| New Horizons Accounting Services Ltd | Professional & scientific | 2023 |
| New Works Ballet Theatre CIC | Arts & recreation | 2022 |
| Nexassist Ltd | Administrative & support | 2025 |
| Next Generation Sci-Tech Ltd | Real estate | 2022 |
| Next Vehicle Solutions Ltd | Wholesale & retail | 2025 |
| Niam Consulting Ltd | Professional & scientific | 2017 |
| Nibble Catering Ltd | Hospitality | 2023 |
| Nigelfrith Limited | Information & communication | 2024 |
| Nightshadow Limited | Financial services | 2024 |
| NJM Design Ltd | Professional & scientific | 2016 |
| Njoy Training Ltd | Administrative & support | 2014 |
| NMG Fishery Limited | Agriculture & fishing | 2020 |
| NO Limit Scaffolding Services Limited | Construction | 2013 |
| NO. 1 Mechanical Ltd | Construction | 2018 |
| Noise Solutions Holdings Limited | Professional & scientific | 2002 |
| Noise Solutions Limited | Manufacturing | 1997 |
| Nomad Agencies Limited | Wholesale & retail | 2019 |
| North Face Barber Ltd | Other services | 2021 |
| Nose Over Toes Limited | Other services | 2021 |
| Nova Broadcast Ltd | Administrative & support | 2026 |
| Novello Events Limited | Hospitality | 2023 |
| Novo Solutions Ltd | Professional & scientific | 2011 |
| NSM Distribution Limited | Wholesale & retail | 2002 |
| Nuvvon Ltd. | Professional & scientific | 2024 |
| NW Make-Up Academy Limited | Education | 2023 |
| Nwmakeup Hair and Make UP Limited | Other services | 2016 |
| Oakhanger Business Park Ltd | Real estate | 2024 |
| Oakhanger Storage Limited | Transport & logistics | 2019 |
| Oaklands Agency Ltd | Professional & scientific | 2023 |
| Oakvango Health Care Ltd | Health & social care | 2024 |
| Obra Consulting Ltd | Administrative & support | 2021 |
| Ockham Hall Limited | Households | 1977 |
| OK Lettings Limited | Real estate | 2021 |
| Omjp Construction Limited | Manufacturing | 2025 |
| ON Location Hire Limited | Financial services | 2017 |
| One Element Limited | Arts & recreation | 2007 |
| Onetohold Ltd | Information & communication | 2024 |
| Onetostay Limited | Information & communication | 2024 |
| Ongley Productions Limited | Information & communication | 2016 |
| Ontrack Heating Ltd | Construction | 2023 |
| Ontv Media Services Ltd | Extraterritorial | 2019 |
| Optiedge.Ai Limited | Information & communication | 2019 |
| Optimal Cosmetics Ltd | Health & social care | 2018 |
| Orange Tree Partnership Limited | Professional & scientific | 2015 |
| Orava Limited | Professional & scientific | 2024 |
| Orbius Ltd | Manufacturing | 2016 |
| Orchard Drive Lindford Management Limited | Real estate | 2003 |
| Orion Fleet & Mobility Consultancy Ltd | Professional & scientific | 2026 |
| Orphic Digital Marketing Limited | Professional & scientific | 2017 |
| OSL Promotional Clothing Limited | Manufacturing | 2012 |
| Osteopathealthcare Ltd | Health & social care | 2022 |
| OUR Galia Ltd | Information & communication | 2019 |
| OUR Horizon Ltd | Transport & logistics | 2015 |
| Outcasts Adventures Ltd | Education | 2026 |
| Owlistic Therapies Limited | Other services | 2023 |
| Ozdyne Ltd | Information & communication | 2025 |
| P Day Services Ltd | Administrative & support | 2022 |
| P P L Media Limited | Professional & scientific | 1987 |
| P2W Ltd | Wholesale & retail | 2022 |
| P4M Coaching Limited | Other services | 2022 |
| Pace 21 (Facilities) Limited | Administrative & support | 2002 |
| Palazzo Cleaning Limited | Administrative & support | 2017 |
| Parakone Ltd | Health & social care | 2015 |
| Parico Limited | Information & communication | 2018 |
| Parry and Sons Removals Ltd | Transport & logistics | 2018 |
| Paul Bonner Roofing Limited | Construction | 2011 |
| Paul Chiles Healthcare Transformation Limited | Professional & scientific | 2010 |
| Paul Downing Ltd | Professional & scientific | 2012 |
| Peach Perfect PR Limited | Professional & scientific | 2022 |
| Pegasus Elite Driver Training Ltd | Education | 2025 |
| Perfect Coat Plastering Limited | Construction | 2025 |
| Peter Hoole Limited | Professional & scientific | 2006 |
| Pg-Cleaning Limited | Administrative & support | 2016 |
| Pgak Ltd | Transport & logistics | 2019 |
| Phoenix Rising Global Ltd | Education | 2019 |
| Photo Storm Limited | Wholesale & retail | 2015 |
| Photoshopuk Limited | Arts & recreation | 2016 |
| Pianosmiths Ltd | Wholesale & retail | 2021 |
| Pinewood Transport and Recovery Ltd | Transport & logistics | 2026 |
| Pint Ltd | Wholesale & retail | 2016 |
| Pitboxx Limited | Transport & logistics | 2024 |
| Pitch Consulting Limited | Information & communication | 2013 |
| Pivale Ltd | Information & communication | 2010 |
| Pivotal Property Management Ltd | Real estate | 2024 |
| Plan-It Cards Limited | Information & communication | 2000 |
| Platform Info Exchange Limited | Information & communication | 2019 |
| Platinum Glazing and Building Services Ltd | Construction | 2020 |
| Platinum Property Improvements Ltd | Construction | 2020 |
| Playscapes Limited | Construction | 2010 |
| Plenty of Stuff Studio Ltd | Professional & scientific | 2024 |
| Plover Squad Ltd | Administrative & support | 2020 |
| Plum Courier Services Ltd | Transport & logistics | 2019 |
| Polaris.Studio Limited | Professional & scientific | 2023 |
| Polked Ltd | Construction | 2014 |
| Polymax Holdings Limited | Financial services | 2022 |
| Polymax Limited | Wholesale & retail | 2004 |
| Powerquad Limited | Manufacturing | 2018 |
| PQ Systems Ltd | Professional & scientific | 2026 |
| PQS Consultancy Ltd | Construction | 2014 |
| PR Landscaping Ltd | Administrative & support | 2020 |