| Redearth Village Schools Uganda Limited | Education | 2009 |
| Redee's Ltd | Construction | 2022 |
| Redemptive Technology Ltd | Information & communication | 2025 |
| Redston ELT Services Limited | Arts & recreation | 2010 |
| Reedhurst Limited | Real estate | 2011 |
| Reefwood Limited | Real estate | 1989 |
| Reel and Thread Productions Ltd | Information & communication | 2025 |
| Reel Life Monsters CIC | Information & communication | 2024 |
| Reel Soul Movies Ltd | Information & communication | 2012 |
| Reenvisaged Ltd | Professional & scientific | 2021 |
| Reesets Limited | Professional & scientific | 2022 |
| Reeves Heating Limited | Construction | 2003 |
| Reform Training and Skills Limited | Education | 2013 |
| Reframe Design Studio Ltd | Construction | 2018 |
| Regain Case Management Limited | Professional & scientific | 2013 |
| Regal Developments Ltd | Construction | 2025 |
| Regency Garage Limited | Wholesale & retail | 2012 |
| Regency Red Limited | Real estate | 2007 |
| Regenerate Construction Consulting Ltd | Professional & scientific | 2025 |
| Regenesis Financial Limited | Professional & scientific | 2024 |
| Regenesis Group Limited | Financial services | 2025 |
| Regenesis Property Ltd | Real estate | 2023 |
| Regenesis Property Sourcing Limited | Real estate | 2022 |
| Regenesis UK Limited | Wholesale & retail | 2009 |
| Regentlease Limited | Real estate | 2000 |
| Reghistory Ltd | Information & communication | 2026 |
| Regina Management Limited | Households | 1986 |
| Regrowth Ltd | Professional & scientific | 2025 |
| Regulatory Support Services Limited | Professional & scientific | 2015 |
| Reid Wines (1992) Limited | Wholesale & retail | 1992 |
| REJUVEN8 Food Ltd | Wholesale & retail | 2026 |
| Rejuvenate Fitness Bath Ltd | Arts & recreation | 2022 |
| Rejuvenescence Laser Clinic Limited | Other services | 2010 |
| RELA8 Group Limited | Administrative & support | 2024 |
| Relational Wellbeing Collaborative Ltd | Professional & scientific | 2020 |
| Relationship and Family Counselling Services Ltd | Health & social care | 2025 |
| Release Dynamics Limited | Information & communication | 2003 |
| Relish Retreats Ltd | Real estate | 2021 |
| Relish Sports Distribution Ltd | Manufacturing | 2013 |
| Relish the Great Outdoors Ltd | Arts & recreation | 2011 |
| Remind UK Charity | Health & social care | 1994 |
| REN Living Ltd | Real estate | 2019 |
| Renato Ferrari Limited | Information & communication | 1998 |
| Renew Aesthetics and Wellbeing Ltd | Health & social care | 2025 |
| Renewable Force Ltd | Construction | 2014 |
| Renewal Associates Limited | Administrative & support | 2010 |
| Renewal Holdings Group Ltd | Financial services | 2026 |
| Renewal International Ltd | Professional & scientific | 2025 |
| Rengen (Burnham Road) Limited | Construction | 2014 |
| Rengen (Paintworks) Limited | Construction | 2018 |
| Rengen (Radway) Limited | Construction | 2017 |
| Rengen (Scala) Limited | Real estate | 2019 |
| Rengen Ambra Vale Limited | Real estate | 2021 |
| Rengen Andalusia Lettings Limited | Real estate | 2024 |
| Rengen Andalusia Limited | Real estate | 2022 |
| Rengen Armourers Lettings Limited | Real estate | 2025 |
| Rengen Berkeley Limited | Real estate | 2025 |
| Rengen Bladud Limited | Real estate | 2021 |
| Rengen Clarence Limited | Real estate | 2022 |
| Rengen College Green Lettings Limited | Real estate | 2022 |
| Rengen College Green Limited | Real estate | 2020 |
| Rengen Colthurst Lettings Limited | Real estate | 2023 |
| Rengen Crown Limited | Real estate | 2022 |
| Rengen Developments Limited | Construction | 2015 |
| Rengen Exeter Lettings Limited | Real estate | 2024 |
| Rengen Foundry Lettings Limited | Real estate | 2023 |
| Rengen Frome Lettings Limited | Real estate | 2024 |
| Rengen Group Limited | Financial services | 2026 |
| Rengen Hanover Lettings Limited | Real estate | 2024 |
| Rengen Harding Lettings Limited | Real estate | 2022 |
| Rengen Henry Street Lettings Limited | Real estate | 2022 |
| Rengen Henry Street Limited | Real estate | 2021 |
| Rengen HOF Lettings Limited | Real estate | 2024 |
| Rengen House Limited | Real estate | 2013 |
| Rengen Limmer Cave Limited | Real estate | 2023 |
| Rengen Limmer Cumberland Limited | Real estate | 2024 |
| Rengen Limmer Exeter Limited | Real estate | 2023 |
| Rengen Limmer Limited | Real estate | 2023 |
| Rengen Limmer SCP Limited | Real estate | 2023 |
| Rengen Limmer Small Limited | Real estate | 2024 |
| Rengen Longacre Lettings Limited | Real estate | 2022 |
| Rengen Longacre Limited | Construction | 2020 |
| Rengen Maggs Limited | Real estate | 2026 |
| Rengen Mews Lettings Limited | Real estate | 2023 |
| Rengen Mews Management Limited | Real estate | 2023 |
| Rengen Minerva Limited | Real estate | 2022 |
| Rengen Nautica Limited | Real estate | 2021 |
| Rengen NBH Lettings Limited | Real estate | 2022 |
| Rengen NBH Limited | Real estate | 2021 |
| Rengen Paintworks Harding Limited | Real estate | 2023 |
| Rengen Paintworks Holdings Limited | Real estate | 2023 |
| Rengen Paintworks Riverside Limited | Real estate | 2020 |
| Rengen Park Street Limited | Real estate | 2019 |
| Rengen Sedley Limited | Real estate | 2025 |
| Rengen Skyline Lettings Limited | Real estate | 2025 |
| Rengen the Foundry Limited | Real estate | 2018 |
| Rengen Weirside Limited | Real estate | 2025 |
| Rengen Wellsway Limited | Real estate | 2024 |
| Rengen Wyndham Limited | Real estate | 2025 |
| Renovare Properties Limited | Real estate | 2020 |