Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in AMRN held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Sarissa Capital Management LP | 1.7M | $26.7M | 0.0% | 8.037% | 15.00% |
| 2 | Kynam Capital Management, LP | 533K | $8.5M | +12.8% | 2.560% | 0.47% |
| 3 | MORGAN STANLEY | 224K | $3.6M | -23.7% | 1.074% | 0.00% |
| 4 | Waterfront Wealth Inc. | 214K | $3.2M | +5.2% | 1.027% | 0.49% |
| 5 | Brooklands Fund Management Ltd | 177K | $2.7M | — | 0.852% | 2.14% |
| 6 | Eversept Partners, LP | 145K | $2.3M | -1.6% | 0.698% | 0.12% |
| 7 | CITADEL ADVISORS LLC | 124K | $2.0M | +35.9% | 0.598% | 0.00% |
| 8 | MILLENNIUM MANAGEMENT LLC | 116K | $1.8M | -61.5% | 0.556% | 0.00% |
| 9 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 101K | $1.6M | +5.7% | 0.486% | 0.00% |
| 10 | TWO SIGMA INVESTMENTS, LP | 101K | $1.6M | -6.5% | 0.483% | 0.00% |
| 11 | BNP PARIBAS FINANCIAL MARKETS | 72K | $1.1M | -4.9% | 0.345% | 0.00% |
| 12 | LCM Capital Management Inc | 51K | $819K | +18.2% | 0.247% | 0.36% |
| 13 | RENAISSANCE TECHNOLOGIES LLC | 48K | $771K | +151.2% | 0.232% | 0.00% |
| 14 | JANE STREET GROUP, LLC | 38K | $600K | — | 0.181% | 0.00% |
| 15 | GEORGE KAISER FAMILY FOUNDATION | 37K | $593K | — | 0.179% | 0.06% |
| 16 | SEI INVESTMENTS CO | 29K | $466K | — | 0.140% | 0.00% |
| 17 | STATE STREET CORP | 25K | $399K | +0.3% | 0.120% | 0.00% |
| 18 | Bleakley Financial Group, LLC | 24K | $375K | -0.3% | 0.113% | 0.00% |
| 19 | AMERIPRISE FINANCIAL INC | 19K | $303K | +4.2% | 0.091% | 0.00% |
| 20 | State of New Jersey Common Pension Fund D | 19K | $301K | 0.0% | 0.091% | 0.00% |
| 21 | COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 18K | $293K | 0.0% | 0.088% | 0.00% |
| 22 | RAYMOND JAMES FINANCIAL INC | 18K | $290K | -4.8% | 0.087% | 0.00% |
| 23 | R Squared Ltd | 17K | $270K | — | 0.081% | 0.14% |
| 24 | State of Tennessee, Department of Treasury | 15K | $239K | 0.0% | 0.072% | 0.00% |
| 25 | Quadrature Capital Ltd | 15K | $237K | — | 0.071% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in AMRN — a direct measure of their conviction.
Filings activity in AMRN during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new AMRN position in Q2 2026
Institutions that fully closed their AMRN position in Q2 2026
6 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 80 | +16% | 22.71% | +0.43 pp | $63M | +9.0% |
| Q1 2026 | 69 | 14% | 22.28% | +21.19 pp | $58M | +2.8% |
| Q4 2025 | 80 | 9.1% | 1.09% | +0.06 pp | $57M | 9.7% |
| Q3 2025 | 88 | 1.1% | 1.03% | +0.11 pp | $63M | +10% |
| Q2 2025 | 89 | +709% | 0.92% | +0.90 pp | $57M | +9435% |
| Q1 2025 | 11 | — | 0.02% | — | $1M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying AMRN stock.
Based on Q2 2026 13F filings, institutional ownership of Amarin Corporation plc stands at 22.7%, held across 80 reporting institutions.
Sarissa Capital Management LP is the largest reported institutional holder of AMRN, with approximately 1,673,395 shares worth $0.03B as of Q2 2026.
Yes — 6 widely-followed marquee investors appear among the top 25 institutional holders of AMRN, including CITADEL ADVISORS LLC, MILLENNIUM MANAGEMENT LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, TWO SIGMA INVESTMENTS, LP, RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for AMRN is 79 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
19 institutions opened new positions in AMRN during Q2 2026, while 8 fully exited. 56 added to existing positions and 4 trimmed.
AMRN institutional ownership rose by 0.43 percentage points quarter-over-quarter, with a net change of +11 holders.
The top 10 institutions account for 85.3% of all reported 13F value in AMRN, and the top 25 account for 96.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Amarin Corporation plc (AMRN) Institutional Ownership