| Lime Design Agency Limited | Professional & scientific | 2016 |
| Lime Design Digital Limited | Professional & scientific | 2022 |
| Lime Design Studio Limited | Administrative & support | 2015 |
| Lindita Limited | Real estate | 2026 |
| Linear Roofline and Property Services Ltd | Construction | 2024 |
| Link Recruitment EDU Group Ltd | Administrative & support | 2024 |
| Liptak Transport Limited | Transport & logistics | 2018 |
| LISHA101 Limited | Wholesale & retail | 2023 |
| Lite Productions Limited | Education | 2017 |
| Little Antlers Ltd | Education | 2025 |
| Little Devil Distillery Ltd | Manufacturing | 2018 |
| Little Pete’S Plumbing Services Ltd | Construction | 2018 |
| Livelife (Eden Hope) Ltd | Financial services | 2019 |
| Living Canvas Limited | Arts & recreation | 2021 |
| Lmp&Cmg Limited | Transport & logistics | 2021 |
| LMS Celebrity Autographs Ltd | Wholesale & retail | 2026 |
| LMW Investments (Northamptonshire) Limited | Financial services | 2022 |
| Lnguyen Properties Ltd | Real estate | 2026 |
| Loca Beverages Ltd | Manufacturing | 2013 |
| Logans Solutions Ltd | Information & communication | 2018 |
| Lolo Trans Ltd | Transport & logistics | 2023 |
| Look Who's Dancing NOW CIC | Other services | 2025 |
| Loosey Goosey Grill Limited | Hospitality | 2024 |
| Lorenzo's Window Cleaning Limited | Administrative & support | 2025 |
| Lottique Consulting Ltd | Professional & scientific | 2026 |
| Lotus Glow Beauty Limited | Other services | 2023 |
| Lotusckt Limited | Construction | 2023 |
| Love Cabling Ltd | Information & communication | 2014 |
| LRS Park Home Services Ltd | Construction | 2018 |
| Lscd Security Ltd | Administrative & support | 2019 |
| LTG Property Limited | Real estate | 2025 |
| Lucas & Albion Limited | Wholesale & retail | 2014 |
| Lucensia Consulting Ltd | Information & communication | 2025 |
| Lukata Ltd | Wholesale & retail | 2019 |
| Lustrelash Ltd | Wholesale & retail | 2020 |
| Lutterworth Utility Solution Limited | Professional & scientific | 2014 |
| LUX Automated Trading Systems Ltd | Information & communication | 2021 |
| LX Avionics Limited | Wholesale & retail | 2002 |
| LYA Trans Ltd | Transport & logistics | 2019 |
| M & G Vincent Pest Control Ltd | Administrative & support | 2019 |
| M & P Home for YOU Ltd | Construction | 2023 |
| M & Q Special Projects Limited | Mining & quarrying | 2017 |
| M J Building Ltd | Construction | 1998 |
| M K Dunkley Builders & Sons Ltd | Construction | 2025 |
| M&C Invest Ltd | Real estate | 2022 |
| M&J Autosales Ltd | Wholesale & retail | 2024 |
| M&J Heating Ltd | Construction | 2020 |
| M&M Import Ltd | Wholesale & retail | 2009 |
| M&P Trans Ltd | Transport & logistics | 2019 |
| M&T Brickwork Ltd | Construction | 2019 |
| M&Z Homes Ltd | Real estate | 2026 |
| M-Flex Technology Limited | Information & communication | 2010 |
| M. Bliss (Subcontract Brickwork) Limited | Construction | 1981 |
| M.L. Howe Fencing Limited | Construction | 2018 |
| M4EM Ltd | Manufacturing | 2026 |
| Machine Guard Solutions Limited | Manufacturing | 2008 |
| Machinetool Direct Ltd | Extraterritorial | 2007 |
| MAD Style Ltd | Wholesale & retail | 2017 |
| MAESTRO500 Limited | Transport & logistics | 2020 |
| Magna Green Ltd | Arts & recreation | 2024 |
| Maile Transport Ltd | Transport & logistics | 2024 |
| Majestic Developments (Plumbing & Heating) Limited | Construction | 2005 |
| Makathran Consulting Ltd | Professional & scientific | 2026 |
| Malatopia Services Ltd | Other services | 2018 |
| Mamhla Ltd | Health & social care | 2022 |
| Man&Mon Transport Ltd | Transport & logistics | 2017 |
| Manageconnect Ltd | Professional & scientific | 2020 |
| Mandy Evans Design Limited | Professional & scientific | 2018 |
| Manko Developments Limited | Construction | 2021 |
| Manton Maintenance Limited | Households | 2014 |
| Marcin Kufel Ltd | Wholesale & retail | 2024 |
| Marcinez Ltd | Transport & logistics | 2023 |
| Mardyce Care Limited | Health & social care | 2014 |
| Mardyce Cleaning Limited | Administrative & support | 2021 |
| Marek Rotter Limited | Transport & logistics | 2017 |
| Maria Delicatessen Limited | Wholesale & retail | 2007 |
| Mario & SON Smartfix Ltd | Wholesale & retail | 2025 |
| Mark AW Ltd | Transport & logistics | 2019 |
| Mark Loveridge Limited | Construction | 2025 |
| Marks Electronics Limited | Construction | 2023 |
| Martin Andrews Consulting Ltd | Professional & scientific | 2018 |
| Mary Adam International Ltd | Extraterritorial | 2000 |
| Master & Sons Ltd | Manufacturing | 2024 |
| Matt Poulter Plumbing & Heating Ltd | Construction | 2025 |
| Matthew James Automotive Ltd | Wholesale & retail | 2024 |
| Matthew James Property Developments Ltd | Real estate | 2025 |
| Matts Lettings Ltd | Real estate | 2023 |
| Maulden Multi Trade Limited | Construction | 2025 |
| Maximus Haulage Limited | Transport & logistics | 2015 |
| MAY & Fair Co Ltd | Real estate | 2024 |
| MAZ Marketing Ltd | Wholesale & retail | 2025 |
| MBW Engineering Services Limited | Professional & scientific | 2024 |
| MC Logistic Trans Ltd | Transport & logistics | 2017 |
| MC Motors & Services Ltd | Wholesale & retail | 2025 |
| Mcag Retail Consultancy Ltd | Professional & scientific | 2013 |
| Mcdonald Estates Ltd | Real estate | 2020 |
| Mcfarlane Engineering Ltd | Professional & scientific | 2018 |
| Mclean Trading Ltd | Construction | 2011 |
| Mcmillan Engineering Services Ltd | Professional & scientific | 2023 |
| Mcsmith Ltd | Real estate | 2017 |