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MRSN

Mersana Therapeutics

Delisted

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

113 hedge funds and large institutions have $219M invested in Mersana Therapeutics in 2024 Q3 according to their latest regulatory filings, with 11 funds opening new positions, 39 increasing their positions, 32 reducing their positions, and 17 closing their positions.

New
Increased
Maintained
Reduced
Closed

22% more repeat investments, than reductions

Existing positions increased: 39 | Existing positions reduced: 32

0.05% more ownership

Funds ownership: 3.73%3.78% (+0.05%)

0% more funds holding in top 10

Funds holding in top 10: 11 (0)

4% less capital invested

Capital invested by funds: $230M → $219M (-$10.1M)

6% less funds holding

Funds holding: 120113 (-7)

35% less first-time investments, than exits

New positions opened: 11 | Existing positions closed: 17

37% less call options, than puts

Call options by funds: $770K | Put options by funds: $1.23M

Holders
113
Holders Change
-7
Holders Change %
-5.83%
% of All Funds
1.62%
Holding in Top 10
1
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
0.01%
New
11
Increased
39
Reduced
32
Closed
17
Calls
$770K
Puts
$1.23M
Net Calls
-$460K
Net Calls Change
-$704K
Name Holding Trade Value Shares
Change
Change in
Stake
Bank of America
26
Bank of America
North Carolina
$1.87M +$1.47M +33,210 +520%
Northern Trust
27
Northern Trust
Illinois
$1.76M +$58K +1,315 +4%
Qube Research & Technologies (QRT)
28
Qube Research & Technologies (QRT)
United Kingdom
$1.66M -$204K -4,621 -12%
Wellington Management Group
29
Wellington Management Group
Massachusetts
$1.17M +$151K +3,417 +16%
UOC
30
UBS O'Connor
Illinois
$1.08M +$45.4K +1,029 +5%
HP
31
HealthInvest Partners
Sweden
$1.02M +$624K +14,149 +191%
Balyasny Asset Management
32
Balyasny Asset Management
Illinois
$1.01M +$946K +21,433 New
CAM
33
ClariVest Asset Management
California
$1.01M
Barclays
34
Barclays
United Kingdom
$935K +$215K +4,872 +33%
Renaissance Technologies
35
Renaissance Technologies
New York
$931K -$1.69M -38,220 -66%
Two Sigma Advisers
36
Two Sigma Advisers
New York
$920K -$410K -9,300 -32%
UBS Group
37
UBS Group
Switzerland
$895K +$774K +17,542 +1,254%
WP
38
Woodline Partners
California
$819K -$1.82M -41,350 -70%
Jane Street
39
Jane Street
New York
$789K +$177K +4,005 +32%
Bank of New York Mellon
40
Bank of New York Mellon
New York
$703K -$142K -3,226 -18%
PCM
41
Prelude Capital Management
New York
$689K +$644K +14,589 New
XT
42
XTX Topco
Cayman Islands
$656K +$399K +9,033 +186%
Charles Schwab
43
Charles Schwab
California
$591K
Two Sigma Investments
44
Two Sigma Investments
New York
$567K -$791K -17,939 -60%
Fidelity Investments
45
Fidelity Investments
Massachusetts
$525K +$57.1K +1,294 +13%
GCP
46
GSA Capital Partners
United Kingdom
$514K +$377K +8,553 +369%
Millennium Management
47
Millennium Management
New York
$491K -$762K -17,280 -62%
BNP Paribas Financial Markets
48
BNP Paribas Financial Markets
France
$448K -$174K -3,955 -29%
PAM
49
Panagora Asset Management
Massachusetts
$441K -$5.34K -121 -1%
Los Angeles Capital Management
50
Los Angeles Capital Management
California
$358K +$25.1K +569 +8%