Atmos Energy (ATO) Stock Chart & Stock Price History $168.03 +1.24 (+0.74%) Closing price 08/22/2025 03:59 PM EasternExtended Trading$168.00 -0.03 (-0.02%) As of 05:22 AM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Atmos Energy Stock Price Performance The Atmos Energy (ATO) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 29.17%, with a year-to-date return of 20.65%. In the past month, the stock has increased 7.04%, reflecting recent market activity. As of the latest close, Atmos Energy traded at $168.03 with a market cap of $26.97 billion and volume of 719,982 shares. Five years ago, the stock traded at $100.44, representing a 67.30% increase over that period. At the time, it had a market cap of $12.44 billion and a volume of 463,635 shares. Receive ATO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Atmos Energy and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+1.24%1 Month Performance+7.04%3 Month Performance+6.84%Year-To-Date Performance+20.65%1 Year Performance+29.17%5 Year Performance+67.30% ATO Stock Chart for Monday, August, 25, 2025 ATO Chart by TradingView Atmos Energy 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 Capitalization08/22/2025$166.84$168.03+0.72%$168.86$167.16719,982 shs$26.97 billion08/21/2025$165.98$166.84+0.52%$167.15$165.62514,416 shs$26.78 billion08/20/2025$165.72$165.98+0.16%$167.85$165.57766,223 shs$26.64 billion08/19/2025$164.13$165.72+0.97%$165.88$163.77657,231 shs$26.60 billion08/18/2025$165.18$164.13-0.64%$165.35$163.82869,985 shs$26.35 billion08/15/2025$166.22$165.18-0.63%$166.66$164.86968,653 shs$26.51 billion08/14/2025$166.92$166.22-0.42%$167.44$165.69646,686 shs$26.68 billion08/13/2025$165.89$166.92+0.62%$166.99$164.51861,359 shs$26.79 billion08/12/2025$165.01$165.89+0.53%$165.95$163.701.01 million shs$26.63 billion08/11/2025$164.34$165.01+0.41%$165.16$163.331.29 million shs$26.49 billion Get the Latest News and Ratings for ATO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Atmos Energy and its competitors with MarketBeat's FREE daily newsletter. 08/08/2025$162.45$164.34+1.16%$166.37$162.731.42 million shs$26.10 billion08/07/2025$157.20$162.45+3.34%$166.43$160.912.04 million shs$25.80 billion08/06/2025$156.70$157.20+0.32%$158.57$155.561.41 million shs$24.97 billion08/05/2025$159.53$156.70-1.78%$160.00$156.44863,190 shs$24.89 billion08/04/2025$155.77$159.53+2.42%$159.76$155.881.09 million shs$25.34 billion08/01/2025$155.95$155.77-0.12%$157.49$154.62829,913 shs$24.74 billion07/31/2025$156.41$155.95-0.29%$156.87$154.551.13 million shs$24.77 billion07/30/2025$156.01$156.41+0.26%$157.54$155.75620,017 shs$24.84 billion07/29/2025$154.55$156.01+0.94%$156.53$154.53614,337 shs$24.78 billion07/28/2025$156.98$154.55-1.55%$156.59$154.23734,529 shs$24.55 billion07/25/2025$157.70$156.98-0.46%$158.02$156.12533,687 shs$24.93 billion07/24/2025$157.21$157.70+0.31%$158.55$157.08451,107 shs$25.05 billion Related Companies LNT Stock Price Chart AEE Stock Price Chart AWK Stock Price Chart MDU Stock Price Chart NFG Stock Price Chart NJR Stock Price Chart OGS Stock Price Chart SR Stock Price Chart UGI Stock Price Chart WEC Stock Price Chart Receive ATO Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Atmos Energy and its competitors with MarketBeat's FREE daily newsletter. 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