SemGroup Corporation and Rose Rock Midstream, L.P. Announce Timing of Third Quarter 2014 Earnings Conference Call and Webcast

TULSA, Okla., Oct. 8, 2014 (GLOBE NEWSWIRE) -- SemGroup® Corporation (NYSE:SEMG) and Rose Rock Midstream®, L.P. (NYSE:RRMS) today announced plans to release third quarter 2014 results after the market closes on Thursday, November 6, 2014.

A joint conference call for investors will be held at 11 AM Eastern on Friday, November 7, 2014 to discuss third quarter results for both SemGroup and Rose Rock Midstream. Hosting the call will be Carlin Conner, president and chief executive officer, and Bob Fitzgerald, senior vice president and chief financial officer. A live webcast presentation of the results will be available on SemGroup's Investor Relations website at and Rose Rock Midstream's Investor Relations website at

What: SemGroup Corporation and Rose Rock Midstream third quarter 2014 earnings conference call and webcast
When: 11:00 AM Eastern, November 7, 2014
Where: 1) Register for the call now by clicking here, or use the numbers below:
· U.S. callers – 1.888.317.6016
· International callers – 1.412.317.6016
2) Log on to the live webcast here

If you are unable to participate in the conference call or webcast, a replay will be available on both websites for a year following the call on the Calendar of Events-Past Events page.

About SemGroup

Based in Tulsa, OK, SemGroup® Corporation (NYSE:SEMG) is a publicly traded midstream service company providing the energy industry the means to move products from the wellhead to the wholesale marketplace. SemGroup provides diversified services for end-users and consumers of crude oil, natural gas, natural gas liquids, refined products and asphalt. Services include purchasing, selling, processing, transporting, terminalling and storing energy.

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.

CONTACT: Investor Relations: Alisa Perkins SemGroup - 918-524-8081 Rose Rock Midstream - 918-524-7711 Media: Kiley Roberson 918-524-8594

Source:SemGroup Corporation;Rose Rock Midstream, L.P.