| Recruitment Andreea Cleaning Services Ltd | Administrative & support | 2022 |
| Recruitment Services Central Limited | Administrative & support | 2016 |
| Rectitude Construction Ltd | Construction | 2019 |
| Rectory Close Management Yorkshire Ltd | Real estate | 2023 |
| Recultured HE Ltd | Education | 2025 |
| Recyclemeup Limited | Administrative & support | 2021 |
| Red Monkey Developments Limited | Construction | 2016 |
| Red & Mountain Ltd | Professional & scientific | 2017 |
| Red Admiral Holdings Ltd | Real estate | 2025 |
| Red Admiral Security Services Limited | Administrative & support | 2020 |
| Red and Greens Food Ltd | Manufacturing | 2019 |
| Red Asset Holdings Limited | Administrative & support | 2018 |
| Red Bean Coffee Group Limited | Wholesale & retail | 2017 |
| Red Bear Networks Limited | Professional & scientific | 2021 |
| Red Block Leeds Limited | Real estate | 2021 |
| Red Brick Lets Ltd | Real estate | 2021 |
| Red Brick Mortgages Limited | Financial services | 2019 |
| Red Brick North Property Holdings Limited | Construction | 2026 |
| Red BUG (Holdings) Limited | Financial services | 2025 |
| Red Bullet Creative Limited | Professional & scientific | 2012 |
| Red Bullet Limited | Professional & scientific | 2025 |
| Red Button Holdings Ltd | Financial services | 2017 |
| Red Cactus Advertising Limited | Professional & scientific | 1998 |
| Red Cat Business Solutions Ltd | Administrative & support | 2024 |
| Red Chillies (Leeds) Ltd | Hospitality | 2019 |
| Red Clay Tour PTY Ltd | Wholesale & retail | 2026 |
| Red Couch (Leeds 1) Limited | Construction | 2017 |
| Red Deer Park Ltd | Hospitality | 2020 |
| Red Dexter Limited | Health & social care | 2019 |
| Red Door Leeds Limited | Real estate | 2019 |
| Red Elephant HR Limited | Professional & scientific | 2010 |
| Red Hall Enterprises Limited | Financial services | 2022 |
| Red Hall Investments Ltd | Real estate | 2020 |
| Red HEN Originals Limited | Wholesale & retail | 2013 |
| Red Herring Games Ltd | Manufacturing | 2011 |
| Red Hot 888 Ltd | Hospitality | 2021 |
| Red International Resourcing Ltd | Administrative & support | 2006 |
| Red IS the New Black Ltd | Professional & scientific | 2018 |
| Red JET Properties Limited | Real estate | 2019 |
| Red Kite Aerials Ltd | Information & communication | 2023 |
| Red Kite Corporate Advisory Limited | Professional & scientific | 2024 |
| Red Kite Industries Limited | Manufacturing | 2020 |
| Red Kite Retail Solutions Limited | Professional & scientific | 2019 |
| Red Kite Yorkshire Ltd | Real estate | 2022 |
| Red Kiwii Ltd | Wholesale & retail | 2022 |
| Red Ladder Management Limited | Professional & scientific | 2016 |
| Red Ladder Theatre Company Limited(The) | Arts & recreation | 1976 |
| Red Light Networks Ltd | Information & communication | 2018 |
| Red Lion at Shadwell Limited | Hospitality | 2019 |
| Red Meet Event Services Ltd | Administrative & support | 2016 |
| Red Oak Tree Limited | Construction | 2016 |
| Red Oven Ltd | Hospitality | 2025 |
| Red Quokka Ltd | Information & communication | 2016 |
| Red Roofs Management Company Limited | Real estate | 2012 |
| Red Sea Cleaning Service Ltd | Administrative & support | 2026 |
| Red Slate Developments Limited | Real estate | 2013 |
| Red Slate Properties Ltd | Real estate | 2020 |
| Red Star Stays Ltd | Real estate | 2026 |
| Red Tattoo Leeds Ltd | Other services | 2018 |
| Red Tomato (Doncaster) Limited | Hospitality | 2016 |
| Red Tree Landscapes Ltd | Agriculture & fishing | 2011 |
| Red Truck Ltd | Information & communication | 2015 |
| Red Van Automotive Ltd | Wholesale & retail | 2025 |
| Red Wokk Limited | Hospitality | 2025 |
| Red-Sea Multi-Media Limited | Manufacturing | 2019 |
| RED1990 Ltd | Transport & logistics | 2020 |
| RED3 Marketing Limited | Professional & scientific | 2023 |
| RED4BED Ltd | Wholesale & retail | 2025 |
| RED8 Commercial Limited | Construction | 2016 |
| RED8 Residential Limited | Other services | 2019 |
| Redbarn Information Security Ltd | Information & communication | 2019 |
| Redbeck Motel Limited | Hospitality | 1985 |
| Redbobble Arts Ltd | Arts & recreation | 2016 |
| Redbox Systems Limited | Extraterritorial | 2022 |
| Redbox Worldwide Limited | Information & communication | 2024 |
| Redbrick Projects Ltd | Real estate | 2020 |
| Redbrick Properties (Leeds) Limited | Real estate | 2002 |
| Redcar and Cleveland Lighting Services Limited | Administrative & support | 2005 |
| Redcell 68 Ltd | Administrative & support | 2019 |
| Redcountdown Ltd | Wholesale & retail | 2025 |
| Redcourt RTM Company Ltd. | Households | 2025 |
| Redd Brick Construction Ltd | Administrative & support | 2026 |
| Redd Brick Recruitment Ltd | Administrative & support | 2020 |
| Redder Marketing Limited | Professional & scientific | 2013 |
| Reddish Electrical Company Limited | Manufacturing | 2018 |
| Rededit Limited | Administrative & support | 2016 |
| Redefined Business Supplies Ltd | Administrative & support | 2016 |
| Redefined Furniture Ltd | Administrative & support | 2016 |
| Redefined Group Ltd | Administrative & support | 2016 |
| Redefined Interiors Ltd | Administrative & support | 2017 |
| Redellis (Ware) Ltd | Real estate | 2020 |
| Redfish Emea Asia Ltd | Administrative & support | 2023 |
| Redford Hearth Associates Limited | Professional & scientific | 2014 |
| Redfox Development Consultancy Ltd | Real estate | 2025 |
| Redge Properties Ltd | Real estate | 2021 |
| Redgrave Print & Graphical Services Limited | Manufacturing | 2014 |
| Redhall Healthcare Investment Group Ltd | Financial services | 2022 |
| Redhall Solutions Limited | Professional & scientific | 2019 |
| Redhead Hire Ltd | Administrative & support | 2023 |
| Redhill Flat Roofing Limited | Construction | 2018 |