Unitil Corporation, a public utility holding company, engages in the distribution of electricity and natural gas in the United States. The company operates in Utility Electric Operations, Utility Gas Operations, and Non-Regulated segments. It distributes electricity in the southeastern seacoast and state capital regions of New Hampshire, and the greater Fitchburg area of north central Massachusetts; and distributes natural gas in southeastern New Hampshire, portions of southern Maine to the Lewiston-Auburn area, and in the greater Fitchburg area of north central Massachusetts. The company also operates 86 miles of interstate underground natural gas transmission pipeline that provides interstate natural gas pipeline access and transportation services primarily in Maine and New Hampshire. In addition, it provides energy brokering and advisory services to commercial and industrial customers. The company serves approximately 101,700 electric customers and 73,700 natural gas customers. Unitil Corporation was incorporated in 1984 and is headquartered in Hampton, New Hampshire.