| Kathryn Mcmann Consultancy Ltd | Professional & scientific | 2012 |
| KAY W Limited | Professional & scientific | 2010 |
| Kaya RG Ltd | Hospitality | 2025 |
| Kazi Kebab Limited | Hospitality | 2025 |
| KB & Co. Enterprise Limited | Real estate | 2019 |
| Kelal Construction Limited | Construction | 2007 |
| Kelly Scaffolding Access Solutions Ltd | Construction | 2008 |
| Kennett Limited | Arts & recreation | 2015 |
| Kensington Parkgate Holdings Limited | Real estate | 2022 |
| Kernel Events Limited | Administrative & support | 2019 |
| Key Investment Partners Ltd | Professional & scientific | 2025 |
| Keystone Holdco Limited | Financial services | 2011 |
| Keystone Legal Benefits Limited | Financial services | 1988 |
| KIN Investments Limited | Financial services | 2014 |
| KIN KAN DO - RH Ltd | Administrative & support | 2019 |
| KIN KAN DO Limited | Administrative & support | 2008 |
| Kingfisher East Ltd | Hospitality | 2019 |
| Kingfisher Foods Limited | Wholesale & retail | 1979 |
| Kingsbury Lettings Limited | Real estate | 2003 |
| Kingscote Enterprises Limited | Professional & scientific | 2014 |
| Kingscote Holdings Limited | Financial services | 2020 |
| Kingsdown Construction & Design Ltd | Construction | 2018 |
| Kingsgate Partners Ltd | Other services | 2016 |
| Kingston Road RTM Company Limited | Real estate | 2015 |
| Kingston Student Villa Ltd | Construction | 2012 |
| Kitchen Communications Limited | Professional & scientific | 2006 |
| KJD Horsebox Hire Reigate Limited | Transport & logistics | 2025 |
| KJH Records Ltd | Manufacturing | 2026 |
| KKL Environments Limited | Real estate | 2016 |
| Kksk Limited | Real estate | 2018 |
| Klein Insurance Management Ltd. | Administrative & support | 1999 |
| KLK Properties Limited | Construction | 2015 |
| KLP Business Consulting Limited | Professional & scientific | 2004 |
| KLP Medical Supplies Ltd | Health & social care | 2022 |
| KM Consultancy Limited | Professional & scientific | 1995 |
| KMH Style Ltd | Professional & scientific | 2019 |
| KMP Consulting Limited | Professional & scientific | 2007 |
| KN1 Ltd | Construction | 2019 |
| KN1 Property Ltd | Real estate | 2022 |
| Knight Property & Investments Limited | Real estate | 2004 |
| Knightford Homes Limited | Construction | 2007 |
| Knights Property (South East) Limited | Real estate | 2010 |
| KNK Ent&Fps Limited | Other services | 2018 |
| KNL Broadcast Limited | Information & communication | 2019 |
| Knox Natural Resources Ltd | Water & waste | 2026 |
| Knox Services Limited | Construction | 2022 |
| Kokoro Reigate Ltd | Hospitality | 2023 |
| Kowloon Land Ltd | Construction | 2021 |
| KPT Group Vacations Ltd | Administrative & support | 2015 |
| KRS Property Ltd | Real estate | 2020 |
| KS3D Ltd | Manufacturing | 2023 |
| KSM Auto Clinic Ltd | Wholesale & retail | 2017 |
| KSQ Projects Limited | Professional & scientific | 2015 |
| KT Home RENOV8 Ltd | Construction | 2020 |
| KTK Gates Limited | Financial services | 2022 |
| Kulaana Consulting Ltd | Health & social care | 2021 |
| KURD1 Limited | Other services | 2023 |
| Kutchenhaus Reigate Ltd | Wholesale & retail | 2024 |
| L C J Projects Limited | Construction | 2013 |
| L J Plastering South East Ltd | Construction | 2015 |
| L&B Legacy Limited | Real estate | 2024 |
| L&C Installations Limited | Professional & scientific | 2010 |
| L&L Building and Maintenance Ltd | Construction | 2019 |
| L.M.Stern Limited | Professional & scientific | 2017 |
| L.T.Clean Limited | Administrative & support | 2024 |
| LA Cuts Limited | Manufacturing | 2017 |
| LA Neurology Limited | Health & social care | 2005 |
| LA Parranda Limited | Hospitality | 2024 |
| LA Parranda Restaurant and Bar Ltd | Hospitality | 2024 |
| LA Source International Limited | Hospitality | 2022 |
| Laborat Limited | Administrative & support | 2018 |
| LAI CHA Ltd | Hospitality | 2020 |
| Lakemead Estates Limited | Construction | 2020 |
| Lakotah Ltd | Professional & scientific | 2007 |
| Lancaster Gate Consultancy Limited | Professional & scientific | 2012 |
| Landauer Aviation Consulting Limited | Professional & scientific | 2015 |
| Landline (Sevenoaks) Limited | Professional & scientific | 2000 |
| Landsdown Property Limited | Real estate | 2015 |
| Lanello Ltd | Information & communication | 2025 |
| Langdon Proprietors Limited | Real estate | 2023 |
| Language Serves YOU Ltd | Education | 2010 |
| Lara Paul Limited | Financial services | 2025 |
| Laura Turney Ltd | Professional & scientific | 2018 |
| Lavince Properties Limited | Real estate | 2023 |
| Law Plan Services Limited | Professional & scientific | 2016 |
| Lawn and Order Landscaping Ltd | Administrative & support | 2019 |
| LB Advantage Ltd | Professional & scientific | 2026 |
| LCJ Properties Limited | Real estate | 2022 |
| LDI Decorating Limited | Construction | 2016 |
| LDM Accounting Services Limited | Professional & scientific | 2025 |
| LE Competitions Ltd | Wholesale & retail | 2026 |
| Leaf Marketing Communications Limited | Professional & scientific | 2016 |
| Leafgreen Developments Ltd | Real estate | 2021 |
| Ledbury Road Residents Association Limited | Professional & scientific | 1992 |
| LEE & MO (Devon) Ltd | Hospitality | 2022 |
| LEE House Camborne Ltd | Hospitality | 2025 |
| LEE Simmons Limited | Hospitality | 2004 |
| LEE Sisters Ltd | Hospitality | 2015 |
| Legg Fundraising Consultancy Ltd | Professional & scientific | 2026 |
| Leggett Oakmont Ltd | Real estate | 2024 |