Company issued 50,608,500 Class A Warrants that can be exercised either for one share of common stock at an initial exercise price per share of $2.22 or for one pre-funded warrant for an exercise price of $2.2199, subject to certain adjustments. Each Class A Warrant is exercisable immediately and will expire on the earlier of (i) 30 calendar days following the public release of nine-month median follow-up data from any expansion cohort in the Company's planned Phase 1b study of cemsidomide with elranatamab and (ii) the fifth anniversary of the date of issuance.

In connection with the 2025 Offering, the Company issued 50,608,500 Class B Warrants that can be exercised either for one share of common stock at an initial exercise price per share of $2.22 or for one pre-funded warrant for an exercise price of $2.2199, subject to certain adjustments. Each Class B Warrant is exercisable immediately and expire on the fifth anniversary of the date of issuance; provided that the Company may require the mandatory exercise of the Class B Warrants on or after the six-month anniversary of the date of issuance and so long as the per share closing price of the Common Stock on The Nasdaq Global Select Market on each of the ten consecutive trading days prior to the date of the Company's notice of mandatory exercise is above $6.66, subject to certain adjustments.

The Class A and Class B Warrants are exercisable solely by means of a cash exercise; provided that, if, at the time a holder exercises its Class A Warrants, there is no effective registration statement registering, with a current prospectus available for, the issuance of the shares of Common Stock underlying such Class A or Class B Warrant or prior consent has been provided by the Company, then a holder may, elect to exercise such warrant through cashless exercise pursuant to the terms of the applicable warrant agreement. If the Company consents to a cashless exercise for a holder of Class A or Class B Warrants, a similar allowance for cashless exercise shall be provided to all holders of the same class of warrants.

All Warrants are outstanding as of December 31, 2025 and are classified as equity.

**Note 11. Stock-based compensation**

***2015 Incentive Stock Option and Grant Plan***

On December 28, 2015, the Company's board of directors adopted the 2015 Incentive Stock Option and Grant Plan, or the 2015 Plan, and reserved 2,525,327 shares of common stock for issuance under this plan.

The 2015 Plan authorized the board of directors or a committee of the board to grant incentive stock options, nonqualified stock options and restricted stock awards to eligible employees, outside directors and consultants of the Company. Options granted under the 2015 Plan generally vest over a period of five or eight years with a cliff vesting at one year and quarterly vesting thereafter and options that lapse or are forfeited are available to be granted again. The contractual life of all options granted under the 2015 Plan is ten years from the date of grant.

***2020 Stock Option and Incentive Plan***

On September 8, 2020, the Company's board of directors adopted the C4 Therapeutics, Inc. 2020 Stock Option and Incentive Plan, or the 2020 Plan, which became effective on September 30, 2020. Upon adoption there were 6,567,144 shares of common stock reserved for issuance under the 2020 Plan. The Company's Board of Directors, the Compensation Committee of the Board of Directors, and, in certain contexts, the Chief Executive Officer of the Company are authorized to grant a broad range of stock-based awards under the 2020 Plan, including stock options, stock appreciation rights, or SARs, restricted stock awards, or RSAs, restricted stock units, or RSUs, performance awards and stock bonus awards to the Company's officers, employees, directors and other key persons, including consultants.

Following the effectiveness of the 2020 Plan, the Company ceased making grants under the 2015 Plan. However, the 2015 Plan continues to govern the terms and conditions of the outstanding awards granted under it. Shares of common stock subject to awards granted under the 2015 Plan that cease to be subject to such awards by forfeiture or otherwise after the termination of the 2015 Plan will be available for issuance under the 2020 Plan. As of December 31, 2025, there were 3,845,524 shares available for future grant under the 2020 Plan.

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

The 2020 Plan provides for an annual increase, to be added on the first day of each fiscal year, beginning with January 1, 2021 and continuing until the expiration of the 2020 Plan, equal to the lesser of (i) 5% of the outstanding shares of common stock on the immediately preceding December 31st, or (ii) lesser number of shares determined by the administrator of the 2020 Plan, which is the Company's Board of Directors or the Compensation Committee of the Board of Directors. On January 1, 2026, the annual increase for the 2020 Plan resulted in an additional 4,845,720 shares authorized for issuance being added to the 2020 Plan.

On March 7, 2024, the Company approved an option repricing program applicable to outstanding option awards granted to current employees of the Company under the 2020 Plan with an exercise price per share greater than or equal to $22.00. The repriced awards have new exercise prices of $11.88 per share for awards held by employees generally and $19.00 per share for awards held by members of the Company's senior leadership team. To receive the benefit of this reduced exercise price, holders of repriced option awards must not, prior to March 7, 2025, (i) voluntarily leave employment with the Company or (ii) exercise the repriced options. The repriced options otherwise remain on their existing terms and conditions as set forth in the 2020 Plan and applicable award agreements. For the years ended December 31, 2025 and 2024, the Company recorded an incremental non-cash charge of $0.4 million and $1.2 million, respectively, related to this option repricing. On October 7, 2024, the 2020 Plan was amended to prohibit the plan's administrator from reducing the exercise price of outstanding stock options or stock appreciation rights or effecting repricing through cancellation and re-grant or cancellation in exchange for cash or other awards without prior stockholder approval.

Stock-based compensation expense was as follows (in thousands):

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Stock-based compensation expense: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Research and development | $8977 | $12539 |
| &nbsp;&nbsp;&nbsp;&nbsp;General and administrative | 10122 | 17123 |
| Total stock-based compensation expense | $19099 | $29662 |

---

The following table summarizes the stock option activity under the Company's equity awards plans for the year ended December 31, 2025:

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Number of<br>Options** | **Weighted-Average<br>Exercise Price** | **Weighted-Average<br>Remaining<br>Contractual<br>Term (in years)** | **Aggregate<br>Intrinsic<br>Value<br>(in thousands)** |
| Outstanding as of December 31, 2024 | 11508150 | $12.00 | 7.70 | $2877 |
| &nbsp;&nbsp;&nbsp;&nbsp;Granted | 2172150 | 2.92 |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Exercised | (50000) | 2.15 |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Forfeited/expired | (769813) | 8.99 |  |  |
| Outstanding as of December 31, 2025 | 12860487 | $8.26 | 6.39 | $156 |
| Exercisable as of December 31, 2025 | 9026492 | $9.66 | 5.69 | $8 |
| Vested and expected to vest as of December 31, 2025 | 12860487 | $8.26 | 6.39 | $156 |

---

Other information related to the option activity of the Company was as follows:

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Weighted-average fair value of options granted | $2.33 | $5.59 |
| Intrinsic value of options exercised (in thousands) | $62 | $407 |

---

As of December 31, 2025, the unrecognized compensation cost related to outstanding options was $14.0 million, which is expected to be recognized over a weighted-average period of 2.2 years.

