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International Octane (L.L.C) 
Formed in 1990 to participate in the oil, gas and petrochemical industries, IOL was the original promoter of, and is a shareholder in, Qatar Fuel Additives Company Limited (QAFAC)..
KS Energy Services Limited
Dutco holds a substantial stake in KS Energy Services Limited, a leading one-stop energy services provider to the global oil and gas, marine and petrochemical industries.
Dutco Energy Ltd
Dutco Energy is a wholly-owned subsidiary of Dubai Transport Company LLC. The company has been established since 2012 and is dedicated to expanding the Group’s interests
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Tarka Resources Inc.
Tarka Resources Inc. is the wholly owned US subsidiary and investment vehicle of Dutco Energy, totally dedicated to investing into US oil and gas assets.