| PW Law Limited | Professional & scientific | 2010 |
| PW Steel Erecting Ltd | Construction | 2018 |
| PW Transport Ltd | Transport & logistics | 2023 |
| PWM Drives Limited | Professional & scientific | 1984 |
| PWR Bristol Limited | Other services | 2024 |
| PWR Complete Building Services Limited | Construction | 2010 |
| PWR Developments (London RD) Limited | Construction | 2020 |
| PWR Endure Ltd | Hospitality | 2025 |
| PWS Consulting and Innovation Ltd | Information & communication | 2020 |
| PWT Builders Ltd | Construction | 2021 |
| Pxgeo Equipment Limited | Professional & scientific | 2021 |
| Pxgeo UK Limited | Professional & scientific | 2021 |
| Pxlrig Limited | Information & communication | 2013 |
| PXP Limited | Information & communication | 2001 |
| PY (Chapel) Limited | Construction | 2024 |
| PYM IFA Limited | Financial services | 2025 |
| Pyne Management Limited | Households | 1988 |
| Pyramid Catering Equipment Ltd | Wholesale & retail | 2010 |
| Pyramid Clothing Limited | Wholesale & retail | 2015 |
| Pyramid Furniture & Spraying Limited | Manufacturing | 2017 |
| Pyramid Mentoring Limited | Health & social care | 2017 |
| Pyramid Pipework Services Ltd | Construction | 2023 |
| Pyramid Plastering Contractors Ltd | Construction | 2022 |
| Pyramis Solutions Ltd | Professional & scientific | 2017 |
| Pyrochip Ltd | Information & communication | 2023 |
| Pyterra Limited | Information & communication | 2006 |
| Pyxis Technologies Ltd | Professional & scientific | 2016 |
| Pyxisys Group Limited | Extraterritorial | 2022 |
| PZ10 Ltd | Health & social care | 2023 |
| PZJ Executive Limited | Professional & scientific | 2014 |
| Q & C Carpentry and Joinery Ltd | Construction | 2020 |
| Q B Management Solutions Ltd | Real estate | 2019 |
| Q Parade Management Company Limited | Households | 2022 |
| Q Systems Global Limited | Information & communication | 2008 |
| Q TEX MEP Limited | Professional & scientific | 2023 |
| Q Training(Bristol) Limited | Education | 2012 |
| Q Works Ltd | Professional & scientific | 2017 |
| Q&A Holdings Ltd | Financial services | 2018 |
| Q&N Foods Limited | Hospitality | 2021 |
| Q-Veil Ltd | Information & communication | 2026 |
| Q. S. Powder Coaters Ltd | Manufacturing | 1983 |
| Q1 Decor Ltd | Construction | 2016 |
| Q10 Claims Solutions Ltd | Financial services | 2019 |
| Q21 Limited | Financial services | 2015 |
| Q4 Properties Limited | Other services | 2011 |
| Q5D Technologies Limited | Manufacturing | 2018 |
| QA Corporate Ltd. | Construction | 1991 |
| QA Dental Engineers Ltd | Extraterritorial | 2019 |
| QA Distribution Andover Limited | Transport & logistics | 2017 |
| QA Powerplus Limited | Extraterritorial | 2010 |
| QA Primo Limited | Professional & scientific | 2010 |
| QA Solutions (Associates) Ltd | Professional & scientific | 2015 |
| QA Workspace Limited | Extraterritorial | 2010 |
| Qa&Ra Certified Ltd | Professional & scientific | 2024 |
| Qa&Ra Consulting Ltd | Professional & scientific | 2020 |
| QAC Electrical Services Limited | Construction | 2011 |
| Qadoos & Sons Limited | Wholesale & retail | 2025 |
| QAF Cabaret Ltd | Arts & recreation | 2025 |
| Qalandari Estates Limited | Real estate | 2020 |
| Qalyx Ltd | Information & communication | 2025 |
| Qapital Consult Ltd | Professional & scientific | 2015 |
| QB Financials Ltd | Financial services | 2023 |
| Qbic Carpentry & Joinery Limited | Construction | 2007 |
| Qbic Construction Limited | Construction | 2007 |
| QBS (South-West) Limited | Construction | 2012 |
| QC 30 (Bristol) Management Limited | Real estate | 2005 |
| QC Glamorous Limited | Hospitality | 2026 |
| QCC Electrical Services Ltd | Extraterritorial | 2024 |
| QCH Limited | Real estate | 2013 |
| QD Technology Limited | Information & communication | 2019 |
| QDM Mortgages Ltd | Financial services | 2021 |
| Qebo Ltd | Information & communication | 2016 |
| QED Film & Stage Productions Ltd | Information & communication | 2011 |
| QED Global Ltd | Information & communication | 2013 |
| QEH Enterprises Ltd | Administrative & support | 2023 |
| QEH International Schools Limited | Education | 2017 |
| QEV Holdings Limited | Real estate | 2019 |
| QF Group Limited | Transport & logistics | 2023 |
| QFI Ltd | Construction | 2018 |
| Qforge Ltd | Information & communication | 2026 |
| QFQ Group Ltd | Extraterritorial | 2016 |
| QFQ Ltd | Extraterritorial | 2024 |
| QG Chen Properties Ltd | Real estate | 2022 |
| Qhawk Limited | Information & communication | 2014 |
| Qhservices Ltd | Administrative & support | 2025 |
| QI Clinic Ltd | Extraterritorial | 2009 |
| Qibar Ltd | Transport & logistics | 2018 |
| QKB Properties Ltd | Real estate | 2024 |
| Qleanup Limited | Administrative & support | 2018 |
| QLT Roofing & Building Ltd | Construction | 2022 |
| Qlts School Ltd | Extraterritorial | 2011 |
| QM Property Investments Ltd | Real estate | 2025 |
| QMS Bristol Ltd | Construction | 2021 |
| Qodify Ltd | Information & communication | 2025 |
| Qorone Limited | Manufacturing | 2020 |
| Qotouf Caffe Ltd | Other services | 2022 |
| QP - Services UK Limited | Professional & scientific | 2000 |
| QP Hotel Limited | Hospitality | 2024 |
| QR Operating Company Limited | Real estate | 2016 |
| QRM Consulting Ltd | Information & communication | 2019 |