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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 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
25
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 8 listed it in both
Shares listed
24,095,478
combined, among listed positions
Reported value
$4.0bn
combined, at the quarter end

Among the 92 comparable managers: 12 buyers (opened or added shares) and 15 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -1,936,058.

Managers listing ATO in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

25 of 25 holders

ActionFiling
Wellington Management Group LLP10,010,508$1.7bn0.29%Trimmed-457,32017 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc6,597,064$1.1bn0.12%Trimmed-1,220,13217 Feb 2026 (the filing on sec.gov)
Invesco Ltd3,013,774$505munder 0.1%Trimmed-85,58619 Feb 2026 (the filing on sec.gov)
MFS Investment Management1,975,460$331m0.11%Added+25,96322 Jan 2026 (the filing on sec.gov)
Neuberger Berman Group LLC596,913$100m0.07%Trimmed-7,36827 Oct 2026 (the filing on sec.gov)
Citadel Advisors LLC531,849$89munder 0.1%Added+381,22617 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC506,617$85munder 0.1%Added+18,42317 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP181,364$30munder 0.1%Trimmed-2,27717 Feb 2026 (the filing on sec.gov)
Man Group PLC133,542$22munder 0.1%Added+32,95617 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)112,965$19munder 0.1%Added+16,79617 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC98,135$16munder 0.1%Trimmed-392,35013 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.73,350$12munder 0.1%Added+63,20417 Feb 2026 (the filing on sec.gov)
Millennium Management LLC66,985$11munder 0.1%Added+6,55917 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC52,000$8.7munder 0.1%Trimmed-21,40012 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP44,707$7.5munder 0.1%Added+4,94517 Feb 2026 (the filing on sec.gov)
Woodline Partners LP27,388$4.6munder 0.1%Added+6,17317 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp17,439$2.9munder 0.1%Trimmed-10,46417 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC12,716$2.1munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC9,664$1.6munder 0.1%Trimmed-108,97012 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd7,897$1.3munder 0.1%Added+32017 Feb 2026 (the filing on sec.gov)
PDT Partners LLC7,641$1.3m0.08%Held017 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC6,287$1.1munder 0.1%Trimmed-35,96013 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP5,026$843kunder 0.1%Trimmed-100,32013 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP3,604$604kunder 0.1%Trimmed-43,96017 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC2,583$433kunder 0.1%Added+14717 Feb 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, 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 (1)

Exited (3)

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 →