AMARIN CORP PLC\UK — Director's Dealing 2021

Sep 2, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMARIN CORP PLC\UK (AMRN)
CIK: 0000897448
Period of Report: 2021-09-01

Reporting Person: Marks Jason M. (N/A)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-09-01	Stock Option (Right to Buy)	$5.43	A	100000.00	Acquired	2031-09-01	Ordinary Shares (100000.00)	Direct
2021-09-01	Restricted Stock Units	$0.00	A	100000.00	Acquired		Ordinary Shares (100000.00)	Direct

Footnotes

F1: On September 1, 2021, the Reporting Person was granted an option to purchase 100,000 Ordinary Shares under the Amarin Corporation plc 2020 Stock Incentive Plan (the "2020 Plan"). The shares subject to this option shall vest and become exercisable over four years, with 25% to vest on August 19, 2022 and the balance to vest ratably over the subsequent 12 calendar quarters on the nineteenth (19th) day of each November, February, May and August.

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.

F4: On September 1, 2021, the Reporting Person was granted 100,000 RSUs under the 2020 Plan. These RSUs vest in three equal installments on each of August 19, 2022, August 19, 2023 and August 19, 2024.

F5: Not applicable.