MPLX Director Garry Peiffer Receives 1,232-Share Award

What Happened

• Garry L. Peiffer, a director of MPLX GP LLC (the general partner of MPLX LP), received an award of 1,232.166 common units/shares on August 14, 2026. The units were reported as acquired at $0.00 per unit (total reported value $0), indicating a grant/compensation award rather than an open‑market purchase.

Key Details

• Transaction date: 2026-08-14; Filing date: 2026-08-18 (filed within typical 2-business-day Form 4 window).
• Transaction type: A = Award/Grant/Other acquisition; price reported $0.00; quantity 1,232.166 shares.
• Shares owned after transaction: Not specified in the provided filing.
• Footnote: The shares are held by the Garry L. and Kathleen J. Peiffer Trust, created April 24, 2026.
• Role disclosure: Reporting person is a director of MPLX GP LLC, the Issuer’s general partner; MPLX is managed by directors and executive officers of MPLX GP LLC.

Context

• This appears to be a compensation or grant award (common for directors), not a market purchase — such awards are routine and do not by themselves indicate a buy/sell signal. The trust ownership note indicates the units are held in a family trust rather than direct personal brokerage.