Insider tradingForm 4
Ambiq Micro, Inc. (AMBQ) Insider Trading
22 open-market trades reported since Aug 18, 2026: 0 purchases worth $0 and 22 sales worth $22.1M.
By insider
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Sean Chihhsiang Chen | COO | 0 | $0 | 5 | $3.48M |
| Scott McLean Hanson | CTO | 0 | $0 | 6 | $5.12M |
| Fumihide Esaka | CEO | 0 | $0 | 8 | $12.4M |
| Jeffrey G. Winzeler | CFO | 0 | $0 | 1 | $380K |
| Ker Zhang | Director | 0 | $0 | 2 | $645K |
All trades
| Filed | Insider | Type | Value | 3 mo. after |
|---|---|---|---|---|
| Oct 16 | Sean Chihhsiang ChenCOO | ▼ SELL10b5-1 | $772K | |
| Oct 16 | Scott McLean HansonCTO | ▼ SELL10b5-1 | $357K | |
| Oct 16 | Fumihide EsakaCEO | ▼ SELL10b5-1 | $255K | |
| Oct 6 | Fumihide EsakaCEO | ▼ SELL | $1.15M | |
| Oct 6 | Scott McLean HansonCTO | ▼ SELL | $604K | |
| Oct 6 | Sean Chihhsiang ChenCOO | ▼ SELL10b5-1 | $548K | |
| Oct 6 | Sean Chihhsiang ChenCOO | ▼ SELL10b5-1 | $404K | |
| Oct 6 | Jeffrey G. WinzelerCFO | ▼ SELL | $380K | |
| Sep 17 | Scott McLean HansonCTO | ▼ SELL10b5-1 | $422K | |
| Sep 15 | Fumihide EsakaCEO | ▼ SELL10b5-1 | $3.17M | |
| Sep 15 | Sean Chihhsiang ChenCOO | ▼ SELL10b5-1 | $902K | |
| Sep 15 | Fumihide EsakaCEO | ▼ SELL10b5-1 | $814K | |
| Sep 15 | Ker ZhangDirector | ▼ SELL | $634K | |
| Sep 9 | Sean Chihhsiang ChenCOO | ▼ SELL10b5-1 | $858K | |
| Sep 9 | Ker ZhangDirector | ▼ SELL | $11K | |
| Sep 2 | Fumihide EsakaCEO | ▼ SELL10b5-1 | $2.79M | |
| Sep 2 | Fumihide EsakaCEO | ▼ SELL10b5-1 | $2.76M | |
| Sep 2 | Fumihide EsakaCEO | ▼ SELL10b5-1 | $625K | |
| Aug 28 | Scott McLean HansonCTO | ▼ SELL | $1.64M | |
| Aug 28 | Scott McLean HansonCTO | ▼ SELL | $1.64M | |
| Aug 18 | Fumihide EsakaCEO | ▼ SELL10b5-1 | $869K | |
| Aug 18 | Scott McLean HansonCTO | ▼ SELL10b5-1 | $451K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings