| Prior Wealth Management Ltd | Financial services | 2026 |
| Priority First Group Limited | Administrative & support | 2021 |
| Pro Club Projects Limited | Arts & recreation | 2016 |
| Pro Mana Ltd | Professional & scientific | 2023 |
| Probis Services Limited | Professional & scientific | 1988 |
| Problempc.Co.Uk Limited | Extraterritorial | 2007 |
| Probuild Renovations Ltd | Construction | 2025 |
| Productivity Finance Ltd | Financial services | 2017 |
| Products of Change Alliance Ltd | Other services | 2025 |
| Products of Change Ltd | Professional & scientific | 2019 |
| Products of Change Media Ltd | Administrative & support | 2020 |
| Products of Change Old Ltd | Other services | 2023 |
| Professional Tailoring & Alteration Ltd | Administrative & support | 2017 |
| Progas Letting Solutions Limited | Construction | 2013 |
| Project 159 Ltd | Administrative & support | 2022 |
| Project 261 Ltd | Professional & scientific | 2011 |
| Project and Programme Delivery Services Limited | Information & communication | 2022 |
| Project ME ME ME Ltd | Education | 2023 |
| PROJECT5 Design Ltd | Construction | 2021 |
| Project: Blinds Limited | Administrative & support | 2016 |
| Projective Group Holdings Limited | Financial services | 2024 |
| Projective Holdco 1 Limited | Financial services | 2024 |
| Projective Holdings Ltd | Financial services | 2019 |
| Projective Limited | Information & communication | 1998 |
| Promo Solutions Limited | Administrative & support | 2007 |
| Pronaos Limited | Professional & scientific | 2014 |
| Property FOX Ltd | Construction | 2015 |
| Proptechinvest Ltd | Real estate | 2022 |
| Protocol Buddy Limited | Information & communication | 2025 |
| Psg-Group Services Ltd | Professional & scientific | 2015 |
| PSM Commercial Services Ltd | Professional & scientific | 2025 |
| PTP Consulting Ltd | Information & communication | 2026 |
| PUB Governing Body Ltd | Administrative & support | 2010 |
| Pull Down BED Ltd | Manufacturing | 2024 |
| Pulse Sport Recruitment Limited | Administrative & support | 2026 |
| Pure Hydration (Leisure) Limited | Wholesale & retail | 2023 |
| Pure Hydration Technologies Limited | Wholesale & retail | 2025 |
| Purest Press Limited | Information & communication | 2025 |
| Q1 Building (Reading) RTM Company Ltd | Households | 2019 |
| Q2 (Reading) Management Company Limited | Households | 2008 |
| Qore Enterprises Ltd | Information & communication | 2020 |
| Quantios (UK) Limited | Information & communication | 1986 |
| Quantios FS (UK) Limited | Information & communication | 1996 |
| Quantios Ltd | Other services | 2019 |
| Quantios Management Services Limited | Information & communication | 2017 |
| Quantios Solutions (UK) Limited | Information & communication | 1978 |
| Queensgate (Farnborough) Residents Estate Management Company Ltd | Households | 2025 |
| Queensgate Farnborough Residents Management Company Limited | Households | 2013 |
| Querre Limited | Administrative & support | 2014 |
| QUICK9 Ltd | Information & communication | 2016 |
| Quinset Consulting Limited | Information & communication | 2023 |
| Qunix Infrastructure Limited | Construction | 2025 |
| QXA Limited | Professional & scientific | 2009 |
| R & H Sales Agencies Limited | Wholesale & retail | 2003 |
| R Gray Plumbing and Heating Ltd | Construction | 2021 |
| R H Brickwork Limited | Construction | 2006 |
| R N C Consulting Ltd | Professional & scientific | 2026 |
| R Pringle Construction and Cleaning Ltd | Construction | 2019 |
| R&A Painting and Decorating Ltd | Construction | 2026 |
| R.G. Investment Management Ltd | Real estate | 1991 |
| R.S. IT Support Limited | Information & communication | 2024 |
| R14 Beats Ltd | Information & communication | 2023 |
| RA Logistics Consultants Limited | Professional & scientific | 2024 |
| RA Property Investments Limited | Real estate | 2006 |
| Raavanan Companies Ltd | Wholesale & retail | 2024 |
| Rabbid Tuning Limited | Information & communication | 2015 |
| Rachel Ellis Counselling Limited | Other services | 2014 |
| Radar Sustainable Procurement Ltd | Wholesale & retail | 2025 |
| Raman Pharma Limited | Wholesale & retail | 2014 |
| Rankov Brilliance Solutions Ltd | Administrative & support | 2023 |
| Rankov Properties Ltd | Real estate | 2023 |
| Rare Savage Limited | Wholesale & retail | 2023 |
| RAT Construction Limited | Construction | 2017 |
| Ravreet Limited | Real estate | 2016 |
| RAY Fletcher Services Limited | Construction | 2025 |
| Raylamb Coaching Ltd | Professional & scientific | 2024 |
| Raylute Limited | Real estate | 1989 |
| Raylute Residential Limited | Real estate | 2018 |
| RB Housekeeping Limited | Administrative & support | 2025 |
| RCM Investments Limited | Wholesale & retail | 2013 |
| RDS Financial Solutions Limited | Administrative & support | 2021 |
| Realise Engineering Ltd | Professional & scientific | 2021 |
| Recruit to Retain Limited | Professional & scientific | 2005 |
| Red Loom Ltd. | Professional & scientific | 2015 |
| Redfernstars Limited | Arts & recreation | 2017 |
| Redirect Sales Solutions Ltd | Professional & scientific | 2024 |
| Redloh Transport (Consultancy) Services Ltd | Professional & scientific | 2022 |
| Redop Properties Limited | Real estate | 2024 |
| Redwood Holdco Limited | Other services | 2019 |
| Redwood Midco 1 Limited | Other services | 2019 |
| Redwood Midco 2 Limited | Other services | 2019 |
| Regent Court (Fleet) Management Company Limited | Households | 1981 |
| Regent Property Renovation and Restyle Limited | Construction | 2017 |
| Regent Property Services Ltd | Construction | 2024 |
| Regent Yachts Ltd | Professional & scientific | 2010 |
| Regis Corporate Services Limited | Professional & scientific | 1999 |
| Reina Consulting Ltd | Professional & scientific | 2021 |
| Relay Publishing Ltd | Information & communication | 2014 |
| Rennlens Limited | Wholesale & retail | 2024 |
| RES Advice Ltd | Extraterritorial | 2010 |