Company · CIK 0001552000 · SIC 4610 — Pipe Lines (No Natural Gas) · NYSE

MPLX LP · MPLX

Insider activity reported against this company. All insider holders · On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Reported at this company — common stock

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake
Aug 14, 2026 AForm 4 →	Aug 18, 5:31 pm EDT	Garry L. PeifferDirector	1,232	—	—	69,313	—
Aug 14, 2026 AForm 4 →	Aug 18, 4:52 pm EDT	Ray N Walker Jr.Director	82	—	—	4,609	—
Aug 14, 2026 AForm 4 →	Aug 18, 4:49 pm EDT	John P SurmaDirector	1,563	—	—	95,448	—
Aug 14, 2026 AForm 4 →	Aug 18, 4:46 pm EDT	J Michael SticeDirector	983	—	—	58,413	—
Aug 14, 2026 AForm 4 →	Aug 18, 4:43 pm EDT	Frank M SempleDirector	1,073	—	—	63,476	—
Aug 14, 2026 AForm 4 →	Aug 18, 4:41 pm EDT	Christopher A HelmsDirector	1,337	—	—	86,208	—
Aug 14, 2026 AForm 4 →	Aug 18, 4:38 pm EDT	Christine S BrevesDirector	219	—	—	15,038	—
Apr 30, 2026 AForm 4/A →	Aug 5, 4:22 pm EDT	Ray N Walker Jr.Director	2,696	—	—	4,440	—
Apr 30, 2026 AForm 4/A →	Aug 5, 4:21 pm EDT	John P SurmaDirector	3,029	—	—	92,219	—
Apr 30, 2026 AForm 4/A →	Aug 5, 4:19 pm EDT	J Michael SticeDirector	3,029	—	—	56,324	—
Apr 30, 2026 AForm 4/A →	Aug 5, 4:17 pm EDT	Frank M SempleDirector	3,029	—	—	61,201	—
Apr 30, 2026 AForm 4/A →	Aug 5, 4:15 pm EDT	Garry L. PeifferDirector	2,696	—	—	66,769	—
Apr 30, 2026 AForm 4/A →	Aug 5, 4:12 pm EDT	Christopher A HelmsDirector	2,696	—	—	83,447	—
Apr 30, 2026 AForm 4/A →	Aug 5, 4:07 pm EDT	Christine S BrevesDirector	2,696	—	—	14,534	—

No reported derivative activity in this period.