| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 08/16/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 5k | $1.65 | $8.3k | | 08/16/2023 |
| 08/16/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 3.6k | $1.65 | $6k | | 08/16/2023 |
| 05/16/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 985 | $2.04 | $2k | | 05/16/2023 |
| 05/16/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 7.4k | $2.04 | $15.1k | | 05/16/2023 |
| 03/02/2023 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 4.2k | $3.63 | $15.3k | | 03/02/2023 |
| 11/16/2022 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 3.6k | $4.49 | $16.2k | | 11/16/2022 |
| 08/16/2022 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 1.2k | $5.03 | $6k | | 08/16/2022 |
| 08/16/2022 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 2.2k | $5.04 | $11.2k | | 08/16/2022 |
| 03/01/2022 | Atara Biotherapeutics, Inc. | ATRA | Grant | Employee Stock Option (Right to Buy) | 97.4k | $10.21 | $994.4k | | 03/01/2022 |
| 03/01/2022 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 1.1k | $9.86 | $11k | | 03/01/2022 |
| 03/01/2022 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 1.5k | $9.86 | $14.4k | | 03/01/2022 |
| 03/01/2022 | Atara Biotherapeutics, Inc. | ATRA | Grant | Common Stock | 51.8k | $0.00 | $0 | | 03/01/2022 |
| 11/16/2021 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 2.1k | $17.12 | $36.4k | | 11/16/2021 |
| 05/18/2021 | Atara Biotherapeutics, Inc. | ATRA | Sale | Common Stock | 5.7k | $14.55 | $82.7k | | 05/18/2021 |
| 03/01/2021 | Atara Biotherapeutics, Inc. | ATRA | Grant | Employee Stock Option (Right to Buy) | 63k | $17.11 | $1.1M | | 03/01/2021 |
| 03/01/2021 | Atara Biotherapeutics, Inc. | ATRA | Grant | Common Stock | 41.8k | $0.00 | $0 | | 03/01/2021 |
| 04/20/2020 | Atara Biotherapeutics, Inc. | ATRA | Grant | Common Stock | 55k | $0.00 | $0 | | 04/20/2020 |
| 04/20/2020 | Atara Biotherapeutics, Inc. | ATRA | Grant | Employee Stock Option (Right to Buy) | 110k | $8.20 | $902k | | 04/20/2020 |