BioLargo (BLGO) Stock Price

BioLargo Price

OTC·CLOSED
0.11USD-0.0047 (-4.18 %)
Market closed

Over the last 18 years BioLargo grew revenue by 28.9% annually, reaching 7.77 M USD. For BioLargo, the net margin of -151.7% is up versus -279.8% a few years ago. The consensus 12-month price target for BioLargo is 0.33 USD, about 196.7% above where the stock trades today. Of 7 analysts, 6 rate the stock a buy — an overall Buy consensus. The stock trades about 10% above its 52-week low.

BioLargo stock price

Volume
Details

Stock Price

How to Read This Chart

This chart tracks the historical stock price of BioLargo over time. You can switch between daily, weekly, and monthly views and select custom time ranges — from a single day to the full available history. Use the toggle to view price changes in absolute currency terms or as a percentage change relative to the starting date.

Total Return vs. Price Return

The "Total Return" toggle includes reinvested dividends on top of the pure price movement. This is critical because dividends can account for a significant portion of long-term returns. Historically, roughly 40 % of the S&P 500's total return has come from dividends. Always compare total return when evaluating a stock's real performance against a benchmark.

Intraday Price Data

When viewing a one-day time frame, the chart displays real-time intraday price movements. This is useful for observing how BioLargo stock reacts to market openings, earnings releases, or breaking news throughout the trading session.

What to Look For

Look for long-term trends (sustained upward or downward movements over months and years), support and resistance levels (price zones where the stock repeatedly bounces or reverses), and volatility (how much the price fluctuates day to day). Comparing BioLargo's price chart to a market index like the S&P 500 can reveal whether the stock is outperforming or underperforming the broader market.

BioLargo Stock Price History
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Access this data via the Eulerpool API

BioLargo Revenue, EBIT, Net Income

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  • 5 Years

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  • 25 Years

  • Max

Revenue
EBIT
Net Income
Details
Date
Revenue
EBIT
Net Income
Jan 1, 2019
1.86 M USD
-6.70 M USD
-10.69 M USD
Jan 1, 2020
2.43 M USD
-7.59 M USD
-8.43 M USD
Jan 1, 2021
2.53 M USD
-6.44 M USD
-7.08 M USD
Jan 1, 2022
5.88 M USD
-5.20 M USD
-4.47 M USD
Jan 1, 2023
12.23 M USD
-4.19 M USD
-3.50 M USD
Jan 1, 2024
17.78 M USD
-4.33 M USD
-2.40 M USD
Jan 1, 2025
7.77 M USD
-10.96 M USD
-11.78 M USD
Jan 1, 2026 (e)
5.00 M USD
-16.66 M USD
-12.52 M USD

BioLargo Income Statement, Balance Sheet, Cash Flow Statement

Last updated Jul 12, 2026, 10:08 AM
 
REVENUEM USD
REVENUE GROWTH%
GROSS MARGIN%
GROSS INCOMEM USD
NET INCOMEM USD
NET INCOME GROWTH%
SHARESM
2011201220132014201520162017201820192020202120222023202420252026e
1.001.002.002.005.0012.0017.007.004.00
100.00150.00140.0041.67-58.82-42.86
300.00300.0050.0050.0040.0050.0041.1842.8642.86
3.003.003.003.003.003.003.003.003.001.001.002.006.007.003.001.71
-3.00-5.00-2.00-3.00-5.00-7.00-9.00-10.00-10.00-8.00-7.00-4.00-3.00-2.00-11.00-12.00
-40.0066.67-60.0050.0066.6740.0028.5711.11-20.00-12.50-42.86-25.00-33.33450.009.09
55.7163.7572.9580.0284.1187.9498.94122.00152.09195.99247.20268.30285.96298.12306.95306.95
Details

Income Statement Key Figures

Revenue and Revenue Growth

Revenue is the starting point of every income statement — it measures the total sales BioLargo generates from its core business. Revenue growth (expressed as year-over-year percentage change) is one of the most important indicators of business momentum. Sustained growth above 10 % annually is generally considered strong, while declining revenue is a serious warning sign that demands investigation.

Gross Margin

Gross margin = (Revenue − Cost of Goods Sold) ÷ Revenue. It reveals what percentage of each dollar of revenue BioLargo retains after direct production costs. High gross margins (above 50 %) are typical of asset-light businesses like software and brands, while capital-intensive industries like manufacturing often operate below 30 %. Compare BioLargo's gross margin to industry peers and track it over time to spot improving or deteriorating pricing power.

