Chen Sean Chihhsiang
SEC CIK 2078559 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| AMBQ | Ambiq Micro, Inc. | Pres, COO | 135.3K | — | $5.71M | 9 | 2025-10-02 | 2026-09-14 |
Most active insiders at AMBQ, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Esaka Fumihide | CEO, Dir | — | $15.22M |
| 2 | Chen Sean Chihhsiang | Pres, COO | — | $5.71M |
| 3 | Chen Timothy | Dir | — | $5.63M |
| 4 | Hanson Scott McLean | CTO, Dir | — | $5.17M |
| 5 | Winzeler Jeffrey G | CFO | — | $1.82M |
| 6 | ZHANG KER | Dir | — | $644.9K |
| 7 | TAUTGES JOSEPH A | Dir | — | $241.8K |
| 8 | Connors Michele Kim | GC | — | $21.2K |
| 9 | Banks Bernard Bennett | Dir | — | — |
| 10 | HSIEH Wen Hsuan | Dir | — | — |
Transactions 9
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2026-09-15 18:57 | 2026-09-14 | AMBQ | Ambiq Micro, Inc. | Chen Sean Chihhsiang | Pres, COO | M - OptEx | $8.12 | +15.0K | 135.3K | +12% | +$121.8K |
| DMT | 2026-09-15 18:57 | 2026-09-14 | AMBQ | Ambiq Micro, Inc. | Chen Sean Chihhsiang | Pres, COO | S - Sale+OE | $60.14 | -15.0K | 120.3K | -11% | -$902.1K |
| DT | 2026-09-09 17:10 | 2026-09-04 | AMBQ | Ambiq Micro, Inc. | Chen Sean Chihhsiang | Pres, COO | M - OptEx | $8.12 | +15.0K | 135.3K | +12% | +$121.8K |
| DMT | 2026-09-09 17:10 | 2026-09-04 | AMBQ | Ambiq Micro, Inc. | Chen Sean Chihhsiang | Pres, COO | S - Sale+OE | $57.17 | -15.0K | 120.3K | -11% | -$857.6K |
| D | 2026-05-18 17:48 | 2026-05-15 | AMBQ | Ambiq Micro, Inc. | Chen Sean Chihhsiang | Pres, COO | M - OptEx | $5.88 | +55.7K | 176.0K | +46% | +$327.4K |
| DM | 2026-05-18 17:48 | 2026-05-15 | AMBQ | Ambiq Micro, Inc. | Chen Sean Chihhsiang | Pres, COO | S - Sale+OE | $70.89 | -55.7K | 120.3K | -32% | -$3.95M |
| A | 2026-04-02 16:35 | 2026-03-06 | AMBQ | Ambiq Micro, Inc. | Chen Sean Chihhsiang | Pres, COO | A - Grant | $0.00 | +64.2K | 120.3K | +115% | $0 |
| 2026-03-10 | 2026-03-06 | AMBQ | Ambiq Micro, Inc. | Chen Sean Chihhsiang | Pres, COO | A - Grant | $0.00 | +64.2K | 120.3K | +115% | $0 | |
| 2025-10-06 | 2025-10-02 | AMBQ | Ambiq Micro, Inc. | Chen Sean Chihhsiang | Pres, COO | A - Grant | $0.00 | +56.0K | 56.0K | New | $0 |
Purchase Sale Sale after option exercise All abbreviations