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About Rose Rock Midstream

Rose Rock Midstream, L.P. (NYSE:RRMS) is a growth-oriented Delaware limited partnership formed by SemGroup® Corporation (NYSE:SEMG) to own, operate, develop and acquire a diversified portfolio of midstream energy assets. Rose Rock Midstream provides crude oil gathering, transportation, storage and marketing services. Headquartered in Tulsa, OK, Rose Rock Midstream has operations in 6 different states with the majority of its assets strategically located in or connected to the Cushing, Oklahoma crude oil marketing hub.

SemGroup® is a registered trademark of SemGroup Corporation.
CONTACT: Investor Relations:         Alisa Perkins         SemGroup - 918-524-8081         Rose Rock - 918-524-7711         investor.relations@semgroupcorp.com         roserockir@rrmidstream.com                  Media:         Liz Barclay         918-524-8158         lbarclay@semgroupcorp.com         lbarclay@rrmidstream.com

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