| KV Communications Limited | Professional & scientific | 2011 |
| Kygo Limited | Administrative & support | 2007 |
| Langford Capital Limited | Real estate | 2014 |
| LAP Media Limited | Professional & scientific | 2022 |
| Lauchlan Holdings Limited | Professional & scientific | 2010 |
| Leadership Trail Limited | Other services | 2013 |
| Leedstone Limited | Administrative & support | 1997 |
| Legacy Financial Solutions Limited | Financial services | 2010 |
| Legacy Wills UK Limited | Arts & recreation | 2006 |
| Lexus Investments Ltd | Other services | 2014 |
| Limebok Landscaping Limited | Administrative & support | 2017 |
| Lion Trading Consultants Limited | Professional & scientific | 2015 |
| LIV Diamonds Limited | Wholesale & retail | 2015 |
| Liveshot UK Limited | Professional & scientific | 2016 |
| LKA Cleaning Ltd | Administrative & support | 2023 |
| London Real Estate Services Ltd | Real estate | 2025 |
| Lorena Dolan Chandler Limited | Extraterritorial | 2022 |
| Lucas Partners Limited | Extraterritorial | 2006 |
| Lynk International Ltd | Transport & logistics | 2020 |
| M and L Foster (Boats) Limited | Transport & logistics | 1972 |
| Machine Two Ltd | Information & communication | 2008 |
| Magnolia Holdings Ltd | Hospitality | 2025 |
| Mark Render Limited | Professional & scientific | 2003 |
| Marsan Investments Ltd | Administrative & support | 2013 |
| Mean Broadcast Limited | Professional & scientific | 2008 |
| Meat RAM Square Limited | Hospitality | 2023 |
| MEDIAINCUBE8 Limited | Professional & scientific | 2018 |
| Merchandise Ltd. | Administrative & support | 2007 |
| Merrett Carriers Limited | Transport & logistics | 2007 |
| Mertonberry Limited | Financial services | 1981 |
| Metropole Construction Limited | Real estate | 1999 |
| MGC (GB) Limited | Professional & scientific | 2009 |
| MHO Medico-Legal Limited | Professional & scientific | 2019 |
| Midas Events Group Limited | Administrative & support | 2020 |
| Middle Kingdom UK (Holdings) Limited | Professional & scientific | 2017 |
| Mighty Punch Studios UK Limited | Information & communication | 2022 |
| Mindful Herts CIC | Administrative & support | 2017 |
| Minesat Ltd | Information & communication | 2021 |
| Minimum Impedance Limited | Information & communication | 2010 |
| Minster Medical Services Ltd | Hospitality | 2002 |
| Mitraq Ltd | Administrative & support | 2015 |
| MJ Event Consultants Limited | Administrative & support | 2019 |
| Moda Management Limited | Professional & scientific | 2019 |
| Moola Limited | Professional & scientific | 2011 |
| Mount View Property Investments Ltd | Real estate | 2023 |
| Nasco Enterprises Limited | Construction | 2014 |
| Nass Property Ltd | Construction | 2019 |
| NEE NEE Creative Limited | Professional & scientific | 2016 |
| Nemontial Limited | Administrative & support | 2013 |
| New Orchard Homes Limited | Real estate | 2023 |
| Newco (HSW1) Limited | Professional & scientific | 1997 |
| Newman Strategic Ltd | Other services | 2020 |
| Nicholson Clinical Services Ltd | Health & social care | 2023 |
| NIM Associates Limited | Information & communication | 1994 |
| Nine Notes Media International Limited | Information & communication | 2011 |
| Notting Hill Industries Limited | Real estate | 2019 |
| Novasteer Digital Ltd | Information & communication | 2024 |
| Offspring Family Limited | Real estate | 2021 |
| Olmex Limited | Real estate | 2005 |
| Oncogenomix Limited | Health & social care | 2020 |
| One Eight Three Four Limited | Administrative & support | 2005 |
| Optimus Associates Management Limited | Financial services | 2021 |
| Orange Grove Consultancy UK Limited | Professional & scientific | 2016 |
| Organic Land UK Company Limited | Wholesale & retail | 2024 |
| Original Clone Limited | Extraterritorial | 2014 |
| Pandovita Limited | Information & communication | 2017 |
| Papa's GOT a New Brand Limited | Extraterritorial | 2012 |
| Paramaxe Ltd | Professional & scientific | 2022 |
| Park Place Investments Ltd | Real estate | 2017 |
| Parkside (Hindes Road, Harrow) Management Company Limited | Households | 2003 |
| Parkside Management Limited | Households | 1996 |
| PBW Investments Limited | Financial services | 2007 |
| PEA EL Sea Limited | Real estate | 1999 |
| Peach&Cream Ltd | Extraterritorial | 2018 |
| Pelle Perfetta Limited | Education | 2020 |
| Pensarn (2020) Limited | Real estate | 2020 |
| Peter Gourri Limited | Other services | 2018 |
| Pinadale Limited | Households | 1994 |
| PJ Buy Limited | Administrative & support | 2014 |
| Planning & Development Associates Ltd | Professional & scientific | 2011 |
| Playwbricks Limited | Wholesale & retail | 2022 |
| Poggio Della Madonna Limited | Real estate | 2012 |
| Poshldn Ltd | Hospitality | 2025 |
| Powerhousehh Ltd | Households | 2024 |
| Pradd Tours Ltd | Hospitality | 2024 |
| Precision Optical Ltd | Manufacturing | 1994 |
| Premier Clean London Ltd | Construction | 2018 |
| Premier London Investments Ltd | Real estate | 2015 |
| Primebrook Development Limited | Construction | 2009 |
| Private Culture Limited | Manufacturing | 2017 |
| Property Renovation & Maintenance Limited | Construction | 2005 |
| Psychological Retreat Limited | Hospitality | 2020 |
| Purely Turmeric Limited | Manufacturing | 2020 |
| Purple Amethyst Limited | Other services | 2025 |
| R Morrison Psychology Ltd | Other services | 2022 |
| R&G Investments and Holdings Ltd | Other services | 2023 |
| Rail Lodge Management Limited | Households | 2014 |
| Red Media Plus Limited | Professional & scientific | 2024 |
| Red Media Sales UK London Limited | Professional & scientific | 2015 |
| Refugio Management Services Ltd | Real estate | 2016 |