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SemGroup Corporation and Rose Rock Midstream to Attend Upcoming Conferences

TULSA, Okla., Feb. 24, 2015 (GLOBE NEWSWIRE) -- SemGroup® Corporation (NYSE:SEMG) and Rose Rock Midstream®, L.P. (NYSE:RRMS) will attend the Barclays Master Limited Partnership Forum on Tuesday, March 3, 2015, as well as the Morgan Stanley Corporate Access Event on March 4, 2015. Both conferences will be held in New York City.

SemGroup and Rose Rock Midstream Chief Executive Officer, Carlin Conner, and Chief Financial Officer, Bob Fitzgerald, will conduct one-on-one meetings with members of the investment community. The presentation materials used during the conference will be accessible on the SemGroup website at www.semgroupcorp.com and the Rose Rock Midstream website at www.rrmidstream.com on Tuesday, March 3, 2015.

About SemGroup

Based in Tulsa, Oklahoma, SemGroup® Corporation is a publicly traded midstream service company providing the energy industry the means to move products from the wellhead to the wholesale marketplace. SemGroup provides diversified services for end users and consumers of crude oil, natural gas, natural gas liquids, refined products and asphalt. Services include purchasing, selling, processing, transporting, terminalling and storing energy.

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. Headquartered in Tulsa, OK, Rose Rock Midstream provides crude oil gathering, transportation, storage and marketing services with the majority of its assets strategically located in or connected to the Cushing, Oklahoma crude oil marketing hub.

CONTACT: Investor Relations: Alisa Perkins, 918-524-8081 investor.relations@semgroupcorp.com roserockir@rrmidstream.com Media: Kiley Roberson, 918-524-8594 kroberson@semgroupcorp.com kroberson@rrmidstream.com

Source:SemGroup Corporation;Rose Rock Midstream, L.P.