AMARIN CORP PLC\UK — Director's Dealing 2015

Jul 8, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2015-07-06

Reporting Person: O'Sullivan Patrick J (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-07-06	Stock Option (right to buy)	$2.50	A	17358	Acquired	2025-07-06	Ordinary Shares (17358)	Direct
2015-07-06	Stock Option (right to buy)	$2.50	A	23144	Acquired	2025-07-06	Ordinary Shares (23144)	Direct
2015-07-06	Restricted Stock Units	$0.00	A	40500	Acquired		Ordinary Shares (40500)	Direct
2015-07-06	Restricted Stock Units	$0.00	A	18000	Acquired		Ordinary Shares (18000)	Direct

Footnotes

F1: On July 6, 2015, the Reporting Person was granted an option to purchase 17,358 Ordinary Shares under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). The shares subject to this option shall vest and become exercisable in equal annual installments over a three-year period, with each installment vesting upon the earlier of (i) the anniversary of the grant date of July 6, 2015 or (ii) the Issuer's annual general meeting of shareholders in such year.

F2: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

F3: On July 6, 2015, the Reporting Person was granted an option to purchase 23,144 Ordinary Shares under the Plan. The shares subject to this option shall vest and become exercisable in full upon the earlier of (i) the one-year anniversary of the grant date of July 6, 2015 or (ii) the Issuer's next annual general meeting of shareholders.

F4: Each Restricted Stock Unit ("RSU") represents a contingent right to receive one Ordinary Share or cash in lieu thereof at the Issuer's discretion, with settlement to be made on a deferred basis, specifically upon the non-employee director's separation of service with the Issuer.

F5: On July 6, 2015, the Reporting Person was granted 40,500 RSUs under the Plan. The RSUs vest in equal annual installments over a three-year period, with each installment vesting upon the earlier of (i) the anniversary of the grant date of July 6, 2015 or (ii) the Issuer's annual general meeting of shareholders in such year.

F6: Not applicable.

F7: On July 6, 2015, the Reporting Person was granted 18,000 RSUs under the Plan. The RSUs vest in full upon the earlier of (i) the one-year anniversary of the grant date of July 6, 2015 or (ii) the Issuer's 2016 annual general meeting of shareholders.