Summary
Updated Aug 31, 2026
Stephen E. Macadam is Director of Atmus Filtration Technologies Inc. (ATMU). 7 SEC Form 4 filings on record going back to 2024, most recently on 13 August 2026. Most recent open-market trade: bought $100K of ATMU on 13 August 2026. Lifetime open-market purchases: $349K.
Recent Transactions
6Every recent SEC Form 4 transaction Stephen E. Macadam has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Stephen E. Macadam go back to 2024: 7 primary Form 4 filings, an average of 2.3 per year. The typical open-market purchase is $175K (2 buys totaling $349K). The largest single buy on record is $250K of LPX in 2025. 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 Stephen E. Macadam 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.
- Stephanie Disher - $1.16M of ATMU open-market activity in the last 12 months
- STADIUM CAPITAL MANAGEMENT LLC - $695K of SNBR open-market activity in the last 12 months
- Renee Swan - $313K of ATMU open-market activity in the last 12 months
- Jack Kienzler - $232K of ATMU open-market activity in the last 12 months
- Charles Masters - $131K of ATMU open-market activity in the last 12 months
- Gretchen R. Haggerty - $110K of ATMU 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 Stephen E. Macadam?
Stephen E. Macadam is a corporate insider, tracked as Director of Atmus Filtration Technologies Inc. (ATMU). InsiderAlpha holds 7 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 Stephen E. Macadam submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Stephen E. Macadam been buying or selling stock?
Recorded transactions: 2 open-market purchases ($349K) and 0 open-market sales across all tracked filings.
Where can I see all of Stephen E. Macadam'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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