| 42PSN Ltd | Households | 2026 |
| 432 Limited | Wholesale & retail | 2025 |
| 44 DE Parys Avenue, Bedford RTM Limited | Households | 2007 |
| 44I Limited | Professional & scientific | 2021 |
| 45 Salon PVT Limited | Other services | 2020 |
| 46 (Contracts) Limited | Construction | 2009 |
| 46 Estates Limited | Real estate | 2019 |
| 48 Grosvenor Square Limited | Real estate | 2025 |
| 4812 Investment Ltd | Real estate | 2022 |
| 4812 Limited | Professional & scientific | 2017 |
| 4812 Management Ltd | Real estate | 2019 |
| 49 Strawberry Dale Avenue Limited | Households | 2022 |
| 49ERS Enterprises Global Football Group Limited | Arts & recreation | 2024 |
| 4A Medics Limited | Health & social care | 2023 |
| 4CAST Investment Group Limited | Financial services | 2021 |
| 4CORNER Concepts Limited | Manufacturing | 2024 |
| 4D Creations Limited | Manufacturing | 2015 |
| 4D Financial Limited | Professional & scientific | 2012 |
| 4DATA Limited | Information & communication | 2008 |
| 4EVERBUILD Ltd | Construction | 2022 |
| 4FHT Limited | Real estate | 2019 |
| 4GADGETS Limited | Extraterritorial | 2015 |
| 4HB Consulting Ltd | Professional & scientific | 2023 |
| 4HILLS Properties Ltd | Real estate | 2024 |
| 4HOUR Limited | Wholesale & retail | 2016 |
| 4IP Ltd | Financial services | 2026 |
| 4IT (Holdings) Limited | Financial services | 2008 |
| 4IT Limited | Extraterritorial | 2017 |
| 4J Technology Ltd | Wholesale & retail | 2022 |
| 4L Cleaning Service Solutions Ltd | Administrative & support | 2025 |
| 4LXM Limited | Wholesale & retail | 2017 |
| 4M Commercial Ltd | Construction | 2026 |
| 4M Elite Intl Trading Ltd | Wholesale & retail | 2021 |
| 4M Property Estates Limited | Real estate | 2024 |
| 4ORTH Group Ltd | Administrative & support | 2025 |
| 4P Retail Ltd | Wholesale & retail | 2022 |
| 4RAIL Consulting Ltd | Professional & scientific | 2009 |
| 4S Imaging Ltd | Administrative & support | 2025 |
| 4SYMBOLS Ltd | Wholesale & retail | 2018 |
| 4TH Coming Events Entertainments Limited | Arts & recreation | 2006 |
| 4TRADE Cars Limited | Wholesale & retail | 2026 |
| 4WARD Vehicle Solutions Limited | Wholesale & retail | 2005 |
| 4WAVE Media Ltd | Administrative & support | 2022 |
| 4WORX Limited | Extraterritorial | 2021 |
| 4YOU Solutions Ltd | Administrative & support | 2023 |
| 4YOUNYOURS Limited | Wholesale & retail | 2022 |
| 5 - 10 Newton Park Mansions Management Company Limited | Households | 2006 |
| 5 K Broadcasting Ltd | Information & communication | 2017 |
| 5 Star Healthcare Ltd | Health & social care | 2014 |
| 5 Star Living Limited | Real estate | 2016 |
| 5 Towns Holdings Ltd | Real estate | 2020 |
| 5 Tracks Business Coaching Ltd | Professional & scientific | 2018 |
| 5 Tracks Investment Ltd | Real estate | 2018 |
| 50 Anchors Ltd | Administrative & support | 2025 |
| 50 Manor House Limited | Real estate | 2021 |
| 50 Pound Social Ltd | Professional & scientific | 2016 |
| 500 M Limited | Construction | 2017 |
| 509 Holdings Limited | Hospitality | 2024 |
| 51 Coffee Ltd | Wholesale & retail | 2018 |
| 5115 Limited | Information & communication | 2017 |
| 52 Chesterton Terrace Limited | Households | 2020 |
| 52 Harwood Road Limited | Real estate | 2004 |
| 53 Degrees App Ltd | Information & communication | 2025 |
| 53 North Digital Ltd | Information & communication | 2026 |
| 53-69 Chaplin Close RTM Company Ltd | Households | 2014 |
| 5359 QSM Ltd | Real estate | 2025 |
| 53DEGREES North (Projects) Limited | Construction | 2013 |
| 54 Degrees North Group Ltd | Professional & scientific | 2026 |
| 54 Degrees North Ltd | Financial services | 2026 |
| 54 Green Lanes (Freehold) Limited | Households | 2025 |
| 55 FS Ltd | Real estate | 2022 |
| 55 Leeds Ltd | Professional & scientific | 2020 |
| 555 Alderley Edge Limited | Real estate | 2021 |
| 555 Executive Travel Ltd | Transport & logistics | 2024 |
| 555 Harrogate Limited | Real estate | 2021 |
| 555 Mill Hill Limited | Real estate | 2021 |
| 555 Muswell Hill Limited | Real estate | 2021 |
| 555 Online Limited | Wholesale & retail | 2021 |
| 555 Retail Ltd | Wholesale & retail | 2021 |
| 555 Temple Fortune 26 Limited | Wholesale & retail | 2021 |
| 55A Leeds Limited | Hospitality | 2019 |
| 567 Club Limited | Health & social care | 2015 |
| 59 Communal Ltd | Real estate | 2020 |
| 59 High Street Limited | Real estate | 2016 |
| 5AM Digital Ltd | Information & communication | 2025 |
| 5IVE Agency Ltd | Professional & scientific | 2017 |
| 5J Airedale House Ltd | Real estate | 2024 |
| 5SURE Gates UK Limited | Professional & scientific | 2015 |
| 5TH Utility Ltd | Information & communication | 2015 |
| 6 Aesthetics and Skin Clinic Ltd | Administrative & support | 2024 |
| 6 Links Ltd | Real estate | 2014 |
| 6 ST Marys Road (Leeds) Freehold Limited | Households | 2021 |
| 60 Kent Road Maintenance Ltd | Administrative & support | 2006 |
| 606 Automotive Limited | Wholesale & retail | 2025 |
| 62 Springfield RD Brighton Freehold Limited | Households | 2017 |
| 622.DIGITAL Limited | Professional & scientific | 2025 |
| 64 Lidgett Lane Limited | Households | 2017 |
| 66 the Grove Ilkley (Management) Limited | Households | 2004 |
| 6688 Limited | Hospitality | 2016 |
| 68 Dental Ltd | Health & social care | 2023 |