| THE Gunyah Wine Cellar Ltd | Wholesale & retail | 2024 |
| THE Heath Catering Limited | Hospitality | 2024 |
| THE Henry Higgins Group Limited | Financial services | 2022 |
| THE Hoops Inn (Perry Green) Ltd | Hospitality | 2025 |
| THE HR Specialists Consultancy Ltd | Administrative & support | 2012 |
| THE Jerk Chicken MAN Ltd | Hospitality | 2021 |
| THE Joseph Mckenzie Archive Limited | Professional & scientific | 2020 |
| THE Kennerley Rumford Trust | Other services | 2003 |
| THE Klinik Academy Ltd | Other services | 2023 |
| THE Klinik Aesthetic Ltd | Other services | 2021 |
| THE Knowlesy Academy Borehamwood Limited | Health & social care | 2023 |
| THE Learning Partnership Trust | Education | 2015 |
| THE Little Brook Retreat Limited | Other services | 2026 |
| THE Little Victorian Ltd | Real estate | 2023 |
| THE Logistics Organisation Ltd | Transport & logistics | 2015 |
| THE London Infusion Clinic Ltd | Health & social care | 2019 |
| THE London Session Orchestra Ltd | Arts & recreation | 2017 |
| THE Lunar Effect Ltd | Information & communication | 2026 |
| THE Luxury Purse Company Ltd | Wholesale & retail | 2020 |
| THE Magic Mushroom Restaurants Limited | Hospitality | 2002 |
| THE March Corporation Limited | Administrative & support | 2013 |
| THE Masos Arms Trading Ltd | Hospitality | 2024 |
| THE Mayesbrook Gardens (Barking) NO.3 Residents Company Limited | Households | 1991 |
| THE Mortgage IFA Limited | Financial services | 2017 |
| THE Munir Group Limited | Real estate | 2019 |
| THE NDA Co. Ltd | Professional & scientific | 2017 |
| THE New Lemon Tree Limited | Hospitality | 2019 |
| THE Noire Design Studio Ltd | Wholesale & retail | 2023 |
| THE Noodle&Dumpling Bar Ltd | Hospitality | 2026 |
| THE Ocean Writer Ltd | Professional & scientific | 2023 |
| THE Officers' Mess Business Centre LLP | | 2013 |
| THE Old Bakery Management (Luton) Limited | Households | 2004 |
| THE Old Farmyard (Residents Association) Limited | Households | 2000 |
| THE Old Rectory Estate (Bletchingley) Ltd | Other services | 2023 |
| THE Orchid Practice Ltd | Health & social care | 2016 |
| THE Parent App Technologies Ltd | Information & communication | 2021 |
| THE Pastures (Hoggetts END) Management Company Limited | Households | 2017 |
| THE Pathgold Partnership LLP | | 2012 |
| THE Pebble People Group Limited | Manufacturing | 2025 |
| THE Penge Brewing Co Ltd | Manufacturing | 2023 |
| THE Pixel Mine Ltd | Information & communication | 2017 |
| THE Pizza Guys Ltd | Hospitality | 2015 |
| THE Plough Radwinter Limited | Hospitality | 2025 |
| THE PMU Tech Ltd | Other services | 2025 |
| THE Process Business Ltd | Administrative & support | 2014 |
| THE Recruitment CMO Limited | Professional & scientific | 2024 |
| THE Retail Report Limited | Information & communication | 2015 |
| THE Retreat Room Limited | Health & social care | 2019 |
| THE Rising Tide Collective Networking Ltd | Other services | 2024 |
| THE Search Cure Limited | Professional & scientific | 2026 |
| THE Secret Gardener (Essex) Ltd | Administrative & support | 2012 |
| THE Security & Intelligence Group Limited | Administrative & support | 2026 |
| THE Sensory Home Media Production Ltd | Information & communication | 2022 |
| THE Silk Route Dining Limited | Hospitality | 2026 |
| THE Silvester PUB Company Limited | Hospitality | 2024 |
| THE Slow Group Ltd | Arts & recreation | 2015 |
| THE Smokin Braai Ltd | Manufacturing | 2025 |
| THE Snooty Hound Ltd | Professional & scientific | 2021 |
| THE Sourdough Toaster Ltd | Hospitality | 2022 |
| THE Southey Dispensary Limited | Hospitality | 2022 |
| THE ST Benedict Group Limited | Construction | 2019 |
| THE Stoney Common Residents Association Limited | Hospitality | 2004 |
| THE Tadros Limited | Health & social care | 2022 |
| THE Therapy Tree (Essex) Limited | Other services | 2025 |
| THE Timekeeper Ltd | Other services | 2024 |
| THE Top Box Ltd | Extraterritorial | 2022 |
| THE UK Christmas Company Limited | Wholesale & retail | 2022 |
| THE Venetian Plaster Service Limited | Construction | 2020 |
| THE Village Tearoom (Hatfield Heath) Ltd | Hospitality | 2019 |
| THE VW Audi TEC Specialists (Bishops Stortford) Ltd | Wholesale & retail | 2017 |
| THE Wellesley Road RTE Company Ltd | Extraterritorial | 2014 |
| THE Will Practice & Associates Ltd. | Professional & scientific | 2010 |
| Theatre Trips With Fiona Ltd | Administrative & support | 2026 |
| Thecabinetshop LLP | | 2018 |
| Thedesignerbubble Limited | Administrative & support | 2013 |
| Thegivingmachine | Health & social care | 2014 |
| Themait Ltd | Information & communication | 2024 |
| Theprecompany Ltd | Manufacturing | 2023 |
| Thermal Breaks Europe Ltd | Manufacturing | 2023 |
| Thermapool Ltd | Administrative & support | 2011 |
| Theydon Hall Farm Management Company Limited | Households | 2005 |
| Thin Metal Films Holdings Limited | Real estate | 2018 |
| Thin Metal Films Limited | Manufacturing | 2006 |
| Thinking Gifts Company Limited | Wholesale & retail | 2006 |
| Thinktrees Ltd | Agriculture & fishing | 2010 |
| Thirteen Creative Services Limited | Professional & scientific | 2021 |
| This IS Reckless Ltd | Professional & scientific | 2025 |
| Thomas Yorke Ltd | Administrative & support | 2017 |
| Thomas-Davies & Company (London) Limited | Real estate | 1998 |
| Thompson Education Consultancy (TEC) Limited | Professional & scientific | 2015 |
| Thompsons Maintenance LLP | | 2013 |
| Thorley Practice Limited | Health & social care | 2016 |
| Thorley Roofing Limited | Construction | 2014 |
| Thorn & Roses Ltd | Wholesale & retail | 2022 |
| Thorn Grove Management Company Limited | Households | 2001 |
| Thoughtfully Ltd | Administrative & support | 2013 |
| Thoughtfully Media Ltd | Information & communication | 2021 |
| Three Fields Consulting Limited | Professional & scientific | 2025 |
| Three&Four Partners Limited | Professional & scientific | 2025 |
| Threek Limited | Information & communication | 2014 |