| SC 13G | 2009-06-11 | Neuberger Berman Group LLC | SemGroup Energy Partners, L.P. | 1,503,864 | 7.0% | EDGAR |
| SC 13G/A | 2009-02-17 | MSD CAPITAL L P | SemGroup Energy Partners, L.P. | 2,681,490 | 12.6% | EDGAR |
| SC 13G/A | 2009-02-17 | Swank Capital, LLC | SemGroup Energy Partners, L.P. | 4,990,415 | 23.5% | EDGAR |
| SC 13G/A | 2009-02-12 | NEUBERGER BERMAN INC | SemGroup Energy Partners, L.P. | 1,559,899 | 7.3% | EDGAR |
| SC 13G | 2008-12-22 | Costa Brava Partnership III LP | SemGroup Energy Partners, L.P. | 1,178,507 | 5.5% | EDGAR |
| SC 13G/A | 2008-08-27 | MSD CAPITAL L P | SemGroup Energy Partners, L.P. | 2,271,700 | 10.7% | EDGAR |
| SC 13G | 2008-08-18 | MSD CAPITAL L P | SemGroup Energy Partners, L.P. | 2,125,000 | 10.0% | EDGAR |
| SC 13G | 2008-03-10 | NEUBERGER BERMAN INC | SemGroup Energy Partners, L.P. | 2,644,656 | 13.0% | EDGAR |
| SC 13G/A | 2008-02-14 | GPS Partners LLC | SemGroup Energy Partners, L.P. | 18,000 | 0.1% | EDGAR |
| SC 13G | 2008-02-14 | Swank Capital, LLC | SemGroup Energy Partners, L.P. | 1,899,955 | 13.2% | EDGAR |
| SC 13G | 2008-02-14 | GPS Partners LLC | SemGroup Energy Partners, L.P. | 911,594 | 6.3% | EDGAR |
| SC 13G/A | 2008-02-13 | LEHMAN BROTHERS HOLDINGS INC | SemGroup Energy Partners, L.P. | 843,681 | 5.9% | EDGAR |
| SC 13G | 2007-10-23 | LEHMAN BROTHERS HOLDINGS INC | SemGroup Energy Partners, L.P. | 801,481 | 5.6% | EDGAR |