| Qikk Network Solutions Ltd | Information & communication | 2019 |
| Qnora London Ltd | Manufacturing | 2021 |
| Qorane Ltd | Transport & logistics | 2025 |
| QR Health and Wellbeing Ltd | Health & social care | 2022 |
| QR Music Ltd | Wholesale & retail | 2025 |
| QR Tyre Limited | Wholesale & retail | 2026 |
| Quad Construction Ltd | Construction | 2019 |
| Qualfast Construction Ltd | Construction | 2016 |
| Quality Aviation Ltd | Manufacturing | 2022 |
| Quality Foods Online Ltd | Wholesale & retail | 2020 |
| Quality IT Drylining Ltd | Construction | 2018 |
| Quantum Global IT Solutions Ltd | Information & communication | 2023 |
| Quantum Immigration Services Ltd | Professional & scientific | 2024 |
| Quantum UK Consultancy Ltd | Professional & scientific | 2023 |
| Quest Recovery Services Limited | Health & social care | 2016 |
| Quick Build Brick & Block Ltd | Construction | 2025 |
| Quick Car Rentals UK Ltd | Other services | 2016 |
| Quick Carpets Ltd | Construction | 2024 |
| Quick House Removals Ltd | Transport & logistics | 2019 |
| Quick Pest Control U.K Ltd | Administrative & support | 2013 |
| Quick Quack Services Ltd | Administrative & support | 2025 |
| Quick Rent a Car Ltd | Wholesale & retail | 2022 |
| Quick Service Transport Ltd | Transport & logistics | 2023 |
| Quick World Limited | Wholesale & retail | 2022 |
| Quick-Fit (Hayes) Limited | Other services | 1986 |
| Quickstart Care Ltd | Health & social care | 2024 |
| Quik Fit Hose & Fittings UK Limited | Wholesale & retail | 2019 |
| Quince Strategy Limited | Professional & scientific | 2024 |
| Quinix Ltd | Wholesale & retail | 2025 |
| Quintessential Building Ltd | Construction | 2025 |
| Quintessential Hire Ltd | Administrative & support | 2017 |
| R & B Heathrow Ltd | Real estate | 2022 |
| R & B UK Investment Ltd | Real estate | 2020 |
| R & Co. Properties Limited | Real estate | 2023 |
| R & G Direct Ltd | Wholesale & retail | 2016 |
| R & K Limited | Construction | 2023 |
| R & L Paul Ltd | Construction | 2011 |
| R C Electrical Contractor Ltd | Construction | 2004 |
| R G F Trading Ltd | Construction | 2020 |
| R Idris Ltd | Transport & logistics | 2020 |
| R K D Enterprises Ltd | Transport & logistics | 2014 |
| R K Daughter's Ltd | Real estate | 2026 |
| R K Design & Build Ltd | Construction | 2018 |
| R Mullen Brickwork Ltd | Construction | 2025 |
| R S Badhan Haulage Limited | Transport & logistics | 2014 |
| R S J Design and Build Ltd | Construction | 2026 |
| R S Khinda Constructions Ltd | Construction | 2013 |
| R Shimmer Ltd | Information & communication | 2024 |
| R Thind Construction Ltd | Construction | 2025 |
| R&B Supermarket Limited | Wholesale & retail | 2021 |
| R&M Dream Homes Limited | Real estate | 2025 |
| R&M Imitation Jewellery Ltd | Wholesale & retail | 2026 |
| R&P Sood Ltd | Transport & logistics | 2025 |
| R&R Consultany Limited | Information & communication | 2024 |
| R-Design Vehicle Solution Ltd | Wholesale & retail | 2018 |
| R. P. Businesses Ltd | Wholesale & retail | 2007 |
| R.A.M. Design Ltd | Construction | 2015 |
| R.F Developments Ltd | Real estate | 2024 |
| R.G. & Family Investment Ltd | Construction | 2019 |
| R.S. Builders (London) Ltd | Construction | 2020 |
| R14 Properties Ltd | Real estate | 2025 |
| R4M Housing Limited | Real estate | 2024 |
| R@Gs to Riches Ltd | Administrative & support | 2013 |
| RA Marina Group Ltd | Hospitality | 2017 |
| RA1 Ltd | Transport & logistics | 2025 |
| Raabi Modest Fashion Ltd | Wholesale & retail | 2017 |
| Raass London Ltd | Administrative & support | 2025 |
| Rabpreet Cosmetic Jewellery Ltd | Wholesale & retail | 2016 |
| Rachhpal Singh Ltd | Construction | 2025 |
| Rackspace Finance (UK) Holdings Ltd | Information & communication | 2024 |
| Rackspace Limited | Information & communication | 1999 |
| Radiant Electrical and Construction Services Ltd | Construction | 2021 |
| Radical Path Limited | Information & communication | 2018 |
| Radio Khushkhabri Limited | Information & communication | 2008 |
| Radisson Estates Limited | Real estate | 2023 |
| Radium Heating & Plumbing Ltd | Construction | 2023 |
| Rafael Services Ltd | Wholesale & retail | 2019 |
| Rafal Pluta Construction Ltd | Construction | 2026 |
| Raho Property Ltd | Real estate | 2020 |
| Rahul Saini Ltd | Construction | 2025 |
| RAI and Co UK Ltd | Professional & scientific | 2025 |
| RAI Freight Ltd | Transport & logistics | 2024 |
| Rainbow Carpenters Ltd | Manufacturing | 2023 |
| Raisa Property Limited | Real estate | 2025 |
| RAJ Builders SON1 Ltd | Construction | 2022 |
| RAJ Construction (UK) Limited | Construction | 2014 |
| RAJ Construction Services Limited | Construction | 2015 |
| RAJ Groceries & Wines Ltd | Wholesale & retail | 2020 |
| RAJ Investment Incorporation Limited | Real estate | 2024 |
| RAJ Kumar Saini Limited | Wholesale & retail | 2020 |
| RAJ KUMAR2 Ltd | Construction | 2025 |
| RAJ Panjab Records Ltd | Information & communication | 2023 |
| RAJ Shopfront Shutters Ltd | Manufacturing | 2014 |
| RAJ4 Ltd | Construction | 2026 |
| Raja 1 Motors Ltd | Wholesale & retail | 2020 |
| Rajab Limited | Households | 2010 |
| Rajesh Kumar Construction Ltd | Construction | 2019 |
| Rajo Solutions Ltd | Information & communication | 2018 |
| Rajveer Holding Limited | Financial services | 2025 |
| Rajwancee Retail Ltd | Wholesale & retail | 2025 |