AMARIN CORP PLC\UK — Director's Dealing 2018

Nov 14, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2018-11-12

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-11-12	Ordinary Shares	M	407611	$1.35	Acquired	2702139	Direct
2018-11-12	Ordinary Shares	S	136422	$18.0498	Disposed	2565717	Direct
2018-11-12	Ordinary Shares	S	244031	$19.0273	Disposed	2321686	Direct
2018-11-12	Ordinary Shares	S	222158	$19.7096	Disposed	2099528	Direct
2018-11-12	Ordinary Shares	S	5000	$20.722	Disposed	2094528	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-11-12	Stock Option (Right to Buy)	$1.35	M	407611	Disposed	2019-12-21	Ordinary Shares (407611)	Direct

Footnotes

F1: The option exercise and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person established in 2017. The option reported in this Form 4 was granted in 2009 and was set to expire in 2019.

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 $17.43 to $18.42, 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.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.43 to $19.42, 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.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.43 to $20.41, 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.

F7: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.46 to $20.98, 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.

F8: On December 21, 2009, the Reporting Person was granted an option to purchase 900,000 Ordinary Shares under the Amarin Corporation plc 2002 Stock Option Plan. The stock option is fully vested.