EBIT and EBIT Margin

EBIT measures operating profit — what remains after subtracting all operating expenses (including R&D, sales, and administrative costs) from gross profit. The EBIT margin shows this as a percentage of revenue. Because it excludes interest and taxes, EBIT allows fair comparisons between companies with different debt levels and tax jurisdictions. A rising EBIT margin indicates improving operational efficiency.

Net Income and Earnings Per Share (EPS)

Net income is the company's final profit after all expenses, interest, and taxes. Dividing net income by the number of shares outstanding gives you EPS — the single most influential metric in stock valuation. Consistent EPS growth is the primary driver of long-term stock price appreciation. Always check whether EPS growth comes from genuine profit improvement or from share buybacks reducing the share count.

Shares Outstanding

The total number of shares BioLargo has issued. A declining share count (through buybacks) boosts EPS and signals management confidence. A rising share count (through stock issuance) dilutes existing shareholders. Always monitor this number alongside EPS to get the full picture of per-share value creation.

Analyst Estimates

The projected figures represent consensus estimates from professional analysts. Compare these forecasts against BioLargo's historical growth rates to assess whether expectations are realistic. A company that consistently beats consensus estimates tends to see its stock price rewarded over time, while repeated misses erode investor confidence.

BioLargo stock margins

The BioLargo margin analysis displays the gross margin, EBIT margin, as well as the profit margin of BioLargo. The EBIT margin (EBIT/sales) indicates the percentage of sales that remains as operating profit. The profit margin shows the percentage of sales that remains for BioLargo.
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Gross margin
EBIT margin
Profit margin
Details
Date
Gross margin
EBIT margin
Profit margin
Jan 1, 2019
49.46 %
-360.22 %
-574.73 %
Jan 1, 2020
50.62 %
-312.35 %
-346.91 %
Jan 1, 2021
43.48 %
-254.55 %
-279.84 %
Jan 1, 2022
48.64 %
-88.44 %
-76.02 %
Jan 1, 2023
50.32 %
-34.23 %
-28.65 %
Jan 1, 2024
44.17 %
-24.36 %
-13.51 %
Jan 1, 2025
43.86 %
-141.08 %
-151.71 %
Jan 1, 2026 (e)
43.86 %
-333.31 %
-250.58 %

BioLargo Stock Revenue, EBIT, Earnings per Share

The BioLargo earnings per share therefore indicates how much revenue BioLargo has generated per share in a given period. The earnings before interest and taxes per share shows how much of the operating profit corresponds to each share. The earnings per share indicates how much of the profit belongs to each share.
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Revenue per Share
EBIT per share
Earnings per Share
Details
Date
Revenue per Share
EBIT per share
Earnings per Share
Jan 1, 2019
0.01 USD
-0.04 USD
-0.07 USD
Jan 1, 2020
0.01 USD
-0.04 USD
-0.04 USD
Jan 1, 2021
0.01 USD
-0.03 USD
-0.03 USD
Jan 1, 2022
0.02 USD
-0.02 USD
-0.02 USD
Jan 1, 2023
0.04 USD
-0.01 USD
-0.01 USD
Jan 1, 2024
0.06 USD
-0.01 USD
-0.01 USD
Jan 1, 2025
0.03 USD
-0.04 USD
-0.04 USD
Jan 1, 2026 (e)
0.02 USD
-0.05 USD
-0.04 USD

BioLargo business model & stock analysis

BioLargo Inc is an American company that was originally founded in 1991 and is headquartered in Westminster, California. The company is active in various industries, including environment, health, and industry. BioLargo develops and markets innovative technologies and products for use in various areas. The company holds several patents worldwide and is known for its groundbreaking inventions and expertise. Answer: BioLargo Inc is an American company that develops and markets innovative technologies and products for various industries, particularly in the areas of environment, health, and industry. The company is known for its groundbreaking inventions and holds several patents worldwide.

BioLargo SWOT Analysis

Strengths

BioLargo Inc has several strengths that contribute to its competitiveness and growth potential. These include:

  • Strong Intellectual Property (IP) portfolio, providing a competitive advantage in the market.
  • Innovative and cutting-edge technologies that address pressing environmental challenges.
  • Experienced management team with a proven track record in the industry.
  • Strong partnerships and collaborations with government agencies, research institutions, and industry leaders.
  • Solid financial position with sufficient resources to support research and development efforts.

