Company: SOJE
Filing Date: 2025-02-25
Form Type: 424B5
Source: 0000092122-25-000022
Chunk: 17

Company: SOUTHERN CO
Filing Date: 2025-02-25
Form: 424B5
Chunk 17
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 following the occurrence of a Rating Agency Event (as defined below), at 102% of their principal amount plus any accrued and unpaid interest thereon (including any Additional Interest) to the redemption date.

<div align='center'>S-13</div>

“Rating Agency Event” means a change to the methodology or criteria that were employed by an applicable nationally recognized statistical rating organization for purposes of assigning equity credit to securities such as the Series 2025B Junior Subordinated Notes on the date of original issuance of the Series 2025B Junior Subordinated Notes, which change reduces the amount of equity credit assigned to the Series 2025B Junior Subordinated Notes as compared with the amount of equity credit that such rating agency had assigned to the Series 2025B Junior Subordinated Notes as of the date of original issuance thereof.

#### Ranking
The Company’s payment obligations under the Series 2025B Junior Subordinated Notes will be unsecured and will rank junior and be subordinated in right of payment and upon liquidation to all of its Senior Indebtedness, whether presently existing or from time to time hereafter incurred, created, assumed or existing. See “Description of the Junior Subordinated Notes — Subordination” in the accompanying Prospectus.

#### Events of Default
The following are the “Events of Default” with respect to the Series 2025B Junior Subordinated Notes, which are modified from the events of default described in the accompanying Prospectus:

• failure to pay principal of, or premium, if any, on or interest on the Series 2025B Junior Subordinated Notes when due at maturity or earlier redemption;

• failure to pay interest on the Series 2025B Junior Subordinated Notes (including Additional Interest) when due and payable (other than at maturity or upon earlier redemption) that continues for 30 days (subject to the Company’s right to optionally defer interest payments); or

• certain events of bankruptcy, insolvency or reorganization involving the Company.

With respect to the Series 2025B Junior Subordinated Notes, the term “Default” means the following event: default in the performance or breach of any covenant or warranty of the Company in the Subordinated Note Indenture (other than (i) a covenant or warranty a default in whose performance or whose breach is addressed in the preceding paragraph or (ii) certain other covenants and warranties inapplicable to the Series 2025B Junior Subordinated Notes), and continuance of such default or breach for a period of 90