- Aculight Corporation
 - Bothell - Produces solid-state lasers that provide colours tailored to customers' needs in semiconductor processing, medical and government applications. - Allied Pacific Adjusting Group
- Bothell - Provides adjusting services to the Northwest.
- Farwest Aircraft, Inc.
- Bellevue - Specialising in electronics assemblies, and CNC sheet metal machining and fabrication.
- ICOM America, Inc.
- Bellevue - Manufactures amateur, avionics, land mobile and marine radios.
- Northwest Computer Engineering
- Bellevue - Specialises in the design of electronics-based products: PC cards, USB products, medical electronics, test equipment, peripherals.
- NSI, Inc.
- Federal Way - VHF, UHF, and HF transceivers for amateurs worldwide.
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