| Ovi's Removals Ltd | Transport & logistics | 2023 |
| Ovos Building Services Ltd | Construction | 2023 |
| OVY Construction Ltd | Construction | 2022 |
| Owen Medical Limited | Health & social care | 2025 |
| OWP Property Ltd | Real estate | 2023 |
| Oxbridge Partners Ltd | Real estate | 2019 |
| Oxen Transport Ltd | Other services | 2016 |
| Oxford Gate Education Ltd | Education | 2026 |
| Oxford Original Ltd | Wholesale & retail | 2024 |
| Oxford Orthodontics (Holdings) Limited | Health & social care | 2015 |
| Oxford Orthodontics Limited | Health & social care | 2015 |
| Oxgate Surfacing Limited | Construction | 2020 |
| P & JJ Engineering Services Limited | Professional & scientific | 2026 |
| P & K Associates Limited | Professional & scientific | 2010 |
| P & S Design Concrete Limited | Construction | 2013 |
| P & S Grocers Limited | Wholesale & retail | 2014 |
| P M M Property Maintenance Limited | Households | 2005 |
| P Nicolae & Sister Ltd | Construction | 2019 |
| P Reddington Electrical Limited | Construction | 2007 |
| P&F Investment Ltd | Administrative & support | 2020 |
| P&K1 Properties Ltd | Real estate | 2024 |
| P&M Painting Ltd | Construction | 2026 |
| P&S Property Services Limited | Real estate | 2020 |
| P. M. Dental Ceramics Limited | Manufacturing | 2010 |
| P3M3 Services Limited | Information & communication | 2014 |
| P9C Limited | Information & communication | 2022 |
| Paakiza Banuk Limited | Wholesale & retail | 2018 |
| Paals Ltd | Real estate | 2021 |
| Pacha Food Centre Ltd | Wholesale & retail | 2025 |
| Pacific Transactions Limited | Other services | 2019 |
| Pacify Limited | Education | 2020 |
| Packrat Limited | Professional & scientific | 2003 |
| Packs Travel Ltd | Administrative & support | 2022 |
| Pact Investments Limited | Real estate | 2017 |
| Padel Box Group Limited | Arts & recreation | 2026 |
| Padel Box Holdings Limited | Financial services | 2024 |
| Padlet Ltd | Real estate | 2012 |
| Pagarani International Limited | Wholesale & retail | 1998 |
| Pagarani Properties Ltd | Real estate | 2017 |
| Pagli Limited | Wholesale & retail | 2018 |
| Paint & Painters Ltd | Wholesale & retail | 2020 |
| PAK Asian Cargo Service (UK) Limited | Administrative & support | 2015 |
| Pakvan Ltd | Hospitality | 2026 |
| PAL Automotive Limited | Wholesale & retail | 2025 |
| PAL Decorating Ltd | Construction | 2022 |
| Palissandro Limited | Professional & scientific | 2018 |
| Pallas International Ltd. | Real estate | 1999 |
| Palm Assets Limited | Real estate | 2003 |
| Palms & Properties Ltd | Financial services | 2016 |
| Pamir Driving School Ltd | Education | 2021 |
| Pamir Enterprise Ltd | Real estate | 2024 |
| PAN Exim Limited | Wholesale & retail | 2021 |
| Panaroma Properties Limited | Real estate | 2020 |
| Panclip Ltd | Wholesale & retail | 2025 |
| Panda Artists Ltd | Construction | 2016 |
| Panda Expand Ltd | Professional & scientific | 2025 |
| Pandit & Associates Limited | Professional & scientific | 2002 |
| Pandya & Sons Ltd | Hospitality | 2019 |
| Panina Group Limited | Real estate | 2025 |
| Pansella Limited | Professional & scientific | 2025 |
| Pantheon Volleyball Ltd | Arts & recreation | 2024 |
| Panwar Capital Limited | Financial services | 2020 |
| Panwick Limited | Professional & scientific | 2025 |
| Panworth Limited | Professional & scientific | 2025 |
| Papyr Ltd | Administrative & support | 2019 |
| Para & Manju Properties Ltd | Real estate | 2025 |
| Parametric AI Ltd | Information & communication | 2024 |
| Parcifal Holding Ltd | Financial services | 2025 |
| Parcifal Trading Ltd | Wholesale & retail | 2025 |
| Parekhs Limited | Professional & scientific | 2009 |
| Pari Home Style Ltd | Wholesale & retail | 2018 |
| Parica Properties Ltd | Real estate | 2024 |
| Parinur Ltd | Wholesale & retail | 2023 |
| Paris Legore Limited | Wholesale & retail | 2012 |
| Parish Holdings 1 Limited | Real estate | 2022 |
| Parisio Productions Limited | Information & communication | 1993 |
| Park Street Newbury Ltd | Construction | 2021 |
| Parkfield Close Flats (1-18) Limited | Real estate | 1996 |
| Parkfield Close Maisonettes (19-22) Ltd | Households | 1996 |
| Parkgate (M.M.S.) Limited | Information & communication | 1997 |
| Parkline Ltd | Real estate | 2015 |
| Parkrange Investments Limited | Real estate | 2021 |
| Parkside Cars London Ltd | Wholesale & retail | 2025 |
| Parkside Dining Ltd | Wholesale & retail | 2022 |
| Parkside Kitchen Ltd | Hospitality | 2024 |
| Parkside Motors Limited | Wholesale & retail | 2014 |
| Parkville Assets Limited | Construction | 2025 |
| Parkville Investments Limited | Construction | 2025 |
| PARR28 Ltd | Wholesale & retail | 2026 |
| Parsceylon Ltd | Wholesale & retail | 2024 |
| Parte Properties Ltd | Real estate | 2019 |
| Parthenon Ventures Limited | Real estate | 2022 |
| Partnear Limited | Other services | 2006 |
| Partner Plus Limited | Wholesale & retail | 2003 |
| Party Edge Ltd | Hospitality | 2021 |
| Party Specs Ltd | Wholesale & retail | 2025 |
| Pasaila Limited | Construction | 2015 |
| Pasee Ltd | Real estate | 2015 |
| Pasha Assets Limited | Real estate | 2025 |
| Pasha's Catering Limited | Hospitality | 2020 |