Company: SOJE
Filing Date: 2025-01-10
Form Type: 424B2
Source: 0000092122-25-000006
Chunk: 46

Company: SOUTHERN CO
Filing Date: 2025-01-10
Form: 424B2
Chunk 46
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 communicated, falling within Article 49(2)(a) through (d) of the Order (all such persons together being referred to as “relevant persons”). The Series 2025A Junior Subordinated Notes are only available to, and any invitation, offer or agreement to subscribe, purchase or otherwise acquire such Series 2025A Junior Subordinated Notes 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 Series 2025A Junior Subordinated Notes 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 Series 2025A Junior Subordinated Notes in, from or otherwise involving the UK.

### LEGAL MATTERS
Certain legal matters in connection with the offering of the Series 2025A Junior Subordinated Notes 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.

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#### PROSPECTUS

#### The Southern Company

#### Common Stock

#### Senior Notes

#### Junior Subordinated Notes

#### Stock Purchase Contracts

#### Stock Purchase Units
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We will provide the specific terms of these securities in supplements to this Prospectus. You should read this Prospectus and the applicable Prospectus Supplement carefully before you invest.

The Southern Company’s common stock is listed on the New York Stock Exchange under the symbol “SO.”

See “Risk Factors” on page 1 for information on certain risks related to the purchase of securities offered by this Prospectus.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

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February 16, 2024

### ABOUT