| THE Old Rectory Aswarby Limited | Construction | 2016 |
| THE Old Rectory Howell Ltd | Hospitality | 2022 |
| THE Pavilion Heckington Ltd | Hospitality | 2023 |
| THE Pica Terra Group Limited | Professional & scientific | 2008 |
| THE Popcorn Lounge Ltd | Information & communication | 2019 |
| THE Purge Tattoo Studio Ltd | Other services | 2019 |
| THE Red Lion at Newton Ltd | Hospitality | 2019 |
| THE Roasting Company Limited | Manufacturing | 2005 |
| THE Robert Carre Trading Company Ltd | Education | 2015 |
| THE Robert Carre Trust | Education | 2011 |
| THE Robin Hood & Little John Limited | Hospitality | 2016 |
| THE Sassy Gift Company Ltd | Wholesale & retail | 2021 |
| THE Shake Vault Ltd | Hospitality | 2025 |
| THE Silent Academy Ltd | Wholesale & retail | 2020 |
| THE Silver KAT Limited | Professional & scientific | 2024 |
| THE Sleaford Navigation Trust | Other services | 1996 |
| THE Solo Bar Bistro Limited | Hospitality | 2024 |
| THE ST George's Foundation | Administrative & support | 2009 |
| THE Steeples Residents Management Company Limited | Real estate | 2017 |
| THE Sycamores Group Ltd | Real estate | 2025 |
| THE Tender People Ltd | Administrative & support | 2015 |
| THE Village Gardener Ltd | Administrative & support | 2026 |
| THE Vintage Workshops Ltd | Manufacturing | 2011 |
| THE Waste Specialists Limited | Water & waste | 2019 |
| THE White Bear Tattoo Company Ltd | Other services | 2015 |
| THE William Alvey School Trust | Education | 2011 |
| THE Willows Tearoom Ltd. | Hospitality | 2014 |
| THE Windmill Shop Limited | Agriculture & fishing | 2009 |
| THE Wright Glamping Limited | Hospitality | 2024 |
| THE Yard Venue Ltd | Hospitality | 2024 |
| Thealchemyroom Ltd | Hospitality | 2026 |
| Theodoros Gkomozias Limited | Health & social care | 2018 |
| Theraplate UK Limited | Agriculture & fishing | 2018 |
| Thetcgee Ltd | Wholesale & retail | 2025 |
| Thinking Outside the Box CIC | Professional & scientific | 2018 |
| Thompson & Richardson Limited | Financial services | 1998 |
| Thorncliffs Limited | Wholesale & retail | 2018 |
| Thorpe Coughlin Limited | Education | 2014 |
| Thorpe Drove Property Management Company Limited | Households | 2018 |
| Those Little Things Ltd | Wholesale & retail | 2026 |
| Tiffin & Co Bakehouse Ltd | Manufacturing | 2020 |
| Tiger Barber Limited | Other services | 2021 |
| TIM Benton Limited | Professional & scientific | 2002 |
| Titan Repair Services Ltd | Wholesale & retail | 2025 |
| TJ Bookkeeping & Accounts Ltd | Real estate | 2016 |
| TJA Property Management Ltd | Real estate | 2025 |
| TJM Contract Services Limited | Manufacturing | 2023 |
| Tlca Group Ltd | Real estate | 2015 |
| TOM K Consulting Ltd | Professional & scientific | 2023 |
| TOM Paddon Motion Ltd | Information & communication | 2025 |
| TOM Richardson Architecture Ltd | Professional & scientific | 2024 |
| TOM Whalen Plumbing & Heating Limited | Extraterritorial | 2003 |
| Tompy Enterprises Ltd | Wholesale & retail | 2016 |
| Tony's Clean Machine Limited | Administrative & support | 2025 |
| Top to Bottom Leathers Limited | Manufacturing | 2003 |
| Total Transportation Consultants Ltd | Professional & scientific | 2022 |
| Toulson Carpentry & Joinery Ltd | Construction | 2013 |
| Tourbillion Ltd | Real estate | 2025 |
| TR Software Solutions Limited | Administrative & support | 2019 |
| Trading AS Ltd | Transport & logistics | 2019 |
| Training Therapy Development Ltd | Health & social care | 2022 |
| Treeco Commodities (UK) Ltd | Wholesale & retail | 2017 |
| Trekscape Limited | Professional & scientific | 2009 |
| Trentmanor Limited | Real estate | 1986 |
| Triana Tapas Bar Ltd | Hospitality | 2024 |
| Trigger 50 Limited | Other services | 2017 |
| Triskelion Associates (UK) Ltd | Education | 2014 |
| TRP Imports Ltd | Wholesale & retail | 2015 |
| TRU Foods Ltd | Manufacturing | 2024 |
| True Accounting Ltd | Professional & scientific | 2018 |
| True Self Project Group Ltd | Professional & scientific | 2025 |
| Truology Ltd | Manufacturing | 2023 |
| Tsrm Furniture Ltd | Wholesale & retail | 2024 |
| Tsvek Consulting Limited | Professional & scientific | 2016 |
| Twelvetrees Engineering Limited | Professional & scientific | 2006 |
| UA Energy Limited | Professional & scientific | 2015 |
| UA Enterprises Limited | Professional & scientific | 2016 |
| UK Business Finance Group Ltd | Financial services | 2019 |
| UK Enterprises JW Ltd | Construction | 2024 |
| UK Sars Limited | Other services | 2016 |
| Ultimate Learning Resources Limited | Education | 2012 |
| Under the Wire Limited | Agriculture & fishing | 2025 |
| Unique Spice Takeaway Ltd | Hospitality | 2024 |
| United Fillings Group Limited | Financial services | 2021 |
| Universal Developers (UK) Limited | Construction | 2012 |
| Unpopular Recordings Limited | Information & communication | 2025 |
| UP Removals Ltd | Transport & logistics | 2019 |
| Urban Construction (Lincs) Ltd | Construction | 2021 |
| Urban Woodsmen Limited | Manufacturing | 2019 |
| Urown Ltd | Construction | 2021 |
| Utility AID Foundation | Other services | 2026 |
| Utility AID Limited | Wholesale & retail | 2002 |
| Utility Dynamics Ltd | Professional & scientific | 2025 |
| V Wright Accounting Services Ltd | Professional & scientific | 2018 |
| VA & Sons Interiors Ltd | Construction | 2014 |
| Vammer Limited | Water & waste | 2018 |
| Vams Solution Ltd | Transport & logistics | 2025 |
| VAS & Bros Catching Ltd | Agriculture & fishing | 2018 |
| Vdg-Consulting International UK Ltd | Professional & scientific | 2022 |
| Vedasa Ltd. | Education | 2015 |