AMBQ (Ambiq Micro, Inc.)
Insider Trading Activity
Every open-market purchase and sale reported by AMBQ officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-28 | Scott McLean Hanson | Chief Technology Officer | MIXED | — | — |
| 2026-08-18 | Scott McLean Hanson | Chief Technology Officer | MIXED | — | — |
| 2026-08-18 | Fumihide Esaka | Chief Executive Officer | MIXED | — | — |
| 2026-06-10 | Bernard Bennett Banks | Director | A | — | — |
| 2026-06-10 | JOSEPH A TAUTGES | Director | A | — | — |
| 2026-06-10 | Timothy Chen | Director | A | — | — |
| 2026-06-10 | Wen Hsuan HSIEH | Director | A | — | — |
| 2026-06-10 | KER ZHANG | Director | A | — | — |
| 2026-06-04 | Jeffrey G Winzeler | Chief Financial Officer | M | — | — |
| 2026-05-29 | Timothy Chen | Director | C | — | — |
| 2026-05-29 | Timothy Chen | Director | Sell | — | — |
| 2026-05-18 | Scott McLean Hanson | Chief Technology Officer | MIXED | — | — |
| 2026-05-18 | Jeffrey G Winzeler | Chief Financial Officer | MIXED | — | — |
| 2026-05-18 | Sean Chihhsiang Chen | President and COO | MIXED | — | — |
| 2026-05-18 | Fumihide Esaka | Chief Executive Officer | MIXED | — | — |
| 2026-04-06 | Michele Kim Connors | General Counsel | Sell | — | — |
| 2026-04-02 | Jeffrey G Winzeler | Chief Financial Officer | A | — | — |
| 2026-04-02 | Fumihide Esaka | Chief Executive Officer | A | — | — |
| 2026-04-02 | Scott McLean Hanson | Chief Technology Officer | A | — | — |
| 2026-04-02 | Sean Chihhsiang Chen | President and COO | A | — | — |
| 2026-04-02 | Michele Kim Connors | General Counsel | A | — | — |
| 2026-03-10 | Jeffrey G Winzeler | Chief Financial Officer | A | — | — |
| 2026-03-10 | Fumihide Esaka | Chief Executive Officer | A | — | — |
| 2026-03-10 | Scott McLean Hanson | Chief Technology Officer | A | — | — |
| 2026-03-10 | Michele Kim Connors | General Counsel | A | — | — |
| 2026-03-10 | Sean Chihhsiang Chen | President and COO | A | — | — |
| 2026-02-20 | Wen Hsuan HSIEH | Director | M | — | — |
| 2026-02-10 | Fumihide Esaka | Chief Executive Officer | M | — | — |
| 2026-01-28 | Scott McLean Hanson | Chief Technology Officer | Sell | — | — |
| 2026-01-28 | JOSEPH A TAUTGES | Director | Sell | — | — |
| 2026-01-07 | Michele Kim Connors | General Counsel | A | — | — |
| 2025-10-06 | Fumihide Esaka | Chief Executive Officer | A | — | — |
| 2025-10-06 | Scott McLean Hanson | Chief Financial Officer | A | — | — |
| 2025-10-06 | Jeffrey G Winzeler | Chief Financial Officer | A | — | — |
| 2025-10-06 | Sean Chihhsiang Chen | President and COO | A | — | — |
| 2025-07-31 | JOSEPH A TAUTGES | Director | A | — | — |
| 2025-07-31 | Wen Hsuan HSIEH | Director | C | — | — |
| 2025-07-31 | Timothy Chen | Director | A | — | — |
| 2025-07-31 | KER ZHANG | Director | A | — | — |
| 2025-07-31 | KPCB XVI Associates, LLC | 10%+ Owner | C | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 1,172,079 | — |
| — | Director | 638,877 | — |
| — | Chief Executive Officer | 452,689 | — |
| — | Chief Technology Officer | 221,226 | — |
| — | President and COO | 175,960 | — |
| — | Chief Financial Officer | 106,299 | — |
| — | Director | 76,505 | — |
| — | General Counsel | 60,554 | — |
| — | Director | 53,703 | — |
| — | Director | 28,766 | — |
| — | Director | 4,957 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the AMBQ quote page; the site-wide leaderboard is on the insider transactions hub.