The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 2, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 11K | — | $0 |
| Sep 2, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 10K | $56.77 | $544K |
| Sep 2, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 1K | $56.15 | $82K |
| Sep 2, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 11K | $12.60 | $139K |
| Sep 1, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 49K | — | $0 |
| Sep 1, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 49K | $56.39 | $2.8M |
| Sep 1, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 49K | $12.60 | $617K |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 9K | — | $0 |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 35K | — | $0 |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 14K | — | $0 |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 6K | $58.46 | $327K |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 14K | $57.70 | $796K |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 16K | $56.81 | $886K |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 44K | $12.60 | $558K |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 2K | $58.52 | $123K |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 6K | $57.75 | $318K |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 6K | $56.87 | $335K |
| Aug 31, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 14K | $8.12 | $110K |
| Aug 27, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 28K | — | $0 |
| Aug 27, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 5K | $60.32 | $296K |
| Aug 27, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 23K | $59.69 | $1.3M |
| Aug 27, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 28K | $8.12 | $223K |
| Aug 26, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 28K | — | $0 |
| Aug 26, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 10K | — | $0 |
| Aug 26, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 28K | $59.58 | $1.6M |
| Aug 26, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 28K | $8.12 | $223K |
| Aug 26, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 10K | $8.12 | $81K |
| Aug 14, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 14K | — | $0 |
| Aug 14, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 2K | $65.26 | $98K |
| Aug 14, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 11K | $64.40 | $690K |
| Aug 14, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 1K | $63.29 | $81K |
| Aug 14, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 14K | $8.12 | $110K |
| Aug 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 7K | — | $0 |
| Aug 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 800 | $65.30 | $52K |
| Aug 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 5K | $64.41 | $348K |
| Aug 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 800 | $63.26 | $51K |
| Aug 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 7K | $8.12 | $57K |
| Jun 8, 2026 | Banks Bernard Bennett | Director | Grant(A) | 5K | — | $0 |
| Jun 8, 2026 | Zhang Ker | Director | Grant(A) | 5K | — | $0 |
| Jun 8, 2026 | Chen Timothy | Director | Grant(A) | 5K | — | $0 |
| Jun 8, 2026 | Tautges Joseph A | Director | Grant(A) | 5K | — | $0 |
| Jun 8, 2026 | HSIEH Wen Hsuan | Director | Grant(A) | 5K | — | $0 |
| Jun 2, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Option exercise(M) | 6K | $16.80 | $100K |
| Jun 2, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Option exercise(M) | 6K | — | $0 |
| May 27, 2026 | Chen Timothy | Director | Sell(S) | 22K | $78.85 | $1.8M |
| May 27, 2026 | Chen Timothy | Director | Sell(S) | 24K | $79.72 | $1.9M |
| May 27, 2026 | Chen Timothy | Director | Sell(S) | 21K | $80.61 | $1.7M |
| May 27, 2026 | Chen Timothy | Director | Sell(S) | 3K | $81.57 | $266K |
| May 15, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Option exercise(M) | 6K | $16.80 | $100K |
| May 15, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Option exercise(M) | 6K | — | $0 |
| May 15, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 8K | $8.12 | $66K |
| May 15, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 8K | — | $0 |
| May 15, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 45K | $8.12 | $369K |
