Income per Share

12 Months Ended

Dec. 31, 2020

Income per Share

Income per Share

10. Income per Share

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

	Year Ended December 31,
	2020		2019		2018
Net income available to common stockholders	$	263,342	$	493,011	$	249,930
Weighted average shares outstanding—basic		260,098,978		208,325,823		206,035,408
Potentially dilutive common shares:
Unvested incentive units		120,775		165,185		141,260
Unvested restricted stock		177,244		—		—
Forward equity offering		1,596,476		813,073		33,315
Market performance-based awards		529,035		158,166		463,488
Weighted average shares outstanding—diluted		262,522,508		209,462,247		206,673,471
Income per share:
Basic	$	1.01	$	2.37	$	1.21
Diluted	$	1.00	$	2.35	$	1.21

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

	Year Ended December 31,
	2020	2019	2018
Weighted average of Operating Partnership common units not owned by Digital Realty Trust, Inc.	7,974,005	8,958,932	8,227,463
Potentially dilutive Series C Cumulative Redeemable Perpetual Preferred Stock	1,489,983	1,695,765	1,876,584
Potentially dilutive Series G Cumulative Redeemable Preferred Stock	1,452,809	2,102,655	2,326,861
Potentially dilutive Series H Cumulative Redeemable Preferred Stock	—	789,846	3,409,772
Potentially dilutive Series I Cumulative Redeemable Preferred Stock	1,269,035	2,105,116	2,329,584
Potentially dilutive Series J Cumulative Redeemable Preferred Stock	1,475,721	1,679,534	1,858,622
Potentially dilutive Series K Cumulative Redeemable Preferred Stock	1,551,801	1,334,691	—
Potentially dilutive Series L Cumulative Redeemable Preferred Stock	2,543,639	670,823	—
Total	17,756,993	19,337,362	20,028,886