| SC 13D/A | 2016-05-31 | SemGroup Corp | Rose Rock Midstream, L.P. | 20,704,418 | 56.2% | EDGAR |
| SC 13G/A | 2016-02-11 | VANGUARD GROUP INC | SemGroup Corp | 3,192,744 | 7.3% | EDGAR |
| SC 13G/A | 2016-02-10 | GOLDMAN SACHS ASSET MANAGEMENT, L.P. | SemGroup Corp | 2,490,369 | 5.7% | EDGAR |
| SC 13G/A | 2016-02-08 | PRUDENTIAL FINANCIAL INC | SemGroup Corp | 1,186,144 | 2.7% | EDGAR |
| SC 13G | 2016-02-05 | Harvest Fund Advisors LLC | SemGroup Corp | 2,852,770 | 6.5% | EDGAR |
| SC 13G/A | 2016-02-03 | JENNISON ASSOCIATES LLC | SemGroup Corp | 1,161,411 | 2.6% | EDGAR |
| SC 13G/A | 2016-01-27 | BlackRock Inc. | SemGroup Corp | 2,473,774 | 5.6% | EDGAR |
| SC 13G/A | 2016-01-26 | IRIDIAN ASSET MANAGEMENT LLC/CT | SemGroup Corp | 4,376,581 | 10.0% | EDGAR |
| SC 13G | 2016-01-26 | CHICKASAW CAPITAL MANAGEMENT LLC | SemGroup Corp | 2,396,005 | 5.4% | EDGAR |
| SC 13G/A | 2015-07-06 | IRIDIAN ASSET MANAGEMENT LLC/CT | SemGroup Corp | 4,393,762 | 10.0% | EDGAR |
| SC 13D/A | 2015-04-22 | SemGroup Corp | NGL Energy Partners LP | 5,196,788 | 5.0% | EDGAR |
| SC 13D/A | 2015-04-01 | SemGroup Corp | Rose Rock Midstream, L.P. | 20,704,418 | 56.3% | EDGAR |
| SC 13G/A | 2015-02-17 | LONE PINE CAPITAL LLC | SemGroup Corp | 0 | 0.0% | EDGAR |
| SC 13G | 2015-02-13 | GOLDMAN SACHS ASSET MANAGEMENT, L.P. | SemGroup Corp | 2,485,629 | 5.7% | EDGAR |
| SC 13G/A | 2015-02-11 | VANGUARD GROUP INC | SemGroup Corp | 2,711,613 | 6.2% | EDGAR |
| SC 13G/A | 2015-02-10 | JENNISON ASSOCIATES LLC | SemGroup Corp | 2,895,038 | 6.7% | EDGAR |
| SC 13G/A | 2015-02-02 | BlackRock Inc. | SemGroup Corp | 2,498,715 | 5.7% | EDGAR |
| SC 13G | 2015-01-29 | IRIDIAN ASSET MANAGEMENT LLC/CT | SemGroup Corp | 3,580,403 | 8.2% | EDGAR |
| SC 13G/A | 2015-01-27 | PRUDENTIAL FINANCIAL INC | SemGroup Corp | 2,908,971 | 6.7% | EDGAR |
| SC 13D/A | 2015-01-09 | SemGroup Corp | NGL Energy Partners LP | 6,598,767 | 7.4% | EDGAR |