| Plank Public Relations Limited | Professional & scientific | 2005 |
| Planned 2 Perfection Limited | Arts & recreation | 2001 |
| Playmaker Productions Ltd | Information & communication | 2011 |
| Plevna Road Freehold Limited | Households | 2019 |
| Plossom Ltd | Real estate | 2014 |
| Plough Properties Limited | Real estate | 1963 |
| Plural London Limited | Other services | 2024 |
| Plush Folly Limited | Other services | 2004 |
| Point Lumina Medical Advisory Ltd | Professional & scientific | 2026 |
| Polo & Tweed Ltd | Extraterritorial | 2016 |
| Poly Point Ltd | Information & communication | 2025 |
| Pomp House Ltd | Information & communication | 2016 |
| Pompe Investments | Financial services | 2024 |
| Poplar Way Residents Association Limited | Households | 1985 |
| Porchside (Southdown Hall Estate Gardens) Limited | Households | 1964 |
| Porschers Ltd | Wholesale & retail | 1987 |
| Port Left Starboard Right Limited | Administrative & support | 2026 |
| Portfoliowizz Ltd | Financial services | 2018 |
| Powertree Ltd | Professional & scientific | 2025 |
| Ppfoodlondon Limited | Hospitality | 2025 |
| PRD Cuisine Limited | Hospitality | 2018 |
| Precise Sealants Limited | Construction | 2019 |
| Premier Fleet Management and Contract Hire Limited | Financial services | 2006 |
| Premium Delivery Services Ltd | Transport & logistics | 2024 |
| Prenci Ltd | Wholesale & retail | 2025 |
| Prenci Property Limited | Real estate | 2024 |
| Presence Capital Ltd | Financial services | 2023 |
| Press Print Limited | Manufacturing | 2020 |
| Prestige Global Solutions Limited | Wholesale & retail | 2020 |
| Prestwood Osteopathic & Natural Health Centre Limited | Health & social care | 2006 |
| Princes House Property Management Limited | Households | 2003 |
| Principality Maintenance Services Ltd | Construction | 2015 |
| Priory Medical Limited | Health & social care | 2026 |
| Prism Homes Limited | Real estate | 2019 |
| Priya Estates Ltd | Real estate | 2020 |
| Prn.Locum Limited | Professional & scientific | 2024 |
| Prodcadia Limited | Information & communication | 2023 |
| Professional IT Solutions Limited | Information & communication | 2013 |
| Project 23RD Century Ltd | Information & communication | 2017 |
| Project Alterra Ltd | Professional & scientific | 2025 |
| Promik Transport Ltd | Transport & logistics | 2025 |
| Promise Investments Limited | Financial services | 2025 |
| Promptmed Ltd | Information & communication | 2025 |
| Prop Cameras Ltd | Information & communication | 2022 |
| Prop Charlie Ltd | Extraterritorial | 2017 |
| Properability Ltd | Extraterritorial | 2018 |
| Property Frog International Ltd | Real estate | 2017 |
| Property Options PTY Ltd | Real estate | 2012 |
| Property SQ2 Ltd | Education | 2017 |
| Propportunity Ltd | Real estate | 2018 |
| Prospect Apparel Ltd | Wholesale & retail | 2018 |
| Prospera Investments PTE Ltd | Extraterritorial | 2014 |
| Proud House Properties Ltd | Real estate | 2017 |
| Prpl Ltd | Construction | 2012 |
| PRU Goudie Consultancy Limited | Administrative & support | 2016 |
| Psctherm Ltd | Wholesale & retail | 2026 |
| PTA Tickets Limited | Administrative & support | 2026 |
| PTR Holdings Ltd | Financial services | 2019 |
| Pupilcoach Ltd | Transport & logistics | 2000 |
| Pure Beauty Lounge Ltd | Wholesale & retail | 2025 |
| Pure VET Ltd | Professional & scientific | 2025 |
| Purple Dinosaur Ltd | Administrative & support | 2023 |
| Putney Investment Limited | Real estate | 2023 |
| QMP Ltd | Wholesale & retail | 2024 |
| Qrislin Corporation Limited | Extraterritorial | 2017 |
| Quattro Development & Construction Ltd | Construction | 2024 |
| Quick MIX London Ltd | Construction | 2024 |
| Quick Real Estates Ltd | Real estate | 2023 |
| R Koca Ltd | Construction | 2015 |
| R&G Property Investments Ltd | Real estate | 2018 |
| R.D. Heating & Plumbing Ltd | Construction | 2018 |
| R8 Marine Ltd | Manufacturing | 2022 |
| Raaah Liverpool Ltd | Real estate | 2023 |
| Rachel Green Donovan Ltd | Professional & scientific | 2026 |
| Radiana Ltd | Construction | 2025 |
| Radiant Touch Solutions Limited | Administrative & support | 2025 |
| Raffli Properties Ltd | Real estate | 2018 |
| Raglan Gatehouse Developments Ltd | Construction | 2019 |
| Raid Management Consultancy Limited | Information & communication | 2025 |
| Railway Public House Limited | Hospitality | 2022 |
| Rainbrook Limited | Wholesale & retail | 1977 |
| Rakavi Properties Ltd | Real estate | 2023 |
| Ramboz Solutions Ltd | Extraterritorial | 2018 |
| Ramm SON & Crocker Limited | Extraterritorial | 1931 |
| Ranville Properties Limited | Real estate | 1980 |
| Rara Property Limited | Real estate | 2012 |
| Rare Investments Ltd | Real estate | 2019 |
| Rauk Investment Ltd | Real estate | 2018 |
| RAVINEEL1 Ltd | Extraterritorial | 2019 |
| RAW Galore Ltd | Administrative & support | 2018 |
| Raycuts Salon Ltd | Other services | 2018 |
| RB PUB Hampton Ltd | Hospitality | 2026 |
| RC Vision CIC | Education | 2022 |
| RCM Plumbing & Heating Ltd | Construction | 2025 |
| RCS Property Developments Ltd | Construction | 2019 |
| Reach Wide Ltd | Wholesale & retail | 2022 |
| Real Beauty Skin Clinic Ltd | Health & social care | 2023 |
| Realfix Construction Ltd | Construction | 2018 |
| REALTY24 Ltd | Wholesale & retail | 2022 |
| Reason Creative Limited | Information & communication | 2014 |