| Rise Audio Gear Ltd | Wholesale & retail | 2025 |
| Rising Lights Music Ltd | Information & communication | 2024 |
| Risk Management Outsourcing Ltd | Administrative & support | 2025 |
| Riskology Solutions Limited | Information & communication | 2016 |
| Rite IT Solutions Limited | Information & communication | 2015 |
| Ritefab Precision Fabrication Limited | Manufacturing | 2025 |
| Ritelite (Systems) Limited | Manufacturing | 1988 |
| Ritelite (US) Limited | Wholesale & retail | 2017 |
| River Eden Farms Milling Ltd | Manufacturing | 2026 |
| River Lane Assets Ltd | Real estate | 2018 |
| Riverside Real Estate Consulting Ltd | Professional & scientific | 2026 |
| RMC Dream Developments Limited | Other services | 2019 |
| RNT Building Services Limited | Construction | 2016 |
| RO Skin Limited | Other services | 2009 |
| Roadhouse Motorcycles Ltd | Wholesale & retail | 2017 |
| Roan Fabrication Limited | Manufacturing | 2013 |
| Robert J. Beaver Limited | Agriculture & fishing | 1978 |
| Robert Johnson Garden Design Ltd | Professional & scientific | 2022 |
| Robert Loomes Stamford Limited | Manufacturing | 2011 |
| Robertson & Bridge Ltd | Professional & scientific | 2020 |
| Robusto House Limited | Wholesale & retail | 2017 |
| Rockrose Events Ltd | Financial services | 2026 |
| Roddy Limited | Information & communication | 2022 |
| Roleplay UK Limited | Administrative & support | 2002 |
| Room and Home Letting Ltd | Real estate | 2025 |
| Rosara Property Limited | Real estate | 2021 |
| Rosasskn Ltd | Other services | 2025 |
| Rosebellemae Ltd | Hospitality | 2025 |
| Rowe Chiropractic Limited | Health & social care | 2025 |
| Rpmc Limited | Professional & scientific | 2020 |
| RS Mobile Services Ltd | Wholesale & retail | 2023 |
| RS Networks Ltd | Information & communication | 2024 |
| Rtribe Lifestyle Ltd | Wholesale & retail | 2025 |
| Ruby Holidays Ltd | Hospitality | 2022 |
| Ruby Retreats Ltd | Hospitality | 2021 |
| Ruddy K B Investments Limited | Real estate | 2017 |
| Rufus Properties Limited | Construction | 1988 |
| Rugby Nuts Limited | Professional & scientific | 2003 |
| Rumball Construction Limited | Construction | 1997 |
| Runaway Media Ltd | Information & communication | 2019 |
| Rural Inc Ltd | Real estate | 2023 |
| Ruthlyn Registrars Limited | Professional & scientific | 1971 |
| Rutland Autos Ltd | Wholesale & retail | 2016 |
| Rutland Designs Ltd | Wholesale & retail | 2021 |
| Rutland Development Partners Limited | Real estate | 2025 |
| Rutland Developments Ltd | Construction | 2017 |
| Rutland Electrical Solutions Limited | Construction | 2024 |
| Rutland Estates Limited | Real estate | 1998 |
| Rutland Florals Limited | Wholesale & retail | 2024 |
| Rutland Flower Show Ltd | Administrative & support | 2024 |
| Rutland Grange Management Company Limited | Other services | 2000 |
| Rutland HCW Ltd | Other services | 2014 |
| Rutland Lodge Rentals Limited | Hospitality | 2022 |
| Rutland Poultry Limited | Agriculture & fishing | 2004 |
| Rutland Simulated Game Limited | Arts & recreation | 2021 |
| RV Management Limited | Other services | 2004 |
| Ryhall Distillery Limited | Manufacturing | 2017 |
| Ryhall Idea Ltd | Wholesale & retail | 2019 |
| S James Prestige Ltd | Wholesale & retail | 2014 |
| S Rowlands Investments Ltd | Financial services | 2022 |
| S&D Collective Ventures Limited | Administrative & support | 2024 |
| S&K Franklin Property Holdings Ltd | Real estate | 2021 |
| S.E.T. Export International Limited | Manufacturing | 1994 |
| S.O.S. Tech Holdings Limited | Hospitality | 1994 |
| S14 Ltd | Manufacturing | 2025 |
| Saafehouse Ltd | Information & communication | 2025 |
| Sabre Safety and Health Consultancy Ltd | Professional & scientific | 2026 |
| Safe Harbours Online Ltd | Health & social care | 2024 |
| Safeguard IT Limited | Information & communication | 2008 |
| Sai-Automation & Controls Ltd | Energy | 2024 |
| Salesolution Ltd | Professional & scientific | 2025 |
| Salt & Pepper Stamford Ltd | Professional & scientific | 2015 |
| Salt Design Limited | Professional & scientific | 2019 |
| Salve II Limited | Information & communication | 2024 |
| SAM Sinclair Consulting Limited | Professional & scientific | 2022 |
| SAM Underwood Ltd | Administrative & support | 2020 |
| Samwidj Ltd | Health & social care | 2009 |
| Sanctuary Developments Cambs Ltd | Construction | 2025 |
| Sanctuary Interiors Limited | Construction | 2023 |
| Sanders Walk Residents Company Limited | Households | 2005 |
| Sanderson & SON Fine Watches Limited | Wholesale & retail | 2004 |
| Sando Truck and Farm Services Limited | Transport & logistics | 2018 |
| SAS Towers Change and Transformation Consulting Ltd | Professional & scientific | 2026 |
| Savage Ramsden Consultancy Ltd | Professional & scientific | 2025 |
| Saward Homes Limited | Real estate | 2024 |
| Saxon Hall Farms Limited | Professional & scientific | 1954 |
| SBC Stamford North Ltd | Construction | 2024 |
| SBW Network Limited | Other services | 2025 |
| Scarborough Water Park Hotel Limited | Construction | 2018 |
| SCO Productions Limited | Arts & recreation | 2025 |
| Scoltock RAY Limited | Real estate | 2018 |
| Scotbeach | Administrative & support | 2019 |
| Scotgate Consulting (Stamford) Ltd | Professional & scientific | 2023 |
| Scotgate Mobility Limited | Real estate | 2016 |
| Scotts International Limited | Wholesale & retail | 2006 |
| Scout Recruiting Ltd | Administrative & support | 2016 |
| SCSD03 Limited | Households | 2023 |
| Sculthorpe Property Lets Limited | Hospitality | 2018 |
| SD Orthopaedics Ltd | Health & social care | 2021 |
| SD Ventures Limited | Information & communication | 2023 |