Matthew Keith Custer - 16 Jun 2025 Form 4 Insider Report for CYANOTECH CORP (CYAN)

Reporting relationship: President and CEO, Director
Issuer ticker: CYAN
Reported as of: 16 Jun 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Jun 2025, 15:33:08 UTC
Prior SEC filing: 09 Apr 2025
Next SEC filing: 31 Jul 2025
Source filing: View source filing
Reporting owner signature: /s/Laura L. Taylor, by Power of Attorney

Key filing fact

Matthew Keith Custer filed Form 4 for CYANOTECH CORP (CYAN) on 18 Jun 2025.

Key facts

This page summarizes Matthew Keith Custer's Form 4 filing for CYANOTECH CORP (CYAN).
2 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 18 Jun 2025, 15:33.

Change

Previous filing in this sequence was filed on 09 Apr 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001789455 Primary reporting owner

Custer Matthew Keith

Relationship: President and CEO, Director
Address: 73-4460 QUEEN KAAHUMANU HWY #102, KAILUA-KONA
Signature: /s/Laura L. Taylor, by Power of Attorney
Signature date: 18 Jun 2025

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CYAN transaction Derivative

Cyanotech common stock options

Award

Transaction value: $0
Shares: +150,000
Change %
Price: $0.000000
Shares after: 150,000
Date: 16 Jun 2025
Ownership: Direct
Underlying class: Cyanotech common stock
Underlying amount: 150,000
Exercise price: $0.3900
Footnotes: F1

CYAN transaction Derivative

Restricted Stock Units

Award

Transaction value: $0
Shares: +64,103
Change %
Price: $0.000000
Shares after: 4,679
Date: 16 Jun 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 64,103
Exercise price
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

The stock options shall vest as to 50,000 shares on June 16, 2026, 50,000 on June 16, 2027 and 50,000 on June 16, 2028, in each case subject to continued service with Cyanotech on the vesting date.

Footnote F2

Each restricted stock unit represents the contingent right to receive one (1) share of Cyanotech Common Stock.

Footnote F3

The restricted stock units vest as to 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.