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← US public companies

Mollenkopf John C

SEC-identified person · CIK 1235082 Identifier-verified

Public-company roles (from insider filings)

CompanyCapacity as filedFilings
Antero Resources Midstream Management LLC AMGP Director filed 2019–2026
Antero Resources Midstream LLC AM Director filed 2017–2019
Mplx LP MPLX Exec VP and COO filed 2015–2015
Markwest Energy Partners L P MWE SVP, Chief Opns Officer filed 2006–2015
Markwest Hydrocarbon INC MWP Sr Vice President 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.