UNS Energy Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Effects of Dilutive Common Stock on Weighted-Average Number of Shares

The following table shows the effects of potentially dilutive common stock on the weighted average number of shares:

	Years Ended December 31,
	2012		2011		2010
	-Thousands of Dollars-
Numerator:
Net Income	$	90,919	$	109,975	$	112,984
Income from Assumed Conversion of Convertible Senior Notes		1,100		4,390		4,390
Adjusted Numerator	$	92,019	$	114,365	$	117,374
	-Thousands of Shares-
Denominator:
Weighted Average Shares of Common Stock Outstanding:
Common Shares Issued		40,212		36,780		36,200
Fully Vested Deferred Stock Units		150		129		123
Participating Securities		—		53		92
Total Weighted Average Shares of Common Stock Outstanding and Participating Securities - Basic		40,362		36,962		36,415
Effect of Diluted Securities:
Convertible Senior Notes		1,062		4,281		4,178
Options and Stock Issuable Under Share Based Compensation Plans		331		366		448
Total Shares - Diluted		41,755		41,609		41,041

Number of Stock Options to Purchase Shares of Common Stock Excluded from Computation of Diluted Earning Per Share

The following table shows the number of stock options excluded from the diluted EPS computation because the stock option’s exercise price was greater than the average market price of the Common Stock:

	Years Ended December 31,
	2012		2011		2010
	-Thousands of Shares-
Stock Options Excluded from the Diluted EPS Computation		50		153		212