| THE Lyndon Cook Company Ltd | Wholesale & retail | 2012 |
| THE Magic Torch Collective Ltd | Professional & scientific | 2021 |
| THE Manor Bar & Barbers Limited | Other services | 2021 |
| THE Mirror Social Ltd | Hospitality | 2022 |
| THE Monday Club PR Ltd | Professional & scientific | 2025 |
| THE MUM Network Ltd | Arts & recreation | 2025 |
| THE Nothing Productions Limited | Information & communication | 2013 |
| THE Omega Centre Management Company Limited | Households | 1989 |
| THE Ordinary Company Ltd | Arts & recreation | 2022 |
| THE Outhouse Barbershop Ltd | Other services | 2022 |
| THE Pacha Project CIC | Education | 2026 |
| THE PCB Hub Global Limited | Professional & scientific | 2026 |
| THE Pool House Sandy LLP | | 2024 |
| THE Professional Monitor Company Limited | Administrative & support | 1997 |
| THE Regen Initiative Limited | Manufacturing | 2024 |
| THE Regular Payments Marketing Company Limited | Financial services | 2024 |
| THE Safeguarding Scene Ltd | Health & social care | 2025 |
| THE Sawi Group International and Holdings Partnership Limited | Wholesale & retail | 2025 |
| THE Shuttleworth Precision Farming Alliance Ukeig | Agriculture & fishing | 1996 |
| THE Snack Smith Limited | Hospitality | 2023 |
| THE Solutions Nest Limited | Wholesale & retail | 2025 |
| THE Support Room Ltd | Professional & scientific | 2013 |
| THE Tweener Ltd | Wholesale & retail | 2020 |
| THE Venue Biggleswade Ltd | Hospitality | 2025 |
| THE Victoria Practice Properties Limited | Real estate | 2013 |
| THE Vintage Avenue Salon Ltd | Other services | 2016 |
| THE Weatherley Centre Limited | Other services | 1992 |
| THE Wheatsheaf (Biggleswade) Ltd | Hospitality | 2026 |
| THE Willow Tree Canine Daycare Limited | Other services | 2015 |
| THE Windmill Clinic Ltd | Health & social care | 2015 |
| THE Window Place Limited | Construction | 2023 |
| Thebeeshouse Limited | Information & communication | 2010 |
| Thedecimalplace.Com Limited | Administrative & support | 2003 |
| THEMADE4U Limited | Wholesale & retail | 2015 |
| Themed Lucky BAG Company Ltd | Wholesale & retail | 2025 |
| Therapy and Counselling Ltd | Real estate | 2016 |
| Think Make Create Limited | Information & communication | 2014 |
| Thinking Paws Ltd | Other services | 2021 |
| Thirty Media Limited | Information & communication | 1999 |
| Thomas Strategic Retail Solutions Ltd | Professional & scientific | 2019 |
| Thomas Waterproofing Ltd | Construction | 2018 |
| Three Point Edit Limited | Information & communication | 2014 |
| Thurston's Construction Services Ltd | Construction | 2024 |
| Thurston's Group Services Ltd | Financial services | 2024 |
| Thurston's Mechanical Services Ltd | Construction | 2024 |
| Tibbo Consultancy Ltd | Professional & scientific | 2024 |
| Tidal Creative Limited | Information & communication | 2010 |
| Tilehouse Pianos Limited | Wholesale & retail | 2019 |
| Tilehouse Tunings Limited | Other services | 2019 |
| Timac Engineering Limited | Professional & scientific | 2023 |
| Time Fork Media Limited | Professional & scientific | 2023 |
| Timewise Drains Ltd | Water & waste | 2018 |
| Timstel Ltd | Information & communication | 2026 |
| Tiny Gourmet Ltd | Wholesale & retail | 2025 |
| TJG Arboricultural Services Ltd | Professional & scientific | 2018 |
| TMB Estates Limited | Real estate | 2018 |
| TMD Associates Limited | Information & communication | 2003 |
| Tokskazeem Limited | Professional & scientific | 2023 |
| Tolah Ltd | Wholesale & retail | 2022 |
| Tonto Property Services Ltd | Real estate | 2024 |
| Tony Prosser Roofing Ltd | Construction | 2021 |
| Totallconstruct Ltd | Construction | 2025 |
| Trace Air Limited | Construction | 2019 |
| Trace Fire Protection Limited | Construction | 2025 |
| Trakehner Breeders' Fraternity | Other services | 2000 |
| Transforming Technology Ltd | Information & communication | 2022 |
| Trashcan Inc Ltd | Arts & recreation | 2024 |
| Travel Hotels Network Limited | Professional & scientific | 2019 |
| Trim TV Limited | Information & communication | 2015 |
| Triniteè Property Investment Ltd | Real estate | 2020 |
| Triton Wave Services Limited | Professional & scientific | 2025 |
| Trotter Consultancy LLP | | 2022 |
| Truesilver Marketing Limited | Professional & scientific | 2020 |
| TT Couriers Limited | Transport & logistics | 2009 |
| Ttasa Limited | Health & social care | 2019 |
| Ttsquare Ltd | Construction | 2026 |
| Tulor Ltd | Wholesale & retail | 2021 |
| Turner Legg Consulting Ltd | Professional & scientific | 2004 |
| Tuske Ltd | Information & communication | 2015 |
| TW Plumbing Services Ltd | Construction | 2009 |
| Twenty Thirteen Ltd | Arts & recreation | 2018 |
| Twin Oaks Architecture Ltd | Professional & scientific | 2023 |
| Ugmj Limited | Professional & scientific | 2020 |
| UK Circle Engineering Limited | Professional & scientific | 2025 |
| UK Geofix Survey Supplies Limited | Administrative & support | 2026 |
| Ultimel Limited | Financial services | 2019 |
| Uni-Snacks Limited | Hospitality | 2012 |
| Unifoods (U.K.) Limited | Wholesale & retail | 2023 |
| Unifoods Europe Limited | Wholesale & retail | 2021 |
| Unifoods Limited | Wholesale & retail | 2023 |
| Unisnacks (Food) Ltd | Wholesale & retail | 2015 |
| Unisnacks Europe Ltd | Manufacturing | 2006 |
| Unisnacks Exports Limited | Wholesale & retail | 2022 |
| Unisnacks Global Limited | Wholesale & retail | 2022 |
| Unisnacks International Limited | Wholesale & retail | 2019 |
| Unisnacks Trading Limited | Wholesale & retail | 2022 |
| Universal Lifting Pins Ltd | Manufacturing | 2010 |
| Unlock Properties Ltd | Households | 2020 |
| Urban Chef Ltd | Information & communication | 2013 |
| Urban Recyling Limited | Extraterritorial | 2023 |