Amarin (AMRN) CEO Aaron Berg reports new RSU and option grants

Rhea-AI Filing Summary

Amarin Corporation plc President and CEO Aaron Berg reported several equity compensation events and related share movements. On February 1, 2026, he received 26,793 restricted stock units (RSUs) and a stock option for 120,566 American Depositary Shares (ADSs) under Amarin’s 2020 Stock Incentive Plan.

Each RSU represents a contingent right to receive twenty ordinary shares or cash. On January 31, 2026, previously granted RSUs vested, converting into 2,246 ADSs and 1,933 ADSs. The company withheld 1,235 ADSs and 1,063 ADSs at $15.42 per ADS to cover tax liabilities, which is explicitly described as not being market sales.

The filing notes a prior ADS ratio change effective April 11, 2025, where one ADS now represents twenty ordinary shares, and all reported amounts reflect this adjusted ratio.

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

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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^*

Berg Aaron

(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)
	President and CEO

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)		2,246(1)	A	(3)	82,960(1)	D
American Depositary Shares(1)	01/31/2026		F(4)		1,235(1)	D	$15.42	81,725(1)	D
American Depositary Shares(1)	01/31/2026		M(5)		1,933(1)	A	(3)	83,658(1)	D
American Depositary Shares(1)	01/31/2026		F(4)		1,063(1)	D	$15.42	82,595(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		2,246(1)		(2)	(3)	American Depositary Shares(1)	2,246(1)	$0.00	0	D
Restricted Stock Unit(6)	$0	01/31/2026		M		1,933(1)		(5)	(3)	American Depositary Shares(1)	1,933(1)	$0.00	1,933	D
Restricted Stock Unit(6)	$0	02/01/2026		A		26,793(1)		(7)	(3)	American Depositary Shares(1)	26,793(1)	$0.00	26,793	D
Stock Option (right to buy)	$14.99	02/01/2026		A		120,566(1)		(8)	02/01/2036	American Depositary Shares(1)	120,566(1)	$0.00	120,566(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 21, 2023, the Reporting Person was granted 6,740 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2020 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 5,800 RSUs under 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 26,793 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 120,566 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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FAQ

What insider transactions did Amarin (AMRN) CEO Aaron Berg report on this Form 4?

Aaron Berg reported RSU vesting, new RSU and option grants, and tax share withholding. RSUs converted into ADSs on January 31, 2026, while fresh RSUs and a stock option were granted on February 1, 2026, all under Amarin’s 2020 Stock Incentive Plan.

How many new restricted stock units did Amarin (AMRN) grant its CEO Aaron Berg?

Amarin granted Aaron Berg 26,793 restricted stock units on February 1, 2026. These RSUs vest in three equal installments on January 31 of 2027, 2028, and 2029, providing multi‑year equity-based compensation aligned with continued service and performance at the company.

What stock option award did Amarin (AMRN) CEO Aaron Berg receive in this filing?

Aaron Berg received a stock option for 120,566 American Depositary Shares with a $14.99 exercise price. The option vests over three years: 33% on the first anniversary, and the remainder quarterly over the next eight quarters, encouraging longer-term retention and alignment.

Were any of Aaron Berg’s Amarin (AMRN) shares sold on the open market in this Form 4?

The filing states that certain ADSs were withheld to cover tax liabilities, not sold on the market. Codes marked “F” and a footnote clarify these are issuers’ tax withholdings related to vesting, rather than discretionary open-market share sales by Aaron Berg.

What does the ADS ratio change mentioned in Amarin (AMRN) CEO’s Form 4 mean for share counts?

Effective April 11, 2025, one Amarin ADS represents twenty ordinary shares. The company adjusted outstanding equity awards proportionately, and all amounts in this Form 4 reflect the new ratio, helping investors interpret RSU and option quantities consistently with the current ADS structure.

How many Amarin (AMRN) ADSs did Aaron Berg receive from RSU vesting and how many were withheld for taxes?

Vesting converted RSUs into 2,246 and 1,933 ADSs on January 31, 2026. To cover tax liabilities, Amarin withheld 1,235 and 1,063 ADSs at $15.42 per ADS, leaving the remaining vested shares credited to Berg’s direct beneficial ownership as reported.