| Kevin Edward Developments Limited | Real estate | 2015 |
| Kieran Chalker Investments Limited | Real estate | 2010 |
| Kieran Chalker Productions Ltd | Information & communication | 2023 |
| Klassy Luxe Limited | Other services | 2021 |
| KMT Electrical & Fire Installations Ltd | Construction | 2025 |
| L-Squared Property & Maintenance Ltd | Construction | 2025 |
| Lancashire Insulation Services Limited | Construction | 2019 |
| Langley Care Services Limited | Health & social care | 2024 |
| Lark & Lane Management Limited | Other services | 2026 |
| Laurel RTM Company Limited | Households | 2007 |
| Leaves Green Hand Car Wash Ltd | Administrative & support | 2026 |
| Lees Electrical (London) Ltd | Construction | 2023 |
| Left Handed Investment Ltd | Financial services | 2021 |
| Lemon Beauty Tech Ltd | Other services | 2023 |
| Lignum Opus Ltd | Construction | 2016 |
| LIM Investment Limited | Real estate | 2016 |
| LNJ Electrics Limited | Construction | 2021 |
| Locate to Create Ltd | Administrative & support | 2022 |
| Lomax Refurbishments Ltd | Construction | 2025 |
| London Wallcoverings Ltd | Manufacturing | 2019 |
| Lone Oak Productions Limited | Information & communication | 2012 |
| Love Locals Group Ltd | Information & communication | 2025 |
| Loveleigh Ltd | Wholesale & retail | 2023 |
| LS Daycare and Preschools Limited | Health & social care | 2026 |
| Luminite Group Ltd | Real estate | 2018 |
| Luminite Property Investments Ltd | Real estate | 2020 |
| LWB Digital Ltd | Information & communication | 2022 |
| M&A Trades Limited | Manufacturing | 2024 |
| M&L Strategic Consulting Ltd | Professional & scientific | 2025 |
| MAD About Mutts Limited | Other services | 2019 |
| Malcolm Charles Conservation Limited | Construction | 2023 |
| Maltby Coaching Ltd | Professional & scientific | 2026 |
| Market JAR Limited | Professional & scientific | 2018 |
| Material Instance Ltd. | Manufacturing | 2019 |
| Maxela Properties Limited | Real estate | 2020 |
| Mayhew Spas Ltd | Other services | 2018 |
| MBP Investment Ltd | Real estate | 2021 |
| MC Strategic Consult Ltd | Other services | 2022 |
| MD Beauty Visage Ltd | Health & social care | 2026 |
| MDP Global Ltd | Administrative & support | 2024 |
| MEC Projects and Consultancy Ltd | Education | 2018 |
| Medgrad Limited | Education | 2012 |
| Melanie O’Rourke Skincare & Make UP Limited | Other services | 2021 |
| Merebrook Partners Limited | Financial services | 2025 |
| Mi-Amii Limited | Wholesale & retail | 2023 |
| Michael Cloonan TPC Limited | Education | 2020 |
| Michael Fairman Design Ltd | Professional & scientific | 2023 |
| Michaela Garton Limited | Real estate | 2010 |
| Midnight Integrated Systems Limited | Administrative & support | 1987 |
| Millbeck Advisory Ltd | Other services | 2024 |
| Mindfix Ltd | Education | 2022 |
| MJB Plastering Limited | Construction | 2014 |
| MML Resourcing Global Limited | Information & communication | 2021 |
| Modistore-Lighting Ltd | Wholesale & retail | 2023 |
| Modusbarn Limited | Other services | 1980 |
| Mollymoo Caterers Limited | Hospitality | 2022 |
| Moments Event Hire Ltd | Hospitality | 2024 |
| Moosh Limited | Wholesale & retail | 2013 |
| MPB GAS Services Ltd | Construction | 2022 |
| MT Lashes & Beauty Ltd | Administrative & support | 2023 |
| Mulholland Scaffolding Ltd | Construction | 2024 |
| Music MIX Marketing Limited | Professional & scientific | 2014 |
| Mutleys Crew Ltd | Professional & scientific | 2025 |
| My Night Under the Stars Ltd | Health & social care | 2020 |
| My Office Clearance Ltd | Construction | 2020 |
| My Physio Croydon Ltd | Administrative & support | 2012 |
| Myers Group Limited | Transport & logistics | 1983 |
| Myers Group Properties Ltd | Hospitality | 2021 |
| Myers Transport Limited | Transport & logistics | 1980 |
| MYS Electrical Limited | Energy | 2019 |
| N & G Bartlett Investments Limited | Real estate | 2021 |
| Nantissa Investments Ltd | Real estate | 2002 |
| Natural Symmetry Ltd | Other services | 2013 |
| New Forest Motor Company Limited | Wholesale & retail | 2024 |
| Newbridge Foreign Exchange Limited | Administrative & support | 2018 |
| Newbridge Property Limited | Real estate | 2017 |
| Niche Equestrian Wear Limited | Wholesale & retail | 2023 |
| Nickychanot Ltd | Other services | 2024 |
| NOG London Limited | Construction | 2021 |
| Noisy Pitch Ltd | Hospitality | 2024 |
| North & South Leisure Holdings Ltd | Hospitality | 2017 |
| North & South Leisure Ltd | Hospitality | 2017 |
| NRG Contracts Limited | Wholesale & retail | 2019 |
| NRG PAY Limited | Professional & scientific | 2019 |
| Old Barn Recording Limited | Information & communication | 1989 |
| Osprey Travel Ltd. | Transport & logistics | 2002 |
| OTT Hair Design Ltd | Other services | 2014 |
| Outflow Limited | Other services | 2022 |
| Pangea Estates Ltd | Real estate | 2022 |
| Parisaye Limited | Financial services | 2016 |
| Parklife (LSP) Limited | Hospitality | 2021 |
| PAT Gavin Limited | Real estate | 2023 |
| Pattisons & Palomino Ltd | Wholesale & retail | 2025 |
| Pauline Ashton Decorators Ltd | Construction | 2024 |
| PAW Creatives Ltd | Other services | 2019 |
| Paxhill Park Limited | Arts & recreation | 1988 |
| Peter Varney Associates Ltd | Professional & scientific | 2011 |
| PIE PIE Limited | Wholesale & retail | 2013 |
| Pinewood Landscapes and Maintenance Ltd | Administrative & support | 2023 |
| Plasterite Mouldings Limited | Construction | 2020 |