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. 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.