🕵️ Ambiq Micro, Inc. ($AMBQ)
SEC insider & ownership activity, last 12 months · CIK 1500412 · every row links its SEC filing
Over the last 12 months insiders sold $16.9M with no open-market buying against it. Chen Timothy sold $5.6M (May). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 7 sellers, $16.9M (16 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Chen Timothy | 0 | – | 4 | $5.6M | May 27, 2026 |
| Fumihide Esaka | 0 | – | 1 | $4.2M | May 14, 2026 |
| Sean Chen | 0 | – | 2 | $3.9M | May 15, 2026 |
| Jeffrey G. Winzeler | 0 | – | 2 | $1.8M | May 14, 2026 |
| Scott Hanson | 0 | – | 4 | $1.0M | May 14, 2026 |
| Joseph A. Tautges | 0 | – | 1 | $242K | Jan 26, 2026 |
| Connors Michele Kim | 0 | – | 2 | $21K | Apr 2, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| KPCB XVI Associates, LLC | 8.2% | 13G | Nov 3, 2025 | filing ↗ | |
| Kleiner Perkins Caufield & Byers XVI, LLC | 7.9% | 13G | Nov 3, 2025 | filing ↗ | |
| T. ROWE Price Investment Management, Inc. | 6.0% | 13G | May 15, 2026 | filing ↗ | |
| Blackrock, Inc. | 5.3% | 13G | Jul 27, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Triumph WAY Investment Inc | $5.6M | May 27, 2026 | filing ↗ |
| Sean Chen | $3.9M | May 15, 2026 | filing ↗ |
| Jeff G Winzeler | $1.8M | May 14, 2026 | filing ↗ |
| Scott Hanson | $706K | May 14, 2026 | filing ↗ |
| Fumihide Esaka | $4.2M | May 14, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Shareholder vote (5.07) | Jun 8, 2026 | filing ↗ |
| Earnings (2.02) | May 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 12, 2026 | filing ↗ |
| Earnings (2.02) | Mar 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 5, 2026 | filing ↗ |
| Earnings (2.02) | Jan 21, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 5, 2026 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |
| Officer/director changes (5.02) | Sep 29, 2025 | filing ↗ |
| Earnings (2.02) | Sep 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 4, 2025 | filing ↗ |
| Charter/bylaw changes (5.03) | Jul 31, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 31, 2025 | filing ↗ |