Southern Co Launches $2.15B Convertible Note Offering to Refinance Debt
SO is trading near its 52-week low of $83.8 (9.3% above the low).
Summary
Southern Company announced a $2.15 billion convertible note offering to refinance existing convertible debt and repay short-term borrowings, a move that reshapes its capital structure and could influence share price through hedging activity. The offering was later upsized to $725 million due 2027 and $1.65 billion due 2029, with conversion premiums set at 12.5% and 27.5%, and the company agreed to repurchase about $369 million of its Series 2024A notes.
Updated with an SEC 8-K filing · What changed
Updates
· SEC 8-K — Southern Co upsized the offerings to $725M Series 2026A 2.125% notes due 2027 and $1.65B Series 2026B 3.50% notes due 2029, with conversion premiums of 12.5% and 27.5%, respectively. It also agreed to repurchase about $369M of its Series 2024A 4.50% notes.
Key Events · Financing and Capital Events · SO
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Updated · · SEC 8-K
$2.15B Convertible Note Offering Upsized
Southern Company is offering $650 million in convertible notes due 2027 and $1.5 billion due 2029 in a private placement to qualified institutional buyers, later upsized to $725 million due 2027 and $1.65 billion due 2029.
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Updated · · SEC 8-K
Proceeds to Refinance Existing Debt
Net proceeds will be used to repurchase a portion of its Series 2024A 4.50% and Series 2025A 3.25% convertible notes, and to repay short-term debt. The company agreed to repurchase about $369 million of its Series 2024A 4.50% notes.
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Updated · · SEC 8-K
Terms Set for New Notes
The Series 2026A notes due 2027 carry a 2.125% interest rate and a 12.5% conversion premium; the Series 2026B notes due 2029 carry a 3.50% interest rate and a 27.5% conversion premium. Final conversion price and other terms will be set at pricing; the notes will be convertible only under certain conditions before their respective free-conversion dates.
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Potential Stock Impact from Hedging
Holders of existing notes may unwind hedges and buy stock as part of the repurchase, which could increase the stock price and result in higher effective conversion prices for the new notes.
Analysis · SO · Energy & Transportation
Southern Company is raising $2.15 billion through two convertible note tranches — $650 million due 2027 and $1.5 billion due 2029 — in a private placement, later upsized to $725 million due 2027 and $1.65 billion due 2029. The proceeds will be used to repurchase a portion of its existing convertible notes (Series 2024A and 2025A) and pay down short-term debt. The company has agreed to repurchase about $369 million of its Series 2024A 4.50% notes. This is a significant refinancing move that could reduce near-term dilution risk from the older convertibles while adding new potential dilution from the new notes. The concurrent repurchase of existing notes may also create upward pressure on the stock as holders unwind hedges. The new notes carry conversion premiums of 12.5% for the 2027 notes and 27.5% for the 2029 notes, with interest rates of 2.125% and 3.50%, respectively. Final terms, including conversion price, are yet to be set, leaving the exact dilution impact uncertain.
How filings like this one have moved
In the 30 days to Oct 15, 2026, 37.1% of the 974 measured filings Wiseek scored 8 moved their stock by 5% or more by the next session's close. The median move was -0.64%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, SO was trading at $91.57 on NYSE in the Energy & Transportation sector, with a market capitalization of approximately $108.8B. The 52-week trading range was $83.80 to $100.84. This filing was assessed with neutral market sentiment and an importance score of 8 out of 10.