Figures computed from official regulatory filings — .
Ownershipinsiders 32.77% · institutions 0% · short 0.0% of float
In USD · as of Oct 5, 2026
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Cyanotech Corporation, an agricultural company, engages in the production and sale of natural ingredients and dietary supplement products from microalgae for health and wellness markets. The company offers BioAstin Hawaiian Astaxanthin, a natural antioxidant to enhance skin, and to support eye, joint, brain, and immune health; and Hawaiian Spirulina Pacifica, a nutrient-rich dietary supplement to support natural energy, immune system, and cardiovascular health, as well as a source of protein, antioxidant carotenoids, and essential nutrients. It also provides contract extraction, and research and development services. The company sells its products through distributors, retailers, and online channels; direct to consumers; and in bulk form to manufacturers, formulators, and distributors in the health food, cosmetic manufacturers and nutraceuticals, and dietary supplement markets. It operates in the United States, the Asia-Pacific, Europe, and internationally. Cyanotech Corporation was incorporated in 1983 and is headquartered in Kailua-Kona, Hawaii.
Market information source · Oct 5, 2026
SEC company identity · Oct 5, 2026
Open-market timeline · full history
361 buys4 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| Miyashiro Jennifer A.S. | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| MULDER DAVID M | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Vied David L | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| DAVIS MICHAEL A /track record | Award | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Custer Matthew Keith | Exercise | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Johansen Jennifer M. | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Cysewski Gerald R | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Jensen Glenn | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Cysewski Gerald R | Exercise | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Jensen Glenn | Other | $253 | SEC |
| Johansen Jennifer M. | Other | $212.4 | SEC |
| Jensen Glenn | Exercise | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Nordin Amy Beth | Other | $215.3 | SEC |
| Johansen Jennifer M. | Exercise | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Nordin Amy Beth | Exercise | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Cysewski Gerald R | Other | $242.7 | SEC |
| Custer Matthew Keith | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Nordin Amy Beth | ExerciseD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Custer Matthew Keith | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Custer Matthew Keith | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Jensen Glenn | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Nordin Amy Beth | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Brand Jennifer Kimberly | AwardD (derivative) | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Jensen Glenn | Other | $4 | SEC |
| Cysewski Gerald R | Other | $4 | SEC |