AMARIN CORP PLC\UK — Director's Dealing 2025

Apr 22, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2025-04-18

Reporting Person: O'Connor Oliver (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-04-18	American Depositary Shares	M	838	—	Acquired	838	Direct
2025-04-18	American Depositary Shares	F	437	$9.11	Disposed	401	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-04-18	Restricted Stock Unit	$0	M	838	Acquired		American Depositary Shares (838)	Direct

Footnotes

F1: Effective April 11, 2025, the Issuer implemented a ratio change that one (1) American Depositary Share ("ADS") currently represents twenty (20) Ordinary Shares ("ADS Ratio Change"). Proportionate adjustments were made to the Issuer's outstanding equity awards. The amount of securities reported on this Form 4 reflect the ADS Ratio Change.

F2: On April 18, 2024, following the conclusion of the Issuer's annual general meeting of shareholders for 2024, the Reporting Person was granted an award that vests in three equal installments on each of April 18, 2025, April 18, 2026 and April 18, 2027

F3: Not applicable

F4: Represents withholding by the Issuer of shares in respect of tax liability incident to the vesting of a security issued in accordance with Rule 16b-3, and not a market sale of securities.

F5: Each RSU represents a contingent right to receive twenty Ordinary Shares or cash in lieu thereof at the Issuer's discretion.