01—Abstract
Summary
Summary of the 8-K filed August 4, 2026. Cited figures are marked; the original filing is the authoritative source.
Southern Company (NYSE: SO) priced two private, Rule 144A offerings of convertible senior notes totaling $2.375 billiona in base principal: $725 million of 2.125% Series 2026A notes due December 15, 2027, and $1.65 billion of 3.50% Series 2026B notes due September 15, 2029.
Both offerings were upsized, and initial purchasers hold options for up to an additional $356.25 millionb (about $108.75 million of 2026A and $247.5 million of 2026B), which would raise total principal to roughly $2.73 billion if fully exercised. The offerings are expected to close August 6, 2026. The Series 2026A notes carry a conversion price of about $104.56, a 12.5% premium to the August 3, 2026 reference price, and the Series 2026B notes carry a conversion price of about $118.50, a 27.5% premium.
Both imply a reference stock price of roughly $92.94c. Net proceeds are estimated at about $2.35 billion in the base case. The company will use about $403 million of that to repurchase about $369 million of its 4.50% Series 2024A convertible notes due June 2027, and it plans to use the remainder mainly to repay short-term debt and for general corporate purposes, including investments in subsidiaries.
Because the 2024A repurchases are being done at a premium to par, the effective cost of retiring that debt is about 9%d above principal. For investors, the transaction refinances near-term convertible debt and short-term borrowings with lower-coupon, longer-dated capital, and the company's cash-settlement election for conversion excess should limit share dilution.
The main near-term risk is that convertible arbitrage hedging by 2024A holders, including short-covering and derivative unwinds tied to the repurchases, could pressure SO's share price and raise the effective conversion prices. The filing also includes standard caveats that repurchases may be partial or not occur, and that the company cannot guarantee the offering closing terms.
02—Key points
Key Highlights
- Total base offering of $2.375 billion in convertible notes ($725M Series 2026A at 2.125% due Dec 2027; $1.65B Series 2026B at 3.50% due Sept 2029), with up to $356.25M more in initial purchaser options
- Both series were upsized: +$75M for 2026A and +$150M for 2026B over prior announced sizes
- Conversion prices of $104.56 (2026A, 12.5% premium) and $118.50 (2026B, 27.5% premium), implying a reference share price of about $92.94 on August 3, 2026
- Estimated net proceeds of about $2.35 billion in the base case (about $2.73 billion gross if all options are exercised)
- About $403 million of proceeds will repurchase approximately $369 million of the 4.50% Series 2024A convertible notes due June 2027, a price of roughly 109% of par
- Remaining proceeds to repay short-term debt and fund general corporate purposes, including subsidiary investment
- Upon conversion, the company will pay cash up to principal and may settle the excess in cash, shares, or a combination, which limits dilution risk; hedging activity by 2024A holders could pressure the stock near term
03—Questions
Frequently Asked Questions
How much capital is Southern Company raising, and what are the key terms?
The company is pricing $725 million of 2.125% Series 2026A convertible notes due December 15, 2027, and $1.65 billion of 3.50% Series 2026B convertible notes due September 15, 2029, for $2.375 billion in base principal. Initial purchasers also hold options for up to about $356.25 million more. The notes are sold in private Rule 144A offerings and are expected to close on August 6, 2026.
Will these notes dilute existing shareholders?
Dilution should be limited. Upon conversion, the company must pay cash up to the principal amount of the notes being converted. It can settle any excess conversion value in cash, shares, or a combination, at its election. Conversion prices are $104.56 for 2026A and $118.50 for 2026B, which are well above the reference price of about $92.94. Conversion is restricted before September 15, 2027 (2026A) and June 15, 2029 (2026B), except upon specified events.
Why is the company repurchasing 2024A convertible notes, and at what cost?
The company is using about $403 million of proceeds to repurchase about $369 million of its 4.50% Series 2024A convertible notes due June 2027. That is roughly a 9% premium to par, reflecting the notes' trading and conversion value at the time. The repurchases refinance higher-coupon near-term debt with lower-coupon notes. The filing notes that the final amount repurchased is not assured, and additional repurchases may occur after the offerings close.
Could the transaction affect Southern Company's stock price in the short term?
Possibly. The company expects holders of the 2024A notes who sell to it to hedge or unwind positions tied to SO common stock, including short positions held as part of convertible arbitrage strategies. Buying back shares or unwinding derivatives could push the stock price up or reduce any decline, and could also raise the effective conversion prices of the new notes.
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