Atara Biotherapeutics, Inc. (ATRA)
Nasdaq: ATRA · Biological Products, (No Diagnostic Substances) · Thousand Oaks, CA · filing with the SEC since 2014
Who runs Atara Biotherapeutics, Inc.
Officers and directors as they report to the SEC on Forms 3, 4 and 5, named as filedChief executive, as filed
Nguyen Anhco
President and CEO. First filing Jun 2023, latest Aug 26, 2026, 13 filings in all.
Officers reporting now
3
of 10 people with a filing in the last fifteen months
Directors reporting now
7
40 people on the record since 2014
Officerssales are open-market, Sep 30, 2025 to Sep 30, 2026
| Name | Title as filed | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Nguyen Anhco | President and CEO | Jun 2023 | Aug 26, 2026 | 8 · $100,000 |
| Sarney Kevin G | Interim CFO | Jul 2026 | Jul 6, 2026 | none |
| Grant-Huerta Yanina | Chief Accounting Officer | Apr 2025 | May 20, 2026 | 8 · $100,000 |
Directorssales are open-market, Sep 30, 2025 to Sep 30, 2026
| Name | Role | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Cherry Brian N | director | Jun 2026 | Sep 4, 2026 | none |
| Green Jeremy | director | May 2025 | Jul 24, 2026 | none |
| Redmile Group, LLC | director | May 2025 | Jul 24, 2026 | none |
| Ciongoli Gregory Austin | director | Sep 2024 | Jun 11, 2026 | none |
| Fust Matthew K | director | Oct 2014 | Jun 11, 2026 | none |
| Heiden William K | director | Nov 2015 | Jun 11, 2026 | none |
| Huang James | director | May 2025 | May 11, 2026 | 1 · $500,000 |
Owners of more than 10% of a classsales are open-market, Sep 30, 2025 to Sep 30, 2026
| Name | Role | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Ecor1 Capital, LLC | 10% owner | May 2026 | May 11, 2026 | none |
| Panacea Innovation Ltd | 10% owner | May 2025 | May 11, 2026 | 1 · $3.2M |
Earlier names on the record30, newest filing first
Touchon Pascal · officer · last filing Jun 2025Gallagher Carol Giltner · director · last filing Jun 2025Mallik Ameet · director · last filing Jun 2025Roncarolo Maria Grazia · director · last filing Jun 2025Subramanian Nachiappan · director · last filing May 2025Adiumentum Capital Fund I Gp LLC · director · last filing May 2025Adiumentum Capital Fund I LP · director · last filing May 2025Hyllengren Eric J · officer · last filing Apr 2025Henrich Jill · officer · last filing Mar 2025Murugan Amar · officer · last filing Aug 2024Joshi Manher · officer · last filing Nov 2023Dobmeier Eric · director · last filing Nov 2023Seidenberg Beth C · director · last filing Jun 2023Banard Charlene A. · officer · last filing May 2023Koppikar Utpal · officer · last filing Mar 2023Dupont Jakob · officer · last filing Mar 2023Baynes Roy D. · director · last filing Jun 2022Renaud Ronald C Jr · director · last filing Jun 2022Yarema Kristin · officer · last filing Mar 2022Newell Joe · officer · last filing Nov 2021Ciechanover Isaac E. · officer · last filing May 2019Berger Dietmar · officer · last filing May 2019Kim Mina · officer · last filing Apr 2019Porter Derrell · officer · last filing Mar 2019Marcus Joel S · director · last filing Mar 2019Haqq Christopher · officer · last filing Feb 2019Soffer Gad · officer · last filing Sep 2018Clark Mitchall G. · officer · last filing May 2018Mcgrath John · officer · last filing Mar 2018Turner Heather D · officer · last filing Feb 2018
A person is listed as reporting now after a filing in the last fifteen months. The record shows when someone last filed; it does not say why they stopped. Each name links to the filings on sec.gov.