| CompanyID | Company | Description | State |
| 1985 | M/S, Merjan International Trading Company. | We are a leading company of Import business of equipments manufacturing plants since 1992 in Pakistan | PA |
| 3576 | Magna Mixer Co. | Horizontal Mixers, Cookie Depositers, & Custom Food Processing Equipment. | OH |
| 949 | Malco Mfg. Corp. | Manufacturing Aluminum Containers for the Food Industry. Products include baking pans, pie pans, aluminum racks, etc. | CA |
| 975 | Marotta Scientific Controls | designers and manufacturers of fluid control components (valves, valve manifolds, pressure regulators) and systems, actuators and electronic controls | NJ |
| 2045 | MAS | MAS Mahmoud El-Sayyad
Oil & Gas Turbines Compreesors Pipline | AL |
| 1289 | Meikle EMS Automation | OEM, DESIGN AND BUILD AUTOMATED EQUIPMENT | NC |
| 315 | Miami Machine Corp. | Paper Machinery Manufacturer | OH |
| 16 | Micro Motion Inc. | A division of Emerson Electric Company. | CO |
| 2658 | MJB & ASSOCIATES | Publisher of resources for services and products from companies that have a collective bargaining relationship with a labor union. | CA |
| 202 | MKS Instruments | A worldwide developer, manufacturer and supplier of instruments and components used to measure, control and analyze gases in semiconductor manufacturing and similar industrial manufacturing processes. | MD |
| 23 | Moore Process Automation | A division of Siemens. | PA |
| 1032 | Motornostix | Machine condition monitoring for preventive maintenance & management - Motornostix uses latest technology to provide web-based info for continuously monitored industrial machinery - suitable for all types of industrial installations. | OH |
| 194 | Moyno, Inc. | Moyno, A division of Robbins & Myers Inc, A leading manufacturer and marketer of Moyno progressing cavity pumps and systems and RKL pinch valves and controls. | OH |
