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Mersana Therapeutics
MRSN

Overview Fund Activity

132 hedge funds and large institutions have $1.14B invested in Mersana Therapeutics in 2021 Q1 according to their latest regulatory filings, with 18 funds opening new positions, 55 increasing their positions, 46 reducing their positions, and 36 closing their positions.

Holders
132
Holders Change
-19
Holders Change %
-12.58%
% of All Funds
2.32%
Holding in Top 10
3
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-50%
% of All Funds
0.05%
New
18
Increased
55
Reduced
46
Closed
36
Calls
$9.35M
Puts
$9.73M
Net Calls
-$376K
Net Calls Change
-$7.16M

Top Buyers

1
Westfield Capital Management
1
Westfield Capital Management
Massachusetts
$32.3M
2
Wellington Management Group
2
Wellington Management Group
Massachusetts
$100M
3
O
3
OrbiMed
New York
$30.6M
4
SCM
4
Sarissa Capital Management
Connecticut
$64.8M
5
BG
5
Bellevue Group
Switzerland
$46.1M

Top Sellers

1
CCM
1
Consonance Capital Management
New York
$0
2
Janus Henderson Group
2
Janus Henderson Group
United Kingdom
$0
3
Citadel Advisors
3
Citadel Advisors
Florida
$8.71M
4
Invesco
4
Invesco
Georgia
$6.67M
5
GPP
5
Great Point Partners
Connecticut
$0
Name Market Value Shares Shares
Change 		Shares
Change %
Barclays
51
Barclays
United Kingdom
$2.03M 125,428 +104,804 +508%
Swiss National Bank
52
Swiss National Bank
Switzerland
$2.03M 125,296 +1,600 +1%
DCM
53
DAFNA Capital Management
California
$2.01M 124,263 +75,000 +152%
Teacher Retirement System of Texas
54
Teacher Retirement System of Texas
Texas
$1.99M 122,938 -14,203 -10%
PIM
55
Platinum Investment Management
Australia
$1.79M 110,906 – –
California Public Employees Retirement System
56
California Public Employees Retirement System
California
$1.75M 108,200 -12,917 -11%
Comerica Bank
57
Comerica Bank
Texas
$1.49M 93,246 +93,246 New
State of Wisconsin Investment Board
58
State of Wisconsin Investment Board
Wisconsin
$1.47M 91,000 +4,100 +5%
TD Asset Management
59
TD Asset Management
Ontario, Canada
$1.41M 87,357 -2,432 -3%
UBS Group
60
UBS Group
Switzerland
$1.41M 87,081 +80,726 +1,270%
AAA
61
Affinity Asset Advisors
New York
$1.38M 85,000 +35,000 +70%
Principal Financial Group
62
Principal Financial Group
Iowa
$1.31M 81,156 +3,373 +4%
California State Teachers Retirement System (CalSTRS)
63
California State Teachers Retirement System (CalSTRS)
California
$1.3M 80,270 -290 -0.4%
AllianceBernstein
64
AllianceBernstein
Tennessee
$1.17M 72,000 -6,300 -8%
RhumbLine Advisers
65
RhumbLine Advisers
Massachusetts
$1.1M 67,872 -2,168 -3%
Jane Street
66
Jane Street
New York
$1.03M 63,335 -19,985 -24%
QF
67
QVT Financial
New York
$1.01M 62,657 +62,657 New
First Trust Advisors
68
First Trust Advisors
Illinois
$966K 59,685 +14,688 +33%
Squarepoint
69
Squarepoint
New York
$897K 55,415 +10,228 +23%
CS
70
Credit Suisse
Switzerland
$863K 53,442 -59,798 -53%
Fidelity International
71
Fidelity International
Bermuda
$848K 52,415 +52,415 New
New York State Common Retirement Fund
72
New York State Common Retirement Fund
New York
$781K 48,300 – –
AQR Capital Management
73
AQR Capital Management
Connecticut
$751K 46,415 +5,865 +14%
SSA
74
Schonfeld Strategic Advisors
New York
$743K 45,902 -107,435 -70%
PPA
75
Parametric Portfolio Associates
Washington
$644K 39,801 +16,951 +74%
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3
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