BioLargo Director Dennis Marshall Granted 314,000 Stock Options

This Form 4 filing reports that BioLargo, Inc. director Dennis E. Marshall received two stock option grants on June 30, 2026. The first grant was for 198,238 options to replace an expired 22,500-share option that had a pricing discrepancy. The second grant was for 115,741 options issued as payment for $18,750 in director fees for services rendered. Both options have an exercise price of $0.1135 per share and expire on June 30, 2036. Following these transactions, Marshall holds options covering approximately 5.8 million shares of BioLargo common stock. The filing includes a limited power of attorney authorizing John R. Browning to file Section 16 reports on Marshall's behalf.