Comparable stake leader
Sarissa Capital Management LP
SEC ownership of AMARIN CORP PLC\UK
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000897448.
Disclosed value leader
Sarissa Capital Management LP
Comparable rows
3/50
Latest evidence
01 Apr 2026
- Public ticker
- AMRN on Nasdaq
- Parsed ownership sources
- 13F, 13D/G, and 3/4/5
- Largest SEC-reported holder
- Sarissa Capital Management LP
- Latest 13D/G holder
- Sarissa Capital Management LP
- Latest parsed ownership date
- 01 Apr 2026
- Issuer CIK
- 0000897448
- Issuer location
- Dublin 2
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of AMARIN CORP PLC\UK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Sarissa Capital Managemen...
Disclosed value leader
Sarissa Capital Managemen...
Comparable rows
3/50
Latest evidence
01 Apr 2026
13F
13D/G
3/4/5
Lead comparable stake: 8.1%
47 rows are not safely comparable across share classes.
13D/G row: Sarissa Capital Management LP
Showing 1-8 of 50 holder rows.
Quick read
Sarissa Capital Management LP leads the comparable SEC ownership view at 8.1%.
3 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Sarissa Capital Management LP's linked filing trail.
Comparable ownership
Top 3
Sarissa Capital Management LP
8.1%
Brooklands Fund Management Ltd
0%
Winch Advisory Services, LLC
0%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Sarissa Capital Management LP |
13F
13D/G
Company
|
8.1%
from 13D/G
|
$24,197,292
1,673,395 shares
|
— | 31 Mar 2026 |
| Brooklands Fund Management Ltd |
13F
Company
|
0%
|
$225,523
15,596 shares
|
— | 31 Mar 2026 |
| Winch Advisory Services, LLC |
13F
Company
|
0%
|
$101
7 shares
|
— | 31 Mar 2026 |
| ACADIAN ASSET MANAGEMENT LLC |
13F
Company
|
—
class O/S missing
|
$9,182,000
636,769 shares
|
— | 31 Mar 2026 |
| Kynam Capital Management, LP |
13F
Company
|
—
class O/S missing
|
$6,830,644
472,382 shares
|
— | 31 Mar 2026 |
| MILLENNIUM MANAGEMENT LLC |
13F
Company
|
—
class O/S missing
|
$4,345,751
300,536 shares
|
— | 31 Mar 2026 |
| MORGAN STANLEY |
13F
Company
|
—
class O/S missing
|
$4,239,267
293,172 shares
|
— | 31 Mar 2026 |
| John F. Thero |
3/4/5
President and CEO, Director
|
—
mixed-class rows
|
$3,545,500
3,266,224 shares
mixed-class rows
|
— | 30 Jul 2021 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 07 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 33 reporting-owner rows connected to AMARIN CORP PLC\UK. Open a relationship link for the CIK-to-CIK filing trail.
Rows
33
Largest Forms 3/4/5 holder
John F. Thero
Net 12M change
$0
Latest report
18 Apr 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| John F. Thero | President and CEO, Director | $3,545,500 | Mixed | 30 Jul 2021 | ||
| Michael Torok | Director | $3,152,500 | Mixed | 03 Apr 2025 | ||
| Aaron Berg | President and CEO | $2,556,966 | Mixed | 31 Jan 2026 | ||
| Steven B. Ketchum | EVP, Chief Scientific Officer | $630,354 | Mixed | 31 Jan 2026 | ||
| Michael W. Kalb | SVP and CFO | $367,672 | Mixed | 29 Jul 2022 | ||
| Kennedy Joseph T. | General Counsel | $346,467 | Mixed | 30 Jul 2021 | ||
| Patrick Holt | President and CEO, Director | $342,724 | Filing P/S | 22 Jan 2024 | ||
| Karim Mikhail | President and CEO, Director | $309,023 | Mixed | 31 Jan 2023 | ||
| Joseph S. Zakrzewski | Director | $214,236 | Mixed | 14 Dec 2021 | ||
| Peter L. Fishman | Svp, Cfo | $202,723 | Mixed | 01 Apr 2026 | ||
