| PB Electrical Contracting Limited | Professional & scientific | 2013 |
| PDL Gardening Services Limited | Administrative & support | 2021 |
| Peerhive Limited | Information & communication | 2020 |
| Pendennis & Co. Limited | Professional & scientific | 2019 |
| Peregrine Cars Ltd | Manufacturing | 2023 |
| Perimeter Security Maintenance & Technologies Limited | Administrative & support | 2009 |
| Pershaé Limited | Wholesale & retail | 2025 |
| Pesters Limited | Professional & scientific | 2005 |
| Peter Coote Ltd | Construction | 2019 |
| Peter James Electrical Ltd | Construction | 2013 |
| Petro Sosoiu Ltd | Transport & logistics | 2025 |
| Pets Intercontinental Limited | Wholesale & retail | 2025 |
| Pgac Builders Ltd | Construction | 2016 |
| PHP Gift and Baby Limited | Wholesale & retail | 2012 |
| PIA Plastering Services Ltd | Construction | 2025 |
| Pickle & RYE Incorporated Ltd | Hospitality | 2013 |
| Pilates With ZOE Limited | Other services | 2023 |
| Pilgrims Sales & Lettings (Byfleet) Ltd | Real estate | 2012 |
| Pilgrims Sales & Lettings Limited | Real estate | 1979 |
| Pink HAT Retail Limited | Manufacturing | 2023 |
| Pita Ltd | Real estate | 2023 |
| Pkgarage Ltd | Wholesale & retail | 2022 |
| Plan Mood Limited | Construction | 2021 |
| Planmood Property Limited | Real estate | 2024 |
| Plot 15 Management Company Limited | Households | 1991 |
| Pointing Digital Limited | Information & communication | 2021 |
| Poochy Pals Daycare Limited | Other services | 2023 |
| Porter Edwards Limited | Construction | 2025 |
| Portmore Commercial Services Limited | Real estate | 2007 |
| Praxis Product Solutions Ltd | Professional & scientific | 2025 |
| Precious Stones of Kenya | Arts & recreation | 2002 |
| Precision Performance Group Ltd | Professional & scientific | 2023 |
| Premasys Limited | Information & communication | 2017 |
| Premier Bespoke Carpentry Ltd | Manufacturing | 2011 |
| Premium Electricians Limited | Other services | 2015 |
| Prestige Cars of Pyrford Ltd | Wholesale & retail | 2021 |
| Preston Water Treatment & Facilities Services Limited | Professional & scientific | 2012 |
| Primalspeed Ltd | Information & communication | 2011 |
| Prime Administer Limited | Administrative & support | 1988 |
| Prime Placers Ltd | Administrative & support | 2025 |
| Primo IT Solutions Limited | Information & communication | 2014 |
| Primo Leadership Development Limited | Professional & scientific | 2021 |
| Professional Fabric Dyes Limited | Wholesale & retail | 2016 |
| Projects in Focus Ltd | Professional & scientific | 2018 |
| Property Holdings Surrey Ltd | Real estate | 2026 |
| Proxeama Ltd | Information & communication | 2025 |
| PTC Academy Limited | Education | 2024 |
| PTC Adventures Limited | Arts & recreation | 2022 |
| PTP Appliances Limited | Other services | 2018 |
| Pyrian Heath Management Company Limited | Households | 2005 |
| Qmin Removal Ltd | Transport & logistics | 2023 |
| Questio Financial Ltd | Professional & scientific | 2009 |
| R.F. International Limited | Professional & scientific | 1981 |
| R4MORTGAGES Ltd | Financial services | 2020 |
| R5 Energy Limited | Water & waste | 2024 |
| Raaa Holding Ltd | Financial services | 2025 |
| Rachel Green HR Ltd | Administrative & support | 2020 |
| Radiance by Alison Ltd | Other services | 2024 |
| Radishore Limited | Professional & scientific | 2008 |
| Radishore Projects Limited | Professional & scientific | 2022 |
| Rams Environmental Ltd | Water & waste | 2018 |
| Ranmore Ventures Limited | Real estate | 2024 |
| Rayman Building Services Limited | Construction | 2020 |
| Readymix Concrete Limited | Administrative & support | 2020 |
| Recycled Aggregates Limited | Construction | 2012 |
| Recycled Plant Hire Limited | Administrative & support | 2014 |
| Red Dragon Distribution Limited | Wholesale & retail | 2019 |
| Red Shed Limited | Hospitality | 2020 |
| Redfern Gardens Limited | Administrative & support | 2017 |
| Regency Digestive Health Ltd | Health & social care | 2025 |
| Regulus Advisory Limited | Financial services | 2025 |
| Relyt Media Limited | Professional & scientific | 2025 |
| Reset London Limited | Professional & scientific | 2019 |
| Revive Footcare Limited | Health & social care | 2018 |
| Richard & Son's Properties Ltd | Real estate | 2025 |
| Ride PTC Limited | Arts & recreation | 2012 |
| Rigbey & Sons Garden Services Ltd | Administrative & support | 2004 |
| Rimar Management Limited | Real estate | 2011 |
| Ripley Carriage Limited | Real estate | 1965 |
| Risecroft Consulting Ltd | Professional & scientific | 2017 |
| River Nene Properties Ltd | Real estate | 2020 |
| RJJ Holdings Limited | Construction | 2020 |
| RM Construction Limited | Construction | 2013 |
| RMC Southern Limited | Construction | 2022 |
| Rodeo Healthcare Limited | Health & social care | 2013 |
| Roger O'Beirne Plumbing Ltd Ltd | Construction | 2023 |
| Roman Tiles London Limited | Wholesale & retail | 2019 |
| Rora Labs Ltd | Information & communication | 2026 |
| Roseberry Coffee Outdoor Ltd | Wholesale & retail | 2024 |
| Rosemont DG Holdings Limited | Professional & scientific | 2024 |
| Roseyish Couture Ltd | Wholesale & retail | 2026 |
| RPS Company Services Limited | Construction | 2016 |
| RPS Estates Limited | Financial services | 2022 |
| RS Controls Ltd | Construction | 2018 |
| Rs&T Ltd | Administrative & support | 2012 |
| RSG Property Ltd | Real estate | 2019 |
| Ruech Limited | Wholesale & retail | 2021 |
| Rumo Advisory Limited | Professional & scientific | 2026 |
| S C Brickwork Contractors Ltd | Construction | 2022 |
| S T Control Services Limited | Administrative & support | 1994 |