AMRN

SEC source: 0001562180-21-004741 · primarydocument.xml · nonDerivative · entry 4

Berg Aaron · CIK 0001770259 · CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 309,057

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

F4 · kind: 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 · balance_after: Please see the section titled "Remarks" below for additional information.

SEC source: 0001562180-21-004741 · primarydocument.xml · nonDerivative · entry 3

Berg Aaron · CIK 0001770259 · CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 312,068

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, 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"), of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004741 · primarydocument.xml · nonDerivative · entry 2

Berg Aaron · CIK 0001770259 · CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 309,014

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, 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"), of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004741 · primarydocument.xml · nonDerivative · entry 1

Berg Aaron · CIK 0001770259 · CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 307,487

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, 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"), of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004740 · primarydocument.xml · derivative · entry 7

Kalb Michael Wayne · CIK 0001678248 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,108

Underlying: Ordinary Shares · 3,054 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004740 · primarydocument.xml · derivative · entry 6

Kalb Michael Wayne · CIK 0001678248 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,054

Underlying: Ordinary Shares · 1,527 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004740 · primarydocument.xml · derivative · entry 5

Kalb Michael Wayne · CIK 0001678248 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,054

Underlying: Ordinary Shares · 1,527 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004740 · primarydocument.xml · nonDerivative · entry 4

Kalb Michael Wayne · CIK 0001678248 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 201,913

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

F4 · kind: 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 · balance_after: Please see the section titled "Remarks" below for additional information.

SEC source: 0001562180-21-004740 · primarydocument.xml · nonDerivative · entry 3

Kalb Michael Wayne · CIK 0001678248 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 204,924

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004740 · primarydocument.xml · nonDerivative · entry 2

Kalb Michael Wayne · CIK 0001678248 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 201,870

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004740 · primarydocument.xml · nonDerivative · entry 1

Kalb Michael Wayne · CIK 0001678248 · SVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 200,343

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004739 · primarydocument.xml · derivative · entry 7

Ketchum Steven B · CIK 0001289884 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,108

Underlying: Ordinary Shares · 3,054 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004739 · primarydocument.xml · derivative · entry 6

Ketchum Steven B · CIK 0001289884 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,054

Underlying: Ordinary Shares · 1,527 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004739 · primarydocument.xml · derivative · entry 5

Ketchum Steven B · CIK 0001289884 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,054

Underlying: Ordinary Shares · 1,527 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004739 · primarydocument.xml · nonDerivative · entry 4

Ketchum Steven B · CIK 0001289884 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 449,179

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

F4 · kind: 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 · balance_after: Please see the section titled "Remarks" below for additional information.

SEC source: 0001562180-21-004739 · primarydocument.xml · nonDerivative · entry 3

Ketchum Steven B · CIK 0001289884 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 452,306

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004739 · primarydocument.xml · nonDerivative · entry 2

Ketchum Steven B · CIK 0001289884 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 449,252

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004739 · primarydocument.xml · nonDerivative · entry 1

Ketchum Steven B · CIK 0001289884 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 447,725

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 220,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004738 · primarydocument.xml · derivative · entry 7

Kennedy Joseph T · CIK 0001408920 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,220

Underlying: Ordinary Shares · 3,610 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 260,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004738 · primarydocument.xml · derivative · entry 6

Kennedy Joseph T · CIK 0001408920 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,610

Underlying: Ordinary Shares · 1,805 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 260,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004738 · primarydocument.xml · derivative · entry 5

Kennedy Joseph T · CIK 0001408920 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,610

Underlying: Ordinary Shares · 1,805 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 260,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004738 · primarydocument.xml · nonDerivative · entry 4

Kennedy Joseph T · CIK 0001408920 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 314,443

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

F4 · kind: 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 · balance_after: Please see the section titled "Remarks" below for additional information.

