3 tracked superinvestors hold ALNYLAM PHARMACEUTICALS INC (ALNY), worth $1.3B combined, led by Overdeck / Siegel. Smart money is trimming ALNY as of the latest 13F filings.
Current price
$266.11
-41.3%
1Y
Alnylam Pharmaceuticals, Inc. is a biopharmaceutical company primarily dedicated to the discovery, development, and commercialization of innovative therapeutic solutions leveraging ribonucleic acid interference (RNAi) technology. Its robust pipeline of RNAi-based treatments addresses a range of critical therapeutic areas, including inherited genetic disorders, cardio-metabolic conditions, hepatic…
Market cap
$39.5B
P/E
74.59
Div yield
0.0%
Revenue YoY
65.2%
Analyst target
$345
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
$1.3B
disclosed long exposure
Tier-1 conviction
0
concentrated holders
Net this quarter
-1
0 buying · 1 selling
Smart money is net reducing ALNY: 1 funds trimmed versus 0 adding.
ALNYLAM PHARMACEUTICALS INC (ALNY) appears mainly in diversified and quant books here (3 funds, $1.3B combined) rather than in concentrated conviction portfolios — read the holders below with that in mind.
The largest position belongs to Overdeck / Siegel at 0.4% of their book — no single tracked manager treats it as an outsized, top-weighted bet.
No tracked fund opened a new position this quarter; 0 added and 1 trimmed, a net reduction.
| Investor | Move | % of their portfolio | Position value |
|---|---|---|---|
| Trimmed | 0.4% | $565M | |
| Held | 0.4% | $404M | |
| Held | 1.6% | $351M |
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 0.4% 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, 0 tracked funds added or opened ALNY and 1 trimmed it.
How much ALNY do tracked funds hold?
Combined disclosed long exposure to ALNY across tracked superinvestors is $1.3B as of the Jun 2026 filings.
One email when a tracked manager opens, adds to or files to sell a position — from Form 4, 13D and Form 144, not the 45-day-old 13F.
Holdings aggregated from the latest SEC 13F & N-PORT filings via FMP · Jun 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.