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MRSN

Mersana Therapeutics

Delisted

MRSN was delisted on the 5th of January, 2026.

120 hedge funds and large institutions have $230M invested in Mersana Therapeutics in 2024 Q2 according to their latest regulatory filings, with 20 funds opening new positions, 44 increasing their positions, 36 reducing their positions, and 22 closing their positions.

New
Increased
Maintained
Reduced
Closed

22% more repeat investments, than reductions

Existing positions increased: 44 | Existing positions reduced: 36

19% more call options, than puts

Call options by funds: $1.5M | Put options by funds: $1.26M

0.14% less ownership

Funds ownership: 3.87%3.73% (-0.14%)

9% less first-time investments, than exits

New positions opened: 20 | Existing positions closed: 22

2% less funds holding

Funds holding: 122120 (-2)

50% less funds holding in top 10

Funds holding in top 10: 21 (-1)

56% less capital invested

Capital invested by funds: $526M → $230M (-$297M)

Holders
120
Holders Change
-2
Holders Change %
-1.64%
% of All Funds
1.73%
Holding in Top 10
1
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-50%
% of All Funds
0.01%
New
20
Increased
44
Reduced
36
Closed
22
Calls
$1.5M
Puts
$1.26M
Net Calls
+$244K
Net Calls Change
+$2.23M
Name Holding Trade Value Shares
Change
Change in
Stake
MIM
126
Monashee Investment Management
Massachusetts
-$1.39M -12,400 Closed
CSS
127
Cubist Systematic Strategies
Connecticut
-$1.07M -9,566 Closed
Canada Pension Plan Investment Board
128
Canada Pension Plan Investment Board
Ontario, Canada
-$918K -8,196 Closed
LIP
129
Lighthouse Investment Partners
Florida
-$580K -5,181 Closed
HS
130
HighVista Strategies
Massachusetts
-$548K -4,893 Closed
PA
131
Profund Advisors
Maryland
-$261K -2,329 Closed
DM
132
Deerfield Management
New York
-$258K -2,299 Closed
AIG
133
American International Group
New York
-$245K -2,186 Closed
Mirae Asset Global Investments
134
Mirae Asset Global Investments
South Korea
-$226K -2,165 Closed
NIM
135
NEOS Investment Management
Connecticut
-$87.2K -779 Closed
EFM
136
E Fund Management
China
-$78K -696 Closed
OAM
137
Oxford Asset Management
United Kingdom
-$74.3K -663 Closed
Mackenzie Financial
138
Mackenzie Financial
Ontario, Canada
-$61.9K -553 Closed
FRM
139
Fox Run Management
Connecticut
-$54.9K -490 Closed
I
140
InceptionR
California
-$50.1K -448 Closed
MLICM
141
Metropolitan Life Insurance Company (MetLife)
New York
-$21K -187 Closed
Pacer Advisors
142
Pacer Advisors
Pennsylvania
-$7.69K -69 Closed
AWM
143
Avior Wealth Management
Nebraska
-$98 -1 Closed
Carson Wealth (CWM LLC)
144
Carson Wealth (CWM LLC)
Nebraska
+$145 +2 New