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

The following table summarizes assumptions used in the Black-Scholes option pricing model to determine the fair value of stock options granted to employees:

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Expected option life (years) | 5.50 - 6.08 | 5.50 - 6.11 |
| Risk-free interest rate | 3.97% - 4.43% | 3.56% - 4.46% |
| Expected volatility | 96.87% - 102.94% | 102.82% - 104.41% |
| Expected dividend yield | 0.00% | 0.00% |

---

***Performance-based restricted stock units***

In January and February 2022, the Company's Board of Directors authorized an issuance of 563,500 performance-based restricted stock units, or PSUs, to certain employees, including members of the Company's leadership team under the 2020 Plan. Vesting of the PSUs are contingent upon the determination of achievement of certain discovery and clinical milestones, or as specified market conditions are met. Upon vesting, each PSU converts automatically into one share of the Company's common stock.

The following table summarizes the activity under the Company's equity plans with respect to PSUs for the year ended December 31, 2025:

---

| | | |
|:---|:---|:---|
| | **Shares** | **Weighted-Average<br>Grant Date<br>Fair Value** |
| Outstanding as of December 31, 2024 | 98000 | $18.17 |
| &nbsp;&nbsp;&nbsp;&nbsp;Granted |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Vested |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Forfeited | (98000) | 18.17 |
| Outstanding as of December 31, 2025 |  | $— |

---

As of December 31, 2025, the remaining 98,000 unvested PSUs had been forfeited, as the term of the performance-based vesting period expired on February 28, 2025.

***Time-based restricted stock units***

The Company's Board of Directors authorized the issuance of time-based restricted stock units, or RSUs, to employees under the 2020 Plan. Vesting of the RSUs are contingent to time-based vesting conditions. These RSUs are valued on the grant date using the grant date market price of the underlying shares. Upon vesting, each RSU automatically converts into one share of the Company's common stock.

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

The following table summarizes the activity under the Company's equity plans with respect to RSUs for the year ended December 31, 2025:

---

| | | |
|:---|:---|:---|
| | **Shares** | **Weighted-Average<br>Grant Date<br>Fair Value** |
| Outstanding as of December 31, 2024 | 1505289 | $6.61 |
| &nbsp;&nbsp;&nbsp;&nbsp;Granted | 1954500 | 3.18 |
| &nbsp;&nbsp;&nbsp;&nbsp;Vested | (414192) | 6.48 |
| &nbsp;&nbsp;&nbsp;&nbsp;Forfeited | (226846) | 4.59 |
| Outstanding as of December 31, 2025 | 2818751 | $4.41 |

---

As of December 31, 2025, the unrecognized compensation cost related to outstanding RSUs was $9.1 million which is expected to be recognized over a weighted-average period of 2.7 years.

***Inducement grants***

On three separate dates in April, September, and October 2024, the Company's Board of Directors approved the grant of non-qualified stock options to purchase shares of the Company's common stock to three new employees. Options granted under these inducement grants vest over a period of four years with 25% of the award vesting on the first anniversary of the vesting start date and the balance vesting in equal quarterly installments thereafter.

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Number of<br>Options** | **Weighted-Average<br>Exercise Price** | **Weighted-Average<br>Remaining<br>Contractual<br>Term (in years)** | **Aggregate<br>Intrinsic<br>Value<br>(in thousands)** |
| Outstanding as of December 31, 2024 | 990360 | $5.11 | 9.28 | $40 |
| &nbsp;&nbsp;&nbsp;&nbsp;Granted |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Exercised |  |  |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Forfeited/expired | (146880) | 6.32 |  |  |
| Outstanding as of December 31, 2025 | 843480 | $4.90 | 8.27 | $— |
| Exercisable as of December 31, 2025 | 344137 | $4.52 | 8.07 | $— |
| Vested and expected to vest as of December 31, 2025 | 843480 | $4.90 | 8.27 | $— |

---

Other information related to the option activity of the Company was as follows:

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Weighted-average fair value of options granted | $— | $4.94 |

---

As of December 31, 2025, the unrecognized compensation cost related to outstanding options was $2.0 million, which is expected to be recognized over a weighted-average period of 2.4 years.

The following table summarizes assumptions used in the Black-Scholes option pricing model to determine the fair value of stock options granted to employees in the year ended December 31 2024:

---

| | |
|:---|:---|
| Expected option life (years) | 6.08 - 6.11 |
| Risk-free interest rate | 3.63% - 4.64% |
| Expected volatility | 103.11% - 103.85% |
| Expected dividend yield | 0.00% |

---

***2020 Employee Stock Purchase Plan***

In September 2020, the Company's Board of Directors adopted the C4 Therapeutics, Inc. 2020 Employee Stock Purchase Plan, or the 2020 ESPP. Eligible employees may authorize payroll deductions of up to 15% of their eligible compensation during an offering period. The Company may hold one or more offering periods each year during which employees will be

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

able to purchase shares under the 2020 ESPP. The Company issued 170,703 shares during the year ended December 31, 2025.

As of December 31, 2025, the Company had 2,652,916 shares available for future issuance under the 2020 ESPP. The 2020 ESPP provides for an annual increase to be added on the first day of each fiscal year, beginning with January 1, 2021 and continuing thereafter through January 1, 2030, equal to the lesser of (i) 1% of the outstanding shares of common stock on the immediately preceding December 31st, (ii) 656,714 shares, or (iii) lesser number of shares determined by the administrator of the 2020 ESPP. On January 1, 2026, the annual increase for the 2020 ESPP resulted in an additional 656,714 shares authorized for issuance being added to the 2020 ESPP.

**Note 12. Income taxes**

Income tax (benefit) expense consists of the following (in thousands):

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Current tax provision: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Current federal provision | $— | $— |
| &nbsp;&nbsp;&nbsp;&nbsp;Current state provision | 121 | 131 |
| &nbsp;&nbsp;&nbsp;&nbsp;Current foreign provision |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total current provision | 121 | 131 |
| Deferred tax provision: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Deferred federal provision |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Deferred state provision |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Deferred foreign provision |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total tax provision | $121 | $131 |

---

The amounts of income taxes paid (net of refunds received) disaggregated by federal, states and foreign were as follows for the tax years ended (in thousands):

---

| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Domestic | $— | $— |
| State | 131 | 76 |
| &nbsp;&nbsp;MA | 131 | 76 |
| Foreign |  |  |
| Total Income Taxes Paid | $131 | $76 |

---

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

***Tax rate reconciliation***

A reconciliation of the expected income tax (benefit) expense computed at the statutory federal rate to income taxes as reflected in the consolidated financial statements was as follows:

