JACK B. STROMMEN - 30 Sep 2025 Form 4 Insider Report for BIOLARGO, INC. (BLGO)

Role: Director
Signature: /s/ John R. Browning, attorney-in-fact
Issuer symbol: BLGO
Transactions as of: 30 Sep 2025
Net transactions value: $0
Form type: 4
Filing time: 02 Oct 2025, 15:52:41 UTC
Previous filing: 02 Jul 2025
Next filing: 05 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
STROMMEN JACK B.	Director	7108 31ST AVENUE NORTH, MINNEAPOLIS	/s/ John R. Browning, attorney-in-fact	02 Oct 2025	0001663146

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	BLGO	Option to Purchase Common Stock	Award		+88,235	+4%		2,278,121	30 Sep 2025	Common Stock	88,235	$0.1700	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.