| JST Events NW Ltd | Arts & recreation | 2026 |
| JT Barton Group Limited | Professional & scientific | 2021 |
| JTB Technical Services Ltd | Information & communication | 2025 |
| Jtbrickwork Limited | Construction | 2024 |
| Jtpr Consulting Limited | Professional & scientific | 2015 |
| Jual Solutions Ltd | Construction | 2025 |
| Juan Engineering Services Ltd | Wholesale & retail | 2019 |
| Jubilee Social Work Ltd | Health & social care | 2023 |
| Jude Holland Ltd | Health & social care | 2021 |
| Julia C Evans Ltd | Professional & scientific | 2024 |
| Jumofak International Ltd | Hospitality | 2025 |
| Jump Property Group Ltd | Professional & scientific | 2022 |
| Jumpsmill Limited | Real estate | 2015 |
| Juna-Consulting Ltd | Professional & scientific | 2026 |
| Junction 27 Carriers Ltd | Transport & logistics | 2016 |
| Junction 27 Limited | Hospitality | 2018 |
| Jungle Darts Ltd | Wholesale & retail | 2025 |
| Junior Doctors Productions Ltd | Extraterritorial | 2020 |
| Junior Football Academy Ltd | Education | 2018 |
| Junk Drawer Theatre Co Limited | Arts & recreation | 2024 |
| Jupiter Fire Doors & Maintenance Limited | Construction | 2021 |
| Jupiter Installations Limited | Construction | 2013 |
| Jusna Trading Ltd | Wholesale & retail | 2022 |
| Just Blinds Bolton Ltd | Households | 2022 |
| Just Blinds Wigan Ltd | Wholesale & retail | 2022 |
| Just Florida Ltd | Administrative & support | 2026 |
| Just Internet Solutions Ltd | Information & communication | 2008 |
| Just Japanese Import Car Parts Ltd | Wholesale & retail | 2022 |
| Just Japanese Imports Wigan Ltd | Wholesale & retail | 2025 |
| Just Japanese Ltd | Wholesale & retail | 2019 |
| Just Lanyards Limited | Extraterritorial | 2017 |
| Just ME Associates Ltd | Other services | 2018 |
| Just One More Bar Co. Ltd | Hospitality | 2022 |
| Just Recovery Limited | Professional & scientific | 2011 |
| Just the Place Group Limited | Professional & scientific | 2021 |
| Just Vans Limited | Wholesale & retail | 2011 |
| Just Waste Removals Limited | Water & waste | 2023 |
| Just-German Ltd | Wholesale & retail | 2012 |
| JUW Properties Ltd | Real estate | 2024 |
| JV Support Ltd | Construction | 2024 |
| Jvee Ltd | Health & social care | 2024 |
| JW Autos Ltd | Wholesale & retail | 2017 |
| JW Engineering Services Ltd | Manufacturing | 2025 |
| JW Harper GAS Services Ltd | Construction | 2020 |
| JW Sandblasting Survice Limited | Extraterritorial | 2024 |
| JW4 Limited | Arts & recreation | 2025 |
| JWF Farms Limited | Agriculture & fishing | 2015 |
| JWH Medical Limited | Health & social care | 2012 |
| JWS Northern Limited | Real estate | 2002 |
| JWS Perfumes Ltd | Wholesale & retail | 2025 |
| JY Kinsha Limited Liability Partnership | | 2006 |
| Jyron | Professional & scientific | 2026 |
| JZB Communications Ltd | Wholesale & retail | 2018 |
| K & a Workwear Limited | Wholesale & retail | 2015 |
| K & H Crompton Property Lettings Ltd | Real estate | 2004 |
| K Causey Transport Ltd | Transport & logistics | 2026 |
| K F Rowe Electrical Limited | Construction | 2007 |
| K Food & Wine Limited | Wholesale & retail | 2011 |
| K M Massage Ltd | Health & social care | 2021 |
| K Moran Ltd | Construction | 2005 |
| K Pendlebury & Sons Limited | Construction | 2003 |
| K&D Roofing Repairs Ltd | Construction | 2023 |
| K&H Cleaning Limited | Administrative & support | 2019 |
| K&H Solutions Ltd | Information & communication | 2024 |
| K&H Sports Photography Ltd | Professional & scientific | 2023 |
| K&M B Property Ltd | Real estate | 2024 |
| K&M Standish Taxi’S Ltd | Transport & logistics | 2025 |
| K&N Properties NW Limited | Real estate | 2024 |
| K&S Care Limited | Health & social care | 2024 |
| K&U Homes Ltd | Real estate | 2020 |
| K&Y Joinery Ltd | Construction | 2023 |
| K'S Korner Ltd | Wholesale & retail | 2012 |
| K.C. Carehomes Ltd | Health & social care | 2023 |
| K.H. Care Limited | Health & social care | 2016 |
| K.Hustlerz Limited | Information & communication | 2020 |
| K.O. (North West) Limited | Construction | 2011 |
| K1 Restaurant Limited | Hospitality | 2025 |
| K2 Transline Ltd | Transport & logistics | 2014 |
| K2C Investments Ltd | Financial services | 2025 |
| K2C Rail Limited | Construction | 2024 |
| K2K Logistics Ltd | Transport & logistics | 2017 |
| K5 Holdings Limited | Financial services | 2018 |
| KA Graphics Ltd | Information & communication | 2025 |
| KA Holdings (NW) Limited | Financial services | 2025 |
| KA7 Consulting Ltd | Administrative & support | 2026 |
| Kaabaker Company Limited | Health & social care | 2014 |
| Kafuf Limited | Information & communication | 2025 |
| Kahoma Holdings Limited | Financial services | 2026 |
| Kahuna Ltd | Manufacturing | 2026 |
| Kaizen Ceramics Ltd | Manufacturing | 2013 |
| Kaizen Solutions Enterprise Ltd | Professional & scientific | 2017 |
| Kald Pension Investment Limited | Extraterritorial | 2016 |
| Kali ORA Limited | Real estate | 2018 |
| Kalkman Ltd | Professional & scientific | 2025 |
| Kalmor Limited | Information & communication | 2025 |
| Kalua Creative Limited | Professional & scientific | 2008 |
| KAM KAJ Services Ltd | Wholesale & retail | 2026 |
| KAM Services Limited | Professional & scientific | 2026 |
| Kamkoda Limited | Health & social care | 2023 |
| Kamo Property Investments Ltd | Real estate | 2026 |