| Renaturing CIC | Education | 2022 |
| Rendezvous Coffee Shop Limited | Hospitality | 2008 |
| Rendlesham Business Park Ltd | Real estate | 2019 |
| Rendlesham Park Estate Limited | Administrative & support | 1983 |
| Rendo Bakery Ltd | Hospitality | 2026 |
| Reset & Chill Limited | Manufacturing | 2020 |
| Resides Suffolk Ltd | Real estate | 2023 |
| Resolve Fitness Limited | Arts & recreation | 2021 |
| Ress Racing Ltd | Manufacturing | 2025 |
| Rethink Finance Ltd | Professional & scientific | 2020 |
| Revival Blue Felixstowe Ltd | Administrative & support | 2016 |
| Revive IT Limited | Construction | 2006 |
| Reworx Projects Ltd | Construction | 2026 |
| RG Landscape & Construction Ltd | Administrative & support | 2002 |
| Ribs and Powerboats Ltd | Wholesale & retail | 2024 |
| Rich Image Limited | Arts & recreation | 2014 |
| Richard Anthony Rush Antiques Limited | Wholesale & retail | 2014 |
| Richard Bacon Associates Limited | Professional & scientific | 2003 |
| Richard Western Limited | Manufacturing | 1977 |
| Ricky Scott Ltd | Professional & scientific | 2014 |
| Riding for the Disabled (Woodbridge & District Group) | Administrative & support | 2007 |
| Ridorbid Ltd | Extraterritorial | 2011 |
| Riduna Holdings Limited | Construction | 1962 |
| Riduna Park Holdings Limited | Financial services | 2026 |
| Rieger Research Limited | Professional & scientific | 2011 |
| Right Music Limited | Administrative & support | 2001 |
| Ripco Holdings Limited | Hospitality | 2023 |
| Risdale Removals Ltd | Transport & logistics | 2002 |
| Rising Minds CIC | Professional & scientific | 2013 |
| Riskpal Limited | Information & communication | 2017 |
| River Cruise Restaurants Limited | Hospitality | 2017 |
| Riverdale Assets Commercial Limited | Real estate | 2013 |
| Riverdale Projects Limited | Construction | 1999 |
| Riverside (Hacheston) Management Company Limited | Households | 2022 |
| Riverside Engineering (Suffolk) Limited | Manufacturing | 2002 |
| Riverside Restaurant & Theatre Limited | Hospitality | 2000 |
| Riverview Gardening Limited | Administrative & support | 2025 |
| RJB Media Limited | Information & communication | 2009 |
| RJL Contractors Ltd | Wholesale & retail | 2026 |
| RJR Farming Limited | Agriculture & fishing | 2019 |
| RJT Groundcare Ltd | Administrative & support | 2024 |
| RJZ Consulting Ltd | Professional & scientific | 2025 |
| Rlcuts Ltd | Other services | 2025 |
| Rlph Woodbridge Ltd | Hospitality | 2025 |
| Roadcraft Driving School Limited | Education | 2002 |
| Roadii Ltd. | Manufacturing | 2012 |
| ROB Binns Media Ltd | Professional & scientific | 2024 |
| ROB Wegman Process Consultant Limited | Hospitality | 2013 |
| Robert Douglas Hair Workshop Ltd | Other services | 2016 |
| Robert Joyce Golf Professional Limited | Wholesale & retail | 2003 |
| Rockbay Capital Ltd | Financial services | 2019 |
| Rocks Films Ltd | Arts & recreation | 2019 |
| Rococo Property JB Limited | Manufacturing | 2023 |
| Rococo Property Ltd | Real estate | 1995 |
| Rodney Weller Holdings Limited | Real estate | 2018 |
| Roger Gladwell Landscaping and Construction Ltd | Construction | 2023 |
| Rokker Consulting Ltd | Professional & scientific | 2015 |
| Rokker Limited | Professional & scientific | 2015 |
| Roland Group Holdings Limited | Financial services | 2020 |
| Roland Plastics Limited | Manufacturing | 1985 |
| Roly Poly Play CIC | Arts & recreation | 2025 |
| Roofing Direct (Midlands) Ltd Ltd | Administrative & support | 2005 |
| Ropack Ltd | Real estate | 2023 |
| Ropeth | Other services | 2018 |
| Rosa June Limited | Real estate | 2016 |
| Rose and Damien's Cleaning and Pet Services Limited | Administrative & support | 2020 |
| Rose and Myers Ltd | Hospitality | 2025 |
| Rose Grace Capital Limited | Real estate | 2016 |
| Rosery Cottage Properties Ltd | Real estate | 2019 |
| Ross Russell Limited | Financial services | 2004 |
| Roxwell Management Limited | Administrative & support | 2010 |
| RSW Digital Trading Ltd | Information & communication | 2025 |
| Rube Technologies Ltd | Information & communication | 2017 |
| Rubicon PAY Ltd | Administrative & support | 2015 |
| Ruby & the Angel Ltd | Administrative & support | 2016 |
| Ruby Tyger Limited | Wholesale & retail | 2016 |
| Rudland Osteopathy Ltd | Health & social care | 2023 |
| Rumraesh Rentals Ltd | Real estate | 2026 |
| Rural Water Technology Ltd | Professional & scientific | 2021 |
| Rustic Stone Signs & Memorials Limited | Administrative & support | 2010 |
| Ryder-Davies & Partners Veterinary Limited | Professional & scientific | 2024 |
| Ryder-Davies & Steventon Property Limited | Real estate | 2024 |
| Rædwald Intelligence Ltd | Information & communication | 2026 |
| S & L Holiday Lettings Limited | Real estate | 2024 |
| S & N Scaffolding East Anglia Limited | Construction | 2026 |
| S B Rice Limited | Professional & scientific | 2012 |
| S J Bloomfield Engineering Ltd | Manufacturing | 2014 |
| S R LEE Builder Limited | Construction | 2014 |
| S R LEE Limited | Construction | 2000 |
| S Street Ltd | Real estate | 2022 |
| S&A Business Consulting Ltd | Professional & scientific | 2022 |
| S. M. Seaber Limited | Construction | 2003 |
| S.C.L. Landscape Management Limited | Administrative & support | 2002 |
| Safeguard Project Solutions Limited | Construction | 2025 |
| Saferail Systems Ltd | Manufacturing | 2012 |
| Safety Arrest Solutions Limited | Construction | 2002 |
| Safetyboss Limited | Other services | 2001 |
| Sail Mail Ltd | Transport & logistics | 2022 |
| Salelink Management Limited | Information & communication | 2002 |
| Salepath Digital Limited | Information & communication | 2016 |