Amarin Corporation plc is not subject to the UK City Code on Takeovers and Mergers (the “Code”) because the central management and control of Amarin is situated outside the UK. Amarin is therefore not subject to Code requirements, including but not limited to, press release requirements if, under certain circumstances, the company is “the subject of rumour or speculation” or there is an “untoward movement” in the target share price.

Amarin is subject to the UK Companies Act 2016 as a company organized under the law of England and Wales. For more information, please review the public disclosures in our most recent 10-K, page 61-62: https://investor.amarincorp.com/static-files/bfd335ec-2d47-4aa7-8a59-b8a15e5cbaaf.

Despite being a company organized under such law, Amarin has an Irish, and not UK, tax residency for its parent company and for its wholly-owned subsidiary within which Vascepa revenues are recorded.

Amarin's ordinary shares, represented by American Depositary Shares, are listed on the NASDAQ Capital Market under the ticker AMRN.

Until July 16th 2008, Amarin's ordinary shares were also listed on London's AIM (ticker: AMRN) and Dublin's IEX (ticker: H2E).

An American Depositary Share (ADS) is a security that represents an ownership interest in the shares of a foreign company trading on a U.S. securities market. The shares represented by the ADSs are held by a U.S. depositary bank and are evidenced by certificates called American Depositary Receipts (ADRs), although the terms ADS and ADR are often used interchangeably. ADRs enable U.S. investors to buy shares in foreign companies without undertaking cross-border transactions (i.e., in U.S. dollars), and they trade, clear and settle in accordance with U.S. market regulations and conventions.

Non-U.S. companies whose securities trade on a U.S. securities market.

One Amarin ADR equals one Amarin ordinary share.

Holders of ADRs may authorize Citibank, Amarin's Depositary, to act as a proxy in exercising voting rights according to the number of ordinary shares represented by their respective ADRs.

Amarin's fiscal year is the 12-month calendar year ending December 31st.

lease visit our website at www.amarincorp.com where you can read more on our executive team, board of directors, company strategy, corporate governance, therapeutic focus, product pipeline and partnering activities.

Amarin is headquartered in Dublin, Ireland.

Amarin's financial statements, including annual reports, can be found on Amarin's website www.amarincorp.com in the Investor Relations section here. Alternatively, you can find all of Amarin's filings with the U.S. Securities and Exchange Commission under the SEC Filings section of the website here.

The U.S. Transfer Agent for Amarin's ADS holders is:

Citibank Shareholder Services
P.O. Box 43077
Providence, RI 02940-5000
USA
Tel: +1-877-248-4237

The Registrar for Amarin's ordinary shares is:

Citi - Depositary Receipt Services
388 Greenwich Street
14th Floor
New York, NY 10013

AND

Equiniti
PO Box 4630,
Aspect House,
Spencer Road,
Lancing, West Sussex,
BN99 6QQ, England
Telephone: +44 121 415 7047

The Depositary for Amarin's ADRs is:

Citibank Shareholder Services
P.O. Box 43077
Providence, RI 02940-5000
Tel: +1-877-248-4237 Fax: +1-201-324-3284

citibank@shareholders-online.com

Ernst & Young LLP
99 Wood Avenue South
Iselin, NJ 08830

Please contact:
e-mail: investor.relations@amarincorp.com

Amarin has a general policy to not comment on rumors or speculation, or stock price movement related to such rumors or speculation. A “no comment” comment from Amarin is neither confirmation nor denial of any given rumor or speculation; it simply relays that Amarin has no comment on the matter.