Institutional shares held 117 Million
1.25M calls
1.49M puts
Total value of holdings $52.6B
$564M calls
$667M puts
Market Cap $55.3B
123,028,000 Shares Out.
Institutional ownership 95.24%
# of Institutions 916


Latest Institutional Activity in ALNY

Top Purchases

Q4 2025
Congress Asset Management CO Shares Held: 269K ($121M)
Q4 2025
Sg Americas Securities, LLC Shares Held: 90.9K ($40.8M)
Q4 2025
Nordea Investment Management Ab Shares Held: 12.9K ($5.77M)
Q4 2025
North Crest Asset Manangement, LLC Shares Held: 1.73K ($778K)
Q4 2025
Gamma Investing LLC Shares Held: 893 ($401K)

Top Sells

Q4 2025
Assenagon Asset Management S.A. Shares Held: 25.6K ($11.5M)
Q4 2025
Gilbert & Cook, Inc. Shares Held: 4.02K ($1.8M)
Q4 2025
Wealth Enhancement Advisory Services, LLC Shares Held: 14.1K ($6.33M)
Q4 2025
Park Avenue Securities LLC Shares Held: 2.39K ($1.07M)
Q4 2025
Central Pacific Bank Trust Division Shares Held: 2.41K ($1.08M)

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
422K Shares
From 28 Insiders
Grant, award, or other acquisition 174K shares
Exercise of conversion of derivative security 249K shares
Sell / Disposition
357K Shares
From 12 Insiders
Open market or private sale 307K shares
Payment of exercise price or tax liability 1.12K shares
Bona fide gift 49.7K shares

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