---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-225956"
form_type: "8-K"
ticker: "ATO"
cik: "0000731802"
company_name: "ATMOS ENERGY CORP"
filed_at: "2025-10-01T23:59:59+00:00"
generated_at: "2026-05-17T05:10:17.595449+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Atmos Energy prices $600M of 5.450% Senior Notes due 2056

## Summary
- $600M aggregate principal of 5.450% Senior Notes due 2056; expected close Oct 1, 2025.
- Net proceeds ~$589.8M after underwriting discount and estimated offering expenses.
- Underwriting agreement with BNP Paribas, Credit Agricole, Mizuho, U.S. Bancorp as reps.
- Notes issued under existing indenture modified by Officers' Certificate dated Oct 1, 2025.

## SEC filing metadata
- accession: 0001193125-25-225956
- form_type: 8-K
- ticker: ATO
- cik: 0000731802
- company_name: ATMOS ENERGY CORP
- filed_at: 2025-10-01T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/731802/000119312525225956/0001193125-25-225956-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/731802/000119312525225956/d32832d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-225956
- JSON: https://secwatch.observer/filing/0001193125-25-225956.json
- Plain text: https://secwatch.observer/filing/0001193125-25-225956.txt

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