| PSG Property Ltd | Real estate | 2017 |
| PSJ Accounting Services LLP | | 2008 |
| PSM Water Treatment Ltd | Water & waste | 2018 |
| PSS Tech Services Ltd | Information & communication | 2023 |
| Ptech Engineering Services Limited | Construction | 2016 |
| PTI (Essex) Limited | Construction | 2013 |
| PTM Couriers Ltd | Transport & logistics | 2016 |
| Pulcher Hortus Limited | Administrative & support | 2017 |
| Pullsafe UK Ltd | Construction | 2025 |
| Pulse Bathroom Ltd | Construction | 2025 |
| Pump IT UP Parties Limited | Other services | 2022 |
| Pumped Gym Ltd | Arts & recreation | 2024 |
| Pure Afrocaribbean Foods Ltd | Wholesale & retail | 2024 |
| Pure Comfort Homes Ltd | Real estate | 2025 |
| Pure Kombucha Limited | Wholesale & retail | 2020 |
| Pure Movers Ltd | Transport & logistics | 2025 |
| Pure Serenity Limited | Other services | 2017 |
| Purely Property Group Limited | Real estate | 2021 |
| Purple Glow Ltd | Other services | 2018 |
| Purple Petals Ltd | Wholesale & retail | 2022 |
| Purple Phoenix Events Ltd | Professional & scientific | 2023 |
| Purple Zeal Enterprise Limited | Transport & logistics | 2025 |
| Pushnpedal Limited | Wholesale & retail | 2025 |
| Puzzle LAB Ltd | Professional & scientific | 2025 |
| Puzzlebox Furniture Ltd | Manufacturing | 2024 |
| PVA Wealth Ltd | Real estate | 2022 |
| PW Automatics Ltd | Construction | 2025 |
| PW Fabrications (U.K) Limited | Other services | 2022 |
| PWP (UK) Limited | Construction | 2010 |
| PXP ITS Services Ltd | Information & communication | 2008 |
| PYA Elite Management Ltd | Arts & recreation | 2021 |
| Pynestra Management Ltd | Real estate | 2025 |
| PYP Properties Ltd | Real estate | 2017 |
| Q Engineering Ltd | Manufacturing | 2023 |
| Q-Bid Ltd | Wholesale & retail | 2020 |
| Q4 Investments Limited | Extraterritorial | 2009 |
| QED Technical Hub Limited | Mining & quarrying | 2023 |
| Qolaro Limited | Information & communication | 2025 |
| Quad JO Ltd | Real estate | 2020 |
| Quadrant Group Essex Ltd | Construction | 2019 |
| Quadrant Security Services (Land & Marine) Limited | Administrative & support | 1985 |
| Quadrant Security Systems Limited | Administrative & support | 2016 |
| Qualitas Building Services Ltd | Construction | 2025 |
| Quality Build Construct Ltd | Construction | 2024 |
| Quality Pharma Consulting Limited | Real estate | 2007 |
| Quality Plastering (London) Limited | Construction | 2013 |
| Quality Render Specialists Limited | Construction | 2021 |
| Qualo Limited | Construction | 2019 |
| Quantum Football Ltd | Education | 2026 |
| Quantum Interiors Contracts Limited | Construction | 1998 |
| Quantum Mathsonline Ltd. | Education | 2020 |
| Quartermaster Management Consultants Ltd | Professional & scientific | 2021 |
| Qubit Works Ltd | Information & communication | 2025 |
| QUEENBFASHION0907.COM Ltd | Wholesale & retail | 2024 |
| Quest Print Media Limited | Manufacturing | 2020 |
| Quest Property Group Ltd | Construction | 2019 |
| Quest Property Management Ltd | Construction | 2024 |
| Quick FIX Plumbing Co Ltd | Construction | 2025 |
| Quickbrickers Ltd | Real estate | 2023 |
| Quickfix Interiors Limited | Construction | 2023 |
| QUICKPROCESS1 Limited | Wholesale & retail | 2025 |
| Quidmatch Limited | Financial services | 2014 |
| Quinn Developments Ltd | Construction | 2018 |
| R & S Solutions (U.K) Limited | Other services | 2024 |
| R & V (UK) Limited | Other services | 2022 |
| R a Vehicle Mechanics Ltd | Wholesale & retail | 2026 |
| R Aldridge Electrical Ltd | Construction | 2016 |
| R C Warner LP | | 2011 |
| R Line Roofing Ltd | Construction | 2025 |
| R M Developers Limited | Construction | 2014 |
| R R P M Limited | Wholesale & retail | 2005 |
| R T G Construction Limited | Extraterritorial | 2016 |
| R T G Environmental Limited | Extraterritorial | 2016 |
| R T G Hire Limited | Administrative & support | 2016 |
| R T G Labour Solutions Limited | Extraterritorial | 2016 |
| R T G Rail Services Limited | Administrative & support | 2006 |
| R UK Property Limited | Construction | 2021 |
| R W Refurbs Ltd | Construction | 2017 |
| R White Mechanical Ltd | Construction | 2026 |
| R&B Roofing Limited | Construction | 2025 |
| R&C Logistics Limited | Transport & logistics | 2016 |
| R&C Professional Limited | Information & communication | 2019 |
| R&E Concierge Services Ltd | Hospitality | 2011 |
| R&G Developers Ltd | Real estate | 2025 |
| R&J Carpentry & Construction Limited | Construction | 2023 |
| R&J Quality & Decorating Ltd | Construction | 2019 |
| R&R Contracts Limited | Other services | 2021 |
| R&Russ Property Ltd | Real estate | 2023 |
| R(88) Ltd | Construction | 2015 |
| R. O. Engineering Limited | Manufacturing | 2005 |
| R. Sparks Electrical Limited | Construction | 2018 |
| R.A Flooring Recruitment Limited | Construction | 2011 |
| R.A Interior Solutions Limited | Construction | 2021 |
| R.A Interiors (UK) Limited | Other services | 2011 |
| R.A.D Plumbing Limited | Professional & scientific | 2017 |
| R.Conway Grab Hire Limited | Other services | 2018 |
| R.D Adams Limited | Construction | 2023 |
| R.D Interiors Ltd | Construction | 2016 |
| R.F.I. Consultancy Ltd | Administrative & support | 2022 |
| R.H. Contractors (Essex) Limited | Construction | 2023 |