ATRA
Atara Biotherapeutics, Inc.Company with tickers: ATRA
CIK
1604464
CUSIP
046513206
Shares Outstanding
9,010,172
13F Activity (30d)
32 filings
32 filers
| Date | Insider | Role | Type | Shares |
|---|---|---|---|---|
| 2026-05-18 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 2,414 |
| 2026-05-18 | Nguyen AnhCo | Director, President and CEO | Sell | 5,241 |
| 2026-05-07 | EcoR1 Capital, LLC | Director, 10% Owner | Buy | 507,407 |
| 2026-05-07 | Panacea Innovation Ltd | 10% Owner | Other | 307,894 |
| 2026-05-07 | Panacea Innovation Ltd | 10% Owner | Sell | 313,446 |
| 2026-05-07 | EcoR1 Capital, LLC | Director, 10% Owner | Other | 1,044,593 |
| 2026-03-17 | Panacea Innovation Ltd | 10% Owner | Convert | 259,163 |
| 2026-03-17 | Panacea Innovation Ltd | 10% Owner | Other | 1,324,446 |
| 2026-03-17 | Panacea Innovation Ltd | 10% Owner | Tax | 5 |
| 2026-03-17 | Panacea Innovation Ltd | 10% Owner | Convert | 259,163 |
| 2026-03-09 | Grant-Huerta Yanina | Chief Accounting Officer | Award | 20,300 |
| 2026-03-09 | Nguyen AnhCo | Director, President and CEO | Award | 81,100 |
| 2026-03-02 | Nguyen AnhCo | Director, President and CEO | Sell | 1,298 |
| 2026-03-02 | Nguyen AnhCo | Director, President and CEO | Sell | 1,442 |
| 2026-03-02 | Nguyen AnhCo | Director, President and CEO | Sell | 198 |
| 2026-03-02 | Nguyen AnhCo | Director, President and CEO | Sell | 58 |
| 2026-03-02 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 1,603 |
| 2026-03-02 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 24 |
| 2026-03-02 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 377 |
| 2026-03-02 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 100 |
| 2026-01-12 | Panacea Innovation Ltd | 10% Owner | Other | 48,736 |
| 2026-01-12 | Panacea Innovation Ltd | 10% Owner | Sell | 80,554 |
| 2025-11-28 | Panacea Innovation Ltd | 10% Owner | Other | 1,405,000 |
| 2025-11-28 | Panacea Innovation Ltd | 10% Owner | Convert | 48,737 |
| 2025-11-28 | Panacea Innovation Ltd | 10% Owner | Convert | 48,737 |
| 2025-11-28 | Panacea Innovation Ltd | 10% Owner | Tax | 1 |
| 2025-11-17 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 85 |
| 2025-11-17 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 74 |
| 2025-11-17 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 1,645 |
| 2025-11-17 | Nguyen AnhCo | Director, President and CEO | Sell | 2,859 |
| 2025-11-17 | Nguyen AnhCo | Director, President and CEO | Sell | 56 |
| 2025-08-18 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 86 |
| 2025-08-18 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 1,668 |
| 2025-08-18 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 55 |
| 2025-08-18 | Nguyen AnhCo | Director, President and CEO | Sell | 1,620 |
| 2025-08-18 | Nguyen AnhCo | Director, President and CEO | Sell | 57 |
| 2025-08-18 | Nguyen AnhCo | Director, President and CEO | Sell | 1,281 |
| 2025-08-15 | Panacea Innovation Ltd | 10% Owner | Buy | 55,000 |
| 2025-07-17 | Panacea Innovation Ltd | 10% Owner | Buy | 19,335 |
| 2025-06-10 | Gallagher Carol Giltner | Director | Award | 7,828 |
| 2025-06-10 | Fust Matthew K | Director | Award | 7,828 |
| 2025-06-10 | Touchon Pascal | Director | Award | 7,828 |
| 2025-06-10 | Roncarolo Maria Grazia | Director | Award | 7,828 |
| 2025-06-10 | MALLIK AMEET | Director, Chief Executive Officer | Award | 7,828 |
| 2025-06-10 | HEIDEN WILLIAM K | Director | Award | 7,828 |
| 2025-05-16 | Nguyen AnhCo | Director, President and CEO | Sell | 3,276 |
| 2025-05-16 | Grant-Huerta Yanina | Chief Accounting Officer | Sell | 2,218 |
| 2025-05-16 | Adiumentum Capital Fund I LP | Director, 10% Owner | Award | 75,572 |
