ATCO (ACO.X) Stock Chart & Stock Price History C$50.78 +0.15 (+0.30%) As of 10/8/2025 04:00 PM Eastern Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsHeadlinesInsider TradesBuy This Stock ATCO Stock Price Performance The ATCO (ACO.X) stock chart highlights key performance trends across multiple timeframes. Since the beginning of the year, the stock increased 6.73%. In the past month, the stock has increased 4.19%, reflecting recent market activity. As of the latest close, ATCO traded at C$50.78 with a market cap of C$5.71 billion and volume of 134,437 shares. Five years ago, the stock traded at C$39.82, representing a 27.52% increase over that period. At the time, it had a market cap of C$4.57 billion and a volume of 84,280 shares. Receive ACO.X Stock News and Ratings via EmailSign-up to receive the latest news and ratings for ATCO 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+0.32%1 Month Performance+4.19%3 Month Performance+0.73%Year-To-Date Performance+6.73%5 Year Performance+27.52% ACO.X Stock Chart for Thursday, October, 9, 2025 ACO.X Chart by TradingView ATCO 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 Capitalization10/08/2025C$50.63C$50.78+0.30%C$50.79C$50.32134,437 shsC$5.71 billion10/07/2025C$50.55C$50.63+0.16%C$50.65C$50.13164,179 shsC$5.70 billion10/06/2025C$50.62C$50.55-0.14%C$50.59C$50.25215,498 shsC$5.69 billion10/03/2025C$50.59C$50.62+0.06%C$50.89C$50.33239,627 shsC$5.70 billion10/02/2025C$50.11C$50.59+0.96%C$50.63C$49.86116,577 shsC$5.65 billion10/01/2025C$50.38C$50.11-0.54%C$50.59C$50.05179,155 shsC$5.64 billion09/30/2025C$49.75C$50.38+1.27%C$50.50C$49.57213,713 shsC$5.67 billion09/29/2025C$49.46C$49.75+0.59%C$50.08C$49.43312,366 shsC$5.57 billion09/26/2025C$49.54C$49.46-0.16%C$49.86C$49.34303,907 shsC$5.57 billion09/25/2025C$49.09C$49.54+0.92%C$49.60C$49.02247,381 shsC$5.57 billion Get the Latest News and Ratings for ACO.X and Related StocksEnter your email address below to receive the latest news and analysts' ratings for ATCO and its competitors with MarketBeat's FREE daily newsletter. 09/24/2025C$48.79C$49.09+0.61%C$49.45C$48.90200,694 shsC$5.52 billion09/23/2025C$48.34C$48.79+0.93%C$48.85C$48.06221,710 shsC$5.49 billion09/22/2025C$47.84C$48.34+1.05%C$48.48C$47.88462,699 shsC$5.44 billion09/19/2025C$47.81C$47.84+0.06%C$48.14C$47.521.26 million shsC$5.38 billion09/18/2025C$48.15C$47.81-0.71%C$48.14C$47.71334,360 shsC$5.38 billion09/17/2025C$48.18C$48.15-0.06%C$48.43C$48.09306,754 shsC$5.42 billion09/16/2025C$48.71C$48.18-1.09%C$48.77C$48.08154,593 shsC$5.42 billion09/15/2025C$48.87C$48.71-0.33%C$49.27C$48.49313,608 shsC$5.48 billion09/12/2025C$48.68C$48.87+0.39%C$48.97C$48.44139,145 shsC$5.50 billion09/11/2025C$48.85C$48.68-0.35%C$49.00C$48.50197,550 shsC$5.48 billion09/10/2025C$48.74C$48.85+0.23%C$48.92C$48.57204,388 shsC$5.50 billion09/09/2025C$49.01C$48.74-0.55%C$49.03C$48.70151,712 shsC$5.48 billion09/08/2025C$49.00C$49.01+0.02%C$49.06C$48.86122,279 shsC$5.51 billion Related Companies BIP.UN Stock Chart CU Stock Chart ACO.Y Stock Chart EMA Stock Chart BEP.UN Stock Chart CPX Stock Chart BEPC Stock Chart BIPC Stock Chart NPI Stock Chart AQN Stock Chart Receive ACO.X Stock News and Ratings via EmailSign-up to receive the latest news and ratings for ATCO and its competitors with MarketBeat's FREE daily newsletter. 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