| TW1 Gardening and Property Services Limited | Construction | 2018 |
| TW1 Physiotherapy Ltd | Health & social care | 2012 |
| TW1 Rentals Ltd | Real estate | 2021 |
| TW1PRAC Ltd | Health & social care | 2023 |
| TW1PROP Ltd | Real estate | 2023 |
| TW2 Developments Ltd | Construction | 2021 |
| TW2 Finance Limited | Professional & scientific | 2023 |
| TWE Finance (UK) Limited | Administrative & support | 2011 |
| Twenty 3 Media Marketing Ltd | Information & communication | 2026 |
| Twenty Eight Garage Ltd | Wholesale & retail | 2021 |
| Twick & Tonic Ltd | Wholesale & retail | 2026 |
| Twick Consulting Ltd | Information & communication | 2021 |
| Twickenham (Freehold) Limited | Real estate | 2014 |
| Twickenham Accident Repair Centre Limited | Extraterritorial | 2014 |
| Twickenham Alive (Ice Rink) Limited | Arts & recreation | 2012 |
| Twickenham Alive Limited | Information & communication | 2017 |
| Twickenham Business Services Ltd | Information & communication | 2018 |
| Twickenham Chicken City Ltd | Hospitality | 2023 |
| Twickenham Consulting Ltd | Financial services | 2025 |
| Twickenham Creative Media Ltd | Information & communication | 2017 |
| Twickenham Dental Care Limited | Health & social care | 2010 |
| Twickenham Designs Ltd | Other services | 2013 |
| Twickenham District Masonic Council Limited | Other services | 1950 |
| Twickenham Experience Ltd | Hospitality | 2000 |
| Twickenham Express Limited | Wholesale & retail | 2023 |
| Twickenham Film Studios Limited | Information & communication | 2020 |
| Twickenham Films Limited | Information & communication | 2020 |
| Twickenham Fine Ales Limited | Manufacturing | 2004 |
| Twickenham Food Ltd | Wholesale & retail | 2021 |
| Twickenham GIN Company Limited | Manufacturing | 2021 |
| Twickenham Grill & Desserts Ltd | Hospitality | 2025 |
| Twickenham Home Ltd | Real estate | 2017 |
| Twickenham Investment Services Limited | Financial services | 2025 |
| Twickenham Kebabs Ltd | Hospitality | 2025 |
| Twickenham Lawn Tennis Club Limited | Arts & recreation | 2018 |
| Twickenham Local Food & Wine Ltd | Wholesale & retail | 2020 |
| Twickenham Management Limited | Real estate | 2019 |
| Twickenham One Ltd | Real estate | 2023 |
| Twickenham Productions Limited | Information & communication | 2023 |
| Twickenham Property Ground 2 Limited | Real estate | 2025 |
| Twickenham Property Ground Limited | Real estate | 2013 |
| Twickenham Property Investment Ground Ltd | Real estate | 2016 |
| Twickenham Property Management Ground Ltd | Real estate | 2013 |
| Twickenham Riverside Trust | Other services | 2011 |
| Twickenham Services Limited | Construction | 2023 |
| Twickenham Studios Group Limited | Financial services | 2025 |
| Twickenham Studios Limited | Information & communication | 2012 |
| Twickenham Therapy Ltd | Health & social care | 2018 |
| Twickenham Two Ltd | Real estate | 2023 |
| Twickenham Upholstery Limited | Manufacturing | 2022 |
| Twickenham Virtual Productions Limited | Information & communication | 2025 |
| Twickenham Yacht Club Ltd | Arts & recreation | 2023 |
| Twickenmums Ltd | Wholesale & retail | 2026 |
| Twicks Barbers Ltd | Other services | 2019 |
| Twins Brothers Ltd | Other services | 2026 |
| Twist & Weave Ltd | Construction | 2026 |
| TWJ Engineering Limited | Professional & scientific | 2018 |
| Two Eleven Residents Limited | Households | 1994 |
| Two Flowers in the Grass Ltd | Wholesale & retail | 2020 |
| Two Recruitment Ltd | Administrative & support | 2023 |
| Twsm Ltd | Health & social care | 2025 |
| Twyford Convenience Store Limited | Wholesale & retail | 2012 |
| TY Maen Volt Space Ltd | Energy | 2025 |
| Tyche Skin Clinic Ltd | Other services | 2021 |
| Tymar Marketing Ltd | Professional & scientific | 2022 |
| Type Nine Ltd | Wholesale & retail | 2024 |
| UAI Cafe Ltd | Hospitality | 2025 |
| UAV Custom Ltd | Wholesale & retail | 2021 |
| UB MOT & Service Ltd | Wholesale & retail | 2024 |
| Ubumwi Platform Ltd | Information & communication | 2025 |
| Uccello Rosso Ltd | Wholesale & retail | 2024 |
| UDC Health Limited | Health & social care | 2017 |
| Ugur Green Limited | Administrative & support | 2025 |
| UK Dried Seafood Ltd | Wholesale & retail | 2023 |
| UK EV Power Ltd | Construction | 2018 |
| UK Immigration Services Limited | Professional & scientific | 2013 |
| UK LUX Investment Group Limited | Wholesale & retail | 2023 |
| UK Metals Expo Limited | Administrative & support | 2021 |
| UK Product Export Limited | Manufacturing | 2018 |
| UK Reader Promotions Ltd | Wholesale & retail | 2013 |
| UK Retails Online Services Ltd | Wholesale & retail | 2020 |
| Ukian Limited | Wholesale & retail | 2020 |
| Ulterra Limited | Real estate | 2003 |
| Ultra Plumbing and Heating Limited | Construction | 2014 |
| Unebr Group Limited | Real estate | 2016 |
| Unifi Communications Limited | Information & communication | 2003 |
| Union Land & Property Limited | Real estate | 2001 |
| Union Trust Capital UK Ltd | Financial services | 2016 |
| Unique Coffee Bar Ltd | Hospitality | 2023 |
| Unistays Ltd | Real estate | 2025 |
| United Europe Limited | Hospitality | 2012 |
| Universal Roofing & Guttering Ltd | Construction | 2023 |
| Universal Tech & Vape Ltd | Wholesale & retail | 2023 |
| Unlimited Consulting Ltd | Information & communication | 2020 |
| Unlimited Trends Ltd | Wholesale & retail | 2017 |
| Unostones Limited | Construction | 2025 |
| Uplifting Developments Ltd | Real estate | 2026 |
| UPP Construction Limited | Construction | 2022 |
| Upper Addison Developments Limited | Real estate | 2019 |
| Upperbloom UK Limited | Administrative & support | 2026 |