BioLargo (BLGO) Stock Chart & Stock Price History $0.20 +0.01 (+5.21%) As of 08/22/2025 03:36 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 13.23%, with a year-to-date return of 4.21%. In the past month, the stock has increased 8.08%, reflecting recent market activity. As of the latest close, BioLargo traded at $0.20 with a market cap of $61.02 million and volume of 190,581 shares. Five years ago, the stock traded at $0.16, representing a 21.32% increase over that period. At the time, it had a market cap of $36.51 million and a volume of 424,242 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. Email Address 5 Day Performance+6.11%1 Month Performance+8.08%3 Month Performance-9.13%Year-To-Date Performance+4.21%1 Year Performance-13.23%5 Year Performance+21.32% BLGO Stock Chart for Sunday, August, 24, 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 Capitalization08/22/2025$0.19$0.20+5.21%$0.20$0.19190,581 shs$61.02 million08/21/2025$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 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. 08/08/2025$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 million08/01/2025$0.18$0.18+0.50%$0.19$0.17328,206 shs$55.23 million07/31/2025$0.18$0.18+1.65%$0.18$0.17521,041 shs$54.96 million07/30/2025$0.18$0.18-2.81%$0.18$0.17275,328 shs$54.02 million07/29/2025$0.18$0.18+0.67%$0.18$0.17387,738 shs$55.59 million07/28/2025$0.19$0.18-4.91%$0.19$0.18393,266 shs$55.22 million07/25/2025$0.18$0.19+3.33%$0.19$0.18227,723 shs$58.04 million07/24/2025$0.18$0.18-0.43%$0.18$0.18331,471 shs$56.08 million07/23/2025$0.19$0.18-0.54%$0.19$0.17626,999 shs$56.33 million Related Companies AMTX Stock Chart VGAS Stock Chart FSI Stock Chart TSE Stock Chart ORGN Stock Chart ALTO Stock Chart LODE Stock Chart ZTEK Stock Chart LOOP Stock Chart LNZA 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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