| NR M Logistics Ltd | Transport & logistics | 2026 |
| NRD Estates Ltd | Real estate | 2026 |
| NRF Financial Limited | Financial services | 2021 |
| NRJ Associates Ltd | Administrative & support | 2016 |
| NRJ Trading Inc Ltd | Wholesale & retail | 2026 |
| NRK Limited | Wholesale & retail | 2019 |
| Nrkp Ltd | Real estate | 2021 |
| NS Elite Auto Ltd | Wholesale & retail | 2025 |
| NS Flooring Solutions Limited | Construction | 2022 |
| NS Rooted Solutions Limited | Real estate | 2025 |
| NS Superstore Limited | Wholesale & retail | 2022 |
| NS113 Limited | Real estate | 2023 |
| NSC Electrics Limited | Manufacturing | 2013 |
| Nsdb Flooring Limited | Construction | 2012 |
| Nses Properties Limited | Real estate | 2023 |
| NSH Trade Ltd | Wholesale & retail | 2025 |
| NSM Consultancy Ltd | Professional & scientific | 2020 |
| NSO Rentals Limited | Real estate | 2025 |
| NSP Joiners Limited | Manufacturing | 2021 |
| NSR Caterers Limited | Hospitality | 2025 |
| NSS Investment & Consultancy Ltd | Real estate | 2025 |
| NST Aesthetics Ltd | Health & social care | 2024 |
| NT Group Ltd | Wholesale & retail | 2024 |
| NTD Films Limited | Information & communication | 2025 |
| NTJ Logistics Ltd | Other services | 2016 |
| Ntnc Services Limited | Transport & logistics | 2023 |
| NU Stiu Ltd | Transport & logistics | 2024 |
| Nu-Bite Limited | Extraterritorial | 2021 |
| Nu-Insight Limited | Education | 2025 |
| Nuba Nutrition Limited | Manufacturing | 2015 |
| Nubrex Limited | Manufacturing | 1988 |
| Nuclear Engineering (Holdings) Limited | Professional & scientific | 2003 |
| Nuclear Engineering Group Limited | Professional & scientific | 2009 |
| Nuco Group Limited | Construction | 2020 |
| Nuco Property Limited | Real estate | 2023 |
| Nude Laser and Beauty Limited | Professional & scientific | 2024 |
| Nudenza Ltd | Wholesale & retail | 2026 |
| Nufan Investments Limited | Wholesale & retail | 2025 |
| Nufora Company Limited | Professional & scientific | 2011 |
| Number Seven Boutique Albrighton Ltd | Wholesale & retail | 2025 |
| Numero Jeden Limited | Manufacturing | 2020 |
| Numfolphah Ltd | Transport & logistics | 2019 |
| NUR Consultancy Ltd | Education | 2015 |
| Nurpur Transport Limited | Professional & scientific | 2025 |
| Nurton Hall Farm Limited | Agriculture & fishing | 2010 |
| Nurton Hill Limited | Extraterritorial | 2014 |
| Nurture Care Group Holdings Ltd | Financial services | 2022 |
| Nurture Futures Ltd | Health & social care | 2025 |
| Nurture Media Limited | Professional & scientific | 2020 |
| Nurturing Haven Limited | Health & social care | 2023 |
| Nurturing Homes Limited | Health & social care | 2024 |
| Nutritive Smoothies Limited | Hospitality | 2023 |
| Nuvairo Ltd | Wholesale & retail | 2026 |
| Nuvra Solutions Ltd. | Wholesale & retail | 2024 |
| Nuwave Studios Ltd | Information & communication | 2025 |
| Nuxtron Ltd | Information & communication | 2026 |
| NW Property Installations Limited | Construction | 2023 |
| NW Takeaway Ltd | Hospitality | 2024 |
| Nwit Ltd | Wholesale & retail | 2023 |
| NWS Marine Limited | Other services | 2015 |
| Nxgn Services Ltd | Construction | 2025 |
| NXT Pathway CIC | Education | 2026 |
| Nyan Co Ltd | Construction | 2016 |
| Nyaradzo Mukuru Marketing Services Private Limited | Administrative & support | 2020 |
| Nyaradzo Mukuru Services Private Limited | Professional & scientific | 2008 |
| Nyarwebby Care Limited | Health & social care | 2017 |
| Nyaz Limited | Wholesale & retail | 2024 |
| NYC Writers Ltd | Information & communication | 2023 |
| Nyda Ltd | Wholesale & retail | 2022 |
| Nzdhillon Limited | Transport & logistics | 2025 |
| Nzkaur Limited | Information & communication | 2025 |
| O Jogo 90 Ltd | Information & communication | 2025 |
| O R Trade Solutions Ltd | Manufacturing | 2025 |
| O&M Hold Co Ltd | Financial services | 2026 |
| O'Brien's Health Limited | Wholesale & retail | 2023 |
| O'Regan Motors Limited | Wholesale & retail | 2021 |
| O'Rourke Group Holdings Limited | Professional & scientific | 2019 |
| O'Twadhi - T/A Pendrell Arms Limited | Hospitality | 2018 |
| O.S.S. Car Sales Limited | Wholesale & retail | 2007 |
| O2 Properties Limited | Real estate | 2016 |
| O2SUPPORT Ltd | Information & communication | 2025 |
| OAI Properties Limited | Real estate | 2023 |
| Oak & Home Traditional Building Limited | Construction | 2016 |
| Oak Amusements Limited | Arts & recreation | 1982 |
| Oak Consultancy Ltd | Real estate | 2025 |
| Oak Park Property Services Limited | Construction | 2021 |
| Oakdale Social Club Ltd | Other services | 2005 |
| Oaken Manor Farm Limited | Households | 1997 |
| Oakendale Investments Limited | Other services | 1980 |
| Oakitu Ltd | Professional & scientific | 2021 |
| Oaklands Road Flats Residents Association Limited | Households | 1983 |
| Oakleaf Gardens Management Ltd | Extraterritorial | 2014 |
| Oaktree Management Services Ltd | Other services | 2023 |
| Oaktree Property Services Ltd | Real estate | 2018 |
| Oaktrees Healthcare (Finchfield) Limited | Financial services | 2014 |
| Oakwood Health (UK) Ltd | Administrative & support | 2023 |
| Oandy Shortlet Limited | Real estate | 2023 |
| Oanights Limited | Real estate | 2025 |
| Oasis Cafe Delivery Ltd | Hospitality | 2024 |
| Oasis Cafe Wolverhamton Ltd | Hospitality | 2022 |