| Red Rose Workwear Limited | Manufacturing | 2018 |
| Red Stag Recruitment Limited | Administrative & support | 2021 |
| Red Tick Accountancy Limited | Professional & scientific | 2011 |
| Redace Limited | Extraterritorial | 2021 |
| Redbird Consultants Limited | Extraterritorial | 2021 |
| Redbird Conveyancing Limited | Professional & scientific | 2010 |
| Redbridge Bury Limited | Financial services | 2008 |
| Redbridge Homes Limited | Extraterritorial | 2026 |
| Redbridge Solutions Limited | Extraterritorial | 2021 |
| Redbrigade Holdings Limited | Extraterritorial | 2021 |
| Redefining Education Ltd | Education | 2021 |
| Redisher Limited | Real estate | 1998 |
| Redriveruk Ltd | Wholesale & retail | 2018 |
| Redvales OFF Licence Limited | Wholesale & retail | 2012 |
| Redwall Group Ltd | Information & communication | 2018 |
| Reel Homes Limited | Real estate | 2023 |
| Reelroutes Ltd | Information & communication | 2026 |
| Refix Limited | Wholesale & retail | 2023 |
| Reframe Recycling (NW) Ltd | Water & waste | 2025 |
| Refresh Dance Company Limited | Education | 2025 |
| Refreshments UK Ltd | Hospitality | 2023 |
| Regency Factors IF Limited | Financial services | 2023 |
| Regency Factors Invoice Finance Limited | Administrative & support | 2000 |
| Regency Factors Limited | Administrative & support | 2000 |
| Regency House Finance Limited | Administrative & support | 1994 |
| Regency Risk Solutions Limited | Financial services | 2014 |
| Regency Trade Finance Limited | Financial services | 1991 |
| Regent Park (Salford) RTM Company Ltd | Households | 2010 |
| Regent Security Force Ltd | Administrative & support | 2023 |
| Rehabilitation Care Limited | Health & social care | 2024 |
| Rehabilitation for Independence Ltd | Health & social care | 2011 |
| Rehan Developers Ltd | Construction | 2024 |
| Rehanmalik Ltd | Wholesale & retail | 2025 |
| Rejuve ME Ltd | Real estate | 2014 |
| Rejuvenate Skincare Ltd | Wholesale & retail | 2021 |
| Reliant Energy Solutions Ltd | Construction | 2024 |
| Reliant Home Solutions Ltd | Administrative & support | 2026 |
| Remediation Solutions Ltd | Extraterritorial | 2025 |
| Remedy Bury Limited | Administrative & support | 2015 |
| Remit Union Limited | Financial services | 2020 |
| Remote Audio Visual Limited | Administrative & support | 2009 |
| Removio Limited | Transport & logistics | 2025 |
| Rena Associates Limited | Extraterritorial | 2021 |
| Rendervor Ltd | Wholesale & retail | 2019 |
| Rennovate Decorating & Spraying Specialist Limited | Construction | 2026 |
| Renobuild NW Limited | Manufacturing | 2025 |
| Renovare Aesthetics Clinic Ltd | Other services | 2025 |
| Rent Reliable Limited | Extraterritorial | 2014 |
| Rental Property Holdings Limited | Real estate | 2021 |
| Reoj Ltd | Real estate | 2026 |
| Repair Assured Ltd | Other services | 2023 |
| Resc Limited | Administrative & support | 2007 |
| Resilient AID and Dialogue Initiative (Radi) | Health & social care | 2020 |
| Resin Flooring Systems Limited | Construction | 2003 |
| RESOLV3 Mediation Ltd | Professional & scientific | 2024 |
| Resolve Employment Disputes Limited | Professional & scientific | 2002 |
| Resonum AI Ltd | Information & communication | 2026 |
| Response Maintenance and Building Solutions Ltd | Construction | 2010 |
| Rest Assured Limited | Financial services | 2019 |
| Retailvote Limited | Other services | 1990 |
| Retrocheck Ltd | Professional & scientific | 2025 |
| Retroecofit Limited | Construction | 2023 |
| Return on Investment Digital Ltd | Information & communication | 2024 |
| Revaive Ltd | Information & communication | 2025 |
| Revalia Ltd | Administrative & support | 2025 |
| Revelation Social Care Ltd | Health & social care | 2015 |
| Revert Clothing Limited | Wholesale & retail | 2018 |
| Reviresco Foods Ltd | Hospitality | 2017 |
| Revolution Motor Spares Ltd | | 2011 |
| Revolve Engineering Ltd | Manufacturing | 2022 |
| Rexaeus Ltd | Transport & logistics | 2019 |
| Rexxi Limited | Extraterritorial | 2024 |
| RG Construction Midlands Limited | Construction | 2017 |
| RG Engineering (NW) Limited | Professional & scientific | 2021 |
| RG Studio (London) Limited | Arts & recreation | 2023 |
| Rgdc Limited | Information & communication | 2015 |
| RGP Structural Engineering Limited | Professional & scientific | 2017 |
| Rhap Limited | Other services | 2019 |
| RHC Services NW Ltd | Wholesale & retail | 2025 |
| Rhino Build (MCR) Ltd | Construction | 2022 |
| Rhino Pips FX Ltd | Education | 2025 |
| Rhna Hand Car Wash Ltd | Administrative & support | 2024 |
| Rhocc Ltd | Real estate | 2018 |
| Rhodian Wealth Management Ltd | Financial services | 2022 |
| Rhyl Foods Limited | Hospitality | 2025 |
| Ribble Valley Autos Ltd | Wholesale & retail | 2024 |
| Rica Ribbean Ltd | Hospitality | 2018 |
| Richard Kenneth (Menswear) Limited | Wholesale & retail | 1971 |
| Richard Lees Decking Limited | Manufacturing | 2012 |
| Richard Lees Steel Decking Limited | Manufacturing | 2012 |
| Riches Dance Studio Ltd | Arts & recreation | 2013 |
| Ricketts Hopkinson Ltd | Real estate | 2020 |
| Ridelife Limited | Arts & recreation | 2010 |
| Rider Hunt Construction Consultants LLP | | 2011 |
| Rider Hunt Group Limited | Professional & scientific | 1989 |
| Ridge Holdings (UK) Limited | Agriculture & fishing | 2013 |
| Ridgewood UK Limited | Administrative & support | 2008 |
| Ridshaw Developments Limited | Construction | 2016 |
| Rigby & Pearson Limited | Construction | 1960 |
| Rigby and Ryan Properties Limited | Real estate | 2017 |