THOUSAND OAKS, CA
ATARA BIOTHERAPEUTICS, INC.ATRA— Latest position per institution from SEC 13F filings
15
Institutional holders
5.20M
Total shares held
60.65M
Estimated value
260.12K
Avg. position size
ECOR1 CAPITAL, LLC
CIK 1587114
Shares
1.55M
Value
17.82M
Filed
Jun 30, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 1165408
Shares
850K
Value
9.76M
Filed
Jun 30, 2026
POINT72 ASSET MANAGEMENT, L.P.
CIK 1603466
Shares
687.72K
Value
7.90M
Filed
Jun 30, 2026
REDMILE GROUP, LLC
CIK 1425738
Shares
441.70K
Value
5.07M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
247.05K
Value
2.84M
Filed
Jun 30, 2026
MACKENZIE FINANCIAL CORP
CIK 919859
Shares
233.25K
Value
2.68M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
225.94K
Value
4.09M
Filed
Dec 31, 2025
MARSHALL WACE, LLP
CIK 1318757
Shares
148.63K
Value
2.69M
Filed
Dec 31, 2025
QUBE RESEARCH & TECHNOLOGIES LTD
CIK 1729829
Shares
102.66K
Value
872.64K
Filed
Jun 30, 2024
VESTAL POINT CAPITAL, LP
CIK 1974915
Shares
94.08K
Value
726.34K
Filed
Jun 30, 2025
BLACKROCK, INC.
CIK 2012383
Shares
84.45K
Value
969.54K
Filed
Jun 30, 2026
GLOBEFLEX CAPITAL L P
CIK 921531
Shares
77.22K
Value
1.40M
Filed
Dec 31, 2025
TANG CAPITAL MANAGEMENT LLC
CIK 1232621
Shares
75.20K
Value
446.66K
Filed
Mar 31, 2025
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
75.13K
Value
862.92K
Filed
Jun 30, 2026
WOODLINE PARTNERS LP
CIK 1784547
Shares
70.89K
Value
602.56K
Filed
Jun 30, 2024
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
61.15K
Value
519.73K
Filed
Jun 30, 2024
STALEY CAPITAL ADVISERS INC
CIK 1106565
Shares
50K
Value
574K
Filed
Jun 30, 2026
CENTIVA CAPITAL, LP
CIK 1692507
Shares
43.40K
Value
352.87K
Filed
Sep 30, 2024
VANGUARD FIDUCIARY TRUST CO
CIK 933478
Shares
43.04K
Value
494.05K
Filed
Jun 30, 2026
ACADIAN ASSET MANAGEMENT LLC
CIK 916542
Shares
38.84K
Value
444.00
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | ECOR1 CAPITAL, LLC | 1587114 | 1.55M | 17.82M | Jun 30, 2026 |
| 2 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1165408 | 850K | 9.76M | Jun 30, 2026 |
| 3 | POINT72 ASSET MANAGEMENT, L.P. | 1603466 | 687.72K | 7.90M | Jun 30, 2026 |
| 4 | REDMILE GROUP, LLC | 1425738 | 441.70K | 5.07M | Jun 30, 2026 |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 247.05K | 2.84M | Jun 30, 2026 |
| 6 | MACKENZIE FINANCIAL CORP | 919859 | 233.25K | 2.68M | Jun 30, 2026 |
| 7 | VANGUARD GROUP INC | 102909 | 225.94K | 4.09M | Dec 31, 2025 |
| 8 | MARSHALL WACE, LLP | 1318757 | 148.63K | 2.69M | Dec 31, 2025 |
| 9 | QUBE RESEARCH & TECHNOLOGIES LTD | 1729829 | 102.66K | 872.64K | Jun 30, 2024 |
| 10 | VESTAL POINT CAPITAL, LP | 1974915 | 94.08K | 726.34K | Jun 30, 2025 |
| 11 | BLACKROCK, INC. | 2012383 | 84.45K | 969.54K | Jun 30, 2026 |
| 12 | GLOBEFLEX CAPITAL L P | 921531 | 77.22K | 1.40M | Dec 31, 2025 |
| 13 | TANG CAPITAL MANAGEMENT LLC | 1232621 | 75.20K | 446.66K | Mar 31, 2025 |
| 14 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 75.13K | 862.92K | Jun 30, 2026 |
| 15 | WOODLINE PARTNERS LP | 1784547 | 70.89K | 602.56K | Jun 30, 2024 |
| 16 | BLACKROCK FINANCE, INC. | 1364742 | 61.15K | 519.73K | Jun 30, 2024 |
| 17 | STALEY CAPITAL ADVISERS INC | 1106565 | 50K | 574K | Jun 30, 2026 |
| 18 | CENTIVA CAPITAL, LP | 1692507 | 43.40K | 352.87K | Sep 30, 2024 |
| 19 | VANGUARD FIDUCIARY TRUST CO | 933478 | 43.04K | 494.05K | Jun 30, 2026 |
| 20 | ACADIAN ASSET MANAGEMENT LLC | 916542 | 38.84K | 444.00 | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.