Cherry Brian N (CIK 1290922) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-09-04). Recent activity: Buy ATRA (104,166 shares), Buy ATRA (24,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-04 | Atara Biotherapeutics, Inc. (ATRA) | Director | Buy | 104,166 | $999,994 |
| 2026-06-15 | Atara Biotherapeutics, Inc. (ATRA) | Director | Buy | 24,000 | $0 |
来源：SEC Form 4 申报文件 · 截至 2026-09-04