ABOUT US Quality Policy Statement C4 Therapeutics, Inc., is committed to transforming the treatment of cancer and other diseases through the delivery of high-quality, safe, and effective novel therapies that eliminate disease-causing proteins. In all its operations and activities, C4T and its employees, officers, directors, and certain designated agents follow the principles of C4T’s Code of Business Conduct and Ethics (the “Code”), which is a reaffirmation of C4T’s commitment to conducting its business ethically and to observing all applicable laws, rules, and regulations. The Code reminds and guides C4T through the principles and requirements that govern its business and behavior. Under the Code, when representing C4T, each employee, director, and designated agent must ensure that his, her or their behavior protects and promotes both the letter of the Code and its spirit of ethical conduct. To achieve the goals set forth in this Quality Policy Statement and the Code, C4T is committed to: Ensuring its ability to deliver safe, effective, and reliable medicines that meet or exceed the requirements of our patients. Complying with all applicable legal and regulatory requirements. Operating an effective Quality Management System and continuously improving C4T’s systems and processes. Ensuring the integrity of C4T’s data and the quality of C4T’s products; and Upholding C4T’s accountability for quality on a collective and individual basis. The successful attainment of this policy is the responsibility of all our employees. Management will ensure proper communication, understanding and periodic review of this policy. Communication of the Quality Policy is part of new employee orientation process and included in the annual retraining of employees. Copies of the Quality Policy are prominently displayed throughout the C4T’s facility. The successful attainment of this policy is the responsibility of all employees. Management will ensure proper communication, understanding and periodic review of this policy. Phone 617-231-0700 Location 490 Arsenal Way, Suite 200 Watertown, MA 02472 Email info@c4therapeutics.com © 2021 C4 Therapeutics, Inc. Privacy Policy Terms of Use Agreement Sitemap

ABOUT US Patient focused. Science driven. C4 Therapeutics® is committed to transforming the treatment of cancer and other diseases with novel early stage therapies that show a promising ability to eliminate disease-causing proteins. Our approach to medicine harnesses the innate machinery of the cell to attack disease and potentially bring deep and durable responses to patients. Phone 617-231-0700 Location 490 Arsenal Way, Suite 200 Watertown, MA 02472 Email info@c4therapeutics.com © 2021 C4 Therapeutics, Inc. Privacy Policy Terms of Use Agreement Sitemap