---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-218171"
form_type: "8-K"
ticker: "MPLX"
cik: "0001552000"
company_name: "MPLX LP"
filed_at: "2022-08-11T23:59:59+00:00"
generated_at: "2026-06-24T00:49:29.878057+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "low"
source: SEC EDGAR
---

# MPLX enters into debt underwriting agreement; terms undisclosed

## Summary
- Underwriting agreement dated Aug 8, 2022 with Barclays, Mizuho, Wells Fargo as representatives of underwriters.
- Twenty-sixth supplemental indenture dated Aug 11, 2022 with BNY Mellon as trustee, including form of note.
- Opinion of Jones Day filed as exhibit; no principal amount, interest rate, or maturity disclosed in filing.

## SEC filing metadata
- accession: 0001193125-22-218171
- form_type: 8-K
- ticker: MPLX
- cik: 0001552000
- company_name: MPLX LP
- filed_at: 2022-08-11T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: low
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1552000/000119312522218171/0001193125-22-218171-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1552000/000119312522218171/d375931d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-218171
- JSON: https://secwatch.observer/filing/0001193125-22-218171.json
- Plain text: https://secwatch.observer/filing/0001193125-22-218171.txt

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