Equity (Tables)

9 Months Ended

Sep. 30, 2025

Equity [Abstract]

Summarizes the Aggregate Number of Stock Options And Restricted Stock Unit

The following table summarizes the aggregate number of Ordinary Shares underlying stock options and RSUs outstanding under the Amarin Corporation plc 2020 Stock Incentive Plan, as amended, or the 2020 Plan, as of September 30, 2025:

	September 30, 2025
Outstanding stock options		30,768,706
% of outstanding on a fully-diluted basis		7	%
Outstanding RSUs		14,726,029
% of outstanding on a fully-diluted basis		4	%

Summary of Euity Awards Activity

The following table represents equity awards activity during the nine months ended September 30, 2025 and 2024:

	Nine months ended September 30,
	2025		2024
Ordinary Shares issued for stock option exercises		—		9,500
Gross and net proceeds from stock option exercises	$	—	$	10,260
Ordinary Shares issued in settlement of vested RSUs		7,083,019		3,218,757
Ordinary Shares retained for settlement of employee tax obligations ─ RSUs		2,939,015		1,188,171
Ordinary Shares issued in settlement of vested Performance-based RSUs (1)		257,500		484,897
Ordinary Shares retained for settlement of employee tax obligations ─ Performance-based RSUs		117,898		227,380

(1)Performance-based RSUs vested in connection with the achievement of certain performance conditions during the year.