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← US public companies

Semple Frank M

SEC-identified person · CIK 1270065 Identifier-verified

Public-company roles (from insider filings)

CompanyCapacity as filedFilings
Mplx LP MPLX Director · Vice Chairman filed 2015–2026
Marathon Petroleum Corp MPC Director filed 2015–2026
Tortoise Acquisition Corp. SHLL Director filed 2019–2020
Tesoro Logistics LP TLLP Director filed 2018–2019
Markwest Energy Partners L P MWE Director · President, CEO filed 2006–2015
Markwest Hydrocarbon INC MWP Director · President, CEO filed 2006–2008

All roles under one Commission-assigned identifier - the same person by the SEC's own record, not by name matching. From the SEC's insider-transaction filings (Forms 3, 4 and 5). Every reporting director and officer carries a Commission-assigned identifier (CIK), so these footprints are identifier-verified - no name matching involved. Insiders file when they transact, so dates are filing dates: "last filed" never means "served until". This layer is not yet joined to the nonprofit register - identity joins ship only after independent review.