Form 4 Filing for AMARIN CORP PLC

On April 18, 2026, Odysseas Kostas D, a director at AMARIN CORP PLC (AMRN), acquired 838 American Depositary Shares (ADS) through the vesting of Restricted Stock Units (RSUs). These RSUs were granted on April 18, 2024, and vest in three equal installments. Following this acquisition, Odysseas Kostas D holds 1239 ADSs. Additionally, 403 ADSs were disposed of, with a transaction price of $14.98 per share. This disposal was related to tax liabilities upon vesting, as indicated by footnote F4. It is important to note that effective April 11, 2025, the Issuer implemented a ratio change where one ADS represents twenty Ordinary Shares, and all reported securities reflect this change.