| Quartz Technical Services Limited | Manufacturing | 1987 |
| Queens Park Court (Hinckley) Limited | Households | 1999 |
| Quest Business Services Holdings Ltd | Administrative & support | 2018 |
| Quorn Estates Limited | Real estate | 1938 |
| Quorndon Brush Decorators Limited | Construction | 2005 |
| R S G Services Limited | Professional & scientific | 2006 |
| R Stratton & Co Ltd. | Wholesale & retail | 1992 |
| R. a. Pegg Limited | Construction | 2006 |
| R. Jones (Insurance Brokers) Ltd | Financial services | 1972 |
| R.D. Jeacock and Sons Limited | Construction | 1979 |
| R.J. Duddle Limited | Wholesale & retail | 2003 |
| R.K. Fuels Limited | Real estate | 2003 |
| R.K.D. Plumbing & Heating Limited | Construction | 2007 |
| Race Course Car Sales (Nottingham) Limited | | 1968 |
| Radcliffe Paper Tubes Limited | Extraterritorial | 1939 |
| Rare Form Studio Ltd | Administrative & support | 2021 |
| Ratcliffe Equestrian Limited | Arts & recreation | 2008 |
| RAV Kruppa Investments Limited | Wholesale & retail | 2003 |
| Ravenstone Enterprises Limited | Construction | 1978 |
| RAY Cole Doors Limited | Manufacturing | 1997 |
| Re-Mail Services Limited | Information & communication | 1999 |
| Readyshed Ltd | Wholesale & retail | 2020 |
| Real World Business Solutions Limited | Professional & scientific | 2001 |
| Red W Investments Limited | Financial services | 2023 |
| Redhall Garage Holdings Limited | Financial services | 2007 |
| Redhall Garage Limited | Wholesale & retail | 2004 |
| Regency Court Burbage Management Company Limited | Households | 1990 |
| Regency Court Management Company Limited | Households | 1997 |
| Renal Technical Services Limited | Health & social care | 2007 |
| Renevo Properties Limited | Real estate | 2021 |
| Replacement Motor Components Ltd | Wholesale & retail | 2004 |
| Repro Security Ltd | Manufacturing | 2007 |
| Research Garage Group Limited | Wholesale & retail | 1971 |
| Research Garage Limited | Professional & scientific | 1958 |
| Restoration UK Limited | Wholesale & retail | 1995 |
| Revolution Global Services Limited | Information & communication | 2007 |
| Reyez (UK) Ltd | Other services | 2007 |
| Rhino Protect Holdings Ltd | Financial services | 2018 |
| Rhino Resource Services Holdings Ltd | Administrative & support | 2018 |
| Richard Bailey Plant & Construction Limited | Construction | 2003 |
| Richard Ward Funeral Services Ltd | Other services | 2006 |
| Rick's Automotive Limited | Wholesale & retail | 2000 |
| Rift Solutions Limited | Professional & scientific | 2002 |
| Riverclip Limited | Wholesale & retail | 2004 |
| RJC Contracts Limited | Construction | 2004 |
| Robin CNC Services Limited | Administrative & support | 2009 |
| Rock & Salt Bistro Ltd | Hospitality | 2026 |
| Roid Limited | Information & communication | 2007 |
| Rok-Max Drilling Tools Ltd | Manufacturing | 2008 |
| Romulus Computer and Video Systems Limited | Information & communication | 1998 |
| Roofspace Solutions Limited | Extraterritorial | 2014 |
| Ross Transport Company Limited | Manufacturing | 2002 |
| Royle Standard Limited | Professional & scientific | 2017 |
| Rps-Retail Project Solutions Ltd | Construction | 2017 |
| RSD Developers Ltd | Construction | 2018 |
| Rsft Limited | Wholesale & retail | 2021 |
| Ruash Limited | Extraterritorial | 2007 |
| Rudra Export Ltd | Wholesale & retail | 2024 |
| Rutland and Belvoir Ltd. | Administrative & support | 2003 |
| RX Medication Ltd | Health & social care | 2013 |
| Ryalls HMB Limited | Professional & scientific | 2002 |
| S a Williamson Carpentry Limited | Construction | 2007 |
| S N Joinery & Construction Limited | Construction | 2003 |
| S Square Marketing Ltd | Manufacturing | 2013 |
| S&S Real Estate Company Limited | Real estate | 2017 |
| S. R. I. Electrical Distributors Limited | Wholesale & retail | 2003 |
| S.R. Parton & Associates Ltd | Health & social care | 2002 |
| S.T Cadhir Ltd | Health & social care | 2023 |
| S.T. Corporation Limited | Professional & scientific | 1991 |
| Saffron Apothecaries (Leicester) Limited | Wholesale & retail | 1976 |
| Saint-Gobain Abrasives Limited | Extraterritorial | 1994 |
| Saint-Gobain Aldwych Limited | Financial services | 2005 |
| Saint-Gobain Construction Products UK Limited | Mining & quarrying | 1962 |
| Saint-Gobain Glass (United Kingdom) Limited | Manufacturing | 1989 |
| Saint-Gobain Glass UK Limited | Extraterritorial | 1997 |
| Saint-Gobain High Performance Solutions UK Limited | Professional & scientific | 1930 |
| Saint-Gobain Industrial Ceramics Limited | Extraterritorial | 1967 |
| Saint-Gobain Isover UK Limited | Manufacturing | 2016 |
| Saint-Gobain Limited | Professional & scientific | 1996 |
| Saint-Gobain PAM UK Limited | Extraterritorial | 1898 |
| Saint-Gobain Pensions Limited | Extraterritorial | 1992 |
| Saint-Gobain Performance Plastics Corby Limited | Extraterritorial | 1987 |
| Saint-Gobain Performance Plastics Rencol Limited | Professional & scientific | 1992 |
| Saint-Gobain Performance Plastics Tygaflor Limited | Extraterritorial | 1976 |
| Saint-Gobain Quartz Limited | Extraterritorial | 1906 |
| Saint-Gobain Roofspace Limited | Extraterritorial | 2014 |
| Saint-Gobain Weber Limited | Extraterritorial | 1990 |
| Salisbury House Limited | Financial services | 1986 |
| Sally Properties Limited | Real estate | 2003 |
| Sambell Engineering Limited | Manufacturing | 1976 |
| Samo Care Service Ltd | Administrative & support | 2023 |
| Samworth Brothers Limited | Manufacturing | 1995 |
| Sandfield Holdings Limited | Financial services | 2015 |
| Sandstone Enterprises Limited | Real estate | 1988 |
| Sapec Industrial Chemicals Limited | Other services | 1995 |
| Sapphire DB Limited | Financial services | 2025 |
| Sapphire EB Limited | Financial services | 2025 |
| Sapphire KD Limited | Financial services | 2025 |
| Sapphire SL Limited | Financial services | 2025 |
| Sarah OST Consulting Limited | Information & communication | 2026 |