| T C Electrical {Norfolk} Limited | Energy | 2015 |
| T C Garrett Roofing Limited | Construction | 2001 |
| T D Burroughes Limited | Transport & logistics | 2012 |
| T Farrow Construction Limited | Construction | 2003 |
| T Futter Commodities Limited | Wholesale & retail | 2001 |
| T G Bird Tree and Garden Services Ltd | Administrative & support | 2021 |
| T G Contracting Limited | Agriculture & fishing | 2009 |
| T Gill Holdings Limited | Construction | 2007 |
| T J M Audio Limited | Information & communication | 2019 |
| T K International 1 Ltd | Wholesale & retail | 2019 |
| T L Groundworks Ltd | Construction | 2020 |
| T M Howard (Construction) Limited | Construction | 2005 |
| T M M Consultants Limited | Public administration | 2015 |
| T Magee Cleaning Services Ltd | Administrative & support | 2023 |
| T S Atkins Hygienist Limited | Health & social care | 2025 |
| T S I Properties Limited | Real estate | 1999 |
| T S I Structures Limited | Construction | 1995 |
| T&A Onepoint Ltd | Transport & logistics | 2025 |
| T&A Trading (Norwich) Ltd | Wholesale & retail | 2014 |
| T&C Construction (SE) Ltd | Construction | 2013 |
| T&E Commerce Ltd | Wholesale & retail | 2025 |
| T&G Property Development Ltd | Construction | 2019 |
| T&J 93 Limited | Other services | 2026 |
| T&P Creators Ltd | Wholesale & retail | 2026 |
| T&P Property Preston 1 Limited | Real estate | 2020 |
| T&Smediamarketing Ltd | Professional & scientific | 2024 |
| T. & C. Hunt Limited | Wholesale & retail | 1981 |
| T.Alvarez Ltd | Real estate | 2018 |
| T.B.Graham Limited | Real estate | 1931 |
| T.C. Fines & Sons Limited | Extraterritorial | 2000 |
| T.Crawford & Co.Limited | Agriculture & fishing | 1962 |
| T.E.L. (Japan) Ltd | Education | 2019 |
| T.Fielding & Co Limited | Real estate | 1908 |
| T.I.M Site Engineering Ltd | Construction | 2020 |
| T.J. Browne Limited | Professional & scientific | 1987 |
| T.J. Gladden Commercials Ltd. | Wholesale & retail | 1999 |
| T.N.U.C. Brickwork Ltd | Construction | 2017 |
| T.S.F.P. 2024 Ltd | Professional & scientific | 2024 |
| T.W.Page & Son,Limited | Construction | 1963 |
| T16 Ltd | Construction | 2015 |
| T9 Investments Limited | Real estate | 2024 |
| T9 Yacht Services Ltd | Administrative & support | 2025 |
| TA Grady Limited | Transport & logistics | 2023 |
| Taara Limited | Real estate | 2017 |
| Tabarin Limited | Professional & scientific | 2007 |
| Tabbanor Kerb Laying and Paving Ltd | Construction | 2025 |
| Table 12 Ltd | Manufacturing | 2025 |
| Tabs Aviation Ltd | Manufacturing | 2022 |
| Tackville Limited | Wholesale & retail | 2017 |
| Tactica Partners Limited | Professional & scientific | 2012 |
| Tactile Solutions Limited | Information & communication | 2014 |
| Tadl Ltd | Manufacturing | 2019 |
| Tafa Property Maintenance Ltd. | Construction | 2018 |
| TAG Business Services Limited | Professional & scientific | 2026 |
| TAG in the UK Limited | Professional & scientific | 2014 |
| TAG Websites Limited | Administrative & support | 2013 |
| Tagus Limited | Administrative & support | 1959 |
| Taha Cutz Ltd | Other services | 2026 |
| Tahini Ltd | Hospitality | 2022 |
| Tahini Pubs Ltd | Hospitality | 2025 |
| Tahrana Cash & Carry Ltd | Wholesale & retail | 2024 |
| TAI YIN Ltd | Hospitality | 2023 |
| Taiga Projects Ltd | Real estate | 2025 |
| Tailored Glass Ltd | Extraterritorial | 2017 |
| Tailormade Build Ltd | Construction | 2018 |
| Taipan 88 Limited | Financial services | 2023 |
| Tait Pollack Limited | Real estate | 2018 |
| Take 7 Films Limited | Information & communication | 2011 |
| Take Care Tattoo Ltd | Other services | 2024 |
| Taken Solutions Ltd | Public administration | 2018 |
| Takeover Promotional Events Limited | Administrative & support | 2017 |
| Talai Coaching & Consulting Ltd | Professional & scientific | 2025 |
| Talai Property Services Ltd | Real estate | 2024 |
| Talanco Limited | Health & social care | 2022 |
| Talat Khoshakhlaq & Co Limited | Wholesale & retail | 2003 |
| Talavera Global Risk Management Ltd | Administrative & support | 2025 |
| Talbot and Joseph Investments Ltd | Real estate | 2021 |
| Talent Management Limited | Information & communication | 2003 |
| Talentbases Ltd | Information & communication | 2016 |
| Talento Group Ltd | Administrative & support | 2018 |
| Talk Data to ME Ltd | Information & communication | 2016 |
| Talk Events Norwich Ltd | Hospitality | 2018 |
| Talking ELM Tree Services Limited | Administrative & support | 2019 |
| Talking Therapies East Anglia Limited | Other services | 2022 |
| Talktime - Speech and Language Therapy Services Ltd | Other services | 2021 |
| Tall Oaks Holdings Limited | Real estate | 2020 |
| Tall Story Productions Limited | Information & communication | 2005 |
| Tallent Medical Limited | Health & social care | 2024 |
| Talora Business Limited | Education | 2021 |
| Talsie Crown Bess Limited | Construction | 2022 |
| Talsie Energy Limited | Construction | 2021 |
| Talsie Services Ltd | Professional & scientific | 2013 |
| TAM International North Sea Limited | Mining & quarrying | 1984 |
| TAMA75 Limited | Health & social care | 2021 |
| Tamago Translation Limited | Professional & scientific | 2016 |
| Tamakloe Healthcare Limited | Health & social care | 2022 |
| Tamanna Rajrani Enterprise Limited | Hospitality | 2019 |
| Tamanna Spice Limited | Hospitality | 2025 |
| Tamar Healthcare Ltd | Health & social care | 2015 |
| Tamar Labour Agency Ltd | Other services | 2017 |