We are live on
!
Find out more
MRSN
Mersana Therapeutics
MRSN
MRSN
Delisted
MRSN was delisted on the 5th of January, 2026.
109 hedge funds and large institutions have $647M invested in Mersana Therapeutics in 2021 Q3 according to their latest regulatory filings, with 11 funds opening new positions, 45 increasing their positions, 34 reducing their positions, and 32 closing their positions.
New
Increased
Maintained
Reduced
Closed
32% more repeat investments, than reductions
Existing positions increased: 45 | Existing positions reduced: 34
0.23% less ownership
Funds ownership: 4.06% → 3.83% (-0.23%)
17% less funds holding
Funds holding: 131 → 109 (-22)
22% less call options, than puts
Call options by funds: $1.22M | Put options by funds: $1.57M
32% less capital invested
Capital invested by funds: $955M → $647M (-$308M)
33% less funds holding in top 10
Funds holding in top 10: 3 → 2 (-1)
66% less first-time investments, than exits
New positions opened: 11 | Existing positions closed: 32
Holders
109
Holders Change
-22
Holders Change %
-16.79%
% of All Funds
1.91%
Holding in Top 10
2
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-33.33%
% of All Funds
0.04%
New
11
Increased
45
Reduced
34
Closed
32
Calls
$1.22M
Puts
$1.57M
Net Calls
-$350K
Net Calls Change
+$3.36M
Top Buyers
| 1 |
BG
Bellevue Group
Kuesnacht,
Switzerland
|
+$15.4M |
| 2 |
State Street
Boston,
Massachusetts
|
+$9.86M |
| 3 |
Goldman Sachs
New York
|
+$6.64M |
| 4 |
Morgan Stanley
New York
|
+$6.33M |
| 5 |
Vanguard Group
Malvern,
Pennsylvania
|
+$5.84M |
Top Sellers
| 1 |
Westfield Capital Management
Boston,
Massachusetts
|
-$28.6M |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$15.6M |
| 3 |
Wellington Management Group
Boston,
Massachusetts
|
-$10.2M |
| 4 |
Citadel Advisors
Miami,
Florida
|
-$6.34M |
| 5 |
GTC
Ghost Tree Capital
New York
|
-$6.11M |
