Shattuck Labs (STTK) Chief Business Officer discloses 2,286-share stock transaction

Rhea-AI Filing Summary

Shattuck Labs, Inc. Chief Business Officer Casi DeYoung reported a small share disposition in company stock. On 01/25/2026, DeYoung disposed of 2,286 shares of Shattuck Labs common stock at a price of $4.15 per share in a transaction coded "F," which typically reflects a disposition reported on a Form 4. Following this transaction, DeYoung directly beneficially owned 73,480 shares of Shattuck Labs common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider DeYoung Casi

Role Chief Business Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	2,286	$4.15	$9K

Holdings After Transaction: Common Stock — 73,480 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

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^*

DeYoung Casi

(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 Business Officer

3. Date of Earliest Transaction (Month/Day/Year)
01/25/2026

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	01/25/2026		F		2,286	D	$4.15	73,480	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

Explanation of Responses:

	/s/ Andrew R. Neill, Attorney-in-fact for Casi DeYoung	01/27/2026
	** 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.

FAQ

What insider transaction did Shattuck Labs (STTK) report for Casi DeYoung?

Shattuck Labs reported that Chief Business Officer Casi DeYoung disposed of 2,286 shares of company common stock on 01/25/2026 in a transaction coded "F."

At what price were the Shattuck Labs (STTK) shares transacted in this Form 4?

The reported transaction involved Shattuck Labs common stock at a price of $4.15 per share for the 2,286 shares disposed of.

How many Shattuck Labs (STTK) shares does Casi DeYoung hold after this transaction?

After the reported transaction, Casi DeYoung beneficially owned 73,480 shares of Shattuck Labs common stock in direct ownership.

What is the role of Casi DeYoung at Shattuck Labs (STTK)?

Casi DeYoung is reported as an officer of Shattuck Labs with the title Chief Business Officer, and is not listed as a director or 10% owner.

Does this Shattuck Labs (STTK) Form 4 involve derivative securities?

No derivative securities are reported in this Form 4 table; the filing only shows a transaction in common stock and an empty derivative securities table.

Is the ownership reported by Casi DeYoung in Shattuck Labs (STTK) direct or indirect?

The Form 4 lists the 73,480 shares of Shattuck Labs common stock as held with direct (D) ownership, with no indirect ownership nature specified.