10-K comparison

Atmos Energy (ATO) 10-K risk factor changes: FY2025 vs FY2024

The 2025-09-30 10-K against the 2024-09-30 one, compared heading by heading and sentence by sentence.

Item 1A5 rewritten4 added2 removed138 unchanged

All filing items879 rewritten343 added294 removed2,388 unchanged

Read the changesGo to Item 1A

Atmos Energy Form 10-K, every itemFY2025, filed 14 November 2025, against FY2024, filed 18 November 2024FY2025 on sec.govFY2024 on sec.govRead this filingJSON

Summary

counted, not written

New Item 1A headings (0)

No risk factor heading in this filing is absent from FY2024.

Removed Item 1A headings (0)

Every FY2024 risk factor heading is still here, word for word or reworded.

A heading is new when no FY2024 heading matches it after ignoring case and punctuation, and reworded when it shares at least 60 percent of its words with one that went away. All current risk factor headings.

Sentences by item

24 items, with every count and a link to each item that changed

Underlined words on a shaded ground are new in FY2025; struck-through words were in FY2024. Sentences that are wholly new or wholly gone are labelled rather than marked.

Item 1A. Risk Factors.

5 rewritten, 4 added, 2 removed, 138 unchanged

Rewritten

In the normal course of business, as a regulated entity, we often need to place assets in service and establish historical test periods before rate cases that seek to adjust [added: our allowed returns to recover that investment can be filed.]

Rewritten

Although we have taken steps to structure current and future transactions to comply with applicable current FERC regulations, changes in FERC regulations or their [removed: interpretation by FERC or additional regulations issued by FERC in the future could also adversely affect our business, financial condition, or financial results.]

Rewritten

We constantly monitor and maintain our pipeline and distribution systems to ensure that natural gas is delivered safely, reliably, and efficiently through our network of more than [removed: 80,000] [added: 81,000] miles of distribution and transmission lines.

Rewritten

[removed: If customer] growth slows or existing customers choose to conserve their use of gas or choose another energy product, reduced gas purchases and customer billings could adversely impact our business.

Rewritten

Our long-term debt is currently rated as “investment grade” by Standard & Poor’s Corporation and Moody’s Investors Service, Inc. Similar to most companies, we rely upon access to both short-term and long-term credit and capital markets to [removed: satisfy our liquidity requirements.]

New in FY2025

interpretation by FERC or additional regulations issued by FERC in the future could also adversely affect our business, financial condition, or financial results.

New in FY2025

If customer

New in FY2025

The competition for talent has become increasingly intense.

New in FY2025

satisfy our liquidity requirements.

Dropped from FY2024

our allowed returns to recover that investment can be filed.

Dropped from FY2024

The competition for talent has become increasingly intense and we may experience increased employee turnover due to a tightening labor market.

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

140 rewritten, 28 added, 35 removed, 195 unchanged

Rewritten

These risks and uncertainties include the following: federal, state, and local regulatory and political trends and decisions, including the impact of rate proceedings before various state regulatory commissions; increased federal regulatory oversight and potential penalties; possible increased federal, state, and local regulation of the safety of our operations; possible significant costs and liabilities resulting from pipeline integrity and other similar programs and related repairs; the inherent hazards and risks involved in distributing, transporting, and storing natural gas; the availability and accessibility of contracted gas supplies, interstate pipeline, and/or storage services; increased competition from energy suppliers and alternative forms of energy; failure to attract and retain a qualified workforce; natural disasters, adverse weather, terrorist activities, or other events and other risks and uncertainties discussed herein, all of which are difficult to predict and many of which are beyond our control; failure of technology that affects the Company's business operations; the threat of cyber-attacks or acts of cyber-terrorism that could disrupt our business operations and information technology systems or result in the loss or exposure of confidential or sensitive customer, employee, or Company [added: information; the impact of new cybersecurity compliance requirements; adverse weather conditions; the impact of legislation to]

Rewritten

[removed: information; the impact of new cybersecurity compliance requirements; adverse weather conditions; the impact of legislation to] reduce or eliminate greenhouse gas emissions or fossil fuels; the impact of climate change; the capital-intensive nature of our business; our ability to continue to access the credit and capital markets to execute our business strategy; market risks beyond our control affecting our risk management activities, including commodity price volatility, counterparty performance or creditworthiness, and interest rate risk; the concentration of our operations in Texas; the impact of adverse economic conditions on our customers; changes in the availability and price of natural gas; and increased costs of providing health care benefits, along with pension and postretirement health care benefits and increased funding requirements.

Rewritten

Our commitment to this vision requires significant levels of capital spending to modernize our natural gas distribution system and operating costs to deliver natural gas safely and reliably and in [removed: full] compliance with the various safety regulations impacting our business.

Rewritten

| | | | [removed: 2024] [added: 2025] | | | | | | [removed: 2023] [added: 2024] | | | | | | [removed: 2022] [added: 2023] | | |

Rewritten

| Distribution segment | | | $ | [removed: 671,413] [added: 746,781] | | | | | $ | [removed: 580,397] [added: 671,413] | | | | | $ | [removed: 521,977] [added: 580,397] | |

Rewritten

| Pipeline and storage segment | | | [removed: 371,482] [added: 451,973] | | | | | | [removed: 305,465] [added: 371,482] | | | | | | [removed: 252,421] [added: 305,465] | | |

Rewritten

| Net income | | | $ | [removed: 1,042,895] [added: 1,198,754] | | | | | $ | [removed: 885,862] [added: 1,042,895] | | | | | $ | [removed: 774,398] [added: 885,862] | |

Rewritten

During fiscal [removed: 2024,] [added: 2025,] we recorded net income of [removed: $1,042.9] [added: $1,198.8] million, or [removed: $6.83] [added: $7.46] per diluted share, compared to net income of [removed: $885.9] [added: $1,042.9] million, or [removed: $6.10] [added: $6.83] per diluted share in the prior year.

Rewritten

The year-over-year increase in net income of [removed: $157.0] [added: $155.9] million largely reflects positive rate outcomes driven by safety and reliability spending.

Rewritten

Additionally, our [added: pipeline and storage segment's] fiscal [removed: 2024] [added: 2025] results were favorably impacted by [removed: $21.1] [added: $7.7] million as a result of [added: Texas] legislation that became effective during the [removed: first] [added: third] quarter of fiscal [removed: 2024 to reduce property tax expenses in Texas and $13.9 million as a result of a change] [added: 2025 related] to [removed: our bad debt recovery mechanism in Mississippi.][added: infrastructure spending.]

Rewritten

These increases were partially offset by [added: higher bad debt expense,] increased employee-related costs, depreciation [removed: expense,] and [removed: interest expense.][added: property tax expenses, and higher spending on safety and compliance related activities.]

Rewritten

During the year ended September 30, [removed: 2024,] [added: 2025,] we implemented ratemaking regulatory actions which resulted in an increase in annual operating income of [removed: $376.3] [added: $333.6] million.

Rewritten

Excluding the impact of the refund of excess deferred income taxes resulting from previously enacted tax reform legislation, our total fiscal [removed: 2024] [added: 2025] rate outcomes were [removed: $307.1] [added: $322.8] million.

Rewritten

Additionally, we had ratemaking efforts in progress at September 30, [removed: 2024,] [added: 2025,] seeking a total increase in annual operating income of [removed: $218.0] [added: $231.1] million.

Rewritten

During fiscal year [removed: 2024,] [added: 2025,] we refunded [removed: $133.6] [added: $78.8] million in excess deferred tax liabilities to customers.

Rewritten

These refunds also reduced our income tax expense, resulting in an immaterial impact to our fiscal [removed: 2024] [added: 2025] and [removed: 2023] [added: 2024] results.

Rewritten

Capital expenditures for fiscal [removed: 2024] [added: 2025] were [removed: $2.9] [added: $3.6] billion.

Rewritten

Approximately [removed: 83] [added: 87] percent was invested to improve the safety and reliability of our distribution and transportation systems, with a significant portion of this investment incurred under regulatory mechanisms that reduce regulatory lag to six months or less.

Rewritten

During fiscal [removed: 2024,] [added: 2025,] we completed approximately [removed: $2.0] [added: $1.8] billion of long-term debt and equity financing.

Rewritten

As of September 30, [removed: 2024,] [added: 2025,] our equity capitalization was [removed: 61.0] [added: 60.3] percent.

Rewritten

As of September 30, [removed: 2024,] [added: 2025,] we had approximately [removed: $4.8] [added: $4.9] billion in total liquidity, consisting of [removed: $307.3] [added: $202.7] million in cash and cash equivalents, [removed: $1,380.6] [added: $1,558.5] million in funds available through equity forward sales agreements, and $3,094.4 million in undrawn capacity under our credit facilities.

Rewritten

During fiscal [removed: 2024,] [added: 2025,] we completed regulatory proceedings in our distribution segment resulting in a [removed: $266.8] [added: $256.4] million increase in annual operating income.

Rewritten

Excluding the impact of the refund of excess deferred income taxes resulting from previously enacted tax reform legislation, our total fiscal [removed: 2024] [added: 2025] annualized rate outcomes in our distribution segment were [removed: $234.5] [added: $245.6] million.

Rewritten

Financial and operational highlights for our distribution segment for the fiscal years ended September 30, [added: 2025,] 2024, [removed: 2023,] and [removed: 2022] [added: 2023] are presented below.

Rewritten

| | | | [removed: 2024] [added: 2025] | | | | | | [removed: 2023] [added: 2024] | | | | | | [removed: 2022] [added: 2023] | | | | | | [removed: 2024] [added: 2025] vs. [removed: 2023] [added: 2024] | | | | | | [removed: 2023] [added: 2024] vs. [removed: 2022] [added: 2023] | | |

Rewritten

| Operating revenues | | | $ | [removed: 3,915,141] [added: 4,425,397] | | | | | $ | [removed: 4,099,690] [added: 3,915,141] | | | | | $ | [removed: 4,035,194] [added: 4,099,690] | | | | | $ | [removed: (184,549)] [added: 510,256] | | | | | $ | [removed: 64,496] [added: (184,549)] | |

Rewritten

| Purchased gas cost | | | [removed: 1,620,515] [added: 1,854,323] | | | | | | [removed: 2,061,920] [added: 1,620,515] | | | | | | [removed: 2,210,302] [added: 2,061,920] | | | | | | [removed: (441,405)] [added: 233,808] | | | | | | [removed: (148,382)] [added: (441,405)] | | |

Rewritten

| Operating expenses | | | [removed: 1,440,192] [added: 1,607,684] | | | | | | [removed: 1,345,144] [added: 1,440,192] | | | | | | [removed: 1,220,347] [added: 1,345,144] | | | | | | [removed: 95,048] [added: 167,492] | | | | | | [removed: 124,797] [added: 95,048] | | |

Rewritten

| Operating income | | | [removed: 854,434] [added: 963,390] | | | | | | [removed: 692,626] [added: 854,434] | | | | | | [removed: 604,545] [added: 692,626] | | | | | | [removed: 161,808] [added: 108,956] | | | | | | [removed: 88,081] [added: 161,808] | | |

Rewritten

| Other non-operating income | | | [removed: 30,106] [added: 33,578] | | | | | | [removed: 24,988] [added: 30,106] | | | | | | [removed: 6,946] [added: 24,988] | | | | | | [removed: 5,118] [added: 3,472] | | | | | | [removed: 18,042] [added: 5,118] | | |

Rewritten

| Interest charges | | | [removed: 117,086] [added: 99,226] | | | | | | [removed: 77,185] [added: 117,086] | | | | | | [removed: 49,921] [added: 77,185] | | | | | | [removed: 39,901] [added: (17,860)] | | | | | | [removed: 27,264] [added: 39,901] | | |

Rewritten

| Income before income taxes | | | [removed: 767,454] [added: 897,742] | | | | | | [removed: 640,429] [added: 767,454] | | | | | | [removed: 561,570] [added: 640,429] | | | | | | [removed: 127,025] [added: 130,288] | | | | | | [removed: 78,859] [added: 127,025] | | |

Rewritten

| Income tax expense | | | [removed: 96,041] [added: 150,961] | | | | | | [removed: 60,032] [added: 96,041] | | | | | | [removed: 39,593] [added: 60,032] | | | | | | [removed: 36,009] [added: 54,920] | | | | | | [removed: 20,439] [added: 36,009] | | |

Rewritten

| Net income | | | $ | [removed: 671,413] [added: 746,781] | | | | | $ | [removed: 580,397] [added: 671,413] | | | | | $ | [removed: 521,977] [added: 580,397] | | | | | $ | [removed: 91,016] [added: 75,368] | | | | | $ | [removed: 58,420] [added: 91,016] | |

Rewritten

| Consolidated distribution sales volumes — MMcf | | | [removed: 283,977] [added: 289,065] | | | | | | [removed: 289,948] [added: 283,977] | | | | | | [removed: 292,266] [added: 289,948] | | | | | | [removed: (5,971)] [added: 5,088] | | | | | | [removed: (2,318)] [added: (5,971)] | | |

Rewritten

| Consolidated distribution transportation volumes — MMcf | | | [removed: 156,389] [added: 156,859] | | | | | | [removed: 152,963] [added: 156,389] | | | | | | [removed: 152,709] [added: 152,963] | | | | | | [removed: 3,426] [added: 470] | | | | | | [removed: 254] [added: 3,426] | | |

Rewritten

| Total consolidated distribution throughput — MMcf | | | [removed: 440,366] [added: 445,924] | | | | | | [removed: 442,911] [added: 440,366] | | | | | | [removed: 444,975] [added: 442,911] | | | | | | [removed: (2,545)] [added: 5,558] | | | | | | [removed: (2,064)] [added: (2,545)] | | |

Rewritten

| Consolidated distribution average cost of gas per Mcf sold | | | $ | [removed: 5.71] [added: 6.41] | | | | | $ | [removed: 7.11] [added: 5.71] | | | | | $ | [removed: 7.56] [added: 7.11] | | | | | $ | [removed: (1.40)] [added: 0.70] | | | | | $ | [removed: (0.45)] [added: (1.40)] | |

Rewritten

Fiscal year ended September 30, [removed: 2024] [added: 2025] compared with fiscal year ended September 30, [removed: 2023][added: 2024]

Rewritten

Operating income for our distribution segment increased [removed: 23.4] [added: 12.8] percent.

