| Mulla IT Services Ltd | Information & communication | 2013 |
| Mullaco (Dewsbury) Ltd | Wholesale & retail | 2008 |
| Mullaco (Heckmondwike) Ltd | Wholesale & retail | 2020 |
| Multi Brands Media Ltd | Professional & scientific | 2020 |
| MUNEEBRETAILERS596 Ltd | Wholesale & retail | 2024 |
| Murco Fleet Support Limited | Wholesale & retail | 2007 |
| Musa Patels LLP | | 2010 |
| Musa Patels Solicitors Ltd | Professional & scientific | 2023 |
| Musab Consultants Ltd | Professional & scientific | 2024 |
| Muscle Bound Gym Manchester Ltd | Arts & recreation | 2026 |
| Muscle Target Gym Ltd | Arts & recreation | 2019 |
| Muses Gleam Global Ltd | Financial services | 2024 |
| Music Learning for Kids Ltd | Information & communication | 2025 |
| MVE Electrical Projects Ltd | Construction | 2021 |
| MWA Project Management Limited | Construction | 2024 |
| MWB Global Ltd | Wholesale & retail | 2024 |
| MXM Management Ltd | Transport & logistics | 2025 |
| My Barnies Dewsbury Ltd | Hospitality | 2024 |
| My Deli Xtra Ltd | Hospitality | 2022 |
| My Home Stuff Ltd | Wholesale & retail | 2025 |
| My Khyber Ltd | Hospitality | 2025 |
| My Mind Services Ltd | Health & social care | 2019 |
| My Prime Location Ltd | Financial services | 2022 |
| My Sleep Ltd | Wholesale & retail | 2015 |
| My Staff (Europe) Ltd | Professional & scientific | 2018 |
| My Swat Ltd | Hospitality | 2025 |
| Mybedsuk Ltd | Manufacturing | 2025 |
| Mylos Holdings Ltd | Real estate | 2026 |
| Myton Kitchens Holdings Limited | Financial services | 2022 |
| Myton Kitchens Limited | Manufacturing | 2002 |
| MZ Active Ltd | Professional & scientific | 2021 |
| MZS Locum Limited | Health & social care | 2022 |
| N & P Recycling Limited | Water & waste | 2010 |
| N & S Medicals Limited | Health & social care | 2010 |
| N Tyres Yorkshire Ltd | Wholesale & retail | 2011 |
| N&S Power Jump Ltd | Wholesale & retail | 2025 |
| N.A.Stott and Sons Fabrications Ltd | Manufacturing | 2020 |
| Nadmin Limited | Administrative & support | 2014 |
| Naeema AGA Limited | Administrative & support | 2016 |
| Nafa Technology Ltd | Wholesale & retail | 2022 |
| Nams Accountants Ltd | Professional & scientific | 2011 |
| Naniya Ltd | Wholesale & retail | 2026 |
| Naptastic Ltd | Wholesale & retail | 2025 |
| Narmi Property Ltd | Real estate | 2017 |
| Narmi-Tech Ltd | Wholesale & retail | 2020 |
| Nationwide Parcel Services Ltd | Transport & logistics | 2022 |
| Natty DAN 2020 Limited | Construction | 2020 |
| Natural Remedy Ltd | Other services | 2025 |
| NAV A2Z Ltd | Transport & logistics | 2018 |
| NAV Fast Courier Services Ltd | Transport & logistics | 2019 |
| NAW Properties Limited | Real estate | 2025 |
| Nayaab Events Ltd | Hospitality | 2019 |
| Naykh and Sons Ltd | Real estate | 2024 |
| NAZ Rentals Limited | Real estate | 2021 |
| NAZ Waitering Ltd | Hospitality | 2019 |
| NB Digital Solutions Ltd | Professional & scientific | 2021 |
| NB Knowhow Limited | Information & communication | 2015 |
| NDM Marketing Limited | Professional & scientific | 2023 |
| Nelson Management Limited | Professional & scientific | 2016 |
| Nemesis Beds Ltd | Manufacturing | 2026 |
| Neon Brewing Ltd | Manufacturing | 2021 |
| Neonbay Ltd | Wholesale & retail | 2024 |
| Nest & Best Ltd | Manufacturing | 2025 |
| Neta Trading UK Ltd | Wholesale & retail | 2024 |
| Netzcom Ltd | Wholesale & retail | 2023 |
| New Bonnie Chinese Takeaway Ltd | Hospitality | 2024 |
| New Dreamworld Beds Ltd | Manufacturing | 2023 |
| New Mayfair Properties Ltd | Real estate | 2025 |
| New Phoenix Properties Ltd | Construction | 2026 |
| New Pioneer Restaurant Ltd | Hospitality | 2022 |
| New Stack'D Limited | Hospitality | 2025 |
| New Stripey Tiger Ltd | Hospitality | 2025 |
| Newgate Stainless Limited | Manufacturing | 1991 |
| Newlay Cast Stone Limited | Manufacturing | 2020 |
| Newlay Concrete Limited | Manufacturing | 2008 |
| Newlay Property Group Limited | Real estate | 2025 |
| Newlay Readymix Group Limited | Financial services | 2017 |
| Newlay Readymix Limited | Manufacturing | 2013 |
| News Gallery Convenience Ltd | Wholesale & retail | 2019 |
| Newsome Groundcare Limited | Administrative & support | 2017 |
| Nexbuy Traders Limited | Wholesale & retail | 2025 |
| Nexicode Ltd | Information & communication | 2024 |
| Nexo Couriers UK Ltd | Transport & logistics | 2025 |
| Nexoth Ltd | Wholesale & retail | 2026 |
| Next Step Fitness CIC | Education | 2026 |
| Nextstep Express Services Ltd | Transport & logistics | 2025 |
| Nexus Assist Limited | Other services | 2015 |
| Nexus Haulage Ltd | Transport & logistics | 2025 |
| Nexus Storage & Distribution Ltd | Transport & logistics | 2025 |
| Neyen Ltd | Health & social care | 2011 |
| Nibble N Nash Ltd | Hospitality | 2025 |
| Niche Odoris London Limited | Wholesale & retail | 2024 |
| Night Dream Beds Limited | Wholesale & retail | 2020 |
| Niko Supplier Ltd | Wholesale & retail | 2019 |
| Nimra Properties Limited | Administrative & support | 2006 |
| Nisaa Investments Ltd | Real estate | 2025 |
| Nisar Medical Ltd | Health & social care | 2025 |
| Njjw Group Ltd | Financial services | 2025 |
| NK Optical Limited | Health & social care | 2012 |
| Nkbnjl Limited | Wholesale & retail | 2022 |