Rose Rock Midstream, L.P. Increases Distributions

TULSA, Okla., July 25, 2013 (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 2013 of $0.44 per unit, or $1.76 per unit on an annualized basis. This distribution represents an increase of approximately 15% over the second quarter of 2012 quarterly distribution of $0.3825 per unit, and an approximately 2.3% increase over the prior quarter's distribution.

The distribution will be paid on August 14, 2013 to all unitholders of record on August 5, 2013.

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 six states 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.

Investor Relations: Mary Catherine Ward 918-524-7711 Media: Kiley Roberson 918-524-8594