| REDI-87 Limited | Real estate | 2001 |
| Redone Bridgend Ltd | Hospitality | 2024 |
| Redram Ltd | Water & waste | 2023 |
| Redwinger Holdings Limited | Administrative & support | 2008 |
| Redwood Environmental Services Limited | Water & waste | 2003 |
| Redwood Hire Sales and Service Ltd | Other services | 2011 |
| Redwood Waste Treatment Centre Limited | Water & waste | 2010 |
| Reedarch Limited | Extraterritorial | 2025 |
| Reedcare Limited | Construction | 2025 |
| Rees Heating Limited | Construction | 2025 |
| Reeses Property Ltd | Real estate | 2025 |
| REFFELL07 Promotions Limited | Information & communication | 2022 |
| Reflex Sales Limited | Wholesale & retail | 2022 |
| Rehoboth Commerce Limited | Wholesale & retail | 2025 |
| REL Acoustics Limited | Manufacturing | 2005 |
| Relational Communication Practice Limited | Health & social care | 2022 |
| Reliable Finance and Mortgages Ltd | Financial services | 2023 |
| Rely on Tyres Ltd | Manufacturing | 2023 |
| Remit Ltd | Information & communication | 2012 |
| Remnant Christian Network Bridgend Ltd | Other services | 2026 |
| Remprop Ltd | Real estate | 2017 |
| Renewuhealthandwellness Ltd | Other services | 2023 |
| Renovae Limited | Construction | 2025 |
| Renovate (Wales) Limited | Construction | 2012 |
| Renovation Plus Limited | Construction | 2024 |
| Renovolt Electrical Ltd | Construction | 2025 |
| Renowheel Limited | Wholesale & retail | 2005 |
| Rent a Tech Vehicle Services Ltd | Wholesale & retail | 2022 |
| Rent-It Pencoed Limited | Real estate | 2017 |
| Rent-It Plant Hire & Sales Ltd | Administrative & support | 2020 |
| Rentitude Ltd | Professional & scientific | 2024 |
| Repeatability Ltd. | Manufacturing | 2017 |
| Reptile World Limited | Wholesale & retail | 2011 |
| RES SW Ltd | Construction | 2022 |
| Resin Response Ltd | Administrative & support | 2019 |
| Resonate Recruitment Limited | Administrative & support | 2026 |
| Rest Bay Surf Ltd | Education | 2019 |
| Restruct Holdings Limited | Construction | 2015 |
| Restruct Limited | Construction | 1985 |
| Restruct Property Development LLP | | 2016 |
| Retribution Film Limited | Information & communication | 2014 |
| Retro Additive Ltd | Manufacturing | 2024 |
| Reval Continuing Care Limited | Wholesale & retail | 2004 |
| Revive Aesthetics Bridgend Limited | Other services | 2025 |
| Revive Prescribed Limited | Health & social care | 2019 |
| Reynavs Limited | Health & social care | 2013 |
| Reynolds Brickwork Ltd | Construction | 2024 |
| RFC Leisure Ltd | Real estate | 2021 |
| RFL Logistics Ltd | Transport & logistics | 2018 |
| RG Taste Limited | Hospitality | 2025 |
| RGW Property and Maintenance Ltd | Real estate | 2024 |
| RH & J Solutions Ltd | Professional & scientific | 2004 |
| RH Properties & Investments Limited | Financial services | 2022 |
| Rhidian Jones Financial Advice & Compliance Services Ltd | Financial services | 2018 |
| Rhielemor Ltd | Professional & scientific | 2024 |
| Rhiw Market Hall CIC | Real estate | 2025 |
| Rhondda Development Agency Limited | Administrative & support | 1990 |
| Rhys Griffiths Limited | Health & social care | 2009 |
| Rhys Huish Commercials Limited | Wholesale & retail | 2019 |
| Rhys Huish Van Hire Ltd | Administrative & support | 2025 |
| Richard J Lewis Consultancy Services Ltd | Administrative & support | 2020 |
| Richard Price Community Centre Limited | Arts & recreation | 2006 |
| Richardson Capital Group Ltd | Construction | 2022 |
| Ricrose Limited | Health & social care | 2023 |
| Ride Bikes Wales Ltd | Wholesale & retail | 2012 |
| Ride Like a Girl CIC | Administrative & support | 2026 |
| Ridge Consultancy International Limited | Professional & scientific | 2015 |
| Ridgebag Ltd | Manufacturing | 2017 |
| Ridgeway Leisure Limited | Wholesale & retail | 2006 |
| Right Boiiz Limited | Wholesale & retail | 2025 |
| Riph Contracting Services Ltd | Construction | 2026 |
| Rise Recruit Limited | Administrative & support | 2022 |
| Risecote Limited | Extraterritorial | 2024 |
| Risedere Limited | Extraterritorial | 2026 |
| Riseglen Limited | Information & communication | 2020 |
| Risewynn Limited | Wholesale & retail | 2024 |
| Rising Phoenix Marketing Limited | Professional & scientific | 2026 |
| Ritch Automotive Ltd | Wholesale & retail | 2025 |
| Rivendell Financial Services Limited | Financial services | 2004 |
| River Valley Ltd | Administrative & support | 2025 |
| Rivereve Limited | Extraterritorial | 2025 |
| Riverrow Limited | Hospitality | 2007 |
| Riverside Air Conditioning Limited | Manufacturing | 2013 |
| Riverside Hardware & Engineers Supplies Limited | Extraterritorial | 2013 |
| Riverside Industrial Equipment Limited | Manufacturing | 1983 |
| Riverside Secure Storage Limited | Transport & logistics | 2026 |
| RJG Logistics and Removals Ltd | Transport & logistics | 2023 |
| RL Athletes Clothing Limited | Wholesale & retail | 2025 |
| RL Coaching Limited | Arts & recreation | 2023 |
| RL Property 1 Limited | Real estate | 2025 |
| RLD Holding Company Limited | Financial services | 2025 |
| RLD Venture Company Limited | Real estate | 2025 |
| RLE Law Practice Ltd | Professional & scientific | 2010 |
| RM Bradley Delivery Services Ltd | Transport & logistics | 2025 |
| RM Bridgend Limited | Information & communication | 2015 |
| RM Carpentry & Construction Ltd | Construction | 2023 |
| RM Social Limited | Professional & scientific | 2024 |
| RM Trees Ltd | Administrative & support | 2023 |
| RMB Consultancy Limited | Professional & scientific | 2023 |
| RMW Dental Limited | Health & social care | 2024 |