X0206 3 2020-10-01 0 0001662579 C4 Therapeutics, Inc. CCCC 0001825153 Wahlberg Laura Jean C/O C4 THERAPEUTICS, INC. 490 ARSENAL WAY, SUITE 200 WATERTOWN MA 02472 0 1 0 0 See Remarks Stock Option (Right to Buy) 2.11 2026-07-12 Common Stock 10078 D Stock Option (Right to Buy) 2.11 2026-10-23 Common Stock 4150 D Stock Option (Right to Buy) 3.72 2027-11-27 Common Stock 3557 D Stock Option (Right to Buy) 6.50 2029-04-08 Common Stock 2964 D Stock Option (Right to Buy) 4.98 2030-07-02 Common Stock 14821 D Stock Option (Right to Buy) 4.98 2030-07-02 Common Stock 2075 D 20% of this option vested and became exercisable on May 16, 2017, with the remainder vesting in 16 equal quarterly installments thereafter. 20% of this option vested and became exercisable on September 1, 2017, with the remainder vesting in 16 equal quarterly installments thereafter. 20% of this option vested and became exercisable on November 1, 2018, with the remainder vesting in 16 equal quarterly installments thereafter. 20% of this option vested and became exercisable on January 1, 2020, with the remainder vesting in 16 equal quarterly installments thereafter. This option shall vest and become exercisable in 20 equal quarterly installments, with the first installment vesting on August 1, 2020. This option shall vest and become exercisable in 10 equal quarterly installments, with the first installment vesting on September 5, 2020. Officer Title: Vice President of Finance and Chief Corporate Controller (Principal Accounting Officer) Exhibit 24 - Power of Attorney /s/ Jolie M. Siegel, Attorney-in-Fact 2020-10-01