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Alnylam Pharmaceuticals

781 hedge funds and large institutions have $42.4B invested in Alnylam Pharmaceuticals in 2026 Q1 according to their latest regulatory filings, with 103 funds opening new positions, 319 increasing their positions, 254 reducing their positions, and 154 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less ownership

Funds ownership:

less funds holding

Funds holding:

18% less capital invested

Capital invested by funds: $51.7B → $42.4B (-$9.26B)

25% less funds holding in top 10

Funds holding in top 10: 43 (-1)

33% less first-time investments, than exits

New positions opened: 103 | Existing positions closed: 154

Holders
781
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
3
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$450M
Puts
$205M
Net Calls
Net Calls Change

Top Buyers

1 +$1.17B
2 +$916M
3 +$546M
4
Two Sigma Investments
Two Sigma Investments
New York
+$468M
5
ClearBridge Investments
ClearBridge Investments
New York
+$258M

Top Sellers

1 -$1.87B
2 -$450M
3 -$448M
4
Invesco
Invesco
Georgia
-$297M
5
1832 Asset Management
1832 Asset Management
Ontario, Canada
-$175M
Name Holding Trade Value Shares
Change
Change in
Stake
CAM
51
Congress Asset Management
Massachusetts
$94.5M
TD Asset Management
52
TD Asset Management
Ontario, Canada
$93.3M
BNP Paribas Financial Markets
53
BNP Paribas Financial Markets
France
$93M
GGHC
54
Gilder Gagnon Howe & Co
New York
$92.7M
Allspring Global Investments
55
Allspring Global Investments
North Carolina
$92.6M
PI
56
PineBridge Investments
New York
$89.8M
Citigroup
57
Citigroup
New York
$87.1M
NAMI
58
Nomura Asset Management International
Pennsylvania
$85.7M
PCH
59
Polar Capital Holdings
United Kingdom
$85.3M
Westfield Capital Management
60
Westfield Capital Management
Massachusetts
$81.2M
WP
61
Woodline Partners
California
$80.7M
Ameriprise
62
Ameriprise
Minnesota
$79.4M
BG
63
Bellevue Group
Switzerland
$77.6M
Pictet Asset Management
64
Pictet Asset Management
Switzerland
$77.5M
Man Group
65
Man Group
United Kingdom
$76.9M
California Public Employees Retirement System
66
California Public Employees Retirement System
California
$75.4M
CS
67
Candriam SCA
Luxembourg
$74.2M
Barclays
68
Barclays
United Kingdom
$73M
VAM
69
Vanguard Asset Management
$72.5M
Royal London Asset Management
70
Royal London Asset Management
United Kingdom
$71.2M
Jacobs Levy Equity Management
71
Jacobs Levy Equity Management
New Jersey
$70.2M
Canada Pension Plan Investment Board
72
Canada Pension Plan Investment Board
Ontario, Canada
$69.1M
Korea Investment Corp
73
Korea Investment Corp
South Korea
$66.3M
California State Teachers Retirement System (CalSTRS)
74
California State Teachers Retirement System (CalSTRS)
California
$65.1M
Victory Capital Management
75
Victory Capital Management
Texas
$64.8M