Item 7.01 Regulation FD Disclosure

On June 23, 2009, Unitil Corporation ("Unitil" or "Registrant") issued a press release announcing that its underwriters exercised an over-allotment option to purchase an additional 300,000 shares of its common stock. Unitil granted the option to the underwriters in connection with its previously announced public offering of 2,400,000 shares, which priced on May 21, 2009 at a public offering price of $20.00 per share and closed on May 27, 2009. A copy of the press release is attached hereto as Exhibit 99.1.

The net proceeds of approximately $51.2 million (after payment of the underwriting discount, but excluding estimated offering expenses) from this public offering, including the over-allotment, were used (i) to repay the remaining portion outstanding under the bridge credit facility (approximately $39.1 million) that Unitil used to finance the acquisitions of Northern Utilities, Inc. and Granite State Gas Transmission, Inc., which closed on December 1, 2008, and the related costs and expenses and (ii) for other general corporate purposes.

The Common Stock was offered and sold pursuant to shelf registration statements on Form S-3 (File Nos. 333-152823 and 333-158537) filed with the U.S. Securities and Exchange Commission (the "Commission"). The terms of the Common Stock are set forth in the prospectus filed May 21, 2009 with the Commission pursuant to Rule 424(b)(5) under the Securities Act of 1933, as amended.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

Exhibit No. Description
99.1 Press Release dated June 23, 2009.

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