AMBQ insider transaction filings
Ambiq Micro, Inc. — 47 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-09-17. Screen AMBQ transaction legs live →
Insider transaction summary — last 90 days
2026-06-24 to 2026-09-22, from the filings listed below: 10 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 34 legs across 10 filings by 4 insiders — 294,685 shares, $17,583,719 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 32.
- Largest priced transaction: sale of 48,973 shares @ $56.39 ($2,761,534) by Esaka Fumihide, filed 2026-09-02.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| Esaka Fumihide — Chief Executive Officer, Director | 3 | — | 17 legs · 185,500 sh · $11,023,480 | 16 |
| Hanson Scott McLean — Chief Technology Officer, Director | 3 | — | 9 legs · 69,000 sh · $4,155,660 | 10 |
| Chen Sean Chihhsiang — President and COO | 2 | — | 5 legs · 30,000 sh · $1,759,688 | 4 |
| ZHANG KER — Director | 2 | — | 3 legs · 10,185 sh · $644,891 | 2 |
Recent Form 4 filings — Ambiq Micro, Inc.
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-17 | 4 | Hanson Scott McLean — Chief Technology Officer, Director | Option exercise (M): 7,000 @ $8.12 · Sale (S): 1,953 @ $59.53 · Sale (S): 4,947 @ $60.56 · Sale (S): 100 @ $61 · Option exercise (M): 7,000 (derivative) @ $0 | EDGAR |
| 2026-09-15 | 4 | Esaka Fumihide — Chief Executive Officer, Director | Option exercise (M): 50,000 @ $12.60 · Sale (S): 42,083 @ $63.27 · Sale (S): 7,917 @ $63.86 · Option exercise (M): 13,500 @ $8.12 · Sale (S): 3,785 @ $59.56 · Sale (S): 9,615 @ $60.55 · +4 more | EDGAR |
| 2026-09-15 | 4 | Chen Sean Chihhsiang — President and COO | Option exercise (M): 15,000 @ $8.12 · Sale (S): 2,600 @ $59.36 · Sale (S): 11,000 @ $60.24 · Sale (S): 1,400 @ $60.83 · Option exercise (M): 15,000 (derivative) @ $0 | EDGAR |
| 2026-09-15 | 4 | ZHANG KER — Director | Sale (S): 9,100 @ $63.39 · Sale (S): 900 @ $63.95 | EDGAR |
| 2026-09-09 | 4 | ZHANG KER — Director | Option exercise (M): 1,785 @ $5.88 · Sale (S): 185 @ $56.92 · Option exercise (M): 1,785 (derivative) @ $0 | EDGAR |
| 2026-09-09 | 4 | Chen Sean Chihhsiang — President and COO | Option exercise (M): 15,000 @ $8.12 · Sale (S): 12,874 @ $57.09 · Sale (S): 2,126 @ $57.68 · Option exercise (M): 15,000 (derivative) @ $0 | EDGAR |
| 2026-09-02 | 4 | Esaka Fumihide — Chief Executive Officer, Director | Option exercise (M): 13,500 @ $8.12 · Sale (S): 5,899 @ $56.87 · Sale (S): 5,501 @ $57.75 · Sale (S): 2,100 @ $58.52 · Option exercise (M): 44,271 @ $12.60 · Sale (S): 15,600 @ $56.81 · +12 more | EDGAR |
| 2026-08-28 | 4 | Hanson Scott McLean — Chief Technology Officer, Director | Option exercise (M): 10,000 @ $8.12 · Option exercise (M): 27,500 @ $8.12 · Sale (S): 27,500 @ $59.58 · Option exercise (M): 27,500 @ $8.12 · Sale (S): 22,590 @ $59.69 · Sale (S): 4,910 @ $60.32 · +3 more | EDGAR |
| 2026-08-18 | 4 | Hanson Scott McLean — Chief Technology Officer, Director | Option exercise (M): 7,000 @ $8.12 · Sale (S): 800 @ $63.26 · Sale (S): 5,400 @ $64.41 · Sale (S): 800 @ $65.30 · Option exercise (M): 7,000 (derivative) @ $0 | EDGAR |
