SEC Form 4 reporting owner

Piontek Gregg

Piontek Gregg has filed 10 Form 4 transactions reported between March 4, 2026 and June 1, 2026, as Senior Vice President and CFO of NPK International Inc..

Name as filed: Piontek Gregg

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$1.4M

4 lines

Companies

with Form 4 filings

Latest transaction

Jun 1, 2026

transaction date

Roles and reported holdings

NPKINPK International Inc.
Mar 4, 2026 – Jun 1, 2026
Senior Vice President and CFO
Held directly817,803 sh as of Jun 1, 2026 · Form 4
24 months: $1.4M sold

Transaction history

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

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Jun 1, 2026	NPKISenior Vice President and CFO	Option exerciseCode M · direct	40,379	—	—	858,182	Form 4
Jun 1, 2026	NPKISenior Vice President and CFO	Shares withheld for tax or exercise priceCode F · direct	11,241	$14.31	$161K@ $14.31	817,803	Form 4
Jun 1, 2026	NPKISenior Vice President and CFO	Shares withheld for tax or exercise priceCode F · direct	15,889	$14.31	$227K@ $14.31	829,044	Form 4
Jun 1, 2026	NPKISenior Vice President and CFO	Shares withheld for tax or exercise priceCode F · direct	8,959	$14.31	$128K@ $14.31	844,933	Form 4
May 19, 2026	NPKISenior Vice President and CFO	Grant or awardCode A · direct	34,566	—	—	853,892	Form 4
Apr 9, 2026	NPKISenior Vice President and CFO	Open-market saleCode S · direct	15,000	$15.04	$226K@ $15.04	819,326	Form 4
Apr 1, 2026	NPKISenior Vice President and CFO	Open-market saleCode S · direct	35,000	$14.51	$508K@ $14.51	834,326	Form 4
Mar 25, 2026	NPKISenior Vice President and CFO	Open-market saleCode S · direct	15,000	$15.03	$225K@ $15.03	869,326	Form 4
Mar 4, 2026	NPKISenior Vice President and CFO	Open-market saleCode S · direct	35,000	$14.02	$491K@ $14.02	884,326	Form 4
Mar 4, 2026	NPKISenior Vice President and CFO	Option exerciseCode M · direct	73,590	$4.32	$318K@ $4.32	992,916	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.