Amarin Corporation plc
Amarin Corporation plc (AMRN) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · AMRN · as of Mar 31, 2025
Ownership Breakdown
134
Institutional Holders
▼ 32 vs Q4
$30.51M
Total Inst. Value
▼ $3.89M vs Q4
20.68M
Shares Outstanding
freeFloat 100.14%
68.29M
13F Shares Held
▼ 2.59M vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
AMRN largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
SARISSA CAPITAL MANAGEMENT LP pharmaceutical preparations | 24.85M | 29.94% | 29.94% | $11.14B | May 15, 2025 | — held |
KYNAM CAPITAL MANAGEMENT, LP pharmaceutical preparations | 12.41M | 14.96% | 14.96% | $5.56B | May 15, 2025 | — held |
ACADIAN ASSET MANAGEMENT LLC pharmaceutical preparations | 3.79M | 4.57% | 4.57% | $1.69B | May 21, 2025 | ▲ 2.01M |
EVERSEPT PARTNERS, LP pharmaceutical preparations | 3.40M | 4.10% | 4.10% | $1.52B | May 15, 2025 | ▲ 1.88M |
MORGAN STANLEY pharmaceutical preparations | 2.62M | 3.16% | 3.16% | $1.17B | May 15, 2025 | ▼ 1.78M |
WATERFRONT WEALTH INC. pharmaceutical preparations | 2.51M | 3.03% | 3.03% | $1.13B | Apr 25, 2025 | ▲ 32.8K |
SCP INVESTMENT, LP pharmaceutical preparations | 2.50M | 3.01% | 3.01% | $1.12B | May 9, 2025 | — held |
TWO SIGMA INVESTMENTS, LP pharmaceutical preparations | 1.86M | 2.24% | 2.24% | $831.64M | May 15, 2025 | ▼ 317.8K |
BNP PARIBAS ARBITRAGE, SNC pharmaceutical preparations | 1.43M | 1.73% | 1.73% | $641.62M | May 14, 2025 | ▲ 90.9K |
TWO SIGMA ADVISERS, LP pharmaceutical preparations | 1.29M | 1.56% | 1.56% | $579.48M | May 15, 2025 | ▼ 446.1K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
16
Increased
+5.23M shares3
New Positions
first time holders18
Decreased
−3.94M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.29M
+5.23M / −3.94M
Net new holders
+1
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
AMRN insider trading · insider activity
Source: SEC Form 4
2
Buy transactions
1
Sell transactions
2.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Bonfiglio Patrice Eadon director | Apr 18, 2026 | Tax Withhold | 403 | $14.98 | $6.0K | 836 | Form 4 ↗ |
Cohen Paul director | Apr 18, 2026 | Tax Withhold | 403 | $14.98 | $6.0K | 836 | Form 4 ↗ |
Sterling Louis III director | Apr 18, 2026 | Tax Withhold | 403 | $14.98 | $6.0K | 4.0K | Form 4 ↗ |
Sullivan Diane E. director | Apr 18, 2026 | Tax Withhold | 403 | $14.98 | $6.0K | 836 | Form 4 ↗ |
Odysseas Kostas D director | Apr 18, 2026 | Tax Withhold | 403 | $14.98 | $6.0K | 836 | Form 4 ↗ |
Horn Keith director | Apr 18, 2026 | Tax Withhold | 403 | $14.98 | $6.0K | 836 | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Amarin Corporation plc (AMRN) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 0.00%, while retail and public investors account for the remaining 0.14%.
The largest institutional shareholder of Amarin Corporation plc is SARISSA CAPITAL MANAGEMENT LP, holding approximately 24.85 million shares — equal to 29.94% of outstanding shares — as of March 31, 2025.
A total of 134 institutional investors currently hold AMRN stock, with a combined institutional value of approximately $30,509,147 as of the most recent 13F filing period.
Frequently asked questions
AMRN ownershipAmarin Corporation plc (AMRN) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is SARISSA CAPITAL MANAGEMENT LP with a 29.94% stake. Company insiders hold 0.00%. Data sourced from SEC Form 13F as of March 31, 2025.