X0609 4 2026-06-26 0001701541 Black Diamond Therapeutics, Inc. BDTX 0001682019 Kulkarni Samarth false C/O BLACK DIAMOND THERAPEUTICS, INC. ONE MAIN STREET, 14TH FLOOR CAMBRIDGE MA 02142 true false false false 0 Stock Option (Right to Buy) 1.71 2026-06-26 4 A 0 40000 0 A 2036-06-25 Common Stock 40000 40000 D The shares subject to this option shall vest and become exercisable in full upon the earlier to occur of (i) June 26, 2027 or (ii) the Issuer's next annual meeting of stockholders, subject to the Reporting Person's continued service on such vesting date. /s/ Brent Hatzis-Schoch, Attorney-in-Fact 2026-06-29