Institutional shares held 114 Million
685K calls
738K puts
Total value of holdings $49.2B
$294M calls
$317M puts
Market Cap $52.9B
123,028,000 Shares Out.
Institutional ownership 93.04%
# of Institutions 741


Latest Institutional Activity in ALNY

Top Purchases

Q2 2025
Norges Bank Shares Held: 2.03M ($874M)
Q2 2025
Citadel Advisors LLC Shares Held: 601K ($258M)
Q2 2025
Holocene Advisors, LP Shares Held: 597K ($257M)
Q2 2025
Clearbridge Investments, LLC Shares Held: 557K ($240M)
Q2 2025
Macquarie Group LTD Shares Held: 600K ($258M)

Top Sells

Q2 2025
Aqr Capital Management LLC Shares Held: 188K ($80.9M)
Q2 2025
Baillie Gifford & CO Shares Held: 3.03M ($1.3B)
Q2 2025
Wellington Management Group LLP Shares Held: 2.08M ($892M)
Q2 2025
Price T Rowe Associates Inc Shares Held: 3.15M ($1.35B)
Q2 2025
Adage Capital Partners Gp, L.L.C. Shares Held: 84.4K ($36.3M)

About ALNY

Alnylam Pharmaceuticals, Inc., a biopharmaceutical company, focuses on discovering, developing, and commercializing novel therapeutics based on ribonucleic acid interference. The company's pipeline of investigational RNAi therapeutics focuses on genetic medicines, cardio-metabolic diseases, hepatic infectious diseases, and central nervous system (CNS)/ocular diseases. Its marketed products include ONPATTRO (patisiran), a lipid complex injection for the treatment of the polyneuropathy of hereditary transthyretin-mediated amyloidosis in adults; GIVLAARI for the treatment of adults with acute hepatic porphyria (AHP); and OXLUMO (lumasiran) for the treatment of primary hyperoxaluria type 1 (PH1). In addition, the company is developing givosiran for the treatment of adolescent patients with AHP; patisiran for the treatment of transthyretin amyloidosis, or ATTR amyloidosis, with cardiomyopathy; cemdisiran to treat complement-mediated diseases; ALN-AAT02 for the treatment of AAT deficiency-associated liver disease; ALN-HBV02 to treat chronic HBV infection; Zilebesiran to treat hypertension; and ALN-HSD to treat NASH. Further, it offers Fitusiran for the treatment of hemophilia and rare bleeding disorders, Inclisiran to treat hypercholesterolemia, lumasiran for the treatment of advanced PH1 and recurrent renal stones, and vutrisiran for the treatment of ATTR amyloidosis, which is in phase 3 clinical trial. Alnylam Pharmaceuticals, Inc. has strategic collaborations with Regeneron Pharmaceuticals, Inc. to discover, develop, and commercialize RNAi therapeutics for a range of diseases by addressing therapeutic targets expressed in the eye and CNS; and Sanofi Genzyme to discover, develop, and commercialize RNAi therapeutics. It also has license and collaboration agreements with Novartis AG; Vir Biotechnology, Inc.; Dicerna Pharmaceuticals, Inc.; Ionis Pharmaceuticals, Inc.; and PeptiDream, Inc. The company was founded in 2002 and is headquartered in Cambridge, Massachusetts.


Insider Transactions at ALNY

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
289K Shares
From 25 Insiders
Grant, award, or other acquisition 125K shares
Exercise of conversion of derivative security 164K shares
Open market or private purchase 36 shares
Sell / Disposition
247K Shares
From 10 Insiders
Open market or private sale 197K shares
Bona fide gift 49.7K shares

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