| Regzen Ltd | Wholesale & retail | 2026 |
| Reid Boats Ltd | Transport & logistics | 2020 |
| Reid York Limited | Other services | 2002 |
| Rejuveny Ltd | Wholesale & retail | 2024 |
| Rekindleapp Ltd | Information & communication | 2026 |
| Related Transactions Ltd | Professional & scientific | 2022 |
| Relationship and Family Therapy (Raft) Ltd | Health & social care | 2007 |
| Relevention Limited | Administrative & support | 2007 |
| Reliable Scaffolding Limited | Construction | 2020 |
| Reliance Asbestos Services Ltd | Administrative & support | 2025 |
| Reliance Racking Ltd | Construction | 2022 |
| Rellz Brickwork Ltd | Construction | 2023 |
| Reload Gaming Limited | Wholesale & retail | 2026 |
| Relsters Limited | Wholesale & retail | 2016 |
| Relutrans Limited | Transport & logistics | 2019 |
| REM Hello World Limited | Information & communication | 2011 |
| Remak Ltd | Wholesale & retail | 2024 |
| Remarkable (Grangemouth) Ltd | Construction | 2023 |
| Remarkable (Leigh-On-Sea) Ltd | Construction | 2022 |
| Remarkable (Surrey) Ltd | Real estate | 2022 |
| Remarkable (Todber) Ltd | Construction | 2023 |
| Remarkable Land Partners Ltd | Construction | 2020 |
| Remarkable PMS Ltd | Construction | 2014 |
| Remconex Ltd | Information & communication | 2023 |
| Remedi Technologies Ltd | Information & communication | 2024 |
| Remflow Limited | Information & communication | 2013 |
| Remm Group Limited | Hospitality | 2022 |
| Remote Technologies Limited | Information & communication | 2001 |
| Removalsgogo Ltd | Transport & logistics | 2026 |
| REN Collective Limited | Manufacturing | 2026 |
| REN Property Ltd | Construction | 2019 |
| Reneweco Installations Limited | Construction | 2024 |
| Reneweco Solutions Limited | Construction | 2015 |
| Renotix Ltd | Construction | 2025 |
| Renova Cafe Ltd | Hospitality | 2025 |
| Renova Services Ltd | Construction | 2025 |
| Renovatio Bikes Limited | Wholesale & retail | 2017 |
| Renovatio Bikes Sales Ltd | Wholesale & retail | 2019 |
| Renovia Limited | Real estate | 2026 |
| Renovix Limited | Construction | 2025 |
| Renovo Consulting Ltd | Administrative & support | 2016 |
| Renowned Solutions Ltd | Manufacturing | 2023 |
| Renshaw Derrick & Company Limited | Professional & scientific | 2023 |
| Renta Accommodaton Management Ltd | Real estate | 2025 |
| Rentals for YOU Ltd | Households | 2025 |
| Rentappeals.Co.Uk Ltd | Wholesale & retail | 2025 |
| Reobote UK Ltd | Administrative & support | 2026 |
| Repair and Maintain Limited | Other services | 2022 |
| Repairs and Maintenance of Motor Vehicles Limited | Wholesale & retail | 2025 |
| Repaper Associates & UK Company Limited | Wholesale & retail | 2024 |
| Repertory Theatrical Productions Limited | Professional & scientific | 1951 |
| Reprog Ltd | Wholesale & retail | 2024 |
| Reptiles Plus Limited | Wholesale & retail | 2001 |
| Requiq Ltd | Administrative & support | 2025 |
| RES Opus Ltd | Real estate | 2023 |
| Reschool Group CIC | Other services | 2025 |
| Reset Tutoring and Mentoring Ltd | Education | 2025 |
| Resew Limited | Other services | 2015 |
| Residential Alarms and Safety UK Ltd | Administrative & support | 2016 |
| Residential Electronics and Telecommunications Ltd | Wholesale & retail | 2016 |
| Residents Management (NO.10) Limited | Real estate | 1985 |
| Residents Management (West Cliff) Limited | Households | 1985 |
| Resilience Professionals Limited | Professional & scientific | 2021 |
| Resin Fitting Ltd | Construction | 2025 |
| Resinate UK Home Improvement Ltd | Construction | 2024 |
| RESN8 Limited | Arts & recreation | 2014 |
| Resneaked Ltd | Wholesale & retail | 2022 |
| Resolutio Consulting Ltd | Administrative & support | 2025 |
| Resolve Estate Management Limited | Real estate | 2026 |
| Respina Ltd | Wholesale & retail | 2020 |
| Respondez Services Limited | Administrative & support | 2017 |
| Respondy Ltd | Information & communication | 2024 |
| Rest Assure Ltd | Construction | 2026 |
| Restaurant Roots Limited | Hospitality | 2015 |
| Restmore Gardens (Laburnum House) Limited | Households | 1961 |
| Restmore Gardens (Magnolia House) Limited | Households | 1959 |
| Restmore Gardens (Wistaria House) Limited | Households | 1960 |
| Restore Heating Ltd | Construction | 2024 |
| Restynge House Management Limited | Households | 2004 |
| Retail & Media Ltd | Other services | 2019 |
| Retreat Rooms (Bournemouth) Ltd | Health & social care | 2025 |
| Retrovibes Vault Ltd | Wholesale & retail | 2026 |
| Retter Mortgage Solutions Ltd | Financial services | 2022 |
| Returns Services Limited | Administrative & support | 2009 |
| Revamp Electric Motor Repairs Limited | Manufacturing | 2020 |
| Reventec Limited | Professional & scientific | 2013 |
| Revenue IO Limited | Professional & scientific | 2025 |
| Revival Canford Cliffs Ltd | Wholesale & retail | 2026 |
| Revival Health and Wellness Limited | Wholesale & retail | 2024 |
| Revival Plastering & Interiors Ltd | Construction | 2017 |
| Revive & Manage Homes Ltd | Construction | 2024 |
| Revive & Rent Limited | Real estate | 2024 |
| Revive Bournemouth Ltd | Other services | 2023 |
| Revive Construction Limited | Construction | 2023 |
| Revive Holdings Ltd | Hospitality | 2018 |
| Revo Property Services Ltd | Construction | 2024 |
| Revoak Ltd | Administrative & support | 2016 |
| Revolution Fast Foods Limited | Hospitality | 2019 |
| Revolutions Records Limited | Wholesale & retail | 2018 |
| Reward Services & Technologies Ltd | Information & communication | 2014 |