| KK Aesthetics Ltd | Health & social care | 2018 |
| KK Construct Ltd | Construction | 2025 |
| KK Optics Limited | Professional & scientific | 2013 |
| KK Square Properties Ltd | Real estate | 2024 |
| KK Top Ltd | Wholesale & retail | 2026 |
| KK Trading Subsidiary Ltd | Wholesale & retail | 2023 |
| KK Unique Creations Ltd | Wholesale & retail | 2024 |
| KKB Construction Limited | Construction | 2018 |
| KKD Services Ltd | Other services | 2025 |
| Kkfunnels Ltd | Professional & scientific | 2026 |
| KKK Property Management Ltd | Real estate | 2025 |
| KKM IT Consulting Ltd | Information & communication | 2016 |
| KKN Developments Limited | Construction | 2016 |
| KKP Pharma Ltd | Health & social care | 2025 |
| KKP Retail Ltd | Wholesale & retail | 2023 |
| KKR Medical Ltd | Health & social care | 2022 |
| KKR Professionals Ltd | Education | 2013 |
| KKR Property Ventures Limited | Real estate | 2020 |
| KKR Ventures Limited | Professional & scientific | 2018 |
| Kkri Estates Ltd | Real estate | 2022 |
| Kkross Construction Ltd | Construction | 2024 |
| KKS Properties Ltd | Real estate | 2013 |
| Kksc Property Limited | Real estate | 2017 |
| Kksc Solutions Limited | Professional & scientific | 2011 |
| KKV (UK) Limited | Wholesale & retail | 1983 |
| KKV Ltd | Wholesale & retail | 2004 |
| Kkzz Limited | Real estate | 2023 |
| KL Business Support Services Ltd | Professional & scientific | 2026 |
| Klarox Ltd | Construction | 2019 |
| Klarss Commercial Cleaning Ltd | Administrative & support | 2024 |
| Klass Surgery Limited | Health & social care | 2018 |
| Klasse & Classic Ltd | Wholesale & retail | 2024 |
| Kleio Films Limited | Information & communication | 2015 |
| Klementine Services UK Limited | Wholesale & retail | 2017 |
| Kler Transport Ltd | Transport & logistics | 2020 |
| Klevas Consulting Ltd | Professional & scientific | 2007 |
| Klevas Limited | Administrative & support | 2019 |
| KLG Global Limited | Wholesale & retail | 2016 |
| Klincare Ltd | Health & social care | 2024 |
| Klinkaara Global Ltd | Information & communication | 2025 |
| Kloud House Ltd | Wholesale & retail | 2024 |
| KM Auto Management Ltd | Wholesale & retail | 2024 |
| KM Capital Holdings Ltd | Professional & scientific | 2016 |
| KM Chicken Ltd | Wholesale & retail | 2018 |
| KMA Holdings Limited | Extraterritorial | 2015 |
| KMB Construction Ltd | Construction | 2017 |
| KMB Investments Ltd | Financial services | 2020 |
| KMD Global Limited | Manufacturing | 2002 |
| Kmdac Ltd | Health & social care | 2019 |
| Kmdr Agri Services Limited | Agriculture & fishing | 2009 |
| KMG Circle Limited | Administrative & support | 2025 |
| Kmjb Limited | Other services | 2020 |
| KML Contracts Ltd | Professional & scientific | 2016 |
| KMN Group Ltd | Professional & scientific | 2025 |
| Kmpbit Limited | Information & communication | 2026 |
| Kmpt Group Ltd | Wholesale & retail | 2025 |
| Kmpt Health Ltd | Health & social care | 2026 |
| Kmsp Capital Limited | Real estate | 2009 |
| KMV Properties Ltd | Real estate | 2020 |
| Kmvmedia Ltd | Professional & scientific | 2025 |
| Kmvt Real Estate Limited | Real estate | 2024 |
| KMY Hospitality Ltd | Hospitality | 2026 |
| KMY Solutions Ltd | Manufacturing | 2026 |
| Kmyos Management Limited | Health & social care | 2017 |
| KMZ Management Services Limited | Professional & scientific | 2017 |
| KN Star Interiors Ltd | Construction | 2014 |
| KN Wise Mortgages Ltd | Financial services | 2025 |
| KNA Trading Limited | Wholesale & retail | 2019 |
| Knab Consulting Ltd | Information & communication | 2015 |
| Knac Properties Limited | Real estate | 2014 |
| Knap Consultancy Limited | Information & communication | 2011 |
| Knav Advisory Limited | Professional & scientific | 2018 |
| Knav Limited | Professional & scientific | 1996 |
| Knav Services Limited | Professional & scientific | 2020 |
| KNC Properties Limited | Real estate | 2019 |
| Kneja Holdings Ltd | Other services | 2019 |
| Kneja Investments Ltd | Real estate | 2019 |
| Kneja Packaging Ltd | Wholesale & retail | 2013 |
| Kneja Properties Ltd | Real estate | 2021 |
| Knetic Fitness Limited | Health & social care | 2025 |
| Knexus Emea Limited | Administrative & support | 1998 |
| Kngs Ground Estates Limited | Households | 2025 |
| Knight Design Innovation Limited | Professional & scientific | 2015 |
| Knight Home Living Limited | Wholesale & retail | 2023 |
| Knight Retail Limited | Wholesale & retail | 2024 |
| Knight Security Services Limited | Administrative & support | 1997 |
| Knightel Limited | Wholesale & retail | 1987 |
| Knightingale Estates Limited | Real estate | 2004 |
| Knightingale Properties Limited | Real estate | 2004 |
| Knighton Hearth Limited | Real estate | 2026 |
| Knights & Company Consultancy Limited | Professional & scientific | 2012 |
| Knights of Harrow Ltd. | Real estate | 2010 |
| Knights of Éire Limited | Other services | 2019 |
| Knightsbridge Asset Holdings Ltd | Financial services | 2022 |
| Knightsbridge Asset Portfolio Ltd | Real estate | 2014 |
| Knightsbridge Cafe Limited | Hospitality | 2007 |
| Knightsbridge Cubrick Work Limited | Construction | 2025 |
| Knightsbridge Finance (London) Ltd. | Financial services | 2017 |
| Knightsbridge Finance Holdings (London) Ltd | Financial services | 2023 |
| Knightsbridge Land Ltd | Real estate | 2019 |