| Trading Cards Gainsborough Ltd | Wholesale & retail | 2022 |
| Transport Solutions (Gains.) Ltd | Wholesale & retail | 2017 |
| Treasures of the Road Ltd | Wholesale & retail | 2021 |
| Treehouse Property Developments Ltd | Real estate | 2020 |
| Trenchless Vision Limited | Professional & scientific | 2025 |
| Trent Approach Management Company Limited | Households | 2004 |
| Trent Nursing Ltd | Professional & scientific | 2015 |
| Trent Plastics [Fabrications] Limited | Manufacturing | 2002 |
| Trent Valley Gliding Club Limited | Arts & recreation | 1977 |
| Trentside Construction Ltd | Construction | 2019 |
| Trepko (UK) Limited | Manufacturing | 1990 |
| Trident Brickwork Contractors Ltd | Construction | 2017 |
| Trigger Happy Games Ltd | Wholesale & retail | 2016 |
| Trigon Property Ltd | Real estate | 2024 |
| Trinity Chef Limited | Hospitality | 2022 |
| Trinity Church Furniture Limited | Wholesale & retail | 2017 |
| Trinity Fast Fit Ltd | Wholesale & retail | 2025 |
| Triton Grey Limited | Manufacturing | 2013 |
| Triune Global Trading Ltd | Wholesale & retail | 2018 |
| Truck 'N' Tuck Ltd | Hospitality | 2025 |
| Trussler Farriery Services Limited | Other services | 2003 |
| Trusted Steps Childrens Services Ltd | Health & social care | 2024 |
| TS & H Limited | Hospitality | 2020 |
| TS4L Limited | Extraterritorial | 2019 |
| TT Electrical Northwest Ltd | Construction | 2024 |
| TTN Services UK Limited | Information & communication | 2022 |
| Turfgrass Consultancy Ltd | Agriculture & fishing | 2025 |
| Turks Trading Ltd | Wholesale & retail | 2020 |
| Turners Finance Ltd | Financial services | 2019 |
| Twinstream Systems Limited | Administrative & support | 1993 |
| Twintekk Limited | Manufacturing | 2024 |
| Twojays Property Ltd | Real estate | 2024 |
| TY Harris Racing Ltd | Other services | 2023 |
| Typhupandu Limited | Real estate | 2016 |
| Tyson’S Sweet Treats Ltd | Hospitality | 2025 |
| Ubique Cycles Ltd | Manufacturing | 2021 |
| Ubique Wall TIE & Damp Proof Specialists Ltd | Construction | 2023 |
| Ukfrenzy Media Limited | Information & communication | 2010 |
| Ultimate Aluminium Ltd | Manufacturing | 2022 |
| Ultimate Gloves Ltd | Other services | 2023 |
| Ultimate Graphics Limited | Other services | 2023 |
| Ultimate Plant & Agricultural Services Limited | Administrative & support | 2021 |
| Uncommon Ground Fitness Co Ltd | Arts & recreation | 2025 |
| Unhinged Limited | Manufacturing | 2018 |
| United Parts Ltd | Other services | 2002 |
| Uplead Consulting Ltd. | Professional & scientific | 2022 |
| Urban Craftology Ltd | Hospitality | 2023 |
| Valenir-Designs Ltd | Professional & scientific | 2024 |
| Van Creations Limited | Wholesale & retail | 2018 |
| Vard Industrial Ltd | Manufacturing | 2026 |
| Vardo Intelligent Planning Services Limited | Professional & scientific | 2017 |
| Vault Rights Ltd | Information & communication | 2025 |
| Vehicle Glass and Glazing Ltd | Wholesale & retail | 2024 |
| Venandi Canem Ltd | Wholesale & retail | 2025 |
| Veneers Online Limited | Wholesale & retail | 2011 |
| Veniscasa Ltd | Information & communication | 2024 |
| Venture Associates Ltd | Administrative & support | 2018 |
| Venture Phoenix Ltd | Real estate | 2014 |
| Veridiant Unlimited | Financial services | 2025 |
| Veritex Limited | Professional & scientific | 2010 |
| Vero Recruitment Group Limited | Other services | 2019 |
| Vertidrain Hire Co. Limited | Agriculture & fishing | 2003 |
| Vickers Neal Recruitment Solutions Limited | Other services | 2006 |
| Villiers Classics Limited | Wholesale & retail | 2016 |
| Vince Kidd Limited | Other services | 2024 |
| Vinci Medical Communications Ltd | Professional & scientific | 2025 |
| Vinwood Limited | Construction | 1981 |
| Vision Project Services (UK) Limited | Administrative & support | 2020 |
| Vitality Skin Ltd | Other services | 2025 |
| Vmsc Ltd | Health & social care | 2016 |
| Voidmoon Ltd | Wholesale & retail | 2025 |
| Vopos Limited | Real estate | 2024 |
| Vorbo Interiors Ltd | Wholesale & retail | 2022 |
| VOX Corporation Limited | Professional & scientific | 2017 |
| Vulcan Bossit Ltd | Professional & scientific | 2011 |
| W Barratt & Sons Limited | Agriculture & fishing | 2008 |
| W J S Real Estate Limited | Real estate | 2022 |
| W. & A.C. Rose (Farms) Limited | Agriculture & fishing | 1984 |
| W. Carter and SON (Farms) Limited | Agriculture & fishing | 1976 |
| W. H. Strawson (Notts.) Limited | Agriculture & fishing | 1968 |
| W.& H.Jackson Limited | Agriculture & fishing | 1955 |
| W.B.Rylatt and Sons Limited | Agriculture & fishing | 1965 |
| W.G.D. Plumbing & Heating Limited | Construction | 2005 |
| W.H. Strawson (Notts.) Holdings Limited | Financial services | 2018 |
| WAC Auctions Ltd | Wholesale & retail | 2021 |
| Walkers Walls and Floors Ltd | Construction | 2014 |
| Wallace & Co Property Management Limited | Real estate | 2014 |
| Wallace & Dough Limited | Hospitality | 2026 |
| Wallflow Limited | Manufacturing | 2025 |
| Walnut Field RMC Ltd | Households | 2025 |
| Walton of Gainsborough Ltd | Hospitality | 2025 |
| Wan&Onlee Limited | Professional & scientific | 2024 |
| Warden Farming Company Limited | Agriculture & fishing | 1965 |
| Warm Energy Group Limited | Construction | 2023 |
| Warm Flooring Limited | Construction | 2009 |
| Warmatex Ltd | Construction | 2023 |
| Warren Vale Construction Limited | Construction | 2012 |
| Waste Recycling and Destruction Limited | Water & waste | 2008 |
| Waterways Cottage Ltd | Real estate | 2026 |
| Watkinson Securum Ltd | Administrative & support | 2022 |