CoreSite Realty 10-K 2016 FY Annual report

Exhibit 12.2

Computation of Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends

(in thousands)

	Year Ended December 31,
	2016		2015		2014		2013		2012
Earnings:
Net income	$	81,921	$	56,859	$	40,052	$	31,612	$	10,716
Add: Fixed charges		21,484		15,184		14,639		12,016		10,792
Add: Amortization of capitalized interest		1,936		1,545		1,128		679		369
Less: Capitalized interest		(4,121)		(3,698)		(4,633)		(4,362)		(1,837)
Total earnings	$	101,220	$	69,890	$	51,186	$	39,945	$	20,040
Fixed charges:
Interest expense (including amortization of deferred financing costs)	$	12,612	$	7,104	$	5,311	$	2,689	$	5,236
Capitalized interest		4,121		3,698		4,633		4,362		1,837
Interest within rental expense		4,751		4,382		4,695		4,965		3,719
Total fixed charges		21,484		15,184		14,639		12,016		10,792
Preferred stock dividend requirements		8,338		8,338		8,338		8,338		440
Combined fixed charges and preferred stock dividends	$	29,822	$	23,522	$	22,977	$	20,354	$	11,232
Ratio of earnings to combined fixed charges and preferred stock dividends		3.39		2.97		2.23		1.96		1.78