UNITIL CORPORATION

UNITIL CORPORATION is a public utility holding company incorporated in New Hampshire in 1984. Its principal business involves the local distribution of electricity and natural gas to approximately 215,100 customers across New Hampshire, Massachusetts, and Maine. Unitil operates through several wholly-owned subsidiaries. Unitil Energy Systems, Inc., organized in New Hampshire in 1901, is an electric distribution utility. Fitchburg Gas and Electric Light Company, organized in Massachusetts in 1852, is an electric and natural gas distribution utility. Northern Utilities, Inc., organized in New Hampshire in 1979, Bangor Natural Gas Company, organized in Maine in 1998, and Maine Natural Gas Corporation, organized in Maine in 1998, are all natural gas distribution utilities. Granite State Gas Transmission, Inc., organized in New Hampshire in 1955, operates a natural gas transmission pipeline. Unitil Power Corp., organized in New Hampshire in 1984, is a wholesale electric power utility. Unitil Service Corp., organized in New Hampshire in 1984, is a utility service company. Unitil Realty Corp., organized in New Hampshire in 1986, manages real estate. Unitil Resources, Inc., organized in New Hampshire in 1993, provides non-regulated energy services. Unitil Water Corp., organized in New Hampshire in 2025, is a non-regulated company. Unitil and its subsidiaries are regulated by the Federal Energy Regulatory Commission (FERC) as a holding company system.