X0306 4 2016-07-11 0 0000897448 AMARIN CORP PLC\UK AMRN 0001245624 HEALY JAMES C/O SOFINNOVA VENTURES 3000 SAND HILL ROAD, BLDG 4, SUITE 250 MENLO PARK CA 94025 1 0 0 0 Stock Option (right to buy) 2.19 2016-07-11 4 A 0 28847 0.00 A 2026-07-11 Ordinary Shares 28847 28847 D Restricted Stock Units 0.00 2016-07-11 4 A 0 20548 0.00 A Ordinary Shares 20548 20548 D On July 11, 2016, the Reporting Person was granted an option to purchase 28,847 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 a single annual installment upon the earlier of (i) the anniversary of the grant date of July 11, 2016 or (ii) the Issuer's annual general meeting of shareholders in 2017. The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share. 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. On July 11, 2016, the Reporting Person was granted 20,548 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 11, 2016 or (ii) the Issuer's annual general meeting of shareholders in such year. Not applicable. In the event of a Change of Control (as defined in the Plan), each of the grants described in this Form 4 vests in full. /s/ Michael W. Kalb, by power of attorney 2016-07-13