| 2VMP Limited | Other services | 2021 |
| 3 Brothers Exports Ltd | Wholesale & retail | 2020 |
| 3 Chillies Consulting Ltd | Information & communication | 2015 |
| 3 Leaves Cleaning Ltd | Administrative & support | 2025 |
| 3 Rays of SON Limited | Other services | 2023 |
| 30 Reis Car Services Limited | Wholesale & retail | 2019 |
| 30-32 Brook Path Limited | Households | 2020 |
| 30-38 Park Street Management Limited | Households | 2005 |
| 301 Rochfords Gardens RTM Company Limited | Households | 2015 |
| 301PHARMASERVICES Limited | Wholesale & retail | 2022 |
| 30CC Ltd | Wholesale & retail | 2021 |
| 3133 Properties Limited | Real estate | 2018 |
| 32 Burgett Road Limited | Real estate | 2022 |
| 33LV Estates Ltd | Real estate | 2023 |
| 35A Upton Park Freehold Limited | Households | 2022 |
| 360 Estate Management London Ltd | Real estate | 2024 |
| 360 Executive Cars Ltd | Transport & logistics | 2023 |
| 360 Renovations Limited | Construction | 2024 |
| 360 Vision Fitness Wellness Nutrition CIC | Hospitality | 2022 |
| 360 Wrap Around Ltd | Health & social care | 2024 |
| 360GT Plates Ltd | Manufacturing | 2023 |
| 360POINT1 Ltd | Professional & scientific | 2025 |
| 365 Concrete Ltd | Construction | 2012 |
| 365 Retailers Ltd | Wholesale & retail | 2022 |
| 365 Systems Ltd | Information & communication | 2013 |
| 365CONNECT Ltd | Information & communication | 2022 |
| 3663 First for Foodservice Limited | Wholesale & retail | 2006 |
| 3663 Transport Limited | Transport & logistics | 1948 |
| 38 Cleveland Square Management Limited | Real estate | 1989 |
| 381 MS Ltd | Information & communication | 2012 |
| 3A Prestige UK Ltd | Wholesale & retail | 2023 |
| 3AMOK Ltd | Construction | 2025 |
| 3AR Investments Limited | Real estate | 2024 |
| 3BROSKIES Ltd | Construction | 2025 |
| 3C Specialists Ltd | Health & social care | 2024 |
| 3D Printing Academy Ltd | Manufacturing | 2023 |
| 3F Construction Ltd | Construction | 2025 |
| 3G Mobile Communications Limited | Wholesale & retail | 2002 |
| 3I Leadtech Limited | Information & communication | 2020 |
| 3I Techno IT Limited | Information & communication | 2024 |
| 3I Uiuus Properties Limited | Real estate | 2025 |
| 3IM Limited | Professional & scientific | 2019 |
| 3KAP.X Limited | Professional & scientific | 2025 |
| 3N Solutions Limited | Health & social care | 2024 |
| 3PL Global Ltd | Wholesale & retail | 2018 |
| 3RJ Ltd | Information & communication | 2017 |
| 3S Consultant Ltd | Information & communication | 2013 |
| 3X Homes Expert Solutions Ltd | Real estate | 2024 |
| 4 MA (Slough) Ltd | Wholesale & retail | 2020 |
| 4 Pharm Limited | Health & social care | 2007 |
| 4 the Pulse Ltd | Real estate | 2021 |
| 40A and 40B Woodland Avenue (Freehold) Limited | Households | 2013 |
| 41 KAY Road Limited | Households | 2008 |
| 42-48 Coniston Crescent Freehold Limited | Households | 2026 |
| 425D Productions Ltd | Wholesale & retail | 2021 |
| 43 London Road RTM Limited | Households | 2025 |
| 454 Ltd | Information & communication | 2011 |
| 47 Trinity Street Management Company Limited | Real estate | 2004 |
| 470 Broadoak Court Ltd | Real estate | 2020 |
| 49REDESIGN Ltd | Wholesale & retail | 2014 |
| 4D Residential Solutions Ltd | Real estate | 2016 |
| 4EVERE Construction Ltd | Construction | 2023 |
| 4EVERGROWING Ltd | Construction | 2025 |
| 4FUTURE Pro FC Limited | Arts & recreation | 2019 |
| 4H Service Ltd | Transport & logistics | 2025 |
| 4NBX Limited | Construction | 2026 |
| 4S IT Consultancy Ltd | Information & communication | 2025 |
| 4S Technology Services Ltd | Information & communication | 2022 |
| 4U Healthcare Recruitment Ltd | Administrative & support | 2022 |
| 4X4 Motorsport Limited | Wholesale & retail | 2019 |
| 4X4 Sales Limited | Wholesale & retail | 2026 |
| 5 Rivers Care Ltd | Health & social care | 2026 |
| 5 Rivers Construction Ltd | Wholesale & retail | 2015 |
| 500 Investments Limited | Real estate | 2024 |
| 511 Money Transfer Limited | Administrative & support | 2025 |
| 514 Consolidated Limited | Real estate | 2023 |
| 55 Milman Road Ltd | Real estate | 2026 |
| 555 Technologies Limited | Professional & scientific | 2021 |
| 59 ST John's Villas Limited | Households | 2006 |
| 5S Construction Services Ltd | Construction | 2019 |
| 6 Buccleuch Road RTE (Freehold) Company Limited | Households | 2005 |
| 6/12 Primrose Hill Road Management Limited | Households | 2010 |
| 60 Consulting Ltd | Professional & scientific | 2018 |
| 63 & 65 Gordon Road Limited | Real estate | 2021 |
| 65PR Ltd | Real estate | 2020 |
| 66 Upton Park Management Limited | Households | 2013 |
| 68C Group Limited | Construction | 2017 |
| 7 Day Mini Market Ltd | Wholesale & retail | 2026 |
| 7 Days Food & Wine Limited | Wholesale & retail | 2012 |
| 7 Empires Barber Shop Ltd | Other services | 2018 |
| 7 RTM Company Limited | Households | 2025 |
| 7 Skies Ltd | Administrative & support | 2024 |
| 7 Star Building Limited | Construction | 2022 |
| 7 Star Hospitality Ltd | Hospitality | 2025 |
| 7 Star London Ltd | Real estate | 2019 |
| 7 Star Super Market Ltd | Wholesale & retail | 2020 |
| 711 Cars Limited | Transport & logistics | 2007 |
| 74-80 Salisbury Avenue Limited | Households | 2001 |
| 76 the Crescent Freehold Limited | Households | 2022 |
| 784 Van Hire Ltd | Administrative & support | 2026 |