| KRR Basico Trustee Limited | Financial services | 2022 |
| Krypton Homes Ltd | Real estate | 2024 |
| KS Roofing Services Limited | Construction | 2025 |
| KTB Property Services Limited | Households | 2026 |
| LA FEY Atelier Ltd | Information & communication | 2024 |
| LA Loca Limited | Information & communication | 2011 |
| Laburnum Luxury Living Limited | Construction | 2019 |
| Langafel Close (2012) Limited | Extraterritorial | 2012 |
| Langworth Ltd | Hospitality | 2007 |
| Latif Group Ltd | Real estate | 2025 |
| Laurels Estates Limited | Real estate | 2017 |
| Lautus Property Development Ltd | Real estate | 2025 |
| Lbsa Homes Limited | Real estate | 2021 |
| LCK1 Properties Ltd | Real estate | 2022 |
| LCL Events Limited | Administrative & support | 2015 |
| LDR Transport Ltd | Transport & logistics | 2024 |
| Leather and Steel Ltd | Wholesale & retail | 2022 |
| LEE Metals Holdings Limited | Real estate | 2025 |
| LEE Properties Group Limited | Real estate | 2025 |
| Legs and the City Ltd | Wholesale & retail | 2013 |
| Lignum Construction Ltd | Construction | 2014 |
| Lion Homes Ltd | Administrative & support | 2017 |
| LNH Power Services Ltd | Energy | 2022 |
| Localdirectoryhubs Ltd | Information & communication | 2017 |
| London Sport Academy Limited | Education | 2019 |
| Longcroft Management Ltd | Real estate | 2022 |
| Longfield Automotive Limited | Wholesale & retail | 2013 |
| Longfield DIY Ltd | Wholesale & retail | 2021 |
| Longfield Fish Bar Ltd | Hospitality | 2025 |
| Longfield Hardware Building Services Ltd | Construction | 2019 |
| Longfield Integrated Care Centre Limited | Health & social care | 2002 |
| Longfield Kitchens Limited | Wholesale & retail | 2021 |
| Longfield Nails Ltd | Other services | 2024 |
| Longfield Polyclinic Limited | Wholesale & retail | 2025 |
| Longfield Security Services Ltd | Administrative & support | 2015 |
| Longfield Sheds Ltd | Construction | 2026 |
| Loon Fung Kent Ltd | Hospitality | 2024 |
| Love From Belle Ltd | Wholesale & retail | 2023 |
| LOW Holdings Limited | Financial services | 2022 |
| LS Creative Production Ltd | Arts & recreation | 2021 |
| Lumenux Ltd | Construction | 2025 |
| Luxury Marine Services Limited | Administrative & support | 2026 |
| Luxury Worksurfaces Ltd | Manufacturing | 2025 |
| Lyn's Breakfast Bar Ltd | Hospitality | 2006 |
| M & a Consultants (GB) Limited | Professional & scientific | 2009 |
| M & G Partnership Limited | Administrative & support | 2017 |
| M a Burton Ltd | Health & social care | 2015 |
| M B W Scaffolding Services Limited | Construction | 1997 |
| M D Bithrey Surveyors Ltd | Professional & scientific | 2008 |
| M. Mali Ltd | Health & social care | 2012 |
| MAID2CLEAN Northwest Kent Limited | Administrative & support | 2011 |
| Mana Investments Ltd | Real estate | 2017 |
| Margella Associates Limited | Professional & scientific | 2015 |
| Mark Heeley Property Management Limited | Real estate | 2020 |
| Mark S Vickery Limited | Professional & scientific | 2018 |
| Mark Stanford Consulting Limited | Professional & scientific | 2021 |
| Marsh Services (S.E.) Limited | Water & waste | 2002 |
| Marshall Thomas Electrical Contractors Limited | Construction | 2024 |
| Matthews-Bruce Properties Ltd | Real estate | 2023 |
| Mccoppin Sports Horses Limited | Wholesale & retail | 2021 |
| MD Company Secretary Limited | Extraterritorial | 1998 |
| Medal Property Services Limited | Real estate | 2020 |
| Medpulse Limited | Real estate | 2012 |
| Meei Limited | Hospitality | 2025 |
| Merewell Limited | Real estate | 2023 |
| Mewsly Limited | Real estate | 2021 |
| MID Kent Land & Planning Limited | Construction | 2020 |
| Middlesex County Football League Limited | Arts & recreation | 2004 |
| Millennium Auto Glazing Limited | Wholesale & retail | 2025 |
| Mind the GAP Training Ltd | Education | 2020 |
| Mistvale Limited | Wholesale & retail | 1986 |
| Mitcham Builders Merchants Ltd | Wholesale & retail | 2011 |
| Mo-Jules International Limited | Health & social care | 2015 |
| Montgomery IOS Limited | Real estate | 2023 |
| Montpelier Court Freehold Bromley Limited | Households | 2005 |
| Morgan FM Ltd | Real estate | 2024 |
| Morgan RAE Ltd. | Construction | 2020 |
| Mrjp Investments Limited | Construction | 2014 |
| MSY Grab Hire Limited | Administrative & support | 2018 |
| MSY Lettings Limited | Real estate | 2025 |
| Mullan Development Limited | Construction | 2016 |
| MWR Consultants Ltd | Professional & scientific | 2023 |
| My Rider Line Ltd | Manufacturing | 2025 |
| Myers Maintenance Ltd | Construction | 2019 |
| N P Associates Ltd | Professional & scientific | 2007 |
| NAG Windows Ltd | Construction | 2017 |
| Nail Sanctuary Ltd | Other services | 2023 |
| Nancy's Sandwich Bar (Longfield) Ltd | Hospitality | 2023 |
| NCK Properties Kent Ltd | Real estate | 2021 |
| Nels Spanish Baby Ltd | Wholesale & retail | 2021 |
| Nelson’S Auto Electrics Ltd | Manufacturing | 2021 |
| Nelson’S EYE Consulting Limited | Extraterritorial | 2021 |
| Netclip UK Ltd | Information & communication | 2007 |
| Network Property Management Limited | Real estate | 2004 |
| Nevada Corporation Ltd | Real estate | 2022 |
| Nevada Free Ltd | Real estate | 2024 |
| Neve Engineering Services Limited | Professional & scientific | 1979 |
| New ASH Green Allotments CIC | Agriculture & fishing | 2024 |
| New ASH Green Nutrition Limited | Health & social care | 2025 |
| New ASH Green Sports Pavilion Limited | Arts & recreation | 1982 |