AMARIN CORP PLC\UK — Director's Dealing 2018

Jan 23, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2018-01-23

Reporting Person: Ketchum Steven B (Chief Scientific Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-01-23	Ordinary Shares	M	135205	$2.04	Acquired	277002	Direct
2018-01-23	Ordinary Shares	S	135205	$4.4113	Disposed	141797	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-01-23	Stock Option (Right to Buy)	$2.04	M	135205	Disposed	2024-01-08	Ordinary Shares (135205)	Direct

Footnotes

F1: The exercise and sale transaction reported in the Form 4 is made pursuant to a Rule 10b5-1 plan.

F2: The Ordinary Shares may be represented by American Depositary Shares, each of which represents one Ordinary Share.

F3: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.40 to $4.45, inclusive. The Reporting Person has provided the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of Ordinary Shares sold at each separate price.

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

F5: On January 8, 2014, the Reporting Person was granted an option to purchase 202,500 Ordinary Shares under the Amarin Corporation plc 2011 Stock Incentive Plan. The shares subject to this option are fully vested and exercisable as of the date of this Form 4.