Amarin Ownership | Who Owns Amarin?

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Amarin Ownership Summary

Amarin is owned by 0.38% institutional investors, 1.96% insiders, and 97.65% retail investors. Longitude is the largest institutional shareholder, holding 0.39% of AMRN shares. Old Westbury Small & Mid Cap Strategies is the top mutual fund, with 0.27% of its assets in Amarin shares.

AMRN Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Amarin	0.38%	1.96%	97.65%
Sector	Healthcare Stocks	232.01%	10.74%	-142.75%
Industry	Biotech Stocks	381.47%	10.55%	-292.02%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Longitude	1.62M	0.39%	$785.70K
Sarissa capital management lp	1.24M	0.30%	$20.35M
Raymond james financial services advisors	685.14K	0.17%	$471.38K
Acadian asset management	580.44K	0.14%	$8.08M
Kynam capital management, lp	576.11K	0.14%	$9.44M
Regis management	350.00K	0.09%	$241.00K
Susquehanna group, llp	338.57K	0.08%	$164.21K
Morgan stanley	330.11K	0.08%	$4.61M
Blackrock	270.06K	0.07%	$185.80K
Cutter & co brokerage	240.02K	0.06%	$117.61K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sarissa capital management lp	1.24M	11.28%	$20.35M
Scp investment, lp	100.00K	1.14%	$1.40M
Kynam capital management, lp	576.11K	0.70%	$9.44M
Waterfront wealth	142.54K	0.43%	$2.27M
Lcm capital management	42.26K	0.28%	$589.77K
Eversept partners, lp	167.28K	0.19%	$2.74M
Longitude	1.62M	0.17%	$785.70K
Hayek kallen investment management	25.82K	0.13%	$423.00K
Regis management	350.00K	0.07%	$241.00K
Entrypoint capital	12.54K	0.07%	$175.02K

Top Buyers

Holder	Shares	% Assets	Change
Susquehanna group, llp	338.57K	-	142.64K
Acadian asset management	580.44K	0.01%	123.86K
Waterfront wealth	142.54K	0.43%	64.58K
Morgan stanley	330.11K	0.00%	60.45K
Newbridge financial services group	37.40K	0.00%	37.40K

Top Sellers

Holder	Shares	% Assets	Change
Dg capital management	-	-	-5.12M
Tang capital management	-	-	-2.50M
Price jennifer c.	-	-	-2.38M
Gsa capital partners llp	-	-	-853.35K
Longitude	1.62M	0.17%	-750.00K

New Positions

Holder	Shares	% Assets	Change	Value
Quadrature capital	18.35K	0.00%	18.35K	$300.32K
Cubist systematic strategies	13.70K	0.00%	13.70K	$224.39K
Graham capital management	13.52K	0.00%	13.52K	$221.46K
Entrypoint capital	12.54K	0.07%	12.54K	$175.02K
Simplex trading	494.00	-	494.00	$6.89K

Sold Out

Holder	Change
Cbiz investment advisory services	-5.00
Principal securities	-9.00
Glenmede investment management, lp	-45.00
Bryn mawr trust	-50.00
Nelson, van denburg & campbell wealth management group	-50.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	53	-44.79%	1,584,464	-60.43%	-	40.86%	21	-44.74%	9	-47.06%
Sep 30, 2025	92	-1.08%	4,002,266	13.70%	-	133.88%	37	48.00%	16	-73.77%
Jun 30, 2025	92	-30.83%	3,509,256	-94.86%	-	122.73%	24	-35.14%	61	60.53%
Mar 31, 2025	133	-19.88%	70,074,553	-1.11%	-	0.29%	37	-30.19%	38	-22.45%
Dec 31, 2024	162	-0.61%	70,801,923	8.16%	17	6.79%	52	33.33%	48	4.35%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Old Westbury Small & Mid Cap Strategies	55.73K	0.27%	6.82K
Waterfront OS	53.77K	0.26%	9.11K
PSM Value Strategy UI	50.00K	0.24%	50.00K
Waterfront OE	37.75K	0.18%	-39.03K
State Street® SPDR® Ptf Dev Wld exUS ETF	16.30K	0.08%	-
SPDR® Portfolio Developed Wld ex-US ETF	14.82K	0.07%	-
SEI International Equity F (SIT)	13.65K	0.07%	-
iShares Nasdaq US Biotech ETF USD Acc	11.93K	0.06%	-
Fidelity Nasdaq Composite Index	11.77K	0.06%	-
Voya Multi-Manager International Sm Cp A	10.54K	0.05%	3.48K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 02, 2024	Berg Aaron	President and CEO	Buy	$102.40K
Jan 22, 2024	Holt Patrick	President and CEO	Buy	$15.72K
Dec 12, 2023	Ketchum Steven B	Chief Scientific Officer	Sell	$26.96K
Aug 16, 2023	Holt Patrick	President and CEO	Buy	$71.26K
Aug 16, 2023	Holt Patrick	President and CEO	Buy	$27.27K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	-
2025 Q4	-	-
2025 Q3	-	-
2025 Q2	-	-
2025 Q1	-	-

AMRN Ownership FAQ

Who Owns Amarin?

Amarin shareholders are primarily institutional investors at 0.38%, followed by 1.96% insiders and 97.66% retail investors. The average institutional ownership in Amarin's industry, Biotech Stocks , is 381.47%, which Amarin falls below.

Who owns the most shares of Amarin?

Amarin’s largest shareholders are Longitude (1.62M shares, 0.39%), Sarissa capital management lp (1.24M shares, 0.30%), and Raymond james financial services advisors (685.14K shares, 0.17%). Together, they hold 0.86% of Amarin’s total shares outstanding.

Does Blackrock own Amarin?

Yes, BlackRock owns 0.07% of Amarin, totaling 270.06K shares as of Jun 2024. This represents 0% of BlackRock's total assets, with a market value of 185.8K$. In the last quarter, BlackRock increased its holdings by 20.35K shares, a 8.15% change.

Who is Amarin’s biggest shareholder by percentage of total assets invested?

Sarissa capital management lp is Amarin’s biggest shareholder by percentage of total assets invested, with 11.28% of its assets in 1.24M Amarin shares, valued at 20.35M$.

Who is the top mutual fund holder of Amarin shares?

Old Westbury Small & Mid Cap Strategies is the top mutual fund holder of Amarin shares, with 0.27% of its total shares outstanding invested in 55.73K Amarin shares.

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