The following summarizes Common Stock activity for each of the years ended December 31, 2014, 2015 and 2016 (in thousands):



	Common Shares
	Issued	Treasury		Outstanding

Balance at December 31, 2013	546,378	(206	)	546,172
Common Stock Issued Under Stock-Based Compensation Plans	2,448	—		2,448
Treasury Stock Purchased ⁽¹⁾	—	(1,209	)	(1,209	)
Common Stock Issued Under Employee Stock Purchase Plan	202	—		202
Treasury Stock Issued Under Stock-Based Compensation Plans	—	682		682
Balance at December 31, 2014	549,028	(733	)	548,295
Common Stock Issued Under Stock-Based Compensation Plans	1,019	—		1,019
Treasury Stock Purchased ⁽¹⁾	—	(581	)	(581	)
Common Stock Issued Under Employee Stock Purchase Plan	104	121		225
Treasury Stock Issued Under Stock-Based Compensation Plans	—	901		901
Balance at December 31, 2015	550,151	(292	)	549,859
Common Stock Issued	25,204	—		25,204
Common Stock Issued Under Stock-Based Compensation Plans	1,500	—		1,500
Treasury Stock Purchased ⁽¹⁾	—	(922	)	(922	)
Common Stock Issued Under Employee Stock Purchase Plan	95	117		212
Treasury Stock Issued Under Stock-Based Compensation Plans	—	847		847
Balance at December 31, 2016	576,950	(250	)	576,700


(1)	Represents shares that were withheld by or returned to EOG (i) in satisfaction of tax withholding obligations that arose upon the exercise of employee stock options or SARs or the vesting of restricted stock, restricted stock unit, performance stock or performance unit grants or (ii) in payment of the exercise price of employee stock options.