Welcome to our dedicated page for Atmos Energy SEC filings (Ticker: ATO), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The Atmos Energy Corporation (NYSE: ATO) SEC filings page provides access to the company’s official regulatory documents as filed with the U.S. Securities and Exchange Commission. As a fully regulated, natural gas-only distributor and S&P 500 utility headquartered in Dallas, Texas, Atmos Energy uses these filings to report on its financial condition, governance, financing activities, and executive compensation.
Key filings for Atmos Energy include annual reports on Form 10-K and quarterly reports on Form 10-Q, which present detailed information about its natural gas distribution, transmission, and storage operations, capital expenditures, regulatory outcomes, and risk factors. Current reports on Form 8-K disclose material events such as earnings releases, senior note offerings, and other significant corporate actions, including public offerings of unsecured senior notes issued under an existing indenture.
The company’s definitive proxy statement on Schedule 14A (DEF 14A) outlines board structure, director elections, committee responsibilities, and proposals submitted to shareholders, as well as extensive discussion of executive compensation, pay versus performance, and amendments to the articles of incorporation. These materials also summarize Atmos Energy’s vision to be the safest provider of natural gas services and its strategy to operate its business exceptionally well, invest in people and infrastructure, and enhance its culture.
On this page, users can review Atmos Energy’s Forms 10-K, 10-Q, 8-K, and DEF 14A as they are made available through EDGAR. AI-powered summaries help explain the contents of lengthy filings, highlight important sections such as financing transactions and governance changes, and make it easier to understand how regulatory disclosures relate to ATO stock and the company’s regulated utility business.
Atmos Energy (ATO) filed its annual report, outlining a regulated utility serving about 3.4 million customers across eight states through two segments: distribution and pipeline & storage. The company emphasizes infrastructure modernization and mechanisms that reduce regulatory lag and stabilize margins.
Ratemaking activity was a key driver in fiscal 2025. Annualized outcomes implemented totaled $333,567,000 in increased operating income, or $322,846,000 excluding EDIT impacts. Notable actions included Atmos Pipeline–Texas GRIP ($77,206,000) and Mid‑Tex DARR ($25,916,000), with Louisiana adding $22,304,000. Mid‑Tex Cities approved a Formula Rate Mechanism effective October 1, 2025 with a rate base of $8.3 billion, authorized return of 7.42%, debt/equity 42/58, and ROE 9.80%.
As of March 31, 2025, the aggregate market value of common stock held by non‑affiliates was $24,413,133,216. As of November 10, 2025, shares outstanding were 161,693,336. The company reported peak‑day distribution demand of approximately 4.2 Bcf on February 19, 2025 against estimated availability of 5.4 Bcf. At September 30, 2025, Atmos Energy had 5,487 employees.
Atmos Energy (ATO): Wellington Management Group LLP and affiliated entities filed an amended Schedule 13G reporting beneficial ownership of 10,467,844 Atmos Energy common shares, equal to 6.5% of the class, with a date of event of 09/30/2025.
The filing lists shared voting power over 9,617,937 shares and shared dispositive power over 10,467,828 shares; sole voting and dispositive power are 0. The securities are owned of record by clients of Wellington’s investment advisers. The filing states no client is known to hold more than five percent of the class. Wellington certifies the holdings were acquired and are held in the ordinary course and not for the purpose of changing or influencing control.
Atmos Energy (ATO) reported its fourth-quarter and full fiscal year 2025 results for the period ended September 30, 2025, via a news release. The company said its officers will discuss the results on a live webcasted conference call on November 6, 2025 at 10 a.m. Eastern Time, with presentation slides available on its website.
The news release was furnished as Exhibit 99.1 under Item 2.02 and is not deemed filed for purposes of Section 18 of the Exchange Act or incorporated by reference into other filings.
