| Lastest Insider Transactions Of Atara Biotherapeutics, Inc. ( ATRA ) |
| Symbol | Company Name | Insider Name | Title | Date | Transation | Share | Price | Amount | File Date |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | President and CEO | 2026-05-18 | Sell | 5,241 | 9.13 | 47,845 | 2026-05-20 17:24:39 |
| ATRA | Atara Biotherapeutics, Inc. | Grant-Huerta Yanina | Chief Accounting Officer | 2026-05-18 | Sell | 2,414 | 9.13 | 22,036 | 2026-05-20 17:24:23 |
| ATRA | Atara Biotherapeutics, Inc. | Panacea Innovation Ltd | 10% Owner | 2026-05-07 | Sell | 313,446 | 10.10 | 3,165,021 | 2026-05-11 18:45:04 |
| ATRA | Atara Biotherapeutics, Inc. | EcoR1 Capital, LLC | 10% Owner | 2026-05-07 | Buy | 507,407 | 9.35 | 4,744,256 | 2026-05-11 17:34:20 |
| ATRA | Atara Biotherapeutics, Inc. | Panacea Innovation Ltd | 10% Owner | 2026-03-17 | Option Exercise | 259,163 | 0.00 | 26 | 2026-03-19 16:30:10 |
| ATRA | Atara Biotherapeutics, Inc. | Grant-Huerta Yanina | Chief Accounting Officer | 2026-03-02 | Sell | 2,104 | 5.08 | 10,691 | 2026-03-04 16:28:21 |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | President and CEO | 2026-03-02 | Sell | 2,996 | 5.09 | 15,237 | 2026-03-04 16:28:09 |
| ATRA | Atara Biotherapeutics, Inc. | Panacea Innovation Ltd | 10% Owner | 2026-01-12 | Sell | 80,554 | 6.07 | 489,019 | 2026-01-14 21:16:25 |
| ATRA | Atara Biotherapeutics, Inc. | Panacea Innovation Ltd | 10% Owner | 2025-11-28 | Option Exercise | 48,737 | 0.00 | 5 | 2025-12-01 17:00:04 |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | President and CEO | 2025-11-17 | Sell | 2,915 | 13.19 | 38,437 | 2025-11-19 16:55:17 |
| ATRA | Atara Biotherapeutics, Inc. | Grant-Huerta Yanina | Chief Accounting Officer | 2025-11-17 | Sell | 1,804 | 13.19 | 23,788 | 2025-11-19 16:55:00 |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | President and CEO | 2025-08-18 | Sell | 2,958 | 11.62 | 34,360 | 2025-08-20 16:11:40 |
| ATRA | Atara Biotherapeutics, Inc. | Grant-Huerta Yanina | Chief Accounting Officer | 2025-08-18 | Sell | 1,809 | 11.61 | 21,009 | 2025-08-20 16:08:26 |
| ATRA | Atara Biotherapeutics, Inc. | Panacea Innovation Ltd | 10% Owner | 2025-08-15 | Buy | 55,000 | 12.19 | 670,423 | 2025-08-19 20:15:04 |
| ATRA | Atara Biotherapeutics, Inc. | Panacea Innovation Ltd | 10% Owner | 2025-07-17 | Buy | 19,335 | 9.64 | 186,372 | 2025-07-21 09:00:05 |
| ATRA | Atara Biotherapeutics, Inc. | Grant-Huerta Yanina | Chief Accounting Officer | 2025-05-16 | Sell | 2,218 | 6.76 | 15,000 | 2025-05-20 16:59:06 |
