We are live on ! Find out more
MRSN

Mersana Therapeutics
MRSN

Delisted

MRSN was delisted on the 5th of January, 2026.

Back to rankings

56 hedge funds and large institutions have $295M invested in Mersana Therapeutics in 2018 Q1 according to their latest regulatory filings, with 13 funds opening new positions, 29 increasing their positions, 9 reducing their positions, and 7 closing their positions.

New
Increased
Maintained
Reduced
Closed

222% more repeat investments, than reductions

Existing positions increased: 29 | Existing positions reduced: 9

86% more first-time investments, than exits

New positions opened: 13 | Existing positions closed: 7

12% more funds holding

Funds holding: 50 → 56 (+6)

4% more capital invested

Capital invested by funds: $283M → $295M (+$12.3M)

0.26% more ownership

Funds ownership: 3.03% → 3.29% (+0.26%)

0% more funds holding in top 10

Funds holding in top 10: 3 → 3 (0)

Holders
56
Holders Change
+6
Holders Change %
+12%
% of All Funds
1.28%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.07%
New
13
Increased
29
Reduced
9
Closed
7
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
Wellington Management Group
Wellington Management Group
Massachusetts
+$8.4M
2
GTC
Ghost Tree Capital
New York
+$4.39M
3
BlackRock
BlackRock
New York
+$3.8M
4
Vanguard Group
Vanguard Group
Pennsylvania
+$3.8M
5
Point72 Asset Management
Point72 Asset Management
Connecticut
+$2.69M

Top Sellers

1
CAM
Cormorant Asset Management
Massachusetts
-$4.86M
2
Victory Capital Management
Victory Capital Management
Texas
-$952K
3
RSCM
Rock Springs Capital Management
Maryland
-$423K
4
JP Morgan Chase
JP Morgan Chase
New York
-$403K
5
RCP
Rho Capital Partners
New York
-$341K
Name Holding Trade Value Shares
Change 		Change in
Stake
BBHC
51
Brown Brothers Harriman & Co
New York
$18K – – –
AIP
52
Ameritas Investment Partners
Nebraska
$15K +$9.87K +25 +192%
RA
53
Royce & Associates
New York
$7K +$1.19K +3 +21%
Bank of Montreal
54
Bank of Montreal
Ontario, Canada
$3K +$3.16K +8 New
Daiwa Securities Group
55
Daiwa Securities Group
Japan
$2K +$1.97K +5 New
Citigroup
56
Citigroup
New York
$1K -$20.1K -51 -96%
CAM
57
Cormorant Asset Management
Massachusetts
– -$4.86M -11,822 Closed
Victory Capital Management
58
Victory Capital Management
Texas
– -$952K -2,317 Closed
D.E. Shaw & Co
59
D.E. Shaw & Co
New York
– -$280K -681 Closed
Parallax Volatility Advisers
60
Parallax Volatility Advisers
California
– -$12K -30 Closed
Royal Bank of Canada
61
Royal Bank of Canada
Ontario, Canada
– -$1K -2 Closed
STA
62
Summit Trail Advisors
New York
– -$1K -2 Closed
1 2
3