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Alnylam Pharmaceuticals

621 hedge funds and large institutions have $34.3B invested in Alnylam Pharmaceuticals in 2025 Q1 according to their latest regulatory filings, with 106 funds opening new positions, 238 increasing their positions, 199 reducing their positions, and 67 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
621
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
10
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$274M
Puts
$238M
Net Calls
Net Calls Change

Top Sellers

1 -$428M
2 -$334M
3 -$103M
4
BlackRock
BlackRock
New York
-$88M
5
Corient Private Wealth
Corient Private Wealth
Florida
-$63.7M
Name Holding Trade Value Shares
Change
Change in
Stake
601
$811
602
$810
603
$810
604
$730
605
$541
606
$541
607
$540
608
$540
609
$540
610
$540
611
$540
612
$540
613
$540
614
$271
615
$271
616
$270
617
$270
618
$270
619
$270
620
$257
621
622
623
624
625