AMARIN CORP PLC\UK — Director's Dealing 2018

Sep 25, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2018-09-22

Reporting Person: THERO JOHN F (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-09-22	Ordinary Shares	A	1265250	—	Acquired	2769661	Direct
2018-09-22	Ordinary Shares	F	497876	$2.99	Disposed	2271785	Direct

Footnotes

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

F2: On February 2, 2015, the Reporting Person was granted 2,530,500 restricted stock units (the "RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). Each RSU represents a contingent right to receive one Ordinary Share or cash in lieu thereof at the Issuer's discretion. The RSUs vest in two equal installments based on the Issuer's satisfaction of certain performance criteria and continued employment of the Reporting Person as provided in the Restricted Stock Unit Award Agreement between the Issuer and the Reporting Person. The performance criteria for the first installment was met, resulting in vesting of 1,265,250 RSUs.

F3: Not applicable.

F4: Please see the section titled "Remarks" below for additional information.

F5: 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.