AMBIQ MICRO INC (AMBQ) — insider trading
Information Technology · NYSE
AMBIQ MICRO INC (AMBQ) has 122 reported SEC Form 4 insider transactions in our data, including 55 open-market sales among the most recent 100 (latest 2026-10-05).
Recent Form 4 transactions
Showing the 100 most recent of 122 recorded transactions. See all on SEC EDGAR →
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-05 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 100 | $69.51 | $7.0K | Form 4 |
| 2026-10-05 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 800 | $68.08 | $54.5K | Form 4 |
| 2026-10-05 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 1,797 | $67.29 | $120.9K | Form 4 |
| 2026-10-05 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 5,508 | $66.38 | $365.6K | Form 4 |
| 2026-10-02 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 302 | $71.86 | $21.7K | Form 4 |
| 2026-10-02 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 3,008 | $69.77 | $209.9K | Form 4 |
| 2026-10-02 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 2,492 | $69.11 | $172.2K | Form 4 |
| 2026-10-02 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 862 | $71.86 | $61.9K | Form 4 |
| 2026-10-02 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 8,585 | $69.77 | $599.0K | Form 4 |
| 2026-10-02 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 7,113 | $69.11 | $491.6K | Form 4 |
| 2026-10-02 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 452 | $71.86 | $32.5K | Form 4 |
| 2026-10-02 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 4,500 | $69.77 | $314.0K | Form 4 |
| 2026-10-02 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 3,728 | $69.11 | $257.6K | Form 4 |
| 2026-10-02 | Winzeler Jeffrey G | Officer (Chief Financial Officer) | Open-market sale | 284 | $71.86 | $20.4K | Form 4 |
| 2026-10-02 | Winzeler Jeffrey G | Officer (Chief Financial Officer) | Open-market sale | 2,828 | $69.77 | $197.3K | Form 4 |
| 2026-10-02 | Winzeler Jeffrey G | Officer (Chief Financial Officer) | Open-market sale | 2,343 | $69.11 | $161.9K | Form 4 |
| 2026-09-15 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 7,000 | — | $0 | Form 4 |
| 2026-09-15 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 100 | $61.00 | $6.1K | Form 4 |
| 2026-09-15 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 4,947 | $60.56 | $299.6K | Form 4 |
| 2026-09-15 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 1,953 | $59.53 | $116.3K | Form 4 |
| 2026-09-15 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion | 7,000 | $8.12 | $56.8K | Form 4 |
| 2026-09-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 13,500 | — | $0 | Form 4 |
| 2026-09-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 100 | $61.00 | $6.1K | Form 4 |
| 2026-09-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 9,615 | $60.55 | $582.2K | Form 4 |
| 2026-09-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 3,785 | $59.56 | $225.4K | Form 4 |
| 2026-09-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 13,500 | $8.12 | $109.6K | Form 4 |
| 2026-09-14 | Chen Sean Chihhsiang | Officer (President and COO) | Option exercise / conversion (derivative) | 15,000 | — | $0 | Form 4 |
| 2026-09-14 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 1,400 | $60.83 | $85.2K | Form 4 |
| 2026-09-14 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 11,000 | $60.24 | $662.6K | Form 4 |
| 2026-09-14 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 2,600 | $59.36 | $154.3K | Form 4 |
| 2026-09-14 | Chen Sean Chihhsiang | Officer (President and COO) | Option exercise / conversion | 15,000 | $8.12 | $121.8K | Form 4 |
| 2026-09-11 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 30,993 | — | $0 | Form 4 |
| 2026-09-11 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 19,007 | — | $0 | Form 4 |
| 2026-09-11 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 7,917 | $63.86 | $505.6K | Form 4 |
| 2026-09-11 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 42,083 | $63.27 | $2.66M | Form 4 |
| 2026-09-11 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 50,000 | $12.60 | $630.0K | Form 4 |
| 2026-09-11 | ZHANG KER | Director | Open-market sale | 900 | $63.95 | $57.6K | Form 4 |
| 2026-09-11 | ZHANG KER | Director | Open-market sale | 9,100 | $63.39 | $576.8K | Form 4 |
| 2026-09-04 | Chen Sean Chihhsiang | Officer (President and COO) | Option exercise / conversion (derivative) | 15,000 | — | $0 | Form 4 |
| 2026-09-04 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 2,126 | $57.68 | $122.6K | Form 4 |
| 2026-09-04 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 12,874 | $57.09 | $734.9K | Form 4 |
| 2026-09-04 | Chen Sean Chihhsiang | Officer (President and COO) | Option exercise / conversion | 15,000 | $8.12 | $121.8K | Form 4 |
| 2026-09-04 | ZHANG KER | Director | Option exercise / conversion (derivative) | 1,785 | — | $0 | Form 4 |
| 2026-09-04 | ZHANG KER | Director | Open-market sale | 185 | $56.92 | $10.5K | Form 4 |
| 2026-09-04 | ZHANG KER | Director | Option exercise / conversion | 1,785 | $5.88 | $10.5K | Form 4 |
| 2026-09-02 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 11,027 | — | $0 | Form 4 |
| 2026-09-02 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 9,575 | $56.77 | $543.6K | Form 4 |
| 2026-09-02 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 1,452 | $56.15 | $81.5K | Form 4 |
