| Kelston Actuation Limited | Professional & scientific | 2016 |
| Kelston Consulting Ltd | Professional & scientific | 2015 |
| Kelston Controls Limited | Extraterritorial | 2010 |
| Kelston Inventory Company Ltd | Other services | 2013 |
| Kelston Mews Westbury on Trym Management Company Limited | Households | 2007 |
| Kelston Properties 2 Limited | Construction | 2005 |
| Kelston Sparkes (Group) Limited | Administrative & support | 2013 |
| Kelston Sparkes Commercial Limited | Construction | 2021 |
| Kelston Sparkes Contractors Limited | Construction | 1974 |
| Kelston Sparkes Holdings Limited | Financial services | 1979 |
| Kelston Sparkes Quarry Services Limited | Administrative & support | 2023 |
| Keltob Ltd | Wholesale & retail | 2025 |
| Kelz Motorcycle Training Bristol Ltd | Education | 2025 |
| Kember Associates Limited | Professional & scientific | 1992 |
| Kembery Antique Clocks Limited | Wholesale & retail | 2002 |
| Kembery Solutions Limited | Professional & scientific | 2025 |
| Kemble Building Contractors Limited | Construction | 2015 |
| Kemble Commercial Services Limited | Professional & scientific | 2018 |
| Kembrey Contractors Limited | Construction | 1973 |
| Kembrey Developments Limited | Construction | 1978 |
| Kembrey Property Limited | Real estate | 2025 |
| Kemcon Ltd | Construction | 2019 |
| Kemdoc Limited | Construction | 2023 |
| Kemi’S African Market Ltd | Wholesale & retail | 2025 |
| Kemp Carpets Ltd | Construction | 2006 |
| Kemp Property Management Limited | Real estate | 2025 |
| Kempin Limited | Wholesale & retail | 2016 |
| Kempley Holdings Ltd | Extraterritorial | 2024 |
| Kemps Ltd | Wholesale & retail | 1997 |
| Kempton Grove Limited | Households | 2023 |
| Kemran Limited | Hospitality | 2019 |
| Kemtile Limited | Construction | 1979 |
| KEN Biggs Contractors Limited | Construction | 1967 |
| KEN Biggs Limited | Construction | 1980 |
| KEN Sangster & Associates Limited | Professional & scientific | 2009 |
| KEN Stephens Enterprises Limited | | 1958 |
| KEN Wade Associates Limited | Professional & scientific | 2022 |
| Kenami Scents Ltd | Manufacturing | 2025 |
| Kendal JAY Services Limited | Wholesale & retail | 2009 |
| Kendall Bricklaying Ltd | Construction | 2021 |
| Kenderzon Ltd | Wholesale & retail | 2018 |
| Kendo Electrical Limited | Construction | 2023 |
| Kendrick Electrical Ltd | Construction | 2016 |
| Kendrick Group Limited | Financial services | 2026 |
| Kenect (South West) Limited | Administrative & support | 2021 |
| Kenect Recruitment (South West) Limited | Administrative & support | 1997 |
| Kenen Consulting Limited | Wholesale & retail | 2018 |
| Keneudo Limited | Health & social care | 2026 |
| Kenge Property Ltd | Extraterritorial | 2026 |
| Kenham House Management RTM Company Ltd | Households | 2019 |
| Kenmar Holdings Limited | Financial services | 2019 |
| Kenn Project Management Limited | Construction | 2018 |
| Kennedy Landscapes Design and Build Ltd | Professional & scientific | 2025 |
| Kennedy's Boxing Club C.I.C. | Arts & recreation | 2025 |
| Kennels Green Maintenance (Tockington) Limited | Administrative & support | 1966 |
| Kennerley Productions Limited | Information & communication | 2003 |
| Kenneth and Edwards Limited | Professional & scientific | 2009 |
| Kennett Enterprises Limited | Professional & scientific | 2016 |
| Kennett Group Limited | Health & social care | 2020 |
| Kenny Contractors Limited | Construction | 2022 |
| Kenny Joseph Barber Ltd | Other services | 2022 |
| Kensaljuicebar Ltd | Wholesale & retail | 2026 |
| Kensington & Chelsea Lettings Ltd | Real estate | 2017 |
| Kensington Chapel (Bath) Management Company Limited | Households | 2010 |
| Kensington Systems Ltd | Construction | 2010 |
| Kensington UK Holdings Ltd | Administrative & support | 2015 |
| Kensoray Ltd | Professional & scientific | 2022 |
| Kent Imaging Diagnostic Services Limited | Health & social care | 2012 |
| Kent Manage Ltd | Other services | 2021 |
| Kentdesigns Limited | Administrative & support | 1979 |
| Kento Enterprise UK Ltd | Wholesale & retail | 2026 |
| Kenton Manufacturing Limited | Manufacturing | 2001 |
| Kenton School Services Limited | Administrative & support | 1999 |
| Kenton Technical Products Limited | Manufacturing | 1986 |
| Kentplumbing Ltd | Extraterritorial | 2006 |
| Kentro Beauty Limited | Other services | 2019 |
| Kenwyn (ST Mary's) Management Company Limited | Households | 2023 |
| KEO Consulting Limited | Real estate | 1957 |
| Keon IT Limited | Information & communication | 2012 |
| Keona's Future Childcare Limited | Health & social care | 2024 |
| Keplar Norwood Limited | Administrative & support | 2010 |
| Keppel Campbell Associates Limited | Professional & scientific | 2015 |
| Keppel Homes Limited | Professional & scientific | 2006 |
| Kepranich Developments Limited | Construction | 1996 |
| Kerala Choice Limited | Hospitality | 2025 |
| Kerala Curry Limited | Hospitality | 2024 |
| Kerala Hotels Ltd | Hospitality | 2021 |
| Keratin Hair and Beauty Limited | Other services | 1999 |
| Keratocare Limited | Health & social care | 2022 |
| Kerb to Coast Ltd | Administrative & support | 2015 |
| Kerbright Management Ltd | Administrative & support | 2026 |
| Kerbside Repairs Limited | Wholesale & retail | 2002 |
| Kerem Emirhan Limited | Real estate | 2017 |
| Keria Ltd | Administrative & support | 2016 |
| Kernel Impex LP | | 2015 |
| Kerning Ltd | Wholesale & retail | 2024 |
| Kernow Cottages Ltd | Real estate | 2021 |
| Kernow Veterinary Group Limited | Extraterritorial | 2013 |
| Keron Limited | Households | 1974 |
| Kerr & Scott Properties Ltd | Real estate | 2019 |