Who Owns ALNY?
Alnylam Pharmaceuticals, Inc. — Institutional Ownership & 13F Holdings
$307.06
+1.92 (+0.63%)
Market Cap
$41.2B
Shares Outstanding
133,427,910
Institutional Holders
613
Total Inst. Value
$49.0B
% of Float Held
101.3%
QoQ Holder Change
+228
Institutional data as of Q1 2025
New Positions
144
Closed Positions
69
Increased
218
Decreased
188
Institutional Ownership Trend
Top 10 Institutional Holders(Q1 2025)
| # | Fund | Value | Shares |
|---|---|---|---|
| 1 | CANADA PENSION PLAN INVESTMENT BOARD | $16.3B | 60,532 |
| 2 | Capital World Investors | $4.5B | 16,749,623 |
| 3 | FMR LLC | $4.1B | 15,309,860 |
| 4 | VANGUARD GROUP INC | $3.5B | 13,056,605 |
| 5 | BlackRock, Inc. | $2.6B | 9,559,382 |
| 6 | Capital Research Global Investors | $1.9B | 7,154,728 |
| 7 | REGENERON PHARMACEUTICALS, INC. | $1.2B | 4,444,445 |
| 8 | T. Rowe Price Investment Management, Inc. | $1.2B | 4,418,145 |
| 9 | DEERFIELD MANAGEMENT COMPANY, L.P. | $1.1B | 4,060,000 |
| 10 | PRICE T ROWE ASSOCIATES INC /MD/ | $946.5M | 3,505,168 |
Biggest Buyers & Sellers This Quarter
Top Buyers
| Fund | Shares Added | Value |
|---|---|---|
| Capital World Investors | +149K | $4.5B |
| FMR LLC | +1.8M | $4.1B |
| VANGUARD GROUP INC | +323K | $3.5B |
| Capital Research Global Investors | +186K | $1.9B |
| T. Rowe Price Investment Management, Inc. | +34K | $1.2B |
Top Sellers
| Fund | Shares Removed | Value |
|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP | -1.6M | $705.0M |
| BAILLIE GIFFORD & CO | -383K | $988K |
| BlackRock, Inc. | -326K | $2.6B |
| Proficio Capital Partners LLC | -193K | $218K |
| DODGE & COX | -189K | $905.0M |
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Frequently Asked Questions
How many institutional investors hold ALNY?
As of Q1 2025, 613 institutional investors report holding ALNY (Alnylam Pharmaceuticals, Inc.) in their 13F filings.
What percentage of Alnylam Pharmaceuticals, Inc. is owned by institutions?
Institutional investors hold approximately 101.3% of Alnylam Pharmaceuticals, Inc.'s float as reported in SEC 13F filings.
Which hedge fund owns the most ALNY?
The largest institutional holder of ALNY is CANADA PENSION PLAN INVESTMENT BOARD with $16.3B in shares.
Are institutions buying or selling ALNY?
This quarter, 144 institutions opened new positions in ALNY and 69 closed their positions.
What is 13F institutional ownership?
SEC Form 13F is a quarterly report filed by institutional investment managers with over $100M in qualifying assets. It discloses their US equity holdings, providing transparency into what the largest investors are buying and selling.
How often is institutional ownership data updated?
13F filings are due 45 days after each calendar quarter end (May 15, Aug 14, Nov 14, Feb 14). Data is updated on HedgeTrace as new filings are processed.