Bain Capital Life Sciences Entities' Ownership in C4 Therapeutics, Inc.

Bain Capital Life Sciences Fund II, L.P., BCIP Life Sciences Associates, LP, and BCLS II Equity Opportunities, LP (collectively, the "Reporting Persons") have filed a Schedule 13G to report their beneficial ownership in C4 Therapeutics, Inc. As of the filing date, the Reporting Persons collectively own 7,171,910 shares of Common Stock, representing approximately 7.4% of the outstanding shares. BCLS Fund II holds 991,188 shares, BCIPLS holds 120,722 shares, and BCLS II Equity holds 2,020,000 shares along with warrants to purchase an additional 4,040,000 shares. The filing also notes that BCLS II Equity is restricted from exercising its warrants if it would result in the Reporting Persons owning more than 9.99% of the total outstanding shares. The principal business address for the Bain Capital Life Sciences Entities is 200 Clarendon Street, Boston, Massachusetts 02116.