| Murder Mystery Investigations Ltd | Information & communication | 2019 |
| Murder Mystery Weekends Limited | Extraterritorial | 2019 |
| Murfitz Ltd | Real estate | 2020 |
| Murky Jobs Ltd | Administrative & support | 2025 |
| Murlan Properties Limited | Real estate | 2026 |
| Murlies UK Estates Ltd | Real estate | 2023 |
| Murlies UK Ltd | Construction | 2019 |
| Murph Limited | Information & communication | 2020 |
| Murph Properties Ltd | Real estate | 2022 |
| Murphy & Co NW Limited | Professional & scientific | 2015 |
| Murphy & Murphy Limited | Health & social care | 2023 |
| Murphy Consulting Group Ltd. | Information & communication | 2020 |
| Murphy Convenience Store Ltd | Wholesale & retail | 2025 |
| Murphy Dillon Properties Ltd | Real estate | 2024 |
| Murphy Estates Limited | Real estate | 2015 |
| Murphy Legacy Holdings Ltd | Real estate | 2026 |
| Murphy Property Estates Ltd | Real estate | 2014 |
| Murphy Scrap Metal Processors Limited | Water & waste | 2004 |
| Murphy Telecommunication Limited | Information & communication | 2025 |
| Murphy's GIN Ltd | Manufacturing | 2018 |
| Murphy’S Motors Ltd | Wholesale & retail | 2026 |
| Murray Cook Limited | Real estate | 2021 |
| Murray Pharm Services Ltd | Wholesale & retail | 2017 |
| MUS MM Ltd | Transport & logistics | 2025 |
| Musability Ltd | Health & social care | 2013 |
| Musaid Property Ltd | Real estate | 2025 |
| Musc Property Ltd | Real estate | 2026 |
| Muscart Consultancy Limited | Other services | 2024 |
| Museum Exhibition Services UK Ltd. | Arts & recreation | 2016 |
| Mushroom Developments NW Ltd | Real estate | 2024 |
| Mushroom Future Ltd | Manufacturing | 2025 |
| Music & the Rest Ltd | Information & communication | 2021 |
| Music Cult Ltd | Information & communication | 2019 |
| Music in Unison Events LLP | | 2023 |
| Music Spins the Planet Ltd | Manufacturing | 2026 |
| Musical MAN Ltd | Arts & recreation | 2024 |
| Musical Minds Ltd | Education | 2019 |
| Musical Youth Merseyside Limited | Arts & recreation | 2003 |
| Musicmatch Limited | Real estate | 1996 |
| Musicplace North-West | Health & social care | 2010 |
| Musicseen CIC | Information & communication | 2023 |
| Musker & Ireland T/A Land Hills Ltd | Administrative & support | 2015 |
| Musker Developments Limited | Construction | 2013 |
| Musker Electrical Ltd | Construction | 2011 |
| Musker Street Flat Management Company Limited | Households | 1996 |
| Muskers News Ltd | Wholesale & retail | 2025 |
| Musketeer Investments Limited | Real estate | 1999 |
| Muskox Holding Company Ltd | Manufacturing | 2020 |
| Muskwe Properties Limited | Real estate | 2023 |
| Muslim Enterprise Development Service | Professional & scientific | 2001 |
| Muslim Women's Youth, Sport & Education Forum, Merseyside | Education | 2001 |
| Mussa & Issa Traders Ltd | Wholesale & retail | 2025 |
| Mustard Care Group Ltd | Health & social care | 2024 |
| Mustard Seed Construction Limited | Construction | 2023 |
| Mustard Seed Gardens Limited | Administrative & support | 2022 |
| Musty Limited | Information & communication | 2026 |
| Mutambsn Ltd | Wholesale & retail | 2012 |
| Muteg Ltd | Information & communication | 2019 |
| Muthana Ltd | Hospitality | 2018 |
| Mutleys Motors Ltd | Wholesale & retail | 2026 |
| Mutua Credit Services Ltd | Other services | 2021 |
| Mutual Land Group Limited | Construction | 2019 |
| Mutus Tech Ltd | Information & communication | 2021 |
| Muve International Ltd. | Wholesale & retail | 2025 |
| MUY Traders Ltd | Wholesale & retail | 2024 |
| Muzamul Properties Ltd | Real estate | 2026 |
| Muziek Events Ltd | Arts & recreation | 2024 |
| Muzzah Electrical Services Ltd | Construction | 2026 |
| MV Patisserie Ltd | Hospitality | 2024 |
| MVA Global Energy and Infrastructure Advisors Ltd | Professional & scientific | 2023 |
| MVM Consulting Limited | Professional & scientific | 2023 |
| MVM NW Ltd | Wholesale & retail | 2022 |
| Mvmt Design Limited | Construction | 2021 |
| MVS Property Group Ltd | Real estate | 2024 |
| MW Access Ltd | Other services | 2022 |
| MW Aesthetics Clinic and Academy Ltd | Education | 2025 |
| MW Autocare Limited | Wholesale & retail | 2024 |
| MW Autocare MOT Limited | Wholesale & retail | 2025 |
| MW Business Advisers Limited | Administrative & support | 2014 |
| MW Fashion Consultant Ltd | Professional & scientific | 2024 |
| MW Finishes Limited | Construction | 2026 |
| MW Fire & Security Limited | Administrative & support | 2022 |
| MW Portfolio Group Ltd | Real estate | 2022 |
| MW Power & Controls Ltd | Construction | 2026 |
| MW Property Invest Ltd | Professional & scientific | 2020 |
| MW Service Solutions Limited | Administrative & support | 2016 |
| MW Social Advisor Ltd | Professional & scientific | 2025 |
| MW Telecoms NW Ltd | Information & communication | 2022 |
| Mw&Sp Properties Ltd | Real estate | 2020 |
| MWB Estates Ltd | Real estate | 2024 |
| MWE Consultancy Services Ltd | Professional & scientific | 2025 |
| MWE Property Holdings Ltd | Real estate | 2025 |
| Mwfdservices Limited | Information & communication | 2022 |
| MWG Aviation Ltd | Transport & logistics | 2024 |
| MWH Associates Limited | Professional & scientific | 2000 |
| Mwinnumbo Company Limited | Health & social care | 2024 |
| MWM Online Ltd | Wholesale & retail | 2021 |
| MWS Joinery Services Limited | Construction | 2017 |
| MWS Maintenance NW Limited | Construction | 2025 |
| MWS Properties NW Ltd | Real estate | 2024 |