0001680581 2025-06-26 2025-06-26 false 0001680581 8-K 2025-06-26 FULCRUM THERAPEUTICS, INC. DE 001-38978 47-4839948 26 Landsdowne Street Cambridge MA 02139 (617) 651-8851 false false false false Common stock, par value $0.001 per share FULC NASDAQ false