ONEOK, Inc., is a diversified energy company. The Company's segments include ONEOK Partners, Natural Gas Distribution and Energy Services. As of December 31, 2012, the Company was the sole general partner and own 43.4 % of ONEOK Partners, L.P. ONEOK Partners is engaged in the gathering, processing, storage and transportation of natural gas in the United States. In addition, ONEOK Partners owns natural gas liquids systems, connecting natural gas liquids (NGL) supply in the Mid-Continent and Rocky Mountain regions with key market centers. The Company's distribution markets include Oklahoma City and Tulsa, Oklahoma; Kansas City, Wichita, and Topeka, Kansas, and Austin and El Paso, Texas. Its energy services operation is engaged in providing natural gas marketing services to its customers across the United States.