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Mersana Therapeutics
MRSN

Overview Fund Activity

84 hedge funds and large institutions have $22.8M invested in Mersana Therapeutics in 2025 Q2 according to their latest regulatory filings, with 13 funds opening new positions, 23 increasing their positions, 30 reducing their positions, and 40 closing their positions.

Holders
84
Holders Change
-28
Holders Change %
-25%
% of All Funds
1.13%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
13
Increased
23
Reduced
30
Closed
40
Calls
$14K
Puts
$4K
Net Calls
+$10K
Net Calls Change
+$3K

Top Buyers

1
Millennium Management
1
Millennium Management
New York
$619K
2
Renaissance Technologies
2
Renaissance Technologies
New York
$844K
3
LM
3
Luminus Management
Texas
$308K
4
Goldman Sachs
4
Goldman Sachs
New York
$424K
5
Two Sigma Investments
5
Two Sigma Investments
New York
$244K

Top Sellers

1
BlackRock
1
BlackRock
New York
$1.11M
2
VA
2
VR Adviser
New York
$0
3
State Street
3
State Street
Massachusetts
$134K
4
SSA
4
Schonfeld Strategic Advisors
New York
$1.68M
5
Geode Capital Management
5
Geode Capital Management
Massachusetts
$311K
Name Market Value Shares Shares
Change 		Shares
Change %
NI
1
Nextech Invest
Switzerland
$3.57M 12,067,246 – –
BCLSI
2
Bain Capital Life Sciences Investors
Massachusetts
$2.56M 8,663,673 – –
Vanguard Group
3
Vanguard Group
Pennsylvania
$2.27M 7,678,391 -699,376 -8%
SSA
4
Schonfeld Strategic Advisors
New York
$1.68M 5,673,852 -1,940,212 -25%
AQR Capital Management
5
AQR Capital Management
Connecticut
$1.52M 5,129,685 -14,064 -0.3%
RSCM
6
Rock Springs Capital Management
Maryland
$1.13M 3,814,684 – –
BlackRock
7
BlackRock
New York
$1.11M 3,763,419 -4,562,763 -55%
SCM
8
Silverarc Capital Management
Massachusetts
$926K 3,128,421 +39,916 +1%
Acadian Asset Management
9
Acadian Asset Management
Massachusetts
$873K 2,955,280 -34,379 -1%
Renaissance Technologies
10
Renaissance Technologies
New York
$844K 2,850,194 +2,010,275 +239%
Millennium Management
11
Millennium Management
New York
$619K 2,090,235 +2,090,235 New
6CM
12
683 Capital Management
New York
$589K 1,990,000 +340,000 +21%
CCM
13
Catalio Capital Management
New York
$464K 1,567,413 -137,623 -8%
Goldman Sachs
14
Goldman Sachs
New York
$424K 1,433,760 +847,102 +144%
Jacobs Levy Equity Management
15
Jacobs Levy Equity Management
New Jersey
$395K 1,332,945 -179 -0%
5VM
16
5AM Venture Management
California
$386K 1,305,000 – –
Geode Capital Management
17
Geode Capital Management
Massachusetts
$311K 1,049,205 -1,393,123 -57%
LM
18
Luminus Management
Texas
$308K 1,039,314 +1,039,314 New
Two Sigma Advisers
19
Two Sigma Advisers
New York
$277K 937,000 +678,800 +263%
Two Sigma Investments
20
Two Sigma Investments
New York
$244K 823,269 +769,617 +1,434%
UBS Group
21
UBS Group
Switzerland
$230K 775,501 +455,696 +142%
LPC
22
Lion Point Capital
New York
$191K 644,000 – –
IC
23
IEQ Capital
California
$189K 638,452 -68,569 -10%
AV
24
Alamea Verwaltungs
New Jersey
$179K 604,213 – –
Jane Street
25
Jane Street
New York
$151K 511,182 +511,182 New
1
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