ATRA · Atara Biotherapeutics Inc. Common Stock
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| EcoR1 Capital, LLC 10% Owner | ▲ Buy | Open Market | 1,552,000 Shares held | 5/7/2026 | View profile |
| Adiumentum Capital Fund I LP Director | ▲ Buy | Grant | 1,209,395 Shares held | 5/16/2025 | View profile |
| Panacea Innovation Ltd | ▼ Sell | Open Market | 1,011,000 Shares held | 5/7/2026 | View profile |
| Redmile Group, LLC Director | ▼ Sell | Tax Withholding | 636,852 Shares held | 7/22/2026 | View profile |
| Eric Dobmeier | ▲ Buy | Open Market | 563,325 Shares held | 11/10/2023 | View profile |
| Dupont Jakob EVP, Head of R&D | ▼ Sell | Open Market | 290,794 Shares held | 3/2/2023 | View profile |
| Banard Charlene A. EVP, Chief Technical Officer | ▼ Sell | Open Market | 276,010 Shares held | 5/16/2023 | View profile |
| Koppikar Utpal Director | ▼ Sell | Open Market | 181,978 Shares held | 3/2/2023 | View profile |
| Kristin Yarema Chief Executive Officer | ▲ Buy | Grant | 171,415 Shares held | 3/1/2022 | View profile |
| Joshi Manher EVP, Chief Medical Officer | ▼ Sell | Open Market | 171,284 Shares held | 11/16/2023 | View profile |
| AnhCo Nguyen President and CEO | ▼ Sell | Open Market | 132,775 Shares held | 8/17/2026 | View profile |
| Beth C. Seidenberg Director | ▲ Buy | Grant | 115,689 Shares held | 5/31/2023 | View profile |
| Newell Joe Chief Operations Officer | ▼ Sell | Open Market | 113,097 Shares held | 11/16/2021 | View profile |
| Pascal Touchon President and CEO | ▲ Buy | Grant | 77,955 Shares held | 6/10/2025 | View profile |
| Brian N. Cherry | ▲ Buy | Grant | 62,320 Shares held | 6/11/2026 | View profile |
| Eric J. Hyllengren SVP, CFO | ▼ Sell | Open Market | 56,231 Shares held | 3/3/2025 | View profile |
| Yanina Grant-Huerta Chief Financial Officer | ▼ Sell | Open Market | 49,636 Shares held | 5/18/2026 | View profile |
| Roy D. Baynes | ▲ Buy | Grant | 43,500 Shares held | 6/23/2022 | View profile |
| William K. Heiden | ▲ Buy | Grant | 34,188 Shares held | 6/9/2026 | View profile |
| Carol Giltner Gallagher | ▲ Buy | Grant | 33,012 Shares held | 6/10/2025 | View profile |
| Ronald C. Renaud Jr. CEO & President | ▲ Buy | Grant | 31,500 Shares held | 6/23/2022 | View profile |
| Matthew K. Fust Director | ▲ Buy | Grant | 30,188 Shares held | 6/9/2026 | View profile |
| Murugan Amar SVP, GC & Secretary | ▼ Sell | Open Market | 26,827 Shares held | 8/16/2024 | View profile |
| Jill Henrich EVP, Global Head RA & Quality | ▼ Sell | Open Market | 18,679 Shares held | 3/3/2025 | View profile |
| Maria Grazia Roncarolo | ▲ Buy | Grant | 17,368 Shares held | 6/10/2025 | View profile |
