Horn Keith 4
4 · AMARIN CORP PLC\UK · Filed Apr 21, 2026
Research Summary
AI-generated summary of this filing
Amarin (AMRN) Director Keith Horn Exercises RSUs; 403 Shares Withheld
What Happened
Keith Horn, a director of Amarin Corporation plc (AMRN), had a derivative conversion/RSU vesting on April 18, 2026 that resulted in the acquisition of 838 shares. To satisfy tax withholding, 403 of those shares were withheld by the issuer at $14.98 per share, totaling $6,037. The exercise/conversion reported a $0 exercise price; after withholding Horn retained a net 435 shares (838 acquired less 403 withheld).
Key Details
- Transaction date: April 18, 2026; Form 4 filed April 21, 2026 (timely).
- Acquired: 838 shares via exercise/conversion of a derivative (code M) reported at $0.00.
- Withheld (tax payment): 403 shares (code F) at $14.98 each = $6,037 (this withholding is by the issuer, not an open-market sale).
- Shares owned after transaction: not disclosed in the provided excerpt.
- Notable footnotes: amounts reflect a prior ADS ratio change; the reported conversion relates to RSUs granted April 18, 2024 that vest in installments (each RSU represents a contingent right to 20 Ordinary Shares or cash). Footnote clarifies withholding was for tax liability and not a market sale.
Context
This appears to be a routine vesting/conversion of equity awards (RSUs) with issuer withholding to cover taxes — common corporate practice and not an open-market sale. For retail investors, such withholding is neutral procedural activity rather than a direct insider sale signal.
Insider Transaction Report
- Exercise/Conversion
American Depositary Shares
[F1][F2][F3]2026-04-18+838→ 1,239 total - Tax Payment
American Depositary Shares
[F1][F4]2026-04-18$14.98/sh−403$6,037→ 836 total - Exercise/Conversion
Restricted Stock Unit
[F5][F1][F2][F3]2026-04-18+838→ 838 totalExercise: $0.00→ American Depositary Shares (838 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 April 18, 2024, following the conclusion of the Issuer's annual general meeting of shareholders for 2024, the Reporting Person was granted 2,514 RSUs under the Amarin Corporation plc 2020 Stock Incentive Plan (the "Plan"). These RSUs vest in three equal installments on each of April 18, 2025, April 18, 2026 and April 18, 2027.
- [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.