$AMRN

$11.95 -$0.14 (1.16%) Close

$AMRN Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 416.4M shares outstanding

Who owns AMRN?

By type of holder

Institutions 0.0% Insiders 0.0% Everyone else 100.0%

Concentration Top 3 holders own 12.4%

Sarissa Capital Management LP 6.2% · Alexander J Denner 6.2%

Institutional ownership

0.0%

0.0 pts vs last qtr

Institutional holders

-1 vs last qtr

Net shares bought

−15.6K

by institutions in Q2 2026

New / sold out

0 / 1

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

None.

Biggest sellers in Q2 2026

Brooklands Fund Management Ltd SOLD OUT −15.6K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Amarin Corporation PLC in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+95.9%

+7.76% a year

Each share's claim on the business

−48.9%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $234M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years100% 3–5 years0% 1–3 years0% Under 1 year0%

Quarterly turnover

50.0%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting AMRN on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
BF Brooklands Fund Management Ltd	—	—	SOLD OUT	—	0.0%
Shares held by quarter Peak holding15.6K (Q1'26) Change over 8 quarters0 Brooklands Fund Management Ltd's full portfolio →
WA Winch Advisory Services, LLC	7	0.00%	Unchanged	≤2021	0.0%
Shares held by quarter Peak holding144 (Q3'24) Change over 8 quarters−137 Share of the company0.000% Winch Advisory Services, LLC's full portfolio →

Brooklands Fund Management Ltd

—

% of company

—

Change vs last qtr

SOLD OUT

Held since

—

Winch Advisory Services, LLC

% of company

0.00%

Change vs last qtr

Unchanged

Held since

≤2021

Institutional Funds

Mutual funds and ETFs reporting AMRN on Form N-PORT; together they hold 0.4% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
OW Old Westbury Small & Mid Cap Strategies Fund Old Westbury Funds Inc	$203K	352.9K	0.08%	0.00%	January 31, 2025
SP SPDR Portfolio Developed World ex- US ETF SPDR Index Shares Funds	$125K	278.0K	0.07%	0.00%	March 31, 2025

Old Westbury Small & Mid Cap Strategies Fund

Old Westbury Funds Inc

Position value

$203K

% of company

0.08%

% of the fund

0.00%

As of

January 31, 2025

SPDR Portfolio Developed World ex- US ETF

SPDR Index Shares Funds

Position value

$125K

% of company

0.07%

% of the fund

0.00%

As of

March 31, 2025

11 more funds behind a free account

See every fund holding Amarin Corporation PLC and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
SC Sarissa Capital Management LP 5%+ holder 13D · 6.1%	25.7M	6.18%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company6.180% Disclosed stake13D · 6.1% View the 13D/G filing →
AJ Alexander J Denner 5%+ holder 13D · 6.1%	25.7M	6.18%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company6.180% Disclosed stake13D · 6.1% View the 13D/G filing →

Sarissa Capital Management LP

5%+ holder13D · 6.1%

25.7M

% of company

6.18%

Change vs last qtr

—

Held since

—

Alexander J Denner

5%+ holder13D · 6.1%

25.7M

% of company

6.18%

Change vs last qtr

—

Held since

—

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