Huang James (CIK 1573160) reported 9 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-06-02). Recent activity: Buy CNTB (150,000 shares), Sell ATRA (313,446 shares), Buy ATRA (259,163 shares), Sell ATRA (5 shares), Sell ATRA (80,554 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-02 | Connect Biopharma Holdings Ltd (CNTB) | Director | Buy | 150,000 | $371,610 |
| 2026-05-11 | Atara Biotherapeutics, Inc. (ATRA) | Director | Sell | 313,446 | $3.2M |
| 2026-03-19 | Atara Biotherapeutics, Inc. (ATRA) | Director | Buy | 259,163 | $0 |
| 2026-03-19 | Atara Biotherapeutics, Inc. (ATRA) | Director | Sell | 5 | $26 |
| 2026-01-14 | Atara Biotherapeutics, Inc. (ATRA) | Director | Sell | 80,554 | $488,963 |
| 2025-12-01 | Atara Biotherapeutics, Inc. (ATRA) | Director | Buy | 48,737 | $0 |
| 2025-12-01 | Atara Biotherapeutics, Inc. (ATRA) | Director | Sell | 1 | $14 |
| 2025-08-19 | Atara Biotherapeutics, Inc. (ATRA) | Director | Buy | 55,000 | $670,450 |
| 2025-07-21 | Atara Biotherapeutics, Inc. (ATRA) | Director | Buy | 19,335 | $186,389 |
Source: SEC Form 4 filings · as of 2026-06-02