BioLargo (BLGO) Stock Price, News & Analysis

Company Overview

BioLargo, Inc. is a diversified environmental technologies company headquartered in Irvine, California, with roots tracing back to the late 1990s. Since its inception, the company has focused on developing scalable solutions for complex environmental challenges, including water treatment, odor control, and industrial wastewater remediation. BioLargo leverages proprietary chemistries and engineering expertise to offer targeted products and services that address pressing public health and environmental needs.

Central to BioLargo’s offerings is its Advanced Oxidation Technology (AOT), a patented electrochemical process designed to destroy contaminants in water and wastewater with minimal energy requirements. Complementing AOT is the CupriDyne Clean™ line of disinfectants and odor eliminators, which harness the antimicrobial properties of stabilized iodine for use in healthcare, food processing, and municipal applications. In addition, BioLargo’s Odor-No-More® solutions are deployed across agricultural and waste management facilities to provide continuous odor control without harsh chemicals.

BioLargo serves a broad range of end markets, including municipal water authorities, industrial processors, oil and gas operators, and agricultural enterprises in North America, Europe and parts of Asia. The company maintains strategic partnerships with engineering firms, research institutions, and government agencies to validate and pilot its technologies. Through demonstration projects and licensing agreements, BioLargo is working to establish a global footprint for its core platforms.

Under the leadership of founder and CEO Dennis P. Calvert, who holds more than 30 patents in environmental chemistry and engineering, BioLargo has built a robust intellectual property portfolio of over 100 issued patents and pending applications. Supporting this effort is a management team with deep experience in manufacturing scale-up and regulatory compliance. As it continues to expand manufacturing capabilities and pursue new market partnerships, BioLargo remains focused on advancing sustainable, cost-effective solutions for environmental remediation and public health protection.

Key Stats

• Today's Range: $0.19 to $0.20
• 50-Day Range: $0.20 to $0.25
• 52-Week Range: $0.16 to $0.32
• Volume: 74,691 shs
• Average Volume: 297,557 shs
• Market Capitalization: $59.72 million
• P/E Ratio: N/A
• Dividend Yield: N/A
• Price Target: N/A
• Consensus Rating: N/A

BioLargo Stock Analysis - MarketRank™

BioLargo scored higher than 20% of companies evaluated by MarketBeat, and ranked 94th out of 100 stocks in the construction sector. Scores are calculated by averaging available category scores, with extra weight given to analysis and valuation.

Analyst's Opinion

• Score: N/A
• Analyst Rating: N/A

Consensus Rating

There is not enough analysis data for BioLargo.

Earnings and Valuation

• Score: 0.0 / 5
• Proj. Earnings Growth: N/A

Price to Earnings Ratio vs. the Market

The P/E ratio of BioLargo is -19.51, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings.

Price to Earnings Ratio vs. Sector

The P/E ratio of BioLargo is -19.51, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings.

Price to Book Value per Share Ratio

BioLargo has a P/B Ratio of 19.51. P/B Ratios above 3 indicate that a company could be overvalued with respect to its assets and liabilities.

Short Interest

• Score: 3.0 / 5
• Short Interest Level: Healthy

Percentage of Shares Shorted

0.04% of the float of BioLargo has been sold short.

Short Interest Ratio / Days to Cover

BioLargo has a short interest ratio ("days to cover") of 0.1, which is generally considered an acceptable ratio of short interest to trading volume.

Change versus previous month

Short interest in BioLargo has recently increased by 5.43%, indicating that investor sentiment is decreasing significantly.

Dividend

• Score: 0.0 / 5
• Dividend Strength: N/A

Dividend Yield

BioLargo does not currently pay a dividend.

Dividend Growth

BioLargo does not have a long track record of dividend growth.

Sustainability and ESG

• Score: N/A
• Environmental Score: N/A

Percentage of Shares Shorted

0.04% of the float of BioLargo has been sold short.

Short Interest Ratio / Days to Cover

BioLargo has a short interest ratio ("days to cover") of 0.1, which is generally considered an acceptable ratio of short interest to trading volume.

Change versus previous month

Short interest in BioLargo has recently increased by 5.43%, indicating that investor sentiment is decreasing significantly.

News and Social Media

• Score: 4.0 / 5
• News Sentiment: N/A

News Sentiment

BioLargo has a news sentiment score of 1.16. This score is calculated as an average of sentiment of articles about the company over the last seven days and ranges from 2 (good news) to -2 (bad news). This is a higher news sentiment than the 0.90 average news sentiment score of Construction companies.

News Coverage This Week

MarketBeat has tracked 1 news article for BioLargo this week, compared to 0 articles on an average week.

Search Interest

1 people have searched for BLGO on MarketBeat in the last 30 days.

MarketBeat Follows

3 people have added BioLargo to their MarketBeat watchlist in the last 30 days.

Company Ownership

• Score: 1.7 / 5
• Insider Trading: N/A

Insider Buying vs. Insider Selling

In the past three months, BioLargo insiders have not sold or bought any company stock.

Percentage Held by Insiders

20.30% of the stock of BioLargo is held by insiders. A high percentage of insider ownership can be a sign of company health.

Percentage Held by Institutions

Only 0.04% of the stock of BioLargo is held by institutions.

BLGO Stock Analysis - Frequently Asked Questions

How have BLGO shares performed this year?

BioLargo's stock was trading at $0.19 on January 1st, 2025. Since then, BLGO shares have increased by 2.7% and is now trading at $0.1951.

How do I buy shares of BioLargo?

Shares of BLGO stock can be purchased through any online brokerage account. Popular online brokerages with access to the U.S. stock market include Charles Schwab, E*TRADE, Fidelity, and Vanguard Brokerage Services.

What other stocks do shareholders of BioLargo own?

Based on aggregate information from My MarketBeat watchlists, some other companies that BioLargo investors own include Hydrofarm Holdings Group (HYFM), Avino Silver & Gold Mines (ASM), Meta Platforms (META), Micron Technology (MU), Petroleo Brasileiro S.A.- Petrobras (PBR), Clean Energy Fuels (CLNE) and FuelCell Energy (FCEL).

Company Calendar

• Today: 7/16/2025
• Fiscal Year End: 12/31/2025

Industry, Sector and Symbol

• Stock Exchange: NASDAQ
• Sector: Construction
• Industry: Chemicals & allied products
• Sub-Industry: Chemicals
• Current Symbol: NASDAQ:BLGO
• CIK: 880242
• Web: www.biolargo.com
• Phone: (888) 400-2863
• Fax: 949-625-9819
• Employees: 30
• Year Founded: 1989

Profitability

• EPS (Trailing Twelve Months): ($0.01)
• Trailing P/E Ratio: N/A
• Forward P/E Ratio: N/A
• P/E Growth: N/A
• Net Income: -$3.50 million
• Net Margins: -11.45%
• Pretax Margin: -19.65%
• Return on Equity: -39.90%
• Return on Assets: -22.06%

Debt

• Debt-to-Equity Ratio: 0.03
• Current Ratio: 2.31
• Quick Ratio: 2.24

Sales & Book Value

• Annual Sales: $12.23 million
• Price / Sales: 4.99
• Cash Flow: N/A
• Price / Cash Flow: N/A
• Book Value: $0.01 per share
• Price / Book: 19.95

Miscellaneous

• Outstanding Shares: 306,112,000
• Free Float: 240,168,000
• Market Cap: $61.07 million
• Optionable: Not Optionable
• Beta: 0.11