Summary
Updated Aug 31, 2026
Ernst N. Csiszar is Director of MASTEC INC (MTZ). 8 SEC Form 4 filings on record going back to 2024, most recently on 18 August 2026. Most recent open-market trade: sold $2.41M of MTZ on 5 June 2026. Lifetime open-market sales: $4.37M.
Recent Transactions
14Every recent SEC Form 4 transaction Ernst N. Csiszar has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Ernst N. Csiszar go back to 2024: 8 primary Form 4 filings, an average of 2.7 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 Ernst N. Csiszar 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.
- C. Robert Campbell - $2.24M of MTZ open-market activity in the last 12 months
- Robert E. Apple - $2.00M of MTZ open-market activity in the last 12 months
- Timothy Michael Love - $398K of MTZ open-market activity in the last 12 months
- Javier Alberto Palomarez - $309K of MTZ 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 Ernst N. Csiszar?
Ernst N. Csiszar is a corporate insider, tracked as Director of MASTEC INC (MTZ). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Ernst N. Csiszar submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Ernst N. Csiszar been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($4.37M) across all tracked filings.
Where can I see all of Ernst N. Csiszar'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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