| 2016-12-09 | Sale | Natural Gas Services Group, Inc. NGS | director | 8,000 0.0631% | $33.30 | $266,400 | -19.58% | |
| 2008-05-12 | Sale | Natural Gas Services Group, Inc. NGS | director | 4,000 0.0332% | $26.54 | $106,166 | -55.3% | |
| 2008-05-09 | Sale | Natural Gas Services Group, Inc. NGS | director | 16,000 0.1298% | $26.34 | $421,419 | -56.07% |