X0306 4 2018-07-13 0000768408 CYANOTECH CORP CYAN 0001369133 Cysewski Gerald R 73-4460 QUEEN KAAHUMANU HWY #102 KAILUA-KONA HI 96740 1 1 CSO Cyanotech common stock 120959 D Cyanotech common stock 250 I Held by spouse Restricted stock units 2018-07-13 4 A 0 2210 0 A Cyanotech common stock 2210 2210 D Restricted stock units Cyanotech common stock 333 333 D Restricted stock units Cyanotech common stock 16667 16667 D Cyanotech common stock options 2.0800 2019-04-29 Cyanotech common stock 10000 10000 D Cyanotech common stock options 3.5800 2021-06-30 Cyanotech common stock 12000 12000 D Cyanotech common stock options 3.8200 2021-08-27 Cyanotech common stock 103000 103000 D Cyanotech common stock options 5.8400 2022-07-18 Cyanotech common stock 12500 12500 D Each restricted stock unit represents the contingent right to receive one (1) share of Cyanotech common stock. The restricted stock units shall vest as to 737 shares on July 13, 2019, 737 shares on July 13, 2020 and 736 shares on July 13, 2021, in each case subject to the reporting person's continued service with Cyanotech on the vesting date. The restricted stock units shall vest as to 167 shares on April 5, 2019 and 166 shares on April 5, 2020, in each case subject to the reporting person's continued service with Cyanotech on the vesting date. The restricted stock units shall vest as to 8,333 on March 31, 2019 and 8,334 on March 31, 2020, in each case subject to the reporting person's continued service with Cyanotech on the vesting date. Fully exercisable /s/ Dan Sprague, by Power of Attorney 2018-07-18