Earnings per Share

12 Months Ended

Dec. 31, 2022

We compute basic earnings per share by dividing net income attributable to Core Laboratories N.V. by the number of weighted average common shares outstanding during the period. Diluted earnings per share includes the incremental effect of

contingently issuable shares from performance and restricted stock awards, as determined using the treasury stock method. The following table summarizes the calculation of weighted average common shares outstanding used in the computation of basic and diluted earnings per share (in thousands):


	For the Years Ended December 31,
	2022		2021		2020
Weighted average common shares outstanding - basic		46,334		46,009		44,477
Effect of dilutive securities:
Restricted shares		71		139		—
Performance shares		408		542		—
Weighted average common shares outstanding - assuming dilution		46,813		46,690		44,477

For the year ended December 31, 2020, the number of outstanding performance shares and restricted shares of Core Laboratories N.V. common stock that were excluded from diluted earnings per share calculation, as their impact would be antidilutive, were as follows (in thousands):


	December 31, 2020
Performance shares		308
Restricted shares		189