Employee Count History - Prothena Corporation plc
Historical employee count data from SEC filings.
Workforce Trend Analysis
Employee Count History
SEC Filing History
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| Filing Date | Period | Employee Count | Form Type | YoY Change |
|---|---|---|---|---|
| Feb 27, 2026 | Dec 31, 2025 | 100 | 10-K | -38.65% |
| Feb 27, 2025 | Dec 31, 2024 | 163 | 10-K | -5.78% |
| Feb 22, 2024 | Dec 31, 2023 | 173 | 10-K | +36.22% |
| Feb 28, 2023 | Dec 31, 2022 | 127 | 10-K | +54.88% |
| Feb 25, 2022 | Dec 31, 2021 | 82 | 10-K | +24.24% |
| Feb 26, 2021 | Dec 31, 2020 | 66 | 10-K | +29.41% |
Mar 3, 2020 | Dec 31, 2019 | — | — | — |
Mar 15, 2019 | Dec 31, 2018 | — | — | — |
Feb 26, 2018 | Dec 31, 2017 | — | — | — |
Feb 27, 2017 | Dec 31, 2016 | — | — | — |
Feb 25, 2016 | Dec 31, 2015 | — | — | — |
Mar 13, 2015 | Dec 31, 2014 | — | — | — |
Mar 7, 2014 | Dec 31, 2013 | — | — | — |
Mar 29, 2013 | Dec 31, 2012 | — | — | — |