Income per Share

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



	Three Months Ended March 31,
	2018		2017
Net income available to common stockholders	$	86,298	$	66,145
Weighted average shares outstanding—basic	205,714,173		159,297,027
Potentially dilutive common shares:
Stock options	—		4
Unvested incentive units	302,016		237,336
Forward equity offering	—		283,388
Market performance-based awards	491,287		603,900
Weighted average shares outstanding—diluted	206,507,476		160,421,655
Income per share:
Basic	$	0.42	$	0.42
Diluted	$	0.42	$	0.41

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



	Three Months Ended March 31,
	2018	2017
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	8,295,287	2,177,874
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock	1,967,430	—
Potentially dilutive Series F Cumulative Redeemable Preferred Stock	—	1,783,083
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	2,439,505	2,438,074
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	3,574,840	3,572,744
Potentially dilutive Series I Cumulative Redeemable Preferred Stock	2,442,359	2,440,928
Potentially dilutive Series J Cumulative Redeemable Preferred Stock	1,948,598	—
Total	20,668,019	12,412,703