Rose Rock Midstream LP : 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:

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