| Resident North Limited | Professional & scientific | 2022 |
| Residential and Leisure Parks Limited | Hospitality | 2024 |
| Residential Block Cleaning Ltd | Administrative & support | 2019 |
| Residential Cleaning Facilities Limited | Administrative & support | 2025 |
| Residential Vines Ltd | Real estate | 2022 |
| Residents of Grange Close Ltd | Real estate | 2019 |
| Resilets Ltd | Real estate | 2019 |
| Resilience (the Ukrainian Support Centre) CIC | Education | 2024 |
| Resilience Investments Ltd | Financial services | 2026 |
| Resilience Martial Arts Ltd | Education | 2023 |
| RESIN8 Surfaces Ltd | Construction | 2022 |
| Resisearch Ltd | Administrative & support | 2022 |
| Resitech Limited | Construction | 1992 |
| Resman Limited | Information & communication | 1990 |
| Resolute Legal Costs Limited | Administrative & support | 2024 |
| Resolute Legal Services Ltd | Professional & scientific | 2022 |
| Resolute Precast Ltd | Construction | 2013 |
| Resolute Property Management Group Ltd | Households | 2019 |
| Resolute Ventures Ltd | Professional & scientific | 2022 |
| Resolve Drainage Limited | Water & waste | 2012 |
| Resolve Energy Ltd | Professional & scientific | 2011 |
| Resolve HR Ltd | Administrative & support | 2020 |
| Resolve Point Group Limited | Professional & scientific | 2026 |
| Resona Intelligence Limited | Information & communication | 2026 |
| Resortist Limited | Wholesale & retail | 2022 |
| Resource Management Global Ltd | Administrative & support | 2008 |
| Resource Partnership Limited | Administrative & support | 2009 |
| Resourced Business Ltd | Wholesale & retail | 2025 |
| Resourcery Group Holdings Limited | Financial services | 2020 |
| Resourcery Group Limited | Administrative & support | 2016 |
| Resp Topco Limited | Professional & scientific | 2023 |
| Respiosa Ltd | Manufacturing | 2022 |
| Respite Matters CIC | Public administration | 2025 |
| Respitec Company Limited | Professional & scientific | 1999 |
| Resprayupvc Ltd | Construction | 2021 |
| Rest Assured Property Restoration Ltd | Construction | 2018 |
| Rest Bite Cafe Ltd | Hospitality | 2024 |
| Rest Nest Ltd | Manufacturing | 2013 |
| Restaurant 264 Ltd | Hospitality | 2017 |
| Restaurant 53 Ltd | Hospitality | 2024 |
| Restaurant Projects Ltd | Wholesale & retail | 2019 |
| Restaurant Vetch Ltd | Hospitality | 2023 |
| Restaurante Sergio Limited | Hospitality | 2005 |
| Restick Ltd | Professional & scientific | 2026 |
| Restin Limited | Hospitality | 2025 |
| Restless Minds Ltd | Wholesale & retail | 2026 |
| Reston Global Ltd | Wholesale & retail | 2021 |
| Restoration Creations CIC | Real estate | 2021 |
| Restoration NW Ltd | Construction | 2025 |
| Restorative Practice Training and Consultancy (Rptc) Ltd | Professional & scientific | 2022 |
| Restore Roofing Specialists Ltd | Construction | 2025 |
| Restored Balance Ltd | Education | 2024 |
| Resurrect Group Ltd | Other services | 2019 |
| Resurrection Repairs Ltd | Wholesale & retail | 2026 |
| Ret-Sar Limited | Construction | 2011 |
| Reta Globe UK Ltd | Wholesale & retail | 2023 |
| Retail Car UND Truck Ltd | Wholesale & retail | 2025 |
| Retail Managers Ltd | Wholesale & retail | 2020 |
| Retail Multiples (Walsall) Ltd | Wholesale & retail | 2018 |
| Retail Multiples Ltd | Wholesale & retail | 2018 |
| Retail Seller Ltd | Wholesale & retail | 2025 |
| Retailo Ltd | Wholesale & retail | 2025 |
| Retalio Ltd | Wholesale & retail | 2025 |
| Retech World Ltd | Wholesale & retail | 2025 |
| Retford Commercial Repairs Ltd | Wholesale & retail | 2026 |
| Rethink Sustainable Solutions Ltd | Manufacturing | 2023 |
| Retnasingam Reporting Limited | Health & social care | 2019 |
| Retreat Caravans Limited | Real estate | 2024 |
| Retreat Motors Limited | Wholesale & retail | 2006 |
| Retro Blush Limited | Professional & scientific | 2023 |
| Retro Energy Ltd | Construction | 2023 |
| Retro Holding Ltd | Real estate | 2019 |
| Retro Housing One (Liverpool) Limited | Real estate | 1989 |
| Retro Management Group Ltd | Wholesale & retail | 2022 |
| Retrofit Coordination Group Limited | Professional & scientific | 2021 |
| Retrofit Professional Services Limited | Administrative & support | 2023 |
| Retrofit Surveys Ltd | Professional & scientific | 2025 |
| Retsina Limited | Hospitality | 2003 |
| Reupholstery Rapid Limited | Manufacturing | 2020 |
| REV Haus Classics Limited | Wholesale & retail | 2025 |
| REV XL Limited | Professional & scientific | 2025 |
| Reva Clothing Ltd | Wholesale & retail | 2025 |
| Reva Engineering Limited | Professional & scientific | 2004 |
| Revae Wellness Ltd | Manufacturing | 2025 |
| Revdun INT Limited | Construction | 2017 |
| Reveal Consult Limited | Professional & scientific | 2025 |
| Revehaus Media Ltd | Professional & scientific | 2025 |
| Revel Media Limited | Information & communication | 2016 |
| Revenue Growth Agency Ltd | Professional & scientific | 2022 |
| Reverie Label Ltd | Wholesale & retail | 2025 |
| Reverse Games Ltd | Information & communication | 2026 |
| Reverse Ltd | Wholesale & retail | 2022 |
| Review Your Life Ltd | Other services | 2018 |
| Revilo Albion Ltd | Real estate | 2023 |
| Revilo Havelock Ltd | Real estate | 2019 |
| Revilo Properties SRM Ltd | Real estate | 2018 |
| Revilo Property Investments Ltd. | Real estate | 2017 |
| Revilo Property Ltd | Real estate | 2025 |
| Revision Development UK Ltd | Real estate | 2026 |
| Revitedrinks Limited | Wholesale & retail | 2024 |