Madison Realty Investors LLC

Founded in 1986, Corum Real Estate Group is a real estate firm providing fee management, development and asset services to several clients in the state of Colorado. Based in Denver, Colo., the company manages and owns a number of office, retail, industrial, multifamily and investment properties. It provides corporate office and multiunit residential leasing and property management services for its own properties as well as for property owners. Its multiunit properties range from luxury market loft and apartment rentals in the Denver area to its developments for seasonal and long-term housing in the Colorado resort locations. In addition, the firm also manages commercial properties, including high-rise office suites in Cherry Creek, skyscrapers in downtown Denver and other office building/flex industrial units around the Denver metro area.

MarkWest Energy Partners is engaged in the gathering, transmission and processing of natural gas and the transportation, fractionation and storage of natural gas liquids. The company processes gas from the Appalachian Basin and Michigan. Through several acquisitions completed during 2003 and 2004, the company has also expanded the geographic coverage of its natural gas gathering, processing and transmission to the southwest United States. In addition, one of its acquisitions in Michigan has allowed the company to enter into the crude oil transportation business. MarkWest Energy Partners is a publicly owned company. Its shares are listed on the American Stock Exchange under the ticker symbol MWE. The company is headquartered in Englewood, Colo.