SemGroup

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 LP.

SemGroup LP was engaged in diversified services for the North American crude oil and refined products industry. Operations included gathering, transporting, marketing and hedging services. SemGroup owned and operated carrier pipelines, oil terminals, oil transport and service trucks, pipeline injection stations and terminal storage in Oklahoma, Louisiana, Kansas, and Texas. Canadian operations were located in Alberta, British Columbia, and Saskatchewan.

SemCAMS Midstream ULC was a business unit of SemGroup based in Calgary, Alberta. SemCAMS operated four gas processing plants in the Western Canadian Sedimentary Basin. SemCAMS offers midstream service options for wet or dry, sweet or sour gas gathering and processing, as well as dehydration, field compression and sulfur forming and handling.

Houston Fuel Oil Terminal Company was acquired by SemGroup in July 2017. Often referred to as 'HFOTCO,' the business unit operated one of the largest oil terminals in the U.S. HFOTCO is in the Houston Ship Channel on the U.S. Gulf Coast.

Rose Rock Midstream was a master limited partnership formed by SemGroup in 2011. It was originally publicly traded but fully acquired by SemGroup in September 2016.