| Jodi Lettings Limited | Real estate | 2025 |
| Joee Gifting Ltd | Wholesale & retail | 2026 |
| John Andrews Hairdressing (Monton) Ltd | Other services | 2011 |
| John Evans International Limited | Information & communication | 1986 |
| John Page Electrical Ltd | Construction | 2015 |
| Johnson Homes (Manchester) Limited | Real estate | 2016 |
| Johnsons of Sale Ltd | Financial services | 2013 |
| Johnston Marine Consultants Ltd | Extraterritorial | 2021 |
| Join US Consultancy Ltd | Information & communication | 2021 |
| Jomo Limited | Construction | 2003 |
| JON Peake Carpentry Ltd | Manufacturing | 2020 |
| JON Ronson Limited | Arts & recreation | 2005 |
| Jono Skinkis Construction Ltd | Construction | 2023 |
| Jope Properties Limited | Professional & scientific | 2020 |
| Joseph and Joseph Healthcare Ltd | Health & social care | 2025 |
| Jothi Holding Limited | Financial services | 2025 |
| Jothi Investments Limited | Financial services | 2025 |
| Joy Fountain Home Properties Ltd | Hospitality | 2025 |
| JP Housing and Properties Ltd | Real estate | 2025 |
| JP311 Ltd | Professional & scientific | 2026 |
| JPD Consultancy Group Limited | Professional & scientific | 2025 |
| Jpretty Consulting Ltd | Professional & scientific | 2019 |
| JQD Holdings Ltd | Administrative & support | 2024 |
| JQZ Engineering Consultancy Ltd | Professional & scientific | 2016 |
| JR Enterprises UK Limited | Hospitality | 2004 |
| JRL Legal Services Limited | Professional & scientific | 2021 |
| JS and EG Limited | Other services | 2016 |
| JS Selection Limited | Administrative & support | 2016 |
| JSK Transport (Lancs) Ltd | Transport & logistics | 2014 |
| Jskons Healthcare Limited | Health & social care | 2026 |
| Jskons Ltd | Professional & scientific | 2014 |
| JSL Property Group Limited | Real estate | 2016 |
| Jssr Properties Ltd | Real estate | 2020 |
| JT Mechanics Ltd | Wholesale & retail | 2012 |
| JT Pumps Limited | Manufacturing | 2015 |
| JTC Services Group Ltd | Financial services | 2021 |
| Judy Punto Health Care Services Ltd | Health & social care | 2018 |
| Julie Hatchell Opticians Limited | Professional & scientific | 2005 |
| Jumbo Nest Ltd | Hospitality | 2024 |
| Jumpworks Marketing Limited | Administrative & support | 2016 |
| Jupiter Neurodiagnostics (UK) Ltd | Health & social care | 2020 |
| Jushomes Ltd. | Real estate | 2023 |
| Just NRM Limited | Wholesale & retail | 2024 |
| Justine Rawlins PR Ltd | Professional & scientific | 2012 |
| JVM Developments Limited | Construction | 2018 |
| Jwbailey Limited | Transport & logistics | 2024 |
| JY Sublime Limited | Real estate | 2024 |
| Jyo's Boutique Ltd | Wholesale & retail | 2026 |
| K E Cars Limited | Transport & logistics | 2008 |
| K.H. Fabrication Solutions Ltd | Manufacturing | 2008 |
| K.I.E.N Automation Limited | Manufacturing | 2024 |
| K.R. Phones Ltd | Wholesale & retail | 2018 |
| K2 Software Systems Limited | Information & communication | 2010 |
| Kabin Company DIY Limited | Manufacturing | 2021 |
| Kabin Company Manchester Ltd | Construction | 2019 |
| Kaes Services Ltd | Health & social care | 2026 |
| Kaizen Content Limited | Information & communication | 2025 |
| Kalaguran Services Limited | Health & social care | 2024 |
| Kalima Ltd | Health & social care | 2016 |
| Kalyani Retail Ltd | Wholesale & retail | 2019 |
| KAM Hing Thorne Ltd | Hospitality | 2025 |
| Kamchi Food Ltd | Hospitality | 2024 |
| Kameleon Building Analysis Limited | Professional & scientific | 2017 |
| Kamsat Ltd | Manufacturing | 2013 |
| KAN TAK Temple | Other services | 2015 |
| Kanchi International Ltd | Wholesale & retail | 2023 |
| Kanina Construction Ltd | Construction | 2017 |
| Kanonrno Ltd | Wholesale & retail | 2025 |
| Kardan Enterprises Limited | Real estate | 2025 |
| Karen L Martin Ltd | Administrative & support | 2015 |
| Kareng Properties Ltd | Real estate | 2026 |
| Kasana Consulting Ltd | Construction | 2017 |
| Kasana Ltd | Construction | 2020 |
| Kasell Ltd | Real estate | 2020 |
| Kasl Engineering Group Limited | Financial services | 2020 |
| Kasl Precision Machining (Washington) Limited | Manufacturing | 2004 |
| Kassab Property Ltd | Real estate | 2017 |
| Katalyma Ltd | Real estate | 2020 |
| Kaur Strategic Holdings Limited | Financial services | 2021 |
| KBL Advisory (Leeds) Limited | Professional & scientific | 2025 |
| KBL Advisory (Liverpool) Limited | Professional & scientific | 2023 |
| KBL Advisory (NE) Limited | Professional & scientific | 2020 |
| KBL Advisory Limited | Professional & scientific | 2019 |
| KDA Developments Ltd | Real estate | 2020 |
| KDK12 Limited | Professional & scientific | 2018 |
| KDM Group 2002 Ltd | Financial services | 2024 |
| KDM Motortech Limited | Manufacturing | 2005 |
| KDW Consultancy Limited | Administrative & support | 2017 |
| Keague Ltd | Information & communication | 2019 |
| Keane Futures Ltd | Education | 2021 |
| Keane Futures NW Limited | Education | 2026 |
| Kebab 1 Ltd | Hospitality | 2024 |
| Kebal Consulting Limited | Professional & scientific | 2020 |
| Keef IT Simple Ltd | Information & communication | 2025 |
| Keep & Fancy Ltd | Wholesale & retail | 2024 |
| Kelbrook Aromas Limited | Wholesale & retail | 2021 |
| Kelly Louise Hairdressing Ltd | Other services | 2023 |
| Kelly Percival Design Ltd | Professional & scientific | 2007 |
| Kelly Realty Ltd | Real estate | 2024 |
| Kellys Wines Limited | Wholesale & retail | 1999 |