Who Owns Atara Biotherapeutics, Inc. (ATRA)?Hedge Fund & Institutional Holders
Institutional Holders
50
as of Q4 2025
Total Institutional Value
$1.0368000799000014e+91T
% of Float Held
1.3502395536018947e+187%
QoQ Change in Holders
+10 / -2
Price History
ATRA — Biggest New Institutional Buyers This Quarter
| Fund | Action | Shares Added | Value Added |
|---|---|---|---|
| GLOBEFLEX CAPITAL L P | Increased | +62K | +$1.2B |
| SBI Securities Co., Ltd. | New Position | +1K | +$25.0M |
| Private Wealth Asset Management, LLC | New Position | +900 | +$16.0M |
| VANGUARD GROUP INC | Increased | +23K | +$86K |
| FEDERATED HERMES, INC. | New Position | +130 | +$0 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | +2K | +$0 |
| CITADEL ADVISORS LLC | New Position | +16K | +$0 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New Position | +14K | +$0 |
| Connor, Clark & Lunn Investment Management Ltd. | New Position | +10K | +$0 |
| Point72 Asset Management, L.P. | New Position | +18K | +$0 |
| Walleye Capital LLC | New Position | +12K | +$0 |
| DIMENSIONAL FUND ADVISORS LP | New Position | +10K | +$0 |
| JONES FINANCIAL COMPANIES LLLP | New Position | +703 | +$0 |
| BANK OF AMERICA CORP /DE/ | Increased | +5K | +$-83K |
| Cambridge Investment Research Advisors, Inc. | Increased | +6K | +$-245K |
ATRA — Institutions Reducing or Closing Positions
| Fund | Action | Shares Sold | Value Sold |
|---|---|---|---|
| JANE STREET GROUP, LLC | Decreased | -8K | -$316.1M |
| UBS Group AG | Decreased | -16K | -$222.5M |
| ROYAL BANK OF CANADA | Decreased | -359 | -$17.0M |
| GROUP ONE TRADING LLC | Closed Position | -148 | -$2.1M |
| ACADIAN ASSET MANAGEMENT LLC | Decreased | -2K | -$807K |
| MORGAN STANLEY | Decreased | -20K | -$514K |
| GSA CAPITAL PARTNERS LLP | Closed Position | -26K | -$376K |
| BNP PARIBAS FINANCIAL MARKETS | Decreased | -4 | -$0 |
| BlackRock, Inc. | Decreased | -3K | -$-2K |
| MACKENZIE FINANCIAL CORP | Decreased | -5K | -$-85.5M |
Top Institutional Holders(Q4 2025)
ATRA Institutional Ownership History
| Quarter | Holders | Total Value | Change |
|---|---|---|---|
| Q4 2025 | 41 | $21.7B | +8 |
| Q3 2025 | 33 | $19.5B | +6 |
| Q2 2025 | 27 | $10.1B | -10 |
| Q1 2025 | 37 | $10.2B | -4 |
| Q4 2024 | 41 | $22.1B | +10 |
| Q3 2024 | 31 | $16.0B | -11 |
| Q2 2024 | 42 | $17.7B | — |
Similar Stocks by Institutional Ownership
As of Q4 2025, 50 institutional investors hold ATRA (Atara Biotherapeutics, Inc.). The largest holder is EcoR1 Capital, LLC with $10.4B in shares. This quarter, 10 institutions opened new positions and 2 closed their positions.
Frequently Asked Questions
How many hedge funds own ATRA?
As of Q4 2025, 50 institutional investors report holding ATRA (Atara Biotherapeutics, Inc.) in their 13F filings.
Who is the largest institutional holder of ATRA?
The largest institutional holder of ATRA is EcoR1 Capital, LLC with $10.4B in shares.
Is institutional ownership of ATRA increasing or decreasing?
This quarter, 10 institutions opened new positions in ATRA and 2 closed their positions.