| Date | Owner | Type | Security | Price | Units | Value | |
|---|---|---|---|---|---|---|---|
| Brasher James E. Sr. VP & General Counsel | S | Common Stock | |||||
| Skerl Damir S | S | Common Stock | |||||
| Forrest Michael C | S | Common Stock | |||||
| Fleure Thomas J Sr. VP, Geophysical Technology | A | Common Stock | |||||
| White Richard Carl Chairman, President & CEO | A | Common Stock |