Cysewski Gerald R

Director at CYANOTECH CORP · on record since Jul 17, 2006
CEO at CYANOTECH CORP · on record since Aug 2, 2019
Chief Scientific Officer at CYANOTECH CORP · on record since Aug 2, 2022

Insider trading activity of Cysewski Gerald R

Transactions on record: 83; since Jul 17, 2006

Open-market buys: 0

Open-market sells: 0

Companies traded: 1; last filing Jul 31, 2025

Figures computed from official regulatory filings — .

Companies where Cysewski Gerald R has traded

CYANOTECH CORP83 tx · $84.9K · Jul 31, 2025

Track record of Cysewski Gerald R

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Cysewski Gerald R

Co-insiders of Cysewski Gerald R

Bailey Brent DavidCYANOTECH CORP
BlueLine Capital Partners II, L.P.CYANOTECH CORP
BlueLine Partners, L.L.C.CYANOTECH CORP
Brand Jennifer KimberlyCYANOTECH CORP
Capelli Robert JCYANOTECH CORP
Carlton RalphCYANOTECH CORP
Chen Thomas FCYANOTECH CORP
Cole Theron JCYANOTECH CORP
Custer Matthew KeithCYANOTECH CORP
DAVIS MICHAEL A /CYANOTECH CORP
Deal Jole EileenCYANOTECH CORP
Greene Teresa CCYANOTECH CORP
Hartmann Charles JasonCYANOTECH CORP
Jacobson Andrew HCYANOTECH CORP
Jensen GlennCYANOTECH CORP
Johansen Jennifer M.CYANOTECH CORP
JOHNSTONE JANET JCYANOTECH CORP
Kakuk Collette NicoleCYANOTECH CORP
KATZ NANCY ECYANOTECH CORP
Ladin Felicia ICYANOTECH CORP
Lundeen James RandomCYANOTECH CORP
Maris William RCYANOTECH CORP
McElwee Angela MayCYANOTECH CORP
Menzel Walter BennettCYANOTECH CORP
Meridian OHC Partners, LPCYANOTECH CORP
Meridian TSV II, LPCYANOTECH CORP

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
CYANOTECH CORPListing on record	Jul 31, 2025	ExerciseD (derivative)	-1,577	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Jul 31, 2025	Exercise	1,577	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Jul 31, 2025	Other	-592	0.41 USD	$242.7	SEC
CYANOTECH CORPListing on record	Apr 9, 2025	Other	-13	0.31 USD	$4	SEC
CYANOTECH CORPListing on record	Apr 9, 2025	ExerciseD (derivative)	-33	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 9, 2025	Exercise	33	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 20, 2025	Exercise	3,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 20, 2025	ExerciseD (derivative)	-3,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 20, 2025	Other	-1,464	0.40 USD	$585.6	SEC
CYANOTECH CORPListing on record	Jul 31, 2024	Other	-592	0.56 USD	$331.5	SEC
CYANOTECH CORPListing on record	Jul 31, 2024	Exercise	1,576	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Jul 31, 2024	ExerciseD (derivative)	-1,576	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2024	Exercise	33	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2024	Other	-13	0.40 USD	$5.2	SEC
CYANOTECH CORPListing on record	Apr 10, 2024	ExerciseD (derivative)	-33	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 21, 2024	Exercise	3,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 21, 2024	Other	-1,465	0.44 USD	$644.6	SEC
CYANOTECH CORPListing on record	Feb 21, 2024	ExerciseD (derivative)	-3,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Aug 1, 2023	Other	-843	0.84 USD	$708.1	SEC
CYANOTECH CORPListing on record	Aug 1, 2023	ExerciseD (derivative)	-2,243	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Aug 1, 2023	Exercise	2,243	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2023	Exercise	34	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2023	ExerciseD (derivative)	-34	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2023	AwardD (derivative)	100	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2023	Other	-13	0.94 USD	$12.2	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
CYANOTECH CORPListing on record	Jul 31, 2025	ExerciseD (derivative)	-1,577	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Jul 31, 2025	Exercise	1,577	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Jul 31, 2025	Other	-592	0.41 USD	$242.7	SEC
CYANOTECH CORPListing on record	Apr 9, 2025	Other	-13	0.31 USD	$4	SEC
CYANOTECH CORPListing on record	Apr 9, 2025	ExerciseD (derivative)	-33	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 9, 2025	Exercise	33	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 20, 2025	Exercise	3,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 20, 2025	ExerciseD (derivative)	-3,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 20, 2025	Other	-1,464	0.40 USD	$585.6	SEC
CYANOTECH CORPListing on record	Jul 31, 2024	Other	-592	0.56 USD	$331.5	SEC
CYANOTECH CORPListing on record	Jul 31, 2024	Exercise	1,576	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Jul 31, 2024	ExerciseD (derivative)	-1,576	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2024	Exercise	33	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2024	Other	-13	0.40 USD	$5.2	SEC
CYANOTECH CORPListing on record	Apr 10, 2024	ExerciseD (derivative)	-33	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 21, 2024	Exercise	3,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Feb 21, 2024	Other	-1,465	0.44 USD	$644.6	SEC
CYANOTECH CORPListing on record	Feb 21, 2024	ExerciseD (derivative)	-3,900	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Aug 1, 2023	Other	-843	0.84 USD	$708.1	SEC
CYANOTECH CORPListing on record	Aug 1, 2023	ExerciseD (derivative)	-2,243	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Aug 1, 2023	Exercise	2,243	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2023	Exercise	34	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2023	ExerciseD (derivative)	-34	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2023	AwardD (derivative)	100	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CYANOTECH CORPListing on record	Apr 10, 2023	Other	-13	0.94 USD	$12.2	SEC