| Peekaboo Films Ltd | Information & communication | 2018 |
| Peerage Properties Limited | Construction | 1980 |
| Pembury Limited | Professional & scientific | 2006 |
| Peregrino Group Limited | Financial services | 2025 |
| Performance Coaching International Ltd | Education | 2001 |
| Personalised Sports Products Limited | Wholesale & retail | 2023 |
| Pestforce East London Limited | Administrative & support | 2015 |
| Peter the Tiler Limited | Construction | 2003 |
| Pgfpolicy Ltd | Financial services | 2016 |
| Phoenix Wills Services Ltd | Other services | 2020 |
| Picton House Properties Ltd | Real estate | 1966 |
| Pillarhouse International Limited | Manufacturing | 1975 |
| Pink Momentum Ltd | Information & communication | 2025 |
| Pistyll Rhaeadr Limited | Hospitality | 2025 |
| Plant Risk Services Limited | Professional & scientific | 2004 |
| Playmaker Sports Group Ltd | Professional & scientific | 2023 |
| Plush India Ltd | Arts & recreation | 2010 |
| Ponsford Properties Limited | Construction | 1999 |
| Portview Homes Limited | Construction | 2002 |
| Practical Resourcing Solutions Limited | Administrative & support | 2012 |
| Premier CIO Services Limited | Information & communication | 2013 |
| Premium Construction Services Ltd | Construction | 2026 |
| Premium Dispense Limited | Professional & scientific | 2024 |
| Premium M & E Services Ltd | Construction | 2025 |
| Prestige Vending Limited | Administrative & support | 2007 |
| Priest Property Consultants Ltd | Hospitality | 2020 |
| Priest Property Consults Ltd | Professional & scientific | 2021 |
| Priest Property Rentals Ltd | Real estate | 2023 |
| Prime-Flow Drainage & Plumbing Services Limited | Construction | 2022 |
| Primer Group Contractors Ltd | Construction | 2024 |
| Pristine Finance LLP | | 2023 |
| Progressive Homes Limited | Construction | 2005 |
| Prorepair Services Limited | Administrative & support | 2026 |
| Pump’D Gym Management Ltd | Arts & recreation | 2025 |
| Purple Rock Limited | Professional & scientific | 2003 |
| Putney & Wood Contracts Limited | Construction | 2022 |
| PWI Residual (Incorporated) | Other services | 2025 |
| Pyrodec Ltd | Construction | 2010 |
| QI Tuition Ltd | Education | 2022 |
| Quality & Compliance Solutions Ltd | Professional & scientific | 2018 |
| Quillspire Ltd | Information & communication | 2023 |
| R J F Property Services Ltd | Construction | 2005 |
| R. Hurst and Company Limited | Wholesale & retail | 1992 |
| R.M Books Ltd | Information & communication | 2023 |
| R2 Management Ltd | Hospitality | 2015 |
| R3 Holdings Limited | Financial services | 2011 |
| R3 Property Services Limited | Real estate | 1993 |
| Rabar Property Limited | Real estate | 1986 |
| Radley Green Equestrian Limited | Arts & recreation | 2023 |
| Radley Green Farm Limited | Agriculture & fishing | 2006 |
| Radley Green London Ltd | Construction | 2025 |
| Railway Engineering Institution (Incorporated) | Other services | 1908 |
| Raising Willow Limited | Wholesale & retail | 2025 |
| Ramsey Rents Limited | Real estate | 2023 |
| RAN Whitbread Ltd | Professional & scientific | 2024 |
| Rapi-Cad Design Limited | Information & communication | 1994 |
| Raptor Refrigeration Ltd | Administrative & support | 2024 |
| Rattan Warehouse Trade Limited | Wholesale & retail | 2020 |
| Ravens Bakery (Essex) Limited | Manufacturing | 2017 |
| RCM Homes Ltd | Households | 2025 |
| Re-Lay Limited | Construction | 2001 |
| Red Box Boilers Ltd | Manufacturing | 2025 |
| Red Lightning Properties Limited | Real estate | 2021 |
| Redlynn Limited | Professional & scientific | 1994 |
| Refurb Partners Ltd | Real estate | 2023 |
| Reginald Properties Ltd | Real estate | 2024 |
| Remus Memorial Horse Sanctuary | Agriculture & fishing | 2009 |
| Renoun Workforce Services Ltd | Professional & scientific | 2026 |
| Repka Limited | Wholesale & retail | 2020 |
| Representation X Limited | Extraterritorial | 2024 |
| Reset Cryotherapy Essex Ltd | Health & social care | 2018 |
| Residents Management (NO.33) Limited | Households | 1985 |
| Resource Code Ltd | Information & communication | 2009 |
| Review Hotels Limited | Hospitality | 1981 |
| Revolution Power Limited | Energy | 2023 |
| Rgbn Property 1 Ltd | Real estate | 2023 |
| Richardson Landscapes Limited | Administrative & support | 2007 |
| Rinet Consultants Ltd | Construction | 2012 |
| Ringlet Therapeutics Ltd | Professional & scientific | 2024 |
| Rite Recruit Limited | Administrative & support | 2008 |
| Rivas Property Co. Limited | Real estate | 1991 |
| RJ Drylining Limited | Construction | 2015 |
| RJ Fire Protection Ltd | Construction | 2024 |
| RMA Home Ware Ltd | Wholesale & retail | 2018 |
| ROD Jarman Associates Limited | Administrative & support | 2010 |
| Roman Road Hospitality Limited | Extraterritorial | 2015 |
| Roman Road Properties Limited | Real estate | 2015 |
| Route 30 Limited | Professional & scientific | 2001 |
| Rowhedge Limited | Construction | 2020 |
| Rttec Limited | Information & communication | 2016 |
| Runlux Homes Ltd | Hospitality | 2023 |
| Rushmoore Roofing Limited | Construction | 2024 |
| S J Upton Farms Limited | Agriculture & fishing | 2006 |
| S.M. Surgery Ltd. | Health & social care | 2015 |
| Sable Lion Holdings Limited | Financial services | 2026 |
| SAC Contracts Limited | Administrative & support | 2005 |
| Safety Conformance Solutions Ltd | Administrative & support | 2023 |
| Salt Group Ltd | Information & communication | 2018 |
| Salter &SON Limited | Construction | 1958 |
| Same Day, Next Day Steel Limited | Extraterritorial | 2009 |