| KND Luxury Homes Ltd | Financial services | 2025 |
| Kndj Ltd | Wholesale & retail | 2025 |
| KNECT4 Limited | Hospitality | 2025 |
| Knight Castle Limited | Real estate | 2015 |
| Knight Home Construction Limited | Construction | 2023 |
| Knight Home Development Limited | Construction | 2023 |
| Knight Homes Group Limited | Financial services | 2023 |
| Knight Innovation Homes Ltd | Construction | 2015 |
| Knight Line Chauffeurs Ltd | Transport & logistics | 2025 |
| Knight Property Maintenance Ltd | Construction | 2021 |
| Knights Consulting Limited | Professional & scientific | 2004 |
| Knights Land Limited | Real estate | 2023 |
| Knightsbridge Property Services Limited | Construction | 1991 |
| Knightsbridge Roofing Limited | Construction | 2018 |
| Knightwood Court (Brockenhurst) Limited | Households | 1990 |
| Knives Down Boots UP Community Interest Company | Education | 2024 |
| KNK Take Away Ltd | Hospitality | 2018 |
| KNL Powell Limited | Professional & scientific | 2024 |
| Knoll Lane (Ashford) Management Company Limited | Households | 2014 |
| Knot's Yard Property Management Limited | Households | 2007 |
| Knowco Limited | Information & communication | 2010 |
| Knowledge 4 Practice CIC | Education | 2025 |
| Knowledge and Education Limited | Education | 2022 |
| Knowledge and Practice | Education | 2017 |
| KNS Assets Limited | Real estate | 2021 |
| KNT Retail Ltd | Wholesale & retail | 2018 |
| Knutsford Apartment Management Company Limited | Households | 1991 |
| Knvp Accountants and Tax Consultants Ltd | Professional & scientific | 2024 |
| KO and Partners Limited | Professional & scientific | 2004 |
| Kodo Limited | Real estate | 2017 |
| KOF Town Ventures Limited | Financial services | 2025 |
| Koinonia Healthcare Limited | Administrative & support | 2024 |
| Kojo Short Lets Limited | Hospitality | 2025 |
| Koko Beauty Ltd | Other services | 2018 |
| Kolawole Julius Limited | Professional & scientific | 2018 |
| Kollington Fisheries UK Ltd | Wholesale & retail | 2020 |
| Koly Scaffold Limited | Construction | 2012 |
| KOM Consulting Ltd | Professional & scientific | 2014 |
| Komar Stores Limited | Wholesale & retail | 2022 |
| Komo Consulting Ltd | Information & communication | 2022 |
| Komo Fabrics Limited | Wholesale & retail | 2023 |
| Komplete Interiors Ltd | Construction | 2013 |
| Komplete Kontent Ltd | Information & communication | 2025 |
| Konduz Ltd | Wholesale & retail | 2020 |
| Kongu UK Ltd | Hospitality | 2026 |
| Kongunadu Restaurant Ltd | Hospitality | 2024 |
| Konig&Weber Services GMB Ltd | Information & communication | 2025 |
| Konix Limited | Construction | 2012 |
| Konrad General Building Ltd | Construction | 2012 |
| Kopish Limited | Arts & recreation | 2019 |
| Kore Plumbers Ltd | Construction | 2019 |
| Koru Development Limited | Professional & scientific | 2009 |
| Kosan Village Limited | Real estate | 2025 |
| Kosh Studios Ltd. | Information & communication | 2017 |
| Kosi Ltd | Health & social care | 2013 |
| Kosibah Creations Limited | Manufacturing | 2002 |
| Kotarja & Co Law Ltd | Professional & scientific | 2025 |
| Kothu 3 Ltd | Hospitality | 2026 |
| Kotoko Mini Market Ltd | Wholesale & retail | 2013 |
| Koylaa Ltd | Wholesale & retail | 2018 |
| Kozeli Property Partners Ltd | Real estate | 2025 |
| Kozin Bathroom Renovations Ltd | Construction | 2025 |
| KP (Macclesfield) Residents Management Company Limited | Households | 2022 |
| KP Business Ltd | Professional & scientific | 2017 |
| KP Eagle Builders Ltd | Construction | 2024 |
| KP Heating & Plumbing Ltd | Construction | 2012 |
| KP Improvements Limited | Construction | 2020 |
| KP Property London Limited | Real estate | 2023 |
| KP Scaffolding Limited | Construction | 2014 |
| KP Trans Service Ltd | Transport & logistics | 2016 |
| Kpbsa Limited | Extraterritorial | 2016 |
| Kpdck Catering Ltd | Hospitality | 2025 |
| KPG Simpson Limited | Manufacturing | 2025 |
| KPI Ministries | Education | 2012 |
| KPN Estates Ltd | Construction | 2026 |
| KPS Fast Food Limited | Hospitality | 2021 |
| Kpshi Services Ltd | Extraterritorial | 2024 |
| KR Civil Engineering Ltd | Construction | 2013 |
| KR Deco & Catering Limited | Hospitality | 2023 |
| Kr-Avalta Ltd | Wholesale & retail | 2018 |
| KRA Management Limited | Real estate | 2025 |
| Kraal Ltd | Information & communication | 2016 |
| Kraftwerkuk Ltd | Construction | 2026 |
| Kramasa Group Limited | Wholesale & retail | 2016 |
| Kratos Properties Limited | Real estate | 2016 |
| KRB Properties Limited | Construction | 2015 |
| KRD Group Corporation Ltd | Real estate | 2022 |
| Kreative Education Solution | Information & communication | 2009 |
| Kresteel Group Ltd | Manufacturing | 2025 |
| KRI Building & Construction Ltd | Construction | 2021 |
| Kricon Solutions Limited | Information & communication | 2008 |
| Krida Ltd | Construction | 2019 |
| Kris Builder Limited | Construction | 2015 |
| Krisdor- Trans Ltd | Transport & logistics | 2016 |
| Krish Business Service Ltd | Wholesale & retail | 2018 |
| Krish Express Retails Ltd | Wholesale & retail | 2022 |
| Krish Wholesale Ltd | Wholesale & retail | 2025 |
| Krishams Ltd | Wholesale & retail | 2023 |
| Krishmorgan Solicitors Ltd | Professional & scientific | 2023 |
| Krishna Properties Limited | Real estate | 2003 |