Company · CIK 880242

# BIOLARGO, INC.

| CIK | [880242](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000880242) (SEC EDGAR) |
| --- | --- |
| Industry (SIC) | 2800 — Chemicals & Allied Products |
| Incorporated in | DE |
| Business address | CA |
| Listed | BLGO (OTC) |
| First annual or quarterly report | 2008-04-15 |

## Offerings

 11 registrations

| Registration | Label and status | First filed | Last event | Filings |
| --- | --- | --- | --- | --- |
| 333-294947 | Registered company Final prospectus | 2026-04-09 | 2026-04-17 | 3 |
| 333-294948 | Registered company Final prospectus | 2026-04-09 | 2026-04-17 | 3 |
| 333-278669 | Registered company Final prospectus | 2024-04-12 | 2025-06-11 | 5 |
| 333-268973 | Registered company Final prospectus | 2022-12-23 | 2025-04-25 | 10 |
| 333-233534 | Registered company Final prospectus | 2019-08-29 | 2024-04-25 | 14 |
| 333-271465 | Registered company Withdrawn | 2023-04-27 | 2024-04-05 | 2 |
| 333-215730 | Registered company Final prospectus | 2017-01-25 | 2022-04-22 | 18 |
| 333-237651 | Registered company Final prospectus | 2020-04-10 | 2022-04-22 | 7 |
| 333-222572 | Registered company Final prospectus | 2018-01-17 | 2021-04-12 | 13 |
| 333-220482 | Registered company Final prospectus | 2017-09-15 | 2019-10-02 | 7 |
| 333-228213 | Registered company Dormant | 2018-11-06 | 2019-01-28 | 2 |

