| My Accounts Office Limited | Professional & scientific | 2014 |
| My Big Ltd | Professional & scientific | 2026 |
| My Choice Homes Limited | Construction | 2014 |
| My Coffee and Company (Cheltenham) Limited | Hospitality | 2014 |
| My Coffee Limited | Hospitality | 2014 |
| My Emporium Junction Ltd | Professional & scientific | 2024 |
| My Fortress Ltd | Administrative & support | 2021 |
| My Health Platform Ltd | Public administration | 2023 |
| My Home Heating Ltd | Construction | 2018 |
| My Living Place Limited | Real estate | 2015 |
| My New Developments Limited | Professional & scientific | 2023 |
| My Pastalicious Ltd | Hospitality | 2019 |
| My Placebo Limited | Professional & scientific | 2014 |
| My Property Greece Limited | Professional & scientific | 2007 |
| My Reliable Recipes Ltd | Information & communication | 2025 |
| My Shire Houses Ltd | Manufacturing | 2012 |
| My Shire Retreats Ltd | Real estate | 2024 |
| My Town Rocks Ltd | Information & communication | 2018 |
| My True Nature Ltd | Health & social care | 2022 |
| My VET 24-7 #3 Limited | Professional & scientific | 2024 |
| Myconutri Limited | Manufacturing | 2008 |
| Myna Accountants Limited | Professional & scientific | 2021 |
| Mynuas Limited | Wholesale & retail | 2025 |
| Mynyyd Uchaf & Penllerfedwen Limited | Real estate | 2025 |
| Myob Consulting Limited | Administrative & support | 2022 |
| Myomancy Limited | Administrative & support | 2015 |
| Myplants App Ltd | Information & communication | 2026 |
| Myra IT Services Centre Ltd | Information & communication | 2019 |
| Mysticasset Ltd | Financial services | 2023 |
| Mythos & Gyros Ltd | Hospitality | 2025 |
| Mytime Capital Ltd | Professional & scientific | 2020 |
| Myton | Financial services | 2020 |
| Myworksapp Ltd | Information & communication | 2019 |
| Mzini Capital Ltd | Transport & logistics | 2023 |
| N & I Hughes Ltd | Information & communication | 2019 |
| N C S Transport Limited | Transport & logistics | 2018 |
| N Gavriel Holdings Ltd | Real estate | 2017 |
| N K Advisors Ltd | Health & social care | 2021 |
| N M L Autobody's Ltd | Transport & logistics | 2003 |
| N S Builders Limited | Construction | 2005 |
| N-Aud Ltd | Professional & scientific | 2025 |
| N. P. Marlow Associates Limited | Professional & scientific | 2003 |
| N.J. Hughes (Haulage) Limited | Transport & logistics | 1964 |
| N.Y.S Logix Ltd | Transport & logistics | 2026 |
| N89 Limited | Real estate | 2024 |
| Nacton Solar Farm Limited | Energy | 2022 |
| Nadia Shahanaz Ltd | Professional & scientific | 2021 |
| Nahar Transport Limited | Professional & scientific | 2025 |
| Naight Consulting Ltd | Professional & scientific | 2026 |
| Nail Art GL54 Ltd | Other services | 2026 |
| Nailrock Ltd | Arts & recreation | 2024 |
| Nakamoto Partners Ltd | Information & communication | 2025 |
| Naly Food Centre Limited | Wholesale & retail | 2025 |
| Namale Capital Limited | Professional & scientific | 2021 |
| Namale Investments Limited | Real estate | 2021 |
| Namaqua Limited | Administrative & support | 2016 |
| Namaste Hair Limited | Extraterritorial | 2021 |
| Namaste Jewellery Limited | Extraterritorial | 2021 |
| Namaste Lifestyle Group Limited | Wholesale & retail | 2015 |
| Namaste Lifestyle Limited | Extraterritorial | 2017 |
| Namaste Organics Limited | Extraterritorial | 2010 |
| Namaste Spa Group Limited | Other services | 2021 |
| Namaste Spa Limited | Extraterritorial | 2014 |
| Nameco 112025 Limited | Administrative & support | 2011 |
| Nammo Cheltenham Ltd | Manufacturing | 2003 |
| Nank D Ltd | Real estate | 2026 |
| Nank Properties Limited | Real estate | 2022 |
| Nankb Properties Limited | Real estate | 2023 |
| Nantinee Thai Massage Ltd | Health & social care | 2025 |
| Naomi Health Limited | Health & social care | 2024 |
| Naomi Padbury Design Ltd | Professional & scientific | 2024 |
| Napier House Cheltenham Limited | Households | 1986 |
| Napier Service Centre Limited | Wholesale & retail | 2016 |
| Nara Tech Limited | Information & communication | 2010 |
| Narberth BAT House Ltd | Other services | 2023 |
| Naresh Patel Associates (NPA) Ltd | Other services | 2011 |
| Narraway and Sons Ltd | Professional & scientific | 2024 |
| Narvo Strategic Land Ltd | Professional & scientific | 2025 |
| Nasprias Ltd | Hospitality | 2018 |
| Natalie Bowden Art Limited | Wholesale & retail | 2020 |
| Natalya Ltd | Health & social care | 2022 |
| Natanzi Group Ltd | Real estate | 2022 |
| Natasha Russell Limited | Administrative & support | 2019 |
| Nathan King Estates Ltd | Real estate | 2022 |
| Nathans & Sons Properties Ltd | Real estate | 2024 |
| Nathe Household Services Ltd | Administrative & support | 2022 |
| National Boat Buyers Ltd | Wholesale & retail | 2022 |
| National Custom and Self Build Association CIC | Other services | 2011 |
| National Holidays Holdings Limited | Administrative & support | 2020 |
| National Retrofit Solutions Limited | Professional & scientific | 2020 |
| Nationwide Agricultural Drone Services Ltd | Agriculture & fishing | 2023 |
| Nationwide Association of Fostering Providers | Health & social care | 2008 |
| Nationwide Express Services Ltd | Transport & logistics | 2022 |
| Nativa Learning Ltd | Other services | 2021 |
| Natural Mart Ltd | Wholesale & retail | 2014 |
| Natural Organics Ltd | Extraterritorial | 2014 |
| Natural White Limited | Health & social care | 2020 |
| Naturewatch | Other services | 1991 |
| Naturewatch Foundation | Other services | 1994 |
| NAU Arts Limited | Arts & recreation | 2017 |