| Ameet Mallik Chief Executive Officer | ▲ Buy | Grant | 16,928 Shares held | 6/10/2025 | View profile |
| Gregory Austin Ciongoli | ▲ Buy | Grant | 12,000 Shares held | 6/9/2026 | View profile |
Transaction History
| AnhCo Nguyen | ▼ Sell | Open Market | 5,062 | $41K | 8/17/2026 |
| Redmile Group, LLC | ▲ Buy | Option Exercise | 195,211 | — | 7/22/2026 |
| Redmile Group, LLC | ▼ Sell | Tax Withholding | 60 | — | 7/22/2026 |
| Brian N. Cherry | ▲ Buy | Grant | 24,000 | $0 | 6/11/2026 |
| William K. Heiden | ▲ Buy | Grant | 12,000 | $0 | 6/9/2026 |
| Matthew K. Fust | ▲ Buy | Grant | 12,000 | $0 | 6/9/2026 |
| Gregory Austin Ciongoli | ▲ Buy | Grant | 12,000 | $0 | 6/9/2026 |
| AnhCo Nguyen | ▼ Sell | Open Market | 5,241 | $48K | 5/18/2026 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 2,414 | $22K | 5/18/2026 |
| Panacea Innovation Ltd | ▼ Sell | Open Market | 313,446 | $3.2M | 5/7/2026 |
| EcoR1 Capital, LLC | ▲ Buy | Open Market | 507,407 | $4.7M | 5/7/2026 |
| Panacea Innovation Ltd | ▲ Buy | Option Exercise | 259,163 | $26 | 3/17/2026 |
| Panacea Innovation Ltd | ▼ Sell | Tax Withholding | 5 | $26 | 3/17/2026 |
| AnhCo Nguyen | ▲ Buy | Grant | 81,100 | $0 | 3/9/2026 |
| Yanina Grant-Huerta | ▲ Buy | Grant | 20,300 | $0 | 3/9/2026 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 24 | $122 | 3/2/2026 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 1,603 | $8K | 3/2/2026 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 377 | $2K | 3/2/2026 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 100 | $508 | 3/2/2026 |
| AnhCo Nguyen | ▼ Sell | Open Market | 198 | $1K | 3/2/2026 |
| AnhCo Nguyen | ▼ Sell | Open Market | 58 | $295 | 3/2/2026 |
| AnhCo Nguyen | ▼ Sell | Open Market | 1,298 | $7K | 3/2/2026 |
| AnhCo Nguyen | ▼ Sell | Open Market | 1,442 | $7K | 3/2/2026 |
| Panacea Innovation Ltd | ▼ Sell | Open Market | 80,554 | $489K | 1/12/2026 |
| Panacea Innovation Ltd | ▲ Buy | Option Exercise | 48,737 | $5 | 11/28/2025 |
| Panacea Innovation Ltd | ▼ Sell | Tax Withholding | 1 | $14 | 11/28/2025 |
| AnhCo Nguyen | ▼ Sell | Open Market | 2,859 | $38K | 11/17/2025 |
| AnhCo Nguyen | ▼ Sell | Open Market | 56 | $739 | 11/17/2025 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 1,645 | $22K | 11/17/2025 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 85 | $1K | 11/17/2025 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 74 | $976 | 11/17/2025 |
| AnhCo Nguyen | ▼ Sell | Open Market | 57 | $662 | 8/18/2025 |
| AnhCo Nguyen | ▼ Sell | Open Market | 1,281 | $15K | 8/18/2025 |
| AnhCo Nguyen | ▼ Sell | Open Market | 1,620 | $19K | 8/18/2025 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 55 | $638 | 8/18/2025 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 86 | $999 | 8/18/2025 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 1,668 | $19K | 8/18/2025 |
