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, Q3 2025
Institutional positions in Atara Biotherapeutics, Inc. as of Sep 30, 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
- 37
- +5 vs. Q2 2025
- Shares held
- 1.88M
- +79.8K (+4.4%) vs. Q2 2025
- Total value
- $27.0M
- +$13.1M (+93.8%) vs. Q2 2025
- New holders
- 9
- 8 more added
- Sold out
- 4
- 7 more reduced
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Atara Biotherapeutics, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 573,183 | $8.21M | 0.39% | 00.0% | Unchanged |
| Redmile Group, LLC | 441,701 | $6.33M | 0.62% | 00.0% | Unchanged |
| Vanguard Group Inc | 203,438 | $2.92M | 0.00% | +12,677+6.6% | Added |
| Marshall Wace, LLP | 115,796 | $1.66M | 0.00% | +73,441+173.4% | Added |
| BlackRock, Inc. | 69,833 | $1.00M | 0.00% | −1,015−1.4% | Reduced |
| Mackenzie Financial Corp | 63,816 | $914.5K | 0.00% | +41,302+183.5% | Added |
| Geode Capital Management, LLC | 60,526 | $867.5K | 0.00% | +390+0.6% | Added |
| Acadian Asset Management LLC | 56,416 | $807.0K | 0.00% | −8,739−13.4% | Reduced |
| Staley Capital Advisers Inc | 50,000 | $716.5K | 0.03% | −25,000−33.3% | Reduced |
| Morgan Stanley | 35,938 | $515.0K | 0.00% | +21,012+140.8% | Added |
| Gsa Capital Partners LLP | 26,213 | $376.0K | 0.03% | +6,622+33.8% | Added |
| State Street Corp | 25,253 | $361.9K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 22,060 | $316.1K | 0.00% | +22,060 | New |
| Renaissance Technologies LLC | 18,936 | $271.4K | 0.00% | +2,000+11.8% | Added |
| UBS Group AG | 17,268 | $247.5K | 0.00% | +8,883+105.9% | Added |
| FMR LLC | 17,156 | $245.8K | 0.00% | 00.0% | Unchanged |
| Cambridge Investment Research Advisors, Inc. | 17,109 | $245.0K | 0.00% | +17,109 | New |
| Quadrature Capital Ltd | 16,542 | $236.9K | 0.00% | +16,542 | New |
| Globeflex Capital L P | 15,458 | $221.5K | 0.03% | +15,458 | New |
| Bridgeway Capital Management, LLC | 14,000 | $200.6K | 0.00% | 00.0% | Unchanged |
| Northern Trust Corp | 11,033 | $158.1K | 0.00% | −137−1.2% | Reduced |
| Bank of America Corp | 5,845 | $83.8K | 0.00% | −1,843−24.0% | Reduced |
| SBI Securities Co., Ltd. | 1,404 | $20.1K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 1,209 | $17.0K | 0.00% | −241−16.6% | Reduced |
| Private Wealth Asset Management, LLC | 900 | $12.9K | 0.00% | +900 | New |
| Jones Financial Companies LLLP | 703 | $9.66K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 342 | $4.90K | 0.00% | +342 | New |
| Wells Fargo & Company | 251 | $3.60K | 0.00% | −700−73.6% | Reduced |
| JPMorgan Chase & Co | 216 | $3.10K | 0.00% | 00.0% | Unchanged |
| Banque Transatlantique SA | 176 | $2.52K | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 175 | $2.51K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 148 | $2.12K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 50 | $716 | 0.00% | 00.0% | Unchanged |
| Kerr Financial Planning Corp | 24 | $322 | 0.00% | +24 | New |
| Alexis Investment Partners, LLC | 15 | $215 | 0.00% | +15 | New |
| Advisor Group Holdings, Inc. | 10 | $138 | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 8 | $115 | 0.00% | +8 | New |
| Vestal Point Capital, LP | 0 | $0 | 0.00% | −94,085−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −23,003−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −4,021−100.0% | Sold out |
| Raiffeisen Bank International AG | 0 | $0 | 0.00% | −200−100.0% | Sold out |