# EDGAR Filing Document

**Accession Number:** 0000897448
**File Stem:** 0000899243-23-008171
**Filing Date:** 2023-3
**Character Count:** 8181
**Document Hash:** 192a382be551101d53bc4ddbdf7fb7b7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000899243-23-008171.hdr.sgml**: 20230310

**ACCESSION NUMBER**: 0000899243-23-008171

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20230228

**FILED AS OF DATE**: 20230310

**DATE AS OF CHANGE**: 20230310

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Horn Keith
- **CENTRAL INDEX KEY:** 0001672836

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-21392
- **FILM NUMBER:** 23725183

**MAIL ADDRESS:**
- **STREET 1:** 204 STATE ROUTE 17B, P.O. BOX 5013
- **STREET 2:** C/O MONTICELLO CASINO AND RACEWAY
- **CITY:** MONTICELLO
- **STATE:** NY
- **ZIP:** 12701
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AMARIN CORP PLC\UK
- **CENTRAL INDEX KEY:** 0000897448
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** X0
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** SPACES SOUTH DOCKLANDS, BLOCK C
- **STREET 2:** 77 SIR JOHN ROGERSON'S QUAY
- **CITY:** DUBLIN 2
- **STATE:** L2
- **ZIP:** D02 VK60
- **BUSINESS PHONE:** 353 1 6699 020

**MAIL ADDRESS:**
- **STREET 1:** SPACES SOUTH DOCKLANDS, BLOCK C
- **STREET 2:** 77 SIR JOHN ROGERSON'S QUAY
- **CITY:** DUBLIN 2
- **STATE:** L2
- **ZIP:** D02 VK60

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMARIN PHARMACEUTICALS PLC
- **DATE OF NAME CHANGE:** 20000201

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ETHICAL HOLDINGS PLC
- **DATE OF NAME CHANGE:** 19930322

## Ex-24

```
<PRE>
                                POWER OF ATTORNEY

                         For Executing Forms 3, 4 and 5

        Know all by these presents, that the undersigned hereby constitutes and
appoints each of Karim Mikhail, Thomas Reilly and Jacqueline Mercier, each
acting singly, the undersigned's true and lawful attorney-in-fact from the date
hereof to:

        (1)     Execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer, director and/or 10% shareholder of Amarin
Corporation plc (the "Company"), forms and authentication documents for EDGAR
Filing Access;

        (2)     execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer, director and/or 10% shareholder of the
Company, Forms 3, 4 and 5 in accordance with Section 16(a) of the Securities
Exchange Act of 1934 and the rules thereunder;

        (3)     do and perform any and all acts for and on behalf of the
undersigned that may be necessary or desirable to complete the execution of any
such Form 3, 4 or 5, complete and execute any amendment or amendments thereto,
and the timely filing of such form with the United States Securities and
Exchange Commission and any other authority; and

        (4)     take any other action of any type whatsoever in connection with
the foregoing which, in the opinion of such attorney-in-fact, may be of benefit
to, in the best interests of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney shall be in such form and
shall contain such terms and conditions as such attorney-in-fact may approve in
his discretion.

        The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform all and every act and thing whatsoever
requisite, necessary, and proper to be done in the exercise of any of the
rights and powers herein granted, as fully for all intents and purposes as the
such attorney-in-fact might or could do if personally present, with full power
of substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or his substitute or substitutes, shall lawfully do or cause
to be done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming
any of the undersigned's responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934, as amended.

        This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

        By this Power of Attorney, the undersigned further revokes all previous
powers of attorney relating to the undersigned's obligations to file Forms 3, 4
and 5 in respect of the Company's securities under Section 16(a) of the
Securities Exchange Act of 1934 and related matters.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this March 2, 2023.

                                   /s/ Keith Horn
                                   -------------------------------
                                   Signature

                                   Keith Horn
                                   -------------------------------
                                   Print Name
</PRE>
```

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Horn Keith<br><sub>(Last) (First) (Middle)</sub><br>C/O AMARIN PHARMA, INC.<br>440 US HIGHWAY 22<br><sub>(Street)</sub><br>BRIDGEWATER, NJ 08807<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>AMARIN CORP PLC\UK [ AMRN ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2023-02-28 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

**Remarks:**
Exhibit 24 - Power of Attorney

**Signature:** By: /s/ Tom Reilly, by power of attorney  
**Date:** 2023-03-10

### Remarks:

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.**