Prothena shares owned by Massachusetts Financial Services
Quarter-by-quarter ownership of Prothena (PRTA) shares owned by Massachusetts Financial Services
from 13F filings
Historical chart of Massachusetts Financial Services investment in Prothena
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All positions including Prothena held by Massachusetts Financial Services consolidated in one spreadsheet with up to 7 years of data
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Quarterly reported holdings in Prothena by Massachusetts Financial Services
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $464k | 48k | 9.76 |
| 2025-06-30 | $269k | 44k | 6.07 |
| 2025-03-31 | $542k | 44k | 12.38 |
| 2024-12-31 | $621k | 45k | 13.85 |
| 2022-03-31 | $496k | 14k | 36.59 |
| 2021-12-31 | $2.1M | 42k | 49.41 |
| 2021-09-30 | $3.0M | 43k | 71.23 |
| 2021-06-30 | $2.2M | 43k | 51.40 |
| 2021-03-31 | $1.8M | 73k | 25.12 |
| 2020-12-31 | $1.3M | 109k | 12.01 |
| 2020-09-30 | $871k | 87k | 9.99 |
More positions owned by Massachusetts Financial Services
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View all positions for Massachusetts Financial Services