Company: SOJE
Filing Date: 2025-02-26
Form Type: 424B2
Source: 0000092122-25-000026
Chunk: 0

Company: SOUTHERN CO
Filing Date: 2025-02-26
Form: 424B2
Chunk 0
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Filed Pursuant to Rule 424(b)(2)

Registration No. 333-277138

PROSPECTUS SUPPLEMENT

(To Prospectus dated February 16, 2024)

<div align='center'>$1,800,000,000

Series 2025B 6.375% Fixed-to-Fixed Reset Rate
Junior Subordinated Notes due March 15, 2055</div>

The Series 2025B 6.375% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due March 15, 2055 (the “Series 2025B Junior Subordinated Notes”) will bear interest (i) from and including the date of original issuance to, but excluding, March 15, 2035 at an annual rate of 6.375% and (ii) from and including March 15, 2035 during each Interest Reset Period (as defined herein) at an annual rate equal to the Five-Year Treasury Rate (as defined herein) as of the most recent Reset Interest Determination Date (as defined herein), plus 2.069%; provided, that the interest rate during any Interest Reset Period will not reset below 6.375% (which equals the initial interest rate on the Series 2025B Junior Subordinated Notes). Interest will be payable semi-annually in arrears on March 15 and September 15 of each year, beginning on September 15, 2025. The Series 2025B Junior Subordinated Notes will be issued in registered form and in denominations of $2,000 and integral multiples of $1,000 in excess thereof. The Series 2025B Junior Subordinated Notes will mature on March 15, 2055.

So long as no Event of Default (as defined herein) has occurred and is continuing, The Southern Company may defer interest payments on the Series 2025B Junior Subordinated Notes on one or more occasions for up to 10 consecutive years as described in this Prospectus Supplement. Deferred interest payments will accrue additional interest at a rate equal to the interest rate then applicable to the Series 2025B Junior Subordinated Notes, to the extent permitted by applicable law.

The Southern Company may redeem the Series 2025B Junior Subordinated Notes at its option at the times and the prices described in this Prospectus Supplement.

The Series 2025B Junior Subordinated Notes are a new issue of securities with no established trading market. The Southern Company does not intend to apply for listing