BioLargo (BLGO) Stock Chart & Stock Price History $0.22 0.00 (-1.47%) As of 09/4/2025 03:46 PM Eastern Add Compare Share Share Chart Stock AnalysisChartCompetitorsHeadlinesSEC FilingsShort InterestTrendsBuy This Stock BioLargo Stock Price Performance The BioLargo (BLGO) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 11.32%, with a year-to-date return of 16.68%. In the past month, the stock has increased 27.49%, reflecting recent market activity. As of the latest close, BioLargo traded at $0.22 with a market cap of $68.41 million and volume of 150,976 shares. Five years ago, the stock traded at $0.17, representing a 30.80% increase over that period. At the time, it had a market cap of $36.51 million and a volume of 198,292 shares. Receive BLGO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for BioLargo and its competitors with MarketBeat's FREE daily newsletter. 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Read our full terms of service and privacy policy. 5 Day Performance+1.33%1 Month Performance+27.49%3 Month Performance+8.30%Year-To-Date Performance+16.68%1 Year Performance-11.32%5 Year Performance+30.80% BLGO Stock Chart for Friday, September, 5, 2025 BLGO Chart by TradingView BioLargo Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization09/04/2025$0.23$0.22-1.47%$0.23$0.21150,976 shs$68.41 million09/03/2025$0.22$0.23+3.59%$0.23$0.22268,410 shs$69.43 million09/02/2025$0.22$0.22-0.73%$0.22$0.20242,424 shs$67.02 million09/01/2025$0.22$0.22$0.23$0.21179,169 shs$67.52 million08/29/2025$0.22$0.22-1.84%$0.23$0.21179,169 shs$67.43 million08/28/2025$0.21$0.22+8.63%$0.23$0.21728,899 shs$68.69 million08/27/2025$0.21$0.21-0.68%$0.21$0.20375,105 shs$63.23 million08/26/2025$0.19$0.21+8.74%$0.21$0.19263,420 shs$63.67 million08/25/2025$0.20$0.19-4.04%$0.21$0.19318,127 shs$58.55 million08/22/2025$0.19$0.20+5.21%$0.20$0.19190,581 shs$61.02 million Get the Latest News and Ratings for BLGO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for BioLargo and its competitors with MarketBeat's FREE daily newsletter. 08/21/2025$0.19$0.19-0.95%$0.20$0.19450,138 shs$57.96 million08/20/2025$0.19$0.19+1.82%$0.19$0.18417,518 shs$58.52 million08/19/2025$0.18$0.19+3.90%$0.19$0.18599,304 shs$57.47 million08/18/2025$0.18$0.18+1.47%$0.18$0.17289,262 shs$55.32 million08/15/2025$0.18$0.18-3.86%$0.18$0.17345,204 shs$54.47 million08/14/2025$0.18$0.18$0.18$0.1891,230 shs$56.65 million08/13/2025$0.17$0.18+10.84%$0.19$0.17395,692 shs$56.65 million08/12/2025$0.17$0.17-0.72%$0.17$0.16495,776 shs$51.11 million08/11/2025$0.17$0.17-0.36%$0.17$0.17292,833 shs$51.48 million08/08/2025$0.17$0.17-1.24%$0.18$0.17364,136 shs$51.60 million08/07/2025$0.17$0.17-0.47%$0.17$0.17296,204 shs$52.24 million08/06/2025$0.17$0.17-1.78%$0.17$0.1782,213 shs$52.44 million08/05/2025$0.17$0.17+0.46%$0.18$0.17249,618 shs$53.39 million08/04/2025$0.18$0.17-3.78%$0.18$0.17318,486 shs$53.15 million Related Companies AMTX Stock Chart VGAS Stock Chart FSI Stock Chart TSE Stock Chart LODE Stock Chart ORGN Stock Chart ALTO Stock Chart LOOP Stock Chart CBUS Stock Chart ZTEK Stock Chart Receive BLGO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for BioLargo and its competitors with MarketBeat's FREE daily newsletter. 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