X0306 4 2020-11-17 0 0001822462 Foghorn Therapeutics Inc. FHTX 0001831755 LaCascia Michael 500 TECHNOLOGY SQUARE, STE 700 CAMBRIDGE MA 02139 0 1 0 0 Chief Legal Officer Stock Option (Right to Buy) 17.00 2020-11-17 4 A 0 162162 0.00 A 2030-11-16 Common Stock 162162 162162 D 25% of the shares underlying the stock option shall vest on November 9, 2021, with the remainder vesting in 12 substantially equal quarterly installments thereafter, subject to the Reporting Person's continued service with the Issuer through such applicable vesting dates. /s/ Allan Reine, M.D., Attorney-in-Fact 2020-11-18