Company: SOJE
Filing Date: 2025-04-11
Form Type: DEFA14A
Source: 0000092122-25-000037
Chunk: 0

Company: SOUTHERN CO
Filing Date: 2025-04-11
Form: DEFA14A
Chunk 0
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934 (Amendment No. )</div>

| ☑ |     | Filed by the Registrant |     | ☐ |     | Filed by a party other than the Registrant |

| CHECK THE APPROPRIATE BOX: |     |                                                                                 |
| ☐                          |     | Preliminary Proxy Statement                                                     |
| ☐                          |     | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| ☐                          |     | Definitive Proxy Statement                                                      |
| ☑                          |     | Definitive Additional Materials                                                 |
| ☐                          |     | Soliciting Material under §240.14a-12                                           |

#### The Southern Company
<div align='center'>(Name of Registrant as Specified In Its Charter)
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

| PAYMENT OF FILING FEE (CHECK ALL BOXES THAT APPLY): |     |                                                                                                     |
| ☑                                                   |     | No fee required                                                                                     |
| ☐                                                   |     | Fee paid previously with preliminary materials                                                      |
| ☐                                                   |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |