| KMJ Management Limited | Other services | 2025 |
| Kmmc Group Services Limited | Administrative & support | 2026 |
| KMP Admin Ltd | Administrative & support | 2020 |
| KMP Costume Services Ltd | Information & communication | 2023 |
| KMP Pritchard Ltd | Health & social care | 2022 |
| KMS Property & Management Ltd | Real estate | 2025 |
| KMS Rentals Limited | Households | 2012 |
| Kmss Consultancy Services Ltd | Professional & scientific | 2024 |
| KMX Fitness Limited | Arts & recreation | 2023 |
| KMY Shop Ltd | Wholesale & retail | 2025 |
| Kmye Ltd | Hospitality | 2020 |
| KN Energy Centre Ltd | Energy | 2022 |
| KN Surfacing Ltd | Construction | 2019 |
| KNC Consultancy Ltd | Information & communication | 2022 |
| KNC Ecommerce Ltd | Wholesale & retail | 2025 |
| KNC Logistics Limited | Transport & logistics | 2025 |
| Kneale & Mcconville Limited | Information & communication | 2021 |
| Knight FM Ltd | Administrative & support | 2022 |
| Knight Industries Two Thousand Limited | Manufacturing | 2017 |
| Knight Temple Recruitment Ltd. | Administrative & support | 2020 |
| Knightbrooke Limited | Wholesale & retail | 2025 |
| Knightgale Services Limited | Administrative & support | 2024 |
| Knights & Castle Estates Ltd | Real estate | 2024 |
| Knights Templar Brotherhood Ltd | Other services | 2025 |
| Knightsbridge Construction Group Ltd | Manufacturing | 2018 |
| Knightsbridge Global Ltd | Financial services | 2021 |
| Knightsbridge Homes Group Ltd | Construction | 2018 |
| Knightsbridge Property Global Ltd | Real estate | 2021 |
| Knightsbridge Property Group Ltd | Construction | 2017 |
| Knightsbridge Sales & Lettings Group Ltd | Real estate | 2018 |
| Knightwoods Development Limited | Construction | 2018 |
| KNJ Investments Limited | Wholesale & retail | 2018 |
| KNK Joinery Ltd | Construction | 2023 |
| KNL Consultancy Services Limited | Professional & scientific | 2023 |
| KNL Professional Cleaning Services Limited | Administrative & support | 2022 |
| KNM Property Ltd | Real estate | 2020 |
| Knockout Online Limited | Wholesale & retail | 2023 |
| Knocturnal Knights Limited | Other services | 2013 |
| Knolle Developments Limited | Construction | 2025 |
| Knot and Bird Limited | Manufacturing | 2017 |
| Knotty ASH Community Transport | Transport & logistics | 2008 |
| Knotty ASH Productions Ltd | Information & communication | 2024 |
| Knotty ASH Tyres Ltd | Wholesale & retail | 2022 |
| Knotty ASH Upholstery Ltd | Other services | 2025 |
| Knotweed Legal Ltd | Professional & scientific | 2017 |
| Knovaa Limited | Administrative & support | 2017 |
| Know Hostel Liverpool Limited | Hospitality | 2017 |
| Know Knife Crime CIC | Education | 2025 |
| Know Services Limited | Professional & scientific | 2016 |
| Knowat.Com Limited | Professional & scientific | 2003 |
| Knowledge 2 Achieve Limited | Professional & scientific | 2024 |
| Knowledge Call Limited | Arts & recreation | 2001 |
| Knowsley Bespoke Joinery Design Ltd | Manufacturing | 2025 |
| Knowsley Building & Environmental Services Limited | Construction | 2005 |
| Knowsley Business Centre Ltd. | Administrative & support | 1997 |
| Knowsley Business Services Limited | Information & communication | 2011 |
| Knowsley Car Dismantlers Limited | Extraterritorial | 2014 |
| Knowsley Carpets and Flooring Limited | Wholesale & retail | 2022 |
| Knowsley Dementia Care Support Memory Lane C.I.C. | Health & social care | 2014 |
| Knowsley District Citizens Advice Bureau | Information & communication | 1995 |
| Knowsley Domestic Supplies Ltd | Wholesale & retail | 2019 |
| Knowsley Electric Charging Ltd | Energy | 2022 |
| Knowsley Electrical Supplies Ltd | Wholesale & retail | 2025 |
| Knowsley Enterprise Academy | Education | 2002 |
| Knowsley Fencing Contractors Ltd | Construction | 1999 |
| Knowsley Furniture Centre Ltd | Wholesale & retail | 2017 |
| Knowsley Industrial Supplies Ltd | Wholesale & retail | 2013 |
| Knowsley Instrument Services Limited | Professional & scientific | 2020 |
| Knowsley Lift Services Limited | Professional & scientific | 2000 |
| Knowsley Print Finishing Limited | Manufacturing | 2008 |
| Knowsley Software Ltd | Extraterritorial | 2024 |
| Knowsley Surfacing Limited | Construction | 2009 |
| Knowsley Transport International Ltd | Transport & logistics | 2018 |
| Knowsley Travel Ltd | Transport & logistics | 2014 |
| Knowsley Village Hall Ltd | Construction | 2024 |
| Knowsleycare Limited | Hospitality | 2016 |
| Knox Energy Ltd | Construction | 2025 |
| Knox Facilities Management Ltd | Construction | 2021 |
| Knox Maintenance Ltd | Construction | 2021 |
| Knutsford Business Services Holdings Limited | Administrative & support | 2009 |
| Knutsford Property Developments Limited | Construction | 2025 |
| KO Decorators Ltd | Construction | 2023 |
| KO Flooring NW Limited | Construction | 2020 |
| KO Group Limited | Hospitality | 2025 |
| KO Hospitality Limited | Wholesale & retail | 2024 |
| KO Nutrition Limited | Wholesale & retail | 2019 |
| KO8 Fitness Limited | Wholesale & retail | 2014 |
| Koamite Limited | Financial services | 2024 |
| Koat Innovation Limited | Professional & scientific | 2015 |
| Kobalt Services Ltd | Construction | 2019 |
| Kobani Properties Ltd | Construction | 2026 |
| Kobey&Co. Ltd | Other services | 2026 |
| Koboy Ltd | Construction | 2025 |
| Kochanowski Consulting Ltd | Professional & scientific | 2024 |
| Kochhar Ltd | Administrative & support | 2012 |
| Kodev Limited | Information & communication | 2019 |
| Kodymed Ltd | Professional & scientific | 2021 |
| Koka Ltd | Real estate | 2023 |
| Kokatyko Ltd | Professional & scientific | 2026 |
| Kokera Limited | Transport & logistics | 2016 |