CoreSite Realty 10-K 2017 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,
	2017		2016		2015		2014		2013
Earnings:
Net income	$	100,491	$	81,921	$	56,859	$	40,052	$	31,612
Add: Fixed charges		32,315		21,484		15,184		14,639		12,016
Add: Amortization of capitalized interest		2,306		1,936		1,545		1,128		679
Less: Capitalized interest		(3,282)		(4,121)		(3,698)		(4,633)		(4,362)
Total earnings	$	131,830	$	101,220	$	69,890	$	51,186	$	39,945
Fixed charges:
Interest expense (including amortization of deferred financing costs)	$	24,147	$	12,612	$	7,104	$	5,311	$	2,689
Capitalized interest		3,282		4,121		3,698		4,633		4,362
Interest within rental expense		4,886		4,751		4,382		4,695		4,965
Total fixed charges		32,315		21,484		15,184		14,639		12,016
Preferred stock dividend requirements		7,924		8,338		8,338		8,338		8,338
Combined fixed charges and preferred stock dividends	$	40,239	$	29,822	$	23,522	$	22,977	$	20,354
Ratio of earnings to combined fixed charges and preferred stock dividends		3.28		3.39		2.97		2.23		1.96