| Matador Solutions Ltd | Information & communication | 2025 |
| Matador Trading LP | | 2015 |
| Matai Corporate Advisory Limited | Professional & scientific | 2019 |
| Matarbes & Co. | | 2009 |
| Match Point (Hospitality) Limited | Administrative & support | 1996 |
| Matcha Sando Limited | Hospitality | 2025 |
| Matcham Consulting LP | | 2012 |
| Matchamind Ltd | Hospitality | 2023 |
| Matchpoint Marketing Ltd | Administrative & support | 2025 |
| Matchtex Production LP | | 2017 |
| Matchya Ltd | Wholesale & retail | 2025 |
| Matcorr Limited | Professional & scientific | 2020 |
| Mate-Tea.Co.Uk Ltd. | Wholesale & retail | 2017 |
| Matech Design Solutions Ltd | Professional & scientific | 2017 |
| Mateen & Sons Limited | Wholesale & retail | 2023 |
| Matelsa Corporation LP | | 2016 |
| Mateo Group LP | | 2016 |
| Material Corporation L.P. | | 2012 |
| Material Developments Distribution Limited | Administrative & support | 2020 |
| Material Developments Limited | Manufacturing | 2020 |
| Material Imports/Exports L.P. | | 2012 |
| Mather Consulting Limited | Professional & scientific | 2007 |
| Mathers (East END) Limited | Hospitality | 2006 |
| Mathers (West END) Limited | Hospitality | 2006 |
| Mathers Edinburgh Ltd | Hospitality | 2023 |
| Matheson Consultancy Limited | Health & social care | 2016 |
| Matheson Education Consultancy Ltd. | Education | 2009 |
| Matheson Glynn Ltd | Real estate | 2017 |
| Mathias Innovative Bathroom Ltd | Construction | 2024 |
| Mathilde S'Affiche LP | | 2026 |
| Maths Pass Ltd | Education | 2025 |
| Matiser Ltd | Transport & logistics | 2024 |
| Matisse Spirits Company Limited | Manufacturing | 2004 |
| Matlock Impex LP | | 2017 |
| Matlock Trading LP | | 2013 |
| Mato Events Limited | Hospitality | 2018 |
| Matriarch Group Ltd | Administrative & support | 2025 |
| Matriix Property Management Limited | Real estate | 2011 |
| Matrix Advanced NDT Inspection Services Limited | Construction | 2018 |
| Matrix Engineering Consultancy Ltd | Professional & scientific | 2018 |
| Matrix Import L.P. | | 2011 |
| Matrix Industrial L.P. | | 2009 |
| Matrix Properties Management LP | | 2013 |
| Matrix Property Network (Scotland) Limited | Real estate | 2025 |
| Matrix Risk Consulting Ltd | Professional & scientific | 2011 |
| Matrix SLP | | 2008 |
| Matrixa Complex L.P. | | 2014 |
| Matrixa L.P. | | 2012 |
| Matrodo LLP | | 2021 |
| Matross Limited | Financial services | 2014 |
| Mats Capital LP | | 2025 |
| Matson Properties Limited | Real estate | 1980 |
| Matt Crossan Associates Limited | Other services | 2017 |
| Matt Irwin Plumber & Handyman Ltd | Construction | 2025 |
| Mattac Limited | Professional & scientific | 2018 |
| Mattboris Properties Limited | Real estate | 2026 |
| Matter a LP | | 2015 |
| Matter of Fact Software Limited | Information & communication | 2008 |
| Matter of Focus Ltd | Professional & scientific | 2017 |
| Matterhorn Project Management Limited | Professional & scientific | 2010 |
| Mattest Site Services Limited | Construction | 2001 |
| Mattias Industry LP | | 2016 |
| Matto Newington Ltd | Professional & scientific | 2023 |
| Matto Restaurant Ltd | Hospitality | 2021 |
| Matuba Investment SP | | 2003 |
| Matyldas Properties Ltd | Real estate | 2022 |
| Maud Property Management Limited | Hospitality | 1999 |
| Maughan Financial Services Limited | Professional & scientific | 2008 |
| Maulcant Trading LP | | 2014 |
| Maurin Capital LP | | 2013 |
| Mauto Global LP | | 2021 |
| Mauvetramp Limited | Agriculture & fishing | 1996 |
| Maveco Machinery Ltd | Manufacturing | 2023 |
| Maven Spirits Limited | Professional & scientific | 2017 |
| Maverick Photo Agency Limited | Professional & scientific | 2008 |
| Maverick Solutions Limited | Water & waste | 2004 |
| Maverick Words Limited | Information & communication | 2017 |
| Mavericks Holding LP | | 2021 |
| Maverin Global LP | | 2016 |
| Mavi Studios Ltd | Real estate | 2024 |
| Mavira Group LP | | 2016 |
| Mavisbank Trust | Construction | 2002 |
| Mavor Capital Limited | Real estate | 2020 |
| Mavsoft Limited | Information & communication | 2019 |
| Mawh Ltd | Wholesale & retail | 2024 |
| Mawson Property Limited | Construction | 2017 |
| MAX 102 Ltd | Hospitality | 2018 |
| MAX 200 Ltd | Hospitality | 2018 |
| MAX 202 Ltd | Hospitality | 2018 |
| MAX Akin Limited | Information & communication | 2023 |
| MAX Brown Joinery & Building Ltd | Construction | 2024 |
| MAX Christie Limited | Other services | 2019 |
| MAX Farma LP | | 2014 |
| MAX Macallan Limited | Administrative & support | 2020 |
| MAX Motions Limited | Professional & scientific | 2025 |
| MAX Scott Builders Ltd | Construction | 2023 |
| MAX Solutions Worldwide L.P. | | 2012 |
| MAX24 Ltd | Wholesale & retail | 2023 |
| Maxaim Construction Ltd | Construction | 2022 |
| Maxam International Ltd | Administrative & support | 2014 |