Who Owns ATARA BIOTHERAPEUTICS COM NEW (ATRA)? -- Institutional Holders (2026-06-30)
36 institutions reported holding $51.3M of ATARA BIOTHERAPEUTICS COM NEW (ATRA) in SEC 13F filings for 2026-06-30. Largest institutional holders: EcoR1 Capital, LLC ($17.8M), ADAGE CAPITAL PARTNERS GP, L.L.C. ($9.8M), Point72 Asset Management, L.P. ($7.9M), Redmile Group, LLC ($5.1M), VANGUARD GROUP INC ($3.3M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | EcoR1 Capital, LLC | $17.8M | 1.6M | Added |
| 2 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $9.8M | 850,000 | Added |
| 3 | Point72 Asset Management, L.P. | $7.9M | 687,718 | Added |
| 4 | Redmile Group, LLC | $5.1M | 441,701 | Hold |
| 5 | VANGUARD GROUP INC | $3.3M | 291,539 | Added |
| 6 | MACKENZIE FINANCIAL CORP | $2.7M | 233,249 | Trimmed |
| 7 | BlackRock, Inc. | $969,544 | 84,455 | Added |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $862,924 | 75,128 | Added |
| 9 | STALEY CAPITAL ADVISERS INC | $574,000 | 50,000 | Hold |
| 10 | ACADIAN ASSET MANAGEMENT LLC | $444,000 | 38,845 | Trimmed |
| 11 | JANE STREET GROUP, LLC | $348,360 | 30,345 | Trimmed |
| 12 | STATE STREET CORP | $303,680 | 26,453 | Hold |
| 13 | NORTHERN TRUST CORP | $190,465 | 16,591 | Added |
| 14 | FMR LLC | $186,412 | 16,238 | Hold |
| 15 | XTX Topco Ltd | $175,678 | 15,303 | New |
| 16 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $160,720 | 14,000 | Trimmed |
| 17 | MILLENNIUM MANAGEMENT LLC | $145,566 | 12,680 | Trimmed |
| 18 | CITADEL ADVISORS LLC | $116,625 | 10,159 | New |
| 19 | MORGAN STANLEY | $105,368 | 9,178 | Added |
| 20 | Royal Bank of Canada | $55,000 | 4,743 | Added |
| 21 | UBS Group AG | $45,679 | 3,979 | Trimmed |
| 22 | SBI Securities Co., Ltd. | $16,118 | 1,404 | Trimmed |
| 23 | JONES FINANCIAL COMPANIES LLLP | $8,440 | 803 | Added |
| 24 | Caitong International Asset Management Co., Ltd | $3,570 | 311 | New |
| 25 | BARCLAYS PLC | $3,490 | 304 | New |
Source: SEC Form 13F filings · as of 2026-06-30