ATARA BIOTHERAPEUTICS INC (ATRA)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
Institutions report 4,429,137 shares against 10,037,710 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | $17.8M | 1,552,000 | 0.87% | 9q | +1458.3%+$16.7M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $9.8M | 850,000 | 0.01% | 2q | +21.4%+$1.7M |
| Point72 Asset Management, L.P. | $7.9M | 687,718 | 0.01% | 3q | +254.0%+$5.7M |
| Redmile Group, LLC | $5.1M | 441,701 | 0.34% | 9q | HELD |
| VANGUARD CAPITAL MANAGEMENT LLC | $2.8M | 247,047 | 0.00% | 2q | +13.4%+$335.0K |
| MACKENZIE FINANCIAL CORP | $2.7M | 233,249 | 0.00% | 5q | -25.6%-$922.7K |
| BlackRock, Inc. | $969.5K | 84,455 | 0.00% | 8q | +6.9%+$62.4K |
| GEODE CAPITAL MANAGEMENT, LLC | $862.9K | 75,128 | 0.00% | 9q | +13.6%+$103.2K |
| STALEY CAPITAL ADVISERS INC | $574.0K | 50,000 | 0.02% | 9q | HELD |
| VANGUARD FIDUCIARY TRUST CO | $494.1K | 43,036 | 0.00% | 2q | +28.0%+$108.1K |
| JANE STREET GROUP, LLC | $348.4K | 30,345 | 0.00% | 4q | -10.4%-$40.5K |
| STATE STREET CORP | $303.7K | 26,453 | 0.00% | 9q | HELD |
| NORTHERN TRUST CORP | $190.5K | 16,591 | 0.00% | 7q | +34.4%+$48.8K |
| FMR LLC | $186.4K | 16,238 | 0.00% | 9q | HELD |
| XTX Topco Ltd | $175.7K | 15,303 | 0.00% | new | NEW |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $160.7K | 14,000 | 0.00% | 9q | -57.2%-$214.6K |
| MILLENNIUM MANAGEMENT LLC | $145.6K | 12,680 | 0.00% | 2q | -73.4%-$401.9K |
| CITADEL ADVISORS LLC | $116.6K | 10,159 | 0.00% | new | NEW |
| MORGAN STANLEY | $105.4K | 9,178 | 0.00% | 9q | HELD |
| ROYAL BANK OF CANADA | $55.0K | 4,743 | 0.00% | 7q | +9.8%+$4.9K |
| UBS Group AG | $45.7K | 3,979 | 0.00% | 9q | -92.1%-$529.1K |
| Vanguard Global Advisers, LLC | $16.7K | 1,456 | 0.00% | 2q | HELD |
| SBI Securities Co., Ltd. | $16.1K | 1,404 | 0.00% | 7q | -10.8%-$2.0K |
| JONES FINANCIAL COMPANIES LLLP | $8.4K | 803 | 0.00% | 7q | +14.2%+$1.1K |
| Caitong International Asset Management Co., Ltd | $3.6K | 311 | 0.00% | new | NEW |
| BARCLAYS PLC | $3.5K | 304 | 0.00% | new | NEW |
| Banque Transatlantique SA | $3.1K | 176 | 0.00% | 7q | HELD |
| WELLS FARGO & COMPANY/MN | $2.9K | 251 | 0.00% | 9q | -50.0%-$2.9K |
| JPMORGAN CHASE & CO | $2.4K | 216 | 0.00% | 9q | HELD |
| Raiffeisen Bank International AG | $2.3K | options only | 0.00% | 6q | OPTIONS |
| CITIGROUP INC | $1.1K | 97 | 0.00% | 2q | +9600.0%+$1.1K |
| BNP PARIBAS FINANCIAL MARKETS | $528 | 46 | 0.00% | 9q | -20.7% |
