X0306 4 2020-02-25 false 0000897448 AMARIN CORP PLC\UK AMRN 0001289884 Ketchum Steven B C/O AMARIN PHARMA, INC. 440 US HIGHWAY 22 BRIDGEWATER NJ 08807 false true false false Chief Scientific Officer Ordinary Shares 2020-02-25 4 M false 25974.00 A 514074.00 D Ordinary Shares 2020-02-25 4 M false 25974.00 A 540048.00 D Ordinary Shares 2020-02-25 4 F false 25586.00 17.58 D 514462.00 D Restricted Stock Units 0.00 2020-02-25 4 A false 55000.00 0.00 A Ordinary Shares 55000.00 55000.00 D Restricted Stock Units 0.00 2020-02-25 4 M false 25974.00 0.00 D Ordinary Shares 25974.00 29026.00 D Restricted Stock Units 0.00 2020-02-25 4 A false 55000.00 0.00 A Ordinary Shares 55000.00 55000.00 D Restricted Stock Units 0.00 2020-02-25 4 M false 25974.00 0.00 D Ordinary Shares 25974.00 29026.00 D The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share. On May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). These RSUs consist of three tranches representing 25%, 25% and 50% of the total award. Each tranche vests ratably over 36 months beginning Sept. 30, 2018 subject to achievement of certain prespecified performance criteria and continued employment of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. On Feb. 25, 2020, pursuant to reporting of audited net total revenue for 2019 exceeding $400 million, the performance criteria related to both 25% tranches was deemed to be achieved, resulting in the vesting of 25,974 RSUs per tranche. The remaining RSUs in these two tranches will continue to vest over 19 monthly installments. The performance criteria related to the 50% tranche has not yet been achieved; such tranche has not lapsed as a result of achieving the other two tranches. Not applicable. Represents withholding by the Issuer of shares in respect of tax liability incident to the vesting of a security issued in accordance with Rule 16b-3, and not a market sale of securities. Please see the section titled "Remarks" below for additional information. Each RSU represents a contingent right to receive one Ordinary Share or cash in lieu thereof at the Issuer's discretion. As of the date of this Form 4, the Reporting Person owns or holds the right to acquire an aggregate of 1,523,662 Ordinary Shares of the Issuer in the form of Ordinary Shares, stock options and RSUs granted under the Plan, including but not limited to certain performance-based RSUs that are earned only if product revenues reach pre-defined annual milestone levels and, in certain cases, then vest only if the recipient remains with the company for an extended period of time. /s/ Joseph T. Kennedy, by power of attorney 2020-02-27