| THE Malnutrition Pathway C.I.C. | Public administration | 2024 |
| THE Peacocks (Thames Ditton) Management Company Limited | Households | 2002 |
| THE Pebble PR & Marketing Agency Ltd | Professional & scientific | 2022 |
| THE Place on the River Ltd | Administrative & support | 2023 |
| THE Playr House Limited | Other services | 2026 |
| THE Post & VFX Talent Agency Ltd | Administrative & support | 2024 |
| THE Red Berry Club Ltd | Hospitality | 2023 |
| THE Retail Relay Limited | Professional & scientific | 2020 |
| THE SET UP Limited | Professional & scientific | 2009 |
| THE Silver Sprite Ltd | Wholesale & retail | 2020 |
| THE Social Bean Limited | Manufacturing | 2023 |
| THE ST. Jude Foundation | Administrative & support | 1988 |
| THE Stall LLP | | 2024 |
| THE Swindon LOT Limited | Information & communication | 2003 |
| THE Thirsty Monkey Limited | Administrative & support | 2023 |
| THE Together Club Ltd | Professional & scientific | 2021 |
| THE Tour Company (Europe) Limited | Real estate | 1999 |
| THE Trail Run Collective Limited | Arts & recreation | 2026 |
| THE Two Gins Company (Distribution) Ltd | Wholesale & retail | 2020 |
| THE Two Gins Company (Premium Own Brands) Ltd | Wholesale & retail | 2020 |
| THE Two Gins Company Limited | Wholesale & retail | 2020 |
| THE VFX & Post Talent Agency Ltd | Professional & scientific | 2020 |
| THE Video Message Company Ltd | Information & communication | 2018 |
| THE Voop Group Ltd | Information & communication | 2003 |
| THE Woodlands (Tinkerpot Lane) Management Company Limited | Households | 2022 |
| Thegma Limited | Real estate | 2018 |
| Thehgroup.Com Ltd | Administrative & support | 2019 |
| Thevirtualpmo Limited | Construction | 2020 |
| Thol on Stage Ltd | Arts & recreation | 2024 |
| Thomalie Resources Limited | Professional & scientific | 2011 |
| Tian-Ming UK Limited | Hospitality | 2008 |
| Tide Ride Ltd | Information & communication | 2024 |
| Timozo Ltd | Administrative & support | 2016 |
| Tine Creatives Ltd | Information & communication | 2017 |
| TJM Training Limited | Arts & recreation | 2013 |
| TLC World Logistics Ltd | Transport & logistics | 2018 |
| Tollymore Consulting Limited | Professional & scientific | 2026 |
| Tomarian Ltd | Wholesale & retail | 2022 |
| Tony Murray Photography Limited | Professional & scientific | 2011 |
| Touch Clarity Ltd | Professional & scientific | 2013 |
| Traffic and Intelligent Systems Consultants Limited | Administrative & support | 2001 |
| Tressmere Consulting Ltd | Professional & scientific | 2023 |
| TRI a Trading Company Limited | Manufacturing | 2002 |
| Triade Consulting Limited | Administrative & support | 2022 |
| Triforce Entertainment Limited | Administrative & support | 2015 |
| Trinity Creative Ltd | Professional & scientific | 2026 |
| Triple Value Impact Ltd | Administrative & support | 2022 |
| Trupie Ltd | Information & communication | 2022 |
| Trx-C Properties Limited | Real estate | 2021 |
| Tssi Global Sourcing Solutions Limited | Administrative & support | 1978 |
| TUTOR4HOME Limited | Education | 2020 |
| Twist's BED and Breakfast Limited | Hospitality | 2017 |
| Twisted Yarns Limited | Information & communication | 2023 |
| Typeunion Ltd. | Arts & recreation | 2015 |
| Tyrrell Services Limited | Administrative & support | 2006 |
| U S P (London) Limited | Construction | 1988 |
| UK Academe Ltd | Professional & scientific | 2021 |
| UK Atofina Chemistry Limited | Mining & quarrying | 2017 |
| UK Timberley Biostimulant Ltd | Mining & quarrying | 2020 |
| UKU Builders Ltd | Construction | 2020 |
| Umiclay Limited | Extraterritorial | 2021 |
| Under the Rose Limited | Manufacturing | 2009 |
| United Notions Ltd | Information & communication | 2002 |
| Urban Griller Ltd | Hospitality | 2020 |
| Urban Shop Properties Limited | Construction | 1988 |
| Usher Sales and Services Limited | Manufacturing | 2012 |
| Uxbridge 103 Ltd | Households | 2024 |
| Vanbar Securities Limited | Financial services | 1979 |
| Various Finishes Ltd | Information & communication | 2016 |
| Vasili Group Limited | Construction | 2015 |
| Veluxur Ltd | Wholesale & retail | 2025 |
| Venightlocum Ltd | Professional & scientific | 2023 |
| Venture Smart Limited | Financial services | 2020 |
| Vereti Limited | Information & communication | 2026 |
| Victoria Jerram Limited | Professional & scientific | 2010 |
| Victoria’S Weddings Limited | Other services | 2020 |
| Vision Energy Output Limited | Information & communication | 2017 |
| Vitality Village CIC | Manufacturing | 2024 |
| Vivid Rental Group Limited | Financial services | 2021 |
| Voltigeur Development Management Limited | Construction | 2019 |
| VON Bradsky Enterprises Ltd | Professional & scientific | 2011 |
| VRX Consultancy Ltd | Professional & scientific | 2023 |
| VRX Recruitment Ltd | Administrative & support | 2018 |
| Vtasa Trades Ltd | Construction | 2025 |
| VWE Ltd | Information & communication | 2022 |
| VYK Limited | Real estate | 2020 |
| Walrus Partners Ltd | Financial services | 2024 |
| Wandle Pirates Steak House Limited | Hospitality | 2025 |
| Wardstone Limited | Professional & scientific | 1974 |
| Waste to Plate Community Projects CIC | Hospitality | 2024 |
| Waste to Plate Limited | Manufacturing | 2024 |
| Waters Works Limited | Construction | 2015 |
| WCP Hockey Ltd Ltd | Wholesale & retail | 2020 |
| WE ARE Brandbox Ltd | Professional & scientific | 2016 |
| Wealthwise Media Limited | Administrative & support | 2024 |
| Webertek Ltd | Information & communication | 2007 |
| Wedgewood House Management Company Limited(The) | Households | 1974 |
| Weekswerk Ltd | Professional & scientific | 2019 |
| Wemove Dance C.I.C. | Arts & recreation | 2019 |
| Weston Partners Limited | Professional & scientific | 2011 |