BLGOBIOLARGO, INC.
- Market cap
- $23.43M
- as of 2026-10-23
- Latest close
- $0.07
- as of 2026-10-23
- Sector
- Basic Materials
- as of 2026-10-24
- Industry
- Specialty Chemicals
- as of 2026-10-24
Cluster
No cluster in the last 90 days under the default rule (14d · ≥2 insiders · all roles).
Form 4 historysince 2023-10-03
| Insider | Traded | Filed | Type | Shares | Price | Value | Owned after | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|
| Park Linda | Sep 30 | Oct 2 | A · derivative | 234,375 | $0.08 | $18,750 | 1,781,075 | No | Form 4 |
| Strommen Jack B. | Sep 30 | Oct 2 | A · derivative | 187,500 | $0.08 | $15,000 | 2,771,762 | No | Form 4 |
| Bray Christina Elaine | Sep 30 | Oct 2 | A · derivative | 234,375 | $0.08 | $18,750 | 1,781,075 | No | Form 4 |
| Marshall Dennis E | Sep 30 | Oct 2 | A · derivative | 281,248 | $0.08 | $22,500 | 6,056,317 | No | Form 4 |
| Marshall Dennis E | Sep 30 | Oct 2 | A · derivative | 234,375 | $0.08 | $18,750 | 6,290,692 | No | Form 4 |
| Calvert Dennis PPresident | Sep 30 | Oct 2 | A | 931,886 | $0.08 | $74,551 | 11,989,994 | No | Form 4 |
| Calvert Dennis PPresident | Sep 30 | Oct 2 | G | 2,000,000 | $0.00 | $0 | 13,989,994 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Sep 30 | Oct 2 | A | 566,261 | $0.08 | $45,301 | 26,974,580 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Sep 30 | Oct 2 | G | 2,000,000 | $0.00 | $0 | 24,974,580 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Jul 7 | Jul 7 | A | 532,567 | $0.11 | $58,582 | 26,408,319 | No | Form 4 |
| Calvert Dennis PPresident | Jul 1 | Jul 2 | A | 219,914 | $0.11 | $24,191 | 11,058,108 | No | Form 4 |
| Marshall Dennis E | Jun 30 | Jul 2 | A · derivative | 198,238 | $0.11 | $21,806 | 5,639,476 | No | Form 4 |
| Marshall Dennis E | Jun 30 | Jul 2 | A · derivative | 115,741 | $0.11 | $12,732 | 5,804,674 | No | Form 4 |
| Bray Christina Elaine | Jun 30 | Jul 2 | A · derivative | 165,198 | $0.11 | $18,172 | 1,546,700 | No | Form 4 |
| Park Linda | Jun 30 | Jul 2 | A · derivative | 165,198 | $0.11 | $18,172 | 1,546,700 | No | Form 4 |
| Strommen Jack B. | Jun 30 | Jul 2 | A · derivative | 132,159 | $0.11 | $14,537 | 2,584,262 | No | Form 4 |
| Calvert Dennis PPresident | Jun 30 | Jul 2 | A | 699,569 | $0.11 | $76,953 | 10,838,194 | No | Form 4 |
| Marshall Dennis E | Jun 22 | Jun 24 | A · derivative | 40,909 | $0.11 | $4,500 | 5,463,738 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Mar 31 | Apr 2 | A | 69,444 | $0.16 | $11,111 | 25,875,752 | No | Form 4 |
| Marshall Dennis E | Mar 31 | Apr 1 | A · derivative | 138,889 | $0.16 | $22,222 | 5,317,088 | No | Form 4 |
| Marshall Dennis E | Mar 31 | Apr 1 | A · derivative | 115,741 | $0.16 | $18,519 | 5,432,829 | No | Form 4 |
| Park Linda | Mar 31 | Apr 1 | A · derivative | 115,741 | $0.16 | $18,519 | 1,381,502 | No | Form 4 |
| Bray Christina Elaine | Mar 31 | Apr 1 | A · derivative | 115,741 | $0.16 | $18,519 | 1,381,502 | No | Form 4 |
| Strommen Jack B. | Mar 31 | Apr 1 | A · derivative | 92,593 | $0.16 | $14,815 | 2,452,103 | No | Form 4 |
| Dargan Charles KChief Financial Officer | Feb 1 | Feb 3 | A · derivative | 300,000 | $0.18 | $54,000 | 5,931,668 | No | Form 4 |
| Marshall Dennis E | Dec 31, 2025 | Jan 5 | A · derivative | 122,084 | $0.18 | $21,975 | 5,144,645 | No | Form 4 |
