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Merus
MRUS

Overview Fund Activity

200 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, 75 increasing their positions, 64 reducing their positions, and 30 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
200
Holders Change
+15
Holders Change %
+8.11%
% of All Funds
2.68%
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
75
Reduced
64
Closed
30
Calls
$41.5M
Puts
$31.7M
Net Calls
+$9.78M
Net Calls Change
-$3.16M

Top Buyers

1
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
+$61.3M
2
Ameriprise
Ameriprise
Minnesota
+$54.3M
3
PBA
Paradigm Biocapital Advisors
New York
+$48M
4
Adage Capital Partners
Adage Capital Partners
Massachusetts
+$43.8M
5
Westfield Capital Management
Westfield Capital Management
Massachusetts
+$28.5M

Top Sellers

1
SC
Samlyn Capital
New York
-$84.9M
2
Wellington Management Group
Wellington Management Group
Massachusetts
-$52.2M
3
CC
Commodore Capital
New York
-$49.9M
4
BlackRock
BlackRock
New York
-$33.7M
5
Millennium Management
Millennium Management
New York
-$30M
Name Holding Trade Value Shares
Change 		Shares
Change %
Janus Henderson Group
26
Janus Henderson Group
United Kingdom
$43.6M +$23.5M +447,747 +117%
SC
27
Samlyn Capital
New York
$40.2M -$84.9M -1,614,243 -68%
NHAS
28
Novo Holdings A/S
Denmark
$39.5M -$2.06M -39,129 -5%
SCM
29
Silverarc Capital Management
Massachusetts
$39M -$3.63M -69,049 -9%
PA
30
Perceptive Advisors
New York
$37.3M +$931K +17,691 +3%
JPMorgan Chase & Co
31
JPMorgan Chase & Co
New York
$36.3M +$20.8M +395,822 +134%
CP
32
Caligan Partners
New York
$34.6M +$14.7M +280,045 +74%
TCM
33
Tang Capital Management
California
$31.6M +$26.3M +500,000 +500%
UBS Group
34
UBS Group
Switzerland
$30.4M -$15M -285,054 -33%
BBA
35
Baker Bros. Advisors
New York
$30.2M +$18.5M +350,877 +157%
Capital International Investors
36
Capital International Investors
California
$25.8M +$25.8M +491,244 New
Morgan Stanley
37
Morgan Stanley
New York
$24.2M -$18.1M -344,372 -43%
T. Rowe Price Investment Management
38
T. Rowe Price Investment Management
Maryland
$24M -$2.81M -53,496 -10%
GS
39
Gilead Sciences
California
$23.8M – – –
SI
40
Sofinnova Investments
California
$21.3M +$21.3M +404,562 New
DCM
41
DAFNA Capital Management
California
$21M -$3.31M -63,000 -14%
DGM
42
Darwin Global Management
Jersey
$21M +$21M +395,738 New
OCA
43
Octagon Capital Advisors
New York
$20.5M +$4.26M +81,000 +26%
BCM
44
Boxer Capital Management
California
$19.2M -$17.6M -335,000 -48%
Citadel Advisors
45
Citadel Advisors
Florida
$17.7M +$16.2M +308,605 +1,143%
AGP
46
Artia Global Partners
Florida
$15.6M -$6.73M -127,890 -30%
FTM
47
First Turn Management
California
$15.4M -$8.99M -170,996 -37%
DTC
48
Deep Track Capital
Connecticut
$14.5M +$14.5M +275,000 New
BFM
49
Boothbay Fund Management
New York
$14.4M +$5.94M +112,855 +71%
SC
50
Stempoint Capital
New York
$14M -$4.24M -80,662 -23%
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