STOCK TITAN

Amarin Corporation (AMRN) director exercises RSUs, tax shares withheld

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Amarin director Louis Sterling III exercised 838 Restricted Stock Units on April 18, 2026, receiving 838 American Depositary Shares. The issuer withheld 403 ADS to cover tax liability at $14.98 per share. Following these transactions, he holds 4,049 ADS directly.

Positive

  • None.

Negative

  • None.
Insider Sterling Louis III
Role Director
Type Security Shares Price Value
Exercise Restricted Stock Unit 838 $0.00 $0.00
Exercise American Depositary Shares 838 $0.00 $0.00
Exercise Price or Tax Liability American Depositary Shares 403 $14.98 $6K
Holdings After Transaction: Restricted Stock Unit — 838 shares (Direct); American Depositary Shares — 4,049 shares (Direct)
Footnotes (5)
  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 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. 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. Each RSU represents a contingent right to receive twenty Ordinary Shares or cash in lieu thereof at the Issuer's discretion.
RSUs exercised 838 Restricted Stock Units Exercised on April 18, 2026 into American Depositary Shares
ADS acquired from RSU exercise 838 American Depositary Shares Received upon RSU exercise on April 18, 2026
Shares withheld for tax 403 American Depositary Shares Withheld by issuer at $14.98 per share to cover tax liability
Tax withholding price $14.98 per share Per-share price used for ADS withheld for taxes
Post-transaction holdings 4,049 American Depositary Shares Director’s direct ADS holdings after reported transactions
RSUs granted 2,514 RSUs Granted on April 18, 2024 under the 2020 Stock Incentive Plan
ADS ratio 1 ADS = 20 Ordinary Shares ADS Ratio Change effective April 11, 2025
Ordinary Shares per RSU 20 Ordinary Shares per RSU Each RSU is a contingent right to receive twenty Ordinary Shares or cash
Restricted Stock Unit financial
"Security title recorded as Restricted Stock Unit for derivative transaction."
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.
American Depositary Shares financial
"Underlying and non-derivative security described as American Depositary Shares."
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.
Rule 16b-3 regulatory
"Footnote explains withholding of shares incident to vesting under Rule 16b-3."
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.
ADS Ratio Change financial
"Footnote notes an ADS Ratio Change where 1 ADS equals 20 Ordinary Shares."
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.
contingent right financial
"Footnote states each RSU represents a contingent right to receive Ordinary Shares."

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google
Add on Google
Learn about SEC filing dates

FAQ

What insider transaction did Amarin (AMRN) director Louis Sterling III report?

Louis Sterling III exercised 838 Restricted Stock Units into 838 American Depositary Shares on April 18, 2026. The issuer also withheld 403 ADS at $14.98 per share for taxes, leaving him with 4,049 ADS held directly.

How many Amarin (AMRN) shares were withheld for taxes in this Form 4?

The issuer withheld 403 American Depositary Shares to satisfy tax liability, at a per-share price of $14.98. A footnote explains such withholding relates to vesting under Rule 16b-3 and is characterized as issuer tax withholding rather than a market sale.

What are Louis Sterling III’s Amarin (AMRN) holdings after these transactions?

After the reported equity transactions, Louis Sterling III holds 4,049 American Depositary Shares directly. This canonical post-transaction balance reflects the RSU exercise, tax withholding disposition, and any prior holdings consolidated into his current ADS position.

What RSU grant and vesting schedule does Amarin (AMRN) describe for Louis Sterling III?

A footnote states he was granted 2,514 RSUs on April 18, 2024 under Amarin’s 2020 Stock Incentive Plan. These RSUs vest in three equal installments on April 18, 2025, 2026 and 2027, forming part of his ongoing equity-based compensation.

How does Amarin (AMRN) define its ADS to Ordinary Share ratio in this filing?

Amarin notes an ADS Ratio Change effective April 11, 2025, where one American Depositary Share now represents twenty Ordinary Shares. Proportionate adjustments were made to outstanding equity awards, and all reported security amounts reflect this updated ADS ratio.

What does each RSU represent in Amarin (AMRN)’s equity plans?

Each Restricted Stock Unit represents a contingent right to receive twenty Ordinary Shares or cash in lieu at Amarin’s discretion. This structure links RSU awards directly to Ordinary Shares while allowing settlement flexibility between share delivery and cash payment.
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*
Sterling Louis III

(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)4,452(1)D
American Depositary Shares(1)04/18/2026F(4)403(1)D$14.984,049(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)