New in FY2025

We anticipate making significant capital expenditures for the foreseeable future to modernize our distribution and transmission system, to comply with the safety rules and regulations issued by the regulatory authorities responsible for the service areas in which we operate, and to prepare to serve the growing needs of the communities we serve.

New in FY2025

Between fiscal years 2026 and 2030, we anticipate spending approximately $26 billion, with more than 80 percent dedicated to safety and reliability spending.

New in FY2025

The magnitude and allocation of these expenditures may be affected by factors such as new policy and regulations, population growth, and increased labor and materials costs.

New in FY2025

Although we believe these costs are ultimately recoverable through our rates based on the regulatory frameworks currently available to us, full recovery is not assured.

New in FY2025

Additionally, our fiscal 2025 results were

New in FY2025

favorably impacted by $26.2 million as a result of Texas legislation that became effective during the third quarter of fiscal 2025 related to infrastructure spending.

New in FY2025

- an $18.6 million increase in system monitoring, line locating, and other compliance-related activities.

New in FY2025

Additionally, our distribution segment's fiscal 2025 results were favorably impacted by $18.5 million as a result of Texas legislation that became effective during the third quarter of fiscal 2025 related to infrastructure spending.

New in FY2025

| | | | 2025 | | | | | | 2024 | | | | | | 2023 | | | | | | 2025 vs. 2024 | | | | | | 2024 vs. 2023 | | |

New in FY2025

| | | | 2025 | | | | | | 2024 | | | | | | 2023 | | | | | | 2025 vs. 2024 | | | | | | 2024 vs. 2023 | | |

New in FY2025

Fiscal year ended September 30, 2025 compared with fiscal year ended September 30, 2024

New in FY2025

- a $7.7 million increase in APT's through-system activities.

New in FY2025

- a $9.1 million decrease in refunds of excess deferred taxes to customers, which is substantially offset in income tax expense.

New in FY2025

- an $18.9 million increase in expenses recognized as a result of the System Safety and Integrity Rider filing approved in November 2024, which is offset in operating revenues.

New in FY2025

Other non-operating income increased $15.2 million primarily due to higher AFUDC largely as a result of increased capital spending.

New in FY2025

| | | | 2025 | | | | | | | | | | | | 2024 | | | | | | | | |

New in FY2025

| | | | 2025 | | | | | | 2024 | | | | | | 2023 | | | | | | 2025 vs. 2024 | | | | | | 2024 vs. 2023 | | |

New in FY2025

We completed a public offering of $650 million of 5.00% senior notes due December 2054, and received net proceeds from the offering, after the underwriting discount and offering expenses, of $639.4 million.

New in FY2025

| Securitized long-term debt | | | 77,003 | | | | | | 8,767 | | | | | | 18,647 | | | | | | 20,645 | | | | | | 28,944 | | |

New in FY2025

| Interest charges (2) | | | 7,867,907 | | | | | | 418,219 | | | | | | 827,500 | | | | | | 779,125 | | | | | | 5,843,063 | | |

New in FY2025

| Interest charges on securitized long-term debt | | | 16,841 | | | | | | 3,860 | | | | | | 6,343 | | | | | | 4,345 | | | | | | 2,293 | | |

New in FY2025

| Finance leases (3) | | | 63,067 | | | | | | 3,502 | | | | | | 7,203 | | | | | | 7,485 | | | | | | 44,877 | | |

New in FY2025

| Operating leases (4) | | | 375,802 | | | | | | 56,546 | | | | | | 99,453 | | | | | | 75,059 | | | | | | 144,744 | | |

New in FY2025

| Financial instrument obligations (5) | | | 6,485 | | | | | | 6,339 | | | | | | 146 | | | | | | — | | | | | | — | | |

New in FY2025

| Pension and postretirement benefit plan contributions (6) | | | 286,856 | | | | | | 30,175 | | | | | | 75,661 | | | | | | 45,773 | | | | | | 135,247 | | |

New in FY2025

| Total contractual obligations | | | $ | 17,689,293 | | | | | $ | 537,408 | | | | | $ | 1,745,285 | | | | | $ | 1,432,432 | | | | | $ | 13,974,168 | |

New in FY2025

| Prices actively quoted | | | $ | (1,036) | | | | | $ | 4,448 | | | | | $ | — | | | | | $ | — | | | | | $ | 3,412 | |

New in FY2025

| Total Fair Value | | | $ | (1,036) | | | | | $ | 4,448 | | | | | $ | — | | | | | $ | — | | | | | $ | 3,412 | |

Dropped from FY2024

- a $2.7 million increase in property taxes, which is inclusive of a $15.7 million decrease related to the Texas property tax legislation discussed above.

Dropped from FY2024

- a $26.9 million increase in other operation and maintenance expense, including higher costs associated with software maintenance, compliance activities, training, and other administrative costs.

Dropped from FY2024

Interest charges increased $39.9 million primarily due to the issuance of long-term debt during fiscal 2024.

Dropped from FY2024

The increase in interest charges is also due to the amortization of the Texas regulatory asset that is discussed in Note 3 to the consolidated financial statements.

Dropped from FY2024

However, this increase is offset by a corresponding increase in revenue resulting in no impact to net income.

Dropped from FY2024

Additionally, GRIP requires a utility to file a statement of intent at least once every five years to review its costs and expenses, including capital costs filed for recovery under GRIP.

Dropped from FY2024

On May 19, 2023, APT filed its statement of intent seeking $107.4 million in additional annual operating income.

Dropped from FY2024

On December 13, 2023, the RRC approved the settlement agreement between APT and the intervening parties for an increase in annual operating income of $27.0 million, exclusive of the impact of the cessation of $36.9 million in excess deferred income tax refunds, which are substantially offset by a corresponding increase in income taxes.

Dropped from FY2024

New rates were implemented effective December 13, 2023.

Dropped from FY2024

- a $39.0 million net increase in APT's through-system activities primarily associated with increased spreads.

Dropped from FY2024

- a $3.1 million decrease in property taxes, which is inclusive of a $5.4 million decrease related to the Texas property tax legislation discussed above.

Dropped from FY2024

- an $18.1 million increase in operation and maintenance expense due to increased storage and compression maintenance and other compliance-related activities.

Dropped from FY2024

Interest charges increased $13.5 million primarily due to the issuance of long-term debt during fiscal 2024.

Dropped from FY2024

In the first half of fiscal 2025, we anticipate filing a new $8.0 billion shelf registration statement and a prospectus supplement under this new shelf registration statement for a new $1.7 billion ATM equity sales program to replace the former arrangements.

Dropped from FY2024

As of September 30, 2024, we had the following forward starting interest rate swaps in place to hedge future planned debt issuances:

Dropped from FY2024

| | | | | | | | | | | | | | | |

Dropped from FY2024

| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |

Dropped from FY2024

| Planned Debt Issuance Date | | | | | | Amount Hedged | | | | | | Effective Interest Rate | | |

Dropped from FY2024

| | | | | | | (In thousands) | | | | | | | | |

Dropped from FY2024

| Fiscal 2026 | | | | | | $ | 300,000 | | | | | 2.16 | | % |

Dropped from FY2024

| | | | | | | $ | 300,000 | | | | | | | |

Dropped from FY2024

Fiscal 2023 operating cash flow included $2,021.9 million of cash received as a result of the conclusion of Texas securitization proceedings.

Dropped from FY2024

outstanding.

Dropped from FY2024

Finally, Atmos Energy Kansas Securitization I, LLC, a special-purpose, wholly-owned subsidiary of Atmos Energy, issued $95 million in securitized long-term debt.

Dropped from FY2024

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

Dropped from FY2024

| Securitized long-term debt | | | 85,078 | | | | | | 8,207 | | | | | | 17,721 | | | | | | 19,621 | | | | | | 39,529 | | |

Dropped from FY2024

| Interest charges (2) | | | 5,854,623 | | | | | | 318,117 | | | | | | 635,037 | | | | | | 592,054 | | | | | | 4,309,415 | | |

Dropped from FY2024

| Interest charges on securitized long-term debt | | | 21,071 | | | | | | 4,281 | | | | | | 7,255 | | | | | | 5,356 | | | | | | 4,179 | | |

Dropped from FY2024

| Finance leases (3) | | | 66,506 | | | | | | 3,438 | | | | | | 7,070 | | | | | | 7,338 | | | | | | 48,660 | | |

Dropped from FY2024

| Operating leases (4) | | | 320,408 | | | | | | 43,244 | | | | | | 73,917 | | | | | | 56,419 | | | | | | 146,828 | | |

Dropped from FY2024

| Financial instrument obligations (5) | | | 7,637 | | | | | | 7,324 | | | | | | 313 | | | | | | — | | | | | | — | | |

Dropped from FY2024

| Pension and postretirement benefit plan contributions (6) | | | 273,428 | | | | | | 27,596 | | | | | | 51,411 | | | | | | 65,310 | | | | | | 129,111 | | |

Dropped from FY2024

| Total contractual obligations | | | $ | 14,471,548 | | | | | $ | 412,207 | | | | | $ | 1,360,521 | | | | | $ | 1,396,098 | | | | | $ | 11,302,722 | |

Dropped from FY2024

| Prices actively quoted | | | $ | (5,233) | | | | | $ | 93,884 | | | | | $ | — | | | | | $ | — | | | | | $ | 88,651 | |

Dropped from FY2024

| Total Fair Value | | | $ | (5,233) | | | | | $ | 93,884 | | | | | $ | — | | | | | $ | — | | | | | $ | 88,651 | |

An excerpt. Shown here: 40 of 140 rewritten, all 28 added and all 35 removed. The counts are complete. For every sentence, read Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations. in the FY2025 filing and the FY2024 filing.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

1 rewritten, 0 added, 0 removed, 18 unchanged

Rewritten

Had interest rates associated with our short-term borrowings increased by an average of one percent, our interest expense would not have materially increased during [removed: 2024.][added: 2025.]

Item 1. Business.

59 rewritten, 69 added, 71 removed, 280 unchanged

Rewritten

Atmos Energy Corporation, [added: a natural gas-only distributor, is an S&P 500 company] headquartered in [removed: Dallas, Texas,] [added: Dallas] and incorporated in Texas and [removed: Virginia, is the country’s largest natural-gas-only distributor based on number of customers.][added: Virginia.]

Rewritten

We safely deliver reliable, efficient, and abundant natural gas through regulated sales and transportation arrangements to [removed: over 3.3] [added: approximately 3.4] million residential, commercial, public authority, and industrial customers in eight states located primarily in the South.

Rewritten

| Mid-Tex | | | | | | Texas, including the Dallas/Fort Worth Metroplex | | | | | | 550 | | | | | | [removed: 1,804,265] [added: 1,830,387] | | |

Rewritten

| Kentucky/Mid-States | | | | | | Kentucky | | | | | | 220 | | | | | | [removed: 176,903] [added: 176,494] | | |

Rewritten

| Louisiana | | | | | | Louisiana | | | | | | 270 | | | | | | [removed: 360,870] [added: 360,589] | | |

Rewritten

| West Texas | | | | | | Amarillo, Lubbock, Midland | | | | | | 80 | | | | | | [removed: 314,503] [added: 316,036] | | |

Rewritten

| Colorado-Kansas | | | | | | Colorado | | | | | | 170 | | | | | | [removed: 129,727] [added: 130,890] | | |

Rewritten

At September 30, [removed: 2024,] [added: 2025,] we held [removed: 1,026] [added: 1,010] franchises having terms generally ranging from five to 35 years.

