| Suntings Limited | Professional & scientific | 2014 |
| Supastrikers Southlincs Ltd | Arts & recreation | 2022 |
| Supplies Direct Ltd | Wholesale & retail | 2024 |
| Support Solutions Healthcare Limited | Health & social care | 2022 |
| Susilva Ltd | Agriculture & fishing | 2012 |
| Sustain Interaction Ltd | Professional & scientific | 2018 |
| Sustainable Future Investments LLP | | 2024 |
| Sustainable Services (Midlands) Ltd | Education | 2022 |
| SVS Health Limited | Health & social care | 2024 |
| Swallows Mill Management Company (Number 1.) Limited | Real estate | 1997 |
| Swallows Mill Management Company (Number 2.) Limited | Real estate | 1997 |
| Swann Underwriting LLP | | 2006 |
| Swans Lettings Limited | Real estate | 2010 |
| Sweetspot Strategic Communications Ltd. | Professional & scientific | 2019 |
| Swic UK Limited | Professional & scientific | 2004 |
| Swift Historic Racing Ltd | Wholesale & retail | 2007 |
| Swift Vehicle Projects Ltd | Administrative & support | 2021 |
| Swiftdale Limited | Mining & quarrying | 1987 |
| Swingbridge Property LLP | | 2012 |
| Swkicks Ltd | Wholesale & retail | 2025 |
| Sycamore Building Restoration Ltd | Construction | 2012 |
| Sygn Technologies Ltd | Information & communication | 2025 |
| Synamix Limited | Professional & scientific | 2013 |
| T & W Woodhead Nameco Limited | Administrative & support | 2014 |
| T B C Construction Limited | Construction | 2008 |
| T Balfe Construction Limited | Construction | 1984 |
| T Dean Associates Ltd | Professional & scientific | 2023 |
| T Sawford Design Limited | Professional & scientific | 2012 |
| T&L Event Medical Services Ltd | Health & social care | 2022 |
| T2 Garage Services Ltd | Wholesale & retail | 2010 |
| T2M Contractor Ltd | Construction | 2022 |
| Tab-Met Limited | Administrative & support | 2026 |
| Tailored Fitness Ltd | Real estate | 2019 |
| Taipan Solutions Limited | Information & communication | 2023 |
| Take Italy Ltd | Hospitality | 2023 |
| Tanner Underwriting Limited | Financial services | 2009 |
| Taprobane LK Ltd | Wholesale & retail | 2023 |
| Tarntaryn Limited | Hospitality | 2025 |
| Taurus Autos Ltd | Wholesale & retail | 2023 |
| Taurus Global Distribution Ltd | Wholesale & retail | 2025 |
| Taurus Logistics Services Ltd | Transport & logistics | 2025 |
| Taurus Vehicle Transport Limited | Transport & logistics | 2014 |
| Tax Management for Clergy Limited | Professional & scientific | 2002 |
| TB Motorhomes Ltd | Other services | 2021 |
| Tbqb Limited | Professional & scientific | 2024 |
| Tcc-Casemix Limited | Professional & scientific | 2019 |
| TCD School of Motoring Limited | Education | 2023 |
| Td&M Transport Limited | Transport & logistics | 2017 |
| Teambuilding to YOU Behaviour Consultancy and Training Limited | Education | 2025 |
| Technical Event Company Limited | Transport & logistics | 2002 |
| Technical Tyre Service Limited | Wholesale & retail | 2009 |
| Technicalshed Limited | Information & communication | 2009 |
| Techtranformation Ltd | Information & communication | 2020 |
| Techwise Services Limited | Real estate | 2021 |
| Tecpave Ltd | Construction | 2021 |
| Teibe XR Ltd | Health & social care | 2025 |
| Teignharvey Limited | Financial services | 2026 |
| Terbium Ltd | Professional & scientific | 2025 |
| Terraced Houses Limited | Real estate | 2003 |
| Terratop Workshop Ltd | Manufacturing | 2019 |
| Terrington Burchett Limited | Other services | 1995 |
| Tesa Global Ltd | Health & social care | 2026 |
| TFB Technical Limited | Professional & scientific | 2026 |
| TGF Property Ltd | Real estate | 2021 |
| Thavies Inn Underwriting Limited | Financial services | 2009 |
| Thaxoeisy Ltd | Wholesale & retail | 2021 |
| THE Aesthetics Lodge Limited | Other services | 2020 |
| THE Agile Kind Limited | Professional & scientific | 2025 |
| THE American Barn UK Ltd | Real estate | 2024 |
| THE Anchor Inn (Bourne) Ltd | Hospitality | 2013 |
| THE Angel Hotel (Grantham) Ltd | Hospitality | 2019 |
| THE Barn's, Belton, Management Company Limited | Households | 1997 |
| THE Barrack Inn Limited | Hospitality | 2026 |
| THE Beeches Marston Management Company Limited | Households | 2022 |
| THE Belton Cleaning Company Ltd | Administrative & support | 2007 |
| THE Belvoir Co Ltd | Extraterritorial | 2021 |
| THE Bigger Picture Training Company Ltd | Education | 2021 |
| THE Brownlow Arms Limited | Hospitality | 2022 |
| THE Burnished Horse Ltd | Extraterritorial | 2016 |
| THE Business Improvement Consultancy Ltd | Professional & scientific | 2022 |
| THE Bythams Cattery Limited | Other services | 2025 |
| THE Carbonplus Limited | Professional & scientific | 2026 |
| THE Christmas Cabin Limited | Wholesale & retail | 2000 |
| THE Coach Lounge Ltd | Hospitality | 2026 |
| THE Community LAB Initiative CIC | Wholesale & retail | 2024 |
| THE Composite Gate Company Ltd | Manufacturing | 2025 |
| THE Conclude Consultancy Ltd | Professional & scientific | 2010 |
| THE Craftier Cafe Ltd | Hospitality | 2025 |
| THE Crafty Ladies Limited | Manufacturing | 2025 |
| THE Cross-Swords Inn Limited | Hospitality | 2018 |
| THE Crust Bakerys LK Ltd | Transport & logistics | 2018 |
| THE Duncan & Toplis Foundation | Other services | 2022 |
| THE Equine Life Limited | Arts & recreation | 2025 |
| THE Extra Daughter Ltd | Health & social care | 2025 |
| THE Foot Health Practice (Lincolnshire) Ltd | Health & social care | 2013 |
| THE Galaxy Fish Bar Limited | Hospitality | 2003 |
| THE Good Grub Catering Co Limited | Hospitality | 2019 |
| THE Grange Sedgebrook Ltd | Hospitality | 2025 |
| THE Hair Shop by Myles Ltd | Other services | 2018 |
| THE Heating Team Limited | Construction | 2015 |