TransAlta (TAC) Stock Chart & Stock Price History $9.35 -0.13 (-1.32%) Closing price 03:59 PM EasternExtended Trading$9.35 0.00 (0.00%) As of 05:26 PM 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 5 Day Performance-2.91%1 Month Performance-9.67%3 Month Performance-33.96%6 Month Performance-9.80%Year-To-Date Performance-33.96%1 Year Performance+45.33% 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 TAC Stock Chart for Monday, March, 31, 2025 TAC Chart by TradingViewRemove Ads TransAlta Stock Price History Daily Weekly Monthly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year Time Frame * Start Date * End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization03/31/2025$9.47$9.35-1.27%$9.41$9.191.52 million shs$2.78 billion03/28/2025$9.41$9.47+0.63%$9.60$9.341.12 million shs$2.82 billion03/27/2025$9.63$9.41-2.28%$9.64$9.381.02 million shs$2.80 billion03/26/2025$9.83$9.63-2.09%$9.88$9.56823,076 shs$2.86 billion03/25/2025$9.78$9.83+0.56%$9.85$9.64846,643 shs$2.93 billion03/24/2025$9.76$9.78+0.19%$9.98$9.701.35 million shs$2.91 billion03/21/2025$9.78$9.76-0.19%$9.84$9.622.18 million shs$2.90 billion03/20/2025$9.80$9.78-0.20%$9.86$9.72560,206 shs$2.91 billion03/19/2025$9.58$9.80+2.30%$9.81$9.53781,656 shs$2.91 billion03/18/2025$9.69$9.58-1.14%$9.67$9.40792,986 shs$2.85 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. 03/17/2025$9.54$9.69+1.57%$9.70$9.451.50 million shs$2.88 billion03/14/2025$9.41$9.54+1.38%$9.55$9.381.56 million shs$2.84 billion03/13/2025$9.64$9.41-2.39%$9.74$9.38800,615 shs$2.80 billion03/12/2025$9.35$9.64+3.10%$9.81$9.301.49 million shs$2.87 billion03/11/2025$8.75$9.35+6.86%$9.40$8.693.06 million shs$2.78 billion03/10/2025$9.32$8.75-6.12%$9.21$8.542.41 million shs$2.60 billion03/07/2025$9.39$9.32-0.77%$9.58$9.262.61 million shs$2.77 billion03/06/2025$9.84$9.39-4.56%$9.74$9.291.73 million shs$2.79 billion03/05/2025$9.69$9.84+1.46%$9.96$9.701.45 million shs$2.93 billion03/04/2025$10.10$9.69-4.03%$9.98$9.682.13 million shs$2.88 billion03/03/2025$10.35$10.10-2.37%$10.56$10.001.62 million shs$3.01 billion02/28/2025$10.16$10.35+1.78%$10.37$10.033.45 million shs$3.08 billion Related Companies Essential Utilities Stock Chart DT Midstream Stock Chart Talen Energy Stock Chart Korea Electric Power Stock Chart Kinetik Stock Chart Companhia Paranaense de Energia 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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