---
schema_version: "secwatch.filing_event.v1"
accession: "0000092122-25-000080"
form_type: "8-K"
ticker: "SO"
cik: "0000092122"
company_name: "SOUTHERN CO"
filed_at: "2025-09-15T23:59:59+00:00"
generated_at: "2026-05-17T06:42:28.976776+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Southern Co adjusts conversion rate for Series 2023A 3.875% notes to 11.9035 shares per $1,000

## Summary
- Conversion rate adjusted to 11.9035 shares per $1,000 principal effective September 15, 2025.
- Adjustment triggered by six quarterly dividends exceeding the $0.70/share Distribution Threshold.
- Previously deferred conversion rate increases (each <1%) combined and applied now per indenture terms.
- Series 2023A 3.875% Convertible Senior Notes mature December 15, 2025.

## SEC filing metadata
- accession: 0000092122-25-000080
- form_type: 8-K
- ticker: SO
- cik: 0000092122
- company_name: SOUTHERN CO
- filed_at: 2025-09-15T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/92122/000009212225000080/0000092122-25-000080-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/92122/000009212225000080/so-20250915.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000092122-25-000080
- JSON: https://secwatch.observer/filing/0000092122-25-000080.json
- Plain text: https://secwatch.observer/filing/0000092122-25-000080.txt

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