Rose Rock Midstream

Rose Rock Midstream, L.P. is a growth-oriented Delaware limited partnership formed by SemGroup® Corporation to own, operate, develop and acquire a diversified portfolio of midstream energy assets. We are engaged in the business of crude oil gathering, transportation, storage and marketing in Colorado, Kansas, Montana, North Dakota, Oklahoma and Texas. We serve areas that are experiencing strong production growth and drilling activity through our exposure to the Bakken Shale in North Dakota and Montana, the Denver-Julesburg (DJ) Basin and the Niobrara Shale in the Rocky Mountain region, and the Granite Wash and the Mississippian oil trend in the Mid-Continent region. The majority of our assets are strategically located in or connected to the Cushing, Oklahoma crude oil marketing hub. This includes our 17 percent ownership of White Cliffs Pipeline®, the only pipeline that directly moves crude oil out of the DJ Basin to the Cushing market. Cushing is the designated point of delivery specified in all NYMEX crude oil futures contracts and is one of the largest crude oil marketing hubs in the United States. We believe that our connectivity in Cushing and our numerous interconnections with third-party pipelines, refineries and storage terminals provide our customers with the flexibility to access multiple points for the receipt and delivery of crude oil.