AMARIN CORP PLC\UK — Director's Dealing 2019

May 21, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2019-05-20

Reporting Person: Zakrzewski Joseph S (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-05-20	Stock Option (Right to Buy)	$16.83	A	9658	Acquired	2029-05-20	Ordinary Shares (9658)	Direct
2019-05-20	Restricted Stock Units	$0.00	A	7428	Acquired		Ordinary Shares (7428)	Direct

Footnotes

F1: On May 20, 2019, the Reporting Person was granted an option to purchase 9,658 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 20, 2019 or (ii) the Issuer's annual general meeting of shareholders in 2020.

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 20, 2019, the Reporting Person was granted 7,428 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 20, 2019 or (ii) the Issuer's annual general meeting of shareholders in such year.

F5: Not applicable.