| Result Central Ltd | Information & communication | 2007 |
| Retina Digital Limited | Information & communication | 2024 |
| Retreat Court Management Company Limited | Households | 1999 |
| Reyouth Aesthetics Ltd | Other services | 2021 |
| RG Engineering Consultants Limited | Administrative & support | 2013 |
| Rgdb Holdings Limited | Real estate | 2016 |
| Richard Hollis (Holdings) Ltd | Financial services | 2014 |
| Riggers - Uk.Com Limited | Extraterritorial | 2004 |
| Right Team Recruitment Ltd | Administrative & support | 2013 |
| Rightnurse Care Services Ltd | Health & social care | 2026 |
| Rising Labour Ltd | Administrative & support | 2022 |
| Rite on GAS Services Ltd | Professional & scientific | 2025 |
| RK Engineering (SW) Limited | Wholesale & retail | 2005 |
| RLJ Environmental Limited | Professional & scientific | 2023 |
| Robbies Garden Services Ltd | Other services | 2003 |
| Robotmother Limited | Real estate | 2002 |
| Rolo Pubs Limited | Hospitality | 2019 |
| Rooms at the Scholar Ltd | Hospitality | 2025 |
| Ropes & Wire Ltd | Wholesale & retail | 2020 |
| Rosemellyn Storage Ltd | Transport & logistics | 2024 |
| Rosemullion Distillery Ltd | Manufacturing | 2017 |
| Rosewithian Courtyard Management Company Limited | Households | 2019 |
| Rosswithian Barns Management Company Limited | Other services | 2016 |
| Route 52 Cars Ltd | Other services | 2019 |
| Rowes Retreats Ltd | Real estate | 2024 |
| Rugooo Ltd | Wholesale & retail | 2019 |
| Ruling Services Ltd | Construction | 2015 |
| Rustler Motor Yachts Ltd. | Manufacturing | 2021 |
| S & a Manufacturing Limited | Manufacturing | 2009 |
| S.W Hunt Heating Services Limited | Construction | 2015 |
| Sabzi Ltd | Hospitality | 2019 |
| Saffron Walden Chiropractic Clinic Limited | Health & social care | 2005 |
| Sage Cookware Ltd | Wholesale & retail | 2013 |
| Sailors Creek C.I.C. | Real estate | 2017 |
| Salt & Stone Decorating Ltd | Construction | 2026 |
| Saltwater Services and Fabrication Ltd | Manufacturing | 2026 |
| Sand Bay Property (Management) Limited | Households | 1973 |
| Sanders Design Ltd | Information & communication | 2021 |
| Sandy’S Deli Ltd | Hospitality | 2024 |
| Savoury Soaps Limited | Real estate | 2008 |
| Savvy Education Ltd | Education | 2013 |
| SAW & Stage C.I.C. | Manufacturing | 2020 |
| Saxon Gate Property Ltd | Real estate | 2018 |
| Scafffloat Ltd | Transport & logistics | 2018 |
| Scaffwest Services Limited | Construction | 2013 |
| Schwarz Monch Ltd | Manufacturing | 2021 |
| SDH Marketing Limited | Professional & scientific | 2006 |
| Sdr-Radio.Com Limited | Information & communication | 2015 |
| Seaware Limited | Wholesale & retail | 1988 |
| Sechoia Ltd | Information & communication | 2018 |
| Seefood Ltd | Information & communication | 2019 |
| Selinoo Ltd | Construction | 2020 |
| Sendtac Ltd | Education | 2017 |
| Sensitisers (Penryn) Limited | Professional & scientific | 1979 |
| Sensitisers Group Ltd. | Professional & scientific | 1998 |
| Sequoia Movement Ltd | Arts & recreation | 2019 |
| Sergio Solutions Ltd | Administrative & support | 2017 |
| Servian Ltd | Construction | 2018 |
| Sew-Quick Sewing Machine Services Ltd | Administrative & support | 2002 |
| SG Agriculture Limited | Wholesale & retail | 2021 |
| Shakeout C.I.C. | Arts & recreation | 2024 |
| Shelburne Flats Management Company Limited | Households | 2019 |
| Shepherd Contracting Limited | Construction | 2012 |
| Shepherd Farming (SW) Ltd | Agriculture & fishing | 2024 |
| Shepherd Holdings Limited | Real estate | 2021 |
| Shepherd Systems Limited | Real estate | 2000 |
| Showing Scene Ltd | Information & communication | 2017 |
| SHY Talk Ltd | Arts & recreation | 2023 |
| Silver Sprout Ltd | Administrative & support | 2024 |
| Silverlinings Wedding Fairs (Midlands) Limited | Other services | 2018 |
| SIMBA360 Limited | Administrative & support | 2018 |
| Simply Just One Ltd | Wholesale & retail | 2019 |
| SIR Miles Ltd | Agriculture & fishing | 2017 |
| Situ Collective Ltd | Hospitality | 2020 |
| SJA Maintenance Building and Landscape Services Limited | Construction | 2023 |
| Sketch London Architects Limited | Professional & scientific | 2014 |
| Skillsolve Training Limited | Professional & scientific | 2011 |
| Skyline Painting Contractors Ltd. | Construction | 2001 |
| Sloth and Sparrow Ltd | Other services | 2016 |
| Small Acts Limited | Arts & recreation | 2018 |
| Smashed Window Community Theatre CIC | Arts & recreation | 2023 |
| Smith & Reed Holdings Limited | Financial services | 2021 |
| Smith & Reed Recruitment (SW) Limited | Administrative & support | 2008 |
| Smith ENT Ltd | Transport & logistics | 2022 |
| SN Partners Limited | Financial services | 2021 |
| Snowdon Property Limited | Construction | 2012 |
| Snowdon Property Management (Hayle) Limited | Households | 2021 |
| Socio Fish Ltd | Agriculture & fishing | 2007 |
| Solcintra Ltd | Health & social care | 2013 |
| Solidarity Solar Ltd | Energy | 2021 |
| Solution Cornwall Ltd | Wholesale & retail | 2024 |
| Solvability Consulting Limited | Real estate | 2009 |
| Soul Float Limited | Health & social care | 2023 |
| South Cliff Management Company Limited | Households | 1982 |
| South West Composites Ltd | Manufacturing | 2023 |
| South West Driveways Limited | Construction | 2008 |
| South West Guttering Services Ltd | Construction | 2018 |
| Southern IT Services Limited | Other services | 2019 |
| SP (Cornwall) Ltd | Construction | 2025 |
| Spartacus Investments Ltd | Real estate | 2025 |