| 3ARCHWAY Limited | Real estate | 2015 |
| 3B Pro UK Ltd | Manufacturing | 2024 |
| 3B-IT Limited | Wholesale & retail | 2005 |
| 3BROTHERSMHH Limited | Wholesale & retail | 2024 |
| 3C Enterprises Limited | Hospitality | 2023 |
| 3C PR Limited | Professional & scientific | 2014 |
| 3CATS Limited | Administrative & support | 2018 |
| 3D 360 Limited | Professional & scientific | 2020 |
| 3D 360 Skills Academy CIC | Professional & scientific | 2023 |
| 3D CAD Design Limited | Professional & scientific | 2011 |
| 3D Craft Hub Ltd | Professional & scientific | 2025 |
| 3D Design & Projects Ltd | Professional & scientific | 2025 |
| 3D Framework Limited | Information & communication | 2006 |
| 3D Mechpipe Limited | Professional & scientific | 2022 |
| 3D Protective Group Ltd | Financial services | 2025 |
| 3D SET Company Limited | Professional & scientific | 2002 |
| 3D Solicitors Ltd. | Professional & scientific | 2017 |
| 3D Supplies (MCR) Ltd | Manufacturing | 2019 |
| 3D-JER Services Ltd | Wholesale & retail | 2026 |
| 3D7 Technologies Ltd | Professional & scientific | 2015 |
| 3DR Studio Limited | Information & communication | 2007 |
| 3DREID Birmingham Limited | Professional & scientific | 2017 |
| 3DREID Manchester Limited | Professional & scientific | 2017 |
| 3DRENDER Ltd | Information & communication | 2007 |
| 3DW (Design and Print) Ltd | Professional & scientific | 2024 |
| 3E Security+ Limited | Administrative & support | 2023 |
| 3E Web Media Ltd | Professional & scientific | 2024 |
| 3EEES Healthcare Limited | Health & social care | 2023 |
| 3G Accounting Ltd | Professional & scientific | 2011 |
| 3GS Holdings Ltd | Financial services | 2015 |
| 3H Houses Limited | Real estate | 2026 |
| 3H Properties Ltd | Construction | 2011 |
| 3I Evolution Limited | Extraterritorial | 2023 |
| 3JSOLUTIONS Ltd | Households | 2017 |
| 3KY Limited | Other services | 2022 |
| 3L Property Investment Ltd | Real estate | 2025 |
| 3M Supplies Ltd | Wholesale & retail | 2025 |
| 3MDRIVE Ltd | Transport & logistics | 2025 |
| 3MK Trading Ltd | Wholesale & retail | 2021 |
| 3MS Solutions Services Limited | Administrative & support | 2022 |
| 3PL Global Solutions Ltd | Transport & logistics | 2022 |
| 3PMOVER Limited | Wholesale & retail | 2026 |
| 3PS Solutions Limited | Other services | 2019 |
| 3Q Consulting Ltd | Professional & scientific | 2024 |
| 3RD EYE Accountax Ltd | Professional & scientific | 2017 |
| 3RD EYE Bookkeeping & Payroll Ltd | Professional & scientific | 2023 |
| 3RD March Limited | Financial services | 2022 |
| 3RD Prime Ltd | Information & communication | 2024 |
| 3RD Space Limited | Arts & recreation | 2017 |
| 3RD Venture Limited | Construction | 2025 |
| 3RIO Events Ltd | Hospitality | 2022 |
| 3ROTHERS Community Gym CIC | Arts & recreation | 2026 |
| 3ROTHERS Gym Limited | Arts & recreation | 2025 |
| 3S Makan Limited | Real estate | 2024 |
| 3S Medical and Education Services and Support Ltd | Education | 2025 |
| 3SIXTY Facilities Solutions Ltd | Construction | 2025 |
| 3SIXTY Transfers Limited | Administrative & support | 2024 |
| 3SPN 1.0 Ltd | Construction | 2021 |
| 3TCO Limited | Wholesale & retail | 2025 |
| 3TWO1 Theatre School Ltd | Arts & recreation | 2019 |
| 3VMEDS Bioscience Ltd | Manufacturing | 2024 |
| 3VRM Limited | Information & communication | 2016 |
| 3XL Ltd | Administrative & support | 2015 |
| 3YLBMONEY Limited | Health & social care | 2020 |
| 4 Alliance Ltd | Information & communication | 2025 |
| 4 BIZ Properties Limited | Real estate | 2018 |
| 4 Canal Street Limited | Real estate | 2015 |
| 4 Catherine Road Limited | Real estate | 2025 |
| 4 Elegant Essentials Ltd | Wholesale & retail | 2020 |
| 4 Gladestone Road Ltd | Real estate | 2022 |
| 4 Hammonds Ltd | Other services | 2025 |
| 4 Hardman ST Management Company Limited | Real estate | 2024 |
| 4 Legal Limited | Extraterritorial | 2008 |
| 4 Legal Solutions Limited | Extraterritorial | 2008 |
| 4 Manchester Property Ltd | Real estate | 2024 |
| 4 Medical Clinical Solutions Ltd | Health & social care | 2018 |
| 4 Plan Limited | Construction | 1999 |
| 4 Season F & V Ltd | Hospitality | 2015 |
| 4 Seasons Inn Limited | Hospitality | 2018 |
| 4 Trader Ltd | Wholesale & retail | 2025 |
| 400 Wilbraham Road Management Limited | Real estate | 2007 |
| 404 Found Ltd | Information & communication | 2025 |
| 40FR Ltd | Financial services | 2019 |
| 40HS Ltd | Wholesale & retail | 2025 |
| 41 Alan Road Limited | Households | 2002 |
| 41 Lowndes RTM Company Limited | Households | 2021 |
| 411 Beverages Limited | Manufacturing | 2018 |
| 411 Ltd | Other services | 2014 |
| 42 Atwood Road Management Company Limited | Households | 2001 |
| 42'S Records Ltd | Manufacturing | 2019 |
| 42-44 Sackville Street RTM Company Limited | Households | 2010 |
| 42-46 Drake ST Rochdale Ltd | Real estate | 2012 |
| 4291 Limited | Professional & scientific | 2011 |
| 42GEARS Mobility Systems (UK) Limited | Information & communication | 2017 |
| 42GTD Limited | Real estate | 2025 |
| 42ND Street - Community Based Resource for Young People Under Stress | Health & social care | 1990 |
| 43 Half Edge Lane RTM Company Ltd | Households | 2010 |
| 43RED Ltd | Construction | 2024 |
| 44 Central Road Management Ltd | Households | 2013 |
| 44 Turkish Ltd | Other services | 2022 |