Form 4 Filing for Sterling Louis III

This filing details transactions made by Sterling Louis III, a director at AMARIN CORP PLC\UK, on April 18, 2026. Louis III acquired 838 American Depositary Shares (ADS) through the vesting of Restricted Stock Units (RSUs), with each RSU representing twenty Ordinary Shares. This acquisition was adjusted for a prior 1:20 ADS Ratio Change. Concurrently, 403 ADSs were disposed of to cover tax liabilities related to the RSU vesting. Following these transactions, Louis III holds 4452 ADSs directly. The filing also notes the grant of 2,514 RSUs on April 18, 2024, which vest in three equal installments through April 18, 2027.