David Einhorn - Greenlight Capital
Holding/activity history for SemGroup Corp. (SEMG)
| Period | Shares | % of Portfolio | Activity | % Change to Portfolio | Reported Price |
| 2011 Q4 | 0 | 0 | Sell 100.00% | 0.46 | |
| 2011 Q3 | 968,220 | 0.46 | Reduce 10.53% | 0.05 | $19.96 |
| 2011 Q2 | 1,082,152 | 0.62 | Reduce 39.39% | 0.40 | $25.67 |
| 2011 Q1 | 1,785,483 | 1.04 | Reduce 6.76% | 0.08 | $28.16 |
| 2010 Q4 | 1,915,000 | 1.14 | Buy | 1.14 | $27.17 |