| Livewire Performance Consultants Limited | Administrative & support | 2008 |
| LMP Capital Ltd | Information & communication | 2025 |
| Lmp-Systems Ltd | Information & communication | 2020 |
| Locksmith Rescue Limited | Construction | 2015 |
| Logan Enchantress Limited | Professional & scientific | 2024 |
| Logarik Limited | Construction | 2018 |
| Lole Fitness Ltd | Arts & recreation | 2026 |
| London and Lancashire Watch Company Ltd | Extraterritorial | 2022 |
| London Films Productions Limited | Information & communication | 2023 |
| Love in a Frame Limited | Wholesale & retail | 2018 |
| Love to Cater Ltd | Hospitality | 2020 |
| LP SD Sixty Three Limited | Wholesale & retail | 2023 |
| LS Car Sales Limited | Wholesale & retail | 2017 |
| Luar Catering Limited | Hospitality | 2025 |
| Luckee Collective Limited | Professional & scientific | 2025 |
| Lulec Ventilation Solutions Ltd | Professional & scientific | 2024 |
| Luna Aurora Management Ltd | Professional & scientific | 2025 |
| Luna PR & Marketing Ltd | Professional & scientific | 2018 |
| Lunch With ME Limited | Wholesale & retail | 2026 |
| Luscious Takeaway Ltd | Hospitality | 2026 |
| M Bailey Electrical Contractors Ltd | Construction | 2026 |
| M D Lawrence Limited | Construction | 2016 |
| M E Stewart Building Contractors Limited | Construction | 2015 |
| M&Co Homes Hawkinge (North) Ltd | Construction | 2020 |
| M&Co Homes Hawkinge (South) Ltd | Construction | 2020 |
| M&Co Homes Hawkinge (West) Ltd | Construction | 2020 |
| M&Co Homes Ltd | Construction | 2019 |
| Maas & Maas Ltd | Professional & scientific | 2021 |
| Macdonald Landscapes Ltd | Administrative & support | 2020 |
| Maharaj Superstore Limited | Wholesale & retail | 2021 |
| Maisie Retail Ltd | Professional & scientific | 2013 |
| Major Fabrications (Kent) Limited | Manufacturing | 1982 |
| Makara Marketing Limited | Real estate | 2019 |
| Manderley Estates Limited | Real estate | 2017 |
| Manor Films Ltd | Information & communication | 2010 |
| Manor View Homes Management Limited | Households | 2020 |
| Margate Hotel Limited | Hospitality | 2016 |
| Margetts Ltd | Wholesale & retail | 2023 |
| Marina Court (Deal) Limited | Households | 1989 |
| Marina View Management Company (Deal) Limited | Households | 2022 |
| Mario's Fish Bar Limited | Hospitality | 2023 |
| Mark R Parry Consultancy Ltd | Professional & scientific | 2017 |
| Markette Engineering Ltd | Construction | 2014 |
| Marlaville Properties Limited | Extraterritorial | 1975 |
| Martello Promotions Limited | Arts & recreation | 2015 |
| Martha Trust | Health & social care | 1997 |
| Maxx Racing Engines Ltd | Wholesale & retail | 2024 |
| MAY Lodge Management Limited | Households | 1991 |
| Maze House Medical Ltd | Professional & scientific | 2011 |
| Mclean Events, Conferences and Media Ltd | Information & communication | 2015 |
| Medium Morgan Ltd | Information & communication | 2015 |
| Melt in Your Mouth Ltd | Hospitality | 2025 |
| Menthol Ltd | Manufacturing | 2025 |
| Metaway PM Limited | Information & communication | 2023 |
| MF Estates Limited | Construction | 2003 |
| Mgwr Ltd | Professional & scientific | 2015 |
| MH Training & Consultancy Solutions Ltd | Professional & scientific | 2023 |
| Micaze Properties Limited | Households | 2015 |
| Mike's Electrical Supplies Ltd. | Wholesale & retail | 2012 |
| Mikes Plumbing Supplies Limited | Wholesale & retail | 2015 |
| Mildvalley Homes Limited | Extraterritorial | 2008 |
| MILES160 Ltd | Hospitality | 2025 |
| Mill Hill & Betteshanger C.I.C. | Construction | 2016 |
| Millennium Dawn Limited | Professional & scientific | 1998 |
| Mimi Poliana Limited | Manufacturing | 2017 |
| Mind Balance Ltd | Health & social care | 2023 |
| Minster Services Retail Park Limited | Construction | 2022 |
| Mirashare Limited | Extraterritorial | 2011 |
| Mirasnap Limited | Extraterritorial | 2025 |
| Mister FOX Ltd | Information & communication | 2014 |
| MJ Robinson Electrical Services Ltd | Construction | 2014 |
| Mkkd Ltd | Wholesale & retail | 2021 |
| Mmsac Ltd | Wholesale & retail | 2018 |
| Moat Stays Ltd | Real estate | 2021 |
| Modezero Limited | Information & communication | 1995 |
| Modular Music Education Ltd | Education | 2024 |
| Monro Developments Limited | Construction | 2001 |
| Monro Plant Limited | Administrative & support | 2005 |
| Moonshine Entertainment Ltd | Hospitality | 2020 |
| Morcam Electrical Limited | Construction | 2012 |
| More Than Furniture Limited | Wholesale & retail | 2013 |
| Moreton Court Flat Management Company Limited | Households | 1995 |
| Morgan Construction (Landscape) Ltd | Administrative & support | 2019 |
| Morgan Construction Building Services Limited | Construction | 2025 |
| Morgan P Utilities Limited | Construction | 2026 |
| Morris Consulting Services Ltd | Professional & scientific | 2023 |
| Morris Donaldson Limited | Construction | 2021 |
| Morrison Howe Ltd | Professional & scientific | 2016 |
| Morse House Limited | Arts & recreation | 2014 |
| Mossvine Limited | Construction | 2017 |
| Mountbatten House Management Company (Deal) Limited | Households | 2001 |
| MP Financial Services Ltd | Financial services | 2019 |
| Mpathy Group Limited | Information & communication | 2025 |
| Mpbsurveying Ltd | Professional & scientific | 2024 |
| Multibrain Limited | Health & social care | 2019 |
| Multinumber Ltd | Information & communication | 2026 |
| MVC Maintenance Ltd | Construction | 2017 |
| My Mortgage Solution Limited | Financial services | 2012 |
| My Salon Angels Limited | Information & communication | 2023 |
| My Seaside Luxury Ltd | Hospitality | 2012 |