Politics and Business magazines
- Trendwest Resorts, Inc.
- Trex Company, Inc.
- Tri Valley Growers
- Trico Marine Services, Inc.
- Trico Products Corporation
- Tridel Enterprises Inc.
- Trident Seafoods Corporation
- Trigen Energy Corporation
- Trilon Financial Corporation
- TriMas Corp.
- Trimble Navigation Limited
- Trinity Industries, Incorporated
- Trinity Mirror plc
- TRINOVA Corporation
- TriPath Imaging, Inc.
- Triple Five Group Ltd.
- Triple P N.V.
- TriQuint Semiconductor, Inc
- Trisko Jewelry Sculptures, Ltd.
- Triton Energy Corporation