SemGroup and its subsidiaries have offices conveniently located in the following cities:

Corporate Headquarters

SemGroup Corporation
Two Warren Place
6120 South Yale Avenue, Suite 700
Tulsa, OK 74136-4216
Phone: 918.524.8100

Major U.S. Offices

SemCrude, L.P.
Two Warren Place
6120 South Yale Avenue, Suite 700
Tulsa, OK 74136
Phone: 918.524.8100

SemCrude - Oklahoma City
11501 S. I-44 Service Road
Oklahoma City, OK 73173
Phone: 405.691.5016

SemCrude - Wichita
1223 N. Rock Road
Wichita, KS 67206
Phone: 316.651.5770

SemStream, L.P.
Two Warren Place
6120 South Yale Avenue, Suite 700
Tulsa, OK 74136
Phone: 918.524.8100

SemGas, L.P.
Two Warren Place
6120 South Yale Avenue, Suite 700
Tulsa, OK 74136
Phone: 918.524.8100

SemGas - Wichita
1223 N. Rock Road
Wichita, KS 67206
Phone: 316.630.4360

Major Canada Offices

SemCAMS
Suite 1200, 521 - 3rd Ave SW
Calgary, AB Canada T2P 3T3
Phone: 403.536.3000

SemCanada Crude Company
Suite 1000, 530 - 8th Avenue SW
Calgary, AB Canada T2P 3S8
Phone: 403.213.6000

Major Mexico Office

SemMaterials México, S. de R.L. de C.V.
Privada Universidad No. 3
km 8.5 Carretera Federal Puebla-Atlixco
C.P. 72820
Tlaxcalancingo, Pue. Mexico
Phone: 52.222.284.1930

Major United Kingdom Office

SemLogistics Milford Haven
Main Road
Waterston
Pembrokeshire SA73 1DR
Wales, United Kingdom
Phone: 44.(0).1646.692461