| SC 13G/A | 2020-02-14 | Brookfield Public Securities Group LLC | SemGroup Corp | - | - | EDGAR |
| SC 13D/A | 2019-12-10 | Energy Transfer LP | SemGroup Corp | 1 | 100.0% | EDGAR |
| SC 13G/A | 2019-12-09 | WP SemGroup Holdings L.P. | SemGroup Corp | 0 | 0.0% | EDGAR |
| SC 13G/A | 2019-10-01 | CHICKASAW CAPITAL MANAGEMENT LLC | SemGroup Corp | 41,832 | 0.1% | EDGAR |
| SC 13D | 2019-09-25 | Energy Transfer LP | SemGroup Corp | 4,027 | - | EDGAR |
| SC 13D/A | 2019-09-19 | Buffalo Investor I, L.P. | SemGroup Corp | 2,294,805 | 2.9% | EDGAR |
| SC 13G | 2019-07-26 | WP SemGroup Holdings L.P. | SemGroup Corp | 10,051,574 | 11.0% | EDGAR |
| SC 13G/A | 2019-06-10 | VANGUARD GROUP INC | SemGroup Corp | 7,984,257 | 10.0% | EDGAR |
| SC 13D | 2019-05-13 | Buffalo Investor I, L.P. | SemGroup Corp | 7,346,129 | 9.2% | EDGAR |
| SC 13G/A | 2019-02-14 | Harvest Fund Advisors LLC | SemGroup Corp | 2,753,516 | 3.5% | EDGAR |
| SC 13G | 2019-02-14 | Brookfield Public Securities Group LLC | SemGroup Corp | 5,645,499 | 7.1% | EDGAR |
| SC 13G/A | 2019-02-13 | VANGUARD GROUP INC | SemGroup Corp | 7,222,313 | 9.1% | EDGAR |
| SC 13G | 2019-02-13 | TORTOISE CAPITAL ADVISORS, L.L.C. | SemGroup Corp | 4,878,930 | 6.1% | EDGAR |
| SC 13G/A | 2019-02-08 | DIMENSIONAL FUND ADVISORS LP | SemGroup Corp | 6,666,079 | 8.4% | EDGAR |
| SC 13G/A | 2019-02-06 | BlackRock Inc. | SemGroup Corp | 5,621,465 | 7.1% | EDGAR |
| SC 13G/A | 2019-02-01 | CHICKASAW CAPITAL MANAGEMENT LLC | SemGroup Corp | 8,162,662 | 10.3% | EDGAR |
| SC 13D/A | 2018-04-03 | Harvest Fund Holdco L.P. | SemGroup Corp | 0 | 0.0% | EDGAR |
| SC 13G | 2018-04-03 | Harvest Fund Advisors LLC | SemGroup Corp | 7,786,913 | 9.9% | EDGAR |
| SC 13G/A | 2018-02-09 | VANGUARD GROUP INC | SemGroup Corp | 6,631,128 | 8.4% | EDGAR |
| SC 13G | 2018-02-09 | DIMENSIONAL FUND ADVISORS LP | SemGroup Corp | 5,059,476 | 6.4% | EDGAR |