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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.

Overview All Filings Annual Quarterly Insiders
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