| Robo Savers Limited | Health & social care | 2024 |
| Robopharma Limited | Professional & scientific | 2016 |
| Robore Mentis Apparel Ltd | Wholesale & retail | 2022 |
| Robs Fish & Chip Bar Limited | Wholesale & retail | 2003 |
| Robson Commercial Services (RCS) Limited | Administrative & support | 2015 |
| Robsons Automotive Consultancy Ltd | Administrative & support | 2026 |
| Roby Logistics Ltd | Construction | 2021 |
| Robyn Aesthetics Ltd | Other services | 2026 |
| Rocca Engineering Services Limited | Professional & scientific | 2013 |
| Roccida Limited | Administrative & support | 1980 |
| Rock .BUB Ltd | Wholesale & retail | 2020 |
| Rock Lizard Limited | Administrative & support | 2025 |
| Rock People Management Limited | Arts & recreation | 2019 |
| Rock People Management Live Limited | Arts & recreation | 2022 |
| Rock SH Ltd | Financial services | 2023 |
| Rock SI Ltd | Financial services | 2025 |
| Rockfield Road Limited | Households | 2020 |
| Rockliffe Construction Limited | Construction | 2000 |
| Rodica Diaconu Ltd | Administrative & support | 2023 |
| Rodon Advisory Ltd | Professional & scientific | 2017 |
| Rodrigo Consulting Limited | Information & communication | 2013 |
| Rofsix Ltd | Information & communication | 2025 |
| Roger Parfitt Ltd | Administrative & support | 2023 |
| Rogex Ltd | Wholesale & retail | 2025 |
| Rogham Ltd | Construction | 2013 |
| Rogue Ninja (Stoke) Limited | Arts & recreation | 2017 |
| Roilgate Limited | Professional & scientific | 1989 |
| ROJ Turkish Style Ltd | Other services | 2025 |
| ROK Financial Consulting Limited | Administrative & support | 2024 |
| Rokalite Ltd | Administrative & support | 2018 |
| Rokaya Ltd | Administrative & support | 2025 |
| Rollhaus Ltd | Real estate | 2018 |
| Rollin Stoves Catering Ltd | Hospitality | 2023 |
| Romac Engineering Services Ltd | Professional & scientific | 2020 |
| Roman Heights (Management Company) Limited | Households | 2023 |
| Roman Resins Ltd | Construction | 2023 |
| Romanov Engineering Limited | Administrative & support | 2014 |
| Romarmed Ltd | Transport & logistics | 2024 |
| Romeo Bravo Aviation Limited | Transport & logistics | 2025 |
| RON Finch Ltd | Administrative & support | 2019 |
| RON Jones Limited | Professional & scientific | 2005 |
| RON Munro Carpets Ltd | Wholesale & retail | 1997 |
| RON Spencer Cycles Limited | Wholesale & retail | 1977 |
| RON Steal Limited | Administrative & support | 2015 |
| Ronkswood IT Ltd | Information & communication | 2023 |
| Ronny & Bingo Travel Limited | Construction | 2026 |
| Roof Analytics LLP | | 2016 |
| Rookwood Engineering Limited | Administrative & support | 2012 |
| Rootgate Engineering Ltd | Administrative & support | 2026 |
| Rory Holdings Limited | Financial services | 2021 |
| Rory Menzies Limited | Administrative & support | 2026 |
| Rosar Homes Limited | Real estate | 2021 |
| Rose & Webber Ltd | Real estate | 2022 |
| Rose Brickwork Ltd | Construction | 2019 |
| Rose Property Specialists Limited | Construction | 2022 |
| Roseberry Cook Limited | Administrative & support | 2022 |
| Rosedale Construction (Cheshire) Limited | Construction | 2003 |
| Rosedale Joinery Limited | Construction | 2011 |
| Rosemont Consulting Ltd | Professional & scientific | 2023 |
| Rosemoore Group Ltd | Real estate | 2024 |
| Rosevilla Residential Home Limited | Health & social care | 2003 |
| Rosey Homes Limited | Real estate | 2025 |
| Ross Hemsley Ltd | Professional & scientific | 2019 |
| Ross James Povey Limited | Professional & scientific | 2018 |
| Rossco Electrical Limited | Administrative & support | 2017 |
| Rotor Machine Limited | Administrative & support | 2024 |
| Roubens Legal Consulting Ltd | Administrative & support | 2023 |
| Rouellan Limited | Administrative & support | 2023 |
| Rough Birch Worth Limited | Construction | 2021 |
| Roundforce Limited | Administrative & support | 2012 |
| Route 47 Commercials Ltd | Administrative & support | 2026 |
| Route Organisation Holdings Limited | Professional & scientific | 2017 |
| Route Organisation Limited | Professional & scientific | 2004 |
| Route Organisation Properties Limited | Real estate | 2017 |
| Rovewide Holdings Limited | Financial services | 2020 |
| Rovira-Barron Limited | Health & social care | 2023 |
| Rowan Tree Imaging Ltd | Health & social care | 2025 |
| Rowan Tree Management Limited | Wholesale & retail | 2025 |
| Rowe Growth Ltd | Information & communication | 2026 |
| Rowjun Moore Counselling Ltd | Health & social care | 2022 |
| Rowley Homes Limited | Real estate | 2018 |
| Rowley Layout Services Ltd | Administrative & support | 2026 |
| Rowswood Legal Limited | Professional & scientific | 2016 |
| Rowswood Timber Ltd | Wholesale & retail | 2020 |
| Rowswood Timber Supplies Ltd | Real estate | 2014 |
| Roxvic Ltd | Wholesale & retail | 2026 |
| ROY Trevor Limited | Transport & logistics | 1960 |
| ROY Wadsworth Carpets & Flooring Ltd | Wholesale & retail | 2014 |
| Royer Quality Consulting Limited | Administrative & support | 2024 |
| Roza Consulting Limited | Professional & scientific | 2018 |
| Rozafa (Manchester) Limited | Hospitality | 2011 |
| Rozafa (Stockport) Limited | Hospitality | 2012 |
| RP Design Solutions Limited | Professional & scientific | 2010 |
| RP Hydro Limited | Administrative & support | 2015 |
| RP Plumbing Design Ltd | Professional & scientific | 2022 |
| RP Property Maintenance Ltd | Construction | 2011 |
| RPC Electrical Services Ltd | Construction | 2010 |
| RPC Ventures Limited | Hospitality | 2012 |
| Rpcs Consultants Limited | Professional & scientific | 2014 |
| RPG Rail Ltd | Professional & scientific | 2022 |