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Basic and diluted earnings per share
6 Months Ended
Jun. 30, 2022
Basic and diluted earnings per share  
Basic and diluted earnings per share

9Basic and diluted earnings per share

Basic net (loss) / income per ordinary share is computed by dividing net (loss) / income for the period by the weighted average number of ordinary shares outstanding during the period. Diluted earnings per ordinary share are calculated by adjusting the weighted average number of ordinary shares outstanding, assuming conversion of all potentially dilutive ordinary shares. For the three and six months ended June 30, 2021, dilutive net income per ordinary share is computed using the treasury method. As the Company has incurred a loss in the three and six months ended June 30, 2022, all potentially dilutive ordinary shares for these periods would have an antidilutive effect, if converted, and thus have been excluded from the computation of loss per share for the three and six months ended June 30, 2022.

The potentially dilutive ordinary shares are summarized below:

Three months ended June 30, 

Six months ended June 30, 

    

2022

    

2021

2022

2021

(in thousands, except
share amounts)

(in thousands, except
share amounts)

Numerator:

Net (loss) / income attributable to ordinary shares

$

(39,061)

$

399,468

$

(85,739)

$

357,912

(39,061)

399,468

(85,739)

357,912

Denominator:

Weighted-average number of ordinary shares outstanding - basic

46,668,554

46,037,900

46,634,026

45,754,766

Stock options under 2014 Plans and previous plan

797,165

824,101

Non-vested RSUs and PSUs

92,681

98,514

Employee share purchase plan

2,124

1,454

Weighted-average number of ordinary shares outstanding - diluted

46,668,554

46,929,870

46,634,026

46,678,835

The following table presents ordinary share equivalents that were excluded from the calculation of diluted net (loss) / income per ordinary share for the three and six months ended June 30, 2022 and 2021 as the effect of their inclusion would have been anti-dilutive:

Three months ended June 30, 

Six months ended June 30, 

    

2022

    

2021

2022

2021

Anti-dilutive ordinary share equivalents

Stock options under 2014 Plans and previous plan

4,420,474

2,634,766

4,420,474

2,607,830

Non-vested RSUs and PSUs

2,447,570

757,544

2,447,570

751,711

Employee share purchase plan

1,464

1,414

1,464

1,802

Total anti-dilutive ordinary share equivalents

6,869,508

3,393,724

6,869,508

3,361,343

The anti-dilutive ordinary shares are presented without giving effect to the application of the treasury method or exercise prices that exceeded the price of the Company’s ordinary shares as of the three and six months ended June 30, 2022.