Prothena shares owned by Algert Coldiron Investors
Quarter-by-quarter ownership of Prothena (PRTA) shares owned by Algert Coldiron Investors
from 13F filings
Historical chart of Algert Coldiron Investors investment in Prothena
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Quarterly reported holdings in Prothena by Algert Coldiron Investors
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $4.4M | 446k | 9.76 |
| 2025-06-30 | $292k | 48k | 6.06 |
| 2024-09-30 | $1.2M | 73k | 16.74 |
| 2024-06-30 | $1.6M | 77k | 20.64 |
| 2024-03-31 | $1.2M | 48k | 24.78 |
| 2023-12-31 | $1.8M | 49k | 36.34 |
| 2023-09-30 | $1.4M | 28k | 48.25 |
| 2022-12-31 | $1.2M | 19k | 60.25 |
| 2022-09-30 | $526k | 8.7k | 60.67 |
| 2022-03-31 | $617k | 17k | 36.56 |