| 2026-08-18 | 4 | Esaka Fumihide — Chief Executive Officer, Director | Option exercise (M): 13,500 @ $8.12 · Sale (S): 1,282 @ $63.29 · Sale (S): 10,718 @ $64.40 · Sale (S): 1,500 @ $65.26 · Option exercise (M): 13,500 (derivative) @ $0 | EDGAR |
| 2026-06-10 | 4 | Banks Bernard Bennett — Director | Grant/award (A): 4,957 @ $0 | EDGAR |
| 2026-06-10 | 4 | HSIEH Wen Hsuan — Director | Grant/award (A): 4,957 @ $0 | EDGAR |
| 2026-06-10 | 4 | Chen Timothy — Director | Grant/award (A): 4,957 @ $0 | EDGAR |
| 2026-06-10 | 4 | TAUTGES JOSEPH A — Director | Grant/award (A): 4,957 @ $0 | EDGAR |
| 2026-06-10 | 4 | ZHANG KER — Director | Grant/award (A): 4,957 @ $0 | EDGAR |
| 2026-06-04 | 4 | Winzeler Jeffrey G — Chief Financial Officer | Option exercise (M): 5,952 @ $16.80 · Option exercise (M): 5,952 (derivative) @ $0 | EDGAR |
| 2026-05-29 | 4 | Chen Timothy — Director | Sale (S): 22,414 @ $78.85 · Sale (S): 24,248 @ $79.72 · Sale (S): 20,666 @ $80.61 · Sale (S): 3,264 @ $81.57 | EDGAR |
| 2026-05-29 | 4/A | Chen Timothy — Director | Conversion (C): 70,592 · Conversion (C): 1,707,853 (derivative) @ $0 | EDGAR |
| 2026-05-18 | 4 | Chen Sean Chihhsiang — President and COO | Option exercise (M): 55,685 @ $5.88 · Sale (S): 32,351 @ $70.53 · Sale (S): 23,334 @ $71.37 · Option exercise (M): 55,685 (derivative) @ $0 | EDGAR |
| 2026-05-18 | 4 | Esaka Fumihide — Chief Executive Officer, Director | Option exercise (M): 60,000 @ $8.12 · Sale (S): 60,000 @ $70.02 · Option exercise (M): 45,463 @ $8.12 · Option exercise (M): 14,537 @ $12.60 · Option exercise (M): 60,000 (derivative) @ $0 · Option exercise (M): 45,463 (derivative) @ $0 · +2 more | EDGAR |
| 2026-05-18 | 4 | Hanson Scott McLean — Chief Technology Officer, Director | Option exercise (M): 10,200 @ $8.12 · Sale (S): 3,900 @ $68.62 · Sale (S): 6,100 @ $69.59 · Sale (S): 200 @ $70.50 · Option exercise (M): 8,100 @ $8.12 · Option exercise (M): 10,200 (derivative) @ $0 · +1 more | EDGAR |
| 2026-05-18 | 4 | Winzeler Jeffrey G — Chief Financial Officer | Option exercise (M): 26,000 @ $16.80 · Sale (S): 25,918 @ $69.90 · Sale (S): 82 @ $70.65 · Option exercise (M): 5,952 @ $16.80 · Option exercise (M): 26,000 (derivative) @ $0 · Option exercise (M): 5,952 (derivative) @ $0 | EDGAR |
| 2026-04-06 | 4 | Connors Michele Kim — General Counsel | Sale (S): 660 @ $26.04 · Sale (S): 151 @ $26.65 | EDGAR |
| 2026-04-02 | 4/A | Connors Michele Kim — General Counsel | Grant/award (A): 32,123 @ $0 | EDGAR |
| 2026-04-02 | 4/A | Chen Sean Chihhsiang — President and COO | Grant/award (A): 64,246 @ $0 | EDGAR |
| 2026-04-02 | 4/A | Esaka Fumihide — Chief Executive Officer, Director | Grant/award (A): 160,616 @ $0 | EDGAR |
| 2026-04-02 | 4/A | Hanson Scott McLean — Chief Technology Officer, Director | Grant/award (A): 80,308 @ $0 | EDGAR |
| 2026-04-02 | 4/A | Winzeler Jeffrey G — Chief Financial Officer | Grant/award (A): 41,728 @ $0 | EDGAR |
| 2026-03-10 | 4 | Connors Michele Kim — General Counsel | Grant/award (A): 32,123 @ $0 | EDGAR |
