Atara BiotherapeuticsATRA
13F holders, Q1 2025 (March 31)37holders −4
5new positions
9sold out
1famous investor
$5.94avg. 13F price*
At the end of Q1 2025, 37 institutions reported holding Atara Biotherapeutics Inc. (ATRA) in their 13F filings, down 4 from Q4 2024. 5 opened new positions and 9 sold out. The largest holders were EcoR1 Capital, LLC ($3.4M), Redmile Group, LLC ($2.6M) and Vanguard Group Inc. ($1.1M). One famous investor held it Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Atara Biotherapeutics Inc.
- CUSIP
- 046513206
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 5 | $362K |
| Exits | 9 | $4.2M |
All 13F filers, Q4 2024 → Q1 2025: 172,866 shares bought and 454,358 shares sold, net −281,492 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 37 holders
| EcoR1 Capital, LLC | 0.20% | Add +7.7% | 573,183 | $3.4M |
| Redmile Group, LLC | 0.25% | No change | 441,701 | $2.6M |
| Vanguard Group Inc. | 0.00% | Add +6.7% | 190,761 | $1.1M |
| Bank of America Corp. | 0.00% | Reduce -8.7% | 187,297 | $1.1M |
| Acadian Asset Management LLC | 0.00% | Reduce -7.5% | 115,111 | $682K |
| Vestal Point Capital, LP | 0.04% | Reduce -24.7% | 94,085 | $559K |
| Staley Capital Advisers Inc. | 0.02% | Add +60.0% | 80,000 | $475K |
| Tang Capital Management LLC | 0.02% | No change | 75,196 | $447K |
| BlackRock, Inc. | 0.00% | Reduce -0.1% | 60,798 | $361K |
| Geode Capital Management, LLC | 0.00% | Add +7.2% | 58,679 | $349K |
| Susquehanna International Group, LLP | 0.00% | New | 41,014 | $244K |
| State Street Corp. | 0.00% | No change | 25,253 | $150K |
| UBS Group AG | 0.00% | Add +2817.8% | 24,334 | $145K |
| Birchview Capital, LP | 0.11% | No change | 22,000 | $131K |
| Gsa Capital Partners LLP | 0.01% | New | 19,385 | $115K |
| Renaissance Technologies | 0.00% | Reduce -74.0% | 17,436 | $104K |
| FMR LLC | 0.00% | Reduce -35.7% | 17,157 | $102K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 14,000 | $83K |
| Morgan Stanley | 0.00% | Reduce -58.3% | 11,828 | $70K |
| Northern Trust Corp. | 0.00% | No change | 11,170 | $66K |
| SBI Securities Co., Ltd. | 0.00% | Reduce -0.8% | 1,404 | $8K |
| Wells Fargo & Company | 0.00% | No change | 951 | $6K |
| Royal Bank of Canada | 0.00% | Add +924.1% | 850 | $5K |
| Jones Financial Companies LLLP | 0.00% | Add +246.3% | 703 | $5K |
| SVB Wealth LLC | 0.00% | New | 421 | $3K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -48.8% | 368 | $2K |
| Lazard Asset Management LLC | 0.00% | Reduce -17.1% | 368 | $2K |
| JPMorgan Chase & Co. | 0.00% | No change | 216 | $1K |
| Raiffeisen Bank International AG | 0.00% | New | 200 | $1K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +164.3% | 185 | $1K |
| IFP Advisors, Inc | 0.00% | No change | 180 | $1K |
| Banque Transatlantique SA | 0.00% | No change | 176 | $1K |
| Rhumbline Advisers | 0.00% | No change | 175 | $1K |
| Group One Trading LLC | 0.00% | Reduce -62.4% | 148 | $879 |
| BNP Paribas Financial Markets | 0.00% | Reduce -18.0% | 50 | $297 |
| Osaic Holdings, Inc. | 0.00% | Reduce -98.4% | 10 | $59 |
| Barclays PLC | 0.00% | New | 1 | $6 |
"% of holder's portfolio" is ATRA's weight in each manager's 13F, not the share of Atara Biotherapeutics Inc. the manager owns.