---

| | | |
|:---|:---|:---|
| | **December 31, 2025** | **%** |
| Expected provision at statutory federal rate | $(22025) | 21.0% |
| State and local income tax - net of federal benefit<sup>1</sup> | $95 | (0.1)% |
| Foreign tax effects | $— | —% |
| Effect of changes in tax laws or rates enacted in the current period | $— | —% |
| Effect of cross-border tax laws | $— | —% |
| Tax Credits |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;R&D credits | $(3008) | 2.8% |
| Change in valuation allowance | $23093 | (22.0)% |
| Nontaxable or nondeductible items |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation | $1910 | (1.8)% |
| &nbsp;&nbsp;&nbsp;&nbsp;Other permanent difference & true up | $52 | —% |
| Change in unrecognized tax benefits | $— | —% |
| Others | $4 | —% |
| &nbsp;&nbsp;&nbsp;**Total Income Tax Provision** | $121 | (0.1)% |

---

<sup>1</sup> State taxes in Massachusetts made up the majority (greater than 50%) of the tax effect in this category.

The Company's effective tax rate as of December 31, 2025, was primarily driven by income taxes related to the C4T Securities Corporation, a Massachusetts security corporation. This resulted in a tax provision of $0.1 million and effective tax rate of (0.1)%.

As previously disclosed for the tax year ended December 31, 2024, prior to the adoption of ASU 2023-09, the effective income tax rate differs from the statutory federal income tax rate as follows:

---

| | |
|:---|:---|
| | **December 31, 2024** |
| Income tax benefit computed at federal statutory tax rate | 21.0% |
| Stock-based compensation | (4.2)% |
| State tax - net of federal | 6.4% |
| State credits | 1.3% |
| Federal credits | 3.0% |
| Valuation allowance | (26.6)% |
| Withholding Tax | —% |
| Other permanent differences | (1.0)% |
| Total | (0.1)% |

---

***Significant components of deferred taxes***

Deferred income taxes reflect the net tax effects of (a) temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes and (b) operating losses and tax

------

**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

credit carryforwards. Significant components of the Company's deferred tax assets and deferred tax liabilities were as follows (in thousands):

---

| | | |
|:---|:---|:---|
| | **As of December 31,** | **As of December 31,** |
| | **2025** | **2024** |
| Deferred tax assets: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Net operating loss carryforwards | $100151 | $62429 |
| &nbsp;&nbsp;&nbsp;&nbsp;Capitalized Research and Experimental Expenditures | 50877 | 68370 |
| &nbsp;&nbsp;&nbsp;&nbsp;R&D and investment tax credits | 27984 | 23646 |
| &nbsp;&nbsp;&nbsp;&nbsp;Deferred revenue | 6160 | 6671 |
| &nbsp;&nbsp;&nbsp;&nbsp;Stock-based compensation | 13684 | 11003 |
| &nbsp;&nbsp;&nbsp;&nbsp;Operating lease liability | 17395 | 19083 |
| &nbsp;&nbsp;&nbsp;&nbsp;Capitalized start-up costs | 230 | 392 |
| &nbsp;&nbsp;&nbsp;&nbsp;Other | 22 | 25 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total gross deferred tax assets | 216503 | 191619 |
| Deferred tax liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Right-of-use asset | (11754) | (16697) |
| &nbsp;&nbsp;&nbsp;&nbsp;Fixed assets | (1112) | (1382) |
| &nbsp;&nbsp;&nbsp;&nbsp;Total deferred tax liabilities | (12866) | (18079) |
| Less: valuation allowance | (203637) | (173540) |
| Net deferred taxes | $— | $— |

---

The Company has evaluated the positive and negative evidence bearing upon the realizability of the deferred tax assets. As of December 31, 2025 and 2024, based on the Company's historical operating losses, the Company has concluded that it is more-likely-than-not that the benefit of its deferred tax assets will not be realized. Accordingly, the Company has provided a full valuation allowance for the deferred tax assets as of December 31, 2025 and 2024. The valuation allowance for deferred tax assets as of December 31, 2025 and 2024 was $203.6 million and $173.5 million, respectively. The net valuation allowance increased $30.0 million and $28.0 million during the years ended December 31, 2025 and 2024, respectively. The change during the year ended December 31, 2025 was primarily due to the increase in net operating loss, or NOL, and tax credits carryforward, and a decrease in capitalization of research and experimental expenditures.

As of December 31, 2025 and 2024, the Company had $359.6 million and $222.8 million gross United States federal NOL carryforwards, respectively, which may be available to offset future taxable income. The Tax Cuts and Jobs Act, or TCJA, which was enacted in December 2017, will generally allow federal losses generated after 2017 to be carried over indefinitely, but will generally limit the NOL deduction to the lesser of the NOL carryover or 80% of a corporation's taxable income (subject to Section 382 of the Internal Revenue Code of 1986, as amended, or IRC). In addition, there will be no carryback for losses generated after 2017. Losses generated prior to 2018 will generally be deductible to the extent of the lesser of a corporation's NOL carryover or 100% of a corporation's taxable income and be available for twenty years from the period the loss was generated. For U.S. federal income tax purposes, the Company has federal NOLs generated after 2017 of $359.6 million, which do not expire. The Company does not have any available NOLs generated prior to 2019 as they were fully utilized in 2019. The Coronavirus Aid, Relief and Economic Security Act, or CARES Act, temporarily allows the Company to carryback NOLs arising in 2018, 2019 and 2020 to the five prior tax years. In addition, NOLs generated in these years could fully offset prior year taxable income without the 80% of the taxable income limitation under the TCJA.

As of December 31, 2025 and 2024, the Company has total gross United States state NOL carryforwards of $474.9 million and $338.3 million, respectively, which may be available to offset future taxable income that expire at various dates through 2045.

As of December 31, 2025 and 2024, the Company has United States federal research credit carryforwards of $18.8 million and $15.8 million, respectively, which are available to offset future federal income tax liabilities, which expire at various dates through 2045. As of December 31, 2025 and 2024, the Company has United States state credit carryforwards of $9.2 million and $7.8 million, respectively, which are available to reduce future tax liabilities which expire at various dates through 2040.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

NOL and tax credit carryforwards may become subject to an annual limitation in the event of certain cumulative changes in the ownership interest of significant stockholders over a three-year period in excess of 50%, as defined under Sections 382 and 383 of the IRC, respectively, as well as similar state provisions. This could limit the amount of tax attributes that can be utilized annually to offset future taxable income or tax liabilities. The amount of the annual limitation is determined based on the value of the Company immediately prior to the ownership change. Subsequent ownership changes may further affect the limitation in future years. In 2022, the Company completed a study of ownership changes from inception through December 31, 2020, to assess whether an ownership change has occurred or whether there have been multiple ownership changes since its formation. The result of this study indicated that the Company experienced ownership changes as defined by Section 382 of the Internal Revenue Code, however there are no NOL carryforwards that will be limited and expire unused as a result of such ownership changes. Given the continued loss position, the Company has not currently undertaken an analysis for IRC Section 382 purposes of any activities post December 31, 2020. A full valuation allowance has been provided against the Deferred Tax Assets related to the Company's NOL and tax credit carryforwards and, if an adjustment is required, this adjustment would be offset by an adjustment to the valuation allowance.

