MarkWest Energy Partners L.P. - 2012-08-17

Closed on its public offering of 6,900,000 common units at $50.72 per common unit, which includes 900,000 common units purchased pursuant to the full exercise of the underwriters’ option to purchase additional common units. MarkWest intends to use the net proceeds from the offering to fund its capital expenditure program, for general working capital and for other general partnership purposes. Barclays, BofA Merrill Lynch, Citigroup, Goldman, Sachs & Co., UBS Investment Bank, J.P. Morgan and RBC Capital Markets are acting as joint book-running managers for the offering.