| TIP Top Window and Exterior Cleaning Limited | Administrative & support | 2025 |
| Tiplink Ltd | Information & communication | 2025 |
| Tirpanla Limited | Hospitality | 2025 |
| TJ Composites Ltd | Manufacturing | 2019 |
| TL Nails and Spa Ltd | Other services | 2025 |
| TLR Retails Group Ltd | Real estate | 2023 |
| TM at Harbour View Ltd | Health & social care | 2026 |
| TMD Paving & Landscaping Limited | Administrative & support | 2024 |
| TML Group Holdings Limited | Professional & scientific | 1999 |
| TO70 Aviation Ltd | Professional & scientific | 2020 |
| TOM Beveridge Flooring Limited | Construction | 2025 |
| Tomebite Ltd | Information & communication | 2025 |
| Tomoli Trading and Investment Limited | Real estate | 2018 |
| Toms-Pearce & Co Ltd | Hospitality | 2018 |
| Tonic Flexi Limited | Education | 2025 |
| Tool Safety Solutions Limited | Administrative & support | 2011 |
| Total TAN Ltd | Other services | 2025 |
| Totally in Touch Limited | Construction | 2017 |
| Towaframe Ltd | Wholesale & retail | 2012 |
| Town & Country Thatching Limited | Construction | 2011 |
| Town Bikes Limited | Wholesale & retail | 2014 |
| Townhill Laundrette Limited | Construction | 2016 |
| Transmakaj Ltd | Transport & logistics | 2025 |
| Treasure Properties Ltd | Real estate | 2023 |
| Tree (Tropical Research and Educational Expeditions) Limited | Professional & scientific | 2025 |
| Trevor Michael Lazenbury Limited | Professional & scientific | 1996 |
| Trevor Pope Motorcycles Limited | Wholesale & retail | 2018 |
| TRI Pack Supplies Ltd | Wholesale & retail | 1995 |
| Trinity Gateway Community Services | Education | 2010 |
| Trochiaki Tech Ltd. | Professional & scientific | 2025 |
| True Equity Estates Limited | Real estate | 2026 |
| True FIX Property Maintenance Ltd | Construction | 2026 |
| True Network Solutions Ltd | Information & communication | 2024 |
| Truly Prominent Properties Ltd | Real estate | 2024 |
| TRY US Removals Limited | Transport & logistics | 2020 |
| TTS Europe Ltd | Administrative & support | 2013 |
| TW Daniels Limited | Energy | 1998 |
| Twyford Avenue Limited | Real estate | 2017 |
| Typically Topographical Ltd | Professional & scientific | 2025 |
| Tysam Limited | Real estate | 2004 |
| Tyzzer 1 Ltd | Construction | 2020 |
| Tyzzer Ltd | Construction | 2024 |
| UK Blinds & Shutters Ltd | Professional & scientific | 2011 |
| UK Cards Ltd | Wholesale & retail | 2022 |
| UK Civil and Marine Engineering Ltd | Construction | 2016 |
| UK Compliance Consultant Limited | Professional & scientific | 2023 |
| UK RUG Specialist Limited | Wholesale & retail | 2016 |
| Ultimaterenovators Ltd | Construction | 2024 |
| Umbra Lettings Ltd | Real estate | 2019 |
| Uni-Tech Engineering Solutions Ltd | Manufacturing | 2021 |
| Uni-Trim Plastics Ltd | Wholesale & retail | 2007 |
| Unique Carpentry and Building Services Limited | Construction | 2010 |
| Unis Hampshire Ltd | Other services | 2025 |
| Unit 12 Martial Arts Limited | Education | 2024 |
| United Lettings and Property Management Ltd | Real estate | 2010 |
| Unity Projects & Installations Limited | Information & communication | 2025 |
| Universal Development Hampshire Ltd | Construction | 2015 |
| Universal Golf Limited | Professional & scientific | 2018 |
| Universconstruct Limited | Manufacturing | 2016 |
| Unknown Events Ltd | Arts & recreation | 2013 |
| Unseen Engineering Ltd | Professional & scientific | 2022 |
| Utrinque Paratus Limited | Financial services | 2024 |
| UXO Groundworks Ltd | Professional & scientific | 2020 |
| Uxog Holdings Ltd | Hospitality | 2026 |
| V & K Hudson Property Ltd | Real estate | 2026 |
| Val&Flo Limited | Real estate | 2025 |
| Van Junkies Ltd | Wholesale & retail | 2020 |
| Vanguard Premier Services Ltd | Wholesale & retail | 2018 |
| Vantage Asset & Commercial Finance Ltd | Financial services | 2026 |
| Vantage Telecom Limited | Information & communication | 2020 |
| Vantix Technologies Limited | Professional & scientific | 2019 |
| VAW Group Limited | Arts & recreation | 2025 |
| Vector Aerospace International Limited | Manufacturing | 2007 |
| Vectorgate Limited | Information & communication | 2026 |
| VEL DAS Retail Ltd | Wholesale & retail | 2026 |
| Velokru Ltd | Wholesale & retail | 2025 |
| Velter Drone Brigade Limited | Public administration | 2024 |
| Vespasia Ltd | Wholesale & retail | 2004 |
| Vested Impact Ltd | Information & communication | 2019 |
| VESTRY8 Limited | Households | 2019 |
| Vibish Forecourts Limited | Wholesale & retail | 2020 |
| Victory Machine Holdings Limited | Construction | 2003 |
| Victory Machine Tools Limited | Professional & scientific | 2002 |
| Vidhulya Foods Ltd | Hospitality | 2025 |
| Viha Utsav Private Limited | Wholesale & retail | 2023 |
| Virm Builders Ltd | Construction | 2019 |
| Visual Assets Consultancy Limited | Professional & scientific | 2018 |
| Vita Aura Ltd | Wholesale & retail | 2025 |
| Vitruvian Insights Limited | Information & communication | 2024 |
| VND Enterprise Limited | Wholesale & retail | 2019 |
| Vnote Ltd | Wholesale & retail | 2018 |
| VOL DU Papillon Limited | Wholesale & retail | 2018 |
| Volkswriter (UK) Limited | | 1991 |
| Volparts Ltd | Wholesale & retail | 2018 |
| Vopson Group Ltd | Information & communication | 2023 |
| Vortex Containment Technologies Ltd | Manufacturing | 2023 |
| VR Care Solutions Hampshire Ltd | Administrative & support | 2025 |
| VS & Co. Limited | Professional & scientific | 2025 |
| W.D. O'Neill Builder Ltd | Construction | 2005 |
| Wade Build Limited | Construction | 2013 |