665 hedge funds and large institutions have $35B invested in Insmed in 2026 Q1 according to their latest regulatory filings, with 98 funds opening new positions, 286 increasing their positions, 212 reducing their positions, and 95 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
665
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
26
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$352M
Puts
$232M
Net Calls
Net Calls Change

Top Buyers

1 +$497M
2 +$259M
3 +$248M
4
Capital World Investors
Capital World Investors
California
+$209M
5
D.E. Shaw & Co
D.E. Shaw & Co
New York
+$196M

Top Sellers

1 -$635M
2 -$355M
3 -$146M
4
JFG
Jefferies Financial Group
New York
-$142M
5
Holocene Advisors
Holocene Advisors
New York
-$139M
Name Holding Trade Value Shares
Change
Change in
Stake
Wellington Management Group
76
Wellington Management Group
Massachusetts
$65.3M
Lord, Abbett & Co
77
Lord, Abbett & Co
New Jersey
$65M
Victory Capital Management
78
Victory Capital Management
Texas
$64.8M
PCH
79
Polar Capital Holdings
United Kingdom
$60.2M
GIA
80
Gateway Investment Advisers
Ohio
$59.7M
VAM
81
Vanguard Asset Management
$58.9M
SI
82
Sofinnova Investments
California
$56.6M
California Public Employees Retirement System
83
California Public Employees Retirement System
California
$56.4M
RSCM
84
Rock Springs Capital Management
Maryland
$51.4M
Marshall Wace
85
Marshall Wace
United Kingdom
$51.1M
National Pension Service
86
National Pension Service
South Korea
$51M
California State Teachers Retirement System (CalSTRS)
87
California State Teachers Retirement System (CalSTRS)
California
$49.6M
NCM
88
Nearwater Capital Markets
Ireland
$49.1M
Envestnet Asset Management
89
Envestnet Asset Management
Illinois
$49M
BA
90
Bridgewater Associates
Connecticut
$48.3M
New York State Common Retirement Fund
91
New York State Common Retirement Fund
New York
$48M
Allspring Global Investments
92
Allspring Global Investments
North Carolina
$46.6M
ProShare Advisors
93
ProShare Advisors
Maryland
$46.3M
Aberdeen Group
94
Aberdeen Group
United Kingdom
$45.3M
Barclays
95
Barclays
United Kingdom
$45.1M
RhumbLine Advisers
96
RhumbLine Advisers
Massachusetts
$44.6M
Neuberger Berman Group
97
Neuberger Berman Group
New York
$44.3M
TCM
98
Tang Capital Management
California
$42.5M
Mitsubishi UFJ Asset Management
99
Mitsubishi UFJ Asset Management
Japan
$41.7M
FTM
100
First Turn Management
California
$40.6M