Summary
Updated Aug 31, 2026
John Roderick Mackenzie Jr. is VP-SALES of NATIONAL PRESTO INDUSTRIES INC (NPK). 1 SEC Form 4 filing on record, dated 16 March 2026.
Recent Transactions
1Every recent SEC Form 4 transaction John Roderick Mackenzie Jr. has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John Roderick Mackenzie Jr. go back to 2026: 1 primary Form 4 filing, an average of 1.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies John Roderick Mackenzie Jr. 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.
- Randy F. Lieble - $348K of NPK open-market activity in the last 12 months
- David J. Peuse - $70K of NPK 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 Roderick Mackenzie Jr.?
John Roderick Mackenzie Jr. is a corporate insider, tracked as VP-SALES of NATIONAL PRESTO INDUSTRIES INC (NPK). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did John Roderick Mackenzie Jr. last file a Form 4?
The only primary Form 4 on record is dated 16 March 2026.
Where can I see all of John Roderick Mackenzie Jr.'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.
Learn More
Follow John Roderick Mackenzie Jr. and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial