Marshall Dennis E has filed 19 insider transactions across 1 company since December 2023.
Most recent transaction: a grant/award of 115741 shares of BIOLARGO, INC. ($BLGO) on March 31, 2026.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 31, 2026 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 115741 | $0.00 | 5,432,829.0000 | 313,762,657 | 2.18% | 0.04% |
| March 31, 2026 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 138889 | $0.00 | 5,317,088.0000 | 313,762,657 | 2.68% | 0.04% |
| Dec. 31, 2025 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 122084 | $0.00 | 5,144,645.0000 | 313,762,657 | 2.43% | 0.04% |
| Dec. 31, 2025 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 101736 | $0.00 | 5,246,381.0000 | 313,762,657 | 1.98% | 0.03% |
| Sept. 30, 2025 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 110294 | $0.00 | 5,067,561.0000 | 301,303,131 | 2.22% | 0.04% |
| Sept. 30, 2025 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 132351 | $0.00 | 4,957,267.0000 | 301,303,131 | 2.74% | 0.04% |
| June 30, 2025 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 19000 | $0.00 | 4,717,566.0000 | 301,303,131 | 0.40% | 0.01% |
| June 30, 2025 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 112501 | $0.00 | 4,765,781.0000 | 301,303,131 | 2.42% | 0.04% |
| June 30, 2025 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 93750 | $0.00 | 4,859,531.0000 | 301,303,131 | 1.97% | 0.03% |
| Dec. 31, 2024 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 98684 | $0.00 | 4,624,625.0000 | 0 | 2.18% | 0.00% |
| Dec. 26, 2024 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 118422 | $0.00 | 4,525,941.0000 | 0 | 2.69% | 0.00% |
| Sept. 30, 2024 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 81522 | $0.00 | 4,471,805.0000 | 0 | 1.86% | 0.00% |
| Sept. 29, 2024 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 93749 | $0.00 | 4,390,283.0000 | 0 | 2.18% | 0.00% |
| June 28, 2024 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 88237 | $0.00 | 4,270,877.0000 | 0 | 2.11% | 0.00% |
| June 30, 2024 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 73529 | $0.00 | 4,344,406.0000 | 0 | 1.72% | 0.00% |
| March 28, 2024 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 64176 | $0.00 | 4,163,685.0000 | 0 | 1.57% | 0.00% |
| March 31, 2024 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 53571 | $0.00 | 4,217,256.0000 | 0 | 1.29% | 0.00% |
| Dec. 31, 2023 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 133929 | $0.00 | 4,152,045.0000 | 0 | 3.33% | 0.00% |
| Dec. 31, 2023 | BIOLARGO, INC. | $BLGO | Marshall Dennis E | Director | A | Option to Purchase Common Stock | 111607 | $0.00 | 4,108,116.0000 | 0 | 2.79% | 0.00% |