SAB Biotherapeutics (SABS) director awarded 150,000 stock options for 2025

Rhea-AI Filing Summary

SAB Biotherapeutics, Inc. reported an equity award to director William James Polvino. On December 16, 2025, he received a stock option covering 150,000 shares of common stock at an exercise price of $3.99 per share. This grant represents his 2025 annual compensation as a member of the Board of Directors. The option vests in two equal installments on December 16, 2026 and December 16, 2027, meaning he earns the right to exercise half the option on each of those dates. The award was granted under the company’s 2021 Omnibus Equity Incentive Plan, as amended.

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

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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^*

Polvino William James

(Last) (First) (Middle)

777 W 41ST STREET, SUITE 401

(Street)

MIAMI BEACH FL 33140

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
SAB Biotherapeutics, Inc. [ SABS ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
12/16/2025

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

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)(1)(2)	$3.99	12/16/2025		A		150,000		(1)	12/16/2035	Common Stock	150,000	$0	150,000	D

Explanation of Responses:

1. Represents the 2025 annual grant to the Reporting Person as a member of the Board of Directors of the Issuer. Shares underlying the option vest in two equal annual installments on December 16, 2026 and December 16, 2027.

2. This award was made pursuant to the Issuer's 2021 Omnibus Equity Incentive Plan, as amended.

	/s/ William James Polvino	12/18/2025
	** 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 SAB Biotherapeutics (SABS) report in this Form 4?

SAB Biotherapeutics reported that director William James Polvino received a stock option for 150,000 shares of common stock on December 16, 2025 at an exercise price of $3.99 per share.

Who is the reporting person in the SAB Biotherapeutics (SABS) Form 4 filing?

The reporting person is William James Polvino, who is identified as a director of SAB Biotherapeutics, Inc.

What are the vesting terms of the 150,000 SAB Biotherapeutics (SABS) stock options?

The 150,000 stock options vest in two equal annual installments, with half vesting on December 16, 2026 and the remaining half on December 16, 2027.

What is the exercise price of the SAB Biotherapeutics (SABS) stock option granted to William James Polvino?

The stock option granted to William James Polvino has an exercise price of $3.99 per share.

Under which equity plan was the SAB Biotherapeutics (SABS) option grant made?

The option grant was made pursuant to SAB Biotherapeutics’ 2021 Omnibus Equity Incentive Plan, as amended.

Is the 150,000 share option grant to William James Polvino a recurring award for SAB Biotherapeutics (SABS)?

The filing notes that the 150,000 share stock option represents the 2025 annual grant to William James Polvino as a member of the Board of Directors.