| Kandus Kitchen Ltd | Hospitality | 2025 |
| Kanguchi Ltd | Health & social care | 2020 |
| Kanha Enterprise Limited | Professional & scientific | 2021 |
| Kanika Associates Ltd | Real estate | 2020 |
| Kankal Property Investment Limited | Real estate | 2025 |
| Kanodia Ventures Limited | Real estate | 2021 |
| Kanom Consultancy Limited | Construction | 2019 |
| Kapak International Company Limited | Manufacturing | 2021 |
| Kapha Limited | Education | 2020 |
| Kapital Regnskap UK Ltd | Professional & scientific | 2023 |
| Kapoor Property Investments Ltd | Real estate | 2024 |
| Karah Consulting Ltd | Professional & scientific | 2018 |
| Karandila Ltd | Transport & logistics | 2014 |
| Karen Street Limited | Professional & scientific | 2014 |
| Karens Care Ltd | Households | 2019 |
| Karibu Properties Limited | Real estate | 2018 |
| Karishma Health Scans Ltd | Health & social care | 2023 |
| Karissa Holly Marsh Limited | Extraterritorial | 2025 |
| Karlon Ltd | Manufacturing | 2013 |
| Karmaa Kitchens Limited | Hospitality | 2025 |
| Karmaqueen Ltd | Wholesale & retail | 2019 |
| Karo Solutions Ltd | Construction | 2024 |
| Karsan Bava & Sons Limited | Wholesale & retail | 2025 |
| Karthik Enterprises Limited | Education | 2010 |
| Karun Soni Art Ltd | Arts & recreation | 2022 |
| Karvia Organics Ltd | Administrative & support | 2020 |
| Kase Group Ltd | Construction | 2026 |
| Kasei Change Management Consulting Ltd | Professional & scientific | 2011 |
| Kasey Solutions Limited | Information & communication | 2016 |
| Kash Herts Ltd | Transport & logistics | 2022 |
| Kass Autos Ltd | Wholesale & retail | 2022 |
| KAT Street Foods Limited | Hospitality | 2021 |
| KAT Tmba Limited | Health & social care | 2021 |
| Kate Flatt Projects | Arts & recreation | 2012 |
| Kate Malcomess Consultancy Limited | Professional & scientific | 1999 |
| Kate Raymond Consulting Ltd | Administrative & support | 2014 |
| Kate Sinden Limited | Information & communication | 2012 |
| Katies Station Cafe Ltd | Hospitality | 2014 |
| Kaung Consultancy Ltd | Information & communication | 2013 |
| Kava JDN Properties Ltd | Real estate | 2023 |
| Kave Immersive Ltd | Professional & scientific | 2018 |
| Kavyaa Accountancy Limited | Professional & scientific | 2015 |
| Kawita Computer Consultancy Limited | Information & communication | 1997 |
| KAY JAY Associates Limited | Professional & scientific | 2014 |
| KAY Plus Limited | Professional & scientific | 2013 |
| Kay's Kars Limited | Wholesale & retail | 2018 |
| Kaya Accountants Ltd | Extraterritorial | 2020 |
| Kaya Estates Ltd | Real estate | 2024 |
| Kaycee Properties Limited | Real estate | 2016 |
| Kayed Limited | Information & communication | 2013 |
| Kayi Sports Limited | Arts & recreation | 2020 |
| Kaylev Consulting Ltd | Professional & scientific | 2023 |
| Kay’S Kafe Ltd | Hospitality | 2025 |
| Kaza Property Solutions Ltd | Construction | 2016 |
| Kaze Consultancy Ltd | Information & communication | 2025 |
| Kazerquest Ltd | Information & communication | 2021 |
| Kazmi Amenity Ltd | Transport & logistics | 2024 |
| Kazmi Traders Ltd | Wholesale & retail | 2023 |
| KB Bookkeeping Services Ltd | Professional & scientific | 2021 |
| KB Facilities Management Group Limited | Administrative & support | 2011 |
| Kbling Limited | Information & communication | 2004 |
| Kbpharma Ltd | Health & social care | 2024 |
| KBSB5 Ltd | Real estate | 2024 |
| KBZ 2 Limited | Real estate | 2017 |
| KBZ Ltd | Real estate | 2011 |
| KC Residency Ltd | Real estate | 2023 |
| KCB Consultants Limited | Information & communication | 1998 |
| KCF Consultants Limited | Professional & scientific | 2014 |
| KD Distribution Ltd | Wholesale & retail | 2024 |
| KD Global Holdings Ltd | Financial services | 2026 |
| KD Grill Ltd | Hospitality | 2025 |
| KD Scaffolding Ltd | Construction | 2016 |
| KD Wholesale Cash & Carry Ltd | Wholesale & retail | 2019 |
| KDM Corporations Ltd | Wholesale & retail | 2020 |
| KDM Logistics Consultancy Ltd | Professional & scientific | 2024 |
| Kdmb Ltd | Professional & scientific | 2023 |
| Kdot Solutions Ltd | Construction | 2018 |
| KDV International Group LLP | | 2023 |
| Keash Properties (Bushey) Ltd | Real estate | 2018 |
| Keash Properties (Craven Street) Limited | Real estate | 2019 |
| Keash Properties (Happy Hour) Limited | Real estate | 2020 |
| Keash Properties (Harrow Management) Limited | Real estate | 2023 |
| Keash Properties (Harrow) Limited | Real estate | 2020 |
| Keash Properties (High Street) Ltd | Real estate | 2019 |
| Keash Properties (Hotels) Limited | Financial services | 2020 |
| Keash Properties (Merry Hill) Limited | Real estate | 2022 |
| Keash Properties (Safari) Limited | Real estate | 2021 |
| Keash Properties (Shepherd’S Bush) Limited | Real estate | 2024 |
| Keash Properties (Sligo House) Limited | Real estate | 2021 |
| Keash Properties (Stanmore) Limited | Real estate | 2018 |
| Keash Properties (Watford) Limited | Real estate | 2019 |
| Keash Properties Limited | Real estate | 2005 |
| Keates Consulting Limited | Professional & scientific | 2018 |
| Kebabish Catering Ltd | Hospitality | 2025 |
| Keconi Ltd | Professional & scientific | 2018 |
| Keda Services Limited | Construction | 2007 |
| Keep IT Rural Ltd | Hospitality | 2024 |
| Keepfit Massive Ltd | Other services | 2018 |
| Keida Skin Ltd | Wholesale & retail | 2025 |
| Kejriwal Limited | Information & communication | 2023 |