SOUTHERN CO
For the period ended Mar 16, 2026. Filed Mar 19, 2026.
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Mar 16, 2026 · Filed Mar 19, 2026
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D. C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
| Date of Report (Date of earliest event reported) | March 16, 2026 |
| CommissionFile Number | Registrant,State of Incorporation,Address and Telephone Number | I.R.S. EmployerIdentification No. |
| 1-3526 | The Southern Company | 58-0690070 |
(ADelaware Corporation)
30 Ivan Allen Jr. Boulevard, N.W.
Atlanta, Georgia 30308
(404)506-5000
The name and address of the registrant have not changed since the last report.
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
| ☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |
|---|---|
| ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |
| ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
| ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |
Securities registered pursuant to Section 12(b) of the Act:
| Registrant | Title of each class | TradingSymbol(s) | Name of each exchangeon which registered |
|---|---|---|---|
| The Southern Company | Common Stock, par value $5 per share | SO | New York Stock Exchange |
| The Southern Company | Series 2017B 5.25% Junior Subordinated Notes due 2077 | SOJC | New York Stock Exchange |
| The Southern Company | Series 2020A 4.95% Junior Subordinated Notes due 2080 | SOJD | New York Stock Exchange |
| The Southern Company | Series 2020C 4.20% Junior Subordinated Notes due 2060 | SOJE | New York Stock Exchange |
| The Southern Company | Series 2021B 1.875% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2081 | SO 81 | New York Stock Exchange |
| The Southern Company | Series 2025A 6.50% Junior Subordinated Notes due 2085 | SOJF | New York Stock Exchange |
| The Southern Company | 2025 Series A Corporate Units | SOMN | New York Stock Exchange |
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐
| Item 8.01. | Other Events. |
|---|
On March 16, 2026, The Southern Company (the “Company”) entered into an Underwriting Agreement with Citigroup Global Markets Inc., J.P. Morgan Securities LLC, Mizuho Securities USA LLC, Morgan Stanley & Co. LLC and U.S. Bancorp Investments, Inc., as representatives of the several Underwriters named in Schedule I thereto (the “Underwriters”), covering the issue and sale of $1,300,000,000 aggregate principal amount of its Series 2026A 6.00% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due April 1, 2058 (the “Series 2026A Junior Subordinated Notes”). The Series 2026A Junior Subordinated Notes were registered under the Securities Act of 1933, as amended, pursuant to the shelf registration statement (Registration No. 333-277138) of the Company.
| Item 9.01. | Financial Statements and Exhibits. |
|---|
| (d) Exhibits. | |
|---|---|
| 1.3 | Underwriting Agreement relating to the Series 2026A Junior Subordinated Notes, dated March 16, 2026, among the Company and Citigroup Global Markets Inc., J.P. Morgan Securities LLC, Mizuho Securities USA LLC, Morgan Stanley & Co. LLC and U.S. Bancorp Investments, Inc., as representatives of the several Underwriters named in Schedule I thereto. |
| 4.4 | Seventeenth Supplemental Indenture to Subordinated Note Indenture dated as of March 19, 2026, providing for the issuance of the Series 2026A Junior Subordinated Notes. |
| 4.8 | Form of the Series 2026A Junior Subordinated Note (included in Exhibit 4.4 above). |
| 5.1 | Opinion of Troutman Pepper Locke LLP relating to the Series 2026A Junior Subordinated Notes. |
| 8.1 | Tax Opinion of Troutman Pepper Locke LLP relating to the Series 2026A Junior Subordinated Notes. |
| 23.1 | Consent of Troutman Pepper Locke LLP (included in Exhibit 5.1 above). |
| 23.2 | Consent of Troutman Pepper Locke LLP (included in Exhibit 8.1 above). |
| 104 | Cover Page Interactive Data File – The cover page iXBRL tags are embedded within the inline XBRL document. |
SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
| Date: March 19, 2026 | THE SOUTHERN COMPANY | |
|---|---|---|
| By | /s/Melissa K. Caen | |
| Melissa K. CaenAssistant Secretary | ||
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.