Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| CYANOTECH CORPCYAN · Entity 8431 | Director · 10% owner | August 28, 2025 | September 02, 2025 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
CYANOTECH CORP
Report date August 28, 2025 · Filed September 02, 2025
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Cyanotech Corporation Common StockSEC Table I · non-derivative | IndirectBy self as trustee of the Michael Arlen Davis Revocable Trust | 1,528,598 |
Reported balance
After 2025-08-28 transaction · row 1
Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source rowRow 1 · 2025-08-28 · Grant · Acquired 50,000 · Balance 1,528,598 |
| Cyanotech Corporation Common StockSEC Table I · non-derivative | Direct | 12,119 |
Reported balance
Holding disclosure · report date 2025-08-28 · row 2
Holding and transaction disclosures are not merged.
1 source rowRow 2 · Balance 12,119 |
| Cyanotech Corporation Common StockSEC Table I · non-derivative | IndirectBy Spouse | 31,250 |
Reported balance
Holding disclosure · report date 2025-08-28 · row 3
Holding and transaction disclosures are not merged.
1 source rowRow 3 · Balance 31,250 |
| Cyanotech Corporation Common StockSEC Table I · non-derivative | IndirectBy self as co-trustee for the Nyracai Davis Irr. Trust and the Nettizanne J. Davis Irr. Trust | 150,000 |
Reported balance
Holding disclosure · report date 2025-08-28 · row 4
Holding and transaction disclosures are not merged.
1 source rowRow 4 · Balance 150,000 |
| Cyanotech Corporation Common StockSEC Table I · non-derivative | IndirectBy self as trustee for Nettizanne Johnstone Davis GST Exempt Trust | 58,000 |
Reported balance
Holding disclosure · report date 2025-08-28 · row 5
Holding and transaction disclosures are not merged.
1 source rowRow 5 · Balance 58,000 |
| Cyanotech Corporation Common StockSEC Table I · non-derivative | IndirectBy self as trustee for Nyracai Johnstone Davis GST Exempt Trust | 58,789 |
Reported balance
Holding disclosure · report date 2025-08-28 · row 6
Holding and transaction disclosures are not merged.
1 source rowRow 6 · Balance 58,789 |
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| September 01, 2020 Filed Sep 2, 2020 15:37 UTC | CYANOTECH CORP CYAN · Entity 8431 | PurchaseCyanotech Corporation Common Stock | 1,707 | $2.46 | $4,192.56 |
DisclosureSEC source: 0001437749-20-019216 · rdgdoc.xml · nonDerivative · entry 4 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as trustee for Nyracai Johnstone Davis GST Exempt Trust Disclosed balance after: 6,707 F4 · price: The price reported is a weighted average price. These shares were bought in multiple transactions at prices ranging from $2.30 to $2.50, inclusive. Read SEC document |
| September 01, 2020 Filed Sep 2, 2020 15:37 UTC | CYANOTECH CORP CYAN · Entity 8431 | PurchaseCyanotech Corporation Common Stock | 1,916 | $2.44 | $4,672.55 |
DisclosureSEC source: 0001437749-20-019216 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as trustee for Nettizanne Johnstone Davis GST Exempt Trust Disclosed balance after: 6,916 F2 · price: The price reported is a weighted average price. These shares were bought in multiple transactions at prices ranging from $2.30 to $2.50, inclusive. Read SEC document |
| August 31, 2020 Filed Sep 2, 2020 15:37 UTC | CYANOTECH CORP CYAN · Entity 8431 | PurchaseCyanotech Corporation Common Stock | 5,000 | $2.42 | $12,115.50 |
DisclosureSEC source: 0001437749-20-019216 · rdgdoc.xml · nonDerivative · entry 3 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as trustee for Nyracai Johnstone Davis GST Exempt Trust Disclosed balance after: 5,000 F3 · price: The price reported is a weighted average price. These shares were bought in multiple transactions at prices ranging from $2.30 to $2.48, inclusive. Read SEC document |
| August 31, 2020 Filed Sep 2, 2020 15:37 UTC | CYANOTECH CORP CYAN · Entity 8431 | PurchaseCyanotech Corporation Common Stock | 5,000 | $2.43 | $12,154.00 |
DisclosureSEC source: 0001437749-20-019216 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as trustee for Nettizanne Johnstone Davis GST Exempt Trust Disclosed balance after: 5,000 F1 · price: The price reported is a weighted average price. These shares were bought in multiple transactions at prices ranging from $2.30 to $2.48, inclusive. The reporting person undertakes to provide to Cyanotech Corporation, any security holder of Cyanotech Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote and footnotes 2, 3 and 4. Read SEC document |
