Company: SOJE
Filing Date: 2025-06-27
Form Type: 11-K
Source: 0000092122-25-000064
Chunk: 2

Company: SOUTHERN CO
Filing Date: 2025-06-27
Form: 11-K
Chunk 2
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 amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

#### Supplemental Information
The supplemental information contained in the Schedule of Assets (Held at End of Year) has been subjected to audit procedures performed in conjunction with the audits of the Plan's financial statements. The supplemental information is the responsibility of the Plan's management. Our audit procedures included determining whether the supplemental information reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented 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.

We have served as the Plan’s auditor since 2016.

/s/Warren Averett, LLC

Atlanta, Georgia

June 27, 2025

<div align='center'>1</div>

#### The Southern Company Employee Savings Plan

#### Statements of Net Assets Available for Benefits
|                                    |     | December 31, |          2024 |     |   |          2023 |
|:-----------------------------------|:----|:-------------|--------------:|:----|:--|--------------:|
| Investments, at fair value         |     | $            | 9,167,476,568 |     | $ | 8,264,410,461 |
| Notes receivable from participants |     |              |   132,504,338 |     |   |   126,397,574 |
| Cash, non-interest bearing         |     |              |       107,592 |     |   |       386,036 |
| Net assets available for benefits  |     | $            | 9,300,088,498 |     | $ | 8,391,194,071 |

<div align='center'>See accompanying notes to financial statements.

2</div>

#### The Southern Company Employee Savings Plan
<div align='center'>Statement of Changes in Net Assets Available for Benefits</div>

#### Year Ended December 31, 2024