| Top Cover Industrial Roofing Limited | Construction | 1996 |
| Top Speed Ltd | Transport & logistics | 2019 |
| Topdeofoods Ltd | Hospitality | 2024 |
| Topgrass (UK) Limited | Administrative & support | 2006 |
| Topmen Plumbing Ltd | Construction | 2023 |
| Topup Automotive & Mobile Mechanic Ltd | Wholesale & retail | 2025 |
| Tornadoes C.I.C. | Manufacturing | 2017 |
| Torvo Ltd | Information & communication | 2026 |
| Total Carrier Logistics Limited | Information & communication | 2010 |
| Total Computer & Network Support (Tcns) Ltd. | Information & communication | 1991 |
| Total Cyber Ltd | Administrative & support | 2020 |
| Total Flooring Ltd. | Construction | 2013 |
| Total Integrated Control Support Limited | Information & communication | 2005 |
| Total Machinery Solutions Limited | Manufacturing | 2012 |
| Total Machinery Supplies Ltd | Wholesale & retail | 2018 |
| Total Plant Solutions Limited | Administrative & support | 2010 |
| Touchstone Consult Limited | Professional & scientific | 2007 |
| Towen Accountancy Ltd | Professional & scientific | 2026 |
| Tower Advisory Service Ltd | Professional & scientific | 2022 |
| Tower Farm Saddlers Ltd | Wholesale & retail | 1998 |
| Town and Country Warwickshire Ltd | Real estate | 2024 |
| Townsend Mill Investments Limited | Financial services | 1992 |
| Townsend Vehicle Hire (Rugby) Limited | Administrative & support | 2014 |
| Townsend Wedding Cars Limited | Administrative & support | 2014 |
| Townsends Kitchen Ltd | Hospitality | 2024 |
| Townsends of Rugby Ltd | Wholesale & retail | 2016 |
| Toyvend PLC | Wholesale & retail | 1993 |
| Tozwa Limited | Health & social care | 2015 |
| TR Nexus Ltd | Manufacturing | 2025 |
| Tracklio Limited | Information & communication | 2025 |
| Traidor Ltd | Financial services | 2022 |
| Training Quality Monitor Limited | Education | 2021 |
| Trans Amadeus Ltd | Extraterritorial | 2010 |
| Trans Logistik Limited | Transport & logistics | 2016 |
| Transforming Lives Educational Trust | Education | 2011 |
| Transglobal Express Solutions Limited | Transport & logistics | 2025 |
| Transglobal Solutions Limited | Transport & logistics | 2016 |
| Transline Labs Limited | Professional & scientific | 2024 |
| Transmike Ltd | Transport & logistics | 2011 |
| Transmyk Ltd | Transport & logistics | 2018 |
| Transparent Property Limited | Real estate | 2019 |
| Transport for Warwickshire Limited | Transport & logistics | 2024 |
| Transreach Talent Ltd | Information & communication | 2017 |
| Transtort Limited | Transport & logistics | 2025 |
| Transvan Ltd | Transport & logistics | 2025 |
| Transway Haulage Ltd. | Transport & logistics | 2014 |
| Travel the Wild Limited | Administrative & support | 2022 |
| Treacles Transport Services Limited | Transport & logistics | 2011 |
| Treble Pipar Ltd | Transport & logistics | 2014 |
| Treetops Park Homes Limited | Construction | 2021 |
| Trehaven Limited | Real estate | 2015 |
| Tremendoc Limited | Information & communication | 2020 |
| Trend Track Strategies Ltd | Professional & scientific | 2025 |
| Trendgrey Holdings Limited | Construction | 2008 |
| Trev Trans Ltd | Transport & logistics | 2016 |
| TRI Equity Properties Ltd | Real estate | 2026 |
| Trichrainn Limited | Administrative & support | 2022 |
| Trickle Limited | Real estate | 2014 |
| Trident Hyperbaric and Medical Services Ltd | Health & social care | 2022 |
| Trinity MK Ltd | Health & social care | 2022 |
| Trioo Prints Ltd | Manufacturing | 2025 |
| Triple Business Solutions Ltd | Professional & scientific | 2019 |
| Triple T'Meds Ltd | Health & social care | 2024 |
| Tripler Homes Limited | Real estate | 2022 |
| Tripontium Ventures Limited | Arts & recreation | 2014 |
| Tristan Stowe Coaching Ltd | Other services | 2020 |
| Tritek Optical Services Limited | Manufacturing | 1990 |
| Tritek Optical Solutions Ltd | Manufacturing | 2004 |
| Trithin Products Limited | Professional & scientific | 1991 |
| Triumph Learning Trust | Education | 2014 |
| Trivista Telerad Solutions Limited | Health & social care | 2025 |
| Tropic Xpress Ltd | Transport & logistics | 2025 |
| Truckbusters Van Sales Limited | Wholesale & retail | 2016 |
| Trucking Tooch Ltd | Transport & logistics | 2024 |
| True Music Limited | Education | 2020 |
| Trust'N'Drive Ltd | Transport & logistics | 2022 |
| TS & CS Deol Holdings UK Limited | Wholesale & retail | 2014 |
| Tsalach Consult Limited | Professional & scientific | 2022 |
| Tsorizo Ltd | Real estate | 2025 |
| TT Holdings (Rugby) Limited | Real estate | 2019 |
| Ttpt Properties Ltd | Real estate | 2023 |
| Tttgm Inns Ltd | Hospitality | 2026 |
| Tube Bender Ltd | Manufacturing | 2011 |
| Tuby Transport Limited | Transport & logistics | 2016 |
| Tucci's Services Limited | Transport & logistics | 2018 |
| Tulnicu Trans Ltd | Transport & logistics | 2014 |
| Tupeaks Ltd | Real estate | 2024 |
| Turbine Mechanics Limited | Professional & scientific | 2021 |
| Turbine Site Services Ltd | Manufacturing | 2020 |
| Turner Engineering Consultants Limited | Professional & scientific | 2009 |
| Turtle Engineering Limited | Manufacturing | 2012 |
| Tuscany House Apartments Management Company Limited | Households | 2006 |
| Tutor Octopus Ltd | Information & communication | 2024 |
| Tutum Consulting Ltd | Construction | 2020 |
| TVR Property Ltd | Real estate | 2018 |
| TW Quality Consultants Limited | Professional & scientific | 2017 |
| Twain Solutions Ltd | Information & communication | 2024 |
| Twentyfour-Sevenservices Ltd | Construction | 2003 |
| Twin Pillars Properties Ltd | Real estate | 2025 |
| Twincon Limited | Professional & scientific | 2010 |