- Therapy Management Corporation
- Third Eye Health
- Thomas Seaman Company
- Thorn Run Partners
- Thornton Hall Nursing and Rehabilitation
- Thrive Personalized Medical Rehabilitation
- ThriveWell
- THW
- THW Design
- Tiger EMS
- TigerConnect
- Time
- Times of Northwest Indiana
- Times of San Diego
- Tiptree
- TL Management
- TLC Care Center
- TLC Management
- TMC
- Tom Price