| Redpoint Architecture Limited | Information & communication | 2012 |
| Redsand Wholesale and Distribution Limited | Wholesale & retail | 2025 |
| Redsprint Limited | Information & communication | 2006 |
| Redwin Atelier Ltd | Manufacturing | 2025 |
| Redwing Asia Ltd | Professional & scientific | 1995 |
| Redwing Ventures 2 Ltd | Professional & scientific | 2023 |
| Reebastyle Ltd | Wholesale & retail | 2025 |
| Reedman Ingredients Limited | Manufacturing | 2017 |
| Reef Homes Limited | Construction | 2018 |
| Reef Majorca Limited | Real estate | 2018 |
| Reef Properties Limited | Construction | 2016 |
| Reef Property Investments Limited | Construction | 2016 |
| Refactor & Restore Ltd | Information & communication | 2026 |
| Reffitt Tech Ltd | Information & communication | 2022 |
| Refina Holdings Limited | Financial services | 2026 |
| Refina Limited | Wholesale & retail | 1997 |
| Refina Properties Limited | Real estate | 2026 |
| Refinity Auto Paint Repair Ltd | Wholesale & retail | 2025 |
| Reflaegis Limited | Manufacturing | 2017 |
| Reflect-In C.I.C. | Administrative & support | 2024 |
| Reflection X Ltd | Administrative & support | 2014 |
| Reformed Plastics (UK) Limited | Manufacturing | 2006 |
| Reformed Wellbeing Limited | Health & social care | 2012 |
| REFURB4ALL Limited | Other services | 2025 |
| Regal Display Limited | Wholesale & retail | 2021 |
| Regal Property Management Limited | Real estate | 2025 |
| Regency Mortgage Corporation Limited | Financial services | 1998 |
| Regency Oldhomes Limited | Health & social care | 1988 |
| Regency Park Christchurch Limited | Real estate | 1997 |
| Regency Solutions Limited | Administrative & support | 2005 |
| Regentiq Spire Limited | Information & communication | 2026 |
| Reggae’S Groove Cafe Ltd | Hospitality | 2026 |
| Regno Consulting Limited | Professional & scientific | 2023 |
| Regno Estates Management Limited | Professional & scientific | 2024 |
| Regula Cleaners Ltd | Administrative & support | 2026 |
| Regworks Ltd | Professional & scientific | 2025 |
| REH (Opco 4) Ltd | Hospitality | 2026 |
| Reham's Transloom Ltd | Professional & scientific | 2023 |
| REI Consult Ltd | Health & social care | 2022 |
| Reid Bikes Limited | Wholesale & retail | 2014 |
| Reign in Your Cloud Ltd | Information & communication | 2024 |
| Rejuvance Aesthetics Ltd | Health & social care | 2026 |
| Rekrut Ltd | Information & communication | 2021 |
| REL Digital Ltd | Administrative & support | 2017 |
| Relay Ecommerce Limited | Wholesale & retail | 2024 |
| Reliable Waste Clearance Ltd | Water & waste | 2022 |
| Reliablebuys Ltd | Wholesale & retail | 2025 |
| Reliance Parkstone Holdings Limited | Financial services | 2023 |
| Reliance Parkstone Properties Limited | Real estate | 2023 |
| Reliance Scrap Metal Merchants (Parkstone) Limited | Wholesale & retail | 1954 |
| Relico Limited | Wholesale & retail | 2021 |
| Rellion Ltd | Administrative & support | 2026 |
| Reloads Media House Limited | Information & communication | 2023 |
| REM Property Investment Ltd | Administrative & support | 2019 |
| Remarkable Interior Solutions Ltd | Construction | 2022 |
| Remember When Classic Movies Limited | Extraterritorial | 2016 |
| Remon Properties Ltd | Real estate | 2022 |
| Rempstone Autos Limited | Households | 2011 |
| Renais Spirits Ltd | Wholesale & retail | 2022 |
| Renaissance Vehicles Ltd | Manufacturing | 2007 |
| Renart Interactive Ltd | Information & communication | 2018 |
| Renascence Gymnastics Limited | Arts & recreation | 2011 |
| Rencber Limited | Hospitality | 2025 |
| Rendebt Services Ltd | Professional & scientific | 2010 |
| Render Zone Ltd | Wholesale & retail | 2021 |
| Rendertech Innovation Ltd | Information & communication | 2025 |
| Rendlesham Investments Ltd | Administrative & support | 2023 |
| Renew Pipelines Ltd | Energy | 2024 |
| Renewable Energy Co (South) Ltd | Construction | 2023 |
| Renkei Method Ltd | Wholesale & retail | 2025 |
| Reno LAB Ltd | Professional & scientific | 2019 |
| Renoire Hotels Ltd | Hospitality | 2025 |
| Renolab Rentals Ltd | Real estate | 2024 |
| Renovate Property Solutions Limited | Construction | 2025 |
| Renowned Catering Limited | Wholesale & retail | 2012 |
| Renspec Repairs Limited | Wholesale & retail | 2003 |
| Rentably Limited | Hospitality | 2020 |
| RENTAL4YOU Limited | Administrative & support | 2020 |
| Rentec Limited | Construction | 2008 |
| Rentec Special Projects Ltd | Construction | 2026 |
| Rentech Garage Ltd | Wholesale & retail | 2024 |
| Renzo Automotive Limited | Administrative & support | 2019 |
| Repair Labs Retail Ltd | Manufacturing | 2009 |
| Repairs Incorporated Limited | Manufacturing | 2020 |
| Replete Labs Limited | Manufacturing | 2025 |
| Reply Review Enterprises Ltd | Information & communication | 2026 |
| Repp Strength Limited | Health & social care | 2023 |
| Repton House (Bournemouth) Management Limited | Households | 2018 |
| Reputation Mafia Ltd | Administrative & support | 2018 |
| Resae Limited | Professional & scientific | 2024 |
| Resdev Consulting Ltd | Professional & scientific | 2023 |
| Reshmafitness Ltd | Information & communication | 2022 |
| Resilience at Work Limited | Professional & scientific | 2017 |
| Resilience Ukraine Limited | Public administration | 2022 |
| Resilient Energy Alvington Court Limited | Professional & scientific | 2012 |
| Resilient Energy Cherry Rock Limited | Professional & scientific | 2011 |
| Resilient Energy Mounteneys Limited | Professional & scientific | 2011 |
| Resiview Limited | Professional & scientific | 2024 |
| Resoauth Ltd | Information & communication | 2023 |
| Resolute Mortgages Limited | Financial services | 2022 |