AMARIN CORP PLC\UK — Director's Dealing 2017

May 17, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2017-05-15

Reporting Person: Zakrzewski Joseph S (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-15	Stock Option (right to buy)	$3.06	A	21146	Acquired	2027-05-15	Ordinary Shares (21146)	Direct
2017-05-15	Restricted Stock Units	$0.00	A	14706	Acquired		Ordinary Shares (14706)	Direct

Footnotes

F1: On May 15, 2017, the Reporting Person was granted an option to purchase 21,146 Ordinary Shares under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). The option shall vest and become exercisable in a single annual installment upon the earlier of (i) the anniversary of the grant date of May 15, 2017 or (ii) the Issuer's annual general meeting of shareholders in 2018.

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

F3: 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.

F4: On May 15, 2017 the Reporting Person was granted 14,706 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 May 15, 2017 or (ii) the Issuer's annual general meeting of shareholders in such year.

F5: Not applicable.