Income per Unit

12 Months Ended

Dec. 31, 2017

Digital Realty Trust, L.P.

Class of Stock [Line Items]

Income per Unit

Income per Unit

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

	Year Ended December 31,
	2017		2016		2015
Net income available to common unitholders	$	176,918	$	337,386	$	220,343
Weighted average units outstanding—basic	178,055,936		152,359,680		140,905,897
Potentially dilutive common units:
Stock options	—		9,726		20,424
Unvested incentive units	141,136		71,031		95,746
Forward equity offering	124,527		3,990		—
Market performance-based awards	570,049		641,279		501,645
Weighted average units outstanding—diluted	178,891,648		153,085,706		141,523,712
Income per unit:
Basic	$	0.99	$	2.21	$	1.56
Diluted	$	0.99	$	2.20	$	1.55

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

	Year Ended December 31,
	2017	2016	2015
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Units	540,773	—	—
Potentially dilutive Series E Cumulative Redeemable Preferred Units	—	2,880,254	4,301,438
Potentially dilutive Series F Cumulative Redeemable Preferred Units	463,301	1,939,905	2,727,962
Potentially dilutive Series G Cumulative Redeemable Preferred Units	2,261,153	2,652,503	3,730,042
Potentially dilutive Series H Cumulative Redeemable Preferred Units	3,313,484	3,886,966	5,465,987
Potentially dilutive Series I Cumulative Redeemable Preferred Units	2,263,799	2,655,607	1,235,063
Potentially dilutive Series J Cumulative Redeemable Preferred Units	720,803	—	—
	9,563,313	14,015,235	17,460,492