| THE Village for Mums CIC | Education | 2026 |
| THE Village Store (P) Ltd | Wholesale & retail | 2025 |
| THE Way Coffee House Limited | Wholesale & retail | 2022 |
| THE Wheatsheaf (Leighton Buzzard) Ltd | Hospitality | 2012 |
| THE Wheatsheaf Maids Moreton Limited | Hospitality | 2024 |
| THE Woodside Public House Ltd | Hospitality | 2021 |
| THE Workhouse Dunstable CIC | Wholesale & retail | 2022 |
| Thelc.Consulting Ltd | Professional & scientific | 2022 |
| Theo's Future Ltd | Wholesale & retail | 2026 |
| Theodore Global Limited | Manufacturing | 2018 |
| Thepeachbeetle Ltd | Professional & scientific | 2007 |
| THERE2CARE Limited | Health & social care | 2015 |
| Thermal Angell Ltd | Construction | 2017 |
| Thesha Foods Ltd | Wholesale & retail | 2024 |
| Thiink Property Investments Limited | Real estate | 2024 |
| Thinkquestors Ltd | Wholesale & retail | 2022 |
| Third EYE Creative Ltd | Arts & recreation | 2017 |
| Thirsty Bear Events Ltd. | Hospitality | 2019 |
| THL UK and Ireland Limited | Transport & logistics | 2001 |
| Thomas Curtis Consulting Ltd | Professional & scientific | 2024 |
| Thomas Dane Limited | Wholesale & retail | 1994 |
| Thomas Haulage Transport Ltd | Transport & logistics | 2024 |
| Thoughtful Care Limited | Health & social care | 2019 |
| Thread Limited | Extraterritorial | 2003 |
| Three Bridges Therapy Rooms Ltd | Other services | 2025 |
| Three Counties Media Bedfordshire Limited | Information & communication | 2017 |
| Three Sea Homes Ltd | Construction | 2020 |
| Three Star (Luton) Limited | Transport & logistics | 2002 |
| Thrive Psychiatry Ltd | Public administration | 2025 |
| Thunder Logistics Limited | Transport & logistics | 2020 |
| Thuraya Travel and Tourism UK Ltd | Administrative & support | 2025 |
| Thush Retail Limited | Wholesale & retail | 2020 |
| Thuvija Ltd | Wholesale & retail | 2025 |
| Thwaites, Blackwell, Bailey & Co Limited | Professional & scientific | 2008 |
| TIA TIA International Limited | Administrative & support | 2025 |
| Tiberiu Construction Ltd | Construction | 2022 |
| Tibi Novus Ltd | Construction | 2020 |
| Tical Construction Ltd | Construction | 2014 |
| Ticard Holdings Group Limited | Financial services | 2026 |
| Tick Estates Ltd | Real estate | 2025 |
| Tifosi Cyclekit Ltd | Extraterritorial | 2013 |
| Tifosi Limited | Administrative & support | 2001 |
| Tifosi UK Limited | Administrative & support | 2005 |
| Tiger Lilly Limited | Hospitality | 2018 |
| Tiger Properties 786 Ltd | Real estate | 2020 |
| Tiger's EYE (Consultancy) Ltd | Administrative & support | 2022 |
| Tigwell Fabrication Ltd | Manufacturing | 2025 |
| Tilehouse Court Management Company Limited | Households | 2006 |
| Tiles Stone & Marble Ltd | Construction | 2020 |
| Tillenger Design Ltd | Professional & scientific | 2015 |
| Time 2 Play Therapy Limited | Extraterritorial | 2015 |
| Time LS Ltd | Construction | 2013 |
| Time to Talk Counselling Services Ltd | Health & social care | 2024 |
| Timeless Treasures Ltd | Wholesale & retail | 2025 |
| Timeserve PVT Ltd | Health & social care | 2015 |
| Timofte Transport Ltd | Wholesale & retail | 2019 |
| Tinev Ltd | Transport & logistics | 2019 |
| Tini Town Ltd | Other services | 2014 |
| Tipping Transport Limited | Transport & logistics | 2010 |
| Tire Ecommerce Ltd | Wholesale & retail | 2026 |
| Tirean Services Limited | Construction | 2015 |
| Tirnari Properties Limited | Real estate | 2019 |
| Tirupati Trading Ltd | Hospitality | 2024 |
| Tism Golf CIC | Arts & recreation | 2025 |
| Titan Tech Solutions Limited | Professional & scientific | 2020 |
| Titan Tree Services Ltd | Agriculture & fishing | 2020 |
| Titanium Lime Limited | Administrative & support | 2017 |
| Tito Construction Ltd | Construction | 2026 |
| Titonu Ltd | Wholesale & retail | 2025 |
| Tiwong Limited | Information & communication | 2018 |
| TJD Services Limited | Hospitality | 2026 |
| TJM Lifting Ltd | Construction | 2019 |
| TJP Landscapes Limited | Administrative & support | 2003 |
| TLC Carewell Ltd | Health & social care | 2025 |
| TLC Skin Therapy Ltd | Other services | 2022 |
| TLC Trade Ltd | Construction | 2016 |
| TMC Quantity Surveying Consultancy Limited | Construction | 2018 |
| TNA PROPERTY25 Ltd | Real estate | 2025 |
| TNG Motors Ltd | Wholesale & retail | 2025 |
| TNI Financial Services Ltd | Professional & scientific | 2025 |
| TNI Painting and Decorating Ltd | Construction | 2025 |
| TO Gear Marketing UK Ltd | Administrative & support | 2025 |
| Toby Camplin Limited | Extraterritorial | 2004 |
| Todd's Brewery Ltd | Manufacturing | 2025 |
| Toddington Dental Surgery Ltd | Health & social care | 2018 |
| Toddington Independent Financial Advice Ltd | Financial services | 2015 |
| Toddington Private Park Limited | Administrative & support | 1964 |
| Toddington Supermarket Ltd | Wholesale & retail | 2021 |
| Together Forward C.I.C. | Information & communication | 2015 |
| Tokens and Gifts Ltd | Manufacturing | 2021 |
| Tokyo Monkey Creative Limited | Arts & recreation | 2008 |
| Tolici Services Ltd | Construction | 2023 |
| Tommy Diva Nails Ltd | Other services | 2024 |
| Toni Transport Limited | Transport & logistics | 2019 |
| Tony's Cafe Ltd | Hospitality | 2023 |
| Tooth Matters Limited | Health & social care | 2007 |
| Top Class Roofing Services Ltd | Construction | 2025 |
| Top Courier Ltd | Transport & logistics | 2020 |
| Top Dog Grooming Ltd | Other services | 2021 |
| Top Finish Construction Ltd | Construction | 2025 |