| Protouchcleaning Ltd | Wholesale & retail | 2025 |
| Providence Independent Social Work Services Ltd | Administrative & support | 2025 |
| Provident Business Solutions Ltd | Information & communication | 2025 |
| Provident Estates Limited | Real estate | 2018 |
| Provocateur Records Limited | Manufacturing | 2000 |
| Proyer Property Limited | Real estate | 2019 |
| PRT Solutions Ltd | Administrative & support | 2017 |
| PSI Consult International Limited | Professional & scientific | 2010 |
| PSK Heights (East) Ltd | Real estate | 2025 |
| PSK Heights Ltd | Real estate | 2020 |
| PSL Real Estate Ltd | Real estate | 2017 |
| Psvtechx Ltd | Professional & scientific | 2024 |
| Psychiatrists on Call Limited | Health & social care | 2015 |
| Psychicology Holdings Ltd | Financial services | 2025 |
| PTX Solutions Limited | Administrative & support | 2011 |
| Public Engagement Agency Limited | Professional & scientific | 2012 |
| Public Safety Training & Response Group Ltd | Administrative & support | 2024 |
| Pupdays Ltd | Information & communication | 2026 |
| Pure PC Services Limited | Administrative & support | 2012 |
| Pure Perks Ltd | Wholesale & retail | 2024 |
| Pure Property Maintenance Limited | Administrative & support | 2017 |
| Pureshine Cleaning Limited | Administrative & support | 2024 |
| Purity Ltd | Professional & scientific | 2019 |
| Purple ASH Media Limited | Professional & scientific | 2021 |
| Purple INK Digital Ltd | Professional & scientific | 2025 |
| Purple Magnolia Ltd | Real estate | 2025 |
| Putney Reach Limited | Construction | 2013 |
| Q-Ship Society CIC | Arts & recreation | 2024 |
| Qait Consult Limited | Information & communication | 2017 |
| Qamar & Sons Ltd | Wholesale & retail | 2024 |
| Qaren Ltd | Information & communication | 2026 |
| Qbee Real Estate Limited | Real estate | 2026 |
| Qdcc Ltd | Manufacturing | 2023 |
| QI Energy Limited | Construction | 2023 |
| Qmkm Services Limited | Professional & scientific | 2024 |
| Qonsultancy Ltd | Professional & scientific | 2025 |
| Qophi Ltd | Real estate | 2022 |
| QS Retention Support Ltd | Professional & scientific | 2025 |
| QS Support Ltd | Professional & scientific | 2012 |
| Quadrant Property Partners Ltd | Real estate | 2025 |
| Quality Flooring Specialist Ltd | Construction | 2025 |
| Qualixa Ltd | Wholesale & retail | 2025 |
| Quantum Digital Waters Ltd | Information & communication | 2025 |
| Quantum Path Healing Ltd | Health & social care | 2025 |
| Quarrington Electrical Contracts Ltd | Construction | 2010 |
| Quarrington Estates Ltd | Real estate | 2024 |
| Quarterdeck Sandgate Limited | Construction | 2021 |
| Quay Admin Ltd | Administrative & support | 2022 |
| Quayside Roofing Services Ltd | Construction | 2022 |
| Quayworks Ltd | Administrative & support | 2021 |
| Quench Power Ltd | Energy | 2012 |
| Quepeace Ltd | Health & social care | 2022 |
| Quick Brick Properties Limited | Real estate | 2023 |
| Quick Dine Ltd | Hospitality | 2023 |
| Quick Draw Card Co. Ltd | Manufacturing | 2018 |
| Quick FIX Coffee Ltd | Administrative & support | 2023 |
| Quick Transport Medway Ltd | Transport & logistics | 2025 |
| Quickfix Concierge Ltd | Administrative & support | 2025 |
| Quorenta Solutions Ltd | Real estate | 2024 |
| R & FW Mech Dezign Limited | Other services | 2016 |
| R & T Utility Services Limited | Construction | 2024 |
| R B Leeman Holdings Limited | Financial services | 2026 |
| R D Knight Properties Limited | Real estate | 2023 |
| R G Menditta Ltd | Construction | 2006 |
| R G Solutions Limited | Information & communication | 2020 |
| R J Harding Consulting Limited | Construction | 2016 |
| R N R Housing Development Limited | Real estate | 2025 |
| R Palmer Construction Management Ltd | Construction | 2024 |
| R&G Tracks Ltd | Wholesale & retail | 2021 |
| R&H Kent Property Limited | Real estate | 2017 |
| R&K (JEN UK) Limited | Real estate | 2019 |
| R&M Accommodation Services Limited | Real estate | 2026 |
| R&Roll Decorating Ltd | Construction | 2023 |
| R&S Suppliers UK Ltd | Wholesale & retail | 2024 |
| R'Eagle Minds Limited | Health & social care | 2013 |
| R.C.D. Auto Service Limited | Wholesale & retail | 2020 |
| R.J.C Investments Ltd | Professional & scientific | 2006 |
| R1 Civils & Groundworks Limited | Construction | 2025 |
| R1 Demolition & Waste Limited | Water & waste | 2025 |
| Rabiakitchen Limited | Wholesale & retail | 2025 |
| Radar Recruitment Ltd | Administrative & support | 2018 |
| Radiance Consulting Group Limited | Professional & scientific | 2025 |
| Radical Resource Limited | Administrative & support | 2022 |
| Radon Options Ltd | Administrative & support | 2025 |
| RAF Construction Limited | Construction | 2017 |
| RAG Corporation LLP | | 2017 |
| Rail Link Limited | Construction | 2013 |
| Railsimulator.Com Limited | Information & communication | 2008 |
| Railway House Living Ltd | Construction | 2019 |
| Railworks Limited | Construction | 2012 |
| Rainchq Ltd | Financial services | 2018 |
| Rainfame Ltd | Professional & scientific | 2023 |
| Rainfame Security Limited | Administrative & support | 2024 |
| Rainham Care Services Limited | Health & social care | 2023 |
| Rainham Energy Assessment Services Ltd | Extraterritorial | 2010 |
| Rainham Group Limited | Construction | 2026 |
| Raiya Digital Limited | Professional & scientific | 2026 |
| RAJ Bangar Limited | Construction | 2007 |
| RAJ Patel Consultants Limited | Professional & scientific | 2007 |
| Raja Property(Services) Ltd | Real estate | 2019 |