| Prospect Heights Capital Limited | Financial services | 2019 |
| Prosper Consulting PM Ltd | Administrative & support | 2020 |
| Proudfoot Technology Management Limited | Professional & scientific | 2023 |
| Provantis Amenity Limited | Professional & scientific | 2002 |
| Provensys Limited | Information & communication | 2019 |
| Providence Marian Company | Administrative & support | 2009 |
| Providor (Safety) Ltd | Construction | 2007 |
| Proweld Mobile Welding Limited | Administrative & support | 2017 |
| Prowess Consulting Limited | Professional & scientific | 2021 |
| Prowess Marketing Ltd | Professional & scientific | 2022 |
| Pryor's Orchard Limited | Real estate | 1998 |
| PSC Transportation Ltd | Manufacturing | 2023 |
| PSC19 Ltd | Other services | 2022 |
| Pudding Lane Maintenance Limited | Construction | 2017 |
| Purdys Solicitors Limited | Professional & scientific | 2007 |
| Pure Balance Accounting Ltd | Professional & scientific | 2018 |
| Pure Balance Community Ltd | Extraterritorial | 2021 |
| Pure Balance Ltd | Extraterritorial | 2024 |
| Pure Balance Wellbeing Ltd | Extraterritorial | 2021 |
| Pure Capital Investments Ltd | Real estate | 2020 |
| Pure Living Accommodation Ltd | Real estate | 2018 |
| Pureair Ventilation Solutions Ltd | Construction | 2026 |
| Purfect Care Limited | Health & social care | 2025 |
| Purplextra Limited | Information & communication | 2021 |
| Purposerapid Property Management Limited | Households | 1995 |
| Purser Properties Limited | Real estate | 2010 |
| Purser Trading Limited | Wholesale & retail | 2024 |
| PW Car Consultants Limited | Wholesale & retail | 2013 |
| PWH Consulting Ltd | Professional & scientific | 2007 |
| QBD Property Ltd | Real estate | 2022 |
| QR Construction Services Ltd | Construction | 2024 |
| QRC Consultants Limited | Professional & scientific | 2011 |
| QRC Holdings Limited | Professional & scientific | 2020 |
| Qsxs (Qsxs) Ltd | Professional & scientific | 2016 |
| Quadrant Training Services Limited | Information & communication | 1988 |
| Quality Partner Ltd | Professional & scientific | 2015 |
| Quantum Totus Limited | Professional & scientific | 2023 |
| Queens Road Residents Management Company Limited | Households | 2003 |
| Queensway Race Developments Limited | Manufacturing | 2023 |
| Quinlivan Plumbing & Property Services Ltd | Construction | 2023 |
| Qxdesign Ltd | Professional & scientific | 2020 |
| R & a Shortland Exclusive Ltd | Administrative & support | 2018 |
| R & R Removals Ltd | Water & waste | 2024 |
| R and D (Printing Services) Limited | Manufacturing | 1975 |
| R Ransley Vehicle Renovations Limited | Wholesale & retail | 2010 |
| R.D. Haylock & SON Limited | Agriculture & fishing | 1950 |
| R.K. Print-Coat Instruments Limited | Manufacturing | 1963 |
| Rabs Groundworks Limited | Construction | 2025 |
| Racebikebitz Ltd | Wholesale & retail | 2009 |
| Racing Info and Advice Limited | Professional & scientific | 2019 |
| Radcliffe Securities Limited | Real estate | 2017 |
| Radnor House RTM Company Limited | Households | 2021 |
| Railway Curry Limited | Hospitality | 2018 |
| Rainbow Day Nursery (Bromley) Limited | Education | 2013 |
| Ramp 1 Aviation Ltd | Manufacturing | 2025 |
| Rand Contracting Limited | Agriculture & fishing | 2010 |
| Rand Logistics Group Ltd | Transport & logistics | 2025 |
| Randle Business Services Limited | Arts & recreation | 2010 |
| Rasa Sayang (Herts) Ltd | Hospitality | 2022 |
| Raspberry Bespoke Events Ltd | Arts & recreation | 2014 |
| Ratency Ltd | Administrative & support | 2023 |
| Raveley FEN Farms LLP | | 2016 |
| Rawlings Property Consulting Ltd | Real estate | 2011 |
| Rawlings Property Sales Ltd | Extraterritorial | 2013 |
| RB Properties & Consulting Limited | Hospitality | 2025 |
| RCD Plumbing & Heating Ltd | Construction | 2025 |
| RCO Property Management Limited | Real estate | 2024 |
| Re-Glass UK Ltd | Other services | 2019 |
| Recruit IT Forward Ltd | Administrative & support | 2020 |
| Rectory Farm Pirton Limited | Agriculture & fishing | 2017 |
| Rectory Hall Consultancy Limited | Real estate | 2015 |
| Red Box Self Storage Limited | Transport & logistics | 2008 |
| Red Hare Farm Ltd | Arts & recreation | 2023 |
| Red HEN Property Limited | Real estate | 2006 |
| Red Light Limited | Professional & scientific | 2016 |
| Redberry Inns Limited | Real estate | 2011 |
| Redbridge (UK) Limited | Wholesale & retail | 1997 |
| Redginga Ltd | Professional & scientific | 2023 |
| Redimension Ltd. | Information & communication | 2000 |
| Reforged Ltd | Information & communication | 2022 |
| Reguleight Ltd | Professional & scientific | 2015 |
| Rema Brokers Ltd | Financial services | 2024 |
| Remember Britain Limited | Wholesale & retail | 2011 |
| Remember Limited | Wholesale & retail | 2023 |
| Remily Ltd. | Information & communication | 2018 |
| Renascor Limited | Construction | 2023 |
| Reovum Ltd | Professional & scientific | 2021 |
| REP Advisors Ltd | Financial services | 2014 |
| Resample Limited | Manufacturing | 2013 |
| Rescapes Construction Ltd. | Construction | 2017 |
| Research & Product Consulting Ltd | Real estate | 2022 |
| Researchful Limited | Administrative & support | 2016 |
| Researchmind Limited | Information & communication | 2024 |
| Resilio Capital Partners Ltd | Professional & scientific | 2023 |
| Resolute Risk Management Ltd. | Administrative & support | 2015 |
| Retail Install Solutions Limited | Construction | 2014 |
| Retrofit Products Ltd | Wholesale & retail | 2022 |
| Reviva Composting Limited | Real estate | 2017 |
| Revivals Garage Ltd | Wholesale & retail | 2024 |
| Revive & Restore Pressure Washing Limited | Construction | 2019 |