| Pyon AI Ltd | Information & communication | 2022 |
| Pyra Properties Limited | Real estate | 2020 |
| Pyramid Design and Build Ltd | Construction | 2018 |
| Pyvotal Digital Marketing Limited | Professional & scientific | 2015 |
| Pyxis Project Services Limited | Information & communication | 2004 |
| Q & S Consultancy Services Limited | Professional & scientific | 2025 |
| Q Catering Limited | Other services | 2017 |
| Q Traders Ltd | Wholesale & retail | 2021 |
| Q Vision Limited | Other services | 2017 |
| Q-Estimates Limited | Professional & scientific | 2013 |
| Q-Way Enterprises Limited | Real estate | 2021 |
| Q.E Homes Ltd | Real estate | 2024 |
| Q147 Ltd | Arts & recreation | 2014 |
| Qadash 4 TL CIC | Administrative & support | 2025 |
| QAI Property Management Ltd. | Real estate | 2020 |
| QAI Trading Ltd | Wholesale & retail | 2026 |
| Qamar Learning Academy Ltd | Information & communication | 2020 |
| Qamura Ltd | Wholesale & retail | 2025 |
| Qasim Opticals Ltd | Health & social care | 2014 |
| Qasimco Ltd | Wholesale & retail | 2026 |
| Qatar Services Ltd | Wholesale & retail | 2019 |
| Qave Ltd | Wholesale & retail | 2018 |
| Qayyum & Sons Accountants Limited | Professional & scientific | 2021 |
| Qayyum & Zain Limited | Professional & scientific | 2014 |
| Qazwah Aerospace Solutions Limited | Transport & logistics | 2025 |
| QB Industries Ltd | Wholesale & retail | 2021 |
| Qboid One Group Limited | Real estate | 2021 |
| QCC Quality Care Compliance Ltd | Professional & scientific | 2022 |
| Qdos Accident Assistance Limited | Financial services | 2004 |
| Qdos Digital Media Limited | Extraterritorial | 2011 |
| Qdos Insurance Services Limited | Financial services | 2005 |
| Qdos Law Limited | Professional & scientific | 2011 |
| Qebm Ltd | Professional & scientific | 2004 |
| QFG Ltd | Professional & scientific | 2017 |
| QH Auto Services Ltd | Wholesale & retail | 2019 |
| QHS Consultants Limited | Professional & scientific | 2017 |
| Qibla Media Solutions Ltd | Information & communication | 2025 |
| Qinso Trading Ltd | Wholesale & retail | 2022 |
| Qisong Ltd | Information & communication | 2021 |
| QOD Nail Decals Ltd | Wholesale & retail | 2019 |
| Qpers UK Invest Limited | Real estate | 2026 |
| QQ HR Partners Limited | Professional & scientific | 2025 |
| QR Mart UK Ltd | Wholesale & retail | 2023 |
| Qsapp Ltd | Professional & scientific | 2021 |
| Qsoc Ltd | Information & communication | 2019 |
| QT Investment Management Ltd | Financial services | 2025 |
| QTO International Ltd | Professional & scientific | 2024 |
| Quadrant Pharmaceuticals Limited | Administrative & support | 2003 |
| Quaint Legal Limited | Professional & scientific | 2022 |
| Qualisure Limited | Information & communication | 2024 |
| Quality Apartments Ltd | Real estate | 2008 |
| Quality Builders (N West) Ltd | Construction | 2019 |
| Quality Bureau Limited | Professional & scientific | 2026 |
| Quality Control Inspections Ltd | Professional & scientific | 2018 |
| Quality Facilities Management Ltd | Administrative & support | 2024 |
| Quality Hair Transplant Ltd | Administrative & support | 2026 |
| Quality Halal Meat (Bolton) Ltd | Wholesale & retail | 2022 |
| Qualitytecbl Ltd | Wholesale & retail | 2026 |
| Quama Services Limited | Transport & logistics | 2026 |
| Quan Education Consultancy Limited | Education | 2018 |
| QUANT42 Ltd | Information & communication | 2026 |
| Quantaim Limited | Information & communication | 2023 |
| Quantitas Consulting Limited | Professional & scientific | 2018 |
| Quantix Technical Recruitment Ltd | Administrative & support | 2025 |
| Quantoxpath Ltd | Professional & scientific | 1993 |
| Quants & Projects Ltd | Professional & scientific | 2023 |
| Quantss Limited | Information & communication | 2023 |
| Quantum Autohaus Ltd | Wholesale & retail | 2025 |
| Quantum Computer Limited | Wholesale & retail | 1991 |
| Quantum Courier Services UK Limited | Transport & logistics | 2025 |
| Quantum Dataflow Limited | Information & communication | 2025 |
| Quantum Exchange Ltd | Financial services | 2024 |
| Quantum FM Ltd | Transport & logistics | 2023 |
| Quantum Guard Systems Ltd | Administrative & support | 2024 |
| Quantum Optique Ltd | Health & social care | 2019 |
| Quantum Pursuits (UK) Limited | Other services | 1994 |
| Quantum Reach Solutions Ltd | Information & communication | 2025 |
| Quantum Saga Ltd | Information & communication | 2025 |
| Quantum Track Ltd | Transport & logistics | 2026 |
| Quantumheights Global Services Ltd | Information & communication | 2025 |
| Quarlton Limited | Real estate | 1991 |
| Quarrybank Plumbers Ltd | Construction | 2019 |
| Quattro LV Transport Ltd | Transport & logistics | 2026 |
| Quattro Medical Writing Ltd | Administrative & support | 2018 |
| Quattro Pharma Limited | Wholesale & retail | 2019 |
| Quay Enterprises Online Ltd | Wholesale & retail | 2014 |
| Quays Security Services Limited | Professional & scientific | 1992 |
| Quayside (NW) Ltd | Hospitality | 2019 |
| Qube Luxe Ltd | Wholesale & retail | 2020 |
| Qube Residential (Bolton) Ltd | Real estate | 2017 |
| Qube Store Ltd | Wholesale & retail | 2025 |
| Qubicle Furniture Ltd | Manufacturing | 2023 |
| QUE Enterprises Limited | Real estate | 2013 |
| Queen & Sykes Ltd | Professional & scientific | 2024 |
| Quentessential Surveying Ltd | Professional & scientific | 2016 |
| Quick & Fast Builders Ltd | Construction | 2026 |
| Quick Brick Trade Academy Ltd | Construction | 2025 |
| Quick Clean and Gleam Ltd | Administrative & support | 2019 |
| Quick FIX (NE) Ltd | Wholesale & retail | 2019 |
| Quick FIX Tyres Ltd | Manufacturing | 2025 |