| Robert Bruce Fitzmaurice (Group) Limited | Professional & scientific | 1992 |
| Robert FOX & Sons Electrical Mechanical Agricultural Pump Engineers Limited | Professional & scientific | 2019 |
| Roberts Trans Limited | Transport & logistics | 2014 |
| Robins Nest Homes Limited | Hospitality | 2017 |
| Roboro Limited | Professional & scientific | 2023 |
| Robyem Ltd | Transport & logistics | 2017 |
| Rock Recycling Limited | Wholesale & retail | 2022 |
| Roken Electronics (Europe) Limited | | 1972 |
| Rolamat Patent Limited | Extraterritorial | 1991 |
| Romee Property Ltd | Real estate | 2021 |
| Romsey Picture Framing Company Limited | Arts & recreation | 2016 |
| Ronovatec UK Limited | Manufacturing | 2023 |
| Rooksbury Community Support CIC | Hospitality | 2025 |
| Rooksbury Mill Court Limited | Real estate | 2008 |
| Rooksbury Mill House Garden Limited | Administrative & support | 2003 |
| Rookwood Limited | Real estate | 2005 |
| Roots to Shoots Gardening Ltd | Administrative & support | 2023 |
| ROPES2GROUND Limited | Information & communication | 2016 |
| Rose Emerald Enterprise Ltd | Real estate | 2024 |
| Rose Platinum Ltd | Hospitality | 2023 |
| Rose&Roberts Ltd | Other services | 2026 |
| Rosehill Sugar Confectionery Ltd | Manufacturing | 2025 |
| Rosier's Construction Specialist Brickwork Ltd | Construction | 2025 |
| Roslyn Swimming Academy Limited | Arts & recreation | 2005 |
| Route Coffee Hatch Limited | Hospitality | 2026 |
| Rowbury Farm Camping Limited | Hospitality | 2018 |
| Rowland Thomas Limited | Construction | 2023 |
| Rowles Enterprises Ltd | Information & communication | 2024 |
| Royzoe Limited | Administrative & support | 2026 |
| RR Trans Ltd | Transport & logistics | 2014 |
| Rrev Ltd | Construction | 2021 |
| RRS Vehicle Maintenance Ltd | Professional & scientific | 2026 |
| RSK Rental Limited | Real estate | 2017 |
| RSL Coaching Ltd | Professional & scientific | 2022 |
| RSR Recruitment Limited | Administrative & support | 2021 |
| RT Adventures Ltd | Administrative & support | 2019 |
| RT Developments Holdco Ltd | Financial services | 2026 |
| Rtdtr Accounting Ltd | Professional & scientific | 2015 |
| Running on Empty CIC | Other services | 2024 |
| Running Paws & FUN Retreats Ltd | Other services | 2024 |
| Rupert Broad Trading Limited | Wholesale & retail | 2026 |
| Rural Business Hub Ltd | Administrative & support | 2015 |
| Rural Community Partnership C.I.C. | Information & communication | 2026 |
| Rural Nests Ltd | Construction | 2026 |
| Russell Court (Andover) Management Company Limited | Real estate | 2015 |
| Russells Stainless Rigging Ltd | Manufacturing | 2023 |
| Rustic Estates Limited | Real estate | 1936 |
| Ryan Floors Limited | Construction | 2023 |
| Rylos Design Limited | Administrative & support | 2009 |
| Ryman Healthcare Limited | Health & social care | 2009 |
| S E Parker Limited | Information & communication | 2022 |
| S East Solutions Ltd | Construction | 2025 |
| S K Landscapes Ltd | Administrative & support | 2025 |
| S Morris Flat Roofing Limited | Construction | 2024 |
| S O'Brien Build Ltd | Construction | 2023 |
| S&G Commercials Ltd | Wholesale & retail | 2020 |
| S. & J. Maddocks Limited | Other services | 2007 |
| S.H.G Health Care Ltd | Health & social care | 2024 |
| S360 Digital UK Ltd | Information & communication | 2010 |
| S73 Colour Specialist Ltd | Other services | 2019 |
| Saab Construction Services Limited | Construction | 2024 |
| Sabela Consulting Ltd | Professional & scientific | 2012 |
| Sackville-West Ltd | Transport & logistics | 2015 |
| Saddlers Mews (Fyfield) Limited | Real estate | 2005 |
| Safe and Sound Trading Ltd | Wholesale & retail | 2025 |
| Safe Electrical Solutions Limited | Construction | 2009 |
| Safeline Couriers Ltd | Transport & logistics | 2016 |
| Safety First Joinery Limited | Construction | 2024 |
| SAG Flame Ltd | Hospitality | 2025 |
| Sakan Cloud Consulting Ltd | Information & communication | 2018 |
| Sale TRE Limited | Professional & scientific | 2006 |
| Salisbury Apps Limited | Information & communication | 2015 |
| Salterns Collective Limited | Households | 2024 |
| Saltour Ltd | Transport & logistics | 2024 |
| Samar Precision Engineering Limited | Manufacturing | 1990 |
| Samuel Rusu Productions Ltd | Administrative & support | 2022 |
| Samus Digital Technology Limited | Information & communication | 2022 |
| Sands 688 Limited | Hospitality | 2021 |
| Sands Cuisine Limited | Hospitality | 2026 |
| Sandy Care Services Ltd | Health & social care | 2017 |
| Sapan Entertainments Limited | Arts & recreation | 2003 |
| Saqer Capital Ltd | Other services | 2013 |
| Sargeant Developments Ltd | Other services | 2012 |
| Sari Mavi Ltd | Manufacturing | 2026 |
| Sarkis ASH EOT Limited | Administrative & support | 2023 |
| Sarkis EOT Limited | Administrative & support | 2023 |
| Sarkis Limited | Financial services | 2013 |
| Sarkis Oak EOT Limited | Administrative & support | 2023 |
| SAS Computing Limited | Information & communication | 2024 |
| Saudi Money Ltd. | Financial services | 2012 |
| Saxon Accountancy Services Limited | Professional & scientific | 2008 |
| Saxon Designs Ltd | Construction | 2005 |
| Saxon Gate Homes (South) Ltd | Construction | 2020 |
| Saxon Gate Homes Ltd | Construction | 2017 |
| Saxon Safety Ltd | Professional & scientific | 2018 |
| Saxons Properties Ltd | Other services | 2006 |
| Sbat Limited | Information & communication | 2013 |
| SBW Grant Limited | Administrative & support | 2025 |
| SC Property Services Limited | Hospitality | 2017 |
| Scaffold Pro Ltd | Construction | 2026 |