Noncontrolling Interests - Operating Partnership (Tables)

9 Months Ended

Sep. 30, 2015

Noncontrolling Interests - Operating Partnership

Schedule of ownership interests in the Operating Partnership

	September 30, 2015			December 31, 2014
	Number of Units	Percentage of Total		Number of Units	Percentage of Total
CoreSite Realty Corporation	26,121,612	55.6	%	21,287,191	45.6	%
Noncontrolling interests	20,860,847	44.4	%	25,360,847	54.4	%
Total	46,982,459	100.0	%	46,648,038	100.0	%