Taylor Schreiber - 10 Jan 2026 Form 4 Insider Report for Shattuck Labs, Inc. (STTK)

Role: Chief Executive Officer, Director
Signature: /s/ Andrew R. Neill, Attorney-in-Fact for Taylor Schreiber
Issuer symbol: STTK
Transactions as of: 10 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 13 Jan 2026, 16:40:01 UTC
Previous filing: 27 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Schreiber Taylor	Chief Executive Officer, Director	C/O SHATTUCK LABS, INC., 500 W. 5TH STREET, SUITE 1200, AUSTIN	/s/ Andrew R. Neill, Attorney-in-Fact for Taylor Schreiber	13 Jan 2026	0001601942

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	STTK	Stock Option (Right to Buy)	Award	$0	+1,548,300		$0.000000	1,548,300	10 Jan 2026	Common Stock	1,548,300	$4.75	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This option represents the right to purchase a total of 1,548,300 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.