| MK Consulting Inc. ( Cranberry Township, PA ) | MK Products ( Irvine, CA ) | MKP Structural Design Associates, Inc. ( Dexter, MI ) |
| MK Consulting, Inc. | MK Rail Corporation ( Boise, ID ) | MK-Produkter Mekanik Kemi AB( Taby ) |
| MK Consulting, Inc. ( Pittsburgh, PA ) | MK SEIKO CO., LTD ( Nagano-ken, JP ) | MK-Produkter Mekanik & Kemi AB( Taby ) |
| MK Corporation( Tokyo ) | MK Seiko Co., Ltd. ( Bunkyo-ku, JP ) | MKR Group, LLC ( Richland, MI ) |
| MK Diamond Products, Inc. ( Torrance, CA ) | MK Seiko Co., Ltd.( Chikuma-shi ) | MKS - ION SYSTEMS, INC. ( Alameda, CA ) |
| MK ELECTON CO., LTD ( Yongin-city, KR ) | MK Seiko Co., Ltd.( Kohshoku ) | MKS Enterprises, LLC ( Gilbert, AZ ) |
| MK ELECTRON CO. LTD. ( Yongin-city, KR ) | MK Seiko Co., Ltd. ( Nagano, JP ) | MKS Instruments ( Alameda, CA ) |
| MK Electron Co., Ltd ( Kyongki-do, KR ) | MK SEIKO CO., LTD. ( Nagano-ken, JP ) | MKS Instruments ( Andover, MA ) |
| MK Electron Co., Ltd. | MK, L.L.P. ( Grapevine, TX ) | MKS Instruments ( Andover, MD ) |
| MK ELECTRON CO., LTD. ( Gyeonggi-do, KR ) | MK3SD, Ltd. ( Houston, TX ) | MKS Instruments ( Wilmington, MA ) |
| MK Electron Co., Ltd.( Kyongki-do ) | MKG, Inc. ( Newport Beach, CA ) | MKS Instruments Inc |
| MK Electron Co., Ltd.( Yongin ) | MKL-Miniaturkugellager GmbH( Leutkirch ) | MKS Instruments Inc. |
| MK ELECTRON CO., LTD. ( Yongin, KR ) | MKM (SARL) ( Seynod, FR ) | MKS Instruments Inc. ( Andover, MA ) |
| MK ELECTRON CO., LTD. ( Yongin-city, KR ) | MKM S.R.L. ( Albenga, IT ) | MKS Instruments, Inc. |
| MK Hutchison Investments, LP ( Plano, TX ) | MKN Maschinenfabrik Kurt Neubauer GmbH Co.( Wolfenbuttel ) | MKS Instruments, Inc. ( Andover, MA ) |
| MK Industries ( Grosse Pointe Farms, MI ) | MKN Maschinenfabrik Kurt Neubauer GmbH & Co. ( Wolfenbuttel, DE ) | MKS Instruments, Inc. ( Willmington, MA ) |
| MK Medical Ltd. ( Tokyo, JP ) | MKP Structural Design Associates, Inc. ( Ann Arbor, MI ) | |
|