| THE Future Food Co Ltd | Hospitality | 2023 |
| THE Garden Shutter Company Limited | Extraterritorial | 2019 |
| THE Glades Management Company Limited | Households | 2004 |
| THE Glass Padel Ltd | Hospitality | 2026 |
| THE Green Brain Limited | Administrative & support | 2008 |
| THE Headmasters Partnership Limited | Financial services | 1995 |
| THE Healthy Hair Clinic Limited | Other services | 2019 |
| THE House London Ltd | Professional & scientific | 2009 |
| THE Hygge Group Ltd | Administrative & support | 2015 |
| THE Ieft Centre Limited | Education | 2004 |
| THE Igaming Collective Limited | Professional & scientific | 2022 |
| THE Image and Lifestyle Consultancy Limited | Administrative & support | 2012 |
| THE Independent Vintner Ltd | Wholesale & retail | 2012 |
| THE Karwal Group Limited | Financial services | 2020 |
| THE Lash Line Academy Ltd | Other services | 2019 |
| THE Laurels (Weybridge) Ltd | Households | 2021 |
| THE Ledge Productions Limited | Information & communication | 2019 |
| THE London Buddy Scheme C.I.C. | Health & social care | 2026 |
| THE London Garden Design Company Limited | Professional & scientific | 2004 |
| THE Mews 1 RTM Company Limited | Households | 2017 |
| THE Mews 2 RTM Company Limited | Households | 2017 |
| THE Miller Foundation | Education | 2018 |
| THE Naked Property Group Ltd | Financial services | 2019 |
| THE Naked Steading Ltd | Construction | 2019 |
| THE Nobel Web Ltd | Construction | 2025 |
| THE NUT Nest Ltd | Wholesale & retail | 2019 |
| THE Office Experts Ltd | Professional & scientific | 2012 |
| THE Omnisocial Group Ltd | Professional & scientific | 2025 |
| THE Perfume House Ltd | Wholesale & retail | 2025 |
| THE Pilates Club Ltd | Arts & recreation | 2025 |
| THE Place to BE Cafe Ltd | Hospitality | 2025 |
| THE Positive Consulting Group Limited | Professional & scientific | 2023 |
| THE Presentation Academy Limited | Professional & scientific | 2015 |
| THE PUB Whisperer Ltd | Professional & scientific | 2026 |
| THE Regency Commercial One Ltd | Real estate | 2024 |
| THE Regency Commercial Two Ltd | Real estate | 2024 |
| THE Richmond Centre Ltd | Health & social care | 2015 |
| THE River Club Health Property Limited | Real estate | 2025 |
| THE River Club Property Limited | Real estate | 2025 |
| THE Roasting Tradizione Italiana Ltd | Wholesale & retail | 2026 |
| THE Safari Effect CIC | Health & social care | 2026 |
| THE Salesforce Trainer Ltd | Information & communication | 2020 |
| THE Shannon Commercial Centre (Management Company) Limited | Households | 1989 |
| THE Shopping Guru Limited | Professional & scientific | 2022 |
| THE Silkry Ltd | Wholesale & retail | 2024 |
| THE Solar Rooms Ltd | Other services | 2016 |
| THE Supply Story Ltd | Wholesale & retail | 2025 |
| THE Sustainable Property Group Ltd | Financial services | 2023 |
| THE Syntropy Partnership Ltd | Arts & recreation | 2020 |
| THE Thames Concerts Society | Arts & recreation | 2007 |
| THE Three Castles Motor Club | Arts & recreation | 2002 |
| THE Toal Group Ltd | Professional & scientific | 2025 |
| THE Travel Division Group Ltd | Financial services | 2022 |
| THE Travel Division Ltd | Administrative & support | 2013 |
| THE Trident Fusion Ltd | Hospitality | 2025 |
| THE Value Added Centre Ltd | Health & social care | 2019 |
| THE Vender MEN Limited | Wholesale & retail | 2022 |
| THE Vineyard Ltd | Wholesale & retail | 2022 |
| THE Well Mind Clinic Limited | Health & social care | 2021 |
| THE Wooden Mouse School of French Polishing Ltd | Wholesale & retail | 2024 |
| THE Zockoll Group Limited | Other services | 1967 |
| The-Face Ltd | Other services | 2025 |
| Thecloudlabs Limited | Information & communication | 2011 |
| Theju Consulting Ltd | Information & communication | 2017 |
| Themelrosegroup Ltd | Real estate | 2025 |
| Theplaytribe Ltd | Wholesale & retail | 2022 |
| Thermofrost Limited | Professional & scientific | 1971 |
| Theseekapp Ltd | Information & communication | 2025 |
| Thicket Design Ltd | Professional & scientific | 2018 |
| Think ALT Ltd | Professional & scientific | 2022 |
| Third Floor Insights Ltd | Information & communication | 2021 |
| Thirteen Traders Ltd | Wholesale & retail | 2025 |
| Thirty Deep Limited | Information & communication | 2005 |
| This IS Alexander Faraday Limited | Administrative & support | 2020 |
| This IS Alexander Faraday Property Ltd | Real estate | 2024 |
| This IS Therapy Ltd | Other services | 2021 |
| THO3 Limited | Other services | 2018 |
| Thomas Davies Kitchens Ltd | Extraterritorial | 2017 |
| Thomas More Gardens Management Company Limited | Households | 2009 |
| Thomas Webb Recruitment Ltd | Administrative & support | 2009 |
| Thornhill Avenue Residents Limited | Real estate | 2019 |
| Thorntonss Ltd | Construction | 2014 |
| Threaded Media Ltd | Professional & scientific | 2025 |
| Threads Software Limited | Information & communication | 2018 |
| Three Castles Classic Rallies Limited | Arts & recreation | 2004 |
| Three Fates Wares Ltd | Manufacturing | 2024 |
| Three J Traders Ltd | Wholesale & retail | 2025 |
| Three Sixty Vision Limited | Information & communication | 2010 |
| Three Winwinwins Ltd | Hospitality | 2024 |
| THX1138-1 Limited | Wholesale & retail | 1991 |
| TI Accountants LLP | | 2021 |
| TI Accounting Services Limited | Professional & scientific | 2019 |
| Tick Tock Media Ltd | Information & communication | 2025 |
| Tidy Touch Experts Ltd | Administrative & support | 2024 |
| Tiers Consulting Limited | Professional & scientific | 2009 |
| Tiers of Joy Ltd | Manufacturing | 2024 |
| Tiger's Bride Limited | Arts & recreation | 2016 |
| Tilmal Consulting Ltd | Information & communication | 2019 |
| Tilney Court Limited | Households | 2002 |
| Tilt Entertainment Ltd | Information & communication | 2025 |