ATRA — ATARA BIOTHERAPEUTICS INC
As of Q2 2026, 12 SEC-registered investment managers reported holding ATRA (ATARA BIOTHERAPEUTICS INC) in their latest 13F filings, with a combined reported value of $10.52M across 916.69K shares. That is +92.9% by share count (+441.50K shares) versus the previous quarter, while reported value moved +368.2%. Ownership is concentrated: the five largest holders account for 96.0% of reported value and the top ten for 100.0%.
Compared with the prior quarter, 2 opened new positions, 5 added to existing stakes, 2 trimmed. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
ATRA is classified in the Health Care sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
| Fund | Quarter | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|---|
| Maverick Capital history | Q3 2023 | 6.47M | $9.58M | 0.22% | Hold |
| Point72 Asset Management history | Q2 2026 | 687.72K | $7.90M | 0.01% | Add |
| Vanguard Group history | Q4 2025 | 225.94K | $4.09M | 0.00% | Add |
| PSP Investments history | Q4 2021 | 201.00K | $3.17M | 0.02% | Add |
| Norges Bank Investment Management history | Q4 2022 | 868.66K | $2.85M | 0.00% | New |
| Arrowstreet Capital history | Q3 2022 | 721.61K | $2.73M | 0.00% | Add |
| Marshall Wace history | Q4 2025 | 148.63K | $2.69M | 0.00% | Add |
| BlackRock Inc history | Q2 2026 | 84.45K | $969.54K | 0.00% | Add |
| CPP Investments history | Q1 2022 | 104.00K | $966.00K | 0.00% | Reduce |
| Geode Capital Management history | Q2 2026 | 75.13K | $862.92K | 0.00% | Add |
| Renaissance Technologies history | Q4 2025 | 30.04K | $543.42K | 0.00% | Add |
| D. E. Shaw & Co history | Q4 2023 | 1.03M | $530.23K | 0.00% | Reduce |
| Prudential Financial history | Q2 2024 | 36.34K | $308.89K | 0.00% | New |
| BNY Mellon history | Q1 2024 | 352.51K | $244.64K | 0.00% | Reduce |
| Charles Schwab Investment Management history | Q2 2024 | 26.16K | $222.32K | 0.00% | Reduce |
| Balyasny Asset Management history | Q3 2022 | 58.47K | $221.00K | 0.00% | Add |
| Manulife Financial history | Q1 2024 | 312.16K | $216.64K | 0.00% | Add |
| Northern Trust Corp history | Q2 2026 | 16.59K | $190.47K | 0.00% | Add |
| Bank of America Corp history | Q4 2025 | 10.39K | $187.90K | 0.00% | Add |
| Fidelity Management & Research (FMR) history | Q2 2026 | 16.24K | $186.41K | 0.00% | Hold |
New Positions (Q2 2026)
- Citadel Advisors 10.16K sh · $116.62K
- JPMorgan Chase & Co 216 sh · $2.41K
Fully Exited (vs previous quarter)
No tracked fund fully exited this quarter.
