X0306 4 2020-05-01 0000880242 BIOLARGO, INC. BLGO 0001228572 CALVERT DENNIS P 14921 CHESTNUT ST. WESTMINSTER CA 92683 1 1 President Option to Purchase Common Stock 0.14 2020-05-01 4 A 0 50000 0 A 2020-05-01 2030-05-01 Common stock 50000 3846322 D Option to purchase common stock 0.14 2020-05-01 4 A 0 343571 0 A 2020-08-01 2030-05-01 Common stock 343571 4189893 D This Option was granted to Reporting Person to replace an option to purchase 200,000 shares that had been issued approximately 10 years ago to compensate Reporting Person for services to the Issuer and had recently expired unexercised due to a discrepancy between the original exercise price and current Issuer stock price, pursuant to plan adopted by the Issuer's Compensation Committee. This amount reflects, in addition to the reported option, grant, the expiration on February 1, 2020, of an option to purchase 200,000 shares of common stock. This option vests in four equal installments every three months beginning August 1, 2020. On May 1, 2020, in recognition of recent accomplishments in response to the COVID-19 pandemic, the Issuer's Compensation Committee granted options to the Issuer's employees under the 2018 Equity Incentive Plan, including the option reported herein. /s/ John R. Browning, Attorney-in-fact 2020-05-05