AMARIN CORP PLC\UK — Director's Dealing 2012

Apr 11, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2012-04-09

Reporting Person: THERO JOHN F (President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-04-09	Ordinary Shares	M	150926	$1.35	Acquired	150926	Direct
2012-04-09	Ordinary Shares	S	150926	$9.959	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-04-09	Stock Option (right to buy)	$1.35	M	150926	Disposed	2019-12-21	Ordinary Shares (150926)	Direct

Footnotes

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

F2: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.81 to $10.08, 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.

F3: On December 21, 2009, the reporting person was granted an option under the Amarin Corporation plc 2002 Stock Option Plan. The stock option vests in four equal installments on December 21, 2010, June 21, 2011, June 21, 2012 and June 21, 2013.

F4: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 9, 2012.