| Ramsey Park Management Limited | Administrative & support | 2002 |
| Ramsey Renovations Limited | Households | 2026 |
| Ramswell Homes Limited | Construction | 2023 |
| Ramunas Transport Limited | Transport & logistics | 2013 |
| RAN Consultancy Limited | Administrative & support | 2022 |
| Rancor Limited | Wholesale & retail | 2018 |
| Rancor One Ltd | Real estate | 2022 |
| Randall Accommodation Ltd | Real estate | 2022 |
| Randall Group Holdings Ltd | Financial services | 2024 |
| Randall Luxe Homes Ltd | Real estate | 2025 |
| Randall Property Group Ltd | Real estate | 2021 |
| Rango Developments Ltd | Real estate | 2019 |
| Ransome's Dock Holding Company Limited | Professional & scientific | 2009 |
| Ransome's Dock Limited | Real estate | 1988 |
| Ransome's Trading Holding Company Limited | Professional & scientific | 2009 |
| Ransome's Trading Limited | Administrative & support | 2007 |
| Ransomes Jacobsen Limited | Manufacturing | 1972 |
| Ransomes Limited | Professional & scientific | 1884 |
| Ransomes Pensions Trustee Company Limited | Financial services | 1966 |
| Ranson Classic Car Parts Limited | Wholesale & retail | 2024 |
| Ranya Store Ipswich Ltd | Wholesale & retail | 2025 |
| Rapid Approach Coaching Ltd | Education | 2020 |
| Rapid Dispatch (Ipswich) Ltd | Transport & logistics | 2024 |
| Rapid Labs Limited | Wholesale & retail | 2008 |
| Rapid Transport Limited | Transport & logistics | 1997 |
| Rare Candy Raffles Ltd | Arts & recreation | 2022 |
| Rareluca.Bg Ltd | Transport & logistics | 2021 |
| Raresh Logistic Ltd | Transport & logistics | 2016 |
| Rascal Video Processing Limited | Information & communication | 2017 |
| Rascals Products Limited | Manufacturing | 2012 |
| Rashid & Begum Ltd | Real estate | 2025 |
| Raspberry HR Ltd | Professional & scientific | 2023 |
| Ratatat Tatts Ltd | Arts & recreation | 2021 |
| Rattlesden Risby Ltd. | Information & communication | 2017 |
| Raul ION Ltd | Transport & logistics | 2018 |
| Raven Sports Limited | Arts & recreation | 2021 |
| Ravenhall Property Ltd | Real estate | 2025 |
| Ravenswood Fish and Chips Ipswich Limited | Hospitality | 2025 |
| Ravenwood Health Limited | Health & social care | 2021 |
| Ravenworthcc Ltd | Education | 2025 |
| Ravishing Beauty Ltd | Other services | 2014 |
| RAW Guru Ltd | Manufacturing | 2025 |
| RAW Property Management Ltd | Construction | 2017 |
| RAW Tech Ltd | Information & communication | 2013 |
| RAW Trails LLP | | 2018 |
| Rawa KR Ltd | Hospitality | 2026 |
| Rawlime Ltd | Information & communication | 2024 |
| Rawna Limited | Other services | 2018 |
| Rawna Property Ltd | Real estate | 2024 |
| Rawrosa Limited | Wholesale & retail | 2026 |
| RAY Maritime Facilities Limited | Administrative & support | 2014 |
| Raydon Village Hall Ltd | Construction | 2021 |
| Raydon Wood Ltd | Administrative & support | 2020 |
| Raymond Property Ltd | Real estate | 2018 |
| Raymond&Co Limited | Households | 2022 |
| Rayo Care Ltd | Administrative & support | 2022 |
| Rayos Enterprise Limited | Wholesale & retail | 2024 |
| Rays Bar Ltd | Hospitality | 2019 |
| RAZ Construct Limited | Construction | 2023 |
| RB Accommodation Ltd | Real estate | 2018 |
| RB Commercial Ltd | Wholesale & retail | 2018 |
| RB Construction (East Anglia) Ltd | Construction | 2022 |
| RB Delivery Ltd | Transport & logistics | 2025 |
| RB Kennedy Ltd | Transport & logistics | 2026 |
| Rbayn Holdings Limited | Wholesale & retail | 2026 |
| RBB Property Solutions Limited | Real estate | 2024 |
| Rbcm Limited | Households | 2019 |
| Rbfadez&Menydreads Ltd | Other services | 2026 |
| RC Environmental Solution Ltd | Construction | 2024 |
| RC Farming Ltd | Agriculture & fishing | 2022 |
| RCL Transport Limited | Transport & logistics | 2021 |
| RD Maintenance Ltd | Administrative & support | 2024 |
| RD3 Creative Limited | Professional & scientific | 2013 |
| RDA Media Ltd | Information & communication | 2017 |
| RDB Home & Build Ltd | Real estate | 2023 |
| RDG Invest Ltd | Information & communication | 2019 |
| RDH Boxing Ltd | Arts & recreation | 2024 |
| RDK Electrical Ltd | Energy | 2015 |
| RDL Property Base - Mortgage & Protection Ltd | Financial services | 2026 |
| RDM East Anglia Limited | Real estate | 2021 |
| RDM Group Limited | Financial services | 2023 |
| RDM Investments Limited | Real estate | 2023 |
| RDP Consulting (Ipswich) Ltd | Professional & scientific | 2001 |
| RDP Probate and Estate Services Ltd | Financial services | 2018 |
| RDS Electrical Solutions Limited | Administrative & support | 2012 |
| Re-Create Social Enterprises Limited | Administrative & support | 2011 |
| Re-Form Sports Fitness Ltd | Other services | 2016 |
| Re-Id Design and Build Ltd | Construction | 2021 |
| Re-Treat Feet Limited | Health & social care | 2024 |
| Reactive Media Ltd | Information & communication | 2023 |
| Reactwebsolutions Ltd | Information & communication | 2023 |
| Read Leisure Limited | Professional & scientific | 1990 |
| Readco Investments Ltd | Construction | 2021 |
| Reader Commercial Limited | Real estate | 1993 |
| Readservices Ltd | Construction | 2024 |
| READY2HIRE Personnel Ltd | Administrative & support | 2024 |
| Reaf CIC | Professional & scientific | 2022 |
| Reaktu Ltd | Information & communication | 2025 |
| Real Transport Ltd | Transport & logistics | 2015 |
| Real Wood Solutions Ltd | Wholesale & retail | 2023 |