| Kings Church Tandridge | Other services | 2006 |
| Kingsmead Physiotherapy Clinic Limited | Health & social care | 2002 |
| Kirk Recruitment Ltd | Information & communication | 2018 |
| KIT Funder Limited | Information & communication | 2026 |
| Kite Development Services Ltd | Construction | 2026 |
| Kiyo Automation Ltd | Manufacturing | 2025 |
| Kiyo Design Ltd | Manufacturing | 2007 |
| Kiyo Group Ltd | Financial services | 2025 |
| Kiyo Mechanical Ltd | Manufacturing | 2025 |
| KLM Structural Engineering Limited | Professional & scientific | 2024 |
| Knight Education Limited | Administrative & support | 2025 |
| Knightsbridge Building Services Limited | Construction | 2005 |
| Knightsbridge Property Services Group Limited | Construction | 2006 |
| Knowles Stained Glassworks Limited | Manufacturing | 2012 |
| Kourdi Associates Ltd | Information & communication | 2020 |
| KS Groundworks Ltd | Construction | 2025 |
| Kuwa Trading Ltd | Manufacturing | 2019 |
| Kwon (UK) Limited | Wholesale & retail | 1989 |
| L & E Property Investments Limited | Real estate | 2020 |
| L.F. Dove Limited | Real estate | 1954 |
| L.J Contracts Limited | Real estate | 2021 |
| Labels & Labelling Data and Consultancy Services Limited | Administrative & support | 1982 |
| Landl Ltd | Construction | 2013 |
| Latitude Agency Limited | Manufacturing | 1997 |
| Latitude Media Ltd | Information & communication | 2018 |
| Latitudes Marketing Company Limited | Wholesale & retail | 2007 |
| Lattitude Safety Limited | Professional & scientific | 2004 |
| Launch IT Recruitment Ltd | Administrative & support | 2013 |
| Laurux Fitness Limited | Other services | 2020 |
| Lawsimple Limited | Professional & scientific | 2022 |
| LE Stays Ltd | Real estate | 2023 |
| Lead Property Limited | Real estate | 2013 |
| Leda Consultancy Limited | Administrative & support | 2023 |
| Legacy Heating and Plumbing Limited | Construction | 2021 |
| Leonce Blanc Limited | Hospitality | 2024 |
| Lewis Mcdonagh Ltd | Construction | 2013 |
| Lifefit Oxted Limited | Arts & recreation | 2022 |
| Lifeline Fitness Limited | Arts & recreation | 2011 |
| Lighting Hire Limited | Extraterritorial | 2014 |
| Limpsfield Community Orchard Community Interest Company | Administrative & support | 2011 |
| Limpsfield Freehold Limited | Real estate | 2017 |
| Line Estate Planning & Wills Ltd | Information & communication | 2026 |
| Line Financial Services Limited | Professional & scientific | 2020 |
| Linger Longer Films Ltd | Information & communication | 2025 |
| Links Wealth Management Limited | Professional & scientific | 2024 |
| Lion Risk Strategic Partners Limited | Professional & scientific | 2022 |
| Little Court Farm Residents Company Limited | Real estate | 2000 |
| Lloyd & Co. Ca's Limited | Professional & scientific | 2009 |
| Lm-Xp Media, Ltd | Information & communication | 2016 |
| Local Box Office Limited | Real estate | 2009 |
| Locksbottom Health Kitchen Ltd | Hospitality | 2023 |
| Logic Workspace Holdings Ltd | Financial services | 2022 |
| Logic Workspace Limited | Construction | 2019 |
| Logical Results LLP | | 2019 |
| London Gymnastics Ltd | Arts & recreation | 2018 |
| Lorelei London Limited | Manufacturing | 2010 |
| Lounge Productions Limited | Arts & recreation | 2000 |
| Love LŸF Ltd | Health & social care | 2021 |
| Love Property Corp Ltd | Real estate | 2023 |
| Lovebirds Landing Limited | Real estate | 2020 |
| Luggage on Line Limited | Wholesale & retail | 2004 |
| Luke’S Garden Care Ltd | Administrative & support | 2025 |
| Lumaview Ltd | Construction | 2024 |
| Lyndon Copiers Limited | Administrative & support | 1985 |
| Lyndon Holdings Limited | Professional & scientific | 2003 |
| Lyndon Leasing Limited | Administrative & support | 1997 |
| Lyndon Property Investments Limited | Real estate | 2003 |
| Lyndon Publishing Limited | Information & communication | 2017 |
| Lyndon PUBLISHING2 Ltd | Information & communication | 2022 |
| Lynton House (Oxted) Management Company Limited | Other services | 2005 |
| Lynton House Residents Company Limited | Real estate | 2012 |
| Lysias Property Management Limited | Real estate | 1994 |
| M B Gunn & Co Ltd | Professional & scientific | 2003 |
| M C Will Writing Services Limited | Administrative & support | 2020 |
| M J S Associates Limited | Professional & scientific | 2005 |
| M&G Business Ltd | Wholesale & retail | 2018 |
| M&T Capital Realty Ltd | Real estate | 2025 |
| M.P. Gallagher Construction Limited | Construction | 1991 |
| M.S. Venison Ltd | Wholesale & retail | 2025 |
| M.W. Norman Limited | Construction | 1983 |
| MAD Labs VFX Limited | Professional & scientific | 2023 |
| Madgwick Capital Limited | Professional & scientific | 2022 |
| Maids of Perfection Ltd | Administrative & support | 2019 |
| Maison Property Group Limited | Real estate | 2015 |
| Maja Investments Limited | Construction | 2000 |
| Mako Solutions Ltd | Administrative & support | 2023 |
| MAM Residential Properties Limited | Real estate | 2020 |
| Mangle Menders Limited | Manufacturing | 2003 |
| Manuka Shoes Limited | Wholesale & retail | 2007 |
| Mapua Solutions Ltd | Information & communication | 2024 |
| MARA74 Limited | Transport & logistics | 2021 |
| March Design Limited | Administrative & support | 2008 |
| Marion Road EYE Clinic UK Ltd | Financial services | 2022 |
| Master Close Freeholders Limited | Households | 2001 |
| Master Park Pavilion Charity | Health & social care | 2016 |
| Mastered Consultants Limited | Real estate | 2003 |
| Masters of Industry Limited | Administrative & support | 2020 |
| Match Point Tennis (UK) Limited | Arts & recreation | 2009 |
| Matic Engineering Limited | Construction | 2022 |
| Matrix Health Advisers Ltd | Professional & scientific | 2023 |