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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
EC
1
EcoR1 Capital
California
$38.9M
VA
2
VR Adviser
New York
$22.8M
NI
3
Nextech Invest
Switzerland
$19.1M +$16.4M +226,793 +147%
BCLSI
4
Bain Capital Life Sciences Investors
Massachusetts
$17.4M
BlackRock
5
BlackRock
New York
$16.9M +$833K +11,527 +4%
Vanguard Group
6
Vanguard Group
Pennsylvania
$13.5M +$1.24M +17,126 +7%
RSCM
7
Rock Springs Capital Management
Maryland
$6.12M
SSA
8
Schonfeld Strategic Advisors
New York
$5.98M +$5.69M +78,731 +195%
Citadel Advisors
9
Citadel Advisors
Florida
$5.51M -$2.07M -28,615 -21%
State Street
10
State Street
Massachusetts
$5.39M -$8.14M -112,616 -51%
CAM
11
Cormorant Asset Management
Massachusetts
$5.23M
SCM
12
Silverarc Capital Management
Massachusetts
$5.03M -$1.35M -18,729 -16%
Geode Capital Management
13
Geode Capital Management
Massachusetts
$5.01M +$391K +5,408 +6%
Morgan Stanley
14
Morgan Stanley
New York
$4.57M -$1.94M -26,803 -23%
JP Morgan Chase
15
JP Morgan Chase
New York
$3.97M +$1.59M +21,982 +39%
ACP
16
Acuta Capital Partners
California
$3.34M -$1.45M -20,065 -23%
Deutsche Bank
17
Deutsche Bank
Germany
$3.17M -$26.8K -371 -0.6%
WP
18
Woodline Partners
California
$2.95M -$4.24M -58,693 -50%
D.E. Shaw & Co
19
D.E. Shaw & Co
New York
$2.95M +$703K +9,718 +20%
Renaissance Technologies
20
Renaissance Technologies
New York
$2.91M +$59K +816 +1%
5VM
21
5AM Venture Management
California
$2.62M
Goldman Sachs
22
Goldman Sachs
New York
$2.5M +$1.66M +22,893 +85%
BBA
23
Baker Bros. Advisors
New York
$2.18M
Qube Research & Technologies (QRT)
24
Qube Research & Technologies (QRT)
United Kingdom
$2M +$95.1K +1,315 +3%
OCA
25
Octagon Capital Advisors
New York
$1.99M -$23.1K -320 -0.8%