MarkWest Energy Partners LP - 2011-01-11

Priced a public offering of 3 million common units at $41.20 per common unit.

MarkWest intends to use the net proceeds of approximately $120.1 million to partially fund its ongoing capital expenditure program, and to fund a portion of the costs associated with the acquisition of certain midstream assets from EQT Gathering LLC.

Morgan Stanley is the sole book-running manager.