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Mersana Therapeutics
MRSN

Overview Fund Activity

83 hedge funds and large institutions have $22.9M invested in Mersana Therapeutics in 2025 Q2 according to their latest regulatory filings, with 13 funds opening new positions, 24 increasing their positions, 30 reducing their positions, and 39 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
83
Holders Change
-26
Holders Change %
-23.85%
% of All Funds
1.11%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
13
Increased
24
Reduced
30
Closed
39
Calls
$14K
Puts
$4K
Net Calls
+$10K
Net Calls Change
+$3K

Top Buyers

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

Top Sellers

1
BlackRock
BlackRock
New York
$1.11M
2
VA
VR Adviser
New York
$0
3
State Street
State Street
Massachusetts
$134K
4
SSA
Schonfeld Strategic Advisors
New York
$1.68M
5
Geode Capital Management
Geode Capital Management
Massachusetts
$311K
Name Holding Trade Value Shares
Change 		Shares
Change %
NI
1
Nextech Invest
Switzerland
$3.57M – – –
BCLSI
2
Bain Capital Life Sciences Investors
Massachusetts
$2.56M – – –
Vanguard Group
3
Vanguard Group
Pennsylvania
$2.27M -$207K -27,975 -8%
SSA
4
Schonfeld Strategic Advisors
New York
$1.68M -$574K -77,609 -25%
AQR Capital Management
5
AQR Capital Management
Connecticut
$1.52M -$4.17K -563 -0.3%
RSCM
6
Rock Springs Capital Management
Maryland
$1.13M – – –
BlackRock
7
BlackRock
New York
$1.11M -$1.35M -182,510 -55%
SCM
8
Silverarc Capital Management
Massachusetts
$926K +$11.8K +1,597 +1%
Acadian Asset Management
9
Acadian Asset Management
Massachusetts
$873K -$10.2K -1,375 -1%
Renaissance Technologies
10
Renaissance Technologies
New York
$844K +$595K +80,411 +239%
Millennium Management
11
Millennium Management
New York
$619K +$619K +83,609 New
6CM
12
683 Capital Management
New York
$589K +$101K +13,600 +21%
CCM
13
Catalio Capital Management
New York
$464K -$40.7K -5,504 -8%
Goldman Sachs
14
Goldman Sachs
New York
$424K +$251K +33,884 +144%
Jacobs Levy Equity Management
15
Jacobs Levy Equity Management
New Jersey
$395K -$52 -7 -0%
5VM
16
5AM Venture Management
California
$386K – – –
Geode Capital Management
17
Geode Capital Management
Massachusetts
$311K -$412K -55,725 -57%
LM
18
Luminus Management
Texas
$308K +$308K +41,573 New
Two Sigma Advisers
19
Two Sigma Advisers
New York
$277K +$201K +27,152 +263%
Two Sigma Investments
20
Two Sigma Investments
New York
$244K +$228K +30,785 +1,435%
UBS Group
21
UBS Group
Switzerland
$230K +$135K +18,228 +142%
LPC
22
Lion Point Capital
New York
$191K – – –
IC
23
IEQ Capital
California
$189K -$20.3K -2,743 -10%
AV
24
Alamea Verwaltungs
New Jersey
$179K – – –
Jane Street
25
Jane Street
New York
$151K +$151K +20,447 New
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