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MRSN

Mersana Therapeutics
MRSN

Delisted

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

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29 hedge funds and large institutions have $236M invested in Mersana Therapeutics in 2017 Q2 according to their latest regulatory filings, with 29 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.

New
Increased
Maintained
Reduced
Closed

3% more ownership

Funds ownership: 0% → 3% (+3%)

Holders
29
Holders Change
+29
Holders Change %
–
% of All Funds
0.72%
Holding in Top 10
3
Holding in Top 10 Change
+3
Holding in Top 10 Change %
% of All Funds
0.07%
New
29
Increased
–
Reduced
–
Closed
–
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
NMC
NEA Management Company
Maryland
+$113M
2
Wellington Management Group
Wellington Management Group
Massachusetts
+$28.3M
3
Fidelity Investments
Fidelity Investments
Massachusetts
+$24M
4
RSCM
Rock Springs Capital Management
Maryland
+$21.1M
5
PAI
ProQuest Associates IV
Florida
+$13.2M

Top Sellers

No sellers this quarter
Name Holding Trade Value Shares
Change 		Change in
Stake
NMC
1
NEA Management Company
Maryland
$114M +$113M +325,771 New
Wellington Management Group
2
Wellington Management Group
Massachusetts
$28.3M +$28.3M +81,894 New
Fidelity Investments
3
Fidelity Investments
Massachusetts
$23.9M +$24M +69,402 New
RSCM
4
Rock Springs Capital Management
Maryland
$21.3M +$21.1M +61,116 New
PAI
5
ProQuest Associates IV
Florida
$13.4M +$13.2M +38,228 New
RCP
6
Rho Capital Partners
New York
$11.4M +$11.3M +32,721 New
ACH
7
ArrowMark Colorado Holdings
Colorado
$4.89M +$4.84M +14,000 New
JP Morgan Chase
8
JP Morgan Chase
New York
$4.76M +$4.72M +13,641 New
SCM
9
Scopia Capital Management
New York
$2.85M +$2.82M +8,145 New
Alyeska Investment Group
10
Alyeska Investment Group
Illinois
$1.75M +$1.73M +5,000 New
MIM
11
Monashee Investment Management
Massachusetts
$1.51M +$1.49M +4,311 New
CAM
12
Cormorant Asset Management
Massachusetts
$1.11M +$1.1M +3,192 New
Vanguard Group
13
Vanguard Group
Pennsylvania
$1.05M +$1.04M +3,000 New
Tudor Investment Corp
14
Tudor Investment Corp
Connecticut
$989K +$979K +2,831 New
Millennium Management
15
Millennium Management
New York
$853K +$844K +2,441 New
Victory Capital Management
16
Victory Capital Management
Texas
$754K +$747K +2,160 New
Goldman Sachs
17
Goldman Sachs
New York
$699K +$692K +2,000 New
LCM
18
Laurion Capital Management
New York
$699K +$692K +2,000 New
DekaBank Deutsche Girozentrale
19
DekaBank Deutsche Girozentrale
Germany
$676K +$692K +2,000 New
SSA
20
Schonfeld Strategic Advisors
New York
$489K +$484K +1,400 New
HI
21
HBK Investments
Texas
$279K +$277K +800 New
Norges Bank
22
Norges Bank
Norway
$279K +$277K +800 New
ZP
23
Zimmer Partners
New York
$279K +$277K +800 New
Citadel Advisors
24
Citadel Advisors
Florida
$179K +$177K +513 New
Credit Agricole
25
Credit Agricole
France
$70K +$69.2K +200 New
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