| Lokma Kitchen Ltd | Hospitality | 2019 |
| London Revue Company Ltd | Arts & recreation | 2013 |
| London Stitch and Print Limited | Administrative & support | 2010 |
| Londonaframes (Stratford) Ltd | Wholesale & retail | 2024 |
| Long Marston Aerodrome Limited | Other services | 1993 |
| Long Marston Little Theatre Community Interest Company | Arts & recreation | 2023 |
| Lonsdale Computer Services Limited | Information & communication | 1995 |
| Loom Holdings Limited | Financial services | 2022 |
| Loom Systems Limited | Information & communication | 2022 |
| Loop Voice & Data Limited | Extraterritorial | 2009 |
| Loren Consulting Limited | Professional & scientific | 2019 |
| Loughmount Services Ltd | Construction | 2024 |
| Louise Victoria Couture Bridal Ltd | Wholesale & retail | 2018 |
| Love Kiki Designs Limited | Manufacturing | 2023 |
| Lovely Nails Limited | Other services | 2015 |
| Loveridge Kitchens & Bathrooms Limited | Other services | 2009 |
| Loveurhouse Limited | Administrative & support | 2009 |
| Lovin Being Ltd | Wholesale & retail | 2017 |
| Lowe Software Limited | Information & communication | 2024 |
| Lower Clopton Farm Shop Limited | Wholesale & retail | 2019 |
| Lower Quinton Garages Limited | Wholesale & retail | 1954 |
| Loxley Advisory Services Ltd | Professional & scientific | 2023 |
| Loxley Development Management Ltd | Construction | 2014 |
| Loxley Heights (Stratford) Management Company Limited | Households | 2007 |
| LP Property Group Ltd | Real estate | 2023 |
| Lpembroidery Ltd | Wholesale & retail | 2026 |
| LQG Agri Limited | Wholesale & retail | 2016 |
| LS Legal Ltd | Professional & scientific | 2024 |
| LSK Solutions Ltd | Construction | 2022 |
| Luca and Rosa Limited | Wholesale & retail | 2020 |
| Luca Loves Pizza Ltd | Wholesale & retail | 2019 |
| Lucehann Limited | Real estate | 2018 |
| Lucharue Limited | Financial services | 2022 |
| Lucid Property Ltd | Professional & scientific | 2016 |
| Luddridge Developments Limited | Real estate | 2018 |
| Luddridge Properties One Limited | Real estate | 2020 |
| Luddridge Properties Two Limited | Real estate | 2020 |
| Ludford Communications Ltd | Professional & scientific | 2023 |
| Ludo Consulting Limited | Real estate | 2024 |
| Luna Property Management Ltd | Real estate | 2020 |
| Lusoinveste Limited | Administrative & support | 2021 |
| Luther Analytics Limited | Information & communication | 2025 |
| Luxesound Ltd | Information & communication | 2025 |
| Luxevue Stays Ltd | Hospitality | 2025 |
| M & P Building Services Limited | Construction | 2008 |
| M a Clarke Electrical Contractors Limited | Construction | 2002 |
| M F Management Investment Ltd | Professional & scientific | 2017 |
| M J Plews Associates Limited | Administrative & support | 2012 |
| M Perkins Limited | Transport & logistics | 2016 |
| M Wilkinson Consulting Ltd | Administrative & support | 2024 |
| M&A Property Refurb Ltd | Real estate | 2022 |
| M&P Ltd | Manufacturing | 2024 |
| M. H. Propco Limited | Real estate | 1986 |
| MAC Simple Stratford Ltd | Other services | 2023 |
| MAC Wealth Management Limited | Financial services | 2023 |
| Macro Holdings Limited | Professional & scientific | 2021 |
| Macro Media Group Ltd | Professional & scientific | 2025 |
| MAD Wrapz Limited | Manufacturing | 2025 |
| Maelou Developments Limited | Real estate | 2013 |
| Magarchives Limited | Professional & scientific | 2025 |
| Magenta MO Ltd | Wholesale & retail | 2023 |
| Magenta Press Tooling Design Ltd | Professional & scientific | 2018 |
| Magnete Ltd | Administrative & support | 2019 |
| Magnum 1965 Holdings Limited | Real estate | 2022 |
| Maher Brownsword Limited | Financial services | 2002 |
| Make Creative Ltd | Professional & scientific | 2023 |
| Mamimin Properties Limited | Real estate | 2020 |
| Mammas That Network Ltd | Professional & scientific | 2025 |
| Manage Media Ltd | Professional & scientific | 2025 |
| Mango Lover House Limited | Other services | 2012 |
| Manjake Limited | Administrative & support | 1997 |
| Manju Haven Ltd | Real estate | 2024 |
| Manor Court (Ettington) Management Company Limited | Households | 1989 |
| Manor Farm Poultry Limited | Agriculture & fishing | 2018 |
| Manor Road Homes Ltd | Construction | 2024 |
| Mansal Securities Limited | Real estate | 1978 |
| Manufacturing Software UK Limited | Information & communication | 2016 |
| Mapa Property Limited | Real estate | 2024 |
| Maple & Bumble Ltd | Manufacturing | 2025 |
| Maple Computing Ltd | Information & communication | 2003 |
| Maragav Properties Limited | Real estate | 2023 |
| Marble Eight Limited | Professional & scientific | 2002 |
| Marcel Gabriel Transport Limited | Transport & logistics | 2022 |
| Marchfont Limited | Agriculture & fishing | 2017 |
| Marcus Johnson Limited | Professional & scientific | 2013 |
| Marden Limited | Real estate | 1995 |
| Marine and Hazardous Engines Limited | Manufacturing | 2020 |
| Mariusz Auto Ltd | Wholesale & retail | 2025 |
| Mariusz Muszynski Limited | Wholesale & retail | 2016 |
| Mark Robins Contracting Limited | Construction | 2002 |
| Marketing Standard Limited | Professional & scientific | 2004 |
| Marketing WE ARE Digital Ltd | Professional & scientific | 2026 |
| Marketingmates Ltd | Hospitality | 2022 |
| Marketrules 2 Ltd | Administrative & support | 2016 |
| Marlowes Stratford Limited | Real estate | 2016 |
| Marraway Timber Buildings Limited | Manufacturing | 2024 |
| Marston Edge Ltd | Construction | 2018 |
| Marston RPA Ltd | Information & communication | 2021 |
| Martyn Pass Public Relations Limited | Professional & scientific | 2014 |
| Mary Christophi Holdings Limited | Real estate | 2023 |