Across the past 12 months, Biolargo insiders reported no open-market purchases or sales.
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Kenneth Reay Code | Chief Science Officer | 51,528,564 | 0 | 51,528,564 | 68.4% | 07 Jul, 2026 |
| 2 | Dennis P Calvert | President | 23,850,038 | 0 | 23,850,038 | 31.6% | 02 Oct, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 30 Sep, 2026 | Dennis P Calvert | President | Acquired A | 931,886 | $0.08 | $74.55K | 11,989,994 | Direct |
| 30 Sep, 2026 | Jack B. Strommen | Director | Acquired A | 187,500 | — | — | 2,771,762 | Direct |
| 30 Sep, 2026 | Christina Elaine Bray | Director | Acquired A | 234,375 | — | — | 1,781,075 | Direct |
| 30 Sep, 2026 | Dennis P Calvert | President | Acquired G | 2,000,000 | $0.00 | $0 | 13,989,994 | Direct |
| 07 Jul, 2026 | Kenneth Reay Code | Chief Science Officer | Acquired A | 532,567 | $0.11 | $60.45K | 26,408,319 | Direct |
| 30 Jun, 2026 | Christina Elaine Bray | Director | Acquired A | 165,198 | — | — | 1,546,700 | Direct |
| 22 Jun, 2026 | Dennis E Marshall | Director | Acquired A | 40,909 | — | — | 5,463,738 | Direct |
| 31 Mar, 2026 | Dennis E Marshall | Director | Acquired A | 138,889 | — | — | 5,317,088 | Direct |
| 31 Mar, 2026 | Linda Park | Director | Acquired A | 115,741 | — | — | 1,381,502 | Direct |
| 31 Mar, 2026 | Dennis E Marshall | Director | Acquired A | 115,741 | — | — | 5,432,829 | Direct |
| 01 Feb, 2026 | Charles K Dargan | Chief Financial Officer | Acquired A | 300,000 | — | — | 5,931,668 | Direct |
| 31 Dec, 2025 | Christina Elaine Bray | Director | Acquired A | 101,736 | — | — | 1,265,761 | Direct |
| 31 Dec, 2025 | Jack B. Strommen | Director | Acquired A | 81,389 | — | — | 2,359,510 | Direct |
| 31 Dec, 2025 | Linda Park | Director | Acquired A | 101,736 | — | — | 1,265,761 | Direct |
| 31 Dec, 2025 | Dennis P Calvert | President | Acquired A | 130,222 | $0.18 | $24.00K | 10,523,625 | Direct |
| 31 Dec, 2025 | Dennis E Marshall | Director | Acquired A | 122,084 | — | — | 5,144,645 | Direct |
| 31 Dec, 2025 | Kenneth Reay Code | Chief Science Officer | Acquired A | 54,803 | $0.18 | $10.10K | 25,806,308 | Direct |
| 31 Dec, 2025 | Dennis E Marshall | Director | Acquired A | 101,736 | — | — | 5,246,381 | Direct |
| 14 Nov, 2025 | Kenneth Reay Code | Chief Science Officer | Acquired A | 313,754 | $0.16 | $50.20K | 25,751,505 | Direct |
| 14 Nov, 2025 | Dennis P Calvert | President | Acquired A | 310,269 | $0.16 | $49.64K | 10,393,403 | Direct |