| RM Travel Flight Ltd | Administrative & support | 2026 |
| Rm-Barber Limited | Other services | 2023 |
| RMC Mechanical Services Limited | Construction | 2005 |
| RMD Auto Tech Limited | Wholesale & retail | 2026 |
| RMK Trading Ltd | Wholesale & retail | 2025 |
| RMP Digital Limited | Information & communication | 2025 |
| RMR Contractors Limited | Construction | 2018 |
| Rmrj Limited | Real estate | 2012 |
| RMS Heating Ltd | Construction | 2019 |
| RMV Technical Solutions Limited | Information & communication | 2015 |
| RMZ Global Limited | Wholesale & retail | 2025 |
| RN Computing Services Limited | Information & communication | 2023 |
| RN Transport & Construction Ltd | Construction | 2023 |
| RNB Property Limited | Real estate | 2007 |
| RNC Systems Limited | Professional & scientific | 2011 |
| RNJ Hair & Beauty Ltd | Other services | 2010 |
| RNR Capital Limited | Real estate | 2020 |
| RNR Develops Ltd | Real estate | 2025 |
| RNR Group Limited | Financial services | 2018 |
| RNR Traffic Management Limited | Public administration | 2020 |
| RNR UK 2014 Ltd | Manufacturing | 2013 |
| RO Driveline Auto Locksmith Limited | Administrative & support | 2025 |
| RO Estates Ltd | Real estate | 2010 |
| RO Maintenance Ltd | Construction | 2022 |
| ROA Properties Ltd | Real estate | 2022 |
| Road Bay Limited | Professional & scientific | 2023 |
| Road Link 2 Transport Ltd | Transport & logistics | 2026 |
| Road Test Services Limited | Wholesale & retail | 2017 |
| Road to Change C.I.C. | Other services | 2026 |
| Roadside Essentials Ltd | Wholesale & retail | 2025 |
| Roadtrack Services Ltd | Transport & logistics | 2024 |
| Roar Gill Limited | Manufacturing | 2012 |
| ROB Gill Tooling Supplies Ltd | Wholesale & retail | 2019 |
| Robert Baker Services Limited | Wholesale & retail | 2025 |
| Robert Selwood Ltd | Construction | 2020 |
| Robert Winner Ltd | Wholesale & retail | 2023 |
| Roberts Specialist Brickwork Services Limited | Construction | 2011 |
| Robinsons Management Company Limited | Households | 2003 |
| Robnet Ltd | Real estate | 2021 |
| Robust Education Consultants Ltd | Financial services | 2016 |
| Rochelle Cleaning Limited | Administrative & support | 2008 |
| Rock Forth Limited | Mining & quarrying | 2018 |
| Rock Garage (Wolverhampton) Limited | Wholesale & retail | 2011 |
| Rock House Property Holding Ltd | Real estate | 2026 |
| Rock N Road Group CIC | Arts & recreation | 2025 |
| Rock of Ages Property Holding Limited | Real estate | 2023 |
| Rock Solid Entertainment Ltd. | Information & communication | 2011 |
| Rock Wolves Limited | Hospitality | 2016 |
| Rockpool Inc Limited | Manufacturing | 1996 |
| Rocksby Ltd | Information & communication | 2026 |
| Rocksolid Consultancy Limited | Construction | 2017 |
| Rockspur C.I.C. | Other services | 2010 |
| Rockstar Livin Ltd | Wholesale & retail | 2025 |
| Rockwood Interactive Ltd | Information & communication | 2026 |
| Rocky Mart Ltd | Wholesale & retail | 2025 |
| Rocky Store Ltd | Wholesale & retail | 2025 |
| Rocky's Ameyaw Ltd | Public administration | 2019 |
| Rodax ZEE Ltd | Wholesale & retail | 2026 |
| Rodeos BBQ (Birmingham) Ltd | Hospitality | 2025 |
| Rodeos BBQ (Wolverhampton) Ltd | Hospitality | 2024 |
| Rodeos BBQ Group Ltd | Hospitality | 2024 |
| Rodeos Ranch Ltd | Hospitality | 2026 |
| Rodeos Western Store Ltd | Wholesale & retail | 2024 |
| Roderick Drive Ltd | Wholesale & retail | 2021 |
| Roebuck Homes Limited | Real estate | 2014 |
| ROEBUCK3483 Limited | Hospitality | 2019 |
| Roeducation Limited | Administrative & support | 2018 |
| Roger Evans Limited | Agriculture & fishing | 2001 |
| Rogers Habitat Properties LLP | | 2025 |
| Rogers Performance Management Limited | Other services | 2008 |
| Rogers Trading Ltd | Wholesale & retail | 2025 |
| Rogerstone Limited | Manufacturing | 2017 |
| Rogue Hair Limited | Other services | 2015 |
| Rohan Plumbing & Heating Ltd | Construction | 2025 |
| Rohit Gill Transport Ltd | Transport & logistics | 2025 |
| ROJ0 Pubs Limited | Hospitality | 2024 |
| Rojac Engineering Ltd | Manufacturing | 2006 |
| Rokah Ltd | Real estate | 2025 |
| Rokahrich Limited | Real estate | 2025 |
| Rolands Delivery Services Ltd | Transport & logistics | 2026 |
| Rolevet Limited | Manufacturing | 1989 |
| Roll in Paradise Ltd | Education | 2026 |
| Rollforming and Mechanical Services Ltd | Professional & scientific | 2019 |
| Rollinson Construction Limited | Construction | 2022 |
| Rolls Freight (Ireland) Limited | Transport & logistics | 2005 |
| Rolofex Limited | Hospitality | 2025 |
| Roma Wines and Spirits Ltd | Wholesale & retail | 2025 |
| Roma Wines Ltd | Administrative & support | 2017 |
| Romalyn Ante Ltd | Arts & recreation | 2022 |
| Roman Florin Removals Ltd | Wholesale & retail | 2024 |
| Romani’S Business Ltd | Transport & logistics | 2025 |
| Romaya Consulting Ltd | Other services | 2013 |
| Romeko Ltd | Construction | 2014 |
| Romell Henry Limited | Arts & recreation | 2021 |
| Romeo's Bar & Night Club Ltd | Hospitality | 2025 |
| Romi Music UK Ltd | Information & communication | 2024 |
| Romwood Unlimited | Administrative & support | 2019 |
| Ronald James Property Holdings Ltd | Real estate | 2017 |
| Rondel Holdings Ltd | Real estate | 2022 |
| Rondel Trading Ltd | Wholesale & retail | 2016 |