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Mersana Therapeutics
MRSN

Overview Fund Activity

109 hedge funds and large institutions have $30.3M invested in Mersana Therapeutics in 2025 Q1 according to their latest regulatory filings, with 30 funds opening new positions, 22 increasing their positions, 31 reducing their positions, and 48 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
109
Holders Change
-19
Holders Change %
-14.84%
% of All Funds
1.48%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
30
Increased
22
Reduced
31
Closed
48
Calls
$12K
Puts
$5K
Net Calls
+$7K
Net Calls Change
+$1.68M

Top Buyers

1
SSA
Schonfeld Strategic Advisors
New York
+$1.89M
2
AQR Capital Management
AQR Capital Management
Connecticut
+$1.77M
3
SCM
Silverarc Capital Management
Massachusetts
+$1.06M
4
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$1.03M
5
Vanguard Group
Vanguard Group
Pennsylvania
+$454K

Top Sellers

1
EC
EcoR1 Capital
California
-$16.2M
2
NHAS
Novo Holdings A/S
Denmark
-$6.08M
3
BCM
Boxer Capital Management
California
-$3.77M
4
VA
VR Adviser
New York
-$2.3M
5
ACP
Acuta Capital Partners
California
-$1.6M
Name Holding Trade Value Shares
Change 		Shares
Change %
NI
1
Nextech Invest
Switzerland
$4.15M – – –
BCLSI
2
Bain Capital Life Sciences Investors
Massachusetts
$2.98M – – –
Vanguard Group
3
Vanguard Group
Pennsylvania
$2.88M +$454K +52,810 +19%
BlackRock
4
BlackRock
New York
$2.87M -$303K -35,160 -10%
SSA
5
Schonfeld Strategic Advisors
New York
$2.62M +$1.89M +219,780 +259%
AQR Capital Management
6
AQR Capital Management
Connecticut
$1.77M +$1.77M +205,750 New
RSCM
7
Rock Springs Capital Management
Maryland
$1.31M +$132K +15,320 +11%
VA
8
VR Adviser
New York
$1.23M -$2.3M -267,339 -65%
SCM
9
Silverarc Capital Management
Massachusetts
$1.06M +$1.06M +123,540 New
Acadian Asset Management
10
Acadian Asset Management
Massachusetts
$1.03M +$1.03M +119,586 New
State Street
11
State Street
Massachusetts
$896K -$55.4K -6,441 -6%
Geode Capital Management
12
Geode Capital Management
Massachusetts
$841K +$26 +3 +0%
CCM
13
Catalio Capital Management
New York
$587K – – –
6CM
14
683 Capital Management
New York
$568K +$258K +30,000 +83%
Jacobs Levy Equity Management
15
Jacobs Levy Equity Management
New Jersey
$459K +$76.1K +8,845 +20%
5VM
16
5AM Venture Management
California
$449K – – –
Qube Research & Technologies (QRT)
17
Qube Research & Technologies (QRT)
United Kingdom
$404K +$285K +33,087 +238%
Northern Trust
18
Northern Trust
Illinois
$298K -$22.3K -2,597 -7%
Renaissance Technologies
19
Renaissance Technologies
New York
$289K +$80.4K +9,346 +39%
Deutsche Bank
20
Deutsche Bank
Germany
$286K – – –
IC
21
IEQ Capital
California
$243K +$243K +28,281 New
LPC
22
Lion Point Capital
New York
$222K +$222K +25,760 New
AV
23
Alamea Verwaltungs
New Jersey
$208K +$208K +24,169 New
Goldman Sachs
24
Goldman Sachs
New York
$202K -$74.3K -8,629 -27%
WP
25
Woodline Partners
California
$150K – – –
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