| Panacea Innovation Ltd | ▲ Buy | Open Market | 55,000 | $670K | 8/15/2025 |
| Panacea Innovation Ltd | ▲ Buy | Open Market | 19,335 | $186K | 7/17/2025 |
| Carol Giltner Gallagher | ▲ Buy | Grant | 7,828 | $0 | 6/10/2025 |
| Matthew K. Fust | ▲ Buy | Grant | 7,828 | $0 | 6/10/2025 |
| Pascal Touchon | ▲ Buy | Grant | 7,828 | $0 | 6/10/2025 |
| Maria Grazia Roncarolo | ▲ Buy | Grant | 7,828 | $0 | 6/10/2025 |
| Ameet Mallik | ▲ Buy | Grant | 7,828 | $0 | 6/10/2025 |
| William K. Heiden | ▲ Buy | Grant | 7,828 | $0 | 6/10/2025 |
| Yanina Grant-Huerta | ▼ Sell | Open Market | 2,218 | $15K | 5/16/2025 |
| AnhCo Nguyen | ▼ Sell | Open Market | 3,276 | $22K | 5/16/2025 |
| Adiumentum Capital Fund I LP | ▲ Buy | Grant | 75,572 | $500K | 5/16/2025 |
| AnhCo Nguyen | ▼ Sell | Open Market | 3,331 | $23K | 3/3/2025 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 1,211 | $8K | 3/3/2025 |
| Jill Henrich | ▼ Sell | Open Market | 1,059 | $7K | 3/3/2025 |
| Eric J. Hyllengren | ▲ Buy | Grant | 34,050 | $0 | 1/27/2025 |
| Jill Henrich | ▼ Sell | Open Market | 1,000 | $11K | 11/18/2024 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 1,364 | $15K | 11/18/2024 |
| AnhCo Nguyen | ▼ Sell | Open Market | 1,664 | $19K | 11/18/2024 |
| AnhCo Nguyen | ▲ Buy | Grant | 45,000 | $0 | 9/9/2024 |
| Pascal Touchon | ▼ Sell | Open Market | 2,762 | $18K | 8/16/2024 |
| Pascal Touchon | ▼ Sell | Open Market | 276 | $2K | 8/16/2024 |
| AnhCo Nguyen | ▼ Sell | Open Market | 1,468 | $10K | 8/16/2024 |
| AnhCo Nguyen | ▼ Sell | Open Market | 297 | $2K | 8/16/2024 |
| AnhCo Nguyen | ▼ Sell | Open Market | 56 | $371 | 8/16/2024 |
| Murugan Amar | ▼ Sell | Open Market | 877 | $6K | 8/16/2024 |
| Murugan Amar | ▼ Sell | Open Market | 192 | $1K | 8/16/2024 |
| Murugan Amar | ▼ Sell | Open Market | 89 | $590 | 8/16/2024 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 1,041 | $7K | 8/16/2024 |
| Jill Henrich | ▼ Sell | Open Market | 132 | $875 | 8/16/2024 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 29 | $192 | 8/16/2024 |
| Jill Henrich | ▼ Sell | Open Market | 831 | $6K | 8/16/2024 |
| Pascal Touchon | ▼ Sell | Open Market | 81,506 | $50K | 5/16/2024 |
| AnhCo Nguyen | ▼ Sell | Open Market | 42,899 | $26K | 5/16/2024 |
| Murugan Amar | ▼ Sell | Open Market | 32,401 | $20K | 5/16/2024 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 28,648 | $18K | 5/16/2024 |
| Jill Henrich | ▼ Sell | Open Market | 25,750 | $16K | 5/16/2024 |
| Matthew K. Fust | ▲ Buy | Grant | 150,000 | $0 | 3/31/2024 |
