| Pyper's Properties Ltd | Real estate | 2025 |
| Pyramids Fast Food Ltd | Other services | 2017 |
| Pyraxis Technologies Ltd | Public administration | 2025 |
| Pz.Eng.Services Ltd | Manufacturing | 2021 |
| Q C Enterprises Limited | Hospitality | 1994 |
| Q C Functions Limited | Hospitality | 2024 |
| Q C Trading Limited | Wholesale & retail | 2023 |
| Q College Property Limited | Energy | 1993 |
| Q Communications Limited | Information & communication | 1993 |
| Q Digital Consult Ltd | Other services | 2023 |
| Qaixen Limited | Information & communication | 2017 |
| Qaradakh Ltd | Transport & logistics | 2026 |
| QAS Aviation Ltd | Manufacturing | 2023 |
| QAW Services Ltd | Information & communication | 2017 |
| QC Pro Trading Company Ltd | Wholesale & retail | 2024 |
| Qdem Pharmaceuticals Limited | Wholesale & retail | 2011 |
| Qdsh Property Ltd | Real estate | 2025 |
| QE Football Academy Ltd | Arts & recreation | 2024 |
| Qedra Ceylon Ltd | Wholesale & retail | 2026 |
| Qefc C.I.C. | Arts & recreation | 2022 |
| Qhuk Europe Co., Limited | Extraterritorial | 2018 |
| Qian Bay Technology Co., Ltd | Manufacturing | 2025 |
| Qicheng Import and Export Co., Ltd | Extraterritorial | 2021 |
| Qilasaaz Limited | Wholesale & retail | 2002 |
| Qingcheng (UK) Cosmetics Co., Ltd | Manufacturing | 2025 |
| Qingdao BON Voyage Marine Engineering Co., Ltd | Wholesale & retail | 2023 |
| Qingdao Jahung Conveyor Belt Co., Ltd | Manufacturing | 2021 |
| Qingdao Jinbo Jewelry Co., Ltd | Extraterritorial | 2015 |
| Qingdao Meiwei Jeweiry Co., Ltd | Professional & scientific | 2013 |
| Qingdao New Bizlink Industry Co., Ltd | Extraterritorial | 2015 |
| Qingdao Smartway Commercial Co., Ltd | Wholesale & retail | 2018 |
| Qingdao Tlead International Co., Ltd | Extraterritorial | 2022 |
| Qiongyuan Trading Co., Ltd | Wholesale & retail | 2022 |
| Qixuan Technology Ltd. | Information & communication | 2025 |
| QK Metal Products Co., Ltd | Manufacturing | 2024 |
| Qkine Limited | Professional & scientific | 2016 |
| QPE (Cambridge) Ltd | Manufacturing | 2011 |
| QR Shield Ltd | Administrative & support | 2020 |
| Qrve Limited | Professional & scientific | 2026 |
| QT Holdings Ltd | Financial services | 2020 |
| QTP | | 1999 |
| Qtrace Ltd | Information & communication | 2021 |
| Quadrangle Limited | Agriculture & fishing | 1983 |
| Quadro Epsom Limited | Professional & scientific | 2006 |
| Quahoag Estates Ltd | Real estate | 2011 |
| Quakesoft Ltd | Information & communication | 2017 |
| Qualcomm Auto Ltd. | Information & communication | 2024 |
| Qualcomm Technologies International, Ltd. | Information & communication | 1998 |
| Qualcomm UK International Technologies Holdings Ltd. | Financial services | 2024 |
| Qualcomm UK International Technologies Ltd. | Financial services | 2024 |
| Qualifications in Fitness Ltd | Education | 2021 |
| Quality Assured Audits Ltd | Administrative & support | 2022 |
| Quality Care Cleaning Limited | Administrative & support | 2005 |
| Quality Cleaning Cambridge Ltd | Administrative & support | 2020 |
| Quality Driven Ltd | Professional & scientific | 2012 |
| Quality DRY Cleaning Trading (UK) Limited | Other services | 2015 |
| Quality Street IND Limited | Transport & logistics | 2025 |
| Quality World Foods Limited | Wholesale & retail | 2016 |
| Qualitycaregp Ltd | Health & social care | 2024 |
| Quandongfa Ltd | Extraterritorial | 2023 |
| Quanstar Intelligent Controls (Shanghai) Co., Ltd | Manufacturing | 2025 |
| Quantbox Research UK Ltd | Information & communication | 2023 |
| Quantonova Limited | Manufacturing | 2023 |
| Quantum Blockchain Ltd | Information & communication | 2012 |
| Quantum Commercial Cleaning Limited | Administrative & support | 2017 |
| Quantum Entangled Technologies Ltd | Information & communication | 2023 |
| Quantum Health Analytics (UK) Ltd | Health & social care | 2022 |
| Quantum Healthcare Fund NO. 2 Limited Partnership | | 1998 |
| Quantum Leap Group Limited | Information & communication | 1996 |
| Quantum Power Transformation Limited | Professional & scientific | 2019 |
| Quantum Scaling Ltd | Professional & scientific | 2025 |
| Quantumsilica Micro Ltd | Manufacturing | 2025 |
| Quantumverse Ltd | Information & communication | 2022 |
| Quanzhou Chuangyi Industrial Ltd | Extraterritorial | 2015 |
| Quartix Technologies PLC | Manufacturing | 2007 |
| Quasnet Ltd | Information & communication | 2024 |
| Quatradis Ltd | Real estate | 2026 |
| Quaylink Trade Limited | Wholesale & retail | 2025 |
| Qube Dynamics Limited | Manufacturing | 2024 |
| Qubitera Ltd | Information & communication | 2025 |
| Quebec Building Manchester (UK) Ltd | Real estate | 2022 |
| Queen Mary Digital Limited | Education | 2016 |
| Queensberry Heights Management Company Limited | Households | 2007 |
| Queensberry Residents Company Limited | Households | 2004 |
| Queensgate Instruments Limited | Manufacturing | 2025 |
| Quendon Consulting Limited | Financial services | 2012 |
| Quest Office Property Limited | Real estate | 2011 |
| Quest Perspective Limited | Education | 2016 |
| Quest Renovation Limited | Construction | 2022 |
| Quest Renovation Properties Limited | Construction | 2026 |
| Questevery Limited | Real estate | 1993 |
| Questor Property Ventures Ltd | Real estate | 2019 |
| Questor Ventures Limited | Professional & scientific | 2013 |
| Quibim Limited | Information & communication | 2022 |
| Quick Cartify Ltd | Wholesale & retail | 2026 |
| Quick Management & Facilities Solutions Limited | Professional & scientific | 2024 |
| Quick Placement Tests Limited | Education | 2001 |
| Quickcab Ltd | Transport & logistics | 2023 |
| Quickpure Limited | Agriculture & fishing | 1997 |
| Quickwash Limited | Other services | 2019 |