---
schema_version: "secwatch.filing_event.v1"
accession: "0000092122-26-000060"
form_type: "8-K"
ticker: "SO"
cik: "0000092122"
company_name: "SOUTHERN CO"
filed_at: "2026-08-04T01:35:26+00:00"
generated_at: "2026-08-04T10:05:29.876875+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Southern Company upsizes and prices $2.375B in convertible notes; repurchases $369M of existing notes

## Summary
- Pricing of $725M Series 2026A 2.125% convertible notes due 2027 and $1.65B Series 2026B 3.50% convertible notes due 2029, upsized by $75M and $150M respectively.
- Initial conversion prices: $104.56/share (12.5% premium) for 2026A, $118.50/share (27.5% premium) for 2026B.
- Net proceeds estimated at ~$721M (2026A) and ~$1.63B (2026B); ~$403M used to repurchase $369M of Series 2024A 4.50% convertible notes.
- Remaining proceeds to repay short-term debt and for general corporate purposes.
- Offerings expected to close August 6, 2026; initial purchasers have options to buy additional $108.75M (2026A) and $247.5M (2026B).

## SEC filing metadata
- accession: 0000092122-26-000060
- form_type: 8-K
- ticker: SO
- cik: 0000092122
- company_name: SOUTHERN CO
- filed_at: 2026-08-04T01:35:26+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/92122/000009212226000060/0000092122-26-000060-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/92122/000009212226000060/so-20260803.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000092122-26-000060
- JSON: https://secwatch.observer/filing/0000092122-26-000060.json
- Plain text: https://secwatch.observer/filing/0000092122-26-000060.txt

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