| | | | | | | | | | |
| Subsidiaries | | | | Location |
| CMC Materials Global Corporation | | | | Delaware, U.S. |
| NexPlanar Corporation | | | | Delaware, U.S. |
| QED Technologies International, Inc. | | | | Delaware, U.S. |
| CMC Materials Japan KK | | | | Japan |
| CMC Materials KK | | | | Japan |
| CMC Materials B.V. | | | | Netherlands |
| CMC Materials Asia Pte. Ltd. | | | | Singapore |
| CMC Materials Korea, LLC | | | | South Korea |
| CMC Materials Taiwan Co., Ltd. | | | | Taiwan |
| Shanghai Cabot Microelectronics Co. Ltd. | | | | China |
| CMC Materials KMG Corporation | | | | Texas, U.S. |
| KMG-Bernuth, Inc. | | | | Delaware, U.S. |
| KMG de Mexico SA de CV | | | | Mexico |
| CMC Materials EC, Inc. | | | | Texas, U.S. |
| CMC Materials Italia SrL | | | | Italy |
| CMC Materials Luxembourg Holdings S.a.r.l. | | | | Luxembourg |
| CMC Materials France SAS | | | | France |
| CMC Materials UPC SAS | | | | France |
| CMC Materials EC Pte. Ltd. | | | | Singapore |
| CMC Materials Singapore Pte. Ltd. | | | | Singapore |
| CMC Materials SDN BHD | | | | Malaysia |
| CMC Materials UK Limited | | | | United Kingdom |
| CMC Materials UPC Limited | | | | United Kingdom |
| CMC Materials Sealweld Canada, Inc. | | | | British Columbia, Canada |
| KMG Val-Tex, LLC | | | | Texas, U.S. |
| Sealweld Corporation (2003), Inc. | | | | Nevada, U.S. |
| Sealweld (USA), Inc. | | | | Texas, U.S. |
| KMG-Flowchem, Inc. | | | | Delaware, U.S. |
| Flowchem LLC | | | | Delaware, U.S. |
| FLX Inc. | | | | Texas, U.S. |
| International Test Solutions, LLC | | | | Delaware, U.S. |
| International Test Solutions Korea Limited | | | | South Korea |
| International Development Test Co., Ltd. | | | | Taiwan |
| Suzhou Meice Test Technology Co., Ltd. | | | | China |