3 tracked superinvestors hold ALNYLAM PHARMACEUTICALS INC (ALNY), worth $1.5B combined, led by Overdeck / Siegel. Smart money is accumulating ALNY as of the latest 13F filings.
Current price
$312.79
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…
Market cap
$39.5B
P/E
74.59
Div yield
0.0%
Revenue YoY
65.2%
Analyst target
$451
Snapshot for context. For deep analysis use a stock screener — this page is about who owns it.
Superinvestors holding
3
tracked 13F / N-PORT funds
Combined value
$1.5B
disclosed long exposure
Tier-1 conviction
0
concentrated holders
Net this quarter
+2
2 buying · 0 selling
Smart money is net accumulating ALNY: 2 funds added or opened versus 0 trimming.
ALNYLAM PHARMACEUTICALS INC (ALNY) appears mainly in diversified and quant books here (3 funds, $1.5B combined) rather than in concentrated conviction portfolios — read the holders below with that in mind.
The largest position belongs to Overdeck / Siegel at 0.6% of their book — no single tracked manager treats it as an outsized, top-weighted bet.
No tracked fund opened a new position this quarter; 2 added and 0 trimmed, a net add.
| Investor | Move | % of their portfolio | Position value |
|---|---|---|---|
| Added | 0.6% | $659M | |
| Held | 0.6% | $433M | |
| Added | 2% | $386M |
Tier badge = signal quality: 1 concentrated conviction · 2 quant/multi (context) · 3 retail & diversified. Only Tier 1 holdings feed the consensus signal.
Which superinvestors own ALNY?
3 tracked funds hold ALNYLAM PHARMACEUTICALS INC (ALNY), the largest being Overdeck / Siegel (Two Sigma) at 0.6% of its 13F portfolio. 0 of them are concentrated Tier-1 conviction managers.
Is smart money buying or selling ALNY?
In the most recent 13F quarter, 2 tracked funds added or opened ALNY and 0 trimmed it.
How much ALNY do tracked funds hold?
Combined disclosed long exposure to ALNY across tracked superinvestors is $1.5B as of the Mar 2026 filings.
Holdings aggregated from the latest SEC 13F & N-PORT filings via FMP · Mar 2026 quarter. Long equity positions only, reported with up to a 45-day delay — for activity between filings see real-time moves. Not financial advice.