| Roman Property Investors Ltd | Real estate | 2019 |
| Romanian + Community Centre (West Midlands) CIC | Other services | 2019 |
| Romanian Nurses & Healthcare Professionals Association UK Limited | Other services | 2025 |
| Romans Security Company Ltd | Administrative & support | 2022 |
| Romia Consulting Ltd | Information & communication | 2018 |
| RON Estates Ltd | Real estate | 2024 |
| Ronfolkiux Ltd | Administrative & support | 2024 |
| Ronziumyst Ltd | Transport & logistics | 2024 |
| Roobarb Retail Limited | Wholesale & retail | 2014 |
| Roofnet Limited | Construction | 2019 |
| Rooftopia Limited | Construction | 2024 |
| ROOM4 Construction Ltd | Construction | 2014 |
| Rooster Publishing Ltd | Wholesale & retail | 2023 |
| Root Ventures Limited | Health & social care | 2018 |
| Root Ventures Properties Ltd | Real estate | 2022 |
| Rooted Supps Ltd | Wholesale & retail | 2026 |
| Roots of Care Ltd | Financial services | 2024 |
| Roots of Support Limited | Health & social care | 2026 |
| Roro Cars Ltd | Wholesale & retail | 2023 |
| Rose & Crown (Ludlow) Ltd | Hospitality | 2016 |
| Rose Alexander Garden Design Ltd | Administrative & support | 2024 |
| Rose Gold Parlour Ltd | Other services | 2018 |
| Rosebrooke Limited | Wholesale & retail | 2022 |
| Rosemary's Smile Care Limited | Health & social care | 2023 |
| Rosetinted Financial Services C.I.C. | Professional & scientific | 2019 |
| Rosewilma Limited | Health & social care | 2025 |
| Rosewood Chip Shop Limited | Hospitality | 2026 |
| Roshman Property Services Ltd | Real estate | 2026 |
| Rosora Neurodiversity Coaching Ltd | Other services | 2026 |
| Rossway Dowd Holdings Limited | Construction | 2004 |
| Rotahurst (Management Services) Ltd | Wholesale & retail | 1998 |
| Rotation Consulting Limited | Professional & scientific | 2007 |
| Roti Express.Tm Ltd | Hospitality | 2025 |
| Roti Naan Express Limited | Hospitality | 2026 |
| Rotometrics International Limited | Manufacturing | 1989 |
| Roundhill Boarding Kennels Limited | Other services | 2020 |
| Routley Commercial Management Ltd | Professional & scientific | 2014 |
| Routley Property Management Ltd | Real estate | 2019 |
| Rouzemfi Ltd | Transport & logistics | 2024 |
| Rowan Court Residents Association Limited | Real estate | 1985 |
| Rowan Edwards Limited | Real estate | 2003 |
| Rowan Lets Ltd | Real estate | 2026 |
| Rowley Street Motors Limited | Wholesale & retail | 2017 |
| Royaal City Cars Ltd | Transport & logistics | 2024 |
| Royal Sutton Construction Ltd | Construction | 2026 |
| Royale Clothing Ltd | Wholesale & retail | 2026 |
| Royale Fish Bar Ltd | Hospitality | 2023 |
| Royalties Childcare Company Limited | Wholesale & retail | 2012 |
| Royl Shopfronts U.K. Ltd | Manufacturing | 2025 |
| RP Eyecare (Sandbach) Ltd | Wholesale & retail | 2022 |
| RP Nurseries Ltd | Education | 2025 |
| RP Purchasing Ltd | Wholesale & retail | 2024 |
| RP Vision Ltd | Wholesale & retail | 2019 |
| Rpal Services Limited | Construction | 2025 |
| RPG Access Services Ltd | Administrative & support | 2023 |
| Rpl.Lifts Ltd | Construction | 2025 |
| RR & Restaurant Ltd | Hospitality | 2026 |
| RR Consulting Limited | Professional & scientific | 2015 |
| RRL Estate Ltd | Real estate | 2020 |
| RRM Haulage Ltd | Transport & logistics | 2025 |
| RRR Sports Horses Ltd | Agriculture & fishing | 2022 |
| Rrtransporters Ltd | Transport & logistics | 2024 |
| RS Business Limited | Administrative & support | 2022 |
| RS Cars & Parts Ltd | Wholesale & retail | 2018 |
| RS Medica Ltd | Health & social care | 2020 |
| RS Motors (Walsall) Limited | Wholesale & retail | 2018 |
| RS Occasions Ltd | Administrative & support | 2025 |
| RS Saleem Ltd | Other services | 2019 |
| RS Tuition Limited | Education | 2016 |
| RSC & E Transport Limited | Transport & logistics | 2014 |
| RSC Carpentry Design and Build Ltd | Manufacturing | 2013 |
| RSC Home Construction Ltd | Construction | 2024 |
| RSK Investment Property Ltd | Real estate | 2020 |
| RSM Retailers Ltd | Wholesale & retail | 2023 |
| RSO Maintenance Ltd | Construction | 2024 |
| RSP Contractors Limited | Construction | 2011 |
| RSS Property Build Limited | Construction | 2021 |
| Rssn Limited | Wholesale & retail | 2025 |
| RST Electrical Engineering & Contracting Ltd | Construction | 2017 |
| Rsvs Constructions Limited | Construction | 2025 |
| RSW Group Ltd | Hospitality | 2023 |
| RTA Ltd | Wholesale & retail | 2022 |
| RTC Electrical Ltd | Construction | 2021 |
| RTD Contracts Limited | Construction | 2014 |
| RTI Properties Ltd | Real estate | 2022 |
| RTM Ventures Ltd | Wholesale & retail | 2025 |
| RTP Consultancy Limited | Real estate | 2025 |
| Rtrio Limited | Administrative & support | 2016 |
| Rubbernek Fittings Limited | Manufacturing | 1965 |
| Rubemah RBM Healthcare Services Limited | Administrative & support | 2019 |
| Rubric Health Limited | Real estate | 2014 |
| Ruby & Amisha Property Rentals Ltd | Real estate | 2026 |
| Ruby Care Group Limited | Health & social care | 2025 |
| Ruby the Cake Artist Ltd | Wholesale & retail | 2019 |
| Rudds Roofing Limited | Construction | 2025 |
| Rudt Properties Ltd | Real estate | 2025 |
| Rugeley Coating Services Limited | Manufacturing | 2015 |
| Rugs Direct 2 U Ltd | Extraterritorial | 2009 |
| Rugsmart Limited | Wholesale & retail | 2014 |
| Rukodzi Group Ltd | Other services | 2021 |