X0508 4 2024-09-09 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 2024-09-09 4 P 0 5000 0.84 A 1318773 I By self as trustee of the Michael Arlen Davis Revocable Trust Cyanotech Corporation Common Stock 2024-09-10 4 P 0 5000 0.83 A 1323773 I By self as trustee of the Michael Arlen Davis Revocable Trust Cyanotech Corporation Common Stock 2024-09-10 4 A 0 66667 0.75 A 1390440 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 To reduce the Company's ongoing cash expense, the Nominating and Corporate Governance Committee of the Board of Directors adopted a resolution allowing each director to elect to receive his quarterly director fees in the form of restricted stock in lieu of cash. The Reporting Person elected to receive shares of restricted stock in lieu of cash for the fourth quarter of fiscal 2023, the first quarter of fiscal 2024, the third quarter of fiscal 2024, the fourth quarter of fiscal 2024 and the first quarter of fiscal 2025. /s/Laura L. Taylor, by Power of Attorney 2024-09-11