Earnings per share of QTS Realty Trust, Inc.

3 Months Ended

Mar. 31, 2020

Earnings per Share [Abstract]

Earnings per Share

12. Earnings per share of QTS Realty Trust, Inc.

Basic income per share is calculated by dividing the net income attributable to common shares by the weighted average number of common shares outstanding during the period. Diluted income per share adjusts basic income per share for the effects of potentially dilutive common shares. Unvested restricted stock awards and our forward sale contracts described in Note 9 contain non-forfeitable rights to dividends and thus are participating securities and are included in the computation of basic earnings per share pursuant to the two-class method for all periods presented. The two-class method is an earnings allocation formula that treats a participating security as having rights to undistributed earnings that would otherwise have been available to common stockholders. Accordingly, service-based restricted stock awards and the forward sale contracts were included in the calculation of basic earnings per share using the two-class method for all periods presented to the extent outstanding during the period.

The computation of basic and diluted net income per share is as follows (in thousands, except per share data, and unaudited):

	Three Months Ended
	March 31,
	2020		2019
Numerator:
Net income	$	8,120	$	21,148
Income attributable to noncontrolling interests		(110)		(1,590)
Preferred stock dividends		(7,045)		(7,045)
Earnings attributable to participating securities		(1,596)		(1,935)
Net income (loss) available to common stockholders after allocation to participating securities	$	(631)	$	10,578
Denominator:
Weighted average shares outstanding - basic		58,038		51,948
Effect of Class O units, TSR units and options to purchase Class A common stock on an "as if" converted basis		—		347
Weighted average shares outstanding - diluted		58,038		52,295
Basic net income (loss) per share	$	(0.01)	$	0.20
Diluted net income (loss) per share	$	(0.01)	$	0.20

* Note: The calculations of basic and diluted net income (loss) per share above do not include the following number of Class A partnership units, Class O units, TSR units and options to purchase common stock on an “as if” converted basis, and the effects of Series B Convertible preferred stock on an “as if” converted basis as their respective inclusions would have been antidilutive:

	Three Months Ended
	March 31,
	2020		2019
Class A Partnership units		6,671		6,674
Class O units, TSR units and options to purchase common stock on an "as if" converted basis		655		—
Series B Convertible preferred stock on an "as if" converted basis		6,749		6,729