| T Malik Pharma Ltd | Wholesale & retail | 2026 |
| T Millar Ltd | Construction | 2022 |
| T P B Foods Limited | Manufacturing | 2003 |
| T Prime Properties Ltd | Financial services | 2024 |
| T R Earl Ltd | Professional & scientific | 2026 |
| T S Consultants Ltd | Professional & scientific | 2018 |
| T Turner Transport Ltd | Transport & logistics | 2025 |
| T&G Compliance & Safety Limited | Education | 2018 |
| T&K Cornerstone Estates Ltd | Real estate | 2025 |
| T&L Properties Ltd | Real estate | 2017 |
| T&S Electrical Services Ltd | Construction | 2023 |
| T&S Mobile & Vape Ltd | Wholesale & retail | 2021 |
| T&Ts Trading Ltd | Wholesale & retail | 2022 |
| T-Babs Care Limited | Health & social care | 2024 |
| T-Tutor Ltd | Education | 2026 |
| T. Bleasdale (Horwich) Limited | Extraterritorial | 1947 |
| T. Connolly (Carpet Fitter) Ltd | Construction | 2005 |
| T. H. Haslam & Co. (Footwear) Limited | Wholesale & retail | 1976 |
| T. Patankar Limited | Health & social care | 2014 |
| T. Robinson & Sons (Bolton) Limited | Administrative & support | 2013 |
| T. White Structural Services Limited | Administrative & support | 2007 |
| T.C. Components Limited | Wholesale & retail | 1983 |
| T.D.S Worcester Ltd | Other services | 2019 |
| T.E.Computing Ltd | Information & communication | 2010 |
| T.F. Daluta Limited | Real estate | 2018 |
| T.H. Stanley & Co., Limited | | 1979 |
| T.I.M Building and Maintenance Limited | Construction | 2016 |
| T.Laraman Surfacing Limited | Construction | 2013 |
| T.P.S. (Investments) Ltd | Real estate | 2006 |
| T.W.Sampson & Co.,Limited | Wholesale & retail | 1945 |
| T2 Brands Limited | Wholesale & retail | 2024 |
| T4 Physio Limited | Health & social care | 2020 |
| T4TRADEUK Ltd | Wholesale & retail | 2026 |
| T9 Sales Ltd | Wholesale & retail | 2025 |
| TA Contractor Ltd | Public administration | 2024 |
| TA Property Services Limited | Real estate | 2021 |
| TA Vision Limited | Health & social care | 2024 |
| Tablespace Limited | Information & communication | 2022 |
| Tabley Limited | Administrative & support | 2017 |
| Tabss Properties Ltd | Real estate | 2023 |
| Tactic Sport UK Limited | Wholesale & retail | 2020 |
| TAD Invest Ltd | Construction | 2018 |
| Tadd Ltd | Wholesale & retail | 2022 |
| Tade Properties Limited | Real estate | 2021 |
| Tade Services Limited | Professional & scientific | 2020 |
| Tadeem General Trading UK Ltd | Wholesale & retail | 2023 |
| TAE Accountancy Limited | Professional & scientific | 2016 |
| Taem Ltd | Real estate | 2013 |
| TAG Forklift Truck Services Limited | Administrative & support | 2004 |
| Taha Origins Ltd | Wholesale & retail | 2021 |
| Tahira Medics Ltd | Health & social care | 2024 |
| Taiba Properties Limited | Households | 2024 |
| Taifa Cocktails Ltd | Wholesale & retail | 2024 |
| Tailor Associates Limited | Information & communication | 2022 |
| Tailor Made Fabrications Limited | Manufacturing | 2009 |
| Tailor Made Mats Ltd | Wholesale & retail | 2013 |
| Tailor Maid (NW) Ltd. | Wholesale & retail | 2006 |
| Tailor Swiftly Ltd | Other services | 2024 |
| Tailored Consulting Services Ltd | Administrative & support | 2009 |
| Tailored Education Ltd | Education | 2012 |
| Tailored Optics Ltd | Health & social care | 2018 |
| Tails & ALE Limited | Hospitality | 2017 |
| Taiping Limited | Real estate | 2016 |
| TAJ Driving School Ltd | Education | 2024 |
| Tajarpro Ltd | Wholesale & retail | 2025 |
| Tajwala Ltd | Hospitality | 2018 |
| Take My Hand Limited | Financial services | 2022 |
| Takedown MJC (UK) Ltd | Professional & scientific | 2005 |
| Takehot Limited | Construction | 1988 |
| Takesun Limited | Real estate | 1983 |
| Taking Care Ltd | Health & social care | 2024 |
| Takudzwa Limited | Health & social care | 2015 |
| Takyen International Limited | Construction | 2024 |
| TAL Agency Limited | Administrative & support | 2023 |
| TAL Partners Ltd | Administrative & support | 2023 |
| TAL Tech Ltd | Information & communication | 2024 |
| Talbot Road Investment Ltd | Real estate | 2026 |
| Talcott & Sons Ltd | Households | 2024 |
| Talent Atypical Ltd | Administrative & support | 2023 |
| Talent Genius Ltd | Professional & scientific | 2019 |
| Talent Stem Ltd | Administrative & support | 2025 |
| Talentwise Global Ltd | Administrative & support | 2025 |
| Tales to Inspire 2021 C.I.C. | Education | 2021 |
| Talha Textile Ltd | Wholesale & retail | 2026 |
| Talib Majid Ltd | Financial services | 2015 |
| Talk Feet Podiatry & Chiropody Services Ltd | Real estate | 2024 |
| Talkfeet Estates Ltd | Real estate | 2024 |
| Talking Dog Stitchery Ltd | Wholesale & retail | 2025 |
| Talking Football CIC | Arts & recreation | 2026 |
| Talking Heads Bolton Ltd | Other services | 2024 |
| Talknet UK Ltd | Wholesale & retail | 2024 |
| Tallola Developments Ltd | Real estate | 2024 |
| Talmac Consultancy Ltd | Professional & scientific | 2022 |
| TAM TAM Trade Limited | Wholesale & retail | 2023 |
| Tamas Balint Limited | Information & communication | 2018 |
| Tame Valley Padding Co. Limited | Manufacturing | 1959 |
| Tamen Accountants Limited | Professional & scientific | 2022 |
| Tamen Holdings Limited | Financial services | 2014 |
| Tamesis Facilities Management Ltd | Administrative & support | 2024 |
| Tamesis Governance & Compliance Ltd | Administrative & support | 2025 |