Chief Technical Officer Shukla Abhinav A. exercised 12,563 shares at a strike of $3.57 and sold $2,874 worth of shares (410 units at $7.01) as part of a pre-agreed trading plan, increasing direct ownership by 14% to 98,533 units (SEC Form 4) to satisfy withholding obligation
$STTK
Biotechnology: Pharmaceutical Preparations
Health Care
| 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 |
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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*
(Street)
(Country) | 2. Issuer Name and Ticker or Trading Symbol
Shattuck Labs, Inc. [ STTK ] | 5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
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| 2a. Foreign Trading Symbol
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| 3. Date of Earliest Transaction
(Month/Day/Year) 07/02/2026 | 6. Individual or Joint/Group Filing (Check Applicable Line)
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| 4. If Amendment, Date of Original Filed
(Month/Day/Year) |
| Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned | ||||||||||
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| 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 | 07/02/2026 | M | 410 | A | $3.57 | 86,790 | D | |||
| Common Stock | 07/02/2026 | S(1) | 410 | D | $7.01(2) | 86,380 | D | |||
| Common Stock | 07/06/2026 | M | 12,153 | A | $3.57 | 98,533 | D | |||
| Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) | |||||||||||||||
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| 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) | $3.57 | 07/02/2026 | M | 410 | (3) | 01/25/2033 | Common Stock | 410 | $0.00 | 26,293 | D | ||||
| Stock Option (Right to Buy) | $3.57 | 07/06/2026 | M | 12,153 | (3) | 01/25/2033 | Common Stock | 12,153 | $0.00 | 14,140 | D | ||||
| Explanation of Responses: |
| 1. Sale of shares effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 2, 2026. The plan is intended to execute sales of shares received upon option exercise only as needed to fund the exercise price and estimated tax withholding associated with option exercises under the plan. Under the procedures of the administering broker, acquired shares are first sold to fund the aggregate exercise price and estimated tax withholding with respect to all possible option exercises in a particular order under the plan and only once fully funded will acquired shares be held by the Reporting Person. This transaction represents the final sale of shares needed to fully fund the exercise price and estimated tax withholding for the option exercises under this order of the plan and the remaining shares acquired upon exercise under this order will be held by the Reporting Person. |
| 2. The price reported above is a weighted average price. The shares were sold in multiple transactions at prices ranging from $7.000 to $7.030, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range. |
| 3. This option represents a right to purchase a total of 52,200 shares of the Issuer's common stock, one quarter of which will vest on January 25, 2024, with the remaining three quarters vesting in equal monthly installments through January 25, 2027, subject to the Reporting Person's continued service to the Issuer. |
| /s/ Andrew R. Neill, Attorney-in-fact for Abhinav A. Shukla | 07/07/2026 | |
| ** 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. | ||
| * Form 4: SEC 1474 (03-26) | ||