8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act 1934

Date of Report (Date of earliest event reported): September 22, 2010

UNITIL CORPORATION

(Exact name of registrant as specified in its charter)

New Hampshire	1-8858	02-0381573
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)
6 Liberty Lane West, Hampton, New Hampshire		03842-1720
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (603) 772-0775

N/A

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 4.01 Changes in Registrant’s Certifying Accountant

(i) On July 21, 2010, Unitil Corporation (the “Company”) was notified that effective July 20, 2010, McGladrey & Pullen, LLP (“McGladrey”) acquired certain assets of Caturano and Company, Inc. (formerly Caturano and Company, P.C.), the Company’s independent registered public accounting firm (“Caturano”) and substantially all of the officers and employees of Caturano joined McGladrey. As a result, Caturano resigned as the independent registered public accounting firm for the Company and McGladrey & Pullen LLP was appointed by the Audit Committee of the Company’s Board of Directors as the Company’s new independent registered public accounting firm on September 22, 2010.

(ii) The audit reports of Caturano on the consolidated financial statements of the Company for the years ending December 31, 2009 and 2008 did not contain an adverse opinion or a disclaimer of opinion, and were not qualified or modified to the uncertainty, audit scope or accounting principles.

(iii) During the two most recent fiscal years ended December 31, 2009 and 2008 and through September 22, 2010 there were: (1) no disagreements between the Company and Caturano on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures, which disagreements, if not resolved to the satisfaction of Caturano would have caused them to make reference thereto in their reports on the Company’s financial statements for such years, and (2) no reportable events within the meaning set for in Item 304(a)(1)(v) of Regulation S-K .

(iv) During the Company’s two most recent fiscal years ended December 31, 2009 and 2008 and through September 22, 2010, the Company did not consult with McGladrey on either (1) the application of accounting principles to a specified transaction, either completed or proposed; or the type of audit opinion that may be rendered on the Company’s financial statements, and McGladrey did not provide either a written report or oral advice to the Company that McGladrey concluded was an important factor considered by the Company in reaching a decision as to the accounting, auditing or financial reporting issue; or (2) any matter that was either the subject of a disagreement, as defined in Item 304(a)(1)(iv) of Regulation S-K and the related instructions to Item 304 of Regulation S-K, or a reportable event, as that term is defined in Item 304(a)(1)(v) of Regulation S-K.

(v) The Company has provided Caturano a copy of the disclosures in this Form 8-K and has requested that Caturano furnish it with a letter addressed to the Securities and Exchange Commission stating whether or not it agrees with the Company’s statements in this Item 4.01(a). A copy of the letter dated September 22, 2010 is filed as Exhibit 16.1 to this Form 8-K.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

Number	Exhibit
16.1	Letter regarding change in certifying accountant.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

UNITIL CORPORATION
By:	/S/    MARK H. COLLIN
	Mark H. Collin
	Senior Vice President, Chief Financial Officer and Treasurer

Date: September 22, 2010

EXHIBIT INDEX

Exhibit No.	Description
16.1	Letter regarding change in certifying accountant.

EX-16.1

Exhibit 16.1

September 22, 2010

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549-7561

Commissioners:

We have read the first four paragraphs included in Item 4.01 of Form 8-K of Unitil Corporation dated September 22, 2010, expected to be filed with the Securities and Exchange Commission on September 22, 2010 and are in agreement with the statements concerning our Firm in those paragraphs.

We have no basis to agree or disagree with the other statements included in such Form 8-K.

Very truly yours,

Caturano and Company, Inc.

Boston, Massachusetts