X0609 4 2026-09-30 0000880242 BIOLARGO, INC. BLGO 0001370684 CODE KENNETH REAY false 14921 CHESTNUT ST. WESTMINSTER CA 92683 1 1 Chief Science Officer 0 Common Stock 2026-09-30 4 A 0 566261 0.08 A 26974580 D Common Stock 2026-09-30 4 G 0 2000000 0 D 24974580 D The shares acquired 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 acquired and the acquisition price per share). Aggregate total shares includes 22,139,012 shares owned indirectly by Reporting Person through a wholly owned corporation. /s/ John R. Browning, attorney-in-fact 2026-10-02