Prothena shares owned by Rock Springs Capital Management
Quarter-by-quarter ownership of Prothena (PRTA) shares owned by Rock Springs Capital Management
from 13F filings
Historical chart of Rock Springs Capital Management investment in Prothena
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Quarterly reported holdings in Prothena by Rock Springs Capital Management
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $248k | 25k | 9.76 |
| 2025-06-30 | $3.0M | 493k | 6.07 |
| 2025-03-31 | $6.1M | 493k | 12.38 |
| 2024-12-31 | $8.9M | 645k | 13.85 |
| 2024-09-30 | $11M | 625k | 16.73 |
| 2024-06-30 | $13M | 625k | 20.64 |
| 2024-03-31 | $16M | 625k | 24.77 |
| 2023-09-30 | $30M | 614k | 48.25 |
| 2023-06-30 | $51M | 754k | 68.28 |
| 2023-03-31 | $37M | 754k | 48.47 |
| 2022-12-31 | $45M | 754k | 60.25 |
| 2022-09-30 | $41M | 679k | 60.63 |
| 2022-06-30 | $18M | 679k | 27.15 |
| 2022-03-31 | $24M | 664k | 36.57 |
| 2021-12-31 | $32M | 648k | 49.40 |
| 2021-09-30 | $51M | 710k | 71.23 |
| 2021-06-30 | $49M | 950k | 51.41 |
| 2021-03-31 | $29M | 1.2M | 25.12 |
| 2020-12-31 | $14M | 1.1M | 12.01 |
| 2020-09-30 | $10M | 1.0M | 9.99 |
| 2020-06-30 | $10M | 989k | 10.46 |
| 2020-03-31 | $5.4M | 500k | 10.70 |
| 2018-06-30 | $1.2M | 85k | 14.58 |
| 2018-03-31 | $17M | 454k | 36.71 |
| 2017-12-31 | $13M | 335k | 37.49 |
| 2017-09-30 | $20M | 310k | 64.77 |
| 2017-06-30 | $17M | 310k | 54.12 |
| 2017-03-31 | $17M | 310k | 55.79 |
| 2016-12-31 | $15M | 310k | 49.19 |
| 2016-09-30 | $19M | 308k | 59.97 |
| 2016-06-30 | $11M | 308k | 34.96 |
| 2016-03-31 | $13M | 308k | 41.16 |
| 2015-12-31 | $17M | 248k | 68.11 |
| 2015-09-30 | $11M | 248k | 45.34 |
| 2015-06-30 | $13M | 250k | 52.67 |
| 2015-03-31 | $9.1M | 238k | 38.14 |
| 2014-12-31 | $4.2M | 203k | 20.76 |
| 2014-09-30 | $4.5M | 203k | 22.16 |
| 2014-06-30 | $3.4M | 150k | 22.55 |
| 2014-03-31 | $2.5M | 65k | 38.31 |
More positions owned by Rock Springs Capital Management
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