Company: SOJE
Filing Date: 2025-11-04
Form Type: 424B2
Source: 0000092122-25-000092
Chunk: 176

Company: SOUTHERN CO
Filing Date: 2025-11-04
Form: 424B2
Chunk 176
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 Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the “Order”) and/or (ii) who are high net worth companies, and other persons to whom it may lawfully be communicated, falling within Article 49(2)(a) through (d) of the Order (all such persons together being referred to as “relevant persons”). The Equity Units are only available to, and any invitation, offer or agreement to subscribe, purchase or otherwise acquire such Equity Units will be engaged in only with, relevant persons. Any person who is not a relevant person should not act or rely on this Prospectus Supplement and the accompanying Prospectus or any of their contents.

Each underwriter has represented and agreed that it has only communicated or caused to be communicated and will only communicate or cause to be communicated an invitation or inducement to engage in investment activity (within the meaning of Section 21 of the FSMA) received by it in connection with the issue or sale of the Equity Units in circumstances in which Section 21(1) of the FSMA does not apply to the Company and it has complied and will comply with all applicable provisions of the FSMA with respect to anything done by it in relation to the Equity Units in, from or otherwise involving the UK.

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### LEGAL MATTERS
Certain legal matters in connection with the offering of the Equity Units will be passed upon for the Company by Troutman Pepper Locke LLP and for the underwriters by Hunton Andrews Kurth LLP. From time to time, Hunton Andrews Kurth LLP acts as counsel to affiliates of the Company for some matters.

### EXPERTS
The consolidated financial statements, and the related financial statement schedule, incorporated in this Prospectus by reference from the Company’s Annual Report on Form 10-K for the year ended December 31, 2024, and the effectiveness of the Company’s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports, which are incorporated herein by reference. Such consolidated financial statements and financial statement schedule have been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

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### PROSPECTUS

#### The Southern Company

#### Common Stock

#### Senior Notes

#### Junior Subordinated Notes

#### Stock Purchase Contracts

#### Stock