| Nobelo Ltd | Professional & scientific | 2022 |
| Noble Home Interiors Ltd | Construction | 2024 |
| Nordic Travel Solutions Ltd | Professional & scientific | 2019 |
| Npco Ltd | Administrative & support | 2019 |
| NTH Level Consulting Limited | Administrative & support | 2008 |
| NXT Media Limited | Information & communication | 2024 |
| Oakdene Laundry Ltd | Other services | 2011 |
| Oakley House Ltd | Health & social care | 2010 |
| Objectum Consulting Limited | Professional & scientific | 2016 |
| Odee Video Ltd | Information & communication | 2020 |
| Odline Limited | Wholesale & retail | 2006 |
| Offanonagen Ltd | Information & communication | 2016 |
| Office Base (Holdings) Limited | Professional & scientific | 1988 |
| Office Base Limited | Manufacturing | 1988 |
| Ojta Lodge Investments Limited | Real estate | 2013 |
| OKF Ventures Limited | Information & communication | 2016 |
| Olibecc Rigging Limited | Construction | 2021 |
| Omonova Homes Ltd | Real estate | 2025 |
| Omrp Ltd | Professional & scientific | 2018 |
| ON Cloud Wine ZA Ltd | Wholesale & retail | 2021 |
| ON Target Consultants Ltd | Professional & scientific | 2011 |
| One Nice Thing Ltd | Other services | 2018 |
| Orca Design and Production Limited | Arts & recreation | 2003 |
| Orchard & Wyse Legal Limited | Professional & scientific | 2019 |
| Origin Comms Ltd | Professional & scientific | 2011 |
| Outsy Kids Limited | Wholesale & retail | 2022 |
| Oxenmill Limited | Real estate | 2020 |
| Oütsi Group Ltd | Wholesale & retail | 2021 |
| O’Gorman Leadership Consulting Ltd | Professional & scientific | 2024 |
| P Nielsen Limited | Information & communication | 2023 |
| P&V Medical Care Ltd | Health & social care | 2025 |
| Padma Holdings Limited | Information & communication | 2018 |
| Paradigm Developments Limited | Professional & scientific | 2002 |
| Paragon Cleaning Management Limited | Administrative & support | 2015 |
| Park Paws Ltd | Other services | 2022 |
| Partner for Success Advisory Services Ltd | Professional & scientific | 2026 |
| Patrick Myles Productions Ltd | Information & communication | 2018 |
| Paula Morrison Interiors Limited | Professional & scientific | 2010 |
| Pauline Charles Limited | Real estate | 2025 |
| Pechinko Limited | Administrative & support | 2026 |
| Pegstan Limited | Real estate | 2021 |
| Penhallow HR Limited | Administrative & support | 2017 |
| Penhelm Ltd | Professional & scientific | 2019 |
| Pentaberk Limited | Real estate | 1976 |
| Pentalibra Limited | Professional & scientific | 2009 |
| Perfect Ratio Consulting Limited | Information & communication | 2023 |
| Perfume Pictures Limited | Administrative & support | 2012 |
| Peritus Limited | Health & social care | 2017 |
| Peryer Properties Ltd | Real estate | 2022 |
| Pharma Capabilities Limited | Professional & scientific | 2024 |
| Pharmatrialvalley Ltd | Professional & scientific | 2019 |
| Pharmawork Limited | Professional & scientific | 2000 |
| Phased Electrical Limited | Construction | 2014 |
| Phil Reed Design Ltd. | Professional & scientific | 2018 |
| PI 400 Limited | Real estate | 2005 |
| Pick UP Studios Ltd | Information & communication | 2025 |
| Picture That Limited | Information & communication | 2015 |
| Pier 32 Ltd | Wholesale & retail | 2003 |
| Pierbel Limited | Other services | 2013 |
| Pitts Holdings Ltd | Wholesale & retail | 2024 |
| Pivotal Economics Limited | Professional & scientific | 2019 |
| Pixel Productions Limited | Information & communication | 1993 |
| Pixel Productions Media LLP | | 2019 |
| PJ Aero Day Ltd | Professional & scientific | 2019 |
| Planet Warriors Kids Club Ltd | Health & social care | 2024 |
| Platform Consulting 21 Limited | Construction | 2006 |
| Platform Smart Limited | Information & communication | 2015 |
| Platt Media Productions Limited | Information & communication | 2012 |
| Playtune Limited | Information & communication | 2024 |
| Playtune Publishing Limited | Information & communication | 2025 |
| PM PYM Ltd | Construction | 2022 |
| Pmflight Limited | Administrative & support | 2009 |
| POP Staycations Ltd | Hospitality | 2023 |
| Praetorian Consulting Limited | Professional & scientific | 2010 |
| Preferredsoft Limited | Information & communication | 2003 |
| Prices Farms Limited | Financial services | 1956 |
| Primavera Property Holdings Limited | Real estate | 2025 |
| Prime Caterers Ltd | Hospitality | 2025 |
| PRL Accounting Ltd | Professional & scientific | 2020 |
| Profit Growing Innovator Ltd | Information & communication | 2021 |
| Profusion Consulting UK Ltd | Real estate | 2020 |
| Profusion Property Consulting Ltd | Real estate | 2020 |
| Progress Planning Services Ltd | Construction | 2015 |
| Properties 2AT Ltd | Hospitality | 2024 |
| Property Investments (Derbyshire) Limited | Administrative & support | 2011 |
| Prosperity Life Planning Ltd | Financial services | 2017 |
| Protocol Media Ltd | Professional & scientific | 2019 |
| Public Incorporated Limited | Administrative & support | 2016 |
| Pure Performance Limited | Education | 2017 |
| Purple (London) Limited | Administrative & support | 2014 |
| Purple Peptides Ltd | Wholesale & retail | 2026 |
| Pyrios Limited | Professional & scientific | 2016 |
| Quade Limited | Professional & scientific | 2021 |
| Quest Productions (UK) Limited | Information & communication | 2013 |
| Quillrange Limited | Wholesale & retail | 1978 |
| R Bar Ltd | Hospitality | 2009 |
| R J Faulkner Ltd | Real estate | 2009 |
| R&B Hunter Property Ltd | Real estate | 2026 |
| RA RA Designs Limited | Other services | 2014 |
| Rachael Fraser Coaching Ltd | Health & social care | 2015 |