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

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

TULSA, Okla., Oct. 24, 2012 (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 third quarter of 2012 of $0.3925 per
unit, or $1.57 per unit on an annualized basis. This is a 2.6% increase over
the prior quarter and marks the third increase in the distribution to RRMS
limited partner unitholders. For the prior quarter, the cash distribution was
$.3825 per limited partnership unit, or $1.53 on an annualized basis. The
distribution will be paid on November 14, 2012 to all unitholders of record on
November 5, 2012.

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

Rose Rock Midstream logo
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