| KC Engineering Services Ltd | Manufacturing | 2025 |
| KC Joinery & Construction Ltd | Construction | 2025 |
| KC Management Solutions (EM) Ltd | Financial services | 2021 |
| KC Properties & Lettings Ltd | Real estate | 2024 |
| KC Rentals Ltd | Real estate | 2022 |
| Kc's Cafe & COB Shop Ltd | Hospitality | 2024 |
| KCA Business Services Ltd | Professional & scientific | 2024 |
| KCA Derry Transport Limited | Information & communication | 2003 |
| KCD Apartments Ltd | Hospitality | 2019 |
| KCD Engineering Limited | Professional & scientific | 2006 |
| KCE FM Holdings Limited | Financial services | 2025 |
| KCE FM Limited | Administrative & support | 2007 |
| Kchs Properties Limited | Real estate | 2026 |
| KCL Care Limited | Health & social care | 2013 |
| KCM Property Investments Ltd | Households | 2018 |
| Kcmm Projects Limited | Professional & scientific | 2025 |
| KCP Estates Limited | Real estate | 2017 |
| Kcreations Ltd | Wholesale & retail | 2021 |
| KCS Solutions Ltd | Construction | 2017 |
| Kcsg Property Ltd | Real estate | 2026 |
| KD Konsult Limited | Administrative & support | 2018 |
| KD Publishers Pro Ltd | Information & communication | 2024 |
| KD3 Accountancy Services Ltd | Financial services | 2011 |
| KD3 Financial Consultancy Limited | Professional & scientific | 2018 |
| KDC Heanor Limited | Construction | 2022 |
| KDE Solutions Ltd | Transport & logistics | 2025 |
| KDG Estates Limited | Real estate | 2019 |
| KDG M&E Group Limited | Construction | 2012 |
| KDM Procurement Limited | Professional & scientific | 2016 |
| Kdms Holdings Ltd | Real estate | 2026 |
| KDS Furniture Ltd | Wholesale & retail | 2019 |
| KDS GAS and Plumbing Ltd | Construction | 2020 |
| KDS Lifts Ltd | Manufacturing | 2021 |
| KDS Maintenance Ltd | Construction | 2025 |
| KDS Organisation Ltd | Wholesale & retail | 2025 |
| Kdsg Developments Ltd | Real estate | 2023 |
| Kdtech Limited | Information & communication | 2018 |
| KDW Holdings Limited | Financial services | 2022 |
| KE Rado Ltd | Real estate | 2019 |
| KE Software (UK) Limited | Information & communication | 2000 |
| KE Steps Limited | Real estate | 2020 |
| KE Steps Pre-School Limited | Education | 2014 |
| KE UK Consultancy Limited | Professional & scientific | 2025 |
| KEA Property (NE) Limited | Real estate | 2026 |
| Kealar Limited | Administrative & support | 1977 |
| Kearney Hogg Motorcycles Ltd | Wholesale & retail | 2019 |
| Kearney Rail Services Ltd | Construction | 2019 |
| Keba Samma Ltd | Health & social care | 2023 |
| Kebab Heaven Commercial Limited | Hospitality | 2025 |
| Kebab Heaven Limited | Hospitality | 2025 |
| Kebanos Ventures Limited | Hospitality | 2026 |
| Kebria Flora UK Ltd | Wholesale & retail | 2017 |
| Keburger Ltd | Hospitality | 2015 |
| Kedar K Ltd | Wholesale & retail | 2025 |
| Keden Development Ltd | Real estate | 2002 |
| Kedleston Events Ltd | Hospitality | 2025 |
| Kedris Ltd | Information & communication | 2014 |
| Kedron Properties Ltd | Real estate | 2017 |
| KEE Mediation Ltd | Professional & scientific | 2020 |
| Keeavnt Ltd | Real estate | 2023 |
| Keeling Holdings Limited | Administrative & support | 2013 |
| Keen Accommodations Ltd | Hospitality | 2022 |
| Keep Active Therapy Limited | Health & social care | 2023 |
| Keep Karma Art Limited | Arts & recreation | 2017 |
| Keepers Holdings Ltd | Financial services | 2022 |
| Keills LPI Limited Partnership | | 2008 |
| Keills Property Fund Limited Partnership 1 | | 2005 |
| Keills Trelawny Limited Partnership | | 2006 |
| Keirs Consultancy Limited | Real estate | 2018 |
| Keishas Ltd | Wholesale & retail | 2025 |
| Keith Butler Limited | Financial services | 2014 |
| Keith Hall Franchising Limited | Other services | 1986 |
| Keith Sheriston Associates Limited | Professional & scientific | 2007 |
| Keith Simpson Associates Ltd | Professional & scientific | 1992 |
| Keith Stockdale and Company Limited | Financial services | 2017 |
| Keith Willis Associates Limited | Professional & scientific | 1996 |
| Keithrupondoh Ltd | Transport & logistics | 2025 |
| Kekus Ltd | Information & communication | 2015 |
| KEL Cooke Music Ltd | Arts & recreation | 2024 |
| KEL Star Properties Limited | Construction | 2025 |
| Kelcai Group Ltd | Administrative & support | 2022 |
| Kelch Precision Ltd | Manufacturing | 2020 |
| Kelham Developments Limited | Construction | 2016 |
| Kelham Property Ltd | Real estate | 2026 |
| Kelham Property Management Ltd | Real estate | 2014 |
| Kelle Oldham Ltd | Information & communication | 2012 |
| Kelley Property Ltd | Real estate | 2017 |
| Kello Construction Limited | Professional & scientific | 2017 |
| Kelloz Realty Ltd | Real estate | 2022 |
| Kelly Grab Hire Ltd | Water & waste | 2014 |
| Kelly Laher Consulting Ltd | Professional & scientific | 2023 |
| Kelly's Nails Spa Ltd | Other services | 2024 |
| Kels Planning Limited | Administrative & support | 2026 |
| Kelsall & Evans Limited | Real estate | 1972 |
| Kelsey's Kleening Limited | Administrative & support | 2016 |
| Kelso Jones Recruitment Limited | Administrative & support | 2004 |
| Kelso Retail Ltd | Wholesale & retail | 2025 |
| Kelsyb Ltd | Hospitality | 2026 |
| Kelton Investments Limited | Real estate | 2023 |
| Kelton Properties Ltd | Real estate | 2018 |