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Mersana Therapeutics
MRSN

Overview Fund Activity

110 hedge funds and large institutions have $647M invested in Mersana Therapeutics in 2021 Q3 according to their latest regulatory filings, with 12 funds opening new positions, 45 increasing their positions, 34 reducing their positions, and 32 closing their positions.

Holders
110
Holders Change
-21
Holders Change %
-16.03%
% of All Funds
1.93%
Holding in Top 10
2
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-33.33%
% of All Funds
0.04%
New
12
Increased
45
Reduced
34
Closed
32
Calls
$1.22M
Puts
$1.57M
Net Calls
-$350K
Net Calls Change
+$3.36M

Top Buyers

1
PAMS
1
Pictet Asset Management (Switzerland)
Switzerland
$21.1M
2
BG
2
Bellevue Group
Switzerland
$40.2M
3
State Street
3
State Street
Massachusetts
$38.6M
4
Goldman Sachs
4
Goldman Sachs
New York
$10.8M
5
Morgan Stanley
5
Morgan Stanley
New York
$6.3M

Top Sellers

1
Westfield Capital Management
1
Westfield Capital Management
Massachusetts
$0
2
T. Rowe Price Associates
2
T. Rowe Price Associates
Maryland
$9.25M
3
Wellington Management Group
3
Wellington Management Group
Massachusetts
$56.7M
4
GTC
4
Ghost Tree Capital
New York
$0
5
CC
5
Commodore Capital
New York
$0
Name Market Value Shares Shares
Change 		Shares
Change %
Osaic Holdings
101
Osaic Holdings
Arizona
$8K 877 +63 +8%
OSAM
102
O'Shaughnessy Asset Management
Connecticut
$6K 651 – –
PNC Financial Services Group
103
PNC Financial Services Group
Pennsylvania
$5K 478 -12,640 -96%
CAPTRUST Financial Advisors
104
CAPTRUST Financial Advisors
North Carolina
$4K 428 – –
Simplex Trading
105
Simplex Trading
Illinois
$2K 173 -100 -37%
Daiwa Securities Group
106
Daiwa Securities Group
Japan
$2K 246 +117 +91%
Walleye Capital
107
Walleye Capital
New York
$1.13K 119,302 +80,487 +207%
NSIM
108
North Star Investment Management
Illinois
$1K 150 +150 New
Nisa Investment Advisors
109
Nisa Investment Advisors
Missouri
$6 610 -3,050 -83%
Westfield Capital Management
110
Westfield Capital Management
Massachusetts
– – -2,108,810 Closed
GTC
111
Ghost Tree Capital
New York
– – -450,000 Closed
CC
112
Commodore Capital
New York
– – -429,228 Closed
SCM
113
Sio Capital Management
New York
– – -157,259 Closed
SO
114
STRS Ohio
Ohio
– – -153,742 Closed
Comerica Bank
115
Comerica Bank
Texas
– – -147,312 Closed
SCM
116
Silverarc Capital Management
Massachusetts
– – -125,123 Closed
B
117
Bailard
California
– – -111,000 Closed
AAA
118
Affinity Asset Advisors
New York
– – -85,000 Closed
MS
119
Maven Securities
Jersey
– – -84,469 Closed
Qube Research & Technologies (QRT)
120
Qube Research & Technologies (QRT)
United Kingdom
– – -62,685 Closed
HS
121
HighVista Strategies
Massachusetts
– – -59,906 Closed
CM
122
Caption Management
Oklahoma
– – -54,700 Closed
Fidelity International
123
Fidelity International
Bermuda
– – -52,415 Closed
EGM
124
Engineers Gate Manager
New York
– – -43,592 Closed
Squarepoint
125
Squarepoint
New York
– – -42,507 Closed
2 3 4
5
6