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Cyanotech Corp

CYAN
Exchange
OTC
Industry
Medicinal Chemicals & Botanical Products
SEC CIK
0000768408

No open-market purchases or sales by Cyanotech Corp insiders were filed in the last 90 days; no institution reported holding it in 13F filings for Q2 2026; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Cyanotech Corp insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Cyanotech Corp, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Cyanotech Corp
NameTitleLast reported holdingLast filingFilings, past year
Miyashiro Jennifer A.S.CFO, VP Fin & Admin, Treasurer–Sep 16, 20250
Davis Michael ADirector, 10% Owner1,528,598IndirectSep 2, 20250
Mulder David MDirector203,468Sep 2, 20250
Vied David LDirector225,138Sep 2, 20250
Nordin Amy BethVP, HR, Secretary9,051Jul 31, 20250
Johansen Jennifer M.VP, Quality, Regulatory & Govt9,743Jul 31, 20250
Cysewski Gerald ROther: Chief Scientific Officer146,697Jul 31, 20250
Jensen GlennVP, Operations27,110Jul 31, 20250
Custer Matthew KeithPresident and CEO6,754Jul 31, 20250
Brand Jennifer KimberlyVP of Sales–May 21, 20250
Kakuk Collette NicoleChief Strategic Comml Officer4,707Apr 9, 20250
Rogerson Jennifer CharleneCFO,VP Fin & Admin, Treasurer–Sep 9, 20240
Ladin Felicia ICFO, VP Fin & Admin, Treasurer4,678Jul 31, 20240
Hartmann Charles JasonVP, Sales & Marketing4,422Jul 31, 20240
McElwee Angela MayDirector53,567Aug 28, 20230
Menzel Walter BennettDirector39,455Sep 1, 20220
Katz Nancy EDirector55,395Oct 20, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Oct 3, 2024 (view filing)Oct 12 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+5.00K$0.76+$3.80K+0.3%1.47M after10b5-1
Oct 1, 2024 (view filing)Sep 27-304 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.765+$7.65K+0.7%1.46M after2 lots10b5-1
Sep 27, 2024 (view filing)Sep 25-262 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.77+$7.70K+0.7%1.45M after2 lots10b5-1
Sep 25, 2024 (view filing)Sep 23-242 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.75+$7.50K+0.7%1.44M after2 lots10b5-1
Sep 23, 2024 (view filing)Sep 19-204 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.755+$7.55K+0.7%1.43M after2 lots10b5-1
Sep 19, 2024 (view filing)Sep 17-182 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.758+$7.58K+0.7%1.42M after3 lots10b5-1
Sep 17, 2024 (view filing)Sep 13-164 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.82+$8.20K+0.7%1.41M after2 lots10b5-1
Sep 13, 2024 (view filing)Sep 11-122 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.83+$8.30K+0.7%1.40M after2 lots10b5-1
Sep 11, 2024 (view filing)Sep 9-102 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.835+$8.35K+0.8%1.32M after2 lots10b5-1
Sep 9, 2024 (view filing)Sep 5-64 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.84+$8.40K+0.8%1.31M after2 lots10b5-1
Sep 5, 2024 (view filing)Sep 3-42 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.82+$8.20K+0.8%1.27M after2 lots10b5-1
Sep 3, 2024 (view filing)Aug 29-305 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+15.0K$0.7633+$11.4K+1.2%1.25M after3 lots10b5-1
Aug 29, 2024 (view filing)Aug 27-282 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.795+$7.95K+0.8%1.25M after2 lots10b5-1
Aug 27, 2024 (view filing)Aug 23-264 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.805+$8.05K+0.8%1.24M after2 lots10b5-1
Aug 23, 2024 (view filing)Aug 21-222 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.755+$7.55K+0.8%1.23M after2 lots10b5-1
Aug 21, 2024 (view filing)Aug 19-202 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.88+$8.80K+0.8%1.22M after2 lots10b5-1
Aug 19, 2024 (view filing)Aug 15-164 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.80+$8.00K+0.8%1.21M after2 lots10b5-1
Aug 15, 2024 (view filing)Aug 13-142 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.72+$7.20K+0.8%1.20M after2 lots10b5-1
Aug 13, 2024 (view filing)Aug 9-124 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.765+$7.65K+0.8%1.19M after2 lots10b5-1
Aug 9, 2024 (view filing)Aug 7-82 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.725+$7.25K+0.9%1.18M after2 lots10b5-1
Aug 7, 2024 (view filing)Aug 5-62 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.785+$7.85K+0.9%1.17M after2 lots10b5-1
Aug 5, 2024 (view filing)Aug 1-24 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.81+$8.10K+0.9%1.16M after2 lots10b5-1
Aug 1, 2024 (view filing)Jul 30-312 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.77+$7.70K+0.9%1.15M after2 lots10b5-1
Jul 30, 2024 (view filing)Jul 26-294 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.64+$6.40K+0.9%1.14M after2 lots10b5-1
Jul 26, 2024 (view filing)Jul 24-252 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.62+$6.20K+0.9%1.13M after2 lots10b5-1
Jul 24, 2024 (view filing)Jul 22-232 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.585+$5.85K+0.9%1.12M after2 lots10b5-1
Jul 22, 2024 (view filing)Jul 18-194 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.585+$5.85K+0.9%1.11M after2 lots10b5-1
Jul 18, 2024 (view filing)Jul 16-172 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.58+$5.80K+0.9%1.10M after2 lots10b5-1
Jul 16, 2024 (view filing)Jul 12-154 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.54+$5.40K+0.9%1.09M after2 lots10b5-1
Jul 12, 2024 (view filing)2:42 PM ETJul 10-112 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.42+$4.20K+0.9%1.08M after2 lots10b5-1
Jul 10, 2024 (view filing)12:52 PM ETJul 8-92 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.355+$3.55K+0.9%1.07M after2 lots10b5-1
Jul 8, 2024 (view filing)2:47 PM ETJul 3-55 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+10.0K$0.385+$3.85K+1.0%1.06M after2 lots10b5-1
Feb 27, 2024 (view filing)2:56 PM ETFeb 26-271 dayJensen GlennVP, OperationsPPurchase+16.8K$0.3102+$5.22K+4,489.3%17.2K after2 lots
Dec 19, 2023 (view filing)Dec 154 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+400.0K$1.00+$400.0K+61.8%1.05M after
Dec 4, 2023 (view filing)Dec 13 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+39.5K$0.90+$35.5K+6.5%646.7K after
Sep 18, 2023 (view filing)Sep 153 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+3.25K$0.85+$2.76K+0.5%594.5K after
Sep 14, 2023 (view filing)Sep 13-141 dayDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+5.50K$0.83+$4.56K+0.9%591.2K after2 lots
Sep 12, 2023 (view filing)Sep 11-121 dayDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+399$0.8193+$326.89+0.1%585.7K after2 lots
Sep 8, 2023 (view filing)Sep 7-81 dayDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+20.5K$0.755+$15.4K+3.6%585.3K after2 lots
Sep 7, 2023 (view filing)Sep 5-62 daysDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+18.5K$0.6695+$12.4K+3.4%564.9K after2 lots
Dec 1, 2021 (view filing)Nov 301 dayDavis Michael ADirector, 10% OwnerPPurchaseCyanotech Corporation Common Stock+36.0K$3.51+$126.4K+158.0%58.8K after2 lots