| Lojinx Ltd | Information & communication | 2011 |
| Loln Limited | Real estate | 2022 |
| London Alternative Photography Collective CIC | Education | 2019 |
| London and County Financial Advisors Limited | Professional & scientific | 2016 |
| London and County Property Holdings Limited | Real estate | 2021 |
| Longrun Artistes Agency Ltd | Arts & recreation | 2017 |
| Look MUM Museum Branch Ltd | Arts & recreation | 2020 |
| Looking Ahead (Thanet) Limited | Hospitality | 2012 |
| Loomio.Ai Ltd | Information & communication | 2026 |
| Looping the Loop CIC | Arts & recreation | 2019 |
| Lording IT UP Ltd | Hospitality | 2025 |
| Lorens Digital Limited | Professional & scientific | 2022 |
| Louis Watkins Limited | Administrative & support | 2015 |
| Louisa Lounge Limited | Hospitality | 2024 |
| Louise Bader-Morrison Limited | Professional & scientific | 2010 |
| Lovetts Ramsgate Limited | Real estate | 2006 |
| Lowd Vans Ltd | Manufacturing | 2025 |
| Loyal Friend Ltd | Agriculture & fishing | 2026 |
| Lppl Roofing Limited | Construction | 2015 |
| LSF Building Services Ltd | Construction | 2011 |
| Lsrainbowart Ltd | Arts & recreation | 2025 |
| Lumeon Holdings Ltd | Financial services | 2025 |
| Lumpinee Group Ltd | Real estate | 2025 |
| Lumpinee Logistics Limited | Transport & logistics | 2015 |
| Lureland Properties Limited | Real estate | 1965 |
| LV Smart Ltd | Wholesale & retail | 2022 |
| Lyons & Annoot Holdings Limited | Construction | 2023 |
| M & D Transport (Thanet) Ltd | Transport & logistics | 2022 |
| M & M Project Management Limited | Extraterritorial | 2015 |
| M & M Takeway Limited | Hospitality | 2025 |
| M and J Steel Ltd | Construction | 2017 |
| M and M Personal Assistants Ltd | Health & social care | 2020 |
| M and M Pets Ltd | Wholesale & retail | 2018 |
| M Cutts Civil Engineering Limited | Professional & scientific | 2015 |
| M G & P Company Limited | Real estate | 1999 |
| M Hill Installations Ltd | Construction | 2023 |
| M I Plumbing and Heating South East Ltd | Construction | 2020 |
| M J Evans Interiors Ltd | Construction | 2010 |
| M Performance Ltd | Wholesale & retail | 2020 |
| M&E Cars Ltd | Transport & logistics | 2026 |
| M&K Padfield Properties Ltd | Real estate | 2020 |
| M&P Lamb Investments Ltd | Financial services | 2026 |
| M. Robinson Ground Works Ltd | Construction | 2010 |
| MAC Sales and Marketing Limited | Professional & scientific | 2024 |
| Mack HR Ltd | Administrative & support | 2020 |
| Mack Property Ltd | Real estate | 2020 |
| Magnaspire Ltd | Wholesale & retail | 2019 |
| Magnolia Drive (Ashford) Limited | Extraterritorial | 2012 |
| Mags Haulage Ltd | Transport & logistics | 2025 |
| MAI Clothing Ltd. | Manufacturing | 2024 |
| Maidright 1 Ltd | Administrative & support | 2023 |
| Maidstone Print Ltd | Manufacturing | 2016 |
| Major Site Services Ltd | Construction | 2018 |
| Makaram Star Ltd | Wholesale & retail | 2020 |
| Maltransportation Ltd | Transport & logistics | 2018 |
| Mama's Feast Ltd | Wholesale & retail | 2025 |
| Man-Mountain and Company (U.K.) Limited | Extraterritorial | 2000 |
| Manchester Craft Beer Festival Limited | Hospitality | 2020 |
| Manna House Consulting Limited | Professional & scientific | 2004 |
| Manspace Community CIC | Health & social care | 2025 |
| Manston History Museum | Arts & recreation | 2018 |
| Manston History Naafi Cafe Limited | Hospitality | 2023 |
| Manston Landrover Repair Centre Ltd | Wholesale & retail | 2020 |
| Manston Park Living Limited | Construction | 2016 |
| Manston Spitfire and Hurricane Memorial Trust Limited | Arts & recreation | 1995 |
| Manyweathers Commercial Ltd | Real estate | 2026 |
| Manyweathers Consultancy Ltd | Real estate | 2025 |
| Manyweathers Developments Ltd | Construction | 2024 |
| Manyweathers Ltd | Real estate | 2025 |
| Manyweathers Properties Limited | Construction | 2005 |
| Marc One Security Limited | Administrative & support | 2020 |
| Marcella Salons Ltd | Other services | 2019 |
| Margate Bar Co Ltd | Real estate | 2024 |
| Margate Ices Limited | Manufacturing | 2025 |
| Margo in Margate Ltd | Arts & recreation | 2024 |
| Mariechen Limited | Administrative & support | 2024 |
| Marine Boat Mouldings Limited | Manufacturing | 2016 |
| Maritime HR Consultancy Ltd | Administrative & support | 2015 |
| Mark & Sons Property Ltd | Real estate | 2017 |
| Mark Avery Building Ltd | Construction | 2017 |
| Mark LGV1 Ltd | Transport & logistics | 2018 |
| MAS Develop Ltd | Construction | 2019 |
| MAS IG SPV3 Limited | Construction | 2021 |
| Masebo Ltd | Wholesale & retail | 2021 |
| Mash the Tate Limited | Information & communication | 2015 |
| Mastermax Limited | Wholesale & retail | 2017 |
| Masterweld Engineering Ltd | Construction | 2009 |
| Matemba Limited | Wholesale & retail | 2016 |
| Matilda Property Investments Ltd | Real estate | 2025 |
| Matt Phillips Architects Ltd | Professional & scientific | 2026 |
| Matthew Alexander Fine Art Limited | Arts & recreation | 2003 |
| Matthew Price Costume Design Ltd | Information & communication | 2024 |
| Maxpol Trading Limited | Wholesale & retail | 2022 |
| Maxted Construction Limited | Construction | 2011 |
| MB Auto Solutions Ltd | Wholesale & retail | 2025 |
| Mccann Vehicle Solutions Ltd | Manufacturing | 2017 |
| Mcgan Tech (UK) Limited | Professional & scientific | 2024 |
| Mcgivern Services Limited | Construction | 2023 |
| Mcwa Production Limited | Manufacturing | 2026 |
| Md's Ozzie Opals UK Ltd | Wholesale & retail | 2026 |