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, Q2 2026
Institutional positions in Atara Biotherapeutics, Inc. as of Jun 30, 2026. 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
- 36
- +3 vs. Q1 2026
- Shares held
- 4.47M
- +1.90M (+74.2%) vs. Q1 2026
- Total value
- $51.3M
- +$39.2M (+323.0%) vs. Q1 2026
- New holders
- 4
- 12 more added
- Sold out
- 1
- 8 more reduced
Compare with Q1 2026: 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 | $31.8M |
| Q3 2024 | 35 | $19.6M |
| Q2 2024 | 48 | $24.1M |
| Q1 2024 | 82 | $60.7M |
| Q4 2023 | 91 | $35.2M |
| Q3 2023 | 109 | $130.6M |
| Q2 2023 | 118 | $145.9M |
| Q1 2023 | 125 | $298.3M |
| Q4 2022 | 139 | $319.4M |
| Q3 2022 | 155 | $378.0M |
| Q2 2022 | 134 | $777.5M |
| Q1 2022 | 145 | $909.6M |
| Q4 2021 | 139 | $1.51B |
| Q3 2021 | 140 | $1.61B |
| Q2 2021 | 145 | $1.34B |
| Q1 2021 | 151 | $1.24B |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Atara Biotherapeutics, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 1,552,000 | $17.8M | 0.88% | +1,452,407+1,458.3% | Added |
| Adage Capital Partners GP, L.L.C. | 850,000 | $9.76M | 0.01% | +150,000+21.4% | Added |
| Point72 Asset Management, L.P. | 687,718 | $7.90M | 0.01% | +493,454+254.0% | Added |
| Redmile Group, LLC | 441,701 | $5.07M | 0.34% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 247,047 | $2.84M | 0.00% | +29,185+13.4% | Added |
| Mackenzie Financial Corp | 233,249 | $2.68M | 0.00% | −80,371−25.6% | Reduced |
| BlackRock, Inc. | 84,455 | $969.5K | 0.00% | +5,433+6.9% | Added |
| Geode Capital Management, LLC | 75,128 | $862.9K | 0.00% | +8,982+13.6% | Added |
| Staley Capital Advisers Inc | 50,000 | $574.0K | 0.02% | 00.0% | Unchanged |
| Vanguard Fiduciary Trust Co | 43,036 | $494.1K | 0.00% | +9,415+28.0% | Added |
| Acadian Asset Management LLC | 38,845 | $444.0K | 0.00% | −92,065−70.3% | Reduced |
| Jane Street Group, LLC | 30,345 | $348.4K | 0.00% | −3,525−10.4% | Reduced |
| State Street Corp | 26,453 | $303.7K | 0.00% | 00.0% | Unchanged |
| Northern Trust Corp | 16,591 | $190.5K | 0.00% | +4,251+34.4% | Added |
| FMR LLC | 16,238 | $186.4K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 15,303 | $175.7K | 0.00% | +15,303 | New |
| Bridgeway Capital Management, LLC | 14,000 | $160.7K | 0.00% | −18,691−57.2% | Reduced |
| Millennium Management LLC | 12,680 | $145.6K | 0.00% | −35,009−73.4% | Reduced |
| Citadel Advisors LLC | 10,159 | $116.6K | 0.00% | +10,159 | New |
| Morgan Stanley | 9,178 | $105.4K | 0.00% | +9+0.1% | Added |
| Royal Bank of Canada | 4,743 | $55.0K | 0.00% | +424+9.8% | Added |
| UBS Group AG | 3,979 | $45.7K | 0.00% | −46,091−92.1% | Reduced |
| Vanguard Global Advisers, LLC | 1,456 | $16.7K | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 1,404 | $16.1K | 0.00% | −170−10.8% | Reduced |
| Jones Financial Companies LLLP | 803 | $8.44K | 0.00% | +100+14.2% | Added |
| Caitong International Asset Management Co., Ltd | 311 | $3.57K | 0.00% | +311 | New |
| Barclays PLC | 304 | $3.49K | 0.00% | +304 | New |
| Banque Transatlantique SA | 176 | $3.10K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 251 | $2.88K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 216 | $2.41K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 97 | $1.11K | 0.00% | +96+9,600.0% | Added |
| BNP Paribas Arbitrage, SA | 46 | $528 | 0.00% | −12−20.7% | Reduced |
| PlanVest Financial, Inc | 28 | $321 | 0.00% | 00.0% | Unchanged |
| Kerr Financial Planning Corp | 24 | $276 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 10 | $114 | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 8 | $92 | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 0 | $0 | 0.00% | −175−100.0% | Sold out |