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NYSE: SEMG

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Stockholder Materials

2018 Proxy Statement

2018 Proxy Card

2017 Annual Report

SemGroup®, SemCrude®, SemGas®, White Cliffs Pipeline®, Rose Rock Midstream®, and HFOTCO™

are registered trademarks of SemGroup Corporation. ©2018 SemGroup. All Rights Reserved. Terms & Conditions