| Quantus IT Solutions Ltd | Information & communication | 2009 |
| Quarry B Enterprises Ltd | Health & social care | 2005 |
| Quartz Designs Limited | Professional & scientific | 2023 |
| Quartz Portfolio Limited | Real estate | 2022 |
| Quartz Property Services Limited | Households | 2023 |
| Qubytecode Limited | Information & communication | 2021 |
| Qucake Limited | Real estate | 2021 |
| Qudsia Trading Limited | Wholesale & retail | 2025 |
| Queen's House Consulting Limited | Professional & scientific | 2016 |
| Queensborough Estates Limited | Real estate | 2025 |
| Queensbury Drycleaners & Launderette Limited | Other services | 2022 |
| Queensgate Hotel Edinburgh GP Ltd | Financial services | 2015 |
| Queensgate Hotel Edinburgh Ltd | Hospitality | 2015 |
| Queensgate Hotel Limited | Hospitality | 2008 |
| Quemo Entertainment Limited | Manufacturing | 2013 |
| Queslett Developments (West Mids) Ltd | Construction | 2020 |
| Questnet Limited | Real estate | 2013 |
| Questville Limited | Extraterritorial | 2011 |
| Qugen Limited | Professional & scientific | 2004 |
| Quib Limited | Professional & scientific | 2024 |
| Quick Bites Express Ltd | Hospitality | 2024 |
| Quick Cars Hire Ltd | Administrative & support | 2026 |
| Quick Finance Limited | Financial services | 2023 |
| Quick Fit Safety Belt Service Limited(The) | Professional & scientific | 1962 |
| Quick Fitt Ltd | Construction | 2025 |
| Quick Picks (UK) Limited | Wholesale & retail | 2012 |
| Quick Rubbish Ltd | Water & waste | 2025 |
| Quick Shiny Valeting Limited | Wholesale & retail | 2025 |
| Quick Waste Management Ltd | Water & waste | 2024 |
| Quickcart Ltd | Information & communication | 2017 |
| Quickfit Safety Belt Services Ltd | Manufacturing | 2014 |
| Quickfix Mobile Auto Ltd | Wholesale & retail | 2025 |
| Quickiezz Ltd | Hospitality | 2025 |
| Quickoo Transfer Private Limited | Transport & logistics | 2025 |
| Quidflow Group Ltd | Administrative & support | 2025 |
| Quiet Films Limited | Professional & scientific | 2019 |
| Quillbranch Limited | Real estate | 1999 |
| Quinn's Collection Limited | Professional & scientific | 2025 |
| Quinn's Electrical Services Ltd | Construction | 2020 |
| Quinns Hotel Limited | Real estate | 1987 |
| Quinowa Ltd | Information & communication | 2015 |
| Quintaris Limited | Information & communication | 2026 |
| Quortis Group Limited | Wholesale & retail | 2020 |
| Quotidiann Ltd | Other services | 2016 |
| Quranly Ltd | Information & communication | 2020 |
| Qureshi Foods Ltd | Hospitality | 2020 |
| Quronfleh Limited | Hospitality | 2015 |
| QW Times Ltd | Real estate | 2024 |
| Qwickmarts Ltd | Wholesale & retail | 2025 |
| Qworld Ltd | Wholesale & retail | 2021 |
| Qysmat Limited | Other services | 2023 |
| R & a Distribution Ltd | Wholesale & retail | 2026 |
| R & B Shah Properties Limited | Real estate | 2025 |
| R & D Jewellers Limited | Wholesale & retail | 2013 |
| R & K Distributors Limited | Wholesale & retail | 1992 |
| R & K Housing Services (UK) Limited | Real estate | 2025 |
| R & K Management Ltd | Real estate | 2017 |
| R & N Lettings and Development Ltd | Real estate | 2023 |
| R & P Hardware & D.I.Y Ltd | Wholesale & retail | 2019 |
| R & R Global Trading Ltd | Administrative & support | 2017 |
| R & R Global Trading Properties Limited | Construction | 2023 |
| R & R Hub Limited | Hospitality | 2025 |
| R & R Retail UK Limited | Wholesale & retail | 2007 |
| R & S Accountancy Services Ltd | Professional & scientific | 2011 |
| R & S Vape Ltd | Wholesale & retail | 2025 |
| R + G Construction Ltd | Construction | 2002 |
| R a K V Supreme Limited | Real estate | 2010 |
| R and F Builders Limited | Construction | 2015 |
| R and R Team Ltd | Transport & logistics | 2013 |
| R and S Medical and Allied Services Limited | Administrative & support | 2001 |
| R Banner Limited | Other services | 2016 |
| R D & Sons Properties Limited | Real estate | 2020 |
| R D J Shutters Ltd | Construction | 2004 |
| R Dean Ltd | Health & social care | 2024 |
| R Fernandez Locum Services Ltd | Health & social care | 2022 |
| R Foundation | Other services | 2018 |
| R Group&Co Ltd | Wholesale & retail | 2019 |
| R H Healthcare Limited | Professional & scientific | 2022 |
| R Hall Developments Limited | Construction | 2015 |
| R Heath Motors Harrow Ltd. | Wholesale & retail | 2020 |
| R J'S Industries Limited | Manufacturing | 2001 |
| R K & P Consultants Limited | Professional & scientific | 2013 |
| R K & P Holdings Limited | Financial services | 2019 |
| R K Builder & Shopfitters Ltd | Construction | 2025 |
| R K Creates Ltd | Wholesale & retail | 2025 |
| R K Haulage Limited | Transport & logistics | 2016 |
| R K Pardesi Limited | Health & social care | 2023 |
| R K Residence Ltd | Real estate | 2021 |
| R Kells Ltd | Construction | 2021 |
| R L Kankate Limited | Real estate | 2009 |
| R Lloyd Williams Limited | Health & social care | 2004 |
| R M Saraiya Ltd | Wholesale & retail | 2025 |
| R N K Construction Limited | Construction | 2025 |
| R O H Architecture Limited | Professional & scientific | 2010 |
| R Properties Limited | Financial services | 2018 |
| R R (Green Street) Ltd | Real estate | 2019 |
| R S & Grandsons Limited | Real estate | 2022 |
| R Shahid Ltd | Health & social care | 2016 |
| R Shree Ltd | Transport & logistics | 2011 |
| R Thakerar Ltd | Health & social care | 2025 |