OTC · CIK 0000768408
CYAN CYANOTECH CORP
Insider trading from SEC Form 4. Last filing Sep 16, 2025.
CYANOTECH CORP (CYAN) has 24 SEC Form 4 filings on file from 11 insiders, the latest filed on Sep 16, 2025. No insider bought or sold on the open market in the last 90 days; rows filed in that time are grants, exercises, tax withholding and other transactions that carry no view on the price.
Last 90 days
Net insider value
$0
no open-market trades
Buys
0
$0 by 0 insiders
Sells
0
$0 by 0 insiders
Insiders on file
11
with a Form 4 at this company
Signals
Open-market buys and sells at CYANOTECH CORP, scored.
No scored open-market trades yet. Grants, exercises and other rows are below.
Transactions
The newest 50 of 55 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 12, 2025 | Jennifer A.S. Miyashiro CFO, VP Fin & Admin, Treasurer | AGrant or award Cyanotech Common Stock Optionsderivative | +50,000 | $0.00 | $0 | 50,000 | Sep 16, 2025 |
| Aug 28, 2025 | David M Mulder director | AGrant or award Cyanotech Corporation Common Stock | +50,000 | $0.00 | $0 | 203,468 | Sep 2, 2025 |
| Aug 28, 2025 | David L Vied director | AGrant or award Cyanotech Corporation Common Stock | +50,000 | $0.00 | $0 | 225,138 | Sep 2, 2025 |
| Aug 28, 2025 | Michael A / Davis director, owner | AGrant or award Cyanotech Corporation Common Stockindirect: By self as trustee of the Michael Arlen Davis Revocable Trust | +50,000 | $0.00 | $0 | 1,528,598 | Sep 2, 2025 |
| Jul 29, 2025 | Matthew Keith Custer President and CEO | MOption exercise Common Stock | +2,075 | $0.00 | $0 | 6,754 | Jul 31, 2025 |
| Jul 29, 2025 | Jennifer M. Johansen VP, Quality, Regulatory & Govt | MOption exercise Common Stock | +1,380 | $0.00 | $0 | 10,261 | Jul 31, 2025 |
| Jul 29, 2025 | Glenn Jensen VP, Operations | MOption exercise Common Stock | +1,642 | $0.00 | $0 | 27,727 | Jul 31, 2025 |
| Jul 29, 2025 | Amy Beth Nordin VP, HR, Secretary | MOption exercise Common Stock | +1,502 | $0.00 | $0 | 9,576 | Jul 31, 2025 |
| Jul 29, 2025 | Gerald R Cysewski other | MOption exercise Common Stock | +1,577 | $0.00 | $0 | 147,289 | Jul 31, 2025 |
| Jul 29, 2025 | Matthew Keith Custer President and CEO | MOption exercise Restricted Stock Unitsderivative | -2,075 | $0.00 | $0 | 64,137 | Jul 31, 2025 |
| Jul 29, 2025 | Jennifer M. Johansen VP, Quality, Regulatory & Govt | FTax withholding Common Stock | -518 | $0.41 | $210 | 9,743 | Jul 31, 2025 |
| Jul 29, 2025 | Gerald R Cysewski other | FTax withholding Common Stock | -592 | $0.41 | $240 | 146,697 | Jul 31, 2025 |
| Jul 29, 2025 | Amy Beth Nordin VP, HR, Secretary | FTax withholding Common Stock | -525 | $0.41 | $213 | 9,051 | Jul 31, 2025 |
| Jul 29, 2025 | Amy Beth Nordin VP, HR, Secretary | MOption exercise Restricted Stock Unitsderivative | -1,502 | $0.00 | $0 | 34 | Jul 31, 2025 |
| Jul 29, 2025 | Glenn Jensen VP, Operations | FTax withholding Common Stock | -617 | $0.41 | $250 | 27,110 | Jul 31, 2025 |
| Jul 29, 2025 | Jennifer M. Johansen VP, Quality, Regulatory & Govt | MOption exercise Restricted Stock Unitsderivative | -1,380 | $0.00 | $0 | 34 | Jul 31, 2025 |
