BioLargo - 24 Year Stock Price History | BLGO
Historical daily share price chart and data for BioLargo since 2001 adjusted for splits and dividends. The latest closing stock price for BioLargo as of August 29, 2025 is 0.21.
- The all-time high BioLargo stock closing price was 53.50 on March 08, 2002.
- The BioLargo 52-week high stock price is 0.32, which is 52.4% above the current share price.
- The BioLargo 52-week low stock price is 0.16, which is 23.8% below the current share price.
- The average BioLargo stock price for the last 52 weeks is 0.23.
For more information on how our historical price data is adjusted see the Stock Price Adjustment Guide.
| BioLargo Historical Annual Stock Price Data |
| Year |
Average Stock Price |
Year Open |
Year High |
Year Low |
Year Close |
Annual % Change |
| 2025 |
0.2312 |
0.2252 |
0.3025 |
0.1700 |
0.2130 |
12.11% |
| 2024 |
0.2605 |
0.1670 |
0.3994 |
0.1670 |
0.1900 |
13.10% |
| 2023 |
0.1870 |
0.1951 |
0.2370 |
0.1577 |
0.1680 |
-13.80% |
| 2022 |
0.2194 |
0.2182 |
0.3050 |
0.1599 |
0.1949 |
-8.15% |
| 2021 |
0.1870 |
0.1300 |
0.2500 |
0.1300 |
0.2122 |
72.52% |
| 2020 |
0.1700 |
0.2187 |
0.2900 |
0.1150 |
0.1230 |
-43.06% |
| 2019 |
0.2352 |
0.2261 |
0.3750 |
0.1600 |
0.2160 |
-9.81% |
| 2018 |
0.2839 |
0.4119 |
0.4500 |
0.1800 |
0.2395 |
-37.79% |
| 2017 |
0.5025 |
0.8320 |
0.8320 |
0.3850 |
0.3850 |
-53.45% |
| 2016 |
0.5362 |
0.4901 |
0.9550 |
0.3111 |
0.8270 |
65.40% |
| 2015 |
0.4312 |
0.3500 |
0.7200 |
0.2600 |
0.5000 |
61.29% |
| 2014 |
0.5382 |
0.2500 |
1.0900 |
0.2400 |
0.3100 |
24.00% |
| 2013 |
0.2590 |
0.2500 |
0.3900 |
0.1500 |
0.2500 |
4.17% |
| 2012 |
0.3178 |
0.3300 |
0.4900 |
0.2200 |
0.2400 |
-25.00% |
| 2011 |
0.3938 |
0.4800 |
0.5700 |
0.2200 |
0.3200 |
-36.00% |
| 2010 |
0.3865 |
0.7000 |
0.7000 |
0.1500 |
0.5000 |
-28.57% |
| 2009 |
0.4641 |
0.8900 |
0.8900 |
0.2100 |
0.7000 |
70.73% |
| 2008 |
1.1672 |
0.9500 |
2.0000 |
0.3500 |
0.4100 |
-57.29% |
| 2007 |
0.5760 |
0.3750 |
1.0100 |
0.3100 |
0.9600 |
220.00% |
| 2006 |
0.4980 |
0.5000 |
1.0000 |
0.2500 |
0.3000 |
1100.00% |
| 2005 |
0.3547 |
0.2500 |
1.0000 |
0.0250 |
0.0250 |
-88.89% |
| 2004 |
0.5175 |
1.0000 |
1.5000 |
0.0200 |
0.2250 |
-77.50% |
| 2003 |
2.3546 |
6.0000 |
7.0125 |
0.7500 |
1.0000 |
-85.19% |
| 2002 |
19.3785 |
48.2500 |
53.5000 |
3.2500 |
6.7500 |
-86.36% |
| Sector |
Industry |
Market Cap |
Revenue |
| Construction |
Engineering - Research & Development Services |
$0.068B |
$0.018B |
|
BioLargo Inc. is a cleantech and life sciences innovator and engineering services solution provider. The company's core products address PFAS contamination, achieve advanced water and wastewater treatment, control odor and VOCs. BioLargo Inc. is based in WESTMINSTER, CA.
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