| ATRA | Atara Biotherapeutics, Inc. | Grant-Huerta Yanina | Chief Accounting Officer | 2025-05-16 | Sell | 2,218 | 6.76 | 15,000 | 2025-05-20 16:59:06 |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | President and CEO | 2025-05-16 | Sell | 3,276 | 6.76 | 22,156 | 2025-05-20 16:58:33 |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | President and CEO | 2025-03-03 | Sell | 3,331 | 7.00 | 23,307 | 2025-03-05 17:17:58 |
| ATRA | Atara Biotherapeutics, Inc. | Hyllengren Eric J | EVP, CFO and COO | 2025-03-03 | Sell | 1,211 | 7.00 | 8,473 | 2025-03-05 17:17:42 |
| ATRA | Atara Biotherapeutics, Inc. | Henrich Jill | EVP, Chief Regulatory Officer | 2025-03-03 | Sell | 1,059 | 7.00 | 7,410 | 2025-03-05 17:16:33 |
| ATRA | Atara Biotherapeutics, Inc. | Henrich Jill | EVP, Chief Regulatory Officer | 2024-11-18 | Sell | 1,000 | 11.20 | 11,198 | 2024-11-20 18:05:49 |
| ATRA | Atara Biotherapeutics, Inc. | Hyllengren Eric J | EVP, CFO and COO | 2024-11-18 | Sell | 1,364 | 11.20 | 15,274 | 2024-11-20 18:04:59 |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | President and CEO | 2024-11-18 | Sell | 1,664 | 11.20 | 18,633 | 2024-11-20 18:04:00 |
| ATRA | Atara Biotherapeutics, Inc. | Touchon Pascal | President and CEO | 2024-05-16 | Sell | 81,506 | 0.62 | 50,289 | 2024-05-20 20:34:45 |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | EVP, Chief Sci. & Tech Officer | 2024-05-16 | Sell | 42,899 | 0.62 | 26,469 | 2024-05-20 20:34:20 |
| ATRA | Atara Biotherapeutics, Inc. | Murugan Amar | EVP, Chief Legal Officer | 2024-05-16 | Sell | 32,401 | 0.62 | 19,991 | 2024-05-20 20:33:56 |
| ATRA | Atara Biotherapeutics, Inc. | Hyllengren Eric J | EVP, CFO | 2024-05-16 | Sell | 28,648 | 0.62 | 17,676 | 2024-05-20 20:33:28 |
| ATRA | Atara Biotherapeutics, Inc. | Henrich Jill | EVP, Global Head RA & Quality | 2024-05-16 | Sell | 25,750 | 0.62 | 15,888 | 2024-05-20 20:32:54 |
| ATRA | Atara Biotherapeutics, Inc. | Touchon Pascal | President and CEO | 2023-11-16 | Sell | 20,409 | 0.39 | 7,939 | 2023-11-20 17:31:30 |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | EVP, Chief Sci. & Tech Officer | 2023-11-16 | Sell | 8,856 | 0.39 | 3,445 | 2023-11-20 17:31:08 |
| ATRA | Atara Biotherapeutics, Inc. | Murugan Amar | EVP, Chief Legal Officer | 2023-11-16 | Sell | 8,307 | 0.39 | 3,231 | 2023-11-20 17:30:36 |
| ATRA | Atara Biotherapeutics, Inc. | Joshi Manher | EVP, Chief Medical Officer | 2023-11-16 | Sell | 12,287 | 0.39 | 4,780 | 2023-11-20 17:30:19 |
| ATRA | Atara Biotherapeutics, Inc. | Hyllengren Eric J | SVP, CFO | 2023-11-16 | Sell | 11,958 | 0.39 | 4,652 | 2023-11-20 17:29:48 |
| ATRA | Atara Biotherapeutics, Inc. | Henrich Jill | EVP, Global Head RA & Quality | 2023-11-16 | Sell | 3,267 | 0.39 | 1,271 | 2023-11-20 17:29:23 |
