| RAY Groom Computer Consultant Limited | Information & communication | 2002 |
| Raydiance Limited | Other services | 2021 |
| RB Engineering Solutions Limited | Construction | 2018 |
| RC Maintenance Services Ltd | Construction | 2021 |
| RC Well Intervention Ltd | Mining & quarrying | 2023 |
| RC8 Homes Limited | Real estate | 2025 |
| RD Boilers Limited | Construction | 2017 |
| RD Fabricators Limited | Professional & scientific | 2020 |
| RDB Property Ltd | Real estate | 2020 |
| Re-Utilise CIC | Water & waste | 2020 |
| Read's Car Maintenance Limited | Wholesale & retail | 2018 |
| Reaper Bird Control Ltd | Administrative & support | 2025 |
| Rebecca Osborne Studios Ltd | Arts & recreation | 2022 |
| Red Dragon Marine Services Limited | Professional & scientific | 2013 |
| Red Hot Media Limited | Manufacturing | 2004 |
| Red Lion Events Ltd | Administrative & support | 2023 |
| Redburn Executive Search Ltd | Administrative & support | 2025 |
| Redditch 247 Ltd | Arts & recreation | 2024 |
| Redhot Ventures Limited | Hospitality | 2006 |
| Redwalls Care Services Limited | Health & social care | 1963 |
| Reeces Services Limited | Other services | 2025 |
| Reef Avalanche Ltd | Manufacturing | 2026 |
| Refuel at the Station CIC | Hospitality | 2025 |
| Regal Healthcare Holdings Limited | Health & social care | 2010 |
| Regal Healthcare Properties Limited | Health & social care | 2003 |
| Regal Investment (Holdings) Limited | Health & social care | 2008 |
| Regent House Bookkeeping Services Ltd | Professional & scientific | 2025 |
| Regini Properties Ltd | Real estate | 2024 |
| Reincarnate Ltd | Wholesale & retail | 2020 |
| Reliable Building Company (UK) Limited | Construction | 2014 |
| REM Maritime UK Ltd | Transport & logistics | 2024 |
| Renforth Holdings Limited | Financial services | 2024 |
| Repair Doctor E a Ltd | Construction | 2015 |
| Resolve Network Limited | Professional & scientific | 2009 |
| Resourcix Energy Services Limited | Administrative & support | 2012 |
| Reveal the Beauty Clinic Limited | Other services | 2007 |
| Revolution Performance Sportscars Limited | Manufacturing | 2003 |
| Reya Coffee Ltd | Wholesale & retail | 2025 |
| Reydon Garage Services Limited | Wholesale & retail | 2012 |
| Rezelix Holdings Limited | Real estate | 2025 |
| RFP Business Limited | Real estate | 2024 |
| RGK Solutions Ltd | Administrative & support | 2019 |
| Rhcommerce Ltd | Wholesale & retail | 2026 |
| Rhizome Energy Limited | Professional & scientific | 2018 |
| Rhond Limited | Professional & scientific | 2013 |
| Rhystic Study Engineering Ltd | Professional & scientific | 2024 |
| Rich BAW Decor Ltd | Construction | 2018 |
| Richard Murray Commercials Ltd | Transport & logistics | 2004 |
| Richard Narborough House Ltd | Real estate | 2015 |
| Richard Sullivan Limited | Professional & scientific | 2001 |
| Richden Homes Limited | Construction | 2014 |
| Righetti Group Ltd | Construction | 2021 |
| Right Time Counselling Services CIC | Health & social care | 2017 |
| Risdon Beazley Recoveries Limited | Transport & logistics | 2021 |
| Risen Talent Solutions Ltd | Administrative & support | 2025 |
| Rivarose Homes Ltd | Real estate | 2021 |
| Riverside Gorleston Management Co Ltd | Real estate | 2021 |
| RJ Electrical Co. Ltd. | Construction | 1995 |
| Rjjenergy Ltd | Construction | 2018 |
| RJS Electrical Limited | Construction | 2022 |
| RM Property Rentals Limited | Real estate | 2022 |
| Rmam Pipework Ltd | Manufacturing | 2024 |
| RMJ Asset Management Ltd | Real estate | 2023 |
| ROB Naunton Fabrication & Inspection Services Limited | Construction | 2015 |
| Robert Stebbings Loler Services Limited | Construction | 2018 |
| Robin Halwas Limited | Wholesale & retail | 1988 |
| Robotics & Renewables Ltd | Other services | 2017 |
| Robwils Leisure Limited | | 1992 |
| Rockart Associates Ltd | Arts & recreation | 2025 |
| Rodent Property Services Limited | Manufacturing | 2013 |
| Roip Holdings Limited | Real estate | 2024 |
| Rolling Drum Ltd | Administrative & support | 2010 |
| Rolo Camper Hire Limited | Administrative & support | 2017 |
| Romie Rose Aesthetics Ltd | Other services | 2025 |
| Rondor Printing and Business Solutions Ltd | Administrative & support | 2003 |
| Rookery Park Golf Course Company Limited | Arts & recreation | 1906 |
| Rooksbid Properties Ltd | Real estate | 2023 |
| Rooster Worldwide Ltd | Information & communication | 2013 |
| Rose and Co Lettings Ltd | Real estate | 2025 |
| Rotate 2020 Ltd | Professional & scientific | 2025 |
| Roundhouse Way (Yaxham) Management Company Limited | Households | 2023 |
| Rsda Holdings Ltd | Other services | 2024 |
| RTP Carpentry Ltd | Manufacturing | 2025 |
| RTT Leisure Ltd | Arts & recreation | 2020 |
| Ruby Candidates Ltd. | Administrative & support | 2018 |
| Rudy's Cafe Bar & Grill Ltd | Hospitality | 2025 |
| Ruff Stuff Bodycare Ltd | Manufacturing | 2019 |
| Rushmere Boarding Kennels & Cattery Ltd | Other services | 2017 |
| Rushmere Farms (Suffolk) Limited | Agriculture & fishing | 1997 |
| Russell & SON Plumbing & Heating Limited | Construction | 2023 |
| Russet Way (Scratby) Limited | Households | 2026 |
| RWR Renovations Limited | Construction | 2016 |
| RYE Festival of the Sea Limited | Arts & recreation | 2020 |
| S & G GAS Services Limited | Construction | 2011 |
| S & N Family Investments Limited | Real estate | 2026 |
| S C Roofing EA Limited | Construction | 2021 |
| S I Interiors Limited | Construction | 2014 |
| S I Properties East Anglia Ltd | Real estate | 2024 |
| S K Watson Properties Limited | Real estate | 2022 |
| S Martin Builders Limited | Construction | 2017 |