| Tobi&Stick Ltd | Wholesale & retail | 2026 |
| Toby Campbell Limited | Construction | 2013 |
| Toe-Tal Podiatry Limited | Health & social care | 2005 |
| Toke Holdings Limited | Real estate | 2011 |
| Tom.K Visuals Ltd | Information & communication | 2020 |
| Tonbo Ltd | Information & communication | 2018 |
| Tonbridge Specsavers Limited | Wholesale & retail | 2002 |
| Tony Earl Limited | Financial services | 2011 |
| Tony Wood Hairdressing Ltd | Other services | 2013 |
| Top Carz Ltd | Wholesale & retail | 2023 |
| Top Dog Villas Limited | Real estate | 2017 |
| Top Flight Bidco Limited | Financial services | 2026 |
| Top Flight Midco 1 Limited | Financial services | 2026 |
| Top Flight Midco 2 Limited | Financial services | 2026 |
| Top GAS Contractors Limited | Construction | 2025 |
| Top Marketing Specialists Ltd | Information & communication | 2016 |
| Top Tier Vending Ltd | Wholesale & retail | 2025 |
| Toppers Poppers & Sparkles Ltd | Wholesale & retail | 2021 |
| TOR Charters LLP | | 2019 |
| Torchlight Recruitment Solutions Ltd | Administrative & support | 2020 |
| Toria Tonia Limited | Manufacturing | 2019 |
| Toro Commercial Finance Ltd | Financial services | 2023 |
| Torquay Domi Audiology Specsavers Limited | Wholesale & retail | 2025 |
| Torquay Visionplus Limited | Wholesale & retail | 1985 |
| Torquay Willows Specsavers Limited | Wholesale & retail | 2017 |
| Torqueflow-Sydex Limited | Extraterritorial | 2007 |
| Torqueher Solutions Ltd | Professional & scientific | 2026 |
| Total Designs Home Improvements Ltd | Construction | 2017 |
| Total Football Centre Ltd | Arts & recreation | 2022 |
| Total Look Development Limited | Hospitality | 1985 |
| Total Pool Builds Ltd | Construction | 2023 |
| Total Security Holdings Limited | Financial services | 2023 |
| Total Security Holdings SUB I Limited | Financial services | 2023 |
| Total Security Holdings SUB II Limited | Financial services | 2023 |
| Total Security Limited | Information & communication | 2016 |
| Total Signs (London) Limited | Manufacturing | 2017 |
| Totally Exclusive Ltd | Wholesale & retail | 2023 |
| Totally Healthcare Limited | Health & social care | 2019 |
| Totnes Specsavers Limited | Wholesale & retail | 2018 |
| Totton Specsavers Limited | Wholesale & retail | 2005 |
| Totton Visionplus Limited | Wholesale & retail | 2005 |
| Touchpoint Housing 1.0 GP Limited | Financial services | 2020 |
| Touchpoint Housing 1.0 LP | | 2020 |
| Touchpoint Housing 1.0 Nominee Limited | Financial services | 2021 |
| Touchpoint Housing 2.0 LP | | 2020 |
| Touchpoint Housing 3.0 LP | | 2021 |
| Touchpoint Housing 4.0 GP Limited | Financial services | 2023 |
| Touchpoint Housing 4.0 LP | | 2023 |
| Touchpoint Housing Jput Co-Investor Limited | Financial services | 2020 |
| Towcester Specsavers Limited | Wholesale & retail | 2017 |
| Tower Bars Ltd | Hospitality | 2022 |
| Tower Burger Ltd | Hospitality | 2020 |
| Tower EOD & Maritime Services Ltd | Professional & scientific | 2023 |
| Tower Properties (South) Limited | Real estate | 2016 |
| Tower Properties Holdings (South) Limited | Financial services | 2024 |
| Town & Country Memorials Ltd. | Administrative & support | 1987 |
| Town & Country Southern (Lettings) Limited | Real estate | 2017 |
| Town Brewery Emsworth Ltd | Real estate | 2015 |
| Townhouseandbellgroup Ltd | Financial services | 2026 |
| Toxic Toy Trader Limited | Wholesale & retail | 2025 |
| TP Southern Property Limited | Real estate | 2017 |
| TP4 Properties Limited | Real estate | 2026 |
| TPC Motorsport Ltd | Information & communication | 2026 |
| Tracknbook Ltd | Information & communication | 2026 |
| Trackside Masonry Services Ltd | Construction | 2025 |
| Trackwise Solutions Limited | Transport & logistics | 2025 |
| Tracy J Barlow Consultants Ltd | Professional & scientific | 2026 |
| Trade Simple Exchange Ltd | Financial services | 2025 |
| Trade Winds Residents Limited | Households | 2002 |
| Tradeit Ltd | Wholesale & retail | 2025 |
| Tradelynx Ltd | Information & communication | 2026 |
| Trademark Travel Ltd | Administrative & support | 2023 |
| Traderpod Ltd | Financial services | 2026 |
| Trades & Labour Ltd | Administrative & support | 2014 |
| Tradewinds (Gosport) Management Limited | Households | 1988 |
| Traepak Ltd | Manufacturing | 2017 |
| Trafalgar Brickwork Limited | Construction | 2015 |
| Trafalgar Enterprises Limited | Professional & scientific | 2023 |
| Trafford Property Group Limited | Real estate | 2026 |
| Trail to Camp Limited | Wholesale & retail | 2025 |
| Trakify Ltd | Information & communication | 2016 |
| Trandafit Limited | Other services | 2025 |
| Tranquility Titchfield Ltd | Other services | 2025 |
| Transformation and Growth Limited | Administrative & support | 2023 |
| Transparently Limited | Information & communication | 2015 |
| Trebble Collectables Limited | Wholesale & retail | 2025 |
| Treenhill Consulting Limited | Professional & scientific | 2019 |
| Treeworx Contractors Ltd | Agriculture & fishing | 2022 |
| Tregalic Limited | Administrative & support | 1981 |
| Trent Personnel Limited | Manufacturing | 2002 |
| Treorchy Specsavers Limited | Wholesale & retail | 2016 |
| Tres Holdings Ltd | Real estate | 2020 |
| Triangle Pianos Limited | Wholesale & retail | 2000 |
| Tribute Construction Services Limited | Construction | 2021 |
| Tribute Property Developments Ltd | Real estate | 2018 |
| Tribute Property Group Ltd | Financial services | 2018 |
| Tribute Property Solutions Ltd | Real estate | 2018 |
| Trident Pharma Consultants Limited | Wholesale & retail | 2012 |
| Tried and Supplied Limited | Hospitality | 2016 |
| Trifecta Architecture Limited | Professional & scientific | 2025 |