| Meds Online Ltd | Wholesale & retail | 2024 |
| Medscare (UK) Limited | Wholesale & retail | 2008 |
| Medspace Yorkshire Limited | Real estate | 2022 |
| Medtech Global Trade Partners Limited | Administrative & support | 2025 |
| Medtech Projects Ltd | Professional & scientific | 2020 |
| Medx Research Center Ltd | Education | 2025 |
| Mega Bargain Wholesale Ltd | Wholesale & retail | 2025 |
| Megan Kennerley Limited | Professional & scientific | 2024 |
| Mehra Properties Ltd | Real estate | 2025 |
| Mehranbarber Ltd | Other services | 2025 |
| Mehwesh Medi Care Limited | Real estate | 2022 |
| Meilicious Huddersfield Ltd | Hospitality | 2018 |
| Melanie Lawley Limited | Professional & scientific | 2017 |
| Melanie Lenihan Ltd | Professional & scientific | 2023 |
| Meldec Decorators Ltd | Professional & scientific | 2023 |
| Meldec Interior Design & Concept Ltd | Professional & scientific | 2024 |
| Melinda Scarfe Limited | Wholesale & retail | 2012 |
| Melissa Rainey Design Ltd | Professional & scientific | 2019 |
| Mellor & Hammond Limited | Real estate | 2020 |
| Mellor Joinery Limited | Construction | 2000 |
| Meltham Estates Ltd | Real estate | 2025 |
| Meltham Medical Limited | Real estate | 2024 |
| Meltham Restaurant Ltd | Hospitality | 2015 |
| Meltham Takeaway Ltd | Hospitality | 2015 |
| Melv Ltd | Wholesale & retail | 2026 |
| Melwood 2 Limited | Construction | 2008 |
| Melwood Lettings Limited | Real estate | 2019 |
| Melwood Limited | Wholesale & retail | 1999 |
| Memarket Limited | Wholesale & retail | 2023 |
| Mempur Ltd | Manufacturing | 2025 |
| Mena Foods Limited | Wholesale & retail | 2019 |
| Mencap in Kirklees | Health & social care | 1989 |
| Mensa Printers Limited | Real estate | 2026 |
| Menston Property Investments Limited | Real estate | 2020 |
| Menston Property Limited | Real estate | 2020 |
| Menston Residential Properties Limited | Real estate | 2021 |
| Mentumetrics Ltd | Professional & scientific | 2026 |
| Menz Builders Ltd | Construction | 2025 |
| MEP Contracting Ltd | Construction | 2006 |
| Mercantile Products Limited | Construction | 1995 |
| Merch Giant Ltd | Wholesale & retail | 2022 |
| Merchant Central Ltd | Wholesale & retail | 2023 |
| Mereden Miniatures Ltd | Manufacturing | 2021 |
| Mereside Property Holdings Limited | Real estate | 2024 |
| Meridian Consultancy Limited | Information & communication | 2026 |
| Merit Resources Limited | Professional & scientific | 2003 |
| Merlin Motors Huddersfield Limited | Wholesale & retail | 2023 |
| Merlot Enterprise Ltd | Wholesale & retail | 2024 |
| Merlot Manor Limited | Hospitality | 2021 |
| Meronman Limited | Transport & logistics | 1988 |
| Merrie England Coffee Shops Limited | Wholesale & retail | 2024 |
| Merry and Bright Limited | Professional & scientific | 2019 |
| Merrydale Properties Ltd. | Real estate | 2011 |
| Merrymama Ltd | Wholesale & retail | 2025 |
| Mersol Limited | Wholesale & retail | 2017 |
| MES Estates Ltd | Construction | 2016 |
| MES Healthcare Ltd | Professional & scientific | 2021 |
| Mesob Ltd | Manufacturing | 2018 |
| MET Consutants Limited | Public administration | 2022 |
| Met-Elec (Yorkshire) Limited | Construction | 2025 |
| META4FASHION Ltd | Wholesale & retail | 2022 |
| Metabolic Health International Ltd | Health & social care | 2020 |
| Metabolic Health London LLP | | 2025 |
| Metal Boutique Limited | Manufacturing | 2013 |
| Metamorphosis Finance Limited | Professional & scientific | 2019 |
| Metaphorum Co-Operative Ltd | Professional & scientific | 2024 |
| Metashare Consultancy Ltd | Information & communication | 2021 |
| Metor Group Ltd | Transport & logistics | 2025 |
| Metro Cars (Hudds) Limited | Transport & logistics | 2014 |
| Metro Eco Group Limited | Construction | 2012 |
| Metro Starcare Ltd | Construction | 1987 |
| Metropolitan Technology Consulting Ltd | Administrative & support | 2012 |
| Mettle Muscle Ltd | Education | 2023 |
| Mexicali Ltd | Hospitality | 2020 |
| Mezuri Ltd | Extraterritorial | 2024 |
| MF Bargains Limited | Wholesale & retail | 2021 |
| MF Biome Ltd | Wholesale & retail | 2026 |
| MF Cooling Solutions Ltd | Construction | 2020 |
| MF Health and Sport Ltd | Professional & scientific | 2015 |
| MF Opex Partners Ltd | Professional & scientific | 2024 |
| Mf(Uk) Ltd | Wholesale & retail | 2017 |
| MFA Ophthalmic Solutions Limited | Health & social care | 2011 |
| MFH Locum Services Limited | Other services | 2008 |
| MFH Residentials Ltd | Real estate | 2025 |
| MFI Investments Ltd | Real estate | 2020 |
| MFL Insights Limited | Extraterritorial | 2025 |
| MFM Medical Ltd | Health & social care | 2024 |
| MFS Ophthalmic Services Limited | Wholesale & retail | 2008 |
| Mfsr Pharma Ltd | Other services | 2014 |
| Mfuzed Ltd | Administrative & support | 2013 |
| MG Audio Limited | Information & communication | 2021 |
| MG Electrical Contractors Limited | Construction | 2003 |
| MGA Property Management Limited | Real estate | 2025 |
| MGD Property Investments Limited | Real estate | 2022 |
| Mger Limited | Administrative & support | 2014 |
| Mgspiral Ltd | Wholesale & retail | 2016 |
| MGW Properties (Huddersfield) Ltd | Real estate | 2025 |
| Mgwm Limited | Professional & scientific | 2023 |
| MH Airport Travels Ltd | Transport & logistics | 2023 |
| MH Business Transformation Limited | Administrative & support | 2015 |