AMBQ's three largest insider shareholders as of August 04, 2026 are Xvi Associates, Llc Kpcb (TenPercentOwner, 2.66Mn shares), Wen Hsuan Hsieh (Director, 633.92K shares), Fumihide Esaka (Chief Executive Officer, 391.19K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Xvi Associates, Llc Kpcb | TenPercentOwner | 0 | 2,661,028 | 2,661,028 | 62.1% | 31 Jul, 2025 |
| 2 | Wen Hsuan Hsieh | Director | 0 | 633,920 | 633,920 | 14.8% | 20 Feb, 2026 |
| 3 | Fumihide Esaka | Chief Executive Officer | 391,189 | 0 | 391,189 | 9.1% | 02 Apr, 2026 |
| 4 | Scott Mclean Hanson | Chief Technology Officer | 203,126 | 0 | 203,126 | 4.7% | 02 Apr, 2026 |
| 5 | Sean Chihhsiang Chen | President And Coo | 120,275 | 0 | 120,275 | 2.8% | 02 Apr, 2026 |
| 6 | Jeffrey G Winzeler | Chief Financial Officer | 94,395 | 0 | 94,395 | 2.2% | 02 Apr, 2026 |
| 7 | Michele Kim Connors | General Counsel | 60,554 | 0 | 60,554 | 1.4% | 06 Apr, 2026 |
| 8 | Joseph A Tautges | Director | 48,746 | 0 | 48,746 | 1.1% | 28 Jan, 2026 |
| 9 | Timothy Chen | Director | 47,618 | 0 | 47,618 | 1.1% | 31 Jul, 2025 |
| 10 | Ker Zhang | Director | 23,809 | 0 | 23,809 | 0.6% | 31 Jul, 2025 |
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 |
|---|---|---|---|---|---|---|---|---|
| 02 Apr, 2026 | Michele Kim Connors | General Counsel | Disposed S | 660 | $26.04 | $17.19K | 60,705 | Direct |
| 02 Apr, 2026 | Michele Kim Connors | General Counsel | Disposed S | 660 | $26.04 | $17.19K | 60,705 | Direct |
| 02 Apr, 2026 | Michele Kim Connors | General Counsel | Disposed S | 660 | $26.04 | $17.19K | 60,705 | Direct |
| 02 Apr, 2026 | Michele Kim Connors | General Counsel | Disposed S | 151 | $26.65 | $4.02K | 60,554 | Direct |
| 02 Apr, 2026 | Michele Kim Connors | General Counsel | Disposed S | 151 | $26.65 | $4.02K | 60,554 | Direct |
| 02 Apr, 2026 | Michele Kim Connors | General Counsel | Disposed S | 151 | $26.65 | $4.02K | 60,554 | Direct |
| 06 Mar, 2026 | Sean Chihhsiang Chen | President And Coo | Acquired A | 64,246 | $0.00 | $0 | 120,275 | Direct |
| 06 Mar, 2026 | Michele Kim Connors | General Counsel | Acquired A | 32,123 | $0.00 | $0 | 61,365 | Direct |
| 06 Mar, 2026 | Fumihide Esaka | Chief Executive Officer | Acquired A | 160,616 | $0.00 | $0 | 391,189 | Direct |
| 06 Mar, 2026 | Michele Kim Connors | General Counsel | Acquired A | 32,123 | $0.00 | $0 | 61,365 | Direct |
| 06 Mar, 2026 | Michele Kim Connors | General Counsel | Acquired A | 32,123 | $0.00 | $0 | 61,365 | Direct |
| 06 Mar, 2026 | Fumihide Esaka | Chief Executive Officer | Acquired A | 160,616 | $0.00 | $0 | 391,189 | Direct |
| 06 Mar, 2026 | Scott Mclean Hanson | Chief Technology Officer | Acquired A | 80,308 | $0.00 | $0 | 203,126 | Direct |
| 06 Mar, 2026 | Scott Mclean Hanson | Chief Technology Officer | Acquired A | 80,308 | $0.00 | $0 | 203,126 | Direct |
| 06 Mar, 2026 | Scott Mclean Hanson | Chief Technology Officer | Acquired A | 80,308 | $0.00 | $0 | 203,126 | Direct |
| 06 Mar, 2026 | Jeffrey G Winzeler | Chief Financial Officer | Acquired A | 41,728 | $0.00 | $0 | 94,395 | Direct |
| 06 Mar, 2026 | Jeffrey G Winzeler | Chief Financial Officer | Acquired A | 41,728 | $0.00 | $0 | 94,395 | Direct |
| 06 Mar, 2026 | Sean Chihhsiang Chen | President And Coo | Acquired A | 64,246 | $0.00 | $0 | 120,275 | Direct |
| 06 Mar, 2026 | Fumihide Esaka | Chief Executive Officer | Acquired A | 160,616 | $0.00 | $0 | 391,189 | Direct |
| 06 Mar, 2026 | Sean Chihhsiang Chen | President And Coo | Acquired A | 64,246 | $0.00 | $0 | 120,275 | Direct |