| 2026-03-10 | 4 | Chen Sean Chihhsiang — President and COO | Grant/award (A): 64,246 @ $0 | EDGAR |
| 2026-03-10 | 4 | Esaka Fumihide — Chief Executive Officer, Director | Grant/award (A): 160,616 @ $0 | EDGAR |
| 2026-03-10 | 4 | Hanson Scott McLean — Chief Technology Officer, Director | Grant/award (A): 80,308 @ $0 | EDGAR |
| 2026-03-10 | 4 | Winzeler Jeffrey G — Chief Financial Officer | Grant/award (A): 41,728 @ $0 | EDGAR |
| 2026-02-20 | 4 | HSIEH Wen Hsuan — Director | Option exercise (M): 238,931 @ $12.60 · Option exercise (M): 238,931 (derivative) @ $0 | EDGAR |
| 2026-02-10 | 4 | Esaka Fumihide — Chief Executive Officer, Director | Option exercise (M): 53,660 @ $5.88 · Option exercise (M): 53,660 (derivative) @ $0 | EDGAR |
| 2026-01-28 | 4 | Hanson Scott McLean — Chief Technology Officer, Director | Sale (S): 10,000 @ $31 | EDGAR |
| 2026-01-28 | 4 | TAUTGES JOSEPH A — Director | Sale (S): 7,800 @ $31 | EDGAR |
| 2026-01-07 | 4 | Connors Michele Kim — General Counsel | Grant/award (A): 23,759 @ $0 · Grant/award (A): 5,483 @ $0 | EDGAR |
| 2025-10-06 | 4 | Hanson Scott McLean — Chief Financial Officer, Director | Grant/award (A): 83,819 @ $0 | EDGAR |
| 2025-10-06 | 4 | Chen Sean Chihhsiang — President and COO | Grant/award (A): 56,029 @ $0 | EDGAR |
| 2025-10-06 | 4 | Esaka Fumihide — Chief Executive Officer, Director | Grant/award (A): 159,907 @ $0 | EDGAR |
| 2025-10-06 | 4 | Winzeler Jeffrey G — Chief Financial Officer | Grant/award (A): 52,667 @ $0 | EDGAR |
| 2025-07-31 | 4 | KPCB XVI Associates, LLC — 10% owner Kleiner Perkins Caufield & Byers XVI, LLC — 10% owner | Conversion (C): 748,046 · Conversion (C): 98,958 · Conversion (C): 23,294 · Conversion (C): 194,618 · Conversion (C): 748,046 (derivative) @ $0 · Conversion (C): 98,958 (derivative) @ $0 · +2 more | EDGAR |
| 2025-07-31 | 4 | HSIEH Wen Hsuan — Director | Conversion (C): 394,989 · Conversion (C): 394,989 (derivative) @ $0 | EDGAR |
| 2025-07-31 | 4 | Chen Timothy — Director | Grant/award (A): 47,618 @ $0 | EDGAR |
| 2025-07-31 | 4 | TAUTGES JOSEPH A — Director | Grant/award (A): 56,546 @ $0 | EDGAR |
| 2025-07-31 | 4 | ZHANG KER — Director | Grant/award (A): 23,809 @ $0 | EDGAR |
Recent 8-K events — Ambiq Micro, Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-08-11 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-07-30 | 8-K | 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-08 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-05-12 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-05 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-01-21 | 8-K | 2.02 — Results of Operations and Financial Condition | EDGAR |
| 2026-01-08 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers | EDGAR |
| 2025-11-06 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-10-03 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers | EDGAR |
| 2025-09-04 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
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