| THE Happy Chickens Company Limited | Agriculture & fishing | 2009 |
| THE Happy Turkeys Company Limited | Professional & scientific | 2009 |
| THE Harrogate VET Limited | Professional & scientific | 2018 |
| THE Jewellery Studio Limited | Other services | 2004 |
| THE Joinery Fitting Company Limited | Construction | 2008 |
| THE Little Mushroom Company Limited | Agriculture & fishing | 2021 |
| THE Liverpool Vets Limited | Professional & scientific | 2017 |
| THE New Diss Corn Hall Limited | Wholesale & retail | 2010 |
| THE New Horizons Associates Limited | Professional & scientific | 2022 |
| THE Nightfair CIC | Wholesale & retail | 2026 |
| THE Oaks Wattisfield Management Company Limited | Households | 1992 |
| THE Online Letting Agents Ltd | Real estate | 2011 |
| THE Parish Growers Collective Ltd | Administrative & support | 2026 |
| THE Parrot Furniture Company Limited | Manufacturing | 2009 |
| THE Peacock Montessori Nursery Ltd | Education | 2010 |
| THE Pennoyer Centre | Hospitality | 2010 |
| THE Poppi Group of Companies Ltd | Extraterritorial | 2020 |
| THE Primitive Home Ltd | Wholesale & retail | 2021 |
| THE Quarter Bar Limited | Hospitality | 2023 |
| THE Reptile House Design & Art Direction Limited | Arts & recreation | 2004 |
| THE Resin Room Ltd | Wholesale & retail | 2026 |
| THE Rosetta Trust | Administrative & support | 2007 |
| THE Storyhouse Toys Ltd | Wholesale & retail | 2025 |
| THE Suffolk Building Company Ltd | Construction | 2020 |
| THE Swimming Pond Company Limited | Construction | 2007 |
| THE Talbot Collection Ltd | Wholesale & retail | 2020 |
| THE Tree Amigos Diss Ltd | Agriculture & fishing | 2018 |
| THE Ultimate Joint Limited | Manufacturing | 2001 |
| THE Well (Hopton) Limited | Hospitality | 2014 |
| THE Wood-Shop (Suffolk) Ltd | Manufacturing | 2021 |
| THE Wright Design (East Anglia) Limited | Administrative & support | 2002 |
| THE Wulugu Project Limited | Other services | 2005 |
| Theme Toolkit Ltd | Information & communication | 2020 |
| Thornham Estate Property Ltd | Real estate | 2017 |
| Thorrold's Ltd | Wholesale & retail | 2015 |
| Three Sisters Developments Limited | Real estate | 2003 |
| Threeways Estates Ltd | Construction | 2026 |
| Thrums Limited | Real estate | 2011 |
| Thunder Fireworks Ltd | Arts & recreation | 2023 |
| Ticket Geezer Ltd | Wholesale & retail | 2018 |
| Tiger Toroids Limited | Manufacturing | 1998 |
| Timber Windows Norfolk Limited | Construction | 2012 |
| Time 4 Vape Ltd | Wholesale & retail | 2026 |
| TIN Barn Car Storage Ltd | Transport & logistics | 2025 |
| TIR1 Limited | Manufacturing | 2013 |
| TJ Linnett Ltd | Administrative & support | 2018 |
| Toby Olie Ltd | Arts & recreation | 2017 |
| Toby Rogers Property Services Ltd | Construction | 2025 |
| Total Care 4 U Limited | Other services | 2002 |
| Tots Town Limited | Hospitality | 2023 |
| Towens Ltd | Professional & scientific | 2020 |
| Town and Country Floors Ltd | Construction | 2025 |
| Town Lees Limited | Hospitality | 2014 |
| Toxpath Consultancy Limited | Professional & scientific | 2008 |
| Track View Developments Limited | Construction | 2020 |
| Traditional English Estates Limited | Real estate | 2017 |
| Traditional English Properties Group Limited | Financial services | 2018 |
| Traditional English Properties Limited | Real estate | 1998 |
| Trailpoint Consulting & Business Services Ltd | Professional & scientific | 2025 |
| Transport Made Simple Limited | Financial services | 2024 |
| Trashdash CIC | Other services | 2025 |
| Travexa Ltd | Administrative & support | 2026 |
| Tremarran Court Limited | Real estate | 1986 |
| Tribe ALL Fitness Ltd | Arts & recreation | 2018 |
| Trkd Limited | Transport & logistics | 2026 |
| Tuck Box Limited | Hospitality | 1987 |
| Turner Creative Limited | Professional & scientific | 2011 |
| Turner Link Group Limited | Wholesale & retail | 2024 |
| Turner Link Limited | Professional & scientific | 2024 |
| TVP 3 Limited | Information & communication | 2016 |
| Twenty Five Square Centimetres Limited | Manufacturing | 2012 |
| Twenty Two Tutus Ltd | Education | 2022 |
| TWG (1857) Limited | Real estate | 2014 |
| TWG Property Limited | Real estate | 2010 |
| Twretail Limited | Wholesale & retail | 2025 |
| Twyman Aviation Ltd | Transport & logistics | 2024 |
| TZR Car & Vehicle Sales Ltd | Wholesale & retail | 2025 |
| Ubora Property Limited | Real estate | 2023 |
| UK Fire & Safety Limited | Construction | 2008 |
| Uk-Net Transport Limited | Transport & logistics | 2013 |
| Uncommon Capital Ltd | Financial services | 2022 |
| Uncommon Enterprises Ltd | Wholesale & retail | 2026 |
| United Landscapes Ltd | Administrative & support | 2025 |
| UP and Online Ltd | Information & communication | 2025 |
| Uplift Life Limited | Professional & scientific | 2022 |
| Urmi Co Limited | Hospitality | 2025 |
| Urtica Plus Ltd | Professional & scientific | 2018 |
| Utilipro Ltd | Information & communication | 2024 |
| Uttings Limited | Wholesale & retail | 2010 |
| V.K. Driving Ltd | Education | 2014 |
| Vant Limited | Real estate | 2020 |
| Velomont Limited | Manufacturing | 2021 |
| Velorate Limited | Professional & scientific | 2017 |
| Verdon Properties Ltd | Real estate | 2026 |
| VET Direct Holdings Limited | Professional & scientific | 2008 |
| VET Direct Services Limited | Wholesale & retail | 2004 |
| VET3 Equine Care Ltd | Professional & scientific | 2022 |
| Vetcutis Limited | Professional & scientific | 2003 |
| Veterinary Enterprises & Trading Limited | Professional & scientific | 1998 |
| Vettraino Property Services Limited | Other services | 2017 |