MarkWest Energy Partners LP - 2012-03-13

Priced a public offering of 5.9 million common units at $59.54 per common unit. MarkWest has granted the underwriters a 30-day option to purchase up to 885,000 additional common units to cover the underwriters’ sale of additional common units, if any. MarkWest intends to use the net proceeds from the offering, after deducting underwriting discounts, commissions and offering expenses, of approximately $337.4 million, as well as any exercise of the underwriters’ option to partially fund its ongoing capex program. BofA Merrill Lynch, Barclays Capital, Citigroup, Morgan Stanley, UBS Investment Bank and Wells Fargo Securities are acting as joint book-running managers for the offering.