| Quantum Solutions Merton Limited | Construction | 2012 |
| Quantum World Limited | Professional & scientific | 2016 |
| Quattro Flooring Ltd | Construction | 2009 |
| Qubit Data Ltd | Information & communication | 2025 |
| Quick FIX Auto Body Repair Limited | Wholesale & retail | 2018 |
| Quick FIX London Body Repair Ltd | Wholesale & retail | 2020 |
| Quick Force Limited | Administrative & support | 2017 |
| Quick Properties Ltd | Real estate | 2025 |
| Quomatic Solution Limited | Information & communication | 2014 |
| Qureshi Global Limited | Wholesale & retail | 2026 |
| Qurwerk Ltd | Health & social care | 2022 |
| Qwazzo OIL Services Ltd | Administrative & support | 2013 |
| QZ Food & Catering Ltd | Hospitality | 2024 |
| R & R Car Services Ltd | Wholesale & retail | 2022 |
| R a Renovation Ltd | Construction | 2016 |
| R C Mcpherson and SON Ltd | Construction | 2026 |
| R Fibre Solutions Ltd | Information & communication | 2017 |
| R Living Limited | Real estate | 2009 |
| R&J777 Trading Ltd | Wholesale & retail | 2021 |
| R&T Cleaning Services Ltd | Administrative & support | 2019 |
| R.M UK Medical Services Limited | Health & social care | 2013 |
| R.S Trading London Ltd | Wholesale & retail | 2016 |
| R24 Way Ltd | Information & communication | 2019 |
| R2S (Road to Success) Limited | Education | 2012 |
| R2S Franchise Limited | Education | 2020 |
| RA Cooling Ltd | Construction | 2024 |
| Raab Trading Ltd | Wholesale & retail | 2017 |
| Rabars Barbers Ltd | Other services | 2020 |
| Rabbit Nova Trading Limited | Wholesale & retail | 2025 |
| Rabin 65 Limited | Construction | 2023 |
| Race Production Ltd | Information & communication | 2018 |
| Radian Co Ltd | Administrative & support | 2016 |
| Radio Bros Ltd | Information & communication | 2020 |
| Radionov Construction Ltd | Construction | 2017 |
| Radley Cornhill LLP | | 2024 |
| Rafidain Group Limited | Information & communication | 2019 |
| Raheesh Travel Ltd | Transport & logistics | 2026 |
| Rahim & Sons Trading and Contracting Company Ltd | Construction | 2026 |
| Rahimi Pizza Shop Limited | Hospitality | 2016 |
| Rahin Indian Takeaway Ltd | Hospitality | 2019 |
| RAI London Limited | Wholesale & retail | 2009 |
| RAI Trading Ltd | Transport & logistics | 2019 |
| RAK Trading Ltd | Transport & logistics | 2019 |
| Raks Trading Ltd | Transport & logistics | 2023 |
| Ram&Raj Ltd | Real estate | 2023 |
| Ramal SR Limited | Transport & logistics | 2024 |
| Ramali UK Limited | Manufacturing | 2023 |
| Ramelon Limited | Wholesale & retail | 2023 |
| Ramoos Trading Limited | Wholesale & retail | 2025 |
| Rana Property Solutions Ltd | Wholesale & retail | 2024 |
| Ranas Group Ltd | Wholesale & retail | 2026 |
| Ranb Ltd | Transport & logistics | 2018 |
| Rani Property Developments Limited | Real estate | 2024 |
| Ransom Art Limited | Wholesale & retail | 2005 |
| Ranya Barber Limited | Other services | 2016 |
| Ranya VIP Barber Ltd | Other services | 2025 |
| RAO Builders Merchant Ltd | Wholesale & retail | 2022 |
| RAO Constructions (Raocon) Ltd | Construction | 2022 |
| RAO Holds Ltd | Financial services | 2022 |
| RAO Homes London Ltd | Real estate | 2022 |
| Rapid Plumbing & Heating Ltd | Construction | 2003 |
| Rapid Readymix Concrete Ltd | Wholesale & retail | 2018 |
| Rapidus Services Ltd | Wholesale & retail | 2019 |
| Rappio Ltd | Construction | 2025 |
| RAR Media Limited | Extraterritorial | 2012 |
| Rare Piece Limited | Wholesale & retail | 2022 |
| Raremovers Limited | Transport & logistics | 2025 |
| Rashid Food Centre Ltd | Wholesale & retail | 2013 |
| RAT Trading Ltd | Transport & logistics | 2019 |
| Raval Social Media Ltd | Information & communication | 2025 |
| Ravensbury 2123 Limited | Real estate | 2023 |
| Ravensent Ltd | Information & communication | 2025 |
| Ravrup Limited | Health & social care | 2025 |
| Rawabi Najd Clearing & Forwarding Limited | Transport & logistics | 2024 |
| Rawfir UK Ltd | Agriculture & fishing | 2022 |
| Raynex Healthcare Limited | Health & social care | 2022 |
| Rayzal Express Limited | Wholesale & retail | 2023 |
| Raza Trading Ltd | Transport & logistics | 2024 |
| Rbliss Ltd | Financial services | 2024 |
| RCL Services Ltd | Construction | 2016 |
| Real Equity Holdings Ltd | Financial services | 2025 |
| Real Time Systems LLP | | 2009 |
| Realty Experts Real Estate Brokers Ltd | Real estate | 2025 |
| Realty Gold World Limited | Other services | 2010 |
| Rebel Europe Ltd | Manufacturing | 2023 |
| Rebet Training & Staffing Ltd | Administrative & support | 2025 |
| Receibo Ltd | Information & communication | 2025 |
| Red FOX Research Limited | Professional & scientific | 2019 |
| Red Properties London Limited | Real estate | 2015 |
| Red Rhum Ltd | Wholesale & retail | 2025 |
| Red Robins Montessori Ltd | Administrative & support | 2007 |
| Red Sheep Ltd | Professional & scientific | 2005 |
| Red Tiger Heavy Equipment Rental UK Limited | Wholesale & retail | 2023 |
| Red-Sea International UK Ltd | Wholesale & retail | 2024 |
| Redland Builders London Ltd | Construction | 2018 |
| Redwell Medical Ltd | Health & social care | 2025 |
| Redwood Management Services Limited | Extraterritorial | 2016 |
| Reem UK Trading Ltd | Health & social care | 2023 |
| Regal Abode Selcroft Ltd | Construction | 2019 |
| Regal Eagle Limited | Professional & scientific | 2015 |