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Mersana Therapeutics
MRSN

Overview Fund Activity

157 hedge funds and large institutions have $437M invested in Mersana Therapeutics in 2023 Q1 according to their latest regulatory filings, with 26 funds opening new positions, 51 increasing their positions, 44 reducing their positions, and 20 closing their positions.

Holders
157
Holders Change
+5
Holders Change %
+3.29%
% of All Funds
2.51%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
26
Increased
51
Reduced
44
Closed
20
Calls
$8.89M
Puts
$662K
Net Calls
+$8.23M
Net Calls Change
+$8.18M

Top Buyers

1
APM
1
Avidity Partners Management
Texas
$14.1M
2
BBA
2
Baker Bros. Advisors
New York
$7.75M
3
B
3
Braidwell
Connecticut
$13.8M
4
5VM
4
5AM Venture Management
California
$4.87M
5
Goldman Sachs
5
Goldman Sachs
New York
$12.1M

Top Sellers

1
Millennium Management
1
Millennium Management
New York
$5.18M
2
ACP
2
Acuta Capital Partners
California
$247K
3
WP
3
Woodline Partners
California
$0
4
LP
4
LMR Partners
United Kingdom
$0
5
OM
5
Opaleye Management
Massachusetts
$0
Name Market Value Shares Shares
Change 		Shares
Change %
O
1
OrbiMed
New York
$37M 9,011,437 – –
BCLSI
2
Bain Capital Life Sciences Investors
Massachusetts
$35.6M 8,663,673 – –
ACA
3
Avoro Capital Advisors
New York
$31M 7,550,000 – –
BlackRock
4
BlackRock
New York
$30.7M 7,473,822 -18,107 -0.2%
State Street
5
State Street
Massachusetts
$26.4M 6,412,222 +556,161 +9%
Vanguard Group
6
Vanguard Group
Pennsylvania
$19.1M 4,638,492 +189,452 +4%
BG
7
Bellevue Group
Switzerland
$17.7M 4,299,619 +17,019 +0.4%
RSCM
8
Rock Springs Capital Management
Maryland
$16.9M 4,103,803 – –
SCM
9
Sarissa Capital Management
Connecticut
$15.6M 3,800,000 -197,010 -5%
APM
10
Avidity Partners Management
Texas
$14.1M 3,433,233 +3,433,233 New
B
11
Braidwell
Connecticut
$13.8M 3,355,805 +1,493,105 +80%
Goldman Sachs
12
Goldman Sachs
New York
$12.1M 2,939,540 +925,044 +46%
CS
13
Candriam SCA
Luxembourg
$11.2M 2,962,848 +270,000 +10%
Marshall Wace
14
Marshall Wace
United Kingdom
$10.3M 2,496,710 -27,274 -1%
AG
15
Artal Group
Luxembourg
$9.11M 2,215,788 +15,788 +0.7%
Morgan Stanley
16
Morgan Stanley
New York
$7.8M 1,898,633 +140,647 +8%
BBA
17
Baker Bros. Advisors
New York
$7.75M 1,886,115 +1,886,115 New
D.E. Shaw & Co
18
D.E. Shaw & Co
New York
$7.42M 1,806,099 -529,840 -23%
Geode Capital Management
19
Geode Capital Management
Massachusetts
$7.39M 1,798,847 +91,377 +5%
Millennium Management
20
Millennium Management
New York
$5.18M 1,261,054 -2,402,473 -66%
Renaissance Technologies
21
Renaissance Technologies
New York
$5.14M 1,250,519 +678,800 +119%
Nuveen Asset Management
22
Nuveen Asset Management
Illinois
$5.1M 1,241,487 +12,080 +1%
ABG
23
Ally Bridge Group
New York
$4.9M 1,191,271 – –
5VM
24
5AM Venture Management
California
$4.87M 1,185,000 +1,185,000 New
Deutsche Bank
25
Deutsche Bank
Germany
$4.72M 1,147,554 +16,850 +1%
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