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MRSN
Mersana Therapeutics
MRSN
MRSN
Delisted
MRSN was delisted on the 5th of January, 2026.
128 hedge funds and large institutions have $144M invested in Mersana Therapeutics in 2023 Q3 according to their latest regulatory filings, with 26 funds opening new positions, 35 increasing their positions, 43 reducing their positions, and 45 closing their positions.
New
Increased
Maintained
Reduced
Closed
1,963% more call options, than puts
Call options by funds: $1.57M | Put options by funds: $76K
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
0.16% less ownership
Funds ownership: 3.93% → 3.78% (-0.16%)
13% less funds holding
Funds holding: 147 → 128 (-19)
19% less repeat investments, than reductions
Existing positions increased: 35 | Existing positions reduced: 43
42% less first-time investments, than exits
New positions opened: 26 | Existing positions closed: 45
61% less capital invested
Capital invested by funds: $370M → $144M (-$226M)
Holders
128
Holders Change
-19
Holders Change %
-12.93%
% of All Funds
2.03%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.02%
New
26
Increased
35
Reduced
43
Closed
45
Calls
$1.57M
Puts
$76K
Net Calls
+$1.49M
Net Calls Change
-$14.3M
Top Buyers
| 1 |
EC
EcoR1 Capital
San Francisco,
California
|
+$36.8M |
| 2 |
VA
VR Adviser
New York
|
+$21.5M |
| 3 |
SCM
Silverarc Capital Management
Boston,
Massachusetts
|
+$7.61M |
| 4 |
AAA
Affinity Asset Advisors
New York
|
+$5.42M |
| 5 |
PCM
Philosophy Capital Management
Alamo,
California
|
+$4.45M |
Top Sellers
| 1 |
O
OrbiMed
New York
|
-$23.7M |
| 2 |
ACA
Avoro Capital Advisors
New York
|
-$21M |
| 3 |
APM
Avidity Partners Management
Dallas,
Texas
|
-$12.5M |
| 4 |
AG
Artal Group
Luxembourg
|
-$9.97M |
| 5 |
DM
Deerfield Management
New York
|
-$9.49M |
