MarkWest is a master limited partnership engaged in the gathering, transportation, and processing of natural gas and refinery off-gas; the transportation, fractionation, marketing, and storage of natural gas liquids (NGLs); and the gathering and transportation of crude oil. We have extensive natural gas gathering, processing, and transmission operations in the Southwestern and Gulf Coast regions, and we are the largest natural gas processor in the Appalachian region of the United States.

Our primary business strategy is to provide outstanding customer service at competitive rates, maintain financial flexibility, expand operations through organic growth projects and strategic acquisitions, increase utilization of facilities, and reduce the sensitivity of cash flows to commodity price fluctuations. All of these strategies revolve around our focus on sustainable distribution growth for our common unitholders over the long term.

As a result of the redemption and merger with MarkWest Hydrocarbon in February 2008, we extinguished the incentive distribution rights normally associated with a master limited partnership. Elimination of the incentive distribution rights (IDRs) resulted in lower cost of equity capital and immediate accretion to cash available for distribution to common unitholders.

Common units of the partnership are listed on the New York Stock Exchange under the symbol MWE.