Ambiq Micro, Inc. (AMBQ)
$57.47-$2.75 (-4.58%) Today
Fumihide Esaka - OfficerFumihide Esaka - OfficerAmbiq Micro Inc is a fabless semiconductor company that has developed technology based on a patented Sub-threshold Power Optimized Technology (SPOT) platform that significantly reduces the amount of power consumed by integrated circuits. It is a pioneer and provider of ultra-low power semiconductor solutions designed to address the power consumption challenges of general purpose and AI compute - especially at the edge. The company provides a full-stack solution encompassing tightly integrated hardware and software. Its solutions include a diverse family of systems-on-chip (SoCs) and the software required to enable on-chip AI processing, general compute, sensing, security, storage, wireless connectivity, and developed graphics.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 9 | 75,500 | $4.60M |
| Grant or award | 5 | 24,785 | |
| Option exercise | 12 | 182,904 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
39 Form 4 filings on record, the earliest from Jul 29, 2025, newest first. Filing history page 1 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Scott McLean Hanson - Officer | Option exercise | Common Stock | 27,500 | $8.12 | $223K | |
| Scott McLean Hanson - Officer | Option exercise | Common Stock | 10,000 | $8.12 | $81K | |
| Scott McLean Hanson - Officer | Option exercise | Common Stock | 27,500 | $8.12 | $223K | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 27,500 | $59.58 | $1.64M | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 22,590 | $59.69 | $1.35M | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 4,910 | $60.32 | $296K | |
| Scott McLean Hanson - Officer | Option exercise | Stock Option (Right to Buy) | 10,000 | $0.00 | - | |
| Scott McLean Hanson - Officer | Option exercise | Stock Option (Right to Buy) | 27,500 | $0.00 | - | |
| Scott McLean Hanson - Officer | Option exercise | Stock Option (Right to Buy) | 27,500 | $0.00 | - | |
| Scott McLean Hanson - Officer | Option exercise | Common Stock | 7,000 | $8.12 | $57K | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 800 | $63.26 | $51K | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 5,400 | $64.41 | $348K | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 800 | $65.30 | $52K | |
| Scott McLean Hanson - Officer | Option exercise | Stock Option (Right to Buy) | 7,000 | $0.00 | - | |
| Fumihide Esaka - Officer | Option exercise | Common Stock | 13,500 | $8.12 | $110K | |
| Fumihide Esaka - Officer | Open-market sale | Common Stock | 1,282 | $63.29 | $81K | |
| Fumihide Esaka - Officer | Open-market sale | Common Stock | 10,718 | $64.40 | $690K | |
| Fumihide Esaka - Officer | Open-market sale | Common Stock | 1,500 | $65.26 | $98K | |
| Fumihide Esaka - Officer | Option exercise | Stock Option (Right to Buy) | 13,500 | $0.00 | - | |
 Wen Hsuan Hsieh | Grant or award | Common Stock | 4,957 | $0.00 | - | |
| Timothy Chen | Grant or award | Common Stock | 4,957 | $0.00 | - | |
| Bernard Bennett Banks | Grant or award | Common Stock | 4,957 | $0.00 | - | |
| Joseph A. Tautges | Grant or award | Common Stock | 4,957 | $0.00 | - | |
| Ker Zhang | Grant or award | Common Stock | 4,957 | $0.00 | - | |
| Jeffrey G. Winzeler - Officer | Option exercise | Common Stock | 5,952 | $16.80 | $100K | |
| Jeffrey G. Winzeler - Officer | Option exercise | Stock Option (Right to Buy) | 5,952 | $0.00 | - | |
| Timothy Chen | Open-market sale | Common Stock | 22,414 | $78.85 | $1.77M | |
| Timothy Chen | Open-market sale | Common Stock | 24,248 | $79.72 | $1.93M | |
| Timothy Chen | Open-market sale | Common Stock | 20,666 | $80.61 | $1.67M | |
| Timothy Chen | Open-market sale | Common Stock | 3,264 | $81.57 | $266K | |
| Jeffrey G. Winzeler - Officer | Option exercise | Common Stock | 26,000 | $16.80 | $437K | |
| Jeffrey G. Winzeler - Officer | Open-market sale | Common Stock | 82 | $70.65 | $6K | |
| Jeffrey G. Winzeler - Officer | Option exercise | Common Stock | 5,952 | $16.80 | $100K | |
| Jeffrey G. Winzeler - Officer | Open-market sale | Common Stock | 25,918 | $69.90 | $1.81M | |
| Jeffrey G. Winzeler - Officer | Option exercise | Stock Option (Right to Buy) | 26,000 | $0.00 | - | |
