| Roadhogs Recruitment Limited | Administrative & support | 2013 |
| Roam Catering Ltd | Hospitality | 2019 |
| Roam Inns Ltd | Hospitality | 2023 |
| Roaming Dairy Limited | Agriculture & fishing | 2017 |
| Roasted for YOU Limited | Manufacturing | 2026 |
| ROB Beale Limited | Other services | 2000 |
| Robbie Phillips Ecology Ltd | Professional & scientific | 2025 |
| Robert Boyd Limited | Health & social care | 2023 |
| Roberts Building Contractors Limited | Construction | 2009 |
| Robertson Building Contractors Ltd | Construction | 2011 |
| Robertson Warner Limited | Hospitality | 2014 |
| Robinhood Gardening Services Ltd | Administrative & support | 2026 |
| Robinson Equine VET & Dental Surgery Limited | Professional & scientific | 2024 |
| Roca Alta Limited | Agriculture & fishing | 2020 |
| Roche Farms Limited | Professional & scientific | 1979 |
| Rochford Productions Limited | Information & communication | 2006 |
| Rock Architecture Studio Ltd | Professional & scientific | 2022 |
| Rock ERP Consulting Limited | Information & communication | 2016 |
| Rockbourne Motors Limited | Manufacturing | 2014 |
| Rockbourne Properties Limited | Construction | 2025 |
| Rockhaven (Metz Way) Management Company Limited | Real estate | 2017 |
| Rockhaven Park (Swindon) Management Company Limited | Real estate | 2015 |
| Rockhopper Civita Limited | Mining & quarrying | 2000 |
| Rockhopper Croatia Limited | Mining & quarrying | 2015 |
| Rockhopper Exploration (Hydrocarbons) Limited | Mining & quarrying | 2005 |
| Rockhopper Exploration (OIL) Limited | Mining & quarrying | 2005 |
| Rockhopper Exploration (Petrochemicals) Limited | Mining & quarrying | 2005 |
| Rockhopper Exploration PLC | Mining & quarrying | 2004 |
| Rockhopper Mediterranean Limited | Mining & quarrying | 2005 |
| Rockhopper Resources Limited | Mining & quarrying | 1995 |
| Rocky Valley Limited | Hospitality | 2002 |
| Roco Consulting Limited | Professional & scientific | 2025 |
| Rococo of Bath (Holdings) Limited | Real estate | 2025 |
| ROD Cahill Consultancy Limited | Professional & scientific | 2018 |
| Roddy Projects Limited | Wholesale & retail | 2025 |
| Roddys Retreat Limited | Hospitality | 2019 |
| Rodney Residential Limited | Construction | 2024 |
| Roger Twynham Motor Company Limited | Wholesale & retail | 1985 |
| Rogers Garden Services Ltd | Administrative & support | 2024 |
| Rogue Skies Ltd | Wholesale & retail | 2025 |
| Rojake Limited | Hospitality | 2022 |
| Roker Avenue Management Company Ltd | Real estate | 2014 |
| Rolle Gardens (Management Company) Limited | Extraterritorial | 2023 |
| Rollestone Street Holdings Limited | Hospitality | 2023 |
| Rollestone Street Limited | Construction | 2022 |
| Romans Walk Limited | Households | 2010 |
| Rombek Construction Ltd | Construction | 2026 |
| Romney Meadows Management Company Limited | Households | 2022 |
| Romsey Financial Services Limited | Professional & scientific | 2020 |
| Romsey Plaza Barbers Limited | Other services | 2026 |
| Romwy Power Garden Machinery Limited | Wholesale & retail | 1999 |
| Ronald Chesney Productions Limited | Information & communication | 2017 |
| Ronda Collective Ltd | Wholesale & retail | 2023 |
| Rookery Farm Hampshire Limited | Real estate | 2025 |
| Rookery Park Management Company Limited | Households | 2021 |
| Room to LET (Salisbury) Limited | Real estate | 2019 |
| Roomie Rentals Ltd | Real estate | 2025 |
| Root and Wave Ltd | Wholesale & retail | 2025 |
| Rope Access Welding Limited | Construction | 2013 |
| Rors Ltd | Manufacturing | 2013 |
| Rory Haworth Galt Limited | Professional & scientific | 2022 |
| Rosamund Leverett Architects Ltd | Professional & scientific | 2017 |
| Roscarrack Property Limited | Real estate | 2024 |
| Rose Consultancy Aviation Limited | Professional & scientific | 2022 |
| Roseburn Property Management Limited | Extraterritorial | 2013 |
| Rosedale Park Management Company Limited | Households | 2021 |
| Roses of Salisbury Limited | Wholesale & retail | 2003 |
| Rosewood Apartments (Calne) Management Company Limited | Households | 2004 |
| Rosie Etienne Ltd | Wholesale & retail | 2023 |
| Ross House (Ashley Road) Limited | Households | 2009 |
| Rossart Properties Limited | Hospitality | 1995 |
| Rossedge Limited | Financial services | 1963 |
| Rosslyn House Residents Management Ltd | Real estate | 2011 |
| Rotaheat Limited | Manufacturing | 2012 |
| Rotech Services Ltd | Energy | 2017 |
| Rothwell Estates Salisbury Limited | Extraterritorial | 2014 |
| Rotorflush Filters Limited | Administrative & support | 2010 |
| Rottensocks Limited | Extraterritorial | 2010 |
| Roundacre Residents Limited | Real estate | 1990 |
| Roundbear Ltd | Information & communication | 2020 |
| Roundhay Court Management Limited | Households | 2018 |
| Roundhouse Gate (Cringleford) Management Company Limited | Households | 2020 |
| Roundpeg Resourcing Ltd | Administrative & support | 2013 |
| Route 303 Diner Limited | Hospitality | 2017 |
| Rovman Limited | Professional & scientific | 2012 |
| ROW 26 Limited | Hospitality | 2019 |
| Rowan Court (Halstead) Management Company Limited | Households | 2020 |
| Rowan Garden Maintenance Ltd | Administrative & support | 2025 |
| Rowan House (Salisbury) Management Limited | Households | 2002 |
| Rowan House (Verwood) Management Company Limited | Households | 2021 |
| Rowbarrow Development Ltd | Administrative & support | 2014 |
| Rowden Court (Chippenham) Management Company Limited | Real estate | 2014 |
| Rowden Manor Drive (Chippenham) Management Company Limited | Real estate | 2014 |
| Rowden Park Management Company Limited | Households | 2021 |
| Rowe Financial & Insurance Services Limited | Financial services | 2013 |
| ROY Judd Limited | Construction | 2016 |
| Royal Artillery Aero Club Limited(The) | Arts & recreation | 1936 |
| Royal Artillery Museum | Arts & recreation | 1990 |
| Royal Artillery Museums (Enterprises) Limited | Arts & recreation | 1992 |
| Royal Mead Phase 3 Swindon Management Company Limited | Households | 2007 |