| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Rockwell Automation | USA | |
| 2 | Amperite Co. | USA | |
| 3 | Qualitrol Company | USA | |
| 4 | SE Relays | USA | |
| 5 | c3controls | USA | |
| 6 | Firgelli Automations | USA | |
| 7 | Dow-Key Microwave Corp. | USA | |
| 8 | NTE Electronics Inc. | USA | |
| 9 | Functional Devices Inc. | USA | |
| 10 | Macromatic Industrial Controls Inc. | USA | |
| 11 | Phidgets Inc | USA | |
| 12 | TE Connectivity | USA | |
| 13 | RelComm Technologies Inc. | USA | |
| 14 | GAMA Electronics Inc. | USA | |
| 15 | Instrumentation & Control Systems Inc. | USA | |
| 16 | PICS INC | USA | |
| 17 | Basler Electric Co. | USA |
