Skip to contentCuster Matthew Keith — CYANOTECH CORP insider: 42 transactions · InsiderLensCuster Matthew Keith
- Director at CYANOTECH CORP · on record since Jun 22, 2022
- President and CEO at CYANOTECH CORP · on record since Nov 8, 2019
Insider trading activity of Custer Matthew Keith
- Transactions on record
- 42
- since Apr 9, 2020
- Open-market buys
- 0
- Open-market sells
- 0
- Companies traded
- 1
- last filing Jul 31, 2025
Figures computed from official regulatory filings — methodology.
Companies where Custer Matthew Keith has traded
Track record of Custer Matthew Keith
Insufficient history for a statistical track record (fewer than 5 open-market buys).
Transaction history of Custer Matthew Keith
Co-insiders of Custer Matthew Keith
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Cole Theron JCYANOTECH CORP
| Company | Filed | Type | Qty | Price | Value · USD | Src |
|---|
| Jul 31, 2025 | Exercise | 2,075 | 0.00 USD | $0 | SEC |
| Jul 31, 2025 | ExerciseD | -2,075 | 0.00 USD | $0 | SEC |
| Jun 18, 2025 | AwardD | 150,000 | 0.00 USD | $0 | SEC |
| Jun 18, 2025 | AwardD | 64,103 | 0.00 USD | $0 | SEC |
| Apr 9, 2025 | Exercise | 33 | 0.00 USD | $0 | SEC |
| Apr 9, 2025 | ExerciseD | -33 | 0.00 USD | $0 | SEC |
| Jul 31, 2024 | Other | -779 | 0.56 USD | $436.2 | SEC |
| Jul 31, 2024 | ExerciseD | -2,074 | 0.00 USD | $0 | SEC |
| Jul 31, 2024 | Exercise | 2,074 | 0.00 USD | $0 | SEC |
| Apr 10, 2024 | Other | -13 | 0.40 USD | $5.2 | SEC |
| Apr 10, 2024 | Exercise | 33 | 0.00 USD | $0 | SEC |
| Apr 10, 2024 | ExerciseD | -33 | 0.00 USD | $0 | SEC |
| Aug 1, 2023 | Exercise | 2,603 | 0.00 USD | $0 | SEC |
| Aug 1, 2023 | ExerciseD | -2,603 | 0.00 USD | $0 | SEC |
| Aug 1, 2023 | Other | -978 | 0.84 USD | $821.5 | SEC |
| Apr 10, 2023 | Other | -13 | 0.94 USD | $12.2 | SEC |
| Apr 10, 2023 | Exercise | 34 | 0.00 USD | $0 | SEC |
| Apr 10, 2023 | AwardD | 100 | 0.00 USD | $0 | SEC |
| Apr 10, 2023 | ExerciseD | -34 | 0.00 USD | $0 | SEC |
| Aug 2, 2022 | ExerciseD | -529 | 0.00 USD | $0 | SEC |
| Aug 2, 2022 | Exercise | 529 | 0.00 USD | $0 | SEC |
| Aug 2, 2022 | Other | -199 | 3.15 USD | $626.9 | SEC |
| Aug 2, 2022 | AwardD | 6,223 | 0.00 USD | $0 | SEC |
| Jun 22, 2022 | AwardD | 50,000 | 0.00 USD | $0 | SEC |
| Apr 8, 2022 | Exercise | 33 | 0.00 USD | $0 | SEC |