Atara Biotherapeutics, Inc.
ATRA- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001604464
In the last 90 days, Atara Biotherapeutics, Inc. insiders filed 1 open-market purchase and 1 sale; 36 institutions reported holding it in 13F filings for Q2 2026, worth $51.3M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Atara Biotherapeutics, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 41
- +4 vs. Q3 2025
- Shares held
- 2.05M
- +166.5K (+8.8%) vs. Q3 2025
- Total value
- $37.1M
- +$10.1M (+37.4%) vs. Q3 2025
- New holders
- 7
- 12 more added
- Sold out
- 3
- 8 more reduced
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ATRA on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 36 | $51.3M |
| Q1 2026 | 33 | $12.1M |
| Q4 2025 | 41 | $37.1M |
| Q3 2025 | 37 | $27.0M |
| Q2 2025 | 32 | $13.9M |
| Q1 2025 | 37 | $12.4M |
| Q4 2024 | 43 | $31.5M |
| Q3 2024 | 35 | $19.6M |
| Q2 2024 | 48 | $24.1M |
| Q1 2024 | 82 | $57.8M |
| Q4 2023 | 91 | $33.2M |
| Q3 2023 | 109 | $130.5M |
| Q2 2023 | 118 | $145.8M |
| Q1 2023 | 125 | $297.8M |
| Q4 2022 | 139 | $319.3M |
| Q3 2022 | 155 | $376.2M |
| Q2 2022 | 134 | $777.4M |
| Q1 2022 | 145 | $909.5M |
| Q4 2021 | 139 | $1.50B |
| Q3 2021 | 140 | $1.61B |
| Q2 2021 | 145 | $1.34B |
| Q1 2021 | 151 | $1.24B |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Atara Biotherapeutics, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 573,183 | $10.4M | 0.48% | 00.0% | Unchanged |
| Redmile Group, LLC | 441,701 | $7.99M | 0.59% | 00.0% | Unchanged |
| Vanguard Group Inc | 225,940 | $4.09M | 0.00% | +22,502+11.1% | Added |
| Marshall Wace, LLP | 148,632 | $2.69M | 0.00% | +32,836+28.4% | Added |
| Globeflex Capital L P | 77,224 | $1.40M | 0.21% | +61,766+399.6% | Added |
| BlackRock, Inc. | 67,108 | $1.21M | 0.00% | −2,725−3.9% | Reduced |
| Geode Capital Management, LLC | 62,381 | $1.13M | 0.00% | +1,855+3.1% | Added |
| Mackenzie Financial Corp | 58,668 | $1.05M | 0.00% | −5,148−8.1% | Reduced |
| Acadian Asset Management LLC | 54,048 | $976.0K | 0.00% | −2,368−4.2% | Reduced |
| Staley Capital Advisers Inc | 50,000 | $904.5K | 0.04% | 00.0% | Unchanged |
| Bridgeway Capital Management, LLC | 32,691 | $591.4K | 0.01% | +18,691+133.5% | Added |
| Renaissance Technologies LLC | 30,040 | $543.4K | 0.00% | +11,104+58.6% | Added |
| State Street Corp | 26,453 | $478.5K | 0.00% | +1,200+4.8% | Added |
| Cambridge Investment Research Advisors, Inc. | 22,864 | $414.0K | 0.00% | +5,755+33.6% | Added |
| Quadrature Capital Ltd | 20,321 | $367.6K | 0.00% | +3,779+22.8% | Added |
| Point72 Asset Management, L.P. | 18,296 | $331.0K | 0.00% | +18,296 | New |
| FMR LLC | 17,156 | $310.4K | 0.00% | 00.0% | Unchanged |
| Morgan Stanley | 15,991 | $289.3K | 0.00% | −19,947−55.5% | Reduced |
| Citadel Advisors LLC | 15,577 | $281.8K | 0.00% | +15,577 | New |
| Susquehanna International Group, LLP | 14,018 | $253.6K | 0.00% | +14,018 | New |
| Jane Street Group, LLC | 13,990 | $253.1K | 0.00% | −8,070−36.6% | Reduced |
| Northern Trust Corp | 12,340 | $223.2K | 0.00% | +1,307+11.8% | Added |
| Walleye Capital LLC | 12,169 | $220.1K | 0.00% | +12,169 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 10,446 | $189.0K | 0.00% | +10,446 | New |
| Bank of America Corp | 10,387 | $187.9K | 0.00% | +4,542+77.7% | Added |
| Dimensional Fund Advisors LP | 10,028 | $181.4K | 0.00% | +10,028 | New |
| Tower Research Capital LLC (TRC) | 1,737 | $31.4K | 0.00% | +1,395+407.9% | Added |
| SBI Securities Co., Ltd. | 1,404 | $25.4K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 1,397 | $25.3K | 0.00% | −15,871−91.9% | Reduced |
| Private Wealth Asset Management, LLC | 900 | $16.3K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 850 | $15.0K | 0.00% | −359−29.7% | Reduced |
| Jones Financial Companies LLLP | 703 | $12.7K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 251 | $4.54K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 216 | $3.91K | 0.00% | 00.0% | Unchanged |
| Banque Transatlantique SA | 176 | $3.18K | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 175 | $3.17K | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 130 | $2.35K | 0.00% | +130 | New |
| BNP Paribas Arbitrage, SA | 46 | $832 | 0.00% | −4−8.0% | Reduced |
| Advisor Group Holdings, Inc. | 10 | $180 | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 8 | $145 | 0.00% | 00.0% | Unchanged |
| Kerr Financial Planning Corp | 24 | $112 | 0.00% | 00.0% | Unchanged |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −26,213−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −148−100.0% | Sold out |
| Alexis Investment Partners, LLC | 0 | $0 | 0.00% | −15−100.0% | Sold out |