| Power Transition Ltd | Information & communication | 2018 |
| PPP (2020) Limited | Real estate | 2020 |
| Practical Solutions Business Support Services Limited | Administrative & support | 2020 |
| Precis Ltd | Construction | 2022 |
| Precision Abrasives Ltd | Wholesale & retail | 2026 |
| Precision Access Ltd | Education | 2025 |
| Premier Flush Ltd | Administrative & support | 2024 |
| Prestige MS Cars Limited | Administrative & support | 2025 |
| Prestige Partnership Ltd | Wholesale & retail | 2025 |
| Prestige Transportation Dover Ltd. | Transport & logistics | 2023 |
| Preston Grange Property Management Ltd | Real estate | 2024 |
| Prima Commercial Services Limited | Construction | 2022 |
| Prima Fenestration Limited | Construction | 2022 |
| Prima Systems (South East) Limited | Construction | 1993 |
| Prima Systems Holding Company Limited | Financial services | 2025 |
| Prime Nexo Ltd | Wholesale & retail | 2026 |
| Primeexpo Solution Ltd | Administrative & support | 2025 |
| Primo Fightwear UK Ltd | Wholesale & retail | 2023 |
| Principal Driving UK Ltd | Transport & logistics | 2025 |
| Printcom.Co.Uk Limited | Manufacturing | 2005 |
| Priority Freight (Midlands) Limited | Transport & logistics | 1998 |
| Priority Freight Connexions Limited | Professional & scientific | 1999 |
| Priority Freight Holdings Limited | Financial services | 2013 |
| Priority Freight LHR Limited | Transport & logistics | 1996 |
| Priority Freight Limited | Transport & logistics | 1997 |
| Priority Worldwide Limited | Professional & scientific | 1999 |
| Priory (Folkestone Road) Management Limited | Households | 1988 |
| Pro Bati Ltd | Extraterritorial | 2024 |
| Product Dynamics Limited | Information & communication | 2024 |
| Project 75 Invest Ltd | Professional & scientific | 2024 |
| Prosanar Ltd | Wholesale & retail | 2019 |
| Proside Limited | Construction | 2013 |
| Prosper Agalmics, Inc. | | 2022 |
| Protea House Ltd | Real estate | 2021 |
| Protea Therapies Ltd | Other services | 2019 |
| Proton Maintenance Ltd | Construction | 2025 |
| PSM Recruitment Ltd | Administrative & support | 2024 |
| PT Publishing Limited | Information & communication | 2004 |
| Pulsion Location Ltd | Extraterritorial | 2023 |
| Puma IT Services Ltd | Information & communication | 2025 |
| Pumbah Ltd | Information & communication | 2024 |
| Pure Cleaning Group Limited | Administrative & support | 2018 |
| Purelife UK Natural Oils Ltd | Hospitality | 2018 |
| Purple Bamboo Ltd | Hospitality | 2025 |
| Purplestrings Consulting Ltd | Construction | 2014 |
| Qatramiz Rail Services Ltd | Construction | 2016 |
| QBH Solutions Ltd | Administrative & support | 2015 |
| Quadrant Consulting Services Limited | Information & communication | 2002 |
| Qualified Care Limited | Administrative & support | 2018 |
| Quality DRY Cleaners Dover Ltd | Other services | 2025 |
| Quanta Sales Limited | Wholesale & retail | 2023 |
| Quantivia Ltd | Other services | 2025 |
| Queens Gardens Management Company (Dover) Limited | Households | 2008 |
| Quirky Giftz Ltd | Wholesale & retail | 2010 |
| R C Claringbould & Sons Limited | Construction | 2005 |
| R C Property Enterprises Limited | Households | 2016 |
| R MCC Electrical Ltd | Construction | 2024 |
| R&B Engineering Limited | Manufacturing | 2004 |
| R&B South Limited | Professional & scientific | 2013 |
| R&D Holdings Limited | Real estate | 2024 |
| Raasa Restaurants Limited | Hospitality | 2025 |
| RAD Property Maintenance Ltd | Construction | 2023 |
| Radley's Aesthetics Limited | Professional & scientific | 2023 |
| Rail Construction Limited | Manufacturing | 2025 |
| Railtrad Ltd | Information & communication | 2026 |
| Railway Methods Ltd | Manufacturing | 2025 |
| Rainbow Nation Bar Ltd | Hospitality | 2026 |
| Ramazzi Invest Ltd | Extraterritorial | 2025 |
| Ramazzi Ltd | Extraterritorial | 2025 |
| Ramsden Kent LLP | | 2024 |
| Rapid Tackle Ltd | Agriculture & fishing | 2020 |
| Ratpack Alliance Limited | Information & communication | 2024 |
| RAY Cutts Marine Services Ltd | Other services | 2024 |
| Raysun Renewables Ltd | Construction | 2026 |
| RB Recycling Invest Ltd | Extraterritorial | 2025 |
| RB Recycling Ltd | Extraterritorial | 2025 |
| RC Plumbing and Heating Solutions Limited | Construction | 2025 |
| Rdph Limited | Professional & scientific | 2019 |
| Reactive Retreat Limited | Arts & recreation | 2025 |
| Readyshare Property Management Ltd | Extraterritorial | 1988 |
| Realives Films Ltd | Arts & recreation | 2025 |
| Rebecca Brace Editorial Limited | Information & communication | 2012 |
| Rebels Coffee & Sauna Ltd | Hospitality | 2025 |
| Recbox AI Limited | Information & communication | 2023 |
| Reclamet ( Holdings ) Limited | Wholesale & retail | 2020 |
| Reclamet Auction Services Ltd | Water & waste | 2019 |
| Reclamet Parts Limited | Water & waste | 2013 |
| Red Balloon Construction Ltd | Construction | 2021 |
| Red Lion Dover Ltd | Hospitality | 2024 |
| Red Lion Estate Residents Association Limited | Households | 1965 |
| Red Robin Farm Limited | Agriculture & fishing | 2022 |
| Red Rose Fire Solutions Ltd | Public administration | 2019 |
| Red Vape Shop Ltd | Wholesale & retail | 2026 |
| Redeemed Christian Church of GOD: Holy Ghost Zone Canterbury | Other services | 2025 |
| Reed Recovery & Repair Limited | Wholesale & retail | 2019 |
| Regal Nails & Beauty Limited | Other services | 2024 |
| Rehoboth Continental Limited | Manufacturing | 2010 |
| Rehoboth Renovations Ltd | Construction | 2026 |
| Relm Plumbing and Heating Ltd | Construction | 2011 |
| Relyon Van Hire Limited | Administrative & support | 2026 |