| ROB Spedition Ltd | Other services | 2019 |
| Robert FAY Investments Ltd | Real estate | 2022 |
| Robert Nash Consulting Limited | Information & communication | 2017 |
| Roberts Nationwide Support Services Limited | Administrative & support | 2002 |
| Robinsons Soft Drinks Limited | Manufacturing | 1994 |
| Robson & Wakefield Ltd | Construction | 2017 |
| Robson Aerial Services Limited | Information & communication | 2019 |
| Rocket Lawyer UK Limited | Information & communication | 2012 |
| Rockford Warehouse Ltd | Wholesale & retail | 2023 |
| Rocking UR Teens CIC | Administrative & support | 2015 |
| Rocko Construction Limited | Construction | 2020 |
| Rocksolid Services Ltd | Construction | 2021 |
| Rocktype Ltd | Professional & scientific | 2013 |
| Rockwood Landscapes Limited | Administrative & support | 2011 |
| Rocs Brands Limited | Wholesale & retail | 2022 |
| Roderick Wilson Tree Surgery Limited | Agriculture & fishing | 2016 |
| Rodrigo Property Limited | Real estate | 2025 |
| ROE Commercial Management Services Ltd | Professional & scientific | 2018 |
| ROE Wood Park Management Company Limited | Households | 2024 |
| Roedean House RTM Company Limited | Households | 2025 |
| Rogglen Flat Management Company Limited | Households | 1978 |
| Roial Cargo & Delivery Ltd | Transport & logistics | 2020 |
| Rolaar Limited | Manufacturing | 2019 |
| Roller Racking Ltd | Wholesale & retail | 2018 |
| Roman Farm Limited | Households | 2007 |
| Roman Roofing Services Limited | Construction | 2025 |
| Roman Walk Residents Limited | Households | 2016 |
| Romania Build Limited | Construction | 2016 |
| Romarz Enterprise Ltd | Wholesale & retail | 2020 |
| Romasz Construction II Limited | Construction | 2024 |
| Romeologistics Limited | Transport & logistics | 2018 |
| RON Walker Associates Limited | Wholesale & retail | 1999 |
| Rona London Properties Limited | Real estate | 2018 |
| Roof TG Africa Middle East Limited | Construction | 2019 |
| Rookley Freehold Limited | Administrative & support | 2012 |
| Rookley Hold Limited | Administrative & support | 2012 |
| Room for Homeless Ltd | Real estate | 2022 |
| Rooms for Homeless Ltd | Real estate | 2020 |
| Rooted Rays Ltd | Professional & scientific | 2025 |
| Roots Education Limited | Education | 2026 |
| Roots for Success Limited | Professional & scientific | 2004 |
| Rora Movie Construction Ltd | Construction | 2025 |
| Rosaestheticsuk Academy Ltd | Education | 2024 |
| Rosaestheticsuk Ltd | Health & social care | 2023 |
| Rose Garden Builders Ltd | Construction | 2023 |
| Rose Garden Cleaning Limited | Administrative & support | 2023 |
| Rose Garden Garage Ltd | Wholesale & retail | 2023 |
| Rose Garden Gardening Limited | Administrative & support | 2023 |
| Rosebery Rheumatology Ltd | Health & social care | 2025 |
| Rosebuds Majestic Cats Ltd | Manufacturing | 2019 |
| Rosemount Landscapes Ltd | Construction | 2023 |
| Ross Demolition Limited | Construction | 2003 |
| Ross PSG Ltd | Construction | 2025 |
| Rossgate Supermarket Limited | Hospitality | 2003 |
| Rossi Property Ltd | Real estate | 2021 |
| Rotor Creative Limited | Other services | 2017 |
| Rough Stuff Limited | Professional & scientific | 2011 |
| Roughdown Films Limited | Information & communication | 2014 |
| Roverlands Limited | Wholesale & retail | 2019 |
| ROW London Constrruction Ltd | Construction | 2026 |
| Rowan & Bennett Limited | Construction | 2023 |
| Rowan Holdings Limited | Real estate | 2021 |
| Rowan Trading Limited | Health & social care | 1986 |
| Rowans Management Company Limited | Households | 1982 |
| Rowe Communal Cleaning Ltd | Administrative & support | 2019 |
| Rowledge Driving School Ltd | Education | 2025 |
| ROX Construction and Developments Ltd | Construction | 2021 |
| ROX Construction Limited | Construction | 2003 |
| Roxa Homes Ltd | Real estate | 2026 |
| Rraafi Limited | Other services | 2018 |
| Rrdk Limited | Professional & scientific | 2013 |
| RS Retail Hub Ltd | Wholesale & retail | 2025 |
| RSC International Ltd | Information & communication | 2026 |
| Rscj Ltd | Real estate | 2024 |
| Rsgc Property Investments Limited | Real estate | 2019 |
| Rsli Limited | Professional & scientific | 2021 |
| RT Facts Limited | Professional & scientific | 1993 |
| Rtjh Electrical Ltd | Construction | 2021 |
| RTR Electrical Ltd | Construction | 2024 |
| Rubix Therapy Ltd | Health & social care | 2021 |
| Rudraks Services Ltd | Other services | 2011 |
| Ruff Wood Corporate Limited | Other services | 2017 |
| Ruff Wood Pizza Company Limited | Hospitality | 2013 |
| Rujae Limited | Administrative & support | 2017 |
| Rupa's Automotives Limited | Wholesale & retail | 2010 |
| Ruperts Logistics Limited | Transport & logistics | 2015 |
| Ruperts Trousers Limited | Administrative & support | 2005 |
| Rush TM (Properties) Ltd | Extraterritorial | 2023 |
| Rush TM Ltd | Transport & logistics | 2022 |
| Rushton Electrical Services Limited | Construction | 2021 |
| Russell Place Freehold Limited | Households | 2021 |
| Ruth Adams Administrative Services Limited | Administrative & support | 2024 |
| Rutile Limited | Wholesale & retail | 2022 |
| Ruya Cafe Ltd | Hospitality | 2025 |
| RV. Building Services Ltd | Manufacturing | 2022 |
| RVL Services Ltd | Administrative & support | 2016 |
| Ryan Searle Ltd | Information & communication | 2020 |
| Ryandy Ltd | Construction | 2023 |
| Ryans Housing Ltd | Real estate | 2019 |
| Ryarsh Park Management Company Limited | Households | 2015 |