The Company will recognize interest and/or penalties related to unrecorded tax benefits in income tax expense as they arise. As of December 31, 2025 and 2024, the Company had no accrued interest or penalties related to unrecorded tax benefits.

The Company files income tax returns as prescribed by the tax laws of the jurisdictions in which it operates. The federal and state income tax returns are generally subject to tax examinations for the tax years ended December 31, 2022 through present. To the extent that the Company has tax attribute carryforwards, the tax years in which the attributes were generated may still be adjusted upon examination by the Internal Revenue Services or State tax authorities to the extent utilized in a future period. The Company is not currently under examination by any tax authorities.

**Note 13. Net loss per share**

As described in Note 2, *Summary of significant accounting policies*, for periods in which the Company reports a net loss, potentially dilutive securities have been excluded from the computation of diluted net loss per share as their effects would be anti-dilutive. Therefore, the weighted average number of common shares outstanding used to calculate both basic and diluted net loss per share is the same. The Company excluded the following potential common shares presented based on amounts outstanding at period end, from the computation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect:

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| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Class A Warrants | 50608500 |  |
| Class B Warrants | 50608500 |  |
| Options to purchase common stock | 13703967 | 11849611 |
| Restricted Stock Units | 2818751 | 1443319 |
|  | 117739718 | 13292930 |

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Holders of the Company's Class A and Class B Warrants participate in dividends on an as-converted basis when declared on common stock. As a result, both Class A and Class B Warrants meet the definition of a participating security, which requires the application of the two-class method to compute both basic and diluted net income per share. The two-class method is an earnings allocation formula that treats participating securities as having rights to earnings that would otherwise have been available to common stockholders. In addition, as the Class A and Class B Warrants are participating securities, it is required to calculate diluted net income per share under the if-converted method in addition to the two-class method and utilize the most dilutive result. In periods where there is a net loss, no allocation of undistributed net loss to stockholders is performed as the holders of our Class A and Class B Warrants are not contractually obligated to participate in the Company's losses.

Basic net loss per share is computed by dividing net loss by the weighted average number of shares of Common Stock outstanding during the period. Potential common shares that are issuable for little or no cash consideration, such as the Company's Pre-Funded Warrants issued with a de minimis exercise price of $0.0001 per share, respectively, are considered outstanding common shares which are included in the calculation of basic and diluted net income (loss) per share in all circumstances. Diluted earnings per share is computed using the weighted average number of Common Stock and, if

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

dilutive, potential Common Stock outstanding during the period. Potential Common Stock consists of the incremental Common Stock issuable upon the exercise of stock options and warrants (in thousands, except share and per share data):

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| | | |
|:---|:---|:---|
| | **Years Ended December 31,** | **Years Ended December 31,** |
| | **2025** | **2024** |
| Numerator: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Net loss —basic and diluted | $(104994) | $(105316) |
| Denominator: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Weighted-average common stock outstanding | 76915757 | 69372993 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Weighted average of pre-funded warrants exercisable for nominal consideration | 5978702 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Weighted-average number of shares—basic and diluted | 82894459 | 69372993 |
| Net loss per share —basic and diluted | $(1.27) | $(1.52) |

---

**Note 14. Defined contribution plan**

The Company has a 401(k) retirement plan, the 401(k) Plan, whereby all employees may contribute up to 90% of their eligible compensation, up to the maximum allowable amount set by the Internal Revenue Service. The Company matches 100% of contributions to the 401(k) Plan up to 3%, and matches an additional 50% of contributions up to 5%, for a total potential match of 4% for each employee. During each of the years ended December 31, 2025 and 2024, the Company contributed approximately $1.1 million and $0.9 million, respectively, to the 401(k) Plan.

**Note 15. Commitments and contingencies**

***Legal proceedings***

The Company is not currently party to any material legal proceedings. At each reporting date, the Company evaluates whether or not a potential loss amount or a potential range of loss is probable and reasonably estimable under the provisions of the authoritative guidance that addresses accounting for contingencies. The Company expenses as incurred the costs related to such legal proceedings.

**Note 16. Restructuring**

On January 9, 2024, the Company implemented a plan to reduce operating costs and better align its workforce with the needs of its business. Under the cost reduction plan, the Company reduced its workforce by approximately 30%. The Company incurred one-time restructuring charges of $2.4 million, including employee severance, benefits and related termination costs. The termination costs were fully paid by December 31, 2024.

**Note 17. Segment Reporting**

The Company operates as one operating segment. The Company's chief operating decision maker, or CODM, is its chief executive officer, who reviews financial information presented on a consolidated basis. The CODM manages and allocates resources to the operations of the Company on a total company basis by assessing the overall level of resources available and how to best deploy these resources across functions and research and development projects that are in line with our long-term company-wide strategic goals. Consistent with this decision-making process, the CODM uses operating expenses to monitor budget versus actual results for purposes of evaluating performance and to make decisions about the allocation of resources. The CODM does not utilize revenue in their decision-making process as a significant amount of the revenues recognized by the Company are derived from the upfront payments received from our collaboration partners (see Footnote 8 for further details).

The financial metrics used by the CODM to make key operating decisions consist of development, research, and general and administrative expenses.

The following table presents selected financial information with respect to the Company's single operating segment for the years ended December 31, 2025 and 2024.

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**<u>[**Table of Contents**](#i5011ba653e214f14a9bed9a7ac77aa67_7)</u>**

**C4 Therapeutics, Inc.**

**Notes to Consolidated Financial Statements — Continued**

---

| | | |
|:---|:---|:---|
| (in thousands) | **Year Ended December 31,** | **Year Ended December 31,** |
|  | **2025** | **2024** |
| Operating expenses: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Development expenses | 52099 | 59003 |
| &nbsp;&nbsp;&nbsp;&nbsp;Research expenses | 33495 | 30815 |
| &nbsp;&nbsp;&nbsp;&nbsp;General and administrative | 35743 | 33281 |
| Segment operating expenses | 121337 | 123099 |
| Reconciliation of profit or loss |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Non-operating income | (10228) | (14298) |
| &nbsp;&nbsp;&nbsp;&nbsp;Adjustments or reconciling items<sup>(1)</sup> | (6115) | (3485) |
| Consolidated net loss | $(104994) | $(105316) |

---

<sup>(1)</sup> The reconciling items include revenue, stock-based compensation expense, and impairment of long-lived assets expense for the year ended December 31, 2025. The reconciling items include revenue, stock-based compensation expense, and restructuring expense for the year ended December 31, 2024.

