SemGroup Corporation was a publicly-traded company engaged in natural gas, petroleum, and propane pipeline transport. It was organized in Delaware and headquartered in Tulsa, Oklahoma. In December 2019, the company was acquired by Energy Transfer... Wikipedia
Parent organization: Energy Transfer
CEO: Carlin G. Conner (Apr 1, 2014–)
Subsidiaries: Rose Rock Midstream Crude, L.P., SemGas, L.P., HFOTCO, LLC, and more
Headquarters: Tulsa, OK
Founded: February 2001
Defunct: December 5, 2019; 4 years ago
Number of employees: 880 (2018)
Source: S&P Global Market Intelligence