| William K. Heiden | ▲ Buy | Grant | 150,000 | $0 | 3/31/2024 |
| Maria Grazia Roncarolo | ▲ Buy | Grant | 150,000 | $0 | 3/31/2024 |
| Carol Giltner Gallagher | ▲ Buy | Grant | 150,000 | $0 | 3/31/2024 |
| Ameet Mallik | ▲ Buy | Grant | 150,000 | $0 | 3/31/2024 |
| Pascal Touchon | ▼ Sell | Open Market | 24,844 | $18K | 3/4/2024 |
| AnhCo Nguyen | ▼ Sell | Open Market | 10,746 | $8K | 3/4/2024 |
| Murugan Amar | ▼ Sell | Open Market | 10,044 | $7K | 3/4/2024 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 1,462 | $1K | 3/4/2024 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 5,217 | $4K | 3/4/2024 |
| Jill Henrich | ▼ Sell | Open Market | 3,879 | $3K | 3/4/2024 |
| AnhCo Nguyen | ▲ Buy | Grant | 675,000 | $0 | 1/8/2024 |
| Murugan Amar | ▲ Buy | Grant | 475,000 | $0 | 1/8/2024 |
| Eric J. Hyllengren | ▲ Buy | Grant | 475,000 | $0 | 1/8/2024 |
| Jill Henrich | ▲ Buy | Grant | 450,000 | $0 | 1/8/2024 |
| Pascal Touchon | ▲ Buy | Grant | 1,280,000 | $0 | 1/8/2024 |
| Pascal Touchon | ▼ Sell | Open Market | 20,409 | $8K | 11/16/2023 |
| AnhCo Nguyen | ▼ Sell | Open Market | 8,856 | $3K | 11/16/2023 |
| Murugan Amar | ▼ Sell | Open Market | 8,307 | $3K | 11/16/2023 |
| Joshi Manher | ▼ Sell | Open Market | 12,287 | $5K | 11/16/2023 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 11,958 | $5K | 11/16/2023 |
| Jill Henrich | ▼ Sell | Open Market | 3,267 | $1K | 11/16/2023 |
| Carol Giltner Gallagher | ▲ Buy | Open Market | 90,980 | $28K | 11/14/2023 |
| Carol Giltner Gallagher | ▲ Buy | Open Market | 179,020 | $40K | 11/13/2023 |
| William K. Heiden | ▲ Buy | Open Market | 100,000 | $25K | 11/10/2023 |
| Eric Dobmeier | ▲ Buy | Open Market | 446,825 | $101K | 11/10/2023 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 6,408 | $11K | 8/16/2023 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 1,778 | $3K | 8/16/2023 |
| Murugan Amar | ▼ Sell | Open Market | 5,050 | $8K | 8/16/2023 |
| Murugan Amar | ▼ Sell | Open Market | 3,622 | $6K | 8/16/2023 |
| Pascal Touchon | ▼ Sell | Open Market | 21,432 | $35K | 8/16/2023 |
| Pascal Touchon | ▼ Sell | Open Market | 9,334 | $15K | 8/16/2023 |
| AnhCo Nguyen | ▼ Sell | Open Market | 5,849 | $10K | 8/16/2023 |
| AnhCo Nguyen | ▼ Sell | Open Market | 9,277 | $15K | 8/16/2023 |
| Joshi Manher | ▼ Sell | Open Market | 3,773 | $6K | 8/16/2023 |
| Jill Henrich | ▼ Sell | Open Market | 2,788 | $5K | 8/16/2023 |
| Jill Henrich | ▼ Sell | Open Market | 558 | $923 | 8/16/2023 |
| Joshi Manher | ▼ Sell | Open Market | 3,202 | $5K | 8/16/2023 |
| Pascal Touchon | ▼ Sell | Open Market | 14,291 | $24K | 6/27/2023 |
| Beth C. Seidenberg | ▲ Buy | Grant | 57,000 | $0 | 5/31/2023 |
