Holding/activity history for Atara Biotherapeutics Inc. (ATRA)
| Period | Shares | % of Portfolio | Activity | % Change to Portfolio | Reported Price |
| 2023 Q4 | 0 | 0 | Sell 100.00% | 0.28 | |
| 2023 Q3 | 390,944 | 0.28 | $37.00 | ||
| 2023 Q2 | 390,944 | 0.28 | Add 7.12% | 0.02 | $40.25 |
| 2023 Q1 | 364,944 | 0.47 | Add 12.31% | 0.05 | $72.50 |
| 2022 Q4 | 324,944 | 0.45 | $82.00 | ||
| 2022 Q3 | 324,944 | 0.55 | $94.50 | ||
| 2022 Q2 | 324,944 | 0.97 | $194.75 | ||
| 2022 Q1 | 324,944 | 0.83 | Reduce 4.17% | 0.04 | $232.25 |
| 2021 Q4 | 339,099 | 1.35 | $394.00 | ||
| 2021 Q3 | 339,099 | 1.43 | $447.50 | ||
| 2021 Q2 | 339,099 | 1.07 | $388.75 | ||
| 2021 Q1 | 339,099 | 0.97 | Reduce 6.93% | 0.07 | $359.00 |
| 2020 Q4 | 364,359 | 1.65 | Reduce 8.19% | 0.15 | $490.75 |
| 2020 Q3 | 396,881 | 1.39 | $324.00 | ||
| 2020 Q2 | 396,881 | 1.81 | Add 19.41% | 0.29 | $364.25 |
| 2020 Q1 | 332,356 | 1.05 | $212.75 | ||
| 2019 Q4 | 332,356 | 1.59 | $411.75 | ||
| 2019 Q3 | 332,356 | 1.38 | Add 18.70% | 0.22 | $353.00 |
| 2019 Q2 | 280,000 | 1.31 | Add 9.71% | 0.12 | $502.75 |
| 2019 Q1 | 255,220 | 2.20 | Add 2.01% | 0.04 | $993.75 |
| 2018 Q4 | 250,185 | 1.95 | $868.50 | ||
| 2018 Q3 | 250,185 | 2.03 | $1,033.75 | ||
| 2018 Q2 | 250,185 | 2.07 | $918.75 | ||
| 2018 Q1 | 250,185 | 2.37 | Add 16.70% | 0.34 | $975.00 |
| 2017 Q4 | 214,385 | 0.96 | $452.50 | ||
| 2017 Q3 | 214,385 | 1.11 | $413.75 | ||
| 2017 Q2 | 214,385 | 0.86 | $350.00 | ||
| 2017 Q1 | 214,385 | 1.31 | $513.75 | ||
| 2016 Q4 | 214,385 | 1.00 | $355.00 | ||
| 2016 Q3 | 214,385 | 1.64 | $534.75 | ||
| 2016 Q2 | 214,385 | 1.65 | $562.75 | ||
| 2016 Q1 | 214,385 | 1.49 | $475.75 | ||
| 2015 Q4 | 214,385 | 2.60 | $660.25 | ||
| 2015 Q3 | 214,385 | 2.84 | Add 11.44% | 0.29 | $786.00 |
| 2015 Q2 | 192,385 | 4.29 | Add 0.97% | 0.04 | $1,319.00 |
| 2015 Q1 | 190,530 | 3.32 | Add 90.84% | 1.58 | $1,011.92 |
| 2014 Q4 | 99,836 | 1.20 | Buy | 1.20 | $592.34 |