13F Pro

SEC Form 4 reporting owner

Esaka Fumihide

Esaka Fumihide has filed 34 Form 4 transactions reported between October 7, 2025 and September 15, 2026, as Chief Executive Officer of Ambiq Micro, Inc..

Name as filed: Esaka Fumihide

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$8.3M
16 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 15, 2026
transaction date

Roles and reported holdings

  • AMBQAmbiq Micro, Inc.
    Oct 7, 2025 – Sep 15, 2026

    Chief Executive Officer

    Held directly460,460 sh as of Sep 15, 2026 · Form 4

    24 months: $8.3M sold

Transaction history

All 34 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 15, 2026AMBQChief Executive OfficerOpen-market saleCode S · directAlso reported by Hanson Scott McLean100$6K@ $61.00Form 4
Sep 15, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct9,615$582K@ $60.55Form 4
Sep 15, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct3,785$225K@ $59.56Form 4
Sep 15, 2026AMBQChief Executive OfficerOption exerciseCode M · direct13,500$110K@ $8.12Form 4
Sep 11, 2026AMBQChief Executive OfficerOption exerciseCode M · direct30,993—Form 4
Sep 11, 2026AMBQChief Executive OfficerOption exerciseCode M · direct19,007—Form 4
Sep 11, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct7,917$506K@ $63.86Form 4
Sep 11, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct42,083$2.7M@ $63.27Form 4
Sep 11, 2026AMBQChief Executive OfficerOption exerciseCode M · direct50,000$630K@ $12.60Form 4
Sep 2, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct9,575$544K@ $56.77Form 4
Sep 2, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct1,452$82K@ $56.15Form 4
Sep 2, 2026AMBQChief Executive OfficerOption exerciseCode M · direct11,027$139K@ $12.60Form 4
Sep 1, 2026AMBQChief Executive OfficerOption exerciseCode M · direct48,973$617K@ $12.60Form 4
Aug 31, 2026AMBQChief Executive OfficerOption exerciseCode M · direct9,271—Form 4
Aug 31, 2026AMBQChief Executive OfficerOption exerciseCode M · direct35,000—Form 4
Aug 31, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct5,600$327K@ $58.46Form 4
Aug 31, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct13,800$796K@ $57.70Form 4
Aug 31, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct15,600$886K@ $56.81Form 4
Aug 31, 2026AMBQChief Executive OfficerOption exerciseCode M · direct44,271$558K@ $12.60Form 4
Aug 31, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct2,100$123K@ $58.52Form 4
Aug 31, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct5,501$318K@ $57.75Form 4
Aug 31, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct5,899$335K@ $56.87Form 4
Aug 31, 2026AMBQChief Executive OfficerOption exerciseCode M · direct13,500$110K@ $8.12Form 4
Aug 14, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct1,500$98K@ $65.26Form 4
Aug 14, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct10,718$690K@ $64.40Form 4
Aug 14, 2026AMBQChief Executive OfficerOpen-market saleCode S · direct1,282$81K@ $63.29Form 4
Aug 14, 2026AMBQChief Executive OfficerOption exerciseCode M · direct13,500$110K@ $8.12Form 4
May 15, 2026AMBQChief Executive OfficerOption exerciseCode M · direct6,601—Form 4
May 15, 2026AMBQChief Executive OfficerOption exerciseCode M · direct7,936—Form 4
May 15, 2026AMBQChief Executive OfficerOption exerciseCode M · direct14,537$183K@ $12.60Form 4
May 15, 2026AMBQChief Executive OfficerOption exerciseCode M · direct45,463$369K@ $8.12Form 4
May 14, 2026AMBQChief Executive OfficerOption exerciseCode M · direct60,000$487K@ $8.12Form 4
Mar 6, 2026AMBQChief Executive OfficerGrant or awardCode A · direct160,616—Form 4
Oct 7, 2025AMBQChief Executive OfficerOption exerciseCode M · direct53,660$316K@ $5.88Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.