| Overwerx Ltd | Manufacturing | 2020 |
| Overwood Rock Limited | Real estate | 2017 |
| Ovivo UK Limited | Construction | 1909 |
| OW Energetics Ltd | Public administration | 2022 |
| Owais Ghani Ltd | Information & communication | 2024 |
| Owen Brothers Limited | Wholesale & retail | 1994 |
| Owen Payne Recruitment Care Services Limited | Administrative & support | 2023 |
| Owen Payne Recruitment Services (Holdings) Limited | Administrative & support | 2014 |
| Owen Payne Recruitment Services Limited | Administrative & support | 1999 |
| Owen Road Car Repair Ltd | Wholesale & retail | 2020 |
| OWL Properties Limited | Real estate | 2003 |
| Own Your Mortgage Ltd | Financial services | 2024 |
| Own Your Property Ltd | Real estate | 2022 |
| Ownier Limited | Professional & scientific | 2023 |
| Ownspeak Ltd | Professional & scientific | 2025 |
| Oxford Brook Ltd | Professional & scientific | 2025 |
| Oxford Cardiology Ltd | Health & social care | 2017 |
| Oxford Mobile Valeting Ltd | Other services | 2017 |
| Oxley Stationers & Printers Limited | Manufacturing | 2013 |
| OXR Trading Limited | Wholesale & retail | 2026 |
| Oxygene Ltd | Hospitality | 2023 |
| Ozoit Ltd | Wholesale & retail | 2023 |
| Oztools Ltd | Wholesale & retail | 2023 |
| Ozzydan Global Cago Limited | Real estate | 2025 |
| Oúey Wellness Ltd | Wholesale & retail | 2026 |
| P & B Haulage Ltd | Transport & logistics | 2025 |
| P & D York Travel LLP | | 2007 |
| P & H Baker Limited | Mining & quarrying | 2017 |
| P & H Express Limited | Wholesale & retail | 2008 |
| P & J Hands Ltd | Construction | 2022 |
| P & J Logistics Limited | Transport & logistics | 2011 |
| P & N Consultants Midlands Ltd | Professional & scientific | 2024 |
| P & R Engineering (Midlands) Limited | Construction | 1990 |
| P & R Holdings (Midlands) Limited | Financial services | 2018 |
| P Aujla Limited | Health & social care | 2016 |
| P B Wholesale Limited | Wholesale & retail | 2018 |
| P C P Gratings Limited | Manufacturing | 1986 |
| P H Furniture Limited | Professional & scientific | 1974 |
| P H Property Maintenance Limited | Construction | 2013 |
| P Hughes Contractors Limited | Construction | 2023 |
| P J Commercials Limited | Wholesale & retail | 1997 |
| P J Motorcycle Engineers Limited | Wholesale & retail | 2003 |
| P J Motorsport & Performance Centre Limited | Wholesale & retail | 1999 |
| P K & J Trading Limited | Real estate | 2008 |
| P K H Services Limited | Extraterritorial | 1999 |
| P K Hygiene Services Limited | Construction | 1999 |
| P K Super Stop Limited | Wholesale & retail | 2026 |
| P Makam Limited | Health & social care | 2008 |
| P Pods Ltd | Real estate | 2018 |
| P S Hall UK Exports Limited | Real estate | 2004 |
| P S R Properties Ltd | Real estate | 2018 |
| P Sons Investments Limited | Real estate | 2019 |
| P Walker GAS Limited | Construction | 2014 |
| P Y S Logistics Ltd | Transport & logistics | 2020 |
| P&C Smile Ltd | Health & social care | 2024 |
| P&D Professional Services Limited | Professional & scientific | 2014 |
| P&G Property Investments Limited | Real estate | 2025 |
| P&L Property Global Ltd | Real estate | 2024 |
| P&P Inc Ltd | Extraterritorial | 2026 |
| P&S Home Security Ltd | Administrative & support | 2012 |
| P&W Building Contractors Ltd | Construction | 2025 |
| P-76 Limited | Other services | 2023 |
| P. Osariemen Limited | Administrative & support | 2020 |
| P.C. Support Midlands Limited | Information & communication | 1998 |
| P.F. Stokes Associates Limited | Professional & scientific | 2015 |
| P.G. Investment Limited | Real estate | 1987 |
| P.H Takeaway Ltd | Hospitality | 2025 |
| P.Hassall (Rotherham) Limited | Professional & scientific | 1946 |
| P.J. Barnett Associates Limited | Construction | 2000 |
| P.O.D. Stainless Steel Products Limited | Manufacturing | 2001 |
| P.S. Landscapes Limited | Construction | 2006 |
| P.S.B. Investments Limited | Real estate | 2006 |
| P.T.321 Ltd | Hospitality | 2024 |
| P.Z.Arb Ltd | Agriculture & fishing | 2019 |
| P50 Services Ltd | Construction | 2019 |
| PA & MI Holding Ltd | Wholesale & retail | 2025 |
| PA Legal Solutions Limited | Professional & scientific | 2020 |
| Pa&Mi Healthcare Ltd | Health & social care | 2025 |
| Pa&Sg Properties Limited | Real estate | 2025 |
| Pabliano Limited | Wholesale & retail | 2020 |
| Pablo Drinks Limited | Wholesale & retail | 2025 |
| Pablo Pablo Limited | Wholesale & retail | 2020 |
| PAC WM Ltd | Wholesale & retail | 2021 |
| Paca Trans Ltd | Transport & logistics | 2017 |
| Pace Corp Ltd | Wholesale & retail | 2026 |
| Pacepay Payroll Solutions Ltd | Administrative & support | 2023 |
| Pachlo Healthcare Limited | Health & social care | 2022 |
| Pacific Cargo Limited | Transport & logistics | 2025 |
| Pack-N-Goexpress Limited | Transport & logistics | 2024 |
| PACK360 Limited | Administrative & support | 2013 |
| Packaging Mart Ltd | Manufacturing | 2023 |
| Packsphere Ltd | Manufacturing | 2025 |
| Padania Limited | Wholesale & retail | 2026 |
| Padda Transport and Logistics Limited | Transport & logistics | 2026 |
| Padda Transport Ltd | Transport & logistics | 2015 |
| Paddock Gardens Maintenance Limited | Real estate | 2023 |
| Padel Galaxy Ltd | Arts & recreation | 2025 |
| Padel Racket UK Ltd | Wholesale & retail | 2025 |
| Padet Ltd | Real estate | 2025 |
| Padmore Family Funerals Ltd | Other services | 2025 |