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CITADEL ADVISORS LLC
> ATRA
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | Atara Biotherapeutics, Inc. | ATRA | 1,133,283 | -264,482 | 1,824,585,000 | -2,760,084,000 | $1,610.00 |
| 12/31/2022 | Atara Biotherapeutics, Inc. | ATRA | 1,397,765 | 1,366,179 | 4,584,669,000 | 4,584,550,000 | $3,280.00 |
| 09/30/2022 | Atara Biotherapeutics, Inc. | ATRA | 31,586 | 2,842 | 119,000 | -105,000 | $3.77 |
| 06/30/2022 | Atara Biotherapeutics, Inc. | ATRA | 28,744 | -105,999 | 224,000 | -1,028,000 | $7.79 |
| 03/31/2022 | Atara Biotherapeutics, Inc. | ATRA | 134,743 | 66,007 | 1,252,000 | 169,000 | $9.29 |
| 12/31/2021 | Atara Biotherapeutics, Inc. | ATRA | 68,736 | 36,174 | 1,083,000 | 500,000 | $15.76 |
| 09/30/2021 | Atara Biotherapeutics, Inc. | ATRA | 32,562 | 18,720 | 583,000 | 368,000 | $17.90 |
| 06/30/2021 | Atara Biotherapeutics, Inc. | ATRA | 13,842 | -200,453 | 215,000 | -2,862,000 | $15.53 |
| 03/31/2021 | Atara Biotherapeutics, Inc. | ATRA | 214,295 | -60,297 | 3,077,000 | -2,313,000 | $14.36 |
| 12/31/2020 | Atara Biotherapeutics, Inc. | ATRA | 274,592 | -185,535 | 5,390,000 | -574,000 | $19.63 |
| 09/30/2020 | Atara Biotherapeutics, Inc. | ATRA | 460,127 | 356,762 | 5,964,000 | 4,458,000 | $12.96 |
| 06/30/2020 | Atara Biotherapeutics, Inc. | ATRA | 103,365 | -269,042 | 1,506,000 | -1,663,000 | $14.57 |
| 03/31/2020 | Atara Biotherapeutics, Inc. | ATRA | 372,407 | 116,491 | 3,169,000 | -1,046,000 | $8.51 |
| 12/31/2019 | Atara Biotherapeutics, Inc. | ATRA | 255,916 | -387,431 | 4,215,000 | -4,869,000 | $16.47 |
| 09/30/2019 | Atara Biotherapeutics, Inc. | ATRA | 643,347 | 362,267 | 9,084,000 | 3,431,000 | $14.12 |
| 06/30/2019 | Atara Biotherapeutics, Inc. | ATRA | 281,080 | 265,763 | 5,653,000 | 5,044,000 | $20.11 |
| 03/31/2019 | Atara Biotherapeutics, Inc. | ATRA | 15,317 | 15,317 | 609,000 | 609,000 | $39.76 |
| 09/30/2018 | Atara Biotherapeutics, Inc. | ATRA | 0 | -5,683 | 0 | -209,000 | |
| 06/30/2018 | Atara Biotherapeutics, Inc. | ATRA | 5,683 | -14,792 | 209,000 | -590,000 | $36.78 |
| 03/31/2018 | Atara Biotherapeutics, Inc. | ATRA | 20,475 | 20,475 | 799,000 | 799,000 | $39.02 |
| 09/30/2017 | Atara Biotherapeutics, Inc. | ATRA | 0 | -36,462 | 0 | -510,000 | |
| 06/30/2017 | Atara Biotherapeutics, Inc. | ATRA | 36,462 | -27,108 | 510,000 | -796,000 | $13.99 |
| 03/31/2017 | Atara Biotherapeutics, Inc. | ATRA | 63,570 | 63,570 | 1,306,000 | 1,306,000 | $20.54 |
| 12/31/2015 | Atara Biotherapeutics, Inc. | ATRA | 0 | -8,886 | 0 | -279,000 | |
| 09/30/2015 | Atara Biotherapeutics, Inc. | ATRA | 8,886 | 8,886 | 279,000 | 279,000 | $31.40 |
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