X0609 4 2026-08-12 0 0001720893 BioXcel Therapeutics, Inc. BTAI 0002111494 Atkins Susan E. false C/O BIOXCEL THERAPEUTICS, INC. 555 LONG WHARF DRIVE, 12TH FLOOR NEW HAVEN CT 06511 1 0 0 0 0 Stock Option (Right to Buy) 1.06 2026-08-12 4 A 0 17000 0 A 2036-08-12 Common Stock 17000 17000 D The option vests and becomes exercisable as to 33% of the underlying shares on the first anniversary of the grant date, and the remaining shares vest in two equal annual installments thereafter on the second and third anniversary of the grant date, subject to the Reporting Person's continuous service with the Issuer through the relevant vesting dates. /s/ Javier Rodriguez, Attorney-in-Fact for Susan E. Atkins 2026-08-14