9 insiders reported 33 Form 4 transactions for CYANOTECH CORP (CYAN) over the past 18 months (most recent 2025-09-02). Recent activity: Vied David L (Director) Buy 50,000 shares, MULDER DAVID M (Director) Buy 50,000 shares, DAVIS MICHAEL A / (Director) Buy 50,000 shares, Nordin Amy Beth (VP, HR, Secretary) Buy 1,502 shares, Nordin Amy Beth (VP, HR, Secretary) Sell 525 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2025-09-02 | Vied David L | Director | Buy | 50,000 | $0 |
| 2025-09-02 | MULDER DAVID M | Director | Buy | 50,000 | $0 |
| 2025-09-02 | DAVIS MICHAEL A / | Director | Buy | 50,000 | $0 |
| 2025-07-31 | Nordin Amy Beth | VP, HR, Secretary | Buy | 1,502 | $0 |
| 2025-07-31 | Nordin Amy Beth | VP, HR, Secretary | Sell | 525 | $215 |
| 2025-07-31 | Custer Matthew Keith | President and CEO | Buy | 2,075 | $0 |
| 2025-07-31 | Cysewski Gerald R | Insider | Buy | 1,577 | $0 |
| 2025-07-31 | Cysewski Gerald R | Insider | Sell | 592 | $243 |
| 2025-07-31 | Jensen Glenn | VP, Operations | Buy | 1,642 | $0 |
| 2025-07-31 | Jensen Glenn | VP, Operations | Sell | 617 | $253 |
| 2025-07-31 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | Buy | 1,380 | $0 |
| 2025-07-31 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | Sell | 518 | $212 |
| 2025-04-09 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | Buy | 33 | $0 |
| 2025-04-09 | Cysewski Gerald R | Insider | Buy | 33 | $0 |
| 2025-04-09 | Cysewski Gerald R | Insider | Sell | 13 | $4 |
| 2025-04-09 | Kakuk Collette Nicole | Chief Strategic Comml Officer | Buy | 33 | $0 |
| 2025-04-09 | Kakuk Collette Nicole | Chief Strategic Comml Officer | Sell | 14 | $4 |
| 2025-04-09 | Custer Matthew Keith | President and CEO | Buy | 33 | $0 |
| 2025-04-09 | Nordin Amy Beth | VP, HR, Secretary | Buy | 33 | $0 |
| 2025-04-09 | Nordin Amy Beth | VP, HR, Secretary | Sell | 12 | $4 |
| 2025-04-09 | Jensen Glenn | VP, Operations | Buy | 33 | $0 |
| 2025-04-09 | Jensen Glenn | VP, Operations | Sell | 13 | $4 |
| 2025-04-09 | Johansen Jennifer M. | VP, Quality, Regulatory & Govt | Sell | 13 | $4 |
| 2025-02-20 | Kakuk Collette Nicole | Chief Strategic Comml Officer | Sell | 1,556 | $622 |
| 2025-02-20 | Kakuk Collette Nicole | Chief Strategic Comml Officer | Buy | 3,900 | $0 |
Source: SEC Form 4 filings · as of 2025-09-02
