Peiffer Garry L. 4

What Happened
Garry L. Peiffer, a director of MPLX GP LLC (the general partner of MPLX LP), received an award/acquisition of 1,303.501 shares (units) on 2026-05-15. The Form 4 reports the acquisition under transaction code "A" (award/grant) at $0.00 per share, for a reported total value of $0.00.

Key Details

• Transaction date: 2026-05-15; Form 4 filed: 2026-05-19 (filed within required reporting window).
• Shares/units acquired: 1,303.501; price per share: $0.00; total reported value: $0.00.
• Shares owned after transaction: not specified in the provided excerpt.
• Footnote: Holdings are shown "By Garry L. Peiffer Revocable Trust."
• Role/remark: Peiffer is a director of MPLX GP LLC, the general partner; the issuer is managed by directors and executive officers of MPLX GP LLC.

Context
This was an award/grant (likely compensation or equity-based award), not an open-market purchase or sale. Such grants are commonly used for director compensation or retention and do not necessarily signal the director buying shares on the open market. For retail investors, purchases can be a stronger signal of personal conviction than awards, which are often part of routine compensation.