Income Per Unit (Digital Realty Trust, L.P. [Member])

3 Months Ended

Mar. 31, 2013

Digital Realty Trust, L.P. [Member]

Income Per Unit

8. Income per Unit

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

	Three Months Ended March 31,
	2013	2012
Net income available to common unitholders	$            43,481	$            40,797
Weighted average units outstanding--basic	128,888,041	111,432,822
Potentially dilutive common units:
Stock options	70,877	205,830
Class C Units (2007 Grant)	-	16,358
Unvested incentive units	222,177	262,812
Weighted average units outstanding--diluted	129,181,095	111,917,822
Income per unit:
Basic	$                0.34	$                0.37
Diluted	$                0.34	$                0.36

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,
	2013	2012
Potentially dilutive 2029 Debentures	6,590,470	6,442,085
Potentially dilutive Series C Cumulative Convertible    Preferred Units	-	2,784,845
Potentially dilutive Series D Cumulative Convertible    Preferred Units	1,909,146	4,337,429
Potentially dilutive Series E Cumulative Redeemable     Preferred Units	4,381,703	4,025,863
Potentially dilutive Series F Cumulative Redeemable    Preferred Units	2,778,866	-
	15,660,185	17,590,222