X0609 4 2026-09-11 0001829802 Faeth Therapeutics, Inc. FTH 0001723884 Vousden Karen H false C/O FAETH THERAPEUTICS, INC. 701 TILLERY STREET #12 #1010 AUSTIN TX 78702 true false false false 0 Stock Option (right to buy) 37.44 2026-09-11 4 A 0 25000 0 A 2036-09-10 Common Stock 25000 25000 D The shares subject to the option vest and become exercisable in 36 equal monthly installments over a three year period such that the option is fully vested on the third anniversary of the date of grant, or September 11, 2029, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date. /s/ Josiah Craver, Attorney-in-Fact 2026-09-15