Rewritten

Major suppliers during fiscal [removed: 2024] [added: 2025] were [added: ARM Energy Management LLC,] Cima Energy, LP, ConocoPhillips Company, [added: ECO Energy Natural Gas LLC,] EnLink Gas Marketing LP, [removed: Enterprise Navitas Midstream Midland Basin LLC, Hartree Partners, L.P.,] Sequent Energy Management LLC, Symmetry Energy Solutions, LLC, Targa Gas Marketing LLC, Tenaska Marking Ventures, and Texla Energy Management, Inc.

Rewritten

We estimate our peak-day availability of natural gas supply to be approximately [removed: 5.3] [added: 5.4] Bcf.

Rewritten

The peak-day demand for our distribution operations in fiscal [removed: 2024] [added: 2025] was on [removed: January 15, 2024,] [added: February 19, 2025,] when sales to customers reached approximately [removed: 4.3] [added: 4.2] Bcf.

Rewritten

Currently, our distribution divisions utilize [removed: 34] [added: 33] pipeline transportation companies, both interstate and intrastate, to transport our natural gas.

Rewritten

As a result of our ratemaking efforts [added: and legislative actions] in [added: our jurisdictions in] recent years, Atmos Energy has:

Rewritten

Through our annual formula rate mechanisms and infrastructure programs, we have the ability to begin recovering approximately [removed: 90] [added: 95] percent of our capital expenditures within six months and substantially all of our capital expenditures within twelve months.

Rewritten

- Authorization in tariffs, statute or commission rules that allows us to defer certain elements of our [added: incurred] cost of service such as depreciation, ad valorem taxes, pension costs, and certain safety related expenses, until they are included in rates.

Rewritten

The following tables provides a jurisdictional rate summary for our regulated operations as of September 30, [removed: 2024.][added: 2025.]

Rewritten

| Atmos Pipeline — Texas | | | | | | Texas | | | | | | [removed: 05/14/2024] [added: 06/17/2025] | | | | | | [removed: $4,773,699] [added: $5,237,614] | | | | | | 8.49% | | | | | | 40/60 | | | 11.45% | | |

Rewritten

| | | | | | | Colorado SSIR | | | | | | [removed: 01/01/2024] [added: 01/01/2025] | | | | | | [removed: 52,820] [added: 73,623] | | | | | | 7.00% / 3.97% | | | | | | 42/58 | | | (4) | | |

Rewritten

| [added: Colorado-Kansas] | | | | | | Kansas SIP | | | | | | [removed: 04/01/2024] [added: 12/2024] | | | | | | [removed: 19,908] [added: 612] | | | | | | [removed: (4)] [added: —] | | | | | | [removed: (4)] [added: 612] | | | [removed: (4)] | | | [added: 04/01/2025 | | |]

Rewritten

| | | | | | | Kentucky-PRP | | | | | | [removed: 10/01/2023] [added: 05/29/2025] | | | | | | [removed: 40,504] [added: 67,464] | | | | | | 6.94% | | | | | | 45/55 | | | 9.45% | | |

Rewritten

| [added: Mid-Tex] | | | | | | Mid-Tex [removed: ATM Cities] [added: Cities(5)] | | | | | | [removed: 06/07/2024] [added: 10/01/2024] | | | | | | [removed: 7,009,146(6)] [added: 7,146,843(6)] | | | | | | [removed: 7.97%] [added: 7.41%] | | | | | | [removed: 40/60] [added: 42/58] | | | 9.80% | | |

Rewritten

| West Texas | | | | | | Texas | | | | | | Yes | | | | | | [removed: Yes] [added: No] | | | | | | Yes | | | No | | | | | | October-May | | |

Rewritten

(5)The Mid-Tex Cities approved the Formula Rate Mechanism filing with rates effective October 1, [removed: 2024,] [added: 2025,] which included a rate base of [removed: $7.1] [added: $8.3] billion, an authorized return of [removed: 7.41%,] [added: 7.42%,] a debt/equity ratio of [removed: 42/58] [added: 42/58,] and an authorized ROE of 9.80%.

Rewritten

[removed: No] [added: The final order included an authorized return of 6.80%, a] debt/equity ratio [removed: or] [added: of 50/50, and] an authorized ROE [removed: was included in the commissions final order.][added: of 9.40%.]

Rewritten

[removed: (8)The West Texas Cities includes all] [added: |] West Texas [removed: Division cities except] [added: | | | | | |] Amarillo, Lubbock, Dalhart and Channing [removed: (ALDC).][added: | | | | | | 12/2023 | | | | | | 6,938 | | | | | | — | | | | | | 6,938 | | | | | | 06/09/2023 | | |]

Rewritten

| [added: *2025] Rate [removed: case filings] [added: Case Filings:*] | | | | | | [removed: 5,938] | | | | | | [removed: 7,379] | | | | | | [removed: 13,317] | | | [added: | | | | | | | | | | | |]

Rewritten

| Other ratemaking activity | | | | | | [removed: (370)] [added: 111] | | | | | | — | | | | | | [removed: (370)] [added: 111] | | |

Rewritten

The following ratemaking efforts seeking [removed: $218.0] [added: $231.1] million in annual operating income were initiated during fiscal [removed: 2024] [added: 2025] but had not been completed or implemented as of September 30, [removed: 2024:][added: 2025:]

Rewritten

| Colorado-Kansas | | | | | | Infrastructure Mechanism | | | | | | Kansas (1) | | | | | | [removed: $] [added: 1,949] | [removed: 1,998] | |

Rewritten

| Kentucky/Mid-States | | | | | | Infrastructure Mechanism | | | | | | Virginia (2) | | | | | | [removed: 748] [added: 550] | | |

Rewritten

| Kentucky/Mid-States | | | | | | Infrastructure Mechanism | | | | | | Kentucky (3) | | | | | | [removed: 3,441] [added: 7,246] | | |

Rewritten

| Mid-Tex | | | | | | Formula Rate Mechanism | | | | | | Mid-Tex Cities (4) | | | | | | [removed: 133,414] [added: 165,027] | | |

Rewritten

(1) The staff of the Kansas Corporation Commission recommended approval of the GSRS filing on October 17, [removed: 2024,] [added: 2025,] subject to commission approval.

Rewritten

(2) On [removed: September 4, 2024,] [added: August 22, 2025,] the State Corporation Commission of Virginia approved a rate increase of [removed: $0.7] [added: $0.5] million effective October 1, [removed: 2024.][added: 2025.]

Rewritten

(3) On September [removed: 27, 2024,] [added: 15, 2025,] the Kentucky Public Service Commission approved a rate increase of [removed: $3.4] [added: $7.2] million effective October 2, [removed: 2024,] [added: 2025,] subject to refund.

Rewritten

(4) The Mid-Tex Cities approved a rate increase of [removed: $112.1] [added: $138.5] million.

Rewritten

New rates were implemented October 1, [removed: 2024.][added: 2025.]

Rewritten

| Texas | | | | | | Gas Reliability Infrastructure Program (GRIP), (1) | | | | | | Dallas Annual Rate Review (DARR), [added: Mid-Tex] Rate Review Mechanism (RRM) | | |

Rewritten

(1) Infrastructure mechanisms in Texas, Louisiana, and Tennessee allow for the deferral of all expenses associated with capital expenditures incurred pursuant to these rules, which primarily consists of interest, depreciation, and other taxes (Texas [added: and Tennessee] only), until the next rate proceeding (rate case or annual rate filing), at which time investment and costs would be recoverable through base rates.

Rewritten

The following table summarizes our annual formula rate mechanisms with effective dates during the fiscal years ended September 30, [added: 2025,] 2024, [removed: 2023,] and [removed: 2022:][added: 2023:]

New in FY2025

| | | | | | | Tennessee | | | | | | | | | | | | 163,667 | | |

New in FY2025

| | | | | | | Virginia | | | | | | | | | | | | 23,836 | | |

New in FY2025

| Mississippi | | | | | | Mississippi | | | | | | 110 | | | | | | 249,562 | | |

New in FY2025

| | | | | | | Kansas | | | | | | | | | | | | 140,542 | | |

New in FY2025

| | | | | | | Kansas GSRS | | | | | | 12/17/2024 | | | | | | 38,932 | | | | | | (4) | | | | | | (4) | | | (4) | | |

New in FY2025

| | | | | | | Kansas SIP | | | | | | 04/01/2025 | | | | | | 25,707 | | | | | | (4) | | | | | | (4) | | | (4) | | |

New in FY2025

| Kentucky/Mid-States | | | | | | Kentucky | | | | | | 05/12/2025 | | | | | | 611,038 | | | | | | 7.15% | | | | | | 46/54 | | | 9.75% | | |

New in FY2025

| | | | | | | Tennessee | | | | | | 06/01/2025 | | | | | | 611,649 | | | | | | 7.63% | | | | | | 39/61 | | | 9.80% | | |

New in FY2025

| | | | | | | Virginia-SAVE | | | | | | 10/01/2024 | | | | | | 21,436 | | | | | | 7.57% | | | | | | 39/61 | | | 9.90% | | |

New in FY2025

| Louisiana | | | | | | Louisiana | | | | | | 07/01/2025 | | | | | | 1,352,758 | | | | | | 7.42% | | | | | | 42/58 | | | 9.80% | | |

New in FY2025

| | | | | | | Mid-Tex ATM Cities | | | | | | 08/01/2025 | | | | | | 7,953,622(6) | | | | | | 7.59% | | | | | | 39/61 | | | 9.80% | | |

New in FY2025

| | | | | | | Mid-Tex Environs | | | | | | 08/01/2025 | | | | | | 7,953,529(6) | | | | | | 7.59% | | | | | | 39/61 | | | 9.80% | | |

New in FY2025

| | | | | | | Mid-Tex — Dallas | | | | | | 06/01/2025 | | | | | | 7,973,771(6) | | | | | | 7.52% | | | | | | 40/60 | | | 9.80% | | |

New in FY2025

| Mississippi | | | | | | Mississippi(7) | | | | | | 11/04/2024 | | | | | | 592,236 | | | | | | 7.80% | | | | | | (4) | | | (4) | | |

New in FY2025

| | | | | | | Mississippi - SIR(7) | | | | | | 11/04/2024 | | | | | | 629,687 | | | | | | 7.80% | | | | | | (4) | | | (4) | | |

New in FY2025

| West Texas | | | | | | West Texas Systemwide (8) | | | | | | 06/01/2025 | | | | | | 1,231,651 | | | | | | 7.59% | | | | | | 39/61 | | | 9.80% | | |

New in FY2025

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

New in FY2025

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

New in FY2025

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

New in FY2025

(7)The Mississippi SRF and SIR were filed jointly in a general rate case.

New in FY2025

On November 4, 2025, the Mississippi Public Service Commission issued a rate order in this case.

New in FY2025

We are required to file tariffs consistent with the final order by November 18, 2025, which we expect will determine the final impact to operating income and rate base.

New in FY2025

We expect rates to be implemented during the first quarter of fiscal 2026.

New in FY2025

(8)The West Texas Systemwide Statement of Intent filing included the West Texas RRM and the Amarillo, Lubbock, Dalhart and Channing (ALDC), Environs, and Triangle GRIP filings.

New in FY2025

| *2025 Filings:* | | | | | | | | | | | | | | | | | | | | |

New in FY2025

| Annual formula rate mechanisms | | | | | | $ | 279,724 | | | | | $ | 2,255 | | | | | $ | 281,979 | |

New in FY2025

| Total 2025 Filings | | | | | | $ | 333,567 | | | | | $ | (10,721) | | | | | $ | 322,846 | |

New in FY2025

| Colorado-Kansas | | | | | | Rate Case | | | | | | Kansas | | | | | | $ | 15,977 | |

New in FY2025

| Mississippi | | | | | | Rate Case | | | | | | Mississippi (5) | | | | | | 40,301 | | |

New in FY2025

| | | | | | | | | | | | | | | | | | | | | |

New in FY2025

| | | | | | | | | | | | | | | | | | | | | |

New in FY2025

| | | | | | | | | | | | | | | | | | | $ | 231,050 | |

New in FY2025

(5) On November 4, 2025, the Mississippi Public Service Commission issued a rate order in this case.

New in FY2025

We are required to file tariffs consistent with the final order by November 18, 2025, which we expect will determine the final impact to operating income and rate base.

New in FY2025

We expect rates to be implemented during the first quarter of fiscal 2026.

