---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-029672"
form_type: "8-K"
ticker: "MPLX"
cik: "0001552000"
company_name: "MPLX LP"
filed_at: "2023-02-09T23:59:59+00:00"
generated_at: "2026-06-19T20:15:33.859718+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "low"
source: SEC EDGAR
---

# MPLX files underwriting agreement and indentures for note issuance; terms undisclosed

## Summary
- Filed underwriting agreement dated Feb 2, 2023 with J.P. Morgan, BofA, MUFG as representatives.
- Twenty-Seventh and Twenty-Eighth Supplemental Indentures dated Feb 9, 2023 with BNY Mellon as trustee.
- Opinion of Jones Day filed as Exhibit 5.1.
- No principal amount, interest rate, or maturity specified in this 8-K.

## SEC filing metadata
- accession: 0001193125-23-029672
- form_type: 8-K
- ticker: MPLX
- cik: 0001552000
- company_name: MPLX LP
- filed_at: 2023-02-09T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: low
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1552000/000119312523029672/0001193125-23-029672-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1552000/000119312523029672/d452047d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-029672
- JSON: https://secwatch.observer/filing/0001193125-23-029672.json
- Plain text: https://secwatch.observer/filing/0001193125-23-029672.txt

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