| Qorvus Technology Solutions Limited | Wholesale & retail | 2026 |
| Qoscore Ltd | Information & communication | 2020 |
| Qpharma Services Limited | Professional & scientific | 2014 |
| QQ Solutions Limited | Information & communication | 1994 |
| QR Drainage Ltd | Other services | 2024 |
| QRM Group Ltd | Construction | 2026 |
| QS Hub Ltd | Professional & scientific | 2019 |
| QS Supplies Limited | Manufacturing | 2005 |
| Qscert-United Kingdom Ltd | Professional & scientific | 2019 |
| QSE Properties Ltd | Real estate | 2019 |
| QSE Trading Ltd | Construction | 2015 |
| QSH Propco Limited | Construction | 2013 |
| Qtmhs Ltd | Construction | 2022 |
| Quad Finance Limited | Professional & scientific | 1972 |
| Quadbury Haulage Ltd | Transport & logistics | 2014 |
| Quadfecta Ltd | Wholesale & retail | 2025 |
| Quadm Group Ltd | Manufacturing | 2026 |
| Quadring Store Ltd | Transport & logistics | 2015 |
| Quadruple Limited | Real estate | 2019 |
| Quakers Homes Ltd | Real estate | 2024 |
| Qualing Limited | Wholesale & retail | 2025 |
| Qualisales Limited | Wholesale & retail | 2025 |
| Quality City Birmingham Ltd | Real estate | 2023 |
| Quality City Building Management Ltd | Households | 2025 |
| Quality City Leicester Limited | Real estate | 2024 |
| Quality City Limited | Real estate | 2006 |
| Quality City Tyres Ltd | Wholesale & retail | 2025 |
| Quality Construction Ltd | Construction | 2016 |
| Quality DIY & Hardware Ltd | Wholesale & retail | 2015 |
| Quality First 1 Ltd | Construction | 2026 |
| Quality Fresh Produce Ltd | Wholesale & retail | 2006 |
| Quality GEM UK Ltd | Other services | 2024 |
| Quality Graphics (Midlands) Limited | Manufacturing | 2006 |
| Quality Industrial Cleaning Limited | Other services | 2009 |
| Quality Perfume Shop Ltd | Wholesale & retail | 2026 |
| Quality Quote Car Body Repairs Ltd | Wholesale & retail | 2024 |
| Quality Roofing Specialists Limited | Construction | 1993 |
| Quality Services 5500 Limited | Wholesale & retail | 2025 |
| Quality Social Housing Group Limited | Real estate | 2017 |
| Quality Social Housing Management Limited | Real estate | 2008 |
| Quality Stitch Ltd | Other services | 2023 |
| Quality Supplies Limited | Wholesale & retail | 2008 |
| Quality Zone Ltd | Wholesale & retail | 2024 |
| QUALITY4LESS Limited | Wholesale & retail | 2019 |
| Qualitybridge Consulting UK Ltd | Information & communication | 2025 |
| Qualvis Litho Limited | Manufacturing | 1974 |
| Qualvis Packaging Limited | Manufacturing | 1982 |
| Qualvis Print & Packaging Ltd | Manufacturing | 2013 |
| Quander Ltd | Professional & scientific | 2015 |
| Quanta Engineering Ltd | Professional & scientific | 2017 |
| Quantapanda Limited | Information & communication | 2023 |
| Quantech Ltd | Wholesale & retail | 2009 |
| Quantis Services Limited | Wholesale & retail | 2018 |
| Quantiscient Ltd | Information & communication | 2025 |
| Quantity Surveying International Ltd | Professional & scientific | 2009 |
| Quantive Commercial Management Limited | Construction | 2025 |
| Quantlevia Consulting Limited | Professional & scientific | 2014 |
| Quantmod Limited | Information & communication | 2019 |
| Quantpeak Holdings Limited | Financial services | 2023 |
| Quantrol Solutions Ltd | Information & communication | 2026 |
| Quantum Cyber Solutions Ltd | Information & communication | 2026 |
| Quantum Estates & Developments Limited | Real estate | 2026 |
| Quantum Executive Travel Ltd | Transport & logistics | 2023 |
| Quantum Genesis Ltd | Wholesale & retail | 2024 |
| Quantum House Properties Limited | Extraterritorial | 2024 |
| Quantum Leicester Holdings Limited | Real estate | 2018 |
| Quantum Medical Care Limited | Health & social care | 2025 |
| Quantum Retails Limited | Wholesale & retail | 2025 |
| Quantum Security Solutions Ltd | Administrative & support | 2012 |
| Quantum-Hydroponics Limited | Manufacturing | 2021 |
| Quantums Consulting Ltd | Professional & scientific | 2025 |
| Quarmby Promotions Limited | Manufacturing | 2001 |
| Quarratul-Ayn Ltd | Other services | 2019 |
| Quarrhurst Limited | Construction | 2014 |
| Quarrhurst Lodge Limited | Construction | 2014 |
| Quarrington Logistics Ltd | Transport & logistics | 2014 |
| Quarterly Ltd. | Information & communication | 2025 |
| Quarterstone Developments Limited | Construction | 2025 |
| Quartz Entertainment Limited | Information & communication | 2024 |
| Quasar London Limited | Wholesale & retail | 2025 |
| Quashie & Co Ltd | Wholesale & retail | 2022 |
| Quatrix EOT Limited | Other services | 2025 |
| Quatrix Ltd | Information & communication | 2013 |
| Quattro Self Drive Ltd | Administrative & support | 2016 |
| Quattro Service Station Ltd | Wholesale & retail | 2018 |
| Quay Edge Ltd | Wholesale & retail | 2025 |
| Qube Construction Limited | Construction | 2019 |
| Qube Engineering Support Services Ltd | Other services | 2012 |
| Qube Procurement Ltd | Other services | 2023 |
| Qubeta UK Limited | Wholesale & retail | 2023 |
| Qubic Healthcare Personnel Limited | Administrative & support | 2022 |
| Queeens ST Car Park Ltd | Transport & logistics | 2026 |
| Queen BEE Cosmetic Ltd | Wholesale & retail | 2025 |
| Queens Court Management Company (Derby) Limited | Households | 2005 |
| Queensbridge M.C. Limited | Real estate | 2005 |
| Queensdale Care Ltd | Health & social care | 2025 |
| Queensway Conference Centre Limited | Other services | 2014 |
| Queni Bean Limited | Hospitality | 2023 |
| Queniborough Aluminium Services Limited | Administrative & support | 2002 |
| Queniborough Equestrian Centre Limited | Arts & recreation | 2018 |