| Keenz Management Services Limited | Households | 2023 |
| Keenzsalisu and Co. Ltd | Real estate | 2021 |
| Keep Active Equipment Services Limited | Manufacturing | 2019 |
| Keep Active Mobility Ltd. | Administrative & support | 2014 |
| Keep Invest (UK) Limited | Real estate | 2024 |
| Kefa Ventures Ltd | Construction | 2023 |
| Kelbrook Fisheries Limited | Hospitality | 2000 |
| Keldesign Limited | Professional & scientific | 2025 |
| Kelham Works RTM Company Limited | Households | 2021 |
| Kellie Dale Limited | Professional & scientific | 2017 |
| Kelly Sunshine Travel Ltd | Administrative & support | 2026 |
| Kelly Taverns Limited | Hospitality | 2020 |
| Kelmarkad Limited | Public administration | 2025 |
| Kelvin Supplies Limited | Wholesale & retail | 2011 |
| Kemps Solicitors Limited | Extraterritorial | 2010 |
| Kenect Click Pharma Ltd | Wholesale & retail | 2025 |
| Kenhome Ltd | Real estate | 2025 |
| Kenley - Solutions - Ltd | Transport & logistics | 2025 |
| Kennedy Contracting Limited | Wholesale & retail | 1993 |
| Kenneth Buckley Ltd | Professional & scientific | 2014 |
| Kenneth Investing Ltd | Real estate | 2016 |
| Kensington Security (UK) Limited | Administrative & support | 2024 |
| Kenyon Group Limited | Manufacturing | 1979 |
| Kenyon Paints Limited | Wholesale & retail | 1986 |
| Kenzie Kouriers Limited | Transport & logistics | 2016 |
| Kerbside Systems Ltd | Information & communication | 2026 |
| Kerlaw & Co. Limited | Financial services | 2020 |
| Keromina Ltd | Administrative & support | 2011 |
| Kers Innovation UK Limited | Manufacturing | 2020 |
| Kers Innovations Ltd | Manufacturing | 2018 |
| Kershaws of Uppermill Ltd | Other services | 2003 |
| Kersley Cars Limited | Transport & logistics | 2026 |
| Kersley Medical Care Ltd | Health & social care | 2018 |
| Kesan Foods Limited | Hospitality | 2013 |
| Ketec Automation Ltd | Professional & scientific | 2019 |
| Kevekalunex Limited | Wholesale & retail | 2025 |
| Kevi (Retford) 1 Management Company Limited | Households | 2013 |
| Kevi (Retford) 2 Management Company Limited | Households | 2013 |
| Kevin Hand Car Wash Ltd | Wholesale & retail | 2026 |
| Kewa Limited | Wholesale & retail | 2026 |
| Key Recovery Services (UK) Limited | Administrative & support | 1992 |
| Key Support Ltd | Wholesale & retail | 2024 |
| Keyaan Global Ltd | Wholesale & retail | 2025 |
| Keyaan Logistics Ltd | Other services | 2018 |
| Keycellar Ltd | Wholesale & retail | 2022 |
| Keyman Estates Ltd | Real estate | 2022 |
| Keypoint Services Ltd | Professional & scientific | 2025 |
| Keyrent-Properties Ltd | Real estate | 2025 |
| Keystone Cargo Ltd | Transport & logistics | 2025 |
| Keystone Market Research Ltd | Professional & scientific | 2023 |
| Kezy House Ltd | Real estate | 2020 |
| KFB Security Limited | Construction | 2024 |
| KFM Management Ltd | Professional & scientific | 2016 |
| KG Auto Electronics Ltd | Other services | 2022 |
| KG Electronics Online Ltd | Other services | 2025 |
| KG Nails Ltd | Other services | 2025 |
| KG UK Properties Ltd | Construction | 2026 |
| KGH Management Services Ltd | Construction | 2016 |
| KH a Builders Ltd | Construction | 2023 |
| KH Flooring Ltd | Construction | 2017 |
| Khadija Accountant's Ltd | Professional & scientific | 2023 |
| Khadija Cosmetics Limited | Wholesale & retail | 2021 |
| Khalifi Ltd | Other services | 2010 |
| Khan 804 Grill Ltd | Hospitality | 2026 |
| Khan Arooj Ltd | Education | 2025 |
| Khan Bricks Layers & Builders Limited | Manufacturing | 2023 |
| Khan Builders Oldham Limited | Construction | 2020 |
| Khan Chappli Kebab Ltd | Hospitality | 2024 |
| Khan Fresh Ltd | Transport & logistics | 2025 |
| Khan Fruit & VEG Oldham Ltd | Wholesale & retail | 2025 |
| Khan Pizza Place Limited | Hospitality | 2019 |
| Khan's Foodstore Limited | Wholesale & retail | 2021 |
| Khans Chappli Kebab Ltd | Hospitality | 2024 |
| Khanz Care Limited | Health & social care | 2014 |
| Khattak Services Ltd | Wholesale & retail | 2017 |
| Khau Galli Ltd | Hospitality | 2025 |
| Khawaja Logistics Hub Ltd | Transport & logistics | 2026 |
| KHD Property Solutions Ltd | Real estate | 2024 |
| Khemar Limited | Wholesale & retail | 2023 |
| KHI Solutions Ltd | Information & communication | 2017 |
| Khizar Masood Construction (Smc-Private) Limited | Financial services | 2025 |
| Khizdeals Ltd | Wholesale & retail | 2026 |
| Khokhra Solutions Ltd | Professional & scientific | 2025 |
| Khyber Foods Oldham Ltd | Wholesale & retail | 2026 |
| Khyber Kebabs Oldham Ltd | Hospitality | 2024 |
| KI Consultancy & Marketing Limited | Professional & scientific | 2025 |
| KI10 Games Ltd | Information & communication | 2024 |
| Kiana Property Holdings Ltd | Real estate | 2022 |
| Kiavah Tech Ltd | Information & communication | 2024 |
| Kibian Creations Ltd | Wholesale & retail | 2024 |
| KIC Consultancy Services Ltd | Administrative & support | 2016 |
| Kick Property and Financial Services Ltd | Financial services | 2025 |
| Kicksports Ltd | Education | 2023 |
| Kidco Trading Ltd | Wholesale & retail | 2010 |
| Kidderpore Restaurant and Social Club Ltd | Hospitality | 2026 |
| Kidderpore Restaurant Oldham Ltd | Hospitality | 2026 |
| Kieron Travis Installations Ltd | Construction | 2026 |
| Kiki&Co Ltd | Wholesale & retail | 2023 |
| Kilixco Ltd | Wholesale & retail | 2026 |
| Killan Structural Limited | Construction | 1987 |