| Resan Ltd | Health & social care | 2024 |
| Researching People Ltd | Professional & scientific | 2018 |
| Resera Investments Ltd | Real estate | 2019 |
| Reset Education Consultant Ltd | Education | 2025 |
| Residia Group Limited | Hospitality | 2025 |
| Residia Limited | Hospitality | 2025 |
| Residify Ltd | Real estate | 2021 |
| Resiprop Construction Ltd | Construction | 2025 |
| Reskin Aesthetic Ltd | Other services | 2025 |
| Resolumed Ltd | Professional & scientific | 2023 |
| Resolute Assets Ltd | Real estate | 2020 |
| Resolute Finance Consulting Ltd | Administrative & support | 2018 |
| Resolute Services London Ltd | Water & waste | 2017 |
| Resolve Care Support Ltd | Health & social care | 2025 |
| Resolve Immigration Consultancy Limited | Professional & scientific | 2006 |
| Resolve Personnel Management Limited | Professional & scientific | 2000 |
| Resource Full Ltd | Administrative & support | 2020 |
| Resourcing Life Science Ltd | Administrative & support | 2012 |
| Responsible Tech Ltd | Information & communication | 2024 |
| Resqueue Ltd | Information & communication | 2024 |
| Restaurix Solutions Ltd | Hospitality | 2025 |
| Resti Sleep Ltd | Wholesale & retail | 2025 |
| Restless Minds Music Ltd | Information & communication | 2020 |
| Restorebot Ltd | Information & communication | 2021 |
| Resus VR Limited | Wholesale & retail | 2019 |
| Retail Food Procurement Limited | Administrative & support | 2018 |
| Retail Food Services Limited | Administrative & support | 2018 |
| Retail Fortune Ltd | Wholesale & retail | 2023 |
| Retail Grocers Limited | Wholesale & retail | 2022 |
| Retail Inc Limited | Wholesale & retail | 2014 |
| Retro Computer Sales Ltd | Information & communication | 2024 |
| Retro Installers Limited | Construction | 2025 |
| Retro Smart Ltd | Construction | 2024 |
| Retro-Pulse Limited | Information & communication | 2024 |
| Retrofit Specialist Ltd | Construction | 2020 |
| Reva Trading Limited | Wholesale & retail | 2025 |
| Revclub Ltd | Information & communication | 2026 |
| Revensdale Ltd | Real estate | 2022 |
| Revenue & Tax Management Accountancy Ltd | Professional & scientific | 2015 |
| Revenue & Tax Management Ltd | Professional & scientific | 2008 |
| Revere Studios Ltd | Professional & scientific | 2020 |
| Reverielondonx Ltd | Wholesale & retail | 2024 |
| Revify Cars Limited | Wholesale & retail | 2025 |
| Revinvest Ltd | Financial services | 2025 |
| Revitalize Massage Ltd | Other services | 2021 |
| Revive & Renovate Ltd | Construction | 2024 |
| Revive Automobiles Ltd | Professional & scientific | 2025 |
| Revoltas Consultants Limited | Construction | 2012 |
| Revolution Traders Private Ltd | Wholesale & retail | 2025 |
| Revolutionary Brands Limited | Manufacturing | 2021 |
| Revolutionlondon Ltd | Hospitality | 2025 |
| Revolux Goods Ltd | Wholesale & retail | 2025 |
| Revspecialist Limited | Hospitality | 2018 |
| Revu Limited | Wholesale & retail | 2025 |
| Rewind Ents Limited | Other services | 2021 |
| Rewire the System Ltd | Other services | 2026 |
| REX Group Ltd | Administrative & support | 2016 |
| Rexha Builders Ltd | Construction | 2018 |
| Rexhmati Properties Limited | Real estate | 2025 |
| Rexmain Limited | Real estate | 1985 |
| Rexon Retail E-Commerce & Wholesale Ltd | Wholesale & retail | 2025 |
| Rexport Consulting Limited | Health & social care | 2015 |
| Rexwell Associates Ltd | Other services | 2007 |
| Rexwholesale Ltd | Wholesale & retail | 2023 |
| Rexwood Furniture Ltd | Wholesale & retail | 2025 |
| Reylux Properties Ltd | Construction | 2023 |
| Reynolds Plumbing Services Ltd | Construction | 2025 |
| Reyson Badger Properties Ltd | Hospitality | 2023 |
| Reywaves Limited | Wholesale & retail | 2025 |
| Rezia Properties Limited | Real estate | 2024 |
| Rezin Honar Ltd | Manufacturing | 2024 |
| RF E13 Traders Limited | Wholesale & retail | 2024 |
| RFA Developments Limited | Construction | 2018 |
| RFA Investments UK Ltd | Real estate | 2023 |
| RFAL85 Ltd | Construction | 2026 |
| RFG Gears Ltd | Wholesale & retail | 2021 |
| RFK Group Ltd | Real estate | 2020 |
| RFS Investments Limited | Real estate | 2016 |
| RG Businesses Ltd | Professional & scientific | 2025 |
| RG Essex Services Ltd | Health & social care | 2019 |
| RG Global Ltd | Wholesale & retail | 2019 |
| RG Realtors Ltd | Real estate | 2026 |
| RG Thermal Ltd | Construction | 2025 |
| RG UK Classic Ltd | Professional & scientific | 2020 |
| RG Woodgate Ltd | Wholesale & retail | 2023 |
| RG World Limited | Construction | 2025 |
| RGA Interiors Ltd | Construction | 2024 |
| RGC Shop Limited | Wholesale & retail | 2026 |
| Rgkp Consulting Limited | Professional & scientific | 2017 |
| RGM Building & Landscaping Ltd | Construction | 2018 |
| RGM Stairs.Co Ltd | Construction | 2020 |
| RGS Consultancy Limited | Professional & scientific | 2022 |
| RH Sports Hospitality Limited | Arts & recreation | 2024 |
| Rhaa Properties Ltd | Real estate | 2016 |
| Rhcube Limited | Real estate | 2024 |
| Rhein UK Ltd | Manufacturing | 2025 |
| Rhema DEE Ltd | Wholesale & retail | 2026 |
| Rhema JUK Ltd | Administrative & support | 2024 |
| Rhema Security Contracts Ltd | Administrative & support | 2021 |
| RHI Properties Ltd | Real estate | 2025 |