BIOLARGO, INC.

WESTMINSTER, CA · Clean tech · Public

Advanced water and wastewater treatment systems, PFAS removal technologies, and air quality control solutions using proprietary filtration and purification materials

Claim this profile

Follows are private to you and power your alerts

Updated Oct 23, 2026 · biolargo.com

Sector: Clean tech
Headquarters: WESTMINSTER, CA
Latest Form D: $815K, Jan 2024
Total capital: $7.3M

Federal grants: None on recordNo awards found in SBIR/STTR, NIH, NSF or DoD records.
Private capital raised: $7.2M; 22 Form D · last Jan 2024; 33 months since last filing
Federal contracts: $100K; 1 award · Environmental Prot; Rank in Clean tech#109 of 914
Granted patents: 0; 3 pending

Capital timeline

Latest events

Jan 2024Private capital raisedForm D · SEC · 22nd filing$815K
May 2022Private capital raisedForm D · SEC · 21st filing$726K
May 2019Private capital raisedForm D · SEC · 20th filing$200K
May 2019Federal contractEnvironmental Prot · Biolargo, Inc. SBIR Phase I$100K
Jan 2019Private capital raisedForm D · SEC · 19th filing$70K
Apr 2018Private capital raisedForm D · SEC · 18th filing$100K
Aug 2017Private capital raisedForm D · SEC · 17th filing$250K
Aug 2017Private capital raisedForm D · SEC · 16th filing$217K
Jan 2017Private capital raisedForm D · SEC · 15th filing$250K
Jan 2017Private capital raisedForm D · SEC · 14th filing$242K
Aug 2016Private capital raisedForm D · SEC · 13th filing$280K
Mar 2015Private capital raisedForm D · SEC · 12th filing$75K
Aug 2014Private capital raisedForm D · SEC · 11th filing$75K
Sep 2013Private capital raisedForm D · SEC · 10th filing$15K
Feb 2013Private capital raisedForm D · SEC · 9th filing$350K
Jul 2012Private capital raisedForm D · SEC · 8th filing$321K
Feb 2012Private capital raisedForm D · SEC · 7th filing$95K
Oct 2011Private capital raisedForm D · SEC · 6th filing$50K
Jan 2011Private capital raisedForm D · SEC · 5th filing$111K
Jan 2011Private capital raisedForm D · SEC · 4th filing$1.1M
Jan 2011Private capital raisedForm D · SEC · 3rd filing$439K
Jan 2011Private capital raisedForm D · SEC · 2nd filing$681K
Jan 2011Private capital raisedForm D · SEC · 1st filing$723K

Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.

Founders and team

From SEC Form D filings

Charles K. DarganExecutive OfficerNamed in SEC Form D filings
CHARLES K DARGAN, IIExecutive OfficerNamed in SEC Form D filings
Christina E. BrayDirectorNamed in SEC Form D filings
Dennis P CalvertExecutive Officer, DirectorNamed in SEC Form D filings
Dennis E. MarshallDirectorNamed in SEC Form D filings
Gary A. CoxDirectorNamed in SEC Form D filings

Show all 12 people

Jack B. StrommenDirectorNamed in SEC Form D filings
John S. RunyanDirectorNamed in SEC Form D filings
Joseph L. ProvenzanoExecutive Officer, DirectorNamed in SEC Form D filings
Kenneth R. CodeExecutive Officer, DirectorNamed in SEC Form D filings
Kent C. Roberts, IIDirectorNamed in SEC Form D filings
Linda E. ParkDirectorNamed in SEC Form D filings

What it has protected

USPTO · 0 granted of 3

Aug 31, 2023PendingImproved Apparatus And Method For Mediation Of Pfas Contamination In An EnvironmentUSPTOApplication 18015769
PendingEnhanced System, Structure And Method For Removal Of Pfas From Aqueous MaterialsUSPTOApplication PCTUS2025051909
PendingImproved Apparatus And Method For Mediation Of Pfas Contamination In An EnvironmentUSPTOApplication PCTUS2021050305

PURAFIDE, LLCSimilar federal contract value in Clean tech · $100K in contracts
ORPC Holdings, LLCSimilar federal contract value in Clean tech · $100K in contracts
ADVANCED & INNOVATIVE MULTIFUNCTIONAL MATERIALS LLCSimilar federal contract value in Clean tech · $100K in contracts
GelTech Solutions, Inc.Similar federal contract value in Clean tech · $99K in contracts
AIRLIFT ENVIRONMENTAL, LLCSimilar federal contract value in Clean tech · $99K in contracts
Viking Cold Solutions, Inc.Similar federal contract value in Clean tech · $92K in contracts

Regulatory activity · Clean tech

Sector-level, not company-level

09 Jul 2026Air Plan Approval; Michigan; Redesignation and Maintenance Plan for the Partial St. Clair 2010 1-Hour Sulfur Dioxide (SO2) NAAQS Nonattainment AreaEnvironmental Protection Agency
02 Jul 2026Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment AreaEnvironmental Protection Agency
02 Jul 2026Air Plan Approval; Oklahoma; Updates to the State Implementation Plan for New Source Review Permitting and General SIP ProvisionsEnvironmental Protection Agency
30 Jun 2026Epyrifenacil; Pesticide TolerancesEnvironmental Protection Agency
30 Jun 2026Fluoxapiprolin; Pesticide TolerancesEnvironmental Protection Agency
30 Jun 2026Chlormequat Chloride; Pesticide TolerancesEnvironmental Protection Agency

Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.

Sources

Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.

How to read this page

Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.

Data freshness

SEC Form D filings through Oct 23, 2026. SBIR and STTR awards through Oct 21, 2026.