SemGroup Corporation and Rose Rock Midstream CEO and CFO to Participate in the US Capital Midstream Corporate Access Day

[at noodls] – TULSA, Okla., Jan. 21, 2013 (GLOBE NEWSWIRE) — SemGroup® Corporation (NYSE:SEMG) (SemGroup) and Rose Rock Midstream, L.P. (NYSE:RRMS) will attend the US Capital Midstream Corporate Access Day in Houston, … more

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