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MRSN
Mersana Therapeutics
MRSN
MRSN
Delisted
MRSN was delisted on the 5th of January, 2026.
46 hedge funds and large institutions have $198M invested in Mersana Therapeutics in 2018 Q3 according to their latest regulatory filings, with 3 funds opening new positions, 21 increasing their positions, 8 reducing their positions, and 10 closing their positions.
New
Increased
Maintained
Reduced
Closed
163% more repeat investments, than reductions
Existing positions increased: 21 | Existing positions reduced: 8
0.08% more ownership
Funds ownership: 3.34% → 3.42% (+0.08%)
13% less funds holding
Funds holding: 53 → 46 (-7)
25% less funds holding in top 10
Funds holding in top 10: 4 → 3 (-1)
42% less capital invested
Capital invested by funds: $342M → $198M (-$144M)
70% less first-time investments, than exits
New positions opened: 3 | Existing positions closed: 10
Holders
46
Holders Change
-7
Holders Change %
-13.21%
% of All Funds
1.05%
Holding in Top 10
3
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-25%
% of All Funds
0.07%
New
3
Increased
21
Reduced
8
Closed
10
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–
Top Buyers
| 1 |
ACH
ArrowMark Colorado Holdings
Denver,
Colorado
|
+$7.9M |
| 2 |
EC
EcoR1 Capital
San Francisco,
California
|
+$6.64M |
| 3 |
Millennium Management
New York
|
+$3.31M |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$2.06M |
| 5 |
Geode Capital Management
Boston,
Massachusetts
|
+$423K |
Top Sellers
| 1 |
GTC
Ghost Tree Capital
New York
|
-$10.7M |
| 2 |
Point72 Asset Management
Stamford,
Connecticut
|
-$2.53M |
| 3 |
AllianceBernstein
Nashville,
Tennessee
|
-$1.03M |
| 4 |
Russell Investments Group
London,
United Kingdom
|
-$766K |
| 5 |
Balyasny Asset Management
Chicago,
Illinois
|
-$623K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
51
Manulife (Manufacturers Life Insurance)
Canada,
Ontario, Canada
| – | -$194K | -434 | Closed |
|
|
SO
52
STRS Ohio
Columbus,
Ohio
| – | -$92.5K | -276 | Closed |
|
|
CSS
53
Cubist Systematic Strategies
Stamford,
Connecticut
| – | -$29K | -65 | Closed |
|
|
PHK
54
Point72 Hong Kong
Hong Kong
| – | -$12K | -27 | Closed |
|
|
PIA
55
Piedmont Investment Advisors
Durham,
North Carolina
| – | -$4K | -9 | Closed |
|
56
SEI Investments
Oaks,
Pennsylvania
| – | -$1K | -1 | Closed |
|