Separate the three disclosure sources
Recent Form 4 activity
Atara Biotherapeutics, Inc: source evidence dated 2026-10-10T12:08:28.848Z.
- Available
- 2026-09-05
- Trade date
- 2026-09-04
- Reporting owners
- Cherry Brian N
- Code
- P
- Shares
- 104,166
- Reported value
- Not reported
The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.
Is this an insider transaction, 13F holding, or Congressional event?
Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.
SEC 0000905148-26-004085Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.
Read ATRA fundamentals
Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.
Read ATRA fundamentalsKeep reporting dates and units beside the answer, and inspect its original citations.
Recent Form 4 activity
See the complete recent form 4 activity
| 2026-09-05 | 2026-09-04 | Cherry Brian N | P | 104,166 | Not reported |
| 2026-08-27 | 2026-08-17 | Nguyen AnhCo | S | 5,062 | Not reported |
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90-day public availability window, up to 50 records.
Recent institutional filing receipts
These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.
| XTX Topco Ltd | 2026-06-30 | 2026-08-15 | 15,303 | $175,678 | None |
| OSAIC HOLDINGS, INC. | 2026-06-30 | 2026-08-15 | 10 | $114 | None |
| JANE STREET GROUP, LLC | 2026-06-30 | 2026-08-15 | 9 | $103 | None |
| JANE STREET GROUP, LLC | 2026-06-30 | 2026-08-15 | 30,336 | $348,257 | None |
| MILLENNIUM MANAGEMENT LLC | 2026-06-30 | 2026-08-15 | 12,680 | $145,566 | None |
| JONES FINANCIAL COMPANIES LLLP | 2026-06-30 | 2026-08-15 | 803 | $8,440 | None |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2026-06-30 | 2026-08-15 | 850,000 | $9,758,000 | None |
| ROYAL BANK OF CANADA | 2026-06-30 | 2026-08-15 | 3,650 | $42,000 | None |
| ROYAL BANK OF CANADA | 2026-06-30 | 2026-08-15 | 1,093 | $13,000 | None |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 2026-06-30 | 2026-08-15 | 14,000 | $160,720 | None |
| CITADEL ADVISORS LLC | 2026-06-30 | 2026-08-15 | 10,123 | $116,212 | None |
| CITADEL ADVISORS LLC | 2026-06-30 | 2026-08-15 | 36 | $413 | None |
| Redmile Group, LLC | 2026-06-30 | 2026-08-15 | 441,701 | $5,070,727 | None |
| EcoR1 Capital, LLC | 2026-06-30 | 2026-08-15 | 1,552,000 | $17,816,960 | None |
| Point72 Asset Management, L.P. | 2026-06-30 | 2026-08-15 | 687,718 | $7,895,003 | None |
| BARCLAYS PLC | 2026-06-30 | 2026-08-15 | 304 | $3,490 | None |
| WELLS FARGO & COMPANY/MN | 2026-06-30 | 2026-08-15 | 251 | $2,881 | None |
| VANGUARD CAPITAL MANAGEMENT LLC | 2026-06-30 | 2026-08-14 | 247,047 | $2,836,100 | None |
| Vanguard Global Advisers, LLC | 2026-06-30 | 2026-08-14 | 1,456 | $16,715 | None |
| Rockefeller Capital Management L.P. | 2026-06-30 | 2026-08-14 | 8 | $92 | None |
| UBS Group AG | 2026-06-30 | 2026-08-14 | 465 | $5,338 | None |
| UBS Group AG | 2026-06-30 | 2026-08-14 | 3,514 | $40,341 | None |
| BNP PARIBAS FINANCIAL MARKETS | 2026-06-30 | 2026-08-14 | 46 | $528 | None |
| ACADIAN ASSET MANAGEMENT LLC | 2026-06-30 | 2026-08-14 | 38,845 | $444,000 | None |
| MACKENZIE FINANCIAL CORP | 2026-06-30 | 2026-08-14 | 233,249 | $2,677,699 | None |
| VANGUARD FIDUCIARY TRUST CO | 2026-06-30 | 2026-08-14 | 43,036 | $494,053 | None |
| MORGAN STANLEY | 2026-06-30 | 2026-08-14 | 5 | $57 | None |
| MORGAN STANLEY | 2026-06-30 | 2026-08-14 | 1 | $16 | None |
| MORGAN STANLEY | 2026-06-30 | 2026-08-14 | 4 | $46 | None |
| MORGAN STANLEY | 2026-06-30 | 2026-08-14 | 9,002 | $103,343 | None |
| MORGAN STANLEY | 2026-06-30 | 2026-08-14 | 166 | $1,906 | None |
| FMR LLC | 2026-06-30 | 2026-08-14 | 16,238 | $186,412 | None |
| NORTHERN TRUST CORP | 2026-06-30 | 2026-08-14 | 16,568 | $190,201 | None |
| NORTHERN TRUST CORP | 2026-06-30 | 2026-08-14 | 23 | $264 | None |
| GEODE CAPITAL MANAGEMENT, LLC | 2026-06-30 | 2026-08-13 | 12,364 | $141,938 | None |
| GEODE CAPITAL MANAGEMENT, LLC | 2026-06-30 | 2026-08-13 | 62,764 | $720,986 | None |
| JPMORGAN CHASE & CO | 2026-06-30 | 2026-08-13 | 116 | $1,296 | None |
| JPMORGAN CHASE & CO | 2026-06-30 | 2026-08-13 | 100 | $1,117 | None |
| STALEY CAPITAL ADVISERS INC | 2026-06-30 | 2026-08-12 | 50,000 | $574,000 | None |
| BlackRock, Inc. | 2026-06-30 | 2026-08-08 | 55,821 | $640,825 | None |
| BlackRock, Inc. | 2026-06-30 | 2026-08-08 | 17,227 | $197,766 | None |
| BlackRock, Inc. | 2026-06-30 | 2026-08-08 | 1,147 | $13,168 | None |
| BlackRock, Inc. | 2026-06-30 | 2026-08-08 | 10,260 | $117,785 | None |
| STATE STREET CORP | 2026-06-30 | 2026-08-08 | 26,453 | $303,680 | None |
| Caitong International Asset Management Co., Ltd | 2026-06-30 | 2026-08-06 | 311 | $3,570 | None |
| Raiffeisen Bank International AG | 2026-06-30 | 2026-08-04 | 200 | $2,296 | Call |
| CITIGROUP INC | 2026-06-30 | 2026-08-04 | 97 | $1,114 | None |
| Banque Transatlantique SA | 2026-06-30 | 2026-07-31 | 176 | $3,096 | None |
| SBI Securities Co., Ltd. | 2026-06-30 | 2026-07-24 | 1,404 | $16,118 | None |
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90-day public filing window, up to 50 source positions.
Recent Congressional disclosures
No matching Congressional transactions were returned in this source preview.
No records are available for this view.
Bounded public source preview, up to 25 disclosed events.
How to read the disclosure dates
The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.
Company insiders
SEC Form 4 purchases, sales and awards report transactions and their public filing availability.
Institutional managers
13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.
Congressional filers
Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.
Read the transaction codes
Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.