The SEC lists BIOLARGO, INC. under CIK 0000880242, in chemicals and allied products. It is grouped with Materials companies on this site. It filed a registration statement with the SEC on 9 April 2026 and has not yet priced an offering.
BLGO Form 4 activity by transaction type, last 90 days
Form 4 transaction type
Transactions
Shares
Total value
Grant or award
7
2,670,020
Bona-fide gift
2
4,000,000
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
BLGO insider transactions (Form 4)
37
36 Form 4 filings on record, the earliest from Oct 1, 2024, newest first. Filing history page 1 of 2.
Footnote F1 (shares): The shares acquired are subject to a Lock-Up Agreement dated as of the issuance date whereby shares are locked-up and restricted from sale until the Issuer reports gross revenue of at least $40 million on a consolidated basis for any reported period (e.g, quarter or annual), or… Full note on SEC EDGAR
Footnote F2 (price): Shares received from Issuer in exchange for a reduction in amounts owed by Issuer to Reporting Person for salary and unreimbursed business expenses (equal to the product of the number of shares acquired and the acquisition price per share).
Footnote F1 (shares): The shares issued are subject to a Lock-Up Agreement dated as of the issuance date whereby shares are locked-up and restricted from sale until the Issuer reports gross revenue of at least $40 million on a consolidated basis for any reported period (e.g, quarter or annual), or… Full note on SEC EDGAR
Footnote F2 (price): Shares received from Issuer in exchange for a reduction in amounts owed by Issuer to Reporting Person for salary and unreimbursed business expenses (equal to the product of the number of shares issued and the acquisition price per share).
Footnote F1 (price): This Option was granted to Reporting Person to replace an option to purchase 29,605 shares that had been issued to compensate Reporting Person for services to the Issuer and had expired unexercised due to a discrepancy between the original exercise price and Issuer's current… Full note on SEC EDGAR
Footnote F3 (price): This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was issued to Reporting Person as payment for $15,000 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (shares): The shares issued are subject to a Lock-Up Agreement dated as of the issuance date whereby shares are locked-up and restricted from sale until the Issuer reports gross revenue of at least $40 million on a consolidated basis for any reported period (e.g, quarter or annual), or… Full note on SEC EDGAR
Footnote F2 (price): Shares received from Issuer in exchange for a reduction in amounts owed by Issuer to Reporting Person for salary and unreimbursed business expenses (equal to the product of the number of shares and acquisition price per share).
Footnote F1 (shares): The shares issued are subject to a Lock-Up Agreement dated as of the issuance date whereby shares are locked-up and restricted from sale until the Issuer reports gross revenue of at least $40 million on a consolidated basis for any reported period (e.g, quarter or annual), or… Full note on SEC EDGAR
Footnote F2 (price): Shares received from Issuer in exchange for a reduction in amounts owed by Issuer to Reporting Person for salary and unreimbursed business expenses (equal to the product of the number of shares issued and the acquisition price per share).
Footnote F1 (price): This Option was issued to Reporting Person as payment for $15,000 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was granted to Reporting Person to replace an option to purchase 22,500 shares that had been issued to compensate Reporting Person for services to the Issuer and had expired unexercised due to a discrepancy between the original exercise price and Issuer's current… Full note on SEC EDGAR
Footnote F3 (price): This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was granted to Reporting Person to replace an option to purchase 10,000 shares that had been issued to compensate Reporting Person for services on the board of directors to the Issuer and had expired unexercised due to a discrepancy between the original exercise… Full note on SEC EDGAR
Footnote F1 (shares): The shares issued are subject to a Lock-Up Agreement dated as of the issuance date whereby shares are locked-up and restricted from sale until the Issuer reports gross revenue of at least $40 million on a consolidated basis for any reported period (e.g, quarter or annual), or… Full note on SEC EDGAR
Footnote F2 (price): Shares received from Issuer in exchange for a reduction in amounts owed by Issuer to Reporting Person for salary and unreimbursed business expenses (equal to the product of the number of shares and acquisition price per share).
Footnote F1 (price): This Option was issued to Reporting Person as payment for $15,000 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was granted to Reporting Person to replace an option to purchase 68,182 shares that had been issued to compensate Reporting Person for $22,500 in services to the Issuer and had expired unexercised due to a discrepancy between the original exercise price and Issuer's… Full note on SEC EDGAR
Footnote F3 (price): This Option was issued to Reporting Person as payment for $18,750 in fees due to Reporting Person by Issuer in exchange for services on its board of directors for the most recently completed quarterly period, pursuant to the Issuer's 2024 Equity Incentive Plan. The number of… Full note on SEC EDGAR
Footnote F1 (price): This Option was issued to the Reporting Person as compensation to serve as Issuer's Chief Financial Officer from February 1, 2026, through January 31, 2027.
Footnote F1 (shares): The shares issued are subject to a Lock-Up Agreement dated as of the issuance date whereby shares are locked-up and restricted from sale until the Issuer reports gross revenue of at least $40 million on a consolidated basis for any reported period (e.g, quarter or annual), or… Full note on SEC EDGAR
Footnote F2 (price): Shares received from Issuer in exchange for a reduction in amounts owed by Issuer to Reporting Person for salary and unreimbursed business expenses (equal to the product of the number of shares and acquisition price per share).
Footnote F1 (shares): The shares issued are subject to a Lock-Up Agreement dated as of the issuance date whereby shares are locked-up and restricted from sale until the Issuer reports gross revenue of at least $40 million on a consolidated basis for any reported period (e.g, quarter or annual), or… Full note on SEC EDGAR
Footnote F2 (price): Shares received from Issuer in exchange for a reduction in amounts owed by Issuer to Reporting Person for salary and unreimbursed business expenses (equal to the product of the number of shares issued and the acquisition price per share).
BIOLARGO, INC. (BLGO) had 6 insider filings in the last 90 days, with the most recent on 2026-10-02. The full record for BLGO runs to 36 Form 4 filings, the earliest from 2024-10-01. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying BLGO stock?
No insider purchases of BLGO were filed in the last 90 days.
How many insiders are selling BLGO stock?
No insider sales of BLGO were filed in the last 90 days.
Where can I see BLGO SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects BLGO Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
Dennis E. Marshall - Director
Jack B. Strommen - Director
Christina Elaine Bray - Director
Linda Park - Director
