AMARIN CORP PLC\UK — Director's Dealing 2023

Jan 4, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2022-12-30

Reporting Person: Ketchum Steven B (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-12-30	Ordinary Shares	M	47767.00	—	Acquired	560382.00	Direct
2022-12-30	Ordinary Shares	F	16361.00	$1.21	Disposed	544021.00	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2022-12-30	Restricted Stock Units	$0.00	M	47767.00	Disposed		Ordinary Shares (47767.00)	Direct

Footnotes

F1: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

F2: On January 4, 2021, the Reporting Person was granted 143,300 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2020 Stock Incentive Plan (the "2020 Plan"). These RSUs vest in three equal installments on each of December 31, 2021, December 31, 2022 and December 31, 2023. As the second vesting date fell on a weekend, the second vesting event occurred on December 30, 2022, the previous business day.

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: Please see the section titled "Remarks" below for additional information.

F6: Each RSU represents a contingent right to receive one Ordinary Share or cash in lieu thereof at the Issuer's discretion.