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Rose Rock Midstream Announces Public Offering of Common Units

TULSA, Okla., Feb. 9, 2015 (GLOBE NEWSWIRE) -- Rose Rock Midstream®, L.P. (NYSE:RRMS) announced today the commencement, subject to market conditions, of an underwritten public offering of 2,000,000 common units representing limited partner interests. The company also intends to grant the underwriters a 30-day option to purchase up to an additional 300,000 common units.

Rose Rock intends to use the net proceeds from this offering and from any exercise of the underwriters' option to purchase additional common units to fund a portion of its pending acquisition of SemGroup® Corporation's (NYSE:SEMG) remaining crude oil assets, which includes the Wattenberg Oil Trunkline and 50% ownership of Glass Mountain Pipeline.

RBC Capital Markets, Morgan Stanley, UBS Investment Bank and Wells Fargo Securities are acting as the joint book-running managers for the offering. When available, copies of the preliminary prospectus supplement, prospectus supplement, and accompanying base prospectus relating to the offering may be obtained free of charge on the Securities and Exchange Commission's website at www.sec.gov or from the underwriters of the offering as follows:

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

Morgan Stanley
Attn: Prospectus Department
180 Varick Street, 2nd Floor
New York, New York 10014

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

Wells Fargo Securities, LLC
Attention: Equity Syndicate Dept.
375 Park Avenue
New York, New York 10152
Phone: (800) 326-5897

The common units will be offered and sold pursuant to an effective shelf registration statement previously filed with the Securities and Exchange Commission. This press release does not constitute an offer to sell or the 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 state or jurisdiction. The offering is being made only by means of a prospectus and related prospectus supplement meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

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. Headquartered in Tulsa, OK, Rose Rock Midstream provides crude oil gathering, transportation, storage and marketing services with the majority of its assets strategically located in or connected to the Cushing, Oklahoma crude oil marketing hub.

Forward-Looking Statements

Certain matters contained in this press release include "forward-looking statements" within the meaning of the federal securities laws.

All statements, other than statements of historical fact, included in this Press Release including the prospects of our industry, our anticipated financial performance, including distributable cash flow, cash distributions, management's plans and objectives for future operations, capital investments, business prospects, outcome of regulatory proceedings, 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, insufficient cash from operations following the establishment of cash reserves and payment of fees and expenses to pay the minimum quarterly distribution; any sustained reduction in demand for crude oil in markets served by our midstream assets; our ability to obtain new sources of supply of crude oil; the amount of collateral required to be posted from time to time in our transactions; competition from other midstream energy companies; our ability to comply with the covenants contained in and maintain certain financial ratios required by our credit facility; our ability to access credit and capital markets; our ability to renew or replace expiring storage contracts; the loss of or a material nonpayment or nonperformance by any of our key customers; the overall forward market for crude oil; the possibility that our hedging activities may result in losses or may have a negative impact on our financial results; weather and other natural phenomena; hazards or operating risks incidental to the gathering, transporting or storing of crude oil; our failure to comply with new or existing environmental 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: Alisa Perkins 918-524-8081 investor.relations@semgroupcorp.com roserockir@rrmidstream.com Media: Kiley Roberson 918-524-8594 kroberson@semgroupcorp.com kroberson@rrmidstream.com

Source:Rose Rock Midstream