| THE Lonely Club Community Interest Company | Education | 2025 |
| THE Maltings (Billingshurst) Ltd | Households | 2003 |
| THE National Youth Ballet of Great Britain | Arts & recreation | 1990 |
| THE Network South East Railway Society Limited | Transport & logistics | 2003 |
| THE Old Silk Road Trading Company Ltd | Wholesale & retail | 2016 |
| THE Poke Collectors Club Ltd | Wholesale & retail | 2025 |
| THE S Holiday Homes Limited | Real estate | 2022 |
| THE Scar Wand Limited | Health & social care | 2022 |
| THE Scholars' Network Ltd | Education | 2025 |
| THE Southdown School Trust | Education | 1999 |
| THE Sussex Yarn Collection Ltd | Wholesale & retail | 2022 |
| THE Victorian Glasshouse Company Limited | Construction | 2006 |
| THE Wilson Memorial Trust | Health & social care | 2001 |
| THE Wonky Tree Company Ltd | Construction | 2019 |
| Thomas Harding Limited | Information & communication | 2016 |
| Thorne Plant & Properties Limited | Real estate | 2020 |
| THR Venture Ltd | Construction | 2016 |
| Tibiyo Associates Limited | Information & communication | 2000 |
| Tickletec Limited | Manufacturing | 2016 |
| Tidey's Mill Management Company Limited | Households | 1990 |
| Timothy Hallin Property Ltd | Administrative & support | 2011 |
| Tipp Inns Ltd | Hospitality | 2016 |
| TN4HOSPITALITY Limited | Administrative & support | 2014 |
| Tonic Nutrition Ltd | Manufacturing | 2019 |
| Town Centre Ice Rinks Ltd | Arts & recreation | 2014 |
| Toynbee Associates Ltd | Professional & scientific | 2008 |
| Tracing the Rails Productions Ltd | Information & communication | 2025 |
| Treehouse Retreats Ltd | Hospitality | 2016 |
| Tribe Coaching Ltd | Professional & scientific | 2025 |
| Trident CDM Limited | Professional & scientific | 2022 |
| Trimari Limited | Wholesale & retail | 2025 |
| Trove Coffee Ltd | Manufacturing | 2026 |
| Turus Holdings Limited | Real estate | 2022 |
| Tyler Marketing Ltd | Professional & scientific | 2011 |
| UK III Development Ltd | Construction | 2025 |
| UK Project Consulting Ltd | Professional & scientific | 2007 |
| Uktrainingclub Ltd | Wholesale & retail | 2023 |
| Umbra CCW Limited | Health & social care | 2018 |
| Union Point Group Limited | Financial services | 2025 |
| Union Point Holdings Limited | Financial services | 2020 |
| Untitled Art Limited | Wholesale & retail | 2011 |
| VAC Events Limited | Administrative & support | 2012 |
| Valuflow Ltd | Information & communication | 2026 |
| VAULTIER7 LLP | | 2017 |
| Vespur Ltd | Professional & scientific | 2011 |
| Vicarage Mansions Management Limited | Real estate | 1995 |
| Victoria's Sponge Ltd | Hospitality | 2025 |
| Vigowood Limited | Real estate | 1986 |
| Village Flooring Brighton Ltd | Construction | 2024 |
| Virtus Limited | Wholesale & retail | 1981 |
| Vivid Live Limited | Administrative & support | 2015 |
| Vovos Better World Fund | Administrative & support | 2008 |
| VSG Capital LLP | | 2015 |
| Waldron Wealth Management Limited | Administrative & support | 2007 |
| Warp Ledger Solutions Ltd | Professional & scientific | 2020 |
| Waste Intelligence Network Ltd | Information & communication | 2026 |
| Wastebusters Worthing Ltd | Water & waste | 2024 |
| Webventurer Limited | Information & communication | 2007 |
| West Brick Solutions LLP | | 2025 |
| Weston Design Studio Limited | Professional & scientific | 2018 |
| Wests Printing Works Limited | Other services | 1961 |
| White Family Real Estate and Property Developments Limited | Real estate | 2022 |
| Whitford Estates LLP | | 2011 |
| Whytbank Services Ltd | Professional & scientific | 2012 |
| Wildcreative Limited | Professional & scientific | 2016 |
| Wilderdays CIC | Health & social care | 2023 |
| Wildout Limited | Professional & scientific | 2018 |
| Willett Technical Services Limited | Construction | 2003 |
| William Way (New Malden) Limited | Real estate | 1966 |
| Winnals Park Haywards Heath Residents Company Limited | Households | 1991 |
| Wise Pharmacovigilance and Risk Management Ltd | Professional & scientific | 2016 |
| Wizard Carpentry Ltd | Construction | 2023 |
| Wooddee Property Ltd | Real estate | 2023 |
| Woodsketch Ltd | Manufacturing | 2023 |
| Woolf Building Physics Limited | Professional & scientific | 2020 |
| X2MEDIA Ltd | Information & communication | 2022 |
| Ymum Ltd | Information & communication | 2020 |
| Young Automotive Limited | Wholesale & retail | 2005 |
| Zamzar Limited | Information & communication | 2008 |