Matthew Keith Custer serves as Executive at CYANOTECH CORP, where they oversee executive responsibilities. Since joining the company, Matthew Keith Custer has executed 20 insider transactions totaling $0, demonstrating a balanced approach to their equity position. Their most recent transaction on Jul 29, 2025 involved exercising options for 2,075 shares valued at $0.
Matthew Keith Custer currently holds 6,754 shares of CYANOTECH CORP (CYAN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Matthew Keith Custer has been a net neutral trader of CYAN stock. They have purchased $0 and sold $0 worth of shares.
Matthew Keith Custer's most recent insider trade was on Jul 29, 2025, when they sold 2,075 shares at $0.00 per share.
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| $0.56 |
| Discretionary |
| Jul 29, 2024 | CYAN | $0 | Option Exercise | 2,074 | $N/A | Discretionary |
| Apr 8, 2024 | CYAN | $0 | Option Exercise | 33 | $N/A | Discretionary |
| Apr 8, 2024 | CYAN | $5 | Payment | 13 | $0.40 | Discretionary |
| Jul 31, 2023 | CYAN | $822 | Payment | 978 | $0.84 | Discretionary |
| Jul 31, 2023 | CYAN | $0 | Option Exercise | 2,603 | $N/A | Discretionary |
| Apr 6, 2023 | CYAN | $12 | Payment | 13 | $0.94 | Discretionary |
| Apr 6, 2023 | CYAN | $0 | Option Exercise | 34 | $N/A | Discretionary |
| Aug 1, 2022 | CYAN | $0 | Option Exercise | 529 | $N/A | Discretionary |
| Aug 1, 2022 | CYAN | $627 | Payment | 199 | $3.15 | Discretionary |
| Apr 6, 2022 | CYAN | $39 | Payment | 13 | $3.03 | Discretionary |
| Apr 6, 2022 | CYAN | $0 | Option Exercise | 33 | $N/A | Discretionary |
| Jul 30, 2021 | CYAN | $0 | Option Exercise | 530 | $N/A | Discretionary |
| Jul 13, 2021 | CYAN | $0 | Option Exercise | 254 | $N/A | Discretionary |
| Apr 6, 2021 | CYAN | $0 | Option Exercise | 33 | $N/A | Discretionary |
| Jul 13, 2020 | CYAN | $216 | Payment | 96 | $2.25 | Discretionary |
| Jul 13, 2020 | CYAN | $0 | Option Exercise | 254 | $N/A | Discretionary |
| Apr 6, 2020 | CYAN | $0 | Option Exercise | 40 | $N/A | Discretionary |
| Apr 6, 2020 | CYAN | $33 | Payment | 16 | $2.07 | Discretionary |