Atmos Energy (ATO) reported insider activity by its President & CEO and Director on 11/04/2025. The executive acquired 32,297 shares of common stock (Code M) at $172.96 from the vesting of performance-based restricted stock units under the company’s long-term incentive plan, and disposed of 12,709 shares (Code F) at $172.96 to satisfy tax withholding.
Following these transactions, direct beneficial ownership stood at 125,364.199 shares. Indirect holdings were 13,036.202 shares through the Atmos Energy Corporation Retirement Savings Plan and Trust as of November 1, 2025.
Atmos Energy (ATO) reported an insider equity change by its Sr. Vice President & CFO. On 11/04/2025, performance-based RSUs vested under the company’s 1998 Long-Term Incentive Plan, resulting in the acquisition of 7,610 shares of common stock (code M) at $172.96. To satisfy tax obligations, 2,995 shares were withheld (code F) at $172.96.
Following these transactions, the executive held 59,614.7064 shares directly. Indirect holdings were 1,422.4996 shares via the Atmos Energy Corporation Retirement Savings Plan and Trust, updated as of November 1, 2025.
Atmos Energy (ATO) reported an insider equity change by a company officer (Vice President & Controller). On 11/04/2025, 336 shares of common stock were acquired following the vesting of performance-based restricted stock units under the company’s Long-Term Incentive Plan at a reported price of $172.96 per share. In connection with the vesting, 116 shares were disposed of to satisfy tax withholding at $172.96 per share.
After these transactions, directly owned shares stood at 1,091. The filing also updates indirect holdings to 1.4047 shares through the Atmos Energy Corporation Retirement Savings Plan and Trust. An additional end-of-period update reflects dividend reinvestment activity as of November 1, 2025.
Atmos Energy Corp (ATO) reported insider equity activity by an officer (Senior Advisor) on a Form 4. On 11/04/2025, 5,396 shares were acquired upon vesting of performance-based RSUs under the company’s Long-Term Incentive Plan (transaction code M) at $172.96. To cover taxes, 2,124 shares were withheld (code F) at $172.96.
After these transactions, the reporting person beneficially owned 31,212.7159 shares directly. Indirect holdings were 1,800.1068 shares by the Atmos Energy Corporation Retirement Savings Plan and Trust as of November 1, 2025.
Atmos Energy (ATO) senior vice president, Utility Operations, reported routine insider activity on 11/04/2025. The filing shows the vesting of 5,396 shares from performance-based restricted stock units under the company’s 1998 Long-Term Incentive Plan, and the withholding of 2,124 shares to cover taxes, both at a reported price of $172.96.
After these transactions, the officer directly owned 34,594.021 shares and held 2,138.8013 shares indirectly through the Retirement Savings Plan. The filing also updates end-of-period holdings as of November 1, 2025 for shares received via automatic dividend reinvestment and for the Retirement Savings Plan.
Atmos Energy (ATO) reported insider equity activity by a company officer. On 11/04/2025, 5,396 shares were acquired via the vesting of performance-based restricted stock units at $172.96 (Code M), and 2,124 shares were withheld for taxes at $172.96 (Code F). Following these transactions, the officer directly owned 27,093.083 shares. In addition, 2,899.0165 shares were held indirectly through the Atmos Energy Corporation Retirement Savings Plan and Trust as of November 1, 2025.
Edward Geiser, a director of Atmos Energy Corp (ATO), reported a grant and holdings of phantom stock units tied to the companys common stock. The filing shows a grant dated 10/01/2025 of 191.036 phantom stock units under the companys deferred compensation election at a reported price of $170.125 per unit. The Form 4 lists total phantom stock units associated with the reporting person as 2,118.0357 and a reported post-transaction holdings figure of 1,109.3077 (as shown in the table). The filing explains that each phantom stock unit equals one share, units are granted under the 1998 Long-Term Incentive Plan, will be settled when the director leaves the Board, and include small allocations from a dividend reinvestment feature (11.11 and 4.82 units noted).
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