| My Communication Box Limited | Health & social care | 2018 |
| My Perfect Properties Limited | Real estate | 2022 |
| My Project Manager Limited | Professional & scientific | 2012 |
| My Squirrel Guard Limited | Other services | 2017 |
| My Sweet Storm Ltd | Manufacturing | 2023 |
| My Teeth Limited | Health & social care | 2021 |
| Mycelium Search LLP | | 2025 |
| Myfav Ltd | Information & communication | 2017 |
| Mygd Properties Ltd | Real estate | 2023 |
| Myintelligent Products Ltd | Wholesale & retail | 2023 |
| MYJ Consultants UK Limited | Administrative & support | 2011 |
| Mymedia-Uk Limited | Manufacturing | 2003 |
| Myra Homes Management Limited | Households | 2023 |
| Myriad Property Management Limited | Real estate | 2005 |
| MYS Global Ltd | Wholesale & retail | 2022 |
| Mystikal ZEN Ltd | Wholesale & retail | 2025 |
| Mytidis & Dokos Ltd | Hospitality | 2019 |
| Mytidis and Sons Ltd | Hospitality | 2017 |
| Mytradeselect Ltd | Information & communication | 2026 |
| MYW Property Limited | Real estate | 2016 |
| MZN Properties Ltd | Households | 2020 |
| N & L Sheth Investments Limited | Real estate | 2017 |
| N & R Builders Ltd | Construction | 2022 |
| N & S Foods Limited | Hospitality | 2020 |
| N Chauhan Property Investments Limited | Real estate | 2017 |
| N Hair Style Ltd | Other services | 2023 |
| N M Dental Care Limited | Health & social care | 2013 |
| N Maxted Limited | Professional & scientific | 2026 |
| N Patel Management Ltd | Health & social care | 2012 |
| N T Y Ecospark Limited | Administrative & support | 2026 |
| N Vachanelidou Limited | Other services | 2018 |
| N&G Restore Ltd | Construction | 2019 |
| N&J Optics Limited | Health & social care | 2024 |
| N&N DRY Cleaning & Alteration Ltd | Other services | 2026 |
| N&N Investments Ltd | Real estate | 2024 |
| N&S Industries Limited | Construction | 2026 |
| N. V. Builders Ponder Street Flat Management Ltd | Real estate | 2014 |
| N.C.C Fastlink Ltd | Transport & logistics | 2022 |
| N.I.M. Building Ltd | Construction | 2021 |
| N.Sheppard Limited | Health & social care | 2024 |
| N1TIN 5HAH Limited | Professional & scientific | 2022 |
| N4 Workout Ltd | Arts & recreation | 2013 |
| N46 International Limited | Professional & scientific | 2025 |
| N51 Rising Tides Ltd | Real estate | 2025 |
| N64 Limited | Other services | 2011 |
| N7 Cosmetics Limited | Wholesale & retail | 2024 |
| N8WORKOUT Ltd | Arts & recreation | 2026 |
| NA and Sons Ltd | Administrative & support | 2022 |
| Naashta Ltd | Wholesale & retail | 2021 |
| Naba Capital Limited | Real estate | 2023 |
| Nacha's Supplier Ltd | Manufacturing | 2021 |
| Nachas Limited | Real estate | 2007 |
| Nadia Kebab House Limited | Hospitality | 2015 |
| Nadir Marketing Limited | Information & communication | 2021 |
| Naeem & Sons Property Limited | Real estate | 2024 |
| Nailed by Moon Limited | Other services | 2021 |
| Naiwor Limited | Wholesale & retail | 2025 |
| Naiya's Craft Ltd | Manufacturing | 2025 |
| Najaf's Jewellery Repairs Ltd | Other services | 2023 |
| Najean Services Ltd | Real estate | 2018 |
| Najm Distributions Ltd | Wholesale & retail | 2026 |
| NAK Medical Limited | Health & social care | 2014 |
| Nakama Technologies Ltd | Information & communication | 2026 |
| Nakhs Business Solutions Limited | Real estate | 2011 |
| Namaste Builders Nepal Ltd | Construction | 2025 |
| Namaste London Ltd | Wholesale & retail | 2025 |
| Nambert Limited | Financial services | 1977 |
| Nampara Holdings Ltd | Real estate | 2021 |
| Nancy Nails Ltd | Other services | 2024 |
| Naneltrans Ltd | Transport & logistics | 2016 |
| Nanologik Ltd | Administrative & support | 2019 |
| Nanua and SON Investments Limited | Real estate | 2021 |
| Naomi Bass OT Ltd | Health & social care | 2024 |
| Napason Limited | Wholesale & retail | 1995 |
| Napmap Ltd | Manufacturing | 2023 |
| Nappolitana Pizzeria Ltd | Hospitality | 2025 |
| NAR Investment Limited | Professional & scientific | 2014 |
| Naran Jesha & Sons (U.K.) Limited | Professional & scientific | 1988 |
| Narcos Cladding Ltd | Construction | 2020 |
| Nard Ltd | Administrative & support | 2019 |
| Narmadas Lounge Ltd | Hospitality | 2026 |
| Narr Holdings Limited | Financial services | 2020 |
| Narthex Limited | Administrative & support | 2016 |
| Narya SVP K Ltd | Real estate | 2022 |
| Nasara Employment Limited | Education | 2025 |
| Nasb Houses Limited | Real estate | 2025 |
| Nasb Limited | Wholesale & retail | 2024 |
| Nasb Property Limited | Real estate | 2022 |
| Nasn Ltd | Professional & scientific | 2019 |
| Nasscorp Limited | Information & communication | 2010 |
| Nassouri Capital Ltd | Financial services | 2026 |
| Nassouri Partners Ltd | Financial services | 2026 |
| Natalie Leiwy Architects Limited | Professional & scientific | 2012 |
| Natalie O'Connor Design Limited | Arts & recreation | 2015 |
| Natasha Luthra Limited | Health & social care | 2010 |
| Nathan House (Freehold) Limited | Households | 2004 |
| Nathan House (Trustees) Limited | Households | 2004 |
| Nati Superior Pro Limited | Administrative & support | 2026 |
| National Claims Limited | Professional & scientific | 2025 |
| National Parcel Service Ltd | Transport & logistics | 2024 |