Atmos Energy Corporation

The full register, from 13F filings

The Register tab above is hand research: a dozen holders, each traced to the filing it came from. This asks the same question of the whole market for the quarter ended 31-mar-2026, where 998 managers reported a position. Broad where the research is deep, and shallow in the ways a 13F always is.

Built from 13F filings, which report US listed, long, US custodied positions only. A register from this source is a floor rather than a level: a holder's true position can be far larger, as BlackRock's ASML stake shows at 1.28m shares in a 13F against 26.3m in its 13G/A. Holdings held through derivatives, outside US custody, or below a manager's reporting obligation do not appear. Where a holder is marked as a family, its total sums several separate filing entities and describes something no single filing describes; the constituent entities and their share counts are listed so the total can be checked. That roll-up can legitimately exceed the family's own Schedule 13G, because a 13G is filed by one legal entity: Vanguard reports Alphabet through ten advisory entities, and The Vanguard Group Inc itself reported zero after its January 2026 disaggregation.

What a reader needs to know to read these numbers

• Confirmed this is the PARENT'S own filings, not a subsidiary's. CIK 0000731802 corresponds to 'Atmos Energy Corporation', incorporated in Texas and Virginia, Commission File Number 1-10042, IRS EIN 75-1743247, headquartered at 1800 Three Lincoln Centre, 5430 LBJ Freeway, Dallas, Texas, NYSE ticker ATO, per the cover page of its own Q3 FY2026 10-Q (filed 2026-08-05, period ended 2026-06-30). Atmos has no separately SEC-registered regulated-utility subsidiary; all distribution divisions and the pipeline business operate under this one CIK. This was checked by confirming the registrant name and address on the cover pages of the fetched 10-Q, 10-K and DEF 14A all read 'Atmos Energy Corporation'.
• Fiscal year: Atmos's fiscal year ends 30 September. The latest 10-K on file is for FY2025 (period ended 2025-09-30, filed 2025-11-14). The latest 10-Q is for the third quarter of FY2026 (period ended 2026-06-30, filed 2026-08-05), which postdates the FY2025 10-K by nearly nine months, so it is the freshest filing and was used for the share count and the holdings search. The FY2025 10-K was used for the annual Exhibit 21 subsidiaries list (10-Qs do not carry an Exhibit 21). The most recent DEF 14A is the 2026 Proxy Statement (filed 2025-12-19, for the annual meeting held 4 Feb 2026, record date 12 Dec 2025), used for the register.
• Holdings search: the Q3 FY2026 10-Q (ato-20260630.htm) and the FY2025 10-K (ato-20250930.htm) were both searched for 'equity method', 'unconsolidated', 'joint venture', 'noncontrolling interest', 'equity investment', 'investment in' and 'partnership'. Zero hits for 'equity method', 'unconsolidated', 'joint venture' and 'noncontrolling interest' in both filings. The 6 hits for 'partnership' in the 10-K are all pension-plan asset-allocation disclosures ('limited partnerships' held at net asset value inside the qualified pension trust's fair-value hierarchy note), not corporate equity stakes in an operating entity, so they are excluded per the brief. The 2 hits for 'investment in' in the 10-K refer to capital-expenditure/regulatory investment in Atmos's own distribution and transportation infrastructure, not an equity stake in another company.
• Subsidiaries examined: Exhibit 21 to the FY2025 10-K ('SUBSIDIARIES OF ATMOS ENERGY CORPORATION') lists every subsidiary with a Percent of Ownership column, and all 16 entities are stated at exactly 100%: Atmos Energy Holdings, Inc. (Delaware); Atmos Energy Kansas Securitization I, LLC (Delaware, the ratepayer-backed securitization bond issuer); Blue Flame Insurance Services, Ltd (Bermuda, the wholly owned captive insurer); Atmos Energy Louisiana Industrial Gas, LLC; Atmos Energy Services, LLC; EGASCO, LLC; Atmos Power Systems, Inc.; Atmos Pipeline and Storage, LLC; UCG Storage, Inc.; WKG Storage, Inc.; Atmos Exploration and Production, Inc.; Trans Louisiana Gas Pipeline, Inc.; Trans Louisiana Gas Storage, Inc.; Atmos Gathering Company, LLC; Phoenix Gas Gathering Company; Fort Necessity Gas Storage, LLC. No entity on the exhibit carries any ownership percentage below 100%, so there is no consolidated-but-minority-held subsidiary case here (unlike, for example, a JV Exhibit 21 line at 50% or 51%).
• Pipelines, storage facilities (Atmos Pipeline and Storage, LLC and its wholly owned storage subsidiaries UCG Storage, WKG Storage, Fort Necessity Gas Storage) and the distribution network are owned outright through 100%-owned subsidiaries. These are interests in physical ASSETS operated within Atmos's own consolidated corporate structure, not equity stakes in a separate jointly held ENTITY, and are excluded from holdings per the brief.
• Atmos's regulated gas-purchase and hedging activity (gas supply contracts, financial hedges referenced throughout the 10-Q's commodity risk disclosures) are contracts, not equity stakes in a company, and are excluded from holdings per the brief.
