---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-226779"
form_type: "8-K"
ticker: "ATO"
cik: "0000731802"
company_name: "ATMOS ENERGY CORP"
filed_at: "2025-10-01T23:59:59+00:00"
generated_at: "2026-05-17T05:10:21.525833+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

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

## Summary
- Completed public offering of $600M aggregate principal amount of 5.450% Senior Notes due 2056.
- Net proceeds of approximately $589.8M after underwriting discount and offering expenses.
- Notes mature January 15, 2056; interest payable semi-annually on Jan 15 and Jul 15 starting Jan 15, 2026.
- Notes are unsecured senior obligations ranking equally with existing unsubordinated debt.
- Issued under existing indenture; redeemable at company's option.

## SEC filing metadata
- accession: 0001193125-25-226779
- 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: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/731802/000119312525226779/0001193125-25-226779-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/731802/000119312525226779/d80338d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-226779
- JSON: https://secwatch.observer/filing/0001193125-25-226779.json
- Plain text: https://secwatch.observer/filing/0001193125-25-226779.txt

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