Ketchum Steven B 4

4 · AMARIN CORP PLC\UK · Filed Jul 15, 2026

AI-generated summary of this filing

Updated Jul 15, 2026

Amarin (AMRN) EVP Steven Ketchum Receives RSU Vesting; Tax Withheld

What Happened

Steven B. Ketchum, Executive Vice President and Chief Scientific Officer of Amarin Corporation plc (AMRN), had restricted stock units (RSUs) vest on July 1, 2026. The filing shows 3,688 shares acquired via award/conversion (codes A and M) and 1,887 shares withheld to cover tax liability (code F) at $15.94 per share, totaling $30,079 withheld. This was a vesting/award event rather than an open-market purchase or intentional sale.

Key Details

Transaction date: July 1, 2026; Form 4 filed July 15, 2026 (filed 14 days after the transaction; Form 4s are normally due within 2 business days).
Shares acquired: 3,688 (award/conversion; codes A and M).
Shares withheld for taxes: 1,887 at $15.94 each; cash value withheld = $30,079 (code F).
Post-transaction holdings: Not specified in the filing.
Footnotes of note:
- ADS ratio change (F1): effective April 11, 2025 one ADS = 20 ordinary shares; reported amounts reflect that ratio adjustment.
- Original grant (F2): 7,376 RSUs granted Jan 10, 2025; scheduled to vest 50% Jan 2, 2026 and remaining 50% on July 1, 2026.
- Withholding (F4): the 1,887-share disposition represents issuer withholding to satisfy tax liability (not an open-market sale).
- Each RSU represents a contingent right to receive 20 ordinary shares or cash in lieu (F5).
Transaction codes: M = exercise/conversion of derivative; A = award/grant; F = tax withholding.

Context

This was a routine RSU vesting with a cashless-type settlement for taxes (shares withheld by the issuer), not a market sale. Such withholding is standard and does not necessarily signal insider sentiment for buying or selling shares. The delayed filing (filed Jul 15 for a Jul 1 transaction) appears late relative to typical Form 4 timing and may be worth noting for timing compliance.

Form 4

Period: 2026-07-01

EVP, Chief Scientific Officer

Transactions

Exercise/Conversion
American Depositary Shares
[F1][F2][F3]
2026-07-01+3,688→ 44,567 total
Tax Payment
American Depositary Shares
[F1][F4]
2026-07-01$15.94/sh−1,887$30,079→ 42,680 total
Award
Restricted Stock Unit
[F5][F1][F2][F3]
2026-07-01+3,688→ 0 total
Exercise: $0.00→ American Depositary Shares (3,688 underlying)

Footnotes (5)

[F1]Effective April 11, 2025, the Issuer implemented a ratio change that one (1) American Depositary Share ("ADS") currently represents twenty (20) Ordinary Shares ("ADS Ratio Change"). Proportionate adjustments were made to the Issuer's outstanding equity awards. The amount of securities reported on this Form 4 reflect the ADS Ratio Change.
[F2]On January 10, 2025, the Reporting Person was granted 7,376 Restricted Stock Units ("RSUs") under the Amarin Corporation plc 2020 Stock Incentive Plan (the "Plan"). The shares subject to this grant shall vest over eighteen months, with 50% to vest on January 2, 2026 and the remaining balance to vest on July 1, 2026.
[F3]Not applicable.
[F4]Represents withholding by the Issuer of shares in respect of tax liability incident to the vesting of a security issued in accordance with Rule 16b-3, and not a market sale of securities.
[F5]Each RSU represents a contingent right to receive twenty Ordinary Shares or cash in lieu thereof at the Issuer's discretion.

Signature

/s/ Jonathan Provoost, by power of attorney|2026-07-01

1 file