Rose Rock Midstream Announces Pricing of Public Offering of Common Units

Rose Rock Midstream Announces Pricing of Public Offering of Common Units

TULSA, Okla., Aug. 13, 2013 (GLOBE NEWSWIRE) -- Rose Rock Midstream^®, L.P.
(NYSE:RRMS) today announced that it has priced an underwritten public offering
of 4,750,000 common units representing limited partner interests at an
offering price of $33.44 per unit. The underwriters have been granted a 30-day
option to purchase up to an additional 712,500 common units.

The partnership intends to use the net proceeds from this offering and from
any exercise of the underwriters' option to purchase additional common units
to repay borrowings outstanding under its revolving credit facility, fund
capital expenditures and for general partnership purposes.

Barclays, UBS Investment Bank, Citigroup, Deutsche Bank Securities and RBC
Capital Markets acted as joint book-running managers for the offering.

The offering is being made by means of a prospectus supplement and
accompanying base prospectus, copies of which may be obtained from the
underwriters as follows:

Barclays
c/o Broadridge Financial Solutions
1155 Long Island Avenue
Edgewood, New York 11717
Phone: (888) 603-5847
Email: Barclaysprospectus@broadridge.com

UBS Investment Bank
Attn: Prospectus Department
299 Park Avenue, 28th Floor
New York, New York 10171
Phone: (888) 827-7275

Citigroup
c/o Broadridge Financial Solutions
1155 Long Island Avenue
Edgewood, New York 11717
Phone: (800) 831-9146
batprospectusdept@citi.com

Deutsche Bank Securities Inc.
Attn: Prospectus Department
60 Wall Street
New York, New York 10005-2836
Phone: (800) 503-4611
prospectus.cpdg@db.com

RBC Capital Markets
Attn: Prospectus Department
3 World Financial Center
200 Vesey Street, 8th Floor
New York, New York 10281-8098
Phone: (877) 822-4089

You may also obtain these documents for free when they are available by
visiting EDGAR on the SEC website at www.sec.gov.

This press release does not constitute an offer to sell or a solicitation of
an offer to buy the securities described herein, nor shall there be any sale
of these securities in any state or jurisdiction in which such an offer,
solicitation or sale would be unlawful prior to registration or qualification
under the securities laws of any such jurisdiction. The offering will be made
only by means of a prospectus and related prospectus supplement, which are
part of an effective registration statement.

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.

Rose Rock Midstream^® is a registered trademark of SemGroup Corporation.

Forward-Looking Statements

Certain matters contained in this press release include "forward-looking
statements" within the meaning of Section 27A of the Securities Act of 1933,
as amended, and Section 21E of the Securities Exchange Act of 1934, as
amended.

All statements, other than statements of historical fact, included in this
press release, including the prospects of our industry, our anticipated
financial performance, management's plans and objectives for future
operations, business prospects, market conditions and other matters, may
constitute forward-looking statements. Although we believe that the
expectations reflected in these forward-looking statements are reasonable, we
cannot assure you that these expectations will prove to be correct. These
forward-looking statements are subject to certain known and unknown risks and
uncertainties, as well as assumptions that could cause actual results to
differ materially from those reflected in these forward-looking statements.
Factors that might cause actual results to differ include, but are not limited
to, our ability to comply with the covenants contained in and maintain certain
financial ratios required by our credit facilities;any sustained reduction in
demand for the petroleum products we gather, transport, process, store and
market; our ability to obtain new sources of supply of petroleum products; our
failure to comply with new or existing environmental laws or regulations or
cross border laws or regulations; the possibility that the construction or
acquisition of new assets may not result in the corresponding anticipated
revenue increases;as well as other risk factors discussed from time to time
in each of our documents and reports filed with the SEC.

Readers are cautioned not to place undue reliance on any forward-looking
statements contained in this Press Release, which reflect management's
opinions only as of the date hereof. Except as required by law, we undertake
no obligation to revise or publicly release the results of any revision to any
forward-looking statements.

CONTACT: Investor Relations:
         Mary Catherine Ward
         918-524-8081
         roserockir@rrmidstream.com
        
         Media:
         Kiley Roberson
         918-524-8594
         kroberson@rrmidstream.com

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