Real time Form 13D and 13G transaction reports:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| Reported DateTime | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | Filing |
| 2024-11-14 6:10 pm Purchase | 13G | ATARA BIOTHERAPEUTICS INC ATRA | EcoR1 Capital LLC | 493,463 9.990% | 493,463 (New Position) | View |
| 2024-11-14 4:17 pm Purchase | 13G | ATARA BIOTHERAPEUTICS INC ATRA | CITADEL ADVISORS LLC | 260,480 4.600% | 260,480 (New Position) | View |
| 2024-11-12 1:29 pm Unchanged | 13G | ATARA BIOTHERAPEUTICS INC ATRA | VANGUARD GROUP INC | 180,715 3.180% | 0 (Unchanged) | View |
| 2024-11-04 11:24 am Purchase | 13G | ATARA BIOTHERAPEUTICS INC ATRA | VANGUARD GROUP INC | 180,715 3.180% | 180,715 (New Position) | View |
| 2024-09-13 4:01 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | Redmile Group LLC | 579,541 9.900% | -9,721,868 (-94.37%) | View |
| 2024-09-05 4:07 pm Sale | 13D | ATARA BIOTHERAPEUTICS INC ATRA | Adiumentum Capital Fund I LP | 1,134,322 19.990% | -6,931,601 (-85.94%) | View |
| 2024-07-08 4:32 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | BlackRock Inc. BLK | 0 0.000% | -7,087,213 (Position Closed) | View |
| 2024-05-22 6:18 pm Purchase | 13D | ATARA BIOTHERAPEUTICS INC ATRA | Adiumentum Capital Fund I LP | 8,065,923 6.700% | 8,065,923 (New Position) | View |
| 2024-03-18 4:13 pm Purchase | 13G | ATARA BIOTHERAPEUTICS INC ATRA | CITADEL ADVISORS LLC | 6,533,119 6.400% | 6,533,119 (New Position) | View |
| 2024-02-14 5:03 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | MAVERICK CAPITAL LTD | 0 0.000% | -6,291,013 (Position Closed) | View |
| 2024-02-14 4:26 pm Purchase | 13G | ATARA BIOTHERAPEUTICS INC ATRA | Redmile Group LLC | 10,301,409 9.900% | 463,916 (+4.72%) | View |
| 2024-02-13 4:58 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | VANGUARD GROUP INC | 6,686,043 6.560% | -525,005 (-7.28%) | View |
| 2024-02-09 4:22 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | WASATCH ADVISORS LP | 0 0.000% | -8,391,014 (Position Closed) | View |
| 2024-02-06 4:45 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | GOLDMAN SACHS GROUP INC GS | 580,629 0.600% | -5,527,631 (-90.49%) | View |
| 2024-01-26 5:25 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | BlackRock Inc. BLK | 7,087,213 7.000% | -2,064,936 (-22.56%) | View |
| 2024-01-22 1:58 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | STATE STREET CORP STT | 2,784,200 2.730% | -4,865,540 (-63.60%) | View |
| 2024-01-09 4:22 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | BAUPOST GROUP LLC | 0 0.000% | -8,123,616 (Position Closed) | View |
| 2023-12-07 2:45 pm Sale | 13G | ATARA BIOTHERAPEUTICS INC ATRA | JPMORGAN CHASE & CO JPM | 2,206,929 2.100% | -5,303,643 (-70.62%) | View |
| 2023-11-20 7:00 pm Purchase | 13G | ATARA BIOTHERAPEUTICS INC ATRA | EcoR1 Capital LLC | 10,067,043 9.900% | 10,067,043 (New Position) | View |
| 2023-02-14 4:18 pm Purchase | 13G | ATARA BIOTHERAPEUTICS INC ATRA | Redmile Group LLC | 9,837,493 9.900% | 738,768 (+8.12%) | View |