| Tuckers Agri Services Ltd | Agriculture & fishing | 2020 |
| Tudor Rose (UK) Limited | Administrative & support | 1998 |
| Tufwell Glass Limited | Manufacturing | 2014 |
| Tugas Bar Ltd | Hospitality | 2025 |
| Tukas Roofing Solutions Ltd | Construction | 2022 |
| Tulip Asset Finance Consultancy Ltd | Wholesale & retail | 2020 |
| Tulise Ltd | Information & communication | 2009 |
| Tuliwano Ltd | Information & communication | 2025 |
| Tulleys Entertainment Group Limited | Arts & recreation | 2019 |
| Tulleys Farm Limited | Administrative & support | 2025 |
| Tulleys Growing Inspired Limited | Agriculture & fishing | 2024 |
| Tungsten & Carbide (UK) Limited | Wholesale & retail | 2015 |
| Turkiye Activities UK Ltd | Administrative & support | 2023 |
| Turkuaz Crawley Limited | Hospitality | 2021 |
| Turned on Film Services Limited | Construction | 2016 |
| Turned on LED Supplies Ltd | Information & communication | 2016 |
| Turned on Salon Services Ltd | Construction | 2024 |
| Turners Hill Lighthouse Limited | Health & social care | 2017 |
| Turret Consulting Ltd | Professional & scientific | 2023 |
| Turtle Tots East Surrey Limited | Education | 2017 |
| TW Woodwork Ltd | Manufacturing | 2025 |
| Twain Limited | Health & social care | 2018 |
| Twinkle Trust Animal AID | Professional & scientific | 2001 |
| Twinshield Security Services Ltd | Administrative & support | 2026 |
| Twintechsa Ltd | Information & communication | 2025 |
| Twisted Cheer and Dance | Arts & recreation | 2020 |
| Twisted Cheer and Dance Trading Ltd | Education | 2024 |
| Twocock Limited | Real estate | 2021 |
| Tyde Group Limited | Information & communication | 2020 |
| Tyre Focus Ltd | Wholesale & retail | 2023 |
| Tytan Carpentry Limited | Manufacturing | 2019 |
| TZ Square Property Ltd | Real estate | 2025 |
| TZM Estates Ltd | Administrative & support | 2025 |
| U Khalid & Co Ltd | Wholesale & retail | 2025 |
| Uber Airport Parking Ltd | Administrative & support | 2025 |
| Ubiquity Service Limited | Wholesale & retail | 2024 |
| Ucheche Medicare Limited | Health & social care | 2014 |
| Ugandans in Crawley CIC | Health & social care | 2025 |
| UGC by Annalise Ltd | Professional & scientific | 2025 |
| UH Enterprises Ltd | Hospitality | 2018 |
| UJI Consulting Ltd | Information & communication | 2023 |
| UK Accounts & Tax Ltd | Professional & scientific | 2016 |
| UK Business Portal Ltd | Information & communication | 2025 |
| UK Car Trading Ltd | Wholesale & retail | 2021 |
| UK CARS247 Ltd | Transport & logistics | 2023 |
| UK CT Advisory Ltd | Administrative & support | 2025 |
| UK Data Directive Ltd | Information & communication | 2019 |
| UK Digital Services Ltd | Wholesale & retail | 2016 |
| UK Electrical Wholesale Limited | Wholesale & retail | 1995 |
| UK Fastenings.Com Ltd | Financial services | 2019 |
| UK Garden Furniture Ltd | Wholesale & retail | 2025 |
| UK Great Ltd | Manufacturing | 2022 |
| UK International Pathways Limited | Education | 2026 |
| UK IT Services Ltd | Information & communication | 2023 |
| UK Medical Advice Consultancy Limited | Real estate | 2013 |
| UK RPI Limited | Administrative & support | 2017 |
| UK Search Group Ltd | Administrative & support | 2020 |
| UK Soundproofing Ltd | Construction | 2011 |
| UK Tapeball Ltd | Arts & recreation | 2026 |
| UK Travel Deals Ltd | Transport & logistics | 2025 |
| UK Truck Service Ltd | Manufacturing | 2023 |
| UK Web Developers Ltd | Information & communication | 2025 |
| UKA Construction Group Ltd | Construction | 2022 |
| Ukcc Auto Techs Limited | Wholesale & retail | 2016 |
| UKD Accountants Ltd. | Professional & scientific | 2012 |
| Ukenzy Limited | Wholesale & retail | 2025 |
| Ukilp Ltd | Professional & scientific | 2021 |
| Ultimate Data Manager Limited | Extraterritorial | 2016 |
| Ultimate Drivers Ltd | Administrative & support | 2024 |
| Ultimate Vehicles Ltd | Extraterritorial | 2019 |
| Ultra Allied Business Services Ltd. | Health & social care | 2017 |
| Umaimination Ltd | Professional & scientific | 2026 |
| Umar Gujjar Ltd | Wholesale & retail | 2026 |
| Unda Consulting Limited | Professional & scientific | 2014 |
| Unda Holdings Limited | Financial services | 2025 |
| Unda Property Limited | Professional & scientific | 2025 |
| Unipro Trades Ltd | Manufacturing | 2026 |
| Unique Caterers Ltd | Hospitality | 2024 |
| Unique-C Ltd | Households | 2021 |
| Uniquely Creative Ltd | Information & communication | 2024 |
| Unison Commerce Limited | Transport & logistics | 2020 |
| United Cars (Crawley) LLP | | 2011 |
| United Drives Ltd | Construction | 2019 |
| United Hearts Ltd | Health & social care | 2022 |
| United KAZ Logistic Limited | Transport & logistics | 2025 |
| United Minibuses and Coaches Limited | Transport & logistics | 2017 |
| United Modern Living Concept Ltd | Wholesale & retail | 2016 |
| United NE Ltd | Real estate | 2025 |
| Unity Allstars | Arts & recreation | 2015 |
| Unity Allstars Trading Ltd | Wholesale & retail | 2015 |
| Unity Broadband Ltd | Financial services | 2002 |
| Unity Cars Limited | Wholesale & retail | 2026 |
| Univanta Ltd | Wholesale & retail | 2025 |
| Universal Accessories Limited | Wholesale & retail | 2016 |
| Universal Applied Coatings Limited | Other services | 1984 |
| Universal Freight Network Ltd | Transport & logistics | 2026 |
| Universe Projects Ltd | Construction | 2023 |
| Unlimited Buffet Ltd | Hospitality | 2018 |
| Unlimited Site Solutions Ltd | Construction | 2026 |
| Unlock Investment Ltd | Financial services | 2021 |