Income per Share

6 Months Ended

Jun. 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 June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Net income available to common stockholders	$	117,055	$	41,510	$	218,783	$	75,696
Weighted average shares outstanding—basic	135,810,060		133,802,622		135,757,584		131,183,857
Potentially dilutive common shares:
Stock options	30,601		45,278		31,402		43,023
Unvested incentive units	68,371		74,345		55,742		65,847
Market performance-based awards	589,972		55,640		416,267		27,820
Weighted average shares outstanding—diluted	136,499,004		133,977,885		136,260,995		131,320,547
Income per share:
Basic	$	0.86	$	0.31	$	1.61	$	0.58
Diluted	$	0.86	$	0.31	$	1.61	$	0.58

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



	Three Months Ended June 30,		Six Months Ended June 30,
	2015	2014	2015	2014
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	2,757,466	2,812,716	2,730,120	2,710,262
Potentially dilutive 2029 Debentures	—	1,121,910	—	3,948,379
Potentially dilutive Series E Cumulative Redeemable Preferred Stock	4,360,736	5,060,744	4,376,813	5,367,507
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	2,765,569	3,209,512	2,775,765	3,404,060
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	3,781,463	4,388,483	3,795,404	4,654,496
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	5,541,340	6,437,332	5,561,769	3,449,841
	19,206,574	23,030,697	19,239,871	23,534,545