Equity (Tables)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Summarizes the Aggregate Number of Stock Options And Restricted Stock Unit

The following table summarizes the aggregate number of stock options and restricted stock units, or RSUs, outstanding under the Amarin Corporation plc 2020 Stock Incentive Plan, or the 2020 Plan, as of March 31, 2023:

	March 31, 2023
Outstanding stock options		19,638,850
% of outstanding shares on a fully-diluted basis		4	%
Outstanding RSUs		18,203,692
% of outstanding shares on a fully-diluted basis		4	%

Summary of Equity Awards Activity

The following table represents equity awards activity during the three months ended March 31, 2023 and 2022:

	Three months ended March 31,
	2023		2022
Common shares issued for stock option exercises		1,232,263		10,602
Gross and net proceeds from stock option exercises	$	1,871,758	$	30,000
Common shares issued in settlement of vested RSUs		2,270,674		493,381
Shares retained for settlement of employee tax obligations ─ RSUs		716,438		161,083
Common shares issued in settlement of vested Performance-based RSUs (1)		244,274		—
Shares retained for settlement of employee tax obligations ─ Performance-based RSUs		111,085		—

Performance-based RSUs vested in connection with the achievement of certain sales performance conditions on February 21, 2023. These performance-based RSUs will vest over a three-year period based on continuous service from the grant date.