Company: ATO
Filing Date: 2025-12-09
Form Type: PRE 14A
Source: 0000731802-25-000061
Chunk: 3

Company: ATMOS ENERGY CORP
Filing Date: 2025-12-09
Form: PRE 14A
Chunk 3
---
2025, will be entitled to notice of, and to vote at, our meeting. Whether or not you plan to attend the annual meeting, we urge you to vote as soon as possible by one of these methods.

| BY INTERNET       
 www.proxyvote.com |     | BY TELEPHONE   
 1.800.690.6903 |     | BY MAIL                                                               
 Follow the instructions on your proxy card or voting instruction form |

#### 2026 Proxy Statement3
If you are a beneficial owner of shares held through a broker, bank, or other holder of record, you must follow the voting instructions you receive from the holder of record to vote your shares. Shareholders may also vote during the virtual meeting using the unique control number assigned to him or her. For more information on how to vote your shares, please refer to “Information About the Meeting” beginning on page 68.

Jessica W. Bateman

Senior Vice President,

General Counsel and Corporate Secretary

December 19, 2025

#### 4Atmos Energy
| About Atmos Energy |

Atmos Energy Corporation, a natural gas-only distributor, is an S&P 500 company headquartered in Dallas. We safely deliver reliable, efficient, and abundant natural gas to approximately 3.4 million distribution customers in over 1,400 communities across eight states located primarily in the South. As part of our Vision to be the safest provider of natural gas services, we are modernizing our business and infrastructure while continuing to invest in safety, innovation, environmental sustainability, and our communities. Atmos Energy manages proprietary pipeline and storage assets, including one of the largest intrastate natural gas pipeline systems in Texas.

| Our Company  |     | We are a fully regulated, natural gas-only distributor of reliable, efficient, and abundant energy.                                                                                                            |
| Our Vision   |     | Our Vision is for Atmos Energy to be thesafestprovider of natural gas services. We will be recognized forexceptional customer service, for being agreat employer, and for achievingsuperior financial results. |
| Our Strategy |     | Atmos Energy’s strategy is to:                                                                                                                                                                                 
 •operate ourbusinessexceptionally well                                                                                                                                                                         
 •invest in ourpeopleand ourinfrastructure                                                                                                                                                                      
 •enhance ourculture                                                                                                                                                                                            |

#### 2026 Proxy Statement5
| Fiscal 2025 Performance Highlights |

### Financial Results and Accomplishments
In fiscal 2025, Atmos Energy continued to work toward achieving our Vision of being the safest provider of natural