| R F Mechanical Ltd | Construction | 2016 |
| R F Upson & SON Limited | Manufacturing | 2015 |
| R FOX Limited | Information & communication | 2024 |
| R G Care Ltd. | Health & social care | 1943 |
| R I M Transport Ltd | Transport & logistics | 2023 |
| R J G Developments Ltd | Real estate | 2018 |
| R J Wicks Ltd | Hospitality | 2019 |
| R K Contracting Services Limited | Construction | 2020 |
| R K DEN Group Ltd | Financial services | 2025 |
| R K DEN Properties Ltd | Real estate | 2025 |
| R K G Turner Limited | Administrative & support | 2017 |
| R L R Motors Limited | Wholesale & retail | 2020 |
| R Moore Consulting Limited | Professional & scientific | 2014 |
| R P Project London Ltd | Construction | 2017 |
| R Reeve Holdings Ltd | Financial services | 2022 |
| R Squared Detailing Limited | Wholesale & retail | 2019 |
| R Thompson Property Limited | Real estate | 2018 |
| R W Hall & Sons Limited | Construction | 2002 |
| R Wong Associates Ltd | Health & social care | 2013 |
| R Wong Ltd | Health & social care | 2025 |
| R Wrinch Limited | Agriculture & fishing | 2009 |
| R&H Management Ltd | Real estate | 2023 |
| R&J [Ipswich] Limited | Administrative & support | 2019 |
| R&N Logistics Ltd | Transport & logistics | 2021 |
| R&R Associates Property Investment Ltd | Administrative & support | 2016 |
| R&S Sahota Properties Ltd | Real estate | 2025 |
| R-Rides Ltd | Transport & logistics | 2021 |
| R-Services Ltd | Wholesale & retail | 2016 |
| R. Bugg Trading Limited | Transport & logistics | 2011 |
| R. E. Wheatley Associates Ltd | Professional & scientific | 2022 |
| R. Jackson (East Anglia) Limited | Real estate | 1946 |
| R.D Cabling Ltd | Other services | 2023 |
| R.E.P Carpentry & Joinery Ltd | Construction | 2020 |
| R.F.E Property Management Ltd | Construction | 2022 |
| R.H Autocare Limited | Wholesale & retail | 2019 |
| R.J.S. Maintenance Services Limited | Administrative & support | 1999 |
| R.J.S. Silo Clean (International) Limited | Administrative & support | 2003 |
| R.P.C Scaffolders Ltd | Construction | 2026 |
| R.S.E.I. Ltd | Construction | 2015 |
| R.S.L Brickwork Ltd | Construction | 2026 |
| R.S.L Construction Ltd | Construction | 2013 |
| R22 Ltd | Information & communication | 2023 |
| R3: Financial Services Group Limited | Financial services | 2001 |
| R3H Developments Limited | Construction | 2018 |
| R98 Ltd | Wholesale & retail | 2026 |
| RAB Property Consultancy Limited | Professional & scientific | 2025 |
| RAB Retail Limited | Professional & scientific | 2005 |
| Rabia Traders Ltd | Wholesale & retail | 2025 |
| Rabpc Holdings Limited | Financial services | 2025 |
| Race Car Consultants Limited | Professional & scientific | 2009 |
| Race Car Developments Limited | Manufacturing | 2019 |
| Race International Ltd | Wholesale & retail | 2023 |
| Rachels Court (Ipswich) 2000 Limited | Households | 1998 |
| Rackhams Auto Body Centre Limited | Wholesale & retail | 2012 |
| Rackstraw & Associates Limited | Professional & scientific | 2009 |
| RAD Signs Ltd | Manufacturing | 2022 |
| Radh Engineering Ltd | Professional & scientific | 2026 |
| Radian Design Limited | Professional & scientific | 2015 |
| Radiantrhythms UK Ltd | Extraterritorial | 2026 |
| Radiantrush Entertainment Ltd | Extraterritorial | 2026 |
| Radiate Limited | Construction | 2003 |
| Radical Lounge Group Ltd | Manufacturing | 2025 |
| Radio Seagull UK Ltd | Information & communication | 2019 |
| Radioma Ltd | Wholesale & retail | 2019 |
| Radius Marketing Solutions Limited | Professional & scientific | 2002 |
| Raedwald Cottages Limited | Hospitality | 2025 |
| Raedwald Trust | Education | 2013 |
| Raeware Data Solutions Ltd | Information & communication | 2021 |
| Raffle and Ride Ltd | Wholesale & retail | 2020 |
| Raffledup Ltd | Wholesale & retail | 2019 |
| Rafpol Ltd | Construction | 2018 |
| RAG Designs Ltd | Professional & scientific | 2021 |
| Ragdoll Developments Ltd | Real estate | 2024 |
| Ragnary Logistics Ltd | Transport & logistics | 2026 |
| Rahman Residential Properties Limited | Real estate | 2023 |
| Raibbi Trans Limited | Transport & logistics | 2023 |
| Raihan Faisal Ltd | Extraterritorial | 2024 |
| Railway Bistro Limited | Hospitality | 2023 |
| Rainbow Pharmacy Ipswich Limited | Wholesale & retail | 2021 |
| Rainbow Rangers Limited | Health & social care | 2016 |
| Rainbow Site Limited | Hospitality | 2023 |
| Rainbowbox Publishing Limited | Administrative & support | 2023 |
| Rainbows Ipswich Limited | Education | 2025 |
| Raisena Yachting Ltd | Real estate | 2025 |
| Raja Khurram Limited | Information & communication | 2025 |
| Raja's Mini Market Ltd | Wholesale & retail | 2006 |
| Rajesh Velusamy UK Limited | Wholesale & retail | 2020 |
| Rajsun Properties Limited | Real estate | 2020 |
| Raju Impex Ltd | Wholesale & retail | 2025 |
| Rakims Ltd | Health & social care | 2022 |
| Rakkus SPV Ltd | Real estate | 2020 |
| Rakrish Properties Ltd | Real estate | 2022 |
| Ralvi Limited | Construction | 2021 |
| RAM Facilities Ltd | Construction | 2019 |
| RAM Landscapes Limited | Administrative & support | 2021 |
| Ramana Media Ltd | Information & communication | 2014 |
| Ramana Properties Limited | Real estate | 2020 |
| Ramanandi Ltd | Hospitality | 2025 |
| Ramsa Transport Ltd | Transport & logistics | 2025 |
| Ramsay Collection Limited | Information & communication | 2021 |