| Kelver Holdings Limited | Real estate | 2020 |
| Kelvin Cheatle Consulting Limited | Administrative & support | 2016 |
| Kelvin Court Property Management Company Limited | Households | 1964 |
| Kelvin Court RTM Company Limited | Households | 2024 |
| Kencost Properties Limited | Construction | 2025 |
| Kennedy Song Dusoir Limited | Administrative & support | 2016 |
| Kenneth Court Company Limited(The) | Hospitality | 1986 |
| Kenton Court RTM Co Ltd | Households | 2010 |
| Kereru Limited | Professional & scientific | 2023 |
| Kern Productions Limited | Information & communication | 2007 |
| KEW Accounting Limited | Professional & scientific | 2013 |
| KEW and KEW Classics Ltd | Real estate | 2022 |
| KEW and KEW Ltd | Real estate | 2016 |
| KEW and KEW Residential Ltd | Administrative & support | 2023 |
| KEW Aquatics Limited | Wholesale & retail | 2015 |
| KEW Beauty Studio and Academy Limited | Other services | 2025 |
| KEW Business Services Limited | Information & communication | 2007 |
| KEW Buttery Ltd | Real estate | 2022 |
| KEW Care Group Limited | Health & social care | 2008 |
| KEW Christmas Limited | Wholesale & retail | 2024 |
| KEW College | Education | 1982 |
| KEW Commodities Ltd | Financial services | 2014 |
| KEW Community Trust | Health & social care | 1983 |
| KEW Consult Limited | Professional & scientific | 2009 |
| KEW DRY Cleaners Ltd | Other services | 2026 |
| KEW Fete Community Interest Company | Arts & recreation | 2013 |
| KEW Foot Consultancy Limited | Professional & scientific | 2015 |
| KEW Football Academy Ltd | Arts & recreation | 2021 |
| KEW Frame Limited | Wholesale & retail | 2013 |
| KEW Garden Studios Ltd | Hospitality | 2020 |
| KEW Gardens Inn Limited | Hospitality | 2019 |
| KEW Gardens Property Limited | Real estate | 2010 |
| KEW Gardens Road Managements Limited | Households | 1956 |
| KEW Giggles Limited | Health & social care | 2024 |
| KEW Green (Bromsgrove) Limited | Hospitality | 2014 |
| KEW Green (Norwich Property) Limited | Hospitality | 2014 |
| KEW Green (Square) Limited | Hospitality | 2004 |
| KEW Green Convenience Stores Ltd | Wholesale & retail | 2025 |
| KEW Green Group Limited | Hospitality | 2014 |
| KEW Green Hotels (Ashford) Limited | Hospitality | 2014 |
| KEW Green Hotels (Birmingham LRG1) Limited | Hospitality | 2014 |
| KEW Green Hotels (Chester) Limited | Hospitality | 2014 |
| KEW Green Hotels (Colchester) Limited | Hospitality | 2014 |
| KEW Green Hotels (Derby/Nottingham) Limited | Hospitality | 2014 |
| KEW Green Hotels (Gatwick) Limited | Hospitality | 2006 |
| KEW Green Hotels (Haydock) Limited | Hospitality | 2014 |
| KEW Green Hotels (Ipswich LRG1) Limited | Hospitality | 2014 |
| KEW Green Hotels (Lancaster) Limited | Hospitality | 2014 |
| KEW Green Hotels (Leeds Brighouse) Limited | Hospitality | 2014 |
| KEW Green Hotels (Management) Limited | Hospitality | 2009 |
| KEW Green Hotels (Norwich LRG1) Limited | Hospitality | 2014 |
| KEW Green Hotels (Portsmouth LRG1) Limited | Hospitality | 2014 |
| KEW Green Hotels (Portsmouth) Limited | Hospitality | 2002 |
| KEW Green Hotels (Rochester) Limited | Hospitality | 2014 |
| KEW Green Hotels (Rugby) Limited | Hospitality | 2014 |
| KEW Green Hotels (Runcorn) Limited | Hospitality | 2014 |
| KEW Green Hotels (Stansted) Limited | Hospitality | 2002 |
| KEW Green Hotels (Stoke) Limited | Hospitality | 2014 |
| KEW Green Hotels (Swindon) Limited | Hospitality | 2014 |
| KEW Green Hotels (Taunton) Limited | Hospitality | 2014 |
| KEW Green Hotels (Wakefield LRG1) Limited | Hospitality | 2014 |
| KEW Green Hotels (Warrington) Limited | Hospitality | 2014 |
| KEW Green Hotels (Washington) Limited | Hospitality | 2014 |
| KEW Green Hotels (York) Limited | Hospitality | 2014 |
| KEW Green Intermediate Two Limited | Hospitality | 2014 |
| KEW Insights Ltd | Professional & scientific | 2024 |
| KEW Lodge Garages Management Co. Limited | Households | 2012 |
| KEW Lodge Management Co.Limited | Households | 1963 |
| KEW Marina Limited | Transport & logistics | 1989 |
| KEW Osteopaths Limited | Health & social care | 2003 |
| KEW Petroleum Ltd | Professional & scientific | 2017 |
| KEW Power Ltd | Energy | 2025 |
| KEW Rooms Ltd | Hospitality | 2026 |
| KEW Studio | Education | 1992 |
| KEW Townmead Management Company Limited | Households | 2004 |
| KEW Tree Wealth Limited | Financial services | 2024 |
| KEW Village Market Community Interest Company | Other services | 2012 |
| Kewauctions Ltd | Wholesale & retail | 2024 |
| Key Homes (GB) Limited | Hospitality | 2004 |
| Key Premier Limited | Professional & scientific | 2004 |
| Keyshield Securities Limited | Wholesale & retail | 2023 |
| KG International Properties Ltd | Real estate | 2020 |
| KH Heating Limited | Construction | 2011 |
| Kianu Solutions Limited | Information & communication | 2018 |
| Kick Ltd. | Education | 2003 |
| Kief Holdings Limited | Financial services | 2024 |
| Kilderk Inns Limited | Real estate | 1991 |
| Kimaya Diamonds Limited | Wholesale & retail | 2018 |
| Kimber House Management Company Limited | Real estate | 2018 |
| Kimchiland Limited | Hospitality | 2011 |
| Kimmeridge Real Estate Ltd | Real estate | 2015 |
| Kimmre Ltd | Extraterritorial | 2015 |
| Kindling Media Limited | Information & communication | 2019 |
| Kindness Research Foundation Limited | Education | 2014 |
| King's House School Enterprises Limited | Arts & recreation | 2010 |
| Kingdom Global Partners Ltd | Construction | 2016 |
| Kingdom Holdings Group Ltd. | Wholesale & retail | 2017 |
| Kingfisher Inns Ltd | Hospitality | 2024 |
| Kings Mews (Richmond) Management Company Limited | Real estate | 2006 |
| Kings Ride House Limited | Households | 1993 |