ATRA
Atara Biotherapeutics, Inc.
$11.65
+0.28 (+2.46%)
At close · Jul 2
Market Cap
$104.97M
Shares
9,010,172
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
The Jun 30, 2026 filing window is
still open — showing the latest known positions. Funds that have not filed yet
carry their prior-quarter positions; a fund that filed without this stock counts
as sold out.
Holders: 34
Total Value: $12,129,896
Total Shares: 2,564,431
Institutional Ownership Trend
9 quarters
Holder Concentration
Across 34 13F filersTop Holder
27.3%
of institutional value
Top 5
72.8%
of institutional value
Top 10
89.4%
of institutional value
HHI
1,396
Broadly held
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Large ADAGE CAPITAL PARTNERS GP, L.L.C. | $3,311,000 | 27.30% | 700,000 | Shares | Sole | 2026-05-15 | ||||
| Mid Redmile Group, LLC | $2,089,245 | 17.22% | 441,701 | Shares | Sole | 2026-05-15 | ||||
| Large MACKENZIE FINANCIAL CORP | $1,483,422 | 12.23% | 313,620 | Shares | Sole | 2026-05-13 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $1,030,487 | 8.50% | 217,862 | Shares | Defined | 2026-05-15 | ||||
| Large Point72 Asset Management, L.P. | $918,868 | 7.58% | 194,264 | Shares | Defined | 2026-05-15 | ||||
| Large ACADIAN ASSET MANAGEMENT LLC | $619,204 | 5.10% | 130,910 | Shares | Defined | 2026-05-13 | ||||
| Mid EcoR1 Capital, LLC | $471,074 | 3.88% | 99,593 | Shares | Sole | 2026-05-15 | ||||
| Mega BlackRock, Inc. | $373,772 | 3.08% | 79,022 | Shares | Sole | 2026-05-13 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $312,869 | 2.58% | 66,146 | Shares | Defined | 2026-05-15 | ||||
| Mega UBS Group AG | $236,830 | 1.95% | 50,070 | Shares | Defined | 2026-05-05 | ||||
| Mid STALEY CAPITAL ADVISERS INC | $236,500 | 1.95% | 50,000 | Shares | Sole | 2026-04-29 | ||||
| Mega MILLENNIUM MANAGEMENT LLC | $225,568 | 1.86% | 47,689 | Shares | Sole | 2026-05-15 | ||||
| Mega JANE STREET GROUP, LLC | $160,204 | 1.32% | 33,870 | Shares | Defined | 2026-05-12 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $159,027 | 1.31% | 33,621 | Shares | Defined | 2026-05-08 | ||||
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | $154,628 | 1.27% | 32,691 | Shares | Sole | 2026-05-15 | ||||
| Mega STATE STREET CORP | $125,122 | 1.03% | 26,453 | Shares | Defined | 2026-05-15 | ||||
| Mega FMR LLC | $76,805 | 0.63% | 16,238 | Shares | Defined | 2026-05-15 | ||||
| Mega NORTHERN TRUST CORP Bank | $58,367 | 0.48% | 12,340 | Shares | Defined | 2026-05-14 | ||||
| Mega MORGAN STANLEY | $43,366 | 0.36% | 9,169 | Shares | Defined | 2026-05-15 | ||||
| Mega ROYAL BANK OF CANADA Bank | $20,428 | 0.17% | 4,319 | Shares | Defined | 2026-05-15 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $7,445 | 0.06% | 1,574 | Shares | Defined | 2026-04-28 | ||||
| Mega Vanguard Global Advisers, LLC | $6,886 | 0.06% | 1,456 | Shares | Defined | 2026-05-08 | ||||
| Large JONES FINANCIAL COMPANIES LLLP | $3,325 | 0.03% | 703 | Shares | Sole | 2026-05-15 | ||||
| Mega WELLS FARGO & COMPANY/MN | $1,187 | 0.01% | 251 | Shares | Defined | 2026-05-11 | ||||
| Mega JPMORGAN CHASE & CO | $1,021 | 0.01% | 216 | Shares | Defined | 2026-05-13 | ||||
| Mid Raiffeisen Bank International AG Bank | $946 | 0.01% | 200 | Call | Sole | 2026-04-24 | ||||
| Mid Banque Transatlantique SA | $832 | 0.01% | 176 | Shares | Defined | 2026-05-13 | ||||
| Mega RHUMBLINE ADVISERS | $827 | 0.01% | 175 | Shares | Sole | 2026-05-12 | ||||
| Micro KERR FINANCIAL PLANNING Corp | $275 | 0.00% | 24 | Shares | Sole | 2026-07-02 | ||||
| Mega BNP PARIBAS ARBITRAGE, SA | $274 | 0.00% | 58 | Shares | Defined | 2026-05-12 | ||||
| Large OSAIC HOLDINGS, INC. | $47 | 0.00% | 10 | Shares | Defined | 2026-05-15 | ||||
| Large Rockefeller Capital Management L.P. | $37 | 0.00% | 8 | Shares | Defined | 2026-05-14 | ||||
| Mid Western Wealth Management, LLC | $4 | 0.00% | 1 | Shares | Sole | 2026-05-19 | ||||
| Mega CITIGROUP INC | $4 | 0.00% | 1 | Shares | Defined | 2026-05-11 | ||||
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