Updated Jul 16, 2026
Piontek Gregg has filed 2 SEC Form 4 filings across 1 company in the last 90 days — selling. Lifetime open-market sales: $2.49M.
Gregg Piontek is a corporate executive currently serving as the Senior Vice President and Chief Financial Officer (CFO) of NPK International Inc. His role involves overseeing the financial operations of the company, contributing to strategic planning, and ensuring compliance with financial regulations.
| Role | Senior Vice President and CFO |
|---|---|
| Notability | 20/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-03 | NPKI | NPK International Inc. | M — Option exercise | 40.4K | $0.00 | |
| 2026-06-03 | NPKI | NPK International Inc. | F — Tax withholding / forfeiture | 11.2K | $14.31 | $161K |
| 2026-06-03 | NPKI | NPK International Inc. | F — Tax withholding / forfeiture | 15.9K | $14.31 | $227K |
| 2026-06-03 | NPKI | NPK International Inc. | F — Tax withholding / forfeiture | 9.0K | $14.31 | $128K |
| 2026-05-21 | NPKI | NPK International Inc. | A — Grant or award | 34.6K | $0.00 | |
| 2026-04-10 | NPKI | NPK International Inc. | S — Open-market sale [10b5-1] | 15.0K | $15.04 | $226K |
| 2026-04-03 | NPKI | NPK International Inc. | S — Open-market sale [10b5-1] | 35.0K | $14.51 | $508K |
| 2026-03-26 | NPKI | NPK International Inc. | S — Open-market sale [10b5-1] | 15.0K | $15.03 | $225K |
| 2026-03-05 | NPKI | NPK International Inc. | S — Open-market sale [10b5-1] | 35.0K | $14.02 | $491K |
| 2026-03-05 | NPKI | NPK International Inc. | S — Open-market sale [10b5-1] | 73.6K | $14.10 | $1.04M |
| 2026-03-05 | NPKI | NPK International Inc. | M — Option exercise [10b5-1] | 73.6K | $4.32 | $318K |
Gregg Piontek is a corporate executive currently serving as the Senior Vice President and Chief Financial Officer (CFO) of NPK International Inc. His role involves overseeing the financial operations of the company, contributing to strategic planning, and ensuring compliance with financial regulations.…
2 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 0 open-market purchases () and 5 open-market sales ($2.49M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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