| Psychcare Online Services Ltd | Health & social care | 2025 |
| PT Surgical Ltd | Health & social care | 2018 |
| Ptms Carpentry Limited | Construction | 2023 |
| PTP Property Light Ltd | Real estate | 2023 |
| PTS London Ltd | Information & communication | 2014 |
| Publicmedia CIC | Information & communication | 2010 |
| Pufferfish Shipping Ltd | Transport & logistics | 2020 |
| Puffin Design Limited | Professional & scientific | 2022 |
| Pulse Home Services Ltd | Real estate | 2018 |
| Pulse TM Ltd | Construction | 2024 |
| Punch Presentations Ltd | Education | 2021 |
| Pure Maiden Ltd | Wholesale & retail | 2011 |
| Pure Serenity Beauty Ltd | Other services | 2026 |
| Pure-Minds Ltd | Professional & scientific | 2023 |
| Purity Nail Beauty Limited | Other services | 2021 |
| Purnishajewels Ltd | Wholesale & retail | 2025 |
| Purple Inquiries Ltd | Financial services | 2023 |
| Purple Moving & Handling Ltd | Health & social care | 2015 |
| Purple Tulip Transportation Ltd | Transport & logistics | 2025 |
| Purpose Driven Sports Ltd | Education | 2023 |
| Purpose Life Coaching & Consulting Ltd | Professional & scientific | 2024 |
| Pursue Public Pathways Ltd | Professional & scientific | 2026 |
| Pushpam Properties Ltd | Real estate | 2022 |
| PVA Medical Limited | Health & social care | 2014 |
| Pvipc Ltd | Administrative & support | 2025 |
| PWR Performance Ltd | Arts & recreation | 2024 |
| Pyramid Engineering Services Company Limited | Manufacturing | 1989 |
| Pyrojunkies Ltd | Administrative & support | 2003 |
| Pyrowarehouse Limited | Extraterritorial | 2015 |
| Pâté Creative Ltd | Professional & scientific | 2024 |
| Q Law Pharma Consulting Ltd | Professional & scientific | 2017 |
| Q2M Consulting Ltd | Professional & scientific | 2015 |
| Q2M Properties Ltd | Real estate | 2024 |
| Qasar-E-Noor Ltd | Extraterritorial | 2024 |
| Qdeals Portals Ltd | Wholesale & retail | 2020 |
| QDL Group Ltd | Professional & scientific | 2020 |
| QLA Consultancy Ltd | Professional & scientific | 2018 |
| Qlass Ltd | Health & social care | 2026 |
| QPI Surveyors Ltd | Professional & scientific | 2024 |
| QT Infinite Ltd | Hospitality | 2026 |
| Qtec Lift Services Ltd | Construction | 2021 |
| Quaero Ltd | Administrative & support | 2017 |
| Quality GAS Audit Services Limited | Professional & scientific | 2000 |
| Quality Tyres Services Ltd | Wholesale & retail | 2018 |
| QUALITYPLUS360 Ltd | Wholesale & retail | 2022 |
| Quang ANH Ltd | Other services | 2024 |
| Quantative Management Limited | Professional & scientific | 2018 |
| Quantiva Group Ltd | Professional & scientific | 2025 |
| Quantum GEN Limited | Construction | 2025 |
| Quantumsoft Consulting Limited | Information & communication | 2025 |
| Quantumval Solutions Ltd | Information & communication | 2024 |
| Quaye Holdings Ltd | Financial services | 2021 |
| Quaye Services Limited | Professional & scientific | 2020 |
| Qubit Contractors Limited | Financial services | 2025 |
| Qubit Furniture Limited | Manufacturing | 2025 |
| Qubit Inc Limited | Information & communication | 2013 |
| Qubit Interior Solutions Limited | Construction | 2015 |
| Qubit Moves and Storage Limited | Transport & logistics | 2020 |
| Quest Gardens Limited | Administrative & support | 2026 |
| Quester Limited | Education | 2021 |
| Quick Abode Limited | Households | 2025 |
| Quick Point Tech Ltd | Information & communication | 2017 |
| Quick Roofing & Building Ltd | Construction | 2023 |
| Quick Solution BD Ltd | Manufacturing | 2022 |
| Quickvalue Properties Limited | Real estate | 2024 |
| Quince Creative Ltd | Information & communication | 2016 |
| Quinnsta Ltd | Wholesale & retail | 2024 |
| Quintaid Limited | Real estate | 2013 |
| Quintessential Holdings Ltd | Professional & scientific | 2018 |
| Quintic Investments Ltd | Financial services | 2021 |
| Quirkably Yours Ltd | Extraterritorial | 2024 |
| Qvposh Services Limited | Health & social care | 2013 |
| Qweek Limited | Transport & logistics | 2025 |
| R & B PVT. Limited | Wholesale & retail | 2017 |
| R & D 2 Properties Limited | Real estate | 2014 |
| R & D Batchelor Ductwork Ltd | Construction | 2008 |
| R & D Stone Ltd | Administrative & support | 2003 |
| R & J Cozy Homes Ltd | Hospitality | 2025 |
| R & P Portfolio Limited | Real estate | 2019 |
| R & R Building Limited | Construction | 2018 |
| R & R Sall Limited | Real estate | 2019 |
| R & Z Exterior Cleaning Ltd | Administrative & support | 2023 |
| R and K Housing Limited | Real estate | 2025 |
| R and V Events Limited | Hospitality | 2017 |
| R C Mobile Valeters Ltd | Administrative & support | 2021 |
| R H Gardening Services Limited | Administrative & support | 2011 |
| R Haleem Limited | Wholesale & retail | 2024 |
| R I South East Limited | Construction | 2024 |
| R Jones Holdings Ltd | Households | 2019 |
| R K Heritage Ltd | Arts & recreation | 2023 |
| R Kozdrowski Ltd | Construction | 2014 |
| R M Burford Plumbing & Heating Limited | Construction | 2008 |
| R R Martin Ltd | Information & communication | 2023 |
| R S Drylining (London) Limited | Construction | 2006 |
| R S Procool Limited | Construction | 2009 |
| R T Ewen Electrical & Building Services Ltd | Administrative & support | 2019 |
| R V Construction Services Limited | Construction | 2005 |
| R&M Therapy Limited | Health & social care | 2026 |
| R&R Garage Ltd | Real estate | 2025 |
| R&R Pizza School Ltd | Manufacturing | 2026 |