| Teamsos Limited | Information & communication | 2020 |
| Tech BSS Limited | Information & communication | 2011 |
| Tech Consultancy Ltd | Information & communication | 2022 |
| Technio Limited | Information & communication | 2014 |
| Tecmore Limited | Information & communication | 2011 |
| Tediva Ltd | Health & social care | 2024 |
| Tedmucky Limited | Real estate | 2019 |
| Teece Clearance Ltd | Water & waste | 2024 |
| Tegc Ltd | Wholesale & retail | 2020 |
| Telaventos Ltd | Hospitality | 2020 |
| Teleta Pharma Holdings Limited | Financial services | 2018 |
| Teleta Pharma Limited | Wholesale & retail | 2009 |
| Tempest Films Limited | Information & communication | 2022 |
| Temporary Heat Solutions Ltd | Administrative & support | 2024 |
| TEN TV Ltd | Information & communication | 2019 |
| Tencorp Solutions Ltd | Construction | 2023 |
| Tend to Ltd | Professional & scientific | 2025 |
| TENDER2GO Limited | Professional & scientific | 2025 |
| Teodor Consultancy Limited | Professional & scientific | 2017 |
| Terence Properties Limited | Real estate | 2026 |
| Termhouse (Williams House) Management Limited | Households | 1982 |
| Test Management Solutions Limited | Information & communication | 1999 |
| TFS Vent Ltd | Construction | 2020 |
| TG Talent London Ltd | Administrative & support | 2022 |
| TGC Food Limited | Hospitality | 2007 |
| TGI Investments Ltd | Financial services | 2019 |
| TH Survey Engineering Limited | Construction | 2008 |
| Thames Basement Limited | Construction | 2018 |
| Thames Diesel Injection Parts Limited | Wholesale & retail | 1988 |
| Thames Fish & Grill Ltd | Hospitality | 2025 |
| Thames Formwork Limited | Administrative & support | 1993 |
| Thames Music Limited | Arts & recreation | 1957 |
| Thames Structures & Interiors Limited | Construction | 2019 |
| Thames Valley Inns Limited | Hospitality | 2012 |
| Thandi Cream Ltd | Wholesale & retail | 2023 |
| THE Abbeyfield Loughton Society Limited | Health & social care | 1963 |
| THE Almanack Kenilworth Limited | Hospitality | 2026 |
| THE Almond Group Limited | Information & communication | 2024 |
| THE Assistant Online Ltd | Administrative & support | 2020 |
| THE Association of Brickwork Contractors Limited | Other services | 2002 |
| THE Auvante Group Ltd | Wholesale & retail | 2025 |
| THE Barbers (Doddinghurst) Ltd | Other services | 2019 |
| THE Bearded Butcher Ltd | Wholesale & retail | 2019 |
| THE Beeches (Edenbridge) Management Company Limited | Households | 2003 |
| THE Beeches Residents Association (Chingford) Limited | Households | 1998 |
| THE Big Tipper Limited | Real estate | 2018 |
| THE Business Pages Limited | Information & communication | 2013 |
| THE Cavehill Consultancy Limited | Professional & scientific | 2021 |
| THE Characters Agency Ltd | Professional & scientific | 2020 |
| THE Cigar Holder Ltd | Wholesale & retail | 2019 |
| THE Claire Choice Aesthetics Ltd | Other services | 2025 |
| THE Coach Space Ltd | Professional & scientific | 2019 |
| THE Coffee Code Limited | Hospitality | 2026 |
| THE Collective Grind Limited | Other services | 2023 |
| THE Commuter Property Club Limited | Administrative & support | 2016 |
| THE Courtyard (Newbury Park) Management Limited | Real estate | 2000 |
| THE Creative Edge Media Ltd | Professional & scientific | 2019 |
| THE Culinary Medic Limited | Hospitality | 2019 |
| THE Data Leader GUY Ltd | Administrative & support | 2023 |
| THE Debden Association | Arts & recreation | 2011 |
| THE Decoration and Restoration Company Limited | Construction | 2012 |
| THE Deli Station Limited | Wholesale & retail | 2008 |
| THE Dessert Bar Loughton Ltd | Manufacturing | 2024 |
| THE Door Holdings Limited | Financial services | 2023 |
| THE Door London Limited | Construction | 1999 |
| THE Door PHC Limited | Construction | 2023 |
| THE Door ST Marks Limited | Construction | 2022 |
| THE Door Warren Farm Ltd | Real estate | 2019 |
| THE Door WBR Limited | Administrative & support | 2014 |
| THE Door Widford Ltd | Construction | 2024 |
| THE Engine Export Company Limited | Extraterritorial | 2013 |
| THE Executive Education Company Ltd | Administrative & support | 2025 |
| THE Eyelash Design Company Limited | Wholesale & retail | 2006 |
| THE Fairwood Court Property Management Company Limited | Households | 2002 |
| THE Finance & Guarantee Company Limited | Professional & scientific | 1989 |
| THE Forge Site Services Limited | Construction | 2024 |
| THE Gelato Kitchen Limited | Hospitality | 2023 |
| THE Glastonbury Hotel Limited | Hospitality | 2005 |
| THE Global Clubhouse Ltd | Professional & scientific | 2024 |
| THE Glow Nurse Ltd | Health & social care | 2020 |
| THE Glow UP Shop Ltd | Other services | 2022 |
| THE Gnostic Key Limited | Information & communication | 2025 |
| THE Golden Whisk Limited | Hospitality | 2024 |
| THE Good Neighbour Group Ltd | Hospitality | 2017 |
| THE Grove Loughton Ltd | Real estate | 2020 |
| THE Hoarder Retail Limited | Wholesale & retail | 2016 |
| THE Home Development Group Limited | Construction | 2022 |
| THE House of Holloway Ltd | Professional & scientific | 2024 |
| THE House Portfolio Ltd | Real estate | 2017 |
| THE Hysi Company Limited | Administrative & support | 2025 |
| THE ILA Company (London) Limited | Professional & scientific | 2023 |
| THE Immaculate Collection Ltd | Wholesale & retail | 2015 |
| THE Independent Windscreen Academy Ltd | Education | 2008 |
| THE Industrial Video Recording Company Limited | Information & communication | 2003 |
| THE International Academy of Mediumship Ltd | Administrative & support | 2019 |
| THE Irish Tea Shop & Trading Company Limited | Wholesale & retail | 2020 |
| THE Jenkin Partnership Limited | Real estate | 2009 |
| THE Label Lady Ltd | Manufacturing | 2020 |
| THE Law Support Group Ltd | Administrative & support | 2002 |
| THE Letterbox Consultancy Limited | Transport & logistics | 2005 |