Company: SOJE
Filing Date: 2025-01-10
Form Type: 424B2
Source: 0000092122-25-000006
Chunk: 47

Company: SOUTHERN CO
Filing Date: 2025-01-10
Form: 424B2
Chunk 47
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 THIS PROSPECTUS
This Prospectus is part of a registration statement filed with the Securities and Exchange Commission (the “Commission”) using a “shelf” registration process under the Securities Act of 1933, as amended (the “1933 Act”). Under the shelf process, The Southern Company (the “Company”) may sell, in one or more transactions,

| l |     | common stock (the “Common Stock”),                            |
| l |     | senior notes (the “Senior Notes”),                            |
| l |     | junior subordinated notes (the “Junior Subordinated Notes”),  |
| l |     | stock purchase contracts (the “Stock Purchase Contracts”), or |
| l |     | stock purchase units (the “Stock Purchase Units”).            |

This Prospectus provides a general description of those securities. Each time the Company sells securities, the Company will provide a prospectus supplement that will contain specific information about the terms of that offering (“Prospectus Supplement”). The Prospectus Supplement may also add, update or change information contained in this Prospectus. You should read this Prospectus and the applicable Prospectus Supplement together with the additional information under the heading “Available Information.”

### RISK FACTORS
Investing in the Company’s securities involves risk. Please see the risk factors described in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 (the “Form 10-K”), which is incorporated by reference in this Prospectus. Before making an investment decision, you should carefully consider these risks as well as other information contained or incorporated by reference in this Prospectus.

### AVAILABLE INFORMATION
The Company has filed with the Commission a registration statement on Form S-3 (the “Registration Statement,” which term encompasses any amendments to the Registration Statement and exhibits to the Registration Statement) under the 1933 Act. As permitted by the rules and regulations of the Commission, this Prospectus does not contain all of the information set forth in the Registration Statement and the exhibits and schedules to the Registration Statement, to which reference is made.

The Company is subject to the informational requirements of the Securities Exchange Act of 1934, as amended (the “1934 Act”), and in accordance with the 1934 Act files reports, proxy statements and other information with the Commission. The Commission maintains a website that contains reports, proxy statements and other information regarding registrants including the Company that file electronically at http://www.sec.gov. Copies of certain information filed by the Company with the Commission are