Prothena shares owned by Acadian Asset Management
Quarter-by-quarter ownership of Prothena (PRTA) shares owned by Acadian Asset Management
from 13F filings
Historical chart of Acadian Asset Management investment in Prothena
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Quarterly reported holdings in Prothena by Acadian Asset Management
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $12M | 1.2M | 9.76 |
| 2025-06-30 | $6.2M | 1.0M | 6.07 |
| 2024-12-31 | $63k | 4.6k | 13.80 |
| 2021-12-31 | $393k | 8.0k | 49.37 |
| 2021-09-30 | $101k | 1.4k | 70.63 |
| 2021-03-31 | $1.7M | 66k | 25.12 |
| 2020-12-31 | $2.1M | 176k | 12.01 |
| 2020-09-30 | $2.1M | 210k | 9.99 |
| 2020-06-30 | $2.4M | 226k | 10.45 |
| 2020-03-31 | $2.2M | 210k | 10.70 |
| 2019-12-31 | $1.8M | 112k | 15.83 |
| 2019-09-30 | $435k | 56k | 7.83 |
| 2019-06-30 | $697k | 66k | 10.56 |
| 2019-03-31 | $633k | 52k | 12.13 |
| 2015-03-31 | $158k | 4.2k | 38.05 |
| 2014-12-31 | $86k | 4.2k | 20.71 |
| 2014-09-30 | $122k | 5.5k | 22.17 |
| 2013-09-30 | $147k | 7.3k | 20.16 |