---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-362680"
form_type: "8-K"
ticker: "MPLX"
cik: "0001552000"
company_name: "MPLX LP"
filed_at: "2026-08-24T16:16:43+00:00"
generated_at: "2026-08-24T16:18:14.101915+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "low"
source: SEC EDGAR
---

# MPLX files debt offering exhibits; terms not disclosed

## Summary
- Underwriting agreement with TD Securities, Goldman Sachs, J.P. Morgan, SMBC Nikko, and Wells Fargo dated Aug 10, 2026.
- Three supplemental indentures (38th-40th) executed with BNY Mellon as trustee on Aug 24, 2026.
- No principal amount, interest rate, or maturity for the notes provided in this filing.
- Legal opinion from Jones Day included as exhibit.

## SEC filing metadata
- accession: 0001193125-26-362680
- form_type: 8-K
- ticker: MPLX
- cik: 0001552000
- company_name: MPLX LP
- filed_at: 2026-08-24T16:16:43+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: low
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1552000/000119312526362680/0001193125-26-362680-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1552000/000119312526362680/d178331d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-362680
- JSON: https://secwatch.observer/filing/0001193125-26-362680.json
- Plain text: https://secwatch.observer/filing/0001193125-26-362680.txt

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