AltaGas (ALA) Stock Chart & Stock Price History C$41.46 +0.19 (+0.46%) As of 04:00 PM Eastern Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsHeadlinesInsider TradesBuy This Stock AltaGas Stock Price Performance The AltaGas (ALA) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 20.87%, with a year-to-date return of 23.84%. In the past month, the stock has increased 1.62%, reflecting recent market activity. As of the latest close, AltaGas traded at C$41.27 with a market cap of C$12.35 billion and volume of 767,553 shares. Five years ago, the stock traded at C$16.78, representing a 147.08% increase over that period. At the time, it had a market cap of C$4.88 billion and a volume of 833,939 shares. Receive ALA Stock News and Ratings via EmailSign-up to receive the latest news and ratings for AltaGas and its competitors with MarketBeat's FREE daily newsletter. 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Read our full terms of service and privacy policy. 5 Day Performance+1.84%1 Month Performance+1.62%3 Month Performance+8.36%Year-To-Date Performance+23.84%1 Year Performance+20.87%5 Year Performance+147.08% ALA Stock Chart for Friday, September, 5, 2025 ALA Chart by TradingView AltaGas 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 Capitalization09/04/2025C$41.10C$41.27+0.41%C$41.56C$41.12767,553 shsC$12.35 billion09/03/2025C$41.80C$41.10-1.67%C$41.80C$40.94560,492 shsC$12.30 billion09/02/2025C$40.71C$41.80+2.68%C$41.85C$40.46786,759 shsC$12.51 billion09/01/2025C$40.71C$40.71C$41.00C$40.59470,646 shsC$12.18 billion08/29/2025C$40.82C$40.71-0.27%C$41.00C$40.59470,646 shsC$12.12 billion08/28/2025C$40.50C$40.82+0.79%C$40.86C$40.41453,017 shsC$12.15 billion08/27/2025C$40.40C$40.50+0.25%C$40.66C$40.41722,074 shsC$12.06 billion08/26/2025C$41.45C$40.40-2.53%C$41.38C$40.342.01 million shsC$12.03 billion08/25/2025C$42.17C$41.45-1.71%C$42.20C$41.31699,643 shsC$12.34 billion08/22/2025C$41.93C$42.17+0.57%C$42.31C$41.87953,278 shsC$12.55 billion Get the Latest News and Ratings for ALA and Related StocksEnter your email address below to receive the latest news and analysts' ratings for AltaGas and its competitors with MarketBeat's FREE daily newsletter. 08/21/2025C$41.57C$41.93+0.87%C$42.08C$41.41559,525 shsC$12.48 billion08/20/2025C$41.58C$41.57-0.02%C$42.02C$41.55745,706 shsC$12.37 billion08/19/2025C$41.62C$41.58-0.10%C$41.73C$41.45281,893 shsC$12.38 billion08/18/2025C$41.73C$41.62-0.26%C$41.74C$41.43306,109 shsC$12.39 billion08/15/2025C$41.91C$41.73-0.43%C$42.03C$41.56910,483 shsC$12.42 billion08/14/2025C$41.57C$41.91+0.82%C$41.94C$41.30356,897 shsC$12.48 billion08/13/2025C$41.57C$41.57C$41.77C$41.51353,703 shsC$12.37 billion08/12/2025C$41.77C$41.57-0.48%C$41.94C$41.48346,885 shsC$12.37 billion08/11/2025C$41.27C$41.77+1.21%C$41.88C$41.12585,929 shsC$12.43 billion08/08/2025C$41.30C$41.27-0.07%C$41.73C$41.20298,216 shsC$12.29 billion08/07/2025C$41.16C$41.30+0.34%C$41.31C$40.95481,843 shsC$12.29 billion08/06/2025C$40.80C$41.16+0.88%C$41.17C$40.56564,027 shsC$12.25 billion08/05/2025C$41.28C$40.80-1.16%C$42.03C$40.54686,763 shsC$12.15 billion08/04/2025C$41.28C$41.28C$41.51C$40.19688,864 shsC$12.29 billion Related Companies Pembina Pipeline Stock Chart Keyera Stock Chart Gibson Energy Stock Chart Topaz Energy Stock Chart Tidewater Midstream and Infrastructure Stock Chart Enbridge Stock Chart TC Energy Stock Chart Cameco Stock Chart Cenovus Energy Stock Chart Tourmaline Oil Stock Chart Receive ALA Stock News and Ratings via EmailSign-up to receive the latest news and ratings for AltaGas and its competitors with MarketBeat's FREE daily newsletter. 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