CYANOTECH CORP — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| MULDER DAVID M | — | Award / Grant | 50,000 | — | — | 203,468 | Aug 28, 2025 |
| Vied David L | — | Award / Grant | 50,000 | — | — | 225,138 | Aug 28, 2025 |
| DAVIS MICHAEL A / | — | Award / Grant | 50,000 | — | — | 1,528,598 | Aug 28, 2025 |
| Custer Matthew Keith | President and CEO | Option Exercise | 2,075 | — | — | 6,754 | Jul 29, 2025 |
| Nordin Amy Beth | VP, HR, Secretary | Tax Withholding | 525 | $0.41 | $215 | 9,051 | Jul 29, 2025 |
| Johansen Jennifer M. | VP, Quality, Regulatory & Govt | Tax Withholding | 518 | $0.41 | $212 | 9,743 | Jul 29, 2025 |
| Cysewski Gerald R | — | Tax Withholding | 592 | $0.41 | $243 | 146,697 | Jul 29, 2025 |
| Jensen Glenn | VP, Operations | Tax Withholding | 617 | $0.41 | $253 | 27,110 | Jul 29, 2025 |
| Kakuk Collette Nicole | Chief Strategic Comml Officer | Option Exercise | 33 | — | — | 4,721 | Apr 7, 2025 |
| Nordin Amy Beth | VP, HR, Secretary | Tax Withholding | 12 | $0.31 | $4 | 8,074 | Apr 7, 2025 |
| Johansen Jennifer M. | VP, Quality, Regulatory & Govt | Option Exercise | 33 | — | — | 8,894 | Apr 7, 2025 |
| Jensen Glenn | VP, Operations | Tax Withholding | 13 | $0.31 | $4 | 26,085 | Apr 7, 2025 |
| Custer Matthew Keith | President and CEO | Option Exercise | 33 | — | — | 4,679 | Apr 7, 2025 |
| Cysewski Gerald R | — | Option Exercise | 33 | — | — | 145,725 | Apr 7, 2025 |
| Kakuk Collette Nicole | Chief Strategic Comml Officer | Tax Withholding | 1,556 | $0.40 | $622 | 4,688 | Feb 18, 2025 |
| Nordin Amy Beth | VP, HR, Secretary | Option Exercise | 3,400 | — | — | 9,242 | Feb 18, 2025 |
| Johansen Jennifer M. | VP, Quality, Regulatory & Govt | Option Exercise | 3,200 | — | — | 10,062 | Feb 18, 2025 |
| Jensen Glenn | VP, Operations | Option Exercise | 3,570 | — | — | 27,405 | Feb 18, 2025 |
| Cysewski Gerald R | — | Tax Withholding | 1,464 | $0.40 | $586 | 145,692 | Feb 18, 2025 |
| DAVIS MICHAEL A / | — | Award / Grant | 13,158 | $0.76 | $10,000 | 1,478,598 | Oct 1, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.77 | $3,850 | 1,455,440 | Sep 30, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.77 | $3,850 | 1,445,440 | Sep 26, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.77 | $3,850 | 1,435,440 | Sep 24, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.74 | $3,700 | 1,425,440 | Sep 20, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 4,000 | $0.74 | $2,960 | 1,414,440 | Sep 18, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.82 | $4,100 | 1,405,440 | Sep 16, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.83 | $4,150 | 1,395,440 | Sep 12, 2024 |
| DAVIS MICHAEL A / | — | Award / Grant | 66,667 | $0.75 | $50,000 | 1,390,440 | Sep 10, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.84 | $4,200 | 1,308,773 | Sep 6, 2024 |
| Vied David L | — | Award / Grant | 39,506 | — | — | 175,138 | Sep 4, 2024 |
| MULDER DAVID M | — | Award / Grant | 39,506 | — | — | 153,468 | Sep 4, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.85 | $4,250 | 1,266,736 | Sep 3, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.75 | $3,750 | 1,251,736 | Aug 30, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.79 | $3,950 | 1,246,736 | Aug 27, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.77 | $3,850 | 1,236,736 | Aug 23, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.76 | $3,800 | 1,226,736 | Aug 21, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.89 | $4,450 | 1,211,736 | Aug 20, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.85 | $4,250 | 1,206,736 | Aug 15, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.74 | $3,700 | 1,191,736 | Aug 14, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.74 | $3,700 | 1,186,736 | Aug 9, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.75 | $3,750 | 1,176,736 | Aug 7, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.80 | $4,000 | 1,166,736 | Aug 5, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.79 | $3,950 | 1,156,736 | Aug 1, 2024 |
| DAVIS MICHAEL A / | — | Purchase | 5,000 | $0.83 | $4,150 | 1,146,736 | Jul 30, 2024 |
| Nordin Amy Beth | VP, HR, Secretary | Tax Withholding | 564 | $0.56 | $316 | 5,842 | Jul 29, 2024 |
| Ladin Felicia I | CFO, VP Fin & Admin, Treasurer | Tax Withholding | 656 | $0.56 | $367 | 4,678 | Jul 29, 2024 |
| Johansen Jennifer M. | VP, Quality, Regulatory & Govt | Option Exercise | 1,379 | — | — | 7,380 | Jul 29, 2024 |
| Jensen Glenn | VP, Operations | Tax Withholding | 616 | $0.56 | $345 | 23,835 | Jul 29, 2024 |
| Hartmann Charles Jason | VP, Sales & Marketing | Tax Withholding | 670 | $0.56 | $375 | 4,422 | Jul 29, 2024 |
| Cysewski Gerald R | — | Option Exercise | 1,576 | — | — | 143,848 | Jul 29, 2024 |