Company: SOJE
Filing Date: 2025-02-25
Form Type: 424B5
Source: 0000092122-25-000022
Chunk: 68

Company: SOUTHERN CO
Filing Date: 2025-02-25
Form: 424B5
Chunk 68
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 been so incorporated in reliance upon the reports of such firm given upon their authority as experts in accounting and auditing.

<div align='center'>11

$</div>

#### .

<div align='center'>Series 2025B % Fixed-to-Fixed Reset Rate Junior Subordinated Notes due March 15, 2055

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### PROSPECTUS SUPPLEMENT
<div align='center'>February , 2025

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Joint Book-Running Managers</div>

| Barclays |     | Citigroup               |     | Mizuho            |
| MUFG     |     | PNC Capital Markets LLC |     | Truist Securities |