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MPLX LP officer Erin M. Brzezinski, VP and Controller, reported her ownership of the partnership’s common units. The filing shows she holds 4,733 Common Units (Limited Partner Interests) directly. The entry is categorized as a holding, with no reported purchases, sales, or derivative positions.
MPLX LP Senior VP of Logistics & Storage Shawn M. Lyon reported equity compensation and related tax transactions in common units. On March 1, 2026, he acquired 5,986 common units as a grant at $0.00 per unit. On March 2, 2026, he had three F-code tax-withholding dispositions of 920, 1,033, and 798 common units at $59.22 per unit to satisfy tax obligations by delivering units. After these transactions, he directly held 28,289 common units of MPLX LP.
MPLX LP executive vice president and chief financial officer Carl Kristopher Hagedorn reported both an equity award and related tax-withholding transactions in common units. On March 1, 2026, he acquired 4,930 common units as a grant at $0.00 per unit. On March 2, 2026, he disposed of 422, 916, and 663 common units at $59.22 per unit in tax-withholding dispositions. Following these transactions, his direct holdings were reported at 20,409 common units.
MPLX LP executive vice president and COO Gregory Scott Floerke received a grant of 5,986 common units of limited partner interests on March 1, 2026 at a stated price of $59.22 per unit. On March 2, 2026, three tax-withholding dispositions totaling 995, 1,100 and 797 units reduced his directly owned units to 95,337.
MPLX LP is a large master limited partnership that owns midstream energy infrastructure across the U.S., including crude oil and refined product pipelines, marine assets, terminals, storage caverns, and extensive natural gas and NGL gathering, processing and fractionation capacity.
The business is organized into two segments: Crude Oil and Products Logistics and Natural Gas and NGL Services. As of December 31, 2025, Marathon Petroleum Corporation (“MPC”) owned about 64 percent of MPLX’s common units and provided 48 percent of total 2025 revenues and other income, making MPC its key customer and sponsor.
MPLX emphasizes long-term, fee-based contracts with minimum volume commitments, cost discipline, and returning capital to unitholders. Recent actions include declaring a $1.0765 per-unit distribution and issuing $1.0 billion of 5.30 percent senior notes due 2036 and $500 million of 6.10 percent senior notes due 2056.
MPLX LP director Ray N. Walker Jr. reported an equity award of 32.127 common units of limited partner interests on February 17, 2026. The units were granted at a price of $0.00 per unit as a grant/award acquisition, not an open-market purchase. After this award, his directly held stake increased to 1,743.699 common units.
MPLX LP director John P. Surma received an award of 1,505.132 common units on February 17, 2026. The units, representing limited partner interests, were acquired as a grant at a stated price of $0.0000 per unit. After this award, his directly held units total 89,190.259.
MPLX LP director J. Michael Stice received an equity grant of common units. He was awarded 981.957 common units (limited partner interests) of MPLX LP on February 17, 2026, recorded as a grant or other acquisition with no cash price shown per unit.
After this grant, Stice directly holds 53,295.154 common units. In addition, 700 common units are held indirectly through The Mike Stice Trust, reflecting a separate indirect ownership position rather than a new transaction.
MPLX LP director Frank M. Semple reported an equity award of common units. On February 17, 2026, he acquired 1,071.818 common units of MPLX LP as a grant, bringing his directly held units to 58,172.334. Additional common units are reported as indirectly held through several trusts and an LLC.
MPLX LP director Garry L. Peiffer reported an acquisition of common units through an equity award. On February 17, 2026, he received 1,180.524 Common Units (Limited Partner Interests) at a price of $0.0000 per unit, described as a grant or award acquisition.
Following this transaction, Peiffer directly owned 64,072.343 common units. In addition, a revocable trust identified as the Garry L. Peiffer Revocable Trust held an indirect position of 68,497.000 common units, reflecting his beneficial ownership through that trust.