The following companies are subsidiares of Aspen Technology: Apex Optimisation, Apex Optimisation Inc., Apex Optimisation Ltd., Apex Optimisation SRO, Apex Optimisation Technologies B.V., Apex Optimisation UK Ltd., Argent & Waugh Ltd., Aspen Tech India Private Ltd., Aspen Tech de Mexico S. de R.L. de C.V., Aspen Technology (Asia) Inc., Aspen Technology Australia Pty. Ltd., Aspen Technology International Inc., Aspen Technology LLC, Aspen Technology S.A.S., Aspen Technology S.L., Aspen Technology Services Corporation, AspenTech (Beijing) Ltd., AspenTech (Shanghai) Ltd., AspenTech (Thailand) Ltd., AspenTech Africa (Pty.) Ltd., AspenTech Argentina S.R.L., AspenTech Canada Corporation, AspenTech Canada Holdings LLC, AspenTech Europe B.V., AspenTech Europe S.A./N.V., AspenTech Holding Corporation, AspenTech Japan Co. Ltd., AspenTech Ltd., AspenTech Pte. Ltd., AspenTech S.r.l., AspenTech Software Brasil Ltda., AspenTech Software Corporation, AspenTech Solutions Sdn. Bhd., AspenTech Venezuela C.A., Hyprotech, Hyprotech UK Ltd., Mtell, Mtelligence Corporation, Petrolsoft, RtTech Software - Cipher IoT, Sabisu Ltd., The Fidelis Group, The Fidelis Group LLC, and mnubo.
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