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q3 2021 | Q4 2021 | Q1 2022 | Q2 2022 | Q3 2022 | Q4 2022 | Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Point72 Asset Management | 2.32M | 4.61M | 4.20M | 3.93M | 30.00K | — | 27.26K | 572.23K | 555.00K | — | — | — | — | — | — | — | — | 18.30K | 194.26K | 687.72K |
| BlackRock Inc | — | — | — | — | — | — | — | — | — | — | — | — | 60.95K | 60.85K | 60.80K | 70.85K | 69.83K | 67.11K | 79.02K | 84.45K |
| Geode Capital Management | 1.47M | 1.62M | 1.68M | 1.71M | 1.77M | 1.84M | 1.91M | 2.03M | 2.08M | 2.15M | 2.16M | 42.68K | 46.72K | 54.74K | 58.68K | 60.14K | 60.53K | 62.38K | 66.15K | 75.13K |
| Northern Trust Corp | 843.25K | 860.26K | 831.95K | 868.00K | 855.29K | 880.90K | 876.86K | 795.24K | 798.92K | 845.43K | 850.82K | 31.49K | — | 11.17K | 11.17K | 11.17K | 11.03K | 12.34K | 12.34K | 16.59K |
| Fidelity Management & Research (FMR) | 4.48M | 5.61M | 5.75M | 5.85M | 216.12K | 132.52K | 128.55K | 223.71K | 235.54K | 464.71K | 410.68K | 17.68K | 25.06K | 26.70K | 17.16K | 17.16K | 17.16K | 17.16K | 16.24K | 16.24K |
| Millennium Management | 104.23K | 41.68K | 445.08K | 63.00K | 135.22K | 139.08K | 508.80K | 1.56M | 327.06K | 2.92M | 361.25K | 116.67K | 176.05K | 10.13K | — | — | — | — | 47.69K | 12.68K |
| Citadel Advisors | 64.36K | 114.14K | 156.04K | 44.54K | 44.19K | 2.21M | 3.04M | 1.92M | 2.49M | 272.75K | 6.58M | 261.21K | 260.48K | 267.35K | — | 23.00K | — | 15.58K | — | 10.16K |
| Morgan Stanley | 2.81M | 2.54M | 3.04M | 3.22M | 2.95M | 2.69M | 2.95M | 2.50M | 2.21M | 1.79M | 1.35M | 9.79K | 16.19K | 28.35K | 11.83K | 14.93K | 35.94K | 15.99K | 9.17K | 9.18K |
| UBS Group AG | 135.32K | 245.59K | 249.28K | 40.82K | 85.81K | 355.27K | 334.59K | 51.38K | 58.49K | 3.69M | 106.47K | 403 | 402 | 834 | 24.33K | 8.38K | 17.27K | 1.40K | 50.07K | 3.98K |
| Wells Fargo & Co | 56.53K | 53.17K | 22.71K | 31.50K | 18.54K | 12.75K | 123.64K | 49.53K | 36.24K | 35.37K | 39.99K | 315 | 1.25K | 951 | 951 | 951 | 251 | 251 | 251 | 251 |
| JPMorgan Chase & Co | 8.02M | 7.42M | 8.19M | 8.86M | 8.28M | 7.50M | 7.58M | 7.72M | 8.67M | 2.19M | 1.35M | 1.66K | 1.37K | 216 | 216 | 216 | 216 | 216 | — | 216 |
| Citigroup Inc | 270.85K | 1.01M | 865.14K | 1.03M | 1.29M | 1.03M | 911.22K | 481.75K | 453.10K | 14.01K | 18.69K | 3.17K | 8 | 2 | — | — | — | — | 1 | 97 |
| Renaissance Technologies | 281.68K | — | 569.80K | 225.20K | 336.10K | 165.00K | 1.44M | 2.12M | 829.11K | 622.91K | 980.38K | 46.06K | 67.73K | 67.14K | 17.44K | 16.94K | 18.94K | 30.04K | — | — |
| Bank of America Corp | 61.15K | 123.87K | 186.39K | 346.44K | 483.62K | 376.46K | 1.21M | 81.34K | 98.10K | 189.13K | 6.58M | 186.01K | 203.63K | 205.17K | 187.30K | 7.69K | 5.84K | 10.39K | — | — |
| Marshall Wace | — | — | — | — | 76.61K | — | — | 62.18K | — | 292.50K | 42.24K | — | — | 24.96K | — | 42.35K | 115.80K | 148.63K | — | — |
| Vanguard Group | 6.80M | 7.08M | 6.91M | 7.30M | 6.61M | 7.21M | 6.86M | 6.95M | 6.61M | 6.69M | 5.01M | 169.34K | 180.72K | 178.78K | 190.76K | 190.76K | 203.44K | 225.94K | — | — |
| Goldman Sachs Group | 2.87M | 2.56M | 3.64M | 2.94M | 4.76M | 6.24M | 6.67M | 4.56M | 4.12M | 582.19K | 244.26K | — | — | — | — | — | — | — | — | — |
| Norges Bank Investment Management | — | — | — | — | — | 868.66K | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deutsche Bank AG | 274.40K | 65.83K | 52.92K | 46.45K | 689.86K | 690.48K | 708.24K | 688.19K | 388.38K | 38.38K | 36.35K | — | — | — | — | — | — | — | — | — |
| CPP Investments | 193.00K | 182.00K | 104.00K | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
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