| Toby Campbell Fine Art Limited | Wholesale & retail | 2003 |
| TOE Tally Limited | Health & social care | 2014 |
| Tolethorpe Developments Ltd | Real estate | 2007 |
| TOM Dixon-Spain Editing Limited | Information & communication | 2001 |
| Tommy Plummer Tree Services Ltd | Administrative & support | 2013 |
| Toms Techsupport Ltd | Information & communication | 2026 |
| Tooley Street Partnership Group Limited | Real estate | 2022 |
| Tooley Street Partnership Holdings Limited | Real estate | 2022 |
| Tooley Street Partnership Limited | Professional & scientific | 2022 |
| Top Star Consultancy Ltd | Administrative & support | 2017 |
| Topevent Holdings Limited | Extraterritorial | 2017 |
| Torc Precision International Limited | Other services | 2020 |
| Tower Industries Limited | Wholesale & retail | 1995 |
| Tower Marketing Consultancy Limited | Administrative & support | 2008 |
| Town & Country Law (East Anglia) Ltd | Professional & scientific | 2016 |
| Toyoji Ltd | Manufacturing | 2021 |
| Trade Craft Cabinets Ltd | Manufacturing | 2024 |
| Tradition Energy | | 2018 |
| Transition Care Peterborough Ltd | Other services | 2012 |
| Tranzaxt Limited | Financial services | 2023 |
| Tranzforme Limited | Professional & scientific | 2017 |
| Travel PIX Limited | Professional & scientific | 2003 |
| Treadwell & Treadwell Holdings Limited | Financial services | 2018 |
| Treadwell & Treadwell Limited | Real estate | 2015 |
| Treadwell Financial Services LLP | | 2020 |
| Treanor Property Ltd | Real estate | 2018 |
| Treat-Mentor Ltd | Professional & scientific | 2019 |
| Tree Heat Ltd | Wholesale & retail | 2020 |
| Treeline Property Ltd | Real estate | 2016 |
| Treeline Property Management Ltd | Real estate | 2018 |
| Triangle Publishing Ltd | Information & communication | 2019 |
| Triangulate (Worldwide) Limited | Professional & scientific | 2023 |
| Triple 3 Enterprise Ltd | Wholesale & retail | 2024 |
| Trusted Media Agency Limited | Professional & scientific | 2017 |
| TUK TUK Foods Ltd | Manufacturing | 2004 |
| Tunwell Project Services Ltd | Construction | 2019 |
| Tuto Associates Limited | Financial services | 2014 |
| Tuto Money Limited | Financial services | 2008 |
| TVR Restorations Ltd | Construction | 2005 |
| Twelve ALL Saints Ltd | Hospitality | 2016 |
| Twenty SIX Holdings Limited | Financial services | 2022 |
| Two Birds Resources Ltd | Administrative & support | 2023 |
| Two Humans Ltd | Information & communication | 2020 |
| Two's a Crowd Productions | Arts & recreation | 2017 |
| TWS (Stamford) Limited | Real estate | 2022 |
| Tyler-Jarrett Asset Management Ltd | Financial services | 2026 |
| Tyler-Jarrett Financial Planning Ltd | Professional & scientific | 2018 |
| Tyre Hub Auto Centre Oundle Limited | Wholesale & retail | 2026 |
| Uffington Equestrian Limited | Agriculture & fishing | 2021 |
| Ufford Developments Limited | Construction | 2020 |
| Ufford Inns Limited | Hospitality | 2021 |
| Ufford Properties Limited | Other services | 2014 |
| UK Business for PR Ltd | Extraterritorial | 2023 |
| UK Property & Letting Services Ltd | Construction | 2024 |
| UK Wind Services Limited | Manufacturing | 2018 |
| Uncertainty Ltd | Extraterritorial | 2013 |
| Unfold Tech Ltd | Information & communication | 2023 |
| Unichem Slovenia Limited | Wholesale & retail | 2020 |
| Unique Choice Lodges Ltd | Construction | 2013 |
| Unmistakable Designs Limited | Manufacturing | 2020 |
| Upson Electrical Ltd | Construction | 2018 |
| Uptonian Ltd | Information & communication | 2022 |
| Urban Edge Architecture EOT Limited | Administrative & support | 2024 |
| Urban Edge Architecture Limited | Professional & scientific | 2006 |
| Urban Exotica Limited | Transport & logistics | 2021 |
| Urnu Kitchens UK Limited | Construction | 2013 |
| Utilityserve.Com Limited | Professional & scientific | 2000 |
| V.Couzens(Builders)Limited | Real estate | 1970 |
| Vaishno Devi Limited | Hospitality | 2022 |
| Vaxton Limited | Real estate | 2006 |
| Veasey Homes Ltd | Construction | 2024 |
| Velkomin Digital Trading Limited | Professional & scientific | 2013 |
| Veloforte Ltd | Manufacturing | 2016 |
| Vendor Insights Ltd | Information & communication | 2024 |
| Ventilation (UK) Limited | Construction | 2011 |
| Venture Lodges Limited | Real estate | 2020 |
| Venue Review 360 Limited | Information & communication | 2026 |
| Veredis Ltd | Agriculture & fishing | 2025 |
| Vergette Court Management Company Limited | Administrative & support | 2014 |
| Vernamic Limited | Wholesale & retail | 2025 |
| Verostrat Consulting Ltd | Real estate | 2015 |
| Versuvo Ltd | Professional & scientific | 2025 |
| Verve & Vines Ltd | Financial services | 2025 |
| Vestra Health Ltd | Professional & scientific | 2020 |
| Vich Consulting Ltd | Professional & scientific | 2023 |
| Victoria Ford Ltd | Manufacturing | 2024 |
| Vincere Consulting Ltd | Professional & scientific | 2016 |
| Vincere Search Ltd | Administrative & support | 2023 |
| Vine Tree Connections Limited | Hospitality | 2011 |
| Viora Car Wash Ltd | Administrative & support | 2021 |
| Vipan 1941 Limited | Financial services | 2015 |
| Virginia Hartley Interiors Limited | Professional & scientific | 2011 |
| Virtus One Ltd | Information & communication | 2012 |
| Vlasblom Consulting Group Limited | Other services | 2023 |
| Vose Ltd | Real estate | 2012 |
| Voya Construction Ltd | Construction | 2025 |
| Vulpine Development Ltd | Construction | 2017 |
| Waite Resource Management Limited | Professional & scientific | 2015 |
| Wallswork Ltd | Professional & scientific | 2023 |
| Walnut Media Limited | Professional & scientific | 2017 |