WGL Holdings, Inc. (WGL Holdings) is a holding company. The Company own subsidiaries, which sells and delivers natural gas and/or provide a range of energy-related products and services to customers in the District of Columbia and the surrounding metropolitan areas in Maryland and Virginia. The Company operates in four segments: Regulated Utility, Retail Energy-Marketing, Commercial Energy Systems and Midstream Energy Services. The Company�s wholly owned subsidiaries include Washington Gas Light Company (Washington Gas), Washington Gas Resources Corporation (Washington Gas Resources), Hampshire Gas Company (Hampshire) and Crab Run Gas Company. Washington Gas Resources owns all of the shares of common stock of four non-utility subsidiaries that include Washington Gas Energy Services, Inc. (WGEServices), Washington Gas Energy Systems, Inc. (WGESystems), WGL Midstream and WGSW, Inc. (WGSW).