---
schema_version: "secwatch.filing_event.v1"
accession: "0000092122-25-000050"
form_type: "8-K"
ticker: "SO"
cik: "0000092122"
company_name: "SOUTHERN CO"
filed_at: "2025-05-20T23:59:59+00:00"
generated_at: "2026-05-21T00:55:17.431288+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Southern Company offers $1.25B in convertible senior notes due 2028

## Summary
- Offering of $1.25B in convertible notes due June 15, 2028; underwriters may purchase additional $200M.
- Interest rate and conversion price to be determined at pricing; notes are senior, unsecured obligations.
- Proceeds to repurchase portions of outstanding 3.875% notes due 2025 and 4.50% notes due 2027.
- Remaining proceeds to repay commercial paper and for general corporate purposes, including subsidiary investments.
- Private placement to qualified institutional buyers under Rule 144A; notes and conversion shares not registered.

## SEC filing metadata
- accession: 0000092122-25-000050
- form_type: 8-K
- ticker: SO
- cik: 0000092122
- company_name: SOUTHERN CO
- filed_at: 2025-05-20T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/92122/000009212225000050/0000092122-25-000050-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/92122/000009212225000050/so-20250520.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000092122-25-000050
- JSON: https://secwatch.observer/filing/0000092122-25-000050.json
- Plain text: https://secwatch.observer/filing/0000092122-25-000050.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.