New in FY2025

| *2025 Filings:* | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

New in FY2025

| Louisiana | | | | | | Louisiana | | | | | | 12/2024 | | | | | | $ | 22,304 | | | | | $ | 1,473 | | | | | $ | 23,777 | | | | | 07/01/2025 | | |

New in FY2025

| Atmos Pipeline - Texas | | | | | | Texas | | | | | | 12/2024 | | | | | | 77,206 | | | | | | — | | | | | | 77,206 | | | | | | 06/17/2025 | | |

New in FY2025

| Mid-Tex | | | | | | DARR | | | | | | 09/2024 | | | | | | 25,916 | | | | | | — | | | | | | 25,916 | | | | | | 06/01/2025 | | |

New in FY2025

| Kentucky/Mid-States | | | | | | Kentucky PRP (1) | | | | | | 09/2025 | | | | | | 3,248 | | | | | | — | | | | | | 3,248 | | | | | | 05/29/2025 | | |

Dropped from FY2024

| | | | | | | Tennessee | | | | | | | | | | | | 161,193 | | |

Dropped from FY2024

| | | | | | | Virginia | | | | | | | | | | | | 23,777 | | |

Dropped from FY2024

| Mississippi | | | | | | Mississippi | | | | | | 110 | | | | | | 251,147 | | |

Dropped from FY2024

| | | | | | | Kansas | | | | | | | | | | | | 139,435 | | |

Dropped from FY2024

| | | | | | | Kansas GSRS | | | | | | 11/02/2023 | | | | | | 16,546 | | | | | | (4) | | | | | | (4) | | | (4) | | |

Dropped from FY2024

| Kentucky/Mid-States | | | | | | Kentucky | | | | | | 05/20/2022 | | | | | | 568,506 | | | | | | 6.82% | | | | | | 45/55 | | | 9.23% | | |

Dropped from FY2024

| | | | | | | Tennessee | | | | | | 06/01/2024 | | | | | | 554,053 | | | | | | 7.64% | | | | | | 38/62 | | | 9.80% | | |

Dropped from FY2024

| | | | | | | Virginia-SAVE | | | | | | 10/01/2023 | | | | | | 16,422 | | | | | | 7.43% | | | | | | 42/58 | | | 9.20% | | |

Dropped from FY2024

| Louisiana | | | | | | Louisiana | | | | | | 07/01/2024 | | | | | | 1,227,842 | | | | | | 7.43% | | | | | | 42/58 | | | 9.80% | | |

Dropped from FY2024

| Mid-Tex | | | | | | Mid-Tex Cities(5) | | | | | | 10/01/2023 | | | | | | 6,070,321(6) | | | | | | 7.35% | | | | | | 42/58 | | | 9.80% | | |

Dropped from FY2024

| | | | | | | Mid-Tex Environs | | | | | | 06/01/2024 | | | | | | 7,009,154(6) | | | | | | 7.97% | | | | | | 40/60 | | | 9.80% | | |

Dropped from FY2024

| | | | | | | Mid-Tex — Dallas | | | | | | 06/01/2024 | | | | | | 6,844,772(6) | | | | | | 7.47% | | | | | | 40/60 | | | 9.80% | | |

Dropped from FY2024

| Mississippi | | | | | | Mississippi(7) | | | | | | 12/01/2023 | | | | | | 591,882 | | | | | | 7.82% | | | | | | 39/61 | | | 10.34% | | |

Dropped from FY2024

| | | | | | | Mississippi - SIR(7) | | | | | | 12/01/2023 | | | | | | 472,676 | | | | | | 7.82% | | | | | | 39/61 | | | 10.34% | | |

Dropped from FY2024

| West Texas | | | | | | West Texas Cities(8) (10) | | | | | | 10/01/2023 | | | | | | 965,289(9) | | | | | | 7.35% | | | | | | 42/58 | | | 9.80% | | |

Dropped from FY2024

| | | | | | | West Texas - ALDC | | | | | | 06/07/2024 | | | | | | 1,062,054(9) | | | | | | 7.35% | | | | | | 41/59 | | | (4) | | |

Dropped from FY2024

| | | | | | | West Texas - Environs | | | | | | 06/01/2024 | | | | | | 1,059,604(9) | | | | | | 7.97% | | | | | | 40/60 | | | 9.80% | | |

Dropped from FY2024

| | | | | | | West Texas - Triangle | | | | | | 06/01/2024 | | | | | | 65,124 | | | | | | 7.71% | | | | | | 40/60 | | | 9.80% | | |

Dropped from FY2024

(7)The Mississippi Public Service Commission approved a settlement at its meeting on November 4, 2024, which included a rate base of $1.2 billion and an authorized return of 7.80%.

Dropped from FY2024

(9)The West Texas rate base represents a "system-wide," or 100 percent, of the West Texas Division's rate base.

Dropped from FY2024

(10)The West Texas Cities approved the Formula Rate Mechanism filing with rates effective October 1, 2024, which included a rate base of $1.1 billion, an authorized return of 7.41%, a debt/equity ratio of 42/58 and an authorized ROE of 9.80%.

Dropped from FY2024

| *2022 Filings:* | | | | | | | | | | | | | | | | | | | | |

Dropped from FY2024

| Annual formula rate mechanisms | | | | | | $ | 169,354 | | | | | $ | 33,249 | | | | | $ | 202,603 | |

Dropped from FY2024

| Total 2022 Filings | | | | | | $ | 174,922 | | | | | $ | 40,628 | | | | | $ | 215,550 | |

Dropped from FY2024

| Kentucky/Mid-States | | | | | | Rate Case | | | | | | Kentucky | | | | | | 33,654 | | |

Dropped from FY2024

| Mississippi | | | | | | Infrastructure Mechanism | | | | | | Mississippi (5) | | | | | | 21,830 | | |

Dropped from FY2024

| Mississippi | | | | | | Formula Rate Mechanism | | | | | | Mississippi (5) | | | | | | 16,244 | | |

Dropped from FY2024

| West Texas | | | | | | Formula Rate Mechanism | | | | | | West Texas Cities (6) | | | | | | 6,709 | | |

Dropped from FY2024

| | | | | | | | | | | | | | | | | | | $ | 218,038 | |

Dropped from FY2024

(5) On November 4, 2024, the Mississippi Public Service Commission (MPSC) approved an increase in operating income of $24.0 million for the SIR filing and an increase in operating income of $3.8 million for the SRF filing.

Dropped from FY2024

(6) The West Texas Cities approved a rate increase of $4.4 million.

Dropped from FY2024

New rates were implemented on October 1, 2024.

Dropped from FY2024

| West Texas | | | | | | Amarillo, Lubbock, Dalhart and Channing | | | | | | 12/2022 | | | | | | 6,938 | | | | | | — | | | | | | 6,938 | | | | | | 06/09/2023 | | |

Dropped from FY2024

| *2022 Filings:* | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

Dropped from FY2024

| Louisiana | | | | | | Louisiana | | | | | | 12/2021 | | | | | | 17,650 | | | | | | (10,389) | | | | | | 7,261 | | | | | | 07/01/2022 | | |

Dropped from FY2024

| West Texas | | | | | | Amarillo, Lubbock, Dalhart and Channing | | | | | | 12/2021 | | | | | | 6,122 | | | | | | — | | | | | | 6,122 | | | | | | 06/11/2022 | | |

Dropped from FY2024

| West Texas | | | | | | Triangle | | | | | | 12/2021 | | | | | | 1,549 | | | | | | — | | | | | | 1,549 | | | | | | 06/11/2022 | | |

Dropped from FY2024

| West Texas | | | | | | Environs | | | | | | 12/2021 | | | | | | 1,221 | | | | | | — | | | | | | 1,221 | | | | | | 06/11/2022 | | |

Dropped from FY2024

| Mid-Tex | | | | | | ATM Cities | | | | | | 12/2021 | | | | | | 12,815 | | | | | | — | | | | | | 12,815 | | | | | | 06/10/2022 | | |

Dropped from FY2024

| Mid-Tex | | | | | | Environs | | | | | | 12/2021 | | | | | | 5,646 | | | | | | — | | | | | | 5,646 | | | | | | 06/10/2022 | | |

An excerpt. Shown here: 40 of 59 rewritten, 40 of 69 added and 40 of 71 removed. The counts are complete. For every sentence, read Item 1. Business. in the FY2025 filing and the FY2024 filing.

Cover and table of contents

28 rewritten, 0 added, 0 removed, 114 unchanged

Rewritten

For the fiscal year ended September 30, [removed: 2024][added: 2025]

Rewritten

The aggregate market value of the common voting stock held by non-affiliates of the registrant as of the last business day of the registrant’s most recently completed second fiscal quarter, March 31, [removed: 2024,] [added: 2025,] was [removed: $17,825,800,856.][added: $24,413,133,216.]

Rewritten

As of November [removed: 14, 2024,] [added: 10, 2025,] the registrant had [removed: 155,399,533] [added: 161,693,336] shares of common stock outstanding.

Rewritten

Portions of the registrant’s Definitive Proxy Statement to be filed for the Annual Meeting of Shareholders on February [removed: 5, 2025] [added: 4, 2026] are incorporated by reference into Part III of this report.

Rewritten

| [Glossary of Key [removed: Terms](#i81a86c7a28f2449ea243859e5528848d_10)] [added: Terms](#i9591964be34d49fd9e5cb6998100a581_10)] | | | | | | [removed: [3](#i81a86c7a28f2449ea243859e5528848d_10)] [added: [3](#i9591964be34d49fd9e5cb6998100a581_10)] | | |

Rewritten

| Item 1. | | | [removed: [Business](#i81a86c7a28f2449ea243859e5528848d_16)] [added: [Business](#i9591964be34d49fd9e5cb6998100a581_16)] | | | [removed: [4](#i81a86c7a28f2449ea243859e5528848d_16)] [added: [4](#i9591964be34d49fd9e5cb6998100a581_16)] | | |

Rewritten

| Item 1A. | | | [Risk [removed: Factors](#i81a86c7a28f2449ea243859e5528848d_19)] [added: Factors](#i9591964be34d49fd9e5cb6998100a581_19)] | | | [removed: [14](#i81a86c7a28f2449ea243859e5528848d_19)] [added: [14](#i9591964be34d49fd9e5cb6998100a581_19)] | | |

Rewritten

| Item 1B. | | | [Unresolved Staff [removed: Comments](#i81a86c7a28f2449ea243859e5528848d_22)] [added: Comments](#i9591964be34d49fd9e5cb6998100a581_22)] | | | [removed: [19](#i81a86c7a28f2449ea243859e5528848d_22)] [added: [18](#i9591964be34d49fd9e5cb6998100a581_22)] | | |

Rewritten

| Item 1C. | | | [removed: [Cybersecurity](#i81a86c7a28f2449ea243859e5528848d_1815)] [added: [Cybersecurity](#i9591964be34d49fd9e5cb6998100a581_25)] | | | [removed: [19](#i81a86c7a28f2449ea243859e5528848d_1815)] [added: [18](#i9591964be34d49fd9e5cb6998100a581_25)] | | |

Rewritten

| Item 2. | | | [removed: [Properties](#i81a86c7a28f2449ea243859e5528848d_25)] [added: [Properties](#i9591964be34d49fd9e5cb6998100a581_28)] | | | [removed: [21](#i81a86c7a28f2449ea243859e5528848d_25)] [added: [20](#i9591964be34d49fd9e5cb6998100a581_28)] | | |

Rewritten

| Item 3. | | | [Legal [removed: Proceedings](#i81a86c7a28f2449ea243859e5528848d_28)] [added: Proceedings](#i9591964be34d49fd9e5cb6998100a581_31)] | | | [removed: [22](#i81a86c7a28f2449ea243859e5528848d_28)] [added: [22](#i9591964be34d49fd9e5cb6998100a581_31)] | | |

Rewritten

| Item 4. | | | [Mine Safety [removed: Disclosures](#i81a86c7a28f2449ea243859e5528848d_31)] [added: Disclosures](#i9591964be34d49fd9e5cb6998100a581_34)] | | | [removed: [22](#i81a86c7a28f2449ea243859e5528848d_31)] [added: [22](#i9591964be34d49fd9e5cb6998100a581_34)] | | |

Rewritten

| Item 5. | | | [Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity [removed: Securities](#i81a86c7a28f2449ea243859e5528848d_37)] [added: Securities](#i9591964be34d49fd9e5cb6998100a581_40)] | | | [removed: [22](#i81a86c7a28f2449ea243859e5528848d_37)] [added: [22](#i9591964be34d49fd9e5cb6998100a581_40)] | | |

Rewritten

| Item 6. | | | [removed: [Reserved](#i81a86c7a28f2449ea243859e5528848d_40)] [added: [Reserved](#i9591964be34d49fd9e5cb6998100a581_43)] | | | [removed: [24](#i81a86c7a28f2449ea243859e5528848d_40)] [added: [24](#i9591964be34d49fd9e5cb6998100a581_43)] | | |

Rewritten

| Item 7. | | | [Management’s Discussion and Analysis of Financial Condition and Results of [removed: Operations](#i81a86c7a28f2449ea243859e5528848d_46)] [added: Operations](#i9591964be34d49fd9e5cb6998100a581_49)] | | | [removed: [24](#i81a86c7a28f2449ea243859e5528848d_46)] [added: [24](#i9591964be34d49fd9e5cb6998100a581_49)] | | |

