Durham Mark — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

Durham Mark has filed 1 SEC Form 4 filing across 1 company in the last 90 days.

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2026-07-14GTLSCHART INDUSTRIES INCF — Tax withholding / forfeiture107$209.87$22K
2026-04-02GTLSCHART INDUSTRIES INCF — Tax withholding / forfeiture345$206.94$71K
2026-04-02GTLSCHART INDUSTRIES INCA — Grant or award689$0.00
2025-07-11GTLSCHART INDUSTRIES INCA — Grant or award640$0.00

Companies — Last 90 Days

Frequently Asked Questions

Who is Durham Mark?

Durham Mark is a corporate insider — currently tracked as Chief Accounting Officer of CHART INDUSTRIES INC (GTLS). InsiderAlpha tracks every SEC Form 4 filing in real time.

How many SEC Form 4 filings has Durham Mark submitted recently?

1 primary Form 4 filings in the last 90 days, covering 1 company.

Where can I see all of Durham Mark'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

Open the live Durham Mark profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.