| Multihull World Brokerage Limited | Manufacturing | 1986 |
| My Casa Ltd | Real estate | 2022 |
| MYT Solutions Limited | Administrative & support | 2026 |
| N. Horrocks Limited | Construction | 2005 |
| N.C.I. Design Limited | Professional & scientific | 2005 |
| Naanovo Energy UK Ltd | Administrative & support | 2009 |
| Naked Fish Marketing Ltd | Professional & scientific | 2020 |
| Naked Fish Properties Ltd | Real estate | 2023 |
| Nero Integrated Services Ltd | Administrative & support | 2025 |
| New Build Estates Ltd | Real estate | 2025 |
| New Dawn Furniture Limited | Manufacturing | 2011 |
| New Heights Roofing Limited | Construction | 2026 |
| New Road Consultancy Limited | Professional & scientific | 2025 |
| NEX Consulting Ltd | Information & communication | 2003 |
| Next Legal Ltd | Information & communication | 2014 |
| Nick Jeffery Aeronautical Marine and Electrical Services Limited | Professional & scientific | 2020 |
| Nickden Property Limited | Administrative & support | 2011 |
| Nightingale Carpentry Services Ltd | Manufacturing | 2021 |
| Nischal Nisant Ltd | Real estate | 2023 |
| NK KF Beauty Limited | Other services | 2025 |
| Nmtc Services Limited | Professional & scientific | 2024 |
| NON Investments LLP | | 2012 |
| Noor Emsworth Ltd | Wholesale & retail | 2025 |
| Norgine Ventures Management Limited | Financial services | 2013 |
| Northcote Financial Services Limited | Professional & scientific | 2019 |
| Northney Powerboat Training Ltd | Education | 2026 |
| Northneypowerboattrading Ltd | Arts & recreation | 2026 |
| Nvent Limited | Information & communication | 2015 |
| O'Hagan's Outside Catering Ltd | Hospitality | 2020 |
| Oakland Taverns Ltd | Hospitality | 2024 |
| Oakleigh Property Services Ltd | Construction | 2023 |
| Ocean Chandlery Ltd | Wholesale & retail | 1981 |
| OCT Consultancy Ltd | Professional & scientific | 2025 |
| OIL Ltd | Professional & scientific | 2010 |
| Old Rectory Close (Westbourne) Managementcompany Limited | Administrative & support | 1967 |
| Om-Con Limited | Professional & scientific | 2022 |
| Omphalos Property Limited | Real estate | 2011 |
| ON Properties Limited | Real estate | 2020 |
| Onuggs Ltd | Wholesale & retail | 2023 |
| Onz&Rms Ltd | Transport & logistics | 2020 |
| Open Sky Consulting International Ltd | Education | 2016 |
| Orange Wash Group Limited | Administrative & support | 2023 |
| Orchard Leas (Hermitage) Management Company Limited | Real estate | 1996 |
| Original Events Ltd | Wholesale & retail | 2023 |
| ORO Consulting Ltd | Professional & scientific | 2025 |
| OTS Mediahouse Ltd | Wholesale & retail | 2023 |
| OUR Back Garden Limited | Arts & recreation | 2019 |
| OUR Little Place Ltd | Hospitality | 2023 |
| Outerpilot Limited | Professional & scientific | 2025 |
| Oxbridge Answers Limited | Administrative & support | 2010 |
| Oyster Accountancy Services Limited | Professional & scientific | 2022 |
| Oyster Marketing and Design Limited | Information & communication | 2000 |
| P&C Carpets & Flooring Holdings Limited | Financial services | 2025 |
| P&C Carpets & Flooring Limited | Wholesale & retail | 2002 |
| P&C Lettings Ltd | Real estate | 2019 |
| Passion Detail Ltd | Professional & scientific | 2019 |
| Pates Heating Limited | Construction | 2019 |
| Paul Elswood Consulting Limited | Professional & scientific | 2017 |
| Paul Handley Design Limited | Professional & scientific | 2011 |
| Payne Property Services Limited | Financial services | 2023 |
| Peach Solutions Ltd | Construction | 2025 |
| Peak Roofing Hampshire Ltd | Construction | 2025 |
| Penmark Consultancy Limited | Professional & scientific | 2022 |
| Peterborough Villas Limited | Extraterritorial | 2012 |
| Phoenix Engineering & Industrial Gases Limited | Wholesale & retail | 2017 |
| PIG & Chicken Limited | Information & communication | 2012 |
| Pinkfiit Limited | Arts & recreation | 2016 |
| PJ Developments Limited | Construction | 2015 |
| PK Duffy Holdings Ltd | Financial services | 2021 |
| POH Professional Services Limited | Professional & scientific | 2023 |
| Point South Limited | Professional & scientific | 2015 |
| Polymer Concepts Limited | Professional & scientific | 2012 |
| Positive Intent LLP | | 2006 |
| Power Aerobatics Limited | Education | 2000 |
| Practical Performance Ltd | Information & communication | 2016 |
| Pragasam Limited | Professional & scientific | 2024 |
| PRE Contract Services Ltd | Professional & scientific | 2013 |
| Premiership Paving Limited | Other services | 2013 |
| Priors Consultancy (Southern) Ltd | Other services | 2021 |
| Pro-Build Renovation & Property Services Ltd | Construction | 2025 |
| Profecy Limited | Professional & scientific | 2002 |
| PROJECT1 General Contracting (UK) Limited | Construction | 2025 |
| Psychology Chartered Limited | Health & social care | 2002 |
| PWM Designs Ltd | Professional & scientific | 2013 |
| QP Plus Limited | Professional & scientific | 2020 |
| Quality Partnership Solutions Limited | Professional & scientific | 2005 |
| Quantum Heating and Energy Solution's Ltd | Construction | 2023 |
| Queenie's Travelling Teapot Ltd | Hospitality | 2019 |
| R & M Bailey Ltd | Construction | 2013 |
| R Russell GAS & Plumbing Limited | Construction | 2013 |
| Racquet Sports Group Limited | Wholesale & retail | 2012 |
| Rain-Tec Limited | Extraterritorial | 2014 |
| Rampion Consulting Limited | Administrative & support | 2022 |
| Rasheed Investments Ltd | Real estate | 2025 |
| Raven Installations Ltd | Construction | 2026 |
| RAW Timber UK Ltd | Wholesale & retail | 2025 |
| RB Consulting and Associates Limited | Professional & scientific | 2017 |
| Redcroft 7 Limited | Real estate | 2017 |
| Reflective Accounting Ltd | Professional & scientific | 2021 |
| Rehill Construction Ltd | Construction | 2021 |