Rewritten

| Item 7A. | | | [Quantitative and Qualitative Disclosures About Market [removed: Risk](#i81a86c7a28f2449ea243859e5528848d_82)] [added: Risk](#i9591964be34d49fd9e5cb6998100a581_85)] | | | [removed: [35](#i81a86c7a28f2449ea243859e5528848d_82)] [added: [34](#i9591964be34d49fd9e5cb6998100a581_85)] | | |

Rewritten

| Item 8. | | | [Financial Statements and Supplementary [removed: Data](#i81a86c7a28f2449ea243859e5528848d_85)] [added: Data](#i9591964be34d49fd9e5cb6998100a581_88)] | | | [removed: [36](#i81a86c7a28f2449ea243859e5528848d_85)] [added: [36](#i9591964be34d49fd9e5cb6998100a581_88)] | | |

Rewritten

| Item 9. | | | [Changes in and Disagreements With Accountants on Accounting and Financial [removed: Disclosure](#i81a86c7a28f2449ea243859e5528848d_175)] [added: Disclosure](#i9591964be34d49fd9e5cb6998100a581_175)] | | | [removed: [86](#i81a86c7a28f2449ea243859e5528848d_175)] [added: [86](#i9591964be34d49fd9e5cb6998100a581_175)] | | |

Rewritten

| Item 9A. | | | [Controls and [removed: Procedures](#i81a86c7a28f2449ea243859e5528848d_178)] [added: Procedures](#i9591964be34d49fd9e5cb6998100a581_178)] | | | [removed: [86](#i81a86c7a28f2449ea243859e5528848d_178)] [added: [86](#i9591964be34d49fd9e5cb6998100a581_178)] | | |

Rewritten

| Item 9B. | | | [Other [removed: Information](#i81a86c7a28f2449ea243859e5528848d_181)] [added: Information](#i9591964be34d49fd9e5cb6998100a581_181)] | | | [removed: [88](#i81a86c7a28f2449ea243859e5528848d_181)] [added: [88](#i9591964be34d49fd9e5cb6998100a581_181)] | | |

Rewritten

| Item 9C. | | | [Disclosure Regarding Foreign Jurisdictions that Prevent [removed: Inspections](#i81a86c7a28f2449ea243859e5528848d_184)] [added: Inspections](#i9591964be34d49fd9e5cb6998100a581_184)] | | | [removed: [88](#i81a86c7a28f2449ea243859e5528848d_184)] [added: [88](#i9591964be34d49fd9e5cb6998100a581_184)] | | |

Rewritten

| Item 10. | | | [Directors, Executive Officers and Corporate [removed: Governance](#i81a86c7a28f2449ea243859e5528848d_190)] [added: Governance](#i9591964be34d49fd9e5cb6998100a581_190)] | | | [removed: [88](#i81a86c7a28f2449ea243859e5528848d_190)] [added: [88](#i9591964be34d49fd9e5cb6998100a581_190)] | | |

Rewritten

| Item 11. | | | [Executive [removed: Compensation](#i81a86c7a28f2449ea243859e5528848d_193)] [added: Compensation](#i9591964be34d49fd9e5cb6998100a581_193)] | | | [removed: [89](#i81a86c7a28f2449ea243859e5528848d_193)] [added: [89](#i9591964be34d49fd9e5cb6998100a581_193)] | | |

Rewritten

| Item 12. | | | [Security Ownership of Certain Beneficial Owners and Management and Related Stockholder [removed: Matters](#i81a86c7a28f2449ea243859e5528848d_196)] [added: Matters](#i9591964be34d49fd9e5cb6998100a581_196)] | | | [removed: [89](#i81a86c7a28f2449ea243859e5528848d_196)] [added: [89](#i9591964be34d49fd9e5cb6998100a581_196)] | | |

Rewritten

| Item 13. | | | [Certain Relationships and Related Transactions, and Director [removed: Independence](#i81a86c7a28f2449ea243859e5528848d_199)] [added: Independence](#i9591964be34d49fd9e5cb6998100a581_199)] | | | [removed: [89](#i81a86c7a28f2449ea243859e5528848d_199)] [added: [89](#i9591964be34d49fd9e5cb6998100a581_199)] | | |

Rewritten

| Item 14. | | | [Principal Accountant Fees and [removed: Services](#i81a86c7a28f2449ea243859e5528848d_202)] [added: Services](#i9591964be34d49fd9e5cb6998100a581_202)] | | | [removed: [89](#i81a86c7a28f2449ea243859e5528848d_202)] [added: [89](#i9591964be34d49fd9e5cb6998100a581_202)] | | |

Rewritten

| Item 15. | | | [Exhibits and Financial Statement [removed: Schedules](#i81a86c7a28f2449ea243859e5528848d_208)] [added: Schedules](#i9591964be34d49fd9e5cb6998100a581_208)] | | | [removed: [89](#i81a86c7a28f2449ea243859e5528848d_208)] [added: [89](#i9591964be34d49fd9e5cb6998100a581_208)] | | |

Rewritten

| Item 16. | | | [Form 10-K [removed: Summary](#i81a86c7a28f2449ea243859e5528848d_211)] [added: Summary](#i9591964be34d49fd9e5cb6998100a581_211)] | | | [removed: [94](#i81a86c7a28f2449ea243859e5528848d_211)] [added: [95](#i9591964be34d49fd9e5cb6998100a581_211)] | | |

Item 1C. Cybersecurity.

2 rewritten, 1 added, 0 removed, 33 unchanged

Rewritten

Atmos Energy has implemented policies, procedures, and controls to identify, protect, detect, and respond to [removed: cyberattacks or acts of online terrorism.]

Rewritten

The RMCC is overseen by the Company’s Management Committee, which is comprised of the President and Chief Executive Officer, Senior Vice President and Chief Financial Officer, Senior Vice President, Utility Operations, Senior Vice President, General Counsel & Corporate [removed: Secretary and] [added: Secretary,] Senior Vice President, Human [removed: Resources.][added: Resources, and Senior Advisor.]

New in FY2025

cyberattacks or acts of online terrorism.

Item 2. Properties.

10 rewritten, 7 added, 4 removed, 29 unchanged

Rewritten

In our distribution segment, we owned an aggregate of [removed: 74,596] [added: approximately 76,000] miles of underground distribution and transmission mains throughout our distribution systems.

Rewritten

Through our pipeline and storage segment we owned [removed: 5,682] [added: approximately 5,700] miles of gas transmission lines.

Rewritten

The following table summarizes certain information regarding our underground gas storage facilities at September 30, [removed: 2024:][added: 2025:]

Rewritten

| Kentucky | | | | | | 7,956,991 | | | | | | 9,562,283 | | | | | | 17,519,274 | | | | | | [removed: 146,660] [added: 151,719] | | |

Rewritten

| *Total* | | | | | | 13,103,562 | | | | | | 14,305,200 | | | | | | 27,408,762 | | | | | | [removed: 207,796] [added: 212,855] | | |

Rewritten

The following table summarizes our contracted storage capacity at September 30, [removed: 2024:][added: 2025:]

Rewritten

| | | | | | | Colorado-Kansas Division | | | | | | [removed: 6,343,728] [added: 7,343,728] | | | | | | [removed: 147,692] [added: 157,692] | | |

Rewritten

| | | | | | | Kentucky/Mid-States Division | | | | | | [removed: 8,175,103] [added: 11,699,976] | | | | | | [removed: 226,320] [added: 281,320] | | |

Rewritten

| | | | | | | Mid-Tex Division | | | | | | [removed: 6,000,000] [added: 46,771,428] | | | | | | [removed: 190,000] [added: 1,260,000] | | |

Rewritten

| Total Contracted Storage Capacity | | | | | | | | | | | | [removed: 36,913,242] [added: 82,209,543] | | | | | | [removed: 1,281,791] [added: 2,416,791] | | |

New in FY2025

To manage the integrity and safety of our natural gas distribution and transmission systems, consistent with PHMSA regulations, we have integrity management programs that integrate information sources and data, identify risks to infrastructure integrity, rank risks, and designate measures and actions to reduce or mitigate risks as appropriate.

New in FY2025

These programs take into consideration numerous input factors and no single factor is determinative in our decision to take mitigative actions on our distribution or transmission pipeline systems.

New in FY2025

Based upon these programs, along with the oversight of state regulators responsible for adopting and enforcing the federal pipeline safety regulations, we believe that our distribution and transmission pipeline systems are suitable and adequate for our purposes.

New in FY2025

| Texas | | | | | | 52,761,317 | | | | | | 20,155,025 | | | | | | 72,916,342 | | | | | | 1,653,000 | | |

New in FY2025

| *Total* | | | | | | 53,172,357 | | | | | | 20,411,925 | | | | | | 73,584,282 | | | | | | 1,709,000 | | |

New in FY2025

| Total | | | | | | 66,275,919 | | | | | | 34,717,125 | | | | | | 100,993,044 | | | | | | 1,921,855 | | |

New in FY2025

| *Total* | | | | | | | | | | | | 80,709,543 | | | | | | 2,345,541 | | |

Dropped from FY2024

| Texas | | | | | | 53,083,549 | | | | | | 19,678,025 | | | | | | 72,761,574 | | | | | | 2,460,000 | | |

Dropped from FY2024

| *Total* | | | | | | 53,494,589 | | | | | | 19,934,925 | | | | | | 73,429,514 | | | | | | 2,516,000 | | |

Dropped from FY2024

| Total | | | | | | 66,598,151 | | | | | | 34,240,125 | | | | | | 100,838,276 | | | | | | 2,723,796 | | |

Dropped from FY2024

| *Total* | | | | | | | | | | | | 35,413,242 | | | | | | 1,210,541 | | |

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

9 rewritten, 5 added, 14 removed, 19 unchanged

Rewritten

Our stock trades on the New York Stock Exchange under the trading symbol “ATO.” The dividends paid per share of our common stock [added: was $3.48] for fiscal [removed: 2024 and 2023 are listed below.][added: 2025.]

Rewritten

As of October 31, [removed: 2024,] [added: 2025,] there were [removed: 8,968] [added: 8,446] holders of record of our common stock.

Rewritten

We sold no securities during fiscal [removed: 2024] [added: 2025] that were not registered under the Securities Act of 1933, as amended.

Rewritten

The graph and table below assume that $100.00 was invested on September 30, [removed: 2019] [added: 2020] in our common stock, the S&P 500 and the S&P 500 Utilities Industry Index, as well as a reinvestment of dividends paid on such investments throughout the period.

Rewritten

[removed: ![1390](https://www.sec.gov/Archives/edgar/data/731802/000073180224000030/ato-20240930_g5.jpg)][added: ![1391](https://www.sec.gov/Archives/edgar/data/731802/000073180225000056/ato-20250930_g5.jpg)]

Rewritten

| | | | [removed: 9/30/2019] [added: 9/30/2020] | | | | | | [removed: 9/30/2020] [added: 9/30/2021] | | | | | | [removed: 9/30/2021] [added: 9/30/2022] | | | | | | [removed: 9/30/2022] [added: 9/30/2023] | | | | | | [removed: 9/30/2023] [added: 9/30/2024] | | | | | | [removed: 9/30/2024] [added: 9/30/2025] | | |

Rewritten

The following table sets forth the number of securities authorized for issuance under our equity compensation plans at September 30, [removed: 2024.][added: 2025.]

Rewritten

| Total equity compensation plans approved by security holders | | | [removed: 737,219] [added: 703,176] | | | | | | — | | | | | | [removed: 407,966] [added: 2,166,340] | | |

Rewritten

(1)Comprised of a total of [removed: 259,666] [added: 229,681] time-lapse restricted stock units, [removed: 215,515] [added: 151,684] director share units, and [removed: 262,038] [added: 321,811] performance-based restricted stock units at the target level of performance granted under our 1998 Long-Term Incentive Plan.

