X0306 4/A 2020-03-31 2020-04-02 0000880242 BIOLARGO, INC. BLGO 0001526142 Roberts Kent Charles II 1146 OXFORD ROAD SAN MARINO CA 91108 1 Option to Purchase Common Stock 0.1700 2020-03-31 2030-03-31 Common stock 88235 1604948 D The originally filed Form 4 was filed due to a clerical error - it was a duplicate of SEC Accession No. 0001437749-20-006919, filed the same day. /s/ John R. Browning, Attorney-in-fact 2020-04-07