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Director at Amarin (NASDAQ: AMRN) gains ADS from RSU vesting

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Amarin director Patrice Eadon Bonfiglio reported routine equity compensation activity involving American Depositary Shares (ADSs). On April 18, 2026, previously granted restricted stock units vested, resulting in the acquisition of 838 ADSs through a derivative exercise. In connection with this vesting, the company withheld 403 ADSs at a value of $14.98 per ADS to cover tax obligations, which the filing notes is not a market sale under Rule 16b-3. After these transactions, Bonfiglio directly owns 836 ADSs. Footnotes explain that one ADS represents twenty ordinary shares following an ADS ratio change and that the RSUs were granted under Amarin’s 2020 Stock Incentive Plan, vesting in three equal annual installments.

Positive

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Insider Bonfiglio Patrice Eadon
Role null
Type Security Shares Price Value
Exercise Restricted Stock Unit 838 $0.00 --
Exercise American Depositary Shares 838 $0.00 --
Tax Withholding American Depositary Shares 403 $14.98 $6K
Holdings After Transaction: Restricted Stock Unit — 838 shares (Direct, null); American Depositary Shares — 1,239 shares (Direct, null)
Footnotes (1)
  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. On April 18, 2024, following the conclusion of the Issuer's annual general meeting of shareholders for 2024, the Reporting Person was granted 2,514 RSUs under the Amarin Corporation plc 2020 Stock Incentive Plan (the "Plan"). These RSUs vest in three equal installments on each of April 18, 2025, April 18, 2026 and April 18, 2027. Not applicable. 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. Each RSU represents a contingent right to receive twenty Ordinary Shares or cash in lieu thereof at the Issuer's discretion.
ADSs acquired via RSU vesting 838 American Depositary Shares Derivative exercise on April 18, 2026
Shares withheld for taxes 403 American Depositary Shares at $14.98 Tax-withholding disposition on April 18, 2026
Direct ADS holdings after transaction 836 American Depositary Shares Post-transaction ownership on April 18, 2026
Original RSU grant size 2,514 restricted stock units Grant following 2024 annual general meeting, vesting 2025–2027
ADS to ordinary share ratio 1 ADS = 20 ordinary shares ADS Ratio Change effective April 11, 2025
American Depositary Shares financial
"Each RSU represents a contingent right to receive twenty Ordinary Shares or cash in lieu thereof"
American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.
Restricted Stock Unit financial
"the Reporting Person was granted 2,514 RSUs under the Amarin Corporation plc 2020 Stock Incentive Plan"
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
ADS Ratio Change financial
"one (1) American Depositary Share ("ADS") currently represents twenty (20) Ordinary Shares ("ADS Ratio Change")"
An ads ratio change is an adjustment to how many American Depositary Shares (ADS) represent one unit of a foreign company’s ordinary shares — like changing whether a cake is cut into 2 or 10 slices. Investors care because it alters the number of tradable ADS, the implied price per ADS and an investor’s ownership stake, which can affect liquidity, perceived value and comparisons of holdings across markets.
Rule 16b-3 regulatory
"vesting of a security issued in accordance with Rule 16b-3, and not a market sale"
Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.
Stock Incentive Plan financial
"granted 2,514 RSUs under the Amarin Corporation plc 2020 Stock Incentive Plan"
A stock incentive plan is a company program that gives employees or directors pieces of ownership or the right to buy shares over time, similar to receiving a bonus paid in company stock instead of cash. Investors pay attention because these plans align staff incentives with long‑term company performance but can also dilute existing shareholders and affect reported profits when grants are expensed, so they influence both ownership percentages and financial results.
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
Bonfiglio Patrice Eadon
(Last)(First)(Middle)
C/O AMARIN PHARMA, INC.
440 US HIGHWAY 22
(Street)
BRIDGEWATER NEW JERSEY 08807
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
AMARIN CORP PLC\UK [ AMRN ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/18/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
American Depositary Shares(1)04/18/2026M(2)838(1)A(3)1,239(1)D
American Depositary Shares(1)04/18/2026F(4)403(1)D$14.98836(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Unit(5)$004/18/2026M838(1) (2) (3)American Depositary Shares(1)838(1)$0838(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 April 18, 2024, following the conclusion of the Issuer's annual general meeting of shareholders for 2024, the Reporting Person was granted 2,514 RSUs under the Amarin Corporation plc 2020 Stock Incentive Plan (the "Plan"). These RSUs vest in three equal installments on each of April 18, 2025, April 18, 2026 and April 18, 2027.
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 attorney04/21/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider activity did Amarin (AMRN) report in this Form 4?

Amarin reported director Patrice Eadon Bonfiglio’s RSU vesting into 838 American Depositary Shares and related tax withholding of 403 ADSs. These transactions reflect routine equity compensation, not an open-market purchase or sale of shares.

Did the Amarin (AMRN) director buy or sell shares on the market?

No open-market trades occurred. Shares were acquired through restricted stock unit vesting and a derivative exercise, while 403 ADSs were withheld by Amarin to cover tax liabilities, which the filing states is not a market sale under Rule 16b-3.

How many Amarin (AMRN) ADSs does the director hold after these transactions?

Following the RSU vesting and tax withholding, director Patrice Eadon Bonfiglio directly holds 836 American Depositary Shares. This reflects the net position after receiving 838 ADSs from RSU conversion and the company’s withholding of 403 ADSs for taxes.

What was the size of the RSU vesting reported for Amarin (AMRN)?

The filing shows 838 Amarin American Depositary Shares were delivered upon conversion of restricted stock units. These ADSs came from an earlier grant of 2,514 RSUs, scheduled to vest in three equal installments across 2025, 2026, and 2027 under the company’s stock plan.

Why were 403 Amarin (AMRN) ADSs disposed of in this Form 4?

The 403 ADSs were withheld by Amarin to satisfy tax obligations tied to RSU vesting. The filing specifies this withholding is a tax-related disposition under Rule 16b-3, not a discretionary sale on the open market by the director.

What does the ADS ratio change mean for Amarin (AMRN) shareholders?

The footnotes state one American Depositary Share now represents twenty ordinary shares after an ADS ratio change. All reported equity award amounts, including RSUs and ADSs in this Form 4, have been proportionally adjusted to reflect that updated ADS-to-ordinary-share ratio.