TransAlta (TAC) Stock Chart & Stock Price History $12.04 +0.03 (+0.21%) As of 12:52 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock TransAlta Stock Price Performance The TransAlta (TAC) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 48.89%, with a year-to-date return of -14.88%. In the past month, the stock has increased 15.60%, reflecting recent market activity. As of the latest close, TransAlta traded at $12.02 with a market cap of $3.56 billion and volume of 800,450 shares. Five years ago, the stock traded at $6.27, representing a 92.11% increase over that period. At the time, it had a market cap of $1.73 billion and a volume of 150,305 shares. 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Email Address 5 Day Performance-2.86%1 Month Performance+15.60%3 Month Performance+41.26%Year-To-Date Performance-14.88%1 Year Performance+48.89%5 Year Performance+92.11% TAC Stock Chart for Friday, August, 8, 2025 TAC Chart by TradingView TransAlta 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 Capitalization08/07/2025$12.17$12.02-1.23%$12.19$11.88800,450 shs$3.56 billion08/06/2025$12.09$12.17+0.62%$12.25$11.941.07 million shs$3.61 billion08/05/2025$12.56$12.09-3.70%$12.57$12.011.70 million shs$3.58 billion08/04/2025$12.40$12.56+1.25%$12.57$12.25683,753 shs$3.72 billion08/01/2025$12.04$12.40+2.99%$12.66$11.861.47 million shs$3.68 billion07/31/2025$12.26$12.04-1.79%$12.33$11.951.18 million shs$3.57 billion07/30/2025$12.09$12.26+1.45%$12.49$12.081.25 million shs$3.63 billion07/29/2025$12.19$12.09-0.86%$12.33$12.021.23 million shs$3.58 billion07/28/2025$12.27$12.19-0.61%$12.31$11.981.38 million shs$3.61 billion07/25/2025$12.33$12.27-0.49%$12.31$12.15579,722 shs$3.64 billion Get the Latest News and Ratings for TAC and Related StocksEnter your email address below to receive the latest news and analysts' ratings for TransAlta and its competitors with MarketBeat's FREE daily newsletter. 07/24/2025$12.58$12.33-2.06%$12.68$12.281.03 million shs$3.65 billion07/23/2025$12.26$12.58+2.61%$12.70$12.35885,384 shs$3.73 billion07/22/2025$12.25$12.26+0.16%$12.29$11.99676,445 shs$3.64 billion07/21/2025$12.35$12.25-0.85%$12.40$12.021.42 million shs$3.63 billion07/18/2025$12.09$12.35+2.16%$12.81$12.291.58 million shs$3.66 billion07/17/2025$11.96$12.09+1.12%$12.16$11.801.03 million shs$3.58 billion07/16/2025$11.72$11.96+2.05%$12.06$11.551.42 million shs$3.54 billion07/15/2025$11.63$11.72+0.70%$11.84$11.561.10 million shs$3.47 billion07/14/2025$11.42$11.63+1.87%$11.76$11.341.35 million shs$3.45 billion07/11/2025$11.21$11.42+1.87%$11.63$11.051.15 million shs$3.38 billion07/10/2025$10.57$11.21+6.05%$11.22$10.531.24 million shs$3.32 billion07/09/2025$10.42$10.57+1.44%$10.62$10.38758,791 shs$3.13 billion07/08/2025$10.61$10.42-1.79%$10.60$10.28791,973 shs$3.09 billion07/07/2025$10.89$10.61-2.57%$10.82$10.53773,890 shs$3.14 billion Related Companies Companhia de saneamento Basico Do Estado De Sao Paulo - Sabesp Stock Chart DT Midstream Stock Chart Essential Utilities Stock Chart Oklo Stock Chart Companhia Paranaense de Energia - Copel Stock Chart Brookfield Renewable Partners Stock Chart Kinetik Stock Chart Clearway Energy Stock Chart TXNM Energy Stock Chart Comp En De Mn Cemig ADS Stock Chart Receive TAC Stock News and Ratings via EmailSign-up to receive the latest news and ratings for TransAlta and its competitors with MarketBeat's FREE daily newsletter. 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