- TowerJazz
- Transcendent Design Technology, Inc.
- Transcription Enterprises, Inc.
- TransEDA PLC
- Translogic Polska sp z o.o.
- Transmeta Corporation
- Transwitch Corp
- TriCN Associates LLC
- TriMedia Technologies Inc
- Trimeter Technologies
- TriQuest Design Automation inc.
- Triscend Corporation
- True Circuits, Inc.
- Truechip Solutions
- TSMC
- TSSI
- TTP Communications, PLC
- TXOne Networks
- Ultima Interconnect Technology, Inc.
- UltraSoC
- UMC (United Microelectronics Corporation)
- UniCAD Inc.
- Uniquify, Inc.
- Unisys Corporation
- Unisys silicon design operation
- University of California at Berkeley
- University of Cambridge, Computer Laboratory
- University of Paderborn
- University of Washington
- Valid Logic Systems
- Valiosys
- Valor Computerized Systems Ltd.
- Valtrix Systems
- Valydate Inc.
- Vantage Analysis Systems, Inc.
- VaST Systems Technology Corporation
- VAutomation
- Vayavya Labs
- VCX Database
- VCX Software
- Veeco
- Vennsa Technologies
- VeraTest, Inc.
- Veribest
- Veridae Systems Inc.
- VeriFast Technologies
- Verific Design Automation, Inc.
- Verification IP assets of Qualis
- Verification Technology Co., Ltd. (Vtech)
- Verifyter AB
