Company: ATO
Filing Date: 2025-04-30
Form Type: S-8
Source: 0001193125-25-107536
Chunk: 0

Company: ATMOS ENERGY CORP
Filing Date: 2025-04-30
Form: S-8
Chunk 0
---
As filed with the Securities and Exchange Commission on April 30, 2025 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ATMOS ENERGY CORPORATION (Exact name of registrant as specified in its charter)

| Texas and Virginia              |     | 75-1743247         |
| (State or Other Jurisdiction of 
 Incorporation or Organization)  |     | -I.R.S. Employer   
 Identification No. |

1800 Three Lincoln Centre 5430 LBJ Freeway Dallas, Texas 75240 (Address of Principal Executive Offices, Zip Code) ATMOS ENERGY CORPORATION 1998 LONG-TERM INCENTIVE PLAN (Full title of the plan) Jessica W. Bateman Senior Vice President, General Counsel and Corporate Secretary Atmos Energy Corporation 1800 Three Lincoln Centre 5430 LBJ Freeway Dallas, Texas 75240 (972) 934-9227 (Name, address, including zip code, and telephone number, including area code, of agent for service) Copy to: Krista Hanvey Gibson, Dunn & Crutcher LLP 2001 Ross Avenue, Suite 2100 Dallas, Texas 75201 (214) 698-3100 Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-acceleratedfiler, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2of the Exchange Act.

| Large accelerated filer |     | ☒ |     | Accelerated filer         |     | ☐ |
| Non-accelerated filer   |     | ☐ |     | Smaller reporting company |     | ☐ |
|                         |     |   |     | Emerging growth company   |     | ☐ |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

EXPLANATORY NOTE This Registration Statement on Form S-8is being filed by Atmos Energy Corporation (the “Registrant”) pursuant to General Instruction E to Form S-8,