Prothena shares owned by Ameriprise Financial
Quarter-by-quarter ownership of Prothena (PRTA) shares owned by Ameriprise Financial
from 13F filings
Historical chart of Ameriprise Financial investment in Prothena
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Quarterly reported holdings in Prothena by Ameriprise Financial
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $1.0M | 106k | 9.76 |
| 2025-06-30 | $920k | 152k | 6.07 |
| 2023-09-30 | $534k | 11k | 48.25 |
| 2023-06-30 | $814k | 12k | 68.28 |
| 2023-03-31 | $582k | 12k | 48.47 |
| 2022-12-31 | $1.5M | 24k | 60.20 |
| 2022-09-30 | $2.1M | 34k | 60.59 |
| 2022-06-30 | $687k | 25k | 27.24 |
| 2022-03-31 | $1.0M | 28k | 36.60 |
| 2021-12-31 | $712k | 14k | 49.35 |
| 2021-09-30 | $650k | 9.1k | 71.21 |
| 2021-03-31 | $447k | 18k | 25.15 |
| 2020-12-31 | $493k | 41k | 12.00 |
| 2020-09-30 | $499k | 50k | 10.01 |
| 2020-06-30 | $490k | 47k | 10.46 |
| 2020-03-31 | $503k | 47k | 10.71 |
| 2019-12-31 | $743k | 47k | 15.83 |
| 2019-09-30 | $306k | 39k | 7.85 |
| 2019-06-30 | $341k | 32k | 10.57 |
| 2019-03-31 | $343k | 28k | 12.12 |
| 2018-12-31 | $181k | 18k | 10.31 |
| 2018-09-30 | $188k | 14 | 13428.57 |
| 2018-03-31 | $328k | 8.9k | 36.74 |
| 2015-12-31 | $2.2M | 33k | 68.12 |
| 2015-09-30 | $1.4M | 31k | 45.33 |
| 2015-06-30 | $2.3M | 44k | 52.68 |
| 2014-09-30 | $1.8k | 54 | 33.33 |
| 2014-06-30 | $0 | 91 | 0.00 |
| 2014-03-31 | $0 | 2.6k | 0.00 |
| 2013-12-31 | $0 | 22 | 0.00 |
| 2013-09-30 | $15k | 762 | 20.00 |