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    Southern Company filed SEC Form 8-K: Regulation FD Disclosure, Financial Statements and Exhibits

    9/15/25 7:58:10 AM ET
    $SOJF
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    so-20250915
    0000092122FALSE00000921222025-09-152025-09-150000092122us-gaap:CommonStockMember2025-09-152025-09-150000092122so:Series2017B5.25JuniorSubordinatedNotesDue2077Member2025-09-152025-09-150000092122so:Series2020A4.95JuniorSubordinatedNotesDue2080Member2025-09-152025-09-150000092122so:Series2020C420JuniorSubordinatedNotesDue2060Member2025-09-152025-09-150000092122so:Series2021B1875FixedToFixedResetRateJuniorSubordinatedNotesDue2081Member2025-09-152025-09-150000092122so:Series2025A6.50JuniorSubordinatedNotesDue2085Member2025-09-152025-09-15

    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)September 15, 2025

    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 $5 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



    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 7.01.Regulation FD Disclosure.
    On September 15, 2025, The Southern Company (the “Company”) announced an adjustment (the “Adjustment”) to the conversion rate for its Series 2023A 3.875% Convertible Senior Notes due December 15, 2025 (the “Series 2023A Convertible Senior Notes”). The notice of the Adjustment is attached as Exhibit 99.1 to this Current Report on Form 8-K and will also be posted to the fixed income section of the Company’s investor relations website — https://investor.southerncompany.com/fixed-income/default.aspx — under the “Additional Information” heading. The Company advises that it intends to make public disclosures in this location of its website for conversion rate adjustments (if any) for the Series 2023A Convertible Senior Notes, its Series 2024A 4.50% Convertible Senior Notes due June 15, 2027, its Series 2025A 3.25% Convertible Senior Notes due June 15, 2028 and other convertible notes (if any) it issues in the future.
    Item 9.01.Financial Statements and Exhibits.
     (d) Exhibits.
      99.1
    Notice to Holders of the Series 2023A Convertible Senior Notes.
      104Cover 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: September 15, 2025THE SOUTHERN COMPANY
    By/s/Melissa K. Caen
    Melissa K. Caen
    Assistant Secretary
    2
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