How many insider trades does FilingIQ track for BLGO?

FilingIQ tracks 90 Form 4 insider transactions for BLGO (BIOLARGO, INC.), covering filings from Jan 2, 2015 onwards. 4 of those are dated within the last 90 days.

Are BLGO insiders net buyers or net sellers?

Across the full Form 4 history for BLGO, 2 transactions (2%) were open-market purchases and 0 (0%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.

Where does BLGO insider data come from?

Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ normalises insider identity across reporting variations and scores discretionary open-market purchases and sales on its multi-factor composite model.

What sector is BLGO in?

BIOLARGO, INC. (BLGO) is classified in the Basic Materials sector, specifically Chemicals, with a current market capitalisation of $53.45M.

BLGO insider trading

OTC Markets OTCQX Basic Materials

BIOLARGO, INC.: insider trade history from SEC Form 4 filings.

Total Form 4 trades

Last 90 days

Buys / sells

2% / 0%

Market cap

$53.45M

About BIOLARGO, INC.

BioLargo, Inc. invents, develops, and commercializes various platform technologies. The company's technologies solve challenging environmental problems comprising per - and polyfluoroalkyl substances (PFAS) water contamination, advanced water and wastewater treatment, industrial odor and volatile organic compounds control, air quality control, infection control, and myriad environmental remediation. It provides full-service environmental engineering services. BioLargo, Inc. is based in Westminster, California.

Company website: www.biolargo.com

BLGO insider activity at a glance

FilingIQ tracks 90 insider transactions for BLGO in filings since Jan 2, 2015. The most recent transaction is dated Sep 30, 2026.

Across the full history, 2 open-market purchases and 0 open-market sales were filed under transaction codes P and S respectively. Compensatory share awards (code A) and option exercises (code M) are tracked separately and not counted here.

The average FilingIQ composite score on BLGO insider trades is 46.5/100, produced by FilingIQ's multi-factor Form 4 model. Model framework documented at methodology.

View live BLGO trades on FilingIQ Raw filings on SEC EDGAR

Latest BLGO Form 4 filings

CODE KENNETH REAY Chief Science Officer

AG Oct 2, 2026

CALVERT DENNIS P President

Bray Christina Elaine

A Oct 2, 2026

Park Linda

A Oct 2, 2026

CODE KENNETH REAY Chief Science Officer

A Jul 7, 2026

CALVERT DENNIS P President

Most recent disclosures. Sign up to filter by score, transaction code, or insider role.

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Frequently asked

How many insider trades does FilingIQ track for BLGO?: FilingIQ tracks 90 Form 4 insider transactions for BLGO (BIOLARGO, INC.), covering filings from Jan 2, 2015 onwards. 4 of those are dated within the last 90 days.
Are BLGO insiders net buyers or net sellers?: Across the full Form 4 history for BLGO, 2 transactions (2%) were open-market purchases and 0 (0%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.
Where does BLGO insider data come from?: Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ normalises insider identity across reporting variations and scores discretionary open-market purchases and sales on its multi-factor composite model.
What sector is BLGO in?: BIOLARGO, INC. (BLGO) is classified in the Basic Materials sector, specifically Chemicals, with a current market capitalisation of $53.45M.

Methodology & sources

Every BLGO insider transaction shown on FilingIQ is parsed directly from a public SEC Form 4 XML filing. Insider identity is normalised across reporting variants (CIK changes, name spellings, related-party indirect holdings). The FilingIQ composite score is documented in full on the team page and algo disclosure. Not investment advice; see disclaimer.