| Technip Offshore Manning Services Limited | Administrative & support | 2000 |
| Technip Services Limited | Mining & quarrying | 2015 |
| Technip Ships One Limited | Mining & quarrying | 1988 |
| Technip UK Limited | Mining & quarrying | 1924 |
| Technip-Coflexip UK Holdings Limited | Financial services | 1989 |
| Technipfmc (Europe) Limited | Financial services | 2018 |
| Technipfmc Corporate Holdings Limited | Financial services | 2019 |
| Technipfmc Finance PLC | Administrative & support | 2022 |
| Technipfmc Finance ULC | Extraterritorial | 2018 |
| Technipfmc Group Holdings Limited | Financial services | 2022 |
| Technipfmc International Finance Limited | Financial services | 2017 |
| Technipfmc International UK Limited | Financial services | 2017 |
| Technipfmc PLC | Mining & quarrying | 2015 |
| Technipfmc Umbilicals Ltd | Manufacturing | 1989 |
| Techno Bridge Solution Ltd | Households | 2026 |
| Technocracy Ltd | Information & communication | 2016 |
| Technomatic Limited | Other services | 2025 |
| Technosoftware Limited | Information & communication | 2026 |
| Technovator-Uk Ltd | Professional & scientific | 2020 |
| Techris Consulting Limited | Information & communication | 2019 |
| Techris Forge Ltd | Information & communication | 2026 |
| Techservices (North East) Limited | Manufacturing | 1979 |
| Techstate Limited | Wholesale & retail | 2001 |
| Techtown Ltd | Professional & scientific | 2011 |
| Techwaste North East Ltd | Information & communication | 2022 |
| Techworld Gadgets Ltd | Wholesale & retail | 2021 |
| Techzest Limited | Information & communication | 2022 |
| Tecnosauk Limited | Wholesale & retail | 2014 |
| TED Art Ltd | Wholesale & retail | 2025 |
| TED Leonard Limited | Administrative & support | 2014 |
| TED PMC Ltd | Other services | 2019 |
| Teds Promotions Limited | Arts & recreation | 2022 |
| Tee&Dee Ltd | Real estate | 2025 |
| Tees Healthcare Limited | Health & social care | 2021 |
| Teettam Foods Ltd | Hospitality | 2023 |
| Tehap Ltd | Other services | 2025 |
| Tejus Pharma Ltd | Health & social care | 2021 |
| Tekvemex Ltd | Construction | 2009 |
| Telas Bakery Ltd | Hospitality | 2025 |
| Telchines Fashion Ltd | Manufacturing | 2019 |
| Telco Assist Ltd | Information & communication | 2017 |
| Telecare Services Association | Other services | 1995 |
| Teliytech Initiative Limited | Education | 2026 |
| Teliytech Ltd | Information & communication | 2022 |
| Tell US North CIC | Administrative & support | 2016 |
| Tella Barbers Limited | Other services | 2023 |
| Telmtron Ltd | Information & communication | 2023 |
| Temedix Health Ltd | Information & communication | 2025 |
| Tempertemper Web Design Ltd | Professional & scientific | 2011 |
| Tempest Fine Foods Ltd | Hospitality | 2013 |
| Temple I Property Group and Consultants Ltd | Construction | 2020 |
| Templeflower Estates Limited | Administrative & support | 2015 |
| Templeton LPA Limited | Real estate | 2008 |
| TEN Over TEN Limited | Professional & scientific | 2013 |
| Tenacity Operations Ltd | Professional & scientific | 2026 |
| TENDER2HEALTH Limited | Extraterritorial | 2013 |
| Teneo Labs Ltd. | Manufacturing | 2022 |
| Tenerife Padel Holidays Ltd | Administrative & support | 2026 |
| Tenora Limited | Administrative & support | 2023 |
| Tenro Ltd | Wholesale & retail | 2026 |
| Tensik Group Limited | Other services | 2019 |
| Tenstar Services Limited | | 1986 |
| Tenzing Group Limited | Education | 2022 |
| Tenzing Real Estate Limited | Real estate | 2023 |
| Teod Property Ltd | Real estate | 2024 |
| Teralux Innovations Ltd | Information & communication | 2025 |
| Teramai Sport Psychology Ltd | Health & social care | 2025 |
| Terminal Ride Ltd | Transport & logistics | 2026 |
| Termo Teknik Holdings Limited | Professional & scientific | 2013 |
| Terrace North Ltd | Hospitality | 2024 |
| Terralogix Group Ltd | Information & communication | 2018 |
| Terry Blackburn Consultancy Ltd | Professional & scientific | 2024 |
| Terry's Hairdressing (PDB) Limited | Other services | 2012 |
| Terry's Tow&Go Recovery Newcastle Ltd | Transport & logistics | 2024 |
| Tershe Ltd | Real estate | 2023 |
| Tershe Properties LLP | | 2024 |
| Tervit Surgical Services Ltd | Health & social care | 2016 |
| Tesla Innovations UK Ltd | Professional & scientific | 2025 |
| Tesper Ltd | Administrative & support | 2025 |
| Tesseracted Limited | Education | 2021 |
| Test Driven Solutions Limited | Information & communication | 2020 |
| Tetlow & Smith Limited | Professional & scientific | 2012 |
| TEW Engineering Limited | Manufacturing | 1973 |
| TEW Plus Limited | Information & communication | 2006 |
| Texmoore Commercial Ltd | Real estate | 2019 |
| Texoh Limited | Professional & scientific | 2010 |
| TF Services & Cargo Limited | Other services | 2025 |
| TF16 Investments Limited | Financial services | 2024 |
| TFB Superfoods Ltd | Hospitality | 2025 |
| TFF Events Limited | Wholesale & retail | 2026 |
| TFP Cottages Limited | Construction | 2017 |
| TFS Agency Limited | Health & social care | 2019 |
| TG Brickworks Ltd | Construction | 2014 |
| TG Consulting (NE) Ltd | Professional & scientific | 2025 |
| TG Property Management Limited | Households | 2021 |
| TG Scale Ltd | Wholesale & retail | 2025 |
| TGA Consulting Engineers LLP | | 2007 |
| TGF Estates Limited | Real estate | 2024 |
| TGZ Select T/A Select Carz Ltd | Wholesale & retail | 2024 |
| TH Anaesthesia Limited | Health & social care | 2025 |