| Ravine Court Developments Limited | Real estate | 2002 |
| Rawmarsh News Ltd | Wholesale & retail | 2023 |
| Rawmarsh Stores Ltd | Wholesale & retail | 2023 |
| RAY & Sons Limited | Real estate | 1999 |
| RAY African Limited | Wholesale & retail | 2025 |
| Raycoast Limited | Professional & scientific | 1983 |
| Rayda Services Ltd | Professional & scientific | 2023 |
| Raykasoft Ltd | Wholesale & retail | 2025 |
| Razaq & Iqbal Limited | Wholesale & retail | 1996 |
| RBB Morton Ltd | Hospitality | 2026 |
| RBK Investment Group Ltd | Real estate | 2019 |
| RC Group Ltd | Manufacturing | 2024 |
| RC Skincare Ltd | Other services | 2021 |
| RCD Office Solutions Limited | Administrative & support | 2024 |
| RD Civils Limited | Construction | 2025 |
| Rdjkl Properties Limited | Real estate | 2021 |
| Re:Gen Academy Limited | Education | 2022 |
| Re:Gen Green Limited | Construction | 2023 |
| Re:Gen Group Ltd | Construction | 2023 |
| Re:Gen Midlands Limited | Construction | 2025 |
| Re:Gen North East Limited | Construction | 2014 |
| Re:Gen North West Limited | Construction | 2023 |
| Re:Gen Solutions Limited | Construction | 2023 |
| Re:Gen Yorkshire and East Midlands Limited | Construction | 2024 |
| Ready... Go! (Sports) Ltd | Education | 2020 |
| Real Kall Print & Distribution Ltd | | 2009 |
| Real Lion Freight Ltd | Transport & logistics | 2025 |
| Real Wakanada FC | Arts & recreation | 2025 |
| Rebar King Ltd | Extraterritorial | 2012 |
| Rebecca Calvert Legal Services Ltd | Professional & scientific | 2019 |
| Rebecca Holt Travel Limited | Administrative & support | 2023 |
| Rebecca Maymie Aesthetics Ltd | Other services | 2025 |
| Rebecca Owens Marketing Limited | Professional & scientific | 2018 |
| Rebecca Riley Wellness Ltd | Arts & recreation | 2022 |
| Rebekah Mcginley Artist Ltd | Arts & recreation | 2025 |
| Rebmar Access Ltd | Construction | 2025 |
| Rebuild Home Ltd | Real estate | 2025 |
| Rebuyer Limited | Water & waste | 2021 |
| Recruitment Precision Ltd | Administrative & support | 2023 |
| Red BUS Property Limited | Real estate | 2016 |
| Red Chevron Legal Services Limited | Professional & scientific | 2012 |
| Red Gold and Green Investments Ltd | Professional & scientific | 2021 |
| Red Graphix Ltd | Manufacturing | 2019 |
| Red Managerial Solutions Ltd | Construction | 2024 |
| Red Property North East Limited | Real estate | 2020 |
| Red Sea Advisors Ltd | Professional & scientific | 2025 |
| Redacted Cosmetics Limited | Manufacturing | 2025 |
| Redemption Promotions Limited | Administrative & support | 2018 |
| Redezeus Limited | Construction | 1981 |
| Redfish Property Consultants Ltd | Real estate | 2017 |
| Redfox Marine Services Ltd | Administrative & support | 2013 |
| Redhouse CA Social Club C.I.C. | Hospitality | 2018 |
| Redhouse Consultants NE Ltd | Other services | 2025 |
| Redtec Engineering Ltd | Professional & scientific | 2021 |
| Reed Project Services Ltd | Information & communication | 2026 |
| Reed Stays Ltd | Real estate | 2023 |
| Reel Tax Ltd | Other services | 2025 |
| Reevaoffshore Ltd | Construction | 2023 |
| Reflections NE Ltd | Other services | 2026 |
| Reframe Wellness Club Limited | Arts & recreation | 2025 |
| Refugee Art and Heritage Group C.I.C. | Health & social care | 2025 |
| Regain Group Ltd | Information & communication | 2025 |
| Regale Tavern Ltd | Hospitality | 2026 |
| Regan Care Ltd | Health & social care | 2025 |
| Regenesis Therapies Limited | Professional & scientific | 2020 |
| Reign Hair Limited | Other services | 2024 |
| Reina Styles Limited | Manufacturing | 2025 |
| Reinvented With Friends CIC | Education | 2022 |
| Relax Inn Newcastle Ltd | Hospitality | 2024 |
| Rememberme QR Ltd | Manufacturing | 2026 |
| Remote Focus Limited | Information & communication | 2025 |
| Remote Rapid Relief Ltd | Hospitality | 2026 |
| Renaissance Sales and Distribution Limited | Professional & scientific | 1981 |
| Renascence Limited | Information & communication | 2024 |
| Renlux Ltd | Construction | 2025 |
| Rennison Ltd | Hospitality | 2015 |
| Renoconstruct NE Limited | Construction | 2026 |
| Renwick Property Limited | Households | 2025 |
| Rescue Access Safety Ltd | Professional & scientific | 2018 |
| Reset Reload Limited | Administrative & support | 2024 |
| Resin Flooring North East Ltd | Administrative & support | 2018 |
| Resinn Ltd | Wholesale & retail | 2022 |
| Rest Solutions Ltd | Information & communication | 2022 |
| Restore Haircare UK Ltd | Wholesale & retail | 2026 |
| Restyle Renovations Property Services NE Ltd | Construction | 2025 |
| Retro Sure Services Ltd | Construction | 2025 |
| Retro Ultras Ltd | Wholesale & retail | 2025 |
| Retroflow Group Ltd | Construction | 2025 |
| Retronol Ltd | Construction | 2019 |
| Reverso Italia Ltd | Professional & scientific | 2023 |
| Revert Holdings Ltd | Financial services | 2025 |
| Revinson Fire Limited | Construction | 2018 |
| Revive & Survive CIC | Education | 2026 |
| Revive Consultancy Limited | Professional & scientific | 2012 |
| Revlot Developments Ltd | Real estate | 2025 |
| Revolution Tint Limited | Wholesale & retail | 2019 |
| Revsop Fire Consultants Ltd | Public administration | 2025 |
| REX Venit Healthcare Solutions Ltd | Health & social care | 2019 |
| REZ Construction Limited | Construction | 2021 |
| REZ Hair Salon Limited | Other services | 2013 |