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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 %
BlackRock
1
BlackRock
New York
$83.1M 8,807,328 -15,376 -0.2%
ACA
2
Avoro Capital Advisors
New York
$64.1M 6,800,000 – –
Wellington Management Group
3
Wellington Management Group
Massachusetts
$56.7M 6,007,375 -869,961 -13%
SCM
4
Sarissa Capital Management
Connecticut
$40.5M 4,299,297 +293,697 +7%
BG
5
Bellevue Group
Switzerland
$40.2M 4,261,000 +1,320,000 +45%
State Street
6
State Street
Massachusetts
$38.6M 4,090,196 +843,673 +26%
BCLSI
7
Bain Capital Life Sciences Investors
Massachusetts
$34.9M 3,695,667 – –
Vanguard Group
8
Vanguard Group
Pennsylvania
$34.7M 3,681,594 +500,009 +16%
RSCM
9
Rock Springs Capital Management
Maryland
$28.5M 3,020,702 +175,084 +6%
O
10
OrbiMed
New York
$27.2M 2,888,847 +88,600 +3%
PAMS
11
Pictet Asset Management (Switzerland)
Switzerland
$21.1M 2,237,868 +2,237,868 New
CS
12
Candriam SCA
Luxembourg
$19.1M 2,022,895 +50,000 +3%
Alkeon Capital Management
13
Alkeon Capital Management
New York
$17M 1,799,838 -6,429 -0.4%
AG
14
Artal Group
Luxembourg
$11.3M 1,200,000 – –
Goldman Sachs
15
Goldman Sachs
New York
$10.8M 1,145,369 +568,414 +99%
Geode Capital Management
16
Geode Capital Management
Massachusetts
$10M 1,064,335 +12,416 +1%
CIBC Asset Management
17
CIBC Asset Management
Ontario, Canada
$9.98M 1,058,798 +292 +0%
T. Rowe Price Associates
18
T. Rowe Price Associates
Maryland
$9.25M 980,896 -1,336,851 -58%
Assenagon Asset Management
19
Assenagon Asset Management
Luxembourg
$8.52M 903,866 -137,076 -13%
RCP
20
Rho Capital Partners
New York
$7.51M 796,458 – –
Northern Trust
21
Northern Trust
Illinois
$6.57M 697,013 +14,326 +2%
Morgan Stanley
22
Morgan Stanley
New York
$6.3M 667,889 +541,712 +429%
Two Sigma Advisers
23
Two Sigma Advisers
New York
$5.94M 630,000 +62,400 +11%
Charles Schwab
24
Charles Schwab
California
$4.55M 482,310 +69,837 +17%
Marshall Wace
25
Marshall Wace
United Kingdom
$3.63M 384,736 +364,891 +1,839%
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