- Trevx
- TrewCap
- TREWGrip LLC
- Trewport Technologies
- Trex
- Trex Enterprises
- TREXA
- Trexfast
- Trexin Consulting
- Trexle
- trexo robotics
- Treyarch
- Treycent
- Treydit
- Trezeo
- Trezo
- Trezur
- TRG (The Resource Group)
- TRG - The Reach Group
- TRG Companies
- Trgiman
- trgtus
- Tri Counties Bank
- Tri Pointe Homes
- Tri S Security
- Tri Source International
- Tri Town Precision Plastics
- Tri-City Alarm Co
- Tri-City Medical Center
- Tri-Comp Systems
- TRI-D Systems
- Tri-Digital
- Tri-Ed
- Tri-Force Consulting Services
- Tri-in
- Tri-Media Integrated Marketing Technologies
- Tri-Medics
- Tri-Niche
- Tri-Script
- Tri-Star Electronics International
- Tri-State
- Tri-State Engineering
- Tri-State General Insuranceency
- Tri-Tex co
- Tri-Tronics
- Tri5 Ventures
- TRIA Beauty
- Triacta Power Technologies
- TriActive
- Triad Advisors
- Triad Business Journal
- Triad construction
- Triad Digital
- Triad Group Plc
- Triad Insuranceency
- TRIAD Marketing Services
- Triad Media
- Triad Resources, Inc.
- Triad Search Marketing
- Triad Semiconductor
- Triad Speakers
- TRIAD STAGE
- Triad Systems
- Triad Technology Partners
- Triad USA
- Triad Workforce Solutions Collaborative
- Triada Games
- Triada Studio Games
- Triadex Card Mailers
- Triadex Services
- TriadWorks
- Triage Consulting Group
- Triage Revival Project
- Triagem Nut System
- TriagingX
- TriaGnoSys
- Triago
- Trial Funder
- TrialAndErrorDevTeam
- TrialBee
- Trialbox
- Trialect
- Trialfire
- TrialNetworks
- TrialPay
- Trialsai
- TrialView
- TrialWorks
- Trian Fund Management
- Triana Global
- Triangle
- Triangle Angel Partners
- Triangle BioSystems
- Triangle Capital
- Triangle CRM
- Triangle Direct Media
- Triangle Factory
- Triangle Hospitality Solutions
- Triangle Innovative Technologies