| State or Country | ||||||||||||||
| Name of Subsidiary | of Incorporation | |||||||||||||
| 1 | Adherant Consulting, LLC | Minnesota | ||||||||||||
| 2 | AGI Mexicana S.A. De C.V. | Mexico | ||||||||||||
| 3 | Alias Investment LLC | Delaware | ||||||||||||
| 4 | Apex Optimisation SRO | Czech Republic | ||||||||||||
| 5 | Apex Optimisation Technologies B.V. | Netherlands | ||||||||||||
| 6 | Argent & Waugh Limited | United Kingdom | ||||||||||||
| 7 | Aspen Technology (Asia) Inc. | Delaware | ||||||||||||
| 8 | Aspen Technology Australia Pty. Ltd. | Australia | ||||||||||||
| 9 | Aspen Technology International, Inc. | Dealware | ||||||||||||
| 10 | Aspen Technology LLC | Russia | ||||||||||||
| 11 | Aspen Technology S.A.S. | Colombia | ||||||||||||
| 12 | Aspen Technology S.L. | Spain | ||||||||||||
| 13 | Aspen Technology Services Corporation | Delaware | ||||||||||||
| 14 | AspenTech Corporation | Delaware | ||||||||||||
| 15 | AspenTech (Beijing) Ltd. | PRC | ||||||||||||
| 16 | AspenTech Japan Co. Ltd. | Japan | ||||||||||||
| 17 | AspenTech (Shanghai) Ltd. | PRC | ||||||||||||
| 18 | AspenTech (Thailand) Ltd. | Thailand | ||||||||||||
| 19 | AspenTech Africa (Pty.) Ltd. | South Africa | ||||||||||||
| 20 | AspenTech Argentina, S.R.L. | Argentina | ||||||||||||
| 21 | AspenTech Canada Corporation | Canada | ||||||||||||
| 22 | AspenTech Canada Holdings, LLC | Delaware | ||||||||||||
| 23 | AspenTech de Mexico S. de R.L. de C.V. | Mexico | ||||||||||||
| 24 | AspenTech Europe BV | Netherlands | ||||||||||||
| 25 | AspenTech Europe, SA/NV | Belgium | ||||||||||||
| 26 | AspenTech Holding Corporation | Delaware | ||||||||||||
| 27 | AspenTech India Private Ltd. | India | ||||||||||||
| 28 | AspenTech Ltd. | United Kingdom | ||||||||||||
| 29 | AspenTech Norway AS | Norway | ||||||||||||
| 30 | AspenTech Pte. Ltd. | Singapore | ||||||||||||
| 31 | AspenTech S.r.l. | Italy | ||||||||||||
| 32 | AspenTech Software Brasil Ltda. | Brazil | ||||||||||||
| 33 | AspenTech Software Corporation | Delaware | ||||||||||||
| 34 | AspenTech Solutions Sdn. Bhd. | Malaysia | ||||||||||||
| 35 | AspenTech Venezuela C.A. | Venezuela | ||||||||||||
| 36 | CAMO Smart Software Inc. | New Jersey | ||||||||||||
| 37 | Camo Software Japan Co Ltd | Japan | ||||||||||||
| 38 | Emerson Paradigm Holding LLC | Delaware | ||||||||||||
| 39 | Mnubo Solutions Inc. | Canada | ||||||||||||
| 40 | Mtelligence Corporation | Delaware | ||||||||||||
| 41 | Open Systems International Australia Pty Ltd | Australia | ||||||||||||
| 42 | Open Systems International Europe SL | Spain | ||||||||||||
| 43 | Open Systems International, Inc. | Minnesota | ||||||||||||
| 44 | Optiplant Inc. | Delaware | ||||||||||||
| 45 | OSI Automation Software Systems (Beijing) Co. Ltd. | PRC | ||||||||||||
| 46 | OSI du Canada Inc. | Canada | ||||||||||||
| 47 | OSI Energy Automation India Private Limited | India | ||||||||||||
| 48 | Paradigm (UK) Holding Limited | United Kingdom | ||||||||||||
| 49 | Paradigm B.V. | Netherlands | ||||||||||||
| 50 | Paradigm France S.A. | France | ||||||||||||
| 51 | Paradigm Geophysical (India) Private Limited | India | ||||||||||||
| 52 | Paradigm Geophysical (KL) Sdn. Bhd. | Malaysia | ||||||||||||
| 53 | Paradigm Geophysical (Nigeria) Limited | Nigeria | ||||||||||||
| 54 | Paradigm Geophysical (U.K.) Limited | United Kingdom | ||||||||||||
| 55 | Paradigm Geophysical B.V. | Netherlands | ||||||||||||
| 56 | Paradigm Geophysical Corp. | Delaware | ||||||||||||
| 57 | Paradigm Geophysical de Venezuela C.A. | Venezuela | ||||||||||||
| 58 | Paradigm Geophysical do Brasil Ltda. | Brazil | ||||||||||||
| 59 | Paradigm Geophysical Italy SRL | Italy | ||||||||||||
| 60 | Paradigm Geophysical Limited | Israel | ||||||||||||
| 61 | Paradigm Geophysical Pty Ltd | Australia | ||||||||||||
| 62 | Paradigm Geophysical S.A. | Argentina | ||||||||||||
| 63 | Paradigm Geophysical Sdn. Bhd. | Malaysia | ||||||||||||
| 64 | Paradigm Geophysical Spain S.L. | Spain | ||||||||||||
| 65 | Paradigm Geoservices Canada Ltd. | Canada | ||||||||||||
| 66 | Paradigm Geotechnology (Egypt) S.A.E. | Egypt | ||||||||||||
| 67 | Paradigm Kazakhstan LLP | Kazakhstan | ||||||||||||
| 68 | Paradigm Middle East FZ-LLC | UAE | ||||||||||||
| 69 | Paradigm Technology (Beijing) Co., Ltd. | PRC | ||||||||||||
| 70 | PT. Paradigm Geophysical Indonesia | Indonesia | ||||||||||||
| 71 | Roxar Paradigm, E&P Software Services LLC | Russia | ||||||||||||
| 72 | Roxar Services AS | Norway | ||||||||||||
| 73 | Roxar Services OOO | Russia | ||||||||||||
| 74 | Roxar Software Solutions AS | Norway | ||||||||||||
| 75 | Roxar Technologies AS | Norway | ||||||||||||
| 76 | Sabisu Ltd. | United Kingdom | ||||||||||||
| 77 | The Fidelis Group, LLC | Texas | ||||||||||||
