Tecogen (TGEN) Stock Chart & Stock Price History $9.43 +1.07 (+12.80%) As of 08/8/2025 04:10 PM Eastern Add Compare Share Share Chart Stock AnalysisChartEarningsHeadlinesOwnershipSEC FilingsShort InterestBuy This Stock Tecogen Stock Price Performance The Tecogen (TGEN) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 1,022.62%, with a year-to-date return of 543.69%. In the past month, the stock has increased 18.92%, reflecting recent market activity. As of the latest close, Tecogen traded at $9.43 with a market cap of $238.29 million and volume of 1.29 million shares. Five years ago, the stock traded at $0.69, representing a 1,266.67% increase over that period. At the time, it had a market cap of $21.15 million and a volume of 85,178 shares. Receive TGEN Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Tecogen and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+2.61%1 Month Performance+18.92%3 Month Performance+197.48%Year-To-Date Performance+543.69%1 Year Performance+1,022.62%5 Year Performance+1,266.67% TGEN Stock Chart for Monday, August, 11, 2025 TGEN Chart by TradingView Tecogen 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 Capitalization08/08/2025$8.36$9.43+12.80%$9.73$8.511.29 million shs$238.29 million08/07/2025$9.19$8.36-9.03%$9.75$8.25957,015 shs$211.25 million08/06/2025$8.48$9.19+8.37%$10.02$8.221.17 million shs$232.22 million08/05/2025$9.10$8.48-6.81%$9.87$8.42613,009 shs$214.28 million08/04/2025$9.18$9.10-0.87%$10.22$8.85768,877 shs$229.95 million08/01/2025$9.68$9.18-5.17%$9.49$8.16975,331 shs$244.60 million07/31/2025$8.38$9.68+15.51%$10.04$8.381.65 million shs$244.60 million07/30/2025$7.43$8.38+12.79%$8.73$7.521.03 million shs$211.75 million07/29/2025$7.93$7.43-6.31%$8.10$7.35453,575 shs$187.75 million07/28/2025$8.50$7.93-6.71%$8.50$7.80658,295 shs$200.38 million Get the Latest News and Ratings for TGEN and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Tecogen and its competitors with MarketBeat's FREE daily newsletter. 07/25/2025$8.35$8.50+1.80%$8.50$8.03277,515 shs$214.79 million07/24/2025$8.39$8.35-0.48%$8.68$8.18577,104 shs$211.00 million07/23/2025$7.01$8.39+19.69%$8.49$7.171.26 million shs$212.01 million07/22/2025$7.10$7.01-1.27%$7.42$6.72935,606 shs$177.14 million07/21/2025$7.72$7.10-8.03%$7.95$7.061.30 million shs$179.41 million07/18/2025$5.78$7.72+33.56%$8.09$5.905.77 million shs$195.08 million07/17/2025$6.08$5.78-4.93%$6.18$5.631.92 million shs$146.06 million07/16/2025$6.32$6.08-3.80%$6.44$5.921.17 million shs$153.64 million07/15/2025$7.50$6.32-15.73%$7.37$6.251.28 million shs$159.70 million07/14/2025$7.93$7.50-5.42%$7.85$7.01484,267 shs$189.52 million07/11/2025$8.16$7.93-2.82%$8.38$7.66281,359 shs$200.38 million07/10/2025$8.73$8.16-6.53%$9.31$7.81449,916 shs$206.20 million Related Companies NPK International Stock Price Chart Mestek Stock Price Chart Palladyne AI Stock Price Chart OMS Energy Technologies Stock Price Chart A2Z Cust2Mate Solutions Stock Price Chart AirJoule Technologies Stock Price Chart Gencor Industries Stock Price Chart Richtech Robotics Stock Price Chart Perma-Pipe International Stock Price Chart Taylor Devices Stock Price Chart Receive TGEN Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Tecogen and its competitors with MarketBeat's FREE daily newsletter. 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