AMARIN CORP PLC\UK — Director's Dealing 2011

Apr 20, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2011-04-18

Reporting Person: VAN HEEK G JAN (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-04-18	Ordinary Shares	M	3000	$1.03	Acquired	22317	Direct
2011-04-18	Ordinary Shares	S	3000	$16.51	Disposed	19317	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-04-18	Stock Option (right to buy)	$1.03	M	3000	Disposed	2020-02-10	Ordinary Shares (3000)	Direct

Footnotes

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

F2: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F3: On February 20, 2010, the reporting person was granted an option under the Amarin Corporation plc 2002 Stock Option Plan. The stock option initially vested in four equal installments on each anniversary of such grant date. In December 2010, the Issuer's Board of Directors approved the acceleration of the vesting of this award by six months such that the option vests in four equal installments and will be fully vested on August 20, 2013.