| THE Pet Detectives Limited | Administrative & support | 2005 |
| THE Pulbrew Ltd | Hospitality | 2023 |
| THE Reading Room Brockham Ltd | Hospitality | 2023 |
| THE REC Rink Ltd | Arts & recreation | 2022 |
| THE Signature Store Limited | Wholesale & retail | 2013 |
| THE Social Stylist Ltd | Extraterritorial | 2025 |
| THE Stunt Guild Ltd | Other services | 2026 |
| THE Sussex Hairdresser Ltd | Other services | 2022 |
| THE Sussex Village Homecare Service Limited | Health & social care | 2020 |
| THE Three Crowns (Sussex) Ltd | Hospitality | 2025 |
| THE Vault TCG+ Limited | Wholesale & retail | 2025 |
| THE Wellness Tree Limited | Wholesale & retail | 2008 |
| The-Octave Ltd | Education | 2021 |
| Thistledown Management Company Limited | Households | 1998 |
| Thomas Nayler Ltd | Manufacturing | 2019 |
| Tiburon Partners Limited | Financial services | 2005 |
| Tidey & Webb Limited | Construction | 1977 |
| TM Power Limited | Construction | 2014 |
| TOI Corporate Services Limited | Financial services | 1990 |
| TOM the Fishman Limited | Wholesale & retail | 2014 |
| Townhouse Farm Properties LLP | | 2019 |
| Trailmarked Ltd | Wholesale & retail | 2024 |
| Treerific Properties Ltd | Real estate | 2025 |
| Trelayne Technical Services Ltd | Professional & scientific | 2025 |
| TSO Commercial Repairs Ltd | Manufacturing | 2012 |
| TTM Heating Solutions Ltd | Construction | 2026 |
| TTN Limited | Education | 2025 |
| Tunis Sound Limited | Arts & recreation | 2013 |
| TW Pensions Consulting Limited | Financial services | 2005 |
| Two Counties Hospitality Ltd | Administrative & support | 2025 |
| Two Rooms Kitchens and Bathrooms Ltd | Manufacturing | 2019 |
| UK Engraving Services Limited | Other services | 2010 |
| UK Engraving Solutions Ltd | Wholesale & retail | 2016 |
| Untangled Craniosacral Therapy Ltd | Health & social care | 2025 |
| Urban AI Ltd | Financial services | 2015 |
| Urban Fencers Ltd | Administrative & support | 2019 |
| Urban Woodcutters Ltd | Agriculture & fishing | 2020 |
| Utility Asset Planning Limited | Professional & scientific | 2020 |
| Utility Intelligence Ltd | Information & communication | 2024 |
| Vascor Limited | Professional & scientific | 2003 |
| Vcsm Property Company Limited | Real estate | 2014 |
| Village Green Building Ltd | Construction | 2026 |
| Vintage and Classic Coach Trimming Ltd | Wholesale & retail | 2026 |
| Vintelier Furnishings Ltd | Wholesale & retail | 2026 |
| Vision Electrical Solutions Ltd | Construction | 2022 |
| Vjhm Limited | Professional & scientific | 2006 |
| VMA Dance Ltd | Education | 2021 |
| Voltedge EV Solutions Ltd | Energy | 2026 |
| Vortex Risk Ltd | Information & communication | 2023 |
| W G Tyres (Billingshurst) Ltd | Wholesale & retail | 2016 |
| W.T. Lamb & Sons Limited | Manufacturing | 1983 |
| W.T.Lamb Investments Limited | Financial services | 1956 |
| W.T.Lamb Properties Limited | Construction | 1964 |
| Wakoos CENTRE4CHILDREN Ltd | Health & social care | 2010 |
| Walkers Autotech Limited | Wholesale & retail | 2013 |
| Walthurst Ltd | Other services | 2018 |
| Weald Court (Billingshurst) Managements Limited | Administrative & support | 1973 |
| Wellers Farm Limited | Real estate | 2023 |
| Wesbart UK Limited | Manufacturing | 2000 |
| West Sussex PUB Co Ltd | Hospitality | 2025 |
| WF Livery Limited | Arts & recreation | 2023 |
| Wgmc Holdings Limited | Financial services | 2021 |
| Whistlestop Arts Community Interest Company | Arts & recreation | 2020 |
| White Summit Ltd | Construction | 2014 |
| Whittington Developments (Amberley) Limited | Construction | 2017 |
| Whittington Plumbing and Heating Limited | Construction | 2013 |
| Wildstorm PR Ltd | Professional & scientific | 2019 |
| Wildthinkerz Ltd | Information & communication | 2026 |
| Wiljan Estates Limited | Agriculture & fishing | 1943 |
| William Macgeagh Associates Limited | Real estate | 1981 |
| Willows Electrical Ltd | Construction | 2021 |
| Wisteria Interiors Ltd | Wholesale & retail | 2023 |
| WJS Electrical Services Limited | Construction | 2017 |
| Woodland Chase Estate Management Company Limited | Real estate | 2016 |
| Woodland Copse (Ifold) Management Company Limited | Households | 2008 |
| Woodstock Finance & Management Limited | | 1986 |
| Work Life Mother Limited | Professional & scientific | 2019 |
| World Cargo Limited | Transport & logistics | 1980 |
| Wrappr Ltd | Information & communication | 2021 |
| Wright Films Ltd | Information & communication | 2023 |
| WS & JB Investments Ltd | Real estate | 2020 |
| WTA Books Limited | Transport & logistics | 1980 |
| WTA Ocean Lines Ltd | Transport & logistics | 1955 |
| Wychwood (Ifold) Management Company Limited | Households | 1999 |
| Xerxes Air Vehicles Ltd | Wholesale & retail | 2025 |
| Yellowwood Tree Limited | Information & communication | 2011 |
| York UK Solutions Ltd | Transport & logistics | 2025 |
| Your Mate Mike Ltd | Construction | 2014 |
| Your-Dpo Ltd | Information & communication | 2024 |
| ZES Consultancy Services Ltd | Other services | 2017 |
| Zilan Haircut Ltd | Other services | 2025 |