| ATRA | Atara Biotherapeutics, Inc. | Gallagher Carol Giltner | Directior | 2023-11-13 | Buy | 270,000 | 0.25 | 68,214 | 2023-11-15 17:07:08 |
| ATRA | Atara Biotherapeutics, Inc. | HEIDEN WILLIAM K | Directior | 2023-11-10 | Buy | 100,000 | 0.25 | 25,330 | 2023-11-14 18:29:04 |
| ATRA | Atara Biotherapeutics, Inc. | DOBMEIER ERIC | Directior | 2023-11-10 | Buy | 446,825 | 0.23 | 101,340 | 2023-11-14 18:27:14 |
| ATRA | Atara Biotherapeutics, Inc. | Hyllengren Eric J | SVP, CFO | 2023-08-16 | Sell | 8,186 | 1.65 | 13,527 | 2023-08-18 18:25:27 |
| ATRA | Atara Biotherapeutics, Inc. | Murugan Amar | EVP, Chief Legal Officer | 2023-08-16 | Sell | 8,672 | 1.65 | 14,330 | 2023-08-18 18:25:23 |
| ATRA | Atara Biotherapeutics, Inc. | Touchon Pascal | President and CEO | 2023-08-16 | Sell | 30,766 | 1.65 | 50,835 | 2023-08-18 18:25:18 |
| ATRA | Atara Biotherapeutics, Inc. | Nguyen AnhCo | EVP, Chief Sci. & Tech Officer | 2023-08-16 | Sell | 15,126 | 1.65 | 24,997 | 2023-08-18 18:25:14 |
| ATRA | Atara Biotherapeutics, Inc. | Joshi Manher | EVP, Chief Medical Officer | 2023-08-16 | Sell | 6,975 | 1.65 | 11,526 | 2023-08-18 18:25:09 |
| ATRA | Atara Biotherapeutics, Inc. | Henrich Jill | EVP, Global Head RA & Quality | 2023-08-16 | Sell | 3,346 | 1.65 | 5,532 | 2023-08-18 18:25:04 |
| ATRA | Atara Biotherapeutics, Inc. | Touchon Pascal | President and CEO | 2023-06-27 | Sell | 14,291 | 1.66 | 23,723 | 2023-06-29 16:15:42 |
| ATRA | Atara Biotherapeutics, Inc. | Murugan Amar | EVP, Chief Legal Officer | 2023-05-16 | Sell | 8,389 | 2.04 | 17,089 | 2023-05-18 20:17:23 |
| ATRA | Atara Biotherapeutics, Inc. | Touchon Pascal | President and CEO | 2023-05-16 | Sell | 29,766 | 2.04 | 60,633 | 2023-05-18 20:17:21 |
| ATRA | Atara Biotherapeutics, Inc. | Banard Charlene A. | EVP, Chief Technical Officer | 2023-05-16 | Sell | 19,040 | 2.04 | 38,784 | 2023-05-18 20:17:21 |
| ATRA | Atara Biotherapeutics, Inc. | Hyllengren Eric J | SVP, CFO | 2023-05-16 | Sell | 7,918 | 2.04 | 16,131 | 2023-05-18 20:17:16 |
| ATRA | Atara Biotherapeutics, Inc. | Touchon Pascal | President and CEO | 2023-03-02 | Sell | 15,679 | 3.63 | 56,868 | 2023-03-06 18:49:35 |
| ATRA | Atara Biotherapeutics, Inc. | Murugan Amar | SVP, GC & Secretary | 2023-03-02 | Sell | 4,221 | 3.63 | 15,310 | 2023-03-06 18:48:31 |
| ATRA | Atara Biotherapeutics, Inc. | Koppikar Utpal | Chief Financial Officer | 2023-03-02 | Sell | 6,871 | 3.63 | 24,921 | 2023-03-06 18:47:31 |
| ATRA | Atara Biotherapeutics, Inc. | Dupont Jakob | EVP, Head of R&D | 2023-03-02 | Sell | 5,074 | 3.63 | 18,403 | 2023-03-06 18:46:39 |
| ATRA | Atara Biotherapeutics, Inc. | Koppikar Utpal | Chief Financial Officer | 2023-02-07 | Sell | 2,485 | 5.46 | 13,568 | 2023-02-09 17:00:12 |
