BIOLARGO, INC. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 313,754 | $0.16 | $50,201 | 25,751,505 | Nov 14, 2025 |
| CALVERT DENNIS P | President | Award / Grant | 310,269 | $0.16 | $49,643 | 10,393,403 | Nov 14, 2025 |
| CALVERT DENNIS P | President | Award / Grant | 169,498 | $0.20 | $33,900 | 10,029,542 | Jul 14, 2025 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 181,253 | $0.20 | $36,251 | 25,131,495 | Jul 14, 2025 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 57,666 | $0.19 | $10,957 | 25,120,245 | Dec 31, 2024 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 72,621 | $0.17 | $12,346 | 25,062,579 | Dec 31, 2023 |
| CALVERT DENNIS P | President | Award / Grant | 50,557 | $0.17 | $8,595 | 9,860,044 | Dec 31, 2023 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 19,010 | $0.17 | $3,232 | 24,989,958 | Sep 30, 2023 |
| CALVERT DENNIS P | President | Award / Grant | 50,553 | $0.18 | $9,100 | 9,809,487 | Jul 24, 2023 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 68,541 | $0.18 | $12,337 | 24,970,948 | Jun 30, 2023 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 30,747 | $0.20 | $6,149 | 24,902,407 | Mar 31, 2023 |
| CALVERT DENNIS P | President | Award / Grant | 100,549 | $0.27 | $27,148 | 9,758,934 | Oct 3, 2022 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 167,781 | $0.27 | $45,301 | 24,871,660 | Oct 3, 2022 |
| CALVERT DENNIS P | President | Award / Grant | 156,111 | $0.18 | $28,100 | 9,658,385 | Jul 7, 2022 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 107,784 | $0.18 | $19,401 | 24,703,879 | Jun 30, 2022 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 15,000 | $0.21 | $3,150 | 24,596,095 | Dec 31, 2021 |
| CALVERT DENNIS P | President | Gift | 156,000 | — | — | 9,502,274 | Dec 30, 2021 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 61,842 | $0.19 | $11,750 | 24,581,095 | Oct 5, 2021 |
| STROMMEN JACK B. | — | C | 563,035 | $0.24 | $135,128 | 4,878,579 | Apr 20, 2021 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 75,606 | $0.23 | $17,389 | 24,519,253 | Apr 1, 2021 |
| CALVERT DENNIS P | President | Award / Grant | 61,758 | $0.23 | $14,204 | 9,658,274 | Apr 1, 2021 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 335,840 | $0.12 | $40,301 | 24,443,647 | Dec 31, 2020 |
| CALVERT DENNIS P | President | Award / Grant | 316,260 | $0.12 | $37,951 | 9,596,516 | Dec 31, 2020 |
| CALVERT DENNIS P | President | Award / Grant | 164,331 | $0.15 | $24,650 | 9,505,256 | Oct 6, 2020 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 185,339 | $0.15 | $27,801 | 24,107,807 | Sep 30, 2020 |
| CALVERT DENNIS P | President | Award / Grant | 164,331 | $0.15 | $24,650 | 9,505,256 | Sep 30, 2020 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 166,474 | $0.16 | $26,636 | 23,922,468 | Jun 30, 2020 |
| CALVERT DENNIS P | President | Award / Grant | 200,929 | $0.16 | $32,149 | 9,340,925 | Jun 30, 2020 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 366,993 | $0.17 | $62,389 | 23,755,994 | Mar 31, 2020 |
| CALVERT DENNIS P | President | Award / Grant | 281,762 | $0.17 | $47,900 | 9,139,996 | Mar 31, 2020 |
| CALVERT DENNIS P | President | Gift | 25,000 | — | — | 8,858,234 | Mar 9, 2020 |
| CALVERT DENNIS P | President | Gift | 225,000 | — | — | 8,883,234 | Dec 31, 2019 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 35,080 | $0.32 | $11,226 | 23,389,001 | Sep 30, 2019 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 235,656 | $0.23 | $54,201 | 23,353,921 | Jun 30, 2019 |
| CALVERT DENNIS P | President | Award / Grant | 230,219 | $0.23 | $52,950 | 9,108,234 | Jun 30, 2019 |
| PROVENZANO JOSEPH L | Secretary | Award / Grant | 500,000 | — | — | 1,770,743 | Jun 18, 2019 |
| CALVERT DENNIS P | President | Award / Grant | 268,434 | $0.16 | $42,949 | 8,878,015 | Apr 29, 2019 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 311,562 | $0.16 | $49,850 | 23,118,265 | Apr 29, 2019 |
| CALVERT DENNIS P | President | Award / Grant | 178,956 | $0.24 | $42,949 | 8,609,581 | Dec 31, 2018 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 202,845 | $0.24 | $48,683 | 22,806,703 | Dec 31, 2018 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 130,187 | $0.27 | $35,150 | 22,603,858 | Sep 30, 2018 |
| CALVERT DENNIS P | President | Award / Grant | 119,071 | $0.27 | $32,149 | 8,505,625 | Sep 30, 2018 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 90,553 | $0.43 | $38,938 | 22,473,671 | Jul 5, 2018 |
| CALVERT DENNIS P | President | Award / Grant | 86,397 | $0.43 | $37,151 | 8,386,554 | Jul 5, 2018 |
| STROMMEN JACK B. | — | C | 7,532 | $0.37 | $2,787 | 4,315,544 | Jun 29, 2018 |
| STROMMEN JACK B. | — | C | 2,201,714 | $0.30 | $660,514 | 4,308,012 | May 18, 2018 |
| STROMMEN JACK B. | — | C | 1,450,400 | $0.25 | $362,600 | 2,106,298 | May 2, 2018 |
| CALVERT DENNIS P | President | Award / Grant | 150,197 | $0.26 | $39,051 | 8,300,157 | Mar 31, 2018 |
| CODE KENNETH REAY | Chief Science Officer | Award / Grant | 172,833 | $0.26 | $44,937 | 22,383,118 | Mar 31, 2018 |
| STROMMEN JACK B. | — | Purchase | 110,636 | $0.27 | $29,872 | 655,898 | Mar 23, 2018 |