| Pinewood Studios Limited | Information & communication | 1945 |
| Pinnerland Property Limited | Real estate | 2022 |
| Pipi PUB Company Limited | Hospitality | 2023 |
| Pistachio Transport Limited | Hospitality | 2024 |
| Planet Engineering Services Limited | Manufacturing | 2021 |
| Plaskett Property Services Ltd | Construction | 2012 |
| Platinum Roofing Services Ltd | Construction | 2026 |
| PM Tech-Weld Ltd | Manufacturing | 2024 |
| PMV Consultancy Limited | Professional & scientific | 2013 |
| Point Haulage Ltd | Transport & logistics | 2024 |
| Pokhara Limited | Health & social care | 2020 |
| Posx Ltd | Administrative & support | 2017 |
| Potters Management Company Limited | Households | 2011 |
| PR Kapoor Property Limited | Real estate | 2023 |
| Practicality Brown(Horticulture) Ltd | Administrative & support | 2018 |
| Pragmus Consulting Ltd | Information & communication | 2017 |
| Preloft Limited | Wholesale & retail | 2025 |
| Premium Chauffeurs Services Ltd | Other services | 2022 |
| Prestige & Performance Cars Limited | Wholesale & retail | 1996 |
| Prestige Prime Holdings Ltd | Wholesale & retail | 2025 |
| Pretty Perfect London Ltd | Wholesale & retail | 2018 |
| Prodigal Home Developments (PHD) Ltd | Real estate | 2016 |
| Proof-It Ltd | Construction | 2019 |
| Property NO. 6 Ltd | Real estate | 2016 |
| Property Ventures AD Ltd | Real estate | 2026 |
| Proretro Limited | Construction | 2025 |
| Provident Properties LLP | | 2012 |
| PS Bajwa Construction Ltd | Construction | 2019 |
| PSG Consultancies Limited | Construction | 2014 |
| PSL Consulting Limited | Professional & scientific | 2013 |
| Puffology Ltd | Hospitality | 2025 |
| Pulcha Ltd | Wholesale & retail | 2025 |
| Pulsar Logistics Limited | Transport & logistics | 2018 |
| Pump and Water Management Services Ltd | Professional & scientific | 2008 |
| Purple Hands Limited | Other services | 2017 |
| Pyramid International Ltd | Education | 2021 |
| Qorebuild Limited | Construction | 2025 |
| Quality Clefts Limited | Wholesale & retail | 2022 |
| Qālabyriya Ltd | Arts & recreation | 2025 |
| R3 & SON Ltd | Hospitality | 2012 |
| R3DEFINED Coaching Ltd | Other services | 2024 |
| RAI Consulting Ltd | Health & social care | 2005 |
| RAI Property Acquisitions Limited | Real estate | 2018 |
| Rainberg Investments Limited | Real estate | 2025 |
| RAM Technical Solutions Ltd | Professional & scientific | 2022 |
| Ramp Garage Ltd | Wholesale & retail | 2019 |
| Rand Legal Ltd | Professional & scientific | 2022 |
| Rapid PS Ltd | Real estate | 2020 |
| Ravensgate (Angmering) Limited | Construction | 2011 |
| Ravensgate (Chiswick) Limited | Administrative & support | 2014 |
| Ravensgate Developments Limited | Real estate | 2010 |
| Ravensgate London Colney Limited | Administrative & support | 2016 |
| RAW Power Services Ltd | Manufacturing | 2025 |
| Rawfreight Ltd | Transport & logistics | 2025 |
| Rawlings Flooring Ltd | Construction | 2006 |
| RC Dowling Ltd | Construction | 2007 |
| Re-Aligned Ltd | Arts & recreation | 2025 |
| Reda's Beauty & Aesthetics Ltd | Other services | 2018 |
| Redline Prestige & Performance Ltd | Wholesale & retail | 2017 |
| Redraw Leisure Ltd | Hospitality | 2019 |
| Reel Precision Cutting Ltd | Manufacturing | 2025 |
| Reel to Wheel Ltd | Wholesale & retail | 2025 |
| Regal Residential Rentals Ltd | Real estate | 2025 |
| Rehana Agpro Imports Ltd | Wholesale & retail | 2020 |
| Renovaré Projects Ltd | Real estate | 2019 |
| Renovation and Construction Solutions Limited | Administrative & support | 2019 |
| Resin Bound Heating Limited | Construction | 2024 |
| Retra Holdings Limited | Professional & scientific | 2006 |
| Revive Property Renovations Limited | Real estate | 2025 |
| Richard Dodd Place Freehold Limited | Real estate | 2009 |
| Richer Walls Ltd | Construction | 2026 |
| Riching Properties Limited | Real estate | 2015 |
| Richings Building Services Limited | Construction | 2024 |
| Richings Park Golf Limited | Arts & recreation | 2003 |
| Richings Park Ltd | Hospitality | 2025 |
| Richings Park Services Ltd | Professional & scientific | 2023 |
| Richings Park Sports Club Limited | Arts & recreation | 1946 |
| Richings Place Management Company Limited | Households | 2003 |
| Richmond Assets (Oxford) Limited | Construction | 2009 |
| Rickford Holdings Ltd | Financial services | 2024 |
| Rightforce Ltd | Wholesale & retail | 2021 |
| Rightforce Properties Limited | Real estate | 2024 |
| Rika Hospitality Ltd | Hospitality | 2018 |
| Rimi Surge Limited | Wholesale & retail | 2022 |
| Riran Properties Limited | Real estate | 2025 |
| RJ Amoth Ltd | Real estate | 2026 |
| RJ Bajpai Limited | Real estate | 2023 |
| RJK Investments Limited | Real estate | 2020 |
| RJN Chemicals Limited | Wholesale & retail | 2001 |
| Rksh Ltd | Construction | 2025 |
| RLD Capital Limited | Financial services | 2019 |
| Rmbestcare Ltd | Health & social care | 2022 |
| Rmehrotra Consulting Limited | Information & communication | 2014 |
| Roadx Logistics Limited | Transport & logistics | 2021 |
| Robertson Business Park Ltd | Real estate | 2023 |
| Roda Capital Ltd | Real estate | 2021 |
| Roeen & Ismat Properties Ltd | Wholesale & retail | 2026 |
| RON Enterprise Ltd | Financial services | 2023 |
| Roobarb PUB Company Limited | Hospitality | 2022 |
| Rooftop Developments London Limited | Construction | 2017 |