## Exhibit 4.5

**Exhibit 4.5**

**DESCRIPTION OF CAPITAL STOCK**

The summary of the general terms and provision of the registered securities of C4 Therapeutics, Inc. ("**C4T**," the "**Company**," "**we**," or "**our**") set forth below does not purport to be complete and is subject to and qualified in its entirety by reference to our Fifth Amended and Restated Certificate of Incorporation, as amended (our "**certificate of incorporation**") and our Second Amended and Restated By-laws (our "**by-laws**"), each of which is incorporated by reference as an exhibit to our most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission. We encourage you to read our charter documents and the applicable provisions of the General Corporation Law of the State of Delaware (the "**DGCL**") for additional information.

**General**

Our authorized capital stock consists of 300,000,000 shares of common stock, par value $0.0001 per share, and 10,000,000 shares of preferred stock, par value $0.0001 per share, all of which shares of preferred stock are undesignated.

**Common Stock**

The holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of the stockholders. The holders of our common stock do not have any cumulative voting rights. Holders of our common stock are entitled to receive ratably any dividends declared by our board of directors out of funds legally available for that purpose, subject to any preferential dividend rights of any outstanding preferred stock. Our common stock has no preemptive rights, conversion rights or other subscription rights or redemption or sinking fund provisions.

In the event of our liquidation, dissolution or winding up, holders of our common stock will be entitled to share ratably in all assets remaining after payment of all debts and other liabilities and any liquidation preference of any outstanding preferred stock.

Our Common Stock is listed on The Nasdaq Global Select Market under the symbol "**CCCC**."

The transfer agent and registrar for our Common Stock is Computershare Trust Company, N.A.

**Preferred Stock**

Our board of directors has the authority, without further action by our stockholders, to issue up to 10,000,000 shares of preferred stock in one or more series and to fix the rights, preferences, privileges and restrictions thereof. These rights, preferences and privileges could include dividend rights, conversion rights, voting rights, terms of redemption, liquidation preferences, sinking fund terms and the number of shares constituting, or the designation of, such series, any or all of which may be greater than the rights of common stock. The issuance of our preferred stock could adversely affect the voting power of holders of common stock and the likelihood that such holders will receive dividend payments and payments upon our liquidation. In addition, the issuance of preferred stock could have the effect of delaying, deferring or preventing a change in control of our company or other corporate action. No shares of preferred stock are currently outstanding and we have no present plan to issue any shares of preferred stock.

**Options**

As of December 31, 2025, options to purchase 13,703,967 shares of common stock at a weighted-average exercise price of $8.05 per share were outstanding under our 2015 Stock Option and Grant Plan, as amended, and our 2020 Stock Option and Incentive Plan (the "**2020 Plan**") and pursuant to inducement awards.

**Restricted Stock**

As of December 31, 2025, 2,818,751 restricted stock units were outstanding under our 2020 Plan.

**Warrants**

In October 2025, we issued 28,713,500 pre-funded warrants (the "**Pre-Funded Warrants**"), which have an initial exercise price per share of $0.0001, subject to certain adjustments. Each Pre-Funded Warrant can be exercised for one share of common stock. The Pre-Funded Warrants may be exercised at any time after the date of issuance by

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cash or cashless exercise, at the holder's election, until all of the Pre-Funded Warrants are exercised in full, subject to the Beneficial Ownership Limitation (as defined below). The Pre-Funded Warrants do not expire.

In October 2025, we issued 50,608,500 Class A warrants (the "**Class A Warrants**") that can be exercised either for one share of common stock at an initial exercise price per share of $2.22 or for one pre-funded warrant for an exercise price of $2.2199, subject to certain adjustments. Each Class A Warrant is exercisable immediately and will expire on the earlier of (i) 30 calendar days following the public release of nine-month median follow-up data from any expansion cohort in the Company's planned Phase 1b study of cemsidomide with elranatamab and (ii) the fifth anniversary of the date of issuance.

In October 2025, we issued 50,608,500 warrants (the "**Class B Warrants**," and together with the Pre-Funded Warrants and the Class A Warrants, the "Warrants," and the common stock issuable upon exercise of the Warrants, the "**Warrant Shares**") that can be exercised either for one share of common stock at an initial exercise price per share of $2.22 or for one pre-funded warrant for an initial exercise price of $2.2199, subject to certain adjustments. Each Class B Warrant is exercisable immediately and expires on the fifth anniversary of the date of issuance; provided that the Company may require the mandatory exercise of the Class B Warrants on or after the six-month anniversary of the date of issuance and so long as the per share closing price of the Company's common stock on each of the ten consecutive trading days prior to the date of the Company's notice of mandatory exercise is above $6.66, subject to certain adjustments.

The Class A Warrants and Class B Warrants are exercisable solely by means of a cash exercise; provided that, if, at the time a holder exercises its Class A Warrants or Class B Warrants, there is no effective registration statement registering, with a current prospectus available for, the issuance of the shares of common stock underlying such Class A Warrant or Class B Warrant or prior consent has been provided by the Company, then a holder may elect to exercise such Warrant through cashless exercise pursuant to the terms of the applicable warrant agreement. If the Company consents to a cashless exercise for a holder of Class A Warrants or Class B Warrants, a similar allowance for cashless exercise shall be provided to all holders of the same class of Warrants.

Under the Warrants, the Company may not effect the exercise of any Warrant, and a holder will not be entitled to exercise any portion of any Warrant (i) if immediately prior to the exercise, the holder (together with its affiliates), beneficially owns an aggregate number of shares of common stock greater than 4.99% or 9.99%, as applicable (the "**Maximum Percentage**") of the total number of issued and outstanding shares of common stock of the Company without taking into account any Warrant Shares or (ii) to the extent that immediately following the exercise, the holder (together with its affiliates) would beneficially own in excess of the Maximum Percentage of the number of shares of common stock outstanding immediately after giving effect to the issuance of such shares of common stock, which such percentage may be changed at the holder's election to a higher or lower percentage not in excess of 19.99% upon 61 days' notice to the Company (the "**Beneficial Ownership Limitation**"). In the event that the Company requires the mandatory exercise of the Class B Warrants, to the extent that the holder would own more than the Beneficial Ownership Limitation, the holder would receive a pre-funded warrant for the number of shares of common stock which would otherwise cause the holder to exceed the Beneficial Ownership Limitation.

