X0508 4 2026-01-10 0001680367 Shattuck Labs, Inc. STTK 0001970664 Stout Stephen C/O SHATTUCK LABS, INC. 500 W. 5TH STREET, SUITE 1200 AUSTIN TX 78701 false true false false See Remarks false Common Stock 2026-01-10 4 F false 4153 4.75 D 82122 D Stock Option (Right to Buy) 4.75 2026-01-10 4 A false 351400 0 A 2036-01-10 Common Stock 351400 351400 D This option represents a right to purchase a total of 351,400 shares of the Issuer's common stock, one quarter of which will vest on January 10, 2027, with the remaining three quarters vesting in equal monthly installments through January 10, 2030, subject to the Reporting Person's continued service to the Issuer. General Counsel, Corporate Secretary and Chief Ethics and Compliance Officer /s/ Stephen Stout 2026-01-13