Matthew Lanigan
President & CEO, Director · NPK International Inc.
- 2025
- Jun 5, 2026
- 6
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Matthew Lanigan 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 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 Matthew Lanigan?
Matthew Lanigan is a corporate insider, tracked as President & CEO, Director of NPK International Inc. (NPKI). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Matthew Lanigan last file a Form 4?
The most recent primary Form 4 on record is dated 5 June 2026, one of 6 filings going back to 2025.
Has Matthew Lanigan been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($3.14M) across all tracked filings.