| August 27, 2020 Filed Aug 31, 2020 15:35 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 12,605 | $0.00 | $0.00 |
DisclosureSEC source: 0001437749-20-019010 · rdgdoc.xml · nonDerivative · entry 4 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as trustee of the Michael Arlen Davis Revocable Trust Disclosed balance after: 477,048 Read SEC document |
| February 18, 2020 Filed Feb 20, 2020 19:05 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 14,218 | $0.00 | $0.00 |
DisclosureSEC source: 0001437749-20-003209 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as trustee of the Michael Arlen Davis Revocable Trust Disclosed balance after: 464,443 Read SEC document |
| March 06, 2019 Filed Mar 8, 2019 21:12 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 9,282 | $4.02 | $37,306.21 |
DisclosureSEC source: 0001437749-19-004496 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 424,621 Read SEC document |
| March 04, 2019 Filed Mar 5, 2019 19:20 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 15,150 | $3.90 | $59,154.69 |
DisclosureSEC source: 0001437749-19-004123 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 415,339 Read SEC document |
| February 28, 2019 Filed Feb 28, 2019 18:04 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 36,556 | $3.90 | $142,553.78 |
DisclosureSEC source: 0001437749-19-003650 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 400,189 Read SEC document |
| February 27, 2019 Filed Feb 28, 2019 18:04 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 343 | $3.69 | $1,265.29 |
DisclosureSEC source: 0001437749-19-003650 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 363,633 Read SEC document |
| February 26, 2019 Filed Feb 26, 2019 17:53 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 111 | $3.65 | $405.15 |
DisclosureSEC source: 0001437749-19-003431 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 363,290 Read SEC document |
| February 25, 2019 Filed Feb 26, 2019 17:53 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 2,272 | $3.69 | $8,380.50 |
DisclosureSEC source: 0001437749-19-003431 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 363,179 Read SEC document |
| February 22, 2019 Filed Feb 22, 2019 17:40 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 503 | $3.64 | $1,830.92 |
DisclosureSEC source: 0001437749-19-003173 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 360,907 Read SEC document |
| February 21, 2019 Filed Feb 22, 2019 17:40 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 1,000 | $3.50 | $3,500.00 |
DisclosureSEC source: 0001437749-19-003173 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 360,404 Read SEC document |
| February 20, 2019 Filed Feb 20, 2019 18:51 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 1,849 | $3.49 | $6,453.01 |
DisclosureSEC source: 0001437749-19-002982 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 349,404 Read SEC document |
| February 20, 2019 Filed Feb 20, 2019 18:51 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 10,000 | $3.43 | $34,300.00 |
DisclosureSEC source: 0001437749-19-002982 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 359,404 Read SEC document |
| February 19, 2019 Filed Feb 20, 2019 18:51 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 10,900 | $3.34 | $36,406.00 |
DisclosureSEC source: 0001437749-19-002982 · rdgdoc.xml · nonDerivative · entry 5 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 338,455 Read SEC document |
| February 19, 2019 Filed Feb 20, 2019 18:51 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 6,600 | $3.35 | $22,110.00 |
DisclosureSEC source: 0001437749-19-002982 · rdgdoc.xml · nonDerivative · entry 4 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 345,055 Read SEC document |
| February 19, 2019 Filed Feb 20, 2019 18:51 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 2,500 | $3.32 | $8,300.00 |
DisclosureSEC source: 0001437749-19-002982 · rdgdoc.xml · nonDerivative · entry 3 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 347,555 Read SEC document |
| December 12, 2018 Filed Dec 12, 2018 17:53 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 3,748 | $3.69 | $13,845.49 |
DisclosureSEC source: 0001437749-18-021946 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 327,555 Read SEC document |
