| John.L.Dalton & Co Ltd | Professional & scientific | 2006 |
| Johnson Consult Limited | Professional & scientific | 2026 |
| Johnson-Yates Construction Ltd | Construction | 2023 |
| Jones Lighting Ltd | Construction | 2008 |
| Jordanian Doctors in the United Kingdom Ltd | Other services | 2025 |
| Joseph Garr Limited | Wholesale & retail | 2002 |
| Josh Fidell Creative Limited | Professional & scientific | 2024 |
| JPA Distributions Ltd | Wholesale & retail | 2026 |
| Jpak Consulting Limited | Information & communication | 2025 |
| JPF Gases (North West) Ltd | Wholesale & retail | 2013 |
| JPJ Holdings Limited | Financial services | 2018 |
| JR and JR Lettings Limited | Real estate | 2021 |
| JRK Decorators Ltd | Other services | 2013 |
| JSH Real Estate Limited | Real estate | 2020 |
| JSK Motor Group Limited | Wholesale & retail | 2025 |
| JSN Web Assets Ltd | Wholesale & retail | 2024 |
| JT (Northwest) Limited | Construction | 2022 |
| Jt&W Limited | Construction | 2024 |
| Jtech Management Limited | Professional & scientific | 2024 |
| JTW Developments Ltd | Real estate | 2018 |
| Jugno Trading Ltd | Wholesale & retail | 2015 |
| Jump UK Sports Ltd | Arts & recreation | 2012 |
| Jungly Properties Ltd | Real estate | 2021 |
| Jupitron Ltd | Information & communication | 2014 |
| Just Events London Limited | Arts & recreation | 2026 |
| Just Group London Limited | Financial services | 2026 |
| Justsocial Limited | Administrative & support | 2018 |
| JV Surveying Ltd | Construction | 2020 |
| JW Transport (NW) Ltd. | Transport & logistics | 2014 |
| JWA Aesthetics Ltd | Other services | 2026 |
| JYM Holdings Ltd | Financial services | 2025 |
| JZW Products and Services Ltd | Construction | 2023 |
| K & M Precision Engineering Limited | Manufacturing | 2002 |
| K. T. S. Fabrications Limited | Professional & scientific | 2003 |
| K.B Building Services (NW) Limited | Construction | 2019 |
| K.C. Management (NW) Ltd | Real estate | 2023 |
| K.S.R Retail Limited | Wholesale & retail | 2022 |
| K2CLOUD Ltd | Information & communication | 2025 |
| KAG Engineering Ltd | Professional & scientific | 2022 |
| Kallisti Coffee Ltd | Other services | 2019 |
| Kally Baber X Ltd | Other services | 2024 |
| Kamkai Ltd | Hospitality | 2023 |
| Kanuber Ltd | Manufacturing | 2023 |
| Karen Pullan Human Resources and Training Consultancy Limited | Education | 2016 |
| Katcommerce UK Ltd | Information & communication | 2019 |
| Kate's Beauty Space Limited | Other services | 2023 |
| Kato Services Ltd | Construction | 2025 |
| KB Accounts and Taxation Services Ltd | Professional & scientific | 2021 |
| KB Kitchen Leyland Ltd | Hospitality | 2026 |
| KBC NW Limited | Arts & recreation | 2017 |
| Keep Moving Forward Ltd | Wholesale & retail | 2025 |
| KEN Linford Gardencare Limited | Wholesale & retail | 1995 |
| Kenyon IT Solutions Limited | Information & communication | 2013 |
| Kerakoll U.K. Limited | Manufacturing | 2003 |
| Key Unlocking Futures Limited | Health & social care | 2013 |
| Keymt Installation Ltd | Manufacturing | 2009 |
| Keys Business Services Limited | Professional & scientific | 2006 |
| Kfitcoaching Ltd | Arts & recreation | 2026 |
| Kick on Parties and Events Limited | Arts & recreation | 2026 |
| Kirbyx Ltd | Information & communication | 2019 |
| Kirsty Maccaskill Limited | Other services | 2010 |
| KIT4 Ltd | Professional & scientific | 2003 |
| Kitchen PR25 Ltd | Hospitality | 2025 |
| Kiwibeach Logistics UK Ltd | Other services | 2024 |
| KJF Projects Ltd | Administrative & support | 2025 |
| KKR Group Limited | Information & communication | 2026 |
| Kneen Homes (Samlesbury) Ltd | Construction | 2026 |
| Kneen Homes Golden Hill Limited | Construction | 2023 |
| Kneen Homes Leyland Ltd | Construction | 2023 |
| Kneen Homes Limited | Construction | 2019 |
| Knights Rentals Ltd | Real estate | 2022 |
| KNJ Group Ltd | Administrative & support | 2026 |
| Knotweed Eradication Limited | Professional & scientific | 2022 |
| Knowledge Bank Onprofile Ltd | Information & communication | 2009 |
| Knutsford Art Gallery Ltd | Arts & recreation | 2024 |
| Kolla Properties Limited | Real estate | 2018 |
| Koslow Ltd | Construction | 2025 |
| KP Path Ventures Ltd | Real estate | 2024 |
| KRD Barbers 1 Limited | Other services | 2025 |
| KRN Medical Services Ltd | Administrative & support | 2016 |
| KS Education Limited | Education | 2010 |
| KSB Roofing Solutions Ltd | Construction | 2023 |
| KSH Hospitality Ltd | Hospitality | 2022 |
| Kshrah Holdings Limited | Financial services | 2021 |
| KST Kitchens Ltd | Construction | 2019 |
| KT Innovations Ltd | Professional & scientific | 2021 |
| Kubehaus Ltd | Construction | 2011 |
| Kurdish Hair Masters (Leyland) Ltd | Other services | 2020 |
| KW Couriers (NW) Limited | Transport & logistics | 2020 |
| L & J Decorators Ltd | Construction | 2018 |
| L J Business Consultancy Ltd | Professional & scientific | 2016 |
| L&P Homes Ltd | Real estate | 2017 |
| L.E.N. Property Services Ltd | Real estate | 2025 |
| L.I.J. Fluid Power Ltd. | Manufacturing | 1994 |
| LA Clarke Fencing Contractors Ltd | Manufacturing | 2017 |
| LA Corte Limited | Hospitality | 2014 |
| LA Viva Limited | Hospitality | 2019 |
| Ladybird Confectionery Limited | Manufacturing | 2008 |
| Lancashire Aesthetics Limited | Health & social care | 2023 |
| Lancashire Black Business Network Ltd | Administrative & support | 2026 |