---
schema_version: "secwatch.filing_event.v1"
accession: "0001552000-25-000030"
form_type: "8-K"
ticker: "MPLX"
cik: "0001552000"
company_name: "MPLX LP"
filed_at: "2025-08-25T23:59:59+00:00"
generated_at: "2026-05-17T10:12:49.446870+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# MPLX LP expands board to 11, elects Ray N. Walker, Jr. as director

## Summary
- Board increased to 11 members; Ray N. Walker, Jr. elected effective August 25, 2025.
- Walker to serve on audit committee and conflicts committee of the Board.
- Compensation as non-management director consistent with prior disclosed terms.

## SEC filing metadata
- accession: 0001552000-25-000030
- form_type: 8-K
- ticker: MPLX
- cik: 0001552000
- company_name: MPLX LP
- filed_at: 2025-08-25T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1552000/000155200025000030/0001552000-25-000030-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1552000/000155200025000030/mplx-20250825.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001552000-25-000030
- JSON: https://secwatch.observer/filing/0001552000-25-000030.json
- Plain text: https://secwatch.observer/filing/0001552000-25-000030.txt

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