AMARIN CORP PLC\UK — Director's Dealing 2018

Nov 30, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2018-11-30

Reporting Person: Kennedy Joseph T (General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-11-30	Ordinary Shares	M	1953	$1.02	Acquired	219887	Direct
2018-11-30	Ordinary Shares	M	2604	$1.40	Acquired	222491	Direct
2018-11-30	Ordinary Shares	M	18749	$2.50	Acquired	241240	Direct
2018-11-30	Ordinary Shares	S	23306	$17.8065	Disposed	217934	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-11-30	Stock Option (Right to Buy)	$1.02	M	1953	Disposed	2025-02-01	Ordinary Shares (1953)	Direct
2018-11-30	Stock Option (Right to Buy)	$1.40	M	2604	Disposed	2026-01-31	Ordinary Shares (2604)	Direct
2018-11-30	Stock Option (Right to Buy)	$2.50	M	18749	Disposed	2025-07-06	Ordinary Shares (18749)	Direct

Footnotes

F1: The option exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously 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 $17.24 to $18.05 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: On February 2, 2015, the Reporting Person was granted an option to purchase 93,750 Ordinary Shares under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). The shares subject to this option shall vest and become exercisable in 48 equal monthly installments on the last day of each month that began on February 28, 2015.

F6: On February 1, 2016, the Reporting Person was granted an option to purchase 125,000 Ordinary Shares under the Plan. The shares subject to this option shall vest and become exercisable in 48 equal monthly installments on the last day of each month that began on February 29, 2016.

F7: On July 6, 2015, the Reporting Person was granted an option to purchase 900,000 Ordinary Shares under the Plan. The shares subject to this option shall vest and become exercisable in 48 equal monthly installments on the last day of each month that began on July 31, 2015.