| Portland Stone Products Limited | Wholesale & retail | 2002 |
| Portland Stone Quarries Limited | Extraterritorial | 2011 |
| Portland Tithes Limited | Real estate | 2023 |
| Portofino Poole Limited | Hospitality | 2018 |
| Portus Properties Ltd | Real estate | 2024 |
| Positive Change SW Limited | Education | 2019 |
| Possum Source Limited | Wholesale & retail | 2023 |
| Potwallopers Limited | Hospitality | 2008 |
| Poundbury Pilates Limited | Arts & recreation | 2016 |
| Powdac Limited | Professional & scientific | 2014 |
| Power Clean Limited | Administrative & support | 2013 |
| Powerflow Exhausts (UK) Limited | Extraterritorial | 2018 |
| Prabh.Shop Ltd | Wholesale & retail | 2026 |
| Precision Engineering CNC Limited | Professional & scientific | 2026 |
| Predictive Trends Ltd | Professional & scientific | 2024 |
| Premier Cleaning Solutions Limited | Administrative & support | 2013 |
| Premier Gas-Electrical Limited | Construction | 2003 |
| Premier Touring Ltd | Arts & recreation | 2004 |
| Prestige Business Solutions (UK) Limited | Professional & scientific | 2014 |
| Prestige Roofing & Leadwork Ltd | Construction | 2019 |
| Preston Engineering Limited | Wholesale & retail | 2024 |
| Preston PRE School Limited | Education | 2012 |
| Preston Regis Ltd | Wholesale & retail | 2017 |
| Pretty Bland Limited | Extraterritorial | 2016 |
| Pretty Creative Customs Limited | Wholesale & retail | 2021 |
| Pretty Nifty Electrical Services Ltd | Construction | 2018 |
| Pretty Nifty Marine Limited | Professional & scientific | 2009 |
| Prevent South Limited | Construction | 2025 |
| Priestley Aerospace Ltd | Extraterritorial | 2022 |
| Prime Plumb Limited | Construction | 2025 |
| Prime Pure Limited | Other services | 2024 |
| Pritchpsd Ltd | Information & communication | 2025 |
| PRM Solutions SW Limited | Public administration | 2014 |
| Pro-Group Scaffolding Dorset Limited | Construction | 2026 |
| Procure Services (UK) Ltd | Professional & scientific | 2022 |
| Procurement Transformation Contracting Ltd | Professional & scientific | 2013 |
| Professional Project Support Limited | Construction | 1998 |
| Programme Delivery Support Limited | Public administration | 2018 |
| Project Solutions Design & Build Ltd | Construction | 2007 |
| Propa Roofing Products Limited | Professional & scientific | 2016 |
| Proper TS Ventures Ltd | Real estate | 2020 |
| Property Care International (Holdings) Limited | Administrative & support | 1998 |
| Property Care International Limited | Administrative & support | 1990 |
| Property Development and Investment Finance Limited | Financial services | 2003 |
| Property Inspired Limited | Real estate | 2023 |
| Property Management Cumbria Limited | Real estate | 2026 |
| Property Sunshine Limited | Real estate | 2024 |
| Property Vission Limited | Construction | 2023 |
| PROPERTY21 Limited | Real estate | 2016 |
| Prospace Consulting Ltd | Agriculture & fishing | 2003 |
| Prosperitas Property Ltd | Real estate | 2025 |
| Proton Technology Limited | Information & communication | 1995 |
| Prototype Components Limited | Manufacturing | 2012 |
| PS & BC Limited | Other services | 2016 |
| PS Plastics Ltd | Administrative & support | 2016 |
| PSR Property Consultant Limited | Real estate | 2024 |
| Pulse Fitness Plus Ltd | Arts & recreation | 2025 |
| Purnell Snell Building Limited | Construction | 2011 |
| Puyfc Limited | Arts & recreation | 2013 |
| PWF Developments Ltd | Real estate | 2017 |
| PYE Hill Electrical Limited | Construction | 2000 |
| Pyramid Football Club Ltd | Arts & recreation | 2025 |
| Pyxage Ltd | Wholesale & retail | 2018 |
| Qatestlab Limited | Information & communication | 2018 |
| QK Property Ltd | Hospitality | 2026 |
| Quay Healthcare Limited | Construction | 1992 |
| Quay View Holidays Ltd | Hospitality | 2021 |
| Quayside Fuel LLP | | 2002 |
| Quayside Quarters Weymouth Ltd | Hospitality | 2024 |
| Queen of Hearts (Weymouth) Limited | Wholesale & retail | 2020 |
| Quepal Limited | Professional & scientific | 2015 |
| Quiddles Limited | Hospitality | 2014 |
| Quilty Publishing Limited | Information & communication | 2013 |
| Quinn Fisheries Limited | Agriculture & fishing | 2018 |
| Quintre Ltd | Hospitality | 2022 |
| QY Properties Limited | Real estate | 2026 |
| R & D Decorating South West Limited | Construction | 2013 |
| R & G Fishing Limited | Agriculture & fishing | 2016 |
| R a Aviation Ltd | Public administration | 2009 |
| R Hotels (Group) Limited | Hospitality | 2022 |
| R Lawrence Building Limited | Construction | 2026 |
| R Pearce Transport Ltd | Transport & logistics | 2026 |
| R Property Dorset Limited | Real estate | 2023 |
| R Squared Cleaning Ltd | Administrative & support | 2024 |
| R T Raynsford Carpentry & Building Ltd | Construction | 2007 |
| R Tomlin Ltd | Health & social care | 2022 |
| R&D Clean Ltd | Administrative & support | 2021 |
| R&E Construction Ltd | Construction | 2020 |
| R, S & L Property Ltd | Real estate | 2025 |
| R. Boyle Plumbing and Heating Limited | Construction | 1999 |
| R. Gould Services Limited | Wholesale & retail | 2025 |
| R. H. Patterson & SON Limited | Administrative & support | 2000 |
| R. Lawrence General Building Limited | Construction | 2015 |
| R.D Fibreglass Ltd | Manufacturing | 2023 |
| Race Products Dorset Limited | Manufacturing | 2021 |
| Radar Domes Limited | Manufacturing | 2017 |
| Raddison Bespoke Garden Buildings Limited | Construction | 2022 |
| Radialaura Ltd | Manufacturing | 2025 |
| Radio H-P Limited | Wholesale & retail | 2019 |
| Radley Court (Weymouth) Ltd | Hospitality | 2005 |