Company: SOJE
Filing Date: 2025-11-03
Form Type: 424B5
Source: 0000092122-25-000088
Chunk: 41

Company: SOUTHERN CO
Filing Date: 2025-11-03
Form: 424B5
Chunk 41
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 Series 2025B RSNs and the Series 2025C RSNs have the terms described below:

| Series 2025B RSNs                                                                                                                                                                                                                                                                                                                          |     | Series 2025C RSNs                                                                                                                                                                                                                                                                                                                         |
| (Owed to Holder)Interest% per annum paid quarterly(1)(following a successful remarketing as fixed-rate notes, interest will be payable at a reset rate and will be payable semi-annually or, following a successful remarketing as floating-rate notes, interest will be payable based on a reset spread and will be payable quarterly)(2) |     | -Owed to Holder)Interest% per annum paid quarterly(1)(following a successful remarketing as fixed-rate notes, interest will be payable at a reset rate and will be payable semi-annually or, following a successful remarketing as floating-rate notes, interest will be payable based on a reset spread and will be payable quarterly)(2 |

| (Owed to Holder)$1,000at Maturity(December 15, 2030) |     | -Owed to Holder)$1,000at Maturity(December 15, 2033 |

(1) Interest payment dates may be adjusted in a successful remarketing as described under “Description of the Remarketable Senior Notes—Remarketing.” (2) In connection with any successful remarketing of the RSNs, the optional redemption will cease to apply to the Series 2025C RSNs. The Series 2025B RSNs shall not be subject to optional redemption at any time.

<div align='center'>S-23</div>

Transforming Corporate Units into Treasury Units and RSNs

| Purchase Contract                                                                   |     |   |     | 1/40 Ownership in Series 2025B RSN(1)(2)                                                                                                                                                                                                                                                         |     |   |     | 1/40 Ownership in Series 2025C RSN(1)(2)                                                                                                                                                                                                                                                         |     | Purchase Contract                                                                   |     |   |     | 1/20 Ownership Interest in Treasury Security |     | 1/40 Ownership in Series 2025B RSN(1)(2)                                                                                                                                                                                                                                                      |     | 1/40 Ownership in Series 2025C RSN(1)(2)                                                                                                                                                                                                                                                      |
| (Owed to Holder)                                                                    
 The Company’s Common Stock at Purchase Contract Settlement Date (December 15, 2028) 
 +                                                                                   
 Contract Adjustment