| Maria Grazia Roncarolo | ▲ Buy | Grant | 57,000 | $0 | 5/31/2023 |
| Carol Giltner Gallagher | ▲ Buy | Grant | 57,000 | $0 | 5/31/2023 |
| Matthew K. Fust | ▲ Buy | Grant | 57,000 | $0 | 5/31/2023 |
| Ameet Mallik | ▲ Buy | Grant | 57,000 | $0 | 5/31/2023 |
| Eric Dobmeier | ▲ Buy | Grant | 57,000 | $0 | 5/31/2023 |
| William K. Heiden | ▲ Buy | Grant | 57,000 | $0 | 5/31/2023 |
| Murugan Amar | ▼ Sell | Open Market | 7,404 | $15K | 5/16/2023 |
| Murugan Amar | ▼ Sell | Open Market | 985 | $2K | 5/16/2023 |
| Banard Charlene A. | ▼ Sell | Open Market | 19,040 | $39K | 5/16/2023 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 6,199 | $13K | 5/16/2023 |
| Eric J. Hyllengren | ▼ Sell | Open Market | 1,719 | $4K | 5/16/2023 |
| Pascal Touchon | ▼ Sell | Open Market | 29,766 | $61K | 5/16/2023 |
| Pascal Touchon | ▼ Sell | Open Market | 15,679 | $57K | 3/2/2023 |
| Murugan Amar | ▼ Sell | Open Market | 4,221 | $15K | 3/2/2023 |
| Koppikar Utpal | ▼ Sell | Open Market | 6,871 | $25K | 3/2/2023 |
| Dupont Jakob | ▼ Sell | Open Market | 5,074 | $18K | 3/2/2023 |
| Pascal Touchon | ▲ Buy | Grant | 324,711 | $0 | 3/1/2023 |
| Banard Charlene A. | ▲ Buy | Grant | 139,700 | $0 | 3/1/2023 |
| Dupont Jakob | ▲ Buy | Grant | 141,328 | $0 | 3/1/2023 |
| Murugan Amar | ▲ Buy | Grant | 155,375 | $0 | 3/1/2023 |
| Koppikar Utpal | ▼ Sell | Open Market | 2,485 | $14K | 2/7/2023 |
| Dupont Jakob | ▼ Sell | Open Market | 3,218 | $14K | 11/16/2022 |
| Dupont Jakob | ▼ Sell | Open Market | 1,124 | $5K | 11/16/2022 |
| Pascal Touchon | ▼ Sell | Open Market | 15,591 | $70K | 11/16/2022 |
| Murugan Amar | ▼ Sell | Open Market | 3,612 | $16K | 11/16/2022 |
| Koppikar Utpal | ▼ Sell | Open Market | 5,172 | $23K | 11/16/2022 |
| Koppikar Utpal | ▼ Sell | Open Market | 1,083 | $5K | 11/16/2022 |
| Pascal Touchon | ▼ Sell | Open Market | 14,806 | $75K | 8/16/2022 |
| Dupont Jakob | ▼ Sell | Open Market | 4,124 | $21K | 8/16/2022 |
| Murugan Amar | ▼ Sell | Open Market | 1,196 | $6K | 8/16/2022 |
| Murugan Amar | ▼ Sell | Open Market | 2,234 | $11K | 8/16/2022 |
| Koppikar Utpal | ▼ Sell | Open Market | 5,940 | $30K | 8/16/2022 |
| Pascal Touchon | ▼ Sell | Open Market | 14,220 | $102K | 6/27/2022 |
| Carol Giltner Gallagher | ▲ Buy | Grant | 20,500 | $0 | 6/23/2022 |
| William K. Heiden | ▲ Buy | Grant | 20,500 | $0 | 6/23/2022 |
| Matthew K. Fust | ▲ Buy | Grant | 20,500 | $0 | 6/23/2022 |
| Ameet Mallik | ▲ Buy | Grant | 20,500 | $0 | 6/23/2022 |
| Maria Grazia Roncarolo | ▲ Buy | Grant | 20,500 | $0 | 6/23/2022 |
| Roy D. Baynes | ▲ Buy | Grant | 20,500 | $0 | 6/23/2022 |
| Eric Dobmeier | ▲ Buy | Grant | 20,500 | $0 | 6/23/2022 |
| Ronald C. Renaud Jr. | ▲ Buy | Grant | 20,500 | $0 | 6/23/2022 |