The exercise price of the Warrants and the number of shares of common stock issuable upon exercise of the Warrants are subject to appropriate adjustment in the event of stock dividends, stock splits, reorganizations or similar events affecting the Company's common stock. Holders of the Warrants are entitled to receive dividends or other distributions on an as-converted basis when dividends are declared on or other distributions are made with respect to the Company's common stock. The Warrants include certain rights upon "fundamental transactions" as described in the respective Warrants, including the right of the holders thereof to receive from the Company or a successor entity the same type or form of consideration (and in the same proportion) that is being offered and paid to the holders of common stock in such fundamental transaction in the amount of the Black Scholes Value (as described in such Warrants) of the unexercised portion of the applicable Warrants on the date of the consummation of such fundamental transaction.

The foregoing is only a brief description of the terms of each of the Warrants, does not purport to be a complete statement of the rights and obligations of the parties thereto and is qualified in its entirety by reference to the form of Pre-Funded Warrant, form of Class A Warrant and form of Class B Warrant that are filed as Exhibit 4.1, Exhibit 4.2 and Exhibit 4.3, respectively, to the Company's Current Report on Form 8-K filed with the SEC on October 16, 2025 in connection with the October 2025 offering.

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**Anti-Takeover Effects of Delaware Law and Certain Provisions of our Certificate of Incorporation and Amended and Restated By-laws**

Our certificate of incorporation and by-laws include a number of provisions that may have the effect of delaying, deferring or preventing another party from acquiring control of us and encouraging persons considering unsolicited tender offers or other unilateral takeover proposals to negotiate with our board of directors rather than pursue non-negotiated takeover attempts. These provisions include the items described below.

***Classified Board***

Our certificate of incorporation provides for the division of our board of directors into three classes serving staggered three-year terms, with one class being elected each year. Our certificate of incorporation also provides that directors may be removed only for cause and then only by the affirmative vote of the holders of two-thirds or more of the shares then entitled to vote at an election of directors. Furthermore, any vacancy on our board of directors, however occurring, including a vacancy resulting from an increase in the size of our board, may only be filled by the affirmative vote of a majority of our directors then in office even if less than a quorum. The classification of directors, together with the limitations on removal of directors and treatment of vacancies, has the effect of making it more difficult for stockholders to change the composition of our board of directors.

***No Written Consent of Stockholders***

Our certificate of incorporation provides that all stockholder actions are required to be taken by a vote of the stockholders at an annual or special meeting and that stockholders may not take any action by written consent in lieu of a meeting. This limit may lengthen the amount of time required to take stockholder actions and would prevent the amendment of our by-laws or removal of directors by our stockholders without holding a meeting of stockholders.

***Meetings of Stockholders***

Our certificate of incorporation and by-laws provide that only a majority of the members of our board of directors then in office may call special meetings of stockholders and only those matters set forth in the notice of the special meeting may be considered or acted upon at a special meeting of stockholders. Our by-laws limit the business that may be conducted at an annual meeting of stockholders to those matters properly brought before the meeting.

***Advance Notice Requirements***

Our by-laws establish advance notice procedures with regard to stockholder proposals relating to the nomination of candidates for election as directors or new business to be brought before meetings of our stockholders. These procedures provide that notice of stockholder proposals must be timely given in writing to our corporate secretary prior to the meeting at which the action is to be taken. Generally, to be timely, notice must be received at our principal executive offices not less than 90 days nor more than 120 days prior to the first anniversary date of the annual meeting for the preceding year. Our by-laws specify the requirements as to form and content of all stockholders' notices. These requirements may preclude stockholders from bringing matters before the stockholders at an annual or special meeting.

***Amendment to Certificate of Incorporation and By-laws***

Any amendment of our certificate of incorporation must first be approved by a majority of our board of directors and, if required by law or our certificate of incorporation, must thereafter be approved by a majority of the outstanding shares entitled to vote on the amendment and a majority of the outstanding shares of each class entitled to vote thereon as a class, except that the amendment of the provisions relating to stockholder action, board composition, limitation of liability and the amendment of our by-laws and certificate of incorporation must be approved by not less than two-thirds of the outstanding shares entitled to vote on the amendment and not less than two-thirds of the outstanding shares of each class entitled to vote thereon as a class. Our by-laws may be amended by the affirmative vote of a majority of the directors then in office, subject to any limitations set forth in the by-laws; and may also be amended by the affirmative vote of at least two-thirds of the outstanding shares entitled to vote on the amendment or, if our board of directors recommends that the stockholders approve the amendment, by the affirmative vote of the majority of the outstanding shares entitled to vote on the amendment, in each case voting together as a single class.

***Undesignated Preferred Stock***

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Our certificate of incorporation provides for 10,000,000 authorized shares of preferred stock. The existence of authorized but unissued shares of preferred stock may enable our board of directors to discourage an attempt to obtain control of us by means of a merger, tender offer, proxy contest or otherwise. For example, if in the due exercise of its fiduciary obligations, our board of directors were to determine that a takeover proposal is not in the best interests of our stockholders, our board of directors could cause shares of preferred stock to be issued without stockholder approval in one or more private offerings or other transactions that might dilute the voting or other rights of the proposed acquirer or insurgent stockholder or stockholder group. In this regard, our certificate of incorporation grants our board of directors broad power to establish the rights and preferences of authorized and unissued shares of preferred stock. The issuance of shares of preferred stock could decrease the amount of earnings and assets available for distribution to holders of shares of common stock. The issuance may also adversely affect the rights and powers, including voting rights, of these holders and may have the effect of delaying, deterring or preventing a change in control of us.

***Delaware Anti-Takeover Statute***

We are subject to the provisions of Section 203 of the Delaware General Corporation Law. In general, Section 203 prohibits a publicly held Delaware corporation from engaging in a "**business combination**" with an "**interested stockholder**" for a three-year period following the time that this stockholder becomes an interested stockholder, unless the business combination is approved in a prescribed manner. Under Section 203, a business combination between a corporation and an interested stockholder is prohibited unless it satisfies one of the following conditions:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• before the stockholder became interested, our board of directors approved either the business combination or the transaction that resulted in the stockholder becoming an interested stockholder;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, excluding for purposes of determining the voting stock outstanding, shares owned by persons who are directors and also officers, and employee stock plans, in some instances, but not the outstanding voting stock owned by the interested stockholder; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• at or after the time the stockholder became interested, the business combination was approved by our board of directors and authorized at an annual or special meeting of the stockholders by the affirmative vote of at least two-thirds of the outstanding voting stock that is not owned by the interested stockholder.

