Amarin Corp Plcuk
AMRN- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0000897448
No open-market purchases or sales by Amarin Corp Plcuk insiders were filed in the last 90 days; 81 institutions reported holding it in 13F filings for Q2 2026, worth $73.4M in total; no superinvestor holds it.
Holders of 5% or more of AMRN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Amarin Corp Plcuk, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Sarissa Capital Management LP | 13D/A | 6.09%25.7M shares | −1.99 ppfrom 8.08% | Jan 24, 202217 filings | Aug 27, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
21 Schedule 13D and 13G filings on Amarin Corp Plcuk, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 27, 20266:56 PM ET | Sarissa Capital Management LPand 1 other | 13D/A | 6.09%25.7M shares | −1.99 ppfrom 8.08% | Aug 25, 2026 | SEC |
| Mar 25, 20258:37 PM ET | Sarissa Capital Management LPand 1 other | 13D/A | 8.08%33.5M shares | – | Mar 25, 2025 | SEC |
| Dec 8, 2023 | Morgan Stanley | 13G/AOld format | – | – | – | SEC |
| Dec 5, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Sep 5, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Feb 28, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Feb 27, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Feb 21, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Feb 15, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Feb 10, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Feb 8, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Feb 8, 2023 | Morgan Stanley | 13GOld format | – | New | – | SEC |
| Jan 19, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Jan 11, 2023 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Dec 12, 2022 | Baker Bros. Advisors LP | 13G/AOld format | – | – | – | SEC |
| Oct 11, 2022 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Jun 16, 2022 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Jun 3, 2022 | Sarissa Capital Management LP | 13D/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Baker Bros. Advisors LP | 13G/AOld format | – | – | – | SEC |
| Jan 24, 2022 | Sarissa Capital Management LP | 13DOld format | – | New | – | SEC |
Form 144: proposed insider sales
1 notice from officers, directors and other affiliates planning to sell Amarin Corp Plcuk shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Dec 12, 20234:20 PM ET | Steven B. KetchumOfficer | 34.1K | $28.6K | Dec 12, 202310b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |