AMARIN CORP PLC\UK — Director's Dealing 2018

Jul 3, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2018-06-30

Reporting Person: Kennedy Joseph T (General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-06-30	Ordinary Shares	M	47187	—	Acquired	65621	Direct
2018-06-30	Ordinary Shares	M	6250	—	Acquired	71871	Direct
2018-06-30	Ordinary Shares	F	26495	$3.09	Disposed	45376	Direct
2018-07-02	Ordinary Shares	S	26942	$3.0048	Disposed	18434	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-06-30	Restricted Stock Units	$0.00	M	47187	Disposed		Ordinary Shares (47187)	Direct
2018-06-30	Restricted Stock Units	$0.00	M	6250	Disposed		Ordinary Shares (6250)	Direct

Footnotes

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

F2: As previously reported on July 8, 2015, the Reporting Person was granted 755,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). These RSUs vest in 16 equal quarterly installments. The twelfth vesting event occurred on June 30, 2018.

F3: Not applicable.

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

F5: As previously reported on October 6, 2015, the Reporting Person was granted 100,000 RSUs under the Plan. These RSUs vest in 16 equal quarterly installments. The twelfth vesting event occurred on June 30, 2018.

F6: 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.

F7: Sales made pursuant to a 10b5-1 trading plan dated December 9, 2016.

F8: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.92 to $3.09, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff at the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

F9: Each RSU represents a contingent right to receive one Ordinary Share or cash in lieu thereof at the Issuer's discretion.