| Optimise Your Marketing Ltd | Professional & scientific | 2011 |
| Optimum Vehicles Limited | Wholesale & retail | 2008 |
| Opus Ventures (Synergy) Limited | Financial services | 2003 |
| Oram Awards CIC | Arts & recreation | 2023 |
| Orchard View Homes Limited | Construction | 2015 |
| Orchard View Property Letting Limited | Real estate | 2025 |
| Orrell Professional Services Ltd | Professional & scientific | 2015 |
| Oryx Off-Road Ltd | Wholesale & retail | 2017 |
| OTE Lifting Ltd | Construction | 2024 |
| OTE Property Ltd | Real estate | 2026 |
| OUT There Investments Ltd | Real estate | 2015 |
| Oven Rescue Derbyshire Ltd | Administrative & support | 2025 |
| Owen Rose Properties Ltd | Real estate | 2023 |
| Oxecom Ltd | Wholesale & retail | 2025 |
| Oxford Fleet Management Limited | Information & communication | 1992 |
| Oxford One Beauty Limited | Other services | 2010 |
| P Brookes Associates Limited | Professional & scientific | 2008 |
| P Games Limited | Manufacturing | 2009 |
| P J Loghades & Grandson Ltd | Construction | 2011 |
| P M Carnell & Sons Ltd | Administrative & support | 2017 |
| Packhorse Farm Campsite Ltd | Hospitality | 2026 |
| Paddock Motors Ltd | Extraterritorial | 2011 |
| Palfreyman Properties Limited | Real estate | 2023 |
| Pallas Solutions Limited | Information & communication | 2013 |
| Panasset Ltd. | Real estate | 2017 |
| Parallel Associates Limited | Administrative & support | 2007 |
| Parameter Trading and Maintenance Limited | Professional & scientific | 1995 |
| Park Edge Management Company (Matlock) Limited | Real estate | 2013 |
| Parkdex Ventures Limited | Wholesale & retail | 2003 |
| Parkes Site Engineering Ltd | Construction | 2007 |
| Parkside Fitness Ltd | Arts & recreation | 2021 |
| Parkys Eatery Ltd | Hospitality | 2016 |
| Partnexa Infrastructure Ltd | Professional & scientific | 2026 |
| Pathways (HR & D) Limited | Education | 1995 |
| Patrick Savage Limited | Professional & scientific | 2007 |
| Paulmark Properties Ltd | Real estate | 2014 |
| Pawfect Manners Dog Training Ltd | Education | 2025 |
| Payment Bods Limited | Professional & scientific | 2020 |
| Peak Action Ltd | Hospitality | 2016 |
| Peak and Dale Holidays Limited | Hospitality | 2016 |
| Peak Cyber Ltd | Information & communication | 2025 |
| Peak Design Limited | Professional & scientific | 2003 |
| Peak District Accountants Ltd | Professional & scientific | 2022 |
| Peak District Plumbing Ltd | Construction | 2025 |
| Peak District Products Limited | Arts & recreation | 1996 |
| Peak Drain Services Limited | Water & waste | 2015 |
| Peak Drilling Site Investigation and GEO Services Ltd | Construction | 2024 |
| Peak Electrical Supplies Holdings Ltd | Financial services | 2025 |
| Peak Electrical Supplies Limited | Wholesale & retail | 1995 |
| Peak Fable Limited | Information & communication | 2024 |
| Peak Fabrications Ltd | Manufacturing | 2024 |
| Peak Glaze Limited | Construction | 2002 |
| Peak Green Limited | Real estate | 2022 |
| Peak Holiday Properties Limited | Real estate | 2019 |
| Peak Homestays Ltd | Real estate | 2024 |
| Peak Influence Limited | Professional & scientific | 2026 |
| Peak Inks Limited | Professional & scientific | 2010 |
| Peak Lettings and Sales Ltd | Real estate | 2025 |
| Peak Media Marketing Ltd | Professional & scientific | 2024 |
| Peak Medical Practice Limited | Health & social care | 2010 |
| Peak Mortgage Services Limited | Financial services | 2009 |
| Peak Mushrooms Limited | Agriculture & fishing | 2024 |
| Peak Project Engineering Limited | Professional & scientific | 2006 |
| Peak Rail Limited | Transport & logistics | 1986 |
| Peak Railway Association Limited | Other services | 1998 |
| Peak Running C.I.C. | Arts & recreation | 2016 |
| Peak Surveys Ltd | Professional & scientific | 2020 |
| Peak TOR Training Ltd | Wholesale & retail | 2019 |
| Peak Tractors Limited | Professional & scientific | 2007 |
| Peak View Concrete Ltd | Manufacturing | 2024 |
| Peak Village Limited | Hospitality | 1996 |
| Peakepedals Ltd | Arts & recreation | 2024 |
| Peanut Internet Services Ltd | Information & communication | 2013 |
| Penny Black Catering Ltd | Hospitality | 2026 |
| Penny Black Private Office Limited | Real estate | 2018 |
| People Powered Change Ltd | Professional & scientific | 2020 |
| Percuro Psychology Ltd | Health & social care | 2024 |
| Perennial Solutions Limited | Professional & scientific | 2013 |
| Perfect Bound Limited | Hospitality | 2000 |
| Perspective AI Limited | Extraterritorial | 2015 |
| Pet Snacks Ltd | Wholesale & retail | 2023 |
| Petlock Ltd | Wholesale & retail | 2025 |
| Phoenix Independent Nurture Education Limited | Education | 2025 |
| Phoenix Tavinor Special Projects Ltd | Professional & scientific | 2014 |
| Pier House Bistro Limited | Hospitality | 2021 |
| Pilgrimaviationservices Ltd | Transport & logistics | 2025 |
| Pine Store Management Limited | Real estate | 2017 |
| Pinelodge Holidays Limited | Hospitality | 1985 |
| Pinelodge Limited | Extraterritorial | 1992 |
| Pinelog Limited | Manufacturing | 1991 |
| Pinelog Rentals Limited | Extraterritorial | 1991 |
| Pinelog Trustees Limited | Administrative & support | 2002 |
| PJ Carpentry Ltd | Construction | 2013 |
| Plaistow Hall Farm Cottages Limited | Real estate | 2021 |
| Planet Minimal Ltd | Wholesale & retail | 2018 |
| Planet Potential Limited | Administrative & support | 2008 |
| Platinum Creation Services Ltd | Information & communication | 2020 |
| Platypus Limited | Information & communication | 2011 |
| Playivity Ltd | Education | 2023 |
| Plus Design and Build Limited | Extraterritorial | 2009 |