National Fuel Gas Company is a holding company. The Company is an energy company engaged in the production, gathering, transportation, distribution and marketing of natural gas. The Company operates through five segments: Exploration and Production, including operations carried out through its subsidiary, Seneca Resources Corporation; Pipeline and Storage, including operations carried out through its subsidiaries, National Fuel Gas Supply Corporation and Empire Pipeline, Inc.; Gathering, including operations carried out through subsidiaries of National Fuel Gas Midstream Corporation; Utility, including operations are carried out by through its subsidiary, Distribution Corporation, and Energy Marketing, including operations carried out through its subsidiary, National Fuel Resources, Inc. The Company operates an integrated business, with assets centered in western New York and Pennsylvania. The Company also develops and produces oil reserves, primarily in California.