Atara Biotherapeutics, Inc. - ATRA
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| EcoR1 Capital, LLC | History | No change | 1,552,000 | 17,816 | 0.87% | 0.87% | 1 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | History | No change | 850,000 | 9,758 | 0.01% | 0.01% | 2 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Point72 Asset Management, L.P. | History | No change | 687,718 | 7,895 | 0.01% | 0.01% | 3 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Redmile Group, LLC | History | No change | 441,701 | 5,070 | 0.34% | 0.34% | 4 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | History | No change | 247,047 | 2,836 | 0.0% | 0.0% | 5 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| MACKENZIE FINANCIAL CORP | History | Reduced | 176,758 | 1,502 | 0.0% | 0.0% | 6 | -56,491 | -24.22% | Q3 2026 | Nov 02, 2026 |
| BlackRock, Inc. | History | No change | 84,455 | 969 | 0.0% | 0.0% | 7 | 0 | 0.0% | Q2 2026 | Aug 07, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 80,950 | 688 | 0.0% | 0.0% | 8 | +5,822 | 7.75% | Q3 2026 | Nov 06, 2026 |
| VANGUARD FIDUCIARY TRUST CO | History | No change | 43,036 | 494 | 0.0% | 0.0% | 9 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| STALEY CAPITAL ADVISERS INC | History | No change | 50,000 | 425 | 0.02% | 0.02% | 10 | 0 | 0.0% | Q3 2026 | Nov 06, 2026 |
| JANE STREET GROUP, LLC | History | No change | 30,345 | 348 | 0.0% | 0.0% | 11 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| STATE STREET CORP | History | No change | 26,453 | 303 | 0.0% | 0.0% | 12 | 0 | 0.0% | Q2 2026 | Sep 22, 2026 |
| NORTHERN TRUST CORP | History | No change | 16,591 | 190 | 0.0% | 0.0% | 13 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| FMR LLC | History | No change | 16,238 | 186 | 0.0% | 0.0% | 14 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| XTX Topco Ltd | History | No change | 15,303 | 175 | 0.0% | 0.0% | 15 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | History | No change | 14,000 | 160 | 0.0% | 0.0% | 16 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | No change | 12,680 | 145 | 0.0% | 0.0% | 17 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| CITADEL ADVISORS LLC | History | No change | 10,159 | 116 | 0.0% | 0.0% | 18 | 0 | 0.0% | Q2 2026 | Sep 02, 2026 |
| MORGAN STANLEY | History | No change | 9,178 | 105 | 0.0% | 0.0% | 19 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Reduced | 11,538 | 98 | 0.0% | 0.0% | 20 | -27,307 | -70.3% | Q3 2026 | Nov 09, 2026 |
| ROYAL BANK OF CANADA | History | No change | 4,743 | 55 | 0.0% | 0.0% | 21 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| UBS Group AG | History | No change | 3,979 | 45 | 0.0% | 0.0% | 22 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| Vanguard Global Advisers, LLC | History | No change | 1,456 | 16 | 0.0% | 0.0% | 23 | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| SBI Securities Co., Ltd. | History | No change | 1,404 | 11 | 0.0% | 0.0% | 24 | 0 | 0.0% | Q3 2026 | Oct 21, 2026 |
| JONES FINANCIAL COMPANIES LLLP | History | No change | 803 | 8 | 0.0% | 0.0% | 25 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Banque Transatlantique SA | History | No change | 176 | 3 | 0.0% | 0.0% | 26 | 0 | 0.0% | Q2 2026 | Jul 30, 2026 |
| Caitong International Asset Management Co., Ltd | History | Reduced | 266 | 2 | 0.0% | 0.0% | 29 | -45 | -14.47% | Q3 2026 | Oct 29, 2026 |
| JPMORGAN CHASE & CO | History | No change | 216 | 2 | 0.0% | 0.0% | 27 | 0 | 0.0% | Q2 2026 | Aug 12, 2026 |
| WELLS FARGO & COMPANY/MN | History | No change | 251 | 2 | 0.0% | 0.0% | 28 | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| BARCLAYS PLC | History | Reduced | 214 | 1 | 0.0% | 0.0% | 30 | -90 | -29.61% | Q3 2026 | Nov 06, 2026 |
| Raiffeisen Bank International AG | History | No change | 200 | 1 | 0.0% | 0.0% | 31 | 0 | 0.0% | Q3 2026 | Oct 28, 2026 |
| CITIGROUP INC | History | Reduced | 1 | 0 | — | 0.0% | — | -96 | -98.97% | Q3 2026 | Nov 04, 2026 |
| IFP Advisors, Inc | History | New | 1 | 0 | — | — | — | +1 | New | Q3 2026 | Oct 16, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | No change | 46 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| OSAIC HOLDINGS, INC. | History | No change | 10 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 14, 2026 |
| Rockefeller Capital Management L.P. | History | No change | 8 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Aug 13, 2026 |
| KERR FINANCIAL PLANNING Corp | History | No change | 24 | 0 | — | — | — | 0 | 0.0% | Q2 2026 | Jul 02, 2026 |
| PlanVest Financial, Inc | History | No change | 28 | 0 | — | — | — | 0 | 0.0% | Q3 2026 | Nov 09, 2026 |