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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 %
EAM
126
Exome Asset Management
New York
– -$250K -6,917 Closed
Los Angeles Capital Management
127
Los Angeles Capital Management
California
– -$228K -6,390 Closed
Jane Street
128
Jane Street
New York
– -$217K -6,061 Closed
Mackenzie Financial
129
Mackenzie Financial
Ontario, Canada
– -$131K -3,678 Closed
SFI
130
Susquehanna Fundamental Investments
Pennsylvania
– -$131K -3,674 Closed
ETC
131
Exchange Traded Concepts
Oklahoma
– -$122K -3,400 Closed
MIM
132
MetLife Investment Management
New Jersey
– -$105K -2,926 Closed
OAM
133
Oxford Asset Management
United Kingdom
– -$93.5K -2,615 Closed
XT
134
XTX Topco
Cayman Islands
– -$90.8K -2,541 Closed
AF
135
Avanza Fonder
Sweden
– -$80.5K -2,252 Closed
Ameriprise
136
Ameriprise
Minnesota
– -$76.3K -2,133 Closed
PCM
137
Prelude Capital Management
New York
– -$73.4K -2,054 Closed
GCM
138
Graham Capital Management
Connecticut
– -$71.1K -1,989 Closed
CSS
139
Cubist Systematic Strategies
Connecticut
– -$64.8K -1,812 Closed
AI
140
Atom Investors
Texas
– -$38K -1,063 Closed
QL
141
Quarry LP
New York
– -$34.3K -960 Closed
Ohio Public Employees Retirement System (OPERS)
142
Ohio Public Employees Retirement System (OPERS)
Ohio
– -$29.4K -823 Closed
EGM
143
Engineers Gate Manager
New York
– -$24.4K -683 Closed
US Bancorp
144
US Bancorp
Minnesota
– -$23.1K -647 Closed
Marshall Wace
145
Marshall Wace
United Kingdom
– -$22.3K -624 Closed
ACM
146
Aquatic Capital Management
Illinois
– -$20.8K -582 Closed
BCM
147
Bayesian Capital Management
New York
– -$18K -504 Closed
Lazard Asset Management
148
Lazard Asset Management
New York
– -$17K -484 Closed
Squarepoint
149
Squarepoint
New York
– -$17.3K -484 Closed
Russell Investments Group
150
Russell Investments Group
United Kingdom
– -$16.9K -472 Closed
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