Exhibit 99.1 Foghorn Therapeutics Provides First Quarter 2024 Financial and Corporate Update Dose escalation in FHD-286 combination trial in AML continues to progress with clinical data expected in the second half of 2024; potential to be a first-in-class oral broad-based differentiation therapeutic in AML IND filing submitted for FHD-909, a first-in-class oral BRM (SMARCA2) selective inhibitor; Phase 1 trial planned to begin in the second half of 2024 with primary target population in BRG1 mutated non-smal ...