| ON a Wick and a Prayer Limited | Manufacturing | 1992 |
| One Seventy Two Limited | Construction | 2022 |
| Opignac Ltd | Information & communication | 2026 |
| Optimal Change Ltd | Health & social care | 2010 |
| Optimal YOU Ltd | Wholesale & retail | 2024 |
| Opus Form Ltd | Manufacturing | 2026 |
| OR91 Holdings Ltd | Financial services | 2022 |
| Orchard Lane Residents Limited | Households | 2024 |
| Oski London Ltd | Manufacturing | 2026 |
| Ourstudio.Am Ltd | Professional & scientific | 2023 |
| OUT Loud Learning Ltd | Education | 2026 |
| Overtown Trees Ltd | Agriculture & fishing | 2017 |
| P J Allen Builders Limited | Construction | 2012 |
| P J Allen Developments Ltd | Construction | 2024 |
| P M Wrigley & Co Limited | Construction | 2013 |
| P Mellor Plumbing and Heating Limited | Construction | 2003 |
| P&B Staley Properties LLP | | 2026 |
| P&E Property, Sales, Lettings and Services Limited | Real estate | 2018 |
| P. a. K. O. HUI Ltd | Wholesale & retail | 2012 |
| P.M. Harris Limited | Construction | 1981 |
| P.M.W. Property Development Limited | Construction | 1976 |
| Paddock Court Management Company Limited | Households | 2021 |
| Paddock Ponies CIC | Health & social care | 2024 |
| Paisley Grove Developments Limited | Real estate | 1989 |
| Panda Express Ashbourne Limited | Hospitality | 2023 |
| Parkgate Nursery Limited | Health & social care | 2016 |
| Parnham Tractors Limited | Wholesale & retail | 1976 |
| Parsons Consulting Ltd | Administrative & support | 2023 |
| Pattruck Ltd | Wholesale & retail | 2019 |
| Pcba Ltd | Manufacturing | 2022 |
| Pcrobotics Limited | Manufacturing | 2003 |
| Peak Access Solutions Ltd | Construction | 2025 |
| Peak Autos Limited | Wholesale & retail | 2014 |
| Peak Civil Engineering Limited | Construction | 2015 |
| Peak Civils Limited | Construction | 2015 |
| Peak Digital Technology Limited | Information & communication | 2013 |
| Peak District Candle Company Ltd | Wholesale & retail | 2021 |
| Peak Garage Doors Limited | Construction | 2002 |
| Peak Gateway Limited | Hospitality | 1989 |
| Peak Management Associates (Ashbourne) Limited | Professional & scientific | 2013 |
| Peak Performance Autos Limited | Extraterritorial | 2018 |
| Peak Premium Skirting and Timber Limited | Wholesale & retail | 2020 |
| Peak Property Restoration Ltd | Construction | 2013 |
| Peak Safety Solutions Ltd | Construction | 2023 |
| Peak Stays Limited | Hospitality | 2021 |
| Peak Sunbeds Home Hire Ltd | Administrative & support | 2020 |
| Peak Survey and Valuation Ltd | Professional & scientific | 2023 |
| Peak Surveying & Engineering Limited | Construction | 2003 |
| Peak UV Ltd | Wholesale & retail | 2019 |
| Peak Waste Recycling Limited | Water & waste | 1981 |
| Pebble Associates (UK) Limited | Professional & scientific | 2019 |
| Penergetic UK Limited | Professional & scientific | 2012 |
| Penlee Limited | Construction | 2012 |
| Penmha Ltd | Administrative & support | 2022 |
| Peopletown Ltd | Professional & scientific | 2022 |
| Perpetro Ltd. | Professional & scientific | 2017 |
| Perrymead Property Ltd | Real estate | 2025 |
| Pete Curley Brickwork Contractors Limited | Construction | 2012 |
| Pete Robinson & SON Limited | Construction | 2012 |
| Peter Collie Limited | Professional & scientific | 2017 |
| Peter Phillips Properties Limited | Real estate | 1983 |
| PGD IT Services Ltd | Information & communication | 2021 |
| Pharma-Prove Ltd | Information & communication | 2020 |
| Phoenix Refractories UK Ltd | Construction | 2007 |
| Pichler Tools Ltd | Wholesale & retail | 2012 |
| Pickled Ginger PUB Co Ltd | Hospitality | 2011 |
| Pillar Estates Ltd | Real estate | 2025 |
| Pinxton & Co. Limited | Wholesale & retail | 2019 |
| Pipe Hayes Farm Limited | Agriculture & fishing | 2014 |
| Pipe Hayes Limited | Professional & scientific | 2021 |
| Pipehay Lane 1969 Limited | Extraterritorial | 2014 |
| Pipster Property Ltd | Other services | 2018 |
| Planet Untold Limited | Information & communication | 2024 |
| Plot 10 DVP Management Company Limited | Real estate | 2019 |
| Plot 6 Castlewood Limited | Real estate | 2016 |
| Plot 9 Castlewood Limited | Real estate | 2012 |
| Plot C Castlewood Limited | Real estate | 2013 |
| Plover Management Company Limited | Real estate | 2021 |
| Plyfa Holdings Ltd | Financial services | 2021 |
| PMB Freight Limited | Transport & logistics | 2021 |
| PMW Doveway Limited | Construction | 2023 |
| PMW Property Investments Limited | Real estate | 2021 |
| Podmore Contracting Limited | Construction | 2017 |
| Pointtechno Limited | Wholesale & retail | 1988 |
| Polar Refrigeration Hire Limited | Administrative & support | 2003 |
| Pontardawe Coal and Metals Company Limited(The) | Real estate | 1950 |
| Pool Sentry Limited | Manufacturing | 2004 |
| Poppins & Co Illustrations Limited | Wholesale & retail | 2021 |
| Porter TFT Limited | Manufacturing | 2026 |
| Portofino Group LLP | | 2007 |
| Postremo Holdings Limited | Financial services | 2024 |
| Postremo Ltd | Professional & scientific | 2024 |
| Premier Amusement Supplies Limited | Arts & recreation | 2002 |
| Preserva (Midlands) Limited | Construction | 1977 |
| Preserva Limited | Construction | 1994 |
| Prestex Services UK Ltd | Water & waste | 2023 |
| Pride Retail Limited | Wholesale & retail | 2019 |
| Primary Stars Sports Provision Ltd | Education | 2023 |
| Primeline Logistics | | 2013 |
| Primesy Designs Limited | Other services | 2016 |