| Olsen Per Wold | Director | $186,419 | Mixed | 10 Jan 2023 | ||
| David Paul Keenan | EVP, Chief Operating Officer | $180,537 | Mixed | 31 Jan 2026 | ||
| Thomas Charles Reilly | EVP and CFO | $65,070 | Mixed | 01 Jul 2024 | ||
| David M. Stack | Director | $43,600 | Mixed | 14 Jun 2021 | ||
| Louis Sterling III | Director | $32,923 | Mixed | 18 Apr 2026 | ||
| Jonathan Provoost | EVP, Chief Legal Officer | $30,712 | Mixed | 01 Feb 2026 | ||
| Marks Jason M. | EVP,Chief Global Legal Officer | $23,890 | Mixed | 19 Aug 2022 | ||
| Diane E. Sullivan | Director | $3,653 | Mixed | 18 Apr 2026 | ||
| Kostas D. Odysseas | Director | $3,653 | Mixed | 18 Apr 2026 | ||
| Keith Horn | Director | $3,653 | Mixed | 18 Apr 2026 |
Recent insider transactions for AMARIN CORP PLC\UK
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Patrice Eadon Bonfiglio | AMRN | American Depositary Shares | Tax liability | -32.5% | -403 | 836 | 18 Apr 2026 | Direct | ||
| Patrice Eadon Bonfiglio | AMRN | American Depositary Shares | Options Exercise | 209% | 838 | 1,239 | 18 Apr 2026 | Direct | ||
| Patrice Eadon Bonfiglio | AMRN | Restricted Stock Unit | Options Exercise | 838 | 838 | 18 Apr 2026 | Direct | |||
| Paul Cohen | AMRN | American Depositary Shares | Tax liability | -32.5% | -403 | 836 | 18 Apr 2026 | Direct | ||
| Paul Cohen | AMRN | American Depositary Shares | Options Exercise | 209% | 838 | 1,239 | 18 Apr 2026 | Direct | ||
| Paul Cohen | AMRN | Restricted Stock Unit | Options Exercise | 838 | 838 | 18 Apr 2026 | Direct | |||
| Louis Sterling III | AMRN | American Depositary Shares | Tax liability | -9.05% | -403 | 4,049 | 18 Apr 2026 | Direct | ||
| Louis Sterling III | AMRN | American Depositary Shares | Options Exercise | 23.2% | 838 | 4,452 | 18 Apr 2026 | Direct | ||
| Louis Sterling III | AMRN | Restricted Stock Unit | Options Exercise | 838 | 838 | 18 Apr 2026 | Direct | |||
| Kostas D. Odysseas | AMRN | American Depositary Shares | Tax liability | -32.5% | -403 | 836 | 18 Apr 2026 | Direct | ||
| Kostas D. Odysseas | AMRN | American Depositary Shares | Options Exercise | 209% | 838 | 1,239 | 18 Apr 2026 | Direct | ||
| Kostas D. Odysseas | AMRN | Restricted Stock Unit | Options Exercise | 838 | 838 | 18 Apr 2026 | Direct | |||
| Diane E. Sullivan | AMRN | American Depositary Shares | Tax liability | -32.5% | -403 | 836 | 18 Apr 2026 | Direct | ||
| Diane E. Sullivan | AMRN | American Depositary Shares | Options Exercise | 209% | 838 | 1,239 | 18 Apr 2026 | Direct | ||
| Diane E. Sullivan | AMRN | Restricted Stock Unit | Options Exercise | 838 | 838 | 18 Apr 2026 | Direct | |||
| Keith Horn | AMRN | American Depositary Shares | Tax liability | -32.5% | -403 | 836 | 18 Apr 2026 | Direct | ||
| Keith Horn | AMRN | American Depositary Shares | Options Exercise | 209% | 838 | 1,239 | 18 Apr 2026 | Direct | ||
| Keith Horn | AMRN | Restricted Stock Unit | Options Exercise | 838 | 838 | 18 Apr 2026 | Direct | |||
| Oliver O'Connor | AMRN | American Depositary Shares | Tax liability | -35.4% | -438 | 801 | 18 Apr 2026 | Direct | ||
| Oliver O'Connor | AMRN | American Depositary Shares | Options Exercise | 209% | 838 | 1,239 | 18 Apr 2026 | Direct | ||
| Oliver O'Connor | AMRN | Restricted Stock Unit | Options Exercise | 838 | 838 | 18 Apr 2026 | Direct | |||
| Peter L. Fishman | AMRN | American Depositary Shares | Tax liability | -0.99% | -62 | 6,220 | 01 Apr 2026 | Direct | ||
| Peter L. Fishman | AMRN | American Depositary Shares | Options Exercise | 2.03% | 125 | 6,282 | 01 Apr 2026 | Direct | ||
| Peter L. Fishman | AMRN | Restricted Stock Unit | Options Exercise | 125 | 0 | 01 Apr 2026 | Direct | |||
| David Paul Keenan | AMRN | Stock Option (right to buy) | Award | 30,060 | 30,060 | 01 Feb 2026 | Direct | |||
| David Paul Keenan | AMRN | Restricted Stock Unit | Award | 8,013 | 8,013 | 01 Feb 2026 | Direct | |||
| Peter L. Fishman | AMRN | Stock Option (right to buy) | Award | 27,750 | 27,750 | 01 Feb 2026 | Direct | |||
| Peter L. Fishman | AMRN | Restricted Stock Unit | Award | 6,167 | 6,167 | 01 Feb 2026 | Direct | |||
| Jonathan Provoost | AMRN | Stock Option (right to buy) | Award | 36,060 | 36,060 | 01 Feb 2026 | Direct | |||
| Jonathan Provoost | AMRN | Restricted Stock Unit | Award | 8,013 | 8,013 | 01 Feb 2026 | Direct | |||
| Aaron Berg | AMRN | Stock Option (right to buy) | Award | 120,566 | 120,566 | 01 Feb 2026 | Direct | |||
| Aaron Berg | AMRN | Restricted Stock Unit | Award | 26,793 | 26,793 | 01 Feb 2026 | Direct | |||
| Steven B. Ketchum | AMRN | Stock Option (right to buy) | Award | 36,060 | 36,060 | 01 Feb 2026 | Direct | |||
| Steven B. Ketchum | AMRN | Restricted Stock Unit | Award | 8,013 | 8,013 | 01 Feb 2026 | Direct | |||
| David Paul Keenan | AMRN | American Depositary Shares | Tax liability | -16.8% | -2,183 | 10,785 | 31 Jan 2026 | Direct | ||
| David Paul Keenan | AMRN | American Depositary Shares | Options Exercise | 48.9% | 4,179 | 12,718 | 31 Jan 2026 | Direct | ||
| David Paul Keenan | AMRN | Restricted Stock Unit | Options Exercise | 4,179 | 1,933 | 31 Jan 2026 | Direct | |||
| Peter L. Fishman | AMRN | American Depositary Shares | Tax liability | -19.8% | -1,318 | 5,332 | 31 Jan 2026 | Direct | ||
| Peter L. Fishman | AMRN | American Depositary Shares | Options Exercise | 50.2% | 2,396 | 7,165 | 31 Jan 2026 | Direct | ||
| Peter L. Fishman | AMRN | Restricted Stock Unit | Options Exercise | 2,396 | 1,833 | 31 Jan 2026 | Direct | |||
| Aaron Berg | AMRN | American Depositary Shares | Tax liability | -2.73% | -2,298 | 81,725 | 31 Jan 2026 | Direct | ||
| Aaron Berg | AMRN | American Depositary Shares | Options Exercise | 5.26% | 4,179 | 83,658 | 31 Jan 2026 | Direct | ||
| Aaron Berg | AMRN | Restricted Stock Unit | Options Exercise | 4,179 | 1,933 | 31 Jan 2026 | Direct | |||
| Steven B. Ketchum | AMRN | American Depositary Shares | Tax liability | -5.43% | -2,297 | 40,008 | 31 Jan 2026 | Direct | ||
| Steven B. Ketchum | AMRN | American Depositary Shares | Options Exercise | 11.1% | 4,179 | 41,941 | 31 Jan 2026 | Direct | ||
| Steven B. Ketchum | AMRN | Restricted Stock Unit | Options Exercise | 4,179 | 1,933 | 31 Jan 2026 | Direct | |||
| Peter L. Fishman | AMRN | American Depositary Shares | Tax liability | -21.1% | -1,356 | 5,079 | 02 Jan 2026 | Direct | ||
| Peter L. Fishman | AMRN | American Depositary Shares | Options Exercise | 61.4% | 2,447 | 6,435 | 02 Jan 2026 | Direct | ||
| Peter L. Fishman | AMRN | Restricted Stock Unit | Award | 2,447 | 2,447 | 02 Jan 2026 | Direct | |||
| David Paul Keenan | AMRN | American Depositary Shares | Tax liability | -16.6% | -1,926 | 9,712 | 02 Jan 2026 | Direct |
* marks a reported price that did not pass the local price check.