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: Abingworth LLP (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-04-18	Ordinary Shares, 50 pence par value per share	S	4179174	$14.8698	Disposed	7895826	Indirect

Footnotes

F1: The sales reported in this Form 4 were effected pursuant to pre-arranged stock trading plans (the "Trading Plans") entered into by each of Abingworth Bioventures V L.P., Abingworth Bioventures V Co-Invest Growth Equity Fund LP and Abingworth Bioequities Master Fund Limited (collectively, the "Abingworth Funds") on March 9, 2011. The Trading Plans were designed to comply with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended (the "Exchange Act"). The Abingworth Funds terminated the Trading Plans as of April 18, 2011, following the trades reported herein.

F2: Abingworth LLP (the "Reporting Person") is the investment manager to a number of investment funds that include the Abingworth Funds. The Reporting Person may be deemed to beneficially own the reported securities indirectly through the Abingworth Funds. The Abingworth Funds sold an aggregate of 4,179,174 ordinary shares, 50 pence par value per share, of Amarin Corporation plc on April 18, 2011.

F3: The Reporting Person's interest in the securities reported herein is limited to the extent of its pecuniary interest in the Abingworth Funds, if any. This report shall not be deemed an admission that the Reporting Person, each Abingworth Fund or any other person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Exchange Act or for any other purpose.