| Jul 29, 2025 | Gerald R Cysewski other | MOption exercise Restricted Stock Unitsderivative | -1,577 | $0.00 | $0 | 34 | Jul 31, 2025 |
| Jul 29, 2025 | Glenn Jensen VP, Operations | MOption exercise Restricted Stock Unitsderivative | -1,642 | $0.00 | $0 | 34 | Jul 31, 2025 |
| Jun 16, 2025 | Matthew Keith Custer President and CEO | AGrant or award Cyanotech common stock optionsderivative | +150,000 | $0.00 | $0 | 150,000 | Jun 18, 2025 |
| Jun 16, 2025 | Matthew Keith Custer President and CEO | AGrant or award Restricted Stock Unitsderivative | +64,103 | $0.00 | $0 | 4,679 | Jun 18, 2025 |
| May 19, 2025 | Jennifer Kimberly Brand VP of Sales | AGrant or award Cyanotech common stock optionsderivative | +50,000 | $0.00 | $0 | 50,000 | May 21, 2025 |
| May 19, 2025 | Glenn Jensen VP, Operations | AGrant or award Cyanotech common stock optionsderivative | +25,000 | $0.00 | $0 | 25,000 | May 21, 2025 |
| May 19, 2025 | Amy Beth Nordin VP, HR, Secretary | AGrant or award Cyanotech common stock optionsderivative | +75,000 | $0.00 | $0 | 75,000 | May 21, 2025 |
| Apr 7, 2025 | Jennifer M. Johansen VP, Quality, Regulatory & Govt | MOption exercise Common Stock | +33 | $0.00 | $0 | 8,894 | Apr 9, 2025 |
| Apr 7, 2025 | Amy Beth Nordin VP, HR, Secretary | MOption exercise Common Stock | +33 | $0.00 | $0 | 8,086 | Apr 9, 2025 |
| Apr 7, 2025 | Collette Nicole Kakuk Chief Strategic Comml Officer | MOption exercise Common Stock | +33 | $0.00 | $0 | 4,721 | Apr 9, 2025 |
| Apr 7, 2025 | Gerald R Cysewski other | MOption exercise Common Stock | +33 | $0.00 | $0 | 145,725 | Apr 9, 2025 |
| Apr 7, 2025 | Matthew Keith Custer President and CEO | MOption exercise Common Stock | +33 | $0.00 | $0 | 4,679 | Apr 9, 2025 |
| Apr 7, 2025 | Glenn Jensen VP, Operations | MOption exercise Common Stock | +33 | $0.00 | $0 | 26,098 | Apr 9, 2025 |
| Apr 7, 2025 | Jennifer M. Johansen VP, Quality, Regulatory & Govt | FTax withholding Common Stock | -13 | $0.31 | $4 | 8,881 | Apr 9, 2025 |
| Apr 7, 2025 | Amy Beth Nordin VP, HR, Secretary | FTax withholding Common Stock | -12 | $0.31 | $4 | 8,074 | Apr 9, 2025 |
| Apr 7, 2025 | Collette Nicole Kakuk Chief Strategic Comml Officer | FTax withholding Common Stock | -14 | $0.31 | $4 | 4,707 | Apr 9, 2025 |
| Apr 7, 2025 | Gerald R Cysewski other | FTax withholding Common Stock | -13 | $0.31 | $4 | 145,712 | Apr 9, 2025 |
| Apr 7, 2025 | Matthew Keith Custer President and CEO | MOption exercise Restricted Stock Unitsderivative | -33 | $0.00 | $0 | 2,109 | Apr 9, 2025 |
| Apr 7, 2025 | Glenn Jensen VP, Operations | FTax withholding Common Stock | -13 | $0.31 | $4 | 26,085 | Apr 9, 2025 |
| Apr 7, 2025 | Jennifer M. Johansen VP, Quality, Regulatory & Govt | MOption exercise Restricted Stock Unitsderivative | -33 | $0.00 | $0 | 1,414 | Apr 9, 2025 |
| Apr 7, 2025 | Amy Beth Nordin VP, HR, Secretary | MOption exercise Restricted Stock Unitsderivative | -33 | $0.00 | $0 | 1,536 | Apr 9, 2025 |