Weaknesses

Despite its strengths, BioLargo Inc also faces certain weaknesses that may pose challenges or limitations:

  • Dependence on external funding for research and development activities.
  • Relatively small market presence compared to some competitors.
  • Limited product diversification, focusing primarily on specific environmental solutions.
  • Dependency on regulatory approvals and compliance for product commercialization.
  • Higher production costs compared to conventional alternatives.

Opportunities

BioLargo Inc can leverage various opportunities to drive its future growth and expansion:

  • Increasing global demand for sustainable and eco-friendly solutions, aligning with the company's core offerings.
  • Growing governmental initiatives and regulations focused on environmental protection.
  • Potential for strategic partnerships and joint ventures to access new markets and increase market share.
  • Emerging markets with untapped potential, presenting opportunities for market penetration.
  • Advancements in technology and materials that can enhance the efficiency and cost-effectiveness of BioLargo's offerings.

Threats

BioLargo Inc faces certain threats that could hinder its growth and success in the market:

  • Intense competition from both established companies and new entrants with similar environmental solutions.
  • Economic downturns or market fluctuations that may impact customer spending and demand.
  • Unforeseen regulatory changes or delays in obtaining necessary approvals for product commercialization.
  • Rapidly evolving technology landscape, requiring continuous innovation and adaptation to maintain a competitive edge.
  • Potential environmental liabilities and risks associated with the use and disposal of the company's products.

BioLargo Segments

BioLargo Revenue by Segment (1/2)

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Product
Service
Details
Date
Product
Service
Jan 1, 2018
1.12 M USD
241,000.00 USD

BioLargo Revenue by Segment (2/2)

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Odor-No-More
BioLargo Engineering, Science & Technologies, LLC
Details
Date
Odor-No-More
BioLargo Engineering, Science & Technologies, LLC
Jan 1, 2018
1.12 M USD
241,000.00 USD

BioLargo Eulerpool Fair Value

Details

Fair Value Estimate

What Is Fair Value?

Fair value is an estimate of what a stock is truly "worth" based on its financial fundamentals, independent of the current market price. If the calculated fair value is above the current share price, the stock may be undervalued — and vice versa. This chart shows three different fair value approaches so you can cross-check them against each other.

Earnings-Based Fair Value

Calculated by multiplying the current earnings per share (EPS) by the average historical P/E ratio over a selected multi-year period. The smoothing over several years filters out temporary spikes or dips. If this fair value exceeds the market price, it suggests the stock is cheap relative to its earning power.

Example: Fair Value (Earnings) 2022 = EPS 2022 × Average P/E 2019–2021

Revenue-Based Fair Value

Derived by multiplying revenue per share by the average historical price-to-sales ratio. This method is particularly useful for companies with volatile or temporarily depressed earnings, as revenue tends to be more stable than profits. It answers: "At what price has the market historically valued each dollar of this company's sales?"

Example: Fair Value (Revenue) 2022 = Revenue per Share 2022 × Average P/S 2019–2021

Dividend-Based Fair Value

Calculated by dividing the dividend per share by the average historical dividend yield. This approach is most relevant for mature, consistently dividend-paying companies. If the resulting fair value is higher than the current price, it implies the stock offers a better yield than its historical average.

Example: Fair Value (Dividend) 2022 = Dividend per Share 2022 ÷ Average Yield 2019–2021

How to Use This Chart

When all three fair value lines converge above the current price, it strengthens the case that the stock is undervalued. When they diverge, investigate why — it may indicate a structural shift in margins, payout policy, or growth rate. The forward estimates on the right extend the analysis using projected fundamentals, helping you assess whether the current price already reflects future growth expectations.

BioLargo historical P/E ratio, EBIT multiple, and P/S ratio

BioLargo annual returns

Details

Annual Return

What This Chart Shows

This chart breaks down 's total annual return into two components: price return (gains or losses from stock price movement) and dividend return (income received from dividend payments). Together, they represent the total return an investor would have earned in each calendar year.

Price Return

Price return measures the percentage change in 's stock price from January 1st to December 31st of each year. Positive bars indicate the stock appreciated; negative bars show a decline. This is the component most investors focus on, but it tells only part of the story — especially for dividend-paying stocks.

