David A. Cerotzke

Energy West, Inc. engages in the distribution and sale of natural gas to residential, commercial, and transportation customers through its subsidiaries. It distributes approximately 26 billion cubic feet of natural gas to approximately 37,000 customers through regulated utilities operating in and around Great Falls and West Yellowstone, Montana; Cody, Wyoming; Bangor, Maine; and Elkin, North Carolina. The company also markets approximately 2.3 billion cubic feet of natural gas to commercial and industrial customers in Montana and Wyoming, and manages midstream supply and production assets for transportation customers and utilities. It has an ownership interest in 160 natural gas producing wells and gas gathering assets. The company was founded in 1909 and is headquartered in Great Falls, MT.

Nicor, Inc. provides natural gas distribution services and international shipping services. The company operates through three segments Gas Distribution, Shipping and Wholesale Marketing. Nicor was founded in 1976 and is headquartered in Naperville, IL.

Hearthstone Utilities, Inc. is a holding company. The firm distributes and sells natural gas to end-use residential, commercial, and industrial customers. Its other operations include natural gas production and natural gas marketing. The company was founded in 1909 and is headquartered in Naperville, IL.

GEP Bison Holdings, Inc. provides oil and gas exploration services. The company is headquartered in Greenwich, CT.