Income per Share (Tables)

9 Months Ended

Sep. 30, 2015

The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net income available to common stockholders	$	38,522	$	109,314	$	257,305	$	185,010
Weighted average shares outstanding—basic	135,832,503		135,492,618		135,782,831		132,635,894
Potentially dilutive common shares:
Stock options	19,983		52,629		20,629		46,649
Unvested incentive units	86,190		129,024		65,752		61,122
Series I Cumulative Redeemable Preferred Stock	1,703,182		—		567,727		—
Market performance-based awards	618,078		272,262		483,538		109,301
Weighted average shares outstanding—diluted	138,259,936		135,946,533		136,920,477		132,852,966
Income per share:
Basic	$	0.28	$	0.81	$	1.89	$	1.39
Diluted	$	0.28	$	0.80	$	1.88	$	1.39

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:



	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,635,444	2,815,512	2,698,215	2,745,730
Potentially dilutive 2029 Debentures	—	—	—	2,617,790
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	4,567,661	4,673,322	4,440,429	5,136,112
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	2,896,800	2,963,810	2,816,110	3,257,310
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	3,960,900	4,052,525	3,850,569	4,453,839
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	5,804,286	5,938,553	5,642,608	4,111,306
Shares subject to Forward Equity Offering	10,500,000	—	10,500,000	—
	30,365,091	20,443,722	29,947,931	22,322,087