Atmos Energy Corp

ATO

Exchange: NYSE
Industry: Natural Gas Distribution
SEC CIK: 0000731802

SEC filings (opens in a new tab)

In the last 90 days, Atmos Energy Corp insiders filed 1 open-market purchase and 0 sales; 1,044 institutions reported holding it in 13F filings for Q2 2026, worth $28.0B in total; no superinvestor holds it.

13F holders, Q3 2026

Institutional positions in Atmos Energy Corp as of Sep 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Q3 2026 data is still coming in (13F filing deadline: Nov 16, 2026), so these numbers are incomplete.

Institutional holders: 6; +1 vs. Q2 2026
Shares held: 3.86K; +478 (+14.1%) vs. Q2 2026
Total value: $604.6K; +$21.4K (+3.7%) vs. Q2 2026
New holders: 1; 2 more added
Sold out: 0; 0 more reduced

1,039 institutions that held it in Q2 2026 haven't filed for Q3 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting ATO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holders

Value held

Institutions holding ATO and their total value by quarter
Quarter	Holders	Value
Q2 2026	1,044	$28.0B
Q1 2026	1,020	$29.6B
Q4 2025	980	$27.2B
Q3 2025	912	$27.2B
Q2 2025	871	$24.7B
Q1 2025	861	$24.4B
Q4 2024	818	$21.8B
Q3 2024	758	$20.8B
Q2 2024	736	$16.7B
Q1 2024	731	$16.6B
Q4 2023	722	$15.8B
Q3 2023	669	$14.4B
Q2 2023	672	$15.8B
Q1 2023	664	$14.7B
Q4 2022	663	$14.6B
Q3 2022	631	$13.1B
Q2 2022	620	$14.2B
Q1 2022	608	$14.9B
Q4 2021	575	$12.4B
Q3 2021	536	$9.93B
Q2 2021	548	$10.5B
Q1 2021	550	$10.7B

Institutions, Q3 2026

Shares, value and share of portfolio for each institution holding Atmos Energy Corp; share changes are against Q2 2026.

