Organizers
- Triangle Badminton and Table Tennis
- Triangle Family Shule
- Triathlon ACT
- Triathlon Australia
- Triathlon Australia - High Performance
- Triathlon Australia TRYstars
- Triathlon Business International
- Triathlon Club at CMU
- Triathlon Club at UCI
- Triathlon Club of Oklahoma City
- Triathlon New South Wales
- Triathlon Northern Territory
- Triathlon Queensland
- Triathlon South Australia
- Triathlon Tauranga
- Triathlon Victoria
- TriAthy
- Tribal Sports
- Tri-California Events Inc
- TRICAP Wrestling Club
- TriCat Sports
- Tri-Cities Little League
- Tri-Cities Road Runners
- Tri-City Christian School
- Tri-City Health Center
- Tri-City Soccer Association
- Tri-City Youth Cheer Program
- TriCoach
- TriColumbusGa
- Tri-County CTA
- Tri-County Hill Hopper
- Tri-County Triangel Trail, Inc.
- Tri-County Triangle Trail Half Marathon and 5K
- Tri-County Young Life
- Trident Sports
- TriEvents Ltd
- TriFactor Asia
- Trifitness
- Tri-Force Fitness
- TriFREAKS, Inc.
- TriGators
- TriGrandPrix
- TriGuy Events
- TriHardFitness
- Tri-ing for Kids!!
- Tri-ing For Life
- TRiKC
- TriLakes Duathlon Club
- TriLaVie Triathlon and Running
- Tri-League (Thailand) Co Ltd
