Shattuck Labs (NASDAQ: STTK) CFO gets 549,800 options, sells shares

Rhea-AI Filing Summary

Shattuck Labs Chief Financial Officer Andrew R. Neill reported new equity awards and a share transaction. On January 10, 2026, he received a stock option to purchase 549,800 shares of Shattuck Labs common stock at an exercise price of $4.75 per share. According to the vesting terms, one quarter of this option will vest on January 10, 2027, with the remaining three quarters vesting in equal monthly installments through January 10, 2030, contingent on his continued service.

On the same date, Neill also disposed of 6,660 shares of common stock at $4.75 per share, leaving him with 230,813 shares of common stock held directly after the transaction, in addition to the newly granted option position.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Neill Andrew R

(Last) (First) (Middle)

C/O SHATTUCK LABS, INC.

500 W. 5TH STREET, SUITE 1200

(Street)

AUSTIN TX 78701

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Shattuck Labs, Inc. [ STTK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
01/10/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	01/10/2026		F		6,660	D	$4.75	230,813	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$4.75	01/10/2026		A		549,800		(1)	01/10/2036	Common Stock	549,800	$0.00	549,800	D

Explanation of Responses:

1. This option represents a right to purchase a total of 549,800 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.

	/s/ Andrew R. Neill	01/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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FAQ

What insider transactions did Shattuck Labs (STTK) report in this Form 4?

The filing reports that Chief Financial Officer Andrew R. Neill received a stock option for 549,800 shares of Shattuck Labs common stock at an exercise price of $4.75 per share, and on the same date disposed of 6,660 shares of common stock at $4.75 per share.

How many Shattuck Labs shares is the CFO’s new stock option for, and at what price?

The new award is a stock option (right to buy) covering 549,800 shares of Shattuck Labs common stock with an exercise price of $4.75 per share.

What is the vesting schedule for the Shattuck Labs CFO’s 549,800-share option grant?

Per the footnote, one quarter of the option vests on January 10, 2027, and the remaining three quarters vest in equal monthly installments through January 10, 2030, subject to the CFO’s continued service to Shattuck Labs.

How many Shattuck Labs shares does the CFO own after these transactions?

Following the reported transactions, Andrew R. Neill beneficially owns 230,813 shares of Shattuck Labs common stock directly, plus the newly granted option covering 549,800 shares.

What does the transaction code F mean for the 6,660 Shattuck Labs shares?

The Form 4 lists the common stock transaction as code “F”, indicating a disposition of 6,660 shares of common stock at $4.75 per share, with the shares held directly by the CFO before the transaction.

Is the Shattuck Labs CFO’s stock option held directly or indirectly?

The filing shows the 549,800-share stock option as held with ownership form Direct (D), meaning it is directly attributable to CFO Andrew R. Neill.