| Tauwhare & Co Limited | Information & communication | 2004 |
| Tavern Close Management Limited | Real estate | 2021 |
| Tavern House Limited | Real estate | 2020 |
| Tax and Accounting Guru Ltd | Professional & scientific | 2024 |
| Taxeazy Ltd | Professional & scientific | 2025 |
| Taxi Messages Ltd | Transport & logistics | 2020 |
| Taxii Ltd | Transport & logistics | 2023 |
| Taxiloguk Ltd | Information & communication | 2025 |
| Taxiops Ltd | Information & communication | 2026 |
| Taxswag Limited | Professional & scientific | 2015 |
| Taxtek Cambridge Ltd | Professional & scientific | 2011 |
| TAY Services Ltd | Wholesale & retail | 2019 |
| Tayfen Residential Developments Limited | Financial services | 2018 |
| Tayfen Road Developments Ltd | Real estate | 2013 |
| Taylor Building Developments Ltd | Construction | 2014 |
| Taylor Composite Limited | Manufacturing | 2016 |
| Taylor Maid Companies Limited | Manufacturing | 2000 |
| Taylor Property (Peterborough) Ltd | Real estate | 2023 |
| Taylor Scaffolding East Anglia Limited | Construction | 2026 |
| Taylor Willmott Ceremonies Ltd | Professional & scientific | 2023 |
| Taylored Propman Ltd | Real estate | 2023 |
| Taylormlr Group Limited | Financial services | 2023 |
| Taylors Close Residents MGT. Co. Ltd | Households | 2020 |
| Taylors Lane Management Limited | Hospitality | 1991 |
| Taylors Rich Ltd | Wholesale & retail | 2020 |
| Tayvin 410 Limited | Real estate | 2009 |
| TB Core Insights Ltd | Professional & scientific | 2025 |
| Tb&B Cambridge Ltd | Wholesale & retail | 2025 |
| TBD Composites Ltd | Manufacturing | 2023 |
| TBE Advisory Ltd | Professional & scientific | 2024 |
| Tbioinformatics Ltd | Professional & scientific | 2023 |
| Tbls Property Services Ltd | Construction | 2025 |
| TBM Business Directory Limited | Information & communication | 2025 |
| TBM Fulfillment Solution UK Ltd | Transport & logistics | 2021 |
| TC Digital Ltd | Information & communication | 2016 |
| TC Trustees (Cambridge) Limited | Financial services | 2016 |
| TC TTR Limited | Professional & scientific | 2026 |
| TCB Presents Ltd | Administrative & support | 2023 |
| Tceb Limited | Professional & scientific | 2023 |
| TCH Group Limited | Hospitality | 2022 |
| Tchotchke Emporium Ltd | Wholesale & retail | 2024 |
| TCO International Diversity Management Limited | Professional & scientific | 2011 |
| TCO Limited | Information & communication | 2017 |
| TCS Care Limited | Administrative & support | 2023 |
| Tcsmm Limited | Hospitality | 2018 |
| TDA Property Ltd | Real estate | 2012 |
| TDB Aviation Ltd | Manufacturing | 2016 |
| Tdifog Limited | Professional & scientific | 2015 |
| TDJ Solutions Ltd | Financial services | 2011 |
| Teade Crest Ltd | Wholesale & retail | 2025 |
| Teak Freaks Ltd | Wholesale & retail | 2026 |
| Teakline Marine Ltd | Manufacturing | 2022 |
| Teal Vitis Limited | Wholesale & retail | 2025 |
| Team Powe Coaching Ltd | Health & social care | 2023 |
| Teamdev Ltd | Wholesale & retail | 2003 |
| Teasca Ltd | Manufacturing | 2025 |
| Tebira Ltd | Information & communication | 2007 |
| Tech CFO Limited | Professional & scientific | 2017 |
| Techboox.In Ltd | Extraterritorial | 2025 |
| Techcenta Ltd | Transport & logistics | 2024 |
| Techflip Media Ltd | Wholesale & retail | 2025 |
| Techfy.Io Ltd | Information & communication | 2026 |
| Techgc Limited | Professional & scientific | 2025 |
| Techisz Ltd | Information & communication | 2023 |
| Techmaniac Ltd | Information & communication | 2025 |
| Techmanoncall Ltd | Construction | 2022 |
| Techme Installations Limited | Construction | 2024 |
| TECHMEC2025 Ltd | Manufacturing | 2026 |
| Technex Talent Ltd | Administrative & support | 2023 |
| Technical Audit Ltd | Professional & scientific | 2018 |
| Technical Moves Limited | Administrative & support | 2005 |
| Technicedge Solutions Ltd | Manufacturing | 2026 |
| Techniquant Limited | Professional & scientific | 2010 |
| Technologia Ltd | Professional & scientific | 2008 |
| Technology Blueprint Limited | Information & communication | 1997 |
| Technology Innovation Associates Ltd | Professional & scientific | 2023 |
| Technology Innovation Consulting Ltd | Professional & scientific | 2023 |
| Technology Management Consultants Ltd | Professional & scientific | 2025 |
| Technology Online Group Ltd | Professional & scientific | 2021 |
| Technology Sciences Group Consulting Limited | Professional & scientific | 2014 |
| Technomation Ltd | Manufacturing | 2004 |
| Techops Group Limited | Information & communication | 2024 |
| Techscan Ventures Ltd | Wholesale & retail | 2026 |
| Techtonics Services Ltd | Administrative & support | 1999 |
| Teckentrup GmbH & Co. Ltd | Manufacturing | 2021 |
| Tecnov Ltd | Wholesale & retail | 2025 |
| Tedaldi Tech Aviation Ltd | Manufacturing | 2025 |
| Tee-Time Clothing Ltd | Administrative & support | 2015 |
| Teeja House Management Company Limited | Households | 2019 |
| Teejit Partners Ltd | Information & communication | 2018 |
| Teem Education Limited | Education | 1994 |
| Teemel Garments Co., Ltd | Extraterritorial | 2020 |
| Teissier Ltd | Professional & scientific | 2020 |
| Teke Hairdresser Limited | Other services | 2020 |
| Tekno Soft Limited | Information & communication | 2005 |
| Tekzol UK Limited | Energy | 2024 |
| Tela BIO, Limited | Manufacturing | 2018 |
| Tela Group Limited | Extraterritorial | 2026 |
| Telehandler Operator Ltd | Construction | 2018 |
| Telekommand Ltd | Information & communication | 2012 |