[Form 4] Amarin Corp Plc Insider Trading Activity

Rhea-AI Filing Summary

Amarin Corp. plc (AMRN) – Form 4 (08/04/2025)

CFO Peter L. Fishman reported routine equity vesting on 08/01/2025. A previously granted award vested, delivering 312 American Depositary Shares (ADS) to the executive. Of these, 160 ADS were withheld by the company to cover taxes at an implied price of $14.52, leaving 152 net ADS added to his direct holdings. Following the transaction, Fishman beneficially owns 3,988 ADS.

The filing reflects Amarin’s 04/11/2025 ratio change whereby 1 ADS now equals 20 ordinary shares; all share amounts have been proportionately adjusted. No open-market sale occurred, and there were no cash proceeds to the insider. Remaining portions of the original 1,250-RSU grant will vest on 08/01/2026 under the 2011 Stock Incentive Plan.

Because the activity involves tax-related share withholding rather than discretionary selling, the market impact is considered minimal.

Insights

Financial Analyst

TL;DR: Routine RSU vesting; no open-market sales—neutral for valuation.

The Form 4 shows standard executive compensation mechanics: 312 ADS vested, 160 withheld for taxes, net 152 retained. The CFO now controls 3,988 ADS, a de-minimis stake relative to Amarin’s float, so signaling value is limited. Absence of discretionary selling avoids negative optics, yet the small size provides little positive read-through. Overall, the event neither alters share supply nor conveys new fundamental information; therefore, I view it as neutral for investors.

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

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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^*

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)
08/01/2025

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 Share(1)	08/01/2025		M(2)		312(1)	A	(3)	4,148(1)	D
American Depositary Share(1)	08/01/2025		F(4)		160(1)	D	$14.52	3,988(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(5)	$0.00	08/01/2025		A		312(1)		(2)	(3)	American Depositary Shares(1)	312(1)	$0.00	313(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 August 8, 2022, the Reporting Person was granted 1,250 RSUs under the Amarin Corporation plc 2011 Stock Incentive Plan (the "Plan"). These RSUs vest in four equal installments on each of August 1, 2023, August 1, 2024, August 1, 2025, and August 1, 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. Each RSU represents a contingent right to receive twenty Ordinary Shares or cash in lieu thereof at the Issuer's discretion.

	/s/ Jonathan Provoost, by power of attorney	08/04/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What did Amarin (AMRN) disclose in its latest Form 4?

The CFO reported vesting of 312 ADS on 08/01/2025, with 160 shares withheld for taxes.

How many AMRN shares does CFO Peter Fishman now own?

After the transaction, he holds 3,988 American Depositary Shares directly.

Were any AMRN shares sold on the open market by the CFO?

No. Shares were only withheld for taxes; no market sale occurred.

What is the current ADS-to-ordinary-share ratio for Amarin?

Since 04/11/2025, 1 ADS equals 20 ordinary shares.

When will the remaining RSUs granted to the CFO vest?

The final tranche of the 2022 award vests on 08/01/2026.