Peiffer Garry L. 4

What Happened
Garry L. Peiffer, a director of MPLX GP LLC (the general partner of MPLX LP), was granted 2,246.989 common units/shares on April 30, 2026 as an equity award. The reported acquisition price is $0.00 (award/grant), so no cash was paid by the insider; the reported value on the Form 4 is $0. This is a compensation award rather than an open‑market purchase or sale.

Key Details

• Transaction date: 2026-04-30; Form 4 filed: 2026-05-04 (filing appears timely under Form 4 rules).
• Transaction type/code: A — Grant/award (equity retainer). Price per share reported: $0.00.
• Shares acquired: 2,246.989 units/shares. Reported value on form: $0.
• Shares owned after transaction: not specified in the supplied filing details.
• Footnotes: F1 = represents the reporting person's annual 2026 equity retainer award; F2 = holdings are reported via the Garry L. Peiffer Revocable Trust.
• Remark: Peiffer is a director of MPLX GP LLC; MPLX LP is managed by the directors and executive officers of MPLX GP LLC.

Context
This was an equity compensation grant (retainer) and not a purchase or sale on the open market. Grants like this are routine director compensation and do not, by themselves, indicate a buy/sell signal about the stock.