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SO · Current Report (Form 8-K) · Filed August 4, 2026

Southern Co — Current Report (Form 8-K)

Form
8-K
Filed
August 4, 2026
Period
Aug 3, 2026
Ticker
SO
Accession
0000092122-26-000060
Boardroom Alpha · Filing insights

Southern Company upsized and priced two convertible notes; also repurchased $369 million of Series 2024A notes.

About Southern Co
Market cap
$101.5B
1Y TSR
+0.7%
3Y TSR
+14.2%
Board grade
C+
Sector
Utilities
CEO
Christopher C Womack
Last annual meeting: May 13, 2026 · View full Southern Co profile →
so-20260803

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)August 3, 2026

Commission
File Number
Registrant,
State of Incorporation,
Address and Telephone Number
I.R.S. Employer
Identification No.
1-3526The Southern Company58-0690070
(A Delaware 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:




RegistrantTitle of each classTrading
Symbol(s)
Name of each exchange
on which registered
The Southern CompanyCommon Stock, par value $0.01 per shareSONew York Stock Exchange
The Southern CompanySeries 2017B 5.25% Junior Subordinated Notes due 2077SOJCNew York Stock Exchange
The Southern CompanySeries 2020A 4.95% Junior Subordinated Notes due 2080SOJDNew York Stock Exchange
The Southern Company
Series 2020C 4.20% Junior Subordinated Notes due 2060
SOJENew York Stock Exchange
The Southern CompanySeries 2021B 1.875% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2081SO 81New York Stock Exchange
The Southern CompanySeries 2025A 6.50% Junior Subordinated Notes due 2085SOJFNew York Stock Exchange
The Southern Company2025 Series A Corporate UnitsSOMNNew 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 August 3, 2026, The Southern Company (the “Company”) issued a press release announcing the upsize and pricing of offerings of $725 million aggregate principal amount of its Series 2026A 2.125% Convertible Senior Notes due December 15, 2027 (the “Series 2026A Convertible Notes”) and $1.65 billion aggregate principal amount of its Series 2026B 3.50% Convertible Senior Notes due September 15, 2029 (the “Series 2026B Convertible Notes” and, together with the Series 2026A Convertible Notes, the “Convertible Notes”) in private offerings to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended, reflecting an upsize of $75 million over the previously announced offering size of the Series 2026A Convertible Notes and $150 million over the previously announced offering size of the Series 2026B Convertible Notes. In addition, the Company granted the initial purchasers options to purchase, for settlement within a period of 13 days from, and including, the date the Convertible Notes are first issued, up to an additional $108.75 million aggregate principal amount of the Series 2026A Convertible Notes and up to an additional $247.5 million aggregate principal amount of the Series 2026B Convertible Notes.
Contemporaneously with the pricing of the Convertible Notes, the Company entered into separate and privately negotiated transactions with a limited number of holders of its Series 2024A 4.50% Convertible Senior Notes due June 15, 2027 (the “Series 2024A Convertible Notes”) to repurchase approximately $369 million aggregate principal amount of the Series 2024A Convertible Notes.
A copy of the press release is attached hereto as Exhibit 99.1 and incorporated by reference herein.



Item 9.01.
Financial Statements and Exhibits.
(d) Exhibits.
99.1
104Cover Page Interactive Data File – The cover page iXBRL tags are embedded within the inline XBRL document.



2


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: August 3, 2026THE SOUTHERN COMPANY
By/s/Melissa K. Caen
Melissa K. Caen
Assistant Secretary
3
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Reference

Frequently asked questions

When did Southern Co file this 8-K?
Southern Co (SO) filed this Current Report (Form 8-K) with the SEC on August 4, 2026. The accession number assigned by EDGAR is 0000092122-26-000060.
What does an 8-K disclose?
Form 8-K is the SEC's current-report form, used to disclose material events between periodic reports (10-K / 10-Q). Triggers include CEO/CFO departures, acquisitions, bankruptcies, earnings releases, auditor changes, changes in fiscal year, and amendments to corporate governance. Each 8-K is keyed to one or more Item numbers (1.01 through 9.01).
What is the key takeaway from this filing?
Southern Company upsized and priced two convertible notes; also repurchased $369 million of Series 2024A notes. This is Boardroom Alpha's one-line summary of the current report; see the full filing text above for the formal disclosure.
What Item codes does an 8-K cover?
An 8-K's Item codes (1.01 through 9.01) specify what kind of event is being disclosed — e.g. Item 1.01 for entering a material agreement, Item 5.02 for departure/election of directors and executive officers, Item 8.01 for other events. The Item codes for this 8-K appear in the filing text above.
Where can I find Southern Co's prior current reports on EDGAR?
The SEC EDGAR browser lists every 8-K Southern Co has filed under CIK 92122, sortable by date. Use the "View on SEC EDGAR" link in the page header, or browse directly via https://www.sec.gov/cgi-bin/browse-edgar.
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