185 hedge funds and large institutions have $2.98B invested in Merus in 2025 Q1 according to their latest regulatory filings, with 24 funds opening new positions, 72 increasing their positions, 63 reducing their positions, and 30 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
185
Holders Change
-7
Holders Change %
-3.65%
% of All Funds
2.51%
Holding in Top 10
17
Holding in Top 10 Change
+4
Holding in Top 10 Change %
+30.77%
% of All Funds
0.23%
New
24
Increased
72
Reduced
63
Closed
30
Calls
$17.1M
Puts
$4.13M
Net Calls
+$12.9M
Net Calls Change
+$11.6M
Name Holding Trade Value Shares
Change
Shares
Change %
Fidelity Investments
1
Fidelity Investments
Massachusetts
$293M +$2.84M +67,393 +1%
Wellington Management Group
2
Wellington Management Group
Massachusetts
$199M +$51.4M +1,220,519 +35%
CC
3
Commodore Capital
New York
$188M +$25.2M +598,658 +15%
RI
4
RTW Investments
New York
$175M
PBA
5
Paradigm Biocapital Advisors
New York
$142M +$70.7M +1,679,777 +99%
DM
6
Deerfield Management
New York
$134M +$8.47M +201,141 +7%
ACA
7
Avoro Capital Advisors
New York
$126M +$36.8M +875,000 +41%
SC
8
Samlyn Capital
New York
$100M -$12.2M -288,750 -11%
Franklin Resources
9
Franklin Resources
California
$83.8M +$280K +6,655 +0.3%
Holocene Advisors
10
Holocene Advisors
New York
$78.9M -$269K -6,393 -0.3%
PCH
11
Polar Capital Holdings
United Kingdom
$71.8M +$26.3K +624 +0%
BlackRock
12
BlackRock
New York
$71.2M +$4.41M +104,708 +7%
LCM
13
Lynx1 Capital Management
Puerto Rico
$66M -$505K -12,000 -0.8%
Westfield Capital Management
14
Westfield Capital Management
Massachusetts
$63.2M +$21.4M +508,063 +51%
WP
15
Woodline Partners
California
$58.9M +$8.91M +211,653 +18%
DCM
16
Driehaus Capital Management
Illinois
$52.8M -$1.1M -26,188 -2%
T. Rowe Price Associates
17
T. Rowe Price Associates
Maryland
$46.1M -$887K -21,078 -2%
Federated Hermes
18
Federated Hermes
Pennsylvania
$44M -$23.1M -548,750 -34%
SL
19
Siren LLC
Connecticut
$43.9M +$10.9M +259,055 +33%
Pictet Asset Management
20
Pictet Asset Management
Switzerland
$43.4M +$11.5K +274 +0%
RSCM
21
Rock Springs Capital Management
Maryland
$41.3M +$3.71M +88,202 +10%
UBS Group
22
UBS Group
Switzerland
$36.3M -$10.3M -244,690 -22%
Invesco
23
Invesco
Georgia
$34.9M +$1.76M +41,852 +5%
SCM
24
Silverarc Capital Management
Massachusetts
$34.1M +$5.48M +130,176 +19%
Morgan Stanley
25
Morgan Stanley
New York
$33.8M +$9.61M +228,388 +40%