| 2013-02-15 | Sale | Blackstone Inc. BX | 10 percent owner | 9.59M 2.832% | $33.21 | $318.45M | +21.36% | |
| 2012-12-31 | Sale | Blackstone Inc. BX | 10 percent owner | 792,572 0.2519% | $28.85 | $22.87M | +46.38% | |
| 2012-12-24 | Sale | Blackstone Inc. BX | 10 percent owner | 8M 2.8376% | $28.85 | $230.8M | +49.57% | |
| 2006-08-15 | Sale | NRG Energy, Inc. NRG | See Remarks | 4.21M 3.0983% | $48.41 | $203.95M | +26.63% |