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MRSN
Mersana Therapeutics
MRSN
MRSN
Delisted
MRSN was delisted on the 5th of January, 2026.
50 hedge funds and large institutions have $283M invested in Mersana Therapeutics in 2017 Q4 according to their latest regulatory filings, with 13 funds opening new positions, 17 increasing their positions, 9 reducing their positions, and 5 closing their positions.
New
Increased
Maintained
Reduced
Closed
160% more first-time investments, than exits
New positions opened: 13 | Existing positions closed: 5
89% more repeat investments, than reductions
Existing positions increased: 17 | Existing positions reduced: 9
19% more funds holding
Funds holding: 42 → 50 (+8)
0% more funds holding in top 10
Funds holding in top 10: 3 → 3 (0)
0.05% less ownership
Funds ownership: 3.08% → 3.03% (-0.05%)
6% less capital invested
Capital invested by funds: $302M → $283M (-$19M)
Holders
50
Holders Change
+8
Holders Change %
+19.05%
% of All Funds
1.13%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.07%
New
13
Increased
17
Reduced
9
Closed
5
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–
Top Buyers
| 1 |
Fidelity International
Hamilton,
Bermuda
|
+$8.26M |
| 2 |
ACH
ArrowMark Colorado Holdings
Denver,
Colorado
|
+$7.36M |
| 3 |
BlackRock
New York
|
+$5.47M |
| 4 |
Wellington Management Group
Boston,
Massachusetts
|
+$470K |
| 5 |
Vanguard Group
Malvern,
Pennsylvania
|
+$399K |
Top Sellers
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$25.6M |
| 2 |
Millennium Management
New York
|
-$955K |
| 3 |
LCM
Laurion Capital Management
New York
|
-$865K |
| 4 |
Tudor Investment Corp
Stamford,
Connecticut
|
-$346K |
| 5 |
Citigroup
New York
|
-$305K |
