Davis Michael A / insider trades
Davis Michael A / has filed 46 Form 4s with the SEC that we hold, all for Cyanotech Corp (CYAN), as Director, 10% owner. Across all of them we count 76 purchases worth $758.3K and 0 sales worth $0 reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a purchase of 400,000 shares of Cyanotech Corp worth $400.0K, dated 2023-12-15. The first filing on our record is dated 2021-10-20 and the latest 2025-09-02.
Cyanotech Corp (CYAN)
Director, 10% owner · 46 filings · 76 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-11-30 | P, purchase reported on Form 4 | 18,000 | $63.2K | 2021-12-01 |
| 2023-09-05 | P, purchase reported on Form 4 | 12,673 | $8.4K | 2023-09-07 |
| 2023-09-06 | P, purchase reported on Form 4 | 5,847 | $4.0K | 2023-09-07 |
| 2023-09-07 | P, purchase reported on Form 4 | 17,900 | $13.4K | 2023-09-08 |
| 2023-09-08 | P, purchase reported on Form 4 | 2,553 | $2.0K | 2023-09-08 |
| 2023-09-11 | P, purchase reported on Form 4 | 292 | $242 | 2023-09-12 |
| 2023-09-12 | P, purchase reported on Form 4 | 107 | $85 | 2023-09-12 |
| 2023-09-13 | P, purchase reported on Form 4 | 3,245 | $2.7K | 2023-09-14 |
| 2023-09-14 | P, purchase reported on Form 4 | 2,253 | $1.9K | 2023-09-14 |
| 2023-09-15 | P, purchase reported on Form 4 | 3,245 | $2.8K | 2023-09-18 |
| 2023-12-01 | P, purchase reported on Form 4 | 39,455 | $35.5K | 2023-12-04 |
| 2023-12-15 | P, purchase reported on Form 4 | 400,000 | $400.0K | 2023-12-19 |
| 2024-07-03 | P, purchase reported on Form 4 | 5,000 | $1.9K | 2024-07-08 |
| 2024-07-05 | P, purchase reported on Form 4 | 5,000 | $2.0K | 2024-07-08 |
| 2024-07-08 | P, purchase reported on Form 4 | 5,000 | $1.6K | 2024-07-10 |
| 2024-07-09 | P, purchase reported on Form 4 | 5,000 | $1.9K | 2024-07-10 |
| 2024-07-10 | P, purchase reported on Form 4 | 5,000 | $1.9K | 2024-07-12 |
| 2024-07-11 | P, purchase reported on Form 4 | 5,000 | $2.2K | 2024-07-12 |
| 2024-07-12 | P, purchase reported on Form 4 | 5,000 | $2.8K | 2024-07-16 |
| 2024-07-15 | P, purchase reported on Form 4 | 5,000 | $2.6K | 2024-07-16 |
| 2024-07-16 | P, purchase reported on Form 4 | 5,000 | $2.8K | 2024-07-18 |
| 2024-07-17 | P, purchase reported on Form 4 | 5,000 | $3.0K | 2024-07-18 |
| 2024-07-18 | P, purchase reported on Form 4 | 5,000 | $2.9K | 2024-07-22 |
| 2024-07-19 | P, purchase reported on Form 4 | 5,000 | $3.0K | 2024-07-22 |
| 2024-07-22 | P, purchase reported on Form 4 | 5,000 | $3.0K | 2024-07-24 |
| 2024-07-23 | P, purchase reported on Form 4 | 5,000 | $2.9K | 2024-07-24 |
| 2024-07-24 | P, purchase reported on Form 4 | 5,000 | $3.0K | 2024-07-26 |
| 2024-07-25 | P, purchase reported on Form 4 | 5,000 | $3.2K | 2024-07-26 |
| 2024-07-26 | P, purchase reported on Form 4 | 5,000 | $3.2K | 2024-07-30 |
| 2024-07-29 | P, purchase reported on Form 4 | 5,000 | $3.2K | 2024-07-30 |
| 2024-07-30 | P, purchase reported on Form 4 | 5,000 | $3.5K | 2024-08-01 |
| 2024-07-31 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-08-01 |
| 2024-08-01 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-08-05 |
| 2024-08-02 | P, purchase reported on Form 4 | 5,000 | $4.0K | 2024-08-05 |
| 2024-08-05 | P, purchase reported on Form 4 | 5,000 | $3.9K | 2024-08-07 |
| 2024-08-06 | P, purchase reported on Form 4 | 5,000 | $4.0K | 2024-08-07 |
