Chen Sean Chihhsiang (CIK 2078559) reported 6 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-18). Recent activity: Buy AMBQ (55,685 shares), Sell AMBQ (32,351 shares), Sell AMBQ (23,334 shares), Buy AMBQ (64,246 shares), Buy AMBQ (64,246 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-18 | Ambiq Micro, Inc. (AMBQ) | President and COO | Buy | 55,685 | $327,428 |
| 2026-05-18 | Ambiq Micro, Inc. (AMBQ) | President and COO | Sell | 32,351 | $2.3M |
| 2026-05-18 | Ambiq Micro, Inc. (AMBQ) | President and COO | Sell | 23,334 | $1.7M |
| 2026-04-02 | Ambiq Micro, Inc. (AMBQ) | President and COO | Buy | 64,246 | $0 |
| 2026-03-10 | Ambiq Micro, Inc. (AMBQ) | President and COO | Buy | 64,246 | $0 |
| 2025-10-06 | Ambiq Micro, Inc. (AMBQ) | President and COO | Buy | 56,029 | $0 |
Source: SEC Form 4 filings · as of 2026-05-18