Company: SOJE
Filing Date: 2025-03-31
Form Type: PRE 14A
Source: 0000092122-25-000032
Chunk: 72

Company: SOUTHERN CO
Filing Date: 2025-03-31
Form: PRE 14A
Chunk 72
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3 of the PRSUs, including DEUs, granted to the NEOs in February 2022 and the remaining 2/3 of the PRSUs, including DEUs, granted to the NEOs in February 2023. The achievement of the respective performance goals for these shares were certified by the Compensation Committee on February 13, 2023 for the shares granted in 2022 and February 7, 2024 for the shares granted in 2023. The PRSUs that vested in 2024, including the DEUs, are reflected in the Stock Vested in 2024 table. The remaining PRSUs granted in 2022 vest on the third anniversary of the grant date and the remaining PRSUs granted in 2023 will vest on the second and third anniversaries of the grant date.

These columns also reflect the full number and value of PRSUs granted to the NEOs in January 2024 that vest 1/3 each year for a three-year period subject to the achievement of a one-year financial performance goal (Southern Company’s 2024 cash from operations exceeds the amount paid in dividends in 2023) and associated DEUs on the PRSUs. DEUs only pay out if the underlying shares vest. The Compensation Committee certified the achievement of this goal on February 5, 2025 and the first 1/3 vested upon that certification. The remaining 2/3 will vest equally on the second and third anniversaries of the grant date.

Column (b) also reflects the target number of PSUs that can be earned at the end of each three-year performance period (January 1, 2023 through December 31, 2025 and January 1, 2024 through December 31, 2026). The number of shares reflected in column (b) also

#### 68Southern Company2025 Proxy Statement

#### Executive Compensation Tables
reflects the DEUs on the target number of PSUs. DEUs are credited over the performance period but are only received at the end of the performance period if the underlying PSUs are earned.

The PSUs granted for the January 1, 2022 through December 31, 2024 performance period vested on December 31, 2024 and are reported in the Stock Vested in 2024 table.

The value in column (c) is derived by multiplying the number of shares in column (b) by the common stock closing price on December