| 39 Bulmershe Road Property Management Company Limited | Households | 1998 |
| 39 Degrees Ltd | Professional & scientific | 2023 |
| 39 Purley Park Road Limited | Real estate | 2018 |
| 39H Planning Consultancy Ltd | Professional & scientific | 2021 |
| 3D Smile Ltd | Health & social care | 2019 |
| 3D Trade Ltd | Wholesale & retail | 2019 |
| 3D World Ltd | Information & communication | 2016 |
| 3DC Learning Limited | Administrative & support | 2019 |
| 3DPARTPRINTER Ltd | Manufacturing | 2024 |
| 3DQ Homes Ltd | Real estate | 2025 |
| 3DQ Properties Ltd | Real estate | 2021 |
| 3F Co-Operative Limited | Real estate | 2023 |
| 3FOLD Trading Ltd | Wholesale & retail | 2025 |
| 3PL Resources Limited | Administrative & support | 2021 |
| 3R Management Limited | Professional & scientific | 2014 |
| 3S Management Limited | Real estate | 2025 |
| 3S Properties (London) LLP | | 2013 |
| 4 Cantelupe House Limited | Real estate | 2025 |
| 4 Gloucester ROW Management Limited | Households | 1982 |
| 4 Jesmond Road Management Company Limited | Households | 2004 |
| 4 Moreton Road Freehold Limited | Households | 2024 |
| 4 Seasons Roofing and Maintenance Ltd | Construction | 2025 |
| 4 Summit Architectural Limited | Construction | 2016 |
| 4 Summit Ltd | Construction | 2005 |
| 4 Sure Investment Ltd | Financial services | 2020 |
| 4 Sure Security Ltd | Administrative & support | 2018 |
| 4 Sure Services Ltd | Construction | 2020 |
| 4 Vincent Management Limited | Households | 2021 |
| 4-6 Cadogan Square Freehold Limited | Households | 2016 |
| 4-6 Trinity Church Square Freehold Limited | Households | 2015 |
| 40 Falkner Square Management Company Limited | Households | 2005 |
| 40 Havelock Road Management Company Limited | Households | 2000 |
| 40 Lavender Hill Limited | Real estate | 2016 |
| 40 ST Peters Ltd | Households | 2012 |
| 41 Kenilworth Road Limited | Real estate | 2024 |
| 41-43 Culverden Road RTM Company Limited | Households | 2009 |
| 416 Manchester Road RTM Company Limited | Households | 2005 |
| 418 Manchester Road RTM Company Limited | Households | 2005 |
| 42 Lansdowne Road Management Company Limited | Households | 2012 |
| 42 Redcliffe Square Limited | Households | 2005 |
| 42 ST. Helens Limited | Real estate | 2026 |
| 42-43 Compton Road RTM Company Limited | Households | 2005 |
| 42A Bensham Lane Ltd | Real estate | 2022 |
| 43 Chatsworth Road Limited | Households | 2008 |
| 43 Morland Avenue Residents Limited | Households | 2005 |
| 43 ST. Peter's Road (Croydon) Limited | Real estate | 2001 |
| 43-45 Highdown Avenue Management Limited | Households | 1972 |
| 44 Republic Ltd | Information & communication | 2023 |
| 44 Wells Road Limited | Households | 1998 |
| 44-46 Seymour Place Management Company Limited | Households | 2025 |
| 44-48 High Street Ramsey (Management Company) Limited | Households | 2004 |
| 45 Creative Studios Limited | Professional & scientific | 2025 |
| 45 Morland Road RTM Company Limited | Households | 2016 |
| 45 ST Peter's Road Freehold Limited | Households | 2012 |
| 45 Trinity Rise Freehold Company Limited | Households | 2010 |
| 45 Trinity Rise Management Company Limited | Households | 1986 |
| 45-51 Cologne Road Management Limited | Households | 1988 |
| 45RPM Croydon Ltd | Hospitality | 2018 |
| 46 Belmont Park Limited | Households | 2011 |
| 46 High Street Limited | Real estate | 2014 |
| 46 Underhill Road Management Company Limited | Real estate | 2004 |
| 46,47 and 48 Upper Berkeley Street Management Company Limited | Households | 1985 |
| 47 Canning Road Limited | Real estate | 2012 |
| 47 Epsom Road RTM Company Limited | Extraterritorial | 2008 |
| 47 Lawrie Park Road Residents Limited | Households | 1992 |
| 48 Canning Road Management Company Limited | Hospitality | 2000 |
| 48 Coombe Road Limited | Households | 2000 |
| 48 Langney Road Limited | Real estate | 2026 |
| 48FOUR Contract Services Ltd | Construction | 2018 |
| 48FOUR Property Services Ltd | Real estate | 2022 |
| 48FOUR Studios Ltd | Information & communication | 2017 |
| 49 Drewstead Road Management Company Limited | Real estate | 2009 |
| 49 Finborough Road Management Company Limited | Households | 2011 |
| 49 Fremantle Road Limited | Households | 1985 |
| 49 New King Street (Bath) Limited | Households | 2006 |
| 49 Wellington Street (Management) Limited | Households | 2000 |
| 49/51 Tanner Street Management Limited | Households | 2000 |
| 4BY90 Limited | Professional & scientific | 2011 |
| 4CHERRY Ltd | Professional & scientific | 2021 |
| 4COMPLETE Ltd | Professional & scientific | 2014 |
| 4G Scaffolding Ltd | Other services | 2017 |
| 4IN Media Limited | Information & communication | 2019 |
| 4K Tradez Ltd | Wholesale & retail | 2025 |
| 4MOON Windows Ltd | Manufacturing | 2024 |
| 4SEND CIC | Other services | 2024 |
| 4SM Consulting Ltd | Information & communication | 2012 |
| 4SURE Enterprise Ltd | Real estate | 2025 |
| 4W London Ltd | Wholesale & retail | 2025 |
| 5 & 5A Oval Road RTM Company Ltd | Households | 2024 |
| 5 Athol Road RTM Company Limited | Households | 2016 |
| 5 Camden Crescent Management Company Limited | Households | 1998 |
| 5 Campden Hill Gardens Limited | Households | 2009 |
| 5 Cantelupe House Limited | Real estate | 2023 |
| 5 Charlton Road Management Limited | Households | 2003 |
| 5 Cleveland Terrace (Bath)Limited | Households | 1981 |
| 5 Eaton Crescent, Clifton, Limited | Households | 2000 |
| 5 Henrietta Street (Bath) Limited | Households | 1977 |
| 5 ST James Park RTM Company Ltd | Households | 2013 |
| 5 the Crescent Limited | Households | 2019 |
| 5 Ways Fried Chicken Ltd | Hospitality | 2024 |