- Wafer Scale (WSI)
- Wakefield Engineering
- Wall Industries, Inc.
- Walsin Technology Corp.
- Watkins-Johnson
- WECO Electrical Connectors, Inc.
- Weinschel Associates
- Wenzel Associates
- Westcode Semiconductors
- Western Design Center
- Western Electronic Components
- W.H. Brady Co.
- White Microelectronics
- Wickmann
- Wieland, Inc.
- WIMA
- Winbond
- Wireless-Radio
- World Magnetics
- World Products
