| Company Name | Entity type | Parent/Subsidiary/Independent | Headquarters | No. of Employees | Annual Revenue ($M) | |
|---|---|---|---|---|---|---|
| Honeywell International Inc | Public | Parent | United States of America | 95,000 | 36,662 | |
| Taiwan Semiconductor Manufacturing Co Ltd | Public | Parent | Taiwan | 52,045 | 69,415 | |
| Alstom SA | Public | Parent | France | 80,183 | 17,358 | |
| WPG Holdings Ltd | Public | Parent | Taiwan | 6,060 | 21,575 | |
| Analog Devices Inc | Public | Subsidiary (of JCET-SC (Singapore) Pte Ltd ) | United States of America | 26,000 | 12,306 | |
| Aptiv Plc | Public | Parent | Ireland | 154,000 | 20,051 | |
| Koito Manufacturing Co Ltd | Public | Parent | Japan | 23,488 | 6,388 | |
| STMicroelectronics NV | Public | Parent | Netherlands | 51,323 | 17,286 | |
| China Railway Signal & Communication Corp Ltd | Public | Parent | China | 19,525 | 5,978 | |
| Microchip Technology Inc | Public | Parent | United States of America | 22,600 | 8,439 | |
| Marvell Technology Inc | Public | United States of America | 7,418 | 5,508 | ||
| United Microelectronics Corp | Public | Taiwan | 19,426 | 7,146 | ||
| Westinghouse Air Brake Technologies Corp | Public | Parent | United States of America | 29,000 | 9,677 | |
| Signal Analytics ApS | Private | Independent | Denmark | XYZ | XYZ | |
| Global Foundries Inc | Public | Parent | United States of America | 14,000 | 7,392 | |
| Federal Signal Corp | Public | Parent | United States of America | 4,100 | 1,435 | |
| Cirrus Logic Inc | Public | Parent | United States of America | 1,702 | 1,898 | |
| Zhuzhou CRRC Times Electric Co Ltd | Public | Subsidiary (of CRRC Corp Ltd) | China | 7,733 | 2,680 | |
| Signal Energy Constructors LLC | Private | Subsidiary (of EMJ Corp ) | United States of America | XYZ | XYZ | |
| Lam Research Corp | Public | Parent | United States of America | 17,200 | 17,429 | |
| Bio-Signal Group Corp. | Private | Independent | United States of America | XYZ | XYZ | |
| Signal Media Corporation | Private | Independent | United States of America | XYZ | XYZ | |
| Bose Corp | Private | Parent | United States of America | 6,000 | 3,000 | |
| Signal Ocean Ltd | Private | Independent | United Kingdom | XYZ | XYZ | |
| Trade Signal Inc | Private | Independent | United States of America | XYZ | XYZ | |
| Atlantic Signal LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Am Signal, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| Sigma Healthcare Ltd | Public | Parent | Australia | 156 | 2,609 | |
| Siliconware Precision Industries Co Ltd | Private | Subsidiary (of ASE Technology Holding Co Ltd ) | Taiwan | 23,800 | 3,862 | |
| SIGNAL Inc (Japan) | Private | Subsidiary (of Accenture Plc ) | Japan | XYZ | XYZ | |
| Western Pacific Signal LLC | Private | Subsidiary (of Econolite Group, Inc. ) | United States of America | XYZ | XYZ | |
| American Signal Company | Private | Independent | United States of America | XYZ | XYZ | |
| Signal Communications Corporation | Private | Independent | United States of America | XYZ | XYZ | |
| Network Rail Ltd | Private | United Kingdom | 40,237 | 12,343 | ||
| EVIO Inc | Public | Parent | United States of America | XYZ | XYZ | |
| American Time & Signal Company | Private | Independent | United States of America | XYZ | XYZ | |
| National Signal, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| O2 Czech Republic AS | Private | Subsidiary (of PPF AS ) | Czech Republic | 4,139 | 1,465 | |
| Caliber Med LLC | Private | Independent | United States of America | XYZ | XYZ | |
| RYSE Communications LLC | Private | Subsidiary (of UpStack, Inc. ) | United States of America | XYZ | XYZ | |
| Firstup Inc | Private | Parent | United States of America | XYZ | XYZ | |
| O.M.J.C. Signal, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| Central Signal LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Signal Capital Partners Ltd | Private | Independent | United Kingdom | XYZ | XYZ | |
| Colas SA | Private | Subsidiary (of Bouygues SA) | France | 60,823 | 16,329 | |
| Signal Office Supply Inc | Private | Independent | United States of America | XYZ | XYZ | |
| Viridian Therapeutics Inc | Public | Parent | United States of America | 96 | 0 | |
| National Time And Signal Corporation | Private | Independent | United States of America | XYZ | XYZ | |
| Ircon International Ltd | Public | Subsidiary (of Indian Railways ) | India | 1,341 | 1,321 | |
| Signal Control Product Inc | Private | Independent | United States of America | XYZ | XYZ |
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