ZHANG KER
SEC CIK 1266870 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| AMBQ | Ambiq Micro, Inc. | Dir | 20.4K | — | $644.9K | 5 | 2025-07-29 | 2026-09-11 |
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 5
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M | 2026-09-15 18:58 | 2026-09-11 | AMBQ | Ambiq Micro, Inc. | ZHANG KER | Dir | S - Sale | $63.44 | -10.0K | 20.4K | -33% | -$634.4K |
| D | 2026-09-09 17:08 | 2026-09-04 | AMBQ | Ambiq Micro, Inc. | ZHANG KER | Dir | M - OptEx | $5.88 | +1,785 | 30.6K | +6% | +$10.5K |
| D | 2026-09-09 17:08 | 2026-09-04 | AMBQ | Ambiq Micro, Inc. | ZHANG KER | Dir | S - Sale+OE | $56.92 | -185 | 30.4K | -0.6% | -$10.5K |
| 2026-06-10 16:42 | 2026-06-08 | AMBQ | Ambiq Micro, Inc. | ZHANG KER | Dir | A - Grant | $0.00 | +4,957 | 28.8K | +21% | $0 | |
| 2025-07-31 | 2025-07-29 | AMBQ | Ambiq Micro, Inc. | ZHANG KER | Dir | A - Grant | $0.00 | +23.8K | 23.8K | New | $0 |
Purchase Sale Sale after option exercise All abbreviations