AMARIN CORP PLC\UK — Director's Dealing 2020

Feb 27, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2020-02-25

Reporting Person: Kennedy Joseph T (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-02-25	Ordinary Shares	M	30697.00	—	Acquired	191522.00	Direct
2020-02-25	Ordinary Shares	M	30697.00	—	Acquired	222219.00	Direct
2020-02-25	Ordinary Shares	F	32324.00	$17.58	Disposed	189895.00	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-02-25	Restricted Stock Units	$0.00	A	65000.00	Acquired		Ordinary Shares (65000.00)	Direct
2020-02-25	Restricted Stock Units	$0.00	M	30697.00	Disposed		Ordinary Shares (30697.00)	Direct
2020-02-25	Restricted Stock Units	$0.00	A	65000.00	Acquired		Ordinary Shares (65000.00)	Direct
2020-02-25	Restricted Stock Units	$0.00	M	30697.00	Disposed		Ordinary Shares (30697.00)	Direct

Footnotes

F1: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

F2: On May 15, 2017, the Reporting Person was granted 260,000 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 30,697 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.

F3: Not applicable.

F4: 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.

F5: Please see the section titled "Remarks" below for additional information.

F6: Each RSU represents a contingent right to receive one Ordinary Share or cash in lieu thereof at the Issuer's discretion.