X0508 4 2026-02-02 0001680581 Fulcrum Therapeutics, Inc. FULC 0001714982 Oltmans Curtis Gale C/O FULCRUM THERAPEUTICS, INC. 26 LANDSDOWNE STREET CAMBRIDGE MA 02139 false true false false Chief Legal Officer false Stock Option (right to buy) 10.72 2026-02-02 4 A false 170000 0.00 A 2036-02-01 Common Stock 170000 170000 D This option was granted on February 2, 2026 and is scheduled to vest in equal quarterly installments over four years beginning on the vesting commencement date of January 1, 2026, subject to the reporting person's continued service on each such vesting date. /s/ Curt Oltmans 2026-02-04