| Promethean Professional Services Ltd | Information & communication | 2021 |
| Promethean Properties Ltd | Real estate | 2020 |
| Prominent Street Wear Ltd | Wholesale & retail | 2021 |
| Prompt Consultancy Ltd | Professional & scientific | 2012 |
| Pronoia Intelligence Ltd | Professional & scientific | 2026 |
| Pronto Inc Ltd | Professional & scientific | 2023 |
| Propel Electrical Ltd | Construction | 2018 |
| Propel Property Limited | Real estate | 2021 |
| Properties by TC Ltd | Real estate | 2021 |
| Property Advisory Services Limited | Administrative & support | 2008 |
| Property Embassy Group Ltd | Real estate | 2024 |
| Property Investments Hornchurch Ltd | Real estate | 2024 |
| Property Refresh Limited | Construction | 2019 |
| Property&Services Ltd | Real estate | 2026 |
| Proron Property Services Ltd | Households | 2022 |
| Prosper Inventory Ltd | Real estate | 2024 |
| Providence Nest Limited | Real estate | 2021 |
| Prowess Electric Services Limited | Construction | 2025 |
| Prowest Bird Control Systems Limited | Water & waste | 2003 |
| Prudent Private Finance Ltd | Financial services | 2022 |
| PSG Property (Essex) Ltd | Real estate | 2026 |
| PSH Transport Ltd | Transport & logistics | 2023 |
| Psychophotonix Ltd | Health & social care | 2022 |
| Pubee Connect Solutions Ltd | Other services | 2026 |
| Puddle Ducks Preschool Ltd | Education | 2025 |
| Pugh Electrical Services Limited | Energy | 2012 |
| Pula Enterprises Limited | Health & social care | 2022 |
| Pulsar Tech Corporation Ltd | Information & communication | 2010 |
| Puma Building Services Limited | Manufacturing | 2013 |
| Pumpvision Ltd | Health & social care | 2022 |
| Pure Cleaning Essex Limited | Administrative & support | 2026 |
| Pure Digital Sports Limited | Information & communication | 2026 |
| Pure Interiors London Limited | Construction | 2025 |
| Purewal Property Holdings Ltd | Real estate | 2024 |
| Purple Meadows Ltd | Professional & scientific | 2012 |
| Purple Pyramid Limited | Wholesale & retail | 2024 |
| Purpose Driven Solutions Limited | Professional & scientific | 2004 |
| Purvis Investments Ltd | Real estate | 2023 |
| Purvis News Ltd | Wholesale & retail | 2016 |
| Pusura Watch Company Limited | Manufacturing | 2023 |
| Putpro Limited | Real estate | 2024 |
| Puzzle Builders Limited | Construction | 2017 |
| PV Music Ltd | Information & communication | 2025 |
| Pvmp Limited | Real estate | 2021 |
| PVS Property Ltd | Real estate | 2025 |
| PX Properties Limited | Real estate | 2020 |
| Pyper Holdings Limited | Wholesale & retail | 2018 |
| Pyramid Architecture Ltd | Professional & scientific | 2020 |
| Pyramid PI Limited | Professional & scientific | 2024 |
| Q & S Smart Security Limited | Construction | 2008 |
| Q-Sap Ltd | Information & communication | 2012 |
| QAD Services Ltd | Administrative & support | 2009 |
| Qazi Consultancy Limited | Health & social care | 2005 |
| QBS Construction Ltd | Construction | 2017 |
| Qcontrol Tuition Limited | Education | 2013 |
| QED Evaluation Limited | Professional & scientific | 2014 |
| Qiblataine Limited | Wholesale & retail | 2023 |
| QLL Construction Ltd | Construction | 2026 |
| Qosgate UK Limited | Information & communication | 2010 |
| Quality Installation Ltd | Construction | 2025 |
| Quality UK Properties Limited | Real estate | 2023 |
| Qualityccb Ltd | Transport & logistics | 2022 |
| Quant Measur Commercial Services Ltd | Professional & scientific | 2022 |
| Quant Measur Holdings Limited | Professional & scientific | 2022 |
| Quanthub Ltd | Financial services | 2018 |
| Quantitative Science Solutions Ltd | Information & communication | 2012 |
| Quantum Coatings Ltd | Construction | 2025 |
| Quantum Envelope Limited | Information & communication | 2026 |
| Quantum Housing Limited | Real estate | 2024 |
| Queenside Developers U.K. Limited | Construction | 2006 |
| Quendon Berries Ltd | Real estate | 2024 |
| Quick FIX Solutions Ltd | Administrative & support | 2024 |
| Quick Renovation Limited | Construction | 2023 |
| Quintessence Consulting Limited | Professional & scientific | 2015 |
| Quondam Antiques & Interiors Ltd | Wholesale & retail | 2021 |
| R & D Management Services UK Ltd | Real estate | 2000 |
| R & M Build Ltd | Construction | 2020 |
| R & M Contracts Limited | Construction | 2019 |
| R a Lennon Fire Protection Ltd | Construction | 2026 |
| R a Lennon LLP | | 2016 |
| R Bhangra Ltd | Arts & recreation | 2023 |
| R C Roofing Limited | Construction | 2015 |
| R G Properties Ltd | Real estate | 2013 |
| R K B Project Management Ltd. | Manufacturing | 2017 |
| R K Plumbing Limited | Professional & scientific | 2007 |
| R K Qvist Building Consultancy Ltd | Professional & scientific | 2026 |
| R L Cross Limited | Other services | 2015 |
| R Scarsbrook Structural Carpentry Ltd | Construction | 2009 |
| R Thurogood Limited | Construction | 2020 |
| R&B Drylining-Construction Ltd | Construction | 2017 |
| R&B Tyres Ltd | Wholesale & retail | 2024 |
| R&H Accountancy Limited | Professional & scientific | 2021 |
| R&R Consultancy Services Ltd | Information & communication | 2022 |
| R&R UK Group Ltd | Construction | 2014 |
| R&T Development Ltd | Construction | 2017 |
| R.A.D. Contracts Ltd. | Construction | 1990 |
| R.D.C Painting & Decorating Ltd | Construction | 2022 |
| R.E.B Group Limited | Construction | 2024 |
| R.J. Gorman & SON Limited | Construction | 2008 |
| R.J.O Developments Ltd | Real estate | 2019 |