X0508 4 2024-09-17 0000768408 CYANOTECH CORP CYAN 0001201156 DAVIS MICHAEL A / CYANOTECH CORPORATION 73-4460 QUEEN KAAHUMANU HWY #102 KAILUA-KONA HI 96740 1 1 1 Cyanotech Corporation Common Stock 2024-09-17 4 P 0 4000 0.74 A 1414440 I By self as trustee of the Michael Arlen Davis Revocable Trust Cyanotech Corporation Common Stock 2024-09-17 4 P 0 1000 0.72 A 1415440 I By self as trustee of the Michael Arlen Davis Revocable Trust Cyanotech Corporation Common Stock 2024-09-18 4 P 0 5000 0.78 A 1420440 I By self as trustee of the Michael Arlen Davis Revocable Trust Cyanotech Corporation Common Stock 12119 D Cyanotech Corporation Common Stock 31250 I By Spouse Cyanotech Corporation Common Stock 150000 I By self as co-trustee for the Nyracai Davis Irr. Trust and the Nettizanne J. Davis Irr. Trust Cyanotech Corporation Common Stock 58000 I By self as trustee for Nettizanne Johnstone Davis GST Exempt Trust Cyanotech Corporation Common Stock 58789 I By self as trustee for Nyracai Johnstone Davis GST Exempt Trust Adoption date of referenced 10b5-1(c) plan is: 03-06-2024 /s/Laura L. Taylor, by Power of Attorney 2024-09-19