Atara Biotherapeutics, Inc. (ATRA)
Nasdaq · Biological Products, (No Diagnostic Substances) · Inc. DE
What they're doing
Between 2026-06-21 and 2026-09-19, public records show 2 signals for Atara Biotherapeutics, Inc.. Most notable: 2026-09-04: Cherry Brian N (director) bought $1000k of stock; 2026-06-26: Filed 8-K disclosing director or officer change. Federal contract obligations over the last 24 months total $0. This summary was assembled automatically from SEC EDGAR, USAspending.gov, U.S. Senate lobbying disclosures and Wikimedia pageview counts.
Generated 2026-09-19 from public records.
Signals, last 12 months
- Insider purchaseCherry Brian N (director) bought $1000k of stock
- Material 8-K filingFiled 8-K disclosing director or officer change
- Material 8-K filingFiled 8-K disclosing director or officer change
- Insider purchaseEcoR1 Capital, LLC (ten_percent_owner) bought $4.7M of stock
- Large insider salePanacea Innovation Ltd (ten_percent_owner) sold $3.2M of stock
- Material 8-K filingFiled 8-K disclosing material agreement
- Material 8-K filingFiled 8-K disclosing material agreement
Insider transactions
| Date | Insider | Role | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-04 | Cherry Brian N | director | P | 104,166 | 9.6 | $999,994 |
| 2026-06-11 | Cherry Brian N | director | A | 24,000 | 0 | $0 |
| 2026-06-09 | HEIDEN WILLIAM K | director | A | 12,000 | 0 | $0 |
| 2026-06-09 | Fust Matthew K | director | A | 12,000 | 0 | $0 |
| 2026-06-09 | Ciongoli Gregory Austin | director | A | 12,000 | 0 | $0 |
| 2026-05-18 | Nguyen AnhCo | director | S | 5,241 | 9.13 | $47,850 |
| 2026-05-18 | Grant-Huerta Yanina | officer | S | 2,414 | 9.13 | $22,040 |
| 2026-05-07 | Panacea Innovation Ltd | ten percent owner | S | 313,446 | 10.1 | $3,165,805 |
| 2026-05-07 | EcoR1 Capital, LLC | ten percent owner | P | 507,407 | 9.35 | $4,744,255 |
| 2026-03-17 | Panacea Innovation Ltd | ten percent owner | M | 259,163 | 0 | $0 |
| 2026-03-17 | Panacea Innovation Ltd | ten percent owner | F | 5 | 5.23 | $26 |
| 2026-03-09 | Nguyen AnhCo | director | A | 81,100 | 0 | $0 |
| 2026-03-09 | Grant-Huerta Yanina | officer | A | 20,300 | 0 | $0 |
| 2026-03-02 | Grant-Huerta Yanina | officer | S | 377 | 5.08 | $1,915 |
| 2026-03-02 | Grant-Huerta Yanina | officer | S | 1,603 | 5.08 | $8,143 |
| 2026-03-02 | Grant-Huerta Yanina | officer | S | 24 | 5.08 | $122 |
| 2026-03-02 | Grant-Huerta Yanina | officer | S | 100 | 5.08 | $508 |
| 2026-03-02 | Nguyen AnhCo | director | S | 58 | 5.08 | $295 |
| 2026-03-02 | Nguyen AnhCo | director | S | 1,298 | 5.09 | $6,607 |
| 2026-03-02 | Nguyen AnhCo | director | S | 198 | 5.08 | $1,006 |
| 2026-03-02 | Nguyen AnhCo | director | S | 1,442 | 5.09 | $7,340 |
| 2026-01-12 | Huang James | director | S | 80,554 | 6.07 | $488,963 |
| 2025-11-28 | Panacea Innovation Ltd | ten percent owner | F | 1 | 14.03 | $14 |
| 2025-11-28 | Panacea Innovation Ltd | ten percent owner | M | 48,737 | 0 | $0 |
| 2025-11-17 | Nguyen AnhCo | director | S | 56 | 13.19 | $739 |
| 2025-11-17 | Nguyen AnhCo | director | S | 2,859 | 13.19 | $37,710 |
| 2025-11-17 | Grant-Huerta Yanina | officer | S | 1,645 | 13.19 | $21,698 |
| 2025-11-17 | Grant-Huerta Yanina | officer | S | 74 | 13.19 | $976 |
| 2025-11-17 | Grant-Huerta Yanina | officer | S | 85 | 13.19 | $1,121 |
| 2025-08-18 | Nguyen AnhCo | director | S | 57 | 11.61 | $662 |
| 2025-08-18 | Nguyen AnhCo | director | S | 1,620 | 11.62 | $18,824 |
| 2025-08-18 | Nguyen AnhCo | director | S | 1,281 | 11.62 | $14,885 |
| 2025-08-18 | Grant-Huerta Yanina | officer | S | 55 | 11.61 | $639 |
| 2025-08-18 | Grant-Huerta Yanina | officer | S | 86 | 11.61 | $998 |
| 2025-08-18 | Grant-Huerta Yanina | officer | S | 1,668 | 11.61 | $19,365 |
| 2025-08-15 | Panacea Innovation Ltd | ten percent owner | P | 55,000 | 12.19 | $670,450 |
| 2025-07-17 | Huang James | director | P | 19,335 | 9.64 | $186,389 |
| 2025-06-10 | Gallagher Carol Giltner | director | A | 7,828 | 0 | $0 |
| 2025-06-10 | Fust Matthew K | director | A | 7,828 | 0 | $0 |
| 2025-06-10 | Touchon Pascal | director | A | 7,828 | 0 | $0 |
| 2025-06-10 | Roncarolo Maria Grazia | director | A | 7,828 | 0 | $0 |
| 2025-06-10 | MALLIK AMEET | director | A | 7,828 | 0 | $0 |
| 2025-06-10 | HEIDEN WILLIAM K | director | A | 7,828 | 0 | $0 |
| 2025-05-16 | Grant-Huerta Yanina | officer | S | 2,218 | 6.76 | $14,994 |
| 2025-05-16 | Nguyen AnhCo | director | S | 3,276 | 6.76 | $22,146 |
| 2025-05-16 | Adiumentum Capital Fund I GP LLC | director | A | 75,572 | 6.61 | $499,531 |
| 2025-03-03 | Nguyen AnhCo | director | S | 3,331 | 7 | $23,317 |
| 2025-03-03 | Hyllengren Eric J | officer | S | 1,211 | 7 | $8,477 |
| 2025-03-03 | Henrich Jill | officer | S | 1,059 | 7 | $7,413 |
| 2025-01-27 | Hyllengren Eric J | officer | A | 34,050 | 0 | $0 |
Federal contracts
No federal contract actions on record for this recipient mapping.
Lobbying
No federal lobbying filings on record for this client mapping.
Public attention
No Wikipedia pageview data linked to this company.