| Rock London Security Ltd | Administrative & support | 2020 |
| Rock Mortgages Limited | Financial services | 2021 |
| Rock Paper Scissors (Norfolk) Ltd | Other services | 2017 |
| Rock Punk Limited | Arts & recreation | 2024 |
| Rock Solid Graphics Limited | Administrative & support | 2010 |
| Rocket Joe's Pizza Ltd | Hospitality | 2019 |
| Rocknroller Baby Ltd | Manufacturing | 2011 |
| Rockpoint Productions Ltd | Manufacturing | 2018 |
| Rocks and Frocks Limited | Professional & scientific | 2015 |
| Rockspet Limited | Construction | 2018 |
| Rockthorn Asset Finance Limited | Financial services | 2025 |
| Rockthorn Holdings Limited | Financial services | 2025 |
| Rockthorn Ltd | Administrative & support | 2021 |
| Rockwater GS Limited | Other services | 2023 |
| Rockwater Property Limited | Other services | 2013 |
| Rockwealth (Norwich) Ltd | Professional & scientific | 2019 |
| Rockwood Farm Limited | Construction | 2014 |
| Rockwood Park Limited | Construction | 2014 |
| Rococo Painters Limited | Construction | 2017 |
| Rocolec Limited | Manufacturing | 2002 |
| Roderick Richardson Limited | Wholesale & retail | 2015 |
| Rodez Holdings Limited | Financial services | 2025 |
| Rodgers Fenestration Limited | Professional & scientific | 2025 |
| Rodroj Coffee Lounge & Restaurant Ltd | Hospitality | 2013 |
| Rodroj Fish and Chips Limited | Hospitality | 2014 |
| Rodroj Food Store 2 Ltd | Wholesale & retail | 2014 |
| Rodtech UK Limited | Administrative & support | 2010 |
| Rodway Carpentry & Joinery Limited | Construction | 2013 |
| Roes Cottages Ltd | Real estate | 2025 |
| Roflo Ltd | Wholesale & retail | 2022 |
| Roger Adcock Architectural Design Ltd | Professional & scientific | 2015 |
| Roger Bradbury Limited | Wholesale & retail | 1978 |
| Roger Smith & Co. Limited | Real estate | 1977 |
| Rogers & Norton Limited | Professional & scientific | 2012 |
| Rogers Farm Ltd | Agriculture & fishing | 1990 |
| Rogers Home Builders Ltd | Construction | 2015 |
| Rogers Real Estate Ltd | Real estate | 2019 |
| Rogue Cricket Ltd | Manufacturing | 2026 |
| Rogues Media Ltd | Other services | 2012 |
| Roheart Clothing Ltd | Wholesale & retail | 2026 |
| Rohilla Limited | Health & social care | 2014 |
| Rojwise Travel Ltd | Transport & logistics | 2026 |
| ROK Consulting Engineers Ltd | Professional & scientific | 2026 |
| Rokeles Green Residents Management Company Limited | Households | 2022 |
| Roksteady Construction Ltd | Construction | 2014 |
| Rola Aviation Limited | Transport & logistics | 2016 |
| Rola-Trac Ltd | Professional & scientific | 2004 |
| Roland Chapman Electrical Limited | Construction | 2003 |
| Rolfe Street Breakers Ltd | Wholesale & retail | 2018 |
| Roll Marketing Ltd | Information & communication | 2021 |
| Rolladoor Ltd | Wholesale & retail | 2015 |
| Rollerdor Limited | Manufacturing | 2017 |
| Rollertek Ltd | Wholesale & retail | 2008 |
| Rollings Electrical Limited | Construction | 2019 |
| Rolls Aquisitions Limited | Construction | 2026 |
| Rolls Property Services Ltd. | Construction | 2011 |
| Rollsec Limited | Professional & scientific | 2016 |
| Roly 2021 Limited | Hospitality | 2022 |
| Roma 13 Ltd | Hospitality | 2005 |
| Roma Engineering Ltd | Professional & scientific | 2025 |
| Roman Willow Limited | Administrative & support | 2020 |
| Romeo Alpha Juliet Limited | Manufacturing | 2025 |
| Romeo Pizza Selly Oak Ltd | Hospitality | 2018 |
| Romeo&Malachi Limited | Health & social care | 2022 |
| Rommelle Limited | Professional & scientific | 2021 |
| RON Bullock Building Contractors Limited | Construction | 2006 |
| Ronald Frank Limited | Real estate | 2020 |
| Ronaldo Ices Limited | Manufacturing | 2002 |
| Ronaldsons Family Law Ltd | Professional & scientific | 2014 |
| Rongbient Biosciences Limited | Agriculture & fishing | 2025 |
| Ronjon Ltd | Real estate | 2021 |
| Ronnie's Rarities Ltd | Wholesale & retail | 2026 |
| ROO Visual Ltd | Professional & scientific | 2023 |
| Roobarb Kids Limited | Wholesale & retail | 2017 |
| Rooby Software Ltd | Information & communication | 2026 |
| Roof Boost Limited | Information & communication | 2025 |
| Roofe Catering Butchers Ltd | Wholesale & retail | 2018 |
| Roofglaze Limited | Construction | 2001 |
| Roofing SW Limited | Construction | 2024 |
| Roofwise (Rainscreens) Ltd | Construction | 2015 |
| Roohoo Consulting Limited | Information & communication | 2017 |
| Rookery Farm (Walcott) Limited | Agriculture & fishing | 1998 |
| Rookery Real Estate Ltd | Real estate | 2024 |
| Room Hub Norwich Ltd | Households | 2026 |
| Roomfoss Control Systems Limited | Manufacturing | 2007 |
| Roomfoss Limited | Professional & scientific | 1982 |
| Rooms & Co Ltd | Real estate | 2013 |
| Rooms at the Rosebery Ltd | Hospitality | 2021 |
| Roost Norfolk Ltd | Real estate | 2026 |
| Root and Balance Ltd | Health & social care | 2021 |
| Root Cafe Ltd | Hospitality | 2025 |
| Root Home Product Ltd | Manufacturing | 2013 |
| Root K Ltd. | Professional & scientific | 2019 |
| Root Norwich Ltd | Other services | 2021 |
| Rootech Services Ltd | Professional & scientific | 2014 |
| Rooted in Nature CIC | Education | 2017 |
| Rooted Solutions Arboriculture Ltd | Professional & scientific | 2024 |
| Roots Agri Limited | Agriculture & fishing | 2024 |
| Roots Salon Limited | Other services | 2025 |
| Roots SMP Norfolk Ltd | Arts & recreation | 2026 |