Employee Count History - Atara Biotherapeutics, Inc.
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 |
|---|---|---|---|---|
| Mar 16, 2026 | Dec 31, 2025 | 14 | 10-K | -90.85% |
| Mar 7, 2025 | Dec 31, 2024 | 153 | 10-K | -32.00% |
| Mar 28, 2024 | Dec 31, 2023 | 225 | 10-K | -32.63% |
| Feb 8, 2023 | Dec 31, 2022 | 334 | 10-K | -42.21% |
| Feb 28, 2022 | Dec 31, 2021 | 578 | 10-K | +32.27% |
| Mar 1, 2021 | Dec 31, 2020 | 437 | 10-K | +11.20% |
Feb 27, 2020 | Dec 31, 2019 | — | — | — |
Feb 26, 2019 | Dec 31, 2018 | — | — | — |
Feb 27, 2018 | Dec 31, 2017 | — | — | — |
Mar 9, 2017 | Dec 31, 2016 | — | — | — |
Mar 4, 2016 | Dec 31, 2015 | — | — | — |
Feb 26, 2015 | Dec 31, 2014 | — | — | — |