• holdings is an empty array: this is the sourced conclusion of the searches described above, not a default. Atmos Energy is a pure regulated natural gas distribution and pipeline/storage utility holding company with wholly owned operating and financing subsidiaries (confirmed at 100% via Exhibit 21) and no equity-method investees, joint ventures, or minority strategic stakes were found in either the 10-Q or the 10-K.
• The proxy's 5%-holder table (Security Ownership of Certain Beneficial Owners, as of record date 12 Dec 2025) discloses Vanguard, BlackRock, State Street, Capital International Investors and Wellington Management Group LLP from stale Schedule 13G/13G-A filings: Vanguard 19,344,837 sh / 12.0% (13G filed 13 Feb 2024, period 31 Dec 2023); BlackRock 12,840,023 sh / 7.9% (13G filed 25 Jan 2024, period 31 Dec 2023); State Street 11,101,980 sh / 6.9% (13G filed 25 Jan 2024, period 31 Dec 2023); Capital International Investors 10,534,540 sh / 6.5% (13G filed 13 May 2025, period 31 Mar 2025); Wellington Management Group LLP 10,467,844 sh / 6.5% (13G filed 12 Nov 2025, period 30 Sep 2025). Per the brief and the chunk-prompt's rule to prefer the fresh Q2 13F, the register above uses fresh Q2 2026 (30 Jun 2026) 13F data instead for all five, and these stale figures are kept only in each row's method_note as a reconciliation, not as the register values. The correction did not run one way: BlackRock, State Street and JPMorgan-style active managers rose versus their stale citation while Capital International Investors and Wellington fell.
• Capital Group: all six known registrants in this family were checked for Q2 2026: Capital International Investors (CIK 0001562230), Capital Research Global Investors (CIK 0001422848), Capital International, Inc./CA/ (CIK 0000895213), Capital International Sarl (CIK 0001065349), Capital World Investors (CIK 0001422849, filed 13F-HR but holds 0 ATO shares, confirmed by direct text search) and Capital Research & Management Co (CIK 0000017283, the parent registrant, filed Form 13F-NT, a notice carrying no holdings, for Q2 2026 on 2026-08-12). Because the parent filed a notice with no holdings, per the project's Vanguard-pattern rule the successors are the position; four of the six hold ATO and were summed, one holds zero, and the parent holds nothing to substitute.
• T. Rowe Price entities file value_usd in THOUSANDS on both CIKs (T. Rowe Price Associates, Inc. and T. Rowe Price Investment Management, Inc.), consistent with the pattern documented for nine other companies in this project; both figures were scaled by 1000 before recording in this file, and the implied per-share price (~$172.3) was checked against the real ATO price (~$170.51 on 18 Aug 2026) as a sanity check.
• No stock split found: the Q3 FY2026 10-Q and FY2025 10-K were searched for 'stock split', 'forward split' and 'reverse split' with zero hits. Atmos issues equity regularly through its at-the-market (ATM) program (an active $1.7 billion ATM program disclosed in the Q3 FY2026 10-Q, expiring December 2027) to fund its capital programme, which is why the share count rises steadily rather than falling: 165,845 thousand basic weighted-average shares for the nine months ended 30 Jun 2025 versus 168,345 thousand for the trailing three months ended 30 Jun 2026, and 168,988,553 shares outstanding on the 10-Q cover page as of 31 Jul 2026. All register rows are on the single common-stock CUSIP 049560105, one share class.
• Register self-gate, computed exactly as the chart formula specifies from this final file: 13 rows. The insider aggregate ('All directors, nominees and executive officers as a group (17 individuals)', 700,827 shares) has two members rolling into it (J. Kevin Akers 173,855 and Kim R. Cocklin 172,632), so it is charted at its residual (700,827 - 173,855 - 172,632 = 354,340); every other row, including Akers and Cocklin themselves, counts at full value. Total: 22,075,949 (Vanguard) + 15,237,564 (BlackRock) + 11,380,060 (State Street) + 9,327,287 (Capital Group) + 9,185,788 (Wellington) + 4,489,277 (Geode) + 2,863,719 (Morgan Stanley) + 2,596,435 (T. Rowe Price) + 1,175,136 (GQG) + 560,812 (JPMorgan) + 354,340 (officers/directors residual) + 173,855 (Akers) + 172,632 (Cocklin) = 79,592,854 shares against 168,988,553 shares outstanding = 47.10% of the company. This is above the brief's typical 25-45% band; as with the closest comparable file in this project (American Water Works, 49.47%), the reason is depth of rows rather than a double-counted or mis-based holder: this file reaches down to a 0.70% institutional holder (GQG) and a 0.33% one (JPMorgan), which is within the brief's allowance for going deeper than the top 8-12 when sourced positions are available. No holder appears twice, and every row was checked against the single CUSIP 049560105 by the filing.py 13f tool, which refuses to total across different issuers.
• 8 institutional/index rows plus 1 insider aggregate plus 2 named insiders rolling into it: 11 distinct holder identities, 13 register rows total.