| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 08/16/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 21.4k | $1.65 | $35.4k | | 08/16/2023 |
| 08/16/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 9.3k | $1.65 | $15.4k | | 08/16/2023 |
| 06/27/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 14.3k | $1.66 | $23.7k | | 06/27/2023 |
| 05/16/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 29.8k | $2.04 | $60.6k | | 05/16/2023 |
| 03/02/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 15.7k | $3.63 | $56.9k | | 03/02/2023 |
| 11/16/2022 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 15.6k | $4.49 | $70k | | 11/16/2022 |
| 08/16/2022 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 14.8k | $5.04 | $74.5k | | 08/16/2022 |
| 06/27/2022 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 14.2k | $7.20 | $102.4k | | 06/27/2022 |
| 03/01/2022 | Atara Biotherapeutics, Inc. | ATRA | Grant | Employee Stock Option (Right to Buy) | 339.4k | $10.21 | $3.5M | | 03/01/2022 |
| 03/01/2022 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 8.8k | $9.86 | $87k | | 03/01/2022 |
| 03/01/2022 | Atara Biotherapeutics, Inc. | ATRA | Grant | Common Stock | 180.6k | $0.00 | $0 | | 03/01/2022 |
| 11/16/2021 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 8.4k | $17.12 | $143.8k | | 11/16/2021 |
| 06/25/2021 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 14.2k | $16.32 | $231.7k | | 06/25/2021 |
| 05/18/2021 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 8.3k | $14.55 | $121k | | 05/18/2021 |
| 03/02/2021 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 4.9k | $16.74 | $81.8k | | 03/02/2021 |
| 03/01/2021 | Atara Biotherapeutics, Inc. | ATRA | Grant | Common Stock | 117.2k | $0.00 | $0 | | 03/01/2021 |
| 03/01/2021 | Atara Biotherapeutics, Inc. | ATRA | Grant | Employee Stock Option (Right to Buy) | 176.9k | $17.11 | $3M | | 03/01/2021 |
| 11/17/2020 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 4.7k | $19.77 | $93.3k | | 11/17/2020 |
| 08/18/2020 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 4.8k | $12.09 | $58.1k | | 08/18/2020 |
| 06/25/2020 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 12.1k | $12.92 | $156.8k | | 06/25/2020 |
| 05/18/2020 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 3.2k | $11.22 | $35.8k | | 05/18/2020 |
| 03/01/2020 | Atara Biotherapeutics, Inc. | ATRA | Grant | Common Stock | 150k | $0.00 | $0 | | 03/01/2020 |
| 03/01/2020 | Atara Biotherapeutics, Inc. | ATRA | Grant | Employee Stock Option (Right to Buy) | 242k | $12.15 | $2.9M | | 03/01/2020 |
| 01/24/2020 | Atara Biotherapeutics, Inc. | ATRA | Payment of Exercise | Common Stock | 9.9k | $13.62 | $134.8k | | 01/24/2020 |