Welcome to SemGroup: English Français (Canada) Español (Mexico) Visit Rose Rock MidstreamHome Stock Quote is Currently Unavailable About Investor Relations Subsidiaries Safety/Environment Public Awareness News & Media Connect With Us! Careers Compliance Hotline Contact Us Operations / Commodities Crude Oil Natural Gas Refined Products Natural Gas Liquids Asphalt Print this page Welcome to SemGroup: SemGroup® Corporation is a publicly held company that moves energy safely through a network of pipelines, terminals and storage tanks. SemGroup provides gathering, transportation, processing, storage, distribution, marketing and other midstream services primarily to independent oil and natural gas producers, refiners of petroleum products and other market participants located in the Mid-Continent and Rocky Mountain regions of the United States and in Canada, Mexico and the United Kingdom. With the common root word “sem,” meaning one, SemGroup operates as a family of companies through its subsidiaries. SemGroup owns 100% of Rose Rock Midstream G.P., LLC along with its incentive distribution rights and has a majority interest in Rose Rock Midstream L.P. SemGroup also holds a significant amount of equity in NGL Energy Partners. All of the SemGroup divisions are committed to a “zero incident” culture, with employees working to keep the public, and each other, safe. 2013 Annual Report Definitive Proxy Statement and Proxy Latest News Login Crude Oil Statements Owner Relation System - SemGroup®, SemCrude®, SemGas®, SemStream®, SemMaterials MexicoMR, White Cliffs Pipeline®, and Rose Rock Midstream® are registered trademarks of SemGroup Corporation. ©2005-2013 SemGroup. All Rights Reserved. Terms & Conditions Site Map