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MRSN
Mersana Therapeutics
MRSN
MRSN
Delisted
MRSN was delisted on the 5th of January, 2026.
51 hedge funds and large institutions have $64.8M invested in Mersana Therapeutics in 2025 Q4 according to their latest regulatory filings, with 18 funds opening new positions, 3 increasing their positions, 24 reducing their positions, and 16 closing their positions.
New
Increased
Maintained
Reduced
Closed
162% more capital invested
Capital invested by funds: $24.7M → $64.8M (+$40.1M)
100% more funds holding in top 10
Funds holding in top 10: 1 → 2 (+1)
13% more first-time investments, than exits
New positions opened: 18 | Existing positions closed: 16
4% more funds holding
Funds holding: 49 → 51 (+2)
18.9% less ownership
Funds ownership: 63.81% → 44.91% (-19%)
88% less repeat investments, than reductions
Existing positions increased: 3 | Existing positions reduced: 24
Holders
51
Holders Change
+2
Holders Change %
+4.08%
% of All Funds
0.62%
Holding in Top 10
2
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+100%
% of All Funds
0.02%
New
18
Increased
3
Reduced
24
Closed
16
Calls
$1.74M
Puts
–
Net Calls
+$1.74M
Net Calls Change
+$1.68M
Top Buyers
| 1 |
DMKJ
David M. Knott Jr
|
+$2.12M |
| 2 |
AAA
Affinity Asset Advisors
New York
|
+$1.9M |
| 3 |
GLF
Groupe la Francaise
Paris,
France
|
+$1.17M |
| 4 |
RC
Rangeley Capital
New Canaan,
Connecticut
|
+$1.08M |
| 5 |
GF
Gabelli Funds
Rye,
New York
|
+$898K |
Top Sellers
| 1 |
AV
Alamea Verwaltungs
Edison,
New Jersey
|
-$7.71M |
| 2 |
SSA
Schonfeld Strategic Advisors
New York
|
-$2.12M |
| 3 |
Vanguard Group
Malvern,
Pennsylvania
|
-$1.75M |
| 4 |
SCM
Silverarc Capital Management
Boston,
Massachusetts
|
-$1.04M |
| 5 |
6CM
683 Capital Management
New York
|
-$776K |
