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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
MIM
76
MetLife Investment Management
New Jersey
$64.1K -$55.9K -1,266 -48%
Group One Trading
77
Group One Trading
Illinois
$61.6K +$16.1K +364 +39%
Walleye Trading
78
Walleye Trading
New York
$59.6K
QL
79
Quarry LP
New York
$56.7K +$52.9K +1,200 New
State Board of Administration of Florida Retirement System
80
State Board of Administration of Florida Retirement System
Florida
$54.4K
IIM
81
INTECH Investment Management
Florida
$51.7K +$48.3K +1,094 New
AI
82
Atom Investors
Texas
$46.6K -$601K -13,631 -93%
Acadian Asset Management
83
Acadian Asset Management
Massachusetts
$46K -$83.1K -1,884 -66%
PWLP
84
Prio Wealth Limited Partnership
Massachusetts
$44.5K
JRP
85
Jasper Ridge Partners
California
$43.7K
ProShare Advisors
86
ProShare Advisors
Maryland
$40.5K +$11.6K +263 +44%
Ohio Public Employees Retirement System (OPERS)
87
Ohio Public Employees Retirement System (OPERS)
Ohio
$38.9K
DTL
88
Dynamic Technology Lab
Singapore
$34K +$31.9K +724 New
US Bancorp
89
US Bancorp
Minnesota
$30.6K +$28.5K +647 New
GC
90
Grimes & Company
Massachusetts
$28.3K
HSBC Holdings
91
HSBC Holdings
United Kingdom
$25.7K +$2.56K +58 +12%
Royal Bank of Canada
92
Royal Bank of Canada
Ontario, Canada
$22K +$1.37K +31 +7%
Victory Capital Management
93
Victory Capital Management
Texas
$21.7K -$750 -17 -4%
Legal & General Group
94
Legal & General Group
United Kingdom
$21K
Russell Investments Group
95
Russell Investments Group
United Kingdom
$20.3K +$2.21K +50 +13%
CM
96
Caption Management
Oklahoma
$19.3K
HPCM
97
Hunter Perkins Capital Management
Illinois
$19K
AIP
98
Ameritas Investment Partners
Nebraska
$18.7K
SO
99
STRS Ohio
Ohio
$16.4K
California State Teachers Retirement System (CalSTRS)
100
California State Teachers Retirement System (CalSTRS)
California
$15.5K