| THE Macs Farm Holdings Ltd | Financial services | 2024 |
| THE Macs Farm Limited | Agriculture & fishing | 2020 |
| THE Mindful Gardener Ltd | Professional & scientific | 2022 |
| THE Mint House Limited | Extraterritorial | 1998 |
| THE Road Compass Community Interest Company | Administrative & support | 2021 |
| THE Second Thread Hurstpierpoint Limited | Wholesale & retail | 2025 |
| THE Sussex Butterfly Gardens Ltd | Arts & recreation | 2025 |
| THE Thatched Inn Limited | Hospitality | 2003 |
| THE Twentieth Consulting Ltd | Professional & scientific | 2023 |
| THE Ultimate Space Company Britain Limited | Manufacturing | 2020 |
| Therapy West Sussex Ltd | Health & social care | 2018 |
| Thinc.Creative Ltd | Professional & scientific | 2025 |
| Third Stream Ltd | Information & communication | 2019 |
| Thompson Performance Ltd | Health & social care | 2024 |
| Thpd Ltd | Hospitality | 2017 |
| Three S Ventures Limited | Real estate | 2013 |
| Thrifted Abode Limited | Professional & scientific | 2022 |
| Tigerlily First AID Training Ltd | Education | 2024 |
| TIM Minor Ltd | Information & communication | 2014 |
| Timber Tongs Ltd | Administrative & support | 2020 |
| Timeless Treasures TCG Limited | Wholesale & retail | 2025 |
| Tiny Acre Limited | Professional & scientific | 2022 |
| Tiny Co-Op Limited | Information & communication | 2012 |
| Tiny Works Ltd | Information & communication | 2019 |
| Tiripati Hridita Property Investments Ltd | Real estate | 2002 |
| Tiripati Thravant Property Investments Ltd | Real estate | 2009 |
| TKC7 Limited | Other services | 2024 |
| TM Assessors Ltd | Wholesale & retail | 2025 |
| TMA Consultancy Ltd | Real estate | 2018 |
| Tobiasaro Limited | Other services | 2021 |
| Today Studios Ltd | Real estate | 2016 |
| TOM New Limited | Arts & recreation | 2012 |
| Tony Martin Ltd | Health & social care | 2016 |
| Tony Mciver Limited | Construction | 2008 |
| Top International Boarding Schools Ltd | Professional & scientific | 2026 |
| Total Sense Media Limited | Information & communication | 2005 |
| TP Cricket Limited | Manufacturing | 2022 |
| Track Right Equestrian Limited | Wholesale & retail | 2003 |
| Tradesping Ltd | Administrative & support | 2025 |
| Transitiq Ltd | Information & communication | 2025 |
| TREATMENTS4YOU Limited | Other services | 2015 |
| Treble Design Limited | Professional & scientific | 2007 |
| Trident Kinect Ltd | Construction | 2025 |
| Trigger Solutions Creative Limited | Information & communication | 2010 |
| Trihardtraining Ltd | Professional & scientific | 2025 |
| Trinity Court Retirement Management Company Limited | Households | 2000 |
| Triple M Trading Limited | Professional & scientific | 2008 |
| Truslers Hill Estate Limited | Agriculture & fishing | 2023 |
| Tryline Investments Ltd | Construction | 2003 |
| TRÜ Health Ltd | Hospitality | 2018 |
| Tscommerce Limited | Administrative & support | 2026 |
| Tula Development Limited | Construction | 2023 |
| Turismo Customs Ltd | Wholesale & retail | 2026 |
| Turismo Motors Ltd | Wholesale & retail | 2025 |
| TVE Models Ltd | Administrative & support | 2020 |
| Twentytwenty Street Ltd | Real estate | 2020 |
| TWH320ACADEMY Ltd | Education | 2024 |
| Twinspiration Ltd. | Manufacturing | 2013 |
| Twisted Eleven Ltd | Arts & recreation | 2016 |
| Two Tall Action Limited | Other services | 2022 |
| Tyre Express (Bognor) Limited | Wholesale & retail | 2004 |
| Tyre Express (Sussex) Limited | Wholesale & retail | 2019 |
| Tyre Express (Wholesale) Limited | Wholesale & retail | 2004 |
| U.K. Property Limited | | 2022 |
| UFO IP Ltd | Administrative & support | 2025 |
| UFO Productions Limited | Information & communication | 2026 |
| Ultimate AV Limited | Information & communication | 2006 |
| Unique New Homes Limited | Real estate | 2005 |
| UNO HOO UK Ltd | Manufacturing | 2010 |
| Unpac Ltd | Other services | 2020 |
| Upton & Partners Ltd | Information & communication | 2024 |
| V2 Survey Limited | Professional & scientific | 2014 |
| Vabali Group Limited | Manufacturing | 2019 |
| Valens Associates Limited | Professional & scientific | 1987 |
| Valley Garage Limited | Wholesale & retail | 2025 |
| Varna VD Limited | Administrative & support | 2005 |
| Vast Cars Limited | Wholesale & retail | 2013 |
| Veira Ltd | Information & communication | 2026 |
| Veldt Consulting Ltd | Professional & scientific | 2025 |
| Velusso Ltd. | Administrative & support | 2015 |
| Vendura Associates Ltd | Professional & scientific | 2015 |
| Venice Property Consultants Ltd | Professional & scientific | 2018 |
| Venusworld Ltd | Arts & recreation | 2021 |
| Versorium Healthcare Ltd | Real estate | 2023 |
| Very Colourful Jewellery Limited | Manufacturing | 2005 |
| Vieveo Limited | Professional & scientific | 2012 |
| Village Pizza Kitchen Holdings Ltd | Financial services | 2026 |
| Village Pizza Kitchen Ltd | Hospitality | 2020 |
| Vinton Enterprises Limited | Financial services | 2022 |
| Vinton Holdings Limited | Professional & scientific | 2017 |
| Violet & Violet Ltd | Professional & scientific | 2022 |
| Vislock Ltd | Information & communication | 2019 |
| Vitafusion Limited | Health & social care | 2022 |
| VLD Oral Care Ltd | Health & social care | 2023 |
| Vocall Solutions Ltd | Information & communication | 2014 |
| VPK Foodservice Ltd | Manufacturing | 2026 |
| Vrims Limited | Information & communication | 2023 |
| Vrivs Limited | Education | 2024 |
| VSB Enterprises Ltd | Wholesale & retail | 2008 |
| W Rugby Ltd | Wholesale & retail | 2022 |