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Net Loss Per Share Attributable to Guardant Health, Inc. Common Stockholders
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Net Loss Per Share Attributable to Guardant Health, Inc. Common Stockholders Net Loss Per Share Attributable to Guardant Health, Inc. Common Stockholders
The following table sets forth the computation of the basic and diluted net loss per share attributable to Guardant Health, Inc. common stockholders:
 
Year Ended December 31,
 
2019
 
2018
 
2017
 
 
 
 
 
 
 
(in thousands, except per share data)
Net loss
$
(67,851
)
 
$
(84,263
)
 
$
(83,221
)
Adjustment of redeemable noncontrolling interest
(7,800
)
 
(800
)
 
—

Net loss attributable to Guardant Health, Inc.
(75,651
)
 
(85,063
)
 
(83,221
)
Deemed dividend related to repurchase of Series A convertible preferred stock
—

 
—

 
(4,716
)
Deemed dividend related to change in conversion rate of Series D convertible preferred stock
—

 
—

 
(1,058
)
Net loss attributable to Guardant Health, Inc. common stockholders, basic and diluted
$
(75,651
)
 
$
(85,063
)
 
$
(88,995
)
Net loss per share attributable to Guardant Health, Inc. common stockholders, basic and diluted
$
(0.84
)
 
$
(2.80
)
 
$
(7.07
)
Weighted-average shares used in computing net loss per share attributable to Guardant Health, Inc. common stockholders, basic and diluted
90,597

 
30,403

 
12,582



Since the Company was in a loss position for all periods presented, basic net loss per share attributable to Guardant Health, Inc. common stockholders is the same as diluted net loss per share attributable to Guardant Health, Inc. common stockholders, as the inclusion of all potential shares of common stock outstanding would have been anti-dilutive. The following weighted-average common stock equivalents were excluded from the calculation of diluted net loss per share attributable to Guardant Health, Inc. common stockholders for the periods presented as they had an anti-dilutive effect:
 
Year Ended December 31,
 
2019
 
2018
 
2017
 
 
 
 
 
 
 
(in thousands)
Convertible preferred stock (on an as if converted basis)
—

 
43,898

 
44,818

Stock options issued and outstanding
5,976

 
7,527

 
5,179

ESPP obligation
52

 
22

 
—

Preferred stock warrants (on an as if converted basis)
—

 
6

 
8

Common stock warrants
—

 
208

 
382

Restricted stock units
252

 
—

 
—

Common stock subject to repurchase
31

 
46

 
28

Total
6,311

 
51,707

 
50,415