| 2008-06-09 | Sale | Natural Gas Services Group, Inc. NGS | director | 80,000 0.6359% | $29.75 | $2.38M | -62.4% | |
| 2008-06-06 | Sale | Natural Gas Services Group, Inc. NGS | director | 27,668 0.2263% | $28.85 | $798,115 | -60.21% | |
| 2008-06-05 | Sale | Natural Gas Services Group, Inc. NGS | director | 45,990 0.3824% | $28.10 | $1.29M | -58.37% | |
| 2006-03-08 | Sale | Natural Gas Services Group, Inc. NGS | director | 200,000 2.011% | $16.49 | $3.3M | -14.14% |