| May 15, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 15K | $12.60 | $183K |
| May 15, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 45K | — | $0 |
| May 15, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 8K | — | $0 |
| May 15, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 7K | — | $0 |
| May 15, 2026 | Chen Sean Chihhsiang | President and COO | Option exercise(M) | 56K | $5.88 | $327K |
| May 15, 2026 | Chen Sean Chihhsiang | President and COO | Sell(S) | 32K | $70.53 | $2.3M |
| May 15, 2026 | Chen Sean Chihhsiang | President and COO | Sell(S) | 23K | $71.37 | $1.7M |
| May 15, 2026 | Chen Sean Chihhsiang | President and COO | Option exercise(M) | 56K | — | $0 |
| May 14, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Option exercise(M) | 26K | $16.80 | $437K |
| May 14, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Sell(S) | 26K | $69.90 | $1.8M |
| May 14, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Sell(S) | 82 | $70.65 | $6K |
| May 14, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Option exercise(M) | 26K | — | $0 |
| May 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 10K | $8.12 | $83K |
| May 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 4K | $68.62 | $268K |
| May 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 6K | $69.59 | $425K |
| May 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 200 | $70.50 | $14K |
| May 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Option exercise(M) | 10K | — | $0 |
| May 14, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 60K | $8.12 | $487K |
| May 14, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell(S) | 60K | $70.02 | $4.2M |
| May 14, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 60K | — | $0 |
| Apr 2, 2026 | Connors Michele Kim | General Counsel | Sell(S) | 660 | $26.04 | $17K |
| Apr 2, 2026 | Connors Michele Kim | General Counsel | Sell(S) | 151 | $26.65 | $4K |
| Mar 6, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Grant(A) | 161K | — | $0 |
| Mar 6, 2026 | Chen Sean Chihhsiang | President and COO | Grant(A) | 64K | — | $0 |
| Mar 6, 2026 | Connors Michele Kim | General Counsel | Grant(A) | 32K | — | $0 |
| Mar 6, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Grant(A) | 42K | — | $0 |
| Mar 6, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Grant(A) | 80K | — | $0 |
| Feb 18, 2026 | HSIEH Wen Hsuan | Director | Option exercise(M) | 239K | $12.60 | $3.0M |
| Feb 18, 2026 | HSIEH Wen Hsuan | Director | Option exercise(M) | 239K | — | $0 |
| Jan 26, 2026 | Tautges Joseph A | Director | Sell(S) | 8K | $31.00 | $242K |
| Jan 26, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell(S) | 10K | $31.00 | $310K |
| Jan 5, 2026 | Connors Michele Kim | General Counsel | Grant(A) | 24K | — | $0 |
| Jan 5, 2026 | Connors Michele Kim | General Counsel | Grant(A) | 5K | — | $0 |
| Oct 7, 2025 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 54K | $5.88 | $316K |
| Oct 7, 2025 | Esaka Fumihide | Chief Executive Officer, Director | Option exercise(M) | 54K | — | $0 |
| Oct 2, 2025 | Winzeler Jeffrey G | Chief Financial Officer | Grant(A) | 53K | — | $0 |
| Oct 2, 2025 | Hanson Scott McLean | Chief Financial Officer, Director | Grant(A) | 84K | — | $0 |
| Oct 2, 2025 | Esaka Fumihide | Chief Executive Officer, Director | Grant(A) | 160K | — | $0 |
| Oct 2, 2025 | Chen Sean Chihhsiang | President and COO | Grant(A) | 56K | — | $0 |
| Jul 31, 2025 | HSIEH Wen Hsuan | Director | Conversion(C) | 395K | — | — |
| Jul 31, 2025 | HSIEH Wen Hsuan | Director | Conversion(C) | 395K | — | $0 |
| Jul 31, 2025 | Kleiner Perkins Caufield & Byers XVI, LLC | 10% Owner | Conversion(C) | 195K | — | — |
| Jul 31, 2025 | Kleiner Perkins Caufield & Byers XVI, LLC | 10% Owner | Conversion(C) | 748K | — | — |
| Jul 31, 2025 | Kleiner Perkins Caufield & Byers XVI, LLC | 10% Owner | Conversion(C) | 99K | — | — |
| Jul 31, 2025 | Kleiner Perkins Caufield & Byers XVI, LLC | 10% Owner | Conversion(C) | 23K | — | — |
| Jul 31, 2025 | Kleiner Perkins Caufield & Byers XVI, LLC | 10% Owner | Conversion(C) | 99K | — | $0 |
| Jul 31, 2025 | Kleiner Perkins Caufield & Byers XVI, LLC | 10% Owner | Conversion(C) | 171K | — | $0 |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-04. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for AMBQ