SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Brock Laurence M (Last) (First) (Middle) 6 LIBERTY LANE WEST (Street) HAMPTON NH 03842 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 06/17/2005	3. Issuer Name and Ticker or Trading Symbol UNITIL CORP [ UTL ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Controller & C.A.O.	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock, no par value	924.469	D
Common Stock, no par value	727	I	held in trust(1)
Common Stock, no par value	2,000	I	held in trust(2)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Common Stock, no par value	03/05/2002	03/05/2009	03/05/2005	1,500(3)	23.375	D
Common Stock, no par value	01/17/2003	01/17/2010	01/17/2003	1,500(4)	32.125	D
Common Stock, no par value	01/16/2004	01/16/2011	01/16/2004	1,500(5)	25.875	D

Explanation of Responses:

1. Shares are held in trust under the terms of the Unitil Corporation Tax Deffered Savings and Investment Plan.

2. Shares are held in the Brock Family Trust

3. Options were granted March 5, 1999 under the terms and conditions of the Company's 1998 Stock Option Plan.

4. Options were granted January 17, 2000 under the terms and conditions of the Company's 1998 Stock Option Plan

5. Options were granted January 16, 2001 under the terms and conditions of the Company's 1998 Stock Option Plan

	/s/ Laurence M. Brock	06/22/2005
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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