Atara Biotherapeutics, Inc.

Historical 13F Holders

Symbol
ATRA
CUSIP
046513107
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 046513107 since 12/18/2024, newest first.

Filer % of Class Filed
Panacea Innovation Ltd 13D/A Amendment 3
16.1% 5/11/2026
Event 5/7/2026
Panacea Innovation Ltd 13D/A Amendment 2
20.0% 1/14/2026
Event 1/12/2026
Panacea Innovation Ltd 13D/A Amendment 1
20.0% 8/19/2025
Event 8/15/2025
Panacea Innovation Ltd 13D
20.0% 5/21/2025
Event 5/16/2025
Adiumentum Capital Fund I LP 13D/A Amendment 2
20.0% 5/16/2025
Event 5/14/2025

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q2 1 28.0 $321.00
2026 Q1 1 28.0 $132.00
2025 Q3 1 15.0 $215.00
2024 Q4 2 63.0 $839.00
2024 Q3 1 35.0 $285.00
2024 Q2 5 182 k $1.51 M
2024 Q1 88 87.3 M $60.7 M
2023 Q4 97 69.3 M $35.5 M
2023 Q3 119 88.2 M $131 M
2023 Q2 127 90.5 M $146 M
2023 Q1 131 103 M $298 M
2022 Q4 146 105 M $345 M
2022 Q3 161 100 M $378 M
2022 Q2 139 99.8 M $778 M
2022 Q1 153 97.9 M $910 M
2021 Q4 145 95.6 M $1.51 B
2021 Q3 144 89.7 M $1.61 B
2021 Q2 149 86.0 M $1.34 B
2021 Q1 154 86.7 M $1.24 B
2020 Q4 162 87.6 M $1.72 B
2020 Q3 149 83.8 M $1.09 B
2020 Q2 131 77.8 M $1.13 B
2020 Q1 121 63.0 M $536 M
2019 Q4 127 62.0 M $1.02 B
2019 Q3 124 59.0 M $833 M
2019 Q2 134 50.5 M $1.01 B
2019 Q1 131 48.9 M $1.94 B
2018 Q4 128 48.8 M $1.69 B
2018 Q3 127 47.1 M $1.95 B
2018 Q2 143 47.0 M $1.73 B
2018 Q1 131 43.9 M $1.71 B
2017 Q4 91 29.9 M $542 M
2017 Q3 86 26.6 M $441 M
2017 Q2 93 25.7 M $360 M
2017 Q1 91 24.1 M $496 M
2016 Q4 90 23.3 M $331 M
2016 Q3 78 22.4 M $479 M
2016 Q2 76 21.8 M $493 M
2016 Q1 74 19.8 M $377 M
2015 Q4 95 19.3 M $510 M
2015 Q3 95 20.1 M $644 M
2015 Q2 77 13.2 M $696 M
2015 Q1 54 11.2 M $462 M
2014 Q4 42 6.76 M $173 M