| Tring Personal Training Studio Limited | Arts & recreation | 2016 |
| Tring Pickers Limited | Wholesale & retail | 2021 |
| Tring Powder Finishers Ltd | Manufacturing | 2013 |
| Tring Rural Community Interest Company | Wholesale & retail | 2025 |
| Tring School Enterprises Limited | Education | 2016 |
| Tring Shoe Repairs Limited | Other services | 2021 |
| Tring Shotokan Karate Club | Arts & recreation | 2016 |
| Tring Sport and Leisure Limited | Arts & recreation | 2019 |
| Tring Tanning Salon Ltd | Other services | 2023 |
| Tring Together Business Mart Limited | Administrative & support | 2013 |
| Tring Together Limited | Other services | 2006 |
| Tring Triangle Business Analysis Ltd | Professional & scientific | 2023 |
| Tring Typing Solutions Ltd | Administrative & support | 2015 |
| Tring Youth Project | Other services | 2008 |
| Tringford Farm Limited | Other services | 2016 |
| Tringford Properties Ltd | Real estate | 2013 |
| Trinity Foot & South Herts Limited | Arts & recreation | 2003 |
| Trio Crust Pizza Limited | Hospitality | 2026 |
| Trnsfrm Consulting Ltd | Professional & scientific | 2023 |
| Trophex Limited | Other services | 1989 |
| Trumble Films Ltd | Information & communication | 2015 |
| TT Alloy Refurbishment Ltd | Manufacturing | 2018 |
| Tuan DEV Limited | Information & communication | 2017 |
| Tudor Rose 2026 DEV Ltd | Construction | 2026 |
| Turner Consult Limited | Professional & scientific | 2020 |
| Turner Safety Solutions Limited | Other services | 2003 |
| Turnernowconsulting Ltd | Information & communication | 2024 |
| Typeerror Limited | Professional & scientific | 2022 |
| Tyrells Consulting Ltd | Information & communication | 2019 |
| UAS Aviation Limited | Professional & scientific | 2016 |
| Uast (GB) Ltd | Wholesale & retail | 2020 |
| Ubiquitous Analytics Limited | Information & communication | 2023 |
| Ubiquity IT Limited | Information & communication | 2009 |
| UK Risk Limited | Professional & scientific | 2018 |
| Uncle Wrighty Limited | Manufacturing | 2024 |
| Unherded Ltd | Professional & scientific | 2015 |
| Unit Entertainment Ltd | Information & communication | 2025 |
| Universal Pixels Limited | Arts & recreation | 2016 |
| Universal Technology Group Ltd | Arts & recreation | 2024 |
| Ursa Tech Limited | Information & communication | 2018 |
| Utilities Combined Ltd | Construction | 2025 |
| V Line Doorsets Limited | Wholesale & retail | 2019 |
| Vaisey Holdings Limited | Financial services | 2025 |
| Vantage Capital Advisory Partners Limited | Professional & scientific | 2026 |
| Vantage IT Limited | Extraterritorial | 1995 |
| Vantage IT Solutions Limited | Wholesale & retail | 1999 |
| Vantage Softech Limited | Information & communication | 2011 |
| Vdegrees Ltd | Information & communication | 2019 |
| Vendors Representative Limited | Other services | 2022 |
| Venta BM Ltd | Professional & scientific | 2020 |
| Ventoux Summit Ltd | Information & communication | 2024 |
| Verbatim Global Services Limited | Administrative & support | 2013 |
| Vetartis Ltd | Professional & scientific | 2021 |
| Vetmart Ltd | Professional & scientific | 2006 |
| Vetpix Limited | Professional & scientific | 2008 |
| Vetpol Limited | Education | 2007 |
| Viking Carpentry and Building Ltd | Manufacturing | 2020 |
| Village Wines & Spirits Limited | Wholesale & retail | 2016 |
| Villota Ltd | Information & communication | 2020 |
| Virtual Vehicles Ltd | Wholesale & retail | 2021 |
| Virtualize Limited | Information & communication | 2018 |
| Vmbr Limited | Manufacturing | 2026 |
| Vohra Group Limited | Wholesale & retail | 2019 |
| Volente Limited | Wholesale & retail | 2010 |
| Volito Consulting Limited | Professional & scientific | 2012 |
| Voltura Electrical Solutions Limited | Construction | 2026 |
| Vyne Arts Ltd | Arts & recreation | 2014 |
| W Lamb Developments Limited | Construction | 2020 |
| W Lamb Holdings Limited | Professional & scientific | 1997 |
| W Lamb Limited | Transport & logistics | 1942 |
| W V Solutions Ltd | Construction | 2020 |
| Wagner Energy Ltd | Professional & scientific | 2024 |
| Walk the Dog Limited | Other services | 2006 |
| Wapshottscreate Ltd | Wholesale & retail | 2023 |
| Watford Valves & Speakers Limited | Wholesale & retail | 2003 |
| Watling Bathroom Distribution Ltd | Wholesale & retail | 2019 |
| Waygo Consulting Limited | Professional & scientific | 2024 |
| WCG Consulting Limited | Information & communication | 2010 |
| WDE Consulting Limited | Professional & scientific | 2001 |
| WE ARE the People Team Ltd | Administrative & support | 2024 |
| WE ARE the Talent Team Limited | Administrative & support | 2025 |
| Wedding Candelabra Hire Limited | Administrative & support | 2018 |
| Wellingtons Forest School Ltd | Health & social care | 2025 |
| Wentworth Court CSP MAN Co Limited | Households | 2023 |
| West Highland Air Transport Limited | Transport & logistics | 1998 |
| West Leith Farm Barns Management Limited | Households | 1998 |
| West Partnership Ltd | Real estate | 2017 |
| Westbrook Accountants Ltd | Professional & scientific | 2025 |
| Westcottson Holdings Limited | Real estate | 1991 |
| Westcottson Limited | Real estate | 1952 |
| Western RD Management Company Ltd | Real estate | 2014 |
| Weston Crewe Limited | Transport & logistics | 2016 |
| Weston Developments (Wholesale) Limited | Wholesale & retail | 2017 |
| Whistlebrook Consulting Limited | Information & communication | 2017 |
| Whistlebrook Holdings Limited | Financial services | 2017 |
| Whistlebrook Limited | Information & communication | 1997 |
| Whistlebrook Saas Limited | Information & communication | 2012 |
| Whistlebrook Trustee Limited | Extraterritorial | 2024 |
| White & Weave LLP | | 2025 |
| Whitehill Catering Ltd | Hospitality | 2023 |