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100 West Fifth Street Tulsa OK 74103 United States

ONEOK, headquartered in Tulsa, Okla., is one of the nation’s premier energy companies involved in the natural gas and natural gas liquids businesses. ONEOK is the sole general partner and 43.4 percent owner of ONEOK Partners, L.P., a publicly traded limited partnership engaged in natural gas gathering and processing, natural gas pipelines and natural gas liquids. The partnership’s interstate natural gas pipelines assets transport natural gas through FERC-regulated interstate natural gas pipelines in Montana, North Dakota, South Dakota, Minnesota, Wisconsin, Iowa, Illinois, Indiana, Kentucky, Tennessee, Oklahoma, Texas and New Mexico. ONEOK Partners operates approximately 1,500 miles of FERC-regulated interstate natural gas pipelines with approximately 3.1 billion cubic feet per day (Bcf/d) of peak transportation capacity.