SEC source: 0001562180-21-004738 · primarydocument.xml · nonDerivative · entry 3

Kennedy Joseph T · CIK 0001408920 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 318,246

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 260,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004738 · primarydocument.xml · nonDerivative · entry 2

Kennedy Joseph T · CIK 0001408920 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 314,636

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 260,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004738 · primarydocument.xml · nonDerivative · entry 1

Kennedy Joseph T · CIK 0001408920 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 312,831

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 260,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004737 · primarydocument.xml · derivative · entry 7

THERO JOHN F · CIK 0001199637 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,944

Underlying: Ordinary Shares · 13,472 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 970,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004737 · primarydocument.xml · derivative · entry 6

THERO JOHN F · CIK 0001199637 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,472

Underlying: Ordinary Shares · 6,736 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 970,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004737 · primarydocument.xml · derivative · entry 5

THERO JOHN F · CIK 0001199637 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,472

Underlying: Ordinary Shares · 6,736 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 970,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-004737 · primarydocument.xml · nonDerivative · entry 4

THERO JOHN F · CIK 0001199637 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,236,412

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

F4 · kind: 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 · balance_after: Please see the section titled "Remarks" below for additional information.

SEC source: 0001562180-21-004737 · primarydocument.xml · nonDerivative · entry 3

THERO JOHN F · CIK 0001199637 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,247,016

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 970,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004737 · primarydocument.xml · nonDerivative · entry 2

THERO JOHN F · CIK 0001199637 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,233,544

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 970,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004737 · primarydocument.xml · nonDerivative · entry 1

THERO JOHN F · CIK 0001199637 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,226,808

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · kind: As previously reported on February 27, 2020 and March 1, 2021, on May 15, 2017, the Reporting Person was granted 970,000 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan, of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-fourth vesting event occurred on June 30, 2021.

F3 · price: Not applicable.

SEC source: 0001562180-21-004329 · primarydocument.xml · derivative · entry 2

VAN HEEK G JAN · CIK 0001021040 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,000

Underlying: Ordinary Shares · 36,000 shares

Expires not disclosed

F3 · security: 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 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted 36,000 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in such year.

F5 · derivative.expiration_date: Not applicable.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004329 · primarydocument.xml · derivative · entry 1

VAN HEEK G JAN · CIK 0001021040 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,953

Underlying: Ordinary Shares · 45,953 shares

Expires 2031-06-14

F1 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted an option to purchase 45,953 Ordinary Shares under the Amarin Corporation plc 2020 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in 2022.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004331 · primarydocument.xml · derivative · entry 2

Zakrzewski Joseph S · CIK 0001331852 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,000

Underlying: Ordinary Shares · 36,000 shares

Expires not disclosed

F3 · security: 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 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted 36,000 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in such year.

F5 · derivative.expiration_date: Not applicable.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004331 · primarydocument.xml · derivative · entry 1

Zakrzewski Joseph S · CIK 0001331852 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,953

Underlying: Ordinary Shares · 45,953 shares

Expires 2031-06-14

F1 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted an option to purchase 45,953 Ordinary Shares under the Amarin Corporation plc 2020 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in 2022.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004328 · primarydocument.xml · derivative · entry 2

STACK DAVID M · CIK 0001204788 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,000

Underlying: Ordinary Shares · 36,000 shares

Expires not disclosed

F3 · security: 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 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted 36,000 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in such year.

F5 · derivative.expiration_date: Not applicable.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004328 · primarydocument.xml · derivative · entry 1

STACK DAVID M · CIK 0001204788 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,953

Underlying: Ordinary Shares · 45,953 shares

Expires 2031-06-14

F1 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted an option to purchase 45,953 Ordinary Shares under the Amarin Corporation plc 2020 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in 2022.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004326 · primarydocument.xml · derivative · entry 2

O'Sullivan Patrick J · CIK 0001468785 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,000

Underlying: Ordinary Shares · 36,000 shares

Expires not disclosed

F3 · security: 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 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted 36,000 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in such year.

F5 · derivative.expiration_date: Not applicable.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004326 · primarydocument.xml · derivative · entry 1

O'Sullivan Patrick J · CIK 0001468785 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,953

Underlying: Ordinary Shares · 45,953 shares

Expires 2031-06-14

F1 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted an option to purchase 45,953 Ordinary Shares under the Amarin Corporation plc 2020 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in 2022.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004327 · primarydocument.xml · derivative · entry 2

Peterson Kristine · CIK 0001508596 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,000

Underlying: Ordinary Shares · 36,000 shares

Expires not disclosed

F3 · security: 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 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted 36,000 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in such year.

