| Nona Tech Services Limited | Professional & scientific | 2025 |
| Nonmech Ltd | Construction | 2016 |
| Nonna Agela Ltd | Hospitality | 2024 |
| Noratel UK Ltd | Wholesale & retail | 2001 |
| Norbury Park Farm Cheese Co Ltd | Manufacturing | 2009 |
| Nordiska Ltd | Wholesale & retail | 2023 |
| Nore Brook Developments Ltd | Construction | 2021 |
| Noremac Heating Ltd | Construction | 2025 |
| Normandy Community Therapy Garden | Education | 1998 |
| Normandy MOT Centre Ltd | Wholesale & retail | 2026 |
| Normandy Partners Limited | Administrative & support | 2023 |
| Normandy Ventures Limited | Construction | 2020 |
| North and South House (Albury Road) Freehold Company Limited | Households | 2013 |
| North Camp Barbers Limited | Other services | 2024 |
| North Camp Clean UP Rangers C.I.C. | Administrative & support | 2025 |
| North Downs Housing Limited | Real estate | 2016 |
| North Downs Picture Agency Limited | Professional & scientific | 2010 |
| North Face Consulting Ltd | Professional & scientific | 2019 |
| North Wales Investments (UK) Limited | Real estate | 2003 |
| North West Podiatry Limited | Health & social care | 2011 |
| Northcote Family Investment Company | Financial services | 2015 |
| Northcote Wealth Management Limited | Financial services | 2023 |
| Northdene (Guildford) Residents Association Limited | Households | 2001 |
| Northdownspestcontrol Ltd | Agriculture & fishing | 2018 |
| Northern Musical Theatre Orchestra Limited | Arts & recreation | 2020 |
| Northgate Plastering Ltd | Construction | 2013 |
| Northleigh Management Company Limited | Real estate | 1991 |
| Northright Properties Ltd | Real estate | 2020 |
| Northwest Bunoodles Ltd | Wholesale & retail | 2020 |
| Northwood (Woking) Ltd | Real estate | 2016 |
| Norvex Technology Ltd | Information & communication | 2024 |
| NOT OUT Cricket Ltd | Education | 2022 |
| NOT Rocket Science Ltd | Information & communication | 2024 |
| Notreemedia Limited | Information & communication | 2018 |
| Noush & Co Limited | Professional & scientific | 2015 |
| Nouveau Niche Games Ltd | Information & communication | 2020 |
| Nova ( Latchmere ) Limited | Construction | 2024 |
| Nova Properties Limited | Real estate | 1987 |
| Novalion Ltd | Information & communication | 2026 |
| Novamind Strategies Ltd | Professional & scientific | 2025 |
| Novapet UK Limited | Wholesale & retail | 2025 |
| Novarda Ltd | Real estate | 2026 |
| Novaventure Limited | Health & social care | 2021 |
| Novavia Ltd | Professional & scientific | 2024 |
| Novitas Consulting Ltd | Professional & scientific | 2009 |
| Novocast Building Solutions Ltd | Construction | 2025 |
| Novocure UK Limited | Professional & scientific | 2021 |
| Novus BH Magister Ltd | Wholesale & retail | 2016 |
| NPM Label Ltd | Information & communication | 2019 |
| NPR Legal Limited | Professional & scientific | 2026 |
| NPW Consulting Services Ltd | Financial services | 2025 |
| Nraas Retail Ltd | Wholesale & retail | 2023 |
| NT Consultancy Services Limited | Professional & scientific | 2024 |
| Ntegra Limited | Information & communication | 2003 |
| Ntrpf | Financial services | 2020 |
| NU Mind Wellness Ltd | Manufacturing | 2020 |
| NU Vagor EKO United Kingdom Limited | Wholesale & retail | 2025 |
| Number Twenty Two Ltd | Real estate | 2023 |
| Numbertitle Property Management Limited | Households | 1997 |
| Numldn Ltd | Other services | 2025 |
| Nuommy Limited | Other services | 2011 |
| Nurturing Nature CIC | Health & social care | 2025 |
| Nusun Energy Limited | Extraterritorial | 2004 |
| Nutrifigs Ltd | Wholesale & retail | 2024 |
| Nutrition Lifestyle Limited | Health & social care | 2003 |
| Nutrivival Ltd | Health & social care | 2020 |
| Nutting Investments Limited | Professional & scientific | 2006 |
| Nuvantis Scientific Ltd | Information & communication | 2025 |
| NW Lofts Limited | Construction | 2020 |
| NWF Conservation Community Interest Company | Professional & scientific | 2021 |
| NX STP Ltd | Professional & scientific | 2023 |
| Nyman Resourcing Limited | Administrative & support | 2007 |
| NYN Care Ltd | Professional & scientific | 2023 |
| O&D Project Solutions Limited | Professional & scientific | 2016 |
| O.V. Project Ltd | Construction | 2022 |
| Oak ARC Dwellings Ltd | Real estate | 2025 |
| Oak Leaf Residents Association Limited | Households | 2008 |
| Oak Tree Life Coaching Ltd | Professional & scientific | 2025 |
| Oakdene Place Management Company Limited | Real estate | 2002 |
| Oaken Property Management Ltd | Real estate | 2025 |
| Oakgate Ltd | Professional & scientific | 2015 |
| Oakhurst (Guildford) Limited | Households | 2007 |
| Oakian Arena Ltd | Wholesale & retail | 2026 |
| Oakleaf Enterprise Trading Limited | Extraterritorial | 2016 |
| Oakleaf Financial Ltd | Financial services | 2016 |
| Oakshade Management Company Limited | Households | 2017 |
| Oakstone Investments Limited | Financial services | 2025 |
| Oakwood Cranleigh Limited | Professional & scientific | 2004 |
| Oasis Preschool Ltd | Health & social care | 2013 |
| OB Support Services Limited | Agriculture & fishing | 2007 |
| Obelisk Investments Limited | Real estate | 2016 |
| Obimax Limited | Wholesale & retail | 2025 |
| Obsessions of Weybridge Limited | Wholesale & retail | 2009 |
| Obsidian Marketing Ltd | Administrative & support | 2019 |
| Obsidian R&C Limited | Professional & scientific | 2026 |
| Ocean Freight Consultants UK Limited | Transport & logistics | 2024 |
| Ocean Mediart Ltd | Wholesale & retail | 2023 |
| Oceantive Ltd | Professional & scientific | 2024 |
| Ockford Water Ltd | Construction | 2016 |
| Octave Resolution Group Limited | Professional & scientific | 2024 |