Exhibit 21

Subsidiaries of the Registrant

World Fuel Services Corporation, a Florida corporation

– Advance Petroleum, Inc., a Florida corporation, operates under the name “World Fuel Services of FL.”

– PetroServicios de Mexico S.A. de C.V., a Mexico corporation (1)

– Servicios Auxiliares de Mexico S.A. de C.V., a Mexico corporation (1)

– Atlantic Fuel Services, S.A., a Costa Rica corporation (3)

– Baseops International, Inc., a Texas corporation

– Bunkerfuels Corporation, a Delaware corporation

– Casa Petro S.A., a Costa Rica corporation

– PetroServicios de Costa Rica S.A., a Costa Rica corporation (2)

– Pacific Horizon Petroleum Services, Inc., a Delaware corporation

– Resource Recovery of America, Inc., a Florida corporation (3)

– Trans-Tec Services, Inc., a Delaware corporation

– World Fuel Cayman Holding Company I, a Cayman Islands corporation

– Trans-Tec International S.R.L., a Costa Rica corporation

– World Fuel ApS, a Denmark corporation (3)

– Norse Bunkers AS, a Norway corporation

– Marine Energy Arabia Establishment Ltd., a British Virgin Islands corporation

– Marine Energy Arabia Co. LLC, a United Arab Emirate corporation, a majority controlled subsidiary

– World Fuel International S.R.L., a Costa Rica corporation

– World Fuel Singapore Holding Company I Pte. Ltd., a Singapore corporation

– Baseops Europe Ltd., a United Kingdom corporation

– AirData Limited, a United Kingdom corporation

– Trans-Tec Services (UK) Ltd., a United Kingdom corporation

– Trans-Tec Services (Singapore) PTE. Ltd., a Singapore corporation

– Trans-Tec Services (Japan) Co., K.K., a Japan corporation

– Oil Shipping B.V., a Netherlands corporation

– Oil Shipping (Bunkering) B.V., a Netherlands corporation

– Oil Shipping (Hong Kong) Ltd., a Hong Kong corporation

– Oil Shipping (Bunkering) Ltd., a Greece corporation, a majority owned subsidiary (3)

– Oil Shipping (Singapore) Pte. Ltd., a Singapore corporation (3)

– Oil Shipping (Rotherdam) B.V., a Netherlands corporation (3)

– World Fuel Services Limited, a United Kingdom corporation

– Bunkerfuels UK Limited, a United Kingdom corporation

– World Fuel Services (Singapore) PTE. Ltd., a Singapore corporation

– World Fuel Singapore Holding Company II Pte. Ltd., a Singapore corporation (3)

– World Fuel Cayman Holding Company II, a Cayman Islands corporation (3)

– World Fuel Services, Inc., a Texas corporation

– PAFCO LLC, a Delaware corporation (4)

(1) These corporations are owned 50% by Advance Petroleum, Inc. and 50% by World Fuel Services Corporation.

(2) This corporation is owned 55% by Casa Petro S.A. and 45% by World Fuel Services Corporation.

(3) These corporations are inactive.

(4) This unconsolidated corporation is a joint venture company which is equally owned by World Fuel Services, Inc. and Signature Flight Support Corporation, a Delaware corporation unrelated to the Registrant.