| 2025-05-16 | Adiumentum Capital Fund I LP | Director, 10% Owner | Award | 227,000 |
| 2025-05-16 | Subramanian Nachiappan | Director | Other | 0 |
| 2025-05-16 | Redmile Group, LLC | 10% Owner | Other | 0 |
| 2025-05-16 | Redmile Group, LLC | 10% Owner | Other | 441,701 |
| 2025-05-16 | Redmile Group, LLC | 10% Owner | Other | 0 |
| 2025-05-16 | Redmile Group, LLC | 10% Owner | Other | 0 |
| 2025-05-16 | Panacea Innovation Ltd | 10% Owner | Other | 0 |
| 2025-05-16 | Panacea Innovation Ltd | 10% Owner | Other | 1,330,665 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 1,900 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 262 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 460 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 331 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 496 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 8,961 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 381 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 543 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 350 |
| 2025-03-31 | Hyllengren Eric J | Chief Financial Officer | Other | 154 |
| 2025-03-31 | Grant-Huerta Yanina | Chief Accounting Officer | Other | 0 |
| 2025-03-31 | Grant-Huerta Yanina | Chief Accounting Officer | Other | 0 |
| 2025-03-31 | Grant-Huerta Yanina | Chief Accounting Officer | Other | 0 |
| 2025-03-31 | Grant-Huerta Yanina | Chief Accounting Officer | Other | 39,285 |
| 2025-03-31 | Grant-Huerta Yanina | Chief Accounting Officer | Other | 0 |
| 2025-03-03 | Henrich Jill | EVP, Chief Regulatory Officer | Sell | 1,059 |
| 2025-03-03 | Nguyen AnhCo | Director, President and CEO | Sell | 3,331 |
| 2025-03-03 | Hyllengren Eric J | Chief Financial Officer | Sell | 1,211 |
| 2025-01-27 | Hyllengren Eric J | Chief Financial Officer | Award | 34,050 |
| 2024-11-18 | Henrich Jill | EVP, Chief Regulatory Officer | Sell | 1,000 |
| 2024-11-18 | Nguyen AnhCo | Director, President and CEO | Sell | 1,664 |
| 2024-11-18 | Hyllengren Eric J | Chief Financial Officer | Sell | 1,364 |
| 2024-09-09 | Nguyen AnhCo | Director, President and CEO | Award | 45,000 |
| 2024-09-03 | Adiumentum Capital Fund I LP | Director, 10% Owner | Other | 0 |
| 2024-09-03 | Adiumentum Capital Fund I LP | Director, 10% Owner | Other | 1,133,823 |
| 2024-08-16 | Touchon Pascal | Director | Sell | 276 |
| 2024-08-16 | Touchon Pascal | Director | Sell | 2,762 |
| 2024-08-16 | Nguyen AnhCo | Director, President and CEO | Sell | 297 |
| 2024-08-16 | Nguyen AnhCo | Director, President and CEO | Sell | 1,468 |
| 2024-08-16 | Nguyen AnhCo | Director, President and CEO | Sell | 56 |
| 2024-08-16 | Henrich Jill | EVP, Chief Regulatory Officer | Sell | 831 |
| 2024-08-16 | Henrich Jill | EVP, Chief Regulatory Officer | Sell | 132 |
| 2024-08-16 | Murugan Amar | EVP, Chief Legal Officer | Sell | 89 |
| 2024-08-16 | Murugan Amar | EVP, Chief Legal Officer | Sell | 192 |
| 2024-08-16 | Murugan Amar | EVP, Chief Legal Officer | Sell | 877 |
| 2024-08-16 | Hyllengren Eric J | Chief Financial Officer | Sell | 1,041 |
| 2024-08-16 | Hyllengren Eric J | Chief Financial Officer | Sell | 29 |
| 2024-08-12 | Touchon Pascal | Director | Other | 9,680 |
| 2024-08-12 | Touchon Pascal | Director | Other | 9,000 |
| 2024-08-12 | Touchon Pascal | Director | Other | 7,075 |
| 2024-05-16 | Nguyen AnhCo | Director, President and CEO | Sell | 42,899 |
| 2024-05-16 | Murugan Amar | EVP, Chief Legal Officer | Sell | 32,401 |
| 2024-05-16 | Touchon Pascal | Director | Sell | 81,506 |
| 2024-05-16 | Hyllengren Eric J | Chief Financial Officer | Sell | 28,648 |