| Pallmall Communications Ltd | Professional & scientific | 2014 |
| PAN Asia Box Limited | Hospitality | 2019 |
| Paolo Collauto Limited | Professional & scientific | 2011 |
| Paper Project Architecture and Design Limited | Professional & scientific | 2004 |
| Paramount Motors Ltd | Wholesale & retail | 2018 |
| Pathway to Property Ltd | Real estate | 2020 |
| PC 4 YOU Limited | Information & communication | 2014 |
| PDS Promotions Limited | Professional & scientific | 2008 |
| Pega Analytics Limited | Information & communication | 2015 |
| Pegasus Management (UK) Limited | Real estate | 2013 |
| Peldon Rose (Mechanical and Electrical) Limited | Construction | 1987 |
| Peldon Rose Group Limited | Construction | 2003 |
| Peldon Rose Limited | Construction | 1988 |
| Pendragon Residential Limited | Real estate | 2011 |
| Pentagon Solutions and Services Ltd | Real estate | 2025 |
| Pettifer Group Ltd | Financial services | 2018 |
| Pharmhealth Limited | Real estate | 2008 |
| PI Consulting (Trustee Services) Limited | Professional & scientific | 2001 |
| PI Consulting (UK) Limited | Professional & scientific | 2001 |
| PI Partnership (EBT) Limited | Professional & scientific | 2011 |
| PI Partnership Limited | Professional & scientific | 2011 |
| PI Trustee Services 5G Limited | Professional & scientific | 2015 |
| Pilango Limited | Manufacturing | 2016 |
| Pilates Circuit Limited | Arts & recreation | 2019 |
| Pillhark Limited | Real estate | 2022 |
| Pink Static Films Ltd | Information & communication | 2023 |
| Pinkmma Ltd | Arts & recreation | 2024 |
| Pinner Towers Properties Limited | Real estate | 2015 |
| Pits Global Data Recovery Services Ltd | Information & communication | 2023 |
| PJS Design & Build Ltd. | Construction | 2022 |
| Polloi & Fauna Limited | Manufacturing | 2019 |
| Pomona IMC Ltd | Wholesale & retail | 2017 |
| Portman Partners Limited | Administrative & support | 2018 |
| Pragmatec Properties Ltd | Real estate | 2025 |
| Praxis Factor Limited | Information & communication | 2023 |
| Precise Supplies Ltd | Wholesale & retail | 2022 |
| Pregunta Limited | Other services | 2007 |
| Premier Group Management LLP | | 2023 |
| Prime Bidco Limited | Extraterritorial | 2018 |
| Prime Consulting (U.K) Limited | Professional & scientific | 2021 |
| Prime ESS Limited | Extraterritorial | 2019 |
| Prime M&E Week Event Limited | Administrative & support | 2021 |
| Prime Midco Limited | Extraterritorial | 2018 |
| Prime Noteco Limited | Extraterritorial | 2018 |
| Prime Retail Technology Event Limited | Administrative & support | 2021 |
| Prime Security Event Limited | Extraterritorial | 2018 |
| Prime Topco Limited | Extraterritorial | 2018 |
| Primrose Lane Limited | Real estate | 2008 |
| Prinsen Capital Ltd | Financial services | 2022 |
| Prisam Solutions Ltd | Information & communication | 2024 |
| Prismcube Associates Ltd | Real estate | 2018 |
| Pro MAX Group Limited | Construction | 2026 |
| Project Rumi Limited | Real estate | 2024 |
| Project Salt Bidco Limited | Financial services | 2025 |
| Project Salt Topco Limited | Financial services | 2025 |
| Proliquidity Ltd | Information & communication | 2013 |
| Promologic Limited | Administrative & support | 2008 |
| Property Clinic Services Ltd | Financial services | 2023 |
| Property Maintenance & Management Services Limited | Real estate | 2010 |
| PSB Maintenance Services Limited | Real estate | 2026 |
| Pugin Management Company Limited | Extraterritorial | 1995 |
| Pullman Place Residents Company Limited | Households | 1991 |
| Pulse and Beets Wellness Ltd | Information & communication | 2024 |
| Pure Anarchy Ltd | Information & communication | 2020 |
| Qasr Corporation Limited | Information & communication | 2017 |
| QPD2 Limited | Construction | 2020 |
| Quarterhill Limited | Professional & scientific | 2016 |
| Queens Road Wimbledon Management Company Limited | Households | 1993 |
| Quick People Ltd | Information & communication | 2012 |
| Quintex Services Limited | Professional & scientific | 2008 |
| R&R Mortgage Services Ltd | Financial services | 2025 |
| R.I.F.A.A (South) Limited | Education | 2016 |
| R.I.F.A.A Limited | Education | 2001 |
| R.W.Miller Plumbing & Heating Ltd | Construction | 2023 |
| RA Advisory Ltd | Professional & scientific | 2017 |
| Rack Servers.Com Ltd | Extraterritorial | 2000 |
| Radiance Clinic Ltd | Other services | 2015 |
| Raedforth Ltd | Professional & scientific | 2024 |
| Rant Consultancy Limited | Information & communication | 2018 |
| Rausoft UK Ltd | Information & communication | 2023 |
| Raygun Ltd | Administrative & support | 2012 |
| Raynes Park Vale FC Limited | Arts & recreation | 2021 |
| RB Real Estate Ltd | Real estate | 2018 |
| Readyclass Limited | Real estate | 1979 |
| Reakt Ltd | Information & communication | 2022 |
| Redfire CR Ltd | Hospitality | 2024 |
| Reedmine Limited | Professional & scientific | 1989 |
| Relax Thai Massage Ltd | Other services | 2026 |
| RH International Group Ltd | Real estate | 2025 |
| Richmonds of London Limited | Wholesale & retail | 1927 |
| Right Choice London Ltd | Wholesale & retail | 2025 |
| RNJ Consultancy Limited | Professional & scientific | 2009 |
| Rocket House Properties Limited | Hospitality | 2020 |
| Rockridge Medical Limited | Professional & scientific | 2015 |
| Rocoja Limited | Administrative & support | 2012 |
| Rohini Tech Limited | Information & communication | 2015 |
| Roosevelt Court Management Company Limited | Households | 2005 |
| Roseberry Media Ltd | Information & communication | 2025 |
| Roseworks Limited | Manufacturing | 2022 |
| Rovigo Pizza Ltd | Hospitality | 2019 |