CIK 0001604464 · Non-accelerated filer<br>Smaller reporting company
Atara Biotherapeutics, Inc.
Sign in to watch- Ticker
- ATRA
- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 460920988
- Phone
- 805-623-4211
- Business address
- 1280 RANCHO CONEJO BLVD, THOUSAND OAKS, CA, 91320
- Open-market buys, last 90 days
- $999,994
- in 1 filing
- Open-market sales, last 90 days
- $40,883
- in 1 filing
Net +$959,111. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-03-02 | Grant-Huerta Yanina Chief Accounting Officer | Sale | −24 | $5.08 | $122 | 33,830 |
| 2026-03-02 | Grant-Huerta Yanina Chief Accounting Officer | Sale | −1,603 | $5.08 | $8K | 32,227 |
| 2026-03-02 | Grant-Huerta Yanina Chief Accounting Officer | Sale | −377 | $5.08 | $2K | 31,850 |
| 2026-03-02 | Grant-Huerta Yanina Chief Accounting Officer | Sale | −100 | $5.08 | $508 | 31,750 |
| 2026-03-02 | Nguyen AnhCo President and CEO | Sale | −198 | $5.08 | $1K | 64,776 |
| 2026-03-02 | Nguyen AnhCo President and CEO | Sale | −58 | $5.08 | $295 | 64,718 |
| 2026-03-02 | Nguyen AnhCo President and CEO | Sale | −1,298 | $5.09 | $7K | 63,420 |
| 2026-03-02 | Nguyen AnhCo President and CEO | Sale | −1,442 | $5.09 | $7K | 61,978 |
| 2026-01-12 | Panacea Innovation Ltd 10% owner | Sale | −80,554 | $6.07 | $489K | 1,324,446 |
| 2025-11-28 | Panacea Innovation Ltd 10% owner | Option exercise | +48,737 | $0.00 | $5 | 48,737 |
| 2025-11-28 | Panacea Innovation Ltd 10% owner | Shares withheld for taxes | −1 | $14.03 | $14 | 48,736 |
| 2025-11-28 | Panacea Innovation Ltd 10% owner | Option exercise · Warrants | −48,737 | $6.61 | $322K | 259,163 |
| 2025-11-17 | Nguyen AnhCo President and CEO | Sale | −2,859 | $13.19 | $38K | 65,030 |
| 2025-11-17 | Nguyen AnhCo President and CEO | Sale | −56 | $13.19 | $739 | 64,974 |
| 2025-11-17 | Grant-Huerta Yanina Chief Accounting Officer | Sale | −1,645 | $13.19 | $22K | 33,613 |
| 2025-11-17 | Grant-Huerta Yanina Chief Accounting Officer | Sale | −85 | $13.19 | $1K | 33,528 |
| 2025-11-17 | Grant-Huerta Yanina Chief Accounting Officer | Sale | −74 | $13.19 | $976 | 33,454 |
| 2025-08-18 | Nguyen AnhCo President and CEO | Sale | −57 | $11.61 | $662 | 70,790 |
| 2025-08-18 | Nguyen AnhCo President and CEO | Sale | −1,281 | $11.62 | $15K | 69,509 |
| 2025-08-18 | Nguyen AnhCo President and CEO | Sale | −1,620 | $11.62 | $19K | 67,889 |
Page 2 of 17 · 334 trades