| Kanest Limited | Administrative & support | 2023 |
| Kangley Bridge Road (Sydenham) RTM Company Limited | Real estate | 2019 |
| Kanpai London Ltd. | Manufacturing | 2016 |
| Kanvas Medical Bromley Ltd | Health & social care | 2023 |
| KAO Care Services Ltd | Health & social care | 2024 |
| Kapa 75 Limited | Administrative & support | 2021 |
| Kapatec Limited | Information & communication | 2005 |
| Kara Komur Limited | Hospitality | 2024 |
| Kara Plastering & Rendering Ltd | Construction | 2024 |
| Karabs Baby Care Ltd | Health & social care | 2022 |
| Karaman Associates Limited | Professional & scientific | 2015 |
| Karaman Services Limited | Real estate | 2021 |
| Karatas Services Ltd | Information & communication | 2020 |
| Karen Court (Bromley) Management Limited | Households | 1985 |
| Karen Richards Consulting Limited | Professional & scientific | 2025 |
| Karlina Marina Limited | Extraterritorial | 2023 |
| Karmylassos UK Ltd | Extraterritorial | 2024 |
| Karsiyaka Carlos Limited | Extraterritorial | 2022 |
| Karyatis Court Management Limited | Households | 2000 |
| Kasper MEP Consultancy Ltd | Professional & scientific | 2021 |
| Kastell Homes Limited | Hospitality | 2017 |
| Katana Software Limited | Professional & scientific | 2015 |
| Kate & Sidney PIE Ltd | Real estate | 2021 |
| Kate Matthews Digital Limited | Administrative & support | 2022 |
| Katherine Court (Honor Oak Road) Management Co Limited | Households | 1966 |
| Katherine Feeney Property Management Ltd | Households | 2026 |
| Kathleen B Clark Ltd | Administrative & support | 2019 |
| Kathryn Cornish Learning and Development Limited | Professional & scientific | 2015 |
| Kathryn Mercer Limited | Professional & scientific | 2013 |
| Katib Iscandari Ltd | Real estate | 2025 |
| Katie Duffy Limited | Professional & scientific | 2023 |
| Katie Perrior Limited | Administrative & support | 2017 |
| Katisa Limited | Health & social care | 2014 |
| Katj Limited | Administrative & support | 2009 |
| Katya Cleaning Limited | Administrative & support | 2025 |
| Kavan Drive Ltd | Real estate | 2025 |
| Kavan Limited | Real estate | 2016 |
| Kaveh Golestan Estate Limited | Wholesale & retail | 2015 |
| Kawe Advisory Ltd | Wholesale & retail | 2024 |
| Kaya Knox Holdings Ltd | Financial services | 2026 |
| Kaya Prestige Properties Ltd | Real estate | 2026 |
| Kayael Holdings Limited | Other services | 2015 |
| Kayalar Properties Ltd | Real estate | 2025 |
| Kaycee Records and Entertainment Limited | Information & communication | 2021 |
| Kayseri Investment Properties Ltd | Real estate | 2025 |
| KB Design Alternative Ltd | Professional & scientific | 2025 |
| KB Elite Ltd | Professional & scientific | 2025 |
| KB Healthcare Ltd | Health & social care | 2012 |
| KB Medical Advisory Limited | Education | 2019 |
| KB Professional Ltd | Administrative & support | 2023 |
| Kbotics Ltd | Manufacturing | 2024 |
| Kc&Kl Limited | Real estate | 2023 |
| Kcab Ltd | Transport & logistics | 2024 |
| Kccm Consulting Limited | Real estate | 2015 |
| Kcip Group (Birbetts) Limited | Construction | 2026 |
| Kcip Group Ltd | Real estate | 2024 |
| KD Secure Ltd | Administrative & support | 2025 |
| KDE Electrical Services Ltd. | Construction | 2009 |
| Kebulaw Limited | Professional & scientific | 2020 |
| Kecks Ltd | Wholesale & retail | 2017 |
| Kedith Ltd | Financial services | 2023 |
| Keemsherry Limited | Health & social care | 2024 |
| Kegites Club International UK Ltd | Administrative & support | 2023 |
| Keira London Ltd | Other services | 2021 |
| Keith Park Property Limited | Real estate | 2019 |
| Kekik Restaurant Ltd | Hospitality | 2021 |
| Keles Fish and Chips Limited | Hospitality | 2019 |
| Keljjovic Limited | Real estate | 2024 |
| Kelsey Park Mansion Limited | Households | 2004 |
| Kema Industries Ltd | Wholesale & retail | 2025 |
| Kemkol Healthcare Ltd | Health & social care | 2022 |
| Kemnal Court Management Company Limited | Real estate | 2008 |
| Kemsley Field (Management) Company Limited | Households | 2005 |
| KEN Cahani Plumbing & Heating Limited | Construction | 2018 |
| Kena Networks Ltd | Administrative & support | 2025 |
| Kendrick-Street Ltd. | Information & communication | 2019 |
| Kenley Grill Kebab Ltd | Hospitality | 2025 |
| Kensai Ltd | Information & communication | 2017 |
| Kensington House Hemel Management Company Limited | Households | 2015 |
| Kensington Park Road Limited | Administrative & support | 2018 |
| Kent & South East Builders Ltd | Construction | 2025 |
| Kent Association of Training Organisations (Kato) CIC | Education | 2007 |
| Kent Badminton Limited | Arts & recreation | 2002 |
| Kent Computing Ltd | Information & communication | 2011 |
| Kent GAS Boiler Services Limited | Energy | 2007 |
| Kent Group Limited | Wholesale & retail | 2000 |
| Kent House Properties and Investment Ltd | Real estate | 2016 |
| Kent Paints Limited | Wholesale & retail | 2024 |
| Kent Payroll Services Limited | Administrative & support | 2010 |
| Kent Pressure Washing Services Ltd | Administrative & support | 2026 |
| Kent Waste Group Ltd | Water & waste | 2025 |
| Kentcast Limited | Arts & recreation | 2023 |
| Kentex Building Services Limited | Administrative & support | 1997 |
| Kentex Group Limited | Professional & scientific | 1998 |
| Kentex Services LLP | | 2006 |
| Kentfireplace Ltd | Wholesale & retail | 2025 |
| Kentish Opera | Arts & recreation | 1993 |
| Kerasec Ltd | Information & communication | 2025 |
| Kersey Flooring Limited | Construction | 2025 |
| Kesar & Co Ltd. | Professional & scientific | 2012 |