| SC 13D/A | 2014-08-13 | SemGroup Corp | NGL Energy Partners LP | 7,652,568 | 9.2% | EDGAR |
| SC 13D/A | 2014-07-03 | SemGroup Corp | Rose Rock Midstream, L.P. | 171,218 | 33.1% | EDGAR |
| SC 13G/A | 2014-02-14 | WELLINGTON MANAGEMENT CO LLP | SemGroup Corp | 1,621,844 | 3.8% | EDGAR |
| SC 13G/A | 2014-02-14 | LONE PINE CAPITAL LLC | SemGroup Corp | 3,906,318 | 9.2% | EDGAR |
| SC 13G/A | 2014-02-14 | Soroban Capital Partners LLC | SemGroup Corp | 1,772,331 | 4.2% | EDGAR |
| SC 13G/A | 2014-02-11 | VANGUARD GROUP INC | SemGroup Corp | 2,534,238 | 6.0% | EDGAR |
| SC 13G | 2014-02-10 | JENNISON ASSOCIATES LLC | SemGroup Corp | 3,497,369 | 8.2% | EDGAR |
| SC 13G | 2014-02-05 | PRUDENTIAL FINANCIAL INC | SemGroup Corp | 3,506,295 | 8.3% | EDGAR |
| SC 13G/A | 2014-01-30 | BlackRock Inc. | SemGroup Corp | 2,515,788 | 5.9% | EDGAR |
| SC 13D/A | 2014-01-10 | SemGroup Corp | Rose Rock Midstream, L.P. | 171,218 | 24.2% | EDGAR |
| SC 13G/A | 2013-02-14 | LONE PINE CAPITAL LLC | SemGroup Corp | 2,172,935 | 5.2% | EDGAR |
| SC 13G/A | 2013-02-14 | Senator Investment Group LP | SemGroup Corp | 1,661,000 | 4.0% | EDGAR |
| SC 13G/A | 2013-02-14 | Soroban Capital Partners LLC | SemGroup Corp | 2,749,969 | 6.6% | EDGAR |
| SC 13G | 2013-02-14 | WELLINGTON MANAGEMENT CO LLP | SemGroup Corp | 3,440,819 | 8.2% | EDGAR |
| SC 13G | 2013-02-13 | VANGUARD GROUP INC | SemGroup Corp | 2,150,356 | 5.1% | EDGAR |
| SC 13G/A | 2013-02-07 | Robeco Investment Management, Inc. | SemGroup Corp | 270,298 | 0.6% | EDGAR |
| SC 13G | 2013-01-30 | BlackRock Inc. | SemGroup Corp | 2,315,395 | 5.5% | EDGAR |
| SC 13D/A | 2013-01-22 | SemGroup Corp | Rose Rock Midstream, L.P. | 171,218 | 24.3% | EDGAR |
| SC 13G | 2012-11-05 | LONE PINE CAPITAL LLC | SemGroup Corp | 2,172,935 | 5.2% | EDGAR |
| SC 13G/A | 2012-04-11 | BlackRock Inc. | SemGroup Corp | 2,053,541 | 4.9% | EDGAR |