| 3M Haulage Ltd | Transport & logistics | 2026 |
| 3MC Holdings Ltd | Professional & scientific | 2024 |
| 3R&C Transport Ltd | Transport & logistics | 2023 |
| 3RDCLOUD.CO.UK Limited | Information & communication | 2023 |
| 3S Logistics Services Limited | Transport & logistics | 2022 |
| 3SIXTY Estate Planning Limited | Professional & scientific | 2020 |
| 3SIXTY Financial Solutions Limited | Financial services | 2013 |
| 3T Online Ltd | Information & communication | 2025 |
| 3ZERO2 Projects Ltd | Construction | 2023 |
| 4 ALL Things Italian Limited | Administrative & support | 2015 |
| 4 Blue Ltd | Information & communication | 2024 |
| 4 Calvert Croft Limited | Hospitality | 2019 |
| 4 Fans Productions Ltd | Professional & scientific | 2020 |
| 4 Planning Delivery Limited | Professional & scientific | 2013 |
| 4 Seasons GAS Limited | Construction | 2025 |
| 4 Smart Plant Limited | Extraterritorial | 2015 |
| 4-3-3 Ltd | Other services | 2007 |
| 4-WAYS Auto Solutions Ltd | Wholesale & retail | 2026 |
| 40 Buchanan Gardens (Freehold) Limited | Households | 2016 |
| 400 Motors Ltd | Wholesale & retail | 2023 |
| 41-42 West Road RTM Company Ltd | Households | 2019 |
| 418 Mart Ltd | Wholesale & retail | 2025 |
| 420 Degrees Coffee Limited | Wholesale & retail | 2018 |
| 442 Property Solutions Limited | Construction | 2016 |
| 46 Sunrise Drive Limited | Hospitality | 2022 |
| 46-47 Oakley Street Freehold Limited | Households | 2025 |
| 471 Print & Promotions Limited | Manufacturing | 2015 |
| 47MILES Ltd | Hospitality | 2024 |
| 4D Properties Holdings Limited | Real estate | 2001 |
| 4DEXTERITY Limited | Health & social care | 2019 |
| 4FRONT Events Ltd | Professional & scientific | 2014 |
| 4J Group Ltd | Real estate | 2026 |
| 4JS Property Maintenance Ltd | Other services | 2022 |
| 4M Care Limited | Health & social care | 2025 |
| 4POINT2 Limited | Professional & scientific | 2013 |
| 4SLC for Stocksbridge Leisure Centre Trust | Arts & recreation | 2013 |
| 4SLC Trading Ltd | Construction | 2020 |
| 4TH Dimension IT Limited | Information & communication | 2015 |
| 4W Property Ltd | Hospitality | 2019 |
| 4X Whale Limited | Transport & logistics | 2024 |
| 4YOU-EXPORT-IMPORT Limited | Wholesale & retail | 2019 |
| 4YOUXPRO Limited | Construction | 2024 |
| 5 Killieser Avenue Company Limited | Real estate | 1997 |
| 5 Seasons Trading Group Ltd | Wholesale & retail | 2019 |
| 5 Staar UK Ltd | Wholesale & retail | 2025 |
| 5 Star London Ltd | Wholesale & retail | 2024 |
| 5-4-1 Limited | Other services | 2009 |
| 50 Degrees EBD Ventures Limited | Other services | 2021 |
| 50 Degrees Limited | Administrative & support | 2010 |
| 50 Sunrise Drive Limited | Hospitality | 2023 |
| 501 Electrical Limited | Construction | 2022 |
| 5052 Consulting Limited | Information & communication | 2019 |
| 50:50 Future Ltd | Professional & scientific | 2019 |
| 513 Enterprise Limited | Manufacturing | 2016 |
| 519 Property Limited | Real estate | 2012 |
| 52 Walt Ltd | Real estate | 2024 |
| 53 Degrees North Engineering Limited | Professional & scientific | 2013 |
| 53 High Street RTM Company Ltd | Households | 2020 |
| 54 High Street RTM Company Ltd | Households | 2019 |
| 568 Mobile Bars Limited | Hospitality | 2024 |
| 57 Management Ltd | Real estate | 2024 |
| 57DIGITAL Ltd | Information & communication | 2011 |
| 580'S Property Investments Ltd | Real estate | 2020 |
| 59 Chaucer Road Freehold Limited | Households | 2013 |
| 59 King Henrys Walk RTM Company Ltd | Households | 2022 |
| 5G Asset Management Limited | Financial services | 2017 |
| 5H Property and Investments Limited | Real estate | 2021 |
| 5HEFFIELD 5UBARU 5ERVICE Ltd | Wholesale & retail | 2008 |
| 5J Accountants and Consultants Ltd | Professional & scientific | 2022 |
| 5KO Limited | Wholesale & retail | 2020 |
| 5NPR Ltd | Water & waste | 2026 |
| 5RP Ltd | Real estate | 2024 |
| 5X Window and Fleet Cleaning Service Ltd | Manufacturing | 2025 |
| 6 Primos Limited | Real estate | 2024 |
| 6 Tapton House Road Limited | Households | 2018 |
| 6000BC Ltd | Manufacturing | 2020 |
| 61RNO Ltd | Transport & logistics | 2026 |
| 62 Shorrolds Road Management Limited | Real estate | 2007 |
| 65 Courtfield Gardens Management Company Limited | Households | 1984 |
| 654 Developments Limited | Construction | 2002 |
| 66 Englefield Road Management Company Limited | Households | 1994 |
| 666 EAT Ltd | Hospitality | 2013 |
| 6868 Eats Ltd | Hospitality | 2026 |
| 6BARRE Ltd | Health & social care | 2025 |
| 6G Limited | Professional & scientific | 2008 |
| 6IX Holdings Ltd | Financial services | 2023 |
| 7 Days Express Market Ltd | Wholesale & retail | 2024 |
| 7 GRP UK Ltd | Construction | 2012 |
| 7 Hill Blinds UK Ltd | Wholesale & retail | 2025 |
| 7 Hill Minimarket Limited | Wholesale & retail | 2024 |
| 7 Hills Blinds Limited | Wholesale & retail | 2016 |
| 7 Hills Building Co Ltd | Other services | 2021 |
| 7 Hills Car Detailing Ltd | Wholesale & retail | 2025 |
| 7 Hills Car Wash Ltd | Administrative & support | 2025 |
| 7 Hills Cars and Storage Ltd | Transport & logistics | 2019 |
| 7 Hills Convenience Ltd | Wholesale & retail | 2016 |
| 7 Hills Flat Roofing Ltd | Construction | 2025 |
| 7 Hills Mortgages Limited | Professional & scientific | 2023 |
| 7 Hills Plastering Ltd | Construction | 2026 |
| 7 Hills Projects Limited | Construction | 2024 |