Cyanotech Corp. (CYAN) Insider Trading
Directors, officers and holders of more than 10% of CYAN report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 86 transactions on file: 0 with code P, 0 with code S and 50 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 12, 2025 | Miyashiro Jennifer A.S. | CFO, VP Fin & Admin, Treasurer | A Award | 50,000 | Not measured | Not measured |
| Aug 28, 2025 | DAVIS MICHAEL A / | Director | A Award | 125 | Not measured | Not measured |
| Aug 28, 2025 | Vied David L | Director | A Award | 125 | Not measured | Not measured |
| Aug 28, 2025 | MULDER DAVID M | Director | A Award | 125 | Not measured | Not measured |
| Jul 29, 2025 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | M Exercise | 3 | Not measured | Not measured |
| Jul 29, 2025 | Nordin Amy Beth | VP, HR, Secretary | F Tax Payment | 1 | $162.00 | $213 |
| Jul 29, 2025 | Nordin Amy Beth | VP, HR, Secretary | M Exercise | 4 | Not measured | Not measured |
| Jul 29, 2025 | Custer Matthew Keith | President and CEO | M Exercise | 5 | Not measured | Not measured |
| Jul 29, 2025 | Jensen Glenn | VP, Operations | F Tax Payment | 2 | $162.00 | $250 |
| Jul 29, 2025 | Cysewski Gerald R | Not stated | M Exercise | 4 | Not measured | Not measured |
| Jul 29, 2025 | Cysewski Gerald R | Not stated | F Tax Payment | 1 | $162.00 | $240 |
| Jul 29, 2025 | Jensen Glenn | VP, Operations | M Exercise | 4 | Not measured | Not measured |
| Jul 29, 2025 | Custer Matthew Keith | President and CEO | M Exercise | 2,075 | Not measured | Not measured |
| Jul 29, 2025 | Jensen Glenn | VP, Operations | M Exercise | 1,642 | Not measured | Not measured |
| Jul 29, 2025 | Cysewski Gerald R | Not stated | M Exercise | 1,577 | Not measured | Not measured |
| Jul 29, 2025 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | F Tax Payment | 1 | $162.00 | $210 |
| Jul 29, 2025 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | M Exercise | 1,380 | Not measured | Not measured |
| Jul 29, 2025 | Nordin Amy Beth | VP, HR, Secretary | M Exercise | 1,502 | Not measured | Not measured |
| Jun 16, 2025 | Custer Matthew Keith | President and CEO | A Award | 64,103 | Not measured | Not measured |
| Jun 16, 2025 | Custer Matthew Keith | President and CEO | A Award | 150,000 | Not measured | Not measured |
| May 19, 2025 | Jensen Glenn | VP, Operations | A Award | 25,000 | Not measured | Not measured |
| May 19, 2025 | Nordin Amy Beth | VP, HR, Secretary | A Award | 75,000 | Not measured | Not measured |
| May 19, 2025 | Brand Jennifer Kimberly | VP of Sales | A Award | 50,000 | Not measured | Not measured |
| Apr 7, 2025 | Jensen Glenn | VP, Operations | M Exercise | 0 | Not measured | Not measured |
| Apr 7, 2025 | Nordin Amy Beth | VP, HR, Secretary | M Exercise | 0 | Not measured | Not measured |
| Apr 7, 2025 | Nordin Amy Beth | VP, HR, Secretary | F Tax Payment | 0 | $124.00 | $4 |
| Apr 7, 2025 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | M Exercise | 0 | Not measured | Not measured |
| Apr 7, 2025 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | F Tax Payment | 0 | $124.00 | $4 |
| Apr 7, 2025 | Jensen Glenn | VP, Operations | F Tax Payment | 0 | $124.00 | $4 |
| Apr 7, 2025 | Custer Matthew Keith | President and CEO | M Exercise | 0 | Not measured | Not measured |
| Apr 7, 2025 | Kakuk Collette Nicole | Chief Strategic Comml Officer | M Exercise | 0 | Not measured | Not measured |
| Apr 7, 2025 | Kakuk Collette Nicole | Chief Strategic Comml Officer | F Tax Payment | 0 | $124.00 | $4 |
| Apr 7, 2025 | Cysewski Gerald R | Not stated | M Exercise | 0 | Not measured | Not measured |
| Apr 7, 2025 | Cysewski Gerald R | Not stated | F Tax Payment | 0 | $124.00 | $4 |
| Apr 7, 2025 | Nordin Amy Beth | VP, HR, Secretary | M Exercise | 33 | Not measured | Not measured |
| Apr 7, 2025 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | M Exercise | 33 | Not measured | Not measured |
| Apr 7, 2025 | Jensen Glenn | VP, Operations | M Exercise | 33 | Not measured | Not measured |
| Apr 7, 2025 | Custer Matthew Keith | President and CEO | M Exercise | 33 | Not measured | Not measured |
| Apr 7, 2025 | Kakuk Collette Nicole | Chief Strategic Comml Officer | M Exercise | 33 | Not measured | Not measured |
| Apr 7, 2025 | Cysewski Gerald R | Not stated | M Exercise | 33 | Not measured | Not measured |
| Feb 18, 2025 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | F Tax Payment | 3 | $160.00 | $480 |
| Feb 18, 2025 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | M Exercise | 8 | Not measured | Not measured |
| Feb 18, 2025 | Jensen Glenn | VP, Operations | M Exercise | 9 | Not measured | Not measured |
| Feb 18, 2025 | Jensen Glenn | VP, Operations | F Tax Payment | 3 | $160.00 | $536 |
| Feb 18, 2025 | Cysewski Gerald R | Not stated | M Exercise | 3,900 | Not measured | Not measured |
| Feb 18, 2025 | Jensen Glenn | VP, Operations | M Exercise | 3,570 | Not measured | Not measured |
| Feb 18, 2025 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | M Exercise | 3,200 | Not measured | Not measured |
| Feb 18, 2025 | Nordin Amy Beth | VP, HR, Secretary | M Exercise | 3,400 | Not measured | Not measured |
| Feb 18, 2025 | Kakuk Collette Nicole | Chief Strategic Comml Officer | M Exercise | 3,900 | Not measured | Not measured |
| Feb 18, 2025 | Kakuk Collette Nicole | Chief Strategic Comml Officer | M Exercise | 10 | Not measured | Not measured |
The full Form 4 history is on the CYAN company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.