- Fairchild Semiconductor
- Falco USA, Inc.
- Farran Technology Ltd.
- FCT Electronic
- Fermionics Corp.
- Fernwood Magnetics
- Ferraz Corp.
- Ferronics
- Fiber Systems International
- Fifth Dimension, Inc.
- Filtran
- Flight Link Control Ltd.
- Flip Chip Technologies
- Focus Semiconductor
- Fordahl Frequency Control
- Fox Crystals
- Framatome Connectors International (FCI)
- FRB Connectron
- Frequency Devices
- Frequency Management
- Fujitsu
- Fujitsu Microelectronics
- Fujitsu Takamisawa America, Inc.
