Alnylam Pharmaceuticals, Inc. (ALNY) ownership: Top institutional holder: VANGUARD GROUP INC ($5.39B). Insider activity: Net Seller (0 buys, 20 sells). 7 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 13553932.00 | $5.39B | 2025-12-31 |
| FMR LLC | 14579166.00 | $4.82B | 2026-03-31 |
| Capital World Investors | 10802348.00 | $3.57B | 2026-03-31 |
| BlackRock, Inc. | 10444908.00 | $3.46B | 2026-03-31 |
| Capital Research Global Investors | 9471181.00 | $3.13B | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 6491280.00 | $2.15B | 2026-03-31 |
| JPMORGAN CHASE & CO | 6323752.00 | $2.00B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 5946706.00 | $1.97B | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-06-01 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.