Prothena shares owned by California State Teachers Retirement System
Quarter-by-quarter ownership of Prothena (PRTA) shares owned by California State Teachers Retirement System
from 13F filings
Historical chart of California State Teachers Retirement System investment in Prothena
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Quarterly reported holdings in Prothena by California State Teachers Retirement System
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $24k | 2.4k | 9.76 |
| 2025-06-30 | $202k | 33k | 6.07 |
| 2025-03-31 | $411k | 33k | 12.38 |
| 2024-12-31 | $460k | 33k | 13.85 |
| 2024-09-30 | $562k | 34k | 16.73 |
| 2024-06-30 | $718k | 35k | 20.64 |
| 2024-03-31 | $1.0M | 40k | 24.77 |
| 2023-09-30 | $2.1M | 44k | 48.25 |
| 2023-06-30 | $3.3M | 49k | 68.28 |
| 2023-03-31 | $2.1M | 44k | 48.47 |
| 2022-12-31 | $2.6M | 43k | 60.25 |
| 2022-09-30 | $2.6M | 42k | 60.64 |
| 2022-06-30 | $1.2M | 43k | 27.15 |
| 2022-03-31 | $1.6M | 43k | 36.57 |
| 2021-12-31 | $2.3M | 46k | 49.41 |
| 2021-09-30 | $3.1M | 44k | 71.24 |
| 2021-06-30 | $2.4M | 47k | 51.40 |
| 2021-03-31 | $1.2M | 46k | 25.12 |
| 2020-12-31 | $557k | 46k | 12.01 |
| 2020-09-30 | $463k | 46k | 9.98 |
| 2020-06-30 | $485k | 46k | 10.46 |
| 2020-03-31 | $650k | 61k | 10.71 |
| 2019-12-31 | $992k | 63k | 15.84 |
| 2019-09-30 | $650k | 62k | 10.57 |
| 2019-06-30 | $650k | 62k | 10.57 |
| 2019-03-31 | $746k | 62k | 12.13 |
| 2018-12-31 | $648k | 63k | 10.30 |
| 2018-09-30 | $804k | 62k | 13.08 |
| 2018-06-30 | $897k | 62k | 14.59 |
| 2018-03-31 | $2.2M | 59k | 36.71 |
| 2017-12-31 | $2.3M | 61k | 37.48 |
| 2017-09-30 | $4.0M | 62k | 64.77 |
| 2017-06-30 | $3.7M | 68k | 54.12 |
| 2017-03-31 | $3.8M | 68k | 55.79 |
| 2016-12-31 | $3.5M | 72k | 49.20 |
| 2016-09-30 | $4.4M | 74k | 59.97 |
| 2016-06-30 | $2.5M | 73k | 34.96 |
| 2016-03-31 | $3.0M | 72k | 41.15 |
| 2015-12-31 | $3.9M | 58k | 68.10 |
| 2015-09-30 | $2.6M | 57k | 45.34 |
| 2015-06-30 | $3.0M | 57k | 52.68 |
| 2015-03-31 | $1.9M | 49k | 38.14 |
| 2014-12-31 | $1.0M | 49k | 20.75 |
| 2014-09-30 | $1.1M | 49k | 22.16 |
| 2014-06-30 | $902k | 40k | 22.55 |
| 2014-03-31 | $988k | 26k | 38.30 |
| 2013-12-31 | $684k | 26k | 26.51 |
| 2013-09-30 | $431k | 21k | 20.24 |
| 2013-06-30 | $267k | 21k | 12.90 |
More positions owned by California State Teachers Retirement System
View all positions for California State Teachers Retirement System