| Ningbo Druck Machinery Co., Limited | Wholesale & retail | 2023 |
| Ningbo Hana Garment Co., Ltd | Extraterritorial | 2014 |
| Ningbo Hoolen Co., Ltd. | Extraterritorial | 2015 |
| Ningbo Qida International Trading Co., Ltd | Wholesale & retail | 2025 |
| Ningbo Sy-Toys Co., Ltd | Extraterritorial | 2015 |
| Ningbo Winfirst Industrial Co., Limited | Manufacturing | 2022 |
| Nishine International Limited | Wholesale & retail | 2025 |
| Nivasie Ltd | Real estate | 2024 |
| NJA Inns Ltd | Hospitality | 2026 |
| NJB Distributions Ltd | Wholesale & retail | 2026 |
| NJF Brickwork Limited | Construction | 2017 |
| NJP Interiors Ltd | Construction | 2023 |
| NJS Waste Brokerage Limited | Water & waste | 2022 |
| NKB Developments Ltd | Construction | 2012 |
| NKJ Automotive Group Ltd | Wholesale & retail | 2025 |
| NKW Limited | Financial services | 2018 |
| NO Boundaries Cricket Club CIC | Education | 2022 |
| NO.1 Lawn Road Property Management (2010) Limited | Real estate | 2010 |
| Noema IP Ltd | Professional & scientific | 2026 |
| Noesis Estates Ltd | Real estate | 2025 |
| Noesis Research Ltd | Professional & scientific | 2026 |
| Noka Future Ltd | Administrative & support | 2022 |
| Noko Marine Ltd | Wholesale & retail | 2025 |
| Nomadic Leisure Ltd | Manufacturing | 2021 |
| Noni's Properties Limited | Real estate | 2024 |
| Norbury Wharf Limited | Transport & logistics | 2004 |
| Norfin Automotive Ltd | Wholesale & retail | 2022 |
| Norse Miliff International Crop Nutrition Co., Ltd | Mining & quarrying | 2024 |
| North Media Co., Ltd | Information & communication | 2025 |
| North Midlands Neurosciences Limited | Health & social care | 2015 |
| North Shropshire Grass Track Car Club Limited | Arts & recreation | 1979 |
| Northcap Cyber Limited | Information & communication | 2021 |
| Northern Acquire Ltd | Real estate | 2021 |
| Northern Soul Coffee Limited | Professional & scientific | 2023 |
| Northgate Technology Limited | Wholesale & retail | 2025 |
| Norton Data Comms Limited | Information & communication | 2007 |
| Norton Premier Properties Ltd | Real estate | 2018 |
| Norton Property Cleaning Services Ltd | Administrative & support | 2018 |
| Norton Property Holdings Ltd | Real estate | 2016 |
| Norton Property Management Services Ltd | Real estate | 2014 |
| Norwell Lapley Productions Limited | Arts & recreation | 2002 |
| Nova Dynamics Trading Ltd | Wholesale & retail | 2025 |
| Novacle Ltd | Wholesale & retail | 2025 |
| Novalith Trade Limited | Wholesale & retail | 2026 |
| Novel Industry Co., Ltd. | Extraterritorial | 2015 |
| Novos (Norway) Biotechnology Co., Ltd | Manufacturing | 2023 |
| Novotex Services Ltd | Transport & logistics | 2026 |
| Novus Momentum Technology Co., Ltd | Information & communication | 2025 |
| Nowell Lettings Limited | Real estate | 2021 |
| Nowell Meller (Holdings) Limited | Financial services | 2021 |
| Nowell Meller Solicitors Limited | Professional & scientific | 2005 |
| NRB Driver Services Limited | Transport & logistics | 2020 |
| NRG Zero Ltd | Construction | 2023 |
| Nrjem Ltd | Transport & logistics | 2020 |
| NS Civils Limited | Construction | 2024 |
| Ntiele Service Trading Co., Ltd | Wholesale & retail | 2024 |
| NTP Property Ltd | Households | 2025 |
| NU Brite (Stafford) Limited | Administrative & support | 2004 |
| NU Brite Limited | Administrative & support | 2009 |
| Nudemusiq Limited | Arts & recreation | 2013 |
| Nuohua Tape Co., Ltd | Extraterritorial | 2015 |
| Nuora Ltd | Information & communication | 2026 |
| Nutmeg Audit & Accountancy Limited | Extraterritorial | 2023 |
| Nutmeg Audit Limited | Extraterritorial | 2023 |
| Nutmeg IT Limited | Extraterritorial | 2023 |
| NVS Treatments Limited | Other services | 2022 |
| NW 15 Ltd | Professional & scientific | 2024 |
| NW Chinese Food Ltd | Hospitality | 2025 |
| NYC Trading Co., Limited | Wholesale & retail | 2025 |
| NYK Enterprise Ltd | Wholesale & retail | 2022 |
| O I R I Ltd | Real estate | 2017 |
| O&B Property Ltd | Construction | 2020 |
| O'Brien & Morris Limited | Hospitality | 2016 |
| O'Neill M&C Limited | Extraterritorial | 2013 |
| OAJ Limited | Administrative & support | 2005 |
| Oakbarn Landscapes Limited | Administrative & support | 2018 |
| Oakbrook Close Residents Commonhold Association Limited | Households | 2013 |
| Oakedge Shooting Ground Limited | Arts & recreation | 2022 |
| Oakfield Residential Ltd | Real estate | 2024 |
| Oakfield Technical Services Ltd | Professional & scientific | 2019 |
| Oakholme Investments | Financial services | 2023 |
| Oaklands Boarding Kennels Ltd | Agriculture & fishing | 2013 |
| Oaklands Technology Ltd | Wholesale & retail | 2012 |
| Oakover Grange (14-19) RTM Company Limited | Households | 2019 |
| Oakover Grange (2-6) RTM Company Limited | Households | 2019 |
| Oakover Grange (7-12) RTM Company Limited | Households | 2019 |
| Oakover Grange Freeholders Limited | Households | 2021 |
| Obelisq Capital Ltd | Wholesale & retail | 2025 |
| Obsidian Holsteins Ltd | Agriculture & fishing | 2024 |
| Obso Holdings Ltd | Financial services | 2023 |
| Obso Ltd | Wholesale & retail | 2018 |
| Ocean Bridge Import and Export Co., Ltd | Wholesale & retail | 2024 |
| Ocean HQ Ltd | Hospitality | 2025 |
| Ocean Waves Data Limited | Information & communication | 2022 |
| OCS Staffs Limited | Professional & scientific | 2023 |
| Octagon Events Limited | Real estate | 2026 |
| OCTAGON21 Ltd | Wholesale & retail | 2022 |
| OEH Heavy Plant Solutions. Ltd | Manufacturing | 2025 |
| Oetker Worldwide Manage Limited | Manufacturing | 2022 |
| Officecom Limited | Information & communication | 2002 |