| Pelele Limited | Professional & scientific | 2005 |
| Peligoni Booking Services Limited | Real estate | 2005 |
| Peligoni Operations Ltd | Wholesale & retail | 2016 |
| Pellucidus Ltd | Administrative & support | 2011 |
| Penguin Beauty Limited | Other services | 2022 |
| Penguin Hair Limited | Other services | 2025 |
| Perdix Partnership Limited | Real estate | 2016 |
| Perfect Solutions Oxford Ltd | Real estate | 2014 |
| Performance Insights Limited | Other services | 2011 |
| Persistence Consulting Limited | Professional & scientific | 2019 |
| Pete Crapper & Sons Limited | Construction | 2009 |
| Peter Brown Inc Limited | Professional & scientific | 2022 |
| Phoenix Legal Consultants Limited | Professional & scientific | 2025 |
| Physio & Medical Supplies Limited | Wholesale & retail | 2010 |
| Pinewood Cleaning Services Ltd. | Administrative & support | 1990 |
| Pink Rainbow Design Ltd | Administrative & support | 2023 |
| PIQ & BOO Ltd | Wholesale & retail | 2025 |
| PIT Kitchens Events Ltd | Hospitality | 2023 |
| PIT Kitchens Ltd | Hospitality | 2021 |
| Pitchpoint Limited | Information & communication | 2018 |
| Pixel Consultancy Ltd | Administrative & support | 2020 |
| Pkjs Services Ltd | Construction | 2025 |
| PLA Limited | Real estate | 2000 |
| Planet Trading Limited | Agriculture & fishing | 1999 |
| Pmpd Consultancy Ltd | Professional & scientific | 2025 |
| Pogo Ltd | Professional & scientific | 2023 |
| Polar Snow Bear Ltd | Wholesale & retail | 2022 |
| POM Lampson Limited | Wholesale & retail | 2003 |
| Pop-Up Exhibitions Limited | Education | 2010 |
| Popdays Limited | Manufacturing | 2024 |
| Porthmeor Beach Flats Management Limited | Households | 2005 |
| Postal Advertisers Limited | Information & communication | 2001 |
| Potted Goose Ltd | Hospitality | 2019 |
| Potts & Co Accountants Ltd | Professional & scientific | 2026 |
| PP Payroll Solutions Limited | Professional & scientific | 2012 |
| Precision PEN Ltd | Professional & scientific | 2023 |
| Premier Construction (Oxon) Limited | Construction | 2020 |
| Premier Sports Brands Ltd | Wholesale & retail | 2003 |
| Premium Spray Insulation Ltd | Construction | 2015 |
| Press Steam Clean Limited | Other services | 2022 |
| Primal Harvests Limited | Wholesale & retail | 2020 |
| Prime Media Consultancy Limited | Other services | 2011 |
| Private Driver Club Ltd | Transport & logistics | 2018 |
| Pro Active Analysis Limited | Administrative & support | 2003 |
| Production Live Ltd | Administrative & support | 2018 |
| Project Mandarin Limited | Financial services | 2025 |
| Project Tyto Limited | Professional & scientific | 2026 |
| Protier Developments Limited | Real estate | 2024 |
| Ptero-Byte Limited | Professional & scientific | 2003 |
| Pudlicote Farm Limited | Financial services | 1990 |
| Puffin Communications Ltd | Professional & scientific | 2014 |
| Punch Farm Ltd | Agriculture & fishing | 2025 |
| Puppy School Limited | Professional & scientific | 2002 |
| Pure Drywall Limited | Construction | 2023 |
| Purple Haze (Oxford) Ltd | Wholesale & retail | 2015 |
| Quartermaster Group Limited | Professional & scientific | 2025 |
| Quercus Advisors Limited | Professional & scientific | 2018 |
| R H P Garages Limited | | 1981 |
| R J Blackwall Limited | Wholesale & retail | 2017 |
| R M Whitehouse & Co Limited | Professional & scientific | 2006 |
| R&A Derham Ltd | Wholesale & retail | 2023 |
| R&P Kennedy Ltd | Administrative & support | 2024 |
| R. Wakelin Heating Services Limited | Construction | 2003 |
| R.C. & G.T. Limited | Real estate | 2001 |
| R.M.H. Limited | Administrative & support | 2001 |
| R25R26BGP001 Limited | Professional & scientific | 2017 |
| Racing Car Films Ltd. | Information & communication | 2000 |
| Rafi Fatima Ltd | Hospitality | 2024 |
| Ralph Allen Yard Limited | Construction | 2010 |
| Ramdavsci Limited | Professional & scientific | 2024 |
| Ramon Mitchell Limited | Administrative & support | 2014 |
| Ramsden Events CIC | Other services | 2017 |
| Random Rental Ltd | Administrative & support | 2021 |
| Record Production Limited | Manufacturing | 2002 |
| Red Oak IM Limited | Real estate | 2015 |
| Red ST-8 Productions Ltd | Information & communication | 2025 |
| Red Track Promotions Limited | Professional & scientific | 2015 |
| Redcrest Limited | Professional & scientific | 1996 |
| Redlay Flooring Limited | Construction | 2007 |
| Refined Writing Ltd | Administrative & support | 2011 |
| Reformer Pilates Studios Ltd | Arts & recreation | 2025 |
| Regent Court (Chipping Norton) Management Limited | Households | 1998 |
| Reki Ltd | Information & communication | 2025 |
| Reliance UK Transport Ltd | Construction | 2019 |
| REN Collection Ltd | Hospitality | 2025 |
| Reta Labs X Ltd | Wholesale & retail | 2025 |
| Ribberty Rabbit Crafting CIC | Education | 2024 |
| Ribble Valley Northern Limited | Financial services | 2020 |
| Richard Knight Plumbing & Heating Ltd | Construction | 2011 |
| Richard Smith Funeral Directors Limited | Other services | 2025 |
| Richard Stamp Agencies Limited | Wholesale & retail | 1974 |
| Rick Hirst Consulting Ltd | Information & communication | 2025 |
| Rickard Landscapes Limited | Administrative & support | 2024 |
| Ridge Carbon Capture Ltd | Professional & scientific | 2020 |
| Ridge Clean Energy Ltd | Financial services | 2014 |
| Rise and Flour Ltd | Wholesale & retail | 2020 |
| Riserteq Limited | Manufacturing | 2021 |
| RMN Refractories Ltd. | Professional & scientific | 2003 |
| ROB Mcgrigor Limited | Professional & scientific | 2004 |
| Robin Akers Limited | Professional & scientific | 2011 |