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NYSE: SO SOUTHERN CO 8-K

Southern Co announces $2.15B convertible notes offering to refinance existing debt

Filed August 3, 2026 · Period ending August 3, 2026 · ~1 min read

4 key changes 2 high relevance 1 section

Key Changes

  • high

    Offering $650M of 2027 convertible notes and $1.5B of 2029 convertible notes in private placements to qualified institutional buyers, with greenshoe options for up to $322.5M additional notes.

    Item 8.01 — Other Events verify on EDGAR →
  • high

    Proceeds will repurchase portions of existing Series 2024A 4.50% convertible notes due June 2027 and Series 2025A 3.25% notes due June 2028, with remainder repaying short-term debt and general corporate purposes.

    Exhibit 99.1 view on EDGAR →
  • medium

    Notes have conditional conversion rights initially, becoming freely convertible three months before maturity. Company will pay cash for principal and may settle excess conversion value in cash, stock, or combination.

    Exhibit 99.1 view on EDGAR →
  • medium

    Company warns that holders unwinding arbitrage hedges on existing convertibles being repurchased could temporarily increase stock price and raise effective conversion prices on new notes.

    Exhibit 99.1 view on EDGAR →

Summary

Southern Company announced a $2.15 billion convertible notes offering split between $650 million due December 2027 and $1.5 billion due September 2029, with potential to reach $2.47 billion if greenshoe options are exercised. The offering represents a refinancing of existing convertible debt: proceeds will repurchase portions of the company's Series 2024A 4.50% notes due June 2027 and Series 2025A 3.25% notes due June 2028, with remaining funds repaying short-term debt. The new notes feature conditional conversion rights that become unrestricted three months before maturity.

Upon conversion, Southern will pay cash for the principal amount and has flexibility to settle any excess in cash, stock, or a combination, limiting potential dilution. The company disclosed that holders of the existing convertibles likely maintain short stock positions as part of arbitrage strategies, and unwinding these hedges during the repurchase could create temporary upward pressure on the stock price and affect the new notes' effective conversion prices. This is a routine debt refinancing with no material concerns for existing shareholders beyond normal convertible dilution risk.

Section-by-Section Diff

Event · Exhibit 99.1

Southern Company announces $2.15 billion convertible notes offerings to refinance existing convertibles and repay short-term debt.

3 Added
Added Convertible notes offerings high

Added in current filing · view on EDGAR →

Southern Company (NYSE: SO) today announced offerings of $650 million in aggregate principal amount of its convertible senior notes due December 15, 2027 (the “2027 Convertible Notes”) and $1.5 billion in aggregate principal amount of its convertible senior notes due September 15, 2029 (the “2029 Convertible Notes” and, together with the 2027 Convertible Notes, the “Convertible Notes”) in private placements to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”).

Southern Company is raising $2.15 billion through two series of convertible senior notes: $650 million due December 2027 and $1.5 billion due September 2029. The notes are being sold in private placements to qualified institutional buyers. Final terms including conversion price and interest rate will be determined at pricing.

Added Market impact disclosure medium

Added in current filing · view on EDGAR →

Southern Company expects that holders of the Existing Convertible Notes that sell their Existing Convertible Notes to Southern Company in any note repurchase transaction may enter into or unwind various derivatives with respect to Southern Company’s common stock and/or purchase or sell shares of Southern Company’s common stock in the market to hedge their exposure in connection with these transactions. In particular, Southern Company expects that many holders of the Existing Convertible Notes employ a convertible arbitrage strategy with respect to the Existing Convertible Notes and have a short position with respect to Southern Company’s common stock that they would close, through purchases of Southern Company’s common stock and/or the entry into or unwind of economically equivalent derivatives transactions with respect to Southern Company’s common stock, in connection with Southern Company’s repurchase of their Existing Convertible Notes for cash. This activity could increase (or reduce the size of any decrease in) the market price of Southern Company’s common stock or the Convertible Notes at that time and could result in higher effective conversion prices for the Convertible Notes.

The company warns that holders of the existing convertibles being repurchased likely maintain short stock positions as part of arbitrage strategies. Unwinding these hedges in connection with the repurchase could drive stock purchases and temporarily increase the share price, potentially raising the effective conversion price of the new notes. This disclosure alerts investors to near-term technical trading dynamics.

Show 1 minor / wording change
Added Greenshoe options low

Added in current filing · view on EDGAR →

In addition, Southern Company expects to grant the initial purchasers of the Convertible Notes 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 $97.5 million in aggregate principal amount of the 2027 Convertible Notes and up to an additional $225 million in aggregate principal amount of the 2029 Convertible Notes.

The underwriters have 13-day options to purchase additional notes: up to $97.5 million of the 2027 notes and up to $225 million of the 2029 notes. If fully exercised, total issuance would reach $2.47 billion. These greenshoe options are standard in debt offerings to accommodate excess demand.

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Figures/quotes linked to EDGAR · Narrative written by AI · Aug 4, 2026 · How we verify