X0508 4 2025-04-25 false 0001822462 Foghorn Therapeutics Inc. FHTX 0001828724 GOTTSCHALK ADRIAN 500 TECHNOLOGY SQUARE STE #700 CAMBRIDGE MA 02139 true true false false Chief Executive Officer false Common Stock 2025-04-25 4 G false 300000.00 0.00 D 511704.00 I See Footnote Common Stock 2025-04-25 4 G false 300000.00 0.00 A 511704.00 I See Footnote On April 25, 2025, the Adrian H. Gottschalk Living Trust dated September 8, 2009 (the "Gottschalk Living Trust"), of which the Reporting Person is the trustee, distributed 300,000 shares of the Issuer's Common Stock to the Adrian H. Gottschalk 2025 Grantor Retained Annuity Trust dated April 25, 2025 (the "Gottschalk 2025 GRAT"), of which the Reporting Person is the trustee and sole current beneficiary. Consists of 47,497 shares held by the Adrian H. Gottschalk 2023 Grantor Retained Annuity Trust dated May 26, 2023, 300,000 shares held by the Gottschalk 2025 GRAT, and 164,207 shares held by the Gottschalk Living Trust. /s/ Michael LaCascia, Attorney-in-Fact for Adrian Gottschalk 2025-04-28