| TAG Gold Limited | Wholesale & retail | 2024 |
| Taggart Asset Group Ltd | Real estate | 2026 |
| Taha Cars Ltd | Wholesale & retail | 2025 |
| Tahlah Limited | Wholesale & retail | 2019 |
| Taicaan Technologies Limited | Manufacturing | 2001 |
| Taifa Enterprise Limited | Hospitality | 2014 |
| Tailor Made Block Management Ltd | Real estate | 2025 |
| Tailored Content Ltd | Arts & recreation | 2022 |
| Tailored Healthcare Ltd | Health & social care | 2025 |
| Tailoredsilicon Limited | Information & communication | 2025 |
| Tails Creative Ltd | Professional & scientific | 2020 |
| Taine Holdings Limited | Financial services | 2020 |
| Taine Properties Limited | Real estate | 2023 |
| TAJ Autotech Ltd | Manufacturing | 2013 |
| TAJ Chauffeurs Limited | Transport & logistics | 2017 |
| TAJ Groups Ltd | Professional & scientific | 2015 |
| TAJ Lettings Limited | Real estate | 2025 |
| TAJ Medical Supplies Ltd | Wholesale & retail | 2020 |
| TAJ MOT Station Ltd | Wholesale & retail | 2023 |
| TAJ Prestige Cars Ltd | Administrative & support | 2011 |
| TAJ Travel Agents Ltd | Administrative & support | 2022 |
| TAJ Tyres & Repairs Ltd | Wholesale & retail | 2010 |
| TAJ Tyres Limited | Wholesale & retail | 2004 |
| Takadh Capital Ltd | Real estate | 2023 |
| Takadh Management Ltd | Real estate | 2025 |
| Take 1 Construction Ltd | Construction | 2023 |
| Take 2 Motorcycles Ltd | Wholesale & retail | 2011 |
| Take a PEW Ltd | Education | 2025 |
| Take Aways Service TA Super Pizza Limited | Hospitality | 2026 |
| Take K Ltd | Transport & logistics | 2019 |
| Take the First Steps Limited | Other services | 2016 |
| Taketechs Ltd | Information & communication | 2025 |
| Takhar QA Solutions Ltd | Information & communication | 2016 |
| Talbot Accounting Solutions LLP | | 2021 |
| Talbot-Jones Educational Consultancy Ltd | Education | 2024 |
| Taleford Property Developments Limited | Real estate | 1989 |
| Talenauwa Limited | Transport & logistics | 2025 |
| Talent Avenue Ltd | Administrative & support | 2021 |
| Talent Search Limited | Administrative & support | 2018 |
| Talent Works Performance Consulting Ltd | Professional & scientific | 2010 |
| Talented App Limited | Administrative & support | 2025 |
| Talisman Safety Ltd | Professional & scientific | 2024 |
| Talisman Technology Limited | Professional & scientific | 1991 |
| Talisman Tree Care Limited | Administrative & support | 2021 |
| Talk Nerdy to ME Consultancy Limited | Professional & scientific | 2023 |
| TALK2FRANK Ltd | Extraterritorial | 2021 |
| Talkin' Media Limited | Information & communication | 2012 |
| Talking Heads (Southampton) Limited | Hospitality | 2012 |
| Tall PR Limited | Other services | 2017 |
| Talljhawkins Consulting Ltd | Information & communication | 2020 |
| Tallulah Estates Limited | Professional & scientific | 2008 |
| Tally Labs UK Limited | Information & communication | 2026 |
| Talucris Limited | Hospitality | 2025 |
| Tamaijonasa Limited | Transport & logistics | 2025 |
| Tamarisk Marine Ltd | Manufacturing | 2022 |
| Tamas and Budai Visions Ltd | Water & waste | 2024 |
| Tame & Sons Ltd | Transport & logistics | 2026 |
| Tamella Holdings Limited | Real estate | 2020 |
| Tamisa Consulting Ltd | Professional & scientific | 2005 |
| Tamsform Construction Ltd | Construction | 2025 |
| Taney Construction Limited | Construction | 2023 |
| Tanglewood Lodging Ltd | Real estate | 2019 |
| Tanglewood Property Services Ltd | Real estate | 2018 |
| Taning (Southampton) Ltd | Hospitality | 2023 |
| Taning Mini -Mart Ltd | Wholesale & retail | 2025 |
| Tanning & Beauty at Studio 7 Limited | Other services | 2000 |
| TAP CAP Ltd | Administrative & support | 2023 |
| Tapcars Ltd | Extraterritorial | 2025 |
| Tape(Uk) Ltd | Other services | 2024 |
| Tapeify Limited | Wholesale & retail | 2024 |
| Tapflo (UK) Limited | Manufacturing | 1997 |
| Tapi Tapi Limited | Manufacturing | 2019 |
| Taplin Farms Limited | Extraterritorial | 2020 |
| Taprobane Ventures UK Limited | Hospitality | 2022 |
| Taprunner Ltd | Health & social care | 2019 |
| Taqwah Mosque Trust | Education | 2024 |
| TAR Services UK Limited | Financial services | 2020 |
| Tarafdar Holdings Ltd | Extraterritorial | 2018 |
| Tarafdul Ltd | Hospitality | 2025 |
| Taratu (UK) Ltd | Wholesale & retail | 2013 |
| Taraxacum Ltd | Information & communication | 2023 |
| Targa Florio Cars Limited | Wholesale & retail | 2009 |
| Target Health Group Limited | Health & social care | 2021 |
| Target Manufacturing Limited | Manufacturing | 1998 |
| Tariq & Tariq Company Limited | Health & social care | 2024 |
| Tarlton Incorporation Ltd | Information & communication | 2022 |
| Tarnwalk (UK) Limited | Construction | 1993 |
| Tarnwalk Investments Limited | Financial services | 2026 |
| Tarnyrefurbs Ltd | Construction | 2024 |
| Taro & Sanju Limited | Hospitality | 2023 |
| Taro and Padoma Ltd | Hospitality | 2023 |
| Taro Brentwood Ltd | Hospitality | 2023 |
| Tarquin’S Coffee Shop Ltd | Manufacturing | 2025 |
| Tarsus Limited | Health & social care | 2002 |
| Tarteel Abid Ltd | Professional & scientific | 2025 |
| Task Brasil Limited | Extraterritorial | 2000 |
| Tasknowlogy Limited | Information & communication | 2016 |
| Taste Dining Company Limited | Hospitality | 2015 |
| Taste MAKERS1 Limited | Hospitality | 2023 |
| Taste of India Shirley Ltd | Hospitality | 2024 |