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

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934

Filed by the Registrant ☐

Filed by a party other than the Registrant ☒

Check the appropriate box:

☐	Preliminary Proxy Statement

☐	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐	Definitive Proxy Statement

☒	Definitive Additional Materials

☐	Soliciting Material under § 240.14a-12

Amarin Corporation plc

(Name of Registrant as Specified In Its Charter)

Sarissa Capital Catapult Fund LLC

Sarissa Capital Hawkeye Fund LP

ISP Fund LP

Sarissa Capital Offshore Master Fund LP

Sarissa Capital Master Fund II LP

Sarissa Capital Athena Fund Ltd

Atom Master Fund LP

Sarissa Capital Fund GP LP

Sarissa Capital Fund GP LLC

Sarissa Capital Offshore Fund GP LLC

Sarissa Capital Management GP LLC

Sarissa Capital Management LP

Alexander J. Denner, Ph.D.

Patrice Bonfiglio

Paul Cohen, M.D.
Mark DiPaolo
Keith L. Horn
Odysseas Kostas, M.D.

Louis Sterling III
Diane E. Sullivan

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☒	No fee required

☐	Fee paid previously with preliminary materials

☐	Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

This filing contains a social media post by Alexander J. Denner relating to Amarin Corporation plc (the “Company”).

Sarissa Capital Management LP (“Sarissa Capital”), together with other participants including Dr. Denner, filed a definitive proxy statement and an accompanying blue proxy card with the SEC on January 31, 2023, in connection with the solicitation of shareholders of the Company at the general meeting of the Company for the election of Sarissa Capital’s slate of highly-qualified nominees (the “General Meeting”). Shareholders are advised to read the definitive proxy statement and other relevant documents related to the General Meeting as they contain important information.

The definitive proxy statement and other relevant documents are available at no charge on the SEC’s website at www.sec.gov and at www.freeamarin.com. The definitive proxy statement and other relevant documents are also available at no charge by directing a request to Sarissa Capital’s proxy solicitor, D.F. King & Co., Inc., 48 Wall Street, New York, New York 10005 (Shareholders can call toll-free: (800) 331-7024).