UNITIL (UTL)

NORTHERN AND GRANITE PROFILES

Northern, a subsidiary of Bay State Gas Company and ultimately of NiSource, is a local gas distribution utility serving customers in Maine and New Hampshire. Northern provides natural gas distribution services to 52,000 customers in 44 New Hampshire and southern Maine communities, stretching from Plaistow, New Hampshire, in the south, to Lewiston-Auburn in the north. Northern traces its history to the founding of Portland Gas Light Company in 1849. In 1979, Northern became part of the Bay State Gas Company, which NiSource acquired in 1999.

Granite is a FERC-regulated natural gas transmission pipeline incorporated in New Hampshire that operates 86 miles of underground natural gas pipeline primarily in Maine and New Hampshire. Granite provides Northern with interconnection to three major natural gas pipelines and access to domestic natural gas supplies in the south and Canadian natural gas supplies in the north. Granite derives its revenues principally from the services provided to Northern.

Additional Information and Where to Find It

In connection with the financing for the proposed transaction, the Company will file a proxy statement with the Securities and Exchange Commission. Before making any voting or investment decision, investors and security holders of the Company are urged to carefully read the entire proxy statement, when it becomes available, and any other relevant documents filed with the Securities and Exchange Commission, as well as any amendments or supplements to those documents, because they will contain important information about the proposed transaction. A definitive proxy statement will be sent to the stockholders of the Company in connection with the financing for the proposed transaction. Investors and security holders may obtain a free copy of the proxy statement (when available) and other documents filed by the Company at the Securities and Exchange Commission’s Web site at http://www.sec.gov. The proxy statement and such other documents may also be obtained for free from the Company by directing such request to the Company, at: Unitil Corporation, 6 Liberty Lane West, Hampton, NH 03842-1720, the Investor page at www.unitil.com, or toll-free 800-999-6501.

Participants in the Solicitation

The Company, its directors, executive officers and other members of its management, employees, and certain other persons may be deemed to be participants in the solicitation of proxies from the Company stockholders in connection with the financing for the proposed transaction. Information about the interests of the Company’s participants in the solicitation is set forth in the Company’s proxy statements and Annual Reports on Form 10-K, filed with the Securities and Exchange Commission.