Institutions holding ATO in Q3 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
Citigroup Inc	–	–	–	–	Not filed
Exchange Traded Concepts, LLC	–	–	–	–	Not filed
California Public Employees Retirement System	–	–	–	–	Not filed
LPL Financial LLC	–	–	–	–	Not filed
M&G Plc	–	–	–	–	Not filed
Aventail Capital Group, LP	–	–	–	–	Not filed
Bank of Montreal	–	–	–	–	Not filed
Lazard Asset Management LLC	–	–	–	–	Not filed
California State Teachers Retirement System	–	–	–	–	Not filed
Balyasny Asset Management LLC	–	–	–	–	Not filed
Tudor Investment Corp Et Al	–	–	–	–	Not filed
SEI Investments Co	–	–	–	–	Not filed
Worldquant Millennium Advisors LLC	–	–	–	–	Not filed
Allspring Global Investments Holdings, LLC	–	–	–	–	Not filed
Dearborn Partners LLC	–	–	–	–	Not filed
Schroder Investment Management Group	–	–	–	–	Not filed
Magellan Asset Management Ltd	–	–	–	–	Not filed
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	–	–	–	–	Not filed
Alliancebernstein L.P.	–	–	–	–	Not filed
Two Sigma Investments, LP	–	–	–	–	Not filed
Eurizon Capital SGR S.p.A.	–	–	–	–	Not filed
Public Employees Retirement Association of Colorado	–	–	–	–	Not filed
STRS Ohio	–	–	–	–	Not filed
Tredje AP-fonden	–	–	–	–	Not filed
Maryland State Retirement & Pension System	–	–	–	–	Not filed
Universal- Beteiligungs- und Servicegesellschaft mbH	–	–	–	–	Not filed
Vanguard Investments Australia, Ltd.	–	–	–	–	Not filed
Assenagon Asset Management S.A.	–	–	–	–	Not filed
Victory Capital Management Inc	–	–	–	–	Not filed
Arbejdsmarkedets Tillaegspension	–	–	–	–	Not filed
Korea Investment CORP	–	–	–	–	Not filed
Creative Planning	–	–	–	–	Not filed
KLP Kapitalforvaltning AS	–	–	–	–	Not filed
Adage Capital Partners GP, L.L.C.	–	–	–	–	Not filed
Storebrand Asset Management AS	–	–	–	–	Not filed
Hennessy Advisors Inc	–	–	–	–	Not filed
Gotham Asset Management, LLC	–	–	–	–	Not filed
Marshall Wace, LLP	–	–	–	–	Not filed
Squarepoint Ops LLC	–	–	–	–	Not filed
State Board of Administration of Florida Retirement System	–	–	–	–	Not filed
CIBC Asset Management Inc	–	–	–	–	Not filed
Trexquant Investment LP	–	–	–	–	Not filed
Janney Montgomery Scott LLC	–	–	–	–	Not filed
Baird Financial Group, Inc.	–	–	–	–	Not filed
D. E. Shaw & Co., Inc.	–	–	–	–	Not filed
Natixis Advisors, L.P.	–	–	–	–	Not filed
Lansforsakringar Fondforvaltning AB (publ)	–	–	–	–	Not filed
Asset Management One Co.,Ltd.	–	–	–	–	Not filed
Sienna Gestion	–	–	–	–	Not filed
New York State Teachers Retirement System	–	–	–	–	Not filed
FIL Ltd	–	–	–	–	Not filed
T. Rowe Price Investment Management, Inc.	–	–	–	–	Not filed
Macquarie Group Ltd	–	–	–	–	Not filed
Schonfeld Strategic Advisors LLC	–	–	–	–	Not filed
Toronto Dominion Bank	–	–	–	–	Not filed
Occudo Quantitative Strategies LP	–	–	–	–	Not filed
Ameriprise Financial Inc	–	–	–	–	Not filed
AMF Pensionsforsakring AB	–	–	–	–	Not filed
Jones Financial Companies LLLP	–	–	–	–	Not filed
Russell Investments Group, Ltd.	–	–	–	–	Not filed
Cetera Investment Advisers	–	–	–	–	Not filed
National Bank of Canada	–	–	–	–	Not filed
Mariner, LLC	–	–	–	–	Not filed
Assetmark, Inc	–	–	–	–	Not filed
Cramer Rosenthal McGlynn LLC	–	–	–	–	Not filed
Gabelli Funds LLC	–	–	–	–	Not filed
State of Wisconsin Investment Board	–	–	–	–	Not filed
Robeco Institutional Asset Management B.V.	–	–	–	–	Not filed
Campbell & CO Investment Adviser LLC	–	–	–	–	Not filed
Edgestream Partners, L.P.	–	–	–	–	Not filed
State of Tennessee, Treasury Department	–	–	–	–	Not filed
Man Group plc	–	–	–	–	Not filed
Mather Group, LLC.	–	–	–	–	Not filed
Paradiem, LLC	–	–	–	–	Not filed
Caisse de Depot Et Placement du Quebec	–	–	–	–	Not filed
CI Private Wealth, LLC	–	–	–	–	Not filed
Engineers Gate Manager LP	–	–	–	–	Not filed
Treasurer of the State of North Carolina	–	–	–	–	Not filed
Prudential Financial Inc	–	–	–	–	Not filed
Federated Hermes, Inc.	–	–	–	–	Not filed
Mitsubishi UFJ Trust & Banking Corp	–	–	–	–	Not filed
Merewether Investment Management, LP	–	–	–	–	Not filed
ASR Vermogensbeheer N.V.	–	–	–	–	Not filed
Capital Group Private Client Services, Inc.	–	–	–	–	Not filed
Kepler Cheuvreux (Suisse) SA	–	–	–	–	Not filed
Van Eck Associates Corp	–	–	–	–	Not filed
Cerity Partners LLC	–	–	–	–	Not filed
Susquehanna International Group, LLP	–	–	–	–	Not filed
Natixis	–	–	–	–	Not filed
Capital Fund Management S.A.	–	–	–	–	Not filed
Nykredit A/S	–	–	–	–	Not filed
TD Asset Management Inc	–	–	–	–	Not filed
Resona Asset Management Co.,Ltd.	–	–	–	–	Not filed
Cresset Asset Management, LLC	–	–	–	–	Not filed
Mackenzie Financial Corp	–	–	–	–	Not filed
Diversify Advisory Services, LLC	–	–	–	–	Not filed
Diversify Wealth Management, LLC	–	–	–	–	Not filed
SEB Asset Management AB	–	–	–	–	Not filed
Aquatic Capital Management LLC	–	–	–	–	Not filed
Yousif Capital Management, LLC	–	–	–	–	Not filed