Who owns ALNYLAM PHARMACEUTICALS, INC.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ALNY from SEC Form 13F filings across 790 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 790 institutions disclosed 133.4M shares of ALNYLAM PHARMACEUTICALS, INC. worth $42.32B — about 99.8% of shares outstanding; the largest disclosed holder is FMR LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
790
13F holders
$42.32B
value, 2026 filers
99.8%
of shares outstanding (133.4M sh)
101
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ALNY's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 15.0M | $4.52B | 0.2% | 11.2% | +3.1% |
| 2 | Capital World Investors | 11.1M | $3.35B | 0.4% | 8.3% | +3.2% |
| 3 | BlackRock, Inc. | 10.9M | $3.28B | 0.0% | 8.2% | +4.4% |
| 4 | Capital Research Global Investors | 9.8M | $2.94B | 0.4% | 7.3% | +3.0% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 6.5M | $1.97B | 0.1% | 4.9% | +0.7% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 6.0M | $1.82B | 0.0% | 4.5% | +1.4% |
| 7 | T. Rowe Price Investment Management, Inc. | 5.6M | $1.70B | 1.1% | 4.2% | +8.6% |
| 8 | Invesco Ltd. | 3.8M | $1.13B | 0.1% | 2.8% | +190.6% |
| 9 | STATE STREET CORP | 3.6M | $1.07B | 0.0% | 2.7% | +7.0% |
| 10 | JPMORGAN CHASE & CO | 2.7M | $785.3M | 0.0% | 2% | -57.7% |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 2.6M | $791.3M | 0.0% | 2% | -0.9% |
| 12 | BAILLIE GIFFORD & CO | 2.4M | $734.5M | 0.7% | 1.8% | -2.2% |
| 13 | NORGES BANKNEW | 2.3M | $683.9M | 0.1% | 1.7% | new |
| 14 | WELLINGTON MANAGEMENT GROUP LLP | 2.1M | $635.3M | 0.1% | 1.6% | +9.0% |
| 15 | Orbis Allan Gray Ltd | 2.0M | $598.3M | 2.1% | 1.5% | +48.9% |
| 16 | Dodge & Cox | 2.0M | $588.6M | 0.3% | 1.5% | +1.4% |
| 17 | TWO SIGMA INVESTMENTS, LP | 1.9M | $564.7M | 0.4% | 1.4% | -5.9% |
| 18 | AMERICAN CENTURY COMPANIES INC | 1.9M | $558.1M | 0.2% | 1.4% | +2.9% |
| 19 | Clearbridge Investments, LLC | 1.3M | $379.1M | 0.3% | 0.9% | -7.1% |
| 20 | PRICE T ROWE ASSOCIATES INC /MD/ | 1.1M | $345.9M | 0.0% | 0.9% | -19.8% |
| 21 | D. E. Shaw & Co., Inc. | 1.1M | $332.4M | 0.2% | 0.8% | +4.3% |
| 22 | MORGAN STANLEY | 1.0M | $310.7M | 0.0% | 0.8% | +2.9% |
| 23 | BANK OF AMERICA CORP /DE/ | 994,476 | $299.4M | 0.0% | 0.7% | +2.9% |
| 24 | Legal & General Group Plc | 924,561 | $278.3M | 0.1% | 0.7% | -1.1% |
| 25 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 893,795 | $269.1M | 0.2% | 0.7% | +34.9% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.