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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
EC
1
EcoR1 Capital
California
$36.6M
NI
2
Nextech Invest
Switzerland
$22.8M +$4.48M +101,644 +27%
VA
3
VR Adviser
New York
$21.4M
BCLSI
4
Bain Capital Life Sciences Investors
Massachusetts
$16.4M
BlackRock
5
BlackRock
New York
$16.3M +$420K +9,518 +3%
Vanguard Group
6
Vanguard Group
Pennsylvania
$13.6M +$838K +18,997 +7%
Citadel Advisors
7
Citadel Advisors
Florida
$8.34M +$2.94M +66,718 +61%
RSCM
8
Rock Springs Capital Management
Maryland
$5.76M
State Street
9
State Street
Massachusetts
$5.15M +$76.5K +1,734 +2%
Geode Capital Management
10
Geode Capital Management
Massachusetts
$4.56M -$142K -3,208 -3%
JP Morgan Chase
11
JP Morgan Chase
New York
$4.44M +$661K +14,978 +19%
SSA
12
Schonfeld Strategic Advisors
New York
$4.2M -$1.33M -30,145 -25%
Goldman Sachs
13
Goldman Sachs
New York
$3.7M +$1.26M +28,572 +57%
BC
14
Boxer Capital
California
$3.43M +$3.21M +72,680 New
Deutsche Bank
15
Deutsche Bank
Germany
$3.02M +$35.6K +807 +1%
SCM
16
Silverarc Capital Management
Massachusetts
$3M -$1.61M -36,592 -37%
Morgan Stanley
17
Morgan Stanley
New York
$2.58M -$1.6M -36,335 -40%
5VM
18
5AM Venture Management
California
$2.47M
Verition Fund Management
19
Verition Fund Management
Connecticut
$2.46M +$2.28M +51,688 +11,694%
ACP
20
Acuta Capital Partners
California
$2.27M -$817K -18,520 -28%
EAM
21
Exome Asset Management
New York
$2.23M +$2.08M +47,143 New
BBA
22
Baker Bros. Advisors
New York
$2.05M
D.E. Shaw & Co
23
D.E. Shaw & Co
New York
$1.93M -$782K -17,725 -30%
Jacobs Levy Equity Management
24
Jacobs Levy Equity Management
New Jersey
$1.88M +$896K +20,298 +104%
OCA
25
Octagon Capital Advisors
New York
$1.87M