Thursday, July 16, 2015
Marathon Petroleum Corp. (MPC; Findlay, Ohio) said July 13 that its midstream master limited partnership, MPLX LP, had signed a merger agreement with MarkWest Energy Partners LP (Denver) whereby MarkWest would become a wholly owned subsidiary of MPLX. The merger would be a unit-for-unit transaction, generally expected to be tax-free, plus a one-time cash payment to MarkWest unit holders. The deal is valued at about $20 billion, including assumption of debt of about $4.2 billion.