| Oxygen Group Ltd | Professional & scientific | 2016 |
| Oxysys Private Limited | Information & communication | 2021 |
| Oxytane UK Limited | Wholesale & retail | 2008 |
| Oxzeon Limited | Information & communication | 2018 |
| OYA on Time Ltd | Hospitality | 2025 |
| Oyad Limited | Real estate | 2024 |
| Oyanet Ltd | Information & communication | 2024 |
| Oyat Organic Limited | Other services | 2024 |
| Oyster Invest LLP | | 2015 |
| Ozair Healthcare Ltd | Health & social care | 2022 |
| Ozkanim Consultancy Ltd | Professional & scientific | 2018 |
| Ozone Laundry Systems Limited | Manufacturing | 2011 |
| Ozoo Limited | Wholesale & retail | 2019 |
| P & a Management Limited | Households | 2022 |
| P & D Nauchandra Ltd | Households | 2020 |
| P & L Salon Limited | Arts & recreation | 2008 |
| P & M Properties Trading Partnership LLP | | 2021 |
| P & S Food Limited | Hospitality | 2009 |
| P & V Associates Ltd | Real estate | 2021 |
| P & V Developments Ltd | Real estate | 2022 |
| P & V Enterprise Ltd | Manufacturing | 2025 |
| P & V Invest Ltd | Construction | 2022 |
| P a Haran Electrical Contractors Limited | Construction | 2006 |
| P a R Property Company Limited | Real estate | 2013 |
| P Brothers Construction Ltd | Construction | 2021 |
| P D Transport 68 Ltd | Transport & logistics | 2025 |
| P Featherstone Developments Limited | Construction | 2015 |
| P Gordon Limited | Manufacturing | 2015 |
| P J H Signalling Limited | Administrative & support | 2015 |
| P K Properties (London) Limited | Real estate | 1995 |
| P Leiwy & Co Ltd | Professional & scientific | 2002 |
| P M O Physio Therapy Limited | Health & social care | 2015 |
| P Mahes Consulting Ltd | Professional & scientific | 2025 |
| P Properties Ltd | Real estate | 2017 |
| P R Properties and Investments Ltd | Real estate | 2022 |
| P R Property Renovation Ltd | Construction | 2021 |
| P W a Solutions Limited | Information & communication | 2006 |
| P&A Businesses Limited | Hospitality | 2025 |
| P&A Health Ltd | Health & social care | 2018 |
| P&A Property Group Ltd | Real estate | 2026 |
| P&B Perspective Ltd | Information & communication | 2018 |
| P&D Carpenters Ltd | Construction | 2017 |
| P&E Consultancy Services Limited | Information & communication | 2020 |
| P&F Cleaning Solutions Ltd | Administrative & support | 2024 |
| P&F Domestic Solutions Ltd | Manufacturing | 2022 |
| P&F Events Ltd | Hospitality | 2024 |
| P&G Corporation UK Ltd | Wholesale & retail | 2023 |
| P&G Facade Ltd | Construction | 2019 |
| P&K Management Services Ltd | Other services | 2011 |
| P&K Property Deal Experts Limited | Real estate | 2025 |
| P&K Property Investment Ltd | Real estate | 2018 |
| P&M Properties Trading Ltd | Real estate | 2020 |
| P&M Selvaranjan Limited | Health & social care | 2025 |
| P&P Accountants Services Ltd | Professional & scientific | 2020 |
| P&P Bookkeeping Limited | Administrative & support | 2011 |
| P&P Global Ltd | Professional & scientific | 2015 |
| P&P Property Portfolio Limited | Wholesale & retail | 2020 |
| P&R Smiles Limited | Health & social care | 2026 |
| P&S Prime Ltd | Real estate | 2026 |
| P-H Beauty Salon Ltd | Other services | 2026 |
| P-J-Zen Property Ltd | Real estate | 2023 |
| P-Ra Construction Limited | Construction | 2025 |
| P. & J. Ellis Limited | Transport & logistics | 1982 |
| P. Mcfadden Builders Limited | Construction | 1997 |
| P. R. Architecture Limited | Professional & scientific | 2003 |
| P.A.D Interiors Acquisitions Limited | Construction | 2024 |
| P.Ac.E Building Services (UK) Limited | Construction | 2001 |
| P.Gailey Services Limited | Construction | 2024 |
| P.I.E. Pharma Limited | Manufacturing | 1996 |
| P.S Building Electrical Services Ltd | Construction | 2022 |
| P.S.B. Engineering Limited | Manufacturing | 1987 |
| P.W.R.( Roofing) Limited | Construction | 2021 |
| P2G Consult Limited | Professional & scientific | 2021 |
| P2N Fashion Limited | Wholesale & retail | 2018 |
| P2P Platform Ltd | Financial services | 2016 |
| P2S2 93 Ltd | Professional & scientific | 2024 |
| P2UN Ltd | Real estate | 2025 |
| P3 Management Consulting Ltd | Information & communication | 2022 |
| P4Y4LSHP Limited | Hospitality | 2024 |
| P5 Consultancy Limited | Information & communication | 2017 |
| PA Benchmark Ltd | Construction | 2018 |
| Pa-Assist.Com Limited | Administrative & support | 1999 |
| Paah Consulting Limited | Construction | 2022 |
| Paasoon Investments Limited | Construction | 2016 |
| PAB5 Ltd | Administrative & support | 2014 |
| Pabari Emporium Limited | Real estate | 2021 |
| Pabari Limited | Professional & scientific | 2014 |
| PAC Dance Studio Limited | Arts & recreation | 2025 |
| Pach Properties Limited | Real estate | 2020 |
| Pacific Minerals & Metals (UK) Limited | Wholesale & retail | 2020 |
| Pacific Teak Limited | Construction | 2019 |
| Pack Send Harrow Ltd | Wholesale & retail | 2024 |
| Pack Your BAG Films (UK) PVT Limited | Information & communication | 2017 |
| Packaging Express Limited | Extraterritorial | 2019 |
| PACKET360 Networks Ltd | Information & communication | 2026 |
| Packmyfood Ltd | Wholesale & retail | 2019 |
| Packnpost Ltd | Administrative & support | 2023 |
| PAD Services (London) Ltd | Construction | 2025 |
| Padda Court RTM Company Limited | Households | 2015 |
| Paddlelife Ltd | Education | 2018 |