---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-23-095712"
form_type: "8-K"
ticker: "OKE"
cik: "0001039684"
company_name: "ONEOK INC /NEW/"
filed_at: "2023-12-14T23:59:59+00:00"
generated_at: "2026-06-07T12:30:01.535963+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "medium"
source: SEC EDGAR
---

# ONEOK assumes Magellan's debt obligations under supplemental indentures

## Summary
- ONEOK assumed Magellan's obligations under the 2007 and 2010 indentures on Dec 13, 2023.
- Magellan provided a guarantee of the currently outstanding notes under both indentures.
- U.S. Bank Trust Company, National Association acts as trustee under the supplemental indentures.
- This step completes the integration of Magellan's debt into ONEOK following the September 2023 merger.

## SEC filing metadata
- accession: 0001213900-23-095712
- form_type: 8-K
- ticker: OKE
- cik: 0001039684
- company_name: ONEOK INC /NEW/
- filed_at: 2023-12-14T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: medium
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1039684/000121390023095712/0001213900-23-095712-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1039684/000121390023095712/ea190028-8k_oneokinc.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-23-095712
- JSON: https://secwatch.observer/filing/0001213900-23-095712.json
- Plain text: https://secwatch.observer/filing/0001213900-23-095712.txt

## Key facts
- Material Agreements
  ONEOK INC /NEW/ entered into supplemental indenture to the Indenture, dated as of April 19, 2007 (as supplemented, the "2007 Indenture") with U.S. Bank Trust Company, National Association (effective 2023-12-13).
  - Action: entry
  - Agreement: notes offering
  - Counterparty: U.S. Bank Trust Company, National Association
  - Effective: 2023-12-13
  source text: on December 13, 2023, ONEOK, ONEOK Partners, L.P., a Delaware limited partnership (“ONEOK Partners”), ONEOK Partners Intermediate Limited Partnership, a Delaware limited partnership (“Intermediate Partnership”), Magellan, and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”), entered into (i) a supplemental indenture to the Indenture, dated as of April 19, 2007 (as supplemented, the “2007 Indenture”)
  evidence_url: https://www.sec.gov/Archives/edgar/data/1039684/000121390023095712/0001213900-23-095712-index.htm

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