| Titans Construction Ltd | Extraterritorial | 2024 |
| Tiyaz Property Management Limited | Real estate | 2024 |
| TJ Sandhu Properties Ltd | Real estate | 2022 |
| TJ Service & Maintenance Ltd | Administrative & support | 2025 |
| Tj&M Enterprise Ltd | Construction | 2020 |
| TJA Electrical & Building Contractors Ltd | Construction | 2014 |
| TJA Electrical & Plumbing Wholesalers Ltd | Wholesale & retail | 2012 |
| TJB Rail Services Limited | Construction | 2014 |
| TJS AI Solutions Ltd | Information & communication | 2025 |
| TJS Vetting Limited | Professional & scientific | 2026 |
| TK Business Investments Ltd | Real estate | 2022 |
| TK Ceilings Limited | Construction | 2013 |
| TK Kent Ltd | Real estate | 2024 |
| Tkmet Ltd | Wholesale & retail | 2021 |
| TKZ Investments Limited | Health & social care | 2016 |
| TLB Solution Services Ltd | Real estate | 2023 |
| TLJ Training Solutions Ltd | Professional & scientific | 2019 |
| TLS Building Ltd | Construction | 2020 |
| Tltp Education Limited | Extraterritorial | 2018 |
| Tltp Group Limited | Extraterritorial | 2017 |
| Tltp Holdings Limited | Financial services | 2023 |
| Tltp Limited | Extraterritorial | 2018 |
| Tltp Medical Limited | Administrative & support | 2012 |
| TM Beth Ltd | Professional & scientific | 2024 |
| TM Burma Media Ltd | Information & communication | 2024 |
| TM CAD Planning and Design Ltd | Professional & scientific | 2026 |
| TM Handyman Ltd | Construction | 2025 |
| TM Kitchens Ltd | Construction | 2017 |
| TM Properties Services Ltd | Real estate | 2020 |
| TM Unibuild Ltd | Construction | 2019 |
| TM Workforce Ltd | Transport & logistics | 2026 |
| TMC Data Ltd | Information & communication | 2014 |
| TMG Dentistry Ltd | Health & social care | 2010 |
| Tmla Construction Limited | Construction | 2016 |
| TMM Sky Limited | Construction | 2024 |
| Tmtp Constructions Limited | Construction | 2021 |
| TN Transport Courier Ltd | Transport & logistics | 2019 |
| Tn&C Limited | Construction | 2016 |
| TNA Education Ltd | Education | 2024 |
| TNS 24 Ltd | Health & social care | 2011 |
| TNT Auto Giant Ltd | Wholesale & retail | 2024 |
| TNT Autos Limited | Wholesale & retail | 2022 |
| TO DIE for Limited | Arts & recreation | 2025 |
| TO P Looks Ltd | Other services | 2020 |
| Toadji Ltd | Transport & logistics | 2026 |
| Toby George Limited | Construction | 2016 |
| Toby Jake Coaching Ltd | Arts & recreation | 2025 |
| Toby's Brick Solutions Ltd | Wholesale & retail | 2025 |
| Toclair Ltd | Wholesale & retail | 2018 |
| Toddle-Inn Limited | Health & social care | 2008 |
| Toddler Sense Colchester West Ltd | Education | 2021 |
| Todef Construction Ltd | Construction | 2024 |
| Todo Robô Ltd | Wholesale & retail | 2024 |
| Tody Line Ltd | Construction | 2023 |
| Togar Carve & Craft Ltd | Construction | 2024 |
| Togar Construction Ltd | Construction | 2022 |
| Toggar Heat & Air-Con Ltd | Construction | 2021 |
| Togo PAK Ltd | Information & communication | 2024 |
| Toidem Limited | Professional & scientific | 2016 |
| TOJ Studier Ltd | Wholesale & retail | 2021 |
| Tolsworth Limited | Health & social care | 2014 |
| TOM Hawkes Lighting Ltd | Arts & recreation | 2024 |
| TOM Rennie Enterprises Ltd | Information & communication | 2025 |
| Tomaexpress Ltd | Wholesale & retail | 2018 |
| Tomas Freight Ltd | Transport & logistics | 2019 |
| Tomeda Ltd | Construction | 2021 |
| Tommot Properties Ltd | Financial services | 2022 |
| Tommy Miller Ltd | Professional & scientific | 2015 |
| Toms Properties London Limited | Real estate | 2025 |
| Toni & Favour Drylining UK Ltd | Construction | 2025 |
| Toni VAS Consultancy Limited | Administrative & support | 2026 |
| Tonichi Drylining UK Ltd | Construction | 2010 |
| Toni’S Construction Ltd | Construction | 2025 |
| Tontech Gadgets Ltd | Professional & scientific | 2023 |
| Tonu’S Drylining Ltd | Construction | 2024 |
| Tony & Lily Nails Limited | Other services | 2013 |
| Tony Buckley Ltd | Construction | 2026 |
| Tony Morrison Limited | Arts & recreation | 2003 |
| Tony Starling Limited | Administrative & support | 2013 |
| Tony Walden Limited | Wholesale & retail | 2025 |
| Tony's Restoration Ltd | Construction | 2026 |
| Tony's Tiling and Property Refurbishment Ltd | Construction | 2025 |
| TONYW23 Ltd | Professional & scientific | 2023 |
| Tools and PPE Ltd | Manufacturing | 2009 |
| TOOLS4BUILDERS Limited | Wholesale & retail | 2018 |
| TOOLS4YOU12 Limited | Wholesale & retail | 2025 |
| Toor Construction Ltd | Construction | 2013 |
| Top Cat Consultancy Services Ltd | Professional & scientific | 2014 |
| Top Class Shopfitters Ltd | Manufacturing | 2026 |
| Top Drylining Ltd | Construction | 2017 |
| Top Extract Ltd | Information & communication | 2021 |
| Top Finance Services Ltd | Professional & scientific | 2014 |
| Top Hybrid Education Limited | Education | 2025 |
| Top Nails Investments Limited | Real estate | 2024 |
| Top Pave Driveways Limited | Construction | 2020 |
| Top Peri Peri Box Limited | Hospitality | 2025 |
| Top Property Developments Limited | Real estate | 2024 |
| Top Quality Motors Ltd | Wholesale & retail | 2020 |
| Top Real Estate Ltd | Real estate | 2023 |
| Top Rental Ltd | Real estate | 2025 |