Michael A. Lewis
Director · NPK International Inc.
IndividualSelling only6 10b5-1 trades
- 2025
- Aug 19, 2026
- 9
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Michael A. Lewis 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
- Matthew Lanigan - $2.42M in NPKI purchases and sales in the last 12 months
- Joseph R. Trpik Jr. - $368K in POR purchases and sales in the last 12 months
- Lori Briggs - $275K in NPKI purchases and sales in the last 12 months
- Benjamin Felton - $266K in POR purchases and sales in the last 12 months
- Maria Angelica Espinosa - $210K in POR purchases and sales in the last 12 months
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Frequently asked questions
Who is Michael A. Lewis?
Michael A. Lewis is a corporate insider, tracked as Director of NPK International Inc. (NPKI). InsiderAlpha holds 9 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Michael A. Lewis submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Michael A. Lewis been buying or selling stock?
Recorded transactions: 0 open-market purchases and 7 open-market sales ($291K) across all tracked filings.
