| 2005-12-09 | Sale | Natural Resource Partners L.P. NRP | 1.49M 5.737% | $36.35 | $54.25M | -2.2% | ||
| 2005-08-09 | Sale | Natural Resource Partners L.P. NRP | 10 percent owner | 8.4M 29.1208% | $30.50 | $256.2M | -10.89% | |
| 2005-03-14 | Sale | Quanta Services, Inc. PWR | 10 percent owner | 3.54M 2.9602% | $7.16 | $25.38M | +53.9% | |
| 2004-12-09 | Sale | Quanta Services, Inc. PWR | 10 percent owner | 369,200 0.2944% | $7.00 | $2.58M | +17.21% | |
| 2004-10-04 | Sale | Quanta Services, Inc. PWR | 10 percent owner | 2.63M 1.9992% | $5.49 | $14.41M | +26.83% | |
| 2004-09-30 | Sale | Quanta Services, Inc. PWR | 10 percent owner | 17.5M 13.8788% | $5.49 | $96.09M | +31.57% | |
| 2004-03-01 | Sale | Quanta Services, Inc. PWR | 10 percent owner | 3.26M 2.7514% | $8.30 | $27.05M | -22.6% |