| Rockstar Prop 4 Limited | Real estate | 2021 |
| Rockstar Prop 5 Limited | Real estate | 2020 |
| Rockstar Prop 6 Limited | Real estate | 2020 |
| Rockstar Prop 8 Limited | Real estate | 2021 |
| Rockstar Prop 9 Limited | Real estate | 2021 |
| Rockstar Property Academy Ltd | Real estate | 2016 |
| Rockstar Property Holdings Ltd | Real estate | 2020 |
| Rockt Limited | Construction | 2026 |
| Rocky Security Services Ltd | Administrative & support | 2021 |
| Roco Site Services Limited | Other services | 2014 |
| Rocpol Limited | Wholesale & retail | 2022 |
| Rode Property Ltd | Real estate | 2025 |
| Rodeo Fitness UK Ltd | Arts & recreation | 2025 |
| Rodeo Group Limited | Information & communication | 2022 |
| Rodex Ltd | Wholesale & retail | 2025 |
| Rodija Properties Ltd | Real estate | 2021 |
| Roding Homes Limited | Real estate | 2019 |
| Roding Lane Homes Ltd | Real estate | 2019 |
| Roding Real Estates Ltd | Real estate | 2019 |
| Rogerdan & Pearlygate Music Ltd | Arts & recreation | 2015 |
| Rogers Corporate Kitchen Ltd | Hospitality | 2024 |
| Rohaan&A Limited | Wholesale & retail | 2026 |
| Rohan Linens Limited | Wholesale & retail | 2024 |
| Rohanraj Limited | Extraterritorial | 2009 |
| Rohdan Construction Limited | Construction | 2022 |
| Rohit Dhawan PVT. Ltd | Health & social care | 2022 |
| Rohit KS Patel Limited | Health & social care | 2022 |
| Rohit's Kitchen Ltd | Hospitality | 2018 |
| ROI Consultancy Limited | Professional & scientific | 2019 |
| Roit Ltd | Administrative & support | 2024 |
| Roiyage Ltd | Wholesale & retail | 2023 |
| Roka Homes Limited | Real estate | 2023 |
| Rolan Consultancy Ltd | Information & communication | 2019 |
| Rolandsrefurbishment. Ltd | Construction | 2013 |
| Rolas Employment Ltd | Administrative & support | 2020 |
| Rolasjoinery Limited | Construction | 2017 |
| Rolive Consulting Ltd | Health & social care | 2020 |
| Rollande Elite Event Decor Limited | Arts & recreation | 2016 |
| Rolling Roast Limited | Hospitality | 2025 |
| Rollon Technologies Ltd | Wholesale & retail | 2026 |
| ROM Transimpex Ltd | Construction | 2020 |
| Roma Properties (London) Limited | Real estate | 2021 |
| Romad Limited | Transport & logistics | 2016 |
| Roman Hucknall Limited | Real estate | 2017 |
| Romanhalls Limited | Construction | 2022 |
| Romania Construct Ltd | Construction | 2022 |
| Romanian Food Shop Limited | Wholesale & retail | 2011 |
| Romanian Grocers Limited | Wholesale & retail | 2013 |
| Rombritanica Limited | Administrative & support | 2025 |
| Romeo Bravo Trading Ltd | Wholesale & retail | 2024 |
| Romero Albanese Ltd | Financial services | 2024 |
| Romford Carpets Ltd | Wholesale & retail | 2020 |
| Romford Foods Limited | Real estate | 2022 |
| Romford Forge Ltd | Construction | 2024 |
| Romford Gift Centre Limited | Wholesale & retail | 1977 |
| Romford Halal Food Ltd | Hospitality | 2026 |
| Romford Investments Ltd | Real estate | 2024 |
| Romford Mazda Limited | Extraterritorial | 2011 |
| Romford Properties Ltd | Real estate | 2009 |
| Romford Proprietas Ltd | Real estate | 2026 |
| Romford Road Property Ltd | Real estate | 2018 |
| Romford Traders Ltd | Other services | 2026 |
| Romit Holdings Ltd | Real estate | 2024 |
| Romulis Roofing Limited | Construction | 2023 |
| RON ETA Logistics Services Limited | Transport & logistics | 2020 |
| Ronak Solutions Ltd | Information & communication | 2026 |
| Ronan HR Ltd | Administrative & support | 2023 |
| Roney Builders Ltd | Construction | 2026 |
| Ronor Joinery Limited | | 1984 |
| Rontop Inhealth Ltd | Health & social care | 2016 |
| Rony Zaman Ltd | Information & communication | 2023 |
| Ronzie Ltd | Wholesale & retail | 2023 |
| Roof Holdings Ltd | Real estate | 2025 |
| Roof Line Construction Ltd | Construction | 2024 |
| Roof Right Solutions Ltd | Construction | 2026 |
| Roohi Distributors Ltd | Wholesale & retail | 2023 |
| Room & Board London Ltd | Hospitality | 2017 |
| Room Board Ltd | Hospitality | 2017 |
| Room Location Ltd | Real estate | 2015 |
| Roomcity Limited | Extraterritorial | 2013 |
| Roopra Construction Limited | Construction | 2002 |
| Roopra Holdings Limited | Real estate | 2019 |
| Roosters Modern Kitchen Ltd | Hospitality | 2023 |
| Root Cause Global Ltd | Professional & scientific | 2022 |
| Root Republic Ltd | Wholesale & retail | 2026 |
| Rootedpassage Limited | Administrative & support | 2026 |
| Rootspace Properties Ltd | Real estate | 2025 |
| Roozbeh International Associates Ltd | Wholesale & retail | 2015 |
| Roozing Limited | Construction | 2021 |
| Rorey Consultancy Limited | Professional & scientific | 2024 |
| Rorey Developments Limited | Real estate | 2024 |
| Rosanna & Co. CIC | Hospitality | 2022 |
| Rosavelt Ltd | Wholesale & retail | 2012 |
| Roscriss Ltd | Transport & logistics | 2022 |
| Rose Gold Property Developers Ltd | Construction | 2025 |
| Rose Gold Real Estate Ltd | Real estate | 2026 |
| Rose Healthcare Limited | Wholesale & retail | 2005 |
| Rose One Enterprises Limited | Other services | 2022 |
| Rose Willow Limited | Wholesale & retail | 2014 |
| Rosebery Services Ltd | Transport & logistics | 2026 |