SemGroup Corporation and Rose Rock Midstream, L.P. Announce Timing of Third Quarter 2012 Earnings Conference Call and Webcast

SemGroup Corporation logo

TULSA, Okla., Oct. 8, 2012 (GLOBE NEWSWIRE) -- SemGroup® Corporation (NYSE:SEMG) and Rose Rock Midstream, L.P. (NYSE:RRMS) today announced plans to release third quarter 2012 results after market closes on Thursday, November 8, 2012.

A joint conference call for investors will be held at 11 AM EST on Friday, November 9, 2012 to discuss third quarter results for both SemGroup and Rose Rock Midstream. Hosting the call will be Norman J. Szydlowski, President and Chief Executive Officer, and Robert N. Fitzgerald, Senior Vice President and Chief Financial Officer. A presentation of the results will be posted before the conference call 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 2012 earnings conference call and webcast
When: 11:00 AM Eastern, Nov. 9, 2012
Where: 1) Phone conference call
* U.S. callers - 877.359.3652, pass code 34165494
* International callers - 720.545.0014, pass code 34165494
2) Log on to the webcast at
3) Log on to the webcast at

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.

The SemGroup Corporation logo is available at

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 6 different states with the majority of its assets strategically located in or connected to the Cushing, Oklahoma crude oil marketing hub.

SemGroup® is a registered trademark of SemGroup Corporation.

CONTACT: Investor Relations: Alisa Perkins SemGroup - 918-524-8081 Rose Rock - 918-524-7711 Media: Liz Barclay 918-524-8158

Source:SemGroup Corporation