| Quality Class Limited | Wholesale & retail | 2019 |
| Quality Dental Care Limited | Health & social care | 2008 |
| Quality Food and Service Limited | Administrative & support | 2021 |
| Quality Granite Limited | Manufacturing | 2017 |
| Quality Hair Designs Ltd | Other services | 2014 |
| Quality Home Maintenance Ltd | Construction | 2020 |
| Quality Ideas Construction Ltd | Construction | 2022 |
| Quality Marble Granite Ltd | Manufacturing | 2014 |
| Quality Removal Team Limited | Transport & logistics | 2015 |
| Quality Repairs Ltd | Construction | 2019 |
| Quang HUY Limited | Wholesale & retail | 2019 |
| Quantampulse IT Solutions Ltd | Information & communication | 2025 |
| Quantum Point Ltd | Real estate | 2022 |
| Quartis Consulting Ltd | Information & communication | 2022 |
| Quartz by RT Stone Limited | Manufacturing | 2017 |
| Quasyn Limited | Information & communication | 2025 |
| Queens Castles Ltd | Construction | 2024 |
| Quest Consultants (Accountants) Limited | Professional & scientific | 2001 |
| Quest Enterprise Ltd | Construction | 2016 |
| Quest JV Ltd | Construction | 2018 |
| Quest Protection Ltd | Administrative & support | 2009 |
| Quetta Restaurant Ltd | Hospitality | 2025 |
| Quick Motor Group Ltd | Wholesale & retail | 2024 |
| Quick Move in Ltd | Real estate | 2024 |
| Quick Pickz Limited | Wholesale & retail | 2025 |
| Quick Ripple Trading Ltd | Wholesale & retail | 2023 |
| Quick Route Dispatch Ltd | Transport & logistics | 2024 |
| Quick Tyre Shop Ltd | Wholesale & retail | 2026 |
| Quickeasylabour Ltd | Construction | 2024 |
| Quicklinkrepairs Ltd | Other services | 2025 |
| Quikimart Limited | Wholesale & retail | 2025 |
| Quinta Properties Ltd | Real estate | 2024 |
| Quintex (UK) Limited | Other services | 1985 |
| Quinton Vorster Ltd | Administrative & support | 2010 |
| Quizer Store Ltd | Wholesale & retail | 2024 |
| Quorum Services Limited | Professional & scientific | 2018 |
| Quota Rise Ltd | Professional & scientific | 2025 |
| Qureshi Traders UK Ltd | Wholesale & retail | 2019 |
| Qutone Venturescera Ltd | Wholesale & retail | 2018 |
| Qwash Ltd | Administrative & support | 2025 |
| Qwikgig Ltd | Information & communication | 2024 |
| R & D Professional Services Limited | Administrative & support | 2017 |
| R & D Residencies Ltd | Real estate | 2023 |
| R & G Healthcare Limited | Wholesale & retail | 2025 |
| R & JAY Properties Ltd | Real estate | 2019 |
| R & M Construction (London) Ltd | Construction | 2022 |
| R & O Construction Ltd | Construction | 2019 |
| R & R Marques Ltd | Real estate | 2019 |
| R - Energy Found Ltd | Other services | 2019 |
| R and R ALI Brothers Limited | Other services | 2024 |
| R Cafe Limited | Hospitality | 2026 |
| R Campion Limited | Administrative & support | 2025 |
| R Contracting Services Ltd | Administrative & support | 2025 |
| R Cryan Limited | Other services | 2009 |
| R F Pro Painters Limited | Construction | 2026 |
| R Finpak Limited | Professional & scientific | 2005 |
| R Jani Property Limited | Real estate | 2026 |
| R K D Properties Ltd | Real estate | 2024 |
| R K London Ltd | Real estate | 2014 |
| R N R Properties (Reading) Limited | Households | 2004 |
| R S Construction (Surrey) Limited | Construction | 2017 |
| R S Hairstylist Ltd | Other services | 2023 |
| R S Interiors London Limited | Construction | 2010 |
| R Wasielewski Ltd | Transport & logistics | 2021 |
| R&G Engineering Limited | Construction | 2022 |
| R&M Properties Limited | Real estate | 2022 |
| R&Sb Ltd | Wholesale & retail | 2020 |
| R&T Loyalty Property Services Limited | Real estate | 2025 |
| R&T Wholesale Ltd | Wholesale & retail | 2025 |
| R&V Consultancy Ltd | Other services | 2020 |
| R.J Prime Ltd | Wholesale & retail | 2026 |
| R44 Performance Limited | Wholesale & retail | 2019 |
| RA Property Services London Limited | Real estate | 2019 |
| Raamkanth Ltd | Health & social care | 2016 |
| RAB Network Limited | Wholesale & retail | 2023 |
| Rabbaa Ltd | Wholesale & retail | 2025 |
| Rabbit Driver Ltd | Transport & logistics | 2020 |
| Rabbit Track Pictures Limited | Information & communication | 2019 |
| Race of Giants Ltd | Information & communication | 2003 |
| Rachel Consult Ltd | Professional & scientific | 2019 |
| Rachel Riley Design Limited | Wholesale & retail | 2016 |
| Rachel Riley Limited | Wholesale & retail | 1997 |
| Racovita Limited | Construction | 2007 |
| Radeon Limited | Professional & scientific | 2013 |
| Radha Solutions Ltd | Information & communication | 2020 |
| Radhefoodandpanhouse Limited | Hospitality | 2023 |
| Radhey Limited | Real estate | 2019 |
| Radiant Vibe Services Limited | Administrative & support | 2026 |
| Radon Shipping Limited | Transport & logistics | 2024 |
| Radu Investment Ltd | Real estate | 2022 |
| RAE of Sunshine CIC | Information & communication | 2024 |
| Raei & Co. Payroll Services Limited | Professional & scientific | 2002 |
| Raei Alvin & Co Ltd | Professional & scientific | 2020 |
| RAF Scaff Ltd | Construction | 2019 |
| Rafi Trading Ltd | Wholesale & retail | 2026 |
| Rafia by Tasneem Ltd | Wholesale & retail | 2019 |
| Rafidiconsultant Limited | Professional & scientific | 2023 |
| Rafique Trading Ltd | Wholesale & retail | 2025 |
| Rafkins (Doncaster) Leisure Park Limited | Real estate | 2020 |
| Rafkins (J27 Leeds) Leisure Park Limited | Real estate | 2020 |