| 2008-06-09 | Sale | Natural Gas Services Group, Inc. NGS | director | 40,000 0.3206% | $30.00 | $1.2M | -62.4% | |
| 2005-09-12 | Sale | Natural Gas Services Group, Inc. NGS | director | 20,000 0.2679% | $23.46 | $469,122 | -23.68% | |
| 2005-08-31 | Sale | Natural Gas Services Group, Inc. NGS | director | 30,000 0.381% | $19.42 | $582,467 | -11.82% |