| ACADIAN ASSET MANAGEMENT LLC | $444 | 38,845 | 0.00% | 9q | -70.3%-$1.1K |
| PlanVest Financial, Inc | $321 | 28 | 0.00% | 2q | HELD |
| KERR FINANCIAL PLANNING Corp | $276 | 24 | 0.00% | 4q | -50.0% |
| OSAIC HOLDINGS, INC. | $114 | 10 | 0.00% | 8q | HELD |
| Rockefeller Capital Management L.P. | $92 | 8 | 0.00% | 4q | HELD |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G/A | Point72 Asset Management, L.P.with 2 co-filers | 7.6% |
| 2026-07-24 | 13D/A | Redmile Group, LLCwith 3 co-filers | 9.9% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 36 | $50.9M | 4,429,137 | 4 | 11 | 9 | 0.0% |
| Q1 2026 | 34 | $11.5M | 2,433,624 | 4 | 10 | 3 | 0.0% |
| Q4 2025 | 40 | $35.7M | 1,972,791 | 7 | 11 | 8 | 0.0% |
| Q3 2025 | 35 | $25.6M | 1,783,653 | 7 | 8 | 7 | 0.0% |
| Q2 2025 | 30 | $13.3M | 1,720,054 | 4 | 4 | 4 | 0.0% |
| Q1 2025 | 34 | $11.6M | 1,951,930 | 4 | 8 | 11 | 0.0% |
| Q4 2024 | 41 | $30.2M | 2,265,432 | 8 | 10 | 9 | 0.0% |
| Q3 2024 | 32 | $18.6M | 2,286,632 | 3 | 12 | 7 | 0.0% |
| Q2 2024 | 46 | $23.1M | 2,713,000 | 45 | 0 | 1 | 0.4% |
| Q1 2024 | 75 | $54.7M | 78,679,646 | 16 | 20 | 24 | 0.1% |
| Q4 2023 | 80 | $33.5M | 65,258,699 | 15 | 25 | 26 | 0.1% |
| Q3 2023 | 97 | $115.0M | 76,362,582 | 8 | 35 | 36 | 1.6% |
| Q2 2023 | 105 | $126.3M | 76,943,378 | 19 | 28 | 41 | 1.8% |
| Q1 2023 | 100 | $261.2M | 88,405,609 | 8 | 38 | 31 | 1.9% |
| Q4 2022 | 105 | $250.3M | 74,730,632 | 14 | 36 | 35 | 2.1% |
| Q3 2022 | 150 | $378.4M | 99,976,220 | 37 | 58 | 29 | 0.1% |
| Q2 2022 | 136 | $780.3M | 99,817,399 | 21 | 44 | 39 | 0.3% |
| Q1 2022 | 143 | $911.2M | 97,890,747 | 22 | 51 | 43 | 0.2% |
| Q4 2021 | 140 | $1.5B | 95,554,231 | 10 | 50 | 42 | 0.1% |
| Q3 2021 | 140 | $1.6B | 89,721,071 | 15 | 51 | 45 | 0.1% |
| Q2 2021 | 146 | $1.3B | 86,007,185 | 15 | 47 | 53 | 0.1% |
| Q1 2021 | 151 | $1.2B | 86,651,290 | 20 | 60 | 43 | 0.1% |
| Q4 2020 | 150 | $1.7B | 86,703,244 | 26 | 59 | 43 | 0.2% |
| Q3 2020 | 141 | $1.1B | 83,806,678 | 30 | 54 | 35 | 0.2% |
| Q2 2020 | 126 | $1.1B | 77,786,610 | 32 | 60 | 21 | 0.2% |
| Q1 2020 | 112 | $536.6M | 62,962,612 | 22 | 48 | 21 | 0.2% |
| Q4 2019 | 118 | $1.0B | 61,995,564 | 18 | 45 | 29 | 0.3% |
| Q3 2019 | 115 | $837.5M | 59,029,710 | 22 | 60 | 16 | 0.5% |
| Q2 2019 | 118 | $1.0B | 50,454,132 | 24 | 52 | 22 | 0.8% |
| Q1 2019 | 123 | $2.0B | 48,865,406 | 16 | 49 | 40 | 0.5% |
| Q4 2018 | 125 | $1.7B | 48,752,123 | 2 | 3 | 1 | 0.4% |