As of September 12, 2026, the three largest insider holders of AMBQ are Xvi Associates, Llc Kpcb (TenPercentOwner, 2.66Mn shares), Xvi Associates, Llc Kpcb (TenPercentOwner, 2.66Mn shares), Xvi Associates, Llc Kpcb (TenPercentOwner, 2.66Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Xvi Associates, Llc Kpcb | TenPercentOwner | 0 | 2,661,028 | 2,661,028 | 70.5% | 31 Jul, 2025 |
| 2 | Fumihide Esaka | Chief Executive Officer | 460,460 | 0 | 460,460 | 12.2% | 02 Sep, 2026 |
| 3 | Scott Mclean Hanson | Chief Technology Officer | 221,226 | 0 | 221,226 | 5.9% | 28 Aug, 2026 |
| 4 | Sean Chihhsiang Chen | President And Coo | 120,275 | 0 | 120,275 | 3.2% | 09 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 | 30,366 | 0 | 30,366 | 0.8% | 09 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 |
|---|---|---|---|---|---|---|---|---|
| 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 | Acquired M | 15,000 | $8.12 | $121.80K | 135,275 | 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 | Sean Chihhsiang Chen | President And Coo | Disposed S | 2,126 | $57.68 | $122.62K | 120,275 | 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 M | 15,000 | $0.00 | $0 | 149,423 | Direct |
| 26 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Acquired M | 10,000 | $8.12 | $81.20K | 221,226 | Direct |
| 26 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Acquired M | 27,500 | $8.12 | $223.30K | 248,726 | Direct |
| 26 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed S | 27,500 | $59.58 | $1.64Mn | 221,226 | Direct |
| 27 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Acquired M | 27,500 | $8.12 | $223.30K | 248,726 | Direct |
| 27 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed S | 22,590 | $59.69 | $1.35Mn | 226,136 | Direct |
| 27 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed S | 4,910 | $60.32 | $296.18K | 221,226 | Direct |
| 26 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed M | 10,000 | $0.00 | $0 | 52,279 | Direct |
| 26 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed M | 27,500 | $0.00 | $0 | 111,058 | Direct |
| 27 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Disposed M | 27,500 | $0.00 | $0 | 83,558 | Direct |
| 14 Aug, 2026 | Scott Mclean Hanson | Chief Technology Officer | Acquired M | 7,000 | $8.12 | $56.84K | 218,226 | Direct |
| 14 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Acquired M | 13,500 | $8.12 | $109.62K | 464,689 | Direct |
| 14 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Acquired M | 13,500 | $8.12 | $109.62K | 464,689 | Direct |
| 14 Aug, 2026 | Fumihide Esaka | Chief Executive Officer | Disposed S | 1,282 | $63.29 | $81.13K | 463,407 | Direct |