BioLargo (BLGO) director granted 81,389-share stock option for quarterly board fees

Rhea-AI Filing Summary

BioLargo, Inc. director reported receiving a stock option grant as compensation for board service. On 12/31/2025, the director was issued an option to purchase 81,389 shares of common stock at an exercise price of $0.1843 per share. This award was given in lieu of $15,000 in fees owed for the most recently completed quarterly period and was granted under the company’s 2024 Equity Incentive Plan. Following this grant, the director beneficially owned 2,359,510 derivative securities, all held directly.

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^*

STROMMEN JACK B.

(Last) (First) (Middle)

7108 31ST AVENUE NORTH

(Street)

MINNEAPOLIS MN 55427

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
BIOLARGO, INC. [ BLGO ]

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)
12/31/2025

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
Option to Purchase Common Stock	$0.1843	12/31/2025		A		81,389		12/31/2025	12/31/2035	Common Stock	81,389	(1)	2,359,510	D

Explanation of Responses:

1. This Option was issued to Reporting Person as payment for $15,000 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan.

	/s/ John R. Browning, attorney-in-fact	01/05/2026
	** 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 transaction did BioLargo (BLGO) disclose in this Form 4?

BioLargo disclosed that a director received an option to purchase 81,389 shares of common stock on 12/31/2025 as part of board compensation.

What is the exercise price of the new BioLargo (BLGO) stock option grant?

The option granted to the director has an exercise price of $0.1843 per share for 81,389 shares of BioLargo common stock.

Why did the BioLargo (BLGO) director receive this stock option?

The option was issued as payment for $15,000 in fees owed for the director’s services on the board for the most recently completed quarterly period, under the 2024 Equity Incentive Plan.

How many derivative securities does the BioLargo (BLGO) director own after this transaction?

After the reported transaction, the director beneficially owned 2,359,510 derivative securities related to BioLargo common stock, held directly.

What is the relationship of the reporting person to BioLargo (BLGO)?

The reporting person is a director of BioLargo, Inc., as indicated in the filing, and filed the Form 4 as an individual reporting person.

Under which plan was the BioLargo (BLGO) option grant made?

The stock option was granted pursuant to BioLargo’s 2024 Equity Incentive Plan as compensation for board service.