AltaGas (ALA) Stock Chart & Stock Price History C$41.91 +0.34 (+0.82%) As of 08/14/2025 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 25.25%, with a year-to-date return of 25.18%. In the past month, the stock has increased 4.49%, reflecting recent market activity. As of the latest close, AltaGas traded at C$41.91 with a market cap of C$12.48 billion and volume of 356,897 shares. Five years ago, the stock traded at C$18.00, representing a 132.83% increase over that period. At the time, it had a market cap of C$4.88 billion and a volume of 539,530 shares. 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Email Address 5 Day Performance+1.55%1 Month Performance+4.49%3 Month Performance+12.39%Year-To-Date Performance+25.18%1 Year Performance+25.25%5 Year Performance+132.83% ALA Stock Chart for Friday, August, 15, 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 Capitalization08/14/2025C$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 billion08/01/2025C$40.91C$41.28+0.90%C$41.51C$40.19688,864 shsC$12.29 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. 07/31/2025C$40.99C$40.91-0.20%C$41.37C$40.84579,848 shsC$12.18 billion07/30/2025C$40.65C$40.99+0.84%C$41.27C$40.60479,596 shsC$12.20 billion07/29/2025C$40.16C$40.65+1.22%C$40.97C$40.161.02 million shsC$12.10 billion07/28/2025C$40.22C$40.16-0.15%C$40.23C$39.96402,370 shsC$11.96 billion07/25/2025C$40.26C$40.22-0.10%C$40.45C$40.12383,401 shsC$11.97 billion07/24/2025C$40.35C$40.26-0.22%C$40.51C$40.20512,871 shsC$11.98 billion07/23/2025C$40.17C$40.35+0.45%C$40.66C$40.06791,240 shsC$12.01 billion07/22/2025C$40.37C$40.17-0.50%C$40.69C$40.08683,904 shsC$11.96 billion07/21/2025C$40.86C$40.37-1.20%C$40.90C$40.14533,443 shsC$12.02 billion07/18/2025C$40.74C$40.86+0.29%C$41.13C$40.67505,217 shsC$12.16 billion07/17/2025C$40.05C$40.74+1.72%C$41.00C$39.941.27 million shsC$12.13 billion07/16/2025C$40.11C$40.05-0.15%C$40.31C$39.90960,107 shsC$11.92 billion07/15/2025C$39.58C$40.11+1.34%C$40.20C$39.521.03 million shsC$11.94 billion07/14/2025C$39.20C$39.58+0.97%C$39.60C$39.12388,442 shsC$11.78 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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