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

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

TULSA, Okla., Jan. 24, 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 fourth quarter of 2012 of $0.4025 per
unit, or $1.61 per unit on an annualized basis. This distribution represents
an increase of approximately 11 percent over the fourth quarter of 2011
quarterly distribution of $0.3625 per unit, and an approximately 2.5 percent
increase over the prior quarter's distribution.

"We are pleased to announce the fourth consecutive increase in the
distribution to RRMS limited partner unitholders since our initial public
offering in December 2011," said Norm Szydlowski, chairman and chief executive
officer of Rose Rock Midstream.

The distribution will be paid on February 14, 2013 to all unitholders of
record on February 4, 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.

The Rose Rock Midstream logo is available at

CONTACT: Investor Relations:
         Alisa Perkins
         Liz Barclay

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