Section 203 defines a business combination to include:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any merger or consolidation involving the corporation and the interested stockholder;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any sale, transfer, lease, pledge, exchange, mortgage or other disposition involving the interested stockholder of 10% or more of the assets of the corporation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• subject to exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the interested stockholder; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the receipt by the interested stockholder of the benefit of any loans, advances, guarantees, pledges or other financial benefits provided by or through the corporation.

In general, Section 203 defines an interested stockholder as any entity or person beneficially owning 15% or more of the outstanding voting stock of the corporation and any entity or person affiliated with or controlling or controlled by the entity or person.

**Choice of Forum**

Our by-laws provide that, unless we consent in writing to the selection of an alternative form, the Court of Chancery of the State of Delaware will be the sole and exclusive forum for state law claims for (i) any derivative action or proceeding brought on our behalf; (ii) any action asserting a claim of breach of a fiduciary duty or other wrongdoing by any of our directors, officers, employees or agents to us or our stockholders; (iii) any action asserting a claim arising out of or pursuant to any provision of the General Corporation Law of the State of Delaware or our certificate of incorporation or by-laws; and (iv) any action asserting a claim governed by the internal affairs doctrine; *provided*, *however*, that this choice of forum provision does not apply to any causes of action arising under the Securities Act

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of 1933, as amended (the "**Securities Act**") or the Exchange Act of 1934, as amended. Our by-laws further provide that, unless we consent in writing to an alternative forum, the United States District Court for the District of Massachusetts will be the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act. Our by-laws also provide that any person or entity purchasing or otherwise acquiring any interest in shares of our capital stock will be deemed to have notice of and to have consented to this choice of forum provision. We recognize that the forum selection clause in our by-laws may impose additional litigation costs on stockholders in pursuing any such claims, particularly if the stockholders do not reside in or near the State of Delaware or the Commonwealth of Massachusetts, as applicable. Additionally, the forum selection clause in our by-laws may limit our stockholders' ability to bring a claim in a forum that they find favorable for disputes with us or our directors, officers or employees, which may discourage such lawsuits against us and our directors, officers and employees even though an action, if successful, might benefit our stockholders. The Court of Chancery of the State of Delaware or the United States District Court for the District of Massachusetts may also reach different judgments or results than would other courts, including courts where a stockholder considering an action may be located or would otherwise choose to bring the action, and such judgments may be more or less favorable to us than our stockholders.

## Exhibit 10.18

![](parsuagreementfebruary20001.jpg)

ACTIVE/204083388.2 PERFORMANCE-ACCELERATED RESTRICTED STOCK UNIT AWARD AGREEMENT FOR COMPANY EMPLOYEES UNDER THE C4 THERAPEUTICS, INC. 2020 STOCK OPTION AND INCENTIVE PLAN (PERFORMANCE-BASED ACCELERATED VESTING) Name of Grantee: No. of Performance-Accelerated Restricted Stock Units Grant Date: February 13, 2026 Pursuant to the C4 Therapeutics, Inc. 2020 Stock Option and Incentive Plan as amended through the date hereof (the "Plan"), C4 Therapeutics, Inc. (the "Company") hereby grants an award of the number of performance-accelerated Restricted Stock Units ("PARSUs") listed above (an "Award") to the Grantee named above. Each PARSU shall relate to one share of Common Stock, par value $0.0001 per share (the "Stock") of the Company. 1. Restrictions on Transfer of Award. This Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of by the Grantee, and any shares of Stock issuable with respect to the Award may not be sold, transferred, pledged, assigned or otherwise encumbered or disposed of until (i) the PARSUs have vested as provided in Paragraph 2 of this Agreement and (ii) shares of Stock have been issued to the Grantee in accordance with the terms of the Plan and this Agreement. 2. Vesting of PARSUs. The restrictions and conditions of Paragraph 1 of this Agreement shall lapse on the vesting date or dates specified in the following schedule (each a "Vesting Date" and, collectively, the "Vesting Dates") so long as the Grantee maintains a Service Relationship with the Company or a Subsidiary on each such Vesting Date. If a series of Vesting Dates is specified, then the restrictions and conditions in Paragraph 1 shall lapse only with respect to the number of PARSUs specified as vested on each such date. In order for accelerated vesting to occur under this Award, each of the performance milestones (the "Performance Milestones") set forth below must be determined to have been achieved on or prior to February 13, 2029 (the "Outside Vesting Date").

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![](parsuagreementfebruary20002.jpg)

ACTIVE/204083388.2 2 Incremental Percentage of PARSUs Vested Performance Milestone 15% of Award The execution of definitive agreements for two new Discovery-focused collaborations 20% of Award Determination by the Company of the dose of cemsidomide that will enable future clinical development of cemsidomide in combination with elranatamab, based on data arising out of the Company's current Phase 1b clinical trial 30% of Award Completion of enrollment in the Company's Phase 2 MOMENTUM clinical trial evaluating cemsidomide in combination with dexamethasone in patients in the 4th line or later 15% of Award The nomination of a development candidate from the Company's current internal pipeline 20% of Award The filing with the U.S. Food and Drug Administration of a New Drug Application for cemsidomide The achievement of any of the Performance Milestones shall be determined by the Organization, Leadership and Compensation Committee (the "OLCC") in its sole discretion. Notwithstanding anything to the contrary in the foregoing, if any of the PARSUs has not vested on or prior to the Outside Vesting Date, subject to Section 3 below, all such unvested PARSUs shall be deemed to have vested on the Outside Vesting Date. The OLCC may at any time accelerate the vesting schedule specified in this Paragraph 2. 3. Termination of Service Relationship. If the Grantee's employment or other Service Relationship with the Company and its Subsidiaries terminates for any reason (including death or disability) prior to the satisfaction of the vesting conditions set forth in Paragraph 2 above, any PARSUs that have not vested as of such date shall automatically and without notice terminate and be forfeited, and neither the Grantee nor any of his or her successors, heirs, assigns, or personal representatives will thereafter have any further rights or interests in such unvested PARSUs. 4. Issuance of Shares of Stock. As soon as practicable following each Vesting Date (but in no event later than two and one-half months after the end of the year in which the Vesting Date occurs), the Company shall issue to the Grantee the number of shares of Stock equal to the aggregate number of PARSUs that have vested pursuant to Section 2 of this Agreement on such date and the Grantee shall thereafter have all the rights of a stockholder of the Company with respect to such shares. 5. Incorporation of Plan. Notwithstanding anything herein to the contrary, this Agreement shall be subject to and governed by all the terms and conditions of the Plan, including

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![](parsuagreementfebruary20003.jpg)

