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MRSN
Mersana Therapeutics
MRSN
MRSN
Delisted
MRSN was delisted on the 5th of January, 2026.
132 hedge funds and large institutions have $1.14B invested in Mersana Therapeutics in 2021 Q1 according to their latest regulatory filings, with 18 funds opening new positions, 55 increasing their positions, 45 reducing their positions, and 36 closing their positions.
New
Increased
Maintained
Reduced
Closed
22% more repeat investments, than reductions
Existing positions increased: 55 | Existing positions reduced: 45
0.03% more ownership
Funds ownership: 4.03% → 4.06% (+0.03%)
4% less call options, than puts
Call options by funds: $9.35M | Put options by funds: $9.73M
13% less funds holding
Funds holding: 151 → 132 (-19)
38% less capital invested
Capital invested by funds: $1.83B → $1.14B (-$690M)
50% less funds holding in top 10
Funds holding in top 10: 6 → 3 (-3)
50% less first-time investments, than exits
New positions opened: 18 | Existing positions closed: 36
Holders
132
Holders Change
-19
Holders Change %
-12.58%
% of All Funds
2.32%
Holding in Top 10
3
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-50%
% of All Funds
0.05%
New
18
Increased
55
Reduced
45
Closed
36
Calls
$9.35M
Puts
$9.73M
Net Calls
-$376K
Net Calls Change
-$7.16M
Top Buyers
| 1 |
Westfield Capital Management
Boston,
Massachusetts
|
+$29.8M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
+$29.6M |
| 3 |
O
OrbiMed
New York
|
+$21.7M |
| 4 |
SCM
Sarissa Capital Management
Greenwich,
Connecticut
|
+$20.9M |
| 5 |
BG
Bellevue Group
Kuesnacht,
Switzerland
|
+$17.9M |
Top Sellers
| 1 |
CCM
Consonance Capital Management
New York
|
-$37.3M |
| 2 |
Citadel Advisors
Miami,
Florida
|
-$27.5M |
| 3 |
Janus Henderson Group
London,
United Kingdom
|
-$24.5M |
| 4 |
Invesco
Atlanta,
Georgia
|
-$17.8M |
| 5 |
GPP
Great Point Partners
Greenwich,
Connecticut
|
-$13M |