| Marshall Dennis E | Dec 31, 2025 | Jan 5 | A · derivative | 101,736 | $0.17 | $17,295 | 5,246,381 | No | Form 4 |
| Strommen Jack B. | Dec 31, 2025 | Jan 5 | A · derivative | 81,389 | $0.18 | $14,650 | 2,359,510 | No | Form 4 |
| Bray Christina Elaine | Dec 31, 2025 | Jan 5 | A · derivative | 101,736 | $0.18 | $18,312 | 1,265,761 | No | Form 4 |
| Park Linda | Dec 31, 2025 | Jan 5 | A · derivative | 101,736 | $0.18 | $18,312 | 1,265,761 | No | Form 4 |
| Calvert Dennis PPresident | Dec 31, 2025 | Jan 5 | A | 130,222 | $0.18 | $23,440 | 10,523,625 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Dec 31, 2025 | Jan 5 | A | 54,803 | $0.18 | $9,865 | 25,806,308 | No | Form 4 |
| Calvert Dennis PPresident | Nov 14, 2025 | Nov 17, 2025 | A | 310,269 | $0.16 | $49,643 | 10,393,403 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Nov 14, 2025 | Nov 17, 2025 | A | 313,754 | $0.16 | $50,201 | 25,751,505 | No | Form 4 |
| Marshall Dennis E | Sep 30, 2025 | Oct 2, 2025 | A · derivative | 132,351 | $0.17 | $22,500 | 4,957,267 | No | Form 4 |
| Marshall Dennis E | Sep 30, 2025 | Oct 2, 2025 | A · derivative | 110,294 | $0.17 | $18,750 | 5,067,561 | No | Form 4 |
| Bray Christina Elaine | Sep 30, 2025 | Oct 2, 2025 | A · derivative | 110,294 | $0.17 | $18,750 | 1,164,025 | No | Form 4 |
| Park Linda | Sep 30, 2025 | Oct 2, 2025 | A · derivative | 110,294 | $0.17 | $18,750 | 1,164,025 | No | Form 4 |
| Strommen Jack B. | Sep 30, 2025 | Oct 2, 2025 | A · derivative | 88,235 | $0.17 | $15,000 | 2,278,121 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Jul 14, 2025 | Jul 16, 2025 | A | 181,253 | $0.20 | $36,251 | 25,131,495 | No | Form 4 |
| Calvert Dennis PPresident | Jul 14, 2025 | Jul 16, 2025 | A | 169,498 | $0.20 | $33,900 | 10,029,542 | No | Form 4 |
| Marshall Dennis E | Jun 30, 2025 | Jul 2, 2025 | A · derivative | 19,000 | $0.20 | $3,800 | 4,717,566 | No | Form 4 |
| Marshall Dennis E | Jun 30, 2025 | Jul 2, 2025 | A · derivative | 112,501 | $0.20 | $22,500 | 4,765,781 | No | Form 4 |
| Marshall Dennis E | Jun 30, 2025 | Jul 2, 2025 | A · derivative | 93,750 | $0.20 | $18,750 | 4,859,531 | No | Form 4 |
| Bray Christina Elaine | Jun 30, 2025 | Jul 2, 2025 | A · derivative | 93,750 | $0.20 | $18,750 | 1,053,731 | No | Form 4 |
| Strommen Jack B. | Jun 30, 2025 | Jul 2, 2025 | A · derivative | 75,000 | $0.20 | $15,000 | 2,189,886 | No | Form 4 |
| Park Linda | Jun 30, 2025 | Jul 2, 2025 | A · derivative | 93,750 | $0.20 | $18,750 | 1,053,731 | No | Form 4 |
| Park Linda | Dec 31, 2024 | Jan 3, 2025 | A · derivative | 98,684 | $0.19 | $18,750 | 893,017 | No | Form 4 |
| Bray Christina Elaine | Dec 31, 2024 | Jan 3, 2025 | A · derivative | 98,684 | $0.19 | $18,750 | 893,017 | No | Form 4 |
| Marshall Dennis E | Dec 31, 2024 | Jan 3, 2025 | A · derivative | 98,684 | $0.19 | $18,750 | 4,624,625 | No | Form 4 |
| Strommen Jack B. | Dec 31, 2024 | Jan 3, 2025 | A · derivative | 78,947 | $0.19 | $15,000 | 2,061,395 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Dec 31, 2024 | Jan 3, 2025 | A | 57,666 | $0.19 | $10,957 | 25,120,245 | No | Form 4 |
| Marshall Dennis E | Dec 26, 2024 | Dec 30, 2024 | A · derivative | 118,422 | $0.19 | $22,500 | 4,525,941 | No | Form 4 |
| Bray Christina Elaine | Sep 30, 2024 | Oct 2, 2024 | A · derivative | 81,522 | $0.23 | $18,750 | 794,333 | No | Form 4 |
