Unitil Corporation is a U.S. electricity and natural gas utility holding company that operates in the states of New Hampshire, Massachusetts, and Maine; the company is also headquartered in New Hampshire. The primary segments of the company are natural gas operations, which includes distribution and interstate gas transmission pipelines, and electric distribution utility operations. The majority of the firm's customers are residential; the company serves commercial and industrial customers as well. Furthermore, the company's revenue generation is fairly evenly split between natural gas and electricity operations.