13F Pro

SEC Form 4 reporting owner

Sun Kang

Sun Kang has filed 20 Form 4 transactions reported between November 21, 2025 and August 21, 2026, as Director, Chief Executive Officer of Amprius Technologies, Inc..

Name as filed: Sun Kang

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$46.6M
11 lines
Companies
1
with Form 4 filings
Latest transaction
Aug 21, 2026
transaction date

Roles and reported holdings

  • AMPXAmprius Technologies, Inc.
    Nov 21, 2025 – Aug 21, 2026

    Director, Chief Executive Officer

    Held directly1,218,397 sh as of Aug 21, 2026 · Form 4
    Held indirectly (latest line)56,406 sh as of Mar 23, 2026 · Form 4

    24 months: $46.6M sold

Transaction history

All 20 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Aug 21, 2026AMPXDirectorOpen-market saleCode S · direct62,101$642K@ $10.34Form 4
May 27, 2026AMPXDirectorOpen-market saleCode S · direct356$6K@ $17.19Form 4
May 21, 2026AMPXDirectorOpen-market saleCode S · direct67,796$1.0M@ $14.79Form 4
May 5, 2026AMPXDirectorGrant or awardCode A · direct6,250—Form 4
Apr 1, 2026AMPXDirectorOpen-market saleCode S · direct249,037$4.2M@ $16.78Form 4
Apr 1, 2026AMPXDirectorOpen-market saleCode S · direct1,250,963$19.7M@ $15.73Form 4
Apr 1, 2026AMPXDirectorOption exerciseCode M · direct187,495$690K@ $3.68Form 4
Apr 1, 2026AMPXDirectorOption exerciseCode M · direct1,312,505$2.3M@ $1.78Form 4
Mar 23, 2026AMPXDirectorOpen-market saleCode S · indirect65,046$1.2M@ $19.06Form 4
Mar 23, 2026AMPXDirectorOpen-market saleCode S · indirect152,823$2.9M@ $18.69Form 4
Feb 23, 2026AMPXDirectorOpen-market saleCode S · direct61,251$622K@ $10.16Form 4
Jan 20, 2026AMPXDirectorOption exerciseCode M · direct43,185$77K@ $1.78Form 4
Jan 16, 2026AMPXDirectorOpen-market saleCode S · direct950,548$10.5M@ $11.07Form 4
Jan 16, 2026AMPXDirectorOption exerciseCode M · direct100,210$178K@ $1.78Form 4
Jan 16, 2026AMPXDirectorOption exerciseCode M · direct850,338$2.1M@ $2.50Form 4
Jan 12, 2026AMPXDirectorOpen-market saleCode S · direct506,267$5.1M@ $10.10Form 4
Jan 12, 2026AMPXDirectorOption exerciseCode M · direct117,201$293K@ $2.50Form 4
Jan 12, 2026AMPXDirectorOption exerciseCode M · direct208,264$508K@ $2.44Form 4
Jan 12, 2026AMPXDirectorOption exerciseCode M · direct180,802$112K@ $0.6200Form 4
Nov 21, 2025AMPXChief Executive OfficerOpen-market saleCode S · direct68,655$692K@ $10.08Form 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.