| Rendesco Limited | Professional & scientific | 2012 |
| Rendesco LMH Shareholder Limited | Administrative & support | 2021 |
| Renertec Ltd | Construction | 2014 |
| Reneural Confidence Consultancy Limited | Professional & scientific | 2019 |
| Renewable Heat Assets 1 Limited | Other services | 2013 |
| Renewable Heat Assets 10 Limited | Other services | 2017 |
| Renewable Heat Assets 2 Limited | Other services | 2015 |
| Renewable Heat Assets 3 Limited | Other services | 2015 |
| Renewable Heat Assets 4 Limited | Other services | 2016 |
| Renewable Heat Assets 5 Limited | Other services | 2017 |
| Renewable Heat Assets 6 Limited | Other services | 2017 |
| Renewable Heat Assets 7 Limited | Other services | 2017 |
| Renewable Heat Assets 8 Limited | Other services | 2017 |
| Renewable Heat Assets 9 Limited | Other services | 2017 |
| Renewable Heat Holdings Limited | Financial services | 2018 |
| Reno Construction and Landscaping Ltd | Extraterritorial | 2026 |
| Reno Records Ltd | Manufacturing | 2022 |
| Renovate 76 Ltd | Construction | 2022 |
| Renovation Group Services Ltd | Construction | 2021 |
| REP Code Eleven Limited | Information & communication | 2016 |
| REP Fitness UK Ltd | Wholesale & retail | 2025 |
| Repguard Security Ltd | Information & communication | 2025 |
| Replay Entertainment Limited | Wholesale & retail | 2011 |
| Reputation.Com (UK) Limited | Professional & scientific | 2011 |
| Research Performance Machining Ltd | Manufacturing | 2025 |
| Reset Gym Ltd | Arts & recreation | 2023 |
| Residence 8 Limited | Construction | 2017 |
| Resilient Changing Ltd | Information & communication | 2020 |
| Resipco Limited | Administrative & support | 2021 |
| Resolution Data Management Limited | Information & communication | 1985 |
| Resonova Coaching Limited | Professional & scientific | 2026 |
| Respects App Limited | Professional & scientific | 2011 |
| Restart Software Ltd | Information & communication | 2021 |
| Restaurant Venezia Ltd | Hospitality | 2025 |
| Restoration Lane Ltd | Real estate | 2020 |
| Restoration Staycations Ltd | Real estate | 2021 |
| Restore Emergency at CGH Limited | Administrative & support | 2019 |
| Resumekicks UK Ltd | Wholesale & retail | 2022 |
| Retail Geek Ltd | Information & communication | 2025 |
| Retailal Ltd | Wholesale & retail | 2024 |
| Retain Healthcare Ltd | Administrative & support | 2018 |
| Retain Holdings Ltd | Health & social care | 2021 |
| Retain Homecare Ltd | Health & social care | 2020 |
| Retain Skills (South West) Limited | Education | 2006 |
| Retlas Cyber Limited | Information & communication | 2020 |
| Retreat Limited(The) | Hospitality | 1982 |
| Retrospect Group Ltd | Construction | 2021 |
| Retrospective Events Ltd | Arts & recreation | 2020 |
| Returnjet Limited | Transport & logistics | 2012 |
| Reuleaux Asset Management Limited | Administrative & support | 2015 |
| REV Corp Ltd | Wholesale & retail | 2019 |
| Revamp Clothing Agency Cheltenham Limited | Wholesale & retail | 2011 |
| Revelation of Solutions Limited | Administrative & support | 2018 |
| Revise Construction Group Ltd | Construction | 2023 |
| Revision World Networks Limited | Information & communication | 1999 |
| Revitalise Skin Aesthetics Ltd | Other services | 2018 |
| Revitalize Property Development Ltd | Real estate | 2011 |
| Revive Agronomy Ltd | Administrative & support | 2017 |
| Revolution Plumbing Ltd | Construction | 2025 |
| Rewardsco International Limited | Professional & scientific | 2008 |
| Reyam Holdings Limited | Extraterritorial | 2015 |
| Reyam Ltd | Manufacturing | 2011 |
| Reynard High Voltage Solutions Ltd | Construction | 2024 |
| Reynolds & Greenwood Limited | Agriculture & fishing | 2007 |
| Reynolds Wharf Residents Association Limited | Households | 2002 |
| Rezolva Limited | Administrative & support | 2025 |
| RFC (UK) Limited | Wholesale & retail | 1994 |
| RG (Wicklands) Limited | Construction | 2004 |
| RG Portland Health Limited | Health & social care | 2014 |
| Rgb:Av Ltd | Professional & scientific | 2010 |
| RGS Property Ltd | Real estate | 2024 |
| Rgsa Trading Limited | Administrative & support | 2026 |
| RGT Technologies Limited | Professional & scientific | 2024 |
| RGV Aviation Limited | Manufacturing | 1986 |
| RH Central Park NO.1 Limited | Real estate | 2022 |
| RH Central Park NO.2 Limited | Real estate | 2022 |
| RH Eastern NO.1 Limited | Real estate | 2024 |
| RH Electrical Contractors Ltd | Construction | 2022 |
| RH Kingsway NO. 2 Limited | Real estate | 2019 |
| RH Kingsway NO.1 Limited | Real estate | 2017 |
| RH Ventures Limited | Administrative & support | 2004 |
| RHC Holdings Limited | Real estate | 2000 |
| RHC Trading Limited | Real estate | 2000 |
| Rhetorica Consulting Limited | Professional & scientific | 2023 |
| Rhhsr Limited | Real estate | 2013 |
| Rhino Therapeutics Limited | Professional & scientific | 2023 |
| RHM Telecommunications Holdings Limited | Financial services | 2015 |
| Rhubarb Marketing Ltd | Professional & scientific | 2025 |
| Rhys-Davies Properties Limited | Real estate | 1971 |
| RIA Services Limited | Health & social care | 2022 |
| Riagla (Governance, Risk and Compliance) Limited | Administrative & support | 2021 |
| Ribev Ltd | Information & communication | 2017 |
| Rich Applications Ltd | Other services | 2025 |
| Richard & Deborah Banton Ltd | Information & communication | 2024 |
| Richard Davidson Limited | Information & communication | 2024 |
| Richard Deacon Builders Limited | Construction | 2008 |
| Richard Dewick Ltd | Information & communication | 2005 |
| Richard Hadley Consulting Ltd | Administrative & support | 2013 |
| Richard Hall Window Cleaning Limited | Households | 2021 |
| Richard Holland Plumbing & Heating Limited | Construction | 2007 |