D
- NXS Forefront Inc.
- D3 Semiconductor
- Digital Six Laboratories, LLC
- Daburn
- DAB-Embedded
- Dailywell
- Daishinku Corporation
- Dakota Micro, Inc.
- Dalcomm Tech
- Dale / Vishay
Draloric / Vishay - Dallas Semiconductor
- Daniels Manufacturing
- Danisense
- Dantona Industries, Inc.
- Darfon
- Dart Controls
- Darwin Tech
- Data Instruments / Honeywell
- Data Modul Inc.
- Datacolor
- DataComm Electronics, Inc.
- Dataforth
- Datawave Wireless
- DAVE Embedded Systems
- Davies Molding, LLC.
- Dawar Technologies
- DB Unlimited
- DBM Optix
- DComponents
- ddm hopt+schuler
- Deca
- Decawave / Qorvo
- Deepwave Digital
- DEI (Berkeley Nucleonics Corporation)
Directed Energy Inc. - Delkin Devices
- Dell EMC OEM Solutions
- Delphi
- Delta Components
- Delta Controls
- Delta Electronics Mfg Corp
- Delta Electronics / Cyntec
- Delta Electronics / EMI
Delta Electronics / Fans
Delta Electronics / Industrial Automation
Delta Electronics / Power
Delta Electronics, Inc. - Deltatech / Sensata Technologies
- Deltron
DEM Manufacturing - Denso Robotics
- Deschner Corporation
- Desco Industries Inc.
- Design Gateway
- DET LLC/Diamond Edge Technology LLC
- DEUTSCH Connectors / TE Connectivity
DEUTSCH ICT / TE Connectivity - Device Solutions
- DFRobot
- DGH Corporation
- Dialight
- Dialog Semiconductor / Renesas Electronics
- DiceKeys
- Dielectric Laboratories (Knowles)
- Dierre Group
- Digi
- Digilent, Inc.
- Digital Power Corporation
- Digital View Inc.
- DigiVac
- Digi-Pas Technologies
- DINKLE Corporation USA
- DINStorage
- Diode Laser Concepts
- Diodes Delight
- Diodes Incorporated View Product
- DIOO Microcircuits
- Diotec Semiconductor
- Diptronics Manufacturing Inc.
- Display Logic
- DISPLAY VISIONS
- Displaytech
- DITEL
- DiTom Microwave Inc.
- Divelbiss Corporation
- Diwell Electronics
- DLC Display
- DLI
- DLP Design, Inc.
- DMC Tools
- DMSI International
- DNmicron
- Doodle Labs
- Dormeyer (Division of Johnson Electric)
- Dou Yee Enterprises
- DreamVu
- dresden elektronik
- Dreyer Electronics LLC
- DSI/C & B Industries
- DunAn Microstaq Inc (DMQ)
- Dunwell Tech, Inc.
- Dura-Con / Cinch Connectivity Solutions
- Dustronics
- Dynapar Corp
- Dynastream Innovations Inc. (Garmin Canada Inc.)
- Dynics
- D.SignT