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MRSN

Mersana Therapeutics

Delisted

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

Name Holding Trade Value Shares
Change
Change in
Stake
NMC
1
NEA Management Company
Maryland
$145M
Wellington Management Group
2
Wellington Management Group
Massachusetts
$48.6M -$3.99M -9,097 -8%
ACH
3
ArrowMark Colorado Holdings
Colorado
$22.3M +$5.59M +12,743 +34%
BlackRock
4
BlackRock
New York
$18M +$3.31M +7,534 +23%
RSCM
5
Rock Springs Capital Management
Maryland
$17.9M -$5.27M -12,000 -23%
PAI
6
ProQuest Associates IV
Florida
$17.1M
RCP
7
Rho Capital Partners
New York
$14.2M
GTC
8
Ghost Tree Capital
New York
$10.7M +$5.65M +12,870 +116%
Vanguard Group
9
Vanguard Group
Pennsylvania
$7.99M +$447K +1,019 +6%
Fidelity International
10
Fidelity International
Bermuda
$6.34M -$2.08M -4,734 -25%
JP Morgan Chase
11
JP Morgan Chase
New York
$5.26M -$244K -555 -5%
Fidelity Investments
12
Fidelity Investments
Massachusetts
$4.58M -$2.19K -5 -0%
State Street
13
State Street
Massachusetts
$3.11M +$425K +968 +16%
Point72 Asset Management
14
Point72 Asset Management
Connecticut
$2.53M -$495K -1,128 -17%
Northern Trust
15
Northern Trust
Illinois
$2.27M +$272K +619 +14%
Millennium Management
16
Millennium Management
New York
$2.2M +$2.16M +4,922 New
Geode Capital Management
17
Geode Capital Management
Massachusetts
$1.62M +$82.1K +187 +5%
Balyasny Asset Management
18
Balyasny Asset Management
Illinois
$1.48M +$1.45M +3,304 New
Allianz Asset Management
19
Allianz Asset Management
Germany
$1.17M
AllianceBernstein
20
AllianceBernstein
Tennessee
$1.03M +$1.02M +2,316 New
PPA
21
Parametric Portfolio Associates
Washington
$787K +$160K +365 +26%
American Century Companies
22
American Century Companies
Missouri
$776K +$763K +1,739 New
Russell Investments Group
23
Russell Investments Group
United Kingdom
$766K
Bank of New York Mellon
24
Bank of New York Mellon
New York
$564K +$120K +273 +28%
Deutsche Bank
25
Deutsche Bank
Germany
$552K +$242K +552 +81%