| Beth C. Seidenberg | ▲ Buy | Grant | 20,500 | $0 | 6/23/2022 |
| Koppikar Utpal | ▼ Sell | Open Market | 5,853 | $33K | 6/8/2022 |
| Murugan Amar | ▼ Sell | Open Market | 2,317 | $12K | 5/17/2022 |
| Murugan Amar | ▼ Sell | Open Market | 906 | $5K | 5/17/2022 |
| Koppikar Utpal | ▼ Sell | Open Market | 4,616 | $25K | 5/17/2022 |
| Koppikar Utpal | ▼ Sell | Open Market | 966 | $5K | 5/17/2022 |
| Dupont Jakob | ▼ Sell | Open Market | 3,873 | $21K | 5/17/2022 |
| Pascal Touchon | ▼ Sell | Open Market | 13,913 | $74K | 5/17/2022 |
| Koppikar Utpal | ▲ Buy | Grant | 61,235 | $0 | 3/1/2022 |
| Koppikar Utpal | ▼ Sell | Open Market | 2,272 | $22K | 3/1/2022 |
| Koppikar Utpal | ▼ Sell | Open Market | 1,491 | $15K | 3/1/2022 |
| Dupont Jakob | ▲ Buy | Grant | 78,506 | $0 | 3/1/2022 |
| Dupont Jakob | ▼ Sell | Open Market | 2,221 | $22K | 3/1/2022 |
| Pascal Touchon | ▼ Sell | Open Market | 8,828 | $87K | 3/1/2022 |
| Murugan Amar | ▲ Buy | Grant | 51,814 | $0 | 3/1/2022 |
| Murugan Amar | ▼ Sell | Open Market | 1,465 | $14K | 3/1/2022 |
| Murugan Amar | ▼ Sell | Open Market | 1,112 | $11K | 3/1/2022 |
| Kristin Yarema | ▲ Buy | Grant | 45,533 | $0 | 3/1/2022 |
| Pascal Touchon | ▲ Buy | Grant | 180,565 | $0 | 3/1/2022 |
| Dupont Jakob | ▲ Buy | Option Exercise | 5,000 | $48K | 2/10/2022 |
| Dupont Jakob | ▼ Sell | Open Market | 5,000 | $80K | 2/10/2022 |
| Koppikar Utpal | ▼ Sell | Open Market | 2,496 | $36K | 2/7/2022 |
| Dupont Jakob | ▲ Buy | Option Exercise | 5,000 | $48K | 1/3/2022 |
| Dupont Jakob | ▼ Sell | Open Market | 5,000 | $80K | 1/3/2022 |
| Dupont Jakob | ▲ Buy | Option Exercise | 5,000 | $48K | 12/1/2021 |
| Dupont Jakob | ▼ Sell | Open Market | 5,000 | $90K | 12/1/2021 |
| Newell Joe | ▼ Sell | Open Market | 3,332 | $57K | 11/16/2021 |
| Murugan Amar | ▼ Sell | Open Market | 2,124 | $36K | 11/16/2021 |
| Koppikar Utpal | ▼ Sell | Open Market | 3,655 | $63K | 11/16/2021 |
| Dupont Jakob | ▼ Sell | Open Market | 2,199 | $38K | 11/16/2021 |
| Pascal Touchon | ▼ Sell | Open Market | 8,402 | $144K | 11/16/2021 |
| Newell Joe | ▲ Buy | Option Exercise | 3,500 | $43K | 11/15/2021 |
| Newell Joe | ▼ Sell | Open Market | 7,000 | $124K | 11/15/2021 |
| Matthew K. Fust | ▼ Sell | Open Market | 13,354 | $260K | 11/4/2021 |
| Dupont Jakob | ▲ Buy | Option Exercise | 5,000 | $48K | 11/2/2021 |
| Dupont Jakob | ▼ Sell | Open Market | 5,000 | $82K | 11/2/2021 |
| Newell Joe | ▲ Buy | Option Exercise | 10,500 | $128K | 9/22/2021 |
| Newell Joe | ▼ Sell | Open Market | 10,500 | $179K | 9/22/2021 |
| Newell Joe | ▼ Sell | Open Market | 3,116 | $49K | 9/15/2021 |
| Newell Joe | ▼ Sell | Open Market | 3,500 | $53K | 8/30/2021 |