Company: SOJE
Filing Date: 2025-06-27
Form Type: 11-K
Source: 0000092122-25-000064
Chunk: 7

Company: SOUTHERN CO
Filing Date: 2025-06-27
Form: 11-K
Chunk 7
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ient is not used when it is determined to be probable that the fund will sell the investment for an amount different than the reported NAV. Participant transactions (purchases and sales) may occur daily.

Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividend income is recorded on the ex-dividend date. The Plan presents, in the statement of changes in net assets available for benefits, the appreciation in the fair value of its investments, which consists of realized and unrealized gains and losses of those investments.

#### Payment of Benefits
Benefit payments to participants or beneficiaries are recorded upon distribution.

#### Notes Receivable from Participants
Notes receivable from participants represent participant loans that are recorded at their unpaid principal balance plus any accrued but unpaid interest. Interest income on notes receivable from participants is recorded when it is earned. Related fees are recorded as administrative expenses and are deducted when they are incurred. If a participant ceases to make loan repayments and the plan administrator deems the participant loan to be a distribution, the participant loan balance is reduced and a benefit payment is recorded.

#### 3. Fair Value Measurements
Financial Accounting Standards Board Accounting Standard Codification Topic 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs to valuation techniques used to measure fair value. These levels, in order of highest to lowest priority are described below:

| Level 1 |     | Quoted prices (unadjusted) in active markets for identical assets or liabilities at the measurement date.                                                                                   |
| Level 2 |     | Observable prices that are based on inputs not quoted on active markets but corroborated by market data.                                                                                    |
| Level 3 |     | Prices that are unobservable for the asset or liability and are developed based on the best information available under the circumstances, which might include the Plan Sponsor’s own data. |

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#### Southern Company Employee Savings Plan

### Notes to Financial Statements
The Plan classifies its investments based on the lowest level of input that is significant to the fair value measurement. The following tables set forth, by level within the fair value hierarchy, a summary of the Plan’s investments measured at fair value as of December 31, 2024 and 2023.

| December 31, 2024               |     | Level 1 |               |     | Level 2 |            |     | Total |               |
|:--------------------------------|:----|:--------|--------------:|: