Amarin Corporation plc (AMRN) Ownership
AMRN ownership summary
as of October 17, 2026- Institutions
- 20.8% of shares outstanding
- Insiders
- 37.19% of shares outstanding
- Shares outstanding
- 21.0M
- Float
- 19.4M shares available to trade
- Short interest
- 2.55% 528K shares short
- Days to cover
- 10.31 short interest up 0.5% vs prior month
- Institutions 20.77%
- Insiders 37.19%
- Other investors 42.04%
AMRN top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Sarissa Capital Management LP | 7.92% | 1.7M | $18.9M | — | June 30, 2026 |
| 2 | Acadian Asset Management LLC | 3.41% | 721K | $8.2M | +84,215 (+13.2%) | June 30, 2026 |
| 3 | Kynam Capital Management, LP | 2.52% | 533K | $6.0M | +60,600 (+12.8%) | June 30, 2026 |
| 4 | Morgan Stanley - Brokerage Accounts | 1.06% | 224K | $2.5M | −69,555 (−23.7%) | June 30, 2026 |
| 5 | Waterfront Wealth Inc. | 1.01% | 214K | $2.4M | +10,611 (+5.2%) | June 30, 2026 |
| 6 | Brooklands Fund Management Limited | 0.84% | 177K | $2.0M | +161,729 (+1,037.0%) | June 30, 2026 |
| 7 | Eversept Partners, LP | 0.69% | 145K | $1.6M | −2,419 (−1.6%) | June 30, 2026 |
| 8 | Millennium Management LLC | 0.55% | 116K | $1.3M | −184,728 (−61.5%) | June 30, 2026 |
| 9 | Two Sigma Investments LLC | 0.48% | 101K | $1.1M | −7,031 (−6.5%) | June 30, 2026 |
| 10 | Citadel Advisors Llc | 0.45% | 95K | $1.1M | +14,789 (+18.4%) | June 30, 2026 |
| 11 | BNP Paribas Arbitrage, SA | 0.34% | 72K | $812,923 | −3,690 (−4.9%) | June 30, 2026 |
| 12 | LCM Capital Management, Inc | 0.24% | 51K | $581,418 | +7,900 (+18.2%) | June 30, 2026 |
| 13 | Renaissance Technologies Corp | 0.23% | 48K | $547,537 | +29,113 (+151.2%) | June 30, 2026 |
| 14 | Jane Street Group LLC | 0.18% | 38K | $425,949 | +37,628 (0.0%) | June 30, 2026 |
| 15 | George Kaiser Family Foundation | 0.18% | 37K | $421,183 | +37,207 (0.0%) | June 30, 2026 |
| 16 | SEI Investments Co | 0.14% | 29K | $330,669 | +29,211 (0.0%) | June 30, 2026 |
| 17 | Susquehanna International Group, LLP | 0.14% | 29K | $328,291 | −8,666 (−23.0%) | June 30, 2026 |
| 18 | Arete Wealth Advisors, LLC | 0.13% | 27K | $304,666 | +26,914 (0.0%) | June 30, 2026 |
| 19 | State Street Corp | 0.12% | 25K | $283,181 | +67 (+0.3%) | June 30, 2026 |
| 20 | Bleakley Financial Group LLC | 0.11% | 24K | $266,077 | −59 (−0.3%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 500K shares and 7 cut 276K.
AMRN top mutual fund and ETF holders
11 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Old Westbury Small & Mid Cap Strategies | 0.28% | 58K | $657,658 | +2,367 (+4.2%) | July 31, 2026 |
| 2 | State Street® SPDR® Ptf Dev Wld exUS ETF | 0.08% | 17K | $191,376 | — | September 30, 2026 |
| 3 | SEI International Equity F (SIT) | 0.06% | 14K | $154,563 | — | September 30, 2026 |
| 4 | Voya Multi-Manager International Sm Cp A | 0.05% | 11K | $119,313 | — | June 30, 2026 |
| 5 | Fidelity Nasdaq Composite Index | 0.05% | 10K | $114,015 | −1,699 (−14.4%) | August 31, 2026 |
| 6 | State Street® SPDR® S&P® Intl Sm Cp ETF | 0.05% | 9,547 | $108,072 | — | September 30, 2026 |
| 7 | Nomura Healthcare Fund Class I | 0.04% | 9,500 | $107,540 | — | August 31, 2026 |
| 8 | Steward Values Enhanced International I | 0.03% | 7,131 | $80,723 | +1,234 (+20.9%) | August 31, 2026 |
| 9 | Acadian European SmCp Eq C2-i-0.7500-EUR | 0.02% | 5,141 | $58,196 | — | June 30, 2026 |
| 10 | Hector SICAV FIDE Growth | 0.02% | 3,250 | $36,790 | — | June 30, 2026 |
| 11 | First American Multi-Manager IntlEqInstl | 0.01% | 1,904 | $21,553 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
AMRN insider transactions
latest 4| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-08-02 | Aaron Berg | Buy | $12.80 | 8,000 | $102,400 |
| 2024-01-22 | Patrick Holt | Buy | $21.80 | 721 | $15,718 |
| 2023-12-12 | Steven B Ketchum | Sell | $15.80 | 1,706 | $26,955 |
| 2023-08-16 | Patrick Holt | Buy | $20.80 | 15,000 | $312,000 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
AMRN shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns AMRN
Institutional investors own 20.8% of Amarin's shares and insiders 37.19%. The largest holder is Sarissa Capital Management LP with 7.92% of the shares (1.7M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 7 reduced their stake in the latest filings. Short interest is 2.55% of the float, or 10.31 days of average trading volume. The share count rose 138.3% since 2014.
Related: AMRN analyst forecast, AMRN key metrics. See the AMRN stock overview for the latest quote and news.
AMRN ownership FAQ
Who owns the most Amarin stock?
The largest shareholders of Amarin are Sarissa Capital Management LP (7.92%), Acadian Asset Management LLC (3.41%), Kynam Capital Management, LP (2.52%), Morgan Stanley - Brokerage Accounts (1.06%), Waterfront Wealth Inc. (1.01%).
What percentage of Amarin is owned by institutions?
Institutions hold 20.8% of Amarin's shares outstanding; insiders hold 37.19%.
Which funds own Amarin?
The largest fund holders of Amarin are Old Westbury Small & Mid Cap Strategies (0.28%), State Street® SPDR® Ptf Dev Wld exUS ETF (0.08%), SEI International Equity F (SIT) (0.06%), Voya Multi-Manager International Sm Cp A (0.05%), Fidelity Nasdaq Composite Index (0.05%).
What is Amarin's short interest?
528K shares of Amarin were sold short, 2.55% of the float; at the average daily volume it would take 10.31 days to cover.
Are insiders buying or selling Amarin?
Of the latest 4 reported insider transactions in Amarin (since August 16, 2023), 3 were purchases and 1 were sales.
How many shares of Amarin are outstanding?
Amarin has 21.0M shares outstanding, of which 19.4M are in the public float.