In the last 12 months, insiders at Ambiq Micro made open-market sales of $34.46 million (535.67K shares) and bought no shares on the open market.
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Xvi Associates, Llc Kpcb | TenPercentOwner | 0 | 2,661,028 | 2,661,028 | 70.7% | 31 Jul, 2025 |
| 2 | Fumihide Esaka | Chief Executive Officer | 460,460 | 0 | 460,460 | 12.2% | 15 Sep, 2026 |
| 3 | Scott Mclean Hanson | Chief Technology Officer | 221,226 | 0 | 221,226 | 5.9% | 17 Sep, 2026 |
| 4 | Sean Chihhsiang Chen | President And Coo | 120,275 | 0 | 120,275 | 3.2% | 15 Sep, 2026 |
| 5 | Jeffrey G Winzeler | Chief Financial Officer | 106,299 | 0 | 106,299 | 2.8% | 04 Jun, 2026 |
| 6 | Michele Kim Connors | General Counsel | 60,554 | 0 | 60,554 | 1.6% | 06 Apr, 2026 |
| 7 | Joseph A Tautges | Director | 53,703 | 0 | 53,703 | 1.4% | 10 Jun, 2026 |
| 8 | Timothy Chen | Director | 52,575 | 0 | 52,575 | 1.4% | 10 Jun, 2026 |
| 9 | Ker Zhang | Director | 20,366 | 0 | 20,366 | 0.5% | 15 Sep, 2026 |
| 10 | Bernard Bennett Banks | Director | 4,957 | 0 | 4,957 | 0.1% | 10 Jun, 2026 |
| 11 | Wen Hsuan Hsieh | Director | 4,957 | 0 | 4,957 | 0.1% | 10 Jun, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 15 Sep, 2026 | Scott Mclean Hanson | Chief Technology Officer | Acquired M | 7,000 | $8.12 | $56.84K | 228,226 | Direct |
| 15 Sep, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed S | 1,953 | $59.53 | $116.27K | 226,273 | Direct |
| 15 Sep, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed S | 4,947 | $60.56 | $299.57K | 221,326 | Direct |
| 15 Sep, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed S | 100 | $61.00 | $6.10K | 221,226 | Direct |
| 15 Sep, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed M | 7,000 | $0.00 | $0 | 45,279 | Direct |
| 04 Sep, 2026 | Sean Chihhsiang Chen | President And Coo | Acquired M | 15,000 | $8.12 | $121.80K | 135,275 | Direct |
| 04 Sep, 2026 | Ker Zhang | Director | Acquired M | 1,785 | $5.88 | $10.50K | 30,551 | Direct |
| 04 Sep, 2026 | Sean Chihhsiang Chen | President And Coo | Disposed S | 12,874 | $57.09 | $734.93K | 122,401 | Direct |
| 04 Sep, 2026 | Ker Zhang | Director | Disposed S | 185 | $56.92 | $10.53K | 30,366 | Direct |
| 04 Sep, 2026 | Ker Zhang | Director | Disposed M | 1,785 | $0.00 | $0 | 0 | Direct |
| 04 Sep, 2026 | Sean Chihhsiang Chen | President And Coo | Disposed S | 2,126 | $57.68 | $122.62K | 120,275 | Direct |
| 04 Sep, 2026 | Sean Chihhsiang Chen | President And Coo | Disposed M | 15,000 | $0.00 | $0 | 149,423 | Direct |
| 31 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Acquired M | 13,500 | $8.12 | $109.62K | 464,689 | Direct |
| 31 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Disposed S | 5,899 | $56.87 | $335.45K | 458,790 | Direct |
| 31 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Disposed S | 5,501 | $57.75 | $317.71K | 453,289 | Direct |
| 31 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Disposed S | 2,100 | $58.52 | $122.89K | 451,189 | Direct |
| 31 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Acquired M | 44,271 | $12.60 | $557.81K | 495,460 | Direct |
| 31 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Disposed S | 15,600 | $56.81 | $886.22K | 479,860 | Direct |
| 31 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Disposed S | 13,800 | $57.70 | $796.28K | 466,060 | Direct |
| 31 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Disposed S | 5,600 | $58.46 | $327.36K | 460,460 | Direct |