MPLX, MarkWest complete combine, make executive appointments

MPLX LP, a Findlay, Ohio-based master limited partnership formed by Marathon Petroleum Corp. in 2012, and MarkWest Energy Partners LP of Denver have completed their previously announced $15.8-billion merger by which MarkWest became a wholly owned subsidiary of MPLX (OGJ Online, July 13, 2015).

Effective of the deal’s close, Frank M. Semple was named vice-chairman of MPLX’s general partner and has been elected to its board. Semple previously served as MarkWest’s chairman, president, and chief executive officer.

Separately, John C. Mollenkopf was named executive vice-president and chief operating officer, MarkWest assets, of MPLX’s general partner. Mollenkopf previously served as MarkWest’s executive vice-president and chief operating officer.

As of this morning, MarkWest ceased to be a publicly traded partnership and its common units discontinued trading on the New York Stock Exchange.

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