What is BioLargo, Inc. (BLGO) stock price today?

BioLargo, Inc. (BLGO) is currently trading at $0.10, down 1.42% today.

What is BLGO P/E ratio?

BioLargo, Inc.'s P/E ratio is -2.57. This is below the market average, suggesting the stock may be undervalued relative to earnings.

What is BLGO return on equity (ROE)?

BioLargo, Inc.'s return on equity (ROE) is -244.01%, indicating how efficiently the company generates profit from shareholders' equity. This is below the typical market average of 12-15%.

What is BioLargo, Inc.'s market cap?

BioLargo, Inc. has a market capitalization of $33.37M.

OTC · Chemicals

BioLargo, Inc. (BLGO) Stock

$0.10 -1.42% OTC: BLGO Basic Materials

BioLargo, Inc. pioneers the invention, development, and commercialization of sophisticated platform technologies.

Valuation

Metric	Value
Price	$0.10
Market Cap	$33.37M
P/E Ratio	-2.57
P/B Ratio	18.56
P/S Ratio	5.95
EPS (TTM)	$-0.04
52-Week High	$0.23
52-Week Low	$0.10
Dividend Yield	0.00%

Financials & Margins

Metric	Value
ROE	-244.01%
ROA	-150.73%
ROCE	-445.44%
Gross Margin	42.35%
Operating Margin	-288.42%
Net Margin	-230.08%
Debt/Equity	3.17
Current Ratio	1.10

Annual Financials (USD)

Metric	2021	2022	2023	2024	2025
Revenue	$3.0M	$6.0M	$12.0M	$18.0M	$8.0M
Operating Profit	$-6.0M	$-5.0M	$-4.0M	$-4.0M	$-15.0M
Net Profit	$-7.0M	$-4.0M	$-4.0M	$-2.0M	$-12.0M
EPS	$-0.03	$-0.02	$-0.01	$-0.01	$-0.04
Op Margin	-252.1%	-87.0%	-34.2%	-24.4%	-191.1%

Balance Sheet (USD)

Metric	2021	2022	2023	2024	2025
Total Assets	$3.0M	$5.0M	$8.0M	$11.0M	$8.0M
Total Liabilities	$2.0M	$3.0M	$4.0M	$4.0M	$7.0M
Cash	$1.0M	$2.0M	$4.0M	$4.0M	$4.0M
Borrowings	$1.0M	$1.0M	$2.0M	$3.0M	$4.0M

Latest News

BioLargo's Lake Stockholm AEC Installation passes six months of PFAS remediation Topping Two Million Gallons ACCESS Newswire · Aug 3, 2026 BioLargo Joins New Jersey Institute of Technology-Led PFAS Consortium; President Tonya Chandler Appointed to Board of Directors ACCESS Newswire · Jul 30, 2026 BioLargo Equipment Solutions & Technologies' "PFAS Lady" to Teach PFAS 101 at 41st Annual Tri-State Seminar ACCESS Newswire · Jul 29, 2026 BioLargo PFAS Treatment Technology Featured in The Disruptive Quarterly ACCESS Newswire · Jul 27, 2026 BioLargo Relaunching CupriDyne(R)-Based Consumer Products - Back by Popular Demand and Generated More than $125 Million in Pet-Care Sales ACCESS Newswire · Jul 13, 2026

Cash Flow (USD)

Metric	2021	2022	2023	2024	2025
Operating Cash Flow	$-4.0M	$-3.0M	$-2.0M	$-3.0M	$-8.0M
Investing Cash Flow	$0	$-1.0M	$-1.0M	$-3.0M	$0
Financing Cash Flow	$4.0M	$4.0M	$5.0M	$1.0M	$0
Net Cash Flow	$0	$1.0M	$2.0M	$0	$0
Free Cash Flow	$-4.0M	$-3.0M	$-3.0M	$-4.0M	$-8.0M

Valuation & Return Ratios

Metric	Value
PEG Ratio	0.02
EV / EBITDA	-2.20
FCF Yield	-28.35%
Quick Ratio	1.04
Interest Coverage	-23.62
Return 1Y	-38.82%
Return 3Y	-42.22%
Return 5Y	-50.48%

Peer Comparison

Ticker	Price	Change	P/E	Market Cap	Div Yield
BNETBion Environmental Technologies, Inc.	$0.18	+0.00%	0.01	$10.33M	0.00%
BTQNFBQE Water Inc.	$48.09	+0.00%	17.24	$62.55M	0.00%
ECCIEcoloclean Industries, Inc.	$0.00	—	0.00	$517	0.00%
ECEZEcosciences, Inc.	$0.00	—	0.00	$2.51M	0.00%
LIQTLiqTech International, Inc.	$0.42	+3.02%	-0.52	$13.92M	0.00%

About BioLargo, Inc.

BioLargo, Inc. pioneers the invention, development, and commercialization of sophisticated platform technologies. The company is dedicated to tackling critical environmental challenges, such as per- and polyfluoroalkyl substances (PFAS) contamination, advanced water and wastewater purification, managing industrial odors and volatile organic compounds (VOCs), enhancing air quality, and controlling infections. Backed by numerous issued patents, BioLargo maintains a robust product pipeline and extends its expertise through comprehensive environmental engineering services. Among its notable innovations are the Advanced Oxidation system, a water treatment solution generating potent oxidative and energetic iodine species; the Aqueous Electrostatic Concentrator, specifically designed for eliminating PFAS from water; CupriDyne Clean industrial products, which effectively neutralize stubborn odors and VOCs across various industrial settings; and specialized advanced wound care products. Established in 1991, BioLargo, Inc. is headquartered in Westminster, California.

BioLargo, Inc. is headquartered in US.

BioLargo, Inc. (BLGO) stock trades at $0.10 with a market capitalization of $33.37M. The stock is valued at a price-to-earnings (P/E) ratio of -2.57, price-to-book of 18.56, price-to-sales of 5.95. Over the past 52 weeks the stock has ranged between $0.10 and $0.23, and currently trades 56.5% below its 52-week high.

On profitability, BioLargo, Inc. generates a return on equity (ROE) of -244.01%, return on capital employed of -445.44%, an operating margin of -288.42%, a net profit margin of -230.08%.

Official website: www.biolargo.com

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