| RM Fieldspro Ltd | Agriculture & fishing | 2025 |
| RM Safety Consulting Ltd | Administrative & support | 2024 |
| ROB Kinsman Limited | Arts & recreation | 2006 |
| Robert Gray Farming Contractors Ltd | Agriculture & fishing | 1998 |
| Rock Coat Ltd | Construction | 2025 |
| Rockpoint Capital Ltd | Construction | 2025 |
| Roots Developments Ltd | Construction | 2018 |
| Ruby Geoconsult Ltd | Mining & quarrying | 2008 |
| Rugfleet Limited | Professional & scientific | 1988 |
| Rush Removals Ltd | Transport & logistics | 2019 |
| S Davis Welding & Fabrication Limited | Manufacturing | 2025 |
| S F C Limited | Manufacturing | 2006 |
| S O E Contracts Limited | Construction | 2005 |
| S.J. Weston & SON Ltd. | Construction | 1995 |
| SA Studio Architecture Ltd | Professional & scientific | 2013 |
| Safe in the Burrow Ltd | Wholesale & retail | 2025 |
| Safe International | Health & social care | 2005 |
| Salvage Wire Limited | Professional & scientific | 2008 |
| Salway Consulting Limited | Other services | 2009 |
| Sapientia Education Trust | Education | 2010 |
| Sapientia Lettings Ltd | Real estate | 2010 |
| Sarah Munday Limited | Manufacturing | 2017 |
| Sathudee Limited | Hospitality | 2017 |
| Saxon Fitness Ltd | Other services | 2018 |
| Saxon Surveying Ltd | Professional & scientific | 2021 |
| SB Painting Ltd | Construction | 2022 |
| Scaffs UK East Anglia Ltd | Wholesale & retail | 2025 |
| Scholars Court Limited | Households | 2009 |
| Schoolwear International Limited | Wholesale & retail | 2008 |
| SD Farrier Services Limited | Other services | 2025 |
| Seamless Surface Academy Ltd | Other services | 2021 |
| Seamless Surface Group Ltd | Manufacturing | 2026 |
| Sedge Services Limited | Information & communication | 2015 |
| Senid UK Ltd | Information & communication | 2023 |
| Senior Developments Ltd | Real estate | 2023 |
| Sensi Limited | Health & social care | 2013 |
| Sensory Sensations Ltd | Arts & recreation | 2025 |
| Serenity Caravan Holiday Homes Limited | Hospitality | 2025 |
| Service Centre 05 Ltd | Construction | 2022 |
| Seven Point Five Training Ltd. | Education | 2017 |
| SFS Systems Ltd | Professional & scientific | 1997 |
| Sganorwich Ltd | Wholesale & retail | 2025 |
| Sharp Auto Electrical Ltd | Wholesale & retail | 2021 |
| Shavings Kitchens Ltd | Wholesale & retail | 2015 |
| SHG Construction Limited | Construction | 2026 |
| Shinsan Limited | Professional & scientific | 2018 |
| Shout Design Studio Ltd | Information & communication | 2023 |
| Shsne Limited | Hospitality | 2026 |
| Signline Signs and Printing Ltd | Manufacturing | 2017 |
| Siju's Group Ltd | Professional & scientific | 2025 |
| Simple Electronics Ltd | Wholesale & retail | 2006 |
| Simply the Mustard Ltd | Real estate | 2025 |
| Singpath EA Ltd | Health & social care | 2019 |
| Singpath Properties Ltd | Real estate | 2019 |
| Sivaganga Cash and Carry Limited | Wholesale & retail | 2024 |
| Skillplane Limited | Construction | 2017 |
| Skills 4 Service Ltd | Hospitality | 2019 |
| Skipping Block Ltd | Professional & scientific | 2018 |
| SMP Auto Services Ltd | Wholesale & retail | 2023 |
| Something to Write Home About Limited | Information & communication | 2013 |
| South Norfolk Radio CIC | Information & communication | 2018 |
| Sparkling Homes Limited | Administrative & support | 2024 |
| SPEAK2IMPACT Ltd. | Arts & recreation | 2015 |
| Spiderit Ltd | Information & communication | 2023 |
| SPM Business Consultants Limited | Professional & scientific | 2016 |
| Spray Cork Norfolk Limited | Construction | 2025 |
| Square Globe Limited | Professional & scientific | 2019 |
| SQUARE1 Installations Ltd | Construction | 2021 |
| Squaretrade Carpets and Flooring Limited | Construction | 2021 |
| Ssas Innovations Ltd | Information & communication | 2025 |
| Staged Ready Ltd | Professional & scientific | 2026 |
| Standley Steel Stockholders Ltd | Manufacturing | 2020 |
| Star Cloud Data Consultancy UK Limited | Information & communication | 2023 |
| Stauff Anglia Limited | Wholesale & retail | 2006 |
| Stax Ventilation & Site Services Ltd | Construction | 2026 |
| Steady Uprising Ltd | Administrative & support | 2026 |
| Stearn Farms Limited | Agriculture & fishing | 1966 |
| Stli Limited | Financial services | 2017 |
| Stonetrad Ltd | Information & communication | 2010 |
| Strive for Design Interior Consultants Ltd | Wholesale & retail | 2025 |
| Studio 8 Hair Ltd | Other services | 2026 |
| Stwha Touring Limited | Arts & recreation | 2024 |
| Style Atom Ltd | Other services | 2023 |
| Summit Sports Media Ltd | Professional & scientific | 2025 |
| Sunstone Living Ltd | Construction | 2019 |
| Supalign Construction UK Ltd | Construction | 2022 |
| Support East Limited | Health & social care | 2012 |
| Sureline Consulting Ltd. | Professional & scientific | 2016 |
| Sustainable Wymondham CIC | Administrative & support | 2023 |
| Svensson Property Holdings Ltd | Real estate | 2026 |
| SWG Advisory Limited | Professional & scientific | 2016 |
| SWG Capital Limited | Professional & scientific | 2024 |
| Swift Enterprises Sussex Limited | Professional & scientific | 2019 |
| Syamic Consulting Ltd | Information & communication | 2020 |
| Syamic Ltd | Information & communication | 2018 |
| Systems Audits Certification Bureau Limited | Professional & scientific | 2012 |
| T Cranness Ltd | Construction | 2010 |
| T T L Norfolk Limited | Professional & scientific | 2025 |
| T. G. Bodyshop Limited | Extraterritorial | 2010 |
| T11EEY Holdings Ltd | Financial services | 2025 |