ZHANG KER (CIK 1266870) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-06-10). Recent activity: Buy AMBQ (4,957 shares), Buy AMBQ (23,809 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-10 | Ambiq Micro, Inc. (AMBQ) | Director | Buy | 4,957 | $0 |
| 2025-07-31 | Ambiq Micro, Inc. (AMBQ) | Director | Buy | 23,809 | $0 |
Source: SEC Form 4 filings · as of 2026-06-10