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ATO in the 13F filings

Atmos Energy Corp · CUSIP 049560105

Sector · UtilitiesTheme · Energy and power infrastructure· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
28
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 7 listed it in both
Shares listed
24,592,716
combined, among listed positions
Reported value
$4.5bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 19 buyers (opened or added shares) and 11 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +497,238.

Managers listing ATO in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

28 of 28 holders

ActionFiling
Wellington Management Group LLP9,651,472$1.8bn0.33%Trimmed-359,03615 May 2026 (the filing on sec.gov)
Capital Research Global Investors4,010,550$741m0.11%Newnew13 May 2026 (the filing on sec.gov)
Invesco Ltd3,007,306$556m0.05%Trimmed-6,46812 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc2,715,107$502m0.06%Trimmed-3,881,95715 May 2026 (the filing on sec.gov)
MFS Investment Management1,772,601$331m0.11%Trimmed-202,85914 May 2026 (the filing on sec.gov)
AQR Capital Management LLC822,776$151m0.07%Added+316,15915 May 2026 (the filing on sec.gov)
Citadel Advisors LLC751,604$139munder 0.1%Added+219,75515 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC601,090$111m0.08%Added+4,17727 Oct 2026 (the filing on sec.gov)
Millennium Management LLC261,421$48munder 0.1%Added+194,43615 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC166,800$31munder 0.1%Added+114,80014 May 2026 (the filing on sec.gov)
Man Group PLC161,505$30m0.05%Added+27,96315 May 2026 (the filing on sec.gov)
AllianceBernstein LP169,829$28munder 0.1%Trimmed-11,53515 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)125,494$23munder 0.1%Added+12,52915 May 2026 (the filing on sec.gov)
Two Sigma Investments LP89,985$17munder 0.1%Added+86,38115 May 2026 (the filing on sec.gov)
Verition Fund Management LLC70,463$13m0.08%Added+64,17615 May 2026 (the filing on sec.gov)
Tudor Investment Corp46,989$8.7munder 0.1%Added+29,55015 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC39,215$7.2munder 0.1%Trimmed-58,92015 May 2026 (the filing on sec.gov)
Woodline Partners LP32,260$6.0munder 0.1%Added+4,87215 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP24,199$4.5munder 0.1%Trimmed-20,50815 May 2026 (the filing on sec.gov)
PDT Partners LLC14,560$2.7m0.16%Added+6,91915 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd14,521$2.7munder 0.1%Added+6,62418 May 2026 (the filing on sec.gov)
Jane Street Group LLC11,810$2.2munder 0.1%Added+2,14612 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC10,480$1.9munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP8,038$1.5munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Holocene Advisors LP6,502$1.2munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (5)

Exited (2)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
6 in Q3 2024 to 16 in Q2 2026

Tracked managers listing it, at least.

051015202014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ATO by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20134$121mn.a.n.a.
Q3 20131$111mn.a.n.a.
Q4 20131$117mn.a.n.a.
Q1 20143$102mn.a.n.a.
Q2 20143$159mn.a.n.a.
Q3 20146$162mn.a.n.a.
Q4 20144$162mn.a.n.a.
Q1 20155$98mn.a.n.a.
Q2 20154$70mn.a.n.a.
Q3 20155$360mn.a.n.a.
Q4 20155$413mn.a.n.a.
Q1 20169$747mn.a.n.a.
Q2 20166$473mn.a.n.a.
Q3 20166$424mn.a.n.a.
Q4 20168$420mn.a.n.a.
Q1 20176$424mn.a.n.a.
Q2 20174$481mn.a.n.a.
Q3 20178$534mn.a.n.a.
Q4 20178$516mn.a.n.a.
Q1 20186$675mn.a.n.a.
Q2 20185$677mn.a.n.a.
Q3 20184$670mn.a.n.a.
Q4 201810$1.0bnn.a.n.a.
Q1 20198$1.2bnn.a.n.a.
Q2 20198$1.2bnn.a.n.a.
Q3 201911$1.3bnn.a.n.a.
Q4 20199$1.0bnn.a.n.a.
Q1 202010$869mn.a.n.a.
Q2 20208$1.2bnn.a.n.a.
Q3 20208$1.1bnn.a.n.a.
Q4 202010$520mn.a.n.a.
Q1 20216$217mn.a.n.a.
Q2 20216$435mn.a.n.a.
Q3 20214$408mn.a.n.a.
Q4 20217$726mn.a.n.a.
Q1 20225$543mn.a.n.a.
Q2 202213$686mn.a.n.a.
Q3 202214$1.5bnn.a.n.a.
Q4 202213$1.6bnn.a.n.a.
Q1 202312$1.6bnn.a.n.a.
Q2 202310$1.6bnn.a.n.a.
Q3 202310$1.5bnn.a.n.a.
Q4 202311$1.9bn102
Q1 20248$2.0bn62
Q2 202411$2.7bn100
Q3 20246$3.9bn52
Q4 20249$3.8bn35
Q1 20259$4.0bn45
Q2 20259$4.0bn73
Q3 20258$4.3bn53
Q4 20257$3.7bn1215
Q1 202611$4.3bn1911
Q2 202616$4.4bn268

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

ATO and GEV →ATO and XOM →ATO and CVX →Choose a stock to compare with ATO →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own ATO, latest filings →Back to the 13F Explorer →