Esaka Fumihide
SEC CIK 2078454 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| AMBQ | Ambiq Micro, Inc. | CEO, Dir | 474.0K | — | $15.22M | 12 | 2025-10-02 | 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 12
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DMT | 2026-09-15 18:56 | 2026-09-11+ | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | M - OptEx | $11.65 | +63.5K | 474.0K | +15% | +$739.6K |
| DMT | 2026-09-15 18:56 | 2026-09-11+ | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | S - Sale+OE | $62.70 | -63.5K | 460.5K | -12% | -$3.98M |
| DMT | 2026-09-02 16:47 | 2026-08-31+ | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | M - OptEx | $12.09 | +117.8K | 471.5K | +33% | +$1.42M |
| DMT | 2026-09-02 16:47 | 2026-08-31+ | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | S - Sale+OE | $56.89 | -108.5K | 460.5K | -19% | -$6.17M |
| DT | 2026-08-18 16:30 | 2026-08-14 | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | M - OptEx | $8.12 | +13.5K | 464.7K | +3% | +$109.6K |
| DMT | 2026-08-18 16:30 | 2026-08-14 | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | S - Sale+OE | $64.39 | -13.5K | 451.2K | -3% | -$869.2K |
| DM | 2026-05-18 17:44 | 2026-05-14+ | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | M - OptEx | $8.66 | +120.0K | 451.2K | +36% | +$1.04M |
| D | 2026-05-18 17:44 | 2026-05-14 | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | S - Sale+OE | $70.02 | -60.0K | 391.2K | -13% | -$4.20M |
| A | 2026-04-02 16:34 | 2026-03-06 | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | A - Grant | $0.00 | +160.6K | 391.2K | +70% | $0 |
| 2026-03-10 | 2026-03-06 | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | A - Grant | $0.00 | +160.6K | 391.2K | +70% | $0 | |
| D | 2026-02-10 | 2025-10-07 | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | M - OptEx | $5.88 | +53.7K | 230.6K | +30% | +$315.5K |
| 2025-10-06 | 2025-10-02 | AMBQ | Ambiq Micro, Inc. | Esaka Fumihide | CEO, Dir | A - Grant | $0.00 | +159.9K | 176.9K | +940% | $0 |
Purchase Sale Sale after option exercise All abbreviations