| Rosenberg Limited | Professional & scientific | 2014 |
| Rosewoods Flooring UK Ltd | Wholesale & retail | 2022 |
| Rosey's Barbers & Salon (Eldon ST) Ltd | Other services | 2016 |
| Rosey's Barbers & Salon Ltd | Other services | 2015 |
| Rose’S Caribbean Kitchen Ltd | Hospitality | 2025 |
| Rosie Dickson Case Management Ltd | Health & social care | 2026 |
| Ross Browne Insourcing Limited | Professional & scientific | 2024 |
| Ross Greenwood TM Ltd | Public administration | 2022 |
| Rossington Best Pizza Ltd | Hospitality | 2023 |
| Rossington Chicken Limited | Hospitality | 2025 |
| Rossington Early Learners Limited | Education | 2011 |
| Rossington Hall Estate Ltd | Real estate | 2025 |
| Rossington Hall Holdings Ltd | Financial services | 2025 |
| Rossington Hall Leisure Ltd | Hospitality | 2025 |
| Rossington Hall Limited | Hospitality | 2010 |
| Rossington Local Ltd | Wholesale & retail | 2025 |
| Rossington Miners' Welfare Scheme Social Club Limited | Hospitality | 1992 |
| Rossington Properties Ltd | Real estate | 2011 |
| Rother Valley Tree Services Limited | Agriculture & fishing | 2010 |
| Rotherglen Associates Limited | Professional & scientific | 2005 |
| Rotherham Sand and Gravel Company Limited(The) | Mining & quarrying | 1930 |
| Rothwell Consultancy Ltd | Professional & scientific | 2014 |
| Rouge Perfumes Ltd | Wholesale & retail | 2026 |
| Rougeâtre Ltd | Wholesale & retail | 2020 |
| Roulston Plant Services Ltd | Mining & quarrying | 2019 |
| Roundbrand Limited | Manufacturing | 1987 |
| Roundhouse Engineering Co. Ltd | Manufacturing | 1999 |
| Roundroom Production Limited | Professional & scientific | 2006 |
| Rounds Wholesale Ltd | Wholesale & retail | 2009 |
| Routetaz Limited | Transport & logistics | 2023 |
| Routine Accounts Ltd | Professional & scientific | 2026 |
| Rovi Limited | Health & social care | 2006 |
| Rowan Comm Limited | Real estate | 2018 |
| Rowanbridge United Limited | Extraterritorial | 2026 |
| Rowans Fire Limited | Professional & scientific | 2014 |
| Rowden Rentals Ltd | Real estate | 2022 |
| Rowe Doors Ltd | Construction | 2022 |
| Rowglo Plumbing and Heating Limited | Construction | 2020 |
| Rowley Family Holdings Ltd | Financial services | 2025 |
| Roxana Beauty Studio Ltd | Other services | 2020 |
| Roxholme Trout Farm & Fishery Ltd | Agriculture & fishing | 2021 |
| Roxius Ltd | Wholesale & retail | 2025 |
| ROY Kilner Homes Limited | Construction | 2015 |
| ROY Lucas Limited | Transport & logistics | 2015 |
| ROY Marriott Limited | Transport & logistics | 2015 |
| Royalty Barber Salon Limited | Other services | 2020 |
| Roycbent Ltd | Construction | 2022 |
| RP Drilling Limited | Construction | 2007 |
| RPC Holdings Limited | Real estate | 2017 |
| RPD Holdings Limited | Financial services | 2015 |
| RPM Ceilings & Partitions Limited | Construction | 2019 |
| RPM Transport Limited | Transport & logistics | 2023 |
| RPS Group Holdings Limited | Manufacturing | 2020 |
| RPS Installations (Yorkshire) Ltd | Construction | 2019 |
| RPS Rail Services Limited | Other services | 2016 |
| RQ Aesthetics Ltd | Other services | 2025 |
| RR Houses Limited | Real estate | 2018 |
| Rramy Services Limited | Education | 2023 |
| RRC Health Ltd | Health & social care | 2024 |
| RRR Sports Limited | Administrative & support | 2019 |
| RRS Doncaster Limited | Transport & logistics | 2023 |
| RRS Hull Limited | Transport & logistics | 2023 |
| RRS Recovery Commercials Limited | Transport & logistics | 2022 |
| RRS York Limited | Transport & logistics | 2023 |
| RRV Recruitment Ltd | Administrative & support | 2018 |
| RS Advantages Ltd | Manufacturing | 2013 |
| RS and C Engineering Limited | Construction | 2014 |
| RS Consultancy 1987 Ltd | Professional & scientific | 2025 |
| RS Displays Ltd | Manufacturing | 2007 |
| RS Distribution (UK) Ltd | Wholesale & retail | 2012 |
| RS Sales Nottingham Limited | Manufacturing | 2013 |
| RS Total Roofing Ltd | Construction | 2024 |
| RS Trading Group Ltd | Wholesale & retail | 2022 |
| RS Vehicle Paintwork Limited | Wholesale & retail | 2012 |
| RS VEL Ltd | Wholesale & retail | 2024 |
| RS VEL Properties Ltd | Real estate | 2025 |
| RS4 Properties Ltd | Real estate | 2022 |
| RSB Auto Service Ltd | Wholesale & retail | 2025 |
| RSC Electrical Ltd | Manufacturing | 2014 |
| RSC Project Solutions Ltd | Construction | 2019 |
| RSC Properties Limited | Real estate | 2019 |
| Rscpbr 1 Limited | Financial services | 2023 |
| Rscpbr 2 Limited | Financial services | 2023 |
| Rscpbr 3 Limited | Financial services | 2023 |
| Rscpbr a Limited | Financial services | 2023 |
| Rscpbr B Limited | Financial services | 2023 |
| Rscpbr C Limited | Financial services | 2023 |
| Rscpbr Limited | Financial services | 2017 |
| RSF Engineering Limited | Construction | 2015 |
| Rsfabs Ltd | Manufacturing | 2025 |
| RSH Medical Services Ltd | Health & social care | 2014 |
| RSM Joinery & Building Ltd | Construction | 2018 |
| RSM Lining Supplies Global Ltd | Wholesale & retail | 2007 |
| RSN Transport Limited | Transport & logistics | 2018 |
| RST Land Developments Limited | Real estate | 2015 |
| RSU Transport Ltd | Transport & logistics | 2025 |
| Rswiftwindows Ltd | Construction | 2022 |
| RT Consulting & Partners Limited | Professional & scientific | 2022 |
| RT Developments Ltd | Construction | 2023 |
| RT Merch Ltd | Wholesale & retail | 2025 |