Durham Mark (CIK 2073180) reported 8 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-07-16). Recent activity: Sell GTLS (3,074 shares), Sell GTLS (107 shares), Buy GTLS (689 shares), Sell GTLS (345 shares), Buy GTLS (1,050 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-16 | CHART INDUSTRIES INC (GTLS) | Chief Accounting Officer | Sell | 3,074 | $645,540 |
| 2026-07-14 | CHART INDUSTRIES INC (GTLS) | Chief Accounting Officer | Sell | 107 | $22,456 |
| 2026-04-02 | CHART INDUSTRIES INC (GTLS) | Chief Accounting Officer | Buy | 689 | $0 |
| 2026-04-02 | CHART INDUSTRIES INC (GTLS) | Chief Accounting Officer | Sell | 345 | $71,394 |
| 2026-01-06 | CHART INDUSTRIES INC (GTLS) | Chief Accounting Officer | Buy | 1,050 | $0 |
| 2026-01-06 | CHART INDUSTRIES INC (GTLS) | Chief Accounting Officer | Sell | 66 | $13,611 |
| 2025-11-13 | CHART INDUSTRIES INC (GTLS) | Chief Accounting Officer | Sell | 117 | $23,744 |
| 2025-07-15 | CHART INDUSTRIES INC (GTLS) | Chief Accounting Officer | Buy | 640 | $0 |
Source: SEC Form 4 filings · as of 2026-07-16