| Trinity Square (Retford) Management Ltd | Households | 2010 |
| Trio Pipeline Solutions Ltd | Wholesale & retail | 2026 |
| Truck Trader Africa Ltd | Professional & scientific | 2019 |
| True Life Stories Limited | Information & communication | 2022 |
| Trueline Exteriors Ltd | Construction | 2025 |
| Trustpak Limited | Professional & scientific | 2015 |
| Truxwick Ltd | Wholesale & retail | 2023 |
| TSM Consulting Services Ltd | Information & communication | 2019 |
| Ttny Holdings Ltd | Financial services | 2022 |
| Ttr&D Ltd | Health & social care | 2014 |
| TTT Testimonies Ltd | Health & social care | 2020 |
| Tumbleweed Hotel Ltd | Hospitality | 2026 |
| Turbine Aviation LLP | | 2022 |
| TUS (Lincs) Limited | Information & communication | 2014 |
| Tuscan Marketing Limited | Administrative & support | 1993 |
| Tuxford Renewable Energy Limited | Energy | 2014 |
| Tuzdemir Co Ltd | Hospitality | 2025 |
| TW (Nottinghamshire) Limited | Professional & scientific | 2021 |
| TW Healthcare Solutions Limited | Health & social care | 2017 |
| Tweaks and Leaks Plumbing Ltd | Construction | 2026 |
| Twin Trail Design Limited | Administrative & support | 2015 |
| Two Financial Strategies Limited | Financial services | 2013 |
| Two Rules Limited | Real estate | 2026 |
| Twoprint Ltd | Manufacturing | 2018 |
| Tyke Developments Ltd | Construction | 2021 |
| Tyke Sport Ltd | Wholesale & retail | 2014 |
| U.S. Leasing Limited | Financial services | 2006 |
| UAB Construction Ltd | Construction | 2019 |
| Uavity Limited | Manufacturing | 2024 |
| UFS Protects UK Ltd | Manufacturing | 2017 |
| UK & Ireland Holdings Limited | Professional & scientific | 2015 |
| UK & Ireland Insurance Services Limited | Financial services | 1993 |
| UK Chicken Ltd | Hospitality | 2020 |
| UK Farm Agri Ltd | Wholesale & retail | 2024 |
| UK Pet Portraits Ltd | Manufacturing | 2020 |
| UK Pizza Retford Ltd | Hospitality | 2026 |
| UK Secondary Glazing Limited | Construction | 2018 |
| UK Sharpening Service Ltd | Other services | 2016 |
| UK T-Power 2 Limited | Financial services | 2021 |
| UK T-Power Management Limited | Financial services | 2023 |
| UK Transition Power Limited | Financial services | 2021 |
| Uksd Developments Ltd. | Construction | 2017 |
| Ultimate Hideaways Ltd | Households | 2021 |
| Ultimate Paving Retford Ltd | Construction | 2017 |
| Unified Electrical Limited | Construction | 2026 |
| United Civils Limited | Construction | 2024 |
| United React Limited | Construction | 2026 |
| Unity Coaches Ltd | Transport & logistics | 2016 |
| Universal Exports Worldwide Ltd | Financial services | 2025 |
| Universal Supplies (U.K.) Limited | Wholesale & retail | 2024 |
| Unlimited Ground Care Limited | Manufacturing | 2017 |
| Upspring IT Consulting Limited | Information & communication | 2016 |
| Upspring Recruitment Ltd | Administrative & support | 2018 |
| V J a Brickwork Ltd | Construction | 2015 |
| Vahlen Legal Ltd | Professional & scientific | 2026 |
| Van Dijk FEM Engineering UK Limited | Professional & scientific | 2017 |
| Vanson Guitar Parts Ltd | Wholesale & retail | 2019 |
| Vanta Growth Ltd | Professional & scientific | 2026 |
| Vehicle Rescue Network Limited | Financial services | 2008 |
| Velocity Fibre Ltd | Information & communication | 2025 |
| Vertex-Tuning Ltd | Professional & scientific | 2023 |
| Vertrek Ltd | Manufacturing | 2023 |
| Viamyrtus Limited | Real estate | 2024 |
| Vibrator Ltd | Wholesale & retail | 2010 |
| Victoria Covell Interiors Limited | Professional & scientific | 2021 |
| Virluci Ltd | Information & communication | 2025 |
| Vistech Solutions Limited | Administrative & support | 2014 |
| Vita Rustica CIC | Health & social care | 2023 |
| Vital Soul Works Ltd | Education | 2022 |
| Vitalpoint Solutions Ltd | Professional & scientific | 2010 |
| Vivitech Limited | Information & communication | 1993 |
| Vivo Consulting Limited | Professional & scientific | 2023 |
| Voodoo Source Ltd | Information & communication | 2018 |
| VU Nails Spa Ltd | Other services | 2024 |
| W & Bros Limited | Manufacturing | 2017 |
| W a & F Macdonald Limited | Real estate | 2022 |
| W E Barton & Sons Limited | Financial services | 2020 |
| W E Barton Limited | Agriculture & fishing | 1997 |
| W Goods Sales Ltd | Wholesale & retail | 2024 |
| W Interior Painting & Design Ltd | Construction | 2021 |
| W.E. Bingham (Opticians) Limited | Real estate | 1955 |
| W.R.F. & Sons Logistics Limited | Transport & logistics | 2014 |
| WAG N Bone Groomers Ltd | Other services | 2022 |
| Waggy Tail Farm Boarding LLP | | 2024 |
| Waggy Tail Farm Limited | Arts & recreation | 2017 |
| Walker Plant Services Limited | Manufacturing | 2003 |
| Warren Enterprises Ltd | Financial services | 2020 |
| Watersmeet (Retford) Management Company Limited | Households | 2005 |
| Wayside Farm CS Ltd | Hospitality | 2023 |
| WDH Livestock Limited | Agriculture & fishing | 2024 |
| Wdrtech Limited | Administrative & support | 2014 |
| WE Caan Ltd | Hospitality | 2017 |
| WE KIT Limited | Wholesale & retail | 2018 |
| WE Love Sales Limited | Administrative & support | 2017 |
| Weareerth Ltd | Wholesale & retail | 2023 |
| Weightman Property Holdings Limited | Real estate | 2025 |
| Wellman Booth Limited | Professional & scientific | 2000 |
| Wellness With Sally Ltd | Health & social care | 2023 |
| West Burton B Limited | Energy | 2020 |
| West Retford Hotel Limited | Hospitality | 2005 |