| Swallow Hill Nursery Ltd | Education | 2008 |
| Swaygun Ltd | Wholesale & retail | 2025 |
| Sweepclean Professionals Ltd | Administrative & support | 2025 |
| Swell Clean Ltd | Administrative & support | 2023 |
| SWING2GOOD Ltd | Information & communication | 2025 |
| Switchserve Limited | Manufacturing | 2009 |
| Sybersystems Limited | Information & communication | 2009 |
| Syntech Biofuel Limited | Energy | 2022 |
| T a Kitchen Installations Ltd | Construction | 2026 |
| T B Motors 2004 Limited | Wholesale & retail | 2008 |
| T MAC Environmental UK Ltd | Water & waste | 2015 |
| T Tech AV Ltd | Professional & scientific | 2015 |
| T&C Hospitality and Catering Ltd | Hospitality | 2022 |
| Tanev Holding Ltd | Construction | 2021 |
| Tangley Investments Limited | Professional & scientific | 2021 |
| TAP Transport Limited | Transport & logistics | 2019 |
| Tara Morgan Aesthetics Ltd | Health & social care | 2019 |
| Tate Barn Associates Ltd | Professional & scientific | 2025 |
| Taylor Roofing Services Limited | Construction | 2022 |
| TBH Drummond Villa Limited | Construction | 2024 |
| TBH Lincoln Limited | Real estate | 2018 |
| TCM Bridge Ltd | Education | 2026 |
| TCP Newcastle Ltd | Hospitality | 2025 |
| Tcpig Ltd | Hospitality | 2023 |
| TDL UK Group Ltd | Financial services | 2025 |
| TDM Services Ltd | Real estate | 2023 |
| Teal EYE Events Ltd | Administrative & support | 2022 |
| Technaccount Ltd | Other services | 2015 |
| Technical Assessments Ltd | Education | 2025 |
| Technical Aviation Pathways Ltd | Professional & scientific | 2024 |
| TEE Cubed Limited | Wholesale & retail | 2019 |
| Tekh Limited | Information & communication | 2019 |
| Temptation Bites and Desserts Ltd | Hospitality | 2025 |
| Teodor Iosub Limited | Transport & logistics | 2015 |
| Termtimesync Ltd | Information & communication | 2026 |
| Test Cube Cabins Limited | Extraterritorial | 2013 |
| Tethud Limited | Real estate | 2023 |
| Thackray Brown Limited | Wholesale & retail | 2020 |
| THE Artists' Publishing Company Limited | Extraterritorial | 1969 |
| THE Blossoms Leisure Park Ltd | Construction | 2019 |
| THE Butterfield Centre Limited | Health & social care | 2008 |
| THE Catering Crew Ltd. | Manufacturing | 2017 |
| THE Corn Mill (Bourne) Limited | Administrative & support | 2008 |
| THE Courtyard Bistro Ltd | Hospitality | 2024 |
| THE Furniture Courier Bourne Limited | Extraterritorial | 2024 |
| THE Himalayan Hearth Limited | Hospitality | 2026 |
| THE Hive Bourne CIC | Other services | 2025 |
| THE Horsechestnut Management Company Limited | Households | 2003 |
| THE J O Group Limited | Professional & scientific | 2003 |
| THE Leadership Alchemist Limited | Professional & scientific | 2024 |
| THE Marketing and Design Collective Limited | Professional & scientific | 2020 |
| THE Mindful Employer Ltd | Professional & scientific | 2023 |
| THE Mirrorball Connection Ltd | Education | 2026 |
| THE Naked Gunn Limited | Transport & logistics | 2020 |
| THE Paddocks (Northorpe) Management Company Limited | Households | 2005 |
| THE Party Stop Ltd | Wholesale & retail | 2022 |
| THE Pencil Portrait Artist Ltd | Arts & recreation | 2020 |
| THE SIX Bells Witham Ltd. | Extraterritorial | 2013 |
| THE Wharf (Cooke) Limited | Financial services | 2019 |
| THE Willows Home Holdings Limited | Financial services | 2021 |
| THE Willows Home Limited | Health & social care | 2009 |
| THE Wishing Well Inn Limited | Hospitality | 2014 |
| The-Bramble-Patch Limited | Education | 2026 |
| Thirty West Ltd | Wholesale & retail | 2024 |
| Thomas Mcgrath Ltd | Professional & scientific | 2023 |
| Thorondor Consultancy Ltd | Administrative & support | 2016 |
| Thread Step Ltd | Wholesale & retail | 2025 |
| Three Chimneys Group Ltd | Information & communication | 2026 |
| Thurlby Consulting Ltd | Professional & scientific | 2023 |
| Timber Displays Lincs Limited | Manufacturing | 2022 |
| Tina Sneath Property Limited | Construction | 2015 |
| TJD Smile Limited | Professional & scientific | 2022 |
| Tlrc (Radio Investments) Ltd | Information & communication | 2023 |
| TND Care Services Limited | Real estate | 2024 |
| Tnsd Holdings Limited | Financial services | 2026 |
| Toft Golf Club Limited | Arts & recreation | 2025 |
| Tomis Haulage Ltd | Transport & logistics | 2026 |
| Tool BAG Trading Limited | Wholesale & retail | 2015 |
| Top A-Team Cleaning Ltd | Other services | 2021 |
| Top HUT Pizza Ltd | Hospitality | 2020 |
| Tordoff Property Investments Ltd | Real estate | 2021 |
| Tower Equine Limited | Other services | 2013 |
| Town & Country Electrical & Security Ltd | Manufacturing | 2015 |
| Town and Country Retractable Awnings Ltd | Wholesale & retail | 2021 |
| Trade Beds Ltd | Real estate | 2026 |
| Trade Booster Ltd | Professional & scientific | 2023 |
| Trader Bank Holdings Limited | Construction | 2021 |
| Travelling the Groove Ltd | Wholesale & retail | 2020 |
| TRB Cadspex Limited | Information & communication | 2024 |
| Tremolite Surveys Ltd | Professional & scientific | 2026 |
| Trev's Tyres Limited | Wholesale & retail | 2009 |
| Triangle Development Management Limited | Households | 2022 |
| Trsw Ltd | Arts & recreation | 2018 |
| TRW Consultancy Limited | Administrative & support | 2023 |
| Turner and Hulme Limited | Real estate | 2017 |
| Tuscanor Lighting Ltd | Wholesale & retail | 2020 |
| Tutor Tree Limited | Education | 2014 |
| TVA Ltd | Financial services | 2026 |
| Tyler Bladon Practical Ethics Ltd | Administrative & support | 2021 |
| Ufford Park Cricket Club Limited | Arts & recreation | 2020 |