| TJV Property Ltd | Real estate | 2023 |
| TK Contractors Limited | Construction | 2012 |
| TK Design Services Limited | Professional & scientific | 2009 |
| TKA Derby Limited | Wholesale & retail | 2025 |
| TKB Transport Ltd | Extraterritorial | 2022 |
| Tkboys Limited | Transport & logistics | 2026 |
| TKS Staffing Ltd | Health & social care | 2014 |
| TKT Construction Limited | Construction | 2024 |
| TKW Limited | Professional & scientific | 2002 |
| TLH Properties Ltd | Real estate | 2025 |
| TLM Group Ltd | Professional & scientific | 2025 |
| TLS Consultancy Limited | Financial services | 2023 |
| TM (Derby) Limited | Construction | 2026 |
| TM 2025 Management Limited | Administrative & support | 2022 |
| TM Eco-Cleaning Service Limited | Administrative & support | 2023 |
| TM Healthcare Services Ltd | Public administration | 2021 |
| TMA Systems Ltd | Information & communication | 2012 |
| TMA04 Ltd | Hospitality | 2019 |
| Tmas Project and Commercial Risk Limited | Extraterritorial | 2012 |
| TMC (Midlands) Limited | Manufacturing | 2005 |
| TMC Media Ltd | Information & communication | 2026 |
| TMG Southall Limited | Wholesale & retail | 2024 |
| TMK Take II Ltd | Hospitality | 2024 |
| TML Investments Limited | Real estate | 2010 |
| Tmla Limited | Education | 2014 |
| Tmrrw Limited | Professional & scientific | 2024 |
| TMS Development Ltd | Information & communication | 2018 |
| TMS Management Solutions Ltd | Real estate | 2016 |
| TMZ Parcel Ltd | Transport & logistics | 2014 |
| TN Luxe Properties Ltd | Hospitality | 2025 |
| TNH Complete Consultants Ltd | Professional & scientific | 2014 |
| TNP Bidco Limited | Financial services | 2017 |
| TNP Holdco Limited | Financial services | 2011 |
| TNP Midco Limited | Financial services | 2018 |
| TNP Topco Limited | Financial services | 2018 |
| TNT Accounting Limited | Professional & scientific | 2006 |
| TNT Sports Limited | Arts & recreation | 2022 |
| TO SEE IT NOW Ltd | Wholesale & retail | 2025 |
| TO Your Door Flooring Limited | Administrative & support | 2017 |
| Toadhole Limited | Agriculture & fishing | 2000 |
| Toast & Co Derby Ltd | Manufacturing | 2026 |
| Toastedink Ltd | Wholesale & retail | 2021 |
| Toboria Ltd | Professional & scientific | 2021 |
| Todaja Ltd | Real estate | 2025 |
| Toes Company (UK) Limited | Health & social care | 2014 |
| Toffee Homes Ltd | Real estate | 2020 |
| Toftoppy Beauty & Organics Variety Hub Limited | Wholesale & retail | 2025 |
| Together Hospitality Limited | Hospitality | 2023 |
| TOK Foods Ltd | Wholesale & retail | 2024 |
| Tokengrove Electrical Limited | Construction | 1992 |
| Tokenhouse Design Limited | Wholesale & retail | 1997 |
| TOKYO1713 Limited | Wholesale & retail | 2026 |
| Tolcarne Group Limited | Professional & scientific | 2024 |
| Tolivan Services Ltd | Administrative & support | 2025 |
| Tolmers Properties Limited | Real estate | 2012 |
| TOM Hallam Limited | Administrative & support | 2013 |
| TOM Hallam Properties Limited | Extraterritorial | 2018 |
| TOM Keegan Carpets Limited | Construction | 2012 |
| TOM Wood Racing Limited | Arts & recreation | 2013 |
| Tomarc Limited | Information & communication | 2023 |
| Tomasz Transport Ltd | Construction | 2010 |
| Tomcat Properties Ltd | Real estate | 2024 |
| Tomemi Limited | Administrative & support | 2025 |
| Tomkat Site Safety Management Ltd | Professional & scientific | 2020 |
| Tomkir Limited | Real estate | 2024 |
| Tomlinson Gateway 38 Management Limited | Real estate | 2009 |
| Tomlinson Holdings (Belper) Ltd | Financial services | 2025 |
| Tomlinson Homes Limited | Construction | 2018 |
| Tomlinson Investments Ltd | Other services | 2024 |
| Tomtech (UK) Limited | Manufacturing | 2011 |
| Tone Dazzle Enterprises Ltd | Administrative & support | 2020 |
| Tone Dazzle Ltd | Arts & recreation | 2020 |
| Toni Louise Photography Limited | Professional & scientific | 2024 |
| Tonia & Richards Ltd | Health & social care | 2012 |
| Tonic Enterprises Limited | Administrative & support | 2016 |
| Tonic Marketing Ltd | Professional & scientific | 2020 |
| Tonivra Ltd | Wholesale & retail | 2026 |
| Tony Morris Limited | Administrative & support | 2003 |
| Tony Pubs Limited | Hospitality | 2019 |
| Tony’S Property Services Limited | Administrative & support | 2019 |
| Toofan Singh Ltd | Wholesale & retail | 2016 |
| Toofany Consulting UK Ltd | Information & communication | 2020 |
| Toombs Group Limited | Financial services | 2026 |
| Toon Investments Limited | Real estate | 2023 |
| Toor Global Traders Ltd | Wholesale & retail | 2021 |
| Toor Highway Ltd | Transport & logistics | 2024 |
| Toor Transport Limited | Other services | 2021 |
| Tooth Factory Ltd | Information & communication | 2013 |
| Toots Tv's Limited | Wholesale & retail | 2023 |
| Top Boss Automotive Limited | Wholesale & retail | 2023 |
| Top Box Holdings Limited | Financial services | 2022 |
| Top Boys Haulage Ltd | Transport & logistics | 2025 |
| Top Cat Group Ltd | Wholesale & retail | 2026 |
| Top Chef Desserts Ltd | Hospitality | 2019 |
| Top Chef Five Lamps Limited | Hospitality | 2020 |
| Top Claims Management Company Ltd | Administrative & support | 2023 |
| Top Class Education Limited | Education | 2025 |
| Top Corner Ltd | Professional & scientific | 2023 |
| Top CUT Kurdish Barber Ltd | Other services | 2023 |
| Top Cutz 2 Ltd | Other services | 2023 |