| 3G Glazing System Ltd | Construction | 2018 |
| 3GENTERPRISE Ltd | Real estate | 2023 |
| 3GS (Midlands) Ltd | Real estate | 2023 |
| 3H GAS Solutions Ltd | Construction | 2025 |
| 3H Media International Ltd | Information & communication | 2012 |
| 3IMEDICINE Ltd | Financial services | 2023 |
| 3JK Ltd | Real estate | 2020 |
| 3K Car Audio Centre Ltd | Wholesale & retail | 2010 |
| 3K Construction Ltd | Construction | 2020 |
| 3K Engineering Limited | Manufacturing | 2009 |
| 3K Group Ltd | Financial services | 2026 |
| 3K Smiles Ltd | Health & social care | 2026 |
| 3KC Ltd | Information & communication | 2017 |
| 3NGAGE IT Associates Ltd | Information & communication | 2014 |
| 3P Investments Limited | Real estate | 2021 |
| 3PL-DIRECT Ltd | Wholesale & retail | 2025 |
| 3R Trade Dynamics (UK) Limited | Extraterritorial | 2014 |
| 3REE-MINDZ Ltd | Wholesale & retail | 2013 |
| 3RM Properties Limited | Real estate | 2015 |
| 3S Foods UK Limited | Wholesale & retail | 2025 |
| 3S Global Trading Ltd | Wholesale & retail | 2025 |
| 3S-HAI Travels Limited | Administrative & support | 2010 |
| 3S3A Ltd | Real estate | 2025 |
| 3SH Holdings Ltd | Real estate | 2024 |
| 3SIXTY Catering Limited | Hospitality | 2016 |
| 3WAYS Recruitments Ltd | Health & social care | 2019 |
| 4 A&A Ltd | Information & communication | 2025 |
| 4 Cats Post Limited | Wholesale & retail | 2015 |
| 4 Core Electrical Contractors Ltd | Construction | 2018 |
| 4 Crescent Avenue Management Company Limited | Households | 2003 |
| 4 Pillars Housing Ltd | Health & social care | 2024 |
| 4 Seasons Catering Services Ltd | Hospitality | 2011 |
| 4 Seasons Cleaning Services Ltd | Administrative & support | 2019 |
| 4 Seasons Domestic Pest Control Ltd | Administrative & support | 2025 |
| 4 Seasons Environmental Services Ltd | Professional & scientific | 2016 |
| 4 Springs Property Ltd | Real estate | 2021 |
| 4 Walls Developments Ltd | Construction | 2012 |
| 4 Your Eyes Ltd | Health & social care | 2005 |
| 40 Gordon Road RTM Company Limited | Households | 2017 |
| 41MD Ltd | Real estate | 2020 |
| 438 ST. Saviours Road Ltd | Real estate | 2019 |
| 44 Cats Ltd | Professional & scientific | 2016 |
| 45 Core Solutions Limited | Health & social care | 2025 |
| 45 Wilberforce Road Limited | Households | 2010 |
| 49 Mellison Road Freehold Limited | Households | 2020 |
| 497 DYL Holdings Ltd | Financial services | 2026 |
| 497 DYL Ltd | Professional & scientific | 2026 |
| 4A Storage Services Limited | Real estate | 2025 |
| 4AA Limited | Administrative & support | 2012 |
| 4AG&MAXI Limited | Transport & logistics | 2023 |
| 4AS Automotive Ltd | Transport & logistics | 2025 |
| 4D Design and Consulting Limited | Professional & scientific | 2018 |
| 4D Music Ltd. | Arts & recreation | 2011 |
| 4D Partners Limited | Households | 2018 |
| 4DM Group Limited | Other services | 1998 |
| 4DM Holdings Limited | Other services | 2003 |
| 4DMI Limited | Professional & scientific | 2007 |
| 4ECOSHOP Ltd | Wholesale & retail | 2015 |
| 4K (EA) Ltd | Real estate | 2026 |
| 4K Asset Management Ltd | Real estate | 2020 |
| 4K Holdco Ltd | Real estate | 2026 |
| 4K Lettings Ltd | Real estate | 2022 |
| 4LEXY Ltd | Wholesale & retail | 2025 |
| 4M Energy Saving Limited | Construction | 2014 |
| 4MOSS Properties Limited | Real estate | 2023 |
| 4PEARLZ Company Ltd | Other services | 2016 |
| 4PEES Care and Training Limited | Public administration | 2023 |
| 4S Associates Ltd | Health & social care | 2014 |
| 4S Business Support Ltd | Administrative & support | 2023 |
| 4S Evington Ltd | Wholesale & retail | 2025 |
| 4S Global Properties Ltd | Real estate | 2019 |
| 4S Store Ltd | Wholesale & retail | 2024 |
| 4SEC Ltd | Administrative & support | 2005 |
| 4SR Ltd | Information & communication | 2018 |
| 4ST Ltd | Transport & logistics | 2021 |
| 4TYTUDE Holdings Ltd | Transport & logistics | 2025 |
| 4WARD Living Ltd | Real estate | 2020 |
| 4YOURCARE Ltd | Health & social care | 2023 |
| 5 Coats Ltd | Wholesale & retail | 2022 |
| 5 KOI Tattoo Studio Ltd | Arts & recreation | 2024 |
| 5 Lions Transport Ltd | Transport & logistics | 2021 |
| 5 Sach Road Freehold Mgmt Co Limited | Real estate | 2022 |
| 5 Star Barber Oadby Limited | Other services | 2024 |
| 50 State & Co Ltd | Financial services | 2026 |
| 502 Ltd | Financial services | 2021 |
| 50DW Ltd | Information & communication | 2022 |
| 51 BOB International Ltd | Real estate | 2019 |
| 51 Estates Ltd | Real estate | 2019 |
| 51 Ruby Stone Ltd | Hospitality | 2019 |
| 51 SJM Ltd | Real estate | 2021 |
| 51 States Ltd | Wholesale & retail | 2016 |
| 51 William & George Ltd | Construction | 2022 |
| 51/53 Sports Road Management Limited | Households | 2021 |
| 52 Stone CIC | Information & communication | 2025 |
| 52 Stone Film Limited | Information & communication | 2025 |
| 52 Sutherland Square Limited | Households | 1986 |
| 555 Properties Leicester Limited | Real estate | 2025 |
| 555PLUMING&HEATINGSERVICES Ltd | Construction | 2024 |
| 55WD Limited | Real estate | 2025 |
| 56 & 56A Kenilworth Road Freehold Ltd | Households | 2022 |