| 2026-09-02 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 11,027 | $12.60 | $138.9K | Form 4 |
| 2026-09-01 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 48,973 | — | $0 | Form 4 |
| 2026-09-01 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 48,973 | $56.39 | $2.76M | Form 4 |
| 2026-09-01 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 48,973 | $12.60 | $617.1K | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 9,271 | — | $0 | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 35,000 | — | $0 | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 13,500 | — | $0 | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 5,600 | $58.46 | $327.4K | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 13,800 | $57.70 | $796.3K | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 15,600 | $56.81 | $886.2K | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 44,271 | $12.60 | $557.8K | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 2,100 | $58.52 | $122.9K | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 5,501 | $57.75 | $317.7K | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 5,899 | $56.87 | $335.5K | Form 4 |
| 2026-08-31 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 13,500 | $8.12 | $109.6K | Form 4 |
| 2026-08-27 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 27,500 | — | $0 | Form 4 |
| 2026-08-27 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 4,910 | $60.32 | $296.2K | Form 4 |
| 2026-08-27 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 22,590 | $59.69 | $1.35M | Form 4 |
| 2026-08-27 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion | 27,500 | $8.12 | $223.3K | Form 4 |
| 2026-08-26 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 27,500 | — | $0 | Form 4 |
| 2026-08-26 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 10,000 | — | $0 | Form 4 |
| 2026-08-26 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 27,500 | $59.58 | $1.64M | Form 4 |
| 2026-08-26 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion | 27,500 | $8.12 | $223.3K | Form 4 |
| 2026-08-26 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion | 10,000 | $8.12 | $81.2K | Form 4 |
| 2026-08-14 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 13,500 | — | $0 | Form 4 |
| 2026-08-14 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 1,500 | $65.26 | $97.9K | Form 4 |
| 2026-08-14 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 10,718 | $64.40 | $690.2K | Form 4 |
| 2026-08-14 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Open-market sale | 1,282 | $63.29 | $81.1K | Form 4 |
| 2026-08-14 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 13,500 | $8.12 | $109.6K | Form 4 |
| 2026-08-14 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 7,000 | — | $0 | Form 4 |
| 2026-08-14 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 800 | $65.30 | $52.2K | Form 4 |
| 2026-08-14 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 5,400 | $64.41 | $347.8K | Form 4 |
| 2026-08-14 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Open-market sale | 800 | $63.26 | $50.6K | Form 4 |
| 2026-08-14 | Hanson Scott McLean | Director, Officer (Chief Technology Officer) | Option exercise / conversion | 7,000 | $8.12 | $56.8K | Form 4 |
| 2026-06-08 | ZHANG KER | Director | Grant / award / vesting | 4,957 | — | $0 | Form 4 |
| 2026-06-08 | TAUTGES JOSEPH A | Director | Grant / award / vesting | 4,957 | — | $0 | Form 4 |
| 2026-06-08 | Banks Bernard Bennett | Director | Grant / award / vesting | 4,957 | — | $0 | Form 4 |
| 2026-06-08 | Chen Timothy | Director | Grant / award / vesting | 4,957 | — | $0 | Form 4 |
| 2026-06-08 | HSIEH Wen Hsuan | Director | Grant / award / vesting | 4,957 | — | $0 | Form 4 |
| 2026-06-02 | Winzeler Jeffrey G | Officer (Chief Financial Officer) | Option exercise / conversion (derivative) | 5,952 | — | $0 | Form 4 |
| 2026-06-02 | Winzeler Jeffrey G | Officer (Chief Financial Officer) | Option exercise / conversion | 5,952 | $16.80 | $100.0K | Form 4 |
| 2026-05-27 | Chen Timothy | Director | Open-market sale | 3,264 | $81.57 | $266.2K | Form 4 |
| 2026-05-27 | Chen Timothy | Director | Open-market sale | 20,666 | $80.61 | $1.67M | Form 4 |
| 2026-05-27 | Chen Timothy | Director | Open-market sale | 24,248 | $79.72 | $1.93M | Form 4 |
| 2026-05-27 | Chen Timothy | Director | Open-market sale | 22,414 | $78.85 | $1.77M | Form 4 |
| 2026-05-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 6,601 | — | $0 | Form 4 |
| 2026-05-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 7,936 | — | $0 | Form 4 |
| 2026-05-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion (derivative) | 45,463 | — | $0 | Form 4 |
| 2026-05-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 14,537 | $12.60 | $183.2K | Form 4 |
| 2026-05-15 | Esaka Fumihide | Director, Officer (Chief Executive Officer) | Option exercise / conversion | 45,463 | $8.12 | $369.2K | Form 4 |
| 2026-05-15 | Chen Sean Chihhsiang | Officer (President and COO) | Option exercise / conversion (derivative) | 55,685 | — | $0 | Form 4 |
| 2026-05-15 | Chen Sean Chihhsiang | Officer (President and COO) | Open-market sale | 23,334 | $71.37 | $1.67M | Form 4 |
Ask the chat about AMBQ's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: AMBIQ MICRO INC (AMBQ).
Last updated 2026-10-05 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.