| Q and a Car Sales Ltd | Wholesale & retail | 2024 |
| Q&A Electrical Limited | Construction | 2024 |
| Q&Z Properties Limited | Real estate | 2024 |
| Q1 Cars Ltd | Wholesale & retail | 2020 |
| Q6 Solutions Limited | Transport & logistics | 2021 |
| Q7S Distribution Ltd. | Wholesale & retail | 2017 |
| Q7SYSTEMS Ltd. | Wholesale & retail | 2013 |
| Qaizia Group Ltd | Real estate | 2025 |
| Qalbi Ltd | Other services | 2025 |
| Qali's Coffee Ltd | Wholesale & retail | 2025 |
| Qamar Trading Ltd | Construction | 2017 |
| Qaswa Cars Limited | Transport & logistics | 2025 |
| Qatuk International Ltd | Construction | 2026 |
| Qavirtual Ltd | Education | 2022 |
| Qawwali NOW Ltd | Administrative & support | 2018 |
| Qazi Developers Ltd | Real estate | 2024 |
| Qazi Properties Group Ltd | Construction | 2024 |
| Qazitours Ltd | Administrative & support | 2025 |
| Qbec Recruitment Limited | Construction | 2021 |
| QBX Ltd | Transport & logistics | 2015 |
| Qbytepro Ltd | Wholesale & retail | 2024 |
| QD Courier Services Limited | Transport & logistics | 2018 |
| QD Ventures Ltd | Wholesale & retail | 2026 |
| Qedlearning Limited | Information & communication | 2023 |
| Qevani Homes Ltd | Real estate | 2024 |
| QH (Rosewood) Limited | Health & social care | 2013 |
| QH Beaufort Court Limited | Health & social care | 2021 |
| QH Beaufort House Limited | Real estate | 2021 |
| QH Greenhill Limited | Health & social care | 2017 |
| QH High Broom Limited | Health & social care | 2015 |
| QH IP Ltd | Health & social care | 2021 |
| QH Kathleen Chambers Limited | Health & social care | 2020 |
| QH Management Service Ltd | Professional & scientific | 2019 |
| QH Park Lane Ltd | Hospitality | 2019 |
| QH ST Mary's Limited | Health & social care | 2019 |
| Qian Limited | Hospitality | 2016 |
| QJC Properties Ltd | Real estate | 2023 |
| QJC Services Ltd | Transport & logistics | 2018 |
| QJS Electrics Ltd | Construction | 2025 |
| Qlty Health Group Limited | Wholesale & retail | 2016 |
| QM Building & Construction Limited | Construction | 2017 |
| Qmec Limited | Construction | 2012 |
| Qmecx Ltd | Wholesale & retail | 2020 |
| QMH Motors Limited | Wholesale & retail | 2020 |
| QMS ABC Ltd | Information & communication | 2012 |
| QR247 Ltd | Wholesale & retail | 2020 |
| QRF Limited | Information & communication | 2017 |
| Qshop Ltd | Wholesale & retail | 2019 |
| Quad M Limited | Transport & logistics | 2010 |
| Quadir Design Limited | Information & communication | 2025 |
| Quadrin Financial Services Ltd | Professional & scientific | 2014 |
| Quadruple Investments Limited | Other services | 2021 |
| Quads Technologies Limited | Information & communication | 2025 |
| Qualitas Healthcare Limited | Health & social care | 2020 |
| Qualites London Limited | Wholesale & retail | 2021 |
| Quality Compliance Company Limited | Transport & logistics | 2025 |
| Quality Cuisine (South West) Limited | Manufacturing | 2010 |
| Quality Leaders in Care Limited | Administrative & support | 2022 |
| Quality Portable Garages Ltd | Manufacturing | 2006 |
| Quality Quartz and Granite Ltd | Construction | 2019 |
| Quality Utilities Limited | Wholesale & retail | 2023 |
| Quality.Ai Ltd | Information & communication | 2026 |
| Quantum - 1 Services Ltd | Administrative & support | 2013 |
| Quantum Cryptonics Ltd | Financial services | 2024 |
| Quantum Equity Ltd | Households | 2022 |
| Quantum Estates Ltd | Real estate | 2026 |
| Quantum HR Ltd | Professional & scientific | 2019 |
| Quantum Sky Ltd | Information & communication | 2017 |
| Quantum SP Solutions Ltd | Information & communication | 2024 |
| Quantum Tutoring Ltd | Education | 2025 |
| Quasmo Limited | Health & social care | 2021 |
| Quentra Property Group Ltd | Real estate | 2025 |
| Quest Commercial Ltd | Professional & scientific | 2024 |
| Quest IT Limited | Information & communication | 2022 |
| Quest Security Ltd | Wholesale & retail | 2024 |
| Questover Limited | Wholesale & retail | 2017 |
| Quick & Easy Developments Ltd | Construction | 2018 |
| Quick and Easy Services Ltd | Real estate | 2022 |
| Quick Export Trading Co Ltd | Wholesale & retail | 2025 |
| Quick FIX Communications Ltd | Wholesale & retail | 2019 |
| Quick Heat and Cooling Ltd | Construction | 2023 |
| Quick Heat UK Ltd | Construction | 2020 |
| Quick Pick-Ups Ltd | Transport & logistics | 2026 |
| Quick Recovery 247 Limited | Wholesale & retail | 2018 |
| Quick Repairs Expert Limited | Construction | 2018 |
| Quick Think Management Ltd | Professional & scientific | 2026 |
| Quick Wash Laundrette Ltd | Other services | 2023 |
| Quickars Limited | Wholesale & retail | 2003 |
| Quickfix Vehicle Services Ltd | Wholesale & retail | 2025 |
| Quickpath Recruiters Ltd | Administrative & support | 2025 |
| Quickpulse Ltd | Wholesale & retail | 2024 |
| Quickride Car Ltd | Transport & logistics | 2026 |
| Quickship Global Express Ltd | Transport & logistics | 2025 |
| Quickstep Burnham Limited | Wholesale & retail | 2022 |
| Quickwash Launderette & Drycleaner Ltd | Other services | 2022 |
| Quilon Solutions Ltd | Transport & logistics | 2020 |
| Quin 4 Limited | Real estate | 2023 |
| Quran Club Global Ltd | Information & communication | 2025 |
| Quran Noor Diamond Limited | Education | 2022 |
| Quranicapps Ltd | Information & communication | 2024 |