Company: SOJE
Filing Date: 2025-01-08
Form Type: 424B5
Source: 0000092122-25-000002
Chunk: 1

Company: SOUTHERN CO
Filing Date: 2025-01-08
Form: 424B5
Chunk 1
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2025A Junior Subordinated Notes to begin within 30 days after the date that the Series 2025A Junior Subordinated Notes are first issued.

See “RISK FACTORS” beginning on page S-7 for a description of certain risks associated with investing in the Series 2025A Junior Subordinated Notes.

|                                                    |     | Per Series 2025A Junior Subordinated Note |     |   |     | Total |
|:---------------------------------------------------|:----|:------------------------------------------|:----|:--|:----|:------|
| Initial public offering price (1)                  |     |                                           |     | % |     | $     |
| Underwriting discount (2)                          |     |                                           |     | % |     | $     |
| Proceeds, before expenses, to The Southern Company |     |                                           |     | % |     | $     |

(1) Plus accrued interest, if any, from the date of original issuance of the Series 2025A Junior Subordinated Notes, which is expected to be January , 2025.

(2) An underwriting discount of $ per Series 2025A Junior Subordinated Note (or up to $ for all Series 2025A Junior Subordinated Notes) will be deducted from the proceeds paid to The Southern Company by the underwriters. However, the discount will be $ per Series 2025A Junior Subordinated Note for sales to institutions and, to the extent of such institutional sales, the total underwriting discount will be less than the amount set forth in the above table. As a result of sales to institutions, the total proceeds to The Southern Company increased by $ , and the total underwriting discount was $ . Certain other expenses of the offering will be paid by The Southern Company.

Neither the Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities or passed upon the accuracy or adequacy of this Prospectus Supplement or the accompanying Prospectus. Any representation to the contrary is a criminal offense.

The underwriters will have the option to purchase up to an additional $ in principal amount of the Series 2025A Junior Subordinated Notes in order to cover over-allotments, if any. If the option is exercised, any such Series 2025A Junior Subordinated Notes are expected to be delivered on or about the same date set forth in the paragraph below. Should the underwriters exercise this option in full, the total initial public offering price, underwriting discount and proceeds, before