TransAlta (TAC) Stock Chart & Stock Price History $10.48 +0.08 (+0.72%) Closing price 06/11/2025 03:58 PM EasternExtended Trading$10.47 0.00 (-0.05%) As of 04:00 AM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours 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 46.30%, with a year-to-date return of -25.97%. In the past month, the stock has increased 17.76%, reflecting recent market activity. As of the latest close, TransAlta traded at $10.48 with a market cap of $3.11 billion and volume of 2.33 million shares. Five years ago, the stock traded at $5.73, representing a 82.81% increase over that period. At the time, it had a market cap of $1.65 billion and a volume of 284,700 shares. 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. Email Address 5 Day Performance+1.11%1 Month Performance+17.76%3 Month Performance+8.72%Year-To-Date Performance-25.97%1 Year Performance+46.30%5 Year Performance+82.81% TAC Stock Chart for Thursday, June, 12, 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 Capitalization06/11/2025$10.40$10.48+0.77%$10.77$10.312.33 million shs$3.11 billion06/10/2025$10.41$10.40-0.10%$10.44$10.221.89 million shs$3.08 billion06/09/2025$10.36$10.41+0.43%$10.48$10.252.99 million shs$3.08 billion06/06/2025$10.30$10.36+0.63%$10.41$10.192.34 million shs$3.07 billion06/05/2025$10.14$10.30+1.53%$10.67$10.121.91 million shs$3.05 billion06/04/2025$10.39$10.14-2.44%$10.47$10.021.31 million shs$3.01 billion06/03/2025$9.89$10.39+5.10%$10.51$9.932.05 million shs$3.08 billion06/02/2025$9.77$9.89+1.23%$9.89$9.621.11 million shs$2.93 billion05/30/2025$9.72$9.77+0.57%$9.85$9.521.94 million shs$2.90 billion05/29/2025$9.67$9.72+0.52%$9.79$9.591.79 million shs$2.88 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. 05/28/2025$9.44$9.67+2.38%$9.73$9.431.89 million shs$2.87 billion05/27/2025$9.16$9.44+3.11%$9.48$9.151.85 million shs$2.80 billion05/26/2025$9.16$9.16$9.16$8.841.43 million shs$2.71 billion05/23/2025$8.95$9.16+2.29%$9.16$8.841.43 million shs$2.71 billion05/22/2025$8.88$8.95+0.85%$8.96$8.73703,489 shs$2.65 billion05/21/2025$9.15$8.88-3.01%$9.16$8.87815,936 shs$2.63 billion05/20/2025$8.97$9.15+2.01%$9.16$8.941.70 million shs$2.71 billion05/19/2025$9.10$8.97-1.43%$9.02$8.93712,710 shs$2.66 billion05/16/2025$9.08$9.10+0.22%$9.18$9.00824,842 shs$2.70 billion05/15/2025$8.98$9.08+1.11%$9.20$8.911.18 million shs$2.69 billion05/14/2025$9.14$8.98-1.75%$9.18$8.931.34 million shs$2.66 billion05/13/2025$8.90$9.14+2.75%$9.22$8.83689,917 shs$2.71 billion05/12/2025$8.67$8.90+2.60%$8.94$8.731.09 million shs$2.64 billion Related Companies Talen Energy Stock Chart DT Midstream Stock Chart Essential Utilities Stock Chart Companhia Paranaense de Energia Stock Chart Oklo Stock Chart Kinetik Stock Chart Brookfield Renewable Partners Stock Chart EnLink Midstream Stock Chart Clearway Energy Stock Chart TXNM Energy 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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