Rose Rock Midstream, L.P. (NYSE: RRMS) will be a presenter at the NAPTP 2012 MLP Investor Conference in Greenwich, CT. Norm Szydlowski, Chief Executive Officer, will present an overview of the company’s business, commencing at approximately 10:45 a.m. Eastern Time on Thursday, May 24, 2012. A live webcast of the presentation along with materials used during the conference will be accessible on the Rose Rock Midstream website at www.rrmidstream.com on Thursday, May 24, 2012. About Rose Rock Midstream Rose Rock Midstream, L.P. (NYSE: RRMS) is a growth-oriented Delaware limited partnership recently 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 different states with the majority of its assets strategically located in or connected to the Cushing, Oklahoma crude oil marketing hub.