F5 · derivative.expiration_date: Not applicable.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004327 · primarydocument.xml · derivative · entry 1

Peterson Kristine · CIK 0001508596 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,953

Underlying: Ordinary Shares · 45,953 shares

Expires 2031-06-14

F1 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted an option to purchase 45,953 Ordinary Shares under the Amarin Corporation plc 2020 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in 2022.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004325 · primarydocument.xml · derivative · entry 2

Ekman Lars · CIK 0001376117 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,000

Underlying: Ordinary Shares · 38,000 shares

Expires not disclosed

F3 · security: 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 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted 38,000 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in such year.

F5 · derivative.expiration_date: Not applicable.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0001562180-21-004325 · primarydocument.xml · derivative · entry 1

Ekman Lars · CIK 0001376117 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,506

Underlying: Ordinary Shares · 48,506 shares

Expires 2031-06-14

F1 · derivative.exercise_date: On June 14, 2021, the Reporting Person was granted an option to purchase 48,506 Ordinary Shares under the Amarin Corporation plc 2020 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 June 14, 2021 or (ii) the Issuer's annual general meeting of shareholders in 2022.

F2 · derivative.underlying: The Ordinary Shares may be represented by American Depositary Shares, each of which currently represents one Ordinary Share.

SEC source: 0000899243-21-022406 · doc4.xml · nonDerivative · entry 2

STACK DAVID M · CIK 0001204788 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 40,000

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

F3 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.46 to $4.58, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.

F4 · balance_after: Please see the section title "Remarks" below for additional information.

F5 · ownership.nature: Shares held by Three Colleens Investment LLC, a limited liability company jointly owned and managed by the Reporting Person and his spouse. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

SEC source: 0000899243-21-022406 · doc4.xml · nonDerivative · entry 1

STACK DAVID M · CIK 0001204788 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 30,000

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

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.61 to $4.64, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.

F4 · balance_after: Please see the section title "Remarks" below for additional information.

F5 · ownership.nature: Shares held by Three Colleens Investment LLC, a limited liability company jointly owned and managed by the Reporting Person and his spouse. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

SEC source: 0001562180-21-003852 · primarydocument.xml · derivative · entry 7

Berg Aaron · CIK 0001770259 · CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,162

Underlying: Ordinary Shares · 3,056 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, 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"), of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-third vesting event occurred on May 28, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-003852 · primarydocument.xml · derivative · entry 6

Berg Aaron · CIK 0001770259 · CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,581

Underlying: Ordinary Shares · 1,528 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, 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"), of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-third vesting event occurred on May 28, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-003852 · primarydocument.xml · derivative · entry 5

Berg Aaron · CIK 0001770259 · CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,581

Underlying: Ordinary Shares · 1,528 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

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

F2 · derivative.exercise_date: As previously reported on February 27, 2020 and March 1, 2021, 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"), of which the performance criteria related to two tranches representing 25% of the total award each was deemed achieved on February 25, 2020 pursuant to reporting of audited net product revenues for 2019 exceeding $400 million and of which the performance criteria related to one tranche representing 50% of the total award was deemed achieved on February 25, 2021 pursuant to reporting of audited net product revenues for 2020 exceeding $500 million. The tranches vest ratably over 36 months beginning September 30, 2018 subject to achievement of the performance criteria and continued service of the Reporting Person as provided in the RSU Award Agreement between the Issuer and Reporting Person. The thirty-third vesting event occurred on May 28, 2021.

F3 · derivative.expiration_date: Not applicable.

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

SEC source: 0001562180-21-003852 · primarydocument.xml · nonDerivative · entry 4

Berg Aaron · CIK 0001770259 · CHIEF COMMERCIAL OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 305,960

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

F4 · kind: 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 · balance_after: Please see the section titled "Remarks" below for additional information.