AMARIN CORP PLC\UK — Director's Dealing 2018

Sep 26, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2018-09-24

Reporting Person: Kalb Michael Wayne (SVP and CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-09-24	Ordinary Shares	M	150000	$2.19	Acquired	164996	Direct
2018-09-24	Ordinary Shares	S	79800	$10.152	Disposed	85196	Direct
2018-09-24	Ordinary Shares	S	70200	$10.7211	Disposed	14996	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-09-24	Stock Option (Right to Buy)	$2.19	M	150000	Disposed	2026-07-01	Ordinary Shares (150000)	Direct

Footnotes

F1: The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

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

F3: Please see the section titled "Remarks" below for additional information.

F4: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.54 to $10.53, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.54 to $11.08, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

F6: On July 1, 2016, the Reporting Person was granted an option to purchase 625,000 Ordinary Shares under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). The shares subject to this option shall vest as follows: 25% of the total number of underlying shares shall vest on July 1, 2017, and the remaining 75% of the underlying shares shall vest ratably over the subsequent 36 months.