| Red Goat Food Ltd | Hospitality | 2021 |
| Red Green Ltd | Extraterritorial | 2019 |
| Red Light Events Limited | Hospitality | 2026 |
| Red Lions Judo CIC | Education | 2022 |
| Red Oaks Investments Limited | Financial services | 2025 |
| Red Services NE Ltd | Construction | 2022 |
| Red Sparrow Properties Ltd | Real estate | 2015 |
| Red Tattles Limited | Information & communication | 2009 |
| Redarmy Group Limited | Information & communication | 2015 |
| Redcar & Eston School Sport Partnership CIC | Education | 2020 |
| Redcar Auto & Performance Centre Limited | Wholesale & retail | 2014 |
| Redcar Barbers Ltd | Other services | 2022 |
| Redcar Borough Bears Limited | Arts & recreation | 2005 |
| Redcar Bubbles Ltd | Wholesale & retail | 2026 |
| Redcar Car Wash Ltd | Other services | 2022 |
| Redcar Minimart Limited | Hospitality | 2018 |
| Redclif Care Ltd | Health & social care | 2021 |
| Redd Group Ltd | Extraterritorial | 2022 |
| Redd Ltd | Extraterritorial | 2023 |
| Redd Services Ltd | Extraterritorial | 2021 |
| Redd Steel Ltd | Extraterritorial | 2022 |
| Reddbridge Ltd | Extraterritorial | 2022 |
| Reddfix Ltd | Extraterritorial | 2021 |
| Reddgate Ltd | Extraterritorial | 2022 |
| Reddz ARK Hairdressing Limited | Other services | 2011 |
| Rede House Business Space Ltd | Real estate | 2025 |
| Redefined Futures Talent Consultancy Ltd | Professional & scientific | 2025 |
| Redfox Site Services Ltd | Professional & scientific | 2023 |
| Redline Compliance Ltd | Administrative & support | 2024 |
| Redworth Group Limited | Wholesale & retail | 2017 |
| Reece Michael Limited | Manufacturing | 2025 |
| Reecehb Ltd | Transport & logistics | 2026 |
| Reed Property Group Ltd | Real estate | 2017 |
| Reef Project Services Limited | Construction | 2022 |
| Reel to Real Property Management Ltd | Real estate | 2025 |
| Reem Supplements Ltd | Wholesale & retail | 2025 |
| Refill Weigh Save Ltd | Wholesale & retail | 2020 |
| Reformatex Ltd | Construction | 2025 |
| Refresh Property Renovations Ltd | Construction | 2022 |
| Refurb Haus Ltd | Wholesale & retail | 2025 |
| Regalcell Limited | Professional & scientific | 1996 |
| Regency Pizza Wingate Ltd | Hospitality | 2019 |
| Regent Leisure Limited | Hospitality | 2006 |
| Regent Quarter Social Ltd | Hospitality | 2018 |
| Rehan Haider Shah Ltd | Wholesale & retail | 2025 |
| Rehman Food Store NE Ltd | Wholesale & retail | 2026 |
| Reilly CMS Limited | Administrative & support | 2021 |
| Reinfinite Group Ltd | Professional & scientific | 2024 |
| Reinfinite Holdings Ltd | Real estate | 2023 |
| Reinfinite Investment Ltd | Financial services | 2024 |
| Reinfinite Ltd | Construction | 2023 |
| Reivaux Leisure Limited | Hospitality | 2020 |
| Relicloom Trading Ltd | Wholesale & retail | 2025 |
| Remeess London Ltd | Manufacturing | 2019 |
| Render Alarms Holdings Limited | Administrative & support | 2026 |
| Render Alarms Limited | Administrative & support | 1989 |
| Rendevous Pizzeria Ltd | Hospitality | 2019 |
| Renewable Asset Protection Limited | Professional & scientific | 2021 |
| Renewable Energy Ecmic Ltd | Professional & scientific | 2026 |
| Renewable Future North Ltd | Construction | 2023 |
| Renewable Repair + Inspection Limited | Construction | 2022 |
| Renewable Resources NE Ltd | Construction | 2024 |
| Renewable Safety Services Limited | Public administration | 2013 |
| Renitech Limited | Information & communication | 2016 |
| Renoject Developments Limited | Real estate | 2025 |
| Renoject Group Limited | Financial services | 2023 |
| Renoject Lettings Limited | Real estate | 2023 |
| Renoject Limited | Construction | 2022 |
| Renoject Properties Limited | Real estate | 2023 |
| Renoject Sourcing Limited | Real estate | 2023 |
| Renoject SPV Limited | Construction | 2025 |
| Renovation Properties Limited | Real estate | 2020 |
| Renovess Ltd | Construction | 2019 |
| Renovess Technical Services Ltd | Construction | 2024 |
| Rent a House (NE) Limited | Real estate | 2017 |
| Rent Buy Sell Ltd | Other services | 2017 |
| Renz Property Sourcing Limited | Real estate | 2026 |
| Renzo Rental’S Ltd | Administrative & support | 2025 |
| Renzorentals (NE) Ltd | Administrative & support | 2025 |
| REO Burgess Ltd | Professional & scientific | 2026 |
| REO6 Ltd | Wholesale & retail | 2022 |
| Repair Pilot Ltd | Information & communication | 2019 |
| Repairs NE Ltd | Construction | 2025 |
| Repono Holdco 1 Limited | Financial services | 2015 |
| Rerooted Group Ltd | Professional & scientific | 2026 |
| Reserve Financial Services Ltd | Information & communication | 2025 |
| Resideme Ltd | Real estate | 2024 |
| Residencia Ltd | Households | 2018 |
| Resilient Mothers of Grenada CIC | Education | 2025 |
| Resolute Care System Ltd | Health & social care | 2024 |
| Resolute Energy Solutions NE Ltd | Construction | 2024 |
| Resolute Property System Ltd | Households | 2024 |
| Resolute Service System Ltd | Wholesale & retail | 2024 |
| Resolution Media and Publishing Limited | Information & communication | 2017 |
| Resonance Health Foundation CIC | Information & communication | 2025 |
| Resonance Health Ltd | Information & communication | 2025 |
| Respark App Ltd | Information & communication | 2024 |
| Restore Masonry Restoration Ltd | Construction | 2013 |
| Restore Tech Ltd | Wholesale & retail | 2024 |
| Retaining Holdings Limited | Construction | 2021 |