## Filings

 84

| Filed | Filing | Registration | Accession |
| --- | --- | --- | --- |
| 2026-04-17 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774926012700/0001437749-26-012700-index.htm) Final prospectus | 333-294948 | 0001437749-26-012700 |
| 2026-04-17 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774926012699/0001437749-26-012699-index.htm) Final prospectus | 333-294947 | 0001437749-26-012699 |
| 2026-04-15 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999526001205/9999999995-26-001205-index.htm) Declared effective | 333-294948 | 9999999995-26-001205 |
| 2026-04-15 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999526001204/9999999995-26-001204-index.htm) Declared effective | 333-294947 | 9999999995-26-001204 |
| 2026-04-09 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774926011880/0001437749-26-011880-index.htm) Registration filed | 333-294948 | 0001437749-26-011880 |
| 2026-04-09 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774926011875/0001437749-26-011875-index.htm) Registration filed | 333-294947 | 0001437749-26-011875 |
| 2025-06-11 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774925020012/0001437749-25-020012-index.htm) Final prospectus | 333-278669 | 0001437749-25-020012 |
| 2025-06-09 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999525001867/9999999995-25-001867-index.htm) Declared effective | 333-278669 | 9999999995-25-001867 |
| 2025-04-25 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774925013152/0001437749-25-013152-index.htm) Final prospectus | 333-268973 | 0001437749-25-013152 |
| 2025-04-24 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999525001220/9999999995-25-001220-index.htm) Declared effective | 333-268973 | 9999999995-25-001220 |
| 2024-04-25 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774924013164/0001437749-24-013164-index.htm) Final prospectus | 333-233534 | 0001437749-24-013164 |
| 2024-04-25 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774924013163/0001437749-24-013163-index.htm) Final prospectus | 333-268973 | 0001437749-24-013163 |
| 2024-04-25 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774924013162/0001437749-24-013162-index.htm) Final prospectus | 333-278669 | 0001437749-24-013162 |
| 2024-04-23 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999524001088/9999999995-24-001088-index.htm) Declared effective | 333-278669 | 9999999995-24-001088 |
| 2024-04-23 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999524001074/9999999995-24-001074-index.htm) Declared effective | 333-268973 | 9999999995-24-001074 |
| 2024-04-23 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999524001072/9999999995-24-001072-index.htm) Declared effective | 333-233534 | 9999999995-24-001072 |
| 2024-04-12 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774924011927/0001437749-24-011927-index.htm) Registration filed | 333-278669 | 0001437749-24-011927 |
| 2024-04-05 | [RW](https://www.sec.gov/Archives/edgar/data/880242/000143774924011141/0001437749-24-011141-index.htm) Withdrawn | 333-271465 | 0001437749-24-011141 |
| 2023-05-23 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774923015607/0001437749-23-015607-index.htm) Final prospectus | 333-233534 | 0001437749-23-015607 |
| 2023-05-10 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999523001357/9999999995-23-001357-index.htm) Declared effective | 333-233534 | 9999999995-23-001357 |
| 2023-04-27 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774923011209/0001437749-23-011209-index.htm) Registration filed | 333-271465 | 0001437749-23-011209 |
| 2023-04-24 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774923010910/0001437749-23-010910-index.htm) Final prospectus | 333-268973 | 0001437749-23-010910 |
| 2023-04-19 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999523000978/9999999995-23-000978-index.htm) Declared effective | 333-268973 | 9999999995-23-000978 |
| 2023-01-26 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774923001854/0001437749-23-001854-index.htm) Final prospectus | 333-268973 | 0001437749-23-001854 |
| 2023-01-19 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999523000138/9999999995-23-000138-index.htm) Declared effective | 333-268973 | 9999999995-23-000138 |
| 2023-01-11 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774923000860/0001437749-23-000860-index.htm) Amendment | 333-268973 | 0001437749-23-000860 |
| 2022-12-23 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774922029630/0001437749-22-029630-index.htm) Registration filed | 333-268973 | 0001437749-22-029630 |
| 2022-04-22 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774922009507/0001437749-22-009507-index.htm) Final prospectus | 333-233534 | 0001437749-22-009507 |
| 2022-04-22 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774922009506/0001437749-22-009506-index.htm) Final prospectus | 333-237651 | 0001437749-22-009506 |
| 2022-04-22 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774922009505/0001437749-22-009505-index.htm) Final prospectus | 333-215730 | 0001437749-22-009505 |
| 2022-04-19 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999522001014/9999999995-22-001014-index.htm) Declared effective | 333-237651 | 9999999995-22-001014 |
| 2022-04-19 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999522001012/9999999995-22-001012-index.htm) Declared effective | 333-233534 | 9999999995-22-001012 |
| 2022-04-19 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999522001011/9999999995-22-001011-index.htm) Declared effective | 333-215730 | 9999999995-22-001011 |
| 2021-04-13 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774921008754/0001437749-21-008754-index.htm) Final prospectus | 333-237651 | 0001437749-21-008754 |
| 2021-04-12 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774921008741/0001437749-21-008741-index.htm) Final prospectus | 333-215730 | 0001437749-21-008741 |
| 2021-04-12 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774921008740/0001437749-21-008740-index.htm) Final prospectus | 333-233534 | 0001437749-21-008740 |
| 2021-04-12 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774921008739/0001437749-21-008739-index.htm) Final prospectus | 333-222572 | 0001437749-21-008739 |
| 2021-04-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999521001348/9999999995-21-001348-index.htm) Declared effective | 333-237651 | 9999999995-21-001348 |
| 2021-04-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999521001345/9999999995-21-001345-index.htm) Declared effective | 333-233534 | 9999999995-21-001345 |
| 2021-04-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999521001340/9999999995-21-001340-index.htm) Declared effective | 333-222572 | 9999999995-21-001340 |
| 2021-04-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999521001338/9999999995-21-001338-index.htm) Declared effective | 333-215730 | 9999999995-21-001338 |
| 2020-04-30 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774920009010/0001437749-20-009010-index.htm) Final prospectus | 333-222572 | 0001437749-20-009010 |
