| Matcha Culture Ltd | Manufacturing | 2024 |
| Matcha POW Ltd | Manufacturing | 2025 |
| Matcha Vela Limited | Real estate | 2022 |
| Matchbox Developments Ltd | Construction | 2023 |
| Matchday Travel Limited | Transport & logistics | 2026 |
| Matchie Group Limited | Information & communication | 2026 |
| Matchlab Ltd | Information & communication | 2026 |
| Matchworks 3D Ltd | Professional & scientific | 2021 |
| Matei Services Ltd | Transport & logistics | 2018 |
| Matelfi COR Ltd | Real estate | 2022 |
| Material Studios Ltd | Information & communication | 2020 |
| Mathew Street PUB Co Ltd | Hospitality | 2024 |
| Mathew Street Tavern Ltd | Hospitality | 2011 |
| Mathswell Ltd | Education | 2025 |
| Matias 24/7 Plumbing & Drainage Ltd | Construction | 2026 |
| Matisa Ltd | Real estate | 2022 |
| Matisview Ltd | Financial services | 2019 |
| Matlas Holdings Limited | Information & communication | 2025 |
| Matrefakt Ltd | Arts & recreation | 2019 |
| Matrix Buildrs Limited | Construction | 2025 |
| Matrix Marketing (UK) Limited | Financial services | 2004 |
| Matrix Polymers Limited | Manufacturing | 1991 |
| Matrix Training (UK) Limited | Financial services | 2004 |
| Mats Consultancy Ltd | Professional & scientific | 2018 |
| Matsar Limited | Financial services | 2018 |
| Matsim Consulting Limited | Professional & scientific | 2022 |
| Matsuri Ltd | Wholesale & retail | 2023 |
| Matt COX Ltd | Other services | 2004 |
| Matt MC Bride Limited | Administrative & support | 2018 |
| Matt Wilson Associates Limited | Information & communication | 2012 |
| Mattas Electrical Limited | Construction | 2024 |
| Matthew Brook Limited | Financial services | 2018 |
| Matthew Conning Consulting Ltd | Administrative & support | 2015 |
| Matthew Doherty Limited | Information & communication | 2024 |
| Matthew Mcerlean Ltd | Health & social care | 2025 |
| Matthew Store Ltd | Wholesale & retail | 2026 |
| Matthew Trotter Limited | Construction | 2025 |
| Matthews & Co Accountancy (NW) Ltd | Extraterritorial | 2015 |
| Matthews & Roberts Consultants Ltd | Professional & scientific | 2026 |
| Matthews J Holdings Ltd | Financial services | 2026 |
| Matthews Property Investments Ltd | Real estate | 2024 |
| Matthews Property Rooms Ltd | Real estate | 2025 |
| Matthews Sutton & Co Limited | Professional & scientific | 2014 |
| Matthews-Robinson Limited | Construction | 2024 |
| Mattravers Family Investment Company Limited | Financial services | 2025 |
| Matts Window Cleaning North West Ltd | Administrative & support | 2014 |
| Mattscaysbrookdigital Ltd. | Information & communication | 2016 |
| Matus Cccp Ltd | Financial services | 2017 |
| Matville Limited | Extraterritorial | 2013 |
| Maua Care Ltd | Health & social care | 2015 |
| Maude Guitars Ltd | Manufacturing | 2024 |
| Maul Industries LLP | | 2022 |
| Maunders Group Limited | Wholesale & retail | 2025 |
| Mauro Limited | Transport & logistics | 2019 |
| Mauve Capital Limited | Real estate | 2020 |
| MAV Scaffolding Ltd | Construction | 2024 |
| Maven Group Limited | Health & social care | 2022 |
| Maverick Hospitality Limited | Hospitality | 2019 |
| Maverick North West Ltd | Wholesale & retail | 2025 |
| Mavi Brow Bar Ltd | Other services | 2021 |
| Mavi&Co Limited | Health & social care | 2022 |
| Mavic Care Ltd | Administrative & support | 2015 |
| Mavimor Consultancy Limited | Professional & scientific | 2018 |
| Mavitas Industries Ltd | Wholesale & retail | 2026 |
| Mavraza Ltd | Professional & scientific | 2019 |
| MAW Management Limited | Professional & scientific | 2018 |
| MAW Ventures Ltd | Hospitality | 2025 |
| Mawholesale Clothing Limited | Wholesale & retail | 2025 |
| MAX & Teddy Wealth Limited | Wholesale & retail | 2021 |
| MAX Air Solutions Ltd | Construction | 2021 |
| MAX Garage Ltd | Transport & logistics | 2016 |
| MAX Global Power Limited | Real estate | 2020 |
| MAX Home Innovations Ltd | Construction | 2020 |
| MAX Indian&Ireland Building Co Ltd | Construction | 2018 |
| MAX International Ltd | Administrative & support | 2018 |
| MAX Nicholson Limited | Real estate | 2025 |
| MAX Properties Investment Ltd | Real estate | 2023 |
| MAX Properties Limited | Administrative & support | 2018 |
| Maxam Training Ltd | Education | 2010 |
| Maxcare Liverpool Ltd | Health & social care | 2025 |
| Maxe Developments Ltd | Real estate | 2025 |
| Maxeli LLP | | 2019 |
| Maxell Utilities Ltd | Wholesale & retail | 2018 |
| Maxfield Solutions Limited | Wholesale & retail | 2023 |
| Maxi (NW) Ltd | Real estate | 2025 |
| Maxi Developments (NW) Limited | Construction | 2012 |
| Maxi.Nourish Limited | Manufacturing | 2025 |
| Maximise Energy NW Ltd | Construction | 2024 |
| Maximum Impact Solutions Limited | Information & communication | 2001 |
| Maximum Lift Trucks Limited | Manufacturing | 2001 |
| Maxinutrition Limited | Transport & logistics | 1995 |
| Maxleaduk Limited | Wholesale & retail | 2023 |
| Maxmarket E-Commerce Ltd | Wholesale & retail | 2025 |
| Maxon Transport Solutions Limited | Transport & logistics | 2013 |
| Maxpower Semiconductor, U.K. Limited | Manufacturing | 2019 |
| Maxtech Services Ltd | Information & communication | 2024 |
| Maxters Workers Group Ltd | Construction | 2026 |
| Maxwell Clerk Limited | Administrative & support | 2020 |
| Maxwell Financial Planning Ltd | Financial services | 2009 |
| Maxwell Gallery Limited | Wholesale & retail | 2025 |