| THE London CNC Factory Ltd | Manufacturing | 2016 |
| THE London LEX Practice Limited | Professional & scientific | 2024 |
| THE Love Mogul Ltd | Administrative & support | 2024 |
| THE Ludlow Mews Management Company Limited | Real estate | 1988 |
| THE Magical Enchanted Boutique Limited | Other services | 2025 |
| THE Manor Residents Management Company Limited | Real estate | 2004 |
| THE Marylebone Club Limited | Health & social care | 2021 |
| THE MCG Group International Limited | Administrative & support | 1994 |
| THE Middle East Consultancy Services Limited | Professional & scientific | 2010 |
| THE Millstream Residents Association Limited | Real estate | 1988 |
| THE Mirror Clinic Limited | Health & social care | 2026 |
| THE MJS Group Limited | Real estate | 2018 |
| THE Mutable Organisation Limited | Information & communication | 2026 |
| THE Nottingham Manufacturing Company Limited | Extraterritorial | 1958 |
| THE Office Works (Nationwide) Limited | Administrative & support | 2004 |
| THE Old LEO Company Limited | Manufacturing | 1921 |
| THE Olerio Group Ltd | Other services | 2019 |
| THE Orchard Contract Catering Ltd | Hospitality | 2023 |
| THE Original Maids of Honour Limited | Manufacturing | 1990 |
| THE Paddocks Management (Denham) Co. Ltd | Households | 2007 |
| THE Palm Island Ltd | Hospitality | 2015 |
| THE Pantry (UK) Limited | Hospitality | 2014 |
| THE Pantry Peach Tree Ltd | Manufacturing | 2025 |
| THE Pharmacist Clinic Ltd | Wholesale & retail | 2023 |
| THE Pillars Group Ltd | Information & communication | 2021 |
| THE Pilot Centre Limited | Administrative & support | 1992 |
| THE Pink Garage Company Limited | Wholesale & retail | 2013 |
| THE Plug Projects Ltd | Construction | 2022 |
| THE Poplars Didcot (5A) Management Company Limited | Real estate | 1993 |
| THE Recruitment Guru Limited | Professional & scientific | 2025 |
| THE Refinishing Touch Limited | Administrative & support | 2008 |
| THE Rehab Borough Ltd | Other services | 2019 |
| THE Repair Campaign Limited | Other services | 2023 |
| THE Ridgeway Tenants Association Limited | Households | 2004 |
| THE Rose and Olive Pizzeria Limited | Hospitality | 2025 |
| THE Rossmore Partnership Ltd | Wholesale & retail | 2013 |
| THE Roti Shack Ltd | Hospitality | 2020 |
| THE Safety Advisor Ltd | Professional & scientific | 2026 |
| THE SK Hub Ltd | Information & communication | 1990 |
| THE Sleepover Company Ltd | Extraterritorial | 2020 |
| THE Snopake Group Limited | Wholesale & retail | 1978 |
| THE Sofa Company London Ltd | Manufacturing | 2021 |
| THE South London Private GP Limited | Health & social care | 2018 |
| THE Specialist Italian Sausage Makers Limited | | 2006 |
| THE Spiritual Coach Ltd | Other services | 2024 |
| THE Stair, Ramp and Gantry Company Limited | Professional & scientific | 2011 |
| THE Story Forge Ltd | Professional & scientific | 2025 |
| THE Strategic Centre Ltd | Professional & scientific | 2011 |
| THE Surrey Cleaning Company Ltd | Administrative & support | 2022 |
| THE Swallows (Blocks E, F, G, and H) Management Company Limited | Households | 1995 |
| THE Temple Spaces Ltd | Education | 2025 |
| THE Textile Printing and Sourcing Company Limited | Other services | 1996 |
| THE Thatched PUB Company Limited | Hospitality | 2018 |
| THE Tich Grill Ltd | Hospitality | 2025 |
| THE Tichenham Deli Ltd | Wholesale & retail | 2025 |
| THE Travelogue Holidays Limited | Administrative & support | 2025 |
| THE Trevor (Unique) Ltd | Manufacturing | 2018 |
| THE UNI Private Limited | Wholesale & retail | 2013 |
| THE Upgrade Project Ltd | Information & communication | 2021 |
| THE Uxbridge Flower Stall Ltd | Wholesale & retail | 2025 |
| THE Vacation Centre Ltd | Administrative & support | 2025 |
| THE Village Baker and Family Ltd | Manufacturing | 2025 |
| THE Vine Lounge Ltd | Hospitality | 2023 |
| THE Virdi Portfolio Ltd | Real estate | 2020 |
| THE Vitality Nurse Ltd | Health & social care | 2025 |
| THE Walnuts (Oundle Road) Management Company Limited | Households | 2003 |
| THE Wedding Bunch Ltd | Professional & scientific | 2022 |
| THE West London Glazing Company Limited | Construction | 2007 |
| THE Woofy Ltd | Wholesale & retail | 2025 |
| THE Xerox (UK) Trust | Health & social care | 1982 |
| THE ZEN Master Group Ltd | Professional & scientific | 2023 |
| THE4MGROUP Limited | Arts & recreation | 2025 |
| Theaben Limited | Real estate | 2011 |
| Thebespokeconcierge Limited | Wholesale & retail | 2026 |
| Thebluebellcottage Limited | Extraterritorial | 2020 |
| Theexcellencegroupllc Ltd | Wholesale & retail | 2025 |
| Thefoodlords Ltd | Hospitality | 2018 |
| Thefunction Limited | Manufacturing | 2025 |
| Thehomespacecompany Limited | Construction | 2025 |
| Thehsbusiness Limited | Wholesale & retail | 2025 |
| Them Grill Limited | Hospitality | 2024 |
| Them Street Food Ickenham Limited | Hospitality | 2024 |
| Theo's Park Cafe Ltd | Hospitality | 2024 |
| Theonlinechemist.Uk Ltd | Health & social care | 2024 |
| Theos Bars Ltd | Hospitality | 2025 |
| Therapeutico Ltd | Wholesale & retail | 2019 |
| Therapy in Practice Ltd | Health & social care | 2015 |
| Thind Properties Services Ltd | Real estate | 2025 |
| Thind's Construction Limited | Construction | 2025 |
| Think Smart Academy 3 Ltd | Education | 2019 |
| Thinker Cars Limited | Transport & logistics | 2014 |
| Thinktemp Solutions Limited | Construction | 2004 |
| Third EYE Security Ltd | Administrative & support | 2011 |
| Thirteen Investments 2024 Limited | Professional & scientific | 2024 |
| Thirty SIX Hemstal Road Limited | Households | 1981 |
| This IS Fitz Limited | Wholesale & retail | 2025 |
| Thomas Heating Limited | Construction | 2021 |
| Thomas Salaam Limited | Information & communication | 2013 |
| Thomas Truck Loaders Limited | Manufacturing | 2023 |
| Thornhill Property Ltd | Real estate | 2018 |