Income per Share

3 Months Ended

Mar. 31, 2016

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



	Three Months Ended March 31,
	2016		2015
Net income available to common stockholders	$	39,125	$	101,728
Weighted average shares outstanding—basic	146,565,564		135,704,525
Potentially dilutive common shares:
Stock options	11,286		33,839
Unvested incentive units	122,601		147,874
Market performance-based awards	733,743		242,562
Weighted average shares outstanding—diluted	147,433,194		136,128,800
Income per share:
Basic	$	0.27	$	0.75
Diluted	$	0.27	$	0.75

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



	Three Months Ended March 31,
	2016	2015
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,482,234	2,702,468
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	3,345,087	4,392,889
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	2,121,447	2,785,960
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	2,900,732	3,809,345
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	4,250,720	5,582,197
Potentially dilutive Series I Cumulative Redeemable Preferred Stock	2,904,126	—
	18,004,346	19,272,859