| 2024-08-07 | P, purchase reported on Form 4 | 5,000 | $3.5K | 2024-08-09 |
| 2024-08-08 | P, purchase reported on Form 4 | 5,000 | $3.8K | 2024-08-09 |
| 2024-08-09 | P, purchase reported on Form 4 | 5,000 | $4.0K | 2024-08-13 |
| 2024-08-12 | P, purchase reported on Form 4 | 5,000 | $3.7K | 2024-08-13 |
| 2024-08-13 | P, purchase reported on Form 4 | 5,000 | $3.7K | 2024-08-15 |
| 2024-08-14 | P, purchase reported on Form 4 | 5,000 | $3.5K | 2024-08-15 |
| 2024-08-15 | P, purchase reported on Form 4 | 5,000 | $3.8K | 2024-08-19 |
| 2024-08-16 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-08-19 |
| 2024-08-19 | P, purchase reported on Form 4 | 5,000 | $4.5K | 2024-08-21 |
| 2024-08-20 | P, purchase reported on Form 4 | 5,000 | $4.3K | 2024-08-21 |
| 2024-08-21 | P, purchase reported on Form 4 | 5,000 | $3.8K | 2024-08-23 |
| 2024-08-22 | P, purchase reported on Form 4 | 5,000 | $3.8K | 2024-08-23 |
| 2024-08-23 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-08-27 |
| 2024-08-26 | P, purchase reported on Form 4 | 5,000 | $3.9K | 2024-08-27 |
| 2024-08-27 | P, purchase reported on Form 4 | 5,000 | $4.0K | 2024-08-29 |
| 2024-08-28 | P, purchase reported on Form 4 | 5,000 | $4.0K | 2024-08-29 |
| 2024-08-29 | P, purchase reported on Form 4 | 5,000 | $3.8K | 2024-09-03 |
| 2024-08-30 | P, purchase reported on Form 4 | 5,000 | $4.0K | 2024-09-03 |
| 2024-09-03 | P, purchase reported on Form 4 | 5,000 | $4.0K | 2024-09-05 |
| 2024-09-04 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-09-05 |
| 2024-09-05 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-09-09 |
| 2024-09-06 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-09-09 |
| 2024-09-09 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-09-11 |
| 2024-09-10 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-09-11 |
| 2024-09-11 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-09-13 |
| 2024-09-12 | P, purchase reported on Form 4 | 5,000 | $4.2K | 2024-09-13 |
| 2024-09-13 | P, purchase reported on Form 4 | 5,000 | $4.1K | 2024-09-17 |
| 2024-09-16 | P, purchase reported on Form 4 | 5,000 | $4.1K | 2024-09-17 |
| 2024-09-17 | P, purchase reported on Form 4 | 1,000 | $720 | 2024-09-19 |
| 2024-09-17 | P, purchase reported on Form 4 | 4,000 | $3.0K | 2024-09-19 |
| 2024-09-18 | P, purchase reported on Form 4 | 5,000 | $3.9K | 2024-09-19 |
| 2024-09-19 | P, purchase reported on Form 4 | 5,000 | $3.7K | 2024-09-23 |
| 2024-09-20 | P, purchase reported on Form 4 | 5,000 | $3.9K | 2024-09-23 |
| 2024-09-23 | P, purchase reported on Form 4 | 5,000 | $3.9K | 2024-09-25 |
| 2024-09-24 | P, purchase reported on Form 4 | 5,000 | $3.6K | 2024-09-25 |
| 2024-09-25 | P, purchase reported on Form 4 | 5,000 | $3.9K | 2024-09-27 |
| 2024-09-26 | P, purchase reported on Form 4 | 5,000 | $3.9K | 2024-09-27 |
| 2024-09-27 | P, purchase reported on Form 4 | 5,000 | $3.9K | 2024-10-01 |
| 2024-09-30 | P, purchase reported on Form 4 | 5,000 | $3.8K | 2024-10-01 |
| 2024-10-01 | P, purchase reported on Form 4 | 5,000 | $3.8K | 2024-10-03 |
Source
Counted from the Form 4 filings this reporting owner (SEC CIK 1201156) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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