| 2016-09-16 | Sale | Dawson Geophysical Company DWSN | director | 3,990 0.0174% | $7.02 | $27,992 | -17.09% | |
| 2013-12-18 | Sale | Dawson Geophysical Company DWSN | director | 19,730 0.0064% | $7.19 | $141,859 | -36.31% | |
| 2013-12-17 | Sale | Dawson Geophysical Company DWSN | director | 10,270 0.0033% | $7.07 | $72,613 | -34.11% | |
| 2012-06-15 | Sale | Dawson Geophysical Company DWSN | director | 19,675 0.0129% | $9.96 | $195,880 | -9.68% | |
| 2012-06-14 | Sale | Dawson Geophysical Company DWSN | director | 10,325 0.0069% | $9.96 | $102,806 | -8.4% | |
| 2012-03-13 | Sale | Dawson Geophysical Company DWSN | director | 60,000 0.0281% | $10.74 | $644,640 | -12.46% | |
| 2011-12-21 | Sale | Dawson Geophysical Company DWSN | director | 177 <0.0001% | $7.17 | $1,269 | +10.05% | |
| 2010-11-15 | Sale | TETRA Technologies, Inc. TTI | director | 50,000 0.0668% | $10.08 | $504,000 | +17.92% | |
| 2008-11-21 | Dawson Geophysical Company DWSN | director | 35,400 0.0044% | $1.17 | $41,418 | +170% | ||
| 2007-05-16 | Sale | TETRA Technologies, Inc. TTI | director | 36,000 0.0487% | $27.00 | $972,050 | -31.69% | |
| 2006-07-07 | Sale | TETRA Technologies, Inc. TTI | director | 27,000 0.0387% | $30.11 | $813,077 | -11.09% |