ACTIVE/204083388.2 3 the powers of the Administrator set forth in Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the meaning specified in the Plan, unless a different meaning is specified herein. 6. Tax Withholding. The Grantee shall, not later than the date as of which the receipt of this Award becomes a taxable event for Federal income tax purposes, pay to the Company or make arrangements satisfactory to the Administrator for payment of any Federal, state, and local taxes required by law to be withheld on account of such taxable event. The Company shall have the authority to cause the required tax withholding obligation to be satisfied, in whole or in part, by either withholding from shares of Stock to be issued to the Grantee a number of shares of Stock with an aggregate Fair Market Value that would satisfy the withholding amount due or selling from the number of shares of Stock to be issued to the Grantee, the number of shares of Stock necessary to satisfy the Federal, state and local taxes required by law to be withheld from the Grantee on account of such transfer. 7. Section 409A of the Code. This Agreement shall be interpreted in such a manner that all provisions relating to the settlement of the Award are exempt from the requirements of Section 409A of the Code as "short-term deferrals" as described in Section 409A of the Code. 8. No Obligation to Continue Service Relationship. Neither the Company nor any Subsidiary is obligated by or as a result of the Plan or this Agreement to continue the Grantee in employment or other Service Relationship with the Company or a Subsidiary, and neither the Plan nor this Agreement shall interfere in any way with the right of the Company or any Subsidiary to terminate the employment or other Service Relationship with the Company or a Subsidiary of the Grantee at any time. 9. Integration. This Agreement constitutes the entire agreement between the parties with respect to this Award and supersedes all prior agreements and discussions between the parties concerning such subject matter. For purposes of clarity, this Agreement expressly does not supersede the Employee Confidentiality and Assignment Agreement (or other agreement with similar title) into which the Grantee may have entered in connection with the Grantee's commencement of employment with the Company. The Grantee's obligations under this Agreement are in addition to the obligations outlined in such agreements. To the extent any obligation in the Employee Confidentiality and Assignment Agreement (or other agreement with similar title) is found to conflict with Grantee's obligations hereunder, this Agreement shall govern. 10. Data Privacy Consent. In order to administer the Plan and this Agreement and to implement or structure future equity grants, the Company, its subsidiaries and affiliates and certain agents thereof (together, the "Relevant Companies") may process any and all personal or professional data, including but not limited to Social Security or other identification number, home address and telephone number, date of birth and other information that is necessary or desirable for the administration of the Plan and/or this Agreement (the "Relevant Information"). By entering into this Agreement, the Grantee (i) authorizes the Company to collect, process, register and transfer to the Relevant Companies all Relevant Information; (ii) waives any privacy rights the Grantee may have with respect to the Relevant Information; (iii) authorizes the Relevant Companies to store and transmit such information in electronic form; and (iv) authorizes the transfer of the Relevant Information to any jurisdiction in which the

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![](parsuagreementfebruary20004.jpg)

ACTIVE/204083388.2 4 Relevant Companies consider appropriate. The Grantee shall have access to, and the right to change, the Relevant Information. Relevant Information will only be used in accordance with applicable law. 11. Notices. Notices hereunder shall be mailed or delivered to the Company at its principal place of business and shall be mailed or delivered to the Grantee at the address on file with the Company or, in either case, at such other address as one party may subsequently furnish to the other party in writing. 12. Electronic Signature. The Company and Grantee agree and acknowledge that this Agreement has been electronically signed by the Company as of the date presented to Grantee and must be electronically signed by the Grantee via E\*TRADE's on-line acceptance process within the timeframe described below. The parties further agree that the Grantee's acceptance of this Agreement through E\*TRADE's online acceptance process and pursuant to the Company's instructions to the Grantee shall constitute an electronic signature and shall have the same import and effect as if the Grantee signed the Agreement by hand under seal. C4 THERAPEUTICS, INC. By: Title: The foregoing Agreement is hereby accepted and the terms and conditions thereof hereby agreed to by the undersigned. Executing this this Agreement via electronic signature pursuant to the Company's instructions to the Grantee (including through an online acceptance process) is acceptable. Dated: Grantee's Signature Grantee's name and address:

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## Exhibit 21.1

**Exhibit 21.1**

**SUBSIDIARIES**

---

| | |
|:---|:---|
| **Subsidiary** | **Jurisdiction of Incorporation** |
| C4T Securities Corporation | Massachusetts |

---

## Exhibit 23.1

**Exhibit 23.1**

**Consent of Independent Registered Public Accounting Firm**

We consent to the incorporation by reference in the registration statements (Nos. 333-282933, 333-282934, and 333-291696) on Form S-3 and (Nos. 333-249286, 333-254145, 333-262949, 333-269944, 333-277245, and 333-285304) on Form S-8 of our report dated February 26, 2026, with respect to the consolidated financial statements of C4 Therapeutics, Inc.

/s/ KPMG LLP

Boston, Massachusetts

February 26, 2026

## Exhibit 31.1

**Exhibit 31.1**

**CERTIFICATION PURSUANT TO**

**RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002**

I, Andrew J. Hirsch, certify that:

1. I have reviewed this Annual Report on Form 10-K of C-4 Therapeutics. Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

---

| | | |
|:---|:---|:---|
| Date: February 26, 2026 | By: | /s/ Andrew J. Hirsch |
|  |  | **Andrew J. Hirsch** |
|  |  | **President and Chief Executive Officer** |
|  |  | **(Principal executive officer)** |

---

## Exhibit 31.2

**Exhibit 31.2**

**CERTIFICATION PURSUANT TO**

**RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002**

I, Kendra R. Adams, certify that:

1. I have reviewed this Annual Report on Form 10-K of C-4 Therapeutics. Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

---

| | | |
|:---|:---|:---|
| Date: February 26, 2026 | By: | /s/ Kendra R. Adams |
|  |  | **Kendra R. Adams** |
|  |  | **Chief Financial Officer** |
|  |  | **(Principal financial officer)** |

---

## Exhibit 32.1

**Exhibit 32.1**

**CERTIFICATION PURSUANT TO**

**18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO**

**SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002**

In connection with the Quarterly Report of C4 Therapeutics, Inc. (the "Company") on Form 10-K for the period ending December 31, 2025 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

---

| | | |
|:---|:---|:---|
| Date: February 26, 2026 | By: | /s/ Andrew J. Hirsch |
|  |  | **Andrew J. Hirsch** |
|  |  | **President and Chief Executive Officer** |
|  |  | **(Principal executive officer)** |

---

## Exhibit 32.2

**Exhibit 32.2**

**CERTIFICATION PURSUANT TO**

**18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO**

**SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002**

In connection with the Quarterly Report of C4 Therapeutics, Inc. (the "Company") on Form 10-K for the period ending December 31, 2025 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

---

| | | |
|:---|:---|:---|
| Date: February 26, 2026 | By: | /s/ Kendra R. Adams |
|  |  | **Kendra R. Adams** |
|  |  | **Chief Financial Officer** |
|  |  | **(Principal financial officer)** |

---

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