| Marketo LP | | 2018 |
| Marketta Ltd | Professional & scientific | 2023 |
| Markev Properties Limited | Other services | 2025 |
| Marko Techhouse Ltd | Information & communication | 2025 |
| Marks AI Limited | Information & communication | 2026 |
| Marks and Spencer (Initial LP) Limited | Professional & scientific | 2007 |
| Marksman PUB Ltd | Wholesale & retail | 2022 |
| Marktomarket Valuations Limited | Professional & scientific | 2016 |
| Marland Investments Ltd. | Real estate | 1992 |
| Marlena Professional Cleaning Services Ltd | Administrative & support | 2026 |
| Marley Associates L.P. | | 2011 |
| Marley Enterprises L.P. | | 2016 |
| Marley Services L.P. | | 2010 |
| Marlfield Contracts Limited | Construction | 2025 |
| Marlin Capital LP | | 2010 |
| Marlingtone Management LP | | 2012 |
| Marlom Trade LP | | 2014 |
| Marlow Business LP | | 2015 |
| Marlow Impex LP | | 2013 |
| Marlow Ventures LP | | 2015 |
| Marlow's Fitness Limited | Arts & recreation | 2019 |
| Marlowe & Hastings Ltd | Financial services | 2023 |
| Marlowe Assets LP | | 2014 |
| Marmalade Management Consulting Limited | Professional & scientific | 2021 |
| Marmax Europe L.P. | | 2009 |
| Marmoen Trading LP | | 2016 |
| Marn Investments LP | | 2020 |
| Marnet LP | | 2015 |
| Marnic Wealth Limited | Financial services | 2025 |
| Marobert's Limited | Manufacturing | 2014 |
| Maroon Services Ltd | Construction | 2026 |
| Marouf’S Ltd | Wholesale & retail | 2025 |
| Marpale LP | | 2026 |
| Marport Logistics LP | | 2013 |
| Marqo Group LP | | 2016 |
| Marqui Investment LP | | 2013 |
| Marriott Property Limited | Real estate | 2026 |
| Marrytone Impex LP | | 2012 |
| Mars Bed&Breakfast Properties Ltd | Hospitality | 2024 |
| Marsalan Corp. LP | | 2016 |
| Marsell Capital LP | | 2013 |
| Marsell Fortune LP | | 2015 |
| Marsh Trade LP | | 2019 |
| Marshall Auto Spares Ltd | Extraterritorial | 2018 |
| Marshall Construction and Roofing Ltd | Construction | 2024 |
| Marshall Properties Edinburgh Limited | Real estate | 2024 |
| Marshall Property Enterprises Limited | Hospitality | 2021 |
| Marshall Spirits Ltd | Information & communication | 2023 |
| Marshann Property Management Ltd | Real estate | 2022 |
| Marstone Capital LP | | 2015 |
| Mart Global LP | | 2014 |
| Mart More Property Maintenance Limited | Construction | 2023 |
| Marta Developments LP | | 2015 |
| Martech Consult Holdings LP | | 2019 |
| Martech Consult LP | | 2016 |
| Martel Cooperation LP | | 2015 |
| Martel Corporation L.P. | | 2011 |
| Martello Industrial L.P. | | 2011 |
| Marten Business LP | | 2016 |
| Martex Business LP | | 2014 |
| Martex International LP | | 2015 |
| Martha & Marsha Estates Limited | Real estate | 2020 |
| Martha Street Holdco Limited | Professional & scientific | 2020 |
| Martha Street Holdings Limited | Professional & scientific | 2020 |
| Martin & Martin Theatre Company Ltd | Arts & recreation | 2020 |
| Martin Boyle Limited | Other services | 2016 |
| Martin Coach and Car Care Limited | Manufacturing | 2020 |
| Martin Currie Asia Unconstrained Trust PLC | Financial services | 1985 |
| Martin Currie European Capital Partners L.P. | | 2003 |
| Martin Currie Limited | Professional & scientific | 1978 |
| Martin Currie Management Limited | Professional & scientific | 2017 |
| Martin Currie Trustees Limited | Administrative & support | 1993 |
| Martin Laurie Limited | Hospitality | 2008 |
| Martin Lydon Limited | Professional & scientific | 2022 |
| Martin Mcguire International Real Estate Ltd | Real estate | 2015 |
| Martin Parry Productions Limited | Information & communication | 2004 |
| Martin Property FIX Limited | Construction | 2025 |
| Martin Schneider LP | | 2019 |
| Martin Shek Limited | Hospitality | 2009 |
| Martin Siering LP | | 2022 |
| Martin Trade LP | | 2016 |
| Martin White Consultancy Ltd | Health & social care | 2020 |
| Martin Wishart Ltd | Other services | 2020 |
| Martine Partners LP | | 2017 |
| Martinhouse Trade LP | | 2012 |
| Martinica SP | | 2001 |
| Martins Removal Services Ltd. | Transport & logistics | 2021 |
| Marton Power LLP | | 2014 |
| Martone Ltd | Real estate | 2021 |
| Martony Dolan Associates Limited | Professional & scientific | 2013 |
| Martronix Balanced Engineering Ltd | Manufacturing | 2026 |
| Maruka LP | | 2003 |
| Marutee PVT Ltd | Wholesale & retail | 2024 |
| Marutomo Limited | Agriculture & fishing | 2018 |
| Marveg LP | | 2014 |
| Marvel Alliance LP | | 2017 |
| Marvel Bay SP | | 2004 |
| Marvel Direct LP | | 2014 |
| Marvell Trade LP | | 2016 |
| Marvitex LP | | 2017 |