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Mersana Therapeutics
MRSN

Overview Fund Activity

109 hedge funds and large institutions have $30.3M invested in Mersana Therapeutics in 2025 Q1 according to their latest regulatory filings, with 30 funds opening new positions, 22 increasing their positions, 31 reducing their positions, and 48 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
109
Holders Change
-19
Holders Change %
-14.84%
% of All Funds
1.48%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
30
Increased
22
Reduced
31
Closed
48
Calls
$12K
Puts
$5K
Net Calls
+$7K
Net Calls Change
+$1.68M

Top Buyers

1
SSA
Schonfeld Strategic Advisors
New York
+$1.89M
2
AQR Capital Management
AQR Capital Management
Connecticut
+$1.77M
3
SCM
Silverarc Capital Management
Massachusetts
+$1.06M
4
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$1.03M
5
Vanguard Group
Vanguard Group
Pennsylvania
+$454K

Top Sellers

1
EC
EcoR1 Capital
California
-$16.2M
2
NHAS
Novo Holdings A/S
Denmark
-$6.08M
3
BCM
Boxer Capital Management
California
-$3.77M
4
VA
VR Adviser
New York
-$2.3M
5
ACP
Acuta Capital Partners
California
-$1.6M
Name Holding Trade Value Shares
Change 		Shares
Change %
Citigroup
51
Citigroup
New York
$28.1K -$5.58K -648 -17%
Wells Fargo
52
Wells Fargo
California
$27K +$3.79K +441 +16%
SEI Investments
53
SEI Investments
Pennsylvania
$23.9K – – –
Mirae Asset Global ETFs Holdings
54
Mirae Asset Global ETFs Holdings
Hong Kong
$23.7K +$972 +113 +4%
T. Rowe Price Associates
55
T. Rowe Price Associates
Maryland
$22K – – –
QF
56
QVT Financial
New York
$21.6K – – –
Prudential Financial
57
Prudential Financial
New Jersey
$21.2K +$21.2K +2,461 New
Two Sigma Investments
58
Two Sigma Investments
New York
$18.5K -$54.1K -6,289 -75%
CF
59
Corebridge Financial
Texas
$18.1K -$1.33K -155 -7%
JPMorgan Chase & Co
60
JPMorgan Chase & Co
New York
$17.5K -$855K -99,350 -98%
HF
61
HRT Financial
New York
$16K +$16K +1,860 New
VPIM
62
Vanguard Personalized Indexing Management
California
$14.7K +$14.7K +1,706 New
MFG
63
Merit Financial Group
Georgia
$14.4K +$14.4K +1,676 New
New York State Common Retirement Fund
64
New York State Common Retirement Fund
New York
$13K – – –
SG Americas Securities
65
SG Americas Securities
New York
$12K -$25.9K -3,071 -68%
Walleye Trading
66
Walleye Trading
New York
$10.9K – – –
CAPTRUST Financial Advisors
67
CAPTRUST Financial Advisors
North Carolina
$10.7K +$10.7K +1,245 New
Focus Partners Wealth
68
Focus Partners Wealth
Massachusetts
$10.5K +$10.5K +1,221 New
State Board of Administration of Florida Retirement System
69
State Board of Administration of Florida Retirement System
Florida
$9.91K – – –
ProShare Advisors
70
ProShare Advisors
Maryland
$9.91K -$3.11K -361 -24%
TRCT
71
Tower Research Capital (TRC)
New York
$9.01K +$5.93K +689 +192%
CUAMC
72
China Universal Asset Management Company
China
$8.53K -$491 -57 -5%
Mercer Global Advisors
73
Mercer Global Advisors
Colorado
$8.29K +$8.29K +963 New
CWM
74
CIBC World Markets
New York
$8.19K +$4.53K +527 +124%
JRP
75
Jasper Ridge Partners
California
$7.95K – – –
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