OTCBB:BLGO

Biolargo Stock Price (Quote)

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$0.157
+0.0001 (+0.0703%)
At Close: Nov 17, 2025

Range Low Price High Price Comment
30 days $0.152 $0.190 Monday, 17th Nov 2025 BLGO stock ended at $0.157. This is 0.0703% more than the trading day before Friday, 14th Nov 2025. During the day the stock fluctuated 5.76% from a day low at $0.152 to a day high of $0.161.
90 days $0.140 $0.234
52 weeks $0.140 $0.320

Historical BioLargo, Inc prices

Date Open High Low Close Volume
Nov 17, 2025 $0.158 $0.161 $0.152 $0.157 285 447
Nov 14, 2025 $0.169 $0.169 $0.152 $0.157 224 222
Nov 13, 2025 $0.162 $0.170 $0.162 $0.170 99 573
Nov 12, 2025 $0.169 $0.169 $0.162 $0.169 65 651
Nov 11, 2025 $0.175 $0.175 $0.161 $0.169 128 429
Nov 10, 2025 $0.183 $0.183 $0.175 $0.175 269 859
Nov 07, 2025 $0.167 $0.188 $0.164 $0.182 584 216
Nov 06, 2025 $0.160 $0.166 $0.155 $0.164 106 228
Nov 05, 2025 $0.158 $0.160 $0.158 $0.160 45 684
Nov 04, 2025 $0.159 $0.160 $0.158 $0.159 16 234
Nov 03, 2025 $0.157 $0.161 $0.155 $0.158 93 749
Oct 31, 2025 $0.161 $0.163 $0.155 $0.156 111 575
Oct 30, 2025 $0.164 $0.166 $0.160 $0.162 29 123
Oct 29, 2025 $0.160 $0.168 $0.160 $0.165 261 037
Oct 28, 2025 $0.164 $0.171 $0.160 $0.166 302 724
Oct 27, 2025 $0.166 $0.169 $0.164 $0.168 128 083
Oct 24, 2025 $0.168 $0.170 $0.163 $0.165 154 737
Oct 23, 2025 $0.167 $0.170 $0.161 $0.164 46 586
Oct 22, 2025 $0.173 $0.173 $0.166 $0.167 206 546
Oct 21, 2025 $0.170 $0.182 $0.165 $0.174 252 160
Oct 20, 2025 $0.165 $0.190 $0.165 $0.188 746 889
Oct 17, 2025 $0.160 $0.167 $0.160 $0.165 308 663
Oct 16, 2025 $0.160 $0.167 $0.155 $0.157 223 350
Oct 15, 2025 $0.167 $0.170 $0.156 $0.163 233 005
Oct 14, 2025 $0.170 $0.170 $0.150 $0.167 286 799

FAQ

What are historical stock prices?
Historical stock prices refer to a stock’s recorded prices at various past points. These prices include several key figures that help investors and analysts evaluate a stock’s performance over time:
Open: Open price for the trading day.
High: Highest price for the trading day.
Low: Lowest price for the trading day.
Close: Close price for the trading day.

Additionally, historical prices often include:
Volume is the number of shares traded during the day. It indicates how actively a stock was traded and can provide insights into market sentiment and liquidity.

How can I use BLGO stock historical prices to predict future price movements?
Trend Analysis: Examine the BLGO stock’s historical trends to identify patterns that might continue.
Moving Averages: Use moving averages to detect potential reversal points.
Momentum Indicators: Apply indicators like RSI or MACD to assess the momentum and strength of price movements.
Volume Analysis: Analyze trading volume alongside price changes to gauge trend strength.
Statistical Methods: Use statistical tools such as regression analysis to model and forecast future prices based on past data.
These techniques can provide insights but should be used with risk management practices to mitigate potential losses.

What impact do stock splits have on historical price data?
When a company performs a stock split, it adjusts the historical price data to reflect the new, lower trading price as if it had always been that way.

This ensures consistency for anyone analyzing the stock’s past prices. The adjustment helps prevent misleading signals on charts, such as false sell signals or bearish trends that aren’t there. For instance, in a 2-for-1 stock split, the price per share is cut in half, which would otherwise appear as a dramatic drop on the chart. If someone didn’t know about the split, they might wrongly think something negative happened to the company. Most technical indicators would also react to this apparent drop by signaling to sell.

A stock split, while making the shares seem more affordable and potentially more attractive to investors, doesn’t alter the company’s fundamental value.

Why do the BLGO stock historical prices show a range for periods like 30 days, 90 days, and 52 weeks?
The range provides the lowest and highest prices at which the stock has traded during the specified period. This helps investors understand the stock’s volatility and price variability within that timeframe.

How can I use historical price volatility to assess risk?
High price volatility historically indicates higher risk and potentially higher returns. Investors can gauge the stock’s risk level by examining the range between high and low prices over various periods.
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ABOUT BIOLARGO, INC
BioLargo
BioLargo, Inc. invents, develops, and commercializes various platform technologies. The company's technologies solve challenging environmental problems comprising per- and polyfluoroalkyl substances contamination, advanced water and wastewater treatment, industrial odor and VOC control, air quality control, and infection control. It holds various issued patents, maintains a pipeline of products, and provides full-service environmental engineering...
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