| Red Business Systems Limited | Information & communication | 2005 |
| Red E2 Limited | Other services | 1999 |
| Red Glen Estates Limited | Real estate | 2000 |
| Red Horizon Holdings Limited | Construction | 2024 |
| Red Horizons (UK) Limited | Real estate | 2026 |
| Red Horizons SA Limited | Real estate | 2025 |
| Red House I.T. Limited | Professional & scientific | 1999 |
| Red Kite Adventures Ltd | Administrative & support | 2023 |
| Red Kite Travel Ltd | Hospitality | 2021 |
| Red MU Limited | Information & communication | 2011 |
| Red Oak Consulting LLP | | 2005 |
| Red Oak Consulting R&D Ltd | Information & communication | 2024 |
| Red Oak Developments Limited | Construction | 2008 |
| Red OWL Limited | Real estate | 2023 |
| Red Panda Property Ltd | Real estate | 2023 |
| Red Riverbank Communications Limited | Information & communication | 2011 |
| Red Sales People Ltd | Administrative & support | 2023 |
| Red Savannah Ltd | Administrative & support | 2010 |
| Red Sky Foods Ltd | Information & communication | 2020 |
| Red Strategic Consulting Limited | Information & communication | 2015 |
| Redbrook Marketing Limited | Other services | 2018 |
| Redchurch Equity Limited | Real estate | 2014 |
| Redcliffe Management Limited | Households | 2023 |
| Redcroft Construction Ltd | Construction | 2018 |
| Reddings Park Community Ltd | Other services | 2014 |
| Reddings Storage Limited | Transport & logistics | 2021 |
| Redeeming Ltd | Administrative & support | 2026 |
| Redefined Developments Ltd | Construction | 2025 |
| Redefined Living Ltd | Real estate | 2025 |
| Redefined Spaces Ltd | Construction | 2025 |
| Redefining Wealth Limited | Professional & scientific | 2020 |
| Redesdale House Management Limited | Households | 1982 |
| Redford Smith Ltd | Construction | 2018 |
| Redgrove Associates Limited | Administrative & support | 2004 |
| Redgrove Builders Limited | Construction | 2008 |
| Redgrove Park Management Company Limited | Real estate | 1990 |
| Redgrove Plumbing & Heating Ltd | Construction | 2023 |
| Redgrove Scaffolding Ltd | Construction | 2021 |
| Redjuice Liquid Ltd | Manufacturing | 2019 |
| Redjuice Retail Limited | Wholesale & retail | 2014 |
| Redland International Recycling Ltd | Wholesale & retail | 2005 |
| Redland Property Limited | Real estate | 2021 |
| Redmond Marketing and Consulting Limited | Professional & scientific | 2014 |
| Rednats Limited | Information & communication | 2018 |
| Rednaxela Serviced Accommodation Limited | Real estate | 2017 |
| Redpanda Data Emea Limited | Administrative & support | 2021 |
| Redrock IT Limited | Other services | 2007 |
| Redtarn Events Ltd | Professional & scientific | 2026 |
| Redwood Materials UK Limited | Administrative & support | 2021 |
| Reefed Limited | Information & communication | 2013 |
| Reeftech (UK) Limited | Information & communication | 2007 |
| Reejekt Productions Ltd | Information & communication | 2021 |
| Reel Television Ltd | Information & communication | 2006 |
| Reeve Medical Training and Consultancy Limited | Professional & scientific | 2024 |
| Refresh the World Ltd | Wholesale & retail | 2019 |
| Regaby Investments Ltd | Real estate | 2017 |
| Regal Developments (Cotswolds) Ltd | Construction | 2023 |
| Regal House 2015 Management Limited | Households | 2015 |
| Regal House Investments Limited | Real estate | 2006 |
| Regan House Limited | Households | 2007 |
| Regency Airport Cars Limited | Transport & logistics | 2019 |
| Regency Apartments Ltd | Hospitality | 2013 |
| Regency Associates Ltd | Real estate | 2018 |
| Regency Business Consulting Ltd | Professional & scientific | 2025 |
| Regency Chandeliers & Interiors Limited | Wholesale & retail | 2016 |
| Regency Dental Practice (Cheltenham) Limited | Health & social care | 2012 |
| Regency Fire and Security Ltd | Other services | 2018 |
| Regency Health Ltd | Financial services | 2013 |
| Regency House (Cheltenham) Freehold Limited | Households | 2022 |
| Regency JET Ltd | Transport & logistics | 2019 |
| Regency Mews (Cheltenham) NO. 1 Management Limited | Households | 1998 |
| Regency Natural Ltd | Hospitality | 2010 |
| Regency Residential Limited | Households | 2022 |
| Regency Residents Association Limited | Households | 1998 |
| Regency Retreats Ltd | Wholesale & retail | 2020 |
| Regency Settlement Services Ltd | Administrative & support | 2011 |
| Regency Square Cheltenham Limited | Households | 2019 |
| Regency Square Cheltenham RTM Company Limited | Households | 2016 |
| Regent House RTM Company Limited | Households | 2009 |
| Regents Green Cheltenham Ltd | Households | 2022 |
| Regrowth Holdings Limited | Financial services | 2006 |
| Regulationgolf Limited | Wholesale & retail | 2025 |
| Regulus Risk Management Ltd | Professional & scientific | 2024 |
| Reid Electrical Services Limited | Construction | 2020 |
| REINCARN8 Ltd | Information & communication | 2025 |
| Reissler Limited | Wholesale & retail | 2023 |
| Rejuvenateu.Com Ltd | Health & social care | 2024 |
| Rekrmend Ltd | Information & communication | 2012 |
| Relax Mattress Limited | Manufacturing | 2018 |
| Reliance International Limited | Professional & scientific | 2019 |
| Relief Counselling Ltd | Health & social care | 2023 |
| REM Residential Limited | Real estate | 2024 |
| Remico Homes Ltd | Real estate | 2018 |
| Remico Properties Ltd | Construction | 2012 |
| Remote Automotive UK Ltd | Administrative & support | 2023 |
| Remote Possibilities Limited | Administrative & support | 2015 |
| Remploy Pension Scheme Trustees Limited | Administrative & support | 2011 |
| Rendell Heating and Plumbing Limited | Construction | 2019 |
| Rendesco Group Limited | Financial services | 2024 |
| Rendesco Growth Shares Nomineeco Limited | Extraterritorial | 2022 |