| Jeffrey G. Winzeler - Officer | Option exercise | Stock Option (Right to Buy) | 5,952 | $0.00 | - | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 200 | $70.50 | $14K | |
| Scott McLean Hanson - Officer | Option exercise | Common Stock | 8,100 | $8.12 | $66K | |
| Scott McLean Hanson - Officer | Option exercise | Common Stock | 10,200 | $8.12 | $83K | |
| Scott McLean Hanson - Officer | Option exercise | Stock Option (Right to Buy) | 10,200 | $0.00 | - | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 3,900 | $68.62 | $268K | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 6,100 | $69.59 | $425K | |
| Scott McLean Hanson - Officer | Option exercise | Stock Option (Right to Buy) | 8,100 | $0.00 | - | |
| Sean Chihhsiang Chen - Officer | Option exercise | Common Stock | 55,685 | $5.88 | $327K | |
| Sean Chihhsiang Chen - Officer | Open-market sale | Common Stock | 32,351 | $70.53 | $2.28M | |
| Sean Chihhsiang Chen - Officer | Open-market sale | Common Stock | 23,334 | $71.37 | $1.67M | |
| Sean Chihhsiang Chen - Officer | Option exercise | Stock Option (Right to Buy) | 55,685 | $0.00 | - | |
| Fumihide Esaka - Officer | Option exercise | Common Stock | 60,000 | $8.12 | $487K | |
| Fumihide Esaka - Officer | Option exercise | Common Stock | 45,463 | $8.12 | $369K | |
| Fumihide Esaka - Officer | Option exercise | Common Stock | 14,537 | $12.60 | $183K | |
| Fumihide Esaka - Officer | Open-market sale | Common Stock | 60,000 | $70.02 | $4.20M | |
| Fumihide Esaka - Officer | Option exercise | Stock Option (Right to Buy) | 60,000 | $0.00 | - | |
| Fumihide Esaka - Officer | Option exercise | Stock Option (Right to Buy) | 45,463 | $0.00 | - | |
| Fumihide Esaka - Officer | Option exercise | Stock Option (Right to Buy) | 7,936 | $0.00 | - | |
| Fumihide Esaka - Officer | Option exercise | Stock Option (Right to Buy) | 6,601 | $0.00 | - | |
| Michele Kim Connors - Officer | Open-market sale | Common Stock | 660 | $26.04 | $17K | |
| Michele Kim Connors - Officer | Open-market sale | Common Stock | 151 | $26.65 | $4K | |
| Jeffrey G. Winzeler - Officer | Grant or award | Common Stock | 41,728 | $0.00 | - | |
| Sean Chihhsiang Chen - Officer | Grant or award | Common Stock | 64,246 | $0.00 | - | |
| Scott McLean Hanson - Officer | Grant or award | Common Stock | 80,308 | $0.00 | - | |
| Fumihide Esaka - Officer | Grant or award | Common Stock | 160,616 | $0.00 | - | |
| Michele Kim Connors - Officer | Grant or award | Common Stock | 32,123 | $0.00 | - | |
| Michele Kim Connors - Officer | Grant or award | Common Stock | 32,123 | $0.00 | - | |
| Jeffrey G. Winzeler - Officer | Grant or award | Common Stock | 41,728 | $0.00 | - | |
| Sean Chihhsiang Chen - Officer | Grant or award | Common Stock | 64,246 | $0.00 | - | |
| Scott McLean Hanson - Officer | Grant or award | Common Stock | 80,308 | $0.00 | - | |
| Fumihide Esaka - Officer | Grant or award | Common Stock | 160,616 | $0.00 | - | |
| Wen Hsuan Hsieh | Option exercise | Common Stock | 238,931 | $12.60 | $3.01M | |
| Wen Hsuan Hsieh | Option exercise | Warrant (Right to Buy) | 238,931 | $0.00 | - | |
| Fumihide Esaka - Officer | Option exercise | Common Stock | 53,660 | $5.88 | $316K | |
| Fumihide Esaka - Officer | Option exercise | Stock Option (Right to Buy) | 53,660 | $0.00 | - | |
| Joseph A. Tautges | Open-market sale | Common Stock | 7,800 | $31.00 | $242K | |
| Scott McLean Hanson - Officer | Open-market sale | Common Stock | 10,000 | $31.00 | $310K | |
| Michele Kim Connors - Officer | Grant or award | Common Stock | 23,759 | $0.00 | - | |
| Michele Kim Connors - Officer | Grant or award | Common Stock | 5,483 | $0.00 | - |
A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| SCOTT HANSON | Officer | 27,500 | $1.64M | View on EDGAR | |
| SCOTT HANSON | Officer | 27,500 | $1.64M | View on EDGAR | |
| FUMIHIDE ESAKA | Director, Officer | 45,500 | $2.93M | View on EDGAR |
Ambiq Micro, Inc. (AMBQ) had 9 insider filings in the last 90 days, with the most recent on 2026-08-28. The full record for AMBQ runs to 39 Form 4 filings, the earliest from 2025-07-29. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
No insider purchases of AMBQ were filed in the last 90 days.
9 insider sales of AMBQ were filed in the last 90 days, totaling $4.60M.
This page tracks AMBQ Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
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