Company: ATO
Filing Date: 2025-06-26
Form Type: 11-K
Source: 0000731802-25-000020
Chunk: 2

Company: ATMOS ENERGY CORP
Filing Date: 2025-06-26
Form: 11-K
Chunk 2
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 in the supplemental information. In forming our opinion on the supplemental information, we evaluated whether the supplemental information, including its form and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental information is fairly stated, in all material respects, in relation to the financial statements as a whole.

/s/ Whitley Penn LLP

We have served as the Plan’s auditor since 2006.

Plano, Texas

June 26, 2025

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### ATMOS ENERGY CORPORATION RETIREMENT

### SAVINGS PLAN AND TRUST

### STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
| Assets                             |     | December 31 
 2024        |               |     | 2023 |               |
|:-----------------------------------|:----|:------------|--------------:|:----|:-----|--------------:|
| Total investments                  |     | $           | 1,118,693,461 |     | $    |   995,709,627 |
| Receivables:                       |     |             |               |     |      |               |
| Participant contributions          |     |             |             — |     |      |     1,321,805 |
| Company contributions              |     |             |             — |     |      |     8,299,331 |
| Due from broker                    |     |             |         1,106 |     |      |        23,232 |
| Notes receivable from participants |     |             |    17,922,148 |     |      |    16,850,536 |
| Total receivables                  |     |             |    17,923,254 |     |      |    26,494,904 |
| Total assets                       |     |             | 1,136,616,715 |     |      | 1,022,204,531 |
| Net assets available for benefits  |     | $           | 1,136,616,715 |     | $    | 1,022,204,531 |

<div align='center'>See accompanying notes

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### ATMOS ENERGY CORPORATION RETIREMENT

### SAVINGS PLAN AND TRUST

### STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS

#### Year ended December 31,