| Qtech Control Limited | Professional & scientific | 2012 |
| Quad Circle Computing Limited | Professional & scientific | 2024 |
| Quadmind Brazil Ltd | Wholesale & retail | 2025 |
| Quadrant Architecture Limited | Professional & scientific | 1996 |
| QUADRANT2DESIGN Limited | Extraterritorial | 2007 |
| Quaff and Tipple Ltd | Wholesale & retail | 2019 |
| Quality Care Matters (SW) Limited | Extraterritorial | 2013 |
| Quality Carpets and Flooring LLP | | 2012 |
| Quality Fireplace Fitting Services Ltd | Wholesale & retail | 2025 |
| Quality Flex Ltd | Wholesale & retail | 2022 |
| Quality Home Enhancements Ltd | Information & communication | 2022 |
| Quality Life Bathrooms Limited | Construction | 2022 |
| Quality Residential Ltd | Real estate | 2010 |
| Quantara X Limited | Education | 2025 |
| Quantina Intelligence Limited | Information & communication | 2013 |
| Quantina Ltd. | Wholesale & retail | 2018 |
| Quantix Prime Ltd | Information & communication | 2025 |
| Quantom Nabula Ltd | Wholesale & retail | 2025 |
| Quantum Assessment Limited | Professional & scientific | 2012 |
| Quantum Canary Limited | Professional & scientific | 2025 |
| Quantum Chiropractic Ltd | Health & social care | 2017 |
| Quantum Dynamics Limited | Manufacturing | 1990 |
| Quantum LEO Limited | Health & social care | 2015 |
| Quantum Lifecare Recruitment LLP | | 2009 |
| Quantum Payroll Services Ltd | Other services | 2022 |
| Quantumhub Solutions Limited | Information & communication | 2025 |
| Quartz Estate Agents Ltd | Real estate | 2025 |
| Quasi & Squatch Ltd | Wholesale & retail | 2023 |
| Quattro Motor Company Ltd | Wholesale & retail | 2018 |
| Quay Boats Limited | Extraterritorial | 1979 |
| Quay Care (Poole) Limited | Health & social care | 2015 |
| Quay Care Limited | Health & social care | 2016 |
| Quay Chemicals Limited | Other services | 2020 |
| Quay Health Group Limited | Other services | 2019 |
| Quay Health International Limited | Health & social care | 2019 |
| Quay Health Limited | Health & social care | 2019 |
| Quay Holidays (Poole) Limited | Hospitality | 2025 |
| Quay Holidays LLP | | 2006 |
| Quay Living Limited | Real estate | 2010 |
| Quay Medical Care Limited | Health & social care | 2006 |
| Quay Rackets Limited | Wholesale & retail | 2025 |
| Quay West Apartments RTM Company Ltd | Households | 2022 |
| Quay West Limited | Wholesale & retail | 2004 |
| Quay West Marina Limited | Extraterritorial | 1977 |
| Quay West Marine Limited | Wholesale & retail | 2024 |
| Quayside Carpentry Ltd | Construction | 2026 |
| Quayside Poole Limited | Hospitality | 2010 |
| Quaywest Properties Ltd | Real estate | 2021 |
| Queens Gardens (Bournemouth) Management Company Limited | Households | 1979 |
| Quentium Ltd | Information & communication | 2026 |
| Queserasera.Clothing Limited | Wholesale & retail | 2023 |
| Quest Gift Shops Limited | Real estate | 1975 |
| Quest Guardians Limited | Education | 2002 |
| Quest Land Limited | Other services | 2019 |
| Quick Fleet Logistics Ltd | Wholesale & retail | 2025 |
| Quick Walls Ltd | Construction | 2018 |
| Quickbuy BR Limited | Wholesale & retail | 2025 |
| Quiet Days Skincare Ltd | Manufacturing | 2026 |
| Quiet Mark Approval Limited | Professional & scientific | 2012 |
| Quiet Mark International Limited | Administrative & support | 2015 |
| Quietly Sourced Limited | Information & communication | 2026 |
| Quincey Developments Ltd | Construction | 2024 |
| Quintessential Care Matters LLP | | 2019 |
| Quna Holdings Ltd | Financial services | 2026 |
| Quostar Solutions Limited | Information & communication | 2004 |
| Qupro Holdings Limited | Real estate | 2022 |
| Qurb Ltd | Information & communication | 2014 |
| Qwaiting (UK) Limited | Professional & scientific | 2009 |
| QWX Software Ltd | Information & communication | 2026 |
| R & E Bugler Ltd | Construction | 2009 |
| R & J Moors Limited | Other services | 2008 |
| R & M Estates Limited | Construction | 2016 |
| R & M Mechanical & Lifting Services Ltd | Manufacturing | 2015 |
| R & R James Properties Ltd | Real estate | 2021 |
| R a Barker Ltd | Professional & scientific | 2025 |
| R B Autocare Limited | Wholesale & retail | 1990 |
| R E Films Ltd | Professional & scientific | 2022 |
| R G S Investments Limited | Manufacturing | 1989 |
| R G Sales Limited | Construction | 2019 |
| R H Bournemouth Properties Ltd | Real estate | 2021 |
| R H Roofing (Southern) Limited | Construction | 2024 |
| R H Scaffolding (Bournemouth) Limited | Construction | 2025 |
| R I M Sales Ltd | Administrative & support | 2023 |
| R J G Tiling Limited | Construction | 2014 |
| R Jeffrey Ltd | Construction | 2009 |
| R Khan Limited | Health & social care | 2025 |
| R M Walford Ltd | Construction | 2015 |
| R P H Manufacturing Limited | Manufacturing | 2009 |
| R Poonia Ltd | Health & social care | 2021 |
| R S Property Solutions Limited | Real estate | 2003 |
| R S S (Wessex) Limited | Administrative & support | 2003 |
| R Steinauer Ltd | Real estate | 2021 |
| R V T IT Infrastructure Ltd. | Information & communication | 2024 |
| R W Carpentry - Fitted Furniture Ltd | Construction | 2025 |
| R&A Care Holding Ltd | Professional & scientific | 2023 |
| R&B Kiosk Limited | Hospitality | 2025 |
| R&Dn Empreendimentos Limited | Wholesale & retail | 2025 |
| R&Drake Ltd | Professional & scientific | 2026 |
| R&R Educational Solutions Ltd | Information & communication | 2023 |
| R&R Treatment Services Limited | Other services | 2019 |