X0508 4 2026-01-21 0001701541 Black Diamond Therapeutics, Inc. BDTX 0001880385 Buck Elizabeth C/O BLACK DIAMOND THERAPEUTICS, INC. 245 FIRST STREET, 18TH FLOOR CAMBRIDGE MA 02142 false true false false CHIEF SCIENTIFIC OFFICER 0 Stock Option (Right to Buy) 2.57 2026-01-21 4 A 0 250000 0 A 2036-01-20 Common Stock 250000 250000 D 25% of the shares subject to this option shall vest and become exercisable on January 21, 2027, with the remainder vesting in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date. /s/ Brent Hatzis-Schoch, Attorney-in-Fact 2026-01-23