| My Heating Ltd | Construction | 2018 |
| My HQ Cheshire Ltd | Financial services | 2021 |
| My Life Services Ltd | Professional & scientific | 2021 |
| My Luxe Life Ltd | Wholesale & retail | 2026 |
| My Pasta Limited | Hospitality | 2024 |
| My Pharma Direct Limited | Health & social care | 2024 |
| My Planning Consultant Ltd | Information & communication | 2026 |
| My Three Cats Limited | Other services | 2023 |
| My Time Property Investments Limited | Real estate | 2024 |
| My Tranquil Space Limited | Real estate | 2024 |
| My Truenorth Ltd | Administrative & support | 2007 |
| My UNI Life Ltd | Professional & scientific | 2021 |
| Myacc Ltd | Information & communication | 2020 |
| MYB IT Services Ltd | Administrative & support | 2024 |
| MYB Services Limited | Administrative & support | 2007 |
| Mydiro Consultants Ltd | Professional & scientific | 2023 |
| Mygolfholidaysdotcom Limited | Administrative & support | 2020 |
| MYM Ventures Limited | Administrative & support | 2025 |
| Mypad Lettings Group Ltd | Real estate | 2026 |
| Mypod Conversions Limited | Construction | 2022 |
| Myriad Training and Consulting Limited | Education | 2003 |
| Myrtus Engineering LAB Ltd | Professional & scientific | 2026 |
| MYS Technology Limited | Information & communication | 2019 |
| MYSPACE2TALK Counselling Ltd | Health & social care | 2021 |
| Mywatersource UK Limited | Professional & scientific | 2024 |
| Ménage Training Academy Ltd | Arts & recreation | 2025 |
| M’S Shop WA4 Ltd | Wholesale & retail | 2026 |
| N & G Business Consultancy and Market Research Services Ltd | Information & communication | 2017 |
| N & R Pubs Ltd | Hospitality | 2019 |
| N a Sharp Automation Limited | Other services | 2006 |
| N and K Foods Limited | Wholesale & retail | 2004 |
| N C K Beauty Ltd | Other services | 2025 |
| N E -Bet.Com Limited | Arts & recreation | 2018 |
| N E Landscapes (NW) Ltd | Administrative & support | 2019 |
| N Engr Limited | Professional & scientific | 2022 |
| N Gardner Services Limited | Professional & scientific | 2018 |
| N J K Computer Services Ltd. | Information & communication | 2011 |
| N J Power Limited | Financial services | 2012 |
| N J Rogers Limited | Other services | 2011 |
| N J S Storage Limited | Administrative & support | 2009 |
| N M Duckworth Limited | Other services | 2016 |
| N Maguire Engineering Limited | Professional & scientific | 2019 |
| N Newton Ltd | Professional & scientific | 2026 |
| N Y K Mirror Doors Limited | Construction | 2004 |
| N&E Lodges Limited | Hospitality | 2025 |
| N&H Signature Developments Ltd | Construction | 2026 |
| N&L Holman Consulting Limited | Professional & scientific | 2018 |
| N'Genius Materials Limited | Professional & scientific | 2021 |
| N'Genius Materials Technology Limited | Professional & scientific | 1992 |
| N-Zo Services Ltd | Wholesale & retail | 2023 |
| N.A. Software Limited | Information & communication | 1978 |
| N.B Trans Ltd | Transport & logistics | 2020 |
| N.G.Bosson Designs Ltd | Administrative & support | 2025 |
| N.O.S. Offshore Services Limited | Professional & scientific | 2026 |
| N.T.Rumble CAD Ltd | Administrative & support | 2024 |
| N19 Limited | Information & communication | 2016 |
| N3AM Limited | Real estate | 2018 |
| NA FOX Limited | Professional & scientific | 2021 |
| Nabla One Ltd | Administrative & support | 2026 |
| Nads Corporations Limited | Administrative & support | 2023 |
| Naeem Sheikh Consulting Limited | Professional & scientific | 2014 |
| Naffi (UK) Limited | Professional & scientific | 2018 |
| Nagasaki Limited | Professional & scientific | 2023 |
| Nahar Ltd | Wholesale & retail | 2025 |
| Naik's Retail Consultancy Ltd | Other services | 2020 |
| Nail IT (NW) Limited | Professional & scientific | 2014 |
| Nail Tech Secrets Ltd | Other services | 2022 |
| Naim Bazaar Ltd | Wholesale & retail | 2025 |
| Naja Business Services Limited | Other services | 2017 |
| Naked Academy Limited | Education | 2020 |
| Naked B Holdings Limited | Education | 2020 |
| Naked Beauty Studio Limited | Education | 2017 |
| NAL Energy Ltd | Information & communication | 2026 |
| Nalagmp Ltd | Administrative & support | 2024 |
| Naltec Limited | Administrative & support | 2009 |
| Nammuni Consulting Ltd | Administrative & support | 2014 |
| Namtab Management Limited | Extraterritorial | 2018 |
| Nanda Consultancy Services Limited | Administrative & support | 2010 |
| Nandini Residentials Ltd | Real estate | 2021 |
| Nandri Limited | Administrative & support | 2021 |
| Nanjvet Consulting Ltd | Professional & scientific | 2021 |
| Nano Systems (UK) Limited | Professional & scientific | 2006 |
| NANO1 Ltd | Wholesale & retail | 2016 |
| Nanoshark Ltd | Information & communication | 2018 |
| Nanotesla DX Limited | Manufacturing | 2022 |
| Nanotherics Ltd | Manufacturing | 2007 |
| Nanotherics Management Limited | Professional & scientific | 2020 |
| Napier Management Holdings Ltd | Professional & scientific | 2016 |
| Napier Management Limited | Construction | 2001 |
| Napier Special Projects Limited | Real estate | 2016 |
| Nardis Engineering Limited | Professional & scientific | 2025 |
| Naresh Jakhu Limited | Administrative & support | 2014 |
| Narit Limited | Professional & scientific | 2017 |
| Narmis Consulting Limited | Administrative & support | 2015 |
| Narrative Purpose Ltd. | Professional & scientific | 2018 |
| NAS Barber Ltd | Other services | 2025 |
| Nascent Design Limited | Administrative & support | 2014 |
| Nash Home Builders Ltd | Construction | 2024 |
| Nash Photonics Limited | Professional & scientific | 2018 |
| Nashboard Solutions Ltd | Administrative & support | 2025 |