AltaGas (ATGFF) Stock Chart & Stock Price History $28.53 +0.01 (+0.04%) As of 11:02 AM Eastern Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartHeadlinesSEC FilingsShort InterestBuy This Stock AltaGas Stock Price Performance The AltaGas (ATGFF) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 25.46%, with a year-to-date return of 22.28%. In the past month, the stock has increased 7.01%, reflecting recent market activity. As of the latest close, AltaGas traded at $28.52 with a market cap of and volume of 432 shares. Five years ago, the stock traded at $11.11, representing a 156.71% increase over that period. At the time, it had a market cap of and a volume of 5,450 shares. Receive ATGFF 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. Email Address 5 Day Performance+1.97%1 Month Performance+7.01%3 Month Performance+7.82%Year-To-Date Performance+22.28%1 Year Performance+25.46%5 Year Performance+156.71% ATGFF Stock Chart for Friday, June, 13, 2025 ATGFF 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 Capitalization06/12/2025$28.29$28.52+0.81%$28.52$28.52432 shs$0.0006/11/2025$28.08$28.29+0.74%$28.38$28.209,957 shs$0.0006/10/2025$28.00$28.08+0.30%$28.08$27.9621,427 shs$0.0006/09/2025$27.98$28.00+0.07%$28.00$28.0021,051 shs$0.0006/06/2025$27.98$27.98$28.16$27.905,059 shs$0.0006/05/2025$28.15$27.98-0.60%$28.16$27.905,059 shs$0.0006/04/2025$28.30$28.15-0.52%$28.32$28.1526,194 shs$0.0006/03/2025$28.12$28.30+0.65%$28.45$28.301,767 shs$0.0006/02/2025$28.00$28.12+0.41%$28.15$27.9836,051 shs$0.0005/30/2025$27.70$28.00+1.08%$28.05$28.0084,861 shs$0.00 Get the Latest News and Ratings for ATGFF 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. 05/29/2025$27.48$27.70+0.80%$27.70$27.7032,830 shs$0.0005/28/2025$27.96$27.48-1.71%$27.70$27.4846,689 shs$0.0005/27/2025$27.15$27.96+2.98%$27.99$27.8252,422 shs$0.0005/26/2025$27.15$27.15$27.15$27.1517,920 shs$0.0005/23/2025$27.15$27.15$27.15$27.012,401 shs$0.0005/22/2025$27.41$27.15-0.93%$27.15$27.012,401 shs$0.0005/21/2025$26.99$27.41+1.54%$27.42$27.279,456 shs$0.0005/20/2025$27.00$26.99-0.04%$27.17$26.7663,343 shs$0.0005/19/2025$26.70$27.00+1.12%$27.00$27.00310 shs$0.0005/16/2025$26.77$26.70-0.26%$26.72$26.55105,999 shs$0.0005/15/2025$26.70$26.77+0.28%$26.77$26.64128,607 shs$0.0005/14/2025$26.66$26.70+0.14%$26.70$26.7028,507 shs$0.0005/13/2025$26.66$26.66$26.93$26.64253,416 shs$0.0005/12/2025$27.39$26.66-2.66%$26.93$26.64253,416 shs$0.00 Related Companies AMIH Stock Price Chart ARHVF Stock Price Chart AKVA Stock Price Chart BKRP Stock Price Chart BPIGF Stock Price Chart BNXR Stock Price Chart CDVIQ Stock Price Chart CYPE Stock Price Chart CHKEZ Stock Price Chart CHKEW Stock Price Chart Receive ATGFF 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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