Company: SOJE
Filing Date: 2025-06-27
Form Type: 11-K
Source: 0000092122-25-000064
Chunk: 4

Company: SOUTHERN CO
Filing Date: 2025-06-27
Form: 11-K
Chunk 4
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, Inc., Southern Communications Services, Inc., Southern Power Company, Southern Nuclear Operating Company, Inc., and Southern Company GAS’ affiliated companies (collectively, referred to as the “Employing Companies”). The Plan is subject to the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), and the Internal Revenue Code of 1986, as amended (the “IRC”).

#### Plan Administration
The trustee and recordkeeper of the Plan are Bank of America, N.A. (the “Trustee”) and Merrill Lynch, Pierce, Fenner & Smith Incorporated, respectively.

#### Participation
Employees meeting certain criteria, as defined by the Plan, may elect to participate in the Plan as of the first day of any payroll period after the employee’s first day of employment or as soon as administratively practicable thereafter. Employees who do not make an affirmative election will be automatically enrolled after their first 30 days of employment.

#### Contributions
Participants may elect to make before-tax, Roth after-tax, or regular after-tax contributions, or a combination thereof of up to 50% of eligible compensation, as defined by the Plan. Participants may change the percentage of their contributions at any time. Contributions are subject to certain IRC limitations. Participants also may contribute by rolling over to the Plan amounts representing distributions from other qualified defined benefit plans, defined contribution plans, or eligible individual retirement accounts. Participants who attained age 50 before the end of the year are eligible to make catch-up contributions in accordance with limits as prescribed by the IRC.

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#### Southern Company Employee Savings Plan

### Notes to Financial Statements
Employees who are automatically enrolled are deemed to have elected a default contribution rate of six percent of compensation, provided that eligible employees may elect at any time to change the default elections as otherwise permitted by the terms of the Plan.

The Employing Companies’ contributions (“Employer Matching Contributions”) are discretionary and determined by the Board of Directors of the Plan Sponsor. For the year ended December 31, 2024, the Employing Companies contributed, on behalf of the participants, 85% of the first 6% of eligible compensation contributed by the participant.

The Board of Directors of the Plan Sponsor reserves the right to discontinue or change the Employer Matching Contributions at any time; however, it has not expressed any intent to make any changes at the present time.

#### Participant Accounts
Individual accounts are maintained for each Plan participant. Each participant’s account is credited with the participant’s contributions, the Employer Matching Contributions