Matthew Keith Custer - 29 Jul 2025 Form 4 Insider Report for CYANOTECH CORP (CYAN)

Role
President and CEO, Director
Signature
/s/ Amy B. Nordin by POA
Issuer symbol
CYAN
Transactions as of
29 Jul 2025
Net transactions value
$0
Form type
4
Filing time
31 Jul 2025, 13:32:48 UTC
Previous filing
18 Jun 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Custer Matthew Keith President and CEO, Director 73-4460 QUEEN KAAHUMANU HWY #102, KAILUA-KONA /s/ Amy B. Nordin by POA 31 Jul 2025 0001789455

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CYAN Common Stock Options Exercise $0 +2,075 +44% $0.000000 6,754 29 Jul 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CYAN Restricted Stock Units Options Exercise $0 -2,075 -3.1% $0.000000 64,137 29 Jul 2025 Common Stock 2,075 Direct F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents the conversion upon vesting of restricted stock units into common stock.
F2 Each restricted stock unit represents the contingent right to receive one (1) share of Cyanotech Common Stock.
F3 The restricted stock units vest as to 34 shares on April 6, 2026; 21,368 shares on June 16, 2026; 21,368 on June 16, 2027 and 21,367 shares on June 16, 2028, in each case subject to the reporting person's continued service with the Company on the vesting date.