ATCO (ACO.Y) Stock Chart & Stock Price History C$50.75 -1.24 (-2.39%) As of 09:33 AM Eastern Add Compare Share Share Chart Stock AnalysisChartCompetitorsHeadlinesBuy This Stock ATCO Stock Price Performance The ATCO (ACO.Y) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 11.05%, with a year-to-date return of 3.78%. In the past month, the stock has decreased 3.33%, reflecting recent market activity. As of the latest close, ATCO traded at C$51.99 with a market cap of C$646.24 million and volume of 3,000 shares. Receive ACO.Y 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-3.79%1 Month Performance-3.33%3 Month PerformanceN/AYear-To-Date PerformanceN/A1 Year Performance+11.05% ACO.Y Stock Chart for Wednesday, August, 27, 2025 ACO.Y 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 Capitalization08/26/2025C$52.00C$51.99-0.02%C$52.76C$51.263,000 shsC$646.24 million08/25/2025C$52.75C$52.00-1.42%C$52.00C$52.00318 shsC$646.36 million08/22/2025C$51.17C$52.75+3.09%C$52.76C$52.75300 shsC$655.68 million08/21/2025C$52.89C$51.17-3.25%C$51.17C$51.17144 shsC$636.04 million08/20/2025C$52.00C$52.89+1.71%C$52.89C$52.89300 shsC$657.42 million08/19/2025C$52.00C$52.00C$52.50C$52.00601 shsC$646.36 million08/18/2025C$51.76C$52.00+0.46%C$52.50C$52.00601 shsC$646.36 million08/11/2025C$51.76C$51.76C$52.00C$51.761,100 shsC$643.38 million08/08/2025C$51.75C$51.76+0.02%C$52.00C$51.761,100 shsC$643.38 million08/07/2025C$51.75C$51.75C$52.50C$51.75700 shsC$643.25 million Get the Latest News and Ratings for ACO.Y 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. 08/06/2025C$52.04C$51.75-0.56%C$52.50C$51.75700 shsC$643.25 million08/05/2025C$52.50C$52.04-0.88%C$52.04C$52.03240 shsC$646.86 million07/30/2025C$52.50C$52.50C$52.50C$52.50200 shsC$652.58 million07/29/2025C$52.50C$52.50C$52.50C$52.50200 shsC$652.58 million07/28/2025C$52.50C$52.50C$52.50C$52.50200 shsC$652.58 million Related Companies Brookfield Infrastructure Partners Stock Price Chart Canadian Utilities Stock Price Chart ATCO Stock Price Chart Superior Plus Stock Price Chart Caribbean Utilities Stock Price Chart Maxim Power Stock Price Chart Polaris Renewable Energy Stock Price Chart Tidewater Renewables Stock Price Chart Green Impact Partners Stock Price Chart Synex Renewable Energy Stock Price Chart Receive ACO.Y 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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