| Kattjen Ltd | Construction | 2020 |
| Kawak Ltd | Professional & scientific | 2013 |
| KBA Creative Limited | Administrative & support | 2019 |
| Kbcb Services Limited | Professional & scientific | 2024 |
| Kcaals (Kintsugi Community Advocacy Advice Language Services) Ltd | Professional & scientific | 2023 |
| Kcil Limited | Health & social care | 2007 |
| Kctc Ltd | Education | 1993 |
| KD Contracts Partnership Limited | Construction | 2016 |
| Keel Gardens Management Limited | Households | 2006 |
| Keepers Green (Graylingwell) Management Company Limited | Real estate | 2018 |
| Keiman Ltd | Other services | 2024 |
| Kellerman & SON T/A Playtime Coaches Ltd | Arts & recreation | 2013 |
| Kempton Court (Sunbury) Management Company Limited | Households | 1990 |
| Kenbury Associates Limited | Professional & scientific | 2011 |
| Kenmore(Kew Gardens)Residents Company Limited | Administrative & support | 1964 |
| Kent Farm Care Limited | Manufacturing | 2024 |
| Kentrip Ltd | Hospitality | 2022 |
| Kerridge Collective Limited | Professional & scientific | 2019 |
| Kerrnel Limited | Professional & scientific | 2024 |
| KEW Centre Ltd | Education | 2021 |
| KEW Learning Ltd | Education | 2018 |
| KEW Solutions International Ltd | Professional & scientific | 2020 |
| Key Kultivation Limited | Arts & recreation | 2019 |
| Keyford Engineering Limited | Manufacturing | 2023 |
| Keystone Commercial Agent Limited | Professional & scientific | 2017 |
| Keystone Evolve Limited | Professional & scientific | 2026 |
| Keystone Homes (Surrey) Ltd | Construction | 2023 |
| Keystone Independent Financial Consultants Ltd | Financial services | 2009 |
| Keystone Wealth Management Limited | Financial services | 2010 |
| Kghgardeningamg Limited | Administrative & support | 2024 |
| KGS International Limited | Education | 2019 |
| Khai Diamonds Ltd | Manufacturing | 2025 |
| Khanna Innovative Solutions Ltd | Other services | 2025 |
| KHC Volleyball Ltd | Arts & recreation | 2026 |
| Khemka (UK) Limited | Professional & scientific | 1989 |
| Khor Medical Ltd | Health & social care | 2014 |
| KI Signature Ltd | Professional & scientific | 2010 |
| Kids With Tumours Ltd | Health & social care | 2015 |
| Kincora Limited | Professional & scientific | 2017 |
| Kinetecho Ltd | Information & communication | 2023 |
| Kinetic Productions Limited | Information & communication | 2005 |
| King Furniture UK Limited | Wholesale & retail | 2021 |
| King George Square (Flats) Limited | Households | 1986 |
| King George Square (Management) Limited | Households | 1986 |
| King George Square (New Flats) Limited | Households | 1987 |
| King Projects (Construction) Limited | Construction | 2018 |
| Kingdom Shine Ltd | Health & social care | 2022 |
| Kingfisher Lodge(Twickenham)Residents Association Limited | Administrative & support | 1967 |
| Kinghams Art Pottery Limited | Wholesale & retail | 2011 |
| Kinghams Auctioneers and Valuers Ltd | Wholesale & retail | 2016 |
| Kingpost Parade Management Company Limited | Households | 1991 |
| Kings Court Management Company Limited | Households | 2018 |
| Kings River Moorings Limited | Real estate | 1979 |
| Kingsbury Court (Woking) Management Company Limited | Real estate | 2021 |
| Kingsday Limited | Professional & scientific | 2021 |
| Kingsley Consulting and Coaching Limited | Professional & scientific | 2021 |
| Kingstech Ltd | Extraterritorial | 2014 |
| Kingston and Sutton Educational Partnership Limited | Education | 2011 |
| Kingston Architects Ltd | Professional & scientific | 2015 |
| Kingston Auto Repaiir Ltd | Other services | 2023 |
| Kingston Barber Club Ltd | Other services | 2022 |
| Kingston Bookkeeping Ltd | Professional & scientific | 2009 |
| Kingston Building Services Ltd | Construction | 2013 |
| Kingston Capital Partners (UK) Ltd | Real estate | 2026 |
| Kingston Churches Action on Homelessness | Hospitality | 1999 |
| Kingston Collectables Limited | Wholesale & retail | 2019 |
| Kingston Consulting Services Limited | Information & communication | 2015 |
| Kingston Educational Trust | Education | 2012 |
| Kingston Escape Rooms Ltd | Arts & recreation | 2019 |
| Kingston First Ltd | Administrative & support | 1999 |
| Kingston Food & Wine Ltd | Wholesale & retail | 2023 |
| Kingston Food Centre Limited | Hospitality | 2022 |
| Kingston Food City Limited | Hospitality | 2025 |
| Kingston Gate Buildings Supervision Limited | Real estate | 1999 |
| Kingston Grammar School | Education | 1999 |
| Kingston Grammar School International Limited | Education | 2019 |
| Kingston Hill Management Company Limited | Households | 2018 |
| Kingston Independent (Freehold) Limited | Households | 2022 |
| Kingston Independent RTM Company Limited | Households | 2022 |
| Kingston JIU Jitsu Ltd | Education | 2018 |
| Kingston Local Ltd | Wholesale & retail | 2025 |
| Kingston London Limited | Hospitality | 2020 |
| Kingston Market Buildings Limited | Real estate | 2023 |
| Kingston Minicabs Cars Limited | Transport & logistics | 2018 |
| Kingston News Limited | Wholesale & retail | 2008 |
| Kingston Painters and Decorators Ltd | Construction | 2025 |
| Kingston Pound CIC | Administrative & support | 2016 |
| Kingston Property Maintenance Limited | Construction | 2019 |
| Kingston Riverside Management Company Limited | Households | 2012 |
| Kingston Rowing Club Ltd | Arts & recreation | 2018 |
| Kingston Software Limited | Information & communication | 2009 |
| Kingston Stoves Ltd | Construction | 2012 |
| Kingston Students' Union | Education | 2025 |
| Kingston Superstore Ltd | Wholesale & retail | 2020 |
| Kingston Tailoring Limited | Manufacturing | 2026 |
| Kingston Tandoori Ltd | Hospitality | 2026 |
| Kingston Tech & Vape Ltd | Wholesale & retail | 2025 |
| Kingston Technology Limited | Construction | 2020 |
| Kingston Thai Massage Ltd | Other services | 2013 |
| Kingston Theatre Trust | Arts & recreation | 1990 |