- Galaxy Semiconductor
- Gambit Automated Design, Inc.
- Gatefield
- GateRocket
- Gateway Design Automation
- Gear Design Solutions, Inc.
- Gemini Design Technology Inc.
- Genedax
- Georgia Tech
- Get2Chip Inc.
- Giga Scale Integration Corporation
- Global Semiconductor Alliance
- Global Unichip Corp.
- GlobalFoundries
- Goanna Software Pty Ltd
- Gold Standard Simulations Ltd.
- Gradient DA’s electrothermal analysis technology
- Gradient Design Automation
- Green Mountain Computing Systems
- Hammercores, Inc.
- HARDI Electronics AB
- Harness Software Group
- Hd Lab, K.K.
- HDAC Inc.
- HDL Design House
- Helic, Inc.
- Helios Software Engineering Ltd.
- Heterogeneous System Architecture (HSA) Foundation
- Hewlett-Packard Company
- HHB assets
- HHB Softron Inc.
- High Level Design Systems
- HighIP Design Company
- Hoschar AG
- HP Labs
- HPL Technologies, Inc.
- Huins
- Hunter and Ready
- HyperLynx, Inc.
- IBM
- IBM – Altium group
- IBM Foundry
- IC Manage
- ICScape, Inc.
- ICUCOM Corporation
- IEC
- IEEE
- IEEE 1800.2
- IEEE DASC
- IEEE SA
