Matthew Keith Custer

Insider Reports History

Identity Names, identifiers, and filing context for this profile. 1 identity field
Reporting-owner location
Kailua Kona, HI
SEC source record Original filing metadata and source links for verification. 1 source field
Latest reporting-owner signature
/s/ Amy B. Nordin by POA
Source: Latest parsed Forms 3/4/5 signature
Source evidence Original filing metadata and source links for verification. 1 source field
Transaction source note
Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Matthew Keith Custer

Form 4 holding President and CEO, Director

CYANOTECH CORP

Security class
Common Stock
Shares / value
6,754
Estimated value
$1,450
Report date
29 Jul 2025
Price
$0.3100
Ownership
Direct
Form 4 holding President and CEO, Director

CYANOTECH CORP

Security class
Restricted Stock Units
Shares / value
64,137
Estimated value
$654
Report date
29 Jul 2025
Price
$0.3100
Ownership
Direct
Underlying class
Common Stock
Underlying amount
Form 4 holding President and CEO, Director

CYANOTECH CORP

Security class
Cyanotech common stock options
Shares / value
150,000
Estimated value
Report date
16 Jun 2025
Price
Ownership
Direct
Underlying class
Cyanotech common stock
Underlying amount

Insider Reports Filed by Matthew Keith Custer

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