Unitil Completes Purchase of Two Water Companies in New Hampshire from the Aquarion Water Authority June 30

HAMPTON — Unitil Corporation (NYSE:UTL) (“Unitil” or the “Company”) (unitil.com) announced June 30 that it completed the purchase of Aquarion Water Company of New Hampshire, Inc. and Abenaki Water Co., Inc. (the “Aquarion Companies”) from the Aquarion Water Authority (“AWA”). The Stock Purchase Agreement (the “Agreement”) between Unitil and the AWA was first announced on May 6, 2025 and subsequently amended, including to limit Unitil’s purchase to the two Aquarion Companies. All conditions of the Agreement, as amended, including the receipt of approvals from the New Hampshire and Maine Public Utilities Commissions, were materially completed as of the closing date.

The water systems of the Aquarion Companies include approximately 150 miles of water distribution mains and serve approximately 11,000 customers in eight communities in New Hampshire. The Aquarion Companies’ rate base is estimated to be approximately $47.0 million as of December 31, 2025. With this acquisition, Unitil serves approximately 226,100 customers throughout New Hampshire, Maine, and Massachusetts. The acquisition of the Aquarion Companies is expected to be earnings accretive over the long-term, supporting Unitil’s long-term earnings per share growth of 5% to 7%.

“The acquisition of the Aquarion Companies represents a unique opportunity for Unitil to expand into a complementary regulated utility service within a state we already serve,” said Thomas P. Meissner Jr., Unitil’s Chairman and Chief Executive Officer. “We are excited to welcome the Aquarion Companies’ experienced, locally managed teams and remain committed to delivering the high-quality service that customers and communities across New Hampshire have come to expect.”

The purchase price was $55.8 million, including the assumption of approximately $13.7 million of debt, plus approximately $0.6 million for estimated working capital and reimbursable capital expenditures. Unitil funded the purchase price through a term loan from Scotiabank.

Unitil was advised in this transaction by Scotiabank, and by the law firm of Dentons.

About Unitil Corporation

Unitil Corporation provides energy for life by safely and reliably delivering electricity, natural gas, and water in New England. We are committed to the communities we serve and to developing people, business practices, and technologies that lead to the dependable, efficient delivery of energy and water. Unitil Corporation is a public utility holding company with operations in New Hampshire, Maine, and Massachusetts. Unitil’s operating utilities, including the Aquarion Companies, serve approximately 110,100 electric customers, 105,000 natural gas customers, and 11,000 water customers. For more information about our people, technologies, and community involvement, please visit unitil.com.