EXHIBIT 11

UNITIL CORPORATION AND SUBSIDIARY COMPANIES

COMPUTATION OF EARNINGS PER WEIGHTED AVERAGE COMMON SHARE OUTSTANDING

(Millions except common shares and per share data)

(UNAUDITED)

	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013		2012
Net Income (Loss)	$	(0.1	)	$	(0.3	)	$	10.7	$	8.7
Less: Dividend Requirements on Preferred Stock		—			0.1			—		0.1
Net Income Applicable to Common Stock	$	(0.1	)	$	(0.4	)	$	10.7	$	8.6
Weighted Average Number of Common Shares Outstanding – Basic (000’s)		13,768			12,331			13,758		11,624
Dilutive Effect of Stock Options and Restricted Stock (000’s)		—			—			2		3
Weighted Average Number of Common Shares Outstanding – Diluted (000’s)		13,768			12,331			13,760		11,627
Earnings Per Share – Basic and Diluted	$	(0.01	)	$	(0.03	)	$	0.78	$	0.74