CALVERT DENNIS P (CIK 1228572) reported 5 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-07-02). Recent activity: Buy BLGO (699,569 shares), Buy BLGO (219,914 shares), Buy BLGO (130,222 shares), Buy BLGO (310,269 shares), Buy BLGO (169,498 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-02 | BIOLARGO, INC. (BLGO) | President | Buy | 699,569 | $79,401 |
| 2026-07-02 | BIOLARGO, INC. (BLGO) | President | Buy | 219,914 | $24,850 |
| 2026-01-05 | BIOLARGO, INC. (BLGO) | President | Buy | 130,222 | $23,440 |
| 2025-11-17 | BIOLARGO, INC. (BLGO) | President | Buy | 310,269 | $49,643 |
| 2025-07-16 | BIOLARGO, INC. (BLGO) | President | Buy | 169,498 | $33,900 |
Source: SEC Form 4 filings · as of 2026-07-02