Alnylam Pharmaceuticals shares owned by Westfield Capital Management Company
Quarter-by-quarter ownership of Alnylam Pharmaceuticals (ALNY) shares owned by Westfield Capital Management Company
from 13F filings
Historical chart of Westfield Capital Management Company investment in Alnylam Pharmaceuticals
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Quarterly reported holdings in Alnylam Pharmaceuticals by Westfield Capital Management Company
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $40M | 88k | 456.00 |
| 2025-06-30 | $61M | 187k | 326.09 |
| 2025-03-31 | $52M | 192k | 270.02 |
| 2024-12-31 | $51M | 216k | 235.31 |
| 2020-03-31 | $15M | 139k | 108.85 |
| 2019-12-31 | $29M | 249k | 115.17 |
| 2019-09-30 | $23M | 280k | 80.42 |
| 2019-06-30 | $32M | 436k | 72.56 |
| 2019-03-31 | $30M | 320k | 93.45 |
| 2018-12-31 | $20M | 270k | 72.91 |
| 2018-09-30 | $15M | 171k | 87.52 |
| 2018-06-30 | $23M | 228k | 98.49 |
| 2016-09-30 | $18M | 271k | 67.78 |
| 2016-06-30 | $15M | 277k | 55.49 |
More positions owned by Westfield Capital Management Company
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