| Quantum Trading Solutions Ltd | Wholesale & retail | 2024 |
| Quartz Homes Ltd | Real estate | 2023 |
| Quickpos Limited | Wholesale & retail | 2017 |
| R & M Property Rentals Limited | Real estate | 2008 |
| R G Matharu LLP | | 2023 |
| R Kaur Consultancy Ltd | Administrative & support | 2024 |
| R S Potter Limited | Information & communication | 2013 |
| R Stake Ltd | Professional & scientific | 2021 |
| R&H Group PVT Limited | Wholesale & retail | 2025 |
| R-Tech Consulting Limited | Information & communication | 2015 |
| R. & M. Rentals Limited | Administrative & support | 1976 |
| R.Mclelland Consulting Limited | Administrative & support | 2016 |
| RA Hub Ltd | Information & communication | 2019 |
| Raayzel Ltd | Professional & scientific | 2020 |
| Rabdeen Properties Limited | Real estate | 2019 |
| Racing Turtle Limited | Real estate | 2021 |
| Radbul Limited | Information & communication | 2014 |
| Radical Ratz Customs Limited | Wholesale & retail | 2023 |
| Raffa Portfolio Ltd | Real estate | 2026 |
| Raffa Property Ltd | Real estate | 2026 |
| Rafoli Limited | Construction | 2017 |
| Rahmani and Family Ltd | Real estate | 2021 |
| Railshead Commercial Limited | Real estate | 2018 |
| Railshead Holdings Limited | Real estate | 2021 |
| Railshead Offices Limited | Real estate | 2023 |
| Railshead Residential Limited | Real estate | 2022 |
| Rainbow Clinical Services Ltd | Health & social care | 2016 |
| Rainstone Haven Ltd | Real estate | 2023 |
| Raised System Floor Solution Ltd | Construction | 2018 |
| RAJ Commercial Holdings Limited | Real estate | 2025 |
| RAJ Residential Holdings Limited | Real estate | 2024 |
| Rajansh Ltd | Manufacturing | 2015 |
| Rajtech Consulting Services Limited | Information & communication | 2013 |
| RAM IT Services Ltd | Information & communication | 2026 |
| Ramson Healthcare Limited | Health & social care | 2015 |
| Ranco Limited | Wholesale & retail | 2023 |
| Rani's Diner Ltd | Manufacturing | 2024 |
| Raph&Remy UK Limited | Wholesale & retail | 2025 |
| Rapportalk Ltd | Professional & scientific | 2016 |
| Rathi Talent Partners Limited | Administrative & support | 2024 |
| Ratmuk Investment Ltd | Households | 2024 |
| Ravi Infotech Limited | Information & communication | 2014 |
| Rawpixels London Ltd | Information & communication | 2025 |
| Rayz Beauty Bar Limited | Other services | 2025 |
| RAZ Private Limited | Wholesale & retail | 2022 |
| Rbsd Developments Ltd | Real estate | 2025 |
| Rbsd Management Ltd | Real estate | 2025 |
| RCL Designs Ltd | Manufacturing | 2019 |
| RDC Investments Limited | Construction | 2018 |
| Re.Removal Ltd | Transport & logistics | 2025 |
| Readers and Writers Limited | Information & communication | 2020 |
| Real Estate PM Ltd | Professional & scientific | 2019 |
| Real World Education Limited | Education | 2022 |
| Realtime Innovations Ltd | Extraterritorial | 2024 |
| Rebecca Spencer Photography Ltd | Professional & scientific | 2016 |
| Rebel Eaters Ltd | Hospitality | 2020 |
| Recalibrate ME Ltd | Wholesale & retail | 2020 |
| Receivable Solutions Limited | Administrative & support | 2014 |
| Recio Ltd | Information & communication | 2024 |
| Recsite Limited | Information & communication | 2009 |
| Red Acer Apartments Ltd | Hospitality | 2022 |
| Red Design & Build Ltd | Construction | 2018 |
| Red Horse RE Limited | Real estate | 2019 |
| Red Onion Kingston Ltd | Hospitality | 2026 |
| Red Planet Pizza Ltd | Hospitality | 2002 |
| Red Sigma Ltd | Hospitality | 2024 |
| Red Top Training Camps Limited | Arts & recreation | 2011 |
| Redam Limited | Extraterritorial | 2017 |
| Redstar Accounting Limited | Real estate | 2017 |
| Reece's Rafts Limited | Administrative & support | 2024 |
| Reenas Kitchen Ltd | Hospitality | 2024 |
| Refurb-A-Sash Limited | Manufacturing | 1996 |
| Regal Business Consultancy Ltd | Professional & scientific | 2014 |
| Regency Gate Management Limited | Extraterritorial | 2015 |
| Regency Western Limited | Real estate | 2018 |
| Regents Services Ltd | Other services | 2023 |
| Rehyoboth Properties Limited | Real estate | 2025 |
| Remus IT Limited | Information & communication | 2013 |
| Remusprocurement Limited | Wholesale & retail | 2018 |
| Rentx Ltd | Wholesale & retail | 2020 |
| REP Consultancy Ltd | Other services | 2017 |
| Repair Gadgets Limited | Wholesale & retail | 2025 |
| Residential Renovation London Ltd | Construction | 2020 |
| Resolute Design and Build Limited | Construction | 2012 |
| Resourze Limited | Administrative & support | 2016 |
| Revel Custom Motorcycles Ltd | Wholesale & retail | 2021 |
| Revive Design & Build Developments Ltd | Construction | 2025 |
| Revive Design & Build Ltd | Construction | 2016 |
| Revolutionary Transformation Solutions Limited | Information & communication | 2015 |
| Rezai Rugs Ltd | Wholesale & retail | 2022 |
| RF General Building Ltd | Construction | 2024 |
| Rhodah Ltd | Extraterritorial | 2023 |
| Rhyh Group Holdings Ltd | Construction | 2026 |
| Riaa Group Limited | Financial services | 2025 |
| Richard Campling Ltd | Information & communication | 2015 |
| Richmond Electrical Projects Limited | Construction | 2018 |
| Richmond Investments (UK) Limited | Real estate | 2012 |
| Richmond Property Ventures Limited | Real estate | 2017 |
| Richmont & Partners Ltd | Professional & scientific | 2014 |
| Rickythunder Ltd | Health & social care | 2023 |