ATMOS ENERGY CORP (ATO) Institutional Ownership Changes & 13F Activity

ATMOS ENERGY CORP (ATO). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Citadel Advisors Llc, California State Teachers Retirement System, Assenagon Asset Management S.A., Manufacturers Life Insurance Company, The, and Public Employees Retirement System Of Ohio.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Anchor Investment Management, LlcSell-800-9.8%7,372$1.27MQ2 2026Sep 15, 2026
Manufacturers Life Insurance Company, TheBuy+63,589+19.7%387,012$66.67MQ2 2026Sep 09, 2026
Integrated Wealth Concepts LlcBuy+7,760+96.7%15,788$2.72MQ2 2026Sep 09, 2026
Parkside Financial Bank & TrustSell-61-5.5%1,046$180.18KQ2 2026Sep 04, 2026
Citadel Advisors LlcBuy+984,801+131.0%1,736,405$299.13MQ2 2026Sep 02, 2026
Allianz Asset Management GmbhBuy+1,145+2.5%47,192$8.13MQ2 2026Sep 02, 2026
Brown, Lisle/Cummings, Inc.Sell-14-24.6%43$7.41KQ2 2026Sep 02, 2026
Second Line Capital, LlcSell-3-0.2%1,403$241.69KQ2 2026Sep 02, 2026
Cornerstone Financial Management LlcBuy+3+75.0%7$1.21KQ2 2026Aug 28, 2026
Corient Private Wealth LlcSell-14,271-15.1%80,046$13.79MQ2 2026Aug 27, 2026
Optimize Financial IncSell-4-0.3%1,168$201.21KQ2 2026Aug 27, 2026
Groupe La FrancaiseBuy+2,3642,364$407.25KQ2 2026Aug 25, 2026
California State Teachers Retirement SystemSell-280,692-59.2%193,061$33.26MQ2 2026Aug 24, 2026
Cyber Hornet Etfs LlcBuy+13+2.9%455$78.38KQ2 2026Aug 24, 2026
Assenagon Asset Management S.A.Buy+126,415+328.9%164,856$28.40MQ2 2026Aug 21, 2026
Mercer Global Advisors IncBuy+21,167+98.0%42,775$7.37MQ2 2026Aug 19, 2026
Kingsview Wealth Management, LlcBuy+798+15.0%6,134$1.06MQ2 2026Aug 19, 2026
Beacon Pointe Advisors, LlcSell-6,844-62.1%4,181$720.20KQ2 2026Aug 18, 2026
Fulcrum Asset Management LlpSell-4,886-99.4%28$4.90KQ2 2026Aug 18, 2026
Livforsakringsbolaget Skandia, OmsesidigtBuy+400+400.0%500$86.12KQ2 2026Aug 18, 2026
Glenview Trust CoSell-3-0.1%2,233$384.68KQ2 2026Aug 18, 2026
Public Employees Retirement System Of OhioSell-41,372-43.8%53,090$9.15MQ2 2026Aug 17, 2026
Jefferies Financial Group Inc.Buy+6,7416,741$1.16MQ2 2026Aug 17, 2026
Equitable Holdings, Inc.Buy+1,5861,586$273.17KQ2 2026Aug 17, 2026
Empowered Funds, LlcBuy+1,300+18.4%8,349$1.44MQ2 2026Aug 17, 2026
Coastal Bridge Advisors, LlcSell-878-12.4%6,210$1.07MQ2 2026Aug 17, 2026
Fsa Advisors, Inc.Buy+700+64.0%1,794$309.09KQ2 2026Aug 17, 2026
United Capital Financial Advisors, LlcSell-337-5.8%5,479$943.85KQ2 2026Aug 17, 2026
Transamerica Financial Advisors, LlcBuy+131+59.8%350$60.44KQ2 2026Aug 17, 2026
Dearborn Partners LlcBuy+60+0.0%188,329$32.44MQ2 2026Aug 17, 2026
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Frequently asked questions about ATO activity

  • Which institutional owners are buying ATO?

    Institutional owners buying ATO include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ATO activity?

    "Buy" means an investor increased their reported position in ATO compared to the prior reporting period. This reflects growing exposure to ATMOS ENERGY CORP (ATO) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ATO increasing?

    Institutional interest in ATO can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.