BioLargo (BLGO) President acquires 130,222 shares under lock-up terms

Rhea-AI Filing Summary

BioLargo, Inc. director and President received additional common stock as compensation. On 12/31/2025, the reporting person acquired 130,222 shares of BioLargo common stock at $0.1843 per share, in exchange for a reduction of salary and unreimbursed business expenses. After this transaction, the reporting person beneficially owned 10,523,625 shares of BioLargo common stock, held directly, which includes shares held through a limited liability company that the reporting person owns and controls. The newly issued shares are subject to a lock-up agreement and cannot be sold until BioLargo reports at least $40 million in gross revenue for any reported period, or its market capitalization exceeds $300 million, or there is a change in control of the company.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider CALVERT DENNIS P

Role President

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	130,222	$0.1843	$24K

Holdings After Transaction: Common Stock — 10,523,625 shares (Direct)

Footnotes (1)

1. The shares issued are subject to a Lock-Up Agreement dated as of the issuance date whereby shares are locked-up and restricted from sale until the Issuer reports gross revenue of at least $40 million on a consolidated basis for any reported period (e.g, quarter or annual), or the Issuer's market capitalization exceeds $300 million, or there is a "change in control" in the Issuer. Shares received from Issuer in exchange for a reduction in amounts owed by Issuer to Reporting Person for salary and unreimbursed business expenses (equal to the product of the number of shares issued and the acquisition price per share). Includes 1,528,695 shares owned indirectly by Reporting Person through a limited liability company owned and controlled by Reporting Person.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 01/05/2026 - 06:30 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^*

CALVERT DENNIS P

(Last) (First) (Middle)

14921 CHESTNUT ST.

(Street)

WESTMINSTER CA 92683

(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
X	Officer (give title below)		Other (specify below)
	President

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
Common Stock	12/31/2025		A		130,222(1)	A	$0.1843(2)	10,523,625	D(3)

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:

1. The shares issued are subject to a Lock-Up Agreement dated as of the issuance date whereby shares are locked-up and restricted from sale until the Issuer reports gross revenue of at least $40 million on a consolidated basis for any reported period (e.g, quarter or annual), or the Issuer's market capitalization exceeds $300 million, or there is a "change in control" in the Issuer.

2. Shares received from Issuer in exchange for a reduction in amounts owed by Issuer to Reporting Person for salary and unreimbursed business expenses (equal to the product of the number of shares issued and the acquisition price per share).

3. Includes 1,528,695 shares owned indirectly by Reporting Person through a limited liability company owned and controlled by Reporting Person.

	/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.
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.