AMBQ Ambiq Micro, Inc.
Ambiq Micro, Inc. (AMBQ) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 29% planned / 71% discretionary
Largest single sale: $2.8M.
Where they traded
No open-market insider purchase on record.
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| Esaka Fumihide 3 fills | Chief Executive Officer | Sell 10b5-1 | 13,500 | $60.28 | $813.7K | 470,175 −2.8% of holding | |
| Hanson Scott McLean 3 fills | Chief Technology Officer | Sell 10b5-1 | 7,000 | $60.28 | $421.9K | 226,273 −3% of holding | |
| Chen Sean Chihhsiang 3 fills | President and COO | Sell 10b5-1 | 15,000 | $60.14 | $902.1K | 132,675 −10.2% of holding | |
| Esaka Fumihide 2 fills | Chief Executive Officer | Sell | 50,000 | $63.36 | $3.2M | 468,377 −9.6% of holding | |
| ZHANG KER 2 fills | Director | Sell | 10,000 | $63.44 | $634.4K | 21,266 −32% of holding | |
| Chen Sean Chihhsiang 2 fills | President and COO | Sell 10b5-1 | 15,000 | $57.17 | $857.6K | 122,401 −10.9% of holding | |
| ZHANG KER | Director | Sell | 185 | $56.92 | $10.5K | 30,366 −0.6% of holding | |
| Esaka Fumihide 2 fills | Chief Executive Officer | Sell | 11,027 | $56.69 | $625.1K | 470,035 −2.3% of holding |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.