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Alnylam Pharmaceuticals
ALNY

Overview Fund Activity

617 hedge funds and large institutions have $34.2B invested in Alnylam Pharmaceuticals in 2025 Q1 according to their latest regulatory filings, with 107 funds opening new positions, 236 increasing their positions, 197 reducing their positions, and 67 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
617
Holders Change
+32
Holders Change %
+5.47%
% of All Funds
8.38%
Holding in Top 10
10
Holding in Top 10 Change
+6
Holding in Top 10 Change %
+150%
% of All Funds
0.14%
New
107
Increased
236
Reduced
197
Closed
67
Calls
$274M
Puts
$238M
Net Calls
+$35.4M
Net Calls Change
+$6.38M

Top Buyers

1
Fidelity Investments
Fidelity Investments
Massachusetts
+$493M
2
Bank of America
Bank of America
North Carolina
+$174M
3
Invesco
Invesco
Georgia
+$95.9M
4
Vanguard Group
Vanguard Group
Pennsylvania
+$87.3M
5
Point72 Asset Management
Point72 Asset Management
Connecticut
+$81.2M

Top Sellers

1
Wellington Management Group
Wellington Management Group
Massachusetts
-$428M
2
Capital International Investors
Capital International Investors
California
-$334M
3
Baillie Gifford & Co
Baillie Gifford & Co
United Kingdom
-$103M
4
BlackRock
BlackRock
New York
-$88M
5
Corient Private Wealth
Corient Private Wealth
Florida
-$63.7M
Name Holding Trade Value Shares
Change 		Shares
Change %
BIAS
401
Beacon Investment Advisory Services
New Jersey
$456K -$549K -2,033 -55%
New York State Teachers Retirement System (NYSTRS)
402
New York State Teachers Retirement System (NYSTRS)
New York
$453K -$1.12M -4,158 -71%
YCM
403
Yousif Capital Management
Michigan
$452K +$8.37K +31 +2%
Osaic Holdings
404
Osaic Holdings
Arizona
$440K -$864K -3,200 -66%
BP
405
Ballentine Partners
Massachusetts
$439K +$14K +52 +3%
KCM
406
Kennedy Capital Management
Missouri
$416K +$1.62K +6 +0.4%
UCFA
407
United Capital Financial Advisors
Texas
$414K +$14K +52 +4%
HNWAG
408
High Net Worth Advisory Group
Florida
$405K – – –
EA
409
Emerald Advisers
Pennsylvania
$404K -$22.7K -84 -5%
XT
410
XTX Topco
Cayman Islands
$402K +$402K +1,488 New
BPC
411
Banque Pictet & Cie
Switzerland
$400K +$400K +1,483 New
DT
412
Diversified Trust
Tennessee
$400K -$270K -999 -40%
SFI
413
Siemens Fonds Invest
Germany
$397K +$28.6K +106 +8%
VIA
414
Virtus Investment Advisers
Connecticut
$396K +$396K +1,467 New
ALAM
415
Asahi Life Asset Management
Japan
$389K -$10.8K -40 -3%
FFM
416
Forum Financial Management
Illinois
$385K -$9.99K -37 -3%
WPC
417
Wedmont Private Capital
Pennsylvania
$379K +$25.4K +107 +7%
YC
418
Yarbrough Capital
Tennessee
$372K – – –
FB
419
Fulton Bank
Pennsylvania
$371K +$8.64K +32 +2%
LWCFA
420
Loring Wolcott & Coolidge Fiduciary Advisors
Massachusetts
$371K – – –
TRCT
421
Tower Research Capital (TRC)
New York
$367K -$1.06M -3,998 -74%
AFGAS
422
Allegiance Financial Group Advisory Services
Virginia
$365K +$104K +384 +40%
OTPPB
423
Ontario Teachers' Pension Plan Board
Ontario, Canada
$363K -$54.5K -202 -13%
I
424
InceptionR
California
$361K +$361K +1,338 New
O
425
Ossiam
France
$361K -$295K -1,091 -45%
15 16
17
18 19