Rose Rock Midstream, L.P. Increases Distributions on Limited Partner Units

TULSA, Okla., July 23, 2015 (GLOBE NEWSWIRE) -- Rose Rock Midstream®, L.P. (NYSE: RRMS) announced today that the Board of Directors of its general partner has declared a cash distribution for the second quarter of 2015 of $0.650 per unit, or $2.60 per unit on an annualized basis. This distribution represents an increase of approximately 2.4% over the prior quarter's distribution of $0.635 per unit, and an approximately 21% increase over the second quarter of 2014 quarterly distribution of $0.535 per unit.

The distribution will be paid on August 14, 2015 to all unitholders of record on August 4, 2015.

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.

This release is a qualified notice under Treasury Regulation Section 1.1446-4(b). Brokers and nominees should treat 100% of Rose Rock Midstream, L.P.'s distributions to foreign investors as being attributable to income that is effectively connected with a United States trade or business. Therefore, distributions to foreign investors are subject to federal income tax withholding at the highest applicable effective tax rate.

CONTACT: Investor Relations:
         Alisa Perkins
         918-524-7711
         [email protected]

         Media:
         Kiley Roberson
         918-524-8594
         [email protected]

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