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Mersana Therapeutics
MRSN

Overview Fund Activity

132 hedge funds and large institutions have $1.14B invested in Mersana Therapeutics in 2021 Q1 according to their latest regulatory filings, with 18 funds opening new positions, 55 increasing their positions, 46 reducing their positions, and 36 closing their positions.

Holders
132
Holders Change
-19
Holders Change %
-12.58%
% of All Funds
2.32%
Holding in Top 10
3
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-50%
% of All Funds
0.05%
New
18
Increased
55
Reduced
46
Closed
36
Calls
$9.35M
Puts
$9.73M
Net Calls
-$376K
Net Calls Change
-$7.16M

Top Buyers

1
Westfield Capital Management
1
Westfield Capital Management
Massachusetts
$32.3M
2
Wellington Management Group
2
Wellington Management Group
Massachusetts
$100M
3
O
3
OrbiMed
New York
$30.6M
4
SCM
4
Sarissa Capital Management
Connecticut
$64.8M
5
BG
5
Bellevue Group
Switzerland
$46.1M

Top Sellers

1
CCM
1
Consonance Capital Management
New York
$0
2
Janus Henderson Group
2
Janus Henderson Group
United Kingdom
$0
3
Citadel Advisors
3
Citadel Advisors
Florida
$8.71M
4
Invesco
4
Invesco
Georgia
$6.67M
5
GPP
5
Great Point Partners
Connecticut
$0
Name Market Value Shares Shares
Change 		Shares
Change %
Simplex Trading
126
Simplex Trading
Illinois
$16K 1,028 -1,115 -52%
CAPTRUST Financial Advisors
127
CAPTRUST Financial Advisors
North Carolina
$7K 428 -1,572 -79%
Osaic Holdings
128
Osaic Holdings
Arizona
$5K 281 +231 +462%
Daiwa Securities Group
129
Daiwa Securities Group
Japan
$2K 129 – –
TWA
130
TCI Wealth Advisors
Arizona
$2K 106 +106 New
AIG
131
American International Group
New York
$502 31,025 +81 +0.3%
Nisa Investment Advisors
132
Nisa Investment Advisors
Missouri
$154 9,510 -17,100 -64%
CCM
133
Consonance Capital Management
New York
– – -1,401,703 Closed
Janus Henderson Group
134
Janus Henderson Group
United Kingdom
– – -919,101 Closed
GPP
135
Great Point Partners
Connecticut
– – -487,452 Closed
AI
136
Atom Investors
Texas
– – -379,136 Closed
TCM
137
TimesSquare Capital Management
New York
– – -360,100 Closed
TLP
138
Tri Locum Partners
New York
– – -271,974 Closed
SCM
139
Soleus Capital Management
Connecticut
– – -206,844 Closed
Axa
140
Axa
France
– – -205,042 Closed
FIA
141
FNY Investment Advisers
New York
– – -165,200 Closed
PHP
142
Parkman Healthcare Partners
Connecticut
– – -123,031 Closed
IC
143
Ikarian Capital
Texas
– – -106,000 Closed
ACH
144
ArrowMark Colorado Holdings
Colorado
– – -90,000 Closed
IBT
145
International Biotechnology Trust
United Kingdom
– – -72,000 Closed
Connor, Clark & Lunn Investment Management (CC&L)
146
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
– – -60,615 Closed
PGH
147
Partners Group Holding
Switzerland
– – -40,877 Closed
PCM
148
Pathway Capital Management
California
– – -40,600 Closed
ECM
149
ExodusPoint Capital Management
New York
– – -32,704 Closed
Thrivent Financial for Lutherans
150
Thrivent Financial for Lutherans
Minnesota
– – -32,536 Closed
3 4 5
6
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