Ionis Pharmaceuticals shares owned by Massachusetts Financial Services
Quarter-by-quarter ownership of Ionis Pharmaceuticals (IONS) shares owned by Massachusetts Financial Services
from 13F filings
Historical chart of Massachusetts Financial Services investment in Ionis Pharmaceuticals
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Quarterly reported holdings in Ionis Pharmaceuticals by Massachusetts Financial Services
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $56M | 863k | 65.42 |
| 2025-06-30 | $21M | 519k | 39.51 |
| 2024-03-31 | $242k | 5.6k | 43.35 |
| 2023-12-31 | $283k | 5.6k | 50.59 |
| 2023-09-30 | $262k | 5.8k | 45.36 |
| 2023-06-30 | $1.1M | 27k | 41.03 |
| 2023-03-31 | $970k | 27k | 35.74 |
| 2016-03-31 | $14M | 335k | 40.50 |
| 2015-12-31 | $21M | 331k | 61.93 |
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