BERG MARK STEPHEN (CIK 1238881) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-19). Recent activity: Buy PUMP (28,181 shares), Buy PUMP (16,454 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-19 | ProPetro Holding Corp. (PUMP) | Director | Buy | 28,181 | $0 |
| 2025-05-09 | ProPetro Holding Corp. (PUMP) | Director | Buy | 16,454 | $0 |
Source: SEC Form 4 filings · as of 2026-05-19