Nguyen AnhCo (CIK 1977970) reported 13 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-20). Recent activity: Sell ATRA (5,241 shares), Buy ATRA (81,100 shares), Sell ATRA (198 shares), Sell ATRA (58 shares), Sell ATRA (1,298 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-20 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 5,241 | $47,845 |
| 2026-03-11 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Buy | 81,100 | $0 |
| 2026-03-04 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 198 | $1,006 |
| 2026-03-04 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 58 | $295 |
| 2026-03-04 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 1,298 | $6,607 |
| 2026-03-04 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 1,442 | $7,340 |
| 2025-11-19 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 2,859 | $37,710 |
| 2025-11-19 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 56 | $739 |
| 2025-08-20 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 57 | $662 |
| 2025-08-20 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 1,281 | $14,885 |
| 2025-08-20 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 1,620 | $18,824 |
| 2025-05-20 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 3,276 | $22,146 |
| 2025-03-05 | Atara Biotherapeutics, Inc. (ATRA) | President and CEO | Sell | 3,331 | $23,317 |
Source: SEC Form 4 filings · as of 2026-05-20