13F Pro

SEC Form 4 reporting owner

Chemnitz Gregory R.

Chemnitz Gregory R. has filed 18 Form 4 transactions reported between January 31, 2026 and September 4, 2026, as VP General Counsel & Secretary of MATERION Corp.

Name as filed: Chemnitz Gregory R.

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$1.3M
3 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 4, 2026
transaction date

Roles and reported holdings

  • MTRNMATERION Corp
    Jan 31, 2026 – Sep 4, 2026

    VP General Counsel & Secretary

    Held directly5,930 sh as of Mar 9, 2026 · Form 4

    24 months: $1.3M sold

Transaction history

All 18 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 4, 2026MTRNVP General Counsel & SecretaryGrant or awardCode A · direct2—Form 4
Jun 12, 2026MTRNVP General Counsel & SecretaryGrant or awardCode A · direct2—Form 4
Mar 9, 2026MTRNVP General Counsel & SecretaryShares withheld for tax or exercise priceCode F · direct5$721@ $144.19Form 4
Mar 6, 2026MTRNVP General Counsel & SecretaryGrant or awardCode A · direct4—Form 4
Mar 6, 2026MTRNVP General Counsel & SecretaryGrant or awardCode A · direct5—Form 4
Mar 3, 2026MTRNVP General Counsel & SecretaryOpen-market saleCode S · direct3,434$540K@ $157.26Form 4
Mar 3, 2026MTRNVP General Counsel & SecretaryOpen-market saleCode S · direct1,083$171K@ $157.51Form 4
Mar 3, 2026MTRNVP General Counsel & SecretaryShares withheld for tax or exercise priceCode F · direct4,445$699K@ $157.26Form 4
Mar 3, 2026MTRNVP General Counsel & SecretaryOption exerciseCode M · direct1,017$89K@ $87.36Form 4
Mar 3, 2026MTRNVP General Counsel & SecretaryOption exerciseCode M · direct1,471$199K@ $135.58Form 4
Mar 3, 2026MTRNVP General Counsel & SecretaryOption exerciseCode M · direct3,040$344K@ $113.28Form 4
Mar 2, 2026MTRNVP General Counsel & SecretaryShares withheld for tax or exercise priceCode F · direct1,211$202K@ $166.59Form 4
Mar 1, 2026MTRNVP General Counsel & SecretaryGrant or awardCode A · direct2,265—Form 4
Mar 1, 2026MTRNVP General Counsel & SecretaryGrant or awardCode A · direct1,479—Form 4
Mar 1, 2026MTRNVP General Counsel & SecretaryOption exerciseCode M · direct2,003—Form 4
Feb 17, 2026MTRNVP General Counsel & SecretaryOpen-market saleCode S · direct4,000$628K@ $157.09Form 4
Feb 12, 2026MTRNVP General Counsel & SecretaryGrant or awardCode A · direct2,196—Form 4
Jan 31, 2026MTRNVP General Counsel & SecretaryGrant or awardCode A · direct98—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.