Prothena shares owned by SG Americas Securities
Quarter-by-quarter ownership of Prothena (PRTA) shares owned by SG Americas Securities
from 13F filings
Historical chart of SG Americas Securities investment in Prothena
Tip: Access up to 7 years of quarterly data
All positions including Prothena held by SG Americas Securities consolidated in one spreadsheet with up to 7 years of data
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Quarterly reported holdings in Prothena by SG Americas Securities
| Quarter filed | Position value | Share count | Share price at filing |
|---|---|---|---|
| 2025-09-30 | $554k | 57k | 9.77 |
| 2025-06-30 | $315k | 52k | 6.06 |
| 2025-03-31 | $898k | 73k | 12.38 |
| 2024-12-31 | $521k | 38k | 13.85 |
| 2024-09-30 | $236k | 14k | 16.75 |
| 2024-06-30 | $1.1M | 55k | 20.63 |
| 2024-03-31 | $414k | 17k | 24.76 |
| 2023-12-31 | $4.9M | 136k | 36.34 |
| 2023-09-30 | $4.5M | 93k | 48.25 |
| 2023-06-30 | $243k | 3.6k | 68.35 |
| 2023-03-31 | $5.3M | 109k | 48.47 |
| 2022-12-31 | $4.7M | 79k | 60.25 |
| 2022-09-30 | $8.2M | 136k | 60.63 |
| 2022-06-30 | $4.2M | 155k | 27.15 |
| 2022-03-31 | $5.2M | 144k | 36.57 |
| 2021-12-31 | $7.6M | 155k | 49.40 |
| 2021-09-30 | $8.3M | 116k | 71.23 |
| 2021-06-30 | $515k | 10k | 51.40 |
| 2021-03-31 | $265k | 11k | 25.14 |
| 2020-12-31 | $161k | 13k | 12.03 |
| 2020-06-30 | $127k | 12k | 10.43 |
| 2020-03-31 | $177k | 17k | 10.71 |
| 2019-12-31 | $145k | 9.1k | 15.87 |
| 2019-03-31 | $114k | 9.4k | 12.17 |
| 2018-06-30 | $102k | 7.0k | 14.55 |
| 2018-03-31 | $221k | 6.0k | 36.72 |
| 2017-12-31 | $176k | 4.7k | 37.39 |
| 2017-09-30 | $450k | 6.9k | 64.82 |
| 2017-06-30 | $220k | 4.1k | 54.13 |
| 2017-03-31 | $195k | 3.5k | 55.78 |
| 2016-12-31 | $356k | 7.2k | 49.14 |
| 2016-09-30 | $535k | 8.9k | 59.92 |
| 2016-06-30 | $111k | 3.2k | 35.08 |
| 2016-03-31 | $334k | 8.1k | 41.12 |
| 2015-12-31 | $360k | 5.3k | 68.18 |
| 2015-09-30 | $345k | 7.6k | 45.31 |
| 2015-06-30 | $1.4M | 26k | 52.67 |
| 2015-03-31 | $759k | 20k | 38.12 |
| 2014-12-31 | $487k | 23k | 20.78 |
| 2014-09-30 | $166k | 7.5k | 22.15 |
| 2014-06-30 | $195k | 8.7k | 22.53 |
| 2014-03-31 | $240k | 6.3k | 38.31 |
| 2013-09-30 | $109k | 5.4k | 20.24 |