COMMON STOCK AND EARNINGS PER SHARE

Basic earnings per share attributable to Knoll, Inc. stockholders excludes the dilutive effect of (i) common shares that could potentially be issued due to the exercise of stock options, and (ii) unvested restricted stock and restricted stock units, and is computed by dividing net earnings attributable to Knoll, Inc. stockholders by the weighted-average number of common shares outstanding for the period. Diluted earnings per share attributable to Knoll, Inc. stockholders includes the effect of shares and potential shares issued under the stock incentive plans. The following table sets forth the reconciliation from basic to diluted weighted-average number of common shares outstanding:



	Three months ended		Nine months ended
	September 30,	September 30,	September 30,	September 30,
	2015	2014	2015	2014
	(in thousands)		(in thousands)
Weighted-average number of common shares outstanding - basic	47,764	47,377	47,725	47,315
Potentially dilutive shares resulting from stock plans	724	696	716	718
Weighted-average number of common shares outstanding - diluted	48,488	48,073	48,441	48,033
Antidilutive equity awards, number of shares not included in the weighted-average common shares - diluted	—	124	—	144

Common stock activity for the nine months ended September 30, 2015 and 2014 included the repurchase of 345,963 shares for $7.5 million and 388,938 shares for $6.4 million, respectively. Common stock activity for the nine months ended September 30, 2015 also included the exercise of 348,671 stock options for $5.2 million and the vesting of 276,164 restricted shares. Common stock activity for the nine months ended September 30, 2014 included the exercise of 211,057 stock options for $2.8 million and the vesting of 496,191 restricted shares. During the three and nine months ended September 30, 2015, the Company granted 1,136 and 273,560, respectively, equity-based awards to certain employees and the Company's Board of Directors. The vesting of these awards is subject to certain service, performance or market conditions.