Summary
Updated Aug 30, 2026
John C. Minge is Director of NPK International Inc. (NPKI). 1 SEC Form 4 filing on record, dated 21 May 2026.
Recent Transactions
1Every recent SEC Form 4 transaction John C. Minge has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies John C. Minge 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.
- Gregg Piontek - $2.49M of NPKI open-market activity in the last 12 months
- Matthew Lanigan - $2.43M of NPKI open-market activity in the last 12 months
- Lori Briggs - $391K of NPKI open-market activity in the last 12 months
- Mary Celeste Fruge - $163K of NPKI open-market activity in the last 12 months
- Michael A. Lewis - $112K of NPKI open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is John C. Minge?
John C. Minge is a corporate insider, tracked as Director of NPK International Inc. (NPKI). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did John C. Minge last file a Form 4?
The only primary Form 4 on record is dated 21 May 2026.
Where can I see all of John C. Minge's SEC 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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