| 3U Property Management Ltd | Hospitality | 2026 |
| 3U Summer Co., Ltd | Professional & scientific | 2015 |
| 3UX Limited | Information & communication | 2019 |
| 3V Consulting Ltd. | Information & communication | 2017 |
| 3V Integrations Ltd | Information & communication | 2020 |
| 3V International Limited | Wholesale & retail | 2001 |
| 3V Properties Ltd | Real estate | 2020 |
| 3V Sigma UK Limited | Wholesale & retail | 2016 |
| 3V3 Football Limited | Arts & recreation | 2026 |
| 3V3 Labs Ltd | Professional & scientific | 2025 |
| 3V3 MSL Ltd | Wholesale & retail | 2020 |
| 3VEDI Solutions Limited | Extraterritorial | 2015 |
| 3VERSE LAB Ltd | Information & communication | 2022 |
| 3VI 4.5 Acres Ltd | Financial services | 2022 |
| 3VI Asset Management Ltd | Administrative & support | 2022 |
| 3VI Coote Lane Land Ltd | Construction | 2018 |
| 3VI Coote Lane Ltd | Health & social care | 2018 |
| 3VI Energy Limited | Wholesale & retail | 2024 |
| 3VI Five Acres Ltd | Administrative & support | 2019 |
| 3VI Limited | Professional & scientific | 2008 |
| 3VI Paddington Gardens Limited | Real estate | 2018 |
| 3VI Panshill Kofuku Ltd | Real estate | 2019 |
| 3VI Westwards House Ltd | Health & social care | 2018 |
| 3VIEWDEVELOPMENTS Ltd | Construction | 2024 |
| 3VISION Media Ltd | Professional & scientific | 2021 |
| 3VISKOVA Limited | Wholesale & retail | 2024 |
| 3W Architecture Limited | Professional & scientific | 1995 |
| 3W Brother Limited | Wholesale & retail | 2024 |
| 3W Brother London Limited | Wholesale & retail | 2024 |
| 3W Consonet LP | | 2022 |
| 3W Electronics Ltd | Manufacturing | 2025 |
| 3W Group Limited | Wholesale & retail | 2023 |
| 3WAVES Digital Ltd | Wholesale & retail | 2021 |
| 3WB Property Ltd | Real estate | 2019 |
| 3WCRAFT Limited | Information & communication | 2025 |
| 3WM Communications Limited | Professional & scientific | 2019 |
| 3WM Developments Limited | Construction | 2022 |
| 3WM Projects Limited | Professional & scientific | 2024 |
| 3WWW Limited | Information & communication | 2018 |
| 3X1Y Ltd | Professional & scientific | 2020 |
| 3X6 Ltd | Professional & scientific | 2023 |
| 3X7X37 Limited | Professional & scientific | 2018 |
| 3XC Ltd | Professional & scientific | 2023 |
| 3XD Limited | Financial services | 2006 |
| 3XHT Ltd | Real estate | 2024 |
| 3XN London Limited | Professional & scientific | 2019 |
| 3XO Entertainment Ltd | Other services | 2025 |
| 3XP Energy Limited | Extraterritorial | 2006 |
| 3XSCREEN Media Limited | Information & communication | 2007 |
| 3XT Solutions Ltd | Professional & scientific | 2011 |
| 3XZ Holding Ltd | Financial services | 2025 |
| 3Y Concepts Ltd | Real estate | 2022 |
| 3Y International Ltd | Wholesale & retail | 2025 |
| 3Y Textile Technology Ltd | Wholesale & retail | 2023 |
| 3YAY Software Ltd | Information & communication | 2024 |
| 3YESSS Ltd | Professional & scientific | 2024 |
| 3YK Trading Ltd | Wholesale & retail | 2023 |
| 3YM Limited | Professional & scientific | 2024 |
| 3Z Digisol Ltd | Information & communication | 2024 |
| 3Z Food Store Limited | Wholesale & retail | 2019 |
| 3Z Naming Rights Limited | Administrative & support | 2021 |
| 3Z Property & Investment Limited | Real estate | 2024 |
| 3Z247 Ltd | Wholesale & retail | 2025 |
| 4 & 5 Northernhay Place Limited | Households | 2005 |
| 4 & 5 Torriano Mews Ltd | Real estate | 2024 |
| 4 & 6 Danbury Street Limited | Households | 2000 |
| 4 - 6 Dunn Street Management Limited | Real estate | 2016 |
| 4 - 6 Putney High Street Limited | Households | 2017 |
| 4 - 6 ST Edmund’S Terrace RTM Company Limited | Households | 2026 |
| 4 10 Consultancy LLP | | 2026 |
| 4 4 Kids Ltd | Professional & scientific | 2015 |
| 4 a Laugh Ltd | Manufacturing | 2022 |
| 4 a Smile 2023 CIC | Information & communication | 2023 |
| 4 Abinger Mews Ltd | Real estate | 2017 |
| 4 Ace Group Ltd | Wholesale & retail | 2026 |
| 4 Aces Digital Limited | Information & communication | 2012 |
| 4 Acland Road (Freehold) Limited | Professional & scientific | 2012 |
| 4 Acre Oast Ltd | Agriculture & fishing | 2022 |
| 4 Adam C.I.C. | Information & communication | 2024 |
| 4 Admaston Road RTM Company Limited | Households | 2017 |
| 4 Albion Place Limited | Construction | 2026 |
| 4 Aldridge Road Villas Limited | Households | 2008 |
| 4 Aldridge Road Villas RTM Company Limited | Households | 2010 |
| 4 Alexandra Grove Limited | Professional & scientific | 2001 |
| 4 ALL Construction Ltd | Construction | 2018 |
| 4 Annandale Road Limited | Real estate | 2009 |
| 4 Anson Road Freehold Limited | Households | 2021 |
| 4 ATL 404 Ltd | Construction | 2019 |
| 4 Auckland Road Limited | Households | 2009 |
| 4 Balance and Health Limited | Health & social care | 2008 |
| 4 Balham Grove Freehold Limited | Households | 2015 |
| 4 Baqee Ltd | Real estate | 2025 |
| 4 Beacon Hill N7 Limited | Households | 2015 |
| 4 Best Brand Ltd | Wholesale & retail | 2026 |
| 4 Birnam Road (Freehold) Company Limited | Real estate | 2006 |
| 4 Bloomsbury Square Ltd | Real estate | 2025 |
| 4 Bolton Road Limited | Households | 2026 |
| 4 Border Crescent RTM Company Limited | Households | 2012 |
| 4 Brentwood Ltd | Real estate | 2016 |
| 4 Brothers Bench Locksmiths Ltd | Professional & scientific | 2023 |