New in FY2025

| Atmos Energy Corporation | | | 100.00 | | | | | | 94.68 | | | | | | 112.14 | | | | | | 119.61 | | | | | | 161.00 | | | | | | 202.67 | | |

New in FY2025

| S&P 500 Stock Index | | | 100.00 | | | | | | 130.01 | | | | | | 109.89 | | | | | | 133.65 | | | | | | 182.23 | | | | | | 214.30 | | |

New in FY2025

| S&P 500 Utilities Stock Index | | | 100.00 | | | | | | 111.01 | | | | | | 117.20 | | | | | | 108.98 | | | | | | 154.55 | | | | | | 171.86 | | |

New in FY2025

| 1998 Long-Term Incentive Plan | | | 703,176 | | | (1) | | | $ | — | | | | | 2,166,340 | | |

New in FY2025

| Total | | | 703,176 | | | | | | $ | — | | | | | 2,166,340 | | |

Dropped from FY2024

| | | | | | | | | | | | | | | |

Dropped from FY2024

| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |

Dropped from FY2024

| | | | | | | Fiscal 2024 | | | | | | Fiscal 2023 | | |

Dropped from FY2024

| Quarter ended: | | | | | | | | | | | | | | |

Dropped from FY2024

| December 31 | | | | | | $ | 0.805 | | | | | $ | 0.740 | |

Dropped from FY2024

| March 31 | | | | | | 0.805 | | | | | | 0.740 | | |

Dropped from FY2024

| June 30 | | | | | | 0.805 | | | | | | 0.740 | | |

Dropped from FY2024

| September 30 | | | | | | 0.805 | | | | | | 0.740 | | |

Dropped from FY2024

| | | | | | | $ | 3.22 | | | | | $ | 2.96 | |

Dropped from FY2024

| Atmos Energy Corporation | | | 100.00 | | | | | | 85.77 | | | | | | 81.21 | | | | | | 96.19 | | | | | | 102.59 | | | | | | 138.10 | | |

Dropped from FY2024

| S&P 500 Stock Index | | | 100.00 | | | | | | 115.15 | | | | | | 149.70 | | | | | | 126.54 | | | | | | 153.89 | | | | | | 209.84 | | |

Dropped from FY2024

| S&P 500 Utilities Stock Index | | | 100.00 | | | | | | 95.03 | | | | | | 105.49 | | | | | | 111.38 | | | | | | 103.56 | | | | | | 146.87 | | |

Dropped from FY2024

| 1998 Long-Term Incentive Plan | | | 737,219 | | | (1) | | | $ | — | | | | | 407,966 | | |

Dropped from FY2024

| Total | | | 737,219 | | | | | | $ | — | | | | | 407,966 | | |

Item 8. Financial Statements and Supplementary Data.

576 rewritten, 217 added, 160 removed, 1,314 unchanged

Rewritten

| [Report of independent registered public accounting [removed: firm](#i81a86c7a28f2449ea243859e5528848d_88)] [added: firm](#i9591964be34d49fd9e5cb6998100a581_91)] (PCAOB ID: 42) | | | [removed: [37](#i81a86c7a28f2449ea243859e5528848d_88)] [added: [37](#i9591964be34d49fd9e5cb6998100a581_91)] | | |

Rewritten

| [Consolidated balance sheets at September 30, [removed: 202](#i81a86c7a28f2449ea243859e5528848d_91)[4](#i81a86c7a28f2449ea243859e5528848d_91) [and 202](#i81a86c7a28f2449ea243859e5528848d_91)[3](#i81a86c7a28f2449ea243859e5528848d_91)] [added: 2025 and 2024](#i9591964be34d49fd9e5cb6998100a581_94)] | | | [removed: [39](#i81a86c7a28f2449ea243859e5528848d_91)] [added: [39](#i9591964be34d49fd9e5cb6998100a581_94)] | | |

Rewritten

| [Consolidated statements of comprehensive income for the years ended September 30, [removed: 202](#i81a86c7a28f2449ea243859e5528848d_94)[4](#i81a86c7a28f2449ea243859e5528848d_94)[, 202](#i81a86c7a28f2449ea243859e5528848d_94)[3](#i81a86c7a28f2449ea243859e5528848d_94)[,](#i81a86c7a28f2449ea243859e5528848d_94) [and 202](#i81a86c7a28f2449ea243859e5528848d_94)[2](#i81a86c7a28f2449ea243859e5528848d_94)] [added: 2025, 2024, and 2023](#i9591964be34d49fd9e5cb6998100a581_97)] | | | [removed: [40](#i81a86c7a28f2449ea243859e5528848d_94)] [added: [40](#i9591964be34d49fd9e5cb6998100a581_97)] | | |

Rewritten

| [Consolidated statements of shareholders' equity for the years ended September 30, [removed: 202](#i81a86c7a28f2449ea243859e5528848d_97)[4](#i81a86c7a28f2449ea243859e5528848d_97)[, 202](#i81a86c7a28f2449ea243859e5528848d_97)[3](#i81a86c7a28f2449ea243859e5528848d_97)[,](#i81a86c7a28f2449ea243859e5528848d_97) [and 202](#i81a86c7a28f2449ea243859e5528848d_97)[2](#i81a86c7a28f2449ea243859e5528848d_97)] [added: 2025, 2024, and 2023](#i9591964be34d49fd9e5cb6998100a581_100)] | | | [removed: [41](#i81a86c7a28f2449ea243859e5528848d_97)] [added: [41](#i9591964be34d49fd9e5cb6998100a581_100)] | | |

Rewritten

| [Consolidated statements of cash [removed: flow](#i81a86c7a28f2449ea243859e5528848d_100)[s](#i81a86c7a28f2449ea243859e5528848d_100) [for] [added: flows for] the years ended September 30, [removed: 202](#i81a86c7a28f2449ea243859e5528848d_100)[4](#i81a86c7a28f2449ea243859e5528848d_100)[, 202](#i81a86c7a28f2449ea243859e5528848d_100)[3](#i81a86c7a28f2449ea243859e5528848d_100)[,](#i81a86c7a28f2449ea243859e5528848d_100) [and 202](#i81a86c7a28f2449ea243859e5528848d_100)[2](#i81a86c7a28f2449ea243859e5528848d_100)] [added: 2025, 2024, and 2023](#i9591964be34d49fd9e5cb6998100a581_103)] | | | [removed: [42](#i81a86c7a28f2449ea243859e5528848d_100)] [added: [42](#i9591964be34d49fd9e5cb6998100a581_103)] | | |

Rewritten

| [Notes to consolidated financial [removed: statements](#i81a86c7a28f2449ea243859e5528848d_103)] [added: statements](#i9591964be34d49fd9e5cb6998100a581_106)] | | | [removed: [44](#i81a86c7a28f2449ea243859e5528848d_103)] [added: [44](#i9591964be34d49fd9e5cb6998100a581_106)] | | |

Rewritten

We have audited the accompanying consolidated balance sheets of Atmos Energy Corporation (the Company) as of September 30, [removed: 2024] [added: 2025] and [removed: 2023,] [added: 2024,] the related consolidated statements of comprehensive income, shareholders’ equity and cash flows for each of the three years in the period ended September 30, [removed: 2024,] [added: 2025,] and the related notes (collectively referred to as the "consolidated financial statements").

Rewritten

In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at September 30, [removed: 2024] [added: 2025] and [removed: 2023,] [added: 2024,] and the results of its operations and its cash flows for each of the three years in the period ended September 30, [removed: 2024,] [added: 2025,] in conformity with U.S. generally accepted accounting principles.

Rewritten

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of September 30, [removed: 2024,] [added: 2025,] based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated November [removed: 18, 2024] [added: 14, 2025] expressed an unqualified opinion thereon.

Rewritten

| *Description of the Matter* | | | As discussed in Note 3 to the consolidated financial statements, the Company’s distribution and pipeline and storage operations are subject to regulation with respect to rates, service, maintenance of accounting records and various other matters by the respective regulatory authorities in the states in which they operate. The Company’s accounting policies recognize the financial effects of the ratemaking and accounting practices and policies of the various regulatory commissions and are subject to accounting principles for rate-regulated activities. As a result, certain costs are permitted to be capitalized rather than expensed because they can be recovered through rates. The Company records certain costs as regulatory assets when future recovery through customer rates is considered probable. Regulatory liabilities are recorded when it is probable that revenues will be reduced for amounts that will be credited to customers through the ratemaking process. The amounts to be recovered or recognized are based upon the Company’s historical experience and understanding of the regulations. As of September 30, [removed: 2024,] [added: 2025,] there were [removed: $579.4] [added: $608.7] million of deferred costs included in regulatory assets and [removed: $1,227.9] [added: $1,269.6] million of regulatory liabilities awaiting cash outflow or potential refund. Auditing the effects of regulatory matters is complex as it requires specialized knowledge of rate-regulated activities and assessments as to matters that could affect the recording or updating of regulatory assets and liabilities. | | |

Rewritten

| | | | [added: 2025 | | | | | |] 2024 | | | | | | 2023 | | |

Rewritten

| Property, plant and equipment | | | $ | [removed: 24,784,285] [added: 28,028,820] | | | | | $ | [removed: 21,958,447] [added: 24,784,285] | |

Rewritten

| Construction in progress | | | [removed: 1,063,798] [added: 1,235,316] | | | | | | [removed: 939,927] [added: 1,063,798] | | |

Rewritten

| Less accumulated depreciation and amortization | | | [removed: 3,643,716] [added: 3,971,146] | | | | | | [removed: 3,291,791] [added: 3,643,716] | | |

Rewritten

| Net property, plant and equipment | | | [removed: 22,204,367] [added: 25,292,990] | | | | | | [removed: 19,606,583] [added: 22,204,367] | | |

Rewritten

| Cash and cash equivalents | | | [removed: 307,340] [added: 202,687] | | | | | | [removed: 15,404] [added: 307,340] | | |

Rewritten

| Restricted cash and cash equivalents [removed: (See Note 10)] | | | [removed: 1,516] [added: 1,116] | | | | | | [removed: 3,844] [added: 1,516] | | |

Rewritten

| Cash and cash equivalents and restricted cash and cash equivalents [added: at beginning of year] | | | 308,856 | | | | | | 19,248 | | | [added: | | | 51,554 | | |]

Rewritten

| Accounts receivable, less allowance for uncollectible accounts of [removed: $37,056] [added: $45,259] in [removed: 2024] [added: 2025] and [removed: $40,840] [added: $37,056] in [removed: 2023] [added: 2024] | | | [removed: 365,882] [added: 375,509] | | | | | | [removed: 328,654] [added: 365,882] | | |

Rewritten

| Gas stored underground | | | [removed: 169,508] [added: 171,756] | | | | | | [removed: 245,830] [added: 169,508] | | |

Rewritten

| Other current assets | | | [removed: 288,068] [added: 301,627] | | | | | | [removed: 292,036] [added: 288,068] | | |

Rewritten

| Total current assets | | | [removed: 1,132,314] [added: 1,052,695] | | | | | | [removed: 885,768] [added: 1,132,314] | | |

Rewritten

| Securitized intangible asset, less accumulated amortization of [removed: $10,756] [added: $18,473] in [removed: 2024] [added: 2025] and [removed: $1,398] [added: $10,756] in [removed: 2023] [added: 2024] (See Note 10) | | | [removed: 82,844] [added: 75,127] | | | | | | [removed: 92,202] [added: 82,844] | | |

Rewritten

| Deferred charges and other assets | | | [removed: 1,043,683] [added: 1,097,453] | | | | | | [removed: 1,201,158] [added: 1,043,683] | | |

Rewritten

| Common stock, no par value (stated at $0.005 per share); 200,000,000 shares authorized; issued and outstanding: [removed: 2024] [added: 2025] — [removed: 155,258,845] [added: 161,568,384] shares; [removed: 2023] [added: 2024] — [removed: 148,492,783] [added: 155,258,845] shares | | | $ | [removed: 776] [added: 808] | | | | | $ | [removed: 742] [added: 776] | |

Rewritten

| Additional paid-in capital | | | [removed: 7,474,559] [added: 8,221,455] | | | | | | [removed: 6,684,120] [added: 7,474,559] | | |

Rewritten

| Accumulated other comprehensive income | | | [removed: 465,715] [added: 475,015] | | | | | | [removed: 518,528] [added: 465,715] | | |

Rewritten

| Retained earnings | | | [removed: 4,216,619] [added: 4,861,612] | | | | | | [removed: 3,666,674] [added: 4,216,619] | | |

Rewritten

| Shareholders’ equity | | | [removed: 12,157,669] [added: 13,558,890] | | | | | | [removed: 10,870,064] [added: 12,157,669] | | |

Rewritten

| Long-term debt | | | [removed: 7,783,646] [added: 8,907,169] | | | | | | [removed: 6,554,133] [added: 7,783,646] | | |

Rewritten

| Securitized long-term debt (See Note 10) | | | [removed: 76,871] [added: 68,236] | | | | | | [removed: 85,078] [added: 76,871] | | |

Rewritten

| Total capitalization | | | [removed: 20,018,186] [added: 22,534,295] | | | | | | [removed: 17,509,275] [added: 20,018,186] | | |

Rewritten

| Accounts payable and accrued liabilities | | | [removed: 445,397] [added: 506,516] | | | | | | [removed: 336,083] [added: 445,397] | | |

Rewritten

| Other current liabilities | | | [removed: 750,620] [added: 835,557] | | | | | | [removed: 763,086] [added: 750,620] | | |

Rewritten

| [removed: Short-term] [added: Net increase (decrease) in short-term] debt | | | — | | | | | | [removed: 241,933] [added: (241,933)] | | | [added: | | | 56,966 | | |]

Rewritten

| Current maturities of long-term debt | | | [removed: 1,651] [added: 11,775] | | | | | | [removed: 1,568] [added: 1,651] | | |

Rewritten

| Current maturities of securitized long-term debt (See Note 10) | | | [removed: 8,207] [added: 8,767] | | | | | | [removed: 9,922] [added: 8,207] | | |

Rewritten

| Total current liabilities | | | [removed: 1,205,875] [added: 1,362,615] | | | | | | [removed: 1,352,592] [added: 1,205,875] | | |

Rewritten

| Deferred income taxes | | | [removed: 2,593,342] [added: 2,918,347] | | | | | | [removed: 2,304,974] [added: 2,593,342] | | |

Rewritten

| Regulatory excess deferred taxes (See Note 15) | | | [removed: 177,315] [added: 117,482] | | | | | | [removed: 253,212] [added: 177,315] | | |

New in FY2025

| | | | 2025 | | | | | | 2024 | | |

New in FY2025

| | | | 29,264,136 | | | | | | 25,848,083 | | |

New in FY2025

| | | | $ | 28,249,522 | | | | | $ | 25,194,465 | |

New in FY2025

| | | | $ | 28,249,522 | | | | | $ | 25,194,465 | |

New in FY2025

| Net income | | | $ | 1,198,754 | | | | | $ | 1,042,895 | | | | | $ | 885,862 | |

New in FY2025

| Net income | | | — | | | | | | — | | | | | | — | | | | | | — | | | | | | 1,198,754 | | | | | | 1,198,754 | | |

New in FY2025

| Public offering | | | 5,931,289 | | | | | | 30 | | | | | | 698,432 | | | | | | — | | | | | | — | | | | | | 698,462 | | |

New in FY2025

| 1998 Long-term incentive plan | | | 276,263 | | | | | | 2 | | | | | | 2,683 | | | | | | — | | | | | | — | | | | | | 2,685 | | |

New in FY2025

| Balance, September 30, 2025 | | | 161,568,384 | | | | | | $ | 808 | | | | | $ | 8,221,455 | | | | | $ | 475,015 | | | | | $ | 4,861,612 | | | | | $ | 13,558,890 | |

New in FY2025

| Net income | | | $ | 1,198,754 | | | | | $ | 1,042,895 | | | | | $ | 885,862 | |

New in FY2025

*Accounting pronouncements adopted in fiscal 2025*

New in FY2025

We adopted this amendment as of September 30, 2025 and applied it retrospectively for all periods presented.