| December 11, 2018 Filed Dec 12, 2018 17:53 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 2,395 | $3.68 | $8,815.28 |
DisclosureSEC source: 0001437749-18-021946 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 323,807 Read SEC document |
| December 07, 2018 Filed Dec 7, 2018 16:48 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 5,390 | $3.72 | $20,026.55 |
DisclosureSEC source: 0001437749-18-021756 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 321,412 Read SEC document |
| December 06, 2018 Filed Dec 7, 2018 16:48 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 1,835 | $3.56 | $6,541.04 |
DisclosureSEC source: 0001437749-18-021756 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 316,022 Read SEC document |
| December 03, 2018 Filed Dec 3, 2018 20:27 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 618 | $3.61 | $2,232.90 |
DisclosureSEC source: 0001437749-18-021514 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 314,187 Read SEC document |
| November 30, 2018 Filed Dec 3, 2018 20:27 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 3,488 | $3.59 | $12,524.71 |
DisclosureSEC source: 0001437749-18-021514 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 313,569 Read SEC document |
| November 26, 2018 Filed Nov 27, 2018 18:16 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 1,778 | $3.45 | $6,131.97 |
DisclosureSEC source: 0001437749-18-021314 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 310,081 Read SEC document |
| November 19, 2018 Filed Nov 19, 2018 18:48 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 251 | $3.40 | $853.48 |
DisclosureSEC source: 0001437749-18-021098 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 308,303 Read SEC document |
| November 16, 2018 Filed Nov 19, 2018 18:48 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 8,052 | $3.53 | $28,430.00 |
DisclosureSEC source: 0001437749-18-021098 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 308,052 Read SEC document |
| August 27, 2018 Filed Aug 29, 2018 17:25 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 8,333 | $0.00 | $0.00 |
DisclosureSEC source: 0001437749-18-016354 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as trustee of the Michael Arlen Davis Revocable Trust Disclosed balance after: 450,225 Read SEC document |
| August 24, 2017 Filed Aug 25, 2017 16:17 UTC | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 6,383 | $0.00 | $0.00 |
DisclosureSEC source: 0001437749-17-015322 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as trustee of the Michael Arlen Davis Revocable Trust Disclosed balance after: 442,025 Read SEC document |
| August 24, 2017 Filed Oct 31, 2017 15:03 UTC Amendment | CYANOTECH CORP CYAN · Entity 8431 | GrantCyanotech Corporation Common Stock | 6,250 | $0.00 | $0.00 |
DisclosureSEC source: 0001437749-17-017950 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as trustee of the Michael Arlen Davis Revocable Trust Disclosed balance after: 441,892 F1 · shares: Due to a clerical error, the number of shares acquired was previously misreported as 6,383 shares in the reporting person's Form 4 filed on August 25, 2017. Read SEC document |
| August 22, 2017 Filed Aug 23, 2017 14:17 UTC | CYANOTECH CORP CYAN · Entity 8431 | GiftCyanotech Corporation Common Stock | 150,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001437749-17-015204 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc.(1) Disclosed balance after: 300,000 Read SEC document |
| December 16, 2016 Filed Dec 16, 2016 19:07 UTC | CYANOTECH CORP CYAN · Entity 8431 | GiftCyanotech Corporation Common Stock | 350,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001437749-16-043493 · rdgdoc.xml · nonDerivative · entry 2 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as director of Skywords Family Foundation Inc. (1) Disclosed balance after: 450,000 Read SEC document |
| December 16, 2016 Filed Dec 16, 2016 19:07 UTC | CYANOTECH CORP CYAN · Entity 8431 | GiftCyanotech Corporation Common Stock | 350,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001437749-16-043493 · rdgdoc.xml · nonDerivative · entry 1 DAVIS MICHAEL A / · CIK 0001201156 · Director · 10% owner 10b5-1 filing: Not disclosed Ownership: Indirect · By self as co-trustee of the Michael Arlen Davis Charitable Lead Annuity Trust Disclosed balance after: 0 Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.