Summary
Updated Aug 31, 2026
Mark Durham is Chief Accounting Officer of CHART INDUSTRIES INC (GTLS). 5 SEC Form 4 filings on record going back to 2025, most recently on 16 July 2026.
Recent Transactions
6Every recent SEC Form 4 transaction Mark Durham has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Mark Durham go back to 2025: 5 primary Form 4 filings, an average of 2.5 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 have reported open-market trades at the same companies as Mark Durham. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Jillian C. Evanko - $50K of GTLS open-market activity on record
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Mark Durham?
Mark Durham is a corporate insider, tracked as Chief Accounting Officer of CHART INDUSTRIES INC (GTLS). InsiderAlpha holds 5 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 Mark Durham submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Where can I see all of Mark Durham'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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