TransAlta (TAC) Stock Chart & Stock Price History $9.14 +0.09 (+0.94%) As of 11:10 AM 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 5 Day Performance+1.50%1 Month Performance-4.45%3 Month Performance-20.60%6 Month Performance-11.05%Year-To-Date Performance-35.44%1 Year Performance+35.33% 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 Friday, May, 2, 2025 TAC Chart by TradingView 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 Capitalization05/01/2025$8.90$9.05+1.69%$9.15$8.96709,080 shs$2.70 billion04/30/2025$9.10$8.90-2.14%$9.02$8.85819,418 shs$2.65 billion04/29/2025$9.01$9.10+0.94%$9.12$8.89644,984 shs$2.71 billion04/28/2025$9.00$9.01+0.11%$9.07$8.911.14 million shs$2.69 billion04/25/2025$8.79$9.00+2.45%$9.04$8.701.49 million shs$2.68 billion04/24/2025$8.58$8.79+2.34%$8.83$8.60937,455 shs$2.62 billion04/23/2025$8.56$8.58+0.28%$8.88$8.55555,235 shs$2.56 billion04/22/2025$8.44$8.56+1.42%$8.65$8.461.17 million shs$2.55 billion04/21/2025$8.71$8.44-3.13%$8.69$8.35687,291 shs$2.52 billion04/18/2025$8.71$8.71$8.88$8.631.03 million shs$2.60 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. 04/17/2025$8.63$8.71+0.96%$8.88$8.631.03 million shs$2.60 billion04/16/2025$8.49$8.63+1.71%$8.73$8.50906,706 shs$2.57 billion04/15/2025$8.76$8.49-3.14%$8.76$8.432.07 million shs$2.53 billion04/14/2025$8.68$8.76+0.98%$8.91$8.72589,252 shs$2.61 billion04/11/2025$8.53$8.68+1.76%$8.70$8.47739,488 shs$2.59 billion04/10/2025$8.81$8.53-3.23%$9.11$8.291.24 million shs$2.54 billion04/09/2025$8.14$8.81+8.27%$8.94$7.941.92 million shs$2.62 billion04/09/2025$8.14$8.81+8.27%$8.94$7.941.92 million shs$2.62 billion04/08/2025$8.33$8.14-2.29%$8.69$8.031.32 million shs$2.42 billion04/08/2025$8.33$8.14-2.29%$8.69$8.031.32 million shs$2.42 billion04/07/2025$8.16$8.33+2.12%$8.63$7.82935,575 shs$2.48 billion04/04/2025$9.20$8.16-11.31%$8.91$8.121.99 million shs$2.43 billion04/03/2025$9.56$9.20-3.82%$9.61$9.121.13 million shs$2.74 billion04/02/2025$9.46$9.56+1.11%$9.58$9.34696,736 shs$2.85 billion04/01/2025$9.35$9.46+1.18%$9.51$9.18694,038 shs$2.82 billion Related Companies DT Midstream Stock Chart Talen Energy Stock Chart Companhia Paranaense de Energia Stock Chart Kinetik Stock Chart EnLink Midstream Stock Chart Brookfield Renewable Partners Stock Chart Clearway Energy Stock Chart TXNM Energy Stock Chart Enel Chile Stock Chart ONE Gas 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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