Southern Company Announces Convertible Notes Upsize and Pricing

What Happened
On August 3, 2026, The Southern Company announced the upsize and pricing of private offerings of convertible senior notes to qualified institutional buyers. The company priced $725 million aggregate principal of Series 2026A 2.125% Convertible Senior Notes due December 15, 2027 and $1.65 billion aggregate principal of Series 2026B 3.50% Convertible Senior Notes due September 15, 2029. These sizes reflect an increase of $75 million for the 2026A notes and $150 million for the 2026B notes versus prior announcements. Southern also granted initial purchasers options to buy up to an additional $108.75 million of 2026A notes and $247.5 million of 2026B notes (exercise period: 13 days from issuance). Contemporaneously, the company repurchased approximately $369 million aggregate principal of its Series 2024A 4.50% Convertible Senior Notes due June 15, 2027.

Key Details

• Series 2026A: $725 million issued, 2.125% interest, maturity December 15, 2027; $75M upsized from prior announcement; plus $108.75M option.
• Series 2026B: $1.65 billion issued, 3.50% interest, maturity September 15, 2029; $150M upsized; plus $247.5M option.
• Repurchase: ~ $369 million of Series 2024A 4.50% notes (due June 15, 2027) repurchased in private transactions.
• Offerings were private placements to qualified institutional buyers under Rule 144A.

Why It Matters
This filing shows Southern Company is raising capital through convertible debt, which affects the company’s near- and medium-term funding and interest obligations. Convertible notes typically carry lower interest rates than straight debt but can convert into equity, which could dilute shareholders if conversions occur. The repurchase of a portion of the Series 2024A notes reduces an outstanding near-term convertible liability. For investors, key considerations are the added liquidity and altered maturity profile, potential future dilution from conversions, and the company’s interest expense mix going forward.