[Form 4] AMARIN CORP PLCUK Insider Trading Activity

Amarin Corporation’s SVP and CFO Peter L. Fishman reported equity compensation and related share activity.

Rhea-AI Filing Summary

Amarin Corporation’s SVP and CFO Peter L. Fishman reported equity compensation and related share activity. On February 1, 2026, he received 6,167 restricted stock units (RSUs) and a stock option for 27,750 American Depositary Shares (ADSs) with a $14.99 exercise price, all under the company’s stock plan.

These RSUs vest in three equal installments on January 31 of 2027, 2028, and 2029. On January 31, 2026, previously granted RSUs vested, resulting in the issuance of 563 and 1,833 ADSs, with 310 and 1,008 ADSs withheld at $15.42 per share to cover tax obligations rather than sold in the market.

Insider Trade Summary

2,396 shares exercised/converted

Exercise 8 txns

Insider Fishman Peter L.

Role SVP, CFO

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	6,167	$0.00	$0.00
Grant/Award	Stock Option (right to buy)	27,750	$0.00	$0.00
Exercise	Restricted Stock Unit	563	$0.00	$0.00
Exercise	Restricted Stock Unit	1,833	$0.00	$0.00
Exercise	American Depositary Shares	563	$0.00	$0.00
Exercise Price or Tax Liability	American Depositary Shares	310	$15.42	$5K
Exercise	American Depositary Shares	1,833	$0.00	$0.00
Exercise Price or Tax Liability	American Depositary Shares	1,008	$15.42	$16K

Holdings After Transaction: Restricted Stock Unit — 8,000 contracts (Direct); Stock Option (right to buy) — 27,750 contracts (Direct); American Depositary Shares — 6,157 shares (Direct)

Footnotes (8)

1. F1. Effective April 11, 2025, the Issuer implemented a ratio change that one (1) American Depositary Share ("ADS") currently represents twenty (20) Ordinary Shares ("ADS Ratio Change"). Proportionate adjustments were made to the Issuer's outstanding equity awards. The amount of securities reported on this Form 4 reflect the ADS Ratio Change.
2. F2. On February 1, 2023, the Reporting Person was granted 1,690 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). These RSUs vest in three equal installments on each of January 31, 2024, January 31, 2025, and January 31, 2026.
3. F3. Not applicable.
4. 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.
5. F5. On February 1, 2024, the Reporting Person was granted 5,500 RSUs under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). These RSUs vest in three equal installments on each of January 31, 2025, January 31, 2026, and January 31, 2027.
6. F6. Each RSU represents a contingent right to receive twenty Ordinary Shares or cash in lieu thereof at the Issuer's discretion.
7. F7. On February 1, 2026, the Reporting Person was granted 6,167 RSUs under the Plan. These RSUs vest in three equal installments on each of January 31, 2027, January 31, 2028 and January 31, 2029.
8. F8. On February 1, 2026, the Reporting Person was granted an option to purchase 27,750 ADSs under the Plan. The shares subject to this option shall vest and become exercisable over three years, with 33% to vest on the first anniversary of the grant date and the balance to vest ratably over the subsequent 8 calendar quarters on the first day of each May, August, November and February.

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Accepted by SEC EDGAR 02/03/2026 - 07:00 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Fishman Peter L.

(Last) (First) (Middle)

C/O AMARIN PHARMA, INC.

440 US HIGHWAY 22

(Street)

BRIDGEWATER NJ 08807

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
AMARIN CORP PLC\UK [ AMRN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, CFO

3. Date of Earliest Transaction (Month/Day/Year)
01/31/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
American Depositary Shares(1)	01/31/2026		M(2)		563(1)	A	(3)	5,642(1)	D
American Depositary Shares(1)	01/31/2026		F(4)		310(1)	D	$15.42	5,332(1)	D
American Depositary Shares(1)	01/31/2026		M(5)		1,833(1)	A	(3)	7,165(1)	D
American Depositary Shares(1)	01/31/2026		F(4)		1,008(1)	D	$15.42	6,157(1)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit(6)	$0	01/31/2026		M		563(1)		(2)	(3)	American Depositary Shares(1)	563(1)	$0.00	0(1)	D
Restricted Stock Unit(6)	$0	01/31/2026		M		1,833(1)		(5)	(3)	American Depositary Shares(1)	1,833(1)	$0.00	1,833(1)	D
Restricted Stock Unit(6)	$0	02/01/2026		A		6,167(1)		(7)	(3)	American Depositary Shares(1)	6,167(1)	$0.00	6,167(1)	D
Stock Option (right to buy)	$14.99	02/01/2026		A		27,750(1)		(8)	02/01/2036	American Depositary Shares(1)	27,750(1)	$0.00	27,750(1)	D

Explanation of Responses:

1. Effective April 11, 2025, the Issuer implemented a ratio change that one (1) American Depositary Share ("ADS") currently represents twenty (20) Ordinary Shares ("ADS Ratio Change"). Proportionate adjustments were made to the Issuer's outstanding equity awards. The amount of securities reported on this Form 4 reflect the ADS Ratio Change.

2. On February 1, 2023, the Reporting Person was granted 1,690 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). These RSUs vest in three equal installments on each of January 31, 2024, January 31, 2025, and January 31, 2026.

3. Not applicable.

4. 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.

5. On February 1, 2024, the Reporting Person was granted 5,500 RSUs under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). These RSUs vest in three equal installments on each of January 31, 2025, January 31, 2026, and January 31, 2027.

6. Each RSU represents a contingent right to receive twenty Ordinary Shares or cash in lieu thereof at the Issuer's discretion.

7. On February 1, 2026, the Reporting Person was granted 6,167 RSUs under the Plan. These RSUs vest in three equal installments on each of January 31, 2027, January 31, 2028 and January 31, 2029.

8. On February 1, 2026, the Reporting Person was granted an option to purchase 27,750 ADSs under the Plan. The shares subject to this option shall vest and become exercisable over three years, with 33% to vest on the first anniversary of the grant date and the balance to vest ratably over the subsequent 8 calendar quarters on the first day of each May, August, November and February.

	/s/ Jonathan Provoost, by power of attorney	02/03/2026
	** Signature of Reporting Person	Date
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