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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 %
BlackRock
1
BlackRock
New York
$129M 8,002,086 +14,274 +0.2%
ACA
2
Avoro Capital Advisors
New York
$110M 6,800,000 – –
Wellington Management Group
3
Wellington Management Group
Massachusetts
$100M 6,177,793 +1,524,727 +33%
SCM
4
Sarissa Capital Management
Connecticut
$64.8M 4,005,600 +1,078,600 +37%
State Street
5
State Street
Massachusetts
$60.6M 3,746,000 +591,116 +19%
BCLSI
6
Bain Capital Life Sciences Investors
Massachusetts
$59.8M 3,695,667 +250,000 +7%
Vanguard Group
7
Vanguard Group
Pennsylvania
$50.4M 3,117,369 +48,851 +2%
T. Rowe Price Associates
8
T. Rowe Price Associates
Maryland
$48.1M 2,974,087 -330,259 -10%
BG
9
Bellevue Group
Switzerland
$46.1M 2,850,010 +924,000 +48%
RSCM
10
Rock Springs Capital Management
Maryland
$44.9M 2,775,127 +711,460 +34%
Westfield Capital Management
11
Westfield Capital Management
Massachusetts
$32.3M 1,998,638 +1,536,260 +332%
O
12
OrbiMed
New York
$30.6M 1,892,500 +1,119,152 +145%
Alkeon Capital Management
13
Alkeon Capital Management
New York
$29.3M 1,810,505 +5,677 +0.3%
CS
14
Candriam SCA
Luxembourg
$28.7M 1,122,173 +28 +0%
PAMU
15
Pictet Asset Management (UK)
United Kingdom
$27.6M 1,703,899 -18,008 -1%
AG
16
Artal Group
Luxembourg
$19.4M 1,200,000 – –
Goldman Sachs
17
Goldman Sachs
New York
$18.7M 1,157,390 +117,943 +11%
Point72 Asset Management
18
Point72 Asset Management
Connecticut
$16.9M 1,043,100 +121,100 +13%
Geode Capital Management
19
Geode Capital Management
Massachusetts
$15.5M 958,051 +98,750 +11%
RCP
20
Rho Capital Partners
New York
$12.9M 796,458 – –
Fidelity Investments
21
Fidelity Investments
Massachusetts
$11.8M 728,929 -256,326 -26%
PI
22
Putnam Investments
Massachusetts
$11.7M 720,800 +162,900 +29%
Northern Trust
23
Northern Trust
Illinois
$9.6M 593,220 -38,318 -6%
Two Sigma Advisers
24
Two Sigma Advisers
New York
$9.49M 586,700 +96,800 +20%
Citadel Advisors
25
Citadel Advisors
Florida
$8.71M 538,407 -1,416,610 -72%
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