Matthew Keith Custer Cyanotech Corp (CYAN) insider trading activity

Matthew Keith Custer is President and CEO of CYANOTECH CORP. Currently has a direct ownership of 6,754 shares of CYAN, which is worth approximately $1,620. The most recent transaction as insider was on Jul 29, 2025, when has been sold 2,075 shares (Common Stock) at a price of $0.0 per share, resulting in proceeds of $0. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 6.75K

44.35% 3M change

45.37% 12M change

Total Value Held $1,620

Matthew Keith Custer Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Jul 29 2025	BUY Exercise of conversion of derivative security	-	2,075 Added 23.5%	6,754 Common Stock
Apr 07 2025	BUY Exercise of conversion of derivative security	-	33 Added 0.7%	4,679 Common Stock
Jul 29 2024	SELL Payment of exercise price or tax liability	$436 $0.56 p/Share	779 Reduced 14.36%	4,646 Common Stock
Jul 29 2024	BUY Exercise of conversion of derivative security	-	2,074 Added 27.66%	5,425 Common Stock
Apr 08 2024	SELL Payment of exercise price or tax liability	$5 $0.4 p/Share	13 Reduced 0.39%	3,351 Common Stock
Apr 08 2024	BUY Exercise of conversion of derivative security	-	33 Added 0.97%	3,364 Common Stock
Jul 31 2023	SELL Payment of exercise price or tax liability	$821 $0.84 p/Share	978 Reduced 22.7%	3,331 Common Stock
Jul 31 2023	BUY Exercise of conversion of derivative security	-	2,603 Added 37.66%	4,309 Common Stock
Apr 06 2023	SELL Payment of exercise price or tax liability	$12 $0.94 p/Share	13 Reduced 0.76%	1,706 Common Stock
Apr 06 2023	BUY Exercise of conversion of derivative security	-	34 Added 1.94%	1,719 Common Stock
Aug 01 2022	SELL Payment of exercise price or tax liability	$627 $3.15 p/Share	199 Reduced 10.56%	1,685 Common Stock
Aug 01 2022	BUY Exercise of conversion of derivative security	-	529 Added 21.92%	1,884 Common Stock
Apr 06 2022	SELL Payment of exercise price or tax liability	$39 $3.03 p/Share	13 Reduced 0.95%	1,355 Common Stock
Apr 06 2022	BUY Exercise of conversion of derivative security	-	33 Added 2.36%	1,368 Common Stock
Jul 30 2021	BUY Exercise of conversion of derivative security	-	530 Added 28.42%	1,335 Common Stock
Jul 13 2021	BUY Exercise of conversion of derivative security	-	254 Added 23.98%	805 Common Stock
Apr 06 2021	BUY Exercise of conversion of derivative security	-	33 Added 5.65%	551 Common Stock

MKC

Matthew Keith Custer

President and CEO

Kailua Kona, HI

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