13F Pro

SEC Form 4 reporting owner

Katz Avi S

Katz Avi S has filed 11 Form 4 transactions reported between January 21, 2026 and September 2, 2026, as Chairman, CEO; Chairmain of Hadron Energy, Inc. and Chairman, CHAIRMAN of QT IMAGING HOLDINGS, INC..

Name as filed: Katz Avi S

Open-market buys, 24 mo
$155K
1 lines
Open-market sales, 24 mo
None
reported
Companies
2
with Form 4 filings
Latest transaction
Sep 2, 2026
transaction date

Roles and reported holdings

  • HDRNHadron Energy, Inc.
    Jan 21, 2026 – Sep 2, 2026

    Chairman, CEO; Chairmain

    Held indirectly (latest line)9,932,246 sh as of Jan 21, 2026 · Form 4
  • QTIQT IMAGING HOLDINGS, INC.
    Jan 22, 2026 – Mar 20, 2026

    Chairman, CHAIRMAN

    Held directly48,214 sh as of Jan 22, 2026 · Form 4

    24 months: $155K bought

Transaction history

All 11 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 2, 2026HDRNChairmanGrant or awardCode A · direct707,916$1.3M@ $1.88Form 4
Aug 11, 2026HDRNChairmanGrant or awardCode A · direct67,395$124K@ $1.84Form 4
May 22, 2026HDRNChairmanOther acquisition or dispositionCode J · indirect29,300—Form 4
May 22, 2026HDRNChairmanGrant or awardCode A · indirect9,932,246—Form 4
May 22, 2026HDRNChairmanGrant or awardCode A · direct87,500—Form 4
Apr 16, 2026HDRNCEO; ChairmainGrant or awardCode A · indirect29,300—Form 4
Mar 20, 2026QTIChairmanGrant or awardCode A · direct3,500—Form 4
Jan 30, 2026HDRNCEO; ChairmainGrant or awardCode A · indirect14,800—Form 4
Jan 22, 2026QTICHAIRMANOpen-market purchaseCode P · direct48,214—Form 4
Jan 22, 2026QTICHAIRMANOpen-market purchaseCode P · direct24,107$155K@ $6.43Form 4
Jan 21, 2026HDRNCEO; ChairmainOpen-market saleCode S · indirect175,000—Form 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.