| Park Linda | Sep 30, 2024 | Oct 2, 2024 | A · derivative | 81,522 | $0.23 | $18,750 | 794,333 | No | Form 4 |
| Strommen Jack B. | Sep 30, 2024 | Oct 2, 2024 | A · derivative | 65,217 | $0.23 | $15,000 | 1,982,368 | No | Form 4 |
| Marshall Dennis E | Sep 30, 2024 | Oct 1, 2024 | A · derivative | 81,522 | $0.23 | $18,750 | 4,471,805 | No | Form 4 |
| Marshall Dennis E | Sep 29, 2024 | Oct 1, 2024 | A · derivative | 93,749 | $0.24 | $22,500 | 4,390,283 | No | Form 4 |
| Dargan Charles KChief Financial Officer | Aug 13, 2024 | Aug 15, 2024 | A · derivative | 300,000 | $0.24 | $72,000 | 4,625,786 | No | Form 4 |
| Marshall Dennis E | Jun 30, 2024 | Jul 1, 2024 | A · derivative | 73,529 | $0.26 | $19,118 | 4,344,406 | No | Form 4 |
| Park Linda | Jun 30, 2024 | Jul 1, 2024 | A · derivative | 73,529 | $0.26 | $19,118 | 712,811 | No | Form 4 |
| Bray Christina Elaine | Jun 30, 2024 | Jul 1, 2024 | A · derivative | 73,529 | $0.26 | $19,118 | 712,811 | No | Form 4 |
| Strommen Jack B. | Jun 30, 2024 | Jul 1, 2024 | A · derivative | 58,824 | $0.26 | $15,294 | 1,917,151 | No | Form 4 |
| Marshall Dennis E | Jun 28, 2024 | Jul 1, 2024 | A · derivative | 88,237 | $0.26 | $22,942 | 4,270,877 | No | Form 4 |
| Dargan Charles KChief Financial Officer | Jun 23, 2024 | Jun 25, 2024 | A · derivative | 700,000 | $0.27 | $189,000 | 4,325,786 | No | Form 4 |
| Marshall Dennis E | Mar 31, 2024 | Apr 2, 2024 | A · derivative | 53,571 | $0.35 | $18,750 | 4,217,256 | No | Form 4 |
| Bray Christina Elaine | Mar 31, 2024 | Apr 2, 2024 | A · derivative | 53,571 | $0.35 | $18,750 | 639,282 | No | Form 4 |
| Park Linda | Mar 31, 2024 | Apr 2, 2024 | A · derivative | 53,571 | $0.35 | $18,750 | 639,282 | No | Form 4 |
| Strommen Jack B. | Mar 31, 2024 | Apr 2, 2024 | A · derivative | 42,857 | $0.35 | $15,000 | 1,858,327 | No | Form 4 |
| Marshall Dennis E | Mar 28, 2024 | Apr 2, 2024 | A · derivative | 64,176 | $0.35 | $22,462 | 4,163,685 | No | Form 4 |
| Marshall Dennis E | Dec 31, 2023 | Jan 3, 2024 | A · derivative | 111,607 | $0.17 | $18,973 | 4,108,116 | No | Form 4 |
| Marshall Dennis E | Dec 31, 2023 | Jan 3, 2024 | A · derivative | 133,929 | $0.17 | $22,768 | 4,152,045 | No | Form 4 |
| Bray Christina Elaine | Dec 31, 2023 | Jan 3, 2024 | A · derivative | 111,607 | $0.17 | $18,973 | 585,711 | No | Form 4 |
| Park Linda | Dec 31, 2023 | Jan 3, 2024 | A · derivative | 111,607 | $0.17 | $18,973 | 585,711 | No | Form 4 |
| Calvert Dennis PPresident | Dec 31, 2023 | Jan 3, 2024 | A | 50,557 | $0.17 | $8,595 | 9,860,044 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Dec 31, 2023 | Jan 3, 2024 | A | 72,621 | $0.17 | $12,346 | 25,062,579 | No | Form 4 |
| Marshall Dennis E | Sep 30, 2023 | Oct 3, 2023 | A · derivative | 113,156 | $0.17 | $19,237 | 3,996,509 | No | Form 4 |
| Park Linda | Sep 30, 2023 | Oct 3, 2023 | A · derivative | 113,156 | $0.17 | $19,237 | 474,104 | No | Form 4 |
| Bray Christina Elaine | Sep 30, 2023 | Oct 3, 2023 | A · derivative | 113,156 | $0.17 | $19,237 | 474,104 | No | Form 4 |
| Strommen Jack B. | Sep 30, 2023 | Oct 3, 2023 | A · derivative | 90,525 | $0.17 | $15,389 | 1,726,184 | No | Form 4 |
| Code Kenneth ReayChief Science Officer | Sep 30, 2023 | Oct 3, 2023 | A | 19,010 | $0.17 | $3,232 | 24,989,958 | No | Form 4 |