Dividend Return

Dividend return represents the income generated from dividends paid during the year, expressed as a percentage of the starting stock price. While it may seem small in any single year (typically 1–4 % for established companies), dividends compound significantly over decades and have historically contributed roughly 40 % of total stock market returns.

What to Look For

Examine how many years showed positive vs. negative returns to gauge consistency. A stock with mostly positive years and small drawdowns suggests lower risk. Also compare 's annual returns to a benchmark index — consistently outperforming the market is a hallmark of a strong investment. Pay attention to the worst years: understanding downside risk is just as important as chasing upside potential.

BioLargo shares outstanding

The number of shares of BioLargo was 306.95 M in 2025. This indicates how many shares BioLargo is divided into. Since shareholders are the owners of a company, each share represents a small portion of the company's ownership.
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Number of stocks
Details
Date
Number of stocks
Jan 1, 2019
152.09 M Stocks
Jan 1, 2020
195.99 M Stocks
Jan 1, 2021
247.20 M Stocks
Jan 1, 2022
268.30 M Stocks
Jan 1, 2023
285.96 M Stocks
Jan 1, 2024
298.12 M Stocks
Jan 1, 2025
306.95 M Stocks
Jan 1, 2026 (e)
306.95 M Stocks

BioLargo stock splits

In BioLargo's history, there have been no stock splits.

Current BioLargo forecasts and price targets in July 2026

Analyst Price Targets 2026
Δ MOM Price Target
0.00 %
Buy85.71 % (6)
Hold14.29 % (1)
Sell0.00 % (0)
12M Price Target
0.33
Last Price
0.11
Currency
USD
12M Return Potential
196.73 %
LTM Return
0 %

BioLargo Earnings Estimates

DateEPS estimateRevenue EstimateQuarterly report
5/20/2026-0.01USD816,000.00USD2026 Q1
5/12/2026-0.01USD816,000.00USD2026 Q1
11/14/2025-0.01USD2.90 MUSD2025 Q3
8/12/2025-0.01USD3.57 MUSD2025 Q2
11/14/20240.00USD5.20 MUSD2024 Q3
11/12/20240.00USD5.02 MUSD2024 Q3
5/16/20240.00USD3.42 MUSD2024 Q1
4/1/20240.00USD2.78 MUSD2023 Q4
11/13/20230.00USD4.79 BUSD2023 Q3

BioLargo shareholder structure

% Name
8.36648%
Code (Kenneth Reay)
Code (Kenneth Reay)
3.41094%
Calvert (Dennis Patrick)
Calvert (Dennis Patrick)
1.58948%
Strommen (Jack B)
Strommen (Jack B)
0.57687%
Provenzano (Joseph L)
Provenzano (Joseph L)
0.08471%
Marshall (Dennis E)
Marshall (Dennis E)
0.06202%
Park (Linda)
Park (Linda)

BioLargo Executives and Management Board

DC

Mr. Dennis Calvert

(62)

Chairman of the Board, President, Chief Executive Officer · since 2002

Compensation317,952.00 USD
KC

Mr. Kenneth Code

(78)

Chief Scientific Officer, Director · since 2007

Compensation301,203.00 USD
JP

Mr. Joseph Provenzano

(56)

Executive Vice President - Operations, Corporate Secretary, Director · since 2002

Compensation261,451.00 USD
CD

Mr. Charles Dargan

(70)

Chief Financial Officer

Compensation233,850.00 USD
DM

Mr. Dennis Marshall

(82)

Independent Director

Compensation148,541.00 USD

Frequently asked questions about BioLargo

BioLargo Inc is a diversified environmental company focused on developing innovative technologies to address various global challenges. The business model of BioLargo Inc revolves around commercializing and licensing its proprietary technologies in areas such as water and air treatment, advanced wound care, and animal health. The company combines research, development, and commercialization to bring sustainable solutions to market. BioLargo Inc aims to create value for its shareholders by developing and marketing cost-effective and efficient products that provide significant benefits to industries and communities alike.

All fundamentals and in-depth analysis of BioLargo

Our stock analysis for BioLargo stock includes important financial indicators such as revenue, profit, P/E ratio, P/S ratio, EBIT, as well as information on dividends. We also assess aspects such as stocks, market capitalization, debt, equity, and liabilities of BioLargo. If you are looking for more detailed information on these topics, we offer comprehensive analyses on our subpages.