| 333ANGELUSCUSTOS Limited | Other services | 2025 |
| 34 Michael Road Ltd | Extraterritorial | 2013 |
| 34-44 Pretoria Road RTM Company Ltd | Households | 2025 |
| 35 Courtland Avenue Ltd | Households | 2019 |
| 36 Chaseside Limited | Hospitality | 2015 |
| 360 Aces Ltd | Wholesale & retail | 2025 |
| 360 Degree Studio Ltd | Information & communication | 2016 |
| 360 Hospitality & Catering Services Ltd | Hospitality | 2019 |
| 360 Housing Ltd | Real estate | 2026 |
| 360 IG Limited | Professional & scientific | 2014 |
| 360 Photo Magic Limited | Administrative & support | 2025 |
| 360 PI Limited | Real estate | 2015 |
| 360 Tour Services Ltd | Administrative & support | 2019 |
| 362 Old Ford Road Management Limited | Households | 2006 |
| 365 Protection Ltd | Administrative & support | 2024 |
| 365 Security Solutions Ltd | Administrative & support | 2023 |
| 365 Services (UK) Ltd | Wholesale & retail | 2015 |
| 365 Trading Ltd | Wholesale & retail | 2019 |
| 365 Work Solutions Ltd | Administrative & support | 2023 |
| 376 Gospel Freehold Ltd | Real estate | 2024 |
| 376 Gospel Lane Freehold Ltd | Real estate | 2024 |
| 376 Gospel Leasehold Ltd | Real estate | 2024 |
| 38-44 High Road Buckhurst Hill Limited | Households | 2011 |
| 381 Enterprises Limited | Wholesale & retail | 2024 |
| 388 Direct Ltd | Wholesale & retail | 2014 |
| 3D Minds Limited | Administrative & support | 2014 |
| 3D Nails Limited | Other services | 2022 |
| 3DLIBRARY Ltd | Information & communication | 2022 |
| 3G4G Limited | Professional & scientific | 2016 |
| 3I Industries Ltd | Wholesale & retail | 2023 |
| 3K Marqelo Ltd | Wholesale & retail | 2025 |
| 3KEY Properties Ltd | Real estate | 2025 |
| 3LIFE Limited | Real estate | 2023 |
| 3NTT International Limited | Administrative & support | 2013 |
| 3P Healthcare Limited | Health & social care | 2020 |
| 3PM Reset Ltd | Wholesale & retail | 2026 |
| 3PTHI Ltd | Hospitality | 2025 |
| 3R Driving School Ltd | Education | 2025 |
| 3S Sogny Site Solutions Ltd | Professional & scientific | 2024 |
| 3S Travel Ltd | Administrative & support | 2022 |
| 3S UK Group Ltd | Real estate | 2018 |
| 3SAN Ltd | Real estate | 2009 |
| 3SN Developers Limited | Construction | 2019 |
| 3TEE and Sons Ltd | Transport & logistics | 2019 |
| 4 - Dimensions Media Network Ltd | Information & communication | 2017 |
| 4 and 4A Aberdour Road Ltd | Real estate | 2022 |
| 4 Brothers Mobile Wholesale Ltd | Wholesale & retail | 2019 |
| 4 Corners Distribution Ltd | Wholesale & retail | 2014 |
| 4 Corners Holdings Ltd | Professional & scientific | 2022 |
| 4 Dots Ltd | Wholesale & retail | 2022 |
| 4 Letting Ltd | Real estate | 2025 |
| 4 Oakland Road Redland Bristol Management Company Limited | Households | 1984 |
| 4 Social Work Ltd | Other services | 2016 |
| 4 Stars PCO Ltd | Administrative & support | 2025 |
| 4 Walls and a Roof Ltd | Real estate | 2017 |
| 41 Norfolk Road Ltd | Other services | 2017 |
| 414 Glam Tech Ltd | Wholesale & retail | 2026 |
| 416 Shop Ltd | Hospitality | 2025 |
| 43 Churchfields (South Woodford) Management Limited | Households | 1994 |
| 43 OGR Ltd | Real estate | 2026 |
| 44 Outlet Limited | Other services | 2025 |
| 44 Powis Lane RTM Company Limited | Households | 2024 |
| 44 Quarry Road Ltd | Real estate | 2024 |
| 44 Selborne Road Ltd | Households | 2016 |
| 45 Ashdown Walk (Freehold) Limited | Real estate | 2011 |
| 45 Investments Limited | Real estate | 2023 |
| 46 Somerset Road Management Company Limited | Real estate | 1966 |
| 486 Antrim Road Management Ltd | Real estate | 2011 |
| 490 Group Ltd | Real estate | 2020 |
| 4A International Group Limited | Wholesale & retail | 2025 |
| 4AP Investments Ltd | Real estate | 2020 |
| 4C Properties Limited | Real estate | 2018 |
| 4GP Health Limited | Health & social care | 2023 |
| 4M1S Limited | Wholesale & retail | 2024 |
| 4NDS Network Ltd | Information & communication | 2024 |
| 4PM Recordings Ltd | Professional & scientific | 2024 |
| 4RK Developments LLP | | 2018 |
| 4S Corporation (UK) Ltd | Real estate | 2011 |
| 4S IT Consulting Ltd | Information & communication | 2022 |
| 4S Properties Ltd | Real estate | 2020 |
| 4S4 Ltd | Wholesale & retail | 2021 |
| 4X4 Engine Rebuilds Limited | Wholesale & retail | 2020 |
| 4ZERO.IO Ltd | Professional & scientific | 2021 |
| 5 a Day Smoothies Limited | Wholesale & retail | 2017 |
| 5 Albion House Ltd | Real estate | 2023 |
| 5 Arrays Ltd | Wholesale & retail | 2020 |
| 5 Broomhill Road RTM Company Limited | Households | 2022 |
| 5 DE Vere Gardens Ltd | Real estate | 2022 |
| 5 Rings Limited | Wholesale & retail | 2024 |
| 5 SEG Trading Limited | Transport & logistics | 2014 |
| 5 Star Fruit and VEG (Spitalfields) Ltd | Wholesale & retail | 2011 |
| 5 Star Fruit and VEG London Ltd | Wholesale & retail | 2013 |
| 5 Star Fruit and VEG Trading Ltd | Wholesale & retail | 2013 |
| 5 Star Investment Properties Limited | Real estate | 2019 |
| 5 Star Tyre & Alignment Ltd | Wholesale & retail | 2025 |
| 5 Western Avenue Ltd | Construction | 2023 |
| 50 the Drive RTM Company Limited | Extraterritorial | 2011 |
| 500 Haverstock Hill Limited | Real estate | 2021 |
| 500 London Limited | Real estate | 2021 |
| 500 Notting Hill Gate Limited | Real estate | 2020 |