Shattuck Labs grants 351,400 options to executive

Shattuck Labs, Inc. reported that officer Stephen Stout received a stock option award for 351,400 shares of common stock at an exercise price of $4.75 per share on January 10, 2026.

Rhea-AI Filing Summary

Shattuck Labs, Inc. reported that officer Stephen Stout received a stock option award for 351,400 shares of common stock at an exercise price of $4.75 per share on January 10, 2026. The option vests over time, with one quarter vesting on January 10, 2027 and the remaining three quarters vesting in equal monthly installments through January 10, 2030, contingent on his continued service.

On the same date, 4,153 shares of common stock were withheld at $4.75 per share in a transaction coded “F,” typically used for tax withholding, leaving Stout with 82,122 common shares held directly after the transaction.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Stout Stephen

Role See Remarks

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	351,400	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	4,153	$4.75	$20K

Holdings After Transaction: Stock Option (Right to Buy) — 351,400 contracts (Direct); Common Stock — 82,122 shares (Direct)

Footnotes (1)

1. F1. 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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Shattuck Labs (STTK) disclose in this Form 4 filing?

The filing shows that officer Stephen Stout received a stock option grant for 351,400 shares of Shattuck Labs common stock at an exercise price of $4.75 per share on January 10, 2026, along with a related share withholding transaction.

How many Shattuck Labs (STTK) options were granted to Stephen Stout?

Stephen Stout was granted a stock option representing the right to purchase 351,400 shares of Shattuck Labs common stock at an exercise price of $4.75 per share.

What is the vesting schedule for Stephen Stout’s 351,400 Shattuck Labs options?

According to the footnote, one quarter of the 351,400-share option vests on January 10, 2027, and the remaining three quarters vest in equal monthly installments through January 10, 2030, subject to his continued service to the company.

What does the ‘F’ transaction in Shattuck Labs (STTK) Form 4 represent?

The Form 4 reports a transaction coded “F” on January 10, 2026 involving 4,153 shares of common stock at $4.75 per share, which is typically used for shares withheld to cover taxes or similar obligations.

How many Shattuck Labs shares does Stephen Stout hold after these transactions?

After the reported F transaction on January 10, 2026, Stephen Stout beneficially owns 82,122 shares of Shattuck Labs common stock directly, as shown in the Form 4.

When do Stephen Stout’s newly granted Shattuck Labs options expire?

The stock option granted to Stephen Stout on January 10, 2026 has an expiration date of January 10, 2036, as disclosed in the derivative securities table.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 01/13/2026 - 04:55 PM Learn about SEC filing dates

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Stout Stephen

(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)
	See Remarks

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		4,153	D	$4.75	82,122	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		351,400		(1)	01/10/2036	Common Stock	351,400	$0	351,400	D

Explanation of Responses:

1. 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.

Remarks:

General Counsel, Corporate Secretary and Chief Ethics and Compliance Officer

	/s/ Stephen Stout	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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.