| Apr 7, 2025 | Collette Nicole Kakuk Chief Strategic Comml Officer | MOption exercise Restricted Stock Unitsderivative | -33 | $0.00 | $0 | 34 | Apr 9, 2025 |
| Apr 7, 2025 | Gerald R Cysewski other | MOption exercise Restricted Stock Unitsderivative | -33 | $0.00 | $0 | 1,611 | Apr 9, 2025 |
| Apr 7, 2025 | Glenn Jensen VP, Operations | MOption exercise Restricted Stock Unitsderivative | -33 | $0.00 | $0 | 1,676 | Apr 9, 2025 |
| Feb 18, 2025 | Gerald R Cysewski other | MOption exercise Common Stock | +3,900 | $0.00 | $0 | 147,156 | Feb 20, 2025 |
| Feb 18, 2025 | Glenn Jensen VP, Operations | MOption exercise Common Stock | +3,570 | $0.00 | $0 | 27,405 | Feb 20, 2025 |
| Feb 18, 2025 | Jennifer M. Johansen VP, Quality, Regulatory & Govt | MOption exercise Common Stock | +3,200 | $0.00 | $0 | 10,062 | Feb 20, 2025 |
| Feb 18, 2025 | Collette Nicole Kakuk Chief Strategic Comml Officer | MOption exercise Common Stock | +3,900 | $0.00 | $0 | 6,244 | Feb 20, 2025 |
| Feb 18, 2025 | Amy Beth Nordin VP, HR, Secretary | MOption exercise Common Stock | +3,400 | $0.00 | $0 | 9,242 | Feb 20, 2025 |
| Feb 18, 2025 | Gerald R Cysewski other | FTax withholding Common Stock | -1,464 | $0.40 | $586 | 145,692 | Feb 20, 2025 |
| Feb 18, 2025 | Glenn Jensen VP, Operations | FTax withholding Common Stock | -1,340 | $0.40 | $536 | 26,065 | Feb 20, 2025 |
| Feb 18, 2025 | Collette Nicole Kakuk Chief Strategic Comml Officer | FTax withholding Common Stock | -1,556 | $0.40 | $622 | 4,688 | Feb 20, 2025 |
| Feb 18, 2025 | Amy Beth Nordin VP, HR, Secretary | FTax withholding Common Stock | -1,189 | $0.40 | $476 | 8,053 | Feb 20, 2025 |
| Feb 18, 2025 | Jennifer M. Johansen VP, Quality, Regulatory & Govt | FTax withholding Common Stock | -1,201 | $0.40 | $480 | 8,861 | Feb 20, 2025 |
50 of 55 rows shown.
Insiders
Everyone who has filed a Form 4 here.
- Jennifer Kimberly BrandVP of Sales
- Matthew Keith CusterPresident and CEO
- Gerald R Cysewskiother
- Michael A / Davisdirector, owner
- Glenn JensenVP, Operations
- Jennifer M. JohansenVP, Quality, Regulatory & Govt
- Collette Nicole KakukChief Strategic Comml Officer
- David M Mulderdirector
- Jennifer A.S. MiyashiroCFO, VP Fin & Admin, Treasurer
- Amy Beth NordinVP, HR, Secretary
- David L Vieddirector
Questions about CYAN
Answered from the filings on this page, as of the latest one.
Are insiders buying CYAN?
No. In the last 90 days no insider at CYANOTECH CORP bought or sold shares on the open market according to SEC Form 4 filings. The rows on file from that period are grants, exercises, tax withholding or other transactions, which carry no view on the price.
Who was the last insider to trade CYAN on the open market?
No open-market trade has been scored at CYANOTECH CORP. The latest Form 4 on file was filed on Sep 16, 2025 and holds grants, exercises or other rows that are not market trades.
How many insiders file Form 4 at CYANOTECH CORP?
11 people have filed a Form 4 at CYANOTECH CORP, among them Jennifer Kimberly Brand (VP of Sales), Matthew Keith Custer (President and CEO), Gerald R Cysewski (insider). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.