- W. L. Gore & Associates
- Wabash Transformer
- WAGO
- WAI (Wetherill Associates, Inc.)
- Waitrony Optoelectronics
- Wakefield Thermal Solutions
- Wakefield-Vette
- Waldom Electronics
- Wall Industries
- Wallen Antennae
- Walsin Technology
- Walther Electric
- Wamco
- Wandboard
- WanTcom
- Wavefront Semiconductor
- Wavelength Electronics
- WaveSplitter Technologies
- WB (Well Buying)
- WD (Western Digital)
- WDC (Western Design Center)
- Wearnes Cambion
- WECO Electrical Connectors
- WEDC (White Electronic Designs Corporation)
- Weida Semiconductor
- Weidmuller
- WEITRON Technology
- WEJ Electronic
- WELLS-CTI
- Weltrend Semiconductor
- Welwyn Components
- Wenteq Microwave
- West Instruments
- West Penn Wire
- Westcode Semiconductors
- Westinghouse Electric
- White Microelectronics
- White-Rodgers
- Wi2Wi
- Wickmann
- Wieland Electric
- Wiha
- Wilbrecht Electronics
- Wilco Corporation
- Willas Electronic
- Willow Technologies
- WIMA
- Winbond Electronic
- Winchester Electronics
- Wincom Electronics
- WiNEDGE & WiRELESS
- Winslow ADAPTICs
- Winson Semiconductor
- Winstar Display
- Wintec Industries
- WINTEK Corporation
- Wireless Products
- Wiremold
- Wisdom Semiconductor
- Wisdom Technologies Int`l
- WIZnet
- WJ Communications
- Wolfgang Knap
- Wolfson Microelectronics
- Woodhead Industries
- Wooseok S. TECH Corp.
- World Magnetics
- WP (World Products)
- WPI Interconnect Products
- WS (Wing Shing Computer Components)
- WTE (Won-Top Electronics)
- Wurth Electronics
- Wuxi NCE Power Semiconductor
- Wuxi Youda Electronics
