| MS BioScience ( Madison, WI ) | MS Technologies, Inc. ( Skokie, IL ) | MSA Engineering Systems Limited( West Yorkshire ) |
| MS FILTER INC. | MS Technologies, Inc. ( West Point, IA ) | MSA Europe GmbH( Berlin ) |
| MS Filter Inc.( Newmarket ) | Ms. Anna Berman ( Beer Sheva, IL ) | MSA Products, Inc ( Nyack, NY ) |
| MS Filter Inc. ( Newmarket, Ontario ) | Ms. Janet E. Jenny ( Valdosta, GA ) | MSA Products, Inc. ( Nyack, NY ) |
| MS FILTER INC., a Canadian corporation ( Newmarket, CA ) | Ms. SAEIDEH MOUSAVI YEGANEH ( Vancouver, CA ) | MSAFE INC. ( Wilmington, DE ) |
| MS Geraetebau GmbH( Osnabreuck ) | Ms. Setsu Anzai | MSAFE LTD. ( Rehovot, IL ) |
| MS Geraetebau GmbH ( Osnabreuck, DE ) | MS1 - Microsoft Corporation ( Redmond, WA ) | MSB Technologies Ltd. ( Kibutz Givat Brenner, IL ) |
| MS Installation, Inc. ( Park Ridge, IL ) | MS1-Microsoft Corporation | MSB-Management GmbH ( Freden (Leine), DE ) |
| MS Instruments Ltd. | MSA Aircraft Interior Products, Inc. ( San Antonio, TX ) | MSB-MANAGEMENT GMBH ( Freden/Leinen, DE ) |
| MS Macchine e Sistemi S.R.L. ( Bollate, IT ) | MSA Aircraft Interior Products, Ltd. | MSC Healthcare (S) Pte. Ltd. |
| MS Partners, LLC | MSA AIRCRAFT PRODUCTS, L.P. | MSC Power |
| MS Relief Ltd.( Markham ) | MSA Aircraft Products, Ltd. ( San Antonio, TX ) | MSC POWER (S) PTE LTD ( Singapore, SG ) |
| MS Research and Development Co., Ltd. ( Mie, JP ) | MSA AIRCRAFT PRODUCTS, Ltd. A Texas Limited Partnership | MSC Technology Corporation ( Moss Beach, CA ) |
| MS Sedco | MSA Auer GmbH | MSCL, Inc. ( Hollywood, CA ) |
| MS Sedco ( Indianapolis, IN ) | MSA Auer GmbH( Berlin ) | Mscle Holdings Pty. Ltd.( Woodridge ) |
| MS Squared ( Mango, FL ) | MSA Auer GmbH ( Berlin, DE ) | MSD Research, Inc. |
| MS Technologies, Inc. | MSA Engineering Systems Limited( Halifax ) | |
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