| Ravello HR Ltd | Administrative & support | 2023 |
| Raven Invest Limited | Financial services | 2025 |
| Raven's Ocean Ltd | Education | 2020 |
| Ravens Community Gaming Ltd | Information & communication | 2024 |
| Ravensleigh Ltd | Construction | 2017 |
| Ravishon Ltd | Wholesale & retail | 2024 |
| Ravon Property Ltd | Real estate | 2026 |
| Rawa Jewels Ltd | Wholesale & retail | 2023 |
| RAY Ltd | Wholesale & retail | 2025 |
| Raza Wholesale IS Best Shop Ltd | Wholesale & retail | 2025 |
| Razup International Limited | Administrative & support | 2025 |
| Rbplaces Ltd | Real estate | 2024 |
| RCB London Ltd | Wholesale & retail | 2022 |
| RD Maintenance Services Ltd | Other services | 2026 |
| RDC IT Solutions Limited | Professional & scientific | 2005 |
| Rdic Go Trading Limited | Wholesale & retail | 2025 |
| Rdrama Ltd | Information & communication | 2025 |
| RDS Knowledge Ltd | Information & communication | 2015 |
| RDS Sync Ltd | Information & communication | 2019 |
| Reach Higher Sports Management Ltd | Arts & recreation | 2022 |
| Read Investment Holdings Limited | Real estate | 2024 |
| Ready Steady EAT Ltd | Extraterritorial | 2018 |
| Ready Steady Neddies Ltd | Extraterritorial | 2024 |
| Ready UP Sports Ltd | Information & communication | 2025 |
| Readyinone Limited | Information & communication | 2021 |
| Real Estate Horizons Ltd | Professional & scientific | 2010 |
| Real IT Solutions UK Limited | Information & communication | 2020 |
| Real Language Solutions Limited | Professional & scientific | 2026 |
| Real Music Publishing Limited | Information & communication | 2001 |
| Realcarbon Consulting Ltd | Construction | 2021 |
| Realfast Ltd | Wholesale & retail | 2025 |
| Realisemotion Anywhere Ltd | Administrative & support | 2025 |
| Realmss Ltd | Professional & scientific | 2025 |
| Reay Limited | Real estate | 1997 |
| Rebbas Ltd | Wholesale & retail | 2025 |
| Rebel CRM Ltd | Information & communication | 2026 |
| Rebel ROI Ltd | Professional & scientific | 2025 |
| Reblum Ltd | Information & communication | 2023 |
| Reborn Studio Ltd | Wholesale & retail | 2025 |
| Rec-Africa Ltd | Wholesale & retail | 2025 |
| Receiptit Ltd | Information & communication | 2026 |
| Reclaim Centre Ltd | Wholesale & retail | 2021 |
| Recoo Ltd | Extraterritorial | 2025 |
| Recruiting Minds Limited | Professional & scientific | 2022 |
| Recruso Finance Ltd | Professional & scientific | 2015 |
| Red Apple Holdings Ltd | Financial services | 2026 |
| Red Bean Verse Limited | Wholesale & retail | 2025 |
| Red Cat Recruitment Limited | Administrative & support | 2025 |
| Red Delta Security Ltd | Financial services | 2021 |
| Red Dragon Homes Limited | Real estate | 2021 |
| Red Dragons Martial Arts Ltd | Arts & recreation | 2022 |
| Red Green Blue Ltd | Professional & scientific | 2021 |
| Red Lion Close RTM Co Ltd | Real estate | 2013 |
| Red Lion Media Group Limited | Wholesale & retail | 2025 |
| Red Mountain Marketing Limited | Professional & scientific | 2023 |
| Red October Web Ltd | Information & communication | 2019 |
| Red Sea Trading and Travel Ltd | Wholesale & retail | 2025 |
| Redacre Ltd | Real estate | 2018 |
| Redawn Limited | Information & communication | 2024 |
| Redbreast Trading Limited | Wholesale & retail | 2025 |
| Redbrixsent Limited | Wholesale & retail | 2021 |
| REDDY2REVELL Ltd | Real estate | 2021 |
| Redefining Fitness Ltd | Education | 2020 |
| Redfin Property Investment Ltd | Real estate | 2025 |
| Redfox Security Ltd | Financial services | 2023 |
| Redmond Roxpsy Ltd | Wholesale & retail | 2025 |
| Redmoonicr Ltd | Wholesale & retail | 2025 |
| Redprim Ltd | Professional & scientific | 2024 |
| Redstone Property Investments Ltd | Real estate | 2024 |
| Redteaming Ltd | Education | 2025 |
| Redwerk Development Ltd | Wholesale & retail | 2020 |
| Redwood Accounts Limited | Professional & scientific | 2020 |
| Reel Angels Ltd | Administrative & support | 2010 |
| Reelmind AI Ltd | Information & communication | 2025 |
| Reeltalk Films Limited | Arts & recreation | 2025 |
| Reenix Ltd | Extraterritorial | 2024 |
| Reet Management Ltd | Professional & scientific | 2025 |
| Refine Longevity Ltd | Health & social care | 2025 |
| Refined Mart Ltd | Wholesale & retail | 2026 |
| Refit Ultra White Ltd | Wholesale & retail | 2025 |
| Reform and Rise C.I.C. | Public administration | 2025 |
| Reform Payroll Limited | Professional & scientific | 2024 |
| Refresh Cleaning Ltd | Administrative & support | 2016 |
| Regal PUB Group Limited | Real estate | 2026 |
| Regal Radiance Group Ltd | Manufacturing | 2025 |
| Regal Tech Trade Ltd | Wholesale & retail | 2025 |
| Regalrucksack Ltd | Wholesale & retail | 2025 |
| Regent Garments Fashion Limited | Wholesale & retail | 2026 |
| Regional Accounting Services Limited | Professional & scientific | 2020 |
| Regional Association of Art Education in Asia | Public administration | 2022 |
| Regus Mercantile Ltd | Wholesale & retail | 2025 |
| Rehan Global Ltd | Wholesale & retail | 2025 |
| Reicontech Ltd | Information & communication | 2012 |
| Reik Ltd | Information & communication | 2022 |
| Reinbok Limited | Information & communication | 2018 |
| Reinmoor Ltd | Administrative & support | 2026 |
| Rekode Ltd | Professional & scientific | 2022 |
| Relancer Tech Ltd | Wholesale & retail | 2024 |
| Relational Roots Ltd | Health & social care | 2021 |
| Reliable Technology Limited | Wholesale & retail | 2026 |