SEC Form 4 reporting owner

St Dennis Thomas

St Dennis Thomas has filed 10 Form 4 transactions reported between February 10, 2026 and June 16, 2026, as Director of FORMFACTOR INC, a reporting owner of AXCELIS TECHNOLOGIES INC and a reporting owner of VEECO INSTRUMENTS INC.

Name as filed: St Dennis Thomas

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$1.5M
6 lines
Companies
3
with Form 4 filings
Latest transaction
Jun 16, 2026
transaction date

Roles and reported holdings

  • FORMFORMFACTOR INC
    Feb 10, 2026 – Jun 16, 2026

    Director

    Held directly28,333 sh as of Jun 16, 2026 · Form 4

    24 months: $1.2M sold

  • ACLSAXCELIS TECHNOLOGIES INC
    May 15, 2026 – May 22, 2026

    Reporting owner

    Held directly17,695 sh as of May 22, 2026 · Form 4

    24 months: $140K sold

  • VECOVEECO INSTRUMENTS INC
    May 8, 2026 – May 11, 2026

    Reporting owner

    Held directly61,697 sh as of May 11, 2026 · Form 4

    24 months: $87K sold

Transaction history

All 10 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Jun 16, 2026FORMDirectorGiftCode G · direct740—Form 4
Jun 15, 2026FORMDirectorOpen-market saleCode S · direct2,800$424K@ $151.49Form 4
May 22, 2026ACLSOpen-market saleCode S · direct900$140K@ $155.37Form 4
May 19, 2026FORMDirectorOpen-market saleCode S · direct1,000$116K@ $115.84Form 4
May 15, 2026ACLSGrant or awardCode A · direct1,440—Form 4
May 15, 2026FORMDirectorGrant or awardCode A · direct1,347—Form 4
May 11, 2026VECOOpen-market saleCode S · direct1,400$87K@ $61.93Form 4
May 8, 2026VECOGrant or awardCode A · direct2,945—Form 4
Feb 10, 2026FORMDirectorOpen-market saleCode S · direct1,830$172K@ $94.24Form 4
Feb 10, 2026FORMDirectorOpen-market saleCode S · direct5,601$525K@ $93.71Form 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.