| RKS Store Ltd | Wholesale & retail | 2017 |
| Rkss Trading Ltd | Wholesale & retail | 2026 |
| RKT Contractors Ltd | Construction | 2021 |
| Rldc Professionals Ltd | Health & social care | 2025 |
| RLH Homes Ltd | Real estate | 2023 |
| Rlkm Southwest Properties Ltd | Construction | 2026 |
| RLKM888 Ltd | Other services | 2023 |
| Rllt Services Limited | Transport & logistics | 2021 |
| RLM Holdings Limited | Information & communication | 2016 |
| RLM Property Holdings Limited | Construction | 2025 |
| RLS Swindon Services Ltd | Professional & scientific | 2022 |
| RM Power & Data Solutions Ltd | Energy | 2015 |
| RMB Communications Limited | Information & communication | 2011 |
| RMB Trans Ltd | Transport & logistics | 2014 |
| RMD Site Operations Ltd | Construction | 2023 |
| RMF IT Ltd | Information & communication | 2017 |
| RMH Software Limited | Information & communication | 2008 |
| Rmkjv Bristol Sunbeds 1 Ltd | Wholesale & retail | 2025 |
| Rmkjv Build and Imports Ltd | Wholesale & retail | 2025 |
| Rmkjv Gloucester Sunbeds 1 Ltd | Wholesale & retail | 2025 |
| Rmkjv Holdings Ltd | Financial services | 2025 |
| Rmkjv Master Holdings Ltd | Wholesale & retail | 2025 |
| Rmlogix Consulting Ltd | Information & communication | 2019 |
| RMT Stores Ltd | Wholesale & retail | 2026 |
| RNM Accountancy Ltd | Professional & scientific | 2018 |
| Roachwood Limited | Transport & logistics | 2020 |
| Road Runner Courier Service Limited | Transport & logistics | 2018 |
| Road Runner Recruitment Ltd | Administrative & support | 2025 |
| Road to Glory Limited | Arts & recreation | 2019 |
| Roadcraft & Rail Ltd | Transport & logistics | 2026 |
| Roadstarz Sports Education Ltd | Education | 2021 |
| Roam Wild Safaris Ltd | Administrative & support | 2025 |
| Roan Hospitality Limited | Hospitality | 2015 |
| ROB Mashford Projects Ltd | Professional & scientific | 2023 |
| ROB Walsh Financial Services Ltd | Professional & scientific | 2011 |
| Robby Transport Ltd | Transport & logistics | 2019 |
| Robert Lawrence Creative Solutions Limited | Other services | 2004 |
| Robert Transport Limited | Transport & logistics | 2021 |
| Robertson Renovations & Maintenance Ltd | Construction | 2024 |
| Robin Logistics Ltd | Transport & logistics | 2018 |
| Robin Performance Ltd | Wholesale & retail | 2019 |
| Robinson Grace Consultancy Ltd | Professional & scientific | 2022 |
| Robinswood Developments Ltd | Construction | 2025 |
| Robnor Resinlab Limited | Manufacturing | 1960 |
| Robnor Resins Limited | Extraterritorial | 1995 |
| Robosim Design Engineering Limited | Extraterritorial | 2008 |
| Robson Nether Fenn Limited | Construction | 2017 |
| Robustaff Solutions Ltd | Administrative & support | 2014 |
| Robyn Hughes Dental Care Ltd | Health & social care | 2013 |
| ROC Clinics UK Ltd | Health & social care | 2023 |
| ROC Health Group Limited | Financial services | 2022 |
| ROC Health Holdings Limited | Financial services | 2023 |
| ROC Health Services Limited | Health & social care | 2010 |
| ROC Systems Limited | Wholesale & retail | 1996 |
| Roca Blue Limited | Construction | 2014 |
| Rocarpathian Ltd | Transport & logistics | 2026 |
| Roccair Limited | Professional & scientific | 2014 |
| Rocco Castagno Ltd | Energy | 2022 |
| Rocha Rentals Ltd | Administrative & support | 2022 |
| Rock Aggregates Ltd | Wholesale & retail | 2021 |
| Rock and Clay Construction Limited | Construction | 2025 |
| Rock Groundwork Ltd | Construction | 2020 |
| Rock Squid Entertainment Ltd | Hospitality | 2026 |
| Rock Studio Limited | Manufacturing | 2011 |
| Rocket Bangla Music Limited | Information & communication | 2025 |
| Rockies Caribbean Takeaway Limited | Hospitality | 2023 |
| Rockley Energy Limited | Extraterritorial | 2023 |
| Rockley Fuels Limited | Extraterritorial | 2023 |
| Rockley Holdings Limited | Financial services | 2018 |
| Rockley Transport Limited | Transport & logistics | 1983 |
| Rockstar Climbing Limited | Arts & recreation | 2014 |
| Rockstone Surfacing Group Holdings Limited | Financial services | 2024 |
| Rockstone Surfacing Limited | Construction | 1985 |
| Rockyventures Ltd | Arts & recreation | 2017 |
| Rodbourne Kitchen Ltd | Hospitality | 2025 |
| Rodbourne Road PO Ltd | Transport & logistics | 2017 |
| Rodney’S Catering Ltd | Hospitality | 2022 |
| Rogers and Townsend Limited | Construction | 2011 |
| Rohan Housing Limited | Real estate | 2025 |
| Rojo Renovations Ltd | Real estate | 2015 |
| ROL Cost Consulting Ltd | Professional & scientific | 2018 |
| Roleypoley Trust | Administrative & support | 2019 |
| Rollings Shopfitting Limited | Construction | 2012 |
| Rolts Print Consultants Ltd | Manufacturing | 2025 |
| Romanek Promotions Limited | Administrative & support | 2023 |
| Romanian & Polish Supermarket Ltd | Wholesale & retail | 2025 |
| Romanian Supermarket Ltd | Wholesale & retail | 2026 |
| Romar Group Limited | Hospitality | 2024 |
| Ronell Project Consultancy Ltd | Administrative & support | 2026 |
| Rongan Ltd | Health & social care | 2020 |
| Roofing Performer Ltd | Construction | 2024 |
| Rookie Cooks LLP | | 2024 |
| Rooks Nest Financial Ltd | Financial services | 2025 |
| Roots and Wings Property Ltd | Real estate | 2025 |
| Rophet Limited | Wholesale & retail | 2020 |
| Roqueline Deco & Events Ltd | Hospitality | 2024 |
| Rosa Pro Cleaning Ltd | Administrative & support | 2025 |
| Rosca Prestine Cleaning Solutions Ltd. | Health & social care | 2023 |
| Rose Sons Ltd | Hospitality | 2025 |
| Roseleigh Property Group Limited | Construction | 2024 |