| Probuild Dorset Ltd | Construction | 2023 |
| Professional Awarding Qualifications Ltd | Education | 2022 |
| Professional Engineering Matters Limited | Professional & scientific | 2001 |
| Profile Hair Design Limited | Other services | 2018 |
| Project 3B Ltd. | Real estate | 2018 |
| Project Approval Limited | Administrative & support | 2005 |
| Promax Performance Ltd | Manufacturing | 2023 |
| Promovate Ltd | Other services | 2021 |
| Proof of Vision Limited | Information & communication | 2024 |
| Prop Dead Gorgeous Ltd | Extraterritorial | 2010 |
| Propeller Capital Ltd | Administrative & support | 2020 |
| Propeller Recruitment Limited | Administrative & support | 2010 |
| Property Investment Club Ltd | Real estate | 2002 |
| Property Wellbeing Ltd | Households | 2018 |
| Prorsum Consulting Limited | Professional & scientific | 2022 |
| Prospect Business Park Management Company (Swanage) Ltd | Real estate | 2010 |
| Proteus Occupational Medicine Services Limited | Health & social care | 2018 |
| Prototype Electronics Ltd | Manufacturing | 2010 |
| Published Word Ltd | Information & communication | 2007 |
| Puddle Terrace Ltd | Water & waste | 2017 |
| Pulham Management Limited | Other services | 2003 |
| Pulham Steels Limited | Wholesale & retail | 1995 |
| Punchdrunk Productions Limited | Information & communication | 2008 |
| Punjabi Transport Limited | Other services | 2014 |
| Puppy Paddock Ltd | Agriculture & fishing | 2025 |
| Pupr Ltd | Information & communication | 2019 |
| Purbeck Thatching & Restoration Ltd | Construction | 2022 |
| Pure Spain Limited | Wholesale & retail | 2018 |
| Pure Vines Limited | Wholesale & retail | 2024 |
| Purple Business Services Ltd | Professional & scientific | 2022 |
| Purple Sail Designs Ltd | Professional & scientific | 2025 |
| Purposeful.Tech Ltd | Administrative & support | 2023 |
| PVN Consulting Limited | Professional & scientific | 2010 |
| PWL Holdings Limited | Financial services | 2018 |
| Pymore Island Mill Management Limited | Real estate | 2009 |
| Pyropure Limited | Administrative & support | 2009 |
| Qiu-Care Limited | Health & social care | 2012 |
| Quadra Software Limited | Information & communication | 2019 |
| Quality Art Reproductions Limited | Manufacturing | 2002 |
| Quarternote Productions Ltd | Professional & scientific | 2003 |
| Quartz Computing Limited | Information & communication | 1986 |
| Quayside (Weymouth) Management Company Limited | Households | 1998 |
| Queens Park (Dorchester) Management Company Limited | Households | 2010 |
| Querysum Limited | Information & communication | 2007 |
| Quicksnap Rentals Limited | Administrative & support | 2025 |
| Quigley Consulting Limited | Professional & scientific | 2022 |
| Quoin Country House Management Ltd | Real estate | 2018 |
| Qwikfast Trade & DIY Supplies Limited | Construction | 2013 |
| R & H Bars Ltd | Hospitality | 2013 |
| R & R B S Ltd | Construction | 2021 |
| R and J Trevor Limited | Agriculture & fishing | 1972 |
| R C Consultants Ltd | Professional & scientific | 2006 |
| R Hidari Developments Limited | Extraterritorial | 1997 |
| R K Management Solutions Limited | Construction | 2019 |
| R Knight Fencing & Groundworks Ltd | Construction | 2026 |
| R M Brewer, Manager | | 2008 |
| R&M Properties Private Limited | Real estate | 2025 |
| R&S Turner Limited | Agriculture & fishing | 2004 |
| R. Hawkins Limited | Health & social care | 2003 |
| R. J. Drake Ltd. | Construction | 2011 |
| R. J. Head (Dorset) Limited | Agriculture & fishing | 2013 |
| R.J. King (Insurance Brokers) Limited | Financial services | 1972 |
| R.J. Smith 2003 Limited | Manufacturing | 2003 |
| R2 Electrical Ltd | Construction | 2021 |
| Radent Ltd | Administrative & support | 2019 |
| Radford Wilson Limited | Professional & scientific | 2013 |
| Radiance, Health and Aesthetics by Jill Limited | Other services | 2022 |
| Radiology Imaging Limited | Health & social care | 2015 |
| Rainbow Garage (Winfrith) Limited | Wholesale & retail | 1965 |
| RAK Architecture Ltd | Professional & scientific | 2013 |
| RAM Bookkeeping Services Limited | Professional & scientific | 2025 |
| RAM Transcreation Services Ltd | Arts & recreation | 2024 |
| Rampisham Garage Limited | Wholesale & retail | 2016 |
| Rampisham Manor Farms Limited | Agriculture & fishing | 1974 |
| Ranmore Law Ltd | Professional & scientific | 2023 |
| Rapid 4245 Limited | Professional & scientific | 1987 |
| Rapid ROD Drainage Ltd | Water & waste | 2026 |
| Rascal Ventures Ltd | Information & communication | 2021 |
| Raven Network Services Ltd | Information & communication | 2016 |
| RAW Media Limited | Professional & scientific | 1998 |
| Razmatazz Geek Merchandise Limited | Wholesale & retail | 2017 |
| RBA (2002) Limited | Professional & scientific | 2003 |
| RCL Consultancy Limited | Real estate | 2026 |
| RD Advisory Limited | Professional & scientific | 2025 |
| RD Builders Dorset Limited | Construction | 2020 |
| RDP Architects Limited | Professional & scientific | 2006 |
| Re-Retail Limited | Wholesale & retail | 2009 |
| Read Residential Limited | Real estate | 2017 |
| Ready to Burn Ltd | Agriculture & fishing | 2021 |
| Real Estate Project Solutions Ltd. | Professional & scientific | 2009 |
| Real Recruitment Limited | Administrative & support | 2001 |
| Really Good TOO Limited | Information & communication | 2014 |
| Rebecca Shaw Estate Limited | Arts & recreation | 2015 |
| Reconnection Dorchester CIC | Hospitality | 2025 |
| Rectory Capital Ltd | Households | 2026 |
| Rectory Close Management Company Limited | Households | 2017 |
| Rectory Gardens (Cattistock) Management Company Limited | Administrative & support | 2011 |
| Redditch Dental Care Ltd | Health & social care | 2021 |
| Reddome Ltd | Information & communication | 2024 |
| Redefine Poundbury Ltd | Other services | 2018 |