| Mxlc (Holdings) Ltd | Financial services | 2024 |
| MXW Technologies Ltd | Information & communication | 2019 |
| My Caring VET Limited | Professional & scientific | 2023 |
| My Empire 888 Limited | Other services | 2025 |
| My Foods Ltd | Wholesale & retail | 2007 |
| My House to Your Home Ltd | Real estate | 2025 |
| My Meno Ltd | Health & social care | 2022 |
| My Thai @ the Old Steps Limited | Hospitality | 2015 |
| My Thai Central Bradford Ltd | Hospitality | 2016 |
| My Thai Keighley Road Ltd | Hospitality | 2016 |
| My Thai Leeds Ltd. | Hospitality | 2014 |
| My Thai Northern Quarter Ltd | Hospitality | 2016 |
| My Thai Piccadilly Ltd | Hospitality | 2024 |
| My Thai ST James Square Ltd | Hospitality | 2016 |
| My Thai Water Lane Ltd | Hospitality | 2023 |
| My Thai Wilmslow Ltd | Hospitality | 2023 |
| Myco Search Ltd | Wholesale & retail | 2025 |
| Mycomfysofa Ltd | Manufacturing | 2025 |
| Mydlowski Property Management Ltd | Real estate | 2025 |
| Myford Limited | Manufacturing | 2011 |
| MYK Group Ltd | Administrative & support | 2025 |
| Mykonos on the Dales Limited | Hospitality | 2018 |
| Mypropertyapp Ltd | Information & communication | 2015 |
| Myreka Ltd | Information & communication | 2014 |
| Mystic Brows Ltd | Other services | 2015 |
| Mystical and Magical Ltd | Wholesale & retail | 2005 |
| Mytholmroyd Builders Merchants Limited | Wholesale & retail | 2007 |
| Mytholmroyd Chinese Takeaway Limited | Hospitality | 2024 |
| Mzpharm Limited | Health & social care | 2021 |
| N a W Consulting Services Ltd | Construction | 2014 |
| N H Properties Yorkshire Ltd | Real estate | 2025 |
| N Pickles Ltd | Health & social care | 2021 |
| N R B Building Services Limited | Construction | 2004 |
| N S L Data Limited | Information & communication | 2000 |
| N Waddington Limited | Construction | 2015 |
| N&D Property Services Limited | Real estate | 2018 |
| N&Dh Limited | Health & social care | 2014 |
| N&P Content Limited | Information & communication | 2010 |
| N&R Jetset Ltd | Administrative & support | 2023 |
| N&Z Associates Limited | Wholesale & retail | 2010 |
| N.A.T Property Holdings Ltd | Real estate | 2025 |
| N.U.K.E. Exports Limited | Wholesale & retail | 1976 |
| NA Advisory Limited | Professional & scientific | 2024 |
| NA Property and Development Ltd | Real estate | 2025 |
| Nabc Limited | Administrative & support | 2013 |
| Nabco Services Limited | Professional & scientific | 2021 |
| Nabobz Limited | Wholesale & retail | 2014 |
| NAD Transport Ltd | Transport & logistics | 2018 |
| Nadeem Limited | Wholesale & retail | 2024 |
| Nadit Ltd | Wholesale & retail | 2023 |
| Nagual Labs Ltd | Information & communication | 2025 |
| Nailed IT Property Solutions and Maintenance Services Ltd | Construction | 2025 |
| Nails to YOU Ltd | Other services | 2019 |
| Nakash Ltd | Health & social care | 2015 |
| Naked APE Ltd | Hospitality | 2023 |
| Naldine Ltd | Health & social care | 2019 |
| Namarie Limited | Financial services | 2012 |
| Nanas Social Dining Ltd | Wholesale & retail | 2024 |
| Naomi Green ISW Ltd | Administrative & support | 2015 |
| NAS Delivery Ltd | Transport & logistics | 2026 |
| Nasir Health Ltd | Health & social care | 2025 |
| Nasir Optical Ltd | Health & social care | 2023 |
| Natalie Glorney Consulting Limited | Professional & scientific | 2024 |
| Nathan Chapman Limited | Construction | 2007 |
| Nation Car Group Ltd | Wholesale & retail | 2025 |
| Nation Finance Ltd | Wholesale & retail | 2024 |
| National Gilbert & Sullivan Opera Company | Arts & recreation | 2014 |
| National Reactive Limited | Construction | 2018 |
| National Reactive Projects Limited | Construction | 2022 |
| National Retaining Solutions (SW) Ltd | Construction | 2025 |
| National Rewires Ltd | Construction | 2025 |
| Nationwide Commercial Cleaning Services Ltd | Administrative & support | 2026 |
| Nationwide Door Systems Ltd | Manufacturing | 2011 |
| Nationwide Estates Ltd | Real estate | 2022 |
| Nationwide Experts Ltd | Professional & scientific | 2017 |
| Nationwide Housing Solutions Ltd | Households | 2022 |
| Nativ Metaverse Ltd | Information & communication | 2022 |
| Natthai Ltd | Hospitality | 2022 |
| Natura Leisure Limited | Administrative & support | 2021 |
| NAV 20/20 Ltd | Health & social care | 2015 |
| Naya Healthcare Ltd | Health & social care | 2024 |
| NAZ Advisors Limited | Professional & scientific | 2024 |
| Naza Fitness Ltd | Wholesale & retail | 2016 |
| Nazar Investments Ltd | Real estate | 2019 |
| NB Advisory Ltd | Professional & scientific | 2024 |
| NCC Property Ltd | Real estate | 2018 |
| NE Consult Limited | Professional & scientific | 2012 |
| Nee’S Aesthetics Ltd | Other services | 2021 |
| Neighbourhood Furniture Community Interest Company | Manufacturing | 2024 |
| Neil Davis Consultancy Ltd | Other services | 2017 |
| Neil Foster Ltd | Manufacturing | 2014 |
| Neil Senior Photography Ltd | Professional & scientific | 2012 |
| Nellyco Ltd | Real estate | 2023 |
| Nelson Optical Limited | Health & social care | 2024 |
| Neon Brown Ltd | Other services | 2026 |
| Nesarts Limited | Wholesale & retail | 2024 |
| Nest & Nook Properties Ltd | Real estate | 2026 |
| Netball Nights Leeds Limited | Arts & recreation | 2015 |
| Netball Nights Limited | Arts & recreation | 2012 |
| Nethertown Developments Limited | Construction | 2020 |