| R & S Duke Limited | Hospitality | 2003 |
| R M Sargeant Landscaping & Fencing Ltd | Administrative & support | 2021 |
| R&R Building Group Ltd | Construction | 2025 |
| Raptor IT Ltd | Information & communication | 2020 |
| Red Dogs Transport Ltd | Transport & logistics | 2017 |
| Redstone Workplace Interiors Limited | Construction | 2012 |
| Regal Investments GBR Ltd | Real estate | 2024 |
| Rejb Sports Services Ltd | Manufacturing | 2022 |
| Right Move Home Improvements Ltd | Administrative & support | 2024 |
| Robinson & SON GBR Ltd | Professional & scientific | 2024 |
| Roger Hyde Flooring Limited | Construction | 2001 |
| Roger Hyde Limited | Construction | 1973 |
| Rohan Arthur Homes Ltd | Real estate | 2024 |
| Rolevita Limited | Information & communication | 2010 |
| Rory Hanley Farriery Ltd | Agriculture & fishing | 2021 |
| Rosa Sibaja Ltd | Professional & scientific | 2018 |
| Rosegrade Limited | Construction | 1984 |
| ROY Gibbens Carpentry & Joinery Ltd | Construction | 2021 |
| RS & SON Contractors Ltd | Construction | 2024 |
| RS Driveway and Landscapes Ltd | Construction | 2021 |
| RSH Services Suffolk Ltd | Manufacturing | 2025 |
| Rules House Ltd | Wholesale & retail | 2021 |
| Rumax Consulting Limited | Professional & scientific | 2020 |
| Runwood Homes Limited | Health & social care | 1962 |
| S & J Refurbishments Ltd | Construction | 2023 |
| S L C Financial Planning Limited | Financial services | 2014 |
| S R Wordley Building Services Ltd | Construction | 2010 |
| S.S Heating Services (Suffolk) Ltd | Construction | 2024 |
| Samalice Investment S Limited | Transport & logistics | 2024 |
| Sanders Senior Living Limited | Health & social care | 2017 |
| Sarenity Limited | Hospitality | 2015 |
| SCE Electrical Ltd | Construction | 2016 |
| Sea Leap Properties Ltd | Real estate | 2023 |
| Shush Mush Ltd | Manufacturing | 2023 |
| Simeon’S Removals Ltd | Transport & logistics | 2026 |
| SJC Management Consulting Limited | Professional & scientific | 2018 |
| Skybrands Limited | Professional & scientific | 2012 |
| SLA Consulting (Offton) Ltd | Professional & scientific | 2025 |
| SLC Electrical Services Ltd | Construction | 2026 |
| Specialist Installations Services Ltd | Construction | 2024 |
| SPL Paving Ltd | Construction | 2022 |
| ST Kevins Construction Services Ltd | Professional & scientific | 2013 |
| ST Therapy Services Ltd | Health & social care | 2022 |
| Starplaza Agency Ltd | Construction | 2024 |
| Stortford Property Investments Ltd | Real estate | 2018 |
| Stour Construction Services Ltd | Professional & scientific | 2022 |
| Streetwise Cuisine Limited | Hospitality | 2016 |
| Stuart Morris Textiles Limited | Manufacturing | 1993 |
| Suffolk Automation Limited | Information & communication | 2000 |
| Suffolk Electrical Ltd | Construction | 2022 |
| Suffolk Leaf Homes Ltd | Construction | 2020 |
| Suffolk Stairs Ltd | Construction | 2022 |
| Suffolk Tax Accountants Ltd | Professional & scientific | 2020 |
| Suffolk Welding Supplies Limited | Wholesale & retail | 2026 |
| Supreme Pet Products Limited | Manufacturing | 2021 |
| Switch Mortgage Services Ltd | Financial services | 2021 |
| Switch Property Services Limited | Real estate | 2006 |
| Switch Recruitment Services Limited | Professional & scientific | 2004 |
| SWP Contracts Ltd | Construction | 2020 |
| T&S Travel Ltd | Transport & logistics | 2024 |
| Talent Box Consulting Limited | Professional & scientific | 2024 |
| Tammie Bloome Group Ltd | Real estate | 2018 |
| Tammie Developments Ltd | Real estate | 2024 |
| Tammie Group Ltd | Professional & scientific | 2024 |
| Tammie Winerack Ltd | Construction | 2025 |
| Taylor Whitmore Limited | Administrative & support | 2022 |
| Technology People Limited | Information & communication | 2020 |
| Tennial Properties Limited | Real estate | 2024 |
| THE Essex Painting Company Ltd | Construction | 2024 |
| THE Foxes DEN (Assington) Limited | Hospitality | 2021 |
| THE Hadleigh Hair Lounge Limited | Other services | 2013 |
| THE Milo Consultancy Limited | Professional & scientific | 2009 |
| THE P R Munson Group Limited | Professional & scientific | 1997 |
| THE Snug Cottage Ltd | Real estate | 2024 |
| Thermatech Fire Consultants Limited | Administrative & support | 2007 |
| Thrivall Ltd | Health & social care | 2022 |
| Tiger Building Contractors Ltd | Construction | 2022 |
| TIM Pro Estate Ltd | Real estate | 2020 |
| Tinasp Limited | Professional & scientific | 2026 |
| Tintagel Flats Management Company Ltd | Households | 2024 |
| Tito's (Suffolk) Ltd | Hospitality | 2026 |
| TKP Investment Solutions Ltd | Real estate | 2020 |
| TM4U Traffic Management Ltd | Administrative & support | 2019 |
| Tmtm Traffic Management Ltd | Administrative & support | 2016 |
| Tn's Lashxtend Beauty and Aesthetic Ltd | Other services | 2022 |
| Torisembroidery Ltd | Manufacturing | 2022 |
| Travelling Whale Ltd | Extraterritorial | 2020 |
| TRU Groundworks Limited | Construction | 2020 |
| Turners Blinds and Shutters Ltd | Manufacturing | 2011 |
| Ukct Holdings Ltd | Financial services | 2025 |
| Ultra Building Ltd | Construction | 2024 |
| Unix Land Limited | Real estate | 1990 |
| Unlockstaffpotential Ltd | Administrative & support | 2013 |
| Utel France Limited | Professional & scientific | 2009 |
| Vehicle Design Ltd | Manufacturing | 2022 |
| Vehicle Tuning Solutions Ltd | Wholesale & retail | 2024 |
| VMB Investments Ltd | Real estate | 2016 |
| Wallis Heritage Limited | Extraterritorial | 2011 |
| Wayside Vivers Maristowe Ltd | Financial services | 2023 |
| WE ARE Fred Creative Ltd | Professional & scientific | 2016 |