RRMS Rose Rock Midstream, L.P. Common Units Representing Limited Partner Interests

Rose Rock Midstream®, L.P. (NYSE:RRMS) announced today that the Board of Directors of its general partner has declared a cash distribution with respect to the second quarter of 2016 of $0.66 per unit, or $2.64 per unit on an annualized basis, which is unchanged from its distribution with respect to the first quarter of 2016. This distribution represents an increase of approximately 1.5% over the distribution of $0.650 per unit with respect to the second quarter of 2015.

The distribution will be paid on August 12, 2016 to all unitholders of record on August 2, 2016.

About Rose Rock MidstreamRose 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.

This release is a qualified notice under Treasury Regulation Section 1.1446-4(b). Brokers and nominees should treat 100% of Rose Rock Midstream, L.P.’s distributions to foreign investors as being attributable to income that is effectively connected with a United States trade or business. Therefore, distributions to foreign investors are subject to federal income tax withholding at the highest applicable effective tax rate.

Contacts:
Investor Relations:             
Alisa Perkins                   
918-524-7711                    
roserockir@rrmidstream.com

Media:
Kiley Roberson
918-524-8594
kroberson@rrmidstream.com