| 2020-04-30 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774920009009/0001437749-20-009009-index.htm) Final prospectus | 333-215730 | 0001437749-20-009009 |
| 2020-04-30 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774920008994/0001437749-20-008994-index.htm) Final prospectus | 333-233534 | 0001437749-20-008994 |
| 2020-04-28 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999520000895/9999999995-20-000895-index.htm) Declared effective | 333-233534 | 9999999995-20-000895 |
| 2020-04-28 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999520000891/9999999995-20-000891-index.htm) Declared effective | 333-222572 | 9999999995-20-000891 |
| 2020-04-28 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999520000889/9999999995-20-000889-index.htm) Declared effective | 333-215730 | 9999999995-20-000889 |
| 2020-04-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999520000812/9999999995-20-000812-index.htm) Declared effective | 333-237651 | 9999999995-20-000812 |
| 2020-04-21 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774920008126/0001437749-20-008126-index.htm) Final prospectus | 333-237651 | 0001437749-20-008126 |
| 2020-04-10 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774920007511/0001437749-20-007511-index.htm) Registration filed | 333-237651 | 0001437749-20-007511 |
| 2019-10-02 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774919019399/0001437749-19-019399-index.htm) Final prospectus | 333-220482 | 0001437749-19-019399 |
| 2019-09-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999519002203/9999999995-19-002203-index.htm) Declared effective | 333-220482 | 9999999995-19-002203 |
| 2019-09-20 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999519002141/9999999995-19-002141-index.htm) Declared effective | 333-233534 | 9999999995-19-002141 |
| 2019-09-20 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774919018822/0001437749-19-018822-index.htm) Final prospectus | 333-233534 | 0001437749-19-018822 |
| 2019-09-17 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774919018540/0001437749-19-018540-index.htm) Amendment | 333-233534 | 0001437749-19-018540 |
| 2019-09-13 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774919018339/0001437749-19-018339-index.htm) Final prospectus | 333-215730 | 0001437749-19-018339 |
| 2019-09-11 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999519002058/9999999995-19-002058-index.htm) Declared effective | 333-215730 | 9999999995-19-002058 |
| 2019-08-29 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774919017652/0001437749-19-017652-index.htm) Registration filed | 333-233534 | 0001437749-19-017652 |
| 2019-05-23 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774919010763/0001437749-19-010763-index.htm) Final prospectus | 333-222572 | 0001437749-19-010763 |
| 2019-05-20 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999519001151/9999999995-19-001151-index.htm) Declared effective | 333-222572 | 9999999995-19-001151 |
| 2019-01-28 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774919001440/0001437749-19-001440-index.htm) Amendment | 333-228213 | 0001437749-19-001440 |
| 2018-11-06 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774918019698/0001437749-18-019698-index.htm) Registration filed | 333-228213 | 0001437749-18-019698 |
| 2018-09-10 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774918016823/0001437749-18-016823-index.htm) Final prospectus | 333-215730 | 0001437749-18-016823 |
| 2018-09-10 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774918016819/0001437749-18-016819-index.htm) Final prospectus | 333-222572 | 0001437749-18-016819 |
| 2018-09-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999518002286/9999999995-18-002286-index.htm) Declared effective | 333-222572 | 9999999995-18-002286 |
| 2018-09-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999518002284/9999999995-18-002284-index.htm) Declared effective | 333-215730 | 9999999995-18-002284 |
| 2018-08-28 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774918016218/0001437749-18-016218-index.htm) Final prospectus | 333-220482 | 0001437749-18-016218 |
| 2018-06-29 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999518001665/9999999995-18-001665-index.htm) Declared effective | 333-220482 | 9999999995-18-001665 |
| 2018-02-09 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774918002147/0001437749-18-002147-index.htm) Final prospectus | 333-222572 | 0001437749-18-002147 |
| 2018-02-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999518000377/9999999995-18-000377-index.htm) Declared effective | 333-222572 | 9999999995-18-000377 |
| 2018-02-08 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774918002055/0001437749-18-002055-index.htm) Amendment | 333-222572 | 0001437749-18-002055 |
| 2018-02-07 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774918001916/0001437749-18-001916-index.htm) Amendment | 333-222572 | 0001437749-18-001916 |
| 2018-01-17 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774918000693/0001437749-18-000693-index.htm) Registration filed | 333-222572 | 0001437749-18-000693 |
| 2017-09-22 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999517002443/9999999995-17-002443-index.htm) Declared effective | 333-220482 | 9999999995-17-002443 |
| 2017-09-22 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774917016260/0001437749-17-016260-index.htm) Final prospectus | 333-220482 | 0001437749-17-016260 |
| 2017-09-15 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774917015985/0001437749-17-015985-index.htm) Registration filed | 333-220482 | 0001437749-17-015985 |
| 2017-06-15 | [EFFECT](https://www.sec.gov/Archives/edgar/data/880242/999999999517001538/9999999995-17-001538-index.htm) Declared effective | 333-215730 | 9999999995-17-001538 |
| 2017-06-15 | [424B4](https://www.sec.gov/Archives/edgar/data/880242/000143774917011341/0001437749-17-011341-index.htm) Final prospectus | 333-215730 | 0001437749-17-011341 |
| 2017-06-09 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774917011081/0001437749-17-011081-index.htm) Amendment | 333-215730 | 0001437749-17-011081 |
| 2017-06-05 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774917010648/0001437749-17-010648-index.htm) Amendment | 333-215730 | 0001437749-17-010648 |
| 2017-05-23 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774917009928/0001437749-17-009928-index.htm) Amendment | 333-215730 | 0001437749-17-009928 |
| 2017-05-01 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774917007648/0001437749-17-007648-index.htm) Amendment | 333-215730 | 0001437749-17-007648 |
| 2017-03-30 | [S-1/A](https://www.sec.gov/Archives/edgar/data/880242/000143774917005640/0001437749-17-005640-index.htm) Amendment | 333-215730 | 0001437749-17-005640 |
| 2017-01-25 | [S-1](https://www.sec.gov/Archives/edgar/data/880242/000143774917001105/0001437749-17-001105-index.htm) Registration filed | 333-215730 | 0001437749-17-001105 |

[All filings of this company](https://equitycapital.markets/filings?cik=880242) · [CSV](https://equitycapital.markets/filings.csv?cik=880242)

---
Source page: https://equitycapital.markets/company/880242 · Data: U.S. SEC EDGAR · CC BY 4.0