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Merus
MRUS

Overview Fund Activity

198 hedge funds and large institutions have $3.93B invested in Merus in 2025 Q2 according to their latest regulatory filings, with 47 funds opening new positions, 74 increasing their positions, 63 reducing their positions, and 30 closing their positions.

Holders
198
Holders Change
+13
Holders Change %
+7.03%
% of All Funds
2.66%
Holding in Top 10
21
Holding in Top 10 Change
+4
Holding in Top 10 Change %
+23.53%
% of All Funds
0.28%
New
47
Increased
74
Reduced
63
Closed
30
Calls
$36.1M
Puts
$21.6M
Net Calls
+$14.5M
Net Calls Change
+$1.55M

Top Buyers

1
T. Rowe Price Associates
1
T. Rowe Price Associates
Maryland
$119M
2
Ameriprise
2
Ameriprise
Minnesota
$59.6M
3
PBA
3
Paradigm Biocapital Advisors
New York
$225M
4
Adage Capital Partners
4
Adage Capital Partners
Massachusetts
$43.8M
5
Westfield Capital Management
5
Westfield Capital Management
Massachusetts
$107M

Top Sellers

1
SC
1
Samlyn Capital
New York
$40.2M
2
Wellington Management Group
2
Wellington Management Group
Massachusetts
$196M
3
CC
3
Commodore Capital
New York
$185M
4
BlackRock
4
BlackRock
New York
$55.3M
5
Millennium Management
5
Millennium Management
New York
$831K
Name Market Value Shares Shares
Change 		Shares
Change %
Janus Henderson Group
26
Janus Henderson Group
United Kingdom
$43.6M 829,558 +447,747 +117%
SC
27
Samlyn Capital
New York
$40.2M 765,185 -1,614,243 -68%
NHAS
28
Novo Holdings A/S
Denmark
$39.5M 750,000 -39,129 -5%
SCM
29
Silverarc Capital Management
Massachusetts
$39M 741,972 -69,049 -9%
PA
30
Perceptive Advisors
New York
$37.3M 708,176 +17,691 +3%
JPMorgan Chase & Co
31
JPMorgan Chase & Co
New York
$36.3M 690,945 +395,822 +134%
CP
32
Caligan Partners
New York
$34.6M 656,999 +280,045 +74%
TCM
33
Tang Capital Management
California
$31.6M 600,000 +500,000 +500%
UBS Group
34
UBS Group
Switzerland
$30.4M 577,694 -285,054 -33%
BBA
35
Baker Bros. Advisors
New York
$30.2M 574,377 +350,877 +157%
Capital International Investors
36
Capital International Investors
California
$25.8M 491,244 +491,244 New
Morgan Stanley
37
Morgan Stanley
New York
$24.2M 459,216 -344,372 -43%
T. Rowe Price Investment Management
38
T. Rowe Price Investment Management
Maryland
$24M 456,265 -53,496 -10%
GS
39
Gilead Sciences
California
$23.8M 452,527 – –
SI
40
Sofinnova Investments
California
$21.3M 404,562 +404,562 New
DCM
41
DAFNA Capital Management
California
$21M 398,804 -63,000 -14%
DGM
42
Darwin Global Management
Jersey
$21M 395,738 +395,738 New
OCA
43
Octagon Capital Advisors
New York
$20.5M 389,000 +81,000 +26%
BCM
44
Boxer Capital Management
California
$19.2M 365,000 -335,000 -48%
Citadel Advisors
45
Citadel Advisors
Florida
$17.7M 335,594 +308,605 +1,143%
AGP
46
Artia Global Partners
Florida
$15.6M 296,750 -127,890 -30%
FTM
47
First Turn Management
California
$15.4M 292,964 -170,996 -37%
DTC
48
Deep Track Capital
Connecticut
$14.5M 275,000 +275,000 New
BFM
49
Boothbay Fund Management
New York
$14.4M 272,855 +112,855 +71%
SC
50
Stempoint Capital
New York
$14M 266,094 -80,662 -23%
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