New in FY2025

See Note 4 for further discussion.

New in FY2025

We early adopted this amendment as of September 30, 2025 and applied it retrospectively for all periods presented.

New in FY2025

See Note 15 for further discussion.

New in FY2025

*Accounting pronouncements that will be effective after fiscal 2025*

New in FY2025

In September 2025, the FASB issued guidance which provides qualitative updates to the determination of capitalizing internal-use software costs by expanding the scope to allow for various software development methods.

New in FY2025

Early adoption is permitted, and the amendment may be applied prospectively, retrospectively, or with a modified transition approach.

New in FY2025

| | | | 2025 | | | | | | 2024 | | |

New in FY2025

| | | | $ | 608,729 | | | | | $ | 579,390 | |

New in FY2025

| | | | $ | 1,269,648 | | | | | $ | 1,227,882 | |

New in FY2025

(3)In our APT and West Texas Divisions and portions of our Mid-Tex Division, the RRC has approved the deferral of certain system safety and integrity costs incurred in excess of a specified benchmark.

New in FY2025

These costs are eligible for recovery in a future filing after such costs are approved by the RRC.

New in FY2025

In

New in FY2025

Our Chief Operating Decision Maker (CODM), the Chief Executive Officer, evaluates performance for each reportable segment based on net income, which is used to help inform the allocation of resources as part of the Company's process for budgeting and monitoring financial performance.

New in FY2025

| Operating revenues from external parties | | | $ | 4,422,355 | | | | | $ | 280,400 | | | | | $ | 4,702,755 | |

New in FY2025

| Intersegment revenues | | | 3,042 | | | | | | 784,900 | | | | | | 787,942 | | |

New in FY2025

| Total operating revenues | | | 4,425,397 | | | | | | 1,065,300 | | | | | | 5,490,697 | | |

New in FY2025

| Operation and maintenance expense | | | 644,924 | | | | | | 229,986 | | | | | | 874,910 | | |

New in FY2025

| Depreciation and amortization expense (2) | | | 543,840 | | | | | | 190,905 | | | | | | 734,745 | | |

New in FY2025

| Interest charges (2) | | | 99,226 | | | | | | 72,452 | | | | | | 171,678 | | |

New in FY2025

| Income tax expense (2) | | | 150,961 | | | | | | 128,319 | | | | | | 279,280 | | |

New in FY2025

| Other segment items (1) | | | 2,239,665 | | | | | | (8,335) | | | | | | 2,231,330 | | |

New in FY2025

| Net income (2) | | | $ | 746,781 | | | | | $ | 451,973 | | | | | $ | 1,198,754 | |

New in FY2025

| Capital expenditures (2) | | | $ | 2,662,703 | | | | | $ | 898,696 | | | | | $ | 3,561,399 | |

New in FY2025

| *Reconciliation to consolidated total operating revenues:* | | | | | | | | | | | | | | | | | |

New in FY2025

| Total operating revenues of reportable segments | | | | | | | | | | | | | | | $ | 5,490,697 | |

New in FY2025

| Elimination of intersegment revenues | | | | | | | | | | | | | | | (787,942) | | |

New in FY2025

| Consolidated total operating revenues | | | | | | | | | | | | | | | $ | 4,702,755 | |

New in FY2025

| Operation and maintenance expense | | | 589,864 | | | | | | 218,571 | | | | | | 808,435 | | |

Dropped from FY2024

November 18, 2024

Dropped from FY2024

| | | | 25,848,083 | | | | | | 22,898,374 | | |

Dropped from FY2024

| | | | $ | 25,194,465 | | | | | $ | 22,516,968 | |

Dropped from FY2024

| Balance, September 30, 2021 | | | 132,419,754 | | | | | | $ | 662 | | | | | $ | 5,023,751 | | | | | $ | 69,803 | | | | | $ | 2,812,673 | | | | | $ | 7,906,889 | |

Dropped from FY2024

| Net income | | | — | | | | | | — | | | | | | — | | | | | | — | | | | | | 774,398 | | | | | | 774,398 | | |

Dropped from FY2024

| Public offering | | | 7,907,883 | | | | | | 40 | | | | | | 776,765 | | | | | | — | | | | | | — | | | | | | 776,805 | | |

Dropped from FY2024

| 1998 Long-term incentive plan | | | 427,929 | | | | | | 2 | | | | | | 2,396 | | | | | | — | | | | | | — | | | | | | 2,398 | | |

Dropped from FY2024

| Net increase (decrease) in short-term debt | | | (241,933) | | | | | | 56,966 | | | | | | 184,967 | | |

Dropped from FY2024

| | | | | | | | | |

Dropped from FY2024

| --- | --- | --- | --- | --- | --- | --- | --- | --- |

Dropped from FY2024

Early

Dropped from FY2024

adoption is permitted, and the amendments should be applied retrospectively.

Dropped from FY2024

We are currently evaluating the impact this may have on our financial statement disclosures.

Dropped from FY2024

The amendment is effective for fiscal years beginning after December 15, 2024, with early adoption permitted.

Dropped from FY2024

The amendments should be applied prospectively; however, retrospective application is also permitted.

Dropped from FY2024

This amendment will be effective for our Form 10-K for fiscal 2027 and our Form 10-Q for the first quarter of fiscal 2028.

Dropped from FY2024

of regulatory excess deferred taxes and regulatory cost of removal obligation are reported separately.

Dropped from FY2024

| | | | $ | 579,390 | | | | | $ | 554,928 | |

Dropped from FY2024

| | | | $ | 1,227,882 | | | | | $ | 1,284,334 | |

Dropped from FY2024

(3)In APT's general rate case settlement in December 2023, the RRC approved a new annual compliance filing that allows APT to recover certain system safety and integrity costs incurred each year.

Dropped from FY2024

Costs above a specified benchmark are deferred onto the balance sheet as incurred.

Dropped from FY2024

Once the filing is approved by the RRC, the revenue and expense are recognized over 12 months resulting in no impact to operating income.

Dropped from FY2024

See Note 10 to the consolidated financial statements for securitization and other information related to Atmos Energy Kansas Securitization I, LLC (AEK).

Dropped from FY2024

In 2021, the Texas Legislature passed House Bill 1520, which authorized the RRC to issue a statewide securitization financing order directing the Texas Public Finance Authority (TPFA) to issue bonds (customer rate relief bonds) for gas utilities that chose to participate to recover extraordinary costs incurred to secure gas supply and to provide service during Winter Storm Uri, and to restore gas utility systems after that event, thereby providing rate relief to customers by extending the period during which these extraordinary costs would otherwise be recovered and supporting the financial strength and stability of gas utility companies.

Dropped from FY2024

We collected $2.02 billion of this amount and relieved the regulatory asset.

Dropped from FY2024

Additionally, we deferred $32.4 million in carrying costs incurred after September 1, 2022.

Dropped from FY2024

During fiscal 2024, we have recovered $22.0 million of this amount.

Dropped from FY2024

Of the remaining $10.4 million, $4.0 million has been recorded as a current asset in other current assets as of September 30, 2024 and $6.4 million has been recorded as a long-term asset in deferred charges and other assets as of September 30, 2024 as we anticipate recovering this amount in future regulatory proceedings.

Dropped from FY2024

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

Dropped from FY2024

| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |

Dropped from FY2024

| Purchased gas cost | | | 1,620,515 | | | | | | 146 | | | | | | | | | | | | (686,968) | | | | | | 933,693 | | |

Dropped from FY2024

| Operation and maintenance expense | | | 601,370 | | | | | | 218,782 | | | | | | | | | | | | (1,015) | | | | | | 819,137 | | |

Dropped from FY2024

| Taxes, other than income | | | 346,840 | | | | | | 40,183 | | | | | | | | | | | | — | | | | | | 387,023 | | |

Dropped from FY2024

| Operating income | | | 854,434 | | | | | | 500,928 | | | | | | | | | | | | — | | | | | | 1,355,362 | | |

Dropped from FY2024

| Other non-operating income | | | 30,106 | | | | | | 40,940 | | | | | | | | | | | | — | | | | | | 71,046 | | |

Dropped from FY2024

| Income before income taxes | | | 767,454 | | | | | | 468,322 | | | | | | | | | | | | — | | | | | | 1,235,776 | | |

Dropped from FY2024

| | | | | | | | | | | | | | | | | | | | | | | | |

Dropped from FY2024

| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |

Dropped from FY2024

| Purchased gas cost | | | 2,061,920 | | | | | | (1,220) | | | | | | (608,527) | | | | | | 1,452,173 | | |

Dropped from FY2024

| Operation and maintenance expense | | | 565,179 | | | | | | 200,707 | | | | | | (980) | | | | | | 764,906 | | |

An excerpt. Shown here: 40 of 576 rewritten, 40 of 217 added and 40 of 160 removed. The counts are complete. For every sentence, read Item 8. Financial Statements and Supplementary Data. in the FY2025 filing and the FY2024 filing.

Item 9A. Controls and Procedures.

6 rewritten, 2 added, 2 removed, 34 unchanged

Rewritten

Based on this evaluation, the Company’s principal executive officer and principal financial officer have concluded that the Company’s disclosure controls and procedures were effective as of September 30, [removed: 2024] [added: 2025] to provide reasonable assurance that information required to be disclosed by us, including our consolidated entities, in the reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified by the SEC’s rules and forms, including a reasonable level of assurance that such information is accumulated and communicated to our management, including our principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.

Rewritten

Based on our evaluation under the framework in *Internal Control-Integrated Framework* issued by COSO and applicable Securities and Exchange Commission rules, our management concluded that our internal control over financial reporting was effective as of September 30, [removed: 2024,] [added: 2025,] in providing reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

Rewritten

We have audited Atmos Energy Corporation’s internal control over financial reporting as of September 30, [removed: 2024,] [added: 2025,] based on criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria).

Rewritten

In our opinion, Atmos Energy Corporation (the Company) maintained, in all material respects, effective internal control over financial reporting as of September 30, [removed: 2024,] [added: 2025,] based on the COSO criteria.

Rewritten

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the [removed: 2024] [added: 2025] consolidated financial statements of the Company and our report dated November [removed: 18, 2024] [added: 14, 2025] expressed an unqualified opinion thereon.

Rewritten

We did not make any changes in our internal control over financial reporting (as defined in Rule 13a-15(f) and 15d-15(f) under the Act) during the fourth quarter of the fiscal year ended September 30, [removed: 2024] [added: 2025] that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

New in FY2025

| November 14, 2025 | | | | | | | | |

New in FY2025

November 14, 2025

Dropped from FY2024

| November 18, 2024 | | | | | | | | |

Dropped from FY2024

November 18, 2024

Item 9B. Other Information.

1 rewritten, 0 added, 0 removed, 2 unchanged

Rewritten

During the three months ended September 30, [removed: 2024,] [added: 2025,] no director or officer of the Company adopted or terminated a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408(a) of Regulation S-K.

Item 10. Directors, Executive Officers and Corporate Governance.

10 rewritten, 5 added, 1 removed, 36 unchanged

Rewritten

Information regarding directors is incorporated herein by reference to the Company’s Definitive Proxy Statement for the Annual Meeting of Shareholders on February [removed: 5, 2025] [added: 4, 2026] under the heading "Proposal One - Election of Directors." Information regarding executive officers is reported below:

Rewritten

The following table sets forth certain information as of September 30, [removed: 2024,] [added: 2025,] regarding the executive officers of the Company.

Rewritten

| John K. Akers | | | | | | [removed: 61] [added: 62] | | | | | | [removed: 33] [added: 34] | | | | | | President, Chief Executive Officer and Director | | |

Rewritten

| Christopher T. Forsythe | | | | | | [removed: 53] [added: 54] | | | | | | [removed: 21] [added: 22] | | | | | | Senior Vice President and Chief Financial Officer | | |

Rewritten

| John S. McDill | | | | | | [removed: 60] [added: 61] | | | | | | [removed: 37] [added: 38] | | | | | | Senior Vice President, Utility Operations | | |

Rewritten

| [removed: Karen E. Hartsfield] [added: Jessica W. Bateman] | | | | | | [removed: 54] [added: 48] | | | | | | [removed: 9] [added: 1] | | | | | | Senior Vice President, General Counsel and Corporate Secretary | | |

Rewritten

| John M. Robbins | | | | | | [removed: 54] [added: 55] | | | | | | [removed: 11] [added: 12] | | | | | | Senior Vice President, Human Resources | | |

Rewritten

[removed: Hartsfield] [added: Bateman] was named Senior Vice President, General Counsel and Corporate [removed: Secretary of Atmos Energy,] [added: Secretary,] effective [removed: August 7, 2017.][added: January 1, 2025.]

Rewritten

Ms. Hartsfield joined the Company in June 2015, after having served in private practice for 19 years, [added: most recently as Managing Partner of Jackson Lewis LLP in its Dallas office from July 2013 to June 2015.]

Rewritten

Identification of the members of the Audit Committee of the Board of Directors as well as the Board of Directors’ determination as to whether one or more audit committee financial experts are serving on the Audit Committee of the Board of Directors is incorporated herein by reference to the Company’s Definitive Proxy Statement for the Annual Meeting of Shareholders on February [removed: 5, 2025.][added: 4, 2026.]

New in FY2025

| Karen E. Hartsfield | | | | | | 55 | | | | | | 10 | | | | | | Senior Advisor | | |

New in FY2025

Jessica W.

New in FY2025

Prior to joining Atmos Energy in January 2025, Ms. Bateman was in private practice for over 20 years at Baker Botts L.L.P., serving as a partner in the Dallas office.

New in FY2025

Hartsfield was named Senior Advisor, effective January 1, 2025.

New in FY2025

Previously, Ms. Hartsfield had served as Senior Vice President, General Counsel and Corporate Secretary from August 2017 to December 2024.

Dropped from FY2024

most recently as Managing Partner of Jackson Lewis LLP in its Dallas office from July 2013 to June 2015.

Item 11. Executive Compensation.

1 rewritten, 0 added, 0 removed, 2 unchanged

Rewritten

Information on executive compensation is incorporated herein by reference to the Company’s Definitive Proxy Statement for the Annual Meeting of Shareholders on February [removed: 5, 2025,] [added: 4, 2026,] under the captions "Director Compensation," "Compensation Discussion and Analysis," "Other Executive Compensation Matters," and "Named Executive Officer Compensation."

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

1 rewritten, 0 added, 0 removed, 2 unchanged

Rewritten

Security ownership of certain beneficial owners and of management is incorporated herein by reference to the Company’s Definitive Proxy Statement for the Annual Meeting of Shareholders on February [removed: 5, 2025,] [added: 4, 2026,] under the heading "Beneficial Ownership of Common Stock." Information concerning our equity compensation plans is provided in Part II, Item 5, “Market for Registrant’s Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities”, of this Annual Report on Form 10-K.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

1 rewritten, 0 added, 0 removed, 2 unchanged

Rewritten

Information on certain relationships and related transactions as well as director independence is incorporated herein by reference to the Company’s Definitive Proxy Statement for the Annual Meeting of Shareholders on February [removed: 5, 2025,] [added: 4, 2026,] under the heading "Corporate Governance and Other Board Matters," and "Proposal One – Election of Directors."

Item 14. Principal Accountant Fees and Services.

1 rewritten, 0 added, 0 removed, 3 unchanged

Rewritten

Information on our principal accountant’s fees and services is incorporated herein by reference to the Company’s Definitive Proxy Statement for the Annual Meeting of Shareholders on February [removed: 5, 2025,] [added: 4, 2026,] under the heading "Proposal [removed: Three] [added: Two] – Ratification of Appointment of Independent Registered Public Accounting Firm."

Item 15. Exhibits and Financial Statement Schedules.

13 rewritten, 5 added, 0 removed, 107 unchanged

Rewritten

| 4.1(b) | | | | | | [removed: [Description] [added: Description] of Registrant's [removed: Securities](https://www.sec.gov/Archives/edgar/data/731802/000073180224000030/ato2024930ex-41b.htm)] [added: Securities] | | | | | | [added: [Exhibit 4.1(b) to Form 10-K for fiscal year ended September 30, 2024 (File No. 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000073180224000030/ato2024930ex-41b.htm)] | | |

Rewritten

| 10.3(a) | | | | | | Equity Distribution Agreement, dated as of [removed: March 31, 2023,] [added: May 8, 2024,] among Atmos Energy Corporation and the Managers and Forward Purchasers named in Schedule A thereto | | | | | | [Exhibit 1.1 to Form 8-K dated [removed: March 31, 2023] [added: May 8, 2024] (File No. [removed: 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312523088377/d470311dex11.htm)] [added: 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312524134363/d829330dex11.htm)] | | |

Rewritten

| 10.3(b) | | | | | | Form of Master Forward Sale Confirmation | | | | | | [Exhibit 1.2 to Form 8-K dated [removed: March 31, 2023] [added: May 8, 2024] (File No. [removed: 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312523088377/d470311dex12.htm)] [added: 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312524134363/d829330dex12.htm)] | | |

Rewritten

| 10.4(a) | | | | | | Equity Distribution Agreement, dated as of [removed: May 8,] [added: December 3,] 2024, among Atmos Energy Corporation and the Managers and Forward Purchasers named in Schedule A thereto | | | | | | [Exhibit 1.1 to Form 8-K dated [removed: May 8,] [added: December 3,] 2024 (File No. [removed: 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312524134363/d829330dex11.htm)] [added: 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312524269563/d817932dex11.htm)] | | |

Rewritten

| 10.4(b) | | | | | | Form of Master Forward Sale Confirmation | | | | | | [Exhibit 1.2 to Form 8-K dated [removed: May 8,] [added: December 3,] 2024 (File No. [removed: 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312524134363/d829330dex12.htm)] [added: 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312524269563/d817932dex12.htm)] | | |

Rewritten

| 10.13(a)* | | | | | | [removed: Atmos] [added: [Atmos] Energy Corporation 1998 Long-Term Incentive Plan (as amended and restated February [removed: 3, 2021)] [added: 5, 2025)](https://www.sec.gov/Archives/edgar/data/731802/000073180225000056/ato20250930ex-1013a.htm)] | | | | | | [removed: [Exhibit 10.14(a) to Form 10-K for fiscal year ended September 30, 2022 (File No. 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000073180222000037/ato20220930ex-1014a.htm)] | | |

Rewritten

| 10.13(b)* | | | | | | [removed: Form] [added: [Form] of Award Agreement of Time-Lapse Restricted Stock Units under the Atmos Energy Corporation 1998 Long-Term Incentive [removed: Plan] [added: Plan](https://www.sec.gov/Archives/edgar/data/731802/000073180225000056/ato20250930ex-1013b.htm)] | | | | | | [removed: [Exhibit 10.13(b) to Form 10-K for fiscal year ended September 20, 2020 (File No. 1-10042)](https://www.sec.gov/Archives/edgar/data/0000731802/000073180220000040/ato2020930ex-1013b.htm)] | | |

Rewritten

| 19 | | | | | | [Insider Trading [removed: Policy](https://www.sec.gov/Archives/edgar/data/731802/000073180224000030/ato20240930ex-19.htm)] [added: Policy](https://www.sec.gov/Archives/edgar/data/731802/000073180225000056/ato20250930ex-19.htm)] | | | | | | | | |

Rewritten

| 21 | | | | | | [Subsidiaries of the [removed: registrant](https://www.sec.gov/Archives/edgar/data/731802/000073180224000030/ato20240930ex-21.htm)] [added: registrant](https://www.sec.gov/Archives/edgar/data/731802/000073180225000056/ato20250930ex-21.htm)] | | | | | | | | |

Rewritten

| 23.1 | | | | | | [Consent of independent registered public accounting firm, Ernst & Young [removed: LLP](https://www.sec.gov/Archives/edgar/data/731802/000073180224000030/ato20240930ex-231.htm)] [added: LLP](https://www.sec.gov/Archives/edgar/data/731802/000073180225000056/ato20250930ex-231.htm)] | | | | | | | | |

Rewritten

| 24 | | | | | | Power of Attorney | | | | | | Signature page of Form 10-K for fiscal year ended September 30, [removed: 2024] [added: 2025] | | |

Rewritten

| 31 | | | | | | [Rule 13a-14(a)/15d-14(a) [removed: Certifications](https://www.sec.gov/Archives/edgar/data/731802/000073180224000030/ato2024930ex-31.htm)] [added: Certifications](https://www.sec.gov/Archives/edgar/data/731802/000073180225000056/ato20250930ex-31.htm)] | | | | | | | | |

Rewritten

| 32 | | | | | | [Section 1350 [removed: Certifications](https://www.sec.gov/Archives/edgar/data/731802/000073180224000030/ato2024930ex-32.htm)] [added: Certifications](https://www.sec.gov/Archives/edgar/data/731802/000073180225000056/ato20250930ex-32.htm)] | | | | | | | | |

New in FY2025

| 4.9(mm) | | | | | | Officers' Certificate dated June 26, 2025 | | | | | | [Exhibit 4.2 to Form 8-K dated June 26, 2005 (File No. 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312525149018/d28440dex42.htm) | | |

New in FY2025

| 4.9(nn) | | | | | | Global Security for the 5.200% Senior Notes due 2035 | | | | | | [Exhibit 4.3 to Form 8-K dated June 26, 2005 (File No. 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312525149018/d28440dex43.htm) | | |

New in FY2025

| 4.9(oo) | | | | | | Officers' Certificate dated October 1, 2025 | | | | | | [Exhibit 4.2 to Form 8-K dated October 1, 2025 (File No. 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312525226779/d80338dex42.htm) | | |

New in FY2025

| 4.9(pp) | | | | | | Global Security for the 5.450% Senior Notes due 2056 | | | | | | [Exhibit 4.3 to Form 8-K dated October 1, 2025 (File No. 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312525226779/d80338dex43.htm) | | |

New in FY2025

| 4.9(qq) | | | | | | Global Security for the 5.450% Senior Notes due 2056 | | | | | | [Exhibit 4.4 to Form 8-K dated October 1, 2025 (File No. 1-10042)](https://www.sec.gov/Archives/edgar/data/731802/000119312525226779/d80338dex44.htm) | | |

Item 16. Form 10-K Summary.

15 rewritten, 0 added, 5 removed, 41 unchanged

Rewritten

Date: November [removed: 18, 2024][added: 14, 2025]

Rewritten

| /s/ KIM R. COCKLIN | | | | | | Chairman of the Board | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ JOHN K. AKERS | | | | | | President, Chief Executive Officer and Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ CHRISTOPHER T. FORSYTHE | | | | | | Senior Vice President and Chief Financial Officer | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ MICHELLE H. FAULK | | | | | | Vice President and Controller (Principal Accounting Officer) | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ JOHN C. ALE | | | | | | Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ KELLY H. COMPTON | | | | | | Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ SEAN DONOHUE | | | | | | Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ RAFAEL G. GARZA | | | | | | Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ EDWARD [added: J.] GEISER | | | | | | Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| Edward [added: J.] Geiser | | | | | | | | | | | | | | |

Rewritten

| /s/ RICHARD [removed: K. GORDON] [added: A. SAMPSON] | | | | | | Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ NANCY K. QUINN | | | | | | Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ TELISA TOLIVER | | | | | | Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Rewritten

| /s/ FRANK YOHO | | | | | | Director | | | | | | November [removed: 18, 2024] [added: 14, 2025] | | |

Dropped from FY2024

| | | | | | | | | | | | | | | |

Dropped from FY2024

| Richard K. Gordon | | | | | | | | | | | | | | |

Dropped from FY2024

| /s/ RICHARD A. SAMPSON | | | | | | Director | | | | | | November 18, 2024 | | |

Dropped from FY2024

| /s/ DIANA J. WALTERS | | | | | | Director | | | | | | November 18, 2024 | | |

Dropped from FY2024

| Diana J. Walters | | | | | | | | | | | | | | |