| Rmscf Ltd | Manufacturing | 2015 |
| Rmss Installations Ltd | Construction | 2015 |
| RMT Haulage Limited | Transport & logistics | 2019 |
| Rmtd Ltd | Transport & logistics | 2024 |
| RMZ Holdings Ltd | Real estate | 2020 |
| Rmzee Property Ltd | Real estate | 2026 |
| RN GAS Services Ltd | Construction | 2022 |
| RNA Camper Co Ltd | Manufacturing | 2025 |
| RNA Forge Limited | Professional & scientific | 2025 |
| RNB Window Cleaning Ltd | Administrative & support | 2022 |
| Rncx Limited | Real estate | 2024 |
| RNG Cladding Ltd | Construction | 2016 |
| RNK Corporation Ltd | Construction | 2017 |
| RNK Estates Ltd | Real estate | 2022 |
| RNK Handsworth Limited | Real estate | 2015 |
| RNR Surfaces Limited | Construction | 2024 |
| RO & BO Aesthetics Limited | Other services | 2023 |
| RO Minimal Ltd | Wholesale & retail | 2020 |
| Ro-Mai Ltd | Hospitality | 2019 |
| Road Marking Services (Holdings) Limited | Financial services | 2021 |
| Road Marking Services Limited | Construction | 1990 |
| Road Master Driving School Ltd | Education | 2024 |
| Road Runner Tyre Centre Limited | Wholesale & retail | 2016 |
| Road Solutions International Ltd | Construction | 2002 |
| Road Surfacing Group Ltd | Construction | 2025 |
| Road Tankers (Northern) Limited | Manufacturing | 1991 |
| Roadeye Ltd | Information & communication | 2013 |
| Roadhouse Brothers Limited | Manufacturing | 2018 |
| Roadrovers Logistics Ltd | Transport & logistics | 2026 |
| Roadwork Surfacing Limited | | 2009 |
| Roam and Recharge Limited | Manufacturing | 2025 |
| Roam Away Ltd | Information & communication | 2026 |
| Roam Mountains Ltd | Education | 2025 |
| Roam Pizza Limited | Hospitality | 2026 |
| Roamer Logistics UK Ltd | Extraterritorial | 2019 |
| Roast HUT (SY) Ltd | Hospitality | 2022 |
| Roast Ltd | Other services | 2023 |
| ROB Software Limited | Information & communication | 2025 |
| ROB Thompson Urbanism Limited | Professional & scientific | 2019 |
| ROB Walker Sound Ltd | Information & communication | 2024 |
| Robarrier Limited | Construction | 2025 |
| Robboj Property Investments Ltd | Households | 2025 |
| Robby Logistics Limited | Transport & logistics | 2026 |
| Robell Ltd | Wholesale & retail | 2014 |
| Robert Atkins Financial Planning Limited | Financial services | 2016 |
| Robert Blomfield Photography Ltd | Professional & scientific | 2019 |
| Robert Bolt Implants Ltd | Health & social care | 2022 |
| Robert C Stevenson Ltd | Wholesale & retail | 2025 |
| Robert Clark Management Services Limited | Professional & scientific | 1969 |
| Robert F. Storey Limited | Health & social care | 2017 |
| Robert Gladden Ltd | Financial services | 2025 |
| Robert Hogarth Legal Services Limited | Professional & scientific | 2018 |
| Robert Hughes Eyecare Limited | Health & social care | 2015 |
| Robert James Hull Limited | Wholesale & retail | 2020 |
| Robert Kerry Travel Ltd | Administrative & support | 2025 |
| Robert Mcdonagh (Plant Hire) Limited | Administrative & support | 1973 |
| Robert Pinfold Design Ltd | Information & communication | 2017 |
| Robert Rawlings Limited | Energy | 2017 |
| Robert Sorby Limited | Manufacturing | 1997 |
| Robert Stevens Joinery Services Limited | Construction | 2014 |
| Robert Street Freehold Ltd | Households | 2025 |
| Robert's Practice & Efficiency Solutions Limited | Real estate | 2014 |
| Roberts & Burling Roofing Supplies Limited | Extraterritorial | 1991 |
| Roberts & GEE Construction Limited | Construction | 2023 |
| Roberts IT Support Ltd | Information & communication | 2025 |
| Roberts Motor Bodies Limited | Wholesale & retail | 2001 |
| Robertson Training and Assessment Limited | Professional & scientific | 2016 |
| Robian Holdings Ltd | Professional & scientific | 2022 |
| Robin Ashley Architects LLP | | 2004 |
| Robin Brook Day Care Services Ltd | Health & social care | 2023 |
| Robin Hood Consultancy Services Ltd | Financial services | 2025 |
| Robin Talent Ltd | Administrative & support | 2024 |
| Robinhoodinn Limited | Hospitality | 2024 |
| Robins Crest Developments Limited | Real estate | 2004 |
| Robinson & Hanson Limited | Manufacturing | 2002 |
| Robinson Arts and Games Ltd | Information & communication | 2022 |
| Robinson Property Holdings Limited | Real estate | 2018 |
| Robinson Renovations Limited | Real estate | 2022 |
| Robinson Rentals Ltd | Real estate | 2025 |
| Robinson Works Ltd | Construction | 2025 |
| Robinson's Precision Engineering Limited | Manufacturing | 2008 |
| Robinsons Auto Locksmiths Limited | Other services | 2019 |
| Robinsons Hospitality Ltd | Hospitality | 2024 |
| Robocold Limited | Professional & scientific | 2020 |
| Roboss Interiors Ltd | Construction | 2020 |
| Robotics Unite C.I.C. | Professional & scientific | 2020 |
| Roboz Trading Ltd | Wholesale & retail | 2020 |
| Robquant Limited | Professional & scientific | 2023 |
| Robson & Franklin Limited | Professional & scientific | 2013 |
| Robson Bulk & Site Services Limited | Construction | 2020 |
| Robson Group Holdings Limited | Financial services | 2017 |
| Robson Handling Technology Limited | Manufacturing | 1943 |
| Robson Site Services Ltd | Construction | 2016 |
| Robt Bradford Hobbs Savill Limited | Extraterritorial | 1948 |
| Robt. Bradford & Company Limited | Extraterritorial | 1955 |
| Robust Global Services UK Ltd | Information & communication | 2012 |
| Rocassa Limited | Professional & scientific | 2018 |
| Rocca Creative Limited | Professional & scientific | 2001 |
| Rocca Creative Thinking Limited | Information & communication | 2010 |
| Rochdale Commercials Limited | Wholesale & retail | 2021 |