Gregg Piontek
Senior Vice President and CFO · NPK International Inc.
- 2026
- Jun 3, 2026
- 6
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Gregg Piontek files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Matthew Lanigan - $2.42M in NPKI purchases and sales in the last 12 months
- Lori Briggs - $275K in NPKI purchases and sales in the last 12 months
- Mary Celeste Fruge - $163K in NPKI purchases and sales in the last 12 months
- Rose M. Robeson - $135K in NPKI purchases and sales in the last 12 months
- Michael A. Lewis - $112K in NPKI purchases and sales in the last 12 months
- Matthew James Warren - $40K in NPKI purchases and sales in the last 12 months
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Frequently asked questions
Who is Gregg Piontek?
Gregg Piontek is a corporate insider, tracked as Senior Vice President and CFO of NPK International Inc. (NPKI). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Gregg Piontek last file a Form 4?
The most recent primary Form 4 on record is dated 3 June 2026, one of 6 filings going back to 2026.
Has Gregg Piontek been buying or selling stock?
Recorded transactions: 0 open-market purchases and 5 open-market sales ($2.49M) across all tracked filings.
