Insiders who have reported open-market trades at the same companies as Michael J. Petro. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Laree E. Perez - $637K in MLM purchases and sales on record
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Michael J. Petro is a corporate insider, tracked as SVP and CFO of MARTIN MARIETTA MATERIALS INC (MLM). 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 Michael J. Petro submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Michael J. Petro is SVP and CFO of MARTIN MARIETTA MATERIALS INC (MLM). 8 SEC Form 4 filings on record going back to 2024, most recently on 2 September 2026.
Recent transactions
10
The latest 10 SEC Form 4 transactions reported by Michael J. Petro.
InsiderAlpha's records for Michael J. Petro go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
