| Real Slow Productions Ltd | Information & communication | 2026 |
| Real Wealth Limited | Professional & scientific | 2012 |
| Real World Developments Limited | Real estate | 1985 |
| Real World Travel & Conservation Ltd | Professional & scientific | 1998 |
| Real World Travel Ltd. | Administrative & support | 1997 |
| Reality Management Supplies Limited | Wholesale & retail | 2003 |
| Reality Plus UK Limited | Information & communication | 2017 |
| Really Effective Marketing Ltd | Professional & scientific | 2011 |
| Really Insightful Consultancy Limited | Professional & scientific | 2025 |
| Really Tough Corporation Ltd | Information & communication | 2013 |
| Realspacet Limited | Real estate | 2024 |
| Reasonably Priced Cars Limited | Wholesale & retail | 2018 |
| Reasonproud Limited | Professional & scientific | 2011 |
| Rebecca Coulby Interiors Limited | Professional & scientific | 2012 |
| Rebecca Dickinson Ltd | Other services | 2016 |
| Rebecca Jane Limited | Real estate | 2019 |
| Rebecca Jayne Canine Behaviourist Ltd | Education | 2020 |
| Rebecca Lower Psychological Services Ltd | Health & social care | 2025 |
| Reborn Community CIC | Extraterritorial | 2023 |
| Rebourn Performance Ltd | Health & social care | 2025 |
| Recceit Ltd | Wholesale & retail | 2021 |
| Rechenda Does Marketing Ltd | Professional & scientific | 2022 |
| Reck Holdings Ltd | Financial services | 2025 |
| Reclaimed Building Supplies (Norwich) Limited | Wholesale & retail | 1989 |
| Recoil Engineering Ltd | Professional & scientific | 2016 |
| Recommended Agents Ltd | Information & communication | 2017 |
| Reconvey Ltd | Administrative & support | 2022 |
| Recover Physio Hastings Ltd | Health & social care | 2023 |
| Recover Physio Ltd | Health & social care | 2021 |
| Recover Physiotherapy (Franchise) Limited | Health & social care | 2024 |
| Recover Physiotherapy Ltd | Health & social care | 2014 |
| Recover Physiotherapy Wymondham Ltd | Health & social care | 2026 |
| Recruiter Socials Ltd | Professional & scientific | 2025 |
| Recruiterrater Ltd | Information & communication | 2020 |
| Recruitmentjunky Limited | Other services | 2017 |
| Rectory Retreats Ltd | Hospitality | 2025 |
| Rectory RJ Ltd | Administrative & support | 2023 |
| Recycle for Green Ltd | Water & waste | 2020 |
| Red 5 Networks Limited | Information & communication | 2014 |
| Red Airconditioning Ltd | Construction | 2007 |
| Red Balloon - Norwich | Education | 2006 |
| Red Box Lettings Ltd | Real estate | 2023 |
| Red CAP Lang Limited | Professional & scientific | 2024 |
| Red Charger Digital Limited | Real estate | 2007 |
| Red Development Management Limited | Professional & scientific | 2014 |
| Red DOT Composites Limited | Manufacturing | 2014 |
| Red Dragon Media Limited | Manufacturing | 2010 |
| Red Hall Farm Developments Ltd | Real estate | 2021 |
| Red Hare Publishing Limited | Information & communication | 1994 |
| Red Hare Software Ltd | Information & communication | 2018 |
| Red Hospitality Norwich Limited | Hospitality | 2026 |
| Red House Management Company (Norfolk) Limited | Households | 1983 |
| Red Kestrel Ltd | Other services | 2023 |
| Red Kite Furniture Ltd | Other services | 2021 |
| Red Lion (Kenninghall) Limited | Hospitality | 1998 |
| Red Lion Eaton Ltd | Hospitality | 2017 |
| Red Mist Cricket Limited | Arts & recreation | 2008 |
| Red Monster Creative Ltd | Professional & scientific | 2018 |
| Red MUD Media Limited | Information & communication | 2005 |
| Red Oaks Care Ltd | Health & social care | 2019 |
| Red Paint Films Ltd | Information & communication | 2015 |
| Red PIT Farm Limited | Agriculture & fishing | 1973 |
| Red Planet Games Ltd | Other services | 2024 |
| Red Property Holdings Limited | Professional & scientific | 1999 |
| Red RAW Records Limited | Information & communication | 2004 |
| Red Robin Holdings Limited | Real estate | 2021 |
| Red Rock Street Homes Ltd | Real estate | 2025 |
| Red Sea Cargo Limited | Transport & logistics | 2018 |
| Red Star Lettings Ltd | Real estate | 2012 |
| Red Tails Pet Services Limited | Other services | 2022 |
| Red Travels Ltd | Transport & logistics | 2018 |
| Red Triangle Energy Ltd | Professional & scientific | 2012 |
| Red Vine Solutions Ltd | Information & communication | 2017 |
| Red Wolfe Construction Ltd | Construction | 2024 |
| Redash Associates Limited | Professional & scientific | 2003 |
| Redbridge Carpets Ltd | Wholesale & retail | 2017 |
| Redburr Solutions Limited | Information & communication | 2007 |
| Redco Ltd | Manufacturing | 1982 |
| REDCO42 Projects Ltd | Wholesale & retail | 2025 |
| Reddish Healthcare Limited | Health & social care | 2025 |
| Redditch Masala Limited | Hospitality | 2018 |
| Redefined Collective Limited | Administrative & support | 2026 |
| Redefined Studios Limited | Administrative & support | 2026 |
| Redhall Computing Limited | Administrative & support | 2002 |
| Redhat Artificial Intelligence Ltd | Information & communication | 2011 |
| Redhead Architects Ltd | Professional & scientific | 2019 |
| Redhill Services Limited | Construction | 2009 |
| Rediscovering Carbon Ltd | Manufacturing | 2022 |
| Redlemons Ltd | Real estate | 2003 |
| Redline K9 Security Limited | Transport & logistics | 2026 |
| Redline MOT and Service (Norwich) Ltd | Wholesale & retail | 2015 |
| Redlink Alliance Limited | Professional & scientific | 2012 |
| Redmile London Ltd | Wholesale & retail | 2016 |
| Redmonds Merchandise Limited | Manufacturing | 2023 |
| Redo Kitchens Ltd | Other services | 2017 |
| Redorange Limited | Wholesale & retail | 1982 |
| Redoven Dinning Ltd | Hospitality | 2017 |
| Redrock Asset Services Ltd | Manufacturing | 2026 |
| REDROCK11 Ltd | Construction | 2026 |
| Redshelf Holdings Ltd | Financial services | 2021 |