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 Shares Held, Excluding Options
Total Filers

13D/G Filers

Each filer's latest filing for 046513107 since 12/18/2024, largest first.

Filer % of Class Filed
Adiumentum Capital Fund I LP 13D/A
20.0% 5/16/2025
Event 5/14/2025
Panacea Innovation Ltd 13D/A
16.1% 5/11/2026
Event 5/7/2026

13F Holders by Quarter

Period Filers Shares, Excl. Options Value, Excl. Options
2026 Q2 1 28.0 $321
2026 Q1 1 28.0 $132
2025 Q3 1 15.0 $215
2024 Q4 2 63.0 $839
2024 Q3 1 35.0 $285
2024 Q2 5 182 k $1.51M
2024 Q1 83 87.3 M $60.7M
2023 Q4 92 69.3 M $35.5M
2023 Q3 111 88.2 M $131M
2023 Q2 119 90.5 M $146M
2023 Q1 126 103 M $298M
2022 Q4 141 105 M $345M
2022 Q3 156 100 M $378M
2022 Q2 136 99.8 M $778M
2022 Q1 148 97.9 M $910M
2021 Q4 140 95.6 M $1.51B
2021 Q3 141 89.7 M $1.61B
2021 Q2 146 86.0 M $1.34B
2021 Q1 152 86.7 M $1.24B
2020 Q4 150 87.6 M $1.72B
2020 Q3 142 83.8 M $1.09B
2020 Q2 125 77.8 M $1.13B
2020 Q1 113 63.0 M $536M
2019 Q4 119 62.0 M $1.02B
2019 Q3 115 59.0 M $833M
2019 Q2 119 50.5 M $1.01B
2019 Q1 125 48.9 M $1.94B
2018 Q4 126 48.8 M $1.69B
2018 Q3 120 47.1 M $1.95B
2018 Q2 128 47.0 M $1.73B
2018 Q1 120 43.9 M $1.71B
2017 Q4 89 29.9 M $542M
2017 Q3 84 26.6 M $441M
2017 Q2 88 25.7 M $360M
2017 Q1 87 24.1 M $496M
2016 Q4 87 23.3 M $331M
2016 Q3 77 22.4 M $479M
2016 Q2 74 21.8 M $493M
2016 Q1 73 19.8 M $377M
2015 Q4 87 19.3 M $510M
2015 Q3 91 20.1 M $644M
2015 Q2 76 13.2 M $696M
2015 Q1 54 11.2 M $462M
2014 Q4 41 6.76 M $173M