Earnings Per Share Attributable to Common Stockholders

12 Months Ended

Dec. 31, 2023

Earnings Per Share Attributable to Common Stockholders

9. Earnings Per Share Attributable to Common Stockholders

Basic EPS attributable to common stockholders has been calculated by dividing the net income available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted EPS attributable to common stockholders was

calculated by dividing the net income available to common stockholders by the weighted average number of shares of common stock outstanding, if the potentially dilutive securities had been issued.

Potentially dilutive securities include unvested PSUs, unvested RSUs, outstanding stock options and stock committed under the Employee Stock Purchase Plan ("2023 ESPP"), a plan implemented and approved by the Company on June 15, 2023. The dilutive effect of potentially dilutive securities is reflected in diluted EPS by application of the treasury stock method. Under the treasury stock method, an increase in the fair market value of the Company’s common stock can result in a greater dilutive effect from potentially dilutive securities.


Year ended December 31,	2023		2022		2021
Net income available to common stockholders	$	174.9	$	319.7	$	151.9

Denominator:
Basic weighted average share outstanding	166,963,575		110,781,282		110,315,782
Effect of dilutive securities:
Share units	689,290		516,144		388,083
Stock options and ESPP	551,116		588,599		702,965
Diluted average shares outstanding	168,203,981		111,886,025		111,406,830

Net income per share attributable to common shares:
Basic